Steel frame wood (bamboo) plywood installation and removal process

1 scope

This technology is applicable to industrial and civil building in-situ concrete frame (including frame-shear wall), shear walls and core walls formwork structures.

2 construction preparation

2.1 materials and equipment:

2.1.1 steel frame wood (bamboo) plywood pieces: length 900, 1200, 1500, 1800 and 2400mm; a width of 300, 450, 600 and 750mm. Strip of a width of 100, 150 and 200mm, with a combined steel formwork.

2.1.2 fixed mould steel angle: the internal corner mould 150mmx150mmx900mm (1200-1500, 1800mm), Yang Jiaomo 150x150x900mm (1200, 1500, 1800), adjustable internal corner mould 250mmx250mmx900mm (1200-1500, 1800mm) and adjustable t type control templates, l-adjustable template and connection die and so on.

2.1.3 connection accessories: u-shaped cards, fasteners, bolts, hook bolt, type l plugs, wall bolts, waterproof wall tie rod bolts, cylinder hoop mode setting.

2.1.4 supporting system: keel shaped cavity (truss), Bowl vertical poles, Rails, ramps, double adjustable early split-wing support, single adjustable early split-wing support, pole pad, adjustable pole base and template to the leg side, wood.

2.1.5 release agents: water barrier.

2.1.6 tools: Iron Hammer, active (set) Board, a spirit level, steel tape, supporting Board, lightweight ladders, scaffold, cranes, etc.

2.2 operating conditions:

2.2.1 template design:

2.2.1.1 establish the construction area, Division of works. According to the forms and characteristics of engineering structure and site conditions, determines the formwork of the water sector to reduce template input, increased turnover, balance process engineering (rebar, formwork, concrete operations) operations.

2.2.1.2 determining template plane construction general plan. Marking the various components in the total figure models, location, quantity, size, height and of the same or slightly hard up that same component substitution and number to reduce the boards of type, quantity and clear template alternative flows and positions.

2.2.1.3 determining template distribution sheet layout and support arrangement. According to the General plan for beams and slabs, columns, such as the size and number of design boards, signs of different types, size, single block template layout, and vertical and horizontal size specifications, quantity and arrangement of the keel; form and the selection of column Stirrup spacing; supporting system for the vertical supports, lateral support, lateral pull connector type, spacing. When the precast should also draw marking the Assembly fixed size and its relationship with the surrounding.

2.2.1.4 the drawing and check: in formwork panels layout and support system based on strictly to check its strength, rigidity and stability, qualified to draw a full set of template designs, including: template layout panels, block diagram, Assembly diagram, a node detail, parts and non-stereotyped extension processing.

2.2.1.5 axis, template lines (or mold to take line) line is completed. Horizontal elevation control measurement to the reserved reinforcing or other points of transition, and to run the preflight procedures.

2.2.3 template at the bottom, and sideline 1:3 cement mortar used in the template, according to the given elevations accurate leveling. Roots outside of the walls and exterior columns, wood under elevation line templates, and level on the looking for dry mortar in order to ensure accurate elevation and no leakage.

2.2.4 setting template (protective layer) benchmark, that is, from the ground in the main bar of wall and column 5~8cm, according to the template lines, by level of cover thickness welded support bars to prevent template horizontal displacement.

2.2.5 pillars, walls, formwork reinforcement finished; utility lines, set aside. Embedded parts have been installed, strap reinforcement pad and finish hidden preflight procedures.

2.2.6 pre-assembled group template:

2.2.6.1 assembling template space should be solid formation, when conditions permit, should be assembled operating platform.

2.2.6.2 by template design panels are assembled, all the card connector fastening to be effective.

2.2.6.3 pillars and wall template at the time of installation, cleaning, vibrating mouth should be set aside.

2.2.6.4 assembled templates according to drawings to check the diagonals, smoothness, shape, dimensions and number of fasteners is valid and reliable. Xu brushed, and release agents, fwyg specifications.

3 construction technology

3.1 column templates installation process:

3.1.1 single block in place set spell process:

→ First floor sheathing installation installation installation shelf → check → install the diagonal, vertical and location column collar

Second to third tier hoop columns and column Setup → column templates → groups → full check correction of the beam aperture fixed

3.1.2 monolithic formwork construction installation:

3.1.2 will post the first group of four templates in place in place, each with a connected internal corner mould or die, alternating with your u-card connection.

3.1.2.2 the template on all sides by the given column section in place, and vertical and diagonal are equal.

3.1.2.3 styling hoop fixed columns, wedge in place, pin-plug the iron in prison.

3.1.2.4 the first floor as a benchmark, in the same way groups fight second to third tier until the Liang Kouzhu template. With u-shaped card for alternating vertical and horizontal joints connections. Support and Rachel at the proper height to prevent dumping.

3.1.2.5 template axis displacement, vertical deviation, diagonal, full-twisting correction, and install the shaped braces or levers and braces fixed on the rings of steel bars embedded in the floor in advance, two on each side (), was 45 ° with the ground. The template for such installation must be water. Check the installation, and finally the group level (supporting) rod and scissors support fixed.

3.1.2.6 column within the root template is clean, closed cleaning.

3.1.3 monolithic group spelled formwork process:

Single pre-packaged spell spell → first column group column second column form in place of the die in place → angular connection →

Install → check the column form a diagonal of third to fourth pillar die and displacement and fix the hoop → from bottom to top posts and braces →

Overhaul quality → group columns fixed

3.1.4 monolithic group spelled the template installation important:

3.1.4.1 monolithic template, a column of four pieces, each with a die. Set of spelling of two adjacent plates each hole with a u-shaped clamp. Large columns when the rounded keel is die, hook head bolt outer pad Butterfly buckle and plate edge ribs Conca tight. Set when the open-Web steel joist, using plane-shaped steel plate threatened long Conca tight. Template groups fight to remain clean out, assembled to check the template's diagonal, smoothness and overall dimensions and number, release agents, brushing specification pile up.

3.1.4.2 hoisting the first template, and temporary support or with column main bars and wire binding the temporary fix.

3.1.4.3 immediately lifting the second column, and use the internal corner mould (or attached to die) and the first l-shaped column connection. With u-clamp the template card edge ribs and wing die, well supported or fixed.

3.1.4.4 finished third to fourth above column erected in position and connection of modules, making it barrel-shaped.

3.1.4.5 posts from bottom Hoop, required 3.1.3.3 per cent positive column model axis displacement, vertical deviation, cross, diagonal. And supports with 3.1.3.5.

3.1.4.6 the above method to install some water after Duan Zhumo, comprehensive inspection after installation and group level () lever and shear support fixed.

3.1.5 overall Group spelled formwork installation process:

Group spelled column template and hoisting → support → check → full → quality check column form groups fixed

3.1.6 overall Group spelled formwork installation important:

3.1.6.1 before lifting, check the whole group together columns from top to bottom of the section size, diagonal, connectors, cards, column the amount and degree of tightening hoop. Check whether the column has hindered pillar die sets, top and wire steel bar bound up together, with Li Zhumo from the top into.

3.1.6.2 column mod installed on the base, after oral administration of lines under the template, using four root raking or cable with TURNBUCKLE rope connected to the top corner, anchored to the ground at the other end, correcting its center line, column, line, column, modular barrel twist and vertical back support fixed. When the height exceeds 6m, should not be supported, should be a few columns support into architecture.

3.1.6.3 beam-column template based on twice, and split one template should be retained in order to facilitate the second template of beam to column connections, and Cha read smoothly.

3.2 wall installation process:

3.2.1 single wall template in place to group together the installation process:

Assembly templates → check → install doors and Windows before installation templates the first step (on both sides) installed within steel cord → →

Adjust the template straight straight → → adjust the template installed on both sides of the second step to the top template → install steel cord adjustable straight →

Installation installation wall bolt → steel cord → straight braces and adjustable templates → connect to the column, wall and floor template

3.2.2 wall form block in place set spell installation important:

3.2.2.1 in the installation template, install jambs the template line, fixed wall reinforcement, embedded parts and install a brick or wood.

3.2.2.2 install template should be used on both sides of the wall template is installed. First step template insert the Setup lock wall or pull bolts and casing, and will die on the wall line on both sides make it stable, and card or disc of steel fasteners and hook head bolts on the template, adjust the die on both sides of the straight.

3.2.2.3 used the same method to install several other templates to the top of the wall, within the lateral steel cord-mounted steel cord, and party cards or Butterfly steel fasteners with steel cord in the hook head bolt and fixed, wall bolts inserted by the steel cord, butterfly fastener with a nut tightened, on both sides of the template will become one flesh. Install diagonal bracing, adjust the template vertically, after passing, connected with the walls, columns, floor template.

3.2.2.4 hook head bolt wall bolt off, bolts and other connectors are securely attached, elastic consistency.

3.2.3 pre-assembled wall template process:

Template → check → install doors and Windows before installing side wall erected in position install diagonal bracing → →

Insert bolts through walls clean the wall of debris and plastic sleeve → → → install diagonal bracing the wall template installation the other side →

Wall bolt through the other side of the wall fastening bolts through walls → → adjust template position and the adjacent template → → braces fixed connection

3.2.4 pre-assembled wall template installation point:

3.2.4.1 check the Datum wall template installation location wall line and wall template number, after drawing, templates and embedded parts such as doors and Windows installed wood or brick.

3.2.4.2 pre-assembled side wall template line erected in position by position, install bracing or making tools-diagonal bracing adjustment to templates and the ground was 75 °, making it stable is located on the base.

3.2.4.3 installation through the wall or pull bolts and plastic casing. To make bolt stem-side up, on the casing screw, sweeping clear-mold debris.

3.2.4.4 seated in the same way wall on the other side, wall bolt through the template and bolted rod ends on fasteners and nuts, and then adjust the position of the two templates and vertical at the same time adjust the angle braces, after passing, fixed braces, all wall bolt fastening nut.

3.2.4.5 template after installation is complete, comprehensive checks whether the fasteners, bolts, braces fastened, stable, template seam and it took is tight.

3.3 beam formwork installation technology:

3.3.1 beam form a single block in place install process:

Eject the beam axis and a horizontal line and Liang Dileng → reviews → erection Liang Mo stent installed install beam or beam clamps → templates →

Beam arch at the end of installing side-Liang Mo → → → binding reinforcement Liang Mo install other side →

Install upper and lower lock cord, raking cord waist cord and pull bolt adjacent template → reviews → Liang Mo size, location and even solid

3.3.2 beam form a single block in place installation point:

3.3.2.1 pops up on concrete beam axis and the pillar in a horizontal line (Liang Dibiao high measuring purposes) total review.

3.3.2.2 install Liang Mo before the stent, the first floor for the soil surface should be flat and solid, regardless of soil or ground floor, first floor, dressed on special pillars should be paved through long hand, and floors should be in a straight line between upper and lower bearings. Pillar generally use double-row (design), and distance to 60~100cm is appropriate. Pillars even solid 10cmx10cm muleng (or steel cord) or beam clamps. Pillars below the middle and add the bar or pole, pole and adjustable stand.

3.3.2.3 pillar adjustment set thickness of beam formwork, meet the design requirements, drawing installation template and find the end of beams, die die connected to spell the end of.

3.3.2.4 binding reinforcement on the bottom, after acceptance, debris removal, install beam side templates, templates with the backplane connections on both sides die u-card connection. With Liang Ka or installing the locking cord and vertical cord, attached to braces, spacing should be 75cm. When Liang superb 60cm, need to add lumbar cord, and wear on the bolt (or wall bolt) reinforcement. Liang Mo sing along to pull straight styling clip.

3.3.2.5 review check Liang Mo, connected with the adjacent beam-column template fixed. Floor templates, internal corner mould attached to beam and formwork stitching fixed.

3.3.3 Formwork portfolio templates installation process:

Eject the beam axis and a horizontal line and review → setting → pre-Liang Mo stent group spell check → template bottom hoisting installation

Arch install → → side installation lateral support or beam clamp fixing → check the beam straight template size →

Kaliangkouka → continuous with the adjacent template fixed

3.3.4 the formwork monolithic composite formwork installation important: check spell template set of dimensions, diagonal, smoothness, connection of steel cord, hanging point's location and beam axis and elevation, after meeting the design requirements, first lifting Liang Dimo is located on a bracket, with support even and solid arch. Lifting beam, respectively on both sides of the template, and the bottom connection. Installation side support fixed, check the Liang Mo position and size are correct, then hoisting steel skeleton, or Liang Mo lashing into the die in place. Leung and catchy card card, even with the adjacent template solid. The details of the operation with a single installation technology in place.

3.3.5 overall pre-Liang Mo composite formwork installation process:

Eject the beam axis and a horizontal line and review Liang Mo integral hoisting erection Liang Mo bracket → → →

Liang Mo and supports continuous solid-Liang Mo review side braces fixed → dimensions → beam

3.3.6 overall pre-Liang Mo composite formwork installation important: review of Liang Mobiao, and axis, erection of double beam Exchange support. Short between two pillars to install wood (steel) information. Liang Dimo Lian Gutong long steel (wood) cord, to increase the bottom overall, and ease of installation. Review of pre-portfolio Liang Mo size. Connectors, steel cord and hang point location, load test. When lifting, Liang Mo sing along, adding support to increase stiffness. Hoisting, calibration beam, Liang Mo at the end on each side of the longitudinal axis, elevation hesitated, and supports cross-ridged fixed. Beam side form fixed with braces.

3.4 floor installation process:

3.4.1 single block in place floor template installation process:

Installation bracket → install vertical and horizontal steel (wood) Leng → adjust floor height and Arch →

→ Check the template flat epithelial elevation, lay the template block

3.4.2 single block in place floor template installation construction:

3.4.2.1 scaffold erection before flooring and pillars supporting feet 3.2.2.1-related content. Support pillar (available starting early split-wing side of the supporting pillars from the side, then by row installation, and installing steel (wood) cord and tie rod, the amount required by the template design. General support spacing for 80~120cm steel (wood) cord spacing is 60~120cm, needs to be filled with steel (wood) when the cord, the upper steel (wood) cord spacing is generally 40~60cm.

3.4.2.2 scaffold erection is completed, carefully check steel plate (wood) cord to connected with the pillar and support installations of solid and stable, according to a given level, carefully adjust formwork height of the wing support, steel (wood) cord leveling.

3.4.2.3 laying bamboo shaped steel box (wood) template: model, or Liang Mo yin first die and wall connections, laying flat die and then to break down. Two templates using u-shaped cards with an adjacent connections. U-clamp-and-direction anyway, and a certain number of hook head bolts (or design) with steel cord connection. Spell unit with u-shaped card set mode and then laid to reduce back, under the surface operations. Last module templates and narrow enough slit, slot die or a wood block, and seams should be tight.

3.4.2.4 die after laying is completed, on foot, feeler and spirit levels to check smoothness and floor elevation at the end of, and to make corrections.

4 template removal process

4.1 templates removed General points:

4.1.1 side dismantled: concrete strength to ensure its surface and edges are not damaged due to removed template, to be dismantled.

4.1.2 demolition of the mold and the end of winter construction template, the need to implement the code for construction and acceptance of concrete structures (GB50204-92), the relevant provisions. Operations teams must apply for approval by the technical departments of dismounting can be removed.

4.1.3 prestressed concrete structure component template removed, in addition to implementing the 4.1. the provisions of article 2, lateral modes should be removed before tensioning; die after the establishment of prestressed structure component removed.

4.1.4 removing templates and frame structures, design of concrete strength grade in the rear allowed under full load when the effects of construction load than when using a load more adverse effect must be audited, additional temporary support.

4.2 template removal of General points:

4.2.1 access templates in the order and method, should be carried out in accordance with the distribution plate design provides. If there are no design requirements should be followed after the first split, split after first can't load templates, split the load bearing part of the template after; bottom bracket to remove lateral support, removed after principles of vertical supports.

4.2.2 template project organization, should follow the model and form removal system by a working team of job execution. Its advantage is that model considering the convenience and security of dismounting, when dismounting, persons familiar with the situation, easy to find key points of dismounting, removal progress, safety, protection of the template and accessories all.

4.3 floor slab, the formwork removal process:

4.3.1 processes:

Remove bracket part horizontal lever and shear brace and remove beam connectors and side templates →

Lowered floor template support wing supporting spiral 2~3M, that a down →

Segment piecewise removal slab formwork, steel (wood) end of cord to demolition beams and pillars → formworks and supporting system

4.3.2 dismantling technology construction:

4.3.2.1 removed bracket part of the horizontal rod and scissors, for homework. Then remove the connection of beam and slab template angle mode and beam side templates, so that two adjacent template disconnection.

4.3.2.2 wing after holding screw down the pillars, first remove Gib head bolts to make bamboo flat die with steel frame and steel cord to disengage. Then remove the u-shaped and l-shaped PIN card, then steel pry gently with steel frame bamboo template, or with a wooden hammer tap, remove the first piece, and block-by-block removed piece by piece. Must not use steel or pick hammer pounding. When each piece of bamboo template removed, or with artificial care placed on the ground or pillars holding screw would drop the top wing equal height, in steel cord on the original amount of construction scaffold, to hold the removed template. Free fall to the ground is strictly forbidden to remove the template.

4.3.2.3 dismantling beam and slab template template at the end of the same. But the demolition of large-span beam template, cross-pillar began to cut the top wing in support screw, and then to the ends down one by one, and then 4.3. Article 2.2 calls for follow-up work. Demolition beams fingered pillars, from both ends of the span to the job.

4.4 post template removal process:

4.4.1 dispersed removal process:

Remove lever or raking → removed from top to bottom (to wear studs) or column collar →

Remove vertical cord, split bamboo with steel frame template → a template and accessories from the top down transportation maintenance

4.4.2 the patch process of dismounting:

Remove lever or bracing → remove column from top to bottom hoop →

Remove corner side of the u-shaped column connection cards, divided into two or four pieces detaches lifting → template

4.4.3 column form removal important:

4.4.3.1 dispersed when removing column form, top-down, hierarchical removed. When you remove the first layer with a wooden hammer or hammer with a rubber pad to the outside tap template and catchy, making it loose from the concrete. In order to remove the template, to tapping-mode edge ribs, must not be used to pry from pillar point to pry off. Remove template and accessories slide slide to the ground or lashing rope hanging down.

4.4.3.2 patch removed column templates, from the head to the outside tap and gently pry the connection die, making it loose. To add temporary support or leave a loose wall bolt in the column head, in case the whole column form the dumping hurts.

4.5 wall mold removal process:

4.5.1 wall scattered removal process:

Removed braces → Leng → outside the demolished wall bolt from top to bottom and layered dismantled from top to bottom in the cord and bamboo templates →

Template and accessories, transport and maintenance

4.5.2 wall overall demolition process:

Remove wall bolt → adjust the Delta slant leg swift feet leave the ground →

Demolition group made templates shall end joints connected by narrow template → percussion group made model Li-ridged top, make it out of the wall →

Spell mode with crowbars pried group bottom rib, make it all out of the lifting wall → group joining and die

4.5.3 wall demolition construction main points:

4.5.3.1 dispersed demolition construction of wall and column mode dispersion removed same. Only in the split single template, both ends of the wall seams narrow template, then the wall Center one block removed.

4.5.3.2 the Act group made templates, adjust the Delta slant leg screw anchor from the ground, to the template from the wall and the ground was 75 °. When no diagonal rods, removed after braces, dismantle the wall bolts, parts to be left in the top row and rows of bolts, which loosens but does not return the nut and the fastener, when pried away from the template to prevent dumping.

5 quality standards

5.1 project: template and bracket must have sufficient strength, rigidity and stability area of the supporting parts should be adequately supported. If installed in on soil, soil must be solid and drainage measures. On collapsible loess, must have a waterproof measures on frost, there must be measures to freeze-thaw.

Method: the control template design, observation or a standard check.

5.2 Basic project

5.2.1 joint width cannot be greater than 1.5mm.

Inspection method: observation and wedge feeler Gage check.

5.2.2 template clean surface and take measures to prevent the bond. Template mucilage and covered with brush the cumulative area of release agents, wall plate shall be not greater than 1000cm2; columns, Liang Ying is not more than 400cm2.

Examination method: the observed and calculated by the standard statistics.

Allowable deviation, as shown in table 4-3.

Table 4-3

Tolerance (mm)

Single-layer, multi-layer frame multi-layer model top model

Walls, beams and columns axis displacement 5 3 5 3 foot check

Elevation ± 5 +2-5 ± 5 ± 5 level or cable and check

Wall, column, beam section dimensions +4-5 +2-5 ± ± 2 feet 2 check

Each layer 3 3 3 3 2m vertical support Board check

Two adjacent surface height difference 2 2 2 2 with a ruler and the ruler check

Surface roughness 5 5 2 2 2m m on foot and feeler gauges check

Displacement of center line of embedded steel plates 3 3 3 3

Pipe reserved hole center line 3 3 3 3

Center line 2 2 2 2 cable and check

Exposed length +10 0 +10 0 +10 0 +10 0

Center line 10 10 10 10

Section size +10 0 +10 0 +10 0 +10 0

Each layer 3 3 3 3 2m vertical support Board check

6 product protection

6.1 spell set of templates to store site, site leveling and tamping. When the template flat, wooden cushion frame. When standing, to set up a classification templates, and template touch is located in wood, this template does not distort the shape. Do not heap piled up on a set of templates for spelling or in dispersed template and accessories.

6.2 face wall or column installation template when the template is not allowed to lift other collisions, in the pre-assembled before the template is in place as an interim Chair to prevent deformation or vertical deviation template. Face plane already installed, do no interim stacking and platforms to ensure stent stability, prevent deviations plane elevation and flatness.

6.3 when the template is removed, it may not touch hard prying with sledgehammers, crowbars and hard to avoid concrete shape and internal damage.

7 should pay attention to quality issues

7.1 beam and plate template: beams, uneven, down at the end of beam deflection side template beam rises up and down mode: control method is that beam and plate template at the end of the keel section dimensions and spacing, pillar shall be decided by design, make a template of the supporting system has sufficient strength and stiffness. Should earnestly implement the design requirements in the job to prevent the template deformation in concrete. Template prop should stand in a long Board is padded on the solid ground of preventing pillars sunk, beam and slab deflection. Beam and plate template design or specification Vault. Beam form should be set up and down pin cord, lateral support, to ensure that the upper and lower plate will not deform.

7.2 column template:

7.2.1 up mode, dimensions allowed: method of prevention is, according to height and cross section design sizes and spacing hoop's own column for the accounting, and the large section columns using a stud and nut to the steel cord to ensure the strength and stiffness of column form enough to withstand the lateral pressure of concrete. Carefully according to the design requirements for construction jobs.

7.2.2 pillar twisted: control method, column formwork before correction, making it first of all do not twist to it. Install diagonal bracing (or anchor), hanging wire is perpendicular to the adjacent two-column form hanging from each side at the top to two points the line fell to the ground, lines fell by two points to the column position line distances are equal, die-do not twist even told.

7.2.3 axis displacement, a row of pillars are not on the same line: method of prevention is, rows of pillars, die on the ground to eject before column axis and axis line, and then pops up the other side of the axis of each column, determine the column and the other two edges. When the formwork, both ends of the State column form, correction of vertical position is correct, the column form pilot line and column templates in the middle. Column spacing when venting horizontal rod and scissors, and column space is large, each column separately supported on four sides, each vertical and correctly positioned.

7.3 wall template:

7.3.1 varying wall thickness, flatness deviation: control is a template design with sufficient strength and stiffness, the size and spacing of the keel bolts, wall spacing, support methods, such as in the operation of the wall where you want to implement.

7.3.2 wall rot, templates at the seams run pulp control method is to template root mortar screed, and solid measures to secure the template card.

7.3.3 jambs concrete: the reason is that Windows templates with fixed wall or wall reinforcement in prison, door and window failure or insufficient support within the template.

7.4 wood and bamboo plywood form with steel frame in the use process management should be strengthened. Support, removal and transport, the light should be moved with care; found and stiffened with steel frame deformation of damage should be repaired in a timely manner; template code classification specifications, steel frame, steel ribs regularly brushing paint; on bamboo wall and the hole in the side of the plywood, cut, paint edge closed.

8 quality records

This standard shall meet the following quality records:

8.1 template project technology gives the low-down records.

8.2 template project inspection records.

8.3 template project quality assessment.