CN207944964U - It tunnel can contracting formula steel shotcrete support structure - Google Patents
It tunnel can contracting formula steel shotcrete support structure Download PDFInfo
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- CN207944964U CN207944964U CN201820135882.6U CN201820135882U CN207944964U CN 207944964 U CN207944964 U CN 207944964U CN 201820135882 U CN201820135882 U CN 201820135882U CN 207944964 U CN207944964 U CN 207944964U
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- truss
- cylinder
- buffer mechanism
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- tunnel
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Abstract
The utility model discloses a kind of tunnels can contracting formula steel shotcrete support structure.By being constituted with the sub-truss of tunnel cross sectional Contour matching, truss is multistage composite structure, is connected by cylinder buffer mechanism between each section；Cylinder buffer mechanism includes at least two groups intercommunication oil cylinder, and piston is arranged per group oil cylinder both ends, and cylinder buffer mechanism is made of upper and lower piston, socket cover, receiver with oil cylinder is connected to；It is respectively welded a whole shear resisting board in the cylinder block upper and lower part of each cylinder buffer mechanism, the connection of piston and sub-truss is connected and fixed by constituting the steel bushing of the steel column insertion piston tip of sub-truss.The utility model is small to the change of former design of its support, can be unfolded to apply in a short time when Excessive Settlement occurs for tunnel, i.e. the reaction time is short, reduces duration loss；The utility model is by that can buffer, more scientific mode carries out just branch lining cutting, and the answer force profile line of design is protected not fail.
Description
Technical field
The utility model belongs to technical field of tunnel construction, especially belongs to a kind of constructing tunnel support technology field, especially
It is related to a kind of supporting metal component structure, is mainly used in the first lining project in tunnel, belongs to technical field of civil engineering.
Background technology
In tunnelling construction, it is often necessary to carry out supporting to initial stage molding tunnel.But usually due to Surrounding Rock Strength
It is low, it is crushed, the reasons such as foliation development, branch structure at the beginning of tunnel cannot directly bear burden pressure before forming nature arch, at this
The stress of branch structure does not meet plan boundary condition usually at the beginning of a stage, so causing after the completion of just propping up, structure outline line is born
Not stress and gross distortion, thoroughly destroy structural stress to resistance to profile, lead to just branch failure.
Therefore, it is necessary to design one kind disclosure satisfy that preliminary bracing requirement, and the supporting construction of originally branch structure is used as possible.
Invention content
The utility model according to prior art deficiency disclose a kind of tunnel can contracting formula steel shotcrete support structure.This practicality
It is novel to solve the problems, such as to be to provide a kind of being used for the extension type steel shotcrete support structure based on yield supporting theory.
The utility model is achieved through the following technical solutions：
Tunnel can contracting formula steel shotcrete support structure, by being constituted with the sub-truss of tunnel cross sectional Contour matching,
It is characterized in that：The sub-truss is multistage composite structure, is connected by cylinder buffer mechanism between each section；
The cylinder buffer mechanism includes at least two groups intercommunication oil cylinder, and piston, both ends piston are arranged per group oil cylinder both ends
It is connected and fixed respectively with adjacent supports truss, per group oil cylinder, middle part has mutually threads a pipe with adjacent oil cylinder hydraulic oil.
The cylinder buffer mechanism with 4 groups are at least arranged in the sub-truss of tunnel cross sectional Contour matching.
A kind of sub-truss of structure of the utility model is 4 column truss, and cylinder buffer mechanism has 4 groups to be respectively arranged at 4 columns
Between each section of truss.
The utility model another kind sub-truss is 3 column truss, and cylinder buffer mechanism has 3 groups to be respectively arranged at 3 column truss
Between each section.
Above-mentioned cylinder buffer mechanism is made of upper and lower piston, socket cover, receiver with oil cylinder is connected to.
It is respectively welded a whole shear resisting board in the cylinder block upper and lower part of each cylinder buffer mechanism, shear resisting board will
The cylinder block of each cylinder buffer mechanism connects into overall structure.
The steel bushing that piston tip is inserted into the connection of the piston and sub-truss by constituting the steel column of sub-truss connects
It is fixed.
The utility model has the beneficial effects that it is small to the change of former design of its support, it can be short when Excessive Settlement occurs for tunnel
Expansion application in time, i.e. the reaction time is short, reduces duration loss；The utility model by that can buffer, more scientific mode into
Row just branch lining cutting, protects the answer force profile line of design not fail.
Description of the drawings
Fig. 1 the utility model supporting construction schematic diagrames；
Fig. 2 the utility model supporting construction close-up schematic views；
Another place's close-up schematic view of Fig. 3 the utility model supporting construction；
Fig. 4 the utility model supporting construction junction partial schematic diagram；
Fig. 5 the utility model cylinder buffers mechanism sectional view；
Fig. 6 the utility model shear resisting board schematic diagrames；
Fig. 7 the utility model supporting construction Support Deformation state partial schematic diagrams；
Fig. 8 the utility model supporting construction Support Deformation status diagrams；
The existing supporting construction Support Deformation status diagrams of Fig. 9.
In figure, 1- socket covers, 2- pistons, 3- receivers, 4- connection oil cylinders, 5- shear resisting boards.
Specific implementation mode
Specific implementation mode, which is to the utility model, to be further illustrated to the utility model With reference to embodiment
The further explanation of principle, does not limit the utility model in any way, does not have with the same or like technology of the utility model
Range beyond the utility model protection.
In conjunction with attached drawing.
Tunnel can contracting formula steel shotcrete support structure propped up by being constituted with the sub-truss of tunnel cross sectional Contour matching
Support truss is multistage composite structure, is connected by cylinder buffer mechanism between each section；
Cylinder buffer mechanism includes at least two groups intercommunication oil cylinder, and piston 2 is arranged per group oil cylinder both ends, and both ends piston 2 divides
It is not connected and fixed with adjacent supports truss, per group oil cylinder, middle part has mutually threads a pipe with adjacent oil cylinder hydraulic oil.
This example cylinder buffer mechanism with 4 groups are arranged in the sub-truss of tunnel cross sectional Contour matching.
The utility model sub-truss can be 4 column truss, and cylinder buffer mechanism has 4 groups, and to be respectively arranged at 4 column truss each
Between section.
The utility model sub-truss may be 3 column truss, and cylinder buffer mechanism has 3 groups to be respectively arranged at 3 column truss
Between each section.
As shown, cylinder buffer mechanism, by upper and lower piston 2, socket cover 1, receiver 3 is constituted with oil cylinder 4 is connected to.
It is respectively arranged with a whole shear resisting board 5, shear resisting board 5 in the cylinder block upper and lower part of each cylinder buffer mechanism
The cylinder block of each cylinder buffer mechanism is connected into overall structure.
Piston 2 and the connection of sub-truss are solid by the steel bushing connection for constituting 2 top of steel column insertion piston of sub-truss
It is fixed.
As shown in figure 5, when combination installation, piston 2 is inserted in socket cover 1 first, this knot that then will have been combined
Structure is combined with receiver 3, then, is connect connection oil cylinder 4 to form interworking architecture with above structure, is injected hydraulic oil, piston row
Journey is adjusted according to settling amount, and shear resisting board 5 is inserted in from organization cylinder both ends and two-sided welding is fixed；Then raw steel purlin is removed
Steel truss principal post is inserted into fixed in the connection hollow sleeve of piston 2 by the backing plate on frame.
Conventional first Zhi Zuoye is finally executed, i.e., after completing the installation of first layer mesh sheet and spray shield, carries out steel truss installation,
Second layer mesh sheet is installed again and spray is protected in time.
In certain freeway tunnel excavates construction, succeed using this technology.
The tunnel, which is in, suppresses rock stratum band, and overlying rock is complete-high wind China schist, including grapholite and sericite piece
Rock, Surrounding Rock Strength is very low, finds that foliation is extremely abundant after excavation, and rock cohesion is small, and internal friction angle is big, accidental quartz vein and
Aplite intrusive body, while it is the completely decomposed graphite flake after mechanism elegance and talent that tunnel, which passes through 4 crushed zones, crushed zone substance,
Rock, the weathering of part protolith are mud.In addition, project present position undergoes two precipitation every year, and since protolith height is broken,
Cause rock body water absorption after precipitation, dead weight to increase, so just on the one hand branch structure will bear country rock dead weight in tunnel, also to be held in rainy season
It additionally bears a heavy burden caused by being absorbed water by country rock.
This Tunnel Design follows New Austrian Tunneling Method, but since Surrounding Rock Strength is low, is crushed, foliation development, before forming nature arch
Just branch structure directly bears burden pressure in tunnel, and the stress in this stage does not meet plan boundary condition, so causing
Just after the completion of branch, structure outline line cannot withstand stress and gross distortion, thoroughly destroy structural stress to resistance to profile, cause just
Branch fails.
In this case, according to this technology yield supporting principle, using this patent supporting hydraulic mechanism so that excavate
Afterwards, the pressure of country rock first stage release is not offset directly, and is carried out just Zhi Yingli again after country rock forms nature arch and offset,
The design outline of first branch contour line is ensure that, to play estimated first Zhi Nengli.
As shown in Figure 8, solid line is the steel construction operating mode just completed after all just branch work, and dotted line is tunnel subsidence
Steel construction operating mode afterwards, it is seen then that after tunnel subsidence generation, the profile size of steel construction is changed by oil cylinder pressure release,
I.e. due to being settled, overall size becomes smaller, but the outline form of steel construction does not change, i.e., structure type does not have
There is change, so steel construction is still within its due design profile state, will continue to play the designed capacity of first branch structure.
As shown in figure 9, if do not use the utility model supporting construction, steel construction tunnel subsidence generation after, due to by
Power is uneven, and by the serious profile for destroying steel construction, after losing design profile form, the enabling capabilities of steel construction will drop significantly
It is low, even result in entire just branch structural failure.
It can be seen that the utility model is to offset settling amount when sedimentation occurs by the stroke of piston, it can be by setting
It sets multiple multiple structural breaks and the utility model is installed further to implement the anticipated settlement of bigger, the utility model does not change original
Steel truss structure in first branch design, only adjusts connection type, is connected, be changed to more flexible by original backing plate
Steel column be inserted into piston end steel bushing be connected and fixed.
Claims (7)
1. tunnel can contracting formula steel shotcrete support structure, it is special by being constituted with the sub-truss of tunnel cross sectional Contour matching
Sign is：The sub-truss is multistage composite structure, is connected by cylinder buffer mechanism between each section；
The cylinder buffer mechanism includes at least two groups intercommunication oil cylinder, and piston, both ends piston difference are arranged per group oil cylinder both ends
It is connected and fixed with adjacent supports truss, per group oil cylinder, middle part has mutually threads a pipe with adjacent oil cylinder hydraulic oil.
2. tunnel according to claim 1 can contracting formula steel shotcrete support structure, it is characterised in that：The cylinder buffer mechanism
With 4 groups are at least arranged in the sub-truss of tunnel cross sectional Contour matching.
3. tunnel according to claim 2 can contracting formula steel shotcrete support structure, it is characterised in that：The sub-truss is 4
Column truss, cylinder buffer mechanism have 4 groups to be respectively arranged between each section of 4 column truss.
4. tunnel according to claim 2 can contracting formula steel shotcrete support structure, it is characterised in that：The sub-truss is 3
Column truss, cylinder buffer mechanism have 3 groups to be respectively arranged between each section of 3 column truss.
5. tunnel according to any one of claims 1 to 4 can contracting formula steel shotcrete support structure, it is characterised in that：The oil
Cylinder buffer gear is made of upper and lower piston, socket cover, receiver with oil cylinder is connected to.
6. tunnel according to claim 5 can contracting formula steel shotcrete support structure, it is characterised in that：In each cylinder buffer mechanism
Cylinder block upper and lower part be respectively welded shear resisting board, shear resisting board connects into the cylinder block of each cylinder buffer mechanism whole
Body structure.
7. tunnel according to claim 5 can contracting formula steel shotcrete support structure, it is characterised in that：The piston and support purlin
The steel bushing that piston tip is inserted into the connection of frame by constituting the steel column of sub-truss is connected and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820135882.6U CN207944964U (en) | 2018-01-26 | 2018-01-26 | It tunnel can contracting formula steel shotcrete support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820135882.6U CN207944964U (en) | 2018-01-26 | 2018-01-26 | It tunnel can contracting formula steel shotcrete support structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207944964U true CN207944964U (en) | 2018-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820135882.6U Active CN207944964U (en) | 2018-01-26 | 2018-01-26 | It tunnel can contracting formula steel shotcrete support structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194109A (en) * | 2018-01-26 | 2018-06-22 | 中国水利水电第七工程局有限公司 | It tunnel can contracting formula steel shotcrete support structure |
| CN113281490A (en) * | 2021-05-13 | 2021-08-20 | 中国科学院武汉岩土力学研究所 | Modular tunnel segmentation excavation analog system |
-
2018
- 2018-01-26 CN CN201820135882.6U patent/CN207944964U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194109A (en) * | 2018-01-26 | 2018-06-22 | 中国水利水电第七工程局有限公司 | It tunnel can contracting formula steel shotcrete support structure |
| CN113281490A (en) * | 2021-05-13 | 2021-08-20 | 中国科学院武汉岩土力学研究所 | Modular tunnel segmentation excavation analog system |
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