CN214464208U - 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
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- CN214464208U CN214464208U CN202120538853.6U CN202120538853U CN214464208U CN 214464208 U CN214464208 U CN 214464208U CN 202120538853 U CN202120538853 U CN 202120538853U CN 214464208 U CN214464208 U CN 214464208U
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Abstract
The utility model provides a buffering energy-absorbing sack roof beam of anti soft rock of underground works large deformation, buffering energy-absorbing sack roof beam whole be latticed structure, its setting is between supporting structure's rigid support backplate and country rock, buffering energy-absorbing sack roof beam is including horizontal geotechnological sack, vertical geotechnological sack and filler, all pour into the filler that the material is high polymer expanded material in horizontal geotechnological sack and the vertical geotechnological sack. The utility model provides a buffering energy-absorbing sack roof beam can form the multistage antitorque system of letting that harmony warp with supporting construction, has good ability of letting resistance, and the latticed structure of sack roof beam both saves packing material, can guarantee again that the deformation between supporting construction and the country rock is harmonious balanced.
Description
Technical Field
The utility model relates to a technique is strutted to the country rock in underground works and tunnel, especially relates to the country rock preliminary bracing in dark underground space tunnel, specifically is a buffering energy-absorbing sack roof beam of anti underground works soft rock large deformation.
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
The problem to exist among the background art, the utility model aims at providing a buffering energy-absorbing sack roof beam of anti underground works soft rock large deformation, it can let anti-structure setting between rigid support structure and the country rock of being strutted as one kind, thereby make the country rock deformation can comparatively slow release to rigid support structure on, realize certain anti effect of letting, can effectively defend the destruction of country rock large deformation to whole supporting system, when being applied to tunnel preliminary bracing, can avoid rigid support structure to appear when strutting the construction of later stage second lining and invade the limit phenomenon, high using value has.
In order to achieve the above purpose, the utility model 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 utility model 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 utility model discloses an installation method:
the utility model discloses specially adapted appears weak country rock's preliminary bracing easily, when the backplate is propped up to installation supporting construction's rigidity, can reserve on the supporting plate and sack roof beam the corresponding slip casting hole of slip casting mouth, then in time arrange the supporting plate outside with the sack roof beam of not packing along with the installation of backplate, the slip casting pipe that will install at sack roof beam slip casting mouth this moment is worn out from the slip casting hole of supporting plate again, utilize the slip casting pipe to realize the location of sack roof beam, assemble the completion when the supporting plate, fill high polymer foam through the slip casting pipe in to the sack roof beam, the installation of sack roof beam has been realized promptly.
The utility model has the advantages that:
the buffering energy-absorbing cloth bag beam provided by the utility model can form a multi-stage yielding support system which is coordinated and deformed with a support structure, has good yielding capacity, saves filling materials due to the latticed structure of the cloth bag beam, can ensure the coordinated and balanced deformation 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 the schematic cross-sectional view of the utility model installed in the 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 solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The technical scheme of the utility model is specifically 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 present invention, the transverse geotextile bag 1 is communicated with the longitudinal geotextile bag 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 utility model discloses a structural feature, the utility model discloses a still have following advantage:
the utility model can be applied to the areas with strong water-rich surrounding rocks, can block water in time, and reduces the risk of unfavorable geological construction to personnel; 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 preferred embodiment of the present invention, and is not intended to limit the present invention.
The part of the utility model not detailed is 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 pour into 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).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120538853.6U CN214464208U (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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| Application Number | Priority Date | Filing Date | Title |
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| CN202120538853.6U CN214464208U (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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| CN214464208U true CN214464208U (en) | 2021-10-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796782A (en) * | 2021-03-16 | 2021-05-14 | 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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2021
- 2021-03-16 CN CN202120538853.6U patent/CN214464208U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796782A (en) * | 2021-03-16 | 2021-05-14 | 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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