CN115559299A - Pre-hole forming method for foundation concrete cushion pile foundation - Google Patents
Pre-hole forming method for foundation concrete cushion pile foundation Download PDFInfo
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- CN115559299A CN115559299A CN202211469997.6A CN202211469997A CN115559299A CN 115559299 A CN115559299 A CN 115559299A CN 202211469997 A CN202211469997 A CN 202211469997A CN 115559299 A CN115559299 A CN 115559299A
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- foundation
- pile foundation
- bamboo plywood
- circular
- concrete
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 53
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 53
- 241001330002 Bambuseae Species 0.000 claims abstract description 53
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 53
- 239000011425 bamboo Substances 0.000 claims abstract description 53
- 239000011120 plywood Substances 0.000 claims abstract description 53
- 238000009415 formwork Methods 0.000 claims abstract description 50
- 238000005553 drilling Methods 0.000 claims abstract description 22
- 238000010276 construction Methods 0.000 claims abstract description 15
- 239000011435 rock Substances 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 11
- 239000004570 mortar (masonry) Substances 0.000 claims description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims 1
- 239000002893 slag Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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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
- E02D5/66—Mould-pipes or other moulds
- E02D5/68—Mould-pipes or other moulds for making bulkheads or elements thereof
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/02—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers specially adapted for placing or removing bulkheads
-
- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
Abstract
A pre-hole forming method for a foundation concrete cushion pile foundation comprises the following steps: s1, excavating a foundation to a bottom elevation of a foundation concrete cushion; s2, measuring design point positions of positioning pile holes, and erecting a circular pile foundation bamboo plywood formwork; s3, pouring the concrete cushion layer foundation layer by layer to a designed elevation; s4, dismantling the circular pile foundation bamboo plywood formwork and rechecking the pile hole position; s5: the method has the advantages that a drilling machine is arranged to drill towards the base to the designed depth, the difficult problem that the space is narrow, the pile is formed firstly and then the slag is removed is solved, the operability and the safety are high, the construction cost of drilling after the foundation concrete is directly poured firstly is effectively reduced, the construction efficiency is improved, and the quality is guaranteed.
Description
Technical Field
The invention relates to the technical field of pile foundation hole construction, in particular to a pre-hole forming method for a pile foundation of a foundation concrete cushion layer.
Background
In the field of pile foundation construction, multiple construction modes exist, a plain concrete base layer and a pile foundation are one of the two, when the space in a construction area is narrow by adopting the construction process, a series of problems can be faced, taking a big connecting bay submarine tunnel north bank sheet wall as an example, the space in the construction area is narrow and small, and the pile is an intensive pile group.
Disclosure of Invention
The invention provides a method for pre-drilling a pile foundation of a foundation concrete cushion layer to solve the problems.
The technical scheme adopted by the invention is as follows:
a pre-hole forming method for a foundation concrete cushion pile foundation comprises the following steps:
s1, excavating a foundation to a bottom elevation of a foundation concrete cushion layer: firstly, excavating a foundation to the bottom elevation of a foundation concrete cushion layer by adopting an excavation mode of combining blasting with an excavator, and organizing five-square foundation grooves for joint acceptance;
s2, measuring a design point of a positioning pile hole, and erecting a circular pile foundation bamboo plywood formwork: manufacturing a circular pile foundation bamboo plywood formwork, after cleaning a rock substrate, positioning a pile foundation central point and erecting the circular pile foundation bamboo plywood formwork, implanting reinforcing steel bars into a bottom opening of the circular pile foundation bamboo plywood formwork for fixing, and comprehensively plugging by adopting mortar to form a mortar bottom sealing, wherein a top opening of the circular pile foundation bamboo plywood formwork is fixed by adopting pull rod steel bars;
s3, pouring the concrete cushion layer in a layered mode from the foundation to the designed elevation: after the circular pile foundation bamboo plywood formworks are erected in the area, pouring foundation concrete in a layered mode, keeping the concrete around the circular pile foundation bamboo plywood formworks to rise uniformly and synchronously, and preventing the circular pile foundation bamboo plywood formworks from deflecting due to overlarge pressure on one side;
s4, removing the bamboo plywood formwork of the circular pile foundation, and rechecking the pile hole position: after the strength of the foundation concrete reaches the formwork removal requirement, inwards removing the circular pile foundation bamboo plywood formwork, chiseling the contact surface of the circular pile foundation bamboo plywood formwork and the foundation concrete, rechecking the position size of a pile hole, and performing the next procedure after the allowable deviation requirement is met;
s5: arranging a drilling machine to drill to the base to the designed depth: after all the circular pile foundation bamboo plywood templates are dismantled and the strength of the foundation concrete meets the design requirement, arranging a rotary drilling rig to drill to the design depth, and performing the next process construction of the pile foundation.
The circular pile foundation bamboo plywood template is circular, the outer diameter of the circular pile foundation bamboo plywood template is consistent with the diameter of a pile hole, and plumbs are performed in four directions of the circular pile foundation bamboo plywood template in a perpendicularity mode.
The circular pile foundation bamboo plywood formwork is a detachable formwork which contracts inwards and can be used repeatedly.
And in the step S5, the drill bit of the rotary drilling rig directly penetrates through the foundation concrete to drill the rock substrate.
And in the step S5, the drilling depth of the rock substrate is 8m.
And in the vibration process of pouring the foundation concrete in the step S3, the bamboo plywood formwork with the circular pile foundation cannot be attached to vibrate.
The tie bar reinforcing steel bars are fixed on the rock substrate through bar planting tie bar reinforcing steel bars.
The invention has the beneficial effects that: according to the method, the circular pile foundation bamboo plywood formwork is erected at the position of the pile mining hole and is fixedly closed, the foundation concrete is poured to the designed height in a layered mode, the formwork is dismantled after the concrete strength meets the design requirement, the pile foundation is preformed, then the rotary drilling rig is arranged to directly penetrate through the concrete layer to drill towards the rock base to form the pile hole, the problem that the space is narrow, the pile is formed firstly, then the slag is removed is effectively solved, the method is high in operability and safety, the construction cost of drilling after the foundation concrete is directly poured firstly is effectively reduced, the construction efficiency is improved, and the quality is guaranteed.
Drawings
Fig. 1 is a schematic diagram of the circular pile foundation bamboo plywood formwork erection of the invention.
FIG. 2 is a schematic diagram of the present invention after the foundation concrete pad has been poured.
Fig. 3 is a schematic diagram of pile foundation pre-hole of the invention.
Wherein: 1-a rock substrate; 2-planting the steel bar of the tie rod; 3, reinforcing steel bars; 4-bottom sealing of mortar; 5-a pull rod steel bar; 6-circular pile foundation bamboo plywood formwork; 7-base concrete; 8-contacting the rough surface; 9-pile foundation pore-forming.
Detailed Description
A pre-hole forming method for a foundation concrete cushion pile foundation is characterized in that a circular pile foundation bamboo plywood formwork 6 is erected at a pile hole position, the top and the bottom are firm, after foundation concrete 7 is poured to a designed elevation in a layered mode, the circular pile foundation bamboo plywood formwork 6 is dismantled after the foundation concrete 7 meets design requirements, and pre-hole forming of the pile foundation is achieved.
The pre-hole construction condition of the foundation concrete structure pile foundation related in the embodiment is as follows: big lianwan submarine tunnel bei quai diaphragm wall district adopts concrete cushion + pile foundation design, and 7 bed course thickness of basic concrete are about 3m, and the bored concrete pile footpath is 1.0m, and rock-entering degree of depth 8m, and every section diaphragm wall district bored concrete pile cardinality volume is 36, and pile foundation quantity is comparatively intensive, and the space operation face is narrow and small.
The construction quality requirement is as follows: in order to ensure the integrity of the pile body of the cast-in-place pile, the pile hole needs to be formed in one step, so that the pile hole in the part of the foundation concrete cushion layer is formed in advance, the position of the cast-in-place pile hole needs to be accurate, the verticality meets the design requirement, and the diameter of the pile cannot be reduced.
A pre-hole forming method for a foundation concrete cushion pile foundation specifically comprises the following steps:
s1, excavating a foundation to a bottom elevation of a foundation concrete cushion layer:
firstly, excavating a foundation of a diaphragm wall area to the bottom elevation of a foundation concrete 7 cushion layer by adopting an excavation mode of combining blasting with an excavator, ensuring that the bottom surface of a foundation trench is flat and solid, and organizing the combined acceptance of five square foundation trenches;
s2, measuring the design point of the positioning pile hole, and erecting a circular pile foundation bamboo plywood formwork 6:
manufacturing a circular pile foundation bamboo plywood formwork 6, wherein the diameter of an outer opening is 1.0m, and the circular pile foundation bamboo plywood formwork can be guaranteed to be dismounted from the inside; after the rock substrate 1 is cleaned up, pile foundation center point positioning and circular pile foundation bamboo plywood formwork 6 erection are carried out, 4 phi 20 circular reinforcing steel bars 3 are implanted into the bottom opening of the circular pile foundation bamboo plywood formwork 6 for fixation, and mortar is adopted for bottom opening plugging to form a mortar back cover 4, the top opening of the circular pile foundation bamboo plywood formwork 6 is fixed in a 45-degree direction by adopting 4 phi 16 circular tie bars 5, and the tie bars 5 are fixed on the rock substrate 1 through the tie bars 2;
s3, pouring the foundation concrete cushion layer to a designed elevation in a layered mode:
after the 36 circular pile foundation bamboo plywood templates 6 in the wall segment area are erected, pouring a concrete cushion layer according to the height of 50cm in a layering mode, keeping the concrete around the circular pile foundation bamboo plywood templates 6 uniformly and synchronously raised, and preventing the circular pile foundation bamboo plywood templates 6 from deflecting due to overlarge pressure on one side, as shown in fig. 2; in the process of vibrating the poured concrete cushion layer, the concrete cannot be vibrated by attaching a mould;
s4, removing the circular pile foundation bamboo plywood formwork 6, and drilling by a drilling machine to a designed depth:
after the strength of the cushion foundation concrete 7 reaches the stripping condition, loosening and removing the circular pile foundation bamboo plywood formwork 6 inwards, rechecking the pile hole position, and roughening the contact surface of the circular pile foundation bamboo plywood formwork 6 and the foundation concrete 7, wherein the contact roughened surface 8 is roughened as shown in fig. 3; rechecking the position size of the pile hole, and performing the next procedure after meeting the requirement of allowable deviation;
s5: arranging a drilling machine to drill to the base to the designed depth:
and after the strength of the foundation concrete 7 of the cushion layer meets the design requirement, arranging a rotary drilling rig to drill to the depth of 8m below the concrete cushion layer, finishing pile foundation pore-forming 9 as shown in fig. 3, and performing pile foundation concrete construction.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A pre-hole forming method for a foundation concrete cushion pile foundation is characterized by comprising the following steps:
s1, excavating a foundation to a bottom elevation of a foundation concrete cushion layer: firstly, excavating a foundation to the bottom elevation of a foundation concrete (7) cushion layer by adopting an excavation mode of combining blasting with an excavator, and organizing five-square foundation grooves for joint acceptance;
s2, measuring design point positions of positioning pile holes, and erecting a circular pile foundation bamboo plywood formwork (6): manufacturing a circular pile foundation bamboo plywood formwork (6), after cleaning a rock substrate (1), positioning a pile foundation central point and erecting the circular pile foundation bamboo plywood formwork (6), implanting reinforcing steel bars (3) into a bottom opening of the circular pile foundation bamboo plywood formwork (6) for fixing, and comprehensively plugging by adopting mortar to form a mortar back cover (4), wherein a top opening of the circular pile foundation bamboo plywood formwork (6) is fixed by adopting pull rod steel bars (5);
s3, pouring the concrete cushion layer in a layered mode from the foundation to the designed elevation: after the circular pile foundation bamboo plywood formwork (6) is erected in the area, pouring foundation concrete (7) in a layered mode, keeping the concrete around the circular pile foundation bamboo plywood formwork (6) uniformly and synchronously rising, and preventing the circular pile foundation bamboo plywood formwork (6) from deflecting due to overlarge pressure on one side;
s4, dismantling the circular pile foundation bamboo plywood formwork (6), and rechecking the pile hole position: after the strength of the foundation concrete (7) meets the formwork removal requirement, inwards removing the circular pile foundation bamboo plywood formwork (6), chiseling the contact surface of the circular pile foundation bamboo plywood formwork (6) and the foundation concrete (7), rechecking the position size of a pile hole, and performing the next procedure after meeting the allowable deviation requirement;
s5: arranging a drilling machine to drill to the base to the designed depth: after all the circular pile foundation bamboo plywood templates (6) are dismantled, and the strength of the foundation concrete (7) meets the design requirement, arranging a rotary drilling rig to drill to the design depth, and performing the next process construction of the pile foundation.
2. The method for pre-drilling the foundation concrete cushion pile foundation according to claim 1, wherein the circular pile foundation bamboo plywood formwork (6) is circular, the outer diameter of the circular pile foundation bamboo plywood formwork is consistent with the diameter of the pile hole, and the circular pile foundation bamboo plywood formwork (6) is plumbed in four directions in a perpendicularity mode.
3. A method for pre-drilling a foundation concrete cushion pile foundation according to claim 2, wherein the circular pile foundation bamboo plywood formwork (6) is a detachable formwork which is inwardly shrunk.
4. The method for pre-drilling the foundation concrete cushion pile foundation according to the claim 1, wherein in the step S5, a drill bit of a rotary drilling rig directly penetrates through the foundation concrete (7) to drill the rock substrate (1).
5. The method for pre-drilling a pile foundation of a basic concrete cushion according to claim 4, wherein the rock substrate (1) is drilled to a depth of 8m in the step S5.
6. The method for pre-drilling a hole on a foundation concrete cushion pile foundation according to claim 1, wherein the bamboo plywood formwork (6) for the circular pile foundation cannot be attached to the concrete pile foundation during the vibrating process for pouring the foundation concrete (7) in the step S3.
7. A method for pre-drilling a foundation concrete pad pile foundation according to claim 1, wherein the tie bars (5) are fixed on the rock substrate (1) by means of bar-embedded tie bars (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211469997.6A CN115559299A (en) | 2022-11-23 | 2022-11-23 | Pre-hole forming method for foundation concrete cushion pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211469997.6A CN115559299A (en) | 2022-11-23 | 2022-11-23 | Pre-hole forming method for foundation concrete cushion pile foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115559299A true CN115559299A (en) | 2023-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211469997.6A Pending CN115559299A (en) | 2022-11-23 | 2022-11-23 | Pre-hole forming method for foundation concrete cushion pile foundation |
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| CN (1) | CN115559299A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1715990A1 (en) * | 1989-06-27 | 1992-02-28 | Завод-втуз при Норильском горно-металлургическом комбинате им.А.П.Завенягина | Method for reinforcing pile foundations of buildings and structures |
| CN103498476A (en) * | 2013-10-14 | 2014-01-08 | 成军 | Major-diameter hole-forming pile pier foundation and net foundation slab reverse building construction method |
| CN105002891A (en) * | 2015-07-29 | 2015-10-28 | 北京城建北方建设有限责任公司 | Earth-among-pile excavation-free construction method for cast-in-situ bored piles |
| CN208650079U (en) * | 2018-07-13 | 2019-03-26 | 中建八局第二建设有限公司 | A kind of isolated footing cushion cap formwork ruggedized construction |
| CN109653223A (en) * | 2018-11-21 | 2019-04-19 | 中铁十二局集团有限公司 | River anti-floating weighting board construction method |
| CN215564591U (en) * | 2021-04-14 | 2022-01-18 | 广东省建筑工程机械施工有限公司 | Bearing platform column reinforcing steel bar fixing structure and bearing platform column pouring template fixing structure |
-
2022
- 2022-11-23 CN CN202211469997.6A patent/CN115559299A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1715990A1 (en) * | 1989-06-27 | 1992-02-28 | Завод-втуз при Норильском горно-металлургическом комбинате им.А.П.Завенягина | Method for reinforcing pile foundations of buildings and structures |
| CN103498476A (en) * | 2013-10-14 | 2014-01-08 | 成军 | Major-diameter hole-forming pile pier foundation and net foundation slab reverse building construction method |
| CN105002891A (en) * | 2015-07-29 | 2015-10-28 | 北京城建北方建设有限责任公司 | Earth-among-pile excavation-free construction method for cast-in-situ bored piles |
| CN208650079U (en) * | 2018-07-13 | 2019-03-26 | 中建八局第二建设有限公司 | A kind of isolated footing cushion cap formwork ruggedized construction |
| CN109653223A (en) * | 2018-11-21 | 2019-04-19 | 中铁十二局集团有限公司 | River anti-floating weighting board construction method |
| CN215564591U (en) * | 2021-04-14 | 2022-01-18 | 广东省建筑工程机械施工有限公司 | Bearing platform column reinforcing steel bar fixing structure and bearing platform column pouring template fixing structure |
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Application publication date: 20230103 |