CN101255798B - Tunnel inner micro-destabilization slip-casting control method in complex environmental condition - Google Patents
Tunnel inner micro-destabilization slip-casting control method in complex environmental condition Download PDFInfo
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- CN101255798B CN101255798B CN 200810036230 CN200810036230A CN101255798B CN 101255798 B CN101255798 B CN 101255798B CN 200810036230 CN200810036230 CN 200810036230 CN 200810036230 A CN200810036230 A CN 200810036230A CN 101255798 B CN101255798 B CN 101255798B
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention relates to tunnel construction class which particularly relates to a tiny disturbance grouting control method in tunnel under a complex circumstance condition, which comprises position choice of grouting hole, style of grouting and choice of grouting chance, wherein, two rings are selected when choosing the grouting ring size, and coating grouting the reinforce point. The present invention injects a special serum around bottom layer by special tiny disturbance control technique in tunnel by a set of science hole matching method to act as not only reinforce function, but also least disturbance for soil in grouting process, controls the disturbance in grouting process and stratum displacement by tunnel construction at a little degree, protect efficiently adjacent underground and buildings sensitivity of ground settlement.
Description
Technical field
The present invention relates to the constructing tunnel class, be specifically related to tunnel inner micro-destabilization slip-casting control method under a kind of complicated environmental condition.
Background technology
Present normally used grouting method comprises compaction grouting, rotary jet grouting, wards off and split slip casting etc., though its worker's method is different, but all only grouting amount, grouting pressure in the grouting parameter are stipulated, do not pay attention to the control that becomes more meticulous to the slip casting process, this is for perhaps stratum or ambient conditions meet the demands preferably; And the selection to the position, hole in the existing slurry injection technique is carried out direct cloth hole to certain single object of protection position often, can not take into account peripheral complex environment, the cloth hole is comparatively simple, and generally only considers the final effect of slip casting, and do not consider the perturbed problem of slip casting process, so the result often runs counter to desire; Especially under the high situation of environmental protection requirement; in the time of particularly in distortion need be controlled at the small scope of millimeter level; flow rate of grouting, slip casting number of times, beat important parameter such as pipe-pulling speed and can produce significant relatively self disturbance, so its degree that becomes more meticulous is then most important to the realization of construction control target.Improper as construction process control, often causing with the reinforcing is that the purpose grouting method has caused the disturbance bigger to the stratum on the contrary, makes the control index to be achieved.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, tunnel inner micro-destabilization slip-casting control method under a kind of complicated environmental condition is provided, this method adopts the hole position matching method of science, adopt the moving control of perturbation technology to inject special slurries to peripheral bottom in the tunnel, the formation displacement that slip casting process disturbance and constructing tunnel are caused controls to minimum degree.
The object of the invention realizes being finished by following technical scheme:
Tunnel inner micro-destabilization slip-casting control method under a kind of complicated environmental condition, comprise that the injected hole position is selected and the selection on grouting mode and slip casting opportunity, it is characterized in that this method when selecting the slip casting ring, must select two rings, and formation is wrapped notes to the reinforcement point.
At least want 4～5 rings at interval between described two rings, and be no more than 10 rings.
Adjacent two nearest hole slip casting time intervals are not less than 5 hours.
Described grouting mode adopts symmetrical slip casting, i.e. top injected hole and bottom injected hole, left side injected hole and the right injected hole slip casting simultaneously respectively is to prevent the tunnel off normal.
Described slip casting choose opportunities is in the section of sinking has just begun or tunnel subsidence value when reaching control criterion.
Advantage of the present invention is; hole position matching method by a cover science; in the tunnel, inject special slurries to peripheral bottom with the moving control of specific perturbation technology; make the slip casting process when playing the grouting and reinforcing effect; again to the disturbance minimum of the soil body; the formation displacement that slip casting process disturbance and constructing tunnel are caused controls to minimum degree, the effectively contiguous underground and ground settlement sensitive kinds construction of structures of protection.
Description of drawings
Accompanying drawing 1 is reserved injected hole position schematic diagram for the present invention;
Accompanying drawing 2 is arranged the scope schematic diagram for position, the effective hole of slip casting of the present invention;
Accompanying drawing 3 is the present invention's distortion-time plot.
The specific embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
As Figure 1-3, label 1-16 represents the hole number in each hole.
Present embodiment reaches the reinforcement effect maximization of environment and minimizing of adverse effect by the strictness screening to the injected hole position.Because each injected hole of tunneltron loop, for the effect that adds generations such as solid, surrounding environment and tunnel axis is different (as shown in the figure), need according to its relative position relation, surrounding enviroment and geology characteristic, obtain position, best hole layout through optimizing to analyze.
Position, hole choice criteria is a fringe conditions with the protective standard of ground complex environment at first: house and pipeline sedimentation all need be controlled in the 10mm, and tunnel axis accumulative total off normal is controlled within the 50mm; But the relation of the specific position between the three causes the contradiction of controlling each other.In addition, lifting speed on the pipeline needs less than 0.2mm/h, and its purpose is, avoids being out of shape on the one hand too fastly causing the local inhomogeneous sex change of pipeline to strengthen causing the pipe joint cracking to be revealed, pipeline is fallen after rise between the slip casting down-time period to some extent, be beneficial to follow-up slip casting.
The position, hole is selected at present mainly based on the control house, but will take into account the control problem of pipeline and tunnel axis, with the hole of obtaining best of breed number.
Each position, hole slip casting effect relatively
Determine position, effective hole according to this table, will tie mutually between the hole number, and adopt blossom type to arrange
The length of tube of beating of present embodiment is 1.0m-2.5m, and the pipe range weak point of beating of same hole of adjacent ring number and same ring adjacent holes number is wanted arranged alternate, produces the phase mutual interference when avoiding slip casting.
Current slip casting ring palpus is selected two rings, and forms notes are wrapped in the reinforcement point, and wants 4～5 rings at interval between two rings at least, and is no more than 10 rings.Simultaneously adjacent two nearest hole slip casting time intervals will surpass 5 hours, prevent that both slip castings simultaneously from producing big disturbance.
For preventing tunnel body off normal, adopt symmetrical slip casting, i.e. top injected hole 14,15,16,1,2 and bottom injected hole 10,9,8,7,6, left side injected hole 11,12,13 and the right injected hole 3,4,5 slip castings simultaneously respectively can effectively prevent the tunnel off normal.
Will be according to the steady sequence selection slip casting opportunity of multiple spot sedimentation.To set up the rational sedimentation absolute value and the rate of settling lowest limit to whole slip casting process, take two control standards.
Have selectable opportunity between wherein contiguous twice slip casting: the section of 1. sinking just begins, when flex point occurring as Fig. 3 distortion-time graph; When 2. sedimentation value reaches control criterion.When building settlement speed is big, select 1. slip casting slip casting on opportunity, it is stable the house to be kept; When building settlement speed hour, answer careful selection slip casting opportunity, if select the 1. slip casting slip casting on opportunity might bring big disturbance, make this soil body that has tended towards stability produce a disturbance, the existing stable state of broken ring, institute should select for the 2. slip casting opportunity in this case.
Claims (1)
1. tunnel inner micro-destabilization slip-casting control method under the complicated environmental condition, comprise the selection of injected hole position, and the selection on grouting mode and slip casting opportunity, it is characterized in that this method is when selecting the slip casting ring, must select two rings, and form notes are wrapped in the reinforcement point, at least want 4 rings at interval between described two rings, and be no more than 10 rings, adjacent two nearest hole slip casting time intervals are not less than 5 hours, described grouting mode adopts symmetrical slip casting, be top injected hole and bottom injected hole, left side injected hole and the right injected hole be slip casting simultaneously respectively, preventing the tunnel off normal, described slip casting choose opportunities is in the section of sinking just begun, or the tunnel subsidence value is when reaching control criterion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810036230 CN101255798B (en) | 2008-04-18 | 2008-04-18 | Tunnel inner micro-destabilization slip-casting control method in complex environmental condition |
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| CN 200810036230 CN101255798B (en) | 2008-04-18 | 2008-04-18 | Tunnel inner micro-destabilization slip-casting control method in complex environmental condition |
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| CN101255798A CN101255798A (en) | 2008-09-03 |
| CN101255798B true CN101255798B (en) | 2011-05-25 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101018282B1 (en) * | 2009-03-27 | 2011-03-04 | 주식회사 엔티에스이앤씨 | Method for constructing fabric for undergound tunnel |
| CN102635368B (en) * | 2011-05-09 | 2014-12-03 | 上海申通地铁集团有限公司 | Dual-liquid micro-disturbance grouting strengthening method for soft-soil subway tunnel |
| CN102536260A (en) * | 2011-12-29 | 2012-07-04 | 姚宪平 | Composite cavity component |
| CN105221164B (en) * | 2015-09-22 | 2017-12-26 | 中国石油天然气集团公司 | A kind of sealing tool and assemble method for deep tunnel slip casting reparation |
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Owner name: SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING Free format text: FORMER NAME: SHANGHAI NO.2 MUNICIPAL ENGINEERING CO., LTD. |
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Address after: 200232 Xuhui District, Liuzhou Wu Road, Lane No. 13, No. 3, No. Patentee after: Shanghai urban construction Municipal Engineering (Group) Co., Ltd. Address before: 200232 Xuhui District, Liuzhou Wu Road, Lane No. 13, No. 3, No. Patentee before: Shanghai No.2 Municipal Engineering Co., Ltd. |