CN112796782A - Buffering energy-absorbing cloth bag beam capable of resisting large deformation of soft rock in underground engineering - Google Patents
Buffering energy-absorbing cloth bag beam capable of resisting large deformation of soft rock in underground engineering Download PDFInfo
- Publication number
- CN112796782A CN112796782A CN202110279007.1A CN202110279007A CN112796782A CN 112796782 A CN112796782 A CN 112796782A CN 202110279007 A CN202110279007 A CN 202110279007A CN 112796782 A CN112796782 A CN 112796782A
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- sack
- cloth bag
- grouting
- geotechnological
- absorbing
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- 239000011435 rock Substances 0.000 title claims abstract description 44
- 239000004744 fabric Substances 0.000 title claims abstract description 33
- 230000003139 buffering effect Effects 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000004746 geotextile Substances 0.000 claims description 31
- 229920000642 polymer Polymers 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 description 9
- 238000005187 foaming Methods 0.000 description 9
- 230000035882 stress Effects 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009933 burial Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention provides a buffering energy-absorbing cloth bag beam capable of resisting large deformation of soft rock of underground engineering, which is integrally of a latticed structure and arranged between a rigid support guard plate of a supporting structure and surrounding rock. The buffering energy-absorbing cloth bag beam provided by the invention can form a multi-stage yielding-resisting support system which is coordinated with a support structure to deform, has good yielding resistance, saves filling materials by virtue of the latticed structure of the cloth bag beam, and can ensure the deformation coordination balance between the support structure and surrounding rocks.
Description
Technical Field
The invention relates to a surrounding rock supporting technology of underground engineering and tunnels, in particular to a surrounding rock primary support of a deep underground space tunnel, and specifically relates to a buffering energy-absorbing cloth bag beam for resisting large deformation of soft rock of the underground engineering.
Background
With the development of economy and society, the number, scale and depth of underground engineering construction are getting larger, and because the breadth of our country is wide and the terrain, landform and geological conditions are extremely complex, a large number of underground engineering and tunnels need to be constructed in soft rock mass. When the tunnel passes through the weak surrounding rocks, the phenomenon of large deformation of the weak surrounding rocks is often accompanied, which is particularly obvious in mountains with large burial depth. For example, the burial depth of a Japanese Whinamountain tunnel is about 400m, and after the tunnel is excavated, the vault is sunk to 43-94 cm; the burial depth of a highway tunnel in Kyohai mountain in China is about 120m, surrounding rocks are carbonaceous slate-included mudstone, and vault subsidence after excavation is accumulated to 155 cm; the Wugusling tunnel has weak surrounding rocks and high ground stress, and the vault is caused to sink to 105cm at most after the tunnel is excavated. The large deformation instability damage of the deeply buried soft rock tunnel is under the comprehensive action of various geological factors, mainly comprises various factors such as rock mass weakness, higher ground stress, rock mass joint, geological conditions, construction disturbance and the like, and the deformation does not occur immediately after excavation, but is expressed after a period of development, so that the tunnel has timeliness.
In the initial excavation construction of underground engineering and tunnel, need quick timely supporting construction of establishhing, supporting construction still possesses better stability in the support initial stage, but later stage because the ageing of surrounding rock, along with the increase of the deflection of surrounding rock and lead to the supporting construction to appear phenomenon such as crackle, destruction easily. At present, the support mode is mainly divided into passive support and active support. The active support mainly improves the mechanical property of the broken rock mass through measures such as anchor rods, advance support, grouting and the like, and fully exerts the self-bearing capacity of the surrounding rock; the passive supporting mainly utilizes a high-strength supporting means, such as increasing the steel frame model, secondary lining, spraying the concrete thickness or rigidity and the like to passively bear the deformation pressure generated by excavation, and the supporting structure can bear larger surrounding rock pressure by the method. The two support modes both follow a 'multistage yielding resistance' principle, namely, a multistage structure is adopted to resist the large deformation pressure of the surrounding rock, but in the prior art documents, no matter active support or passive support is adopted, the 'resist' is mainly adopted, no effective 'yielding resistance' structure exists, and the most important reason is that reasonable stress transmission is difficult to perform while the deformation of the surrounding rock is released in a 'multistage yielding resistance' support system.
Disclosure of Invention
Aiming at the problems in the background art, the invention aims to provide a buffering energy-absorbing cloth bag beam for resisting large deformation of soft rock of underground engineering, which can be used as an anti-structural member arranged between a rigid supporting structure and a supported surrounding rock, so that the deformation of the surrounding rock can be slowly released to the rigid supporting structure, a certain anti-yielding effect can be realized, the damage of the large deformation of the surrounding rock to the whole supporting system can be effectively prevented, when the beam is applied to primary supporting of a tunnel, the invasion limit phenomenon of the rigid supporting structure in secondary lining construction in the later period of supporting can be avoided, and the beam has extremely high application value.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a buffering energy-absorbing sack roof beam of anti soft rock large deformation of underground works, buffering energy-absorbing sack roof beam whole be latticed structure, its setting between supporting structure's rigidity backplate and country rock, buffering energy-absorbing sack roof beam includes horizontal geotechnological sack, vertical geotechnological sack and filler, and a plurality of vertical geotechnological sacks are parallel and the interval sets up, and the interval is provided with parallel horizontal geotechnological sack between a plurality of vertical geotechnological sacks, horizontal geotechnological sack is perpendicular and crossing with vertical geotechnological sack, all pour into the filler that the material is high polymer expanded material in horizontal geotechnological sack and the vertical geotechnological sack.
The transverse geotextile bags are communicated with the longitudinal geotextile bags.
The horizontal geotextile bags are provided with grouting openings A which are uniformly distributed in the length direction, the longitudinal geotextile bags are provided with grouting openings B which are uniformly distributed in the length direction, and the grouting openings A and the grouting openings B are respectively connected with grouting guide rods.
The grouting guide rod is in threaded connection with the grouting opening A.
The principle of the invention is as follows:
the high-molecular polymer foaming material is timely filled in the geotextile bag behind the rigid plate wall of the primary support structure to form a multistage yielding resistance support system which is coordinated with the support structure to deform, the geotextile bag beam filled with the high-molecular polymer foaming material has certain compressive strength after being filled and formed, the geotextile bag beam is firstly extruded when surrounding rock deforms, the geotextile bag beam can be compressed and deformed under the extrusion action to absorb partial energy, and the other part of deformed energy is transmitted to the support structure, so that the yielding resistance function of the support system is realized.
The installation method of the invention comprises the following steps:
the method is particularly suitable for primary support of easily occurring weak surrounding rocks, when a rigid support guard plate of a support structure is installed, grouting holes corresponding to grouting openings in the cloth bag beam can be reserved in the support plate, then the cloth bag beam which is not filled is placed on the outer side of the support plate in time along with installation of the support guard plate, then grouting guide pipes installed at the grouting openings of the cloth bag beam penetrate out of the grouting holes of the support plate, positioning of the cloth bag beam is achieved through the grouting guide pipes, and when the support plate is assembled, high polymer foaming materials are poured into the cloth bag beam through the grouting guide pipes, so that installation of the cloth bag beam is achieved.
The invention has the beneficial effects that:
the buffering energy-absorbing cloth bag beam provided by the invention can form a multi-stage yielding-resisting support system which is coordinated with a support structure and deforms, has good yielding resistance, saves filling materials due to the latticed structure of the cloth bag beam, can ensure the deformation coordination and balance between the support structure and surrounding rocks, and can be filled with cement paste or high polymer materials in the latticed structure of the cloth bag beam, so that the stress of the support system is more uniform; in addition, the design of the grouting opening and the grouting guide pipe is convenient for the arrangement of the cloth bag beam, and the modular assembly of the whole supporting system is facilitated.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an appearance schematic diagram of the present invention.
Fig. 3 is a schematic cross-sectional view of the present invention installed in a tunnel support.
Fig. 4 is a partial schematic view of the present invention installed in a tunnel.
In the figure, 1, a transverse geotextile bag; 2. a longitudinal geotextile bag; 3. a filler; 4. a grouting opening A; 5. grouting a guide rod; 6. a rigid support shield; 7. surrounding rocks; 8. and a grouting opening B.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the drawings in the specification, and it should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme of the invention is as follows:
as shown in fig. 1 to 4, the buffering energy-absorbing cloth bag beam for resisting large deformation of soft rock of underground engineering is of a latticed structure and is arranged between a rigid supporting plate 6 and surrounding rock 7 of a supporting structure, the buffering energy-absorbing cloth bag beam comprises a transverse geotextile bag 1, a longitudinal geotextile bag 2 and fillers 3, the longitudinal geotextile bags 2 are arranged in parallel at intervals, the parallel transverse geotextile bags 1 are arranged between the longitudinal geotextile bags 2 at intervals, the transverse geotextile bags 1 are perpendicular to and intersect with the longitudinal geotextile bags 2, and the fillers 3 made of high polymer foaming materials are filled in the transverse geotextile bags 1 and the longitudinal geotextile bags 2. Specifically, the buffering energy-absorbing cloth bag beam can be customized according to specific design parameters of underground engineering or tunnels, and the cross-sectional shapes of the transverse geotechnical cloth bag 1 and the longitudinal geotechnical cloth bag 2 can also be customized, so that the filling position is clear and materials are saved.
In one embodiment of the invention, the transverse geotextile bags 1 are communicated with the longitudinal geotextile bags 2. Specifically, the structure that the transverse geotextile bags 1 are communicated with the longitudinal geotextile bags 2 can ensure that the stress of the buffering energy-absorbing sack beams is more uniform.
The transverse geotextile bag 1 is provided with grouting openings A4 which are uniformly distributed in the length direction, the longitudinal geotextile bag 2 is provided with grouting openings B8 which are uniformly distributed in the length direction, and the grouting openings A4 and B8 are respectively connected with grouting guide rods 5. By adopting the design, firstly, the filler 3 can be more uniformly distributed in the buffering energy-absorbing cloth bag beam, and the bad phenomena of breakage, leakage and the like during filling are prevented; and secondly, the buffering energy-absorbing cloth bag beam can be installed no matter the supporting and protecting plate is installed transversely or longitudinally.
The grouting guide rod 5 is in threaded connection with a grouting opening A4. Due to the design, the grouting guide rod 5 can be detached after the buffering energy-absorbing cloth bag beam is filled and formed, and subsequent construction is not influenced.
Specifically, after a preliminary inner contour is excavated in the surrounding rock 7, a single rigid supporting and protecting plate 6 is fixed in the surrounding rock through a foot locking anchor rod, at the moment, a buffering energy-absorbing cloth bag beam is placed behind the wall of the rigid supporting and protecting plate 6 in time, the buffering energy-absorbing cloth bag beam is fixed at a reserved grouting hole on the rigid supporting and protecting plate 6 through a grouting guide rod 5, after all the rigid supporting and protecting plates 6 are installed, a high polymer foaming material is injected into the buffering energy-absorbing cloth bag beam through a grouting guide pipe 5, and at the moment, the size of a grouting filling cavity can be adjusted by adjusting the foaming ratio of the high polymer foaming material; when the cavity between the surrounding rock 7 and the supporting structure is large, the multiple of the high molecular polymer is increased, the buffer energy-absorbing cloth bag beam can be rapidly expanded to fill the cavity, and the reserved compression deformation is large; when the hollow is smaller, the foaming ratio of the high molecular polymer is reduced, the formed cloth bag beam structure is more compact, and the deformation compression amount is smaller.
According to the structural characteristics of the invention, the utility model also has the following advantages:
the method can be applied to the sections with strong water-rich surrounding rocks, can block water in time, and reduces the risk of personnel caused by unfavorable geological construction; the combination of the geotextile bag and the high polymer foaming material has waterproof and anticorrosive performances, can ensure no corrosion within decades or even hundreds of years, and ensures the stability of water prevention and water shutoff.
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 present invention.
The present invention is not described in detail in the prior art.
Claims (4)
1. The utility model provides a buffering energy-absorbing sack roof beam of anti underground works soft rock large deformation which characterized by: the whole latticed structure that is of buffering energy-absorbing sack roof beam, it sets up between supporting structure's rigidity backplate (6) and country rock (7), buffering energy-absorbing sack roof beam includes horizontal geotechnological sack (1), vertical geotechnological sack (2) and filler (3), and a plurality of vertical geotechnological sacks (2) are parallel and the interval sets up, and the interval is provided with parallel horizontal geotechnological sack (1) between a plurality of vertical geotechnological sacks (2), horizontal geotechnological sack (1) is perpendicular and crossing with vertical geotechnological sack (2), all fill filler (3) that the material is high polymer in horizontal geotechnological sack (1) and the vertical geotechnological sack ().
2. The energy-absorbing cloth bag beam capable of resisting large deformation of soft rock in underground engineering according to claim 1, which is characterized in that: the transverse geotextile bags (1) are communicated with the longitudinal geotextile bags (2).
3. The energy-absorbing cloth bag beam capable of resisting large deformation of soft rock in underground engineering according to claim 1, which is characterized in that: the geotextile bag is characterized in that grouting openings A (4) are uniformly distributed in the length direction of the transverse geotextile bag (1), grouting openings B (8) are uniformly distributed in the length direction of the longitudinal geotextile bag (2), and the grouting openings A (4) and the grouting openings B (8) are respectively connected with grouting guide rods (5).
4. The energy-absorbing cloth bag beam capable of resisting large deformation of soft rock of underground engineering according to claim 3, which is characterized in that: the grouting guide rod (5) is in threaded connection with the grouting opening A (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110279007.1A CN112796782A (en) | 2021-03-16 | 2021-03-16 | Buffering energy-absorbing cloth bag beam capable of resisting large deformation of soft rock in underground engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110279007.1A CN112796782A (en) | 2021-03-16 | 2021-03-16 | Buffering energy-absorbing cloth bag beam capable of resisting large deformation of soft rock in underground engineering |
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| Publication Number | Publication Date |
|---|---|
| CN112796782A true CN112796782A (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110279007.1A Pending CN112796782A (en) | 2021-03-16 | 2021-03-16 | Buffering energy-absorbing cloth bag beam capable of resisting large deformation of soft rock in underground engineering |
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| CN (1) | CN112796782A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01111917A (en) * | 1987-10-22 | 1989-04-28 | Asahi Chem Ind Co Ltd | Injection of setting fluid into cloth bag buried in ground |
| CN105298514A (en) * | 2015-11-26 | 2016-02-03 | 山东科技大学 | Cast-in-place continuous concrete support and installation method thereof |
| CN205260049U (en) * | 2015-11-26 | 2016-05-25 | 山东科技大学 | Deep roadway support uses novel concrete support |
| CN107676108A (en) * | 2017-10-26 | 2018-02-09 | 吕连勋 | A kind of subway tunnel high strength support structure and its construction method |
| CN107740700A (en) * | 2017-10-26 | 2018-02-27 | 吕连勋 | A kind of novel subway tunnel fill-type liner structure |
| US20190071968A1 (en) * | 2017-09-05 | 2019-03-07 | Chang'an University | Method for Deformation Control of Large-span Tunnel in Chlorite Schist Stratum |
| CN110847930A (en) * | 2019-12-09 | 2020-02-28 | 中交第一公路勘察设计研究院有限公司 | Multistage yielding-resisting supporting structure of extremely-high ground stress soft rock large-deformation tunnel and construction method |
| CN111396097A (en) * | 2020-05-19 | 2020-07-10 | 沈阳建筑大学 | Assembled multi-stage yielding support structure suitable for large-deformation complex tunnel and construction method |
| CN214464208U (en) * | 2021-03-16 | 2021-10-22 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Buffering energy-absorbing cloth bag beam capable of resisting large deformation of soft rock in underground engineering |
-
2021
- 2021-03-16 CN CN202110279007.1A patent/CN112796782A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01111917A (en) * | 1987-10-22 | 1989-04-28 | Asahi Chem Ind Co Ltd | Injection of setting fluid into cloth bag buried in ground |
| CN105298514A (en) * | 2015-11-26 | 2016-02-03 | 山东科技大学 | Cast-in-place continuous concrete support and installation method thereof |
| CN205260049U (en) * | 2015-11-26 | 2016-05-25 | 山东科技大学 | Deep roadway support uses novel concrete support |
| US20190071968A1 (en) * | 2017-09-05 | 2019-03-07 | Chang'an University | Method for Deformation Control of Large-span Tunnel in Chlorite Schist Stratum |
| CN107676108A (en) * | 2017-10-26 | 2018-02-09 | 吕连勋 | A kind of subway tunnel high strength support structure and its construction method |
| CN107740700A (en) * | 2017-10-26 | 2018-02-27 | 吕连勋 | A kind of novel subway tunnel fill-type liner structure |
| CN110847930A (en) * | 2019-12-09 | 2020-02-28 | 中交第一公路勘察设计研究院有限公司 | Multistage yielding-resisting supporting structure of extremely-high ground stress soft rock large-deformation tunnel and construction method |
| CN111396097A (en) * | 2020-05-19 | 2020-07-10 | 沈阳建筑大学 | Assembled multi-stage yielding support structure suitable for large-deformation complex tunnel and construction method |
| CN214464208U (en) * | 2021-03-16 | 2021-10-22 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Buffering energy-absorbing cloth bag beam capable of resisting large deformation of soft rock in underground engineering |
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Application publication date: 20210514 |
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