CN111058451A - Pile foundation gunny bag slurry wrapping, water plugging, hole filling and wall building method - Google Patents

Pile foundation gunny bag slurry wrapping, water plugging, hole filling and wall building method Download PDF

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Publication number
CN111058451A
CN111058451A CN201911242143.2A CN201911242143A CN111058451A CN 111058451 A CN111058451 A CN 111058451A CN 201911242143 A CN201911242143 A CN 201911242143A CN 111058451 A CN111058451 A CN 111058451A
Authority
CN
China
Prior art keywords
concrete
gunny bag
pile
pile hole
drilling
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201911242143.2A
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Chinese (zh)
Inventor
凌志云
李绍石
许爱霞
周振杰
苏庆梅
吕淮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangxi Construction Engineering Group Third Construction Engineering Co
Original Assignee
Guangxi Construction Engineering Group Third Construction Engineering Co
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 Guangxi Construction Engineering Group Third Construction Engineering Co filed Critical Guangxi Construction Engineering Group Third Construction Engineering Co
Priority to CN201911242143.2A priority Critical patent/CN111058451A/en
Publication of CN111058451A publication Critical patent/CN111058451A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • 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

The invention relates to a method for pile foundation gunny bag slurry wrapping, water plugging, hole filling and wall building, which comprises the following steps: drilling a pile hole: when meeting large underground water flow or large karst cave in the process of drilling the pile hole, continuously drilling downwards to a position 500mm below the bottom of the karst cave, and measuring the depth and the diameter of the drilled pile hole; (II) manufacturing a gunny bag: manufacturing a gunny bag with an open upper end and a closed bottom end by adopting flexible gunny bag cloth; thirdly, placing the sack into the pile hole, turning over the sack mouth to cover the pile mouth and pressing firmly; fourthly, pouring backfill concrete into the gunny bag, wherein the pouring height of the concrete is 1000mm higher than the top of the karst cave; (V) extruding concrete: a drill bit of a drilling machine is extended into the gunny bag, the concrete in the gunny bag is repeatedly extruded downwards, the concrete is extruded and then protrudes out of one side of the gunny bag to enter the karst cave, and the karst cave is tightly sealed after the concrete is solidified; (VI) drilling and wall building: and (5) continuously drilling a pile hole from the surface of the solidified concrete to the designed pile bottom elevation at the position of the pile hole drilled in the step (I), so as to form a concrete hole wall.

Description

Pile foundation gunny bag slurry wrapping, water plugging, hole filling and wall building method
Technical Field
The invention relates to the technical field of building construction, in particular to a method for blocking water, filling holes and building walls of a pile foundation.
Background
The cast-in-situ bored pile is a pile formed by forming a pile hole in foundation soil in a mechanical drilling mode on an engineering site, placing a reinforcement cage in the pile hole and pouring concrete. The cast-in-situ bored pile is widely used in high-rise buildings, foundation treatment and reinforcement and slope support in the field of buildings. When drilling and pouring concrete, the bored pile usually adopts backfilling rubbles, clay or concrete to block the hole or adopts a steel casing to form the hole when encountering karst cave and underground water, and the following defects exist in the conventional methods:
1. backfilling rubbles and clay, and plugging the small karst cave without underground water by extruding to form a slurry retaining wall, wherein the karst cave can be plugged, but when the underground water and the karst cave are larger, the clay and the rubbles cannot play a role in plugging, and the slurry retaining wall fails;
2. the backfilling concrete method, block the karst cave through backfilling the concrete, bore hole again after the concrete reaches certain intensity, form the concrete dado in the karst cave, this method is suitable for the little situation of the underground water flow, but meet the big water flow, big karst cave, the backfilling concrete is washed away by water, can't block the karst cave, and waste material and manpower;
3. the steel casing method is adopted: under the condition of underground water, the holes can be formed, but when the holes meet karst caves, the pile diameter is increased, and the steel casing is placed, so that the pile core concrete, the steel casing material and the labor cost are increased.
Disclosure of Invention
The invention aims to solve the problem that the prior art cannot solve, and provides a pile foundation gunny bag slurry wrapping water plugging and hole filling wall building method.
The technical scheme adopted by the invention for realizing the purpose is as follows: the pile foundation sack slurry-wrapping water-plugging hole-filling wall-building method includes the following steps: drilling a pile hole: when meeting large underground water flow or large karst cave in the process of drilling the pile hole, continuously drilling downwards to a position 500mm below the bottom of the karst cave, and measuring the depth and the diameter of the drilled pile hole; (II) manufacturing a gunny bag: manufacturing a cylindrical gunny bag with an opening at the upper end and a closed bottom end by adopting flexible gunny bag cloth, wherein the diameter of the gunny bag is the diameter of a pile hole plus 500mm, and the length of the gunny bag is the pile hole plus 500 mm; (III) placing the gunny bag into the pile hole: wrapping the sack on a conduit for pouring concrete, slowly putting the conduit and the sack into the pile hole together, drawing the conduit out and leaving the sack in the pile hole when the conduit touches the bottom wall of the pile hole, and then turning over and covering the sack opening on the edge of the pile opening and firmly pressing; and (IV) pouring backfilled concrete into the gunny bag: adopting a vertical lifting guide pipe to pour backfill concrete into the gunny bag, wherein the pouring height of the concrete is 1000mm higher than the top of the karst cave; (V) extruding concrete: a drill bit of a drilling machine is extended into the gunny bag, the concrete in the gunny bag is repeatedly extruded downwards, the concrete is extruded in the gunny bag and then protrudes out of one side of the gunny bag to enter the karst cave, and the karst cave is tightly sealed after the concrete is solidified; (VI) drilling and wall building: and (5) continuously drilling a pile hole downwards from the surface of the solidified concrete at the position of the pile hole drilled in the step (I), plugging the concrete at the original karst cave opening by the concrete wrapped by the gunny bag to form a concrete retaining wall, and continuously drilling the pile hole downwards by the drilling machine to reach the designed pile bottom elevation.
The pile foundation gunny bag slurry wrapping, water plugging, hole filling and wall building method has the following beneficial effects: aiming at the situation that a bored pile can not be formed by a traditional method when meeting large water flow and a large karst cave in the drilling process, a cylindrical sack with a bottom is made by utilizing flexible sack cloth and is put into a hole, concrete is filled in the sack, then the concrete is extruded, the wrapping property of the sack is utilized to prevent the concrete from being washed away by the water flow, the aim of blocking the karst cave is realized, a reliable concrete retaining wall is formed at the karst cave after the concrete is solidified and is drilled again, and the construction problem that the bored pile is difficult to form the hole when meeting the large water flow and the large karst cave can be solved; the method has the advantages of simple process, reliable method, material and mechanical labor cost saving, high construction efficiency and good popularization value.
The method for plugging water and repairing the hole and building the wall by wrapping the slurry in the pile foundation sack is further described by combining the attached drawings and the embodiment.
Drawings
FIG. 1 is a schematic structural diagram of a gunny bag adopted in the pile foundation gunny bag slurry-wrapping water-plugging hole-filling wall-building method;
FIG. 2 is a schematic structural diagram of a pile hole drilled in the step (I) of the pile foundation gunny bag slurry-wrapping water-plugging hole-filling wall-building method;
FIG. 3 is a schematic view of the placement of a sack into the stake hole of FIG. 2;
FIG. 4 is a schematic view of the construction after backfilling concrete is poured into the sack and the concrete is squeezed;
FIG. 5 is a schematic structural view of the pile hole being drilled further down after the backfill concrete sets;
the reference numbers illustrate: 1-pile hole, 2-karst cave, 3-gunny bag, 4-concrete and 5-water flow.
Detailed Description
As shown in fig. 1 to 5, the method for pile foundation gunny bag slurry wrapping, water plugging, hole filling and wall building comprises the following steps: drilling a pile hole: drilling a pile hole at a preset position according to a designed size, and when meeting with large underground water flow or a large karst cave in the pile hole drilling process, continuing to drill downwards to a position 500mm below the bottom of the karst cave, and measuring the depth H and the diameter D of the drilled pile hole as shown in figure 2, wherein the large underground water flow means that the concrete is backfilled at the karst cave position by adopting a backfilling concrete method, and the backfilled concrete is washed away by water without solidification; (II) manufacturing a gunny bag: a cylindrical sack with an open upper end and a closed bottom end is manufactured by adopting flexible sack cloth, as shown in figure 1, the diameter of the sack is the diameter D of a pile hole plus 500mm, and the length of the sack is the depth H of the pile hole plus 500mm, and as a conversion form of the invention, the sack can also be manufactured by adopting other flexible materials with better toughness, such as a canvas bag manufactured by canvas; (III) placing the gunny bag into the stake hole, as shown in figure 3: wrapping the sack on a conduit (not shown in the figure) for pouring concrete, slowly putting the conduit and the sack into the pile hole together, drawing out the conduit and leaving the sack in the pile hole when the conduit touches the bottom wall of the pile hole, and then turning over and covering the sack opening on the edge of the pile opening and firmly pressing; and (IV) pouring backfilled concrete into the gunny bag: the vertical lifting guide pipe method is adopted to pour the backfill concrete into the gunny bag, the pouring height of the concrete is 1000mm higher than the top of the karst cave, and the concrete pouring by the vertical lifting guide pipe method is the prior art and is not described in detail herein; (V) extruding concrete: a drill bit of a drilling machine is used for extending into the jute bag, the concrete in the jute bag is repeatedly extruded downwards, the concrete is extruded in the jute bag and then protrudes out of one side of the jute bag to enter a karst cave (as shown in figure 4), the karst cave is positioned on one side of a pile hole because the concrete can move to an open position after being extruded in the jute bag, the concrete can naturally protrude out of one side of the jute bag to enter the karst cave after being extruded in the jute bag to block the karst cave, the concrete cannot be washed away by water flow because the concrete is wrapped by the jute bag, and the karst cave is tightly blocked after the concrete is solidified; (VI) drilling and wall building: and (3) continuously drilling a pile hole downwards from the surface of the solidified concrete at the position of the pile hole drilled in the step (I), plugging the concrete wrapped by the gunny bag at the original karst cave opening to form a concrete retaining wall, and continuously drilling the pile hole downwards to the designed pile bottom elevation (as shown in figure 5) by using a drilling machine, so that the construction problem that the hole cannot be formed due to concrete loss caused by large water flow and large karst cave is solved.
The above embodiments are only preferred embodiments of the present invention, and the structure of the present invention is not limited to the forms of the above embodiments, and any modifications, equivalents and the like within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. The pile foundation gunny bag slurry wrapping, water plugging, hole filling and wall building method is characterized by comprising the following steps of: drilling a pile hole: when meeting large underground water flow or large karst cave in the process of drilling the pile hole, continuously drilling downwards to a position 500mm below the bottom of the karst cave, and measuring the depth and the diameter of the drilled pile hole; (II) manufacturing a gunny bag: manufacturing a cylindrical gunny bag with an opening at the upper end and a closed bottom end by adopting flexible gunny bag cloth, wherein the diameter of the gunny bag is the diameter of a pile hole plus 500mm, and the length of the gunny bag is the pile hole plus 500 mm; (III) placing the gunny bag into the pile hole: wrapping the sack on a conduit for pouring concrete, slowly putting the conduit and the sack into the pile hole together, drawing the conduit out and leaving the sack in the pile hole when the conduit touches the bottom wall of the pile hole, and then turning over and covering the sack opening on the edge of the pile opening and firmly pressing; and (IV) pouring backfilled concrete into the gunny bag: adopting a vertical lifting guide pipe to pour backfill concrete into the gunny bag, wherein the pouring height of the concrete is 1000mm higher than the top of the karst cave; (V) extruding concrete: a drill bit of a drilling machine is extended into the gunny bag, the concrete in the gunny bag is repeatedly extruded downwards, the concrete is extruded in the gunny bag and then protrudes out of one side of the gunny bag to enter the karst cave, and the karst cave is tightly sealed after the concrete is solidified; (VI) drilling and wall building: and (5) continuously drilling a pile hole downwards from the surface of the solidified concrete at the position of the pile hole drilled in the step (I), plugging the concrete at the original karst cave opening by the concrete wrapped by the gunny bag to form a concrete retaining wall, and continuously drilling the pile hole downwards by the drilling machine to reach the designed pile bottom elevation.
CN201911242143.2A 2019-12-06 2019-12-06 Pile foundation gunny bag slurry wrapping, water plugging, hole filling and wall building method Pending CN111058451A (en)

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Application Number Priority Date Filing Date Title
CN201911242143.2A CN111058451A (en) 2019-12-06 2019-12-06 Pile foundation gunny bag slurry wrapping, water plugging, hole filling and wall building method

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Application Number Priority Date Filing Date Title
CN201911242143.2A CN111058451A (en) 2019-12-06 2019-12-06 Pile foundation gunny bag slurry wrapping, water plugging, hole filling and wall building method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111561262A (en) * 2020-05-29 2020-08-21 贵州建工集团第一建筑工程有限责任公司 Hole forming method of rotary drilling rig for large-size pile hole in karst area

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102852140A (en) * 2012-10-10 2013-01-02 东华理工大学 Curtain type cave filling pile construction method and elastic mesh cloth
JP2016031010A (en) * 2014-07-30 2016-03-07 鹿島建設株式会社 Urethane foam filling method, filling pipe unit and urethane foam filling structure
CN109706932A (en) * 2018-12-03 2019-05-03 中国电建集团贵阳勘测设计研究院有限公司 A kind of solution cavity stopper structure and construction method
CN110205985A (en) * 2019-06-05 2019-09-06 西京学院 A kind of karst device for plugging
CN110230309A (en) * 2019-01-24 2019-09-13 中建新疆建工土木工程有限公司 Karst region bridge solution cavity pile base construction method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102852140A (en) * 2012-10-10 2013-01-02 东华理工大学 Curtain type cave filling pile construction method and elastic mesh cloth
JP2016031010A (en) * 2014-07-30 2016-03-07 鹿島建設株式会社 Urethane foam filling method, filling pipe unit and urethane foam filling structure
CN109706932A (en) * 2018-12-03 2019-05-03 中国电建集团贵阳勘测设计研究院有限公司 A kind of solution cavity stopper structure and construction method
CN110230309A (en) * 2019-01-24 2019-09-13 中建新疆建工土木工程有限公司 Karst region bridge solution cavity pile base construction method
CN110205985A (en) * 2019-06-05 2019-09-06 西京学院 A kind of karst device for plugging

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111561262A (en) * 2020-05-29 2020-08-21 贵州建工集团第一建筑工程有限责任公司 Hole forming method of rotary drilling rig for large-size pile hole in karst area

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