CN219081651U - Tunnel groundwater flow-guiding structure suitable for karst area - Google Patents
Tunnel groundwater flow-guiding structure suitable for karst area Download PDFInfo
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- CN219081651U CN219081651U CN202320029383.XU CN202320029383U CN219081651U CN 219081651 U CN219081651 U CN 219081651U CN 202320029383 U CN202320029383 U CN 202320029383U CN 219081651 U CN219081651 U CN 219081651U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a tunnel underground water diversion structure suitable for karst areas, which comprises an upper section karst channel and a lower section karst channel, wherein a concrete plugging structure is arranged at the end, close to a tunnel, of the upper section karst channel, and a first water diversion pipe group is arranged in the concrete plugging structure, so that the upper section karst channel is communicated with a buried drainage tank arranged at the outer side of a tunnel primary support through the first water diversion pipe group; a reinforced concrete plugging structure is arranged at the end, close to the tunnel, of the lower section karst channel, and an oblique insertion drainage ditch communicated with the lower section karst channel below the reinforced concrete plugging structure is arranged at one side of the lower section karst channel; the water outlet end of the buried drainage channel is connected to the water inlet port of the oblique insertion drainage channel through a tunnel longitudinal water collecting pipe. The utility model has simple structure, small disturbance damage to stratum, high construction operability and controllable construction risk; the water-rich karst channels cut off by the tunnel can be reconnected to realize independent drainage, and the drainage pressure of the tunnel drainage system is reduced.
Description
Technical Field
The utility model relates to a tunnel underground water diversion structure suitable for karst areas, and belongs to the technical field of tunnel drainage facilities.
Background
Under the effect of karst water chemical corrosion, a large number of karst caverns, karst channels and other underground karst structures can develop in the karst stratum. The tunnel may cross with the underground karst channel in space when crossing the karst stratum, and at this time, in order to ensure the smoothness of the tunnel line, the original karst channel can only be plugged. It should be noted that if there is groundwater in the karst channel, the channel for discharging groundwater is also blocked while the karst channel is blocked, which inevitably results in groundwater to pool on the top of the tunnel lining. The conventional countermeasure is to drain groundwater into the tunnel through a drainage system, and drain water into a roadbed drainage system outside the tunnel opening through a drainage structure in the central drainage ditch and the like. However, a large amount of groundwater enters the tunnel, on one hand, the drainage pressure of the tunnel drainage system is greatly increased, and the problem of groundwater siltation and overflow in the tunnel can occur in stormy weather; on the other hand, the underground water in the karst channel is discharged to the outside of the mountain through the tunnel, so that the water environment state of the communicating area of the karst channel is necessarily changed, and further, certain adverse effects can be brought to the natural environment or the living of local residents.
It can be seen that the existing treatment measures for large-scale discharge of karst groundwater through a tunnel drainage system have certain disadvantages and have a large improvement space. By combining the analysis, the research on the underground water diversion structure of the tunnel suitable for karst areas has great practical significance.
Disclosure of Invention
In view of the above, the utility model aims to provide a tunnel underground water diversion structure suitable for karst areas, which can overcome the defects of the prior art.
The utility model aims at realizing the following technical scheme:
the underground tunnel water diversion structure suitable for the karst area comprises a water-rich karst channel which is intersected with a tunnel and is cut into an upper-section karst channel and a lower-section karst channel by the tunnel; a buried drainage tank is arranged outside the primary support of the tunnel; a concrete blocking structure is arranged at the end, close to the tunnel, of the upper section karst channel, a first water diversion pipe group communicated with the upper section karst channel is arranged in the concrete blocking structure, a reinforced concrete blocking structure is arranged at the end, close to the tunnel, of the lower section karst channel, and a second water diversion pipe group communicated with the lower section karst channel is arranged in the reinforced concrete blocking structure; the water inlet end of the buried drainage tank is connected with the first water diversion pipe group, and the water outlet end is connected with the second water diversion pipe group; the upper section karst channel is communicated with the lower section karst channel through a first water diversion pipe group, a buried drain tank and a second water diversion pipe group which are sequentially arranged.
The first water diversion pipe group comprises a plurality of drainage pipes which are preset in the concrete plugging structure.
The second water diversion pipe group comprises a water collecting pipe which is preset in the reinforced concrete plugging structure and is longitudinally arranged along the tunnel, two opposite sides of the water collecting pipe are respectively provided with a water inlet hole and a water draining hole, the water inlet holes are connected with the buried water draining groove, and the water draining holes are provided with a lower plug-in water draining pipe connected to the lower section karst channel.
The lower insertion type drain pipe is obliquely downwards arranged relative to the water collecting pipe, and the inclination angle of the lower insertion type drain pipe is 50-70 degrees.
The reinforced concrete plugging structure comprises a reinforced concrete cover plate arranged below the inverted arch of the tunnel, and concrete for plugging the karst channel of the lower section is filled between the inverted arch and the reinforced concrete cover plate.
The buried drainage tank comprises an arc-shaped tank arranged along the outline of the tunnel, concrete is wrapped outside the arc-shaped tank, and a plurality of I-steel is arranged in the concrete close to one side of the secondary lining.
Compared with the prior art, the tunnel underground water diversion structure suitable for the karst area comprises a water-rich karst channel, wherein the water-rich karst channel is intersected with a tunnel and is cut into an upper-section karst channel and a lower-section karst channel by the tunnel; a buried drainage tank is arranged outside the primary support of the tunnel; a concrete blocking structure is arranged at the end, close to the tunnel, of the upper section karst channel, a first water diversion pipe group communicated with the upper section karst channel is arranged in the concrete blocking structure, a reinforced concrete blocking structure is arranged at the end, close to the tunnel, of the lower section karst channel, and a second water diversion pipe group communicated with the lower section karst channel is arranged in the reinforced concrete blocking structure; the water inlet end of the buried drainage tank is connected with the first water diversion pipe group, and the water outlet end is connected with the second water diversion pipe group; the first water diversion pipe group, the buried drain tank, the second water diversion pipe group and the lower section karst channel which are sequentially arranged are communicated with each other, so that the water-rich karst channel intercepted by the tunnel is reconnected, and the underground water in the upper section karst channel can be led into the lower section karst channel by bypassing the tunnel structure. By arranging the independent underground water drainage structure to reconnect the blocked karst channel, accumulated water in the water-rich karst channel cannot enter the tunnel drainage system, so that the drainage pressure of the tunnel drainage system is effectively relieved, the problem that underground water in a tunnel is blocked and overflows in stormy weather can be avoided, and adverse effects of tunnel construction on surrounding water environment are reduced to the greatest extent.
The beneficial effects of the utility model are as follows:
(1) The utility model has simple structure, high construction convenience and low cost, and the manual drainage channel is arranged at the outer side of the tunnel side wall to reconnect the channel which is cut off into karst channels, so that the underground water in the upper section karst channel can smoothly flow into the lower section karst channel, compared with the conventional drainage measure of introducing the underground water into the tunnel, the whole diversion process of the underground water does not enter the tunnel, the drainage pressure of the tunnel drainage structure is not increased, the operation risk of the underground water flowing in the tunnel is avoided, and the adverse effect of tunnel construction on the surrounding water environment can be reduced;
(2) The utility model is arranged at the periphery of the tunnel structure, the excavation amount of surrounding rock at the periphery of the tunnel is small in the construction process, the disturbance damage to stratum is small, the construction operability is high, and the construction risk is controllable.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic cross-sectional view of a buried drain tank.
Detailed Description
Hereinafter, preferred embodiments of the present utility model will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
1-2, a tunnel underground water diversion structure suitable for a karst area comprises a water-rich karst channel 1, wherein the water-rich karst channel 1 is intersected with a tunnel and is cut into an upper-section karst channel 1-1 and a lower-section karst channel 1-2 by the tunnel; a buried drain tank 4 is arranged outside the primary support of the tunnel; a concrete blocking structure 2 is arranged at the end, close to the tunnel, of the upper section karst channel 1-1, a first water diversion pipe group communicated with the upper section karst channel 1-1 is arranged in the concrete blocking structure, a reinforced concrete blocking structure 3 is arranged at the end, close to the tunnel, of the lower section karst channel 1-2, and a second water diversion pipe group communicated with the lower section karst channel 1-2 is arranged in the concrete blocking structure; the water inlet end of the buried drainage tank 4 is connected with the first water diversion pipe group, and the water outlet end is connected with the second water diversion pipe group; the first water diversion pipe group, the buried drain tank 4 and the second water diversion pipe group which are sequentially arranged are communicated with the lower section karst channel 1-2, so that the water-rich karst channel 1 cut off by a tunnel is reconnected, and the underground water in the upper section karst channel 1-1 can bypass the tunnel structure and is drained from the lower section karst channel 1-2.
The first water diversion pipe group comprises a plurality of drainage pipes 5 which are preset in the concrete plugging structure 2.
The second water diversion pipe group comprises a water collecting pipe 6 which is preset in the reinforced concrete plugging structure 3 and is longitudinally arranged along a tunnel, two opposite sides of the water collecting pipe 6 are respectively provided with a water inlet hole and a water outlet hole, the water inlet holes are connected with the buried water outlet groove 4, and the water outlet holes are provided with a lower plug-in type water outlet pipe 7 connected to the lower section karst channel 1-2.
The lower insertion type drain pipe 7 is arranged obliquely downwards relative to the water collecting pipe 6, and the inclination angle is 50-70 degrees.
The reinforced concrete blocking structure 3 comprises a reinforced concrete cover plate arranged below the inverted arch of the tunnel, and concrete is filled between the inverted arch and the reinforced concrete cover plate. The karst channel 1-2 at the lower section is covered by a steel frame concrete cover plate at first, and then concrete is poured for further blocking.
The buried drainage tank 4 comprises an arc drainage tank arranged along the outline of the tunnel, concrete is wrapped outside the arc drainage tank, and a plurality of I-steel is arranged in the concrete close to one side of the secondary lining.
The concrete construction method comprises the following steps:
s0, when a tunnel is excavated to the vicinity of the intersection position of the tunnel and the water-rich karst channel 1, anti-burst work of fillers such as water, sediment and the like in the water-rich karst channel 1 is needed, a concrete plugging structure 2 and a drainage pipe 5 of the karst channel can be constructed in advance by adopting related measures, the drainage pipe 5 is connected with a drainage pipeline for construction in the tunnel, underground water in the karst channel is temporarily discharged into a tunnel drainage system, and then construction of subsequent steps is carried out;
s1, synchronously constructing a buried drainage tank 4 in the tunnel construction process, wherein the construction method comprises the following specific steps: and (3) expanding and digging a groove on the outer side of the tunnel primary support structure, and backfilling and expanding the groove to the outer surface of the tunnel primary support by adopting sprayed concrete after the buried drainage groove 4 is placed in the groove. Wherein, the upper part of the buried drainage tank 4 is connected with the drainage pipe 5 without performing the construction of backfilling by spraying concrete;
s2, when the tunnel is excavated to the inverted arch position, the lower section karst channel 1-2 is excavated and exposed, then the top end of the lower section karst channel is closed by using a reinforced concrete cover plate, and a lower plug-in drain pipe 7 is inserted into the cover plate in advance;
s3, arranging a longitudinal water collecting pipe 6 as a connecting pivot of the buried drain tank 4 and the downward-inserted drain pipe 7, and filling concrete to seal an excavation groove below the inverted arch after the buried drain tank 4 and the downward-inserted drain pipe 7 are connected;
s4, disconnecting the drainage pipe 5 from a drainage pipeline for construction in the tunnel, connecting the drainage pipe 5 with the buried drainage tank 4, and then performing injection backfilling construction on the joint position of the upper part of the buried drainage tank 4 and the drainage pipe 5 to thoroughly seal the buried drainage tank 4;
s5, additionally erecting I-steel on one side, close to the secondary lining, of the buried drainage tank 4, and backfilling and expanding the groove to the inner surface of the primary support of the tunnel by adopting sprayed concrete to thoroughly finish the primary support construction of the inner side of the buried drainage tank 4; and then constructing tunnel structures such as a tunnel inverted arch, inverted arch filling, a tunnel water-proof and drainage system, a secondary lining and the like according to a normal construction process, and then completing all the construction of the tunnel structure at the section position.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variations and modification made to the above embodiment according to the technical matter of the present utility model without departing from the technical scope of the present utility model still fall within the scope of the technical scheme of the present utility model.
Claims (6)
1. The underground tunnel water diversion structure suitable for the karst area comprises a water-rich karst channel (1), wherein the water-rich karst channel (1) is intersected with a tunnel and is cut into an upper-section karst channel (1-1) and a lower-section karst channel (1-2) by the tunnel; the method is characterized in that: a buried drain tank (4) is arranged outside the primary support of the tunnel; a concrete blocking structure (2) is arranged at the end, close to the tunnel, of the upper section karst channel (1-1), a first water diversion pipe group communicated with the upper section karst channel (1-1) is arranged in the concrete blocking structure, a reinforced concrete blocking structure (3) is arranged at the end, close to the tunnel, of the lower section karst channel (1-2), and a second water diversion pipe group communicated with the lower section karst channel (1-2) is arranged in the concrete blocking structure; the water inlet end of the buried drainage tank (4) is connected with the first water diversion pipe group, and the water outlet end is connected with the second water diversion pipe group; the upper section karst channel (1-1) is communicated with the lower section karst channel (1-2) through a first water diversion pipe group, a buried drain tank (4) and a second water diversion pipe group which are sequentially arranged.
2. The tunnel groundwater diversion structure suitable for karst areas according to claim 1, wherein: the first water diversion pipe group comprises a plurality of drainage pipes (5) which are preset in the concrete plugging structure (2).
3. The tunnel groundwater diversion structure suitable for karst areas according to claim 1, wherein: the second water diversion pipe group comprises a water collecting pipe (6) which is preset in the reinforced concrete plugging structure (3) and is longitudinally arranged along a tunnel, two opposite sides of the water collecting pipe (6) are respectively provided with a water inlet hole and a water outlet hole, the water inlet holes are connected with the buried water outlet groove (4), and the water outlet holes are provided with a lower plug-in type water outlet pipe (7) connected to the lower section karst channel (1-2).
4. A tunnel groundwater diversion structure suitable for karst regions according to claim 3, wherein: the downward-inserted drain pipe (7) is obliquely downwards arranged relative to the water collecting pipe (6), and the inclination angle is 50-70 degrees.
5. A tunnel groundwater diversion structure suitable for karst regions according to claim 3, wherein: the reinforced concrete plugging structure (3) comprises a reinforced concrete cover plate arranged below the inverted arch of the tunnel, and concrete for plugging the karst channel (1-2) at the lower section is filled between the inverted arch and the reinforced concrete cover plate.
6. The tunnel groundwater diversion structure suitable for karst areas according to claim 1, wherein: the buried drainage tank (4) comprises an arc-shaped groove arranged along the outline of the tunnel, concrete is wrapped outside the arc-shaped groove, and a plurality of I-steel is arranged in the concrete close to one side of the secondary lining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320029383.XU CN219081651U (en) | 2023-01-06 | 2023-01-06 | Tunnel groundwater flow-guiding structure suitable for karst area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320029383.XU CN219081651U (en) | 2023-01-06 | 2023-01-06 | Tunnel groundwater flow-guiding structure suitable for karst area |
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| Publication Number | Publication Date |
|---|---|
| CN219081651U true CN219081651U (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320029383.XU Active CN219081651U (en) | 2023-01-06 | 2023-01-06 | Tunnel groundwater flow-guiding structure suitable for karst area |
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| CN (1) | CN219081651U (en) |
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2023
- 2023-01-06 CN CN202320029383.XU patent/CN219081651U/en active Active
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