CN111810235A - Separated tunnel drainage system and construction method thereof - Google Patents
Separated tunnel drainage system and construction method thereof Download PDFInfo
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- CN111810235A CN111810235A CN202010711099.1A CN202010711099A CN111810235A CN 111810235 A CN111810235 A CN 111810235A CN 202010711099 A CN202010711099 A CN 202010711099A CN 111810235 A CN111810235 A CN 111810235A
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- 238000010276 construction Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000002265 prevention Effects 0.000 abstract description 9
- 230000002262 irrigation Effects 0.000 abstract description 4
- 238000003973 irrigation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a separated tunnel drainage system and a construction method thereof, and the separated tunnel drainage system comprises a tunnel main hole, a primary support, wall back circumferential drainage pipes and a secondary lining, wherein the secondary lining, a waterproof layer and the primary support are sequentially arranged in the circumferential direction of the periphery of the tunnel main hole, a plurality of wall back circumferential drainage pipes are arranged at intervals in the circumferential direction of the periphery of the primary support, the separated tunnel drainage system also comprises a drainage hole and a water collecting well belt water pump, the drainage hole is arranged below the tunnel main hole, and the water collecting well is arranged at the opening of the drainage hole. The invention has the advantages that: the main holes are mainly used for prevention, the drainage holes are mainly used for drainage, and the prevention and drainage are separated and do not interfere with each other; all the underground water flows into the drainage hole through the annular drainage pipe and finally is collected in the water collecting well at the hole opening for residents, irrigation and water storage; the drainage hole can be used as a leading pilot hole to detect geological conditions.
Description
Technical Field
The invention relates to the field of tunnel engineering water-proof and drainage systems, in particular to a separated tunnel drainage system and a construction method thereof.
Background
The traditional highway tunnel water-proof and drainage mainly adopts the guideline of 'combination of prevention, interception, drainage and blockage, adaptation according to local conditions and comprehensive treatment' and the principle of 'mainly blocking and limited drainage'. However, due to the limitation of the construction process, the annular drainage pipe, the longitudinal drainage pipe, the transverse drainage pipe and the waterproof plate in the tunnel are crossed too much, the waterproof plate is not tightly wrapped or the quality of the waterproof plate is not in place in the wrapping process, and the ten-tunnel nine-leakage is caused. For water-rich areas, full-section deep hole pre-grouting and peripheral grouting after excavation are commonly adopted in design and construction to plug surrounding rock cracks, so that the aim of water prevention is fulfilled. But the grouting engineering is often invisible without bottom holes, which causes great difficulty for design work. Therefore, a separate tunnel drainage system and a construction method thereof need to be designed, and the defects that the water is prevented and drained from being separated and interfered with each other, the main tunnel cannot be fully closed, and underground water cannot be collected and utilized in the prior art are overcome.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, the prevention and the discharge are not separated and mutually interfered, the main tunnel cannot be fully sealed, and underground water cannot be collected and utilized.
The invention is realized by the following technical scheme:
the utility model provides a disconnect-type tunnel drainage system, includes tunnel owner hole, preliminary bracing, wall back of the body hoop drain pipe, secondary lining, the peripheral hoop in tunnel owner hole sets gradually secondary lining, waterproof layer and preliminary bracing, the peripheral hoop interval in preliminary bracing sets up a plurality of wall backs of the body hoop drain pipes, still includes drainage hole, sump pit area water pump, drainage hole sets up in tunnel owner hole below, the sump pit sets up the hole department at drainage hole.
Compared with the prior art, the invention changes the tunnel water-proof and drainage into the principle that the main hole is mainly protected, the drainage hole is mainly arranged, the protection and drainage are separated and do not interfere with each other, thus the main hole tunnel adopts the waterproof board to be completely wrapped in a whole ring, the longitudinal drainage pipe, the tunnel bottom transverse drainage pipe and the central drainage ditch are cancelled, the wall back ring is connected with the drainage hole by the drainage pipe, and the longitudinal slope of the drainage hole is consistent with that of the main hole. Therefore, the surrounding rock underground water is completely isolated from the main hole, all the underground water flows into the drainage hole through the annular drainage pipe and finally is collected in the water collecting well at the hole opening for residents, irrigation and water storage.
In conclusion, the separated tunnel drainage system and the construction method thereof are suitable for highway tunnels, and the main tunnel is truly fully closed by arranging the drainage hole which is arranged below the main tunnel of the tunnel and is relatively independent on the principle that the main tunnel is mainly used for prevention, the drainage hole is mainly used for drainage, the prevention and drainage are separated and do not interfere with each other, so that water is completely isolated outside the tunnel, and the current situation of 'ten tunnels and nine leaks' is changed; the hole is provided with a water collecting well for collecting and storing underground water for effective utilization.
Furthermore, the circumferential drain pipe on the wall back is a single-wall nonporous corrugated pipe with the diameter of 50 mm;
the method is as follows.
Furthermore, a plurality of wall backs are annularly arranged at intervals towards the drain pipe, and two adjacent walls are spaced by 5 m;
the wall back is arranged towards the drain pipe in order to better collect the surrounding rock crack water and the underground water.
Further, the drainage hole is arranged 5-10m below the main tunnel hole;
the drainage holes are arranged 5-10m below the main tunnel, and the two tunnels are changed into small clear distance due to too close distance, so that excavation and supporting between the two tunnels are influenced.
Further, the diameter of the drainage hole is 3 meters;
the diameter of the drainage hole is 3 meters, people can enter the drainage hole, and an operation space is reserved.
Furthermore, the longitudinal slope of the drainage hole is consistent with that of the main tunnel hole, and the vertical slope between the drainage hole and the main tunnel hole is consistent with that of the main tunnel hole
The radial distance is 5 m;
the longitudinal slopes are kept consistent, the vertical distance between the drainage hole and the main tunnel of the tunnel is 5m, the surrounding rock underground water is completely isolated from the main tunnel, all the underground water flows into the drainage hole through the annular drainage pipes, and finally the underground water is collected in the water collecting well at the hole opening for residents, irrigation and water storage.
Further, a water pump is arranged in the water collecting well;
the water pump is arranged in the water collecting well, so that underground water can be collected well and effectively utilized.
The construction method for realizing the separated tunnel drainage system comprises the following steps:
s1, firstly, excavating a drainage tunnel as an advanced pilot tunnel of the tunnel to find out the geological condition of the tunnel and provide a basis for dynamic design;
s2, lining and supporting the drainage tunnel;
s3, excavating a main tunnel, and timely constructing a primary support and a wall back circumferential drainage pipe;
s4, constructing a vertical drainage pipe;
and S5, constructing a main tunnel secondary lining.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention relates to a separated tunnel drainage system and a construction method thereof.A main hole is mainly used for prevention, a drainage hole is mainly used for drainage, and the prevention and drainage are separated and do not interfere with each other;
2. the invention relates to a separated tunnel drainage system and a construction method thereof
The holes are finally collected in the water collecting well at the hole opening for residents, irrigation and water storage;
3. according to the separated tunnel drainage system and the construction method thereof, the drainage hole can be used as a leading pilot hole to detect geological conditions.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.
In the drawings:
fig. 1 is a schematic view of a tunnel drainage system.
Fig. 2 is a schematic view of a sump well.
Reference numbers and corresponding part names in the drawings:
1-main tunnel hole, 2-preliminary bracing, 3-circumferential wall back drainage pipe, 4-secondary lining, 5-drainage hole, 6-water collecting well and 7-waterproof layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
the invention discloses a separated tunnel drainage system, which comprises a tunnel main hole 1, a primary support 2, wall back circumferential drainage pipes 3 and a secondary lining 4, wherein the secondary lining 4, a waterproof layer 7 and the primary support 2 are sequentially arranged in the circumferential direction of the periphery of the tunnel main hole 1, the wall back circumferential drainage pipes 3 are arranged in the circumferential direction of the periphery of the primary support 2 at intervals, the separated tunnel drainage system further comprises a drainage hole 5 and a water collecting well belt water pump 6, the drainage hole 5 is arranged below the tunnel main hole 1, and the water collecting well 6 is arranged at the opening of the drainage hole 5.
The working process is as follows: firstly, a drainage tunnel is excavated, the geological condition of the tunnel can be found as an advanced pilot tunnel of the tunnel, a basis is provided for dynamic design, lining support is carried out on the drainage tunnel, a main tunnel is excavated, primary support and wall back circumferential drainage pipes are constructed in time, vertical drainage pipes are constructed, and secondary lining of the main tunnel is constructed.
Example 2:
as shown in fig. 1 and fig. 2, this embodiment is based on embodiment 1, and the back wall circumferential drain pipe 3 is a single-wall non-porous corrugated pipe with a diameter of 50 mm; the plurality of wall backs are annularly arranged towards the drain pipe 3 at intervals, and every two adjacent walls are spaced by 5 m; the drainage hole 5 is arranged 5-10m below the main tunnel hole 1; the diameter of the drainage hole 5 is 3 meters; the longitudinal slope of the drainage hole 5 is consistent with that of the main tunnel hole 1, and the vertical distance between the drainage hole 5 and the main tunnel hole 1 is 5 m; and a water pump is arranged in the water collecting well 6.
Example 3:
as shown in fig. 1 and 2, the construction method for implementing the separated tunnel drainage system includes the following steps:
s1, firstly, excavating a drainage tunnel 5 as an advanced pilot tunnel of the tunnel to find out the geological condition of the tunnel and provide a basis for dynamic design;
s2, lining and supporting the drainage tunnel 5;
s3, excavating a main tunnel 1, taking the main tunnel at the buried depth of 25m, and constructing a primary support 2 and a wall back annular drainage pipe 3 in time;
s4, constructing a vertical water drainage pipe, wherein the vertical distance between the water drainage tunnel and the main tunnel 1 is 5m, and the radius of the water drainage tunnel is 3 m;
and S5, constructing the main tunnel secondary lining 4.
After construction, testing the main tunnel lining related maximum and the drainage tunnel lining related maximum, wherein the test data table 1 and the test data table 2 are as follows:
TABLE 1
| Main hole result peak | Numerical value | Position of |
| Axial force | 1192.02kN | Arch foot |
| Bending moment | 832.55kN·m | Arch foot |
| Shear force | 748.15kN | Arch foot |
| Vertical displacement | 11.10mm | Vault |
| Vertical stress | 960.57kPa | Arch foot |
TABLE 2
| Peak value of drainage hole result | Numerical value | Position of |
| Axial force | 1287.66kN | Arch foot |
| Bending moment | 101.36kN·m | Arch foot |
| Shear force | 85.88kN | Arch foot |
| Vertical displacement | 7.706mm | Arch bottom (uplift) |
| Vertical stress | 1186kPa | Arched waist |
The test data in tables 1 and 2 prove that the mutual influence of the two tunnels is small under the conditions of timely support and proper construction.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides a disconnect-type tunnel drainage system, includes tunnel owner hole (1), preliminary bracing (2), wall back hoop drain pipe (3), secondary lining (4), tunnel owner hole (1) peripheral hoop sets gradually secondary lining (4), waterproof layer (7) and preliminary bracing (2), preliminary bracing (2) peripheral hoop interval sets up a plurality of wall backs hoop drain pipe (3), its characterized in that still includes drainage hole (5), sump pit area water pump (6), drainage hole (5) set up in tunnel owner hole (1) below, sump pit (6) set up the entrance to a cave department in drainage hole (5).
2. A split tunnel drainage system according to claim 1, wherein the back wall circumferential drainage pipe (3) is a single wall imperforate corrugated pipe each 50mm in diameter.
3. The separated tunnel drainage system according to claim 2, wherein a plurality of wall backs are arranged at intervals in the circumferential direction towards the drainage pipes (3), and the interval between two adjacent wall backs towards the drainage pipes (3) is 5 m.
4. A split tunnel drainage system according to claim 1, wherein the drainage hole (5) is arranged 5-10m below the main tunnel hole (1).
5. A split tunnel drainage system according to claim 1, wherein the drainage hole (5) is 3 meters in diameter.
6. A split tunnel drainage system according to claim 1, wherein the longitudinal slope of the drainage hole (5) is identical to the longitudinal slope of the main tunnel hole (1), and the vertical distance between the drainage hole (5) and the main tunnel hole (1) is 5 m.
7. A split tunnel drainage system according to claim 1, wherein a water pump is provided in the sump (6).
8. A construction method of the divided tunnel drainage system according to any one of claims 1 to 7, comprising the steps of:
s1, firstly, excavating a drainage tunnel (5) as an advanced pilot tunnel of the tunnel to find out the geological condition of the tunnel and provide a basis for dynamic design;
s2, lining and supporting the drainage hole (5);
s3, excavating a main tunnel, and constructing a primary support and a wall back circumferential drainage pipe (3) in time;
s4, constructing a vertical drainage pipe;
and S5, constructing the secondary lining (4) of the main tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010711099.1A CN111810235A (en) | 2020-07-22 | 2020-07-22 | Separated tunnel drainage system and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010711099.1A CN111810235A (en) | 2020-07-22 | 2020-07-22 | Separated tunnel drainage system and construction method thereof |
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| CN111810235A true CN111810235A (en) | 2020-10-23 |
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| CN202010711099.1A Pending CN111810235A (en) | 2020-07-22 | 2020-07-22 | Separated tunnel drainage system and construction method thereof |
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2020
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Application publication date: 20201023 |
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