CN101864962A - Soft soil layer channel freezing underground excavation in-situ remediation construction method - Google Patents
Soft soil layer channel freezing underground excavation in-situ remediation construction method Download PDFInfo
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- CN101864962A CN101864962A CN201010172338A CN201010172338A CN101864962A CN 101864962 A CN101864962 A CN 101864962A CN 201010172338 A CN201010172338 A CN 201010172338A CN 201010172338 A CN201010172338 A CN 201010172338A CN 101864962 A CN101864962 A CN 101864962A
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a soft soil layer channel freezing underground excavation in-situ remediation construction method, which comprises the following steps: blocking both sides of a damaged section of a channel; filling cement-based grout into the damaged section of the channel; carrying out freezing reinforcement on the soil layer around the damaged section of the channel; cleaning the soil body and the cement-based grout in the damaged section of the channel; detecting the damage degree of the structure of the damaged section of the channel; and carrying out problem-oriented remediation. The invention does not need to dig the soil facing surface of the damaged section of the channel when the remediation construction of the damaged section of the channel is carried out through a freezing reinforcement mode on the soil layer ground the damaged section of the channel, the influence on the surrounding environment and the local floating deformation of the channel structure are avoided, and the construction risk is small.
Description
Technical field
The present invention relates to a kind of job practices, relate in particular to a kind of tunnel method for repairing and constructing.
Background technology
In recent years, along with developing rapidly of underground construction, tunnel structure situation about being damaged is more and more many in operation tunnel or the construction, need to damage a section tunnel structure repair guarantee safe in utilization.
At present, cut and cover tunneling is mainly adopted in the original position reparation in soft soil layer tunnel both at home and abroad, promptly by space enclosing structure or put and be repaired after the slope excavation will damaged tunnel structure exposes again.There is following problem in this method: the one, and cut and cover method need excavate tunnel structure and meet native face, and is big to the surrounding enviroment influence, bad adaptability, at Environmental sensitive areas such as business districts, city, this method is difficult to carry out; The 2nd, under the situation that the tunnel structure extent of damage is failed to understand, this method can not be tackled flexibly, and cut and cover method need be met tunnel structure could judge its damaged degree after native face exposes fully, and this is great waste to the damaged among a small circle situation in part; The 3rd, if influence under the rough sledding such as having artesian water in the scope of stratum, construction risk is bigger; The 4th, cut and cover method need be excavated tunnel structure stratum on every side, and there is a uninstall process strip tunnel structure part, and this will cause the part come-up distortion of tunnel structure, and this inhomogeneous deformation is very unfavorable to structure.
In view of above-mentioned factor, those skilled in the art is devoted to develop a kind of soft soil layer tunnel method for repairing and constructing, efficiently solves above-mentioned a series of problem, and economically feasible, has broad application prospects in the soft soil layer construction of tunnel.
Summary of the invention
Because the above-mentioned defective of prior art, technical problem to be solved by this invention provides a kind of soft soil layer tunnel freezing underground excavation in-situ method for repairing and constructing, when carrying out the tunnel repairing construction, need not to excavate tunnel structure and meets native face.
For achieving the above object, the invention provides a kind of soft soil layer tunnel freezing underground excavation in-situ method for repairing and constructing, it comprises following step:
(1) with both sides, the tunnel shutoff of breakage section, and in damaged section tunnel the filling and injecting slurry body;
(2) consolidation by freezing is carried out on stratum around the damaged section tunnel;
(3) soil body and injecting cement paste in the damaged section of the cleaning tunnel;
(4) detect damaged section tunnel structure damaged degree, carry out the specific aim reparation.
Soft soil layer of the present invention tunnel freezing underground excavation in-situ method for repairing and constructing, by stratum around the damaged section tunnel being carried out the mode of consolidation by freezing, make when carrying out breakage section tunnel repairing construction, need not to excavate damaged section tunnel structure and meet native face, avoided to adopt suitable reparation principle according to concrete damaged condition, avoided waste the influence of surrounding environment and the part come-up distortion of tunnel structure, reply flexibly, construction risk is little.
Be described further below with reference to the technique effect of accompanying drawing, to understand purpose of the present invention, feature and effect fully design of the present invention, concrete structure and generation.
Description of drawings
Fig. 1 is a flow chart of the present invention.
Fig. 2 carries out longitdinal cross-section diagram after shutoff and the slip casting to damaged section tunnel.
Fig. 3 carries out longitdinal cross-section diagram behind the consolidation by freezing to stratum around the damaged section tunnel.
Fig. 4 carries out view in transverse section behind the consolidation by freezing to stratum around the damaged section tunnel.
Fig. 5 clears up and sets up view in transverse section behind the bracing frame to the tunnel.
The specific embodiment
The invention will be further elaborated below in conjunction with accompanying drawing.
As shown in Figure 1, the invention provides a kind of soft soil layer tunnel freezing underground excavation in-situ method for repairing and constructing, be applicable to the reparation of soft clay area tunnel structure, be specially adapted to because tunnel structure damages the situation that causes stratum earth inflow on every side, stops up the tunnel.
This job practices comprises following step:
(1) with both sides, the tunnel shutoff of breakage section, and in damaged section tunnel the filling and injecting slurry body;
(2) soil layer around the damaged section tunnel is carried out consolidation by freezing;
(3) soil body and injecting cement paste in the damaged section of the cleaning tunnel;
(4) detect damaged section tunnel structure damaged degree, carry out the specific aim reparation.
As shown in Figure 2, in above-mentioned steps (1), in damaged section both sides, tunnel block wall 2 is set at a certain distance, punching to inject in damaged section tunnel by ground has the cement mortar 1 of certain independence, and makes cement mortar be full of whole damaged section tunnel.
As shown in Figure 3 and Figure 4, in above-mentioned steps (2), around the tunnel, set vertical or oblique freezing hole in the certain limit stratum by ground, adopt salt solution or liquid nitrogen freezing method that consolidation by freezing is carried out on the stratum, thereby form a hoop consolidation by freezing circle 3 around in the tunnel.Consolidation by freezing is little to the surrounding enviroment influence, and consolidation effect is easy to confirm simultaneously, fully guarantees engineering safety.Owing to be to stratum consolidation around the tunnel but not excavate unloading, the come-up distortion in tunnel can not take place.Carry out even DRIFT AND SEPARATION-PILE, can be guaranteed repairing construction safety for containing artesian aquifer behind consolidation by freezing, construction risk is little.
As shown in Figure 5, in above-mentioned steps (3), after consolidation by freezing is finished, remove a side seal wall, excavate the soil body and injecting cement paste in the tunnel, damaged block section, clear up by intact tunnel.Because the soil body and injecting cement paste also have certain intensity in the damaged section tunnel after freezing, adopt the Mine Method excavation to get final product.According to the concrete condition of tunnel breakage, in digging process, can in damaged section tunnel, set up bracing frame 4, to guarantee safety.
In above-mentioned steps (4), after excavation finishes, enter into and check the damaged situation of tunnel structure in the damaged section tunnel, adopt suitable reparation principle according to concrete damaged condition, avoid waste, flexibly reply.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that this area need not creative work and just can design according to the present invention make many modifications and variations.Therefore, all technician in the art all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (4)
1. soft soil layer tunnel freezing underground excavation in-situ method for repairing and constructing may further comprise the steps:
(1) with both sides, the tunnel shutoff of breakage section, and in described damaged section tunnel the filling and injecting slurry body;
(2) consolidation by freezing is carried out on stratum around the described damaged section tunnel;
(3) soil body and injecting cement paste in the described damaged section of the cleaning tunnel;
(4) detect described damaged section tunnel structure damaged degree, carry out the specific aim reparation.
2. soft soil layer as claimed in claim 1 tunnel freezing underground excavation in-situ method for repairing and constructing is characterized in that: when the soil body is with injecting cement paste in the damaged section of cleaning tunnel, set up bracing frame in described damaged section tunnel.
3. soft soil layer as claimed in claim 1 tunnel freezing underground excavation in-situ method for repairing and constructing is characterized in that: adopt salt solution or liquid nitrogen freezing method that consolidation by freezing is carried out on the stratum.
4. soft soil layer as claimed in claim 1 tunnel freezing underground excavation in-situ method for repairing and constructing is characterized in that: described injecting cement paste is a cement mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010172338A CN101864962A (en) | 2010-05-12 | 2010-05-12 | Soft soil layer channel freezing underground excavation in-situ remediation construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010172338A CN101864962A (en) | 2010-05-12 | 2010-05-12 | Soft soil layer channel freezing underground excavation in-situ remediation construction method |
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| Publication Number | Publication Date |
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| CN101864962A true CN101864962A (en) | 2010-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010172338A Pending CN101864962A (en) | 2010-05-12 | 2010-05-12 | Soft soil layer channel freezing underground excavation in-situ remediation construction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392653A (en) * | 2011-10-21 | 2012-03-28 | 同济大学 | Bent pipe one-sided freezing method for shield docking of stratum and freezing pipe driving device |
| CN103775110A (en) * | 2014-01-22 | 2014-05-07 | 上海市城市建设设计研究总院 | Underground excavation construction method for multilayer underground space of soft soil area |
| CN106833571A (en) * | 2017-02-28 | 2017-06-13 | 中石化石油工程技术服务有限公司 | A kind of pressure-bearing freeze temporary blocking agent high and preparation method thereof |
| CN108756955A (en) * | 2018-06-14 | 2018-11-06 | 中交第二航务工程局有限公司 | Shield tunnel gravity type sealing plugging structure and method |
| CN109882187A (en) * | 2019-04-08 | 2019-06-14 | 中国矿业大学 | A kind of tunnel structure breakage freezing process method for repairing and constructing and dedicated elevation angle frigo |
| CN115162408A (en) * | 2022-06-14 | 2022-10-11 | 长江勘测规划设计研究有限责任公司 | Construction method for repairing collapsed tunnel |
-
2010
- 2010-05-12 CN CN201010172338A patent/CN101864962A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392653A (en) * | 2011-10-21 | 2012-03-28 | 同济大学 | Bent pipe one-sided freezing method for shield docking of stratum and freezing pipe driving device |
| CN103775110A (en) * | 2014-01-22 | 2014-05-07 | 上海市城市建设设计研究总院 | Underground excavation construction method for multilayer underground space of soft soil area |
| CN106833571A (en) * | 2017-02-28 | 2017-06-13 | 中石化石油工程技术服务有限公司 | A kind of pressure-bearing freeze temporary blocking agent high and preparation method thereof |
| CN108756955A (en) * | 2018-06-14 | 2018-11-06 | 中交第二航务工程局有限公司 | Shield tunnel gravity type sealing plugging structure and method |
| CN108756955B (en) * | 2018-06-14 | 2023-06-02 | 中交第二航务工程局有限公司 | Gravity type water-stopping blocking structure and method for shield tunnel |
| CN109882187A (en) * | 2019-04-08 | 2019-06-14 | 中国矿业大学 | A kind of tunnel structure breakage freezing process method for repairing and constructing and dedicated elevation angle frigo |
| CN115162408A (en) * | 2022-06-14 | 2022-10-11 | 长江勘测规划设计研究有限责任公司 | Construction method for repairing collapsed tunnel |
| CN115162408B (en) * | 2022-06-14 | 2024-02-02 | 长江勘测规划设计研究有限责任公司 | Construction method for repairing collapse tunnel |
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Application publication date: 20101020 |