CN105544508A - Cast-in-place pile applicable to karst region having communicating channels - Google Patents
Cast-in-place pile applicable to karst region having communicating channels Download PDFInfo
- Publication number
- CN105544508A CN105544508A CN201510872963.5A CN201510872963A CN105544508A CN 105544508 A CN105544508 A CN 105544508A CN 201510872963 A CN201510872963 A CN 201510872963A CN 105544508 A CN105544508 A CN 105544508A
- Authority
- CN
- China
- Prior art keywords
- pile
- karst area
- reinforcing cage
- coating member
- connectivity path
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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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
-
- 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
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0085—Geotextiles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a cast-in-place pile applicable to a karst region having communicating channels. The cast-in-place is applicable to the karst region having the communicating channels, and comprises a pile body that is arranged in the karst region having the communicating channels, and a covering part that covers a steel reinforcement cage of the pile body before pile forming; a diameter of the covering part is greater than a diameter of the steel reinforcement cage of the pile body before pile forming, and a length of the covering part is greater than a height of the steel reinforcement cage of the pile body before pile forming; in a use state, the covering part extends into the communicating channels in the karst region, and the covering part extending into the communicating channels is filled with concrete slurry. The cast-in-place pile of the present invention is capable of better combining with integral rock in the communicating karst region for bearing together, and also capable of remarkably increasing the pile side frictional resistance of a pile foundation, thereby improving the integral bearing capability of the foundation.
Description
Technical field
The present invention relates to building field, particularly a kind of castinplace pile being applicable to the karst area with connectivity path.
Background technology
Karst is that water carries out solublerocks such as carbonate rock, gypsum, rock salt based on chemical corrosion, and flowing water erosion, the mechanisms such as erosion and avalanche of diving are auxiliary geologic process, and act on the general name of the phenomenon produced by these.The karst area of China mainly concentrates on southwest, and the karst area area of southwest accounts for more than 1/3rd of whole southwest area, and the geological condition complex of karst area.When carrying out infrastructure design, construction in karst area, designing requirement is high, constructional difficulties is large, the cycle is long, easy generation construction accident, cause design, construction cost increases greatly, under the Major Strategic behave of national Implementation of Western Development, construction of the West Region is just in construction like a raging fire, and how designing in karst area, building the Foundation Design meeting building or the requirement of structure bearing capacity of foundation soil is the difficult problem that pendulum needs solution together badly in face of design, constructor.
For the engineering geological conditions of this complexity of karst area, what at present conventional Foundation Design form adopted is pile foundation, and pile foundation common type be the general stake of excavated by manual work fill orifice, Model analysis etc.
Construction of manual-excavation cast-in-place pile technique is relatively simple, technical requirements is not high, construction cost is cheap, hole quality can also be checked, the quality of easy guarantee concreting, but hand excavated pile has certain limitation, just be useful in long about 6m to the 20m of stake, and it is higher to security requirement, as pernicious gas, inflammable gas, rarefaction of air etc., when in solution cavity, groundwater table is higher, also need to take out while dig and also have particular/special requirement to earth leakage protective, and run into and have compared with during when connectivity karst area or to the Foundation Design that requirement for bearing capacity is higher, the long requirement sometimes not reaching design of stake of manually digging hole.
Model analysis uses big machinery boring, short construction period, speed is fast, technical maturity, process is reliably comparatively safe, the stake of the method construction is long reaches more than 20m, but owing to belonging to disguised engineering, quality specifications is difficult to control, but a lot of solution cavity of the Area distribution due to karst area, and skewness, not of uniform size, but also there is connectedness, in the mortar depositing construction process of reality, if construction wrong, easily there is spillage, step on hole, undergauge, the phenomenons such as stake holes deflection, if and run into the karst area of geological condition complexity, conventional that pile foundation cannot meet the requirement of bearing capacity, the effect of pile foundation cannot be played.
The information being disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The object of the present invention is to provide a kind of castinplace pile being applicable to have the karst area of connectivity path, thus avoid the castinplace pile of the karst area with connectivity path that the phenomenon such as spillage, undergauge easily occurs, effectively can also ensure the pile quality of castinplace pile, improve stake simultaneously and there is the globality of connectivity path karst, significantly improving the bearing capacity of stake.
Another object of the present invention is to provide a kind of piling method being applicable to have the castinplace pile of the karst area of connectivity path.
For achieving the above object, the invention provides a kind of castinplace pile being applicable to have the karst area of connectivity path, described castinplace pile is applicable to the karst area with connectivity path; Described castinplace pile comprises: pile body, and it is located at has in the karst area of connectivity path; And coating member, it is coated on outside the reinforcing cage before described pile body pile, and the diameter of described coating member is greater than the diameter of the reinforcing cage before described pile body pile, and the length of described coating member is greater than the height of reinforcing cage before described pile body pile; In a state of use, described coating member extends in the connectivity path in described karst area, in the coating member that described connectivity path extends, be filled with concrete mud.
Preferably, in technique scheme, described coating member is the open-topped composite earthwork cloth of bottom closure.Composite earthwork cloth has the physical and mechanical property indexs such as good tension, tear-proof, puncture resistance, also has higher intensity, good extension property, and has larger modulus of deformation.Also there is the feature such as good acid and alkali-resistance, anticorrosive, ageing-resistant, good permeability simultaneously.The composite earthwork cloth adopting this material to make can be good at playing its flexible effect.
Preferably, in technique scheme, the diameter 1m more than larger than the reinforcing cage diameter before described pile body pile of described coating member, the length of described coating member is than height more than the height 2m of the reinforcing cage before described pile body pile, and size can adjust according to concrete condition.
A piling method for castinplace pile, comprises the following steps:
(1) first open-topped for bottom closure composite earthwork cloth is enclosed within outside reinforcing cage;
(2) then hang in the position of pre-aligned pile the reinforcing cage being coated with the open-topped composite earthwork cloth of bottom closure, there is to pumping in reinforcing cage the concrete of certain setting time again, then inject high-pressure slurry, by high-pressure slurry, the concrete mud that compound building cloth wraps up is filled in the passage blocking up and have connective karst area.
Compared with prior art, the present invention has following beneficial effect:
(1) castinplace pile of the present invention utilizes the flexibility of composite earthwork cloth, when composite earthwork cloth middle-high pressure grouting open-topped to bottom closure, composite earthwork cloth can stick out, extrude in the karst with connectivity path simultaneously, the connectivity path of blocking up in karst can be filled, can also be filled in the gap of karst simultaneously, enable combining of the better rock entirety with having in the karst area of connectivity path of steel concrete, common carrying, and the pile side friction of pile foundation can be significantly improved, thus improve the total bearing capacity of ground.Relative to the castinplace pile that existing karst area uses, greatly improve pile quality, and increase substantially castinplace pile and the globality with the rock in the karst area of connectivity path, pile foundation is guaranteed in the safety of karst area.
(2) castinplace pile of the present invention can the effective disease such as mortar leakage prevention, necking down, can be good at improving pile quality, improves stake simultaneously and has the globality of the rock in the karst area of connectivity path, significantly improve the bearing capacity of stake.Castinplace pile of the present invention can also adapt to the karst area with connectivity path being difficult to verify completely engineering geological condition, also fully can improve the globality of stake and rock, ensure that the requirement for bearing capacity of Foundation Design.
(3) construction method of castinplace pile of the present invention is simple, and construction sequence is less, and workman can be made more easily to construct, and ensures the requirement of construction quality and bearing capacity, can also save engineering time and construction costs, improve efficiency of construction.
Accompanying drawing explanation
Fig. 1 is according to the geological condition schematic diagram being applicable to have the karst area of connectivity path of the present invention.
Fig. 2 is according to the pore-forming schematic diagram being applicable to have the karst area of connectivity path of the present invention.
Fig. 3 be according to the described pile body pile being applicable to have the karst area of connectivity path of the present invention before reinforcing cage schematic diagram.
Fig. 4 is according to the castinplace pile schematic diagram being applicable to have the karst area of connectivity path of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of detailed description of the invention.
Clearly represent unless otherwise other, otherwise in whole manual and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or ingredient, and do not get rid of other element or other ingredient.
As shown in Figures 1 to 4, according to a kind of castinplace pile being applicable to the karst area with connectivity path of the specific embodiment of the invention, described castinplace pile is applicable to the karst area with connectivity path, described in have in the rock 1 of the karst area of connectivity path and have connectivity path 2 and solution cavity 3.Described castinplace pile comprises: pile body 4 is reinforced concrete pile, and is located in the stake holes 8 offered connective karst area 1.Coating member, this coating member is the open-topped composite earthwork cloth 5 of bottom closure, the open-topped geotextiles of bottom closure 5 is coated on outside the reinforcing cage 7 before described pile body pile, the diameter of described coating member is greater than the diameter of the reinforcing cage 7 before described pile body pile, and the length of described coating member is greater than the height of the reinforcing cage 7 before described pile body pile.The diameter 1m more than larger than reinforcing cage 7 diameter before described pile body pile of described coating member, the length 2m more than longer than the height of the reinforcing cage 7 before described pile body pile of described coating member.In a state of use, composite earthwork cloth 5 fills in the connectivity path 2 of blocking up in described connective karst area under the effect of high-pressure slurry, and filling in the coating member that described connectivity path extends stifledly has concrete mud 6.
Castinplace pile of the present invention utilizes the flexibility of composite earthwork cloth, when composite earthwork cloth 5 middle-high pressure grouting open-topped to bottom closure, composite earthwork cloth 5 can stick out, extrude in the karst with connectivity path simultaneously, the connectivity path of blocking up in karst can be filled, can also be filled in the gap of karst simultaneously, enable combining of the rock entirety in the better and connective karst area of steel concrete, common carrying, and the pile side friction of pile foundation can be significantly improved, thus improve the total bearing capacity of ground.Relative to the castinplace pile that existing karst area uses, greatly improve pile quality, and increase substantially castinplace pile and the globality with the rock in the karst area of connectivity path, pile foundation is guaranteed in the safety of karst area.Castinplace pile of the present invention can also the effective disease such as mortar leakage prevention, necking down, can be good at improving pile quality, improves stake simultaneously and has the globality of the rock in connectivity path karst area, significantly improve the bearing capacity of stake.Castinplace pile of the present invention can also adapt to the karst area with connectivity path being difficult to verify completely engineering geological condition, also fully can improve the globality of stake and rock, ensure that the requirement for bearing capacity of Foundation Design.
A piling method for castinplace pile, comprises the following steps:
(1) first open-topped for bottom closure composite earthwork cloth is enclosed within outside reinforcing cage;
(2) then hang in the position of pre-aligned pile the reinforcing cage being coated with the open-topped composite earthwork cloth of bottom closure, there is to pumping in reinforcing cage the concrete of certain setting time again, then inject high-pressure slurry, by high-pressure slurry, the concrete mud that compound building cloth wraps up is filled in the passage blocking up and have connective karst area.
The piling method of castinplace pile of the present invention is simple, and construction sequence is less, and workman can be made more easily to construct, and ensures the requirement of construction quality and bearing capacity, can also save engineering time and construction costs, improve efficiency of construction.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (4)
1. be applicable to a castinplace pile for the karst area with connectivity path, it is characterized in that, described castinplace pile is applicable to the karst area with connectivity path, and described castinplace pile comprises:
Pile body, it is located at has in the karst area of connectivity path; And
Coating member, it is coated on outside the reinforcing cage before described pile body pile, and the diameter of described coating member is greater than the diameter of the reinforcing cage before described pile body pile, and the length of described coating member is greater than the height of the reinforcing cage before described pile body pile; In a state of use, described coating member extends in the connectivity path in described karst area, in the coating member that described connectivity path extends, be filled with concrete mud.
2. the castinplace pile being applicable to the karst area with connectivity path according to claim 1, is characterized in that, described coating member is the open-topped composite earthwork cloth of bottom closure.
3. the castinplace pile being applicable to the karst area with connectivity path according to claim 1, it is characterized in that, the diameter 1m more than larger than the diameter of the reinforcing cage before described pile body pile of described coating member, the length of described coating member is than height more than the height 2m of the reinforcing cage before described pile body pile.
4. the piling method of castinplace pile as described in claims 1 to 3, is characterized in that, comprise the following steps:
(1) first open-topped for bottom closure composite earthwork cloth is enclosed within outside reinforcing cage;
(2) then hang in the position of pre-aligned pile the reinforcing cage being coated with the open-topped composite earthwork cloth of bottom closure, there is to pumping in reinforcing cage the concrete of certain setting time again, then inject high-pressure slurry, by high-pressure slurry, the concrete mud that compound building cloth wraps up is filled in the passage blocking up and have connective karst area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510872963.5A CN105544508A (en) | 2015-12-02 | 2015-12-02 | Cast-in-place pile applicable to karst region having communicating channels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510872963.5A CN105544508A (en) | 2015-12-02 | 2015-12-02 | Cast-in-place pile applicable to karst region having communicating channels |
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| CN105544508A true CN105544508A (en) | 2016-05-04 |
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| CN201510872963.5A Pending CN105544508A (en) | 2015-12-02 | 2015-12-02 | Cast-in-place pile applicable to karst region having communicating channels |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926658A (en) * | 2016-05-10 | 2016-09-07 | 中国科学院武汉岩土力学研究所 | Capsule type pouring and filling method and structure for large-size karst pile foundation construction |
| CN107938724A (en) * | 2017-11-28 | 2018-04-20 | 中铁上海设计院集团有限公司 | A kind of friction-type bored concrete pile and its Model Calculating Method for karst region |
| CN107992673A (en) * | 2017-11-28 | 2018-05-04 | 中铁上海设计院集团有限公司 | A kind of depth of exploration for karst region bridge pile foundation determines method |
| CN110424378A (en) * | 2019-07-10 | 2019-11-08 | 湖南大学 | Punish stress dispersion intussusception steel-pipe pile and its installation method that solution cavity is lain concealed at stake end |
| CN110820732A (en) * | 2019-10-31 | 2020-02-21 | 广西大学 | Cast-in-situ bored pile suitable for karst area with connectivity channel and pile forming method |
| CN115467358A (en) * | 2022-08-25 | 2022-12-13 | 中煤科工西安研究院(集团)有限公司 | Micro pile composite structure for reinforcing broken stratum, micro pile and construction process |
| CN115679955A (en) * | 2022-10-09 | 2023-02-03 | 重庆大学 | Construction device and construction method for pile foundation in solution cavity |
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| CN205171506U (en) * | 2015-12-02 | 2016-04-20 | 广西大学 | Bored concrete pile in karst area suitable for connectivity passageway has |
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| CN201202116Y (en) * | 2008-05-28 | 2009-03-04 | 徐立新 | Geotextile bag bulk material follow-up grouting pile |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926658A (en) * | 2016-05-10 | 2016-09-07 | 中国科学院武汉岩土力学研究所 | Capsule type pouring and filling method and structure for large-size karst pile foundation construction |
| CN107938724A (en) * | 2017-11-28 | 2018-04-20 | 中铁上海设计院集团有限公司 | A kind of friction-type bored concrete pile and its Model Calculating Method for karst region |
| CN107992673A (en) * | 2017-11-28 | 2018-05-04 | 中铁上海设计院集团有限公司 | A kind of depth of exploration for karst region bridge pile foundation determines method |
| CN107992673B (en) * | 2017-11-28 | 2021-03-30 | 中铁上海设计院集团有限公司 | Exploration depth determination method for karst area bridge pile foundation |
| CN110424378A (en) * | 2019-07-10 | 2019-11-08 | 湖南大学 | Punish stress dispersion intussusception steel-pipe pile and its installation method that solution cavity is lain concealed at stake end |
| CN110424378B (en) * | 2019-07-10 | 2024-03-22 | 湖南大学 | Stress dispersion telescopic steel pipe pile for treating pile end hidden karst cave and installation method thereof |
| CN110820732A (en) * | 2019-10-31 | 2020-02-21 | 广西大学 | Cast-in-situ bored pile suitable for karst area with connectivity channel and pile forming method |
| CN115467358A (en) * | 2022-08-25 | 2022-12-13 | 中煤科工西安研究院(集团)有限公司 | Micro pile composite structure for reinforcing broken stratum, micro pile and construction process |
| CN115467358B (en) * | 2022-08-25 | 2023-12-26 | 中煤科工西安研究院(集团)有限公司 | Micro pile composite structure for reinforcing broken stratum, micro pile and construction process |
| CN115679955A (en) * | 2022-10-09 | 2023-02-03 | 重庆大学 | Construction device and construction method for pile foundation in solution cavity |
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Application publication date: 20160504 |
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