CN202577307U - Post grouting device of pile foundation - Google Patents
Post grouting device of pile foundation Download PDFInfo
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- CN202577307U CN202577307U CN2012201499668U CN201220149966U CN202577307U CN 202577307 U CN202577307 U CN 202577307U CN 2012201499668 U CN2012201499668 U CN 2012201499668U CN 201220149966 U CN201220149966 U CN 201220149966U CN 202577307 U CN202577307 U CN 202577307U
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- pile
- grouting pipe
- grouting
- valve body
- pipe
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Abstract
The utility model discloses a post grouting device of a pile foundation and aims to solve the technical problem that the bearing capacity cannot satisfy the design requirement due to various reasons. A grouting pipe is embedded in a steel reinforcement cage of the pile base; a rear grouting pipe valve is positioned at the bottom of the pile foundation; the grouting pipe is connected with the rear grouting pipe valve; the grouting pipe is stretched out from the ground with 0.3-1.0m; and the upper end of the grouting pipe is plugged preliminarily. After a pile body is formed for 24 hours, because the embedded grouting pipe and the rear grouting pipe valve at the pipe end and the pipe side are pressed into cement paste, mud cake and bottom sediment are reinforced via infiltration, splitting, compacting and the like of the cement paste, thereby improving the pile-soil interface. Meanwhile, the soil within a certain range of the pile is reinforced, the strength of the soil is increased, and the frictional resistance at the pile side and the bearing capacity at the pile end are enhanced, thereby improving the ultimate bearing capacity of the single pile and reducing the settlement greatly.
Description
Technical field
The utility model relates to building field, is a kind of pile bottom post-grouting device specifically.
Background technology
In the construction of pile foundation engineering, often have a small amount of stake for various reasons its bearing capacity can not meet design requirement.How adopt post-grouting technologies to remedy to these, existing method is to adopt boring, the method for slip casting then, this method complicacy of not only constructing, and construction costs is high, the more important thing is the intensity that has reduced pile foundation, brings hidden danger of quality.
The utility model content
For solving this technical problem, the purpose of the utility model provides a kind of pile bottom post-grouting method and realizes the device of this method, and concrete scheme is following:
A kind of pile bottom post-grouting method in the pre-buried grouting pipe of the reinforcing cage of pile foundation, is provided with the grouting behind shaft or drift lining pipe valve in the bottom of pile foundation, and grouting pipe is connected with the grouting behind shaft or drift lining pipe valve, the Grouting Pipe 0.3-1.0m that must elevate above the soil, grouting pipe upper end shutoff in advance; After pile body formed 24 hours, be pressed into cement paste by the pre-buried grouting pipe and the grouting behind shaft or drift lining pipe valve of stake end and stake side, modes such as the infiltration through slurries, splitting densification; Reinforce mud skin and pile bottom sediment; Improve stake pedosphere face, and make the soil body in the Zhou Yiding scope obtain reinforcing, soil strength increases; Increase pile side friction and end load, thereby improve ultimate bearing capacity of single pile significantly and reduce settling amount.
The fixing iron wire cross colligation fixing means that adopts of grouting pipe and reinforcing cage, colligation should be firm, evenly; The colligation of pile end grouting pipe is inboard in the hoop of putting more energy into, and is close to colligation with reinforcing cage master muscle and fixes, and colligation point is each reinforcement hoop place, road; The colligation of stake side grouting pipe is in the spiral stirrup outside, and the colligation dot spacing is 1.0m.
The upper end of said grouting pipe is higher than pile driving construction operation terrace 300-1000mm; Pile end grouting conduit lower port is 200-250mm apart from the reinforcing cage bottom, and reinforcing cage is put more energy into the most together to bind round and should be transferred to 300-400mm place on the vertical muscle bottom.
The invention also discloses a kind of pile bottom post-grouting device, comprise grouting pipe, grouting behind shaft or drift lining pipe valve, said grouting pipe is fixed in the reinforcing cage of pile foundation; Said grouting behind shaft or drift lining pipe valve comprises valve body; Said valve body one end is provided with interface and is connected with grouting pipe; The other end of said valve body is the underseal mouth, and the uniaxial pressure piston is set in the said valve body, and said uniaxial pressure piston and screw rod are fixed; Said screw rod is fixed on the fixed head of going to the bottom in the valve body through regulating pressure nut, between the outside, uniaxial pressure piston and the bottom plate of screw rod, compression spring is set; The mud jacking hole is set, the arranged outside unidirectional control device in said mud jacking hole with said uniaxial pressure piston and the corresponding valve body of bottom plate position.
Distance L 1 between said uniaxial pressure piston and interface is 50-100mm; Said uniaxial pressure piston and the distance L 2 of going to the bottom between fixed head are 50-200mm; Said distance L 3 of going to the bottom between fixed head and underseal mouth is 50-100mm, and the diameter D of said valve body is 25.4-50.5mm.
Said unidirectional control device is a rubber-like rubber, and said rubber is wrapped in the position in said mud jacking hole.
The utility model has the advantages that:
Modes such as the infiltration through slurries, splitting densification; Reinforce the inherent shortcoming of mud skin and pile bottom sediment; Improve stake pedosphere face, and make the soil body in the Zhou Yiding scope obtain reinforcing, soil strength increases; Increase pile side friction and end load, thereby improve ultimate bearing capacity of single pile significantly and reduce settling amount.Post grouting under pile can obviously improve bearing course at pile end and all conditions of stake, improves end resistance and pile side friction, improves the transmission performance of load; Significantly improve bearing capacity of single pile and reduce settling amount; And be applicable to various soil layers, technical matters is simple, and job practices is flexible; Mud jacking equipment is simple, is convenient to penetration and promotion.Can reduce construction costs, shorten the construction period simultaneously, have remarkable economic efficiency.Increased substantially bearing capacity of single pile, reduced drilled pile workmanship hidden danger, comparable conventional art reduces with the stake amount, practices thrift the Foundation Design investment.
Description of drawings
Fig. 1 is the schematic diagram of the utility model;
Fig. 2 is the structural representation of device for the method that realizes the utility model.
The specific embodiment
The principle of the utility model is as shown in Figure 1; In the pre-buried grouting pipe 10 of the reinforcing cage of pile foundation 40, in the bottom of pile foundation grouting behind shaft or drift lining pipe valve 20 is set, grouting pipe 10 is connected with grouting behind shaft or drift lining pipe valve 20; The Grouting Pipe 0.3-1.0m that must elevate above the soil, the shutoff in advance of grouting pipe 10 upper ends; After pile body formed 24 hours, be pressed into cement paste by the pre-buried grouting pipe 10 and the grouting behind shaft or drift lining pipe valve 20 of stake end and stake side, modes such as the infiltration through slurries, splitting densification; Reinforce mud skin and pile bottom sediment; Improve stake pedosphere face, and make the soil body in the Zhou Yiding scope obtain reinforcing, soil strength increases; Increase pile side friction and end load, thereby improve ultimate bearing capacity of single pile significantly and reduce settling amount; Sequence number 30 is the flow direction of cement paste among Fig. 1.
The fixing iron wire cross colligation fixing means that adopts of grouting pipe and reinforcing cage, colligation should be firm, evenly; The colligation of pile end grouting pipe is inboard in the hoop of putting more energy into, and is close to colligation with reinforcing cage master muscle and fixes, and colligation point is each reinforcement hoop place, road; The colligation of stake side grouting pipe is in the spiral stirrup outside, and the colligation dot spacing is 1.0m.
The upper end of said grouting pipe is higher than pile driving construction operation terrace 300-1000mm; Pile end grouting conduit lower port is 200-250mm apart from the reinforcing cage bottom, and reinforcing cage is put more energy into the most together to bind round and should be transferred to 300-400mm place on the vertical muscle bottom.
As shown in Figure 2, the implement device of the utility model comprises grouting pipe 10, grouting behind shaft or drift lining pipe valve 20, and said grouting pipe 10 is fixed in the reinforcing cage of pile foundation; Said grouting behind shaft or drift lining pipe valve 20 comprises valve body; Said valve body one end is provided with interface 1 and is connected with grouting pipe 20; The other end of said valve body is a underseal mouth 9, and uniaxial pressure piston 2 is set in the said valve body, and said uniaxial pressure piston 2 is fixing with screw rod 6; Said screw rod 6 is fixed on the fixed head 5 of going to the bottom in the valve body through regulating pressure nut 7, at the outside, uniaxial pressure piston 2 and 5 of the bottom plates of screw rod 6 compression spring 3 is set; Mud jacking hole 4 is set, the arranged outside unidirectional control device 8 in said mud jacking hole 4 with said uniaxial pressure piston 2 with bottom plate 5 corresponding valve body positions.
Distance L 1 between said uniaxial pressure piston and interface is 50-100mm; Said uniaxial pressure piston and the distance L 2 of going to the bottom between fixed head are 50-200mm; Said distance L 3 of going to the bottom between fixed head and underseal mouth is 50-100mm, and the diameter D of said valve body is 25.4-50.5mm.
Said unidirectional control device 8 is a rubber-like rubber, and said rubber is wrapped in the position in said mud jacking hole.
The principle of the utility model is: after pile body forms 24 hours; Pre-buried grouting pipe and grouting behind shaft or drift lining pipe valve by stake end and stake side are pressed into cement paste; Mud promotes the uniaxial pressure piston to the motion of valve body bottom, and cement paste overflows from the mud jacking hole, flows into the pile foundation bottom periphery; When mud jacking not, because the effect of unidirectional control device and spring, the outside object of pile foundation can't get in the pile body.
Claims (3)
1. pile bottom post-grouting device, it is characterized in that: comprise grouting pipe, grouting behind shaft or drift lining pipe valve, said grouting pipe is fixed in the reinforcing cage of pile foundation; Said grouting behind shaft or drift lining pipe valve comprises valve body; Said valve body one end is provided with interface and is connected with grouting pipe; The other end of said valve body is the underseal mouth, and the uniaxial pressure piston is set in the said valve body, and said uniaxial pressure piston and screw rod are fixed; Said screw rod is fixed on the fixed head of going to the bottom in the valve body through regulating pressure nut, between the outside, uniaxial pressure piston and the bottom plate of screw rod, compression spring is set; The mud jacking hole is set, the arranged outside unidirectional control device in said mud jacking hole with said uniaxial pressure piston and the corresponding valve body of bottom plate position.
2. device according to claim 1; It is characterized in that: the distance between said uniaxial pressure piston and interface is 50-100mm; Said uniaxial pressure piston and the distance of going to the bottom between fixed head are 50-200mm; Said distance of going to the bottom between fixed head and underseal mouth is 50-100mm, and the diameter of said valve body is 25.4-50.5mm.
3. device according to claim 1 is characterized in that: said unidirectional control device is a rubber-like rubber, and said rubber is wrapped in the position in said mud jacking hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201499668U CN202577307U (en) | 2012-04-11 | 2012-04-11 | Post grouting device of pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201499668U CN202577307U (en) | 2012-04-11 | 2012-04-11 | Post grouting device of pile foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202577307U true CN202577307U (en) | 2012-12-05 |
Family
ID=47246736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201499668U Expired - Fee Related CN202577307U (en) | 2012-04-11 | 2012-04-11 | Post grouting device of pile foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202577307U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114576A (en) * | 2013-02-05 | 2013-05-22 | 山西太行建设开发有限公司 | Post grouting construction method for cast-in-place concrete pile |
| CN103573274A (en) * | 2013-11-11 | 2014-02-12 | 浙江大学 | Steel sleeve grouting reinforcement device for settlement control over shield tunnel of soft foundation |
| CN106759290A (en) * | 2017-03-19 | 2017-05-31 | 马鞍山宏泰建材股份有限公司 | A kind of grouting behind shaft or drift lining pile foundation and its grouting method |
-
2012
- 2012-04-11 CN CN2012201499668U patent/CN202577307U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114576A (en) * | 2013-02-05 | 2013-05-22 | 山西太行建设开发有限公司 | Post grouting construction method for cast-in-place concrete pile |
| CN103573274A (en) * | 2013-11-11 | 2014-02-12 | 浙江大学 | Steel sleeve grouting reinforcement device for settlement control over shield tunnel of soft foundation |
| CN103573274B (en) * | 2013-11-11 | 2016-01-20 | 浙江大学 | Soft foundation shield tunnel subsidence controls steel sleeve grouting and reinforcing device |
| CN106759290A (en) * | 2017-03-19 | 2017-05-31 | 马鞍山宏泰建材股份有限公司 | A kind of grouting behind shaft or drift lining pile foundation and its grouting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20140411 |