CN107794915A - It is adapted to the karst cave treatment method of pile foundation construction in karst area - Google Patents

It is adapted to the karst cave treatment method of pile foundation construction in karst area Download PDF

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Publication number
CN107794915A
CN107794915A CN201710915872.4A CN201710915872A CN107794915A CN 107794915 A CN107794915 A CN 107794915A CN 201710915872 A CN201710915872 A CN 201710915872A CN 107794915 A CN107794915 A CN 107794915A
Authority
CN
China
Prior art keywords
karst
solution cavity
foundation construction
pile foundation
pile
Prior art date
Application number
CN201710915872.4A
Other languages
Chinese (zh)
Inventor
孙海忠
董林兵
Original Assignee
上海市建工设计研究总院有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海市建工设计研究总院有限公司 filed Critical 上海市建工设计研究总院有限公司
Priority to CN201710915872.4A priority Critical patent/CN107794915A/en
Publication of CN107794915A publication Critical patent/CN107794915A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same

Abstract

In order to overcome the adverse effect when karst area carries out pile foundation construction, the cost of pile foundation construction is reduced, simplifies the flow of pile foundation construction, the invention provides the karst cave treatment method of suitable pile foundation construction in karst area.The karst cave treatment method of the suitable pile foundation construction in karst area of the present invention, when pile foundation construction runs into solution cavity, slabstone, clay are squeezed into inside solution cavity, and slabstone, clay are filled up into solution cavity using pile monkey, and precompressed is closely knit.Because slabstone, clay have tamped solution cavity, provide support for pile monkey, now, then are hammered, and pile monkey would not glance off because support is lacked.In addition, pile foundation also will not influence bearing capacity in default of power transmission layer.

Description

It is adapted to the karst cave treatment method of pile foundation construction in karst area

Technical field

The invention belongs to geotechnical engineering design and construction field, is more particularly to adapted at the solution cavity of pile foundation construction in karst area Reason method.

Background technology

The geological condition of karst area is more various and extremely complex, during pile foundation construction, due to the solution cavity of karst area Landform is more, and pile foundation lacks power transmission layer when through hollow solution cavity in the range of solution cavity, easily causes crooked, the slurry of pile monkey The problems such as liquid stream is lost, concrete is superfilled, influences construction quality.

In order to overcome the adverse effect when karst area carries out pile foundation construction, at present, main processing method has slip casting Method, steel pile casting follow-up step etc..Such method is costly, and work progress is complex.

The content of the invention

In order to overcome the adverse effect when karst area carries out pile foundation construction, the cost of pile foundation construction is reduced, simplifies stake The flow of base construction, the invention provides the karst cave treatment method of suitable pile foundation construction in karst area.

Technical scheme is as follows:

A kind of karst cave treatment method of suitable pile foundation construction in karst area, comprises the following steps:

The first step, stake position advance drilling is carried out, finds out solution cavity distribution situation at stake position;

Second step, drilling are crept into Upper Plate of Karst Cave, and drilling is repeated up and down using pile monkey, Upper Plate of Karst Cave is punctured;

3rd step, lifts pile monkey;

4th step, throwing slabstone, clay into drilling, and precompressed is carried out with pile monkey, slabstone, clay are squeezed into solution cavity Portion, fills up solution cavity, and precompressed is closely knit;

5th step, continue to creep into using pile monkey, until breakdown solution cavity bottom plate;

6th step, second step is repeated to the 5th step, until drilling reaches precalculated position;

7th step, carry out borehole cleaning, decentralization steel reinforcement cage, placing concrete.

Beneficial effects of the present invention are as follows:

The karst cave treatment method of the suitable pile foundation construction in karst area of the present invention, when pile foundation construction runs into solution cavity, by piece Stone, clay are squeezed into inside solution cavity, and slabstone, clay are filled up into solution cavity using pile monkey, and precompressed is closely knit.Because slabstone, clay tamp Solution cavity, provides support for pile monkey, now, then is hammered, and pile monkey would not glance off because support is lacked.Separately Outside, pile foundation also will not influence bearing capacity in default of power transmission layer.

Further, in order to ensure to be fully filled inside solution cavity, in the 4th step, throwing slabstone, clay into drilling Absolute altitude is Upper Plate of Karst Cave above 1.5-2.5m.

Further, in order to ensure the stability of drilling, meanwhile, ensure that pile monkey is not blocked in work progress by solution cavity, In second step, the 4th step, the frequency of pile monkey drilling is 3 times/min-6 times/min, stroke 1m-2m.

Further, when pushing up breakdown for hole, prevent pile monkey from being buried by the basement rock to be collapsed at the top of solution cavity, in the 3rd step, carry When playing pile monkey, carry out mending slurry moisturizing.

Further, in order to prevent pile monkey from being blocked by solution cavity, in second step, the 5th step, in breakdown Upper Plate of Karst Cave or solution cavity After bottom plate, the drilling at Upper Plate of Karst Cave or solution cavity bottom plate is repaired using pile monkey.

Further, specifically, the pile monkey is impact drill or suspends drill hammer in midair using hoist engine.

In summary, the karst cave treatment method of suitable pile foundation construction in karst area of the invention, construction quality is stable, pile foundation Pile quality is preferable, so as to ensure that pile quality.

Convenient, the short time limit of present invention construction.In addition to using impact drill, it is not necessary to increase other construction machineries, construct Progress is fast.

Convenient material drawing of the present invention, there is larger economy.Slabstone, clay can gather materials on the spot, and cost is relatively low.

Present invention construction feasibility, workable, the strong adaptability to this place and similar to stratum.

Brief description of the drawings

Fig. 1 is the schematic diagram of the second step of the karst cave treatment method of the suitable pile foundation construction in karst area of the present invention;

Fig. 2 is the schematic diagram of the 3rd step of the karst cave treatment method of the suitable pile foundation construction in karst area of the present invention;

Fig. 3 is the schematic diagram of the 4th step of the karst cave treatment method of the suitable pile foundation construction in karst area of the present invention;

Fig. 4 is the schematic diagram of the 5th step of the karst cave treatment method of the suitable pile foundation construction in karst area of the present invention.

Embodiment

Karst cave treatment below in conjunction with the drawings and specific embodiments to suitable pile foundation construction in karst area proposed by the present invention Method is described in further detail.According to following explanation and claims, advantages and features of the invention will become apparent from.Need Bright, accompanying drawing uses using very simplified form and non-accurately ratio, only to convenience, lucidly aids in illustrating The purpose of the embodiment of the present invention.

Embodiment 1:

Referring to figs. 1 to Fig. 4, the present embodiment provides a kind of karst cave treatment method of suitable pile foundation construction in karst area.

It is adapted to the karst cave treatment method of pile foundation construction in karst area, comprises the following steps:

The first step, stake position advance drilling is carried out, finds out the distribution situation of solution cavity 5 at stake position;

Second step, drilling 1 are crept into the top plate of solution cavity 5, drilling are repeated about 2 using pile monkey, the top plate of solution cavity 5 is hit Wear, once find that mud face declines, SEA LEVEL VARIATION is larger, slip consistency changes or rate of penetration is substantially accelerated in drilling 1 When again phenomena such as unbiased hole, show that pile monkey 2 has passed through the top of solution cavity 5 and entered solution cavity;

3rd step, lift pile monkey 2;

4th step, throwing slabstone, clay 4 into drilling 1, and precompressed is carried out with pile monkey 2, slabstone, clay 4 are squeezed into solution cavity Inside 5, solution cavity 5 is filled up, precompressed is closely knit;

5th step, continue to creep into using pile monkey 2, until the breakdown bottom plate of solution cavity 5;

6th step, second step is repeated to the 5th step, until drilling 1 reaches precalculated position;

7th step, carry out borehole cleaning, decentralization steel reinforcement cage, placing concrete.

The present embodiment has the beneficial effect that:

The karst cave treatment method of the suitable pile foundation construction in karst area of the present embodiment, will when pile foundation construction runs into solution cavity 5 Slabstone, clay 4 are squeezed into inside solution cavity 1, and slabstone, clay 4 are filled up into solution cavity 5 using pile monkey 2, and precompressed is closely knit.Due to slabstone, glue Soil 4 has tamped solution cavity 5, provides support for pile monkey 2, now, then is hammered, and pile monkey 2 would not be sent out because support is lacked Raw deflection.In addition, pile foundation also will not influence bearing capacity in default of power transmission layer.

As preferable embodiment, in order to ensure to be fully filled inside solution cavity 5, in the 4th step, the throwing into drilling 1 Slabstone, the absolute altitude of clay 4 are the top plate above 1.5-2.5m of solution cavity 5.

As preferable embodiment, in order to ensure the stability of drilling, meanwhile, ensure pile monkey 2 in work progress not Blocked by solution cavity 5, in second step, the 4th step, the frequency that pile monkey 2 is crept into is 3 times/min-6 times/min, stroke 1m-2m.

As preferable embodiment, during in order to prevent the breakdown of the hole of solution cavity 5 top, basement rock that pile monkey 2 is collapsed at the top of solution cavity Bury, in the 3rd step, when lifting pile monkey 2, carry out mending slurry moisturizing.

It is molten puncturing in second step, the 5th step in order to prevent pile monkey 2 from being blocked by solution cavity 5 as preferable embodiment After the top plate of hole 5 or the bottom plate of solution cavity 5, the drilling 1 at the top plate of solution cavity 5 or the bottom plate of solution cavity 5 is repaired using pile monkey 2, makes its mellow and full, is easy to The drilling of pile monkey 2.

As preferable embodiment, specifically, the pile monkey 2 is impact drill or suspends impact drill in midair using hoist engine Head.

In addition, as preferable embodiment, in the 4th step, into drilling 1, the size of throwing slabstone is 30cm-50cm, The ratio of slabstone and clay is 3:7.

In addition, as preferable embodiment, in the 3rd step, lift pile monkey 2, when mend slurry moisturizing, mud it is sticky Spend for 19s-28s.

In addition, as preferable embodiment, in the 4th step, in throwing slabstone, clay 4 into drilling 1, with a small amount of more Secondary mode carries out throwing, to ensure that slabstone, clay 4 can fill up solution cavity 5.Consequently, it is possible to slabstone can be more fully by pile monkey 2 Smash, after solution cavity 5 is squeezed into together with clay, retaining wall effect can be played.

Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims Scope.

Claims (6)

1. it is adapted to the karst cave treatment method of pile foundation construction in karst area, it is characterised in that comprise the following steps:
The first step, stake position advance drilling is carried out, finds out solution cavity distribution situation at stake position;
Second step, drilling are crept into Upper Plate of Karst Cave, and drilling is repeated up and down using pile monkey, Upper Plate of Karst Cave is punctured;
3rd step, lifts pile monkey;
4th step, throwing slabstone, clay into drilling, and precompressed is carried out with pile monkey, slabstone, clay are squeezed into inside solution cavity, filled out Full solution cavity, precompressed are closely knit;
5th step, continue to creep into using pile monkey, until breakdown solution cavity bottom plate;
6th step, second step is repeated to the 5th step, until drilling reaches precalculated position;
7th step, carry out borehole cleaning, decentralization steel reinforcement cage, placing concrete.
2. the karst cave treatment method of suitable pile foundation construction in karst area as claimed in claim 1, it is characterised in that the 4th step In, into drilling, throwing slabstone, the absolute altitude of clay are Upper Plate of Karst Cave above 1.5-2.5m.
3. the karst cave treatment method of suitable pile foundation construction in karst area as claimed in claim 1, it is characterised in that second step, In 4th step, the frequency of pile monkey drilling is 3 times/min-6 times/min, stroke 1m-2m.
4. the karst cave treatment method of suitable pile foundation construction in karst area as claimed in claim 1, it is characterised in that the 3rd step In, when lifting pile monkey, carry out mending slurry moisturizing.
5. the karst cave treatment method of suitable pile foundation construction in karst area as claimed in claim 1, it is characterised in that second step, In 5th step, after breakdown Upper Plate of Karst Cave or solution cavity bottom plate, the drilling at Upper Plate of Karst Cave or solution cavity bottom plate is repaired using pile monkey.
6. the karst cave treatment method of suitable pile foundation construction in karst area as claimed in claim 1, it is characterised in that the pile monkey Drill hammer is suspended in midair for impact drill or using hoist engine.
CN201710915872.4A 2017-09-30 2017-09-30 It is adapted to the karst cave treatment method of pile foundation construction in karst area CN107794915A (en)

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CN201710915872.4A CN107794915A (en) 2017-09-30 2017-09-30 It is adapted to the karst cave treatment method of pile foundation construction in karst area

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107938676A (en) * 2017-11-21 2018-04-20 重庆建工市政交通工程有限责任公司 A kind of pile base construction method for passing through full packing type solution cavity
CN108149672A (en) * 2017-12-22 2018-06-12 中交第三航务工程局有限公司宁波分公司 The processing method of underground karst cavity
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
CN110306529A (en) * 2019-06-21 2019-10-08 中国十七冶集团有限公司 A kind of method that bridge pile foundation solution cavity layering throwing blocks
CN110409478A (en) * 2019-07-02 2019-11-05 中国能源建设集团广东省电力设计研究院有限公司 A kind of pile base construction method of karst foundation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103835284A (en) * 2014-02-21 2014-06-04 安徽省公路桥梁工程有限公司 Karst area drilling cast-in-place pile structure and construction method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103835284A (en) * 2014-02-21 2014-06-04 安徽省公路桥梁工程有限公司 Karst area drilling cast-in-place pile structure and construction method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107938676A (en) * 2017-11-21 2018-04-20 重庆建工市政交通工程有限责任公司 A kind of pile base construction method for passing through full packing type solution cavity
CN108149672A (en) * 2017-12-22 2018-06-12 中交第三航务工程局有限公司宁波分公司 The processing method of underground karst cavity
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
CN110306529A (en) * 2019-06-21 2019-10-08 中国十七冶集团有限公司 A kind of method that bridge pile foundation solution cavity layering throwing blocks
CN110409478A (en) * 2019-07-02 2019-11-05 中国能源建设集团广东省电力设计研究院有限公司 A kind of pile base construction method of karst foundation

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Application publication date: 20180313