CN2663516Y - Back pressing slurry injecting device to side and bottom of pile in drilling caisson pile procession - Google Patents
Back pressing slurry injecting device to side and bottom of pile in drilling caisson pile procession Download PDFInfo
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- CN2663516Y CN2663516Y CN 200320101721 CN200320101721U CN2663516Y CN 2663516 Y CN2663516 Y CN 2663516Y CN 200320101721 CN200320101721 CN 200320101721 CN 200320101721 U CN200320101721 U CN 200320101721U CN 2663516 Y CN2663516 Y CN 2663516Y
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- grouting
- pile
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- tube
- grouting pipe
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Abstract
The utility model discloses a mud jacking and grouting device from pile sides and bottom of drilling filling pile, which comprises a grouting pump, a grouting hose and a grouting tube which are connected orderly. The grouting tube is provided with grouting holes provided with unilateral grouting valves, and bottom of the grouting tube is connected with a conical cone head; lower end of the grouting tube is connected with a section of steel tube whose lateral wall is provided with the grouting holes; the section of the tube wall provided with the grouting holes is sleeved with a section of elastic rubber coating; a grouting piston is arranged in the grouting tube, and a spring is connected below the grouting piston; lower end of the spring is fixed at the bottom of the grouting tube, which forms a double proofed unilateral grouting valve. The grouting tube comprises at least two pile side grouting tubes and at least two pile bottom grouting tubes. The pile side grouting tubes are arranged evenly in the circumference scale of the reinforcing steel bar cage, and the two pile bottom grouting tubes are arranged symmetrically, wherein, one pile bottom grouting tube is a secondary grouting tube. The utility model improves effectively the bearing capacity of pile bottom, and the lateral frictional resistance of the pile body and the soil, and solves the problems of failure of grouting due to the damage of the grouting valve.
Description
Technical field
The utility model relates to a kind of in construction work, municipal bridge engineering foundation construction, bored pile slip casing by pressure equipment.
Background technology
Highrise building adopts bored pile foundation mostly at present, in the hope of reaching the requirement of design bearing capacity and sedimentation.And the shortcoming of bored pile technology maximum is: 1, pile bottom sediment is difficult to clean out, and reduces stake end load, adds the timber pile settling amount; 2, adopt mud off to make stake week produce one deck mud skin, thereby reduced the side friction between the stake and the soil body.For avoiding above-mentioned factor affecting, often reduce stake, the native side coefficient of friction resistance during design or be designed to mainly with friction pile, make usefulness or have to pass through abundant saturability soil layer to hard weathered layer, sand pebble layer or rock stratum for reaching good bearing stratum thereby ignore end.Therefore, the bored pile diameter of design is big, stake is long long, causes constructional difficulties, strengthens construction costs.By at the bottom of the stake, stake rear flank slurry injection technique improved pile side friction, bearing capacity of pile tip and reached and shorten the effect that stake is long, reduce sedimentation.Because existing back mud jacking grouting device and construction technology are difficult to stable raising bearing capacity and control settling amount, often do not reach expected effect.
In existing construction process of bored concrete pile, " pile end and the stake side slip casting method " that Chinese patent application number is 94101460.6, publication number is CN1107535A improves the shortcomings and deficiencies of the pile end grouting method (No. 2331646, French Patent (FRP) manual) of French Fondedile; " side rear grouting of compresol pile device and the technology " that Chinese patent application number is 00100760.2, publication number is CN1319701A by at the bottom of the stake, stake rear flank mud jacking, improved pile side friction, bearing capacity of pile tip and reached and shorten the effect that stake is long, reduce sedimentation.But the side friction of stake end bearing capacity, pile body and soil needs further to strengthen; Existing grouting equipment comprises grouting pump, slip casting flexible pipe and the Grouting Pipe that is linked in sequence, and Grouting Pipe has injected hole, and the unidirectional grout valve is arranged on the injected hole, and the unidirectional grout valve is by valve plate or bump pearl, rubber is formed, and occurs the problem of slurry reflux sometimes.
The utility model content
The purpose of this utility model provides a kind of bored pile stake side, pile bottom post grouting grouting equipment, and the side friction that solves an end bearing capacity, pile body and soil needs the further problem that improves, and solution destroys the problem that causes injection slurry to reflux because of grouting valve.
The utility model bored pile stake side, the pile bottom post grouting grouting equipment, comprise the grouting pump that is linked in sequence, slip casting flexible pipe and Grouting Pipe, Grouting Pipe has injected hole, the unidirectional grout valve is arranged on the injected hole, it is characterized in that: the bottom of Grouting Pipe connects conical conehead, the Grouting Pipe lower end connects the steel pipe that is distributed with injected hole on one section sidewall, have on this section steel pipe tube wall of injected hole and be with one section elastic caoutchouc cover, Grouting Pipe is built-in with a slip casting piston, connect a spring below the slip casting piston, the bottom of Grouting Pipe is fixed in the spring lower end, forms dual fail-safe unidirectional grout valve.
Above-mentioned Grouting Pipe comprises Grouting Pipe at the bottom of at least two pile side Grouting Pipe and at least two piles, and a stake side Grouting Pipe is evenly arranged in the reinforcing cage circumference range, Grouting Pipe symmetric arrangement at the bottom of two piles, and wherein one is the secondary grouting pipe.
Spacing between above-mentioned each side slip casting mouth of pipe is one to two meter.
Above-mentioned stake side Grouting Pipe termination places a side weak soil layer.
The outstanding downwards reinforcing cage of above-mentioned pile grouting pipe, deeply the power soil layer is held at the stake end in its termination.
Beneficial effect: the utility model is all arranged Grouting Pipe at stake side, the stake end, has both improved bearing capacity of pile tip, improves pile side friction again; The actual conditions that the utility model changes according to different soil, pile grouting pipe, stake side Grouting Pipe grouting port are carried out rational elevation and distribute, compare with existing post-grouting technology, both economical with materials is at the bottom of making again, stake side pressure slurry effect and bearing capacity greatly improve; The utility model is mixed an amount of micro-expanding agent (anhydrous calcium sulphoaluminate+gypsum) in slurries, can make the more conventional grouting serous fluid filling of slurries space more closely knit.The utility model is used the pile grouting pipe immediately and is carried out high-voltage secondary slip casting after first grouting serous fluid final set, also claims fracture grouting, and existing once grouting technology is compared, and slurries densification influence basin further enlarges, and effect strengthens greatly.The utility model has been used dual fail-safe unidirectional grout valve, make grouting valve can obtain dual control, have the grouting behind shaft or drift lining grouting valve now and compare, improved the survival rate of slip casting greatly, avoided the stake end, stake side to cause the possibility of slip casting failure because of grouting valve destroys basically.The utility model can significantly, effectively, stably improve the bearing capacity of pile body under the situation that does not change the foundation pile design parameters, and the control sedimentation.Can be applicable to construction work and municipal bridge engineering, be mainly used in the bearing capacity that improves body basis, building and bridge foundation.
The utility model has following advantage: (1) equipment making is simple, with low cost; (2) rationally in longitudinal extent, lay the side direction madjack pipe according to the difference of soil layer, can improve pile body and native side friction effectively targetedly; (3) by in slurries, suitably mixing micro-expanding agent, with soil body hole fill more closely knit, improved the bearing capacity of stake.(4) mud jacking adopts secondary splitting grouting technology, effectively improves stake end bearing capacity and pile side friction.(5) use dual fail-safe unidirectional grout valve, guaranteed the survival rate of mud jacking equipment.
Description of drawings
Fig. 1 is that the utility model bored pile stake side, pile bottom post grouting grouting equipment are arranged schematic diagram;
Fig. 2 is that the Grouting Pipe elevation distributes and position view;
Fig. 3 is the schematic diagram that Grouting Pipe is connected with reinforcing cage;
Fig. 4 is the utility model bored pile stake side, pile bottom post grouting grouting equipment dual fail-safe unidirectional grout valve arrangement schematic diagram.
The specific embodiment
As shown in Figure 1, 2, 3, the utility model bored pile stake side, pile bottom post grouting grouting device comprise grouting pump 1, slip casting flexible pipe 2 and the Grouting Pipe 3 that is linked in sequence, grouting pump 1 is connected with pressure meter 18, Grouting Pipe 3 comprises Grouting Pipe 11 at the bottom of three pile side Grouting Pipe 10 and two piles, three pile side Grouting Pipe 10 are evenly arranged in reinforcing cage 12 circumference range, are equilateral triangle basically; Grouting Pipe 11 symmetric arrangement at the bottom of two piles, wherein one is standby pipes or uses as fracture grouting.Pile grouting pipe 11 should grow reinforcing cage 20～30cm, makes its root go deep in the drill bit influence basin of hole bottom soil layer and stretches into bearing stratum, for example can extend boulder bed 17, to reach slip casting effect preferably.According to argillic horizon 15, sand layer 16, boulder bed 17 geology distribution situations, the stake side slip casting mouth of pipe the distribution on the elevation should be big at transmission coefficient, can reach in the sand layer 16 elevation scope of slip casting effect preferably, stake side Grouting Pipe is generally 3, corresponding weak soil layer can be imbedded in its termination, for example powder fine sand soil layer or detail sand layer, make cement grout 13 can make slip casting effect in the better local enhancing of soil layer simultaneously again in pile body 14 and the injection more uniformly on every side of the stake end.Secondary splitting grouting: after first grouting serous fluid final set, slurries have certain densification effect to surrounding soil.Carry out high-voltage secondary slip casting work immediately, slurries in the hole along with the increase of grouting pressure, when pressure acquires a certain degree, slurry makes the stratum produce splitting, form veiny or ribbon adhesive bond, make slurries densification influence basin further enlarge, effect strengthens.
The utility model bored pile stake side, the pile bottom post grouting grouting device comprises the grouting pump 1 that is linked in sequence, slip casting flexible pipe 2 and Grouting Pipe 3, Grouting Pipe 3 comprises Grouting Pipe 11 at the bottom of three pile side Grouting Pipe 10 and two piles, as shown in Figure 4, Grouting Pipe has injected hole 4, the unidirectional grout valve is arranged on the injected hole, the bottom of its Grouting Pipe connects conical conehead 5, the Grouting Pipe lower end connects the steel pipe 6 that is distributed with injected hole on one section sidewall, have and be with one section elastic caoutchouc cover 7 on this section steel pipe tube wall of injected hole, Grouting Pipe is built-in with a slip casting piston 8, connect a spring 9 below the slip casting piston, the bottom of Grouting Pipe is fixed in the spring lower end, forms dual fail-safe unidirectional grout valve.Cement grout is after Grouting Pipe is injected, increase along with pressure, slip casting piston compression spring moves downward, injected hole exposes, and cement grout outwards sprays from injected hole and carries out slip casting, treat that grouting pressure reduces after, the resilience under the spring force effect of slip casting piston, injected hole is shut, and cement grout can not reflux, and reaches the slip casing by pressure effect.The second road safeties of this device are the elastic caoutchouc cover, stop slurry reflux, have guaranteed the survival rate of slip casing by pressure.
Claims (5)
1, a kind of bored pile stake side, the pile bottom post grouting grouting equipment, comprise the grouting pump that is linked in sequence, slip casting flexible pipe and Grouting Pipe, Grouting Pipe has injected hole, the unidirectional grout valve is arranged on the injected hole, it is characterized in that: the bottom of Grouting Pipe connects conical conehead, the Grouting Pipe lower end connects the steel pipe that is distributed with injected hole on one section sidewall, have on this section steel pipe tube wall of injected hole and be with one section elastic caoutchouc cover, Grouting Pipe is built-in with a slip casting piston, connect a spring below the slip casting piston, the bottom of Grouting Pipe is fixed in the spring lower end, forms dual fail-safe unidirectional grout valve.
2, bored pile stake side according to claim 1, pile bottom post grouting grouting equipment, it is characterized in that: described Grouting Pipe comprises Grouting Pipe at the bottom of at least two pile side Grouting Pipe and at least two piles, stake side Grouting Pipe is evenly arranged in the reinforcing cage circumference range, Grouting Pipe symmetric arrangement at the bottom of two piles, wherein one is the secondary grouting pipe.
3, bored pile stake side according to claim 2, pile bottom post grouting grouting equipment is characterized in that: the spacing between described each side slip casting mouth of pipe is one to two meter.
4, according to claim 2 or 3 described bored pile stake sides, pile bottom post grouting grouting equipment, it is characterized in that: described stake side Grouting Pipe termination places a side weak soil layer.
5, bored pile stake side according to claim 2, pile bottom post grouting grouting equipment is characterized in that: the outstanding downwards reinforcing cage of described pile grouting pipe, deeply the power soil layer is held at the stake end in its termination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320101721 CN2663516Y (en) | 2003-10-30 | 2003-10-30 | Back pressing slurry injecting device to side and bottom of pile in drilling caisson pile procession |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320101721 CN2663516Y (en) | 2003-10-30 | 2003-10-30 | Back pressing slurry injecting device to side and bottom of pile in drilling caisson pile procession |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2663516Y true CN2663516Y (en) | 2004-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320101721 Expired - Fee Related CN2663516Y (en) | 2003-10-30 | 2003-10-30 | Back pressing slurry injecting device to side and bottom of pile in drilling caisson pile procession |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2663516Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277876A (en) * | 2011-05-17 | 2011-12-14 | 石家庄铁道大学 | Multifunctional pile-raft foundation and construction process thereof |
| CN102587358A (en) * | 2012-03-27 | 2012-07-18 | 河海大学 | Technology of high polymer material post-grouting squeezed cast-in-place pile |
| CN102605770A (en) * | 2012-03-14 | 2012-07-25 | 中冶交通工程技术有限公司 | Post grouting device for filling pile and construction method |
| CN101333812B (en) * | 2008-08-04 | 2013-06-12 | 上海市基础工程有限公司 | Grouter for back side grouting and its construction method |
| CN104018808A (en) * | 2014-05-24 | 2014-09-03 | 安徽淮河化工股份有限公司 | Single-way valve device for coal mine gas pumping-discharging hole slurry grouting pocket hole sealing machine |
| CN104389308A (en) * | 2014-10-17 | 2015-03-04 | 中建四局第六建筑工程有限公司 | Construction method of cast-in-situ stiff piles for foundation pit supporting |
| CN104452746A (en) * | 2013-09-23 | 2015-03-25 | 中国建筑股份有限公司上海分公司 | Construction method for bored pile |
| CN107237319A (en) * | 2017-06-20 | 2017-10-10 | 中冶天工集团有限公司 | A kind of pile tube with post jacking Grouting Pipe and its construction method |
| CN110499765A (en) * | 2019-09-12 | 2019-11-26 | 中冶京诚工程技术有限公司 | Pile end grouting spray head |
| CN111119174A (en) * | 2019-12-31 | 2020-05-08 | 中交路桥建设有限公司 | Prestressed anchor cable structure for repeated splitting grouting and construction method thereof |
| CN114482057A (en) * | 2021-12-27 | 2022-05-13 | 佛山科学技术学院 | Control device and method for pile side grouting reinforcement of pipe pile foundation |
-
2003
- 2003-10-30 CN CN 200320101721 patent/CN2663516Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101333812B (en) * | 2008-08-04 | 2013-06-12 | 上海市基础工程有限公司 | Grouter for back side grouting and its construction method |
| CN102277876A (en) * | 2011-05-17 | 2011-12-14 | 石家庄铁道大学 | Multifunctional pile-raft foundation and construction process thereof |
| CN102605770A (en) * | 2012-03-14 | 2012-07-25 | 中冶交通工程技术有限公司 | Post grouting device for filling pile and construction method |
| CN102605770B (en) * | 2012-03-14 | 2015-06-10 | 中冶交通工程技术有限公司 | Post grouting device for filling pile and construction method |
| CN102587358A (en) * | 2012-03-27 | 2012-07-18 | 河海大学 | Technology of high polymer material post-grouting squeezed cast-in-place pile |
| CN104452746A (en) * | 2013-09-23 | 2015-03-25 | 中国建筑股份有限公司上海分公司 | Construction method for bored pile |
| CN104018808A (en) * | 2014-05-24 | 2014-09-03 | 安徽淮河化工股份有限公司 | Single-way valve device for coal mine gas pumping-discharging hole slurry grouting pocket hole sealing machine |
| CN104389308A (en) * | 2014-10-17 | 2015-03-04 | 中建四局第六建筑工程有限公司 | Construction method of cast-in-situ stiff piles for foundation pit supporting |
| CN107237319A (en) * | 2017-06-20 | 2017-10-10 | 中冶天工集团有限公司 | A kind of pile tube with post jacking Grouting Pipe and its construction method |
| CN110499765A (en) * | 2019-09-12 | 2019-11-26 | 中冶京诚工程技术有限公司 | Pile end grouting spray head |
| CN110499765B (en) * | 2019-09-12 | 2024-02-06 | 中冶京诚工程技术有限公司 | Pile end grouting spray head |
| CN111119174A (en) * | 2019-12-31 | 2020-05-08 | 中交路桥建设有限公司 | Prestressed anchor cable structure for repeated splitting grouting and construction method thereof |
| CN114482057A (en) * | 2021-12-27 | 2022-05-13 | 佛山科学技术学院 | Control device and method for pile side grouting reinforcement of pipe pile foundation |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |