CN220133991U - Settlement preventing structure for steel arch frame of weak surrounding rock tunnel - Google Patents
Settlement preventing structure for steel arch frame of weak surrounding rock tunnel Download PDFInfo
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- CN220133991U CN220133991U CN202321579076.5U CN202321579076U CN220133991U CN 220133991 U CN220133991 U CN 220133991U CN 202321579076 U CN202321579076 U CN 202321579076U CN 220133991 U CN220133991 U CN 220133991U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 208
- 239000010959 steel Substances 0.000 title claims abstract description 208
- 239000011435 rock Substances 0.000 title claims abstract description 33
- 238000004062 sedimentation Methods 0.000 claims abstract description 36
- 238000003466 welding Methods 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 15
- 230000000452 restraining effect Effects 0.000 abstract 1
- 230000008093 supporting effect Effects 0.000 description 8
- 230000006378 damage Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Lining And Supports For Tunnels (AREA)
Abstract
The utility model provides a steel arch anti-sedimentation structure of a weak surrounding rock tunnel, which comprises a plurality of anti-sedimentation units which are sequentially connected along the longitudinal direction of the tunnel, wherein each anti-sedimentation unit comprises a longitudinal connecting member and two steel arch structures which are oppositely arranged along the longitudinal direction of the tunnel, two adjacent anti-sedimentation units are connected through the longitudinal connecting member, each steel arch structure comprises a steel arch main body supported on surrounding rock and a connecting assembly used for connecting the steel arch main body and the longitudinal connecting member, the longitudinal connecting member is arranged between the two steel arch structures, and two ends of each longitudinal connecting member are respectively connected to the corresponding connecting assembly. The arrangement makes overall structure simple, construction convenient and fast, forms the space stress system with the structure through vertical connecting elements, has stronger restraining force to subsidence, and can improve the atress of each section of tunnel simultaneously to reduce the inhomogeneous subsidence of each section, improve overall stress performance, thereby ensure tunnel construction safety.
Description
Technical Field
The utility model relates to the technical field of tunnel support, in particular to a steel arch anti-sedimentation structure of a weak surrounding rock tunnel.
Background
With the rapid development of the infrastructure in China, the proportion of mountain tunnels in highway engineering is gradually increased. Often there is the shaft in tunnel engineering in the weak surrounding rock stratum, surrounding rock broken and intensity is low, produces large deformation easily in the construction and even primary support structure destruction, and construction risk is high.
At present, a construction method of a reserved core soil method is often adopted in the construction of a weak surrounding rock tunnel, an anchor net spraying and steel arch combined support system is adopted in the primary support, the steel arch of an upper step is erected on a weak soil layer after the construction of the steel arch of the upper step is completed, the steel arch is easy to wholly subside in the construction of the junction of the upper step and the lower step, and uneven subsidence is easy to occur between the arches due to the sequence of construction procedures. Aiming at the sedimentation problem of the steel arch in the prior art, a lock foot small guide pipe and the steel arch are generally adopted to strengthen the supporting structure in a steel bar welding mode, but the supporting structure in the connecting mode has weak integrity, the sedimentation of the steel arch cannot be effectively controlled, the uneven sedimentation among the steel arches cannot be solved, and the sedimentation and even the damage of the steel arch are easily caused.
In view of this, it is necessary to propose a weak surrounding rock tunnel steel arch anti-settling structure to solve or at least alleviate the above-mentioned drawbacks.
Disclosure of Invention
The utility model mainly aims to provide a weak surrounding rock tunnel steel arch anti-sedimentation structure, which aims to solve the problems that the structural integrity of a reinforcing and supporting mode in the prior art is not strong, sedimentation of the steel arch cannot be effectively controlled, uneven sedimentation among the steel arches cannot be solved, and sedimentation and even damage of the steel arch are easily caused.
In order to achieve the above purpose, the utility model provides a steel arch anti-sedimentation structure of a weak surrounding rock tunnel, which comprises a plurality of anti-sedimentation units connected in sequence along the longitudinal direction of the tunnel, wherein each anti-sedimentation unit comprises a longitudinal connecting member and two steel arch structures oppositely arranged along the longitudinal direction of the tunnel, and two adjacent anti-sedimentation units are connected through the longitudinal connecting members; wherein,
the steel arch structure comprises a steel arch main body supported on surrounding rock and a connecting assembly used for connecting the steel arch main body and the longitudinal connecting member, and the connecting assembly is fixed on the steel arch main body;
the longitudinal connecting members are arranged between the two steel arch structures, and two ends of the longitudinal connecting members are respectively connected to the corresponding connecting assemblies.
Preferably, the connection assembly divides the steel arch body into an upper arch above the connection assembly and a lower arch below the connection assembly; wherein,
the connecting assembly comprises a fixed steel plate and a connecting steel plate, wherein the fixed steel plate is connected to the top of the lower arch frame, the connecting steel plate is fixed to the bottom of the upper arch frame, a plurality of first connecting holes are formed in the fixed steel plate, a plurality of second connecting holes which are arranged in one-to-one correspondence with the first connecting holes are formed in the connecting steel plate, the connecting steel plate penetrates through the first connecting holes through bolts, the second connecting holes are fixedly connected with the fixed steel plate, and two ends of the longitudinal connecting members are respectively connected to the corresponding connecting steel plates.
Preferably, the longitudinal connecting member is a channel steel, the open end of the channel steel deviates from the inner wall of the tunnel, two third connecting holes for the fastener to penetrate are formed in the bottom of the channel steel, fourth connecting holes which are arranged in one-to-one correspondence with the third connecting holes are formed in the end part, close to the longitudinal connecting member, of the connecting steel plate, and the channel steel penetrates through the third connecting holes and the fourth connecting holes through the fastener so as to be fixedly connected to the upper side of the connecting steel plate.
Preferably, the length of the connection steel plate is greater than the length of the fixed steel plate.
Preferably, the tunnel further comprises a small locking foot guide pipe, one end of the small locking foot guide pipe is fixedly connected with the side wall of the channel steel through welding, and the other end of the small locking foot guide pipe extends into the inner wall of the tunnel and extends downwards in an inclined mode.
Preferably, the channel steel and the upper arch are arranged at intervals, and the interval distance is 15 cm-25 cm.
Preferably, the number of the first connecting holes is four, and the four first connecting holes are distributed on the fixed steel plate in a matrix.
Preferably, the included angle between the pin locking small guide pipe and the vertical direction is 25-35 degrees.
Preferably, both ends of the connecting steel plate extend out of both sides of the fixed steel plate by 60 cm-80 cm.
Preferably, the fastener is a high strength bolt.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a steel arch anti-sedimentation structure of a weak surrounding rock tunnel, which comprises a plurality of anti-sedimentation units which are sequentially connected along the longitudinal direction of the tunnel, wherein each anti-sedimentation unit comprises a longitudinal connecting member and two steel arch structures which are oppositely arranged along the longitudinal direction of the tunnel, two adjacent anti-sedimentation units are connected through the longitudinal connecting member, each steel arch structure comprises a steel arch main body supported on surrounding rock and a connecting assembly used for connecting the steel arch main body and the longitudinal connecting member, the longitudinal connecting member is arranged between the two steel arch structures, and two ends of each longitudinal connecting member are respectively connected to the corresponding connecting assembly. So set up and make overall structure simple, construction convenient and fast forms space atress system with the structure through vertical connecting elements, has stronger confining force to subside, especially to close on vertical uneven settlement effect better, and can improve the atress of each section of tunnel simultaneously to reduce the uneven settlement of each section, improve whole atress performance, thereby ensure tunnel construction safety.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic elevational view of an anti-settling unit according to one embodiment of the present utility model;
FIG. 2 is a schematic cross-sectional view taken along the direction A-A in FIG. 1;
FIG. 3 is a schematic diagram showing the connection of two adjacent anti-settling units in an embodiment of the present utility model;
fig. 4 is a schematic side view of the connection of a pin locking catheter in one embodiment of the present utility model.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Reference numerals illustrate:
10. a longitudinal connecting member; 110. channel steel; 111. locking the small foot guide tube; 20. a steel arch structure; 210. a steel arch body; 211. an upper arch; 212. a lower arch; 220. a connection assembly; 221. fixing the steel plate; 222. and connecting the steel plates.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
Referring to fig. 1-4, in an embodiment of the present utility model, a steel arch anti-settling structure for a weak surrounding rock tunnel includes a plurality of anti-settling units sequentially connected in a tunnel longitudinal direction, each anti-settling unit includes a longitudinal connecting member 10 and two steel arch structures 20 oppositely disposed in the tunnel longitudinal direction, and two adjacent anti-settling units are connected by the longitudinal connecting member 10. Firstly, it should be noted that, unlike the settling problem of the steel arch in the prior art, the supporting structure is usually reinforced by adopting the mode of welding the small lock leg pipe 111 and the steel arch through steel bars, but the supporting structure is not strong in integrity, the settling of the steel arch cannot be effectively controlled, and the uneven settling among the steel arches cannot be solved, so that the settling and even the damage of the steel arch are easily caused. The utility model solves the defects in the prior art by arranging the steel arch anti-sedimentation structure of the weak surrounding rock tunnel. The method comprises the following steps:
the steel arch structure 20 comprises a steel arch main body 210 supported on surrounding rock and a connecting assembly 220 for connecting the steel arch main body 210 and the longitudinal connecting member 10, wherein the connecting assembly 220 is fixed on the steel arch main body 210; the longitudinal connecting members 10 are disposed between the two steel arch structures 20, and both ends of the longitudinal connecting members 10 are respectively connected to the corresponding connecting assemblies 220.
Specifically, the steel arch anti-sedimentation structure of the whole weak surrounding rock tunnel comprises a plurality of anti-sedimentation units which are sequentially connected along the longitudinal direction of the tunnel so as to ensure the anti-sedimentation effect of each part of the tunnel along the longitudinal direction, wherein each anti-sedimentation unit comprises a longitudinal connecting member 10 and two steel arch structures 20 which are oppositely arranged along the longitudinal direction of the tunnel, the steel arch structures 20 are steel arches which are commonly used for primary support of the tunnel, and can be in the form of I-steel and are commonly used as primary support means in tunnel engineering, so detailed description is omitted here; the longitudinal connecting members 10 are used for connecting two adjacent steel arch structures 20 into a whole, so that a space whole stress system is formed between the steel arch structures 20 through the connection of the longitudinal connecting members 10, stress at each section position of the tunnel is improved, mutual uniform stress is realized, and uneven settlement is reduced; and two adjacent anti-sedimentation units are also connected through the longitudinal connecting member 10, so that the whole anti-sedimentation structure of the steel arch of the weak surrounding rock tunnel is finally formed, and particularly, refer to fig. 3.
Wherein the steel arch structure 20 comprises a steel arch body 210 and a connecting assembly 220, the steel arch body 210 is supported on surrounding rock and used as an initial support; the connection assembly 220 is used to connect the steel arch body 210 and the longitudinal connection member 10, and is fixed to the steel arch body 210, it should be noted that the connection assembly 220 may be preferably disposed at a step boundary or at a node position where settlement is likely to occur, and the arch is preferably prevented from settling by being disposed in a targeted manner because settlement is likely to occur at a node position similar to a step boundary; for convenience of construction connection, the longitudinal connecting members 10 are disposed between the two steel arch structures 20, and both ends of the longitudinal connecting members 10 are respectively connected to the corresponding connecting assemblies 220 to form each of the anti-settling units, refer to fig. 1.
As a preferred embodiment of the present utility model, the connection assembly 220 divides the steel arch body 210 into an upper arch 211 located above the connection assembly 220 and a lower arch 212 located below the connection assembly 220; the connecting assembly 220 comprises a fixed steel plate 221 and a connecting steel plate 222, the fixed steel plate 221 is connected to the top of the lower arch 212, the connecting steel plate 222 is fixed to the bottom of the upper arch 211, a plurality of first connecting holes are formed in the fixed steel plate 221, a plurality of second connecting holes which are arranged in one-to-one correspondence with the first connecting holes are formed in the connecting steel plate 222, the connecting steel plate 222 penetrates through the first connecting holes and the second connecting holes through bolts and is fixedly connected with the fixed steel plate 221, and two ends of the longitudinal connecting member 10 are respectively connected to the corresponding connecting steel plates 222.
It should be noted that, since the connection assembly 220 is fixed to the steel arch body 210, the connection assembly 220 divides the steel arch body 210 into an upper arch 211 located above the connection assembly 220 and a lower arch 212 located below the connection assembly 220, so that the upper arch 211 and the lower arch 212 remain to form an integral structure, the connection assembly 220 includes a fixing steel plate 221 and a connecting steel plate 222, the fixing steel plate 221 is used to connect the upper arch 211 and the lower arch 212 to each other, the bottom of the fixing steel plate 221 is connected to the top of the lower arch 212, and the connecting steel plate 222 is additionally provided between the fixing steel plate 221 and the upper arch 211 bracket in view of facilitating the connection when the longitudinal connection member 10 is installed, and the top of the connecting steel plate 222 is fixed to the bottom of the upper arch 211.
Further, in order to fix the fixing steel plate 221 and the connecting steel plate 222 to each other, a plurality of first connecting holes (not labeled in the drawing) are formed in the fixing steel plate 221, a plurality of second connecting holes (not labeled in the drawing) are formed in the connecting steel plate 222 and are arranged in one-to-one correspondence with the first connecting holes, wherein the one-to-one arrangement means that the second connecting holes are consistent with the first connecting holes in size and are arranged on the same axis, so that the connecting steel plate 222 penetrates through the first connecting holes and the second connecting holes through bolts to be fixedly connected with the fixing steel plate 221, and two ends of the longitudinal connecting member 10 are connected to the corresponding connecting steel plates 222 respectively.
It should be noted that, in another preferred embodiment, the connecting assembly 220 may be configured as a single piece of thickened steel plate, and two ends of the connecting assembly extend out of the upper arch 211 and the lower arch 212, so as to facilitate the installation connection of the longitudinal connecting members 10 while satisfying the structural connection strength.
As a preferred embodiment of the present utility model, the longitudinal connecting member 10 is a channel steel 110, an open end of the channel steel 110 faces away from an inner wall of the tunnel, two third connecting holes through which fasteners penetrate are formed on a bottom of the channel steel 110, fourth connecting holes which are arranged in one-to-one correspondence with the third connecting holes are formed at an end portion of the connecting steel plate 222, which is close to the longitudinal connecting member 10, and the channel steel 110 penetrates through the third connecting holes and the fourth connecting holes through the fasteners to be fixedly connected above the connecting steel plate 222.
It should be noted that, the longitudinal connecting member 10 adopts the channel steel 110, the channel steel 110 has the advantages of light dead weight and suitable economy, the channel steel 110 has good mechanical properties, and the cross section is extensive and balanced, the open end of the channel steel 110 is deviated from the inner wall of the tunnel, so that the steel plate side wall of the channel steel 110 is close to the surrounding rock layer for bearing force, and the two short sides of the channel steel 110 are used for connecting with the connecting steel plate 222, therefore, two third connecting holes (not labeled in the figure) for the fastener to penetrate are formed on the bottom of the channel steel 110, fourth connecting holes (not labeled in the figure) which are distributed in one-to-one correspondence with the third connecting holes are formed at the end of the connecting steel plate 222, and the one-to-one distribution means that the size of the third connecting holes is consistent with the size of the fourth connecting holes and the coaxial line is formed, so that the channel steel 110 penetrates through the third connecting holes and the fourth connecting holes through the fastener to be fixedly connected above the connecting steel plate 222; the fastening piece can be a bolt, a screw, a rivet and the like, and it is understood that the fastening piece is convenient to construct and operate in a connecting mode.
As a preferred embodiment of the present utility model, the length of the connection steel plate 222 is greater than the length of the fixed steel plate 221. It should be noted that the length of the connecting steel plate 222 is greater than that of the fixing steel plate 221, which means that both ends of the connecting steel plate 222 extend out of the fixing steel plate 221, so that the channel steel 110 is installed, and both ends of the channel steel 110 can be connected to the corresponding connecting steel plates 222.
Further, both sides of the connection steel plate 222 are lengthened while the bottom stress of the steel arch body 210 is reduced by increasing the stress area, thereby reducing the amount of settlement.
As a preferred embodiment of the present utility model, the tunnel further includes a pin locking small pipe 111, one end of the pin locking small pipe 111 is fixedly connected with the side wall of the channel steel 110 by welding, and the other end of the pin locking small pipe 111 extends into the inner wall of the tunnel and extends downward in an oblique direction.
It should be noted that the pin locking small pipe 111 may be used to prevent the pin from shrinking and falling off, and serve as a supporting point to support and prevent the pin from deforming, while in the present utility model, by adding the pin locking small pipe 111, one end of the pin locking small pipe is fixedly connected with the side wall of the channel steel 110 by welding, and the other end of the pin locking small pipe extends into the inner wall of the tunnel and extends downward in an inclined direction, so as to enhance the integrity of the pin locking small pipe 111 and the channel steel 110, thereby further supporting each of the anti-settling units to prevent uneven settling.
Further, the channel steel 110 and the upper arch 211 are spaced apart from each other by a distance of 15cm to 25cm. It should be noted that the space between the channel steel 110 and the upper arch 211 is set to have a clear distance, so as to form a reserved construction space, so that a technician can perform construction, the space distance can be set to 15 cm-25 cm, and the specific value thereof can be determined by one skilled in the art according to specific needs.
Further, the number of the first connecting holes is four, and the four first connecting holes are distributed on the fixed steel plate 221 in a matrix. It should be understood that, the greater the number of the first connection holes, the better the connection effect after the bolts are installed, and in view of the cost and the reinforcement effect, preferably, the number of the first connection holes is four, and the four first connection holes are distributed on the fixed steel plate 221 in a matrix, so that the four sides of the fixed steel plate 221 are fixedly connected with the connection steel plate 222, and therefore, the number of the second connection holes correspondingly arranged is also correspondingly four.
Further, the included angle between the pin locking small pipe 111 and the vertical direction is 25-35 degrees. It should be noted that, because the pin locking small pipe 111 is located close to the arch leg of the steel arch structure 20 in the present utility model, in order to ensure the supporting effect on the steel arch, the included angle between the pin locking small pipe 111 and the vertical direction is 25 ° to 35 °, preferably, the included angle may be set to 30 °, and those skilled in the art may optionally set according to the specific structure.
Further, both ends of the connection steel plate 222 extend from 60cm to 80cm at both sides of the fixed steel plate 221. It should be noted that, in order to facilitate the connection of the channel steel 110, the two ends of the connection steel plate 222 extend out of the fixed steel plate 221 by a sufficient length, the extending length is too small to facilitate the construction, and the extending length is too large to cause the distance between the channel steel 110 and the steel arch structure 20 to be too large, so that the structural integrity is reduced and the structural strength is reduced, so that the two ends of the connection steel plate 222 extend out of the two sides 60 cm-80 cm of the fixed steel plate 221, preferably, may be set to 70cm, and those skilled in the art may set according to practical situations.
Further, the fastener adopts a high-strength bolt. It will be appreciated that the fasteners preferably employ high strength bolts to avoid damage caused by insufficient strength of the tie bolts due to the relatively high settling pressure caused by the rock strata during settling.
The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. The steel arch anti-sedimentation structure of the weak surrounding rock tunnel is characterized by comprising a plurality of anti-sedimentation units which are sequentially connected in the longitudinal direction of the tunnel, wherein each anti-sedimentation unit comprises a longitudinal connecting member and two steel arch structures which are oppositely arranged in the longitudinal direction of the tunnel, and two adjacent anti-sedimentation units are connected through the longitudinal connecting members; wherein,
the steel arch structure comprises a steel arch main body supported on surrounding rock and a connecting assembly used for connecting the steel arch main body and the longitudinal connecting member, and the connecting assembly is fixed on the steel arch main body;
the longitudinal connecting members are arranged between the two steel arch structures, and two ends of the longitudinal connecting members are respectively connected to the corresponding connecting assemblies.
2. A weak surrounding rock tunnel steel arch anti-settling structure according to claim 1, wherein said connection assembly separates said steel arch body into an upper arch above said connection assembly and a lower arch below said connection assembly; wherein,
the connecting assembly comprises a fixed steel plate and a connecting steel plate, wherein the fixed steel plate is connected to the top of the lower arch frame, the connecting steel plate is fixed to the bottom of the upper arch frame, a plurality of first connecting holes are formed in the fixed steel plate, a plurality of second connecting holes which are arranged in one-to-one correspondence with the first connecting holes are formed in the connecting steel plate, the connecting steel plate penetrates through the first connecting holes through bolts, the second connecting holes are fixedly connected with the fixed steel plate, and two ends of the longitudinal connecting members are respectively connected to the corresponding connecting steel plates.
3. The weak surrounding rock tunnel steel arch anti-sedimentation structure according to claim 2, wherein the longitudinal connecting member is a channel steel, an opening end of the channel steel deviates from the inner wall of the tunnel, two third connecting holes for a fastener to penetrate are formed in the bottom of the channel steel, fourth connecting holes which are arranged in one-to-one correspondence with the third connecting holes are formed in the end part, close to the longitudinal connecting member, of the connecting steel plate, and the channel steel penetrates through the third connecting holes and the fourth connecting holes through the fastener to be fixedly connected to the upper part of the connecting steel plate.
4. A weak surrounding rock tunnel steel arch anti-settling structure according to claim 2, wherein the length of the connecting steel plates is greater than the length of the fixed steel plates.
5. A weak surrounding rock tunnel steel arch anti-sedimentation structure according to claim 3, further comprising a locking foot small conduit, wherein one end of the locking foot small conduit is fixedly connected with the side wall of the channel steel through welding, and the other end of the locking foot small conduit extends into the inner wall of the tunnel and extends downwards in an inclined manner.
6. A weak surrounding rock tunnel steel arch anti-settling structure according to claim 3, wherein the channel steel and the upper arch are arranged at intervals, and the interval distance is 15 cm-25 cm.
7. The weak surrounding rock tunnel steel arch anti-sedimentation structure according to claim 2, wherein the number of the first connecting holes is four, and the four first connecting holes are distributed on the fixed steel plate in a matrix.
8. A weak surrounding rock tunnel steel arch anti-settling structure according to claim 5, wherein the included angle between the locking foot small conduit and the vertical direction is 25-35 °.
9. The weak surrounding rock tunnel steel arch anti-sedimentation structure according to claim 4, wherein both ends of the connecting steel plates extend from 60cm to 80cm on both sides of the fixed steel plates.
10. A weak surrounding rock tunnel steel arch anti-settling structure according to claim 3, wherein the fasteners are high strength bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321579076.5U CN220133991U (en) | 2023-06-20 | 2023-06-20 | Settlement preventing structure for steel arch frame of weak surrounding rock tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321579076.5U CN220133991U (en) | 2023-06-20 | 2023-06-20 | Settlement preventing structure for steel arch frame of weak surrounding rock tunnel |
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| CN220133991U true CN220133991U (en) | 2023-12-05 |
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| CN202321579076.5U Active CN220133991U (en) | 2023-06-20 | 2023-06-20 | Settlement preventing structure for steel arch frame of weak surrounding rock tunnel |
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| Country | Link |
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| CN (1) | CN220133991U (en) |
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- 2023-06-20 CN CN202321579076.5U patent/CN220133991U/en active Active
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