CN216551899U - Dig dado structure of pore-forming soon - Google Patents
Dig dado structure of pore-forming soon Download PDFInfo
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- CN216551899U CN216551899U CN202123279087.5U CN202123279087U CN216551899U CN 216551899 U CN216551899 U CN 216551899U CN 202123279087 U CN202123279087 U CN 202123279087U CN 216551899 U CN216551899 U CN 216551899U
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- place pile
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- hole
- rotary drilling
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Abstract
The utility model discloses a retaining wall structure for rotary drilling hole formation, which is used for rotary drilling hole formation of a sandy gravel stratum and comprises a plurality of cast-in-place pile holes, wherein retaining wall water is filled in the cast-in-place pile holes; the sandy gravel stratum sequentially comprises plain filling soil, a sand layer, a loose sandy gravel layer, a slightly dense sandy gravel layer, a medium dense sandy gravel layer, a dense sandy gravel layer and a strongly weathered muddy rock stratum from top to bottom, and the bottom of the cast-in-place pile hole reaches the strongly weathered muddy rock stratum; the utility model has simple structure and convenient use, and can pour the wall protection water into the rotary-drilled cast-in-place pile hole when the cast-in-place pile hole is rotary-drilled, thereby reducing the negative pressure influence formed by the drill bit when the rotary drill is used for lifting the drill bit.
Description
Technical Field
The utility model relates to the technical field of geotechnical engineering, in particular to a wall protection structure for rotary drilling hole forming.
Background
The problem of hole collapse of a sand layer and a slightly dense sand and gravel layer is difficult to solve when the sand and gravel layer is encountered in an underwater cast-in-place pile in the field of geotechnical engineering, a mud wall protection process, a punching and grabbing hole forming process and a full-casing follow-up hole forming process are adopted in most cases, the construction cost of the processes is high, and particularly the follow-up of the latter full-casing is high in cost and long in consumed time.
SUMMERY OF THE UTILITY MODEL
The utility model provides a wall protection structure based on a rotary drilling hole of a sandy gravel stratum, aiming at solving the technical problems.
In order to achieve the purpose, the utility model adopts the technical scheme that: the retaining wall structure for rotary drilling hole forming is used for rotary drilling hole forming of a sandy gravel stratum and comprises a plurality of cast-in-place pile holes, and retaining wall water is filled in the cast-in-place pile holes;
the sand-gravel stratum sequentially comprises plain filling soil, a sand layer, a loose sand-gravel layer, a slightly dense sand-gravel layer, a medium dense sand-gravel layer, a dense sand-gravel layer and a strongly weathered mud-rock stratum from top to bottom, and the bottom of the cast-in-place pile hole reaches the strongly weathered mud-rock stratum.
Preferably, the system also comprises a recharging well arranged on one side of the cast-in-place pile hole, the bottom of the recharging well reaches a dense sand and pebble layer on the ground, and the equivalent radius covers the cast-in-place pile hole;
the bottom of recharging well is equipped with the suction pump, the drainage end of suction pump extends to bored concrete pile downthehole through the water pipe.
Preferably, the distance between the recharging well and the cast-in-place pile hole is within the dewatering radius of the recharging well.
Preferably, a plurality of the cast-in-place pile holes are meshed.
Preferably, a plurality of said bored concrete pile holes have a spacing therebetween, and the spacing between adjacent 2 bored concrete pile holes is equal or unequal.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. the utility model has simple structure and convenient use, and can pour the wall protection water into the rotary-drilled cast-in-place pile hole when the cast-in-place pile hole is rotary-drilled, thereby reducing the negative pressure influence formed by the drill bit when the rotary drill is lifted, and simultaneously the backfilled water forms a compensation pressure, thereby ensuring the stability of the hole wall, and solving the problems of difficult rotary drilling and hole collapse of a sandy gravel stratum.
2. The water circulation route formed by pumping water from the recharging well is not discharged to other places, the influence radius of the recharging well is small, and the influence on surrounding structures is small.
3. The wall protection is adopted, other chemical substances, clay, bentonite and other materials are not needed, the influence on the primary environment is small, and the environment is more environment-friendly.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a plurality of bored concrete pile holes with spacing therebetween;
fig. 3 is a schematic view of a plurality of bored concrete pile holes in a meshed state.
Description of reference numerals:
1. the method comprises the following steps of filling pile holes, 2 parts of retaining wall water, 3 parts of a water pump, 4 parts of a recharging well, L1 parts of plain filling soil, L2 parts of a sand layer, L3 parts of a loose sand and pebble layer, L4 parts of a slightly dense sand and pebble layer, L5 parts of a medium dense sand and pebble layer, L6 parts of a dense sand and pebble layer, L7 parts of a strongly weathered mud rock layer, and A parts of an equivalent radius.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
the wall protecting structure for rotary drilling hole formation as shown in fig. 1 is used for rotary drilling hole formation of a sandy gravel stratum and comprises a plurality of cast-in-place pile holes 1, wherein wall protecting water 2 is filled in the cast-in-place pile holes 1;
the sandy gravel stratum is sequentially provided with plain filling soil L1, a sand layer L2, a loose sandy gravel layer L3, a slightly dense sandy gravel layer L4, a medium dense sandy gravel layer L5, a dense sandy gravel layer L6 and a strongly weathered muddy rock layer L7 from top to bottom, and the bottom of the cast-in-place pile hole 1 reaches the strongly weathered muddy rock layer L7;
when a cast-in-place pile hole 1 is dug in a sandy gravel stratum in a rotating mode, wall protection water 2 is poured into the cast-in-place pile hole 1 while the cast-in-place pile hole 1 is dug in a rotating mode, the pressure of the wall protection water 2 in the cast-in-place pile hole 1 is diffused towards the periphery, the wall protection water 2 in the cast-in-place pile hole 1 seeps away from the hole wall of the cast-in-place pile hole 1, and then a water pressure is formed in the cast-in-place pile hole 1, so that the water pressure outside the cast-in-place pile hole 1 is smaller than the water pressure in the cast-in-place pile hole 1, and the wall protection effect is achieved;
the wall protection structure for hole forming by rotary drilling further comprises a recharge well 4 arranged on one side of the cast-in-place pile hole 1, wherein the bottom of the recharge well 4 reaches a dense sand and pebble layer L6 on the ground, and the equivalent radius A covers the cast-in-place pile hole 1;
a water suction pump 3 is arranged at the bottom of the recharging well 4, and the water discharging end of the water suction pump 3 extends into the bored concrete pile hole 1 through a water pipe;
the wall protection water 2 seeping from the bored concrete pile hole 1 enters the recharging well 4, then the water in the recharging well 4 is injected into the bored concrete pile hole 1 through the water suction pump 3, thereby forming an artificial water circulation loop, namely, the water is pumped from the recharging well 4 beside the bored concrete pile hole 1, as the bored concrete pile hole 1 is positioned in the equivalent radius A of the recharging well 4, the wall protection water 2 seeping into the recharging well 4 in the bored concrete pile hole 1 further pumps the water around the bored concrete pile hole 1, a water pressure is formed in the bored concrete pile hole 1, the water pressure outside the bored concrete pile hole 1 is smaller than the water pressure in the bored concrete pile hole 1, thereby realizing the effect of the wall protection, and simultaneously, as the wall protection water 2 seeping into the bored concrete pile hole 1 is recycled nearby, the radius influence range of the recharging well 4 is small, and the peripheral structures are safer.
Preferably, the distance between the recharge well 4 and the cast-in-place pile hole 1 is within the precipitation radius of the recharge well.
In one embodiment, as shown in fig. 3, a plurality of bored concrete pile holes 1 are engaged with each other.
In one embodiment, as shown in fig. 2, there is a spacing between a plurality of bored pile holes 1, and the spacing between adjacent 2 bored pile holes 1 is equidistant or non-equidistant.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A wall protecting structure for rotary drilling hole forming is characterized by being used for rotary drilling hole forming of a sandy gravel stratum and comprising a plurality of cast-in-place pile holes, wherein wall protecting water is filled in the cast-in-place pile holes;
the sand-gravel stratum sequentially comprises plain filling soil, a sand layer, a loose sand-gravel layer, a slightly dense sand-gravel layer, a medium dense sand-gravel layer, a dense sand-gravel layer and a strongly weathered mud-rock stratum from top to bottom, and the bottom of the cast-in-place pile hole reaches the strongly weathered mud-rock stratum.
2. The wall protecting structure for the rotary drilling hole forming is characterized by further comprising a recharge well arranged on one side of the cast-in-place pile hole, wherein the bottom of the recharge well reaches a dense sand gravel layer on the ground, and the cast-in-place pile hole is covered by the recharge well with the equivalent radius;
the bottom of recharging well is equipped with the suction pump, the drainage end of suction pump extends to bored concrete pile downthehole through the water pipe.
3. The wall protecting structure formed by rotary drilling and hole forming according to claim 2, wherein the distance between the recharge well and the cast-in-place pile hole is within the precipitation radius of the recharge well.
4. The wall protecting structure formed by rotary drilling and hole forming according to claim 3, wherein a plurality of cast-in-place pile holes are meshed.
5. The wall protecting structure formed by rotary drilling and hole forming according to claim 3, wherein a plurality of cast-in-place pile holes are spaced, and the spacing between every two adjacent cast-in-place pile holes is equal or unequal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123279087.5U CN216551899U (en) | 2021-12-24 | 2021-12-24 | Dig dado structure of pore-forming soon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123279087.5U CN216551899U (en) | 2021-12-24 | 2021-12-24 | Dig dado structure of pore-forming soon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216551899U true CN216551899U (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123279087.5U Active CN216551899U (en) | 2021-12-24 | 2021-12-24 | Dig dado structure of pore-forming soon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216551899U (en) |
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2021
- 2021-12-24 CN CN202123279087.5U patent/CN216551899U/en active Active
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