CN111878112A - Karst cave section concrete spraying construction method based on karst cave underground river environment tunnel construction - Google Patents
Karst cave section concrete spraying construction method based on karst cave underground river environment tunnel construction Download PDFInfo
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- CN111878112A CN111878112A CN202010753942.2A CN202010753942A CN111878112A CN 111878112 A CN111878112 A CN 111878112A CN 202010753942 A CN202010753942 A CN 202010753942A CN 111878112 A CN111878112 A CN 111878112A
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- 238000010276 construction Methods 0.000 title claims abstract description 40
- 238000005507 spraying Methods 0.000 title claims abstract description 35
- 239000004567 concrete Substances 0.000 title claims abstract description 32
- 239000011435 rock Substances 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 241001330002 Bambuseae Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000011120 plywood Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000004062 sedimentation Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000011378 shotcrete Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Images
Classifications
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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
- E21D11/006—Lining anchored in the rock
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
-
- 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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- 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
-
- 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Architecture (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
A karst cave section concrete spraying construction method based on karst cave underground river environment tunnel construction comprises the following steps: s1: cleaning the cave wall of the karst cave, and spraying concrete to seal the rock surface except the vault part of the section B of the tunnel; s2: uniformly constructing a plurality of anchor cables on the wall of the hole; s3: filling the karst cave and connecting the anchor cable with the filled backfill body; s4: excavating the backfill body to form a tunnel section B communicated with the tunnel section A; s5: cleaning a sprayed surface of a section B of the tunnel; s6: primarily spraying concrete to the section B of the tunnel to seal the rock surface of the section B of the tunnel; s7: constructing anchor rods, steel frames and reinforcing mesh on the section B of the tunnel; s8: and spraying the concrete again to the designed thickness. Has the advantages of stability, reliability, high safety and capability of preventing sedimentation.
Description
Technical Field
The invention mainly relates to a tunnel construction technology of a karst cave underground river environment, in particular to a karst cave section concrete spraying construction method based on the tunnel construction of the karst cave underground river environment.
Background
The Yujing mountain tunnel is located in Wexin county of Yunnan province, has the total length of 6306m and is a double-line tunnel. In 2016, 7, 23 days, a cave is detected by drilling a hole in advance on the small-mileage end face of a cross-cave working area, and a huge cave hall and a river are discovered after the cave is revealed. The karst cave is about 230m in transverse length and about 93m in width and is approximately rectangular, the top of the karst cave is in a vault shape, the vertical heights of halls are different from 50 m to 130m, the right side of the karst cave in the line direction is high, and the left side of the karst cave is low; and a river develops at the slope toe at the left side of the karst cave, and the river surface is 5-15 m wide. The tunnel passes through the huge karst cave hall, the two sides of the huge karst cave hall are provided with a tunnel section A, and the tunnel passes through the karst cave hall and is provided with a tunnel section B.
Because the tunnel needs to pass through a huge karst cave hall and the bottom is provided with a river, high risks are brought to early construction and later operation, such as block falling at the top of the karst cave, sinking at the bottom due to the river and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a karst cave section concrete spraying construction method which is stable, reliable, high in safety and capable of preventing settlement and is based on the construction of a tunnel in a karst cave underground river environment.
In order to solve the technical problems, the invention adopts the following technical scheme:
a karst cave section concrete spraying construction method based on construction of a tunnel in a karst cave and a river in the bottom of the karst cave is provided, the tunnel passes through the karst cave, the tunnels at two ends of the karst cave are tunnel A sections, and the tunnel passing through the karst cave is tunnel B section; the construction method comprises the following steps:
s1: cleaning the cave wall of the karst cave, and spraying concrete to seal the rock surface except the vault part of the section B of the tunnel;
s2: uniformly constructing a plurality of anchor cables on the wall of the hole;
s3: filling the karst cave and connecting the anchor cable with the filled backfill body;
s4: excavating the backfill body to form a tunnel section B communicated with the tunnel section A;
s5: cleaning a sprayed surface of a section B of the tunnel;
s6: primarily spraying concrete to the section B of the tunnel to seal the rock surface of the section B of the tunnel;
s7: constructing anchor rods, steel frames and reinforcing mesh on the section B of the tunnel;
s8: and spraying the concrete again to the designed thickness.
As a further improvement of the above technical solution:
in step S1, steel fibers are applied to the cave wall and concrete is sprayed.
In step S3, grouting is performed in the gap between the backfill body and the cavern wall to seal the gap.
In step S4, the lining construction is performed while performing support while excavating.
In step S6, bamboo plywood is used as a template for the section B of the tunnel.
Compared with the prior art, the invention has the advantages that:
the invention relates to a karst cave section concrete spraying construction method based on karst cave underground river environment tunnel construction, which is characterized in that the method is adopted, the concrete spraying seals the rock surface except the vault part of the tunnel B section, the initial concrete spraying is carried out in time after the excavation, the low-lying part is approximately sprayed flat, then the layering and the reciprocating spraying are carried out from bottom to top, then the anchor rope is applied, the karst cave is filled and the anchor rope is connected with the filled backfill body, and finally the initial spraying and the repeated spraying of the tunnel B section are carried out. By the construction of spraying concrete to the cave wall of the karst cave, the phenomenon of block falling of the top of the karst cave can not be caused during the subsequent construction of the anchor cable and the backfill body, and the safety is improved; the backfill body is connected with the wall of the karst cave by using the anchor cable, so that the backfill body can be prevented from settling, and the stability and reliability of the section B of the tunnel are improved.
Drawings
Fig. 1 is a plan view of the cave-underground river environment of the present invention.
FIG. 2 is a flow chart of a karst cave section concrete spraying construction method based on the construction of a tunnel in a karst cave underground river environment.
The reference numerals in the figures denote:
1. karst cave; 2. a river under the river.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
As shown in fig. 1 and 2, in an embodiment of the karst cave section shotcrete construction method based on karst cave underground river environment tunnel construction of the present invention, an environment includes a karst cave 1 and an underground river 2 located at the bottom of the karst cave 1, the tunnel passes through the karst cave 1, the tunnels at both ends of the karst cave 1 are tunnel a sections, and the tunnel passing through the karst cave 1 is tunnel B sections; the construction method comprises the following steps:
s1: cleaning the cave wall of the karst cave 1, and spraying concrete to seal the rock surface except the vault part of the section B of the tunnel;
s2: uniformly constructing a plurality of anchor cables on the wall of the hole;
s3: filling the karst cave 1, and connecting the anchor cable with the filled backfill body;
s4: excavating the backfill body to form a tunnel section B communicated with the tunnel section A;
s5: cleaning a sprayed surface of a section B of the tunnel;
s6: primarily spraying concrete to the section B of the tunnel to seal the rock surface of the section B of the tunnel;
s7: constructing anchor rods, steel frames and reinforcing mesh on the section B of the tunnel;
s8: and spraying the concrete again to the designed thickness.
By adopting the method, the sprayed concrete seals the rock surface except the vault part of the section B of the tunnel, the primary sprayed concrete is carried out in time after the excavation, the thickness of the primary sprayed surface is not less than 4cm, the low-lying part is roughly sprayed, then the layered and reciprocating spraying is carried out from bottom to top, then the anchor cable is applied, the karst cave 1 is filled and the anchor cable is connected with the filled backfill body, and finally the primary spraying and the secondary spraying of the section B of the tunnel are carried out. By the construction of spraying concrete on the cave wall of the karst cave 1, the phenomenon that the block falls from the top of the karst cave 1 is avoided during the subsequent construction of the anchor rope and the backfill body, and the safety is improved; the backfill body is connected with the cave wall of the karst cave 1 by using the anchor cable, so that the backfill body can be prevented from settling, and the stability and the reliability of the section B of the tunnel are improved.
In this embodiment, in step S1, steel fibers are applied to the cavity wall of the cavern 1, and concrete is sprayed. The structure is stable and reliable, and the operation is convenient.
In this embodiment, in step S3, grouting is performed in the gap between the backfill body and the cave wall of the cavern 1 to seal the gap. The stability and the reliability of the backfill body are further improved.
In this embodiment, in step S4, lining construction is performed while performing support while excavating. In this way, the stability and reliability of the excavated cavity can be ensured.
In this embodiment, in step S6, a bamboo plywood is used as a template for the section B of the tunnel. The operation is convenient and reliable.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (5)
1. A karst cave section concrete spraying construction method based on karst cave underground river environment tunnel construction is characterized in that the environment comprises a karst cave (1) and an underground river (2) located at the bottom of the karst cave (1), the tunnel penetrates through the karst cave (1), the tunnels at two ends of the karst cave (1) are a tunnel A section, and the tunnel penetrating through the karst cave (1) is a tunnel B section; the construction method comprises the following steps:
s1: cleaning the wall of the karst cave (1), and spraying concrete to seal the rock surface except the vault part of the section B of the tunnel;
s2: uniformly constructing a plurality of anchor cables on the wall of the hole;
s3: filling the karst cave (1) and connecting the anchor cable with the filled backfill body;
s4: excavating the backfill body to form a tunnel section B communicated with the tunnel section A;
s5: cleaning a sprayed surface of a section B of the tunnel;
s6: primarily spraying concrete to the section B of the tunnel to seal the rock surface of the section B of the tunnel;
s7: constructing anchor rods, steel frames and reinforcing mesh on the section B of the tunnel;
s8: and spraying the concrete again to the designed thickness.
2. The karst cave section concrete spraying construction method based on karst cave underground river environment tunnel construction according to claim 1, characterized in that: in step S1, steel fibers are applied to the cavity wall of the cave (1), and concrete is sprayed.
3. The karst cave section concrete spraying construction method based on karst cave underground river environment tunnel construction according to claim 2, characterized in that: in step S3, grouting is performed in the gap between the backfill body and the cavity wall of the cavern (1) to seal the gap.
4. The karst cave section concrete spraying construction method based on karst cave underground river environment tunnel construction according to claim 3, characterized in that: in step S4, the lining construction is performed while performing support while excavating.
5. The karst cave section concrete spraying construction method based on karst cave underground river environment tunnel construction according to claim 4, characterized in that: in step S6, bamboo plywood is used as a template for the section B of the tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010753942.2A CN111878112A (en) | 2020-07-30 | 2020-07-30 | Karst cave section concrete spraying construction method based on karst cave underground river environment tunnel construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010753942.2A CN111878112A (en) | 2020-07-30 | 2020-07-30 | Karst cave section concrete spraying construction method based on karst cave underground river environment tunnel construction |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864960A (en) * | 2010-05-17 | 2010-10-20 | 中铁二十局集团有限公司 | Carst region double-arch road tunnel construction method |
| CN101922300A (en) * | 2010-08-30 | 2010-12-22 | 中铁第四勘察设计院集团有限公司 | Large supporting and protecting system of tunnel in hollow solution cavity |
| CN101922303A (en) * | 2010-08-30 | 2010-12-22 | 中铁第四勘察设计院集团有限公司 | Method for treating tunnel passing through underground river karst hall |
| CN104481552A (en) * | 2014-10-29 | 2015-04-01 | 中铁三局集团有限公司 | Construction method of roof rockfall protection for super karst caves |
| CN104563120A (en) * | 2014-10-29 | 2015-04-29 | 中铁三局集团有限公司 | Tunnel karst cave ultra-large volume concrete hierarchical and regional preserved hole adding casting construction method |
| CN106988758A (en) * | 2017-05-08 | 2017-07-28 | 中铁五局集团第五工程有限责任公司 | One kind is used to pass through large-scale vertical solution cavity group method for tunnel construction |
| CN108979644A (en) * | 2018-08-07 | 2018-12-11 | 中电建路桥集团有限公司 | A kind of rich water tunnel solution cavity collapses processing and tunnel excavation construction method |
| CN109630137A (en) * | 2019-01-31 | 2019-04-16 | 中铁十四局集团建筑工程有限公司 | An a kind of tunnel high position passes through the backfill processing construction method of huge molten chamber |
| CN111396095A (en) * | 2020-04-21 | 2020-07-10 | 中铁二院工程集团有限责任公司 | Tunnel simply-supported arch open cut tunnel structure penetrating through giant karst cave and construction method thereof |
| CN111411993A (en) * | 2020-04-21 | 2020-07-14 | 中铁二院工程集团有限责任公司 | Large-section tunnel supporting system penetrating through huge karst cave hall and construction method |
| CN111412002A (en) * | 2020-04-21 | 2020-07-14 | 中铁二院工程集团有限责任公司 | Anchor cable counter-pulling type supporting structure system and construction method |
-
2020
- 2020-07-30 CN CN202010753942.2A patent/CN111878112A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864960A (en) * | 2010-05-17 | 2010-10-20 | 中铁二十局集团有限公司 | Carst region double-arch road tunnel construction method |
| CN101922300A (en) * | 2010-08-30 | 2010-12-22 | 中铁第四勘察设计院集团有限公司 | Large supporting and protecting system of tunnel in hollow solution cavity |
| CN101922303A (en) * | 2010-08-30 | 2010-12-22 | 中铁第四勘察设计院集团有限公司 | Method for treating tunnel passing through underground river karst hall |
| CN104481552A (en) * | 2014-10-29 | 2015-04-01 | 中铁三局集团有限公司 | Construction method of roof rockfall protection for super karst caves |
| CN104563120A (en) * | 2014-10-29 | 2015-04-29 | 中铁三局集团有限公司 | Tunnel karst cave ultra-large volume concrete hierarchical and regional preserved hole adding casting construction method |
| CN106988758A (en) * | 2017-05-08 | 2017-07-28 | 中铁五局集团第五工程有限责任公司 | One kind is used to pass through large-scale vertical solution cavity group method for tunnel construction |
| CN108979644A (en) * | 2018-08-07 | 2018-12-11 | 中电建路桥集团有限公司 | A kind of rich water tunnel solution cavity collapses processing and tunnel excavation construction method |
| CN109630137A (en) * | 2019-01-31 | 2019-04-16 | 中铁十四局集团建筑工程有限公司 | An a kind of tunnel high position passes through the backfill processing construction method of huge molten chamber |
| CN111396095A (en) * | 2020-04-21 | 2020-07-10 | 中铁二院工程集团有限责任公司 | Tunnel simply-supported arch open cut tunnel structure penetrating through giant karst cave and construction method thereof |
| CN111411993A (en) * | 2020-04-21 | 2020-07-14 | 中铁二院工程集团有限责任公司 | Large-section tunnel supporting system penetrating through huge karst cave hall and construction method |
| CN111412002A (en) * | 2020-04-21 | 2020-07-14 | 中铁二院工程集团有限责任公司 | Anchor cable counter-pulling type supporting structure system and construction method |
Non-Patent Citations (2)
| Title |
|---|
| 叶堃: "新建成贵线玉京山隧道岩溶大厅综合治理研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 张广泽等: "高速铁路隧道岩溶灾害及防治关键技术研究", 《铁道标准设计》 * |
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Application publication date: 20201103 |
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