CN113622959A - Tunnel supporting structure and construction method thereof - Google Patents
Tunnel supporting structure and construction method thereof Download PDFInfo
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- CN113622959A CN113622959A CN202111065943.9A CN202111065943A CN113622959A CN 113622959 A CN113622959 A CN 113622959A CN 202111065943 A CN202111065943 A CN 202111065943A CN 113622959 A CN113622959 A CN 113622959A
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- 238000010276 construction Methods 0.000 title claims abstract description 72
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 98
- 239000010959 steel Substances 0.000 claims abstract description 98
- 239000004567 concrete Substances 0.000 claims abstract description 86
- 230000000712 assembly Effects 0.000 claims abstract description 45
- 238000000429 assembly Methods 0.000 claims abstract description 45
- 239000011435 rock Substances 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000009415 formwork Methods 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 6
- 239000003351 stiffener Substances 0.000 description 6
- 239000011376 self-consolidating concrete Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
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- 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
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- 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- Engineering & Computer Science (AREA)
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- Architecture (AREA)
- Structural Engineering (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a tunnel supporting structure and a construction method thereof, wherein the tunnel supporting structure comprises the following steps: sequentially splicing the inner ring steel plates along the circumferential direction of the tunnel to assemble a supporting ring assembly; sequentially assembling supporting ring assemblies with target lengths along the length direction of the tunnel to form a concrete template; and introducing concrete into the concrete template, and forming a steel plate-concrete combined segment structure after the concrete is hardened and formed so as to form a permanent supporting system of the tunnel surrounding rock. The construction method of the tunnel supporting structure provided by the invention improves the construction convenience of the tunnel supporting structure, and has the advantages of short construction period, water flow splitting resistance, concrete crack exposure avoidance and the like.
Description
Technical Field
The invention relates to the technical field of tunnel engineering supporting structures, in particular to a tunnel supporting structure and a construction method thereof.
Background
Tunnels are engineering structures buried in the ground and are a form of human use of underground space. Along with the development of society, high-rise forests on the ground have less and less available area, so that the road traffic pressure is relieved for the convenience of life of people, and the tunnel is suitable for transportation.
Tunnel construction generally refers to excavation of a tunnel in a mountain or underground, and in tunnel construction, support and protection are generally required using a support device in order to avoid collapse of a tunnel roof.
In the construction of tunnel engineering, the steel plate-concrete combined segment structure is suitable for TBM (Tunnel Boring machine) construction, and has wide application prospect in the construction of large tunnel engineering. Among them, the construction measures of the steel plate-concrete combined segment suitable for the tunnel rock mass support system are a great technical difficulty. At present, a tunnel engineering supporting structure mostly adopts reinforced concrete segments, and the template erection is difficult.
Disclosure of Invention
The invention mainly aims to provide a tunnel supporting structure and a construction method thereof, aiming at improving the convenience of the construction of the tunnel supporting structure.
In order to achieve the purpose, the invention provides a construction method of a tunnel supporting structure, which comprises the following steps:
sequentially splicing the inner ring steel plates along the circumferential direction of the tunnel to assemble a supporting ring assembly;
sequentially assembling supporting ring assemblies with target lengths along the length direction of the tunnel to form a concrete template;
and introducing concrete into the concrete template, and forming a steel plate-concrete combined segment structure after the concrete is hardened and formed so as to form a permanent supporting system of the tunnel surrounding rock.
Optionally, the step of sequentially splicing the inner ring steel plates along the circumferential direction of the tunnel to assemble the support ring assembly specifically includes:
mounting a first inner ring steel plate on the inner wall of the tunnel;
and sequentially splicing the inner ring steel plates end to end along the circumferential direction of the tunnel to assemble the supporting ring assembly.
Optionally, the step of sequentially assembling the support ring assemblies of the target length along the length direction of the tunnel to form the concrete formwork specifically includes:
and sequentially splicing the supporting ring assemblies of the target number along the length direction of the tunnel by taking the constructed supporting ring assemblies as a reference so as to form the concrete template.
Optionally, the inner ring steel plates are sequentially spliced end to end along the circumferential direction of the tunnel to assemble a supporting ring assembly, and the method specifically includes:
and connecting and fixing first splicing plates of two inner ring steel plates which are adjacent to each other in the circumferential direction of the tunnel through bolts to form the supporting ring assembly.
Optionally, the step of sequentially splicing the support ring assemblies of a target number along the length direction of the tunnel by using the constructed support ring assemblies as a reference to form the concrete formwork specifically includes:
connecting and fixing second splicing plates of two inner ring steel plates which are adjacent to each other in the circumferential direction of the tunnel through bolts; and/or
And the abutting positions of the two inner ring steel plates adjacent to each other in the tunnel ring direction are fixed by welding.
Optionally, the step of introducing concrete into the concrete form specifically includes:
and injecting the concrete into a closed space between the inner ring steel plate and the inner wall of the tunnel through a grouting opening.
In order to achieve the above object, the present invention also provides a tunnel supporting structure formed by the tunnel supporting structure construction method as described above, the tunnel supporting structure including:
the support ring assemblies are suitable for being arranged on the inner wall of the tunnel, a grouting cavity is formed between the support ring assemblies and the inner wall of the tunnel, the number of the support ring assemblies is at least one, and at least one support ring assembly is sequentially spliced along the length direction of the tunnel; and
and concrete is injected into the grouting cavity.
Optionally, each of the retaining ring assemblies comprises:
each inner ring steel plate is arranged in an arch shape, and each inner ring steel plate is provided with at least one grouting opening; and the inner ring steel plates are sequentially spliced end to end along the circumferential direction of the tunnel.
Optionally, each of the inner ring steel plates has two opposite arc edges and two opposite side edges, and each of the supporting ring assemblies further includes:
the two arc edges of the inner ring steel plate are provided with the first splicing plates, and the two adjacent first splicing plates along the circumferential direction of the inner wall of the tunnel are fixedly connected through bolts; and
and the two sides of the inner ring steel plate are provided with the second splicing plates, and the two adjacent second splicing plates along the length direction of the inner wall of the tunnel are fixedly connected through bolts.
Optionally, each inner ring steel sheet all is provided with at least one first stiffening rib and at least one second stiffening rib, first stiffening rib follows the hoop extension setting of inner ring steel sheet, the second stiffening rib follows the width direction extension setting of inner ring steel sheet.
Optionally, each inner ring steel plate is provided with a plurality of shear connectors.
The construction method of the tunnel supporting structure provided by the invention comprises the following steps of firstly sequentially splicing inner ring steel plates along the circumferential direction of a tunnel to assemble a supporting ring assembly; sequentially assembling supporting ring assemblies with target lengths along the length direction of the tunnel to form a concrete template; then, introducing concrete into the concrete template, and forming a steel plate-concrete combined segment structure after the concrete is hardened and formed so as to form a permanent supporting system of the tunnel surrounding rock. According to the technical scheme, the construction of the supporting structure is carried out in a section-by-section propelling mode, the construction sections with reasonable length are firstly arranged, the constructed structures are used as the reference, the spatial positions of the template systems of the subsequent construction sections are positioned, then the concrete is guided in and formed, the construction of the sections is completed, the complexity of the whole construction is relatively low, and the convenience of the construction of the tunnel supporting structure is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a partial structural view of a tunnel supporting structure according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a tunnel supporting structure according to an embodiment of the present invention;
fig. 3 is a schematic structural view of an inner ring steel plate in an embodiment of the tunnel supporting structure of the present invention;
fig. 4 is a schematic flow chart illustrating a construction method of a tunnel supporting structure according to an embodiment of the present invention.
The reference numbers illustrate:
100. a support ring assembly; 200. concrete; 10. an inner ring steel plate; 11. a first splice plate; 12. a second splice plate; 111. a first stiffener; 112. a second stiffener; 113. a shear connector.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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 obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In order to improve the construction convenience of the tunnel supporting structure, the invention provides the tunnel supporting structure which can be applied to various underground space structures, particularly deep-buried tunnels, and the tunnel supporting structure is not limited in the position.
Referring to fig. 1 and 2, the tunnel supporting structure comprises supporting ring assemblies 100 and concrete 200, wherein the supporting ring assemblies 100 are suitable for being arranged on the inner wall of a tunnel and a grouting cavity is formed between the supporting ring assemblies 100 and the inner wall of the tunnel, the number of the supporting ring assemblies 100 is at least one, and at least one supporting ring assembly 100 is sequentially spliced along the length direction of the tunnel; concrete 200 is injected into the grouting cavity.
In this embodiment, the concrete form is composed of a supporting ring assembly 100, the supporting ring assembly 100 may be formed by assembling a plurality of metal plates such as steel plates or aluminum alloy plates, and may be disposed in an annular or arch shape, a space between the supporting ring assembly 100 and the inner wall of the tunnel is a grouting cavity, and the grouting cavity may be disposed in an annular or arch shape, which is not limited herein.
The concrete 200 in this embodiment may be self-compacting concrete or ordinary concrete, and is not limited in this respect.
Among them, Self-Compacting Concrete (SCC) refers to Concrete that can flow and compact under its own gravity, and can completely fill a formwork even if dense steel bars exist, and at the same time, can obtain good homogeneity without additional vibration. The self-compacting concrete has the following advantages: 1. the concrete is guaranteed to be well dense; 2. the production efficiency is improved, and because the vibration is not needed, the time required by concrete pouring is greatly shortened, the labor intensity of workers is greatly reduced, and the number of required workers is reduced; 3. the working environment and the safety are improved, the vibration noise is avoided, and the arm vibration syndrome caused by the fact that a worker holds the vibrator for a long time is avoided; 4. improve the surface quality of concrete. Surface bubbles or honeycomb pitted surface can not appear, and surface repair is not needed; the texture or the sculpt of the surface of the template can be vividly presented. 5. The freedom degree of structural design is increased, vibration is not needed, and a structure with a complex shape, a thin wall and dense reinforcing bars can be cast and molded; previously, such structures have often been limited in their adoption due to difficulties in concrete placement; 6. the abrasion of the template caused by vibration is avoided; 7. the abrasion of the concrete to the mixer is reduced; 8. the whole construction cost of the project can be reduced, and the cost is reduced in a plurality of aspects of improving the construction speed, limiting the noise by the environment, reducing the labor, ensuring the quality and the like.
In the technical scheme, the tunnel supporting structure comprises supporting ring assemblies 100 and concrete 200, wherein the supporting ring assemblies 100 are suitable for being arranged on the inner wall of a tunnel, a grouting cavity is formed between the supporting ring assemblies 100 and the inner wall of the tunnel, the number of the supporting ring assemblies 100 is at least one, and at least one supporting ring assembly 100 is sequentially spliced along the length direction of the tunnel; concrete 200 is injected into the grouting cavity. It can be understood that, during construction, the supporting ring assembly 100 can be assembled first, and then the concrete 200 is injected into the grouting cavity, so that the supporting structure can be completed by adopting sectional construction, and the construction convenience of the tunnel supporting structure is improved.
It is worth mentioning that because the concrete 200 of the supporting structure is supported and protected by the supporting ring assembly 100, the tunnel supporting structure has the advantages of resisting water flow splitting, avoiding the crack of the concrete 200 from being exposed and the like, and has a wide application prospect.
In order to further improve the construction convenience of the tunnel supporting structure, in an embodiment, referring to fig. 1 to 3, each supporting ring assembly 100 may include a plurality of inner ring steel plates 10, each inner ring steel plate 10 is disposed in an arch shape, and each inner ring steel plate 10 is provided with at least one grouting hole; and the inner ring steel plates 10 are sequentially spliced end to end along the circumferential direction of the tunnel.
In this embodiment, can transport polylith inner ring steel sheet 10 to the tunnel in, then carry out the site segmentation construction, can greatly promote the construction convenience that promotes tunnel supporting construction, shorten construction cycle, the inner ring steel sheet 10 of fritter also better manufacturing simultaneously, still can make things convenient for the loading transportation.
In order to connect two adjacent inner ring steel plates 10 conveniently, each inner ring steel plate 10 has two opposite arc edges and two opposite side edges, referring mainly to fig. 3, each support ring assembly 100 may further include a first splice plate 11 and a second splice plate 12, the two arc edges of the inner ring steel plates 10 are provided with the first splice plates 11, and the two adjacent first splice plates 11 are connected and fixed by bolts along the circumferential direction of the inner wall of the tunnel; the two sides of the inner ring steel plate 10 are provided with second splicing plates 12, and the two adjacent second splicing plates 12 along the length direction of the inner wall of the tunnel are fixedly connected through bolts. So set up, can greatly promote along two inner ring steel sheet 10 adjacent in tunnel inner wall hoop and along two inner ring steel sheet 10 adjacent in tunnel inner wall length direction's concatenation convenience, still can reduce the size of concatenation seam, promote this tunnel supporting construction's waterproof performance.
It should be noted that, in this embodiment, the inner ring steel plate 10 may serve as a protective layer for the concrete 200, and may prevent water from splitting the concrete 200 in the application of the diversion tunnel, and may prevent the crack of the segment of the concrete 200 from being exposed in the application of other tunnels.
In this embodiment, the first splice plate 11 and the second splice plate 12 can be fixed to the inner ring steel plate 10 by welding, screwing, riveting, or integrally formed, and this is not limited herein.
Further, in an embodiment, as shown in fig. 3, each inner ring steel plate 10 is provided with at least one first stiffening rib 111 and at least one second stiffening rib 112, the first stiffening rib 111 is disposed to extend along a circumferential direction of the inner ring steel plate 10, and the second stiffening rib 112 is disposed to extend along a width direction of the inner ring steel plate 10 for enhancing bending rigidity thereof.
In this embodiment, the number of the first stiffeners 111 may be plural, and the plural first stiffeners 111 are uniformly arranged at intervals in the width direction of the inner ring steel plate 10. The number of the second stiffeners 112 may be plural, and the plural second stiffeners 112 may be arranged at regular intervals in the width direction of the inner ring steel plate 10. So set up, can make inner ring steel sheet 10 satisfy better atress requirement, and then greatly promote the atress performance of whole supporting construction.
In order to improve the stability of the supporting structure during the construction stage and the overall performance of the supporting structure during the use stage, and to make the supporting structure have better anti-rock burst performance, in an embodiment, the inner ring steel plate 10 may be provided with a plurality of shear connectors 113.
The shear connector 113 may be a stud, etc., but is not limited thereto. The plurality of shear connectors 113 may be uniformly distributed on the inner ring steel plate 10.
Referring primarily to fig. 2, in some embodiments, two adjacent guard ring assemblies 100 may be assembled together at a staggered joint along the length of the tunnel. Therefore, the longitudinal rigidity of the tunnel supporting structure can be improved, the displacement is reduced, and the overall stability is improved.
In order to facilitate construction and reduce construction period, the tunnel supporting structure may adopt a segmental construction method, and preferably, the number of the supporting ring assemblies 100 may be 6, and each supporting ring assembly 100 has 6 inner ring steel plates 10.
Of course, in some other embodiments, the tunnel supporting structure may also use fewer or more supporting ring assemblies 100, and each supporting ring assembly 100 may use fewer or more inner ring steel plates 10, and may be designed to be adapted according to the size of the tunnel to be constructed.
In this embodiment, as shown in fig. 2, the phase difference between two adjacent support ring assemblies 100 may be set to 10 ° to 50 °, so as to facilitate construction and improve the stability of the tunnel supporting structure. Preferably, when the phase difference is 30 °, a plurality of connected grouting cavities can be formed, so that the concrete 200 can flow sufficiently in the grouting cavities after being injected, and the supporting structure can achieve better stability.
The invention also provides a construction method of the tunnel supporting structure, which is based on the tunnel supporting structure and refers to fig. 4, and comprises the following steps:
s10, sequentially splicing the inner ring steel plates along the circumferential direction of the tunnel to assemble a supporting ring assembly;
step S20, sequentially assembling support ring assemblies with target lengths along the length direction of the tunnel to form a concrete template;
and S30, introducing concrete into the concrete template, and forming a steel plate-concrete combined segment structure after the concrete is hardened and formed to form a permanent supporting system of the tunnel surrounding rock.
During construction, a plurality of inner ring steel plates and other parts can be transported to a construction site, and then the inner ring steel plates are sequentially installed along the inner wall of the tunnel in the clockwise or anticlockwise direction so as to assemble the supporting ring assembly; and then sequentially mounting the supporting ring assemblies of the target number along the length direction of the inner wall of the tunnel to form the concrete formwork of the target length.
Of course, in order to shorten the construction period, the inner ring steel plate may be assembled by performing construction from two or more locations at the same time. And then, mounting a concrete template with the target length on the basis of the constructed inner ring steel plate, and finishing the assembly of the whole supporting structure frame.
In this embodiment, the connection manner between the inner ring steel plates may be bolt connection, screw connection, rivet connection, welding, or the like, or may be a combination of two or more connection manners, which is not limited herein.
It should be noted that one or more grouting openings may be formed in the inner ring steel plate to improve the efficiency of introducing concrete, thereby improving the efficiency of construction. In this embodiment, the concrete may be ordinary concrete or self-compacting concrete, and is not limited herein.
In this embodiment, the construction of the supporting structure may be performed by a stepwise propulsion method. The construction method comprises the steps of firstly setting a construction section with reasonable length, positioning the spatial position of a template system of a subsequent construction section by taking a constructed structure as a reference, and then guiding and forming concrete to complete construction of the construction section.
The construction method of the tunnel supporting structure provided by the invention comprises the following steps of firstly sequentially splicing inner ring steel plates along the circumferential direction of a tunnel to assemble a supporting ring assembly; sequentially assembling supporting ring assemblies with target lengths along the length direction of the tunnel to form a concrete template; then, introducing concrete into the concrete template, and forming a steel plate-concrete combined segment structure after the concrete is hardened and formed so as to form a permanent supporting system of the tunnel surrounding rock. According to the technical scheme, the construction of the supporting structure is carried out in a section-by-section propelling mode, the construction sections with reasonable length are firstly arranged, the constructed structures are used as the reference, the spatial positions of the template systems of the subsequent construction sections are positioned, then the concrete is guided in and formed, the construction of the sections is completed, the complexity of the whole construction is relatively low, and the convenience of the construction of the tunnel supporting structure is improved.
Further, the step of splicing the inner ring steel plates along the circumferential direction of the tunnel in sequence to assemble the support ring assembly specifically can include:
step S11, mounting a first inner ring steel plate on the inner wall of the tunnel;
and S12, sequentially splicing the inner ring steel plates end to end along the circumferential direction of the tunnel to assemble the supporting ring assembly.
In this embodiment, when last construction section does not have supporting construction, can directly build the support ring subassembly at this construction section, need not the location, the accessible erects the scaffold frame and installs first support ring subassembly, and then carries out remaining location and the installation of strutting the ring subassembly.
In an embodiment, the step of sequentially assembling the supporting ring assemblies of the target length along the length direction of the tunnel to form the concrete formwork specifically includes:
and step S21, sequentially splicing the supporting ring assemblies of the target number along the length direction of the tunnel by taking the constructed supporting ring assemblies as a reference so as to form the concrete template.
In this embodiment, referring to fig. 2, the phase difference between two adjacent retaining ring assemblies may preferably be 30 °, so as to ensure that a plurality of communicated grouting cavities are formed, so that concrete can sufficiently flow in the grouting cavities after being injected, and the supporting structure can achieve better stability.
In order to further improve the convenience of construction and reduce the size of a joint between two adjacent inner ring steel plates, in an embodiment, the inner ring steel plates are sequentially spliced end to end along the circumferential direction of the tunnel to assemble the supporting ring assembly, which specifically includes:
and S121, connecting and fixing first splicing plates of two inner ring steel plates adjacent to each other in the tunnel ring direction through bolts to form the supporting ring assembly.
In an embodiment, the step of sequentially splicing a target number of the support ring assemblies along the length direction of the tunnel by using the constructed support ring assemblies as a reference to form the concrete formwork specifically includes:
s211, connecting and fixing second splicing plates of two adjacent inner ring steel plates in the circumferential direction of the tunnel through bolts; and/or
And S212, fixing the abutted positions of the two inner ring steel plates adjacent to each other in the tunnel ring direction by welding.
In this embodiment, each inner ring steel plate has two opposite arc edges and two opposite side edges. The number of the first splicing plates can be two, and the two first splicing plates can be respectively arranged on two arc edges of the inner ring steel plate. The number of the second splicing plates can also be two, and the two second splicing plates can be respectively arranged on two side edges of the inner ring steel plate.
In order to ensure that the tunnel ring can be stably connected to the two adjacent inner ring steel plates, a combination of bolt connection and welding can be adopted to connect the abutting parts of the two adjacent inner ring steel plates respectively.
In order to facilitate the injection of concrete to further improve the construction convenience of the tunnel supporting structure, in an embodiment, the step of introducing concrete into the concrete form includes:
and step S31, injecting the concrete into a closed space between the inner ring steel plate and the inner wall of the tunnel through a grouting port.
In this embodiment, the inboard slip casting mouth of ring of accessible strut ring subassembly is leading-in concrete to the concrete form in, the operation is comparatively simple, and the construction degree of difficulty is lower relatively.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (11)
1. A construction method of a tunnel supporting structure is characterized by comprising the following steps:
sequentially splicing the inner ring steel plates along the circumferential direction of the tunnel to assemble a supporting ring assembly;
sequentially assembling supporting ring assemblies with target lengths along the length direction of the tunnel to form a concrete template;
and introducing concrete into the concrete template, and forming a steel plate-concrete combined segment structure after the concrete is hardened and formed so as to form a permanent supporting system of the tunnel surrounding rock.
2. The construction method of a tunnel supporting structure according to claim 1, wherein the step of assembling the supporting ring assembly by sequentially splicing the inner ring steel plates along the circumferential direction of the tunnel specifically comprises:
mounting a first inner ring steel plate on the inner wall of the tunnel;
and sequentially splicing the inner ring steel plates end to end along the circumferential direction of the tunnel to assemble the supporting ring assembly.
3. A method of constructing a tunnel supporting structure as claimed in claim 2, wherein the step of sequentially assembling supporting ring assemblies of a target length in a tunnel length direction to constitute a concrete form includes:
and sequentially splicing the supporting ring assemblies of the target number along the length direction of the tunnel by taking the constructed supporting ring assemblies as a reference so as to form the concrete template.
4. The construction method of a tunnel supporting structure according to claim 2, wherein the step of assembling the supporting ring assembly by sequentially splicing the inner ring steel plates end to end in the circumferential direction of the tunnel specifically comprises:
and connecting and fixing first splicing plates of two inner ring steel plates which are adjacent to each other in the circumferential direction of the tunnel through bolts to form the supporting ring assembly.
5. A method of constructing a tunnel supporting structure as claimed in claim 3, wherein said step of sequentially assembling a target number of said supporting ring assemblies along the length direction of the tunnel with reference to said supporting ring assemblies already constructed to form said concrete form includes:
connecting and fixing second splicing plates of two inner ring steel plates which are adjacent to each other in the circumferential direction of the tunnel through bolts; and/or
And the abutting positions of the two inner ring steel plates adjacent to each other in the tunnel ring direction are fixed by welding.
6. The method of constructing a tunnel supporting structure according to claim 1, wherein the step of introducing concrete into the concrete form includes:
and injecting the concrete into a closed space between the inner ring steel plate and the inner wall of the tunnel through a grouting opening.
7. A tunnel supporting structure formed by the tunnel supporting structure construction method according to any one of claims 1 to 6, wherein the tunnel supporting structure comprises:
the support ring assemblies are suitable for being arranged on the inner wall of the tunnel, a grouting cavity is formed between the support ring assemblies and the inner wall of the tunnel, the number of the support ring assemblies is at least one, and at least one support ring assembly is sequentially spliced along the length direction of the tunnel; and
and concrete is injected into the grouting cavity.
8. The tunnel support structure of claim 7, wherein each of the support ring assemblies includes:
each inner ring steel plate is arranged in an arch shape, and each inner ring steel plate is provided with at least one grouting opening; and the inner ring steel plates are sequentially spliced end to end along the circumferential direction of the tunnel.
9. The tunnel support structure of claim 8, wherein each of said inner ring steel plates has opposite arcuate sides and opposite side edges, each of said support ring assemblies further comprising:
the two arc edges of the inner ring steel plate are provided with the first splicing plates, and the two adjacent first splicing plates along the circumferential direction of the inner wall of the tunnel are fixedly connected through bolts; and
and the two sides of the inner ring steel plate are provided with the second splicing plates, and the two adjacent second splicing plates along the length direction of the inner wall of the tunnel are fixedly connected through bolts.
10. The tunnel supporting structure of claim 8, wherein each of the inner ring steel plates is provided with at least one first stiffening rib provided to extend in a circumferential direction of the inner ring steel plate and at least one second stiffening rib provided to extend in a width direction of the inner ring steel plate.
11. The tunnel support structure of claim 8, wherein each of the inner ring steel plates is provided with a plurality of shear connectors.
Priority Applications (1)
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| CN202111065943.9A CN113622959A (en) | 2021-09-10 | 2021-09-10 | Tunnel supporting structure and construction method thereof |
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| CN202111065943.9A CN113622959A (en) | 2021-09-10 | 2021-09-10 | Tunnel supporting structure and construction method thereof |
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| CN (1) | CN113622959A (en) |
Cited By (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114548573A (en) * | 2022-02-24 | 2022-05-27 | 苏州市普实软件有限公司 | Intelligent plate splicing method, terminal and storage medium |
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