CN1235226A - Method for protecting support of foundation ditch by mud jacking for retaining and water inhibiting and apparatus for mud jacking - Google Patents
Method for protecting support of foundation ditch by mud jacking for retaining and water inhibiting and apparatus for mud jacking Download PDFInfo
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- CN1235226A CN1235226A CN 99116456 CN99116456A CN1235226A CN 1235226 A CN1235226 A CN 1235226A CN 99116456 CN99116456 CN 99116456 CN 99116456 A CN99116456 A CN 99116456A CN 1235226 A CN1235226 A CN 1235226A
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- campshed
- mud jacking
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Abstract
A foundation ditch supporting method and grout-pressing apparatus for first pouring pile after pressing grout technology features that it includes such steps as burying two vertially arranged grout pressing pipe having many grout spraying holes between the hole wall of each row of pile holes and reinforcing bar cage, pouring concrete into row of pile holes, pressing water into grout pressing pipes within 18 hr to open the grout spraying holes, and pressing cement grout into grout pressing pipes to form compact wedges in the gaps between piles to stop earth and water.
Description
The present invention relates to industry and civilian construction deep foundation pit support job practices and isolated plant thereof, specifically a kind of filling pile ' s after grouting keeps off two-in-one foundation pit supporting method of native sealing and squeezing unit.
At present, deep foundation pit support technology kind is a lot of in building field, is " campshed+cement mixing pile support technology " with the immediate background technology of the present invention.This technology is around deep foundation ditch the perfusion campshed to be set, and is provided with double behind campshed even many drainings mud agitation pile, finishes retaining soil and water sealing operation respectively.Though this technology is widely adopted, there are the following problems for it.
1, perfusion campshed and cement mixing pile belong to two kinds of stake types, will adopt two kinds of technologies when construction, and therefore two kinds of equipment need bigger place and long duration, and cost is higher.
2, owing to the defective of cement mixing pile technology self, the verticality of sealing heap curtain is difficult to assurance, therefore, the water-stop curtain continuity that the double even many drainings mud agitation pile that is provided with behind campshed forms is relatively poor, stagnant water effect is bad, cause a lot of deep pit diggings after, the situation of leaking often appears.
When 3, powder spray piling is constructed a large amount of dust is arranged, cause environment pollution.
4, in construction, when cement mixing pile is met underground miscellaneous fill or building waste, be difficult to pile; Meeting underground utilities has the situation of seepage, and the cement mixing pile pile body is local can to form the cavity, and local pile body can't moulding, easily causes percolating water.
Goal of the invention of the present invention is in order to solve the deficiency that the above-mentioned background technology exists, and proposes a kind of simple to operately, with low cost, and good filling pile ' s after grouting keeps off the two-in-one foundation pit supporting method of native sealing to keep off native stagnant water effect.
Foregoing invention purpose of the present invention is realized by following technical scheme: a kind of filling pile ' s after grouting keeps off the two-in-one foundation pit supporting method of native sealing, beat the campshed hole around being included in deep foundation ditch, in each campshed hole, place reinforcing cage, special character of the present invention is at first to bury two madjack pipes vertically arranged and lower end blocks underground between the hole wall in each campshed hole and reinforcing cage, two madjack pipe symmetric arrangement, and being positioned at the campshed back, they become 20-25 ° with the line P at campshed center with the angle α between the campshed center line OO '; Tube wall upper edge at madjack pipe vertically is provided with many mouth sprays, and the spout direction of mouth spray becomes 20-25 ° with angle between the campshed center line OO '.Concrete perfusion in the campshed hole that is equipped with reinforcing cage and madjack pipe then, and in 18 hours in madjack pipe injection pressure water the mouth spray spray is opened; In each madjack pipe, be pressed into cement grout at last, make in the campshed gap to form fine and close wedge shape filler block of combining closely with campshed.
In such scheme, the madjack pipe between adjacent two can select that one is long and the other is short or two long tubes according to the soil layer situation, in the mud jacking process earlier to the short tube mud jacking, treat that it reaches certain intensity and form upper cover layer after, again to the long tube mud jacking.
In such scheme, when mud jacking, work as the mud jacking quantity not sufficient, when slurries are but gushed out the face of land, it is ineffectual continuing mud jacking, should stop mud jacking 2-3 hour, when treating its mobile reduction, again mud jacking slurries in the madjack pipe that swap out, again after 2-3 hour in madjack pipe mud jacking.
In such scheme,, when mud jacking, should take the order mud jacking of 4 pile mud jacking at interval for the face of land of emerging, the same place of the before pouring mortar pile of slurries that prevents the back pouring mortar pile.
Another goal of the invention of the present invention is to propose to keep off the two-in-one pattern foundation pit supporting structure squeezing unit of native sealing with the matching used a kind of filling pile ' s after grouting of above-mentioned foundation pit supporting method.
This goal of the invention of the present invention is realized by following technical scheme.A kind of filling pile ' s after grouting keeps off the two-in-one pattern foundation pit supporting structure squeezing unit of native sealing, form by reinforcing cage and madjack pipe, its special character is to be equipped with two vertical madjack pipes that are provided with along the reinforcing cage outer surface cloth, between madjack pipe and reinforcing cage, be welded with the reinforcing bar cushion block, guarantee the adjacent stake of madjack pipe hole inwall, madjack pipe upper end stretches out that 4 vertical reinforcing bars that extend ground surface weld with the stirrup of putting more energy in ground matrix section and the reinforcing cage, so that madjack pipe locks in the stake aperture.Two madjack pipes are arranged symmetrically in the reinforcing cage both sides, the line P at every madjack pipe center and campshed center all is positioned at the back of campshed center line OO ', become 20-25 ° with the angle α between the campshed center line OO ', vertical interval 20-30cm along every madjack pipe is furnished with mouth spray, and the spout direction of mouth spray becomes 20-25 ° with angle between the campshed center line OO '.
The present invention has following advantage:
1, retaining soil, sealing unite two into one, and process equipment is simple.
2, campshed, back mud jacking continuous productive process, the duration shortens about 30%, and occupied ground is little, adjoins original building 70cm and can construct, and this is that background technology is beyond one's reach.
3, compliance is strong, and the soil layer and the place of every suitable drill-pouring construction also can be applicable to the present invention.
4, stagnant water effect is good.Because campshed gap little (20-30cm is only arranged), therefore, during slip casing by pressure, slurries have certain oozing to expand and dissection to the soil body, combine closely in the cement grout energy and the scraggly outside of campshed, form the good wedge shape filler block of stress, the transmission coefficient of this wedge shape filler block reaches below the 10-7cm/S, for each space in the campshed, two madjack pipes is arranged along the slip casting of pile body porous respectively, form dual fail-safe, do not stay the blind area.
5, non-environmental-pollution.
6, back of the present invention mud jacking sealing cost than the low 30%-50% of cement mixing pile water-stop curtain in the background technology about.
Bigger during 7, owing to pressure grouting to the influence basin of the soil body, therefore, the soil body of the present invention after to campshed has certain reinforcement effect, thereby reduces the active earth pressure in active earth pressure district, when the deep pit excavation of old building thing limit, back mud jacking can also work the effect of underpining to the old building thing.
Describe the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 is campshed and madjack pipe layout plan.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is reinforcing cage and madjack pipe arrangement diagram in the campshed hole.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is that reinforcing cage and madjack pipe are at stake aperture locking knot composition.
Fig. 6 is I-I sectional view of Fig. 5.
Fig. 7 is II-II sectional view of Fig. 5.
Referring to figs. 1 through Fig. 7, around deep foundation ditch, beat the campshed hole with rig, in each campshed hole, place reinforcing cage 1 and two madjack pipes 2, the lower end of madjack pipe 2 blocks, the mouth spray that vertically offers φ 6mm 4 along madjack pipe 2, madjack pipe 2 adopts 6 '-1 " steel pipe; because there are various soil layers in the foundation depth scope and its underpart; be the effect that guarantees water seepage prevention; the commute pervious layer should carry out emphasis slip casting; be that mouth spray should be aimed at pervious layer, madjack pipe 2 can be according to the soil layer situation, selects that one is long and the other is short or two long tubes; whenever on the madjack pipe therein evenly offer mouth spray at a distance of 20-30cm, the intensive mouth spray of offering is answered at the position of (short tube) corresponding pervious layer on another root madjack pipe, to increase stagnant water effect.
When placing reinforcing cage and madjack pipe, can earlier reinforcing cage and two madjack pipes be fixed, promptly vertically place several reinforcing bar cushion blocks 3 of madjack pipe place welding at the reinforcing cage external surface, madjack pipe 2 is welded on the reinforcing bar cushion block 3, guarantee 2 adjacent hole inwalls of madjack pipe, madjack pipe 2 upper ends are stretched out in ground matrix section and the reinforcing cage 4 vertical reinforcing bar 5 usefulness that extend ground surface stirrup 6 of putting more energy into and are welded, so that madjack pipe locks in the stake aperture.And then the reinforcing cage 1 and the madjack pipe 2 that connect put into the campshed hole together.Two madjack pipes are wanted symmetric arrangement, the line P at every madjack pipe center and campshed center all is positioned at the back of campshed center line OO ', they become 20-25 ° with angle α between the campshed center line OO ', and the mouth spray 4 of every madjack pipe 2 becomes 20-25 ° with angle between the campshed center line OO '.
After slip casting in the campshed hole, for the mouth spray 4 that prevents madjack pipe 2 is blocked by concrete, should be in 18 hours in madjack pipe 2 injection pressure water, mouth spray 4 sprays are opened.
In the mud jacking process, two madjack pipes of meeting that one is long and the other is short, should carry out mud jacking to the upper soil horizon short tube earlier, treat that it reaches (after 3 days) after certain intensity, after forming upper cover layer,, form " vexed spray " again to bottom soil layer long tube mud jacking, to increase back mud jacking stagnant water effect, can save cement simultaneously.
In the mud jacking process, when chance mud jacking quantity not sufficient, when slurries are but gushed out the face of land, should take " multiple press " mode, promptly stop mud jacking 2-3 hour, treat its mobile reduction after, again mud jacking slurries in the madjack pipe that swap out, again after 2-3 hour in madjack pipe mud jacking (the multiple pressure), to guarantee grouting result.
In the mud jacking process, for the face of land of emerging, the same place of the before pouring mortar pile of slurries that prevents the back pouring mortar pile,, should take the order of 4 pile mud jacking at interval to increase the mud jacking amount and to improve stagnant water effect, promptly mud jacking is 1#, 5#, 9# in proper order ...
Claims (5)
1, a kind of filling pile ' s after grouting keeps off the two-in-one foundation pit supporting method of native sealing, beat the campshed hole around being included in deep foundation ditch, in each campshed hole, place reinforcing cage, feature of the present invention is, at first burying two between the hole wall in each campshed hole and reinforcing cage underground is arranged vertically and madjack pipe that the lower end blocks, two madjack pipe symmetric arrangement, and be positioned at the campshed back, madjack pipe becomes 20-25 ° with the line P at campshed center with the angle α between the campshed center line OO ', tube wall upper edge at madjack pipe vertically is provided with many mouth sprays, and the spout direction of mouth spray becomes 20-25 ° with angle between the campshed center line OO '; Concrete perfusion in the campshed hole that is equipped with reinforcing cage and madjack pipe then, and in 18 hours in madjack pipe injection pressure water, the mouth spray spray is opened; In each madjack pipe, be pressed into cement grout at last, make in the campshed gap to form fine and close wedge shape filler block of combining closely with campshed.
2, keep off the two-in-one foundation pit supporting method of native sealing according to the described filling pile ' s after grouting of claim 1, it is characterized in that madjack pipe between adjacent two can select that one is long and the other is short or two long tubes according to the soil layer situation, in the mud jacking process, earlier to the short tube mud jacking, after treating that it reaches certain intensity and form upper cover layer, again to the long tube mud jacking.
3, keep off the two-in-one foundation pit supporting method of native sealing according to the described filling pile ' s after grouting of claim 1, it is characterized in that when mud jacking when the mud jacking quantity not sufficient, when slurries are but gushed out the face of land, it is ineffectual continuing mud jacking, should stop mud jacking 2-3 hour, when treating its mobile reduction, mud jacking slurries in the madjack pipe that swap out again, again after 2-3 hour in madjack pipe mud jacking.
4, keep off the two-in-one foundation pit supporting method of native sealing according to the described filling pile ' s after grouting of claim 1, it is characterized in that the face of land of emerging, should take the order of 4 pile mud jacking at interval for the same place of the before pouring mortar pile of slurries that prevents the back pouring mortar pile.
5, a kind of filling pile ' s after grouting keeps off the two-in-one pattern foundation pit supporting structure squeezing unit of native sealing, form by reinforcing cage and madjack pipe, it is characterized in that being equipped with two vertical madjack pipes that are provided with along the reinforcing cage outer surface cloth, between madjack pipe and reinforcing cage, be welded with the reinforcing bar cushion block, madjack pipe upper end stretches out that 4 vertical reinforcing bars that extend ground surface weld with the stirrup of putting more energy in ground matrix section and the reinforcing cage, above-mentioned two madjack pipes are arranged symmetrically in the reinforcing cage both sides, the line P at every madjack pipe center and campshed center all is positioned at the back of campshed center line OO ', and becomes 20-25 ° with angle α between the campshed center line OO '.Vertical interval 20-30cm along every madjack pipe is furnished with mouth spray, and the spout direction of this mouth spray becomes 20-25 ° with angle between the campshed center line OO '.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99116456 CN1113136C (en) | 1999-04-30 | 1999-04-30 | Method for protecting support of foundation ditch by mud jacking for retaining and water inhibiting and apparatus for mud jacking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99116456 CN1113136C (en) | 1999-04-30 | 1999-04-30 | Method for protecting support of foundation ditch by mud jacking for retaining and water inhibiting and apparatus for mud jacking |
Publications (2)
| Publication Number | Publication Date |
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| CN1235226A true CN1235226A (en) | 1999-11-17 |
| CN1113136C CN1113136C (en) | 2003-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99116456 Expired - Fee Related CN1113136C (en) | 1999-04-30 | 1999-04-30 | Method for protecting support of foundation ditch by mud jacking for retaining and water inhibiting and apparatus for mud jacking |
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| CN (1) | CN1113136C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104711989A (en) * | 2013-12-13 | 2015-06-17 | 国家电网公司 | Cast-in-place pile post-grouting retaining-sealing two-in-one foundation pit supporting method |
| CN107059881A (en) * | 2017-04-12 | 2017-08-18 | 广东省基础工程集团有限公司 | The foundation pit supporting method that a kind of campshed is combined with steel sheet pile |
| CN108951661A (en) * | 2018-08-31 | 2018-12-07 | 江苏东合南岩土科技股份有限公司 | The construction method of double cambered surface piling bars, underground support structure and underground support structure |
| CN108978694A (en) * | 2018-07-01 | 2018-12-11 | 北京工业大学 | A kind of precise guidance grouting method for construction water-stop curtain in tunnel |
| CN109113087A (en) * | 2018-07-24 | 2019-01-01 | 北京隧盾市政建设有限公司 | Hole pile water stopping curtain integral structure and its construction technology |
| CN109137948A (en) * | 2018-08-27 | 2019-01-04 | 北京住总集团有限责任公司 | Grouting behind shaft or drift lining occlusion water-stopping method and equipment between a kind of stake |
| CN112081112A (en) * | 2020-08-24 | 2020-12-15 | 浙江二十冶建设有限公司 | Construction method of foundation pit supporting pile under unfavorable geological condition |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804107A (en) * | 2016-05-10 | 2016-07-27 | 吉林大学 | High-pressure-jetting and anti-seepage treatment method for triple tube of joint of underground diaphragm wall |
-
1999
- 1999-04-30 CN CN 99116456 patent/CN1113136C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104711989A (en) * | 2013-12-13 | 2015-06-17 | 国家电网公司 | Cast-in-place pile post-grouting retaining-sealing two-in-one foundation pit supporting method |
| CN107059881A (en) * | 2017-04-12 | 2017-08-18 | 广东省基础工程集团有限公司 | The foundation pit supporting method that a kind of campshed is combined with steel sheet pile |
| CN108978694A (en) * | 2018-07-01 | 2018-12-11 | 北京工业大学 | A kind of precise guidance grouting method for construction water-stop curtain in tunnel |
| CN108978694B (en) * | 2018-07-01 | 2020-07-03 | 北京工业大学 | Accurate guidance grouting method for building waterproof curtain in tunnel |
| CN109113087A (en) * | 2018-07-24 | 2019-01-01 | 北京隧盾市政建设有限公司 | Hole pile water stopping curtain integral structure and its construction technology |
| CN109137948A (en) * | 2018-08-27 | 2019-01-04 | 北京住总集团有限责任公司 | Grouting behind shaft or drift lining occlusion water-stopping method and equipment between a kind of stake |
| CN109137948B (en) * | 2018-08-27 | 2020-12-11 | 北京住总集团有限责任公司 | Post-grouting interlocking water stopping method and equipment between piles |
| CN108951661A (en) * | 2018-08-31 | 2018-12-07 | 江苏东合南岩土科技股份有限公司 | The construction method of double cambered surface piling bars, underground support structure and underground support structure |
| CN108951661B (en) * | 2018-08-31 | 2020-09-01 | 江苏东合南岩土科技股份有限公司 | Double-arc-surface steel pile, underground supporting structure and construction method of underground supporting structure |
| CN112081112A (en) * | 2020-08-24 | 2020-12-15 | 浙江二十冶建设有限公司 | Construction method of foundation pit supporting pile under unfavorable geological condition |
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| Publication number | Publication date |
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| CN1113136C (en) | 2003-07-02 |
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