CN214245694U - Pile-forming system of large-diameter bored piles in karst areas - Google Patents
Pile-forming system of large-diameter bored piles in karst areas Download PDFInfo
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- CN214245694U CN214245694U CN202023101942.9U CN202023101942U CN214245694U CN 214245694 U CN214245694 U CN 214245694U CN 202023101942 U CN202023101942 U CN 202023101942U CN 214245694 U CN214245694 U CN 214245694U
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- 230000002787 reinforcement Effects 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 13
- 235000019994 cava Nutrition 0.000 abstract description 5
- 238000011065 in-situ storage Methods 0.000 description 6
- 210000003205 muscle Anatomy 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
本实用新型公开了岩溶地区大直径钻孔灌注桩成桩体系，属于桩基浇筑技术领域。本实用新型包括依次相连的下部短护筒部、中部套管部和上部长护筒部；中部套管部包括PVC套管、主筋和箍筋，主筋沿箍筋布设有一圈，主筋和箍筋构成钢筋笼，钢筋笼的中段通过混凝土固定在PVC套管中；上部长护筒部主要由钢筋笼的上端通过浇筑混凝土构成的上部混凝土柱；下部短护筒部包括下部短护筒以及由钢筋笼的上端通过浇筑混凝土构成的下部混凝土柱，钢筋笼上设有一圈连接T形筋，连接T形筋抵于PVC套管的内壁。本实用新型在溶洞区进行成桩浇筑时，无需处治或填充地下溶洞，特别是大体量的溶洞，对溶洞环境影响小，降低造价。
The utility model discloses a large-diameter bored cast-in-place pile forming system in karst areas, which belongs to the technical field of pile foundation pouring. The utility model comprises a lower short casing part, a middle casing part and an upper long casing part which are connected in sequence; the middle casing part comprises a PVC casing, a main reinforcement and a stirrup, the main reinforcement is arranged with a circle along the stirrup, and the main reinforcement and the stirrup are arranged in a circle. The steel cage is formed, and the middle section of the steel cage is fixed in the PVC casing by concrete; the upper long casing is mainly composed of the upper concrete column formed by the upper end of the steel cage by pouring concrete; the lower short casing includes the lower short casing and the steel reinforcement. The upper end of the cage is made of a lower concrete column formed by pouring concrete, and a circle of connecting T-shaped rib is arranged on the reinforcement cage, and the connecting T-shaped rib is pressed against the inner wall of the PVC casing. The utility model does not need to treat or fill underground karst caves when piles are poured in the karst cave area, especially for large-scale karst caves, which has little impact on the karst cave environment and reduces construction costs.
Description
Technical Field
The utility model belongs to the technical field of the pile foundation is pour, especially relate to karst area major diameter bored concrete pile becomes stake system.
Background
Karst landforms are widely distributed in China, especially in the southwest region. Karst areas develop a plurality of karst caves and underground rivers, so when the industrial and agricultural construction planning is carried out in the areas, the karst caves and the underground rivers need to be avoided as much as possible, and if the karst caves and the underground rivers cannot be avoided, anti-seepage measures and the like need to be taken. With the comprehensive promotion of the national infrastructure construction, karst geological conditions are often encountered during engineering construction, and the engineering quality and the construction progress are restricted by the problems of the stability and the collapse of the foundation.
In order to overcome the problems of foundation stability and collapse in engineering construction in karst areas, measures for reinforcing the foundation are usually adopted. The most common foundation form is a pile foundation, and when the thickness of a covering layer on the upper part of a karst cave does not meet the requirement of the bearing capacity, a pile body needs to penetrate through the karst cave so as to meet the requirement of the bearing capacity of the pile foundation. The traditional construction method needs to carry out landfill treatment on the karst cave, or adopts a steel casing to be placed in the karst cave to play a role in enclosing the pouring of concrete. The former needs to consume a large amount of landfill materials, and the latter is easy to leak slurry during construction and the used steel casing cannot be recycled, so that the two measures have the problems of environmental pollution, high manufacturing cost and the like.
Therefore, the pile forming system and the construction method of the large-diameter cast-in-situ bored pile in the karst region, which have small influence on the environment of the karst cave, do not need to be buried and can recover the steel casing, are needed to be found out urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects and providing a pile forming system for the large-diameter cast-in-situ bored pile in the karst area.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model relates to a pile forming system of a large-diameter cast-in-situ bored pile in a karst area, which comprises a lower short protective cylinder part, a middle sleeve part and an upper long protective cylinder part which are sequentially connected;
the middle sleeve part comprises a PVC sleeve, a main reinforcement and a stirrup, the main reinforcement is arranged in a circle along the stirrup, the main reinforcement and the stirrup form a reinforcement cage, and the middle section of the reinforcement cage is fixed in the PVC sleeve through concrete;
the upper long protection cylinder part is an upper concrete column mainly formed by pouring concrete at the upper end of the reinforcement cage;
the lower short pile casing part comprises a lower short pile casing and a lower concrete column formed by pouring concrete at the upper end of the reinforcement cage.
Furthermore, one end of the PVC sleeve is connected with the upper long protection cylinder part, and the other end is connected with the lower short protection cylinder part.
Furthermore, a circle of connecting T-shaped ribs are arranged on the reinforcement cage and abut against the inner wall of the PVC sleeve.
Furthermore, a main rib is correspondingly connected with one connecting T-shaped rib.
Furthermore, the outside cover of PVC sleeve pipe is equipped with and meets water inflation sealing washer.
Furthermore, the outer surface of the end part of the lower short protection cylinder is welded with a protection cylinder support frame.
The utility model discloses following beneficial effect has:
the utility model discloses it need not fill subaerial solution cavity region to pour the pile body in solution cavity district, and then the construction speed of very high pile foundation and corresponding construction spill the cost, when being directed at the solution cavity of large size very much, wherein the long pile casing in upper portion that uses before pouring the pile body can also retrieve and recycle, sets up the PVC sleeve at the steel reinforcement cage middle part, not only can prevent that the concrete from flowing into the solution cavity in, can also prevent that dado mud from flowing into the solution cavity and causing environmental pollution.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a pile forming process of a large-diameter cast-in-situ bored pile in a karst area;
FIG. 2 is a schematic structural view of a reinforcement cage;
FIG. 3 is a schematic structural view of a reinforcement cage and a PVC sleeve;
in the drawings, the components represented by the respective reference numerals are listed below:
1-ground; 2-annular angle steel clamps; 3-a wedge-shaped ground ring beam; 4-upper long protecting cylinder; 5-karst cave; 6-PVC sleeves; 7-protecting the cylinder supporting frame; 8-lower short protecting cylinder; 9-wall protection slurry; 10-a reinforcement cage; 11-cable wires; 12-a water-swellable seal ring; 13-a camera; 14-a lighting lamp; 15-main reinforcement; 16-a stirrup; 17-connecting T-shaped ribs; 18-stake hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", and the like, indicate positional or positional relationships, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Welding technical requirement between the reinforcing bar, concrete placement main points, plain soil tamp, pile foundation construction quality standard etc, the utility model discloses do not describe again tiredly, the key explanation the utility model discloses the embodiment of structure.
Referring to fig. 1-3, the present invention relates to a pile-forming system for large-diameter bored concrete piles in karst areas, which comprises a lower short protective cylinder, a middle sleeve and an upper long protective cylinder connected in sequence, wherein the concrete is poured from bottom to top.
The pile forming system is a pile foundation improved corresponding to a karst area special terrain, and is a pile foundation corresponding to an area with a cavity under the ground surface, wherein a lower short pile casing part is arranged under a construction foundation under the cavity, a middle sleeve part is arranged in the cavity area, and an upper long pile casing part is arranged in the ground surface area above the cavity.
Firstly, a pile hole 18 is drilled on the ground 1, then an annular wedge-shaped foundation pit is excavated on the outer ring of the pile hole 18, then reinforcing steel bars are bound and concrete is poured to form a wedge-shaped ground ring beam 3, a steel casing with a proper size is selected according to the size of the pile hole 18, an upper long casing 4 is manufactured in sections, then the hole is dug, the steel casing is driven in sections to a required depth, an annular angle steel fixture 2 is welded on the top of the long casing 4, and the integral upper long casing 4 is clamped and fixed on the wedge-shaped ground ring beam 3.
And (3) continuing drilling until the karst cave 5 in the stratum is penetrated, replacing a small-size drill bit, drilling along the direction of the long pile casing 4, installing a lower short pile casing 8 at the hole opening part below the karst cave 5, manually discharging, welding pile casing support frames 7 around the top of the outer wall of the lower short pile casing 8, fixing the pile casing support frames on rock mass of the peripheral karst cave 5, and performing slurry circulation wall protection on holes below the lower end of the other lower short pile casing 8.
Specifically, the middle sleeve part comprises a PVC sleeve 6, a main reinforcement 15 and a stirrup 16, the main reinforcement 15 is arranged in a circle along the stirrup 16, and the main reinforcement 15 and the stirrup 16 form the reinforcement cage 10.
The lower short pile casing part comprises a lower short pile casing 8 and a lower concrete column formed by pouring concrete at the upper end of a reinforcement cage 10.
When concrete is poured in the lower short protection tube 8, auxiliary pouring can be performed through the cable 11 hanging illuminating lamp 14 and the camera 13, and when concrete is prevented from being poured, the upper port of the lower short protection tube 8 is prevented from being filled with concrete.
Specifically, the middle section of the reinforcement cage 10 is fixed in the PVC casing 6 by concrete.
Be equipped with the round on steel reinforcement cage 10 and connect T shape muscle 17, connect T shape muscle 17 and support in PVC sleeve pipe 6's inner wall, it is specific, connect the one end of T shape muscle 17 and connect in main muscle 15, another section position strip muscle end, strip muscle end supports and leans on PVC sleeve pipe 6, solidifies in PVC sleeve pipe 6 after concreting.
Preferably, a main rib 15 is correspondingly connected to a connecting T-shaped rib 17.
The upper long protection cylinder part is mainly an upper concrete column formed by pouring concrete at the upper end of the reinforcement cage 10.
And (3) intensively mixing the commercial concrete, installing a downward guide pipe in the pile hole 18 for concrete pouring, gradually recovering the wall protection slurry 9, withdrawing the illuminating lamp 14 and the camera 13 in time when the height of the concrete reaches the top of the lower short protection cylinder 8, and then continuously pouring the concrete until the height of the concrete reaches the ground 1.
And then pouring the middle sleeve part and the upper long protective barrel part in sequence.
When the upper half section of the upper long protection cylinder part is poured, the upper long protection cylinder 4 is slowly pulled out, and concrete is supplemented to complete the construction of the large-diameter cast-in-situ bored pile forming system in the karst region.
According to the above casting method, one end of the PVC casing 6 formed after casting is connected to the upper long shroud section and the other end is connected to the lower short shroud section 8.
Preferably, the PVC sleeve 6 is externally sleeved with a water-swellable seal ring 12.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023101942.9U CN214245694U (en) | 2020-12-21 | 2020-12-21 | Pile-forming system of large-diameter bored piles in karst areas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023101942.9U CN214245694U (en) | 2020-12-21 | 2020-12-21 | Pile-forming system of large-diameter bored piles in karst areas |
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| CN214245694U true CN214245694U (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023101942.9U Active CN214245694U (en) | 2020-12-21 | 2020-12-21 | Pile-forming system of large-diameter bored piles in karst areas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232615A (en) * | 2021-12-10 | 2022-03-25 | 中国一冶集团有限公司 | Cast-in-place pile steel casing |
| CN115262563A (en) * | 2022-08-19 | 2022-11-01 | 中铁二局集团有限公司 | Construction method and device for penetrating closed karst cave layer through pile foundation engineering |
-
2020
- 2020-12-21 CN CN202023101942.9U patent/CN214245694U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232615A (en) * | 2021-12-10 | 2022-03-25 | 中国一冶集团有限公司 | Cast-in-place pile steel casing |
| CN115262563A (en) * | 2022-08-19 | 2022-11-01 | 中铁二局集团有限公司 | Construction method and device for penetrating closed karst cave layer through pile foundation engineering |
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