CN106284435A - A kind of method preventing Metro station excavation bedding CS central stand column pile from floating - Google Patents
A kind of method preventing Metro station excavation bedding CS central stand column pile from floating Download PDFInfo
- Publication number
- CN106284435A CN106284435A CN201610805296.3A CN201610805296A CN106284435A CN 106284435 A CN106284435 A CN 106284435A CN 201610805296 A CN201610805296 A CN 201610805296A CN 106284435 A CN106284435 A CN 106284435A
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- CN
- China
- Prior art keywords
- slip casting
- stand column
- steel floral
- column pile
- casting steel
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- 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.)
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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
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
Abstract
The invention discloses a kind of method preventing Metro station excavation bedding CS central stand column pile from floating, comprise the following steps: set multiple hole at bedding CS central interim stand column pile periphery, in each hole, put into a slip casting steel floral tube；The bottom of the slip casting steel floral tube in each hole is all put in the bottom of fluid bowl；In each slip casting steel floral tube, stop grouting plug is put in the concordant position of the bottom of stand column pile interim with central authorities；Fixing stop grouting plug also installs grouting stop-valve, the stratum being pointed to stop grouting plug top in the serosity of preparation is injected each slip casting steel floral tube carries out slip casting, cancel stop grouting plug, in the serosity of preparation is injected each slip casting steel floral tube, the fluid bowl deep regional being originally positioned at stop grouting plug bottom is carried out low-pressure grouting.The invention has the beneficial effects as follows: when slip casting, take cut zone concentration to enclose and cover that the method for delamination pour slurry is avoided that the generation that interim stand column pile floats during ejection for water plugging, so that it is guaranteed that the safety of whole foundation ditch.
Description
Technical field
The present invention relates to building engineering field, particularly relate to one and prevent Metro station excavation bedding CS central stand column pile
The method floated.
Background technology
When City Subway Station is built in strong rich water karst area, in Deep Foundation Pit of Metro Stations digging process, typically adopt
Take the mode of slip casting to block underground karst water, due to the existence of the strong karst of region of FuShui, the central authorities of a lot of stations bedding system
Interim stand column pile is positioned at fluid bowl region or fluid bowl areas adjacent, during slip casting, due to the pressure operation of slip casting, uses generally
The mode of slip casting may result in the interim stand column pile entirety at station and floats, and serious may result in whole foundation pit supporting construction
Unstability, thus cause the bedding system jacking of whole station to destroy, cause huge disaster consequence, for preventing grouting pressure to foundation ditch
The jacking at the end, foundation ditch slip casting major part of the prior art uses the form of intermittent slip casting to carry out, but slip casting process is difficult to
Control.
Summary of the invention
In order to solve the problems referred to above, the invention provides one and prevent in Metro station excavation bedding CS central stand column pile
Floating method, the floating of interim stand column pile during its objective is to efficiently control slip casting when carrying out deep basal pit slip casting,
Guarantee the safety of whole foundation ditch.
To achieve these goals, the present invention provides techniques below scheme:
A kind of method preventing Metro station excavation bedding CS central stand column pile from floating, comprises the following steps:
S1: set multiple hole at bedding CS central interim stand column pile periphery, put into a slip casting spray of molten steel in each hole
Pipe, all slip casting steel floral tubes form one and enclose the system of covering interim for central authorities stand column pile being trapped among and cover in system；
S2: the bottom of the slip casting steel floral tube in each hole is all put in the bottom of fluid bowl；
S3: stop grouting plug is put in the concordant position of the bottom of stand column pile interim with central authorities in each slip casting steel floral tube；
S4: fixing stop grouting plug also installs grouting stop-valve, is pointed to only starch in the serosity of preparation is injected each slip casting steel floral tube
The stratum in portion carries out slip casting beyond the Great Wall, and slurry pressure controls at 0.5 to 1MPa；
S5: complete the stratum slip casting on top, keeps final pressure to stablize 3 to 5 minutes；
S6: cancel stop grouting plug, injects the serosity of preparation in each slip casting steel floral tube being originally positioned at stop grouting plug bottom
Fluid bowl deep regional carries out low-pressure grouting；
S7: complete the stratum slip casting of bottom, keeps final pressure to stablize 3 to 5 minutes.
Further, in step S1, the distance of the interim stand column pile in each hole to central authorities is identical and distance is at 1 to 1.5m.
Further, in step S1, all slip casting steel floral tubes are arranged and the most adjacent ringwise around the interim stand column pile of central authorities
Distance between two slip casting steel floral tubes is 0.3 to 0.5m.
Further, a diameter of φ 42mm of slip casting steel floral tube.
Further, the bottom of all slip casting steel floral tubes is below the bottom of fluid bowl.
Further, in step S3, slip casting steel floral tube is all separated into upper chambers by the stop grouting plug in each slip casting steel floral tube
The outer wall of room and lower chamber and stop grouting plug fits tightly with the inwall of slip casting steel floral tube.
The invention provides a kind of method preventing Metro station excavation bedding CS central stand column pile from floating, its useful effect
Fruit is: when the interim column slip casting of strong rich water karst area station pit, takes cut zone concentration to enclose and covers, delamination pour slurry
Method, is avoided that the generation that interim stand column pile floats during ejection for water plugging, so that it is guaranteed that the safety of whole foundation ditch.
Accompanying drawing explanation
In a kind of method preventing Metro station excavation bedding CS central stand column pile from floating that Fig. 1 provides for the present invention right
The schematic diagram of upper formation slip casting；
In a kind of method preventing Metro station excavation bedding CS central stand column pile from floating that Fig. 2 provides for the present invention right
The schematic diagram of understratum slip casting；
In figure: 1, interim stand column pile；2, slip casting steel floral tube；3, stop grouting plug；4, fluid bowl.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
As depicted in figs. 1 and 2, the invention provides one prevents Metro station excavation bedding CS central stand column pile from floating
Method, comprise the following steps:
S1: set multiple hole at bedding CS central interim stand column pile 1 periphery, put into a slip casting spray of molten steel in each hole
Pipe 2, all slip casting steel floral tubes 2 form one and enclose the system of covering interim for central authorities stand column pile 1 being trapped among and cover in system；
S2: the bottom of the slip casting steel floral tube 2 in each hole is all put in the bottom of fluid bowl 4；
S3: stop grouting plug is put in the concordant position of the bottom of stand column pile 1 interim with central authorities in each slip casting steel floral tube 2
3, put into stop grouting plug 3 in order to ensure by upper formation and bottom in the concordant position of the bottom of stand column pile 1 interim with central authorities
Stratum demarcates；
S4: fixing stop grouting plug 3 also installs grouting stop-valve, is only pointed in the serosity of preparation is injected each slip casting steel floral tube 2
Slurry plug 3 tops stratum carry out slip casting, slurry pressure controls at 0.5 to 1MPa, slurry pressure in span of control so that
Slip casting process stabilization；
S5: complete the stratum slip casting on top, keeps final pressure to stablize 3 to 5 minutes, keeps one section after completing upper formation slip casting
Time can make upper formation slip casting closely knit, and first upper formation is carried out grouting reinforcement and can increase the frictional resistance of pile body；
S6: cancel stop grouting plug 3, injects each slip casting steel floral tube 2 interior to being originally positioned at stop grouting plug 3 bottom by the serosity of preparation
Fluid bowl 4 deep regional carry out low-pressure grouting；
S7: complete the stratum slip casting of bottom, keeps final pressure to stablize 3 to 5 minutes, keeps one section after completing understratum slip casting
Time can make understratum slip casting closely knit.
Pass through above-mentioned steps, it is possible to achieve when the interim column slip casting of strong rich water karst area station pit, take segmentation
Regional centralized is enclosed and is covered, the method for delamination pour slurry, and what all slip casting steel floral tubes 2 were formed encloses the system of covering periphery karst water can be stoped to enter
The scope of the interim stand column pile 1 of central authorities, is avoided that the generation that interim stand column pile 1 floats during ejection for water plugging, so that it is guaranteed that whole
The safety of individual foundation ditch.
In one preferably embodiment, in step S1, the distance in each hole to the interim stand column pile 1 of central authorities is identical and distance
At 1 to 1.5m, each hole distance to the interim stand column pile 1 of central authorities can be adjusted according to the actual size of the interim stand column pile of central authorities 1.
In one preferably embodiment, in step S1, all slip casting steel floral tubes 2 are around the interim stand column pile of central authorities 1 ringwise
Distance between setting and two the most adjacent slip casting steel floral tubes 2 is 0.3 to 0.5m, during slip casting, and the diffusion of its slip casting
Radius is typically at about 0.5m, and slip casting completes the reinforcing scope of grouting behind shaft or drift lining pipe and is the formation of one and encloses the system of covering to stop periphery rock
Molten water enters the scope of the interim stand column pile 1 of central authorities.
In one preferably embodiment, a diameter of φ 42mm of slip casting steel floral tube 2, can be according to actual service condition
Adjust the size of slip casting steel floral tube 2.
In one preferably embodiment, the bottom of all slip casting steel floral tubes 2 is below the bottom of fluid bowl 4, it is ensured that slip casting
The effect of consolidation.
In one preferably embodiment, in step S3, the stop grouting plug 3 in each slip casting steel floral tube 2 is all by the slip casting spray of molten steel
The inwall of outer wall and slip casting steel floral tube 2 that pipe 2 is separated into upper chamber and lower chamber and stop grouting plug 3 fits tightly so that
When carrying out upper formation slip casting, understratum is unaffected.
The above, only presently preferred embodiments of the present invention, not in order to limit the present invention, every skill according to the present invention
Any trickle amendment, equivalent and the improvement that above example is made by art essence, should be included in technical solution of the present invention
Protection domain within.
Claims (6)
1. one kind prevents the method that Metro station excavation bedding CS central stand column pile floats, it is characterised in that include following step
Rapid:
S1: set multiple hole at bedding CS central interim stand column pile periphery, put into a slip casting steel floral tube, institute in each hole
Have slip casting steel floral tube to form one to enclose the system of covering interim for central authorities stand column pile being trapped among and cover in system；
S2: the bottom of the slip casting steel floral tube in each hole is all put in the bottom of fluid bowl；
S3: stop grouting plug is put in the concordant position of the bottom of stand column pile interim with central authorities in each slip casting steel floral tube；
S4: fixing stop grouting plug also installs grouting stop-valve, is pointed on stop grouting plug in the serosity of preparation is injected each slip casting steel floral tube
The stratum in portion carries out slip casting, and slurry pressure controls at 0.5 to 1MPa；
S5: complete the stratum slip casting on top, keeps final pressure to stablize 3 to 5 minutes；
S6: cancel stop grouting plug, injects the serosity of preparation in each slip casting steel floral tube the fluid bowl being originally positioned at stop grouting plug bottom
Deep regional carries out low-pressure grouting；
S7: complete the stratum slip casting of bottom, keeps final pressure to stablize 3 to 5 minutes.
A kind of method preventing Metro station excavation bedding CS central stand column pile from floating the most according to claim 1, its
Being characterised by, in step S1, the distance of the interim stand column pile in each hole to central authorities is identical and distance is at 1 to 1.5m.
A kind of method preventing Metro station excavation bedding CS central stand column pile from floating the most according to claim 2, its
Being characterised by, in step S1, all slip casting steel floral tubes are arranged ringwise around the interim stand column pile of central authorities and the most adjacent two slip castings
Distance between steel floral tube is 0.3 to 0.5m.
A kind of method preventing Metro station excavation bedding CS central stand column pile from floating the most according to claim 1, its
It is characterised by, a diameter of φ 42mm of slip casting steel floral tube.
A kind of method preventing Metro station excavation bedding CS central stand column pile from floating the most according to claim 1, its
Being characterised by, the bottom of all slip casting steel floral tubes is below the bottom of fluid bowl.
A kind of method preventing Metro station excavation bedding CS central stand column pile from floating the most according to claim 1, its
Being characterised by, in step S3, slip casting steel floral tube is all separated into upper chamber and bottom by the stop grouting plug in each slip casting steel floral tube
The outer wall of chamber and stop grouting plug fits tightly with the inwall of slip casting steel floral tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610805296.3A CN106284435B (en) | 2016-09-06 | 2016-09-06 | A kind of method for preventing Metro station excavation bedding CS central stand column pile from floating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610805296.3A CN106284435B (en) | 2016-09-06 | 2016-09-06 | A kind of method for preventing Metro station excavation bedding CS central stand column pile from floating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106284435A true CN106284435A (en) | 2017-01-04 |
| CN106284435B CN106284435B (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610805296.3A Active CN106284435B (en) | 2016-09-06 | 2016-09-06 | A kind of method for preventing Metro station excavation bedding CS central stand column pile from floating |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550693A (en) * | 2009-05-06 | 2009-10-07 | 中国土木工程集团有限公司 | Method for reinforcing base with bored pile in the underground structure of high groundwater level |
| JP2013084378A (en) * | 2011-10-06 | 2013-05-09 | Chugoku Electric Power Co Inc:The | Implantation device of ground resistance reduction agent and ground resistance reduction method |
-
2016
- 2016-09-06 CN CN201610805296.3A patent/CN106284435B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550693A (en) * | 2009-05-06 | 2009-10-07 | 中国土木工程集团有限公司 | Method for reinforcing base with bored pile in the underground structure of high groundwater level |
| JP2013084378A (en) * | 2011-10-06 | 2013-05-09 | Chugoku Electric Power Co Inc:The | Implantation device of ground resistance reduction agent and ground resistance reduction method |
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| Publication number | Publication date |
|---|---|
| CN106284435B (en) | 2018-03-13 |
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Inventor after: Zhang Yue Inventor after: Long Zhonghuang Inventor after: Wang Jun Inventor after: Sun Zeshun Inventor after: Wang Wenxuan Inventor after: Hu Zhongfei Inventor after: Tu Wenliang Inventor before: Zhang Yue Inventor before: Long Zhonghuang Inventor before: Wang Jun Inventor before: Wang Wenxuan Inventor before: Hu Zhongfei Inventor before: Tu Wenliang |