CN111485891A - Method for reversely constructing main tunnel of large-span tunnel by ramp under site-limited condition - Google Patents
Method for reversely constructing main tunnel of large-span tunnel by ramp under site-limited condition Download PDFInfo
- Publication number
- CN111485891A CN111485891A CN202010353512.1A CN202010353512A CN111485891A CN 111485891 A CN111485891 A CN 111485891A CN 202010353512 A CN202010353512 A CN 202010353512A CN 111485891 A CN111485891 A CN 111485891A
- Authority
- CN
- China
- Prior art keywords
- tunnel
- construction
- constructing
- section
- span
- 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
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000010276 construction Methods 0.000 claims abstract description 70
- 238000009412 basement excavation Methods 0.000 claims abstract description 33
- 238000012544 monitoring process Methods 0.000 claims abstract description 33
- 238000004088 simulation Methods 0.000 claims abstract description 18
- 239000011435 rock Substances 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000011378 shotcrete 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
-
- 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
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a method for reversely constructing a main tunnel of a large-span tunnel by ramps under the condition of limited site. The invention mainly comprises the following steps: constructing a ramp section; constructing a gradual change section; constructing the large span section of the tunnel close to the side of the turn road; transversely excavating the large span section of the tunnel to the other side of the large span section of the tunnel for construction; constructing a tunnel face at one end of the other side of the large span section of the tunnel in a reverse direction; determining a better transverse expanding excavation width through simulation optimization software; establishing a simulation model of reverse construction, and theoretically analyzing the key steps of reverse construction safety and construction; corresponding monitoring elements are arranged in the construction process, and the safety of reverse construction is guided according to monitoring information. The method reasonably utilizes the ramp to enter the tunnel, effectively utilizes the site in the tunnel, increases the excavation working surface in the tunnel, accelerates the tunnel excavation speed in the early stage, effectively shortens the construction period, can effectively control the deformation of surrounding rocks and the settlement of the earth surface while reasonably utilizing the site, and ensures the construction safety.
Description
Technical Field
The invention belongs to the technical field of tunnel construction, and particularly relates to a method for reversely constructing a main tunnel of a large-span tunnel by a ramp under a site-limited condition.
Background
In the tunnel construction process, how to safely enter the hole is a very critical problem. In the actual construction process of the existing tunnel, the conventional tunnel entering is excavation according to the main tunnel entering, however, the front site of the main tunnel in some tunnel sites is a weak stratum, and foundation pit excavation and box culvert construction are carried out at the back, so that the site conditions of the main tunnel entering are not met. Meanwhile, the main hole is three lanes, the section is large, and if the hole is formed from the main hole, the construction risk is much larger than that of the hole formed from the ring road of the two lanes. Furthermore, the construction progress of the main tunnel is much slower than that of the ramp, and the requirement of the existing construction period cannot be met.
Therefore, aiming at the problems, how to safely enter the hole and accelerate the construction progress under the condition of limited site is a problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to provide a method for reversely constructing a main tunnel with a large span from a ramp under the condition of limited site by aiming at the defects in the prior art.
The invention relates to a method for reversely constructing a main tunnel of a large-span tunnel by ramps under the condition of limited site, which mainly comprises the following steps:
(1) constructing a ramp section;
(2) constructing a gradual change section;
(3) constructing the large span section of the tunnel close to the side of the turn road;
(4) transversely excavating the large span section of the tunnel to the other side of the large span section of the tunnel for construction;
(5) constructing a tunnel face at one end of the other side of the large span section of the tunnel in a reverse direction;
(6) determining a better transverse expanding excavation width through simulation optimization software;
(7) establishing a simulation model of reverse construction, and theoretically analyzing the key steps of reverse construction safety and construction;
(8) corresponding monitoring elements are arranged in the construction process, and the safety of reverse construction is guided according to monitoring information.
Specifically, the ramp section construction in the step (1) is carried out according to an upper step and a lower step, the length of the upper step and the length of the lower step meet the requirements of safety and slag discharge, the upper step advances by 5-10 m, the footage is 2-4 m, and adjustment is carried out according to the stable conditions and the monitoring conditions of surrounding rocks.
Specifically, the construction of the transition section in the step (2) is to construct the transition section by an upper step method and a lower step method of a ramp section, and the length of the transition section is 5 m; in the gradual change section, an upper step method and a lower step method are adopted to respectively dig the gradual change section to an upper step and a lower step of the large span section of the tunnel, which are close to the side of the turn road; wherein, the upper step advances 5-10 m, footage 2-4 m, and makes adjustment according to the stable condition and monitoring condition of surrounding rock.
Specifically, in the step (3), after 50m of excavation is performed on the upper step and the lower step of the large span section of the tunnel, which are close to the side of the turn road, the upper step of the other side of the large span section of the transversely excavated tunnel in the step (4) is started, and the transverse excavation width is 3m, so that the construction safety is ensured, and the method can be properly adjusted according to the monitoring data and the simulation result.
Specifically, the step (5) is that after the transverse excavation is finished, an upper step of a tunnel face at one end of the other side of the large span section of the tunnel is reversely constructed, and after the upper step at the side is constructed for 15m, a lower step at the side is constructed; wherein, the upper step advances 5-10 m, footage 2-4 m, and makes adjustment according to the stable condition and monitoring condition of surrounding rock.
Specifically, the step (6) is to establish simulation models with different transverse expanding excavation widths, analyze the maximum deformation change rule of the tunnel under different expanding excavation widths, and determine the better transverse expanding excavation width by combining the conditions of construction machinery equipment.
Specifically, the step (7) is to establish a three-dimensional simulation model of reverse construction, analyze deformation stress conditions under each construction step, and theoretically analyze the safety of the construction steps.
Specifically, step (8) is that corresponding monitoring elements are arranged in the construction, including surrounding rock pressure, I-steel stress, spray layer stress and displacement monitoring, and safety of reverse construction is guided according to monitoring information.
Compared with the traditional construction method, the method of the invention solves the problem that the main tunnel can not enter the tunnel smoothly due to the restriction of site limitation; moreover, one half is excavated in the forward direction, the other half is excavated in the reverse direction, ramp entering is reasonably utilized, the site in the tunnel is effectively utilized, an excavation working surface is added in the tunnel, the tunnel early-stage excavation speed is accelerated, the construction period is effectively shortened, the deformation of surrounding rocks and the settlement of the earth surface can be effectively controlled while the site is reasonably utilized, and the construction safety is guaranteed; the method for determining the transverse expanding excavation width can also provide wide reference for similar tunnel construction.
Drawings
FIG. 1 is a block diagram of a reverse construction process of the method of the present invention.
FIG. 2 is a three-dimensional schematic view of the reverse construction of the large span transverse excavation of the tunnel in the method of the present invention; in fig. 2, 1 denotes an upper step on the right side; 2 denotes a right lower step; and 3, indicating an upper step on the left side, and transversely excavating the other side.
FIG. 3 is a schematic plan view of the construction of two steps on the ramp section by the method of the present invention.
Fig. 4 is a schematic plan view of the construction of a transition section of the method of the present invention.
FIG. 5 is a schematic plan view of the upper and lower steps of the tunnel large span section near the ramp side constructed by the ramp section according to the method of the present invention.
Fig. 6 is a schematic plan view of the construction from the transverse excavation of the large span section of the tunnel to the other side of the large span section of the tunnel according to the method of the present invention.
FIG. 7 is a schematic plan view of a tunnel face at the other end of the large span of the tunnel constructed by the method of the present invention.
FIG. 8 is a graph showing the maximum displacement curves of the tunnel with different lateral excavation widths during the reverse construction of the large span section of the tunnel.
FIG. 9 is a displacement cloud chart generated by reverse construction of a large span section of a tunnel according to the method of the invention.
FIG. 10 is a diagram of the maximum main stress of the large span reverse construction vault of the tunnel according to the method of the present invention.
Fig. 11 is a graph of the stress monitoring result of the large-span spray layer (sprayed concrete) of the tunnel by the method of the invention.
FIG. 12 is a diagram of the results of monitoring the convergence of the large-span periphery of the tunnel according to the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings and specific examples, but the present invention is not limited thereto.
Referring to fig. 1 and 2, a method for reversely constructing a main tunnel of a large-span tunnel from a ramp under a site-limited condition in an embodiment of the present invention includes the following steps:
(1) constructing a ramp section;
(2) constructing a gradual change section;
(3) constructing the large span section of the tunnel close to the side of the turn road;
(4) transversely excavating the large span section of the tunnel to the other side of the large span section of the tunnel for construction;
(5) constructing a tunnel face at one end of the other side of the large span section of the tunnel in a reverse direction;
(6) determining a better transverse expanding excavation width through simulation optimization software;
(7) establishing a simulation model of reverse construction, and theoretically analyzing the key steps of reverse construction safety and construction;
(8) corresponding monitoring elements are arranged in the construction process, and the safety of reverse construction is guided according to monitoring information.
The specific construction process of this embodiment is, in step (1), the ramp section construction adopts two upper and lower step methods, as shown in fig. 3, the length of upper and lower step will satisfy the safety and slag tapping demand, the upper step advances 5 ~ 10m, footage 2 ~ 4m to make the adjustment according to surrounding rock stable condition and monitoring condition.
And constructing the ramp section to a gradual change section by an upper step and a lower step method, wherein the length of the gradual change section is 5m, as shown in figure 4. And in the gradual change section, an upper step method and a lower step method are adopted to respectively dig the gradual change section to an upper step and a lower step of the large span section of the tunnel, which are close to the sides of the turn tracks.
And continuously excavating the upper step and the lower step of the large span section of the tunnel, which are close to the side of the turnways, for about 50m, as shown in fig. 5 and 6 (in the drawings, SD1 represents the 1 section of the tunnel, SD2 represents the 2 section of the tunnel), starting to transversely excavate the upper step on the other side of the large span section, wherein the transverse excavation width is preferably 3m, so that the construction safety is ensured, and the transverse excavation width can be properly adjusted according to monitoring data and simulation results.
After the transverse excavation is completed, the side upper step is constructed reversely, and as shown in fig. 7, after the side upper step is constructed for 15m, the side lower step is constructed.
Finite element software is applied to establish simulation models with different transverse expanding excavation widths, as shown in fig. 8, the maximum deformation change rule of the tunnel under the different expanding excavation widths is analyzed, and the better transverse expanding excavation width is determined by combining the conditions of construction machinery equipment, and in the embodiment, the better transverse expanding excavation width is 3 m.
Finite element software is applied to establish a three-dimensional simulation model of reverse construction, deformation stress conditions under each construction step are analyzed, the safety of the three-dimensional simulation model is analyzed theoretically according to a deformation result shown in figure 9 and a stress result shown in figure 10, and the deformation and the stress in the embodiment meet the safety requirement.
Corresponding monitoring elements are arranged in construction, wherein the monitoring elements comprise surrounding rock pressure, I-steel stress, spray layer stress, displacement monitoring and the like, the I-steel stress monitoring is shown in fig. 11, and the vault displacement monitoring is shown in fig. 12, and the safety of reverse construction is guided according to monitoring information.
Claims (8)
1. A method for reversely constructing a main tunnel of a large-span tunnel by a ramp under the condition of limited site is characterized by comprising the following steps:
(1) constructing a ramp section;
(2) constructing a gradual change section;
(3) constructing the large span section of the tunnel close to the side of the turn road;
(4) transversely excavating the large span section of the tunnel to the other side of the large span section of the tunnel for construction;
(5) constructing a tunnel face at one end of the other side of the large span section of the tunnel in a reverse direction;
(6) determining a better transverse expanding excavation width through simulation optimization software;
(7) establishing a simulation model of reverse construction, and theoretically analyzing the key steps of reverse construction safety and construction;
(8) corresponding monitoring elements are arranged in the construction process, and the safety of reverse construction is guided according to monitoring information.
2. The method for reversely constructing the main tunnel of the large-span tunnel by the ramp under the site-limited condition according to claim 1, wherein: and (2) constructing the ramp section according to an upper step and a lower step, wherein the length of the upper step and the length of the lower step meet the requirements of safety and slag discharge, the upper step advances by 5-10 m, the footage is 2-4 m, and the ramp section is adjusted according to the stable conditions and the monitoring conditions of surrounding rocks.
3. The method for reversely constructing the main tunnel of the large-span tunnel by the ramp under the site-limited condition according to claim 2, wherein: constructing the transition section in the step (2), namely constructing the transition section by an upper step method and a lower step method of a ramp section, wherein the length of the transition section is 5 m; in the gradual change section, an upper step method and a lower step method are adopted to respectively dig the gradual change section to an upper step and a lower step of the large span section of the tunnel, which are close to the side of the turn road; wherein, the upper step advances 5-10 m, footage 2-4 m, and makes adjustment according to the stable condition and monitoring condition of surrounding rock.
4. The method for reversely constructing the main tunnel of the large-span tunnel by the ramp under the site-limited condition according to claim 3, wherein: in the step (3), after 50m of excavation is carried out on the upper step and the lower step of the large span section of the tunnel, which are close to the sides of the turnways, the upper step of the other side of the large span section of the transversely excavated tunnel in the step (4) is started, and the transverse excavation width is 3m, so that the construction safety is ensured, and the appropriate adjustment can be carried out according to the monitoring data and the simulation result.
5. The method for reversely constructing the main tunnel of the large-span tunnel by the ramp under the site-limited condition according to claim 4, wherein: step (5), after the transverse excavation is finished, reversely constructing an upper step on the tunnel face at one end of the other side of the large span section of the tunnel, and constructing a lower step on the side after the upper step on the side is constructed for 15 m; wherein, the upper step advances 5-10 m, footage 2-4 m, and makes adjustment according to the stable condition and monitoring condition of surrounding rock.
6. The method for reversely constructing the main tunnel of the large-span tunnel by the ramp under the site-limited condition according to claim 5, wherein: and (6) establishing simulation models with different transverse expanding excavation widths, analyzing the maximum deformation change rule of the tunnel under the different expanding excavation widths, and determining the better transverse expanding excavation width by combining the condition of construction machinery equipment.
7. The method for reversely constructing the main tunnel of the large-span tunnel by the ramp under the site-limited condition according to claim 6, wherein: and (7) establishing a three-dimensional simulation model of reverse construction, analyzing deformation stress conditions in each construction step, and theoretically analyzing the safety of the construction steps.
8. The method for reversely constructing the main tunnel of the large-span tunnel by the ramp under the site-limited condition according to claim 7, wherein: and (8) arranging corresponding monitoring elements in construction, wherein the monitoring elements comprise surrounding rock pressure, I-steel stress, spray layer stress and displacement monitoring, and guiding the safety of reverse construction according to monitoring information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010353512.1A CN111485891A (en) | 2020-04-29 | 2020-04-29 | Method for reversely constructing main tunnel of large-span tunnel by ramp under site-limited condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010353512.1A CN111485891A (en) | 2020-04-29 | 2020-04-29 | Method for reversely constructing main tunnel of large-span tunnel by ramp under site-limited condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111485891A true CN111485891A (en) | 2020-08-04 |
Family
ID=71813707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010353512.1A Pending CN111485891A (en) | 2020-04-29 | 2020-04-29 | Method for reversely constructing main tunnel of large-span tunnel by ramp under site-limited condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111485891A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08151890A (en) * | 1994-11-28 | 1996-06-11 | Hazama Gumi Ltd | Two-stage shield machine |
| CN106869944B (en) * | 2017-02-14 | 2018-08-31 | 中国电建集团华东勘测设计研究院有限公司 | The extra small clear-distance tunnel construction method in underground interchange intersection under complex environment |
| CN109057807A (en) * | 2018-09-28 | 2018-12-21 | 北京市市政三建设工程有限责任公司 | A kind of gradual change Large span tunnel reversely digs method |
| CN110195598A (en) * | 2019-06-14 | 2019-09-03 | 浙江交工路桥建设有限公司 | A kind of highway tunnel construction integrated control method |
-
2020
- 2020-04-29 CN CN202010353512.1A patent/CN111485891A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08151890A (en) * | 1994-11-28 | 1996-06-11 | Hazama Gumi Ltd | Two-stage shield machine |
| CN106869944B (en) * | 2017-02-14 | 2018-08-31 | 中国电建集团华东勘测设计研究院有限公司 | The extra small clear-distance tunnel construction method in underground interchange intersection under complex environment |
| CN109057807A (en) * | 2018-09-28 | 2018-12-21 | 北京市市政三建设工程有限责任公司 | A kind of gradual change Large span tunnel reversely digs method |
| CN110195598A (en) * | 2019-06-14 | 2019-09-03 | 浙江交工路桥建设有限公司 | A kind of highway tunnel construction integrated control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104314578B (en) | Construction method for continuous construction by using shield construction machine and matched station thereof | |
| CN108266193A (en) | IVth, the construction method in V grade of weak surrounding rock tunneling boring tunnel | |
| CN112943364A (en) | Dynamo and Revit based long tunnel parametric modeling method | |
| CN110700841B (en) | Double-side-wall guide pit type excavation method for tunnel excavation | |
| CN110259490B (en) | Subway underground excavation station construction method | |
| CN110924952B (en) | Construction method for three-step seven-step normal medium rock pillar method conversion of super-large section tunnel | |
| CN104806251A (en) | Subsidiary inverted excavation construction method for urban subway station under complex environment | |
| CN109958445A (en) | The frame construction method in Large Underground space is buried for an ultra shallow | |
| CN110195598A (en) | A kind of highway tunnel construction integrated control method | |
| Han et al. | Construction technologies and mechanical effects of the pipe-jacking crossing anchor-cable group in soft stratum | |
| CN103899318A (en) | Medium ground tunnel milling excavating and mating mechanized construction method | |
| CN110552704B (en) | Construction method for underground excavation of water-rich sandy gravel stratum crossover section through urban main road | |
| CN105927234A (en) | Construction method for reinforcing and excavating horizontal tunnel by multi-vertical-shaft freezing method | |
| CN103422867B (en) | A kind of based on digitized tunnel construction perturbation control method | |
| CN116663131B (en) | Tunnel intelligent design system and method based on 3DE platform | |
| CN204457789U (en) | A kind of stake arch wall supports the subway station digging large diameter shield tunnel and build | |
| CN106021725A (en) | Primary support opportunity selection method based on simulation analysis of tunnel excavation numerical value | |
| CN111485891A (en) | Method for reversely constructing main tunnel of large-span tunnel by ramp under site-limited condition | |
| CN107313430A (en) | The deep big foundation pit subregion construction method of three face Nearby Structures | |
| CN105155546B (en) | A kind of construction method of prebored hole cubic meter of stone mechanical equivalent of light excavation | |
| CN111706352A (en) | Method for entering arch into hole by using bias tunnel arch sleeve | |
| CN115293535A (en) | Multi-pile construction progress and quality management method based on BIM technology | |
| CN109594995A (en) | A kind of Support System in Soft Rock Tunnels micro-disturbance machinery branch driving engineering method | |
| CN107269283A (en) | A kind of big cross section tunneling subway station and running tunnel insertion construction method | |
| CN114607389A (en) | Improved double-side-wall pilot tunnel construction method for urban super-large-section shallow-buried station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zheng Hongli Inventor after: Pang Tuo Inventor after: Hao Deliang Inventor after: Li Zhongliang Inventor after: Su Guangming Inventor after: Zhou Jian Inventor after: Liu Zeshuai Inventor before: Zheng Hongli Inventor before: Pang Tuo Inventor before: Hao Deliang Inventor before: Li Zhongliang Inventor before: Su Guangming Inventor before: Zhou Jian Inventor before: Liu Zeshuai |
|
| CB03 | Change of inventor or designer information | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200804 |
|
| WD01 | Invention patent application deemed withdrawn after publication |