CN111412013A - Construction method of weak surrounding rock tunnel in water-rich area - Google Patents
Construction method of weak surrounding rock tunnel in water-rich area Download PDFInfo
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- CN111412013A CN111412013A CN202010223162.7A CN202010223162A CN111412013A CN 111412013 A CN111412013 A CN 111412013A CN 202010223162 A CN202010223162 A CN 202010223162A CN 111412013 A CN111412013 A CN 111412013A
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- tunnel
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- weak surrounding
- drain pipe
- surrounding rock
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- 238000010276 construction Methods 0.000 title claims abstract description 66
- 239000011435 rock Substances 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000004033 plastic Substances 0.000 claims abstract description 7
- 229920003023 plastic Polymers 0.000 claims abstract description 7
- 239000004576 sand Substances 0.000 claims description 10
- 239000004570 mortar (masonry) Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 10
- 238000009412 basement excavation Methods 0.000 description 7
- 238000005422 blasting Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000009918 complex formation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention belongs to the field of highway engineering, and relates to a construction method of a weak surrounding rock tunnel in a water-rich area, inner side ditches are arranged on two sides in the tunnel, a transverse drain pipe with the diameter of 100mm is arranged at the bottom of the inner side ditch, the transverse drain pipe is connected with side drain pipes, the diameter of each side drain pipe is 250mm, a plastic blind ditch is arranged between every two adjacent side drain pipes, joint wells are arranged at two ends of each side drain pipe, the end parts of the joint wells are connected with double-wall corrugated pipes, according to the geological and topographic conditions of the tunnel, a reasonable drainage system is arranged in the tunnel to fully exert the function of the construction technology, thereby keeping the stability of the weak surrounding rock, particularly, in the process of tunnel engineering construction, the control force on weak surrounding rocks needs to be increased, and the influence of the weak surrounding rocks on the quality of the tunnel is reduced by adopting a scientific construction technical means, so that the quality level of the tunnel engineering is obviously improved.
Description
Technical Field
The invention belongs to the field of highway engineering, and relates to a construction method of a weak surrounding rock tunnel in a water-rich area.
Background
The weak surrounding rock generally has the geological characteristics of low mechanical index, loose lithology, poor bearing capacity and high compressibility, and is easy to generate larger settlement deformation during tunnel construction when meeting the action of rock gap water, thereby causing potential safety hazards. Meanwhile, too much settlement after construction can bring great difficulty to the use and the overhaul treatment of the tunnel function in operation. Therefore, in the weak surrounding rock section, special attention needs to be paid to the selection of the tunnel construction method and correct treatment measures. The special weak surrounding rock and the basement in the water-rich area of the tunnel are effectively reinforced, and the safety of the highway in the construction process and the operation period is ensured.
The tunnel is one of the highway route components, plays an important role, and can greatly shorten the length of a road bus, so that the traveling efficiency and the highway transportation capacity of people are obviously improved. However, in the actual tunnel construction work, the construction project is often influenced by local geological factors, so that the tunnel construction quality is always unsatisfactory, especially weak surrounding rocks in water-rich areas can seriously reduce the safety quality and safety factor of the tunnel after construction, not only can greatly reduce the economic benefit of a tunnel construction unit, but also threatens the life safety of constructors and causes bad social influence, therefore, tunnel constructors need to deeply research the construction technology of the weak surrounding rock in the water-rich area and adopt reasonable construction technology according to the topographic characteristics of the construction site, thereby bringing the functions of the construction technology into play, reducing the occurrence of unsafe and unstable factors, being the important significance of the research of the subject, the safety of tunnel construction is guaranteed through subject research, and the construction quality of the tunnel can be guaranteed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a construction method of a weak surrounding rock tunnel in a water-rich area.
In order to achieve the purpose, the invention adopts the following technical scheme: a construction method of a weak surrounding rock tunnel in a water-rich area comprises the following steps:
both sides set up the inside ditch in the hole in the tunnel hole, and the inside ditch bottom in the hole sets up the horizontal drain pipe that the diameter is 100mm, and horizontal drain pipe is connected with the side formula drain pipe, and the side formula drain pipe diameter is 250mm, sets up the plastics french drain between the adjacent side formula drain pipe, and side formula drain pipe both ends set up the joint well, and joint well tip is connected with the double-walled bellows.
And waterproof mortar is coated on the inner side of the ditch in the hole.
The bottom of the ditch in the hole is paved with 100-200mm of fine sand.
The distance between adjacent plastic blind ditches is 1000 mm.
And sand wells are arranged on two sides in the tunnel.
Compared with the prior art, the invention has the beneficial effects that: according to the geological and topographic conditions of the tunnel, a reasonable drainage system is arranged in the tunnel to fully exert the function of the construction technology, so that the stability of the weak surrounding rock is maintained, particularly in the tunnel engineering construction process, the control strength on the weak surrounding rock needs to be increased, the influence of the weak surrounding rock on the quality of the tunnel is reduced by adopting scientific construction technical means, and the quality level of the tunnel engineering is obviously improved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a schematic view of the inner edge groove structure of the hole of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are provided only for illustrating the present invention and are not intended to limit the scope of the present invention.
Referring to fig. 1-2, a method for constructing a weak surrounding rock tunnel in a water-rich area includes the following steps: the tunnel is characterized in that hole inner side ditches 1 are arranged on two sides in the tunnel, a transverse drain pipe 11 with the diameter of 100mm is arranged at the bottom of each hole inner side ditch 1, each transverse drain pipe is connected with a side type drain pipe 12, the diameter of each side type drain pipe 12 is 250mm, a plastic blind ditch 121 is arranged between every two adjacent side type drain pipes 12, joint wells 122 are arranged at two ends of each side type drain pipe 12, and the end parts of the joint wells 122 are connected with double-wall corrugated pipes 1221.
And waterproof mortar is coated on the inner side of the in-hole side ditch 1. The waterproof mortar comprises the following components: cement: gluing: water = 1: 0.21: proper amount of water is evenly stirred and then coated on a base layer, and the cement: sand: gluing: water = 1: 1.5-2.5: 0.1-0.5: proper amount of water, proportioning, weighing, stirring and uniformly coating on a base layer to form a waterproof layer, wherein the thickness of the waterproof layer is generally more than 8-25mm, and the waterproof layer is flatly and smoothly smeared and pressed by a trowel in a layered manner. Epoxy resin is selected as the glue, and the waterproof mortar has good waterproof effect.
The bottom of the side ditch 1 in the hole is paved with 100-200mm of fine sand. The fine sand can be so that the impurity that falls into in the side ditch 1 in the hole is located the fine sand on the one hand, the later stage clearance hole of being convenient for in the impurity of side ditch 1, on the other hand fine sand can adsorb the moisture that filters in the side ditch 1 and reach better filter effect, avoids 1 jam of side ditch.
The distance between adjacent plastic blind grooves 121 is 1000 mm.
And sand wells 123 are arranged on two sides in the tunnel.
The excavation and lining processes are taken as key links of tunnel construction, the construction quality and progress of the whole tunnel are influenced, the excavation difficulty is gradually increased along with the increasing of the surrounding rock grade, particularly V-grade surrounding rock, rock mass is extremely broken and easy to weather, and the influence of blasting vibration is obvious, so that the twenty-four principles of 'pipe advancing, tight grouting, short footage, weak blasting, strong supporting, early sealing, frequent measurement and fast lining' are required to be strictly followed in the excavation process. In view of the complex formation of geological environment in water-rich areas and serious influence on tunnel construction, construction workers need to scientifically select construction technology according to construction sites, and reasonable drainage systems are arranged in the holes according to geological and topographic conditions of the tunnels to give full play to the functions of the construction technology, so that the stability of the weak surrounding rocks is maintained, particularly in the tunnel engineering construction process, the control strength on the weak surrounding rocks needs to be increased, scientific construction technical means are adopted, the influence of the weak surrounding rocks on the tunnel quality is reduced, and the quality level of the tunnel engineering is obviously improved.
The excavation and lining processes are taken as key links of tunnel construction, the construction quality and progress of the whole tunnel are influenced, the excavation difficulty is gradually increased along with the increasing of the surrounding rock grade, particularly V-grade surrounding rock, rock mass is extremely broken and easy to weather, and the influence of blasting vibration is obvious, so that the twenty-four principles of 'pipe advancing, tight grouting, short footage, weak blasting, strong supporting, early sealing, frequent measurement and fast lining' are required to be strictly followed in the excavation process.
In view of the complex formation of geological environment in water-rich areas and serious influence on tunnel construction, construction workers need to scientifically select construction technology according to construction sites, and reasonable drainage systems are arranged in the holes according to geological and topographic conditions of the tunnels to give full play to the functions of the construction technology, so that the stability of the weak surrounding rocks is maintained, particularly in the tunnel engineering construction process, the control strength on the weak surrounding rocks needs to be increased, scientific construction technical means are adopted, the influence of the weak surrounding rocks on the tunnel quality is reduced, and the quality level of the tunnel engineering is obviously improved.
Aiming at the construction of a weak surrounding rock tunnel in a water-rich area, reasonable technical measures are taken, the safety quality and the safety factor of the tunnel after construction are improved, the economic benefit of a tunnel construction unit is improved, the personal safety threat of constructors is reduced, the construction practice of a large deformation section of the water-rich weak surrounding rock of the tunnel strictly follows the construction principle of 'short footage, strong support, quick sealing, duty measurement and secondary lining following', the deformation of the tunnel can be effectively controlled, and the stability of the surrounding rock is kept. The project quickly sends the construction of the tunnel with the methane holes and the tunnel with the methane holes, efficiently and safely, not only accelerates the construction progress, but also effectively ensures the construction quality, and provides a certain reference for similar projects in the future by applying advanced geological forecast and monitoring measurement technology, adopting the principles of dynamic design and dynamic construction and taking the technical scheme and quality control of each construction process of advanced support construction, excavation construction method, arch centering construction, concrete injection construction, inverted arch construction, secondary lining construction and the like as a gripper.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (5)
1. A construction method of a weak surrounding rock tunnel in a water-rich area is characterized by comprising the following steps:
both sides set up the inside ditch in the hole in the tunnel hole, and the inside ditch bottom in the hole sets up the horizontal drain pipe that the diameter is 100mm, and horizontal drain pipe is connected with the side formula drain pipe, and the side formula drain pipe diameter is 250mm, sets up the plastics french drain between the adjacent side formula drain pipe, and side formula drain pipe both ends set up the joint well, and joint well tip is connected with the double-walled bellows.
2. The construction method of the weak surrounding rock tunnel in the water-rich area according to claim 1, characterized in that: and waterproof mortar is coated on the inner side of the ditch in the hole.
3. The construction method of the weak surrounding rock tunnel in the water-rich area according to claim 1, characterized in that: the bottom of the ditch in the hole is paved with 100-200mm of fine sand.
4. The construction method of the weak surrounding rock tunnel in the water-rich area according to claim 1, characterized in that: the distance between adjacent plastic blind ditches is 1000 mm.
5. The construction method of the weak surrounding rock tunnel in the water-rich area according to any one of claims 1 to 4, characterized in that: and sand wells are arranged on two sides in the tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223162.7A CN111412013A (en) | 2020-03-26 | 2020-03-26 | Construction method of weak surrounding rock tunnel in water-rich area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223162.7A CN111412013A (en) | 2020-03-26 | 2020-03-26 | Construction method of weak surrounding rock tunnel in water-rich area |
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| Publication Number | Publication Date |
|---|---|
| CN111412013A true CN111412013A (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010223162.7A Pending CN111412013A (en) | 2020-03-26 | 2020-03-26 | Construction method of weak surrounding rock tunnel in water-rich area |
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| Country | Link |
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| CN (1) | CN111412013A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798939A (en) * | 2010-03-17 | 2010-08-11 | 中铁隧道勘测设计院有限公司 | Maintainable tunnel drainage system |
| CN203065977U (en) * | 2013-01-10 | 2013-07-17 | 郑新海 | Open ditch under ramp |
| CN203200891U (en) * | 2013-04-27 | 2013-09-18 | 孔建光 | Drainage ditch of ramp |
| CN104120777A (en) * | 2013-11-05 | 2014-10-29 | 成都科创佳思科技有限公司 | Drainage ditch construction structure |
| CN104594946A (en) * | 2015-01-19 | 2015-05-06 | 中铁十八局集团有限公司 | Water-rich narrow tunnel water drainage structure under soft surrounding rock condition |
| CN204532378U (en) * | 2015-01-27 | 2015-08-05 | 中铁二院工程集团有限责任公司 | Subway tunneling boring rock tunnel development machine engineering method tunnel water handling constructs |
| CN206874310U (en) * | 2017-04-14 | 2018-01-12 | 长沙理工大学 | Be applicable to high-pressure rich water district tunnel decompression drainage device |
| CN207131450U (en) * | 2017-08-31 | 2018-03-23 | 中铁二院工程集团有限责任公司 | Hole construction by the diversion of region of FuShui tunnel |
| CN208073551U (en) * | 2018-04-19 | 2018-11-09 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel drainage system |
| CN209724369U (en) * | 2019-01-31 | 2019-12-03 | 中铁科学研究院有限公司 | A kind of single line seabed tunnel can safeguard drainage system |
-
2020
- 2020-03-26 CN CN202010223162.7A patent/CN111412013A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798939A (en) * | 2010-03-17 | 2010-08-11 | 中铁隧道勘测设计院有限公司 | Maintainable tunnel drainage system |
| CN203065977U (en) * | 2013-01-10 | 2013-07-17 | 郑新海 | Open ditch under ramp |
| CN203200891U (en) * | 2013-04-27 | 2013-09-18 | 孔建光 | Drainage ditch of ramp |
| CN104120777A (en) * | 2013-11-05 | 2014-10-29 | 成都科创佳思科技有限公司 | Drainage ditch construction structure |
| CN104594946A (en) * | 2015-01-19 | 2015-05-06 | 中铁十八局集团有限公司 | Water-rich narrow tunnel water drainage structure under soft surrounding rock condition |
| CN204532378U (en) * | 2015-01-27 | 2015-08-05 | 中铁二院工程集团有限责任公司 | Subway tunneling boring rock tunnel development machine engineering method tunnel water handling constructs |
| CN206874310U (en) * | 2017-04-14 | 2018-01-12 | 长沙理工大学 | Be applicable to high-pressure rich water district tunnel decompression drainage device |
| CN207131450U (en) * | 2017-08-31 | 2018-03-23 | 中铁二院工程集团有限责任公司 | Hole construction by the diversion of region of FuShui tunnel |
| CN208073551U (en) * | 2018-04-19 | 2018-11-09 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel drainage system |
| CN209724369U (en) * | 2019-01-31 | 2019-12-03 | 中铁科学研究院有限公司 | A kind of single line seabed tunnel can safeguard drainage system |
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Application publication date: 20200714 |
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| RJ01 | Rejection of invention patent application after publication |