CN212837844U - Deep shaft water inrush structure for blocking railway tunnel at underwater target point - Google Patents
Deep shaft water inrush structure for blocking railway tunnel at underwater target point Download PDFInfo
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- CN212837844U CN212837844U CN202021498144.1U CN202021498144U CN212837844U CN 212837844 U CN212837844 U CN 212837844U CN 202021498144 U CN202021498144 U CN 202021498144U CN 212837844 U CN212837844 U CN 212837844U
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- grouting
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- plugging
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 230000000903 blocking effect Effects 0.000 title claims description 24
- 239000011440 grout Substances 0.000 claims abstract description 29
- 230000002787 reinforcement Effects 0.000 claims abstract description 26
- 239000004568 cement Substances 0.000 claims abstract description 25
- 239000011435 rock Substances 0.000 claims abstract description 17
- 239000002893 slag Substances 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 238000010276 construction Methods 0.000 description 12
- 238000005553 drilling Methods 0.000 description 5
- 239000003673 groundwater Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Lining And Supports For Tunnels (AREA)
Abstract
The underwater target blocks the water inrush structure of the deep shaft of the railway tunnel so as to safely and quickly process the water inrush disaster of the deep shaft of the railway tunnel. The device comprises an underground water plugging structure and a targeted grouting reinforcement structure; the underground water plugging structure comprises a gravel grouting plugging layer, a cement paste water stop layer and a flat-bottom concrete grout stop pad which are sequentially arranged upwards from bottom well slag in an annular well wall lining, wherein the thickness of the gravel grouting plugging layer is greater than the height of the burst water breach. The lower part of the flat-bottom concrete grout stopping pad breaks through the lining of the well wall and is embedded into a rock body. The targeted grouting reinforcement structure comprises targeted grouting holes and targeted grouting reinforcement bodies, the targeted grouting holes are drilled by taking the top surface of a flat-bottom concrete grout stop pad as a platform and obliquely downwards penetrate through a well wall lining to enter soft rock bodies around a sudden water burst breach, and the targeted grouting reinforcement bodies are reinforcement bodies formed by pressing and injecting cement grout into the soft rock bodies through the targeted grouting holes and solidifying the cement grout.
Description
Technical Field
The utility model relates to a railway tunnel, in particular to deep shaft of target shutoff railway tunnel suddenly gushes water structure under water.
Background
In recent years, railway tunnel engineering in China is developed vigorously, particularly, a large number of extra-long tunnels and a plurality of deep large vertical shafts are developed in western mountainous areas, and with the planning and construction of Sichuan railways and other mountainous area railways, the extra-long tunnel auxiliary gallery is controlled by the landform and the landscape of the mountainous areas, and more deep vertical shafts are adopted.
For the vertical shaft engineering, the sudden gushing water flooded well is undoubtedly one of the biggest construction risks, and the previous vertical shaft engineering has too many sudden gushing water flooded well accidents, which causes great loss to the personnel safety and the engineering. At present, the treatment of shaft water inrush disasters at home and abroad is mainly divided into two categories, one category is forced drainage and drainage, and the other category is blocking before drainage, wherein the forced drainage and drainage is pumping and drainage equipment with the maximum water inflow amount larger than a water outlet point, and underground water in a shaft is pumped to a working surface through forced drainage and then is subjected to subsequent water blocking operation; the treatment of firstly plugging and then discharging is to plug the water outlet point of the underground water and then pump and discharge the underground water in the well, and the treatment is mainly divided into two treatment methods of underwater concrete bottom sealing and underwater slag throwing, grouting, bottom sealing and then discharging.
Aiming at the deep shaft of the railway tunnel, the treatment of the water inrush disaster is greatly different from the conventional shaft due to the high water pressure of underground water and the irregular development of rock mass cracks. The 'forced drainage and drainage' treatment method is limited by uncontrollable investment in groundwater inflow engineering, and the risk of directly performing water plugging operation in a high-pressure water environment after pumping drainage is extremely high. The drainage treatment method after the bottom sealing of the underwater concrete cannot ensure the continuity of the construction of the water-stopping material, so that a construction joint which is developed in all directions and is not compact in cementation is formed in the later stage of a water-stopping layer, the effect of the water-stopping layer is difficult to ensure, and the method brings non-negligible potential safety hazard to the construction of a subsequent working face. The method for treating the drainage after bottom sealing by underwater slag throwing grouting has high requirements on the materials, particle size and grading of slag, and the slurry is unevenly diffused in a slag pile under the action of high pressure water, so that a grouting blind area is easily formed.
In summary, the conventional shaft water inrush disaster treatment technology has many defects for the deep shaft of the railway tunnel, the high-pressure underground water plugging effect is difficult to guarantee, and the key of the treatment of water inrush breach plugging is not covered, so the water inrush disaster treatment technology for the deep shaft of the railway tunnel becomes an urgent need for building the deep shaft of the railway tunnel.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a deep shaft of target point shutoff railway tunnel suddenly gushes water structure under water is provided to realize the calamity of gushing water of the deep shaft of safe, quick processing railway tunnel suddenly.
The utility model provides a technical scheme that its technical problem adopted as follows:
the utility model discloses a deep shaft of target shutoff railway tunnel gushes water structure suddenly under water, characterized by: the device comprises an underground water plugging structure and a targeted grouting reinforcement structure; the underground water plugging structure comprises a gravel grouting plugging layer, a cement paste water stopping layer and a flat-bottom concrete grout stopping pad which are sequentially arranged in an annular well wall lining from bottom well slag body upwards, wherein the thickness of the gravel grouting plugging layer is larger than the height of a burst water breach; the lower part of the flat-bottom concrete grout stopping pad breaks through a lining of a well wall and is embedded into a rock body; the targeted grouting reinforcement structure comprises targeted grouting holes and targeted grouting reinforcement bodies, the targeted grouting holes are drilled by taking the top surface of a flat-bottom concrete grout stop pad as a platform and obliquely downwards penetrate through a well wall lining to enter soft rock bodies around a sudden water burst breach, the targeted grouting reinforcement bodies are reinforcement bodies formed by pressing and injecting cement grout into the soft rock bodies through the targeted grouting holes and solidifying the cement grout.
The utility model has the advantages that the combination of the grout water stop layer and the gravel grouting plugging layer is assisted by the water plugging reinforcement measure, the groundwater plugging effect is ensured, and the water plugging construction safety risk is relatively low; the working platform formed by the cement paste water stopping layer, the gravel grouting blocking layer and the flat-bottom concrete grout stopping pad is used for performing targeted grouting on the water inrush breach, so that high-pressure underground water at the water inrush breach can be effectively blocked, the weak rock mass at the breach is reinforced, secondary water inrush is avoided, and the construction safety of later-stage shaft digging and building is ensured; the method can realize safe and rapid treatment of the water inrush disaster of the deep shaft of the railway tunnel, and has very remarkable social and economic benefits and application value.
Drawings
The specification includes the following six figures:
FIG. 1 is a vertical view of the arrangement of grouting and slurry conveying pipelines in the deep shaft water inrush structure of the underwater target point blocking railway tunnel of the utility model;
FIG. 2 is a cross sectional view of grouting and slurry conveying pipeline arrangement in the deep shaft water inrush structure of the underwater target point blocking railway tunnel of the utility model;
FIG. 3 is a schematic view of the underwater target point plugging railway tunnel deep shaft water inrush structure of the present invention at the water inrush breach targeted grouting elevation;
FIG. 4 is a schematic plan view of the underwater target point plugging railway tunnel deep shaft water inrush structure of the present invention at the water inrush breach targeted grouting;
FIG. 5 is a schematic view of the grouting reinforcement elevation of the crushed stone blocking layer in the water inrush structure of the deep shaft of the underwater target blocking railway tunnel of the utility model;
FIG. 6 is a schematic plane view of grouting reinforcement of a gravel blocking layer in a deep shaft water inrush structure for blocking a railway tunnel at an underwater target point;
the figure shows the components, the part names and the corresponding marks: the construction method comprises the following steps of original rock A, a well wall lining 10, a gushing water break 11, a well slag body 13, a cement paste water stop layer 21, a gravel grouting blocking layer 22, a flat-bottom concrete water stop pad 23, a targeted grouting hole 24, a blocking layer grouting hole 25, a targeted grouting water stop layer 26a, a targeted grouting water stop layer 26b, a cement paste conveying pipeline 31 and a grouting pipeline 32.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The utility model discloses a deep shaft of target shutoff railway tunnel gushes water structure suddenly under water includes groundwater block structure and target slip casting reinforced structure. Referring to fig. 1 and 3, the underground water plugging structure comprises a gravel grouting plugging layer 22, a cement paste water stopping layer 21 and a flat-bottom concrete grout stopping pad 23 which are sequentially arranged in an annular well wall lining 10 from a bottom well slag body 13 upwards, wherein the thickness of the gravel grouting plugging layer 22 is larger than the height of the sudden water burst breach 11. The flat-bottom concrete grout stop pad 23 breaks through the lining 10 of the well wall and is embedded into the rock body. By combining the cement paste water stopping layer 21 and the gravel grouting plugging layer 22, the groundwater plugging effect can be ensured.
Referring to fig. 3 and 4, the targeted grouting reinforcement structure comprises targeted grouting holes 24 and targeted grouting reinforcement bodies, the targeted grouting holes 24 are drilled on the top surface of a flat-bottom concrete grout stop pad 23 serving as a platform and obliquely and downwards penetrate through a well wall lining 10 to enter weak rock bodies around a water inrush breach 11, and the targeted grouting reinforcement bodies are reinforcement bodies formed by injecting cement grout into the weak rock bodies through the targeted grouting holes 24 and solidifying the cement grout. The work platform that forms is only starched to grout stop layer 21, rubble slip casting blocking layer 22 and flat bottom type concrete and is only starched and fill up 23 is carried out the target slip casting to gushing water breach 11, can effectively block gushing water breach department high pressure groundwater to consolidate the weak rock mass of breach department, avoid taking place the secondary gushing water, ensure the construction safety that the later stage shaft was dug and is built.
Referring to fig. 3 and 4, the targeted grouting holes 24 are radially arranged at intervals, are drilled according to the outer ring hole and the inner ring hole step by step, and are sequentially pressed and injected with cement slurry to form a targeted grouting water-resisting layer 26a and a targeted grouting water-plugging layer 26b within the range of the targeted grouting reinforcement body. The elevation of the targeted grouting hole 24 is flush with the bottom surface of the slag body 13 in the bottom well.
Referring to fig. 3, the flat bottom type concrete grout stop pad 23 is used to prevent grout from rising and to secure grouting pressure, and has a preferably trapezoidal cross section, the lower portion of which breaks through the sidewall lining 10 and is embedded in the rock body.
Referring to fig. 5 and 6, blocking layer grouting holes 25 are arranged on the top surface of the flat bottom type concrete grout stop pad 23 at intervals in the circumferential direction, each blocking layer grouting hole 25 vertically extends downwards to the bottom surface of the bottom well slag body 13, and slurry is injected into the bottom well slag body 13 and the broken stone grouting blocking layer 22 through each blocking layer grouting hole 25 to enable the blocking layer grouting holes and the broken stone grouting blocking layer to be combined into a whole.
Referring to fig. 1 to 6, the utility model discloses a deep shaft of target shutoff railway tunnel gushes water structure under water is under construction according to following step:
firstly, a grouting pipeline 32 is put down to the position above a slag body 13 in the well, and crushed stones with certain thickness are thrown down to form a crushed stone cushion layer;
placing a cement paste conveying pipeline 31 to the upper part of the gravel cushion layer, and pouring cement paste to form a cement paste water stop layer 21;
thirdly, after the cement paste water stopping layer 21 is maintained, grouting by using a grouting pipeline 32 to seal the gravel cushion layer to form a gravel grouting plugging layer 22, wherein the thickness of the gravel grouting plugging layer 22 is larger than the height of the sudden water burst breach 11;
pumping and draining the shaft to drain accumulated water in the well wall lining 10;
chiseling the constructed well wall lining 10 on the top surface of the cement paste water stopping layer 21, and pouring concrete to construct a flat bottom type concrete water stopping pad 23;
sixthly, applying a target grouting hole (21) to the sudden water burst breach 11 on the top surface of the flat-bottom type concrete grout stopping pad 23, and performing target grouting treatment on the sudden water burst breach 11 through the target grouting hole 21 to form a target grouting reinforcement body;
seventhly, drilling a plugging layer grouting hole 25 in the gravel grouting plugging layer 22 on the top surface of the flat-bottom type concrete grout stop pad 23, and grouting and reinforcing the gravel grouting plugging layer 22 and the slag body 14 in the well;
and after the water burst of the water burst breach 11 is completely blocked, recovering the normal construction of the vertical shaft.
In the step (sixthly), the outer ring targeted grouting hole 21 is firstly formed, the pressure-grouting cement slurry forms a targeted grouting water-resisting layer 26a within the range of the targeted grouting reinforcement body, then the inner ring targeted grouting hole 21 is formed, and the pressure-grouting cement slurry forms a targeted grouting water-stopping layer 26 b.
In the step (c) and the step (c), the construction of the targeted grouting hole 21 and the plugging layer grouting hole 25 adopts a method of combining drilling and grouting, the whole section height adopts downward press-in type sectional grouting, and in the drilling process, if the water inflow amount in the hole is large, the drilling is suspended, the grouting and water sealing are performed firstly, then the hole is cleaned, the drilling and the grouting are performed until the hole is finished.
The above is only used for illustrating the present invention, and the present invention is not limited to the specific structure and the application range shown and described, so all the corresponding modifications and equivalents that may be utilized all belong to the patent scope applied by the present invention.
Claims (5)
1. Deep shaft of target shutoff railway tunnel suddenly gushes water structure under water, characterized by: the device comprises an underground water plugging structure and a targeted grouting reinforcement structure; the underground water plugging structure comprises a gravel grouting plugging layer (22), a cement paste water stopping layer (21) and a flat-bottom concrete slurry stopping pad (23) which are sequentially arranged upwards from a bottom well slag body (13) in an annular well wall lining (10), wherein the thickness of the gravel grouting plugging layer (22) is larger than the height of a sudden water burst break opening (11); the lower part of the flat-bottom concrete grout stopping pad (23) breaks through a well wall lining (10) and is embedded into a rock body; the targeted grouting reinforcement structure comprises targeted grouting holes (24) and targeted grouting reinforcement bodies, wherein the targeted grouting holes (24) are drilled by taking the top surface of a flat-bottom concrete grout stop pad (23) as a platform, obliquely and downwards penetrate through a well wall lining (10) to enter soft rock bodies around a water inrush breach (11), and the targeted grouting reinforcement bodies are reinforcement bodies formed after cement grout is solidified by injecting cement grout to the soft rock bodies through the targeted grouting holes (24).
2. The underwater target point blocking railway tunnel deep shaft water inrush structure of claim 1, which is characterized in that: the targeted grouting holes (24) are radially arranged at intervals, are drilled according to the outer ring hole and the inner ring hole step by step, cement slurry is injected according to sequence pressure, and a targeted grouting water-resisting layer (26a) and a targeted grouting water-stopping layer (26b) are formed within the range of the targeted grouting reinforcement body.
3. The underwater target point blocking railway tunnel deep shaft water inrush structure of claim 2, which is characterized in that: the elevation of the targeted grouting hole (24) is flush with the bottom surface of the slag body (13) in the bottom well.
4. The underwater target point blocking railway tunnel deep shaft water inrush structure of claim 1, which is characterized in that: the cross section of the flat-bottom type concrete grout stopping pad (23) is trapezoidal.
5. The underwater target point blocking railway tunnel deep shaft water inrush structure of claim 1, which is characterized in that: the flat bottom type concrete grout stopping pad (23) is provided with plugging layer grouting holes (25) on the top surface at intervals, each plugging layer grouting hole (25) vertically extends downwards to the bottom surface of a bottom well slag body (13), and water injection slurry is pressed into the bottom well slag body (13) and the gravel grouting plugging layer (22) through each plugging layer grouting hole (25) to enable the plugging layer grouting pad and the gravel plugging layer to be combined into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021498144.1U CN212837844U (en) | 2020-07-26 | 2020-07-26 | Deep shaft water inrush structure for blocking railway tunnel at underwater target point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021498144.1U CN212837844U (en) | 2020-07-26 | 2020-07-26 | Deep shaft water inrush structure for blocking railway tunnel at underwater target point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212837844U true CN212837844U (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021498144.1U Withdrawn - After Issue CN212837844U (en) | 2020-07-26 | 2020-07-26 | Deep shaft water inrush structure for blocking railway tunnel at underwater target point |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911193A (en) * | 2020-07-26 | 2020-11-10 | 中铁二院工程集团有限责任公司 | Underwater target point blocking railway tunnel deep shaft water inrush structure and construction method |
-
2020
- 2020-07-26 CN CN202021498144.1U patent/CN212837844U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911193A (en) * | 2020-07-26 | 2020-11-10 | 中铁二院工程集团有限责任公司 | Underwater target point blocking railway tunnel deep shaft water inrush structure and construction method |
| CN111911193B (en) * | 2020-07-26 | 2024-08-27 | 中铁二院工程集团有限责任公司 | Underwater target spot plugging railway tunnel deep vertical shaft water inrush structure and construction method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210330 Effective date of abandoning: 20240827 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210330 Effective date of abandoning: 20240827 |
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| AV01 | Patent right actively abandoned |