CN1912257A - Method for adapting to large stratigraphic uniform sedimentation or dislocation of open trench tunnel - Google Patents
Method for adapting to large stratigraphic uniform sedimentation or dislocation of open trench tunnel Download PDFInfo
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- CN1912257A CN1912257A CN 200610029788 CN200610029788A CN1912257A CN 1912257 A CN1912257 A CN 1912257A CN 200610029788 CN200610029788 CN 200610029788 CN 200610029788 A CN200610029788 A CN 200610029788A CN 1912257 A CN1912257 A CN 1912257A
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Abstract
A method for adapting nonuniform subsidence or dislocation of mass-value stratum by open trench tunnel includes selecting, designing and expanding rectangular section; applying preestimated position of ground fissure caused by stratum nonuniform subsidence or dislocation as boundary line and applying cut and cover tunneling means at two ends to cast rectangular tunnel in sectional way.
Description
Technical field
The present invention relates to tunnel-like, relate to a kind of method that is used for the adaptable for large value stratum ununiform settling or changing of the relative positions in structure built by opencut method tunnel concretely.
Background technology
Ground fissure be face of land rock-soil layer under natural cause and human factor effect, produce cracking and form the phenomenon in certain-length and width crack on ground.Ground fissure is the result of multifactor stack, and in ground fissure vigor system, its origin cause of formation act as the master with natural geology, and human factor is auxilliary.The activity of ground fissure has three-dimensional deformation characteristics, shows as vertical sedimentation, horizontal stretch-draw and twisting.
Because the activity of ground fissure is a dynamic change procedure, the origin cause of formation, mechanism and type are all very complicated, and has tangible segmented activity feature according to moving towards difference, the face of land that has has obviously and appears, the tool that has is lain concealed property, to build, the destruction form of structure also has nothing in common with each other, so the method for preventing and treating of engineering also should be at the different active situation and the space exhibition step characteristic of ground fissure, segmentation is considered.
At ground fissure active situation and space exhibition step characteristic, need relevant specialities such as circuit, structure, track and waterproof to take all factors into consideration.At first structure design will adapt to its different deformation requirements, the displacement of its generation is controlled in the default position and structure, and this body structure of tunnel is not damaged.In this scope, stop simultaneously enough deformation spaces,, and handle joint waterproofing well so that adjust track circuit.
In the construction of tunnel of prior art, the ground fissure for a large amount of value stratum differential settlements or the changing of the relative positions cause for example in the above changing of the relative positions amount of 10mm, does not also have efficient ways at present.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of method that is used for the adaptable for large value stratum ununiform settling or changing of the relative positions in structure built by opencut method tunnel is provided, this method is when enlarging the shield tunnel section, increased the longitudinal flexible of structure, improved the compliance of structure the differential settlement and the changing of the relative positions.
The object of the invention realizes being finished by following technical scheme:
A kind of method that is used for the adaptable for large value stratum ununiform settling or changing of the relative positions in structure built by opencut method tunnel, this tunnel structure is built and is formed, and is rectangular cross section, it is characterized in that the step that described method adopts is: select design to enlarge rectangular cross section; Be the boundary with the ground fissure position of estimating of being caused by the stratum differential settlement or the changing of the relative positions afterwards, cut and cover tunneling is adopted at two ends, and the Rectangular Tunnel structure is built in segmentation.
Under the tunnel floor sand cushion is set, base plate is reserved injected hole, segmentation build finish after, can in time carry out slip casting according to monitored data and fill the sedimentation space.
Described at last will be with closely knit clay or grey earthen backfill, compaction in layers on tunnel structure top.
Select design to enlarge rectangular cross section and refer to the length and width size of the length and width size of described tunnel cross-section greater than structure built by opencut method tunnel standard section, if its difference is a Δ, described Δ value, satisfying under the safety factor of national Specification, corresponding with the discreet value of this structure location stratum differential settlement or changing of the relative positions maximum perpendicular displacement in design period.
When the Rectangular Tunnel structure was built in segmentation, the rectangular configuration that is arranged in seam side between structure was reserved with Grouting Pipe.
Advantage of the present invention is that simple in structure, reliable in quality can adapt to the stratum settlement and the changing of the relative positions of higher value, avoids the damage of reinforced concrete segment in the tunnel.
Summary of drawings
Accompanying drawing 1 is arranged schematic diagram for Rectangular Tunnel facade of the present invention;
Concrete technical scheme
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 shown in Figure 1, label 1-6 represents respectively: rectangular configuration 1, seam 2, rectangular configuration 3, reservation Grouting Pipe 4, sedimentation space slip casting filling place 5, ground fissure 6.
Embodiment:
The step that the present embodiment method adopts is:
Select design to enlarge rectangular cross section, the overall size of described section is greater than the overall size of structure built by opencut method tunnel standard section, if its difference is a Δ, described Δ value is when design, should be according to the discreet value of ground fissure maximum perpendicular displacement in design period in the scope of design, consider that certain safety factor determines the design load Δ.
Reserve the malformation space afterwards, design enlarges rectangular cross section, is the boundary with ground fissure 6 positions of estimating of being caused by the stratum differential settlement or the changing of the relative positions, and cut and cover tunneling is adopted at two ends, and rectangular configuration 1, rectangular configuration 3 are built in segmentation, are seam 2 therebetween.
Be reserved with Grouting Pipe in the rectangular configuration 1,3 of seam 2 both sides, be reserved with Grouting Pipe 4 in the base plate in tunnel, can in time carry out slip casting and fill 5 the sedimentation space.
The base plate in tunnel is arranged with sand cushion.
At last will be with closely knit clay or grey earthen backfill, compaction in layers in rectangular configuration 1, rectangular configuration 3 tops.
When rectangular configuration 1, rectangular configuration 3 were built in segmentation, the rectangular configuration that is arranged in seam side between structure was reserved with Grouting Pipe.
Vertical displacement amount in ground fissure position is bigger, the cross dimensions requirement of crack 6 places malformation contentedly of standard section design, therefore influence the structure built by opencut method tunnel that band scope domestic demand designs big section in ground fissure, take into full account the deflection that it causes because of the ground fissure development during metro operation.
Structure is being provided with slide plane by ground fissure 6 places, and this joint area allowed certain slide down momentum when the vertically changing of the relative positions took place up and down on the stratum.
Claims (5)
1, a kind of method that is used for the adaptable for large value stratum ununiform settling or changing of the relative positions in structure built by opencut method tunnel, this tunnel structure is built and is formed, and is rectangular cross section, it is characterized in that the step that described method adopts is: select design to enlarge rectangular cross section; Be the boundary with the ground fissure position of estimating of being caused by the stratum differential settlement or the changing of the relative positions afterwards, cut and cover tunneling is adopted at two ends, and the Rectangular Tunnel structure is built in segmentation.
2, a kind of method that is used for the adaptable for large value stratum ununiform settling or changing of the relative positions in structure built by opencut method tunnel according to claim 1, it is characterized in that under the tunnel floor sand cushion being set, base plate is reserved injected hole, segmentation build finish after, can in time carry out slip casting according to monitored data and fill the sedimentation space.
3, a kind of method that is used for the adaptable for large value stratum ununiform settling or changing of the relative positions in structure built by opencut method tunnel according to claim 1, it is characterized in that described at last will be with closely knit clay or grey earthen backfill, compaction in layers on tunnel structure top.
4, a kind of method that is used for the adaptable for large value stratum ununiform settling or changing of the relative positions in structure built by opencut method tunnel according to claim 1, it is characterized in that selecting to design the expansion rectangular cross section refers to the length and width size of the length and width size of described tunnel cross-section greater than structure built by opencut method tunnel standard section, if its difference is a Δ, described Δ value, satisfying under the safety factor of national Specification, corresponding with the discreet value of this structure location stratum differential settlement or changing of the relative positions maximum perpendicular displacement in design period.
5, a kind of method that is used for the adaptable for large value stratum ununiform settling or changing of the relative positions in structure built by opencut method tunnel according to claim 1 is characterized in that the rectangular configuration that is arranged in seam side between structure is reserved with Grouting Pipe when the Rectangular Tunnel structure is built in segmentation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610029788 CN1912257A (en) | 2006-08-07 | 2006-08-07 | Method for adapting to large stratigraphic uniform sedimentation or dislocation of open trench tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610029788 CN1912257A (en) | 2006-08-07 | 2006-08-07 | Method for adapting to large stratigraphic uniform sedimentation or dislocation of open trench tunnel |
Publications (1)
| Publication Number | Publication Date |
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| CN1912257A true CN1912257A (en) | 2007-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610029788 Pending CN1912257A (en) | 2006-08-07 | 2006-08-07 | Method for adapting to large stratigraphic uniform sedimentation or dislocation of open trench tunnel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678134A (en) * | 2012-05-18 | 2012-09-19 | 中铁十二局集团第二工程有限公司 | Collapse and sink intrusion limit construction method for treating wind accumulated sand loess tunnel through stride shed pipe |
| CN108842813A (en) * | 2018-06-05 | 2018-11-20 | 重庆建工第七建筑工程有限责任公司 | Open trench tunnel differential settlement control structure and construction technology |
-
2006
- 2006-08-07 CN CN 200610029788 patent/CN1912257A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678134A (en) * | 2012-05-18 | 2012-09-19 | 中铁十二局集团第二工程有限公司 | Collapse and sink intrusion limit construction method for treating wind accumulated sand loess tunnel through stride shed pipe |
| CN108842813A (en) * | 2018-06-05 | 2018-11-20 | 重庆建工第七建筑工程有限责任公司 | Open trench tunnel differential settlement control structure and construction technology |
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