CN203347805U - Bearing seepage prevention structure of bottom of karst area pressure tunnel - Google Patents
Bearing seepage prevention structure of bottom of karst area pressure tunnel Download PDFInfo
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- CN203347805U CN203347805U CN 201320324147 CN201320324147U CN203347805U CN 203347805 U CN203347805 U CN 203347805U CN 201320324147 CN201320324147 CN 201320324147 CN 201320324147 U CN201320324147 U CN 201320324147U CN 203347805 U CN203347805 U CN 203347805U
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- concrete
- karst
- tunnel
- seepage prevention
- prevention structure
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Abstract
The utility model relates to a bearing seepage prevention structure of the bottom of a karst area pressure tunnel. The bearing seepage prevention structure of the bottom of the karst area pressure tunnel is simple and convenient to construct, solves the problem that the bearing seepage prevention force of the karst area tunnel is insufficient, and reduces the project input. According to the technical scheme, the bearing seepage prevention structure of the bottom of the karst area pressure tunnel is characterized in that concrete is backfilled into a karst cavity of the bottom of the pressure tunnel, rebar concrete hidden arches are arranged in the backfilled concrete, and arch legs of the hidden arches are fixed to a base rock of the karst cavity through concrete arch supports. The bearing seepage prevention structure is applied to the hydraulic and hydro-power engineering.
Description
Technical field
The utility model relates to a kind of karst area pressurized tunnel bottom carrying leakage preventing structure.Be applicable to Hydraulic and Hydro-Power Engineering.
Background technology
Karst area is built pressurized tunnel and often can be run into bottom and exist the karst cavity to cause the situation of tunnel floor carrying seepage capability deficiency; need to carry out special processing; especially when the tunnel floor cavity is larger; conventional way is to carry out large-scale cavity concrete backfill; recover bottom Wall Rock of Tunnel integrality, improve its carrying seepage capability.
But scrambling and the tunnel of due to karst, growing carry the difference that antiseepage requires, and often the stemming operation amount is great.In addition, because the deposited material that karst cavity pocket wall adheres to is poor with concrete binding power, also needing provides due bearing capacity by increasing fill concrete thickness, has further increased fill concrete engineering quantity and backfill construction difficulty.
Summary of the invention
The technical problems to be solved in the utility model is: for the problem of above-mentioned existence, provide a kind of karst area pressurized tunnel bottom simple in structure, easy construction to carry leakage preventing structure, to solve the hypodynamic problem of karst region tunnel carrying antiseepage, reduce the engineering input amount.
The technical scheme that the utility model adopts is: a kind of karst area pressurized tunnel bottom carrying leakage preventing structure, it is characterized in that: fill concrete in the karst cavity of pressurized tunnel bottom, be provided with the steel concrete concealed arch in the concrete of backfill, the concealed arch arch springing is fixed on karst cavity basement rock through concrete saddle.
In described steel concrete concealed arch and karst cavity, the concrete of backfill is with between the cavity crag, joint bar being set.
The beneficial effects of the utility model are: the utility model is by fill concrete in the pressurized tunnel bottom cavity of karst region and the steel concrete concealed arch is set, and effectively solves the problem of the bottom carrying seepage capability deficiency of pressurized tunnel.The large-scale fill concrete of comparing is constructed, and the utility model fill concrete thickness is little, simple in structure, stressed clear and definite, can effectively lower difficulty of construction and construction investment.
The accompanying drawing explanation
The exemplary configurations schematic diagram that Fig. 1 is embodiment.
The specific embodiment
As shown in Figure 1, the present embodiment is a kind of karst area pressurized tunnel bottom carrying leakage preventing structure, and to carrying out the deposit cleaning of certain limit in pressurized tunnel 5 bottom karst cavitys 1, the cleaning scope requires to determine according to the antiseepage of pressurized tunnel 5.Replaced backfill by fill concrete in the cleaning scope, steel concrete concealed arch 2 is set in fill concrete, to bear the load in top tunnel and tunnel, concealed arch and cavity floor basement rock contact site suitably dig and concreting abut 3, between the concrete of concrete saddle and the 1 interior backfill of karst cavity and cavity crag, joint bar 4 is set, to increase bonding and power transmission ability; The tunnel agent structure is implemented on fill concrete top.
Claims (2)
1. leakage preventing structure is carried in a karst area pressurized tunnel bottom, it is characterized in that: fill concrete in pressurized tunnel (5) bottom karst cavity (1), be provided with steel concrete concealed arch (2) in the concrete of backfill, the concealed arch arch springing is fixed on karst cavity (1) basement rock through concrete saddle (3).
2. leakage preventing structure is carried in karst area pressurized tunnel according to claim 1 bottom, and it is characterized in that: the concrete of described steel concrete concealed arch (2) and the interior backfill of karst cavity (1) is with joint bar (4) is set between the cavity crag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320324147 CN203347805U (en) | 2013-06-06 | 2013-06-06 | Bearing seepage prevention structure of bottom of karst area pressure tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320324147 CN203347805U (en) | 2013-06-06 | 2013-06-06 | Bearing seepage prevention structure of bottom of karst area pressure tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203347805U true CN203347805U (en) | 2013-12-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320324147 Expired - Fee Related CN203347805U (en) | 2013-06-06 | 2013-06-06 | Bearing seepage prevention structure of bottom of karst area pressure tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203347805U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108071401A (en) * | 2016-11-10 | 2018-05-25 | 上海宝冶集团有限公司 | The construction method of karst area subway tunnel |
-
2013
- 2013-06-06 CN CN 201320324147 patent/CN203347805U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108071401A (en) * | 2016-11-10 | 2018-05-25 | 上海宝冶集团有限公司 | The construction method of karst area subway tunnel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 |