CN111140248A - Bias tunnel structure applying prestress to pilot tunnel and construction method thereof - Google Patents
Bias tunnel structure applying prestress to pilot tunnel and construction method thereof Download PDFInfo
- Publication number
- CN111140248A CN111140248A CN202010057586.0A CN202010057586A CN111140248A CN 111140248 A CN111140248 A CN 111140248A CN 202010057586 A CN202010057586 A CN 202010057586A CN 111140248 A CN111140248 A CN 111140248A
- Authority
- CN
- China
- Prior art keywords
- tunnel
- prestressed
- pilot tunnel
- anchor cable
- pilot
- 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.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 238000005553 drilling Methods 0.000 claims abstract description 8
- 238000004873 anchoring Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 7
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 3
- 238000007596 consolidation process Methods 0.000 claims description 3
- 210000002435 tendon Anatomy 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 abstract description 17
- 238000009412 basement excavation Methods 0.000 abstract description 9
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 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
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- 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
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- 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
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a bias tunnel structure applying prestress to a pilot tunnel and a construction method thereof, wherein the bias tunnel structure comprises a tunnel and a frame beam fixed on the surface of a slope, a prestressed anchor cable is connected between the pilot tunnel and the frame beam of the tunnel, and the construction method comprises the following steps: drilling a hole from the ground surface of the bias low-side slope to the pilot tunnel to be excavated; constructing a frame beam on the surface of the side slope, excavating a pilot tunnel, placing a prestressed anchor cable into a drill hole, anchoring one end of the prestressed anchor cable on the frame beam, applying prestress to the prestressed anchor cable, and then fixing the other end of the prestressed anchor cable on the hole wall of the pilot tunnel to form active reinforcement for the biased low-side slope. The invention applies the prestressed anchor cable between the pilot tunnel and the side slope earth surface, can form active reinforcement to the mountain side slope, and carries out tunnel expanding excavation construction after the reinforcement is finished, so as to ensure the excavation safety and the side slope stability of the whole large-section tunnel.
Description
Technical Field
The invention relates to the technical field of tunnel engineering, in particular to a bias tunnel structure applying prestress to a pilot tunnel and a construction method thereof.
Background
When the tunnel enters a hole in a bias terrain, diseases such as slope slippage collapse, sinking crack deformation in the hole and the like are easy to occur, and particularly, the stability of a mountain is more difficult to ensure for a large-section tunnel, so that great difficulty is brought to engineering construction. The existing commonly used bias tunnel reinforcement measures mainly comprise surface grouting, anchoring piles, surface mortar anchor rods, back pressure low mountain side surface and the like, and prestress anchor cables can be applied from the surface, but in the traditional technology, anchor cables are applied outside tunnel excavation contour lines, surface reinforcement is not directly connected with in-hole construction, and a technical scheme for reinforcing the surface and the in-hole together is not provided, so that the traditional reinforcement measures have the defects of large engineering quantity and unobvious reinforcement effect.
Disclosure of Invention
The invention aims to: aiming at the problems in the prior art, the bias tunnel structure applying prestress to the pilot tunnel and the construction method thereof are provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
a bias tunnel structure applying prestress to a pilot tunnel comprises a tunnel and a frame beam fixed on the surface of a slope, wherein a prestressed anchor cable is connected between the pilot tunnel of the tunnel and the frame beam.
According to the bias tunnel structure with the pilot tunnel applying prestress, the prestressed anchor cables are connected between the pilot tunnel and the surface of the slope, so that active reinforcement can be formed on the mountain slope, and tunnel expanding excavation construction is performed after reinforcement is completed, so that the excavation safety and the slope stability of the whole large-section tunnel are guaranteed. And the frame beam is firmly fixed on the surface of the side slope by applying prestress, so that the problem of infirm surface structure in the past is avoided, and the effective reinforcement can be formed on the surface of the side slope.
As a preferable scheme of the invention, the prestress of the prestressed anchor cable is greater than or equal to 5 tons.
As a preferable aspect of the present invention, the prestressed anchor cable includes a steel pipe and a tendon disposed in the steel pipe, and the steel pipe is filled with cement slurry.
As a preferable mode of the present invention, one end of the prestressed anchor cable is anchored to the frame beam, and the other end thereof is fixed to the wall of the pilot tunnel.
As the preferred scheme of the invention, the frame beam is a reinforced concrete frame structure.
As a preferable aspect of the present invention, the frame beam is provided at a bias low side of the slope.
The invention also discloses a construction method of the bias tunnel structure applying prestress to the pilot tunnel, which comprises the following steps:
the method comprises the following steps: drilling a hole from the ground surface of the bias low-side slope to the pilot tunnel to be excavated;
step two: constructing a frame beam on the surface of the side slope, excavating the pilot tunnel, placing a prestressed anchor cable into the drilling hole, anchoring one end of the prestressed anchor cable on the frame beam, applying prestress to the prestressed anchor cable, and then fixing the other end of the prestressed anchor cable on the hole wall of the pilot tunnel to form active reinforcement for the biased low side slope.
The method is characterized in that a prestressed anchor cable is applied between a pilot tunnel and the surface of a side slope, active reinforcement can be formed on the side slope of the mountain, and tunnel expanding excavation construction is performed after reinforcement is completed, so that the excavation safety and the side slope stability of the whole large-section tunnel are ensured; the frame beam is firmly fixed on the surface of the side slope by applying prestress, so that the problem of infirm surface structure in the past is avoided, and effective reinforcement can be formed on the surface of the side slope.
As a preferred embodiment of the present invention, the second step comprises:
s21: drilling a steel perforated pipe into the borehole to the profile of the pilot tunnel, and constructing a frame beam on the surface of the side slope;
s22: excavating the pilot tunnel, after the steel flower pipes are exposed, putting a reinforcing bar bundle into the steel flower pipes and extending out of the surface of the side slope;
s23: and anchoring and connecting one end of the steel bar bundle with the frame beam, applying prestress to the steel bar bundle, and injecting slurry into the steel perforated pipe for consolidation.
As a preferable aspect of the present invention, the prestress is greater than or equal to 5 tons.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention applies the prestressed anchor cable between the pilot tunnel and the side slope earth surface, can form active reinforcement to the mountain side slope, and carries out tunnel expanding excavation construction after the reinforcement is finished, so as to ensure the excavation safety and the side slope stability of the whole large-section tunnel.
2. The frame beam is firmly fixed on the surface of the side slope by applying prestress, so that the problem of infirm structure of the surface in the past is avoided, and the effective reinforcement can be formed on the surface of the side slope.
Drawings
FIG. 1 is a schematic structural diagram of a biased tunnel structure with a pre-stressed leading via according to the present invention.
Icon: 1-slope earth surface, 2-frame beam, 3-prestressed anchor cable, 4-tunnel and 41-pilot tunnel.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1, a biased tunnel structure with a prestressed force applied to a pilot tunnel comprises a tunnel 4 and a reinforced concrete frame beam 2 fixed on the surface 1 of a slope, wherein the frame beam 2 is arranged at the biased low side of the slope, a prestressed anchor cable 3 is connected between a pilot tunnel 41 of the tunnel 4 and the frame beam 2, one end of the prestressed anchor cable 3 is anchored on the frame beam 2, the other end of the prestressed anchor cable is fixed on the wall of the pilot tunnel 41, and the prestressed anchor cable 3 has a prestressed force greater than or equal to 5 tons. The prestressed anchor cable 3 comprises a steel pipe and a steel bar bundle positioned in the steel pipe, and cement paste is filled in the steel pipe.
Example 2
As shown in fig. 1, a construction method of a biased tunnel structure in which a pilot tunnel applies prestress includes the following steps:
the method comprises the following steps: drilling a hole from the ground surface 1 of the bias low-side slope to a pilot tunnel 41 to be excavated;
step two: drilling a steel perforated pipe into the borehole until the profile of the pilot tunnel 41 is formed, and constructing a reinforced concrete frame beam 2 on the side slope ground surface 1;
step three: excavating the pilot tunnel 41, after the steel perforated pipes are exposed, putting a steel bar bundle into the steel perforated pipes and extending out of the surface 1 of the side slope;
step four: and (3) firmly anchoring and fixing one end of the reinforcing bar bundle and the frame beam 2 by using high-strength reinforced concrete, applying prestress of more than or equal to 5 tons to the reinforcing bar bundle, and then injecting slurry into the steel perforated pipe for consolidation.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The bias tunnel structure applying prestress to the pilot tunnel is characterized by comprising a tunnel (4) and a frame beam (2) fixed on a slope ground surface (1), wherein a prestress anchor cable (3) is connected between a pilot tunnel (41) of the tunnel (4) and the frame beam (2).
2. A biased tunnel construction prestressed by means of a pilot tunnel according to claim 1, characterized in that the prestress of said prestressed anchorage cables (3) is greater than or equal to 5 tons.
3. The biased tunnel structure prestressed by means of pilot tunnel according to claim 1, wherein said prestressed anchorage cable (3) comprises a steel pipe and a tendon placed in said steel pipe, and said steel pipe is filled with cement slurry.
4. A biased tunnel construction prestressed by a pilot tunnel according to claim 1, characterized in that said prestressed anchorage cables (3) are anchored at one end to said frame girders (2) and at the other end to the wall of said pilot tunnel (41).
5. A biased tunnel construction with prestressed leading-hole according to any one of claims 1-4, characterized in that said frame beams (2) are reinforced concrete frame structures.
6. A biased tunnel construction with pre-stressing leading tunnels according to any of claims 1-4, characterized in that the frame beams (2) are arranged on the biased low side of the slope.
7. A method for constructing a biased tunnel structure prestressed by a pilot tunnel according to any one of claims 1 to 6, comprising the steps of:
the method comprises the following steps: drilling a hole from the bias low side slope earth surface (1) into a pilot tunnel (41) to be excavated;
step two: constructing a frame beam (2) on the side slope earth surface (1), excavating the pilot tunnel (41), placing a prestressed anchor cable (3) into the drilled hole, anchoring one end of the prestressed anchor cable (3) on the frame beam (2), applying prestress on the prestressed anchor cable (3), and then fixedly connecting the other end of the prestressed anchor cable (3) on the hole wall of the pilot tunnel (41).
8. The method of constructing a biased tunnel structure with a prestressed structure according to claim 7, wherein said second step comprises:
s21: drilling a steel perforated pipe into the borehole until the profile of the pilot tunnel (41) is formed, and constructing a frame beam (2) on the side slope ground surface (1);
s22: excavating the pilot tunnel (41), after the steel flower pipes are exposed, putting reinforcing steel bundles into the steel flower pipes and extending out of the surface (1) of the side slope;
s23: and (3) anchoring and connecting one end of the steel bar bundle with the frame beam (2), applying prestress to the steel bar bundle, and injecting slurry into the steel perforated pipe for consolidation.
9. The method of constructing a biased tunnel structure in which a pilot tunnel is prestressed according to claim 7 or 8, wherein the prestress is 5 tons or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010057586.0A CN111140248B (en) | 2020-01-17 | 2020-01-17 | Bias tunnel structure with prestress applied to pilot tunnel and construction method of bias tunnel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010057586.0A CN111140248B (en) | 2020-01-17 | 2020-01-17 | Bias tunnel structure with prestress applied to pilot tunnel and construction method of bias tunnel structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111140248A true CN111140248A (en) | 2020-05-12 |
| CN111140248B CN111140248B (en) | 2024-05-07 |
Family
ID=70525980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010057586.0A Active CN111140248B (en) | 2020-01-17 | 2020-01-17 | Bias tunnel structure with prestress applied to pilot tunnel and construction method of bias tunnel structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111140248B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065469A (en) * | 2020-09-23 | 2020-12-11 | 中铁工程装备集团有限公司 | Underground large-span space structure and construction method thereof |
| CN113605934A (en) * | 2021-07-28 | 2021-11-05 | 中铁十八局集团有限公司 | Reinforced structure for preventing tunnel uphill from slipping down and construction method thereof |
| CN114991807A (en) * | 2022-05-16 | 2022-09-02 | 中国矿业大学(北京) | Tunnel entrance and exit slope coupling double-compensation construction method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2708610A1 (en) * | 2002-02-25 | 2003-08-25 | United Lock-Block Ltd. | Arched structures and method for the construction of same |
| CN102155232A (en) * | 2011-04-02 | 2011-08-17 | 中铁二院工程集团有限责任公司 | Construction method of large-span asymmetrical double-arch railway tunnel under terrain bias pressure condition |
| CN104389628A (en) * | 2014-11-21 | 2015-03-04 | 山西省交通科学研究院 | Landslide section tunnel reinforcing device and reinforcing construction method |
| CN104775428A (en) * | 2015-04-23 | 2015-07-15 | 万军利 | Compound-type prestressed anchor cable structure and construction method thereof |
| CN106996299A (en) * | 2017-05-25 | 2017-08-01 | 中铁局集团厦门建设工程有限公司 | Control the steel floral tube pile retaining structure and its construction method of tunnel biased deformation |
| CN107143358A (en) * | 2017-06-28 | 2017-09-08 | 山东省地质矿产勘查开发局八0水文地质工程地质大队(山东省地矿工程勘察院) | Opposite-pulling anchor cable structure for controlling tunnel bias deformation and construction method thereof |
| CN109440787A (en) * | 2018-11-12 | 2019-03-08 | 中国电建集团华东勘测设计研究院有限公司 | The structure and method of engineering slope and underground chamber excavation and support simultaneously in a kind of Toppling Deformation rock mass |
| CN110258536A (en) * | 2019-06-19 | 2019-09-20 | 山东省地质矿产勘查开发局八0一水文地质工程地质大队(山东省地矿工程勘察院) | Opposite-pulling anchor cable structure for reducing bias load and construction method |
| CN110374633A (en) * | 2019-07-19 | 2019-10-25 | 中铁隧道集团二处有限公司 | The Portal Section Construction method of Tunnel Passing loose media |
| CN110453693A (en) * | 2019-03-02 | 2019-11-15 | 华北水利水电大学 | It is a kind of using adit formula to the treatment schemes of anchor |
| CN211598676U (en) * | 2020-01-17 | 2020-09-29 | 中铁二院工程集团有限责任公司 | Bias tunnel structure with pilot tunnel applying prestress |
-
2020
- 2020-01-17 CN CN202010057586.0A patent/CN111140248B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2708610A1 (en) * | 2002-02-25 | 2003-08-25 | United Lock-Block Ltd. | Arched structures and method for the construction of same |
| CN102155232A (en) * | 2011-04-02 | 2011-08-17 | 中铁二院工程集团有限责任公司 | Construction method of large-span asymmetrical double-arch railway tunnel under terrain bias pressure condition |
| CN104389628A (en) * | 2014-11-21 | 2015-03-04 | 山西省交通科学研究院 | Landslide section tunnel reinforcing device and reinforcing construction method |
| CN104775428A (en) * | 2015-04-23 | 2015-07-15 | 万军利 | Compound-type prestressed anchor cable structure and construction method thereof |
| CN106996299A (en) * | 2017-05-25 | 2017-08-01 | 中铁局集团厦门建设工程有限公司 | Control the steel floral tube pile retaining structure and its construction method of tunnel biased deformation |
| CN107143358A (en) * | 2017-06-28 | 2017-09-08 | 山东省地质矿产勘查开发局八0水文地质工程地质大队(山东省地矿工程勘察院) | Opposite-pulling anchor cable structure for controlling tunnel bias deformation and construction method thereof |
| CN109440787A (en) * | 2018-11-12 | 2019-03-08 | 中国电建集团华东勘测设计研究院有限公司 | The structure and method of engineering slope and underground chamber excavation and support simultaneously in a kind of Toppling Deformation rock mass |
| CN110453693A (en) * | 2019-03-02 | 2019-11-15 | 华北水利水电大学 | It is a kind of using adit formula to the treatment schemes of anchor |
| CN110258536A (en) * | 2019-06-19 | 2019-09-20 | 山东省地质矿产勘查开发局八0一水文地质工程地质大队(山东省地矿工程勘察院) | Opposite-pulling anchor cable structure for reducing bias load and construction method |
| CN110374633A (en) * | 2019-07-19 | 2019-10-25 | 中铁隧道集团二处有限公司 | The Portal Section Construction method of Tunnel Passing loose media |
| CN211598676U (en) * | 2020-01-17 | 2020-09-29 | 中铁二院工程集团有限责任公司 | Bias tunnel structure with pilot tunnel applying prestress |
Non-Patent Citations (1)
| Title |
|---|
| 周围;: "软弱围岩条件下的浅埋隧道施工探讨", 交通世界, no. 07, 9 April 2018 (2018-04-09) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065469A (en) * | 2020-09-23 | 2020-12-11 | 中铁工程装备集团有限公司 | Underground large-span space structure and construction method thereof |
| CN112065469B (en) * | 2020-09-23 | 2022-09-16 | 中铁工程装备集团有限公司 | Underground large-span space structure and construction method thereof |
| CN113605934A (en) * | 2021-07-28 | 2021-11-05 | 中铁十八局集团有限公司 | Reinforced structure for preventing tunnel uphill from slipping down and construction method thereof |
| CN114991807A (en) * | 2022-05-16 | 2022-09-02 | 中国矿业大学(北京) | Tunnel entrance and exit slope coupling double-compensation construction method |
| CN114991807B (en) * | 2022-05-16 | 2023-08-18 | 中国矿业大学(北京) | Tunnel entrance and exit side slope coupling double-compensation construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111140248B (en) | 2024-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105840207B (en) | Construction method for comprehensive tunnel entering structure of large-span tunnel penetrating shallow-buried bias-pressure loose accumulation body | |
| CN111140248A (en) | Bias tunnel structure applying prestress to pilot tunnel and construction method thereof | |
| CN112196582B (en) | Method for controlling severe deformation of strong-earthquake deep-buried soft rock stratum tunnel | |
| CN108412519A (en) | The slight large deformation single-track tunnel suspension device of highlands soft rock and construction method | |
| CN106498950A (en) | Anchor head is placed in the Pile-Anchor Supporting for Deep Excavation system and its implementation of pile body | |
| CN109930609A (en) | A kind of campshed composite supporting construction and its construction method for upper-soft lower-hard ground | |
| EA031926B1 (en) | Method for forming a pillar part and reinforcing adjacently constructed parallel tunnels with reinforcing rods | |
| CN106050240A (en) | Stability control method for mountainous area weak surrounding rock small-distance tunnel mid-adjacent rock | |
| CN113309132A (en) | Construction method based on steel trestle bridge anchoring pile | |
| CN211598676U (en) | Bias tunnel structure with pilot tunnel applying prestress | |
| CN110820762A (en) | Construction method of stiff-core curtain pile and retaining wall pile anchor combined supporting structure | |
| CN110210069A (en) | Tunnel advanced support System Design method and tunnel advanced support design method | |
| CN109898521A (en) | A kind of anchored pile supporting and construction method for foundation pit external corner | |
| KR20140013497A (en) | Method for constructing block type reinforced retaining wall in cut site | |
| CN206599785U (en) | A kind of campshed anchor draws cement earth pile diaphragm wall supporting construction | |
| CN108914945A (en) | A kind of deep basal pit pile for prestressed pipe, prestress anchorage cable combined supporting construction method | |
| CN114483081A (en) | Construction method of deflection-preventing structure of curved middle wall of multi-arch tunnel under terrain bias pressure | |
| CN104863613B (en) | Rocky stratum tunneling underground structure flash joist anchor draws just branch structure and construction method | |
| CN101368388B (en) | Anchor pipe skeleton support method | |
| CN105840209B (en) | Construction method for controlling deformation of anchor pile in tunnel body section | |
| CN105370306B (en) | The massif tunnel excavation construction method of vertical pre-reinforcement processing | |
| CN206942780U (en) | A kind of tunnel cross mouth advance support structure | |
| CN214497537U (en) | Double-row pile supporting system | |
| CN211395698U (en) | Stiff core curtain pile and dado stake anchor combined supporting construction | |
| CN114135315A (en) | Advanced stress release construction method for severe large-deformation tunnel |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |