CN112343603A - Comprehensive construction method suitable for tunneling of shield tunnel with ultra-large section - Google Patents
Comprehensive construction method suitable for tunneling of shield tunnel with ultra-large section Download PDFInfo
- Publication number
- CN112343603A CN112343603A CN202011064990.7A CN202011064990A CN112343603A CN 112343603 A CN112343603 A CN 112343603A CN 202011064990 A CN202011064990 A CN 202011064990A CN 112343603 A CN112343603 A CN 112343603A
- Authority
- CN
- China
- Prior art keywords
- section
- shield
- tunneling
- backfill
- replacement
- 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 42
- 230000005641 tunneling Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000005065 mining Methods 0.000 claims abstract description 12
- 238000009412 basement excavation Methods 0.000 claims description 8
- 239000011083 cement mortar Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000009969 flowable effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002351 wastewater 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
- 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
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- 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
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a comprehensive construction method suitable for tunneling a shield tunnel with an oversized section, which comprises the following steps: adopting a mining method to construct and form an outer contour section tunneled by the shield tunneling machine; gradually removing the temporary support applied in the mine construction in the section by taking the fixed length distance as a node in the section, and synchronously applying backfill material for replacement and backfill when removing the temporary support until the space of the whole section is completely replaced and backfilled; and (3) tunneling and assembling a segment structure in the backfill material after replacement and backfilling by adopting a shield tunneling machine to form a permanent functional space. According to the construction method, the backfill material is used for replacement and backfill, then the oversized-section shield tunnel is tunneled, the construction difficulty and risk that the shield machine directly passes through a local high-strength hard rock section are reduced, the problem that backfill construction is difficult to carry out in a tunnel excavated by a mine method is solved, in addition, the backfill material can provide counter force for segment assembly, a waterproof sealing gasket is compressed, the leakage risk is reduced, and meanwhile, the risk of segment dislocation in the air pushing process of the shield machine is reduced.
Description
Technical Field
The invention relates to the technical field of tunnel engineering, in particular to a comprehensive construction method suitable for tunneling a shield tunnel with an oversized section.
Background
For weak stratum, it is suitable for mechanical construction, i.e. adopting shield scheme, which is the commonly used construction method at present. And for the condition that the whole tunnel line is positioned in a rock stratum with better geological conditions, the traditional mining method is adopted for construction, namely a method for performing preliminary bracing and deslagging after blasting.
With the development of infrastructure construction, the geological problems faced by tunnel construction are more and more, the problems are more and more new, the geological difference of the same tunnel is more and more, and the situation that part of road sections are soft stratums and part of road sections are hard rocks is often caused.
In the past engineering experience, when the small-diameter shield construction is met, the problem of directly tunneling hard rock by adopting the shield is relatively small. However, for a tunnel with an oversized section, namely the diameter of the shield exceeds 15 meters, the section of the shield is 6 times of the excavation area of a small shield of a conventional subway, the problem that the shield is difficult to excavate, the cutter is seriously abraded, the construction efficiency is low and the like when the shield directly excavates in hard rock is solved, even the shield cannot adapt to a hard rock section with extremely high strength, and further equipment of the shield cannot be paralyzed and cannot work.
In the small-section shield construction, when the shield machine tunnels in the hard rock stratum of a local road section, in order to reduce the construction difficulty and risk, a scheme that the outer contour section of the shield machine is excavated in a mine and then the shield machine is pushed to pass through in the air is adopted sometimes.
For the shield tunnel with the ultra-large section, if a scheme of small shield mine and air pushing is adopted, the risks of large excavation span of a mining method, difficulty in dismantling a temporary support in the mining method, serious slab staggering of a shield air pushing section pipe segment, large later-stage leakage risk and the like can be met.
Disclosure of Invention
The invention aims to provide a comprehensive construction method suitable for tunneling an oversized section shield tunnel aiming at the existing technical current situation, the construction method utilizes backfill materials to replace and backfill the oversized section shield tunnel, reduces the construction difficulty and risk of the shield tunneling machine directly passing through a local high-strength hard rock section, solves the problem that backfill construction is difficult to carry out in a tunnel excavated by a mine method, and in addition, the backfill materials can provide counter force for segment assembly, compress a waterproof sealing gasket, reduce leakage risk and reduce the risk of segment dislocation in the idle pushing process of the shield tunneling machine.
In order to achieve the purpose, the invention adopts the following technical scheme:
a comprehensive construction method suitable for tunneling of a shield tunnel with an oversized section comprises the following steps:
s1, forming an outer contour section tunneled by the shield tunneling machine by adopting a mining method;
s2, gradually removing the temporary support applied by the mine construction method in the section by taking a fixed length distance as a node in the outer contour section tunneled by the shield tunneling machine, synchronously applying backfill material for replacement and backfilling when removing the temporary support, and performing a temporary support removing process and a replacement and backfilling process in the next node after the backfill material applied in the previous node reaches the strength until the space of the whole section is completely replaced and backfilled;
and S3, tunneling and assembling a segment structure in the backfill material after replacement and backfilling by using a shield tunneling machine to form a permanent functional space and apply a tunnel internal structure in the permanent functional space.
Further, in step S2, the length of each node is 3-5 m.
Further, in step S2, the temporary brace dismantling process in each node is performed in a segmented manner from bottom to top, and the replacement backfill process is performed step by step along with each segment of the temporary brace dismantling process.
Further, in step S2, the backfill material is a fluid cement mortar.
Further, in step S3, the excavation diameter of the shield machine is smaller than the diameter of the cross section formed by the mining method.
The invention has the beneficial effects that:
1. according to the construction method, the backfill material is used for replacement and backfill, and then the oversized-section shield tunnel is tunneled, so that the construction difficulty and risk that the shield machine directly passes through a local high-strength hard rock section are reduced, the problem that backfill construction is difficult to carry out in a tunnel excavated by a mine method is solved, in addition, the backfill material can provide counter force for segment assembly, a waterproof sealing gasket is compressed, the leakage risk is reduced, and meanwhile, the risk of segment dislocation in the air pushing process of the shield machine is reduced; 2. the invention is suitable for tunneling of the tunnel with the ultra-large section, and the application range of the shield machine construction scheme is expanded.
Drawings
FIG. 1 is a schematic structural diagram of a cross-section formed in step S1 according to the present invention;
fig. 2 is a schematic structural diagram of the present invention after segment replacement backfill in step S2.
Description of the labeling: 1. the method comprises the steps of (1) tunneling outer contour section of the shield tunneling machine, (2) temporary support, (3) system anchor rod, and (4) advance support.
Detailed Description
The invention will be further explained with reference to the drawings.
A comprehensive construction method suitable for tunneling of a shield tunnel with an oversized section comprises the following steps:
and S1, forming the outer contour section 1 tunneled by the shield tunneling machine by adopting the mining method construction, wherein the advance support 4, the system anchor rod 3, the temporary support 2 and the sprayed concrete are required to be applied during the mining method construction as shown in figure 1. In order to solve the safety problem between different excavation procedures in the ultra-large section mine method construction, an excavation method adopting a double-side-wall pilot tunnel and a temporary support 2, namely a 5-step and 11-step excavation method, is selected.
And S2, before the shield tunneling machine tunnels, all temporary supports 2 in the section need to be removed, and the secondary lining is not implemented at the moment. In order to solve the problem that the primary support is difficult to ensure the structural stability requirement of a tunnel excavated by a mining method, namely, the structural safety is ensured, the temporary support 2 applied in the mining method construction in the section is gradually removed by taking a fixed length distance as a node in the outer contour section 1 excavated by the shield tunneling machine, backfill is synchronously applied to replace and backfill when the temporary support 2 is removed, after the backfill applied in the previous node reaches the strength, the temporary support 2 removing process and the replacement and backfill process in the next node are carried out until the space of the whole section is completely replaced and backfilled, and the section after replacement and backfill is shown in figure 2.
The length of each node is 3-5m, the dismantling process of the temporary support 2 in each node is performed in a segmented mode from bottom to top, and the replacement backfilling process is performed step by step along with the dismantling process of each segment of the temporary support 2. The backfill is flowable cement mortar or other flowable materials.
S3, tunneling and assembling a segment structure in the backfill material after replacement and backfilling by using a shield tunneling machine to form a permanent functional space and apply a tunnel internal structure inside the permanent functional space, wherein the tunnel internal structure comprises but is not limited to an upper lane, a lower lane, a discharge flue, a stair arranged at intervals, a smoke pipe, a pipeline space, a waste water pump room and a cable well. Preferably, the excavation diameter of the shield machine is smaller than the diameter of a cross section formed by the mine method construction, and the difference between the diameters is generally controlled to be about 0.5 m.
Compared with the scheme that the subway small shield is directly pushed in the air after being excavated by adopting a mining method, the method has the following advantages and innovations:
1. the backfill material is used for replacement and backfill, and then the ultra-large section shield tunnel is tunneled, so that the construction difficulty and risk of the shield machine directly passing through a local high-strength hard rock section are reduced;
2. the fluidity cement mortar or other fluidity materials are backfilled, so that the safety of the oversized section mine method tunnel is improved;
3. the flowable cement mortar is used as backfill, so that a backfill scheme can be smoothly implemented in a narrow space with 2-density temporary supports;
4. the section is larger than that of the subway;
5. the backfill can provide counter force for segment assembly, compress the waterproof sealing gasket, reduce leakage risk and reduce the risk of segment dislocation in the air thrust process of the shield tunneling machine;
6. the problem of the little shield of subway empty push backfill pea gravel fill not full, even unable construction is solved.
The invention enlarges the application range of the shield construction scheme with higher mechanization degree.
It should be understood that the above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the invention, therefore, all equivalent changes in the principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A comprehensive construction method suitable for tunneling of a shield tunnel with an oversized section is characterized by comprising the following steps: the method comprises the following steps:
s1, forming an outer contour section tunneled by the shield tunneling machine by adopting a mining method;
s2, gradually removing the temporary support applied by the mine construction method in the section by taking a fixed length distance as a node in the outer contour section tunneled by the shield tunneling machine, synchronously applying backfill material for replacement and backfilling when removing the temporary support, and performing a temporary support removing process and a replacement and backfilling process in the next node after the backfill material applied in the previous node reaches the strength until the space of the whole section is completely replaced and backfilled;
and S3, tunneling and assembling a segment structure in the backfill material after replacement and backfilling by using a shield tunneling machine to form a permanent functional space and apply a tunnel internal structure in the permanent functional space.
2. The comprehensive construction method suitable for extra-large section shield tunneling according to claim 1, characterized in that: in step S2, each node has a length of 3-5 m.
3. The comprehensive construction method suitable for extra-large section tunneling according to claim 2, characterized in that: in step S2, the temporary brace dismantling process in each node is performed in segments from bottom to top, and the replacement backfilling process is performed step by step along with each segment of the temporary brace dismantling process.
4. A comprehensive construction method suitable for ultra-large section shield tunneling according to any one of claims 1 to 3, characterized in that: in step S2, the backfill material is a fluid cement mortar.
5. The comprehensive construction method suitable for extra-large section shield tunneling according to claim 1, characterized in that: in step S3, the excavation diameter of the shield machine is smaller than the diameter of the cross section formed by the mine method construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011064990.7A CN112343603A (en) | 2020-09-30 | 2020-09-30 | Comprehensive construction method suitable for tunneling of shield tunnel with ultra-large section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011064990.7A CN112343603A (en) | 2020-09-30 | 2020-09-30 | Comprehensive construction method suitable for tunneling of shield tunnel with ultra-large section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112343603A true CN112343603A (en) | 2021-02-09 |
Family
ID=74360537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011064990.7A Pending CN112343603A (en) | 2020-09-30 | 2020-09-30 | Comprehensive construction method suitable for tunneling of shield tunnel with ultra-large section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112343603A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005016009A (en) * | 2003-06-23 | 2005-01-20 | Ohbayashi Corp | Excavated soil recycling method in shield tunneling method |
| CN105201518A (en) * | 2015-10-13 | 2015-12-30 | 铁道第三勘察设计院集团有限公司 | Method for receiving and disassembly of large-diameter slurry balance shield in hole |
| CN108775244A (en) * | 2018-05-28 | 2018-11-09 | 中铁十六局集团有限公司 | A kind of Mining Method receives shield machine and shield sky pushes away construction method |
| CN110159309A (en) * | 2019-05-27 | 2019-08-23 | 中国水利水电第八工程局有限公司 | A kind of construction method using foam concrete backfill Tunneling by mining method |
| CN110410144A (en) * | 2019-07-18 | 2019-11-05 | 中交第二公路勘察设计研究院有限公司 | A kind of waterproof/drainage structure of shield tunnel |
| CN110878696A (en) * | 2019-12-11 | 2020-03-13 | 中铁二十局集团第四工程有限公司 | Method for reinforcing surrounding rock of tunnel section at junction of upper soft and lower hard stratum shield method and mine method |
-
2020
- 2020-09-30 CN CN202011064990.7A patent/CN112343603A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005016009A (en) * | 2003-06-23 | 2005-01-20 | Ohbayashi Corp | Excavated soil recycling method in shield tunneling method |
| CN105201518A (en) * | 2015-10-13 | 2015-12-30 | 铁道第三勘察设计院集团有限公司 | Method for receiving and disassembly of large-diameter slurry balance shield in hole |
| CN108775244A (en) * | 2018-05-28 | 2018-11-09 | 中铁十六局集团有限公司 | A kind of Mining Method receives shield machine and shield sky pushes away construction method |
| CN110159309A (en) * | 2019-05-27 | 2019-08-23 | 中国水利水电第八工程局有限公司 | A kind of construction method using foam concrete backfill Tunneling by mining method |
| CN110410144A (en) * | 2019-07-18 | 2019-11-05 | 中交第二公路勘察设计研究院有限公司 | A kind of waterproof/drainage structure of shield tunnel |
| CN110878696A (en) * | 2019-12-11 | 2020-03-13 | 中铁二十局集团第四工程有限公司 | Method for reinforcing surrounding rock of tunnel section at junction of upper soft and lower hard stratum shield method and mine method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110985025B (en) | Method for reconstructing shield tunnel to carry out mine construction | |
| CN109356596B (en) | Method for launching and receiving shield tunneling machine by utilizing recyclable underground continuous wall and steel sleeve | |
| CN110821503B (en) | Construction method for main body of ultra-deep shield section air shaft after tunnel advance | |
| CN109209392B (en) | Full-ring excavation method suitable for IV-V-grade surrounding rock of large-section tunnel | |
| CN109372518B (en) | Reverse excavation construction method for tunnel abrupt-change section | |
| CN109736827B (en) | Method for excavating urban subway hard rock stratum communication channel by high-pressure gas expansion fracturing | |
| WO2022083096A1 (en) | Tunnel excavation method for upper-soft and lower-hard stratum | |
| Hou et al. | Excavation failure due to pipeline damage during shallow tunnelling in soft ground | |
| CN103485790A (en) | Shallow tunneling method for pipe-proof-supporting structure combined system | |
| CN105332710A (en) | Construction method suitable for up-down overlapped tunnel with small clear space and long distance under weak geological condition | |
| CN110259490B (en) | Subway underground excavation station construction method | |
| CN112160755B (en) | Subway line construction method for expanding excavation station after shield tunnel construction in advance | |
| CN113803074A (en) | Construction method of tunnel structure for artificial and mechanical combined obstacle removal of water-rich sand layer | |
| CN113374931B (en) | Non-excavation capacity-expansion method for old urban pipeline | |
| CN108915702B (en) | Shield receiving method in circular small-section tunnel | |
| CN113062750A (en) | Construction method of tunnel structure with underground structure uplift pile penetrating downwards | |
| CN113513322A (en) | Soil pressure balance jacking construction method for water-rich shallow-buried large-section rectangular jacking pipe | |
| CN112343603A (en) | Comprehensive construction method suitable for tunneling of shield tunnel with ultra-large section | |
| CN114704272B (en) | Construction method of underground tunnel with first building and then digging | |
| CN110985002A (en) | Tunnel construction method for horizontal semi-soft semi-hard section stratum | |
| CN113187498B (en) | TBM tunnel collapsed cavity backfilling and advanced pipe shed construction method | |
| CN106640098B (en) | Subway tunnel shield construction method | |
| CN214273663U (en) | Weak surrounding rock tunnel geological disaster punishment structure | |
| CN214997645U (en) | Be applicable to subway station goes out inlet pipe curtain construction pipe curtain structure | |
| CN113931640A (en) | Construction method for empty pushing and starting of shield in mine 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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210209 |