CN211950587U - Drainage structure suitable for reconstruction of tunnel bottom structure of karst tunnel - Google Patents
Drainage structure suitable for reconstruction of tunnel bottom structure of karst tunnel Download PDFInfo
- Publication number
- CN211950587U CN211950587U CN202020438837.5U CN202020438837U CN211950587U CN 211950587 U CN211950587 U CN 211950587U CN 202020438837 U CN202020438837 U CN 202020438837U CN 211950587 U CN211950587 U CN 211950587U
- Authority
- CN
- China
- Prior art keywords
- tunnel
- pipe
- deeply
- drainage
- center tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a drainage structure suitable for restructuring of karst tunnel bottom structure, including laying the hoop blind pipe in the tunnel bottom inverted arch preliminary bracing of reconsitution, bury the center tube deeply that is linked together with the hoop blind pipe to and bury the lower wash-out tunnel that the center tube is linked together deeply, bury the below that the center tube is located the tunnel bottom inverted arch preliminary bracing of reconsitution deeply, bury the vertical setting in center tube along tunnel deeply, wear the wash-out tunnel down and be located the below of burying the center tube deeply, wear the horizontal setting of wash-out tunnel along the tunnel down. The utility model moves down the deeply buried central tube, can collect water accumulated at the lower part of the inverted arch and the filling layer, and eliminate the effect of underground water on the bottom structure of the tunnel; the deep buried central pipe leads and discharges accumulated water downwards through the drainage tunnel, the problem that the deep buried central pipe cannot be in direct connection with the existing tunnel ditch after being arranged in the engineering is effectively solved, and underground water is smoothly led and discharged; the utility model discloses the reliability is high, and it is big to cross the water section, and drainage ability is strong, can effectively dredge groundwater at the bottom of the tunnel and pressure release in advance.
Description
Technical Field
The utility model relates to a tunnel engineering technical field, especially a drainage structure suitable for karst tunnel bottom structure is restructured.
Background
With the continuous development of railway construction in China, railway network planning is continuously improved, more and more tunnels are built in karst areas, and especially in southwest mountain areas, a plurality of large and large complex karst tunnels are being built or are put into operation. Due to the complexity and development irregularity of the karst, the tunnel in the karst area has diseases such as ballastless track bed deformation, inverted arch, filling and uplift, and in severe cases, corrective measures such as inverted arch disassembly and replacement are required to prevent the track bed from continuously deforming.
The drainage structure at the bottom of traditional tunnel arranges the hoop blind pipe at inverted arch scope hoop, and groundwater is introduced vertical blind pipe by the hoop blind pipe under the water pressure effect, and vertical blind pipe introduces both sides ditch, flows in central ditch through horizontal drain pipe and then draws the row outside the hole. If the inverted arch is disassembled and replaced by adopting the traditional tunnel bottom drainage structure, the water pressure at the bottom of the tunnel cannot be effectively reduced, and the inverted arch cannot be connected with the existing ditch in the same direction after moving down the central ditch. Meanwhile, the operation tunnel inverted arch is disassembled and replaced and the tunnel bottom construction is mainly carried out in the time of operating a skylight of the train, the construction time is short, the construction efficiency is low, and the requirement on the construction safety is high. Therefore, the drainage structure for improving the reconstructed tunnel bottom structure of the railway tunnel in the karst area and the construction method thereof are of great importance for solving the diseases caused by the accumulated water at the tunnel bottom.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: to the problem that prior art exists, provide a drainage structure suitable for karst tunnel substructure is restructured, through restructuring the drainage structure at the bottom of the tunnel, change tunnel substructure drainage system, can eliminate the problem that bury deeply the center tube can't be with existing ditch in the same direction as connecing, reduce groundwater to the effect of tunnel substructure simultaneously, effectively solve diseases such as karst area tunnel ballastless track bed deformation, inverted arch and packing uplift, ensure tunnel operation safety.
In order to realize the purpose, the utility model discloses a technical scheme be:
the utility model provides a drainage structure suitable for restructuring of karst tunnel bottom structure, including laying the hoop blind pipe in the tunnel bottom inverted arch preliminary bracing of reconsitution, with bury the center tube deeply that the hoop blind pipe is linked together, and with bury the lower water drain hole of wearing that the center tube is linked together deeply, bury deeply the center tube and be located the below of inverted arch preliminary bracing at the tunnel bottom of reconsitution, bury deeply the vertical setting of center tube edge tunnel, it is located to wear the water drain hole down bury the below of center tube deeply, wear the water drain hole down and follow the horizontal setting in tunnel.
After the inverted arch at the bottom of the tunnel is removed and replaced, the reconstructed drainage structure moves the deeply-buried central pipe downwards, so that accumulated water at the part below the inverted arch and the filling layer can be effectively collected, and the effect of underground water on the bottom structure of the tunnel is eliminated; the deeply buried central tube leads and discharges accumulated water downwards through the drainage tunnel, effectively solves the problem that the deeply buried central tube cannot be in direct connection with the existing tunnel ditch after being arranged in the engineering, and smoothly leads and discharges underground water. The utility model discloses drainage structure at the bottom of the tunnel of reconsitution, the reliability is high, and it is big to cross the water section, and drainage ability is strong, can effectively dredge groundwater and pressure release in advance at the bottom of the tunnel, avoids leading to destroying once more of inverted arch structure because of groundwater drains unsmooth or torrential rain season groundwater yield surge, ensures tunnel operation safety.
As the utility model discloses an optimal scheme, bury the center tube deeply and be equipped with the drainage slope, be convenient for bury ponding in the center tube deeply and wear the drain hole direction downwards and flow, just bury the center tube both ends deeply and adopt concrete end wall shutoff, its thickness is more than or equal to 0.5m, prevents the seepage.
As the utility model discloses an optimal scheme, it is equipped with the through-hole to wear the sluicehole top down, be equipped with the contact pipe in the through-hole, the contact pipe intercommunication bury deeply the center tube with wear the sluicehole down.
As the utility model discloses an optimal scheme, the steel pipe has still been laid to the pore wall of through-hole, as the construction passageway.
As the utility model discloses an optimal scheme, bury the center tube deeply including laying the no sand concrete layer of tunnel end inverted arch preliminary bracing below of reconsitution the graded gravel layer has been laid to the below on no sand concrete layer the concrete cushion has been laid to the below on graded gravel layer, and is in graded gravel layer with be equipped with the reinforced concrete pipe between the concrete cushion, be equipped with a plurality of outlet on the reinforced concrete pipe, the outlet with the hoop blind pipe is linked together.
As the utility model discloses a preferred scheme, all the outlet is in be plum blossom mold on the reinforced concrete pipe and arrange, aperture and interval can be according to groundwater development degree adjustment.
As the utility model discloses an optimal scheme, the level is joined in marriage the metalling and is adopted the cobble to fill, the highly be less than or equal to 2m of level is joined in marriage the metalling, the particle diameter of level is joined in marriage the metalling and is greater than or equal to 5cm, can prevent effectively that stone bits, silt from permeating the ditch and arousing the ditch siltation.
As the utility model discloses an optimal scheme, the top surface of concrete cushion is constructed into the slope to the inboard, the drainage of being convenient for.
The utility model also discloses a construction method of drainage structure suitable for karst tunnel bottom structure is restructured, including following step:
the method comprises the following steps: constructing the underpass water drainage tunnel, reserving a through hole at the top of the underpass water drainage tunnel, implanting a steel pipe in the through hole as a construction channel, and grouting and compacting a surrounding rock gap between the steel pipe and the through hole;
step two: after the steel pipe construction is finished, personnel and machinery enter the bottom of the tunnel through the steel pipe to excavate a deep buried central pipe and an inverted arch of the tunnel, and a drainage gradient is reserved in the deep buried central pipe;
step three: after the deep buried central pipe is excavated, arranging concrete end walls at two ends of the deep buried central pipe for plugging;
step four: constructing a concrete cushion layer in the excavated deep-buried central pipe, wherein the top surface of the concrete cushion layer is constructed into a slope towards the inner side;
step five: constructing a reinforced concrete pipe on the upper part of the concrete cushion layer, and reserving drain holes on the surface of the reinforced concrete pipe;
step six: backfilling graded broken stones at the upper part of the reinforced concrete pipe, wherein the backfilling height is less than or equal to 2m, and forming a graded broken stone layer; backfilling the upper part of the graded crushed stone layer to the reconstructed tunnel bottom inverted arch primary support by using sand-free concrete to form a sand-free concrete layer;
step seven: after the construction of the deeply buried central pipe is finished, constructing the reconstructed tunnel bottom inverted arch primary support, laying an annular blind pipe and a transverse drain pipe on the reconstructed tunnel bottom inverted arch primary support, and then constructing a reconstructed tunnel bottom inverted arch secondary lining;
step eight: and arranging a connecting pipe in the steel pipe to connect the reinforced concrete pipe and the underpass drainage tunnel, backfilling a gap between the steel pipe and the connecting pipe by using concrete, and building the underpass drainage tunnel between the steel pipe and the connecting pipe.
The utility model discloses a set up down and wear water tunnel and steel pipe, for the encampment tunnel invert tear open trade and the tunnel end drainage structure reconsitution provides the construction passageway, guarantee that the operation train does not receive the construction influence, can improve the efficiency of construction, guarantee construction safety.
As the preferred scheme of the utility model, in the second step, the waste slag that the excavation produced passes through the steel pipe is shed to the underrun in the water tunnel to transport outside the hole.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
(1) after the inverted arch at the bottom of the tunnel is removed and replaced, the reconstructed drainage structure moves the deeply-buried central pipe downwards, so that accumulated water at the part below the inverted arch and the filling layer can be effectively collected, and the effect of underground water on the bottom structure of the tunnel is eliminated; the deeply buried central tube leads and discharges accumulated water downwards through the drainage tunnel, effectively solves the problem that the deeply buried central tube cannot be in direct connection with the existing tunnel ditch after being arranged in the engineering, and smoothly leads and discharges underground water. The utility model discloses drainage structure at the bottom of the tunnel of reconsitution, the reliability is high, and it is big to cross the water section, and drainage ability is strong, can effectively dredge groundwater and pressure release in advance at the bottom of the tunnel, avoids leading to destroying once more of inverted arch structure because of groundwater drains unsmooth or torrential rain season groundwater yield surge, ensures tunnel operation safety.
(2) The utility model discloses a set up down and wear water tunnel and steel pipe, for the encampment tunnel invert tear open trade and the tunnel end drainage structure reconsitution provides the construction passageway, guarantee that the operation train does not receive the construction influence, can improve the efficiency of construction, guarantee construction safety.
Drawings
Fig. 1 is a cross sectional view of drainage structure suitable for reconstruction of karst tunnel bottom structure of the utility model.
Fig. 2 is a partially enlarged view of the deeply buried center tube of fig. 1.
Figure 3 is a longitudinal section view of drainage structure suitable for karst tunnel bottom structure is restructured.
Fig. 4 is a partially enlarged view of the lower through-drain cave in fig. 3.
Icon: 1-tunnel bottom inverted arch secondary lining, 2-tunnel bottom inverted arch filling layer, 3-central ditch, 4-side ditch, 5-transverse drain pipe, 6-reconstructed tunnel bottom inverted arch primary support, 7-annular blind pipe, 8-deep buried central pipe, 81-concrete cushion layer, 82-reinforced concrete pipe, 83-drainage hole, 84-graded gravel layer, 85-sand-free concrete layer, 86-concrete end wall, 9-lower through drainage hole, 10-through hole, 11-steel pipe, 12-connecting pipe and 13-built lining.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
As shown in fig. 1, the reconstructed tunnel bottom structure of the karst tunnel comprises a reconstructed tunnel bottom inverted arch secondary lining 1, a tunnel bottom inverted arch filling layer 2, a central ditch 3, side ditches 4, transverse drain pipes 5 and a reconstructed tunnel bottom inverted arch preliminary support 6.
As shown in fig. 1 and fig. 3, this embodiment provides a drainage structure suitable for reconstruction of karst tunnel bottom structure, including laying the hoop blind pipe 7 in the tunnel bottom inverted arch preliminary bracing 6 of reconstruction, with the deeply buried center tube 8 that the hoop blind pipe 7 is linked together, and with the lower water tunnel 9 that passes that deeply buried center tube 8 is linked together, deeply buried center tube 8 is located the below of the tunnel bottom inverted arch preliminary bracing 6 of reconstruction, deeply buried center tube 8 sets up along the vertical in tunnel, the lower water tunnel 9 is located the below of deeply buried center tube 8, the lower water tunnel 9 that passes along the horizontal in tunnel sets up.
As shown in fig. 2, the deep-buried central pipe 8 includes a sand-free concrete layer 85 laid below the reconstructed tunnel bottom inverted arch preliminary bracing 6, a graded gravel layer 84 is laid below the sand-free concrete layer 85, the graded gravel layer 84 is filled with pebbles, the grain size of the graded gravel layer 84 is not less than 5cm, the height of the graded gravel layer 84 is not less than 2m, a concrete cushion layer 81 is laid below the graded gravel layer 84, the top surface of the concrete cushion layer 81 is constructed to have a certain slope inward, a reinforced concrete pipe 82 is arranged between the graded gravel layer 84 and the concrete cushion layer 81, the inner diameter of the reinforced concrete pipe 82 is not less than 30cm, the distance between the bottom of the reinforced concrete pipe 82 and the concrete cushion layer 81 is not less than 1m, a plurality of weep holes 83 are arranged on the reinforced concrete pipe 82, all the weep holes 83 are arranged in a quincunx pattern, the drain hole 83 is communicated with the annular blind pipe 7. Deeply buried center tube 8 is equipped with certain drainage slope, and the intraductal ponding of being convenient for passes down the flow of outlet 9 direction, just deeply buried center tube 8 both ends adopt concrete end wall 86 to carry out the shutoff, and its thickness is not less than 0.5m, prevents the seepage.
As shown in fig. 4, a through hole 10 is arranged at the top of the underpass water drain hole 9, a steel pipe 11 is laid on the wall of the through hole 10, a connection pipe 12 is arranged in the through hole, the aperture of the connection pipe 12 is smaller than that of the steel pipe 11, and the connection pipe 12 is communicated with the deeply buried central pipe 8 and the underpass water drain hole 9. And a gap between the steel pipe 11 and the connection pipe 12 is densely backfilled by concrete, and a supplementary lining 13 of the lower through water drain tunnel 9 between the steel pipe 11 and the connection pipe 12 is built.
Example 2
The construction method of the drainage structure suitable for reconstructing the tunnel bottom structure of the karst tunnel, which is described in embodiment 1, comprises the following steps:
the method comprises the following steps: constructing the underpass water drainage tunnel 9, reserving a through hole 10 at the top of the underpass water drainage tunnel 9, implanting a steel pipe 11 in the through hole 10 as a construction channel, and grouting and compacting a surrounding rock gap between the steel pipe 11 and the through hole 10;
step two: after the steel pipe 11 is constructed, personnel and machinery enter the bottom of the tunnel through the steel pipe 11 to excavate a deep buried central pipe 8 and an inverted arch of the tunnel, and a drainage gradient is reserved in the deep buried central pipe 8; the waste slag generated by excavation is thrown into the underpass water tunnel 9 through the steel pipe 11 and is transported out of the tunnel;
step three: after the deep buried central pipe 8 is excavated, arranging concrete end walls 86 at two ends of the deep buried central pipe 8 for plugging;
step four: constructing a concrete cushion 81 in the excavated deep-buried central pipe 8, wherein the top surface of the concrete cushion 81 is constructed to be an inward slope;
step five: constructing a reinforced concrete pipe 82 on the upper part of the concrete cushion 81, and reserving a drain hole 83 on the surface of the reinforced concrete pipe 82;
step six: backfilling graded broken stones at the upper part of the reinforced concrete pipe 82, wherein the backfilling height is less than or equal to 2m, and forming a graded broken stone layer 84; backfilling the upper part of the graded crushed stone layer 84 with sand-free concrete to the reconstructed tunnel bottom inverted arch primary support 6 to form a sand-free concrete layer 85;
step seven: after the construction of the deep-buried central tube 8 is completed, constructing the reconstructed tunnel bottom inverted arch primary support 6, laying an annular blind tube 7 and a transverse drain pipe 5 on the reconstructed tunnel bottom inverted arch primary support 6, and then constructing a reconstructed tunnel bottom inverted arch secondary lining 1;
step eight: and a connecting pipe 12 is arranged in the steel pipe 11 to connect the reinforced concrete pipe 8 and the underpass drainage tunnel 9, a gap between the steel pipe 11 and the connecting pipe 12 is densely backfilled by concrete, and a lining 13 of the underpass drainage tunnel 9 between the steel pipe 11 and the connecting pipe 12 is additionally built.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a drainage structure suitable for restructuring of karst tunnel bottom structure which characterized in that, including laying the hoop blind pipe in the tunnel bottom inverted arch preliminary bracing of reconsitution, with bury the center tube deeply that the hoop blind pipe is linked together, and with bury the lower wash-out tunnel that the center tube is linked together deeply, bury deeply the center tube and be located the below of the tunnel bottom inverted arch preliminary bracing of reconsitution, bury deeply the vertical setting of center tube edge tunnel, it is located to wear the wash-out tunnel down bury the below of center tube deeply, it follows to wear the wash-out tunnel down the horizontal setting in tunnel.
2. The drainage structure suitable for the reconstruction of the tunnel bottom structure of the karst tunnel according to claim 1, wherein the deep-buried central pipe is provided with a drainage slope, and two ends of the deep-buried central pipe are plugged by concrete end walls.
3. The drainage structure suitable for the reconstruction of the tunnel bottom structure of the karst tunnel according to claim 1, wherein a through hole is formed in the top of the underpass water tunnel, and a connection pipe is arranged in the through hole and is communicated with the deeply buried central pipe and the underpass water tunnel.
4. The drainage structure suitable for the reconstruction of the karst tunnel bottom structure of claim 3, wherein the wall of the through hole is paved with a steel pipe.
5. The drainage structure suitable for the reconstruction of the tunnel bottom structure of the karst tunnel according to any one of claims 1 to 4, wherein the deeply buried central pipe comprises a sand-free concrete layer laid below the reconstructed tunnel bottom inverted arch preliminary support, a graded broken stone layer is laid below the sand-free concrete layer, a concrete cushion layer is laid below the graded broken stone layer, a reinforced concrete pipe is arranged between the graded broken stone layer and the concrete cushion layer, a plurality of drainage holes are arranged on the reinforced concrete pipe, and the drainage holes are communicated with the annular blind pipe.
6. The drainage structure suitable for the reconstruction of a karst tunnel bottom structure of claim 5, wherein all the drainage holes are arranged on the reinforced concrete pipe in a quincunx shape.
7. The drainage structure suitable for reconstructing a tunnel bottom structure of a karst tunnel according to claim 5, wherein the graded gravel layer is filled with pebbles, and the height of the graded gravel layer is less than or equal to 2 m.
8. The drainage construction suitable for the reconstruction of a karst tunnel bottom structure of claim 5, wherein the top surface of the concrete pad is constructed as a slope inwardly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020438837.5U CN211950587U (en) | 2020-03-30 | 2020-03-30 | Drainage structure suitable for reconstruction of tunnel bottom structure of karst tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020438837.5U CN211950587U (en) | 2020-03-30 | 2020-03-30 | Drainage structure suitable for reconstruction of tunnel bottom structure of karst tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211950587U true CN211950587U (en) | 2020-11-17 |
Family
ID=73168726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020438837.5U Active CN211950587U (en) | 2020-03-30 | 2020-03-30 | Drainage structure suitable for reconstruction of tunnel bottom structure of karst tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211950587U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271118A (en) * | 2020-03-30 | 2020-06-12 | 中铁二院工程集团有限责任公司 | Drainage structure suitable for reconstruction of tunnel bottom structure of karst tunnel and construction method thereof |
-
2020
- 2020-03-30 CN CN202020438837.5U patent/CN211950587U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271118A (en) * | 2020-03-30 | 2020-06-12 | 中铁二院工程集团有限责任公司 | Drainage structure suitable for reconstruction of tunnel bottom structure of karst tunnel and construction method thereof |
| CN111271118B (en) * | 2020-03-30 | 2024-06-04 | 中铁二院工程集团有限责任公司 | Drainage structure suitable for reconstruction of karst tunnel bottom structure and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111456773B (en) | Close-fitting type subway station structure combining light and shade excavation and construction method thereof | |
| CN105863671B (en) | Frame-type subdrain system tunnel lining structure | |
| CN103256052B (en) | Construction method for integral straight middle wall type double-arch tunnel | |
| CN103032097B (en) | Be applicable to tunnel drainage structure and the construction method thereof of bias voltage water rich strata | |
| CN107905811B (en) | Inverted arch-free lining of foundation hollow longitudinal beam bearing arch structure | |
| CN113847040B (en) | Large-span non-column underground station underground excavation construction method | |
| CN111021408A (en) | Construction method of water-stopping support system in pipe gallery river reach operation | |
| CN112681374A (en) | Shallow-buried underground-excavated channel cover excavation top-down construction method under complex conditions | |
| CN111271118B (en) | Drainage structure suitable for reconstruction of karst tunnel bottom structure and construction method thereof | |
| CN115450221A (en) | Construction method for subway crossing river channel | |
| CN105926391A (en) | Method for widening shoulder of existing railway subgrade | |
| CN211950587U (en) | Drainage structure suitable for reconstruction of tunnel bottom structure of karst tunnel | |
| CN215804714U (en) | Drainage depressurization system at bottom of rich water section tunnel | |
| CN108086993B (en) | Construction method of haunched floor type tunnel lining and drainage system structure with drainage gallery arranged at tunnel bottom | |
| CN110644297A (en) | Anti-bulging supporting structure of ballastless track high-speed railway and construction method | |
| CN108222975B (en) | Large arch base bottom plate type lining and drainage system structure thereof | |
| CN203050779U (en) | Tunnel drainage structure suitable for bias pressure rich water strata | |
| CN113818300A (en) | Sponge urban ecological roadbed structure based on original road and construction method thereof | |
| CN112343654A (en) | Maintainable drainage system for extremely water-rich stratum tunnel and tunnel | |
| CN208073498U (en) | The hollow longeron of foundation carries domes without the lining cutting of inverted arch type and its drainage system | |
| CN116398165A (en) | New tunnel penetrating through existing station at zero distance and construction method thereof | |
| CN110486062A (en) | A kind of method of mechanical tunneling multilayer multispan underground engineering in weak soil | |
| CN111794757B (en) | Underground water treatment method for composite stratum subsurface excavation construction under existing building | |
| CN215406089U (en) | Bury frame underground structure supporting construction based on pier protection demand | |
| CN212247676U (en) | Structure is rebuild to existing railway roadbed underground drainage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |