Soil construction technology of drill exploration

scope

This technology is applicable to the Foundation of a building or structure, (Groove) base soil quality soldering of checks.

2 construction preparation

2.1 materials and equipment

2.1.1 sand: sand in General.

2.1.2 major tools:

2.1.2.1 Manual soldering: General steel, made of steel with diameter of 22~25mm, a 60 ° taper-shaped bits, drill longer 1.8~2.0M;8~10-pound sledgehammer.

2.2.2.2 mechanical drill: portable penetrometer (Beijing region will use).

2.2.2.3 other: twine or wire, ladder (Chair), trolleys, crowbar (drawn steel) and a steel tape measure.

2.2 operating conditions:

2.2.1 base soil had been dug to pit (Groove) elevation at the end of, the surface should be flat and axis and holes (slots) width and length are in line with the design drawing requirements.

2.2.2 according to design drawings drill hole floor plan. Design no special provisions, can be performed according to table l-6.

2.2.3 night-time construction, there should be adequate lighting facilities, and research on the reasonable arrangement of solder order to prevent mistyped or missed call.

2.2.4 Rod advance 30cm on line.

3 operational processes

3.1 process:

On lines → place soldering soldering of solder points with sand

↓     ↓

Record hammering hole deep

3.2 Summary of drill hole location floor plans on line hole small stakes on the nails, or sprinkled with lime.

3.3 place soldering

3.3.1 Manual soldering: soldering tip alignment holes, inset steel, one station in operation on a stool, beaten with a hammer drill Rod top; hammer height for 50~70crn, drill vertically into the soil.

3.3.2 mechanical drill: touches the stem tip alignment hole position, then put the hammer on the rod, righting the rod, pulling up through the heart hammer, its free fall, hammer from the 50cm stem vertically into the soil contact.

3.4 record blow counts. Drill rod into the soil 30cm, record blows blow counts. Drill deep penetrating such as design provided, generally performed as l-6.

3.5 remove solder: Use Twine or wire tie rod, live sets, insert a crowbar or metal pipes, use the principle of leverage, the bit out. Each pulled out a rope down a, and so on, up until fully extended.

3.6 shift: rod or cone to move to the next hole, so as to continue to drill.

3.7 sand: after drill hole, pass quality inspection and associated after the foreman check the hole depth and record correctly, you can carry out sand filling. When the sand, fill every available 30cm or steel rod ramming a stick again. Sand has two forms, one per hole punch out sand filling in time after a few holes played; the other is after playing every day, uniform sand again.

Drill hole arrangement of table 1-6

Slot width

(Cm) spacing

(M) deep

(m)

2.0

Column base

Plum blossom

1.5~2.0

1.5, and

Light in

Short edge

3.8 document: numbered sequentially as drill hole, hammer within a few fill in the standardized form. Write clearly and after soldering and technician signature archive.

3.9 winter and rain during construction:

3.9.1 base soil after rain, shall not be carried out research on brazing.

When Rod sounding 3.9.2 base soil in winter, flip cover insulation materials in a timely manner after each play a few holes, no massive flip cover, protect the soil from freezing.

4 quality criteria

4.1 project:

Rod sounding depth must conform to the requirements, hammer recorded accurately, not false.

4.2 Basic project

4.2.1 soldering bit is accurate, hole shall not be missed.

4.2.2 under drill hole sand should be dense.

5 finished product protection

5.1 soldering after the study is completed, should be well marked, protect the drill hole without quality checks and associated foreman re-inspection shall not be plugged or sand.

6 quality problems to be noticed

6.1 if steel to fight on, and should ask about the foreman or technician: cancel the drill hole on or soldering. Had to fight, to fill in the hammer.

6.2 record hole location and floor plan a mistake:

6.2.1 soldering hole layout of drill hole with drill holes on the sheet control, there is no error. Errors corrected or supplemented.

6.2.2 in the record sheet with colored pencil or a symbol different from the drill holes (hammer).

6.2.3 in the drill hole on the floor plan, indicate the location of the hole, hard or soft, graves and other dry or paint to design survey or associated departments, inspection analysis.

7 quality records

This standard shall meet the following quality records:

Engineering geology investigation report.