CN111878089A - Karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction - Google Patents
Karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction Download PDFInfo
- Publication number
- CN111878089A CN111878089A CN202010752382.9A CN202010752382A CN111878089A CN 111878089 A CN111878089 A CN 111878089A CN 202010752382 A CN202010752382 A CN 202010752382A CN 111878089 A CN111878089 A CN 111878089A
- Authority
- CN
- China
- Prior art keywords
- karst cave
- tunnel
- section
- underground river
- cave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 45
- 230000002787 reinforcement Effects 0.000 title claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
-
- 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
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
-
- 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
-
- 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
- E21D20/00—Setting anchoring-bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Paleontology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction comprises the following steps: s1: excavating the tunnel A section to a communicated karst cave; s2: the underground river is diverted so that the underground river does not flow through the karst cave; s3: backfilling the karst cave until the karst cave is backfilled to the foundation surface of the tunnel; s4: protecting the cave wall of the karst cave, and uniformly applying a plurality of anchor cables on the cave wall; s5: filling the karst cave and connecting the anchor cable with the filled backfill body; s6: excavating the backfill body to form a tunnel section B communicated with the tunnel section A; s7: measuring and lofting the bottom of the section B of the tunnel, and drilling holes according to lofting points; s8: placing a sheathing material in the hole; s9: applying sleeve valve tubes in the holes; s10: and performing sectional grouting from the bottom of the hole upwards. 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 grouting reinforcement construction method based on 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 provides a karst cave section grouting reinforcement 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 and underground river environment.
In order to solve the technical problems, the invention adopts the following technical scheme:
a karst cave section grouting reinforcement construction method based on construction of a karst cave underground river environment tunnel is characterized in that the environment comprises a karst cave and an underground river positioned at the bottom of the karst cave, the tunnel penetrates through the karst cave, the tunnels at two ends of the karst cave are tunnel A sections, and the tunnel penetrating through the karst cave is tunnel B section; the construction method comprises the following steps:
s1: excavating the tunnel A section to a communicated karst cave;
s2: the underground river is diverted so that the underground river does not flow through the karst cave;
s3: backfilling the karst cave until the karst cave is backfilled to the foundation surface of the tunnel;
s4: protecting the cave wall of the karst cave, and uniformly applying a plurality of anchor cables on the cave wall;
s5: filling the karst cave and connecting the anchor cable with the filled backfill body;
s6: excavating the backfill body to form a tunnel section B communicated with the tunnel section A;
s7: measuring and lofting the bottom of the section B of the tunnel, and drilling holes according to lofting points;
s8: placing a sheathing material in the hole;
s9: applying sleeve valve tubes in the holes;
s10: and performing sectional grouting from the bottom of the hole upwards.
As a further improvement of the above technical solution:
in step S1, the lining construction is performed while performing support while excavating.
In step S2, a drainage tunnel is formed in communication with the river upstream so that the river does not flow through the cavern.
And plugging and backfilling the underground river at the downstream of the junction of the drainage tunnel and the underground river.
In step S4, steel fibers are applied to the cave wall and concrete is sprayed.
In step S5, grouting is performed in the gap between the backfill body and the cavern wall to seal the gap.
In step S6, the lining construction is performed while performing support while excavating.
In step S7, drilling is performed from both sides of the bottom surface of the tunnel B section toward the middle, and drilling is performed from both ends of the tunnel B section toward the middle.
Compared with the prior art, the invention has the advantages that:
the karst cave section grouting reinforcement construction method based on the karst cave underground river environment tunnel construction comprises the following steps of changing the way of an underground river so that the underground river does not flow through a karst cave and the influence of a water area on the bottom of the karst cave is eliminated; backfilling the karst cave until the karst cave is filled with the materials, namely performing reconstruction treatment on the karst cave to prevent blocks from falling from the top of the karst cave; the backfill body is connected with the cave wall of the karst cave by using the anchor cable, and then the diversion of the underground river is matched, 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; through the sectional type slip casting to tunnel B section base, can play the basement reinforcing effect, further improved the stability and the reliability of tunnel B section.
Drawings
Fig. 1 is a plan view of the cave-underground river environment of the present invention.
Fig. 2 is a plan view of the cave river environment of the present invention (with a spillway tunnel).
Fig. 3 is a schematic structural view of the grouting reinforcement in the invention.
The reference numerals in the figures denote:
1. karst cave; 2. a river under the river; 3. a water drainage hole.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
As shown in fig. 1 to 3, an embodiment of a karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction of the present invention 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 section; the construction method comprises the following steps:
s1: excavating a tunnel section A to a communicating karst cave 1;
s2: the underground river 2 is diverted, so that the underground river 2 does not flow through the karst cave 1;
s3: backfilling the karst cave 1 until the karst cave is backfilled to the foundation surface of the tunnel;
s4: protecting the cave wall of the karst cave 1, and uniformly applying a plurality of anchor cables on the cave wall;
s5: filling the karst cave 1, and connecting the anchor cable with the filled backfill body;
s6: excavating the backfill body to form a tunnel section B communicated with the tunnel section A;
s7: measuring and lofting the bottom of the section B of the tunnel, and drilling holes according to lofting points;
s8: placing a sheathing material in the hole;
s9: applying sleeve valve tubes in the holes;
s10: and performing sectional grouting from the bottom of the hole upwards.
In the method, the underground river 2 is diverted so that the underground river 2 does not flow through the karst cave 1, and the influence of a water area on the bottom of the karst cave 1 is eliminated; the karst cave 1 is backfilled until the karst cave is filled, namely the karst cave 1 is subjected to reconstruction treatment, so that the top of the karst cave 1 is prevented from dropping blocks, and the safety is improved; the backfill body is connected with the cave wall of the karst cave 1 by using the anchor cable, and then the diversion of the underground river 2 is matched, so that the backfill body can be prevented from settling, and the stability and reliability of the section B of the tunnel are improved; through the sectional type slip casting to tunnel B section base, can play the basement reinforcing effect, further improved the stability and the reliability of tunnel B section.
In this embodiment, in step S1, lining construction is performed while performing support while excavating. By adopting the mode, the stability and the reliability of the excavated cavern can be ensured.
In this embodiment, in step S2, a drainage tunnel 3 communicating with the upstream of the underground river 2 is implemented so that the underground river 2 does not flow through the cavern 1. The water at the upstream of the underground river 2 is diverted by the drainage tunnel 3 and flows out from the area outside the karst cave 1, so that the subsequent backfill body can be prevented from generating settlement.
In this embodiment, the underground river 2 downstream of the junction of the drainage tunnel 3 and the underground river 2 is blocked and backfilled. Therefore, the phenomenon of water immersion can be prevented, and the subsequent backfilling construction is facilitated.
In this embodiment, in step S4, steel fibers are applied to the cavity wall of the cavern 1, and concrete is sprayed. The arrangement is convenient for the implementation of the anchor cable, and simultaneously, the block falling at the top of the karst cave 1 can be prevented.
In this embodiment, in step S5, 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 S6, lining construction is performed while performing support while excavating. By adopting the mode, the stability and the reliability of the excavated cavern can be ensured.
In this embodiment, in step S7, the holes are drilled from both sides of the bottom surface of the tunnel B section to the middle, and the holes are drilled from both ends of the tunnel B section to the middle. The construction quality and efficiency are ensured.
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 (8)
1. A karst cave section grouting reinforcement 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), 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: excavating a tunnel section A to a communicating karst cave (1);
s2: the underground river (2) is diverted, so that the underground river (2) does not flow through the karst cave (1);
s3: backfilling the karst cave (1) until the karst cave is backfilled to the tunnel foundation surface;
s4: protecting the cave wall of the karst cave (1), and uniformly applying a plurality of anchor cables on the cave wall;
s5: filling the karst cave (1) and connecting the anchor cable with the filled backfill body;
s6: excavating the backfill body to form a tunnel section B communicated with the tunnel section A;
s7: measuring and lofting the bottom of the section B of the tunnel, and drilling holes according to lofting points;
s8: placing a sheathing material in the hole;
s9: applying sleeve valve tubes in the holes;
s10: and performing sectional grouting from the bottom of the hole upwards.
2. The karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction according to claim 1, characterized in that: in step S1, the lining construction is performed while performing support while excavating.
3. The karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction according to claim 2, characterized in that: in step S2, a drainage tunnel (3) communicating with the upstream of the underground river (2) is constructed so that the underground river (2) does not flow through the cavern (1).
4. The karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction according to claim 3, characterized in that: and plugging and backfilling the underground river (2) at the downstream of the junction of the drainage tunnel (3) and the underground river (2).
5. The karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction according to claim 4, characterized in that: in step S4, steel fibers are applied to the cavity wall of the cave (1), and concrete is sprayed.
6. The karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction according to claim 5, characterized in that: in step S5, grouting is performed in the gap between the backfill body and the cavity wall of the cavern (1) to seal the gap.
7. The karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction according to claim 6, characterized in that: in step S6, the lining construction is performed while performing support while excavating.
8. The karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction according to any one of claims 1 to 7, characterized in that: in step S7, drilling is performed from both sides of the bottom surface of the tunnel B section toward the middle, and drilling is performed from both ends of the tunnel B section toward the middle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010752382.9A CN111878089A (en) | 2020-07-30 | 2020-07-30 | Karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010752382.9A CN111878089A (en) | 2020-07-30 | 2020-07-30 | Karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111878089A true CN111878089A (en) | 2020-11-03 |
Family
ID=73205853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010752382.9A Pending CN111878089A (en) | 2020-07-30 | 2020-07-30 | Karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111878089A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672197A (en) * | 2009-09-17 | 2010-03-17 | 铁道部工程管理中心 | Processing method for high-pressure water-enriched filling karst cavity |
| CN201771516U (en) * | 2010-08-30 | 2011-03-23 | 中铁第四勘察设计院集团有限公司 | Supporting structure of district passing through cavern and underground river for tunnel |
| CN102251777A (en) * | 2011-05-31 | 2011-11-23 | 中铁二十局集团第一工程有限公司 | Large-scale karst cavity treatment method for karst tunnel |
| CN104532821A (en) * | 2014-10-29 | 2015-04-22 | 中铁三局集团有限公司 | Extra-large karst cave bottom treatment 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 |
| 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 |
| CN109826081A (en) * | 2019-03-29 | 2019-05-31 | 中交路桥建设有限公司 | Large-scale solution cavity, underground river span of arch structure and construction method in a kind of tunnel |
| 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 |
-
2020
- 2020-07-30 CN CN202010752382.9A patent/CN111878089A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672197A (en) * | 2009-09-17 | 2010-03-17 | 铁道部工程管理中心 | Processing method for high-pressure water-enriched filling karst cavity |
| CN201771516U (en) * | 2010-08-30 | 2011-03-23 | 中铁第四勘察设计院集团有限公司 | Supporting structure of district passing through cavern and underground river for tunnel |
| CN102251777A (en) * | 2011-05-31 | 2011-11-23 | 中铁二十局集团第一工程有限公司 | Large-scale karst cavity treatment method for karst tunnel |
| CN104532821A (en) * | 2014-10-29 | 2015-04-22 | 中铁三局集团有限公司 | Extra-large karst cave bottom treatment 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 |
| 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 |
| CN109826081A (en) * | 2019-03-29 | 2019-05-31 | 中交路桥建设有限公司 | Large-scale solution cavity, underground river span of arch structure and construction method in a kind of tunnel |
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| 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》 * |
| 张祥等: "隧道穿越巨型溶洞弃碴回填体注浆加固技术研究", 《现代隧道技术》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110173267B (en) | Construction method for subway shield zone to pass through existing station | |
| WO2021223573A1 (en) | Construction structure for communication and connection between newly added mined channel and existing station hall layer | |
| CN105201448A (en) | Method for water-stopping grouting plugging in high-pressure high-flow water gush channel | |
| CN105201001B (en) | Composite seepage preventing structure for large karst cave in karst region and construction method thereof | |
| CN104631475A (en) | Safe and fast construction method of down-traversing river shallow depth bored tunnel | |
| CN106968690A (en) | The method for tunnel construction for soil property of caving in | |
| CN205012288U (en) | Embankment dam pitch core -wall base | |
| CN109488329A (en) | A kind of broken water drenching country rock administering method of Deep Soft Rock Tunnel large deformation | |
| CN110259490A (en) | A kind of Underground Subway Station construction method | |
| CN105804097A (en) | Cantilever structure way for treating landslides in cooperation with h-shaped anti-sliding piles and construction method of cantilever structure way | |
| CN109518722A (en) | The short underpass structure and its construction method of newly-built basement and existing subway station | |
| CN112065444A (en) | Continuous beam construction method based on karst cave underground river environment tunnel construction | |
| CN201406687Y (en) | Deep foundation pit supporting structure | |
| CN111878089A (en) | Karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction | |
| CN203891047U (en) | Equipment equipped with steel platform for foundation construction of land bridge | |
| CN112065442A (en) | Continuous beam closure section construction method based on karst cave underground river environment tunnel construction | |
| CN111878090A (en) | Karst cave section anchor rod construction method based on karst cave underground river environment tunnel construction | |
| CN111894603A (en) | Tunnel construction method based on karst cave underground river environment | |
| CN111878093A (en) | Construction method for side area of tunnel main tunnel in tunnel construction of karst cave and underground river environment | |
| CN109024621A (en) | The compound retaining wall supporting construction of embankment high slope tubular pole and its construction method | |
| CN111878088A (en) | Karst cave section logistics channel construction method based on karst cave underground river environment tunnel construction | |
| CN112065445A (en) | Karst cave section excavation supporting construction method based on karst cave underground river environment tunnel construction | |
| CN112554886A (en) | Tunnel main tunnel area construction method based on karst cave underground river environment tunnel construction | |
| CN114320365A (en) | Rapid construction method of integral prefabricated reinforced concrete lining tunnel | |
| CN212129177U (en) | Boot-shaped root anchor anti-slide pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201103 |
|
| RJ01 | Rejection of invention patent application after publication |