CN108049395A - A kind of anti-collapse impact holing construction method in complex karst place - Google Patents
A kind of anti-collapse impact holing construction method in complex karst place Download PDFInfo
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- CN108049395A CN108049395A CN201711315383.1A CN201711315383A CN108049395A CN 108049395 A CN108049395 A CN 108049395A CN 201711315383 A CN201711315383 A CN 201711315383A CN 108049395 A CN108049395 A CN 108049395A
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- impact holing
- karst
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to a kind of anti-collapse impact holing construction methods in complex karst place, comprise the following steps：A., punching drilling machine is installed, is equipped with mud pit and mud circulating system；B. steel pile casting is squeezed into, and steel pile casting is reinforced；C. the block stamp of punching drilling machine by small stroke it is low it is urgent hit in a manner of carry out impact holing, and pass through the steel pile casting, mudstone hole wall and the mud circulating system and carry out retaining wall；D. punching is cleared up, and transfers steel reinforcement cage and casting concrete.The anti-collapse impact holing construction method of the present invention causes easy for construction, safety, can realize that the Karst Sites in complicated geology are constructed, while also ensures to rush stake machinery and the safety of operating personnel and the pile quality of pile foundation.
Description
Technical field
The present invention relates to a kind of punching pile construction methods, are applied more particularly to a kind of anti-collapse impact holing in complex karst place
Work method.
Background technology
The design method of pile foundation and construction technology are more ripe at present, but in the complex geologic conditions of cover type karst area,
Pile foundation construction is susceptible to the qualitative problems of construction such as " sliding pile ", " outstanding stake ", " half outstanding stake ", causes pile foundation unstability.Therefore in karst
Before the punching pile driving construction in place, generally first it is in the milk to soil cave and solution cavity and top loose weak soil layer is carried out at reinforcing
Reason, according to the connectedness between the development characteristics of Karst Features, solution cavity scale, charges state, filling situation and solution cavity, by molten
The order starched, got on, get off after first big after small, first outside and then inside, the first concrete in hole, is respectively adopted high pressure pouring element concrete or cement mortar, low
Pressure injection enters neat slurry, mixed clay mortar or cement mortar and waterglass dual slurry, middle pressure injection enter neat slurry or cement mortar and
Waterglass dual slurry is filled the large holes such as solution cavity and solution crack, blocks, and solution cavity filler is reinforced.This rock
Molten grouting strengthening method is more ripe, but for the molten soil cave of no charges, half filling or beading unicom, grouting amount and slip casting
Experience is closely related, molten soil cave need to be filled with, and grouting amount is big, and cost is excessively high for pile foundation engineering, is not achieved optimal
Economic benefit；For reinforcing the processing method of top loose weak soil layer, generally use mixing pile is reinforced；It is deep for existing
The stratum such as thick mud layer and layer of sand need to use large scale equipment and consolidation effect unobvious；Slurry coat method once leaks during pile foundation pore-forming
It turns pale and easily occurs that collapse hole is dangerous, and project cost increases, the construction time lengthens, using being restricted.
To sum up, in the pile foundation engineering of Karst Sites, molten soil cave is filled using grouting or soft layer progress large area is added
Gu processing, quantities is huge, long in time limit, deficiency in economic performance, limits it and is widely applied, therefore active demand one kind is in complexity
The construction method of the anti-collapse impact holing of Karst Sites.
The content of the invention
To solve the above problems, the anti-collapse impact holing construction method in a kind of complex karst place provided by the invention, it can
It realizes that the Karst Sites in complicated geology carry out large-area construction, while also can guarantee the pile quality of pile foundation, and short time limit.
Based on this, a kind of anti-collapse impact holing construction method in complex karst place provided by the invention comprises the following steps：
A., punching drilling machine is installed, is equipped with mud pit and mud circulating system；
B. steel pile casting is squeezed into, and the steel pile casting is reinforced；
C. the block stamp of the punching drilling machine by small stroke it is low it is urgent hit in a manner of carry out impact holing, and pass through described
Steel pile casting, mudstone hole wall and the mud circulating system carry out retaining wall；
When impact holing to solution cavity, by punching into solution cavity the packed mixture of throwing, and by the block stamp with small punching
The low urgent mode hit of journey squeezes packed mixture and forms retaining wall, blocks the solution cavity of connection, is then impacted again by the block stamp
Pore-forming passes through solution cavity；
When there is inclined hole or the block stamp card is hammered into shape, carry out repairing hole processing；
D. punching is cleared up, and transfers steel reinforcement cage and casting concrete.
Further, in stepb, protected by being embedded steel pipe at the top periphery of the steel pile casting with reinforcing the steel
Cylinder.
Further, in step b, the steel pile casting throws projected depth by the way of vibration hammer vibration-sunk.
Further, the steel pile casting wall thickness is 15~20mm, length is 6~8m, and described in the steel pile casting internal diameter ratio
Percussion Piles diameter is big.
Further, in step c, when near the block stamp punching to Upper Plate of Karst Cave, mud balance is increased, and is passed through
The block stamp by small stroke it is low it is urgent hit in a manner of, gradually Upper Plate of Karst Cave is punctured.
Further, the packed mixture is the mixture for including slabstone, clay and cement.
Further, the ratio of the slabstone, the clay and the cement is 6:3:1.
Further, in step c, when impact holing mud loss occurs to solution cavity, the block stamp, throwing institute are promoted
It states packed mixture and accumulation height will at least be higher by the 1.5~2m of Upper Plate of Karst Cave, then tighten the steel wire of the punching drilling machine
Rope, and the block stamp using small stroke it is low it is urgent hit by way of form the mudstone hole wall guard aperture.
Further, in step c, when there is the inclined hole or the block stamp card is hammered into shape, slabstone and accumulation described in throwing
Height to be at least higher by the inclined hole or card hammer position 0.5m, and the block stamp using it is low it is urgent hit by way of carry out repairing hole
Processing.
Further, the slabstone specification is 100mm × (300~500mm) × (300~500mm).
Implement the embodiment of the present invention, have the advantages that：
1st, the anti-collapse impact holing construction method in complex karst place of the invention, by using steel pile casting retaining wall, and uses
The low urgent mode impact holing hit of small stroke and utilize mud off pore-forming, can realize Karst Sites in complicated geology into
Row construction, while also ensure and rush stake machinery and the safety of operating personnel and the pile quality of pile foundation, in addition when Percussion Piles pour
After the completion of building, steel pile casting, which can be extracted, realizes recycling.
2nd, lapies, fluid bowl and steep scar are carried out using throwing slabstone and small stroke low urgent striking repairing hole processing, it can
It avoids card hammer occurring or into the inclined risk of Percussion Piles, reduces the fullness coefficient for rushing stake, accelerate construction progress, also ensure simultaneously
The quality and construction safety of Percussion Piles.
3rd, when spillage phenomenon occurs in impact holing to solution cavity, using by 6:3:1 ratio throwing slabstone+clay+cement
Packed mixture blocks solution cavity, you can prevents mud loss, and can block the communication passage between solution cavity, avoids pouring mixed
There is concrete during solidifying soil to flow in the solution cavity of perforation, save project cost.
Description of the drawings
Fig. 1 is the anti-collapse impact holing construction method schematic diagram in complex karst place described in the embodiment of the present invention.
Fig. 2 is that punching pile driving construction when running into clint, olecranon rock or scar out-of-flatness position described in the embodiment of the present invention shows
It is intended to.
Fig. 3 is the schematic diagram when impact holing to Upper Plate of Karst Cave described in the embodiment of the present invention.
Fig. 4 is not install steel pile casting and installation steel shield described in the embodiment of the present invention in mud loss or collapse hole
The punching pile driving construction control schematic diagram of cylinder.
Fig. 5 is punching pile driving construction schematic diagram when running into mud loss or collapse hole situation described in the embodiment of the present invention.
Reference sign：
Wherein, 1, punching drilling machine, 2, steel wire rope, 3, block stamp, 4, mud pit, 41, mud circulating system, 5, steel pipe, 6, steel
Casing, 7, mud, 8, perfusion pile body, 9, punching scope line, 10, clint, olecranon rock or scar out-of-flatness position, 11, slabstone,
12nd, mud loss, 13, collapse hole, 14, the anti-collapse hole of steel pile casting retaining wall, 15, packed mixture.
Specific embodiment
Below in conjunction with the drawings and examples in the present invention, technical scheme is clearly and completely retouched
It states, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, belongs to protection scope of the present invention.
With reference to shown in Fig. 1, a kind of anti-collapse impact holing construction method in complex karst place described in the embodiment of the present invention, including
Following steps：
A., punching drilling machine 1 is installed, is equipped with mud pit 4 and mud circulating system 41；
B. steel pile casting 6 is squeezed into, and steel pile casting 6 is reinforced；
C. the block stamp 3 of punching drilling machine 1 by small stroke it is low it is urgent hit in a manner of carry out impact holing, and pass through steel pile casting
6th, mudstone hole wall and mud circulating system 41 carry out retaining wall；
When impact holing to solution cavity, by punching into solution cavity the packed mixture 15 of throwing, and by block stamp 3 with small stroke
The low urgent mode hit squeezes packed mixture 15 and forms retaining wall, blocks the solution cavity of connection, then passes through 3 impact holing of block stamp again
Through solution cavity；
When there is the inclined hole or the card hammer of block stamp 3, carry out repairing hole processing；
D. punching is cleared up, and transfers steel reinforcement cage and casting concrete.
Be based on more than construction method, the anti-collapse impact holing construction method of the present embodiment by using 6 retaining wall of steel pile casting, and
Using small stroke it is low it is urgent hit by the way of impact holing and utilize 7 retaining wall pore-forming of mud so that it is easy for construction, safety, Neng Goushi
The construction of stake is punched out in the environment of the complicated geologies such as present karsts developing area, solution cavity and big, the mollisol thickness of soil cave scale, is protected
The safety for rushing stake machinery and operating personnel has been demonstrate,proved, and has ensured the pile quality of pile foundation, while after the completion of the Percussion Piles pour,
Steel pile casting 6, which can be extracted, realizes recycling, can also retain steel pile casting 6 to enhance the anti-pressure ability of the Percussion Piles, saves
Cost obtains optimum economic benefit.
Specifically, when foundation pile impact holing is constructed, understand stake position advance drilling data in detail first, matched somebody with somebody according to arrangement and method for construction
Premium mud 7 processed, reasonable Arrangement mud pit 4, and install mud circulating system 41, preparation filling solution cavity or anti-collapse hole it is emergent
Material.Then the length of steel pile casting 6 is determined according to advance drilling data, using the stringent mode of operation of vibration hammer vibration-sunk steel
Casing 6 throws projected depth into, and multiple fixing pieces are installed at the top periphery of steel pile casting 6, and the fixing piece is steel
Pipe 5,5 a diameter of 45~50mm of steel pipe, thickness are 2~4mm, length is 3~5m, wherein it is preferred that 4 a diameter of 48mm, thickness are
3mm, the steel pipe 5 that length is 4m are reinforced, and are prevented from falling, tilt or shifting under steel pile casting 6 during impact holing, finally be made
It obtains on the aperture ground after steel pipe 5 lies against leveling hardening；Or welding spreading is carried out to steel pile casting 6 according to on-site actual situations
Processing, is operated by the way of steel pile casting 6 is squeezed into punching, steel pile casting 6 is generally required to enter silty through layer of sand and is glued
1~2m of property soil layer is advisable.And then pile is carried out to solution cavity top using the pile mode of 1 punching of punching drilling machine, 7 retaining wall of mud
Operation；In the range of solution cavity impact holing construct when, forbid using big stroke impact, steel wire rope 2 should be tightened, using small stroke into
Row it is low it is urgent hit, gradually Upper Plate of Karst Cave is punctured, avoids the impact of big stroke once breakdown Upper Plate of Karst Cave can cause 7 transient flow of mud
It loses and construction risk occurs.In addition, when passing through solution cavity, the situation of steel wire rope 2 is also kept a close eye on, to judge whether tiltedly
Hole must carry out repairing hole processing in time using throwing slabstone 11 if there is the inclined hole.In solution cavity position during pore-forming, if occurring
Spillage or other abnormal conditions promote block stamp 3 to aperture, throwing slabstone 11 or packed mixture 15 to form mudstone hole wall at once
Guard aperture to prevent there is 13 phenomenon of collapse hole, then using small stroke punching pore-forming, finally starts borehole cleaning, steel is transferred after the completion of borehole cleaning
Muscle cage and casting concrete extract retaining wall steel pile casting 6 or retain steel pile casting 6 in punching scope line 9 after initial set to be achieved.
Wherein, the wall thickness of steel pile casting 6 is 15~20mm, length is 6~8m, and the internal diameter of steel pile casting 6 is than the Percussion Piles
Outer diameter it is big, generally about 3mm, you can meet the requirement that collapses of protection loose soil bed, and can facilitate and extract steel pile casting 6 and realize weight
It is multiple to utilize；Meanwhile multiple hanging rings are set in 6 outside of steel pile casting or are provided with multiple lifting hole(eyelet)s, later stage extraction steel pile casting 6 is also convenient for, it is real
Now reuse.In the present embodiment, the mud 7 in mud pit 4 includes bentonite, carboxymethyl cellulose, caustic soda and water, and described
Bentonite, the carboxymethyl cellulose, the ratio of the caustic soda and the water are 1：10%：0.03%~0.05%：0.4%~
0.5%, wherein carboxymethyl cellulose (CMC) and caustic soda (Na2CO3), it each serves as the viscosity of increase mud 7 and increases bentonite
The effect of the negative electrical charge of particle surface absorption, finally qualified bentonite is put into slurry mixer and be sufficiently stirred 6~
8min, be incorporated to pond storage 24 it is small when more than be allowed to abundant aquation, you can be delivered for use.
Wherein, if the contaminated rear property deterioration of mud 7, reusable after processing.Mud purification recycling, which can be used, shakes
The methods of dynamic sieve, cyclone, chute and sedimentation basin (coagulative precipitation) or forced dehydration.Mud conditioning uses mechanical treatment and gravity
Precipitation process is combined progress, and the mud cemented out from impact opening flows into sedimentation basin progress gravity after mechanical treatment and sinks
It forms sediment, after gravity precipitation 16 is stablized when small, takes the thin part pulp-water in surface away to filtering ponds with water pump, and pass through four layers of strainer mistake
Filter, waste water is exhausted, remaining slurry regeneration recycling.It is difficult to handle or gives up if handling uneconomical person as seriously polluted.
With reference to shown in Fig. 2, in order to avoid there is the danger of the inclined hole or card hammer, steel wire rope 2 should be tightened, block stamp 3 is adopted
With small stroke carry out it is low it is urgent hit, forbid using big stroke impact.And if block stamp 3 runs into clint, olecranon rock or scar injustice
During whole position 10, the inclined hole or card hammer phenomenon are susceptible to, then tightens steel wire rope 2, throwing slabstone 11 and accumulation height at least
Be higher by the inclined hole or card hammer position 0.5m, and block stamp 3 using it is low it is urgent hit by way of repair hole and handle, at leisure
Steeply inclined scar is accomplished into horizontal bench, until entirely constructing contact surface just to terminate to repair hole operation during homogeneous scar, ensures block stamp 3
Work surface even intensity, wherein 11 specification of slabstone be 100mm × 300~500mm × 300~500mm, be effectively guaranteed institute
The quality of Percussion Piles is stated, avoids the generation again of the inclined hole and card hammer phenomenon.
With reference to shown in Fig. 3 and Fig. 4, when impact holing to the Upper Plate of Karst Cave 1m or so, mud loss 12 is susceptible to
Situation, embody the importance of steel pile casting 6 herein, if 8 top of perfusion pile body does not use steel pile casting 6, lose mud 7 and protect
13 phenomenon of collapse hole will occur for loose soil bed, layer of sand or the mud of wall so that block stamp can then occur for upper soil horizon and surface collapse
3 are embedded in a bottom or punching drilling machine 1 topples and danger or even engineering safety accident occurs, then in requisition for re-starting punching
Pile, operating expenses increase, pile quality are difficult to ensure that；Even if above-mentioned security incident does not occur after there is collapse hole 13 but, then
The fullness coefficient of casting concrete can also increase at this time so that construction cost is high；If 8 top of pile body is perfused using steel pile casting 6,
Then in the case of 6 retaining wall of steel pile casting, the anti-collapse hole 14 of steel pile casting retaining wall is formed, then can greatly reduce and the general of collapse hole 13 occur
Rate ensures the quality of the Percussion Piles.
With reference to shown in Fig. 5, when there is 12 situation of mud loss, then block stamp 3 is promoted to aperture, according still further to 6:3:1 ratio
The packed mixture 15 of example throwing slabstone 11, clay and cement forms mudstone hole wall guard aperture, and accumulates packed mixture 15
Height will at least be higher by 1.5~2m of the Upper Plate of Karst Cave, so that mud face no longer declines in stable state, then tighten
Steel wire rope 2 is squeezed using small stroke tip-tap and blocks solution cavity internal channel, forms mudstone hole wall guard aperture.Wherein 11 specification of slabstone is
100mm × 300~500mm × 300~500mm, so operate repeatedly, until no longer spillage, are then rushed again by block stamp 3
Solution cavity is simultaneously smoothly passed through in hole.
To sum up, the anti-collapse impact holing construction method in the complex karst place that above-described embodiment is provided, by using steel
6 retaining wall of casing, and using small stroke it is low it is urgent hit by the way of impact holing and utilize 7 retaining wall pore-forming of mud, can realize on ground
The Karst Sites of matter complexity are constructed, while also ensure to rush stake machinery and the safety of operating personnel and the pile matter of pile foundation
Amount avoids the occurrence of the inclined hole, blocks the phenomenon that hammer or mud loss 12.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these improve and replace
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of anti-collapse impact holing construction method in complex karst place, which is characterized in that comprise the following steps：
A., punching drilling machine is installed, is equipped with mud pit and mud circulating system；
B. steel pile casting is squeezed into, and the steel pile casting is reinforced；
C. the block stamp of the punching drilling machine by small stroke it is low it is urgent hit in a manner of carry out impact holing, and pass through the steel and protect
Cylinder, mudstone hole wall and the mud circulating system carry out retaining wall；
When impact holing to solution cavity, by punching into solution cavity the packed mixture of throwing, it is and the block stamp is low with small stroke
The urgent mode hit squeezes packed mixture and forms retaining wall, blocks the solution cavity of connection, then passes through the block stamp impact holing again
Through solution cavity；
When there is inclined hole or the block stamp card is hammered into shape, carry out repairing hole processing；
D. punching is cleared up, and transfers steel reinforcement cage and casting concrete.
2. the anti-collapse impact holing construction method in complex karst place as described in claim 1, which is characterized in that in stepb,
By being embedded steel pipe at the top periphery of the steel pile casting to reinforce the steel pile casting.
3. the anti-collapse impact holing construction method in complex karst place as described in claim 1, which is characterized in that in step b, institute
It states steel pile casting and throws projected depth by the way of vibration hammer vibration-sunk.
4. the anti-collapse impact holing construction method in complex karst place as described in claim 1, which is characterized in that the steel pile casting
Wall thickness is 15~20mm, length is 6~8m, and the steel pile casting internal diameter is bigger than the Percussion Piles diameter.
5. the anti-collapse impact holing construction method in complex karst place according to claim 1, which is characterized in that in step c
In, when near the block stamp punching to Upper Plate of Karst Cave, mud balance is increased, and passes through the block stamp and urgent is hit so that small stroke is low
Mode, gradually Upper Plate of Karst Cave is punctured.
6. the anti-collapse impact holing construction method in complex karst place as described in claim 1, which is characterized in that described packed mixed
It is the mixture for including slabstone, clay and cement to close material.
7. the anti-collapse impact holing construction method in complex karst place as claimed in claim 6, which is characterized in that the slabstone,
The ratio of the clay and the cement is 6:3:1.
8. the anti-collapse impact holing construction method in complex karst place according to claim 1, which is characterized in that in step c
In, when impact holing mud loss occurs to solution cavity, promote the block stamp, packed mixture described in throwing and accumulation height extremely
1.5~the 2m of Upper Plate of Karst Cave is higher by less, then tightens the steel wire rope of the punching drilling machine, and small punching is used by the block stamp
The low urgent mode hit of journey forms the mudstone hole wall guard aperture.
9. the anti-collapse impact holing construction method in complex karst place according to claim 1, which is characterized in that in step c
In, when there is the inclined hole or the block stamp card and hammering into shape, slabstone described in throwing and accumulation height to be at least higher by the inclined hole or
Card hammer position 0.5m, and the block stamp using it is low it is urgent hit by way of repair hole and handle.
10. the anti-collapse impact holing construction method in complex karst place according to claim 9, which is characterized in that described
Stone specification is 100mm × (300~500mm) × (300~500mm).
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| CN108978642A (en) * | 2018-06-28 | 2018-12-11 | 广州市恒盛建设工程有限公司 | A kind of double steel pile castings add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method |
| CN109113051A (en) * | 2018-09-30 | 2019-01-01 | 中交第三航务工程局有限公司 | The method of bored pile construction work efficiency is improved under the conditions of karsts developing area |
| CN109518677A (en) * | 2018-11-26 | 2019-03-26 | 五冶集团上海有限公司 | Punching Borehole Cast-in-place Concrete Pile karst cave treatment method |
| CN109629560A (en) * | 2018-11-22 | 2019-04-16 | 温州正建设有限公司 | A kind of cast-in-place pile construction method |
| CN110055948A (en) * | 2019-04-29 | 2019-07-26 | 华东交通大学 | A kind of big Treatment Methods of Karst Foundation of depth and device |
| CN111910634A (en) * | 2020-07-27 | 2020-11-10 | 中国建筑第二工程局有限公司 | Karst geological impact pore-forming construction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978642A (en) * | 2018-06-28 | 2018-12-11 | 广州市恒盛建设工程有限公司 | A kind of double steel pile castings add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method |
| CN109113051A (en) * | 2018-09-30 | 2019-01-01 | 中交第三航务工程局有限公司 | The method of bored pile construction work efficiency is improved under the conditions of karsts developing area |
| CN109629560A (en) * | 2018-11-22 | 2019-04-16 | 温州正建设有限公司 | A kind of cast-in-place pile construction method |
| CN109518677A (en) * | 2018-11-26 | 2019-03-26 | 五冶集团上海有限公司 | Punching Borehole Cast-in-place Concrete Pile karst cave treatment method |
| CN110055948A (en) * | 2019-04-29 | 2019-07-26 | 华东交通大学 | A kind of big Treatment Methods of Karst Foundation of depth and device |
| CN111910634A (en) * | 2020-07-27 | 2020-11-10 | 中国建筑第二工程局有限公司 | Karst geological impact pore-forming construction method |
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