CN104074195A - Method for controlling sedimentation of ground outside foundation pit through horizontal grouting - Google Patents
Method for controlling sedimentation of ground outside foundation pit through horizontal grouting Download PDFInfo
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- CN104074195A CN104074195A CN201410344924.3A CN201410344924A CN104074195A CN 104074195 A CN104074195 A CN 104074195A CN 201410344924 A CN201410344924 A CN 201410344924A CN 104074195 A CN104074195 A CN 104074195A
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- surface settlement
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Abstract
The invention provides a method for controlling the sedimentation of ground outside a foundation pit through horizontal grouting. According to the method, horizontal sealed tubes are embedded in a diaphragm wall in advance when the diaphragm wall is constructed; during the foundation pit excavation process, when the ground sediments greatly, in the positions, where the sealed tubes are embedded in advance or in the preset grouting positions of support pile seams, a grouting pipe is horizontally embedded in soil in an active region, and then horizontal grouting is performed from the interior of the foundation pit to the soil in the active region outside the foundation pit. According to the invention, horizontal grouting is performed from inside to outside of the foundation pit, so that ground loss of the active region can be compensated, and the sedimentation of soil outside the foundation pit can be reduced; in addition, the horizontal pipes are embedded in advance, and real-time and layered horizontal grouting can be performed according to the conditions of sedimentation of the soil outside the foundation pit and the foundation pit excavation working condition, so that the sedimentation of ground outside the foundation pit can be effectively controlled in real time.
Description
Technical field
The present invention relates to a kind of method of controlling the outer surface settlement of foundation ditch, specifically during a kind of excavation of foundation pit by soldier pile within the walls side direction foundation ditch implement layering horizontal grouting outward to control the method for surface settlement.
Background technology
In Soft Deep Foundation Pit digging process, due to the displacement of supporting piling wall, hole end uplift of soil, foundation pit dewatering etc., foundation ditch there will be Stratum Loss outward, produces surface settlement.In base pit engineering, generally take to strengthen supporting piling wall building-in depth, increase support stiffness, reinforce the method control surface settlement such as the passive area soil body, subregion piecemeal excavation.But said method is all " controlling in advance " to surface settlement, once monitored data shows the outer soil body rate of settling in hole, has enlarged markedly or produced larger sedimentation, and said method is all difficult to control timely and effectively surface settlement again.
Slip casting method is mainly used in stratum consolidation, surrounding enviroment protection tracking grouting, the aspects such as leak stopping of speedily carrying out rescue work in base pit engineering.Aspect surrounding enviroment protection tracking grouting; tracking grouting can be compensated Stratum Loss slip casting, passive area slip casting or be corrected the distortion that foundation ditch Adjacent Buildings, pipeline etc. are controlled in distortion slip casting effectively by active region; no matter but any tracking grouting mode, existing tracking grouting is all vertical slip casting or oblique slip casting.While controlling surface settlement, settlement Control scope is larger, if adopt vertical or oblique slip casting, the row of injected hole can increase a lot, and slip casting operates outward at foundation ditch, needs enough foundation ditches construction space outward.
Summary of the invention
In order to overcome the deficiency of the outer ground of existing control foundation ditch sedimentation method, the invention provides a kind of method of controlling surface settlement by horizontal grouting, the method when surface settlement is larger outside hole, can promptly be brought into play the effect of control surface settlement.
In Excavation Process, deep soil is realized existing Stratum Loss, in the larger region of Stratum Loss, carries out horizontal grouting, and slurries can play the effect of filling, compensation active region Stratum Loss; The grouting pressure producing during slip casting can make the injected hole top soil body have on certain to lift, and then reduces ground settlement; In addition, injecting cement paste is equivalent to the effect of reinforced earth to a certain extent, can improve the outer soil deformation characteristic in hole.
The technical solution adopted in the present invention is: during ground-connecting-wall fabrication of reinforcing cage, in the default slip casting of ground-connecting-wall position, horizontal seal pipe is installed; During ground-connecting-wall construction, horizontal seal pipe is followed reinforcing cage and is together transferred; Concreting subsequently, completes the pre-buried process of sealed tube.In soil excavation process, when surface settlement is larger, on ground-connecting-wall, pre-buried sealed tube position is inserted Grouting Pipe level in the active region soil body, carries out subsequently horizontal grouting; According to excavation of foundation pit operating mode, respectively in soldier pile diverse location carrying out horizontal slip casting within the walls.When foundation ditch adopts soldier pile supporting, horizontal grouting position is arranged on soldier pile stake seam place, when surface settlement is larger, can directly in default slip casting position, carry out horizontal grouting.
Compared with prior art, the invention has the beneficial effects as follows, can realize layering horizontal grouting according to excavation of foundation pit operating mode, and in foundation ditch, the horizontal grouting execution conditions outside foundation ditch are desirable, without the outer construction space of foundation ditch, workable.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the present invention is further described.
Fig. 1 controls the drawing in side sectional elevation of the surface settlement that excavation of foundation pit causes by horizontal grouting.
Fig. 2 controls the longitudinal plan of the surface settlement that excavation of foundation pit causes by horizontal grouting.
1. roads in figure, 2. ground-connecting-wall, 3. horizontal seal pipe, 4. injecting cement paste, 5. grit, 6. support, 7. base plate.
The specific embodiment
According to the protection of foundation ditch surrounding enviroment (1), require to determine pre-range of grouting, according to the excavation of foundation pit degree of depth, support arrangement situation, construction convenience etc., the position of horizontal grouting point is arranged on to each layer of support (6) top.At ground-connecting-wall (2) predeterminated position, pre-buried horizontal seal pipe (3) and ground-connecting-wall reinforcing cage are connected and fixed, horizontal tube two ends should seal reliably, when preventing ground-connecting-wall disturbing concrete, concrete enters steel pipe, after treating ground-connecting-wall grooving, transfer reinforcing cage and embedded steel tube, subsequently concrete perfusion.
In soil excavation process, need ground-connecting-wall distortion, surface settlement etc. tightly to monitor, once monitored data demonstration supporting piling wall distortion or surface settlement, advance the speed greatly or increase to certain value, the pre-buried sealed tube position that is engraved in excavation face top is inserted Grouting Pipe level in the active region soil body, carry out subsequently horizontal grouting, below ground, form horizontal grouting body (4).After slip casting finishes the last time, must adopt an effective measure, horizontal seal pipe is sealed.
Claims (3)
1. control a method for the outer surface settlement of foundation ditch, it is characterized in that by by foundation ditch outside foundation ditch the layering horizontal grouting of the active region soil body control surface settlement.
2. the method for the outer surface settlement of control foundation ditch according to claim 1, is characterized in that: according to default slip casting position, bury horizontal seal pipe in ground-connecting-wall underground, sealed tube and ground-connecting-wall reinforcing cage are connected and fixed; When surface settlement is larger, in ground-connecting-wall pre-buried sealed tube position or the default slip casting of soldier pile seam position, Grouting Pipe level is inserted in the active region soil body, carry out subsequently horizontal grouting.
3. the method for the outer surface settlement of control foundation ditch according to claim 1, is characterized in that: the position of horizontal grouting point is arranged on each layer of support top, according to excavation of foundation pit operating mode, respectively in soldier pile diverse location carrying out horizontal slip casting within the walls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410344924.3A CN104074195B (en) | 2014-07-21 | 2014-07-21 | A kind of method controlling the outer surface subsidence of foundation ditch by horizontal grouting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410344924.3A CN104074195B (en) | 2014-07-21 | 2014-07-21 | A kind of method controlling the outer surface subsidence of foundation ditch by horizontal grouting |
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| CN104074195A true CN104074195A (en) | 2014-10-01 |
| CN104074195B CN104074195B (en) | 2016-08-17 |
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| CN201410344924.3A Active CN104074195B (en) | 2014-07-21 | 2014-07-21 | A kind of method controlling the outer surface subsidence of foundation ditch by horizontal grouting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106120811A (en) * | 2016-08-24 | 2016-11-16 | 中天建设集团有限公司天津分公司 | A kind of foundation ditch periphery distortion preventing and deviation rectification construction method |
| CN108316283A (en) * | 2018-01-25 | 2018-07-24 | 天津大学 | The devices and methods therefor of influence of foundation excavation is controlled using hole rising pouring slurry ground-connecting-wall |
| CN113699998A (en) * | 2021-05-07 | 2021-11-26 | 金华职业技术学院 | Method for controlling foundation pit settlement deviation |
| CN114687345A (en) * | 2022-04-28 | 2022-07-01 | 浙江华展工程研究设计院有限公司 | Method for repairing surface subsidence or deformation of underground pipe outside foundation pit enclosure wall |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106120811A (en) * | 2016-08-24 | 2016-11-16 | 中天建设集团有限公司天津分公司 | A kind of foundation ditch periphery distortion preventing and deviation rectification construction method |
| CN108316283A (en) * | 2018-01-25 | 2018-07-24 | 天津大学 | The devices and methods therefor of influence of foundation excavation is controlled using hole rising pouring slurry ground-connecting-wall |
| CN113699998A (en) * | 2021-05-07 | 2021-11-26 | 金华职业技术学院 | Method for controlling foundation pit settlement deviation |
| CN114687345A (en) * | 2022-04-28 | 2022-07-01 | 浙江华展工程研究设计院有限公司 | Method for repairing surface subsidence or deformation of underground pipe outside foundation pit enclosure wall |
Also Published As
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| CN104074195B (en) | 2016-08-17 |
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Address after: 315010 496 Xin Dian Road, Haishu District, Zhejiang, Ningbo Applicant after: ZHEJIANG HUAZHAN INSTITUTE OF ENGINEERING RESEARCH AND DESIGN Address before: 315010 Zhejiang Province, Ningbo city Haishu District Baoshan Road No. 166 Applicant before: ZHEJIANG HUAZHAN INSTITUTE OF ENGINEERING RESEARCH AND DESIGN |
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Address after: 315000 No.496, Xindian Road, Haishu District, Ningbo City, Zhejiang Province Patentee after: Zhejiang Huazhan Research and Design Institute Co.,Ltd. Address before: No. 496, Xindian Road, Haishu District, Ningbo City, Zhejiang Province, 315010 Patentee before: ZHEJIANG HUAZHAN INSTITUTE OF ENGINEERING RESEARCH AND DESIGN |
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