CN113622958A - Tunnel supporting structure and construction method thereof - Google Patents
Tunnel supporting structure and construction method thereof Download PDFInfo
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- CN113622958A CN113622958A CN202111065942.4A CN202111065942A CN113622958A CN 113622958 A CN113622958 A CN 113622958A CN 202111065942 A CN202111065942 A CN 202111065942A CN 113622958 A CN113622958 A CN 113622958A
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- 238000010276 construction Methods 0.000 title claims abstract description 53
- 239000004567 concrete Substances 0.000 claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims description 170
- 239000010959 steel Substances 0.000 claims description 170
- 239000003351 stiffener Substances 0.000 claims description 24
- 230000000712 assembly Effects 0.000 claims description 15
- 238000000429 assembly Methods 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 7
- 230000002708 enhancing effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 239000011376 self-consolidating concrete Substances 0.000 description 4
- 238000009415 formwork Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 230000005641 tunneling Effects 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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- 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 at least one duct piece ring assembly and concrete, the duct piece ring assembly is suitable for being arranged on the inner wall of a tunnel, the duct piece ring assembly comprises an inner ring supporting assembly and an outer ring supporting assembly, and the inner ring supporting assembly is connected with the outer ring supporting assembly and encloses to form a grouting cavity; and concrete is injected into the grouting cavity. The tunnel supporting structure provided by the invention is suitable for TBM construction, the mounting convenience of the supporting structure is improved, the stress performance is improved, and the safety risk of tunnel construction is reduced.
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
In tunnel engineering construction, TBM (Tunnel Boring machine) construction has the characteristics of high automation degree, high construction speed, manpower saving, safety and economy, and is widely tried and applied to large tunnel engineering.
The segment structure suitable for tunneling of the deep-buried tunnel TBM is a great technical difficulty, the existing tunnel engineering supporting structure mostly adopts reinforced concrete segments, the supporting structure is complex, and the construction difficulty is relatively high.
Disclosure of Invention
The invention mainly aims to provide a tunnel supporting structure and a construction method thereof, aiming at improving the construction convenience of the tunnel supporting structure.
In order to achieve the above object, the present invention provides a tunnel supporting structure, including:
the pipe piece ring assembly is suitable for being arranged on the inner wall of a tunnel and comprises an inner ring supporting assembly and an outer ring supporting assembly, and the inner ring supporting assembly is connected with the outer ring supporting assembly and encloses to form a grouting cavity; and
and concrete is injected into the grouting cavity.
Optionally, the inner ring supporting assembly comprises a plurality of inner ring steel plates, and the inner ring steel plates are sequentially spliced along the circumferential direction of the tunnel;
the outer ring supporting assembly comprises a plurality of outer ring steel plates which are sequentially spliced along the circumferential direction of the tunnel;
wherein, polylith interior ring steel sheet is fixed with polylith outer loop steel sheet one-to-one connection.
Optionally, the inner ring steel plate is provided with a grouting port communicated with the grouting cavity.
Optionally, each inner ring steel plate is arranged in an arch shape and is provided with two opposite arc edges and two opposite side edges;
the inner ring support assembly further comprises:
the inner ring splice plates are arranged on two side edges of the inner ring steel plate, and the two adjacent inner ring splice plates in the tunnel ring direction are spliced with each other.
Optionally, the inner ring support assembly further comprises:
and the inner ring stiffening rib is arranged on the inner ring steel plate and used for enhancing the bending rigidity of the inner ring steel plate.
Optionally, the number of the inner ring stiffening ribs is multiple, the multiple groups of inner ring stiffening ribs are uniformly distributed at intervals along the width direction of the inner ring steel plate, and two groups of inner ring stiffening ribs are respectively arranged on two arc edges of the inner ring steel plate;
each group of the inner ring stiffening ribs comprises a plurality of the inner ring stiffening ribs which are uniformly distributed along the circumferential direction of the inner ring steel plate at intervals.
Optionally, each outer ring steel plate is arranged in an arch shape and is provided with two opposite arc edges and two opposite side edges;
the outer ring support assembly further comprises:
the outer ring splicing plates are arranged on the side edges of the outer ring steel plates, and the annular direction of the tunnel is adjacent to the two outer ring splicing plates which are spliced with each other.
Optionally, the outer ring support assembly further comprises:
the web plate is arranged on the outer ring steel plate and extends along the radial direction of the tunnel; and
and the radial splicing plates are arranged at the end parts of the webs, and the radial splicing plates are fixedly connected with the inner ring steel plate.
Optionally, the number of the webs is two, and the two webs are arranged on the outer ring steel plate at intervals.
Optionally, the outer ring support assembly further comprises:
and the outer ring stiffening rib is arranged on the outer ring steel plate and used for enhancing the bending rigidity of the outer ring steel plate.
Optionally, the number of the outer ring stiffening ribs is multiple, the multiple groups of outer ring stiffening ribs are uniformly distributed at intervals along the width direction of the outer ring steel plate, and two groups of outer ring stiffening ribs are respectively arranged on two arc edges of the outer ring steel plate;
each group of outer ring stiffening ribs comprises a plurality of outer ring stiffening ribs which are uniformly distributed along the circumferential direction of the outer ring steel plate at intervals.
Optionally, two adjacent outer ring steel plates in the length direction of the tunnel are fixed by welding, and two adjacent outer ring steel plates in the circumferential direction of the tunnel are fixed by bolts;
two adjacent inner ring steel plates along the length direction of the tunnel are fixed by welding, and two adjacent inner ring steel plates along the circumferential direction of the tunnel are fixed by bolts; the inner ring steel plate and the outer ring steel plate which is opposite to the inner ring steel plate in the radial direction are fixedly connected through bolts.
Optionally, a shear connector is arranged on the outer ring steel plate and/or the inner ring steel plate.
Optionally, in the length direction of the tunnel, two adjacent segment ring assemblies are spliced in a staggered manner.
Optionally, the phase difference between two adjacent supporting ring assemblies is 10-50 degrees.
Optionally, the number of segment ring assemblies is 6, and each segment ring assembly has 6 inner ring steel plates and 6 outer ring steel plates.
In order to achieve the above object, the present invention further provides a construction method of a tunnel supporting structure, based on the tunnel supporting structure, including the following steps:
sequentially splicing a plurality of outer ring steel plates along the circumferential direction of the tunnel, sequentially splicing a plurality of inner ring steel plates along the circumferential direction of the tunnel, and connecting and fixing the inner ring steel plates and the outer ring steel plates in a one-to-one connection manner to assemble the segment ring assembly;
and injecting the concrete into the grouting cavity, and forming a steel plate-concrete combined segment structure after the concrete is hardened and formed.
Optionally, after the step of sequentially splicing the plurality of outer ring steel plates in the circumferential direction of the tunnel, and then sequentially splicing the plurality of inner ring steel plates in the circumferential direction of the tunnel and connecting and fixing the inner ring steel plates and the plurality of outer ring steel plates in a one-to-one manner, so as to assemble the segment ring assembly, the method further includes:
and continuously splicing the segment ring assembly of the next pass by taking the constructed segment ring assembly as a reference so as to assemble the segment ring assembly with the target length and form a concrete template.
According to the technical scheme, the tunnel supporting structure comprises at least one duct piece ring assembly and concrete, wherein the duct piece ring assembly is suitable for being arranged on the inner wall of a tunnel and comprises an inner ring supporting assembly and an outer ring supporting assembly, and the inner ring supporting assembly is connected with the outer ring supporting assembly and is surrounded to form a grouting cavity; and concrete is injected into the grouting cavity. It can be understood that, during construction, the inner ring supporting assembly and the outer ring supporting assembly can be respectively installed on the inner wall of the tunnel, then concrete is injected into the grouting cavity, and the supporting structure can be completed by adopting sectional construction, so that the construction convenience 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 structural view of an outer ring steel plate in an embodiment of the tunnel supporting structure of the present invention;
fig. 5 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:
10. a segment ring assembly; 20. concrete; 11. an inner ring support assembly; 12. an outer ring support assembly; 110. an inner ring steel plate; 111. an inner ring stiffener; 112. an inner ring splice plate; 120. an outer ring steel plate; 121. an outer ring stiffener; 122. an outer ring splice plate; 123. a web; 124. a shear connector; 125. and (4) radial splicing plates.
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 without limitation.
Referring to fig. 1 and 2, in an embodiment of the present invention, the tunnel supporting structure includes at least one segment ring assembly 10 and concrete 20, the segment ring assembly 10 is adapted to be disposed on the inner wall of the tunnel, the segment ring assembly 10 includes an inner ring supporting assembly 11 and an outer ring supporting assembly 12, the inner ring supporting assembly 11 is connected with the outer ring supporting assembly 12 and encloses to form a grouting cavity; concrete 20 is injected into the grouting cavity.
In this embodiment, the concrete form is enclosed by an inner ring support assembly 11 and an outer ring support assembly 12, which may include one or more segment ring assemblies 10, and may be selected in a reasonable number according to the length of the target construction segment, and the length of the tunnel support structure is not limited herein.
In this embodiment, the inner ring supporting component 11 and the outer ring supporting component 12 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 shape or an arch shape, the space between the inner ring supporting component 11 and the outer ring supporting component 12 is a grouting cavity, and the grouting cavity may be disposed in an annular shape or an arch shape, which is not limited herein.
The concrete 20 in the present embodiment may be self-compacting concrete, ordinary concrete, or the like, and is not particularly limited herein.
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 at least one duct piece ring assembly 10 and concrete 20, wherein the duct piece ring assembly 10 is suitable for being arranged on the inner wall of a tunnel, the duct piece ring assembly 10 comprises an inner ring supporting assembly 11 and an outer ring supporting assembly 12, and the inner ring supporting assembly 11 is connected with the outer ring supporting assembly 12 and encloses to form a grouting cavity; concrete 20 is injected into the grouting cavity. It can be understood that, during construction, the inner ring supporting assembly 11 and the outer ring supporting assembly 12 can be respectively installed on the inner wall of the tunnel, and then the concrete 20 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. Moreover, the tunnel supporting structure is applicable to TBM construction, and has good stress performance and wide application prospect.
It is worth mentioning that the supporting structure can ensure that the deformation under the rock burst load impact meets the construction safety requirement, and the safety of tunnel engineering construction is improved to a certain extent.
To further improve the construction convenience of the tunnel supporting structure, in an embodiment, referring to fig. 1 to 4, the inner ring supporting assembly 11 may include a plurality of inner ring steel plates 110, and the plurality of inner ring steel plates 110 are sequentially spliced in a circumferential direction of the tunnel. The outer ring supporting component 12 can comprise a plurality of outer ring steel plates 120, and the plurality of outer ring steel plates 120 are sequentially spliced along the circumferential direction of the tunnel; wherein, a plurality of inner ring steel plates 110 and a plurality of outer ring steel plates 120 are connected and fixed one by one.
In this embodiment, because inner ring support subassembly 11 and outer ring support subassembly 12 all adopt the mode of polylith steel sheet concatenation, can transport the steel sheet in the tunnel, then install inner ring support subassembly 11 and outer ring support subassembly 12 in proper order, can greatly promote the efficiency of construction, shorten construction cycle, also can make things convenient for the loading transportation simultaneously.
Referring to fig. 1 and 2, in some embodiments, the inner ring steel plate 110 may be provided with a grouting port communicating with the grouting cavity for introducing the concrete 20 into the grouting cavity. So, can improve the efficiency of construction, reduce tunnel supporting construction's construction cycle.
In order to reduce the gap between two adjacent inner ring steel plates 110, improve the waterproof performance of the tunnel supporting structure, and facilitate the construction, in some embodiments, referring to fig. 1 to 3, each inner ring steel plate 110 may be disposed in an arch shape and have two opposite arc sides and two opposite side edges. As shown in fig. 3, the inner ring supporting assembly 11 may further include two inner ring splicing plates 112, the two inner ring splicing plates 112 are respectively disposed on two side edges of the inner ring steel plate 110, and the two adjacent inner ring splicing plates 112 of the tunnel ring are spliced with each other.
In this embodiment, the connection manner between two adjacent inner ring splicing plates 112 may be bolt connection, screw connection, rivet connection, or welding, or a combination of two or more connection manners, which is not limited herein.
Further, in an embodiment, as shown in fig. 3, the inner ring supporting assembly may further include an inner ring stiffener 111, and the inner ring stiffener 111 is disposed on the inner ring steel plate 110 for enhancing the bending rigidity thereof.
In this embodiment, the number of the inner ring stiffeners 111 is multiple, the multiple groups of inner ring stiffeners 111 are uniformly arranged at intervals along the width direction of the inner ring steel plate 110, and two groups of inner ring stiffeners 111 are respectively arranged on two arc sides of the inner ring steel plate 110; each set of inner-ring stiffeners 111 includes a plurality of inner-ring stiffeners 111, and the plurality of inner-ring stiffeners 111 are evenly arranged at intervals in the circumferential direction of the inner-ring steel plate 110. By the arrangement, the inner ring steel plate 110 can meet the stress requirement, and the stress performance of the whole supporting structure is greatly improved.
For the same purpose, in some embodiments, as shown in fig. 4, each outer ring steel plate 120 may also be arched and have two opposite arc sides and two opposite side edges. The outer ring supporting assembly 12 may include outer ring splicing plates 122, the outer ring splicing plates 122 are disposed on the side of the outer ring steel plate 120, and the tunnel ring is spliced to two adjacent outer ring splicing plates 122.
It should be further noted that, in this embodiment, the connection manner between two adjacent outer ring splicing plates 122 may also be bolt connection, screw connection, rivet connection, or welding, and the like, and may also be a combination of two or more connection manners, which is not limited herein.
In order to achieve the connection between the inner ring steel plate 110 and the outer ring steel plate 120 and improve the radial rigidity of the whole structure, in an embodiment, referring to fig. 1 and fig. 2, the outer ring support assembly 12 may further include a web 123 and a radial splice plate 125, the web 123 is disposed on the outer ring steel plate 120 and extends along the radial direction of the tunnel, the radial splice plate 125 is disposed at an end of the web 123, and the web 123 and the inner ring steel plate 110 are connected and fixed by the radial splice plate 125.
In this embodiment, the web 123 and the outer ring steel plate 120 may be integrally formed, and may also be connected and fixed by welding, screwing, riveting, or the like, and the radial splice plate 125 and the web 123 may also be integrally formed, and may also be connected and fixed by welding, screwing, riveting, or the like, which is not limited herein. In this embodiment, the radial splice plates 125 and the inner ring steel plate 110 may be preferably bolted together, so as to facilitate disassembly and assembly and improve the construction efficiency.
In order to facilitate the assembly of the segment ring assembly 10 and improve the construction efficiency, in some embodiments, referring to fig. 1 and 2, two outer ring steel plates 120 adjacent to each other in the tunnel length direction may be fixed by welding, and two outer ring steel plates 120 adjacent to each other in the tunnel circumferential direction may also be fixed by bolts. Two adjacent inner ring steel plates 110 along the length direction of the tunnel can be connected and fixed through welding, and two adjacent inner ring steel plates 110 along the circumferential direction of the tunnel can also be connected and fixed through bolts; the inner ring steel plate 110 and the radially opposite outer ring steel plate 120 are fixed by bolting.
Further, as shown in fig. 4, in this embodiment, the number of the webs 123 may be two, and the two webs 123 are disposed on the outer ring steel plate 120 at intervals, so as to further enhance the radial rigidity of the overall structure and enhance the reliability of the entire supporting structure.
Of course, in some other embodiments, fewer or more webs 123 may be disposed on the outer ring steel plate 120, and the present invention is not limited thereto.
In order to increase the bending rigidity of the tunnel supporting structure, so as to improve the force-bearing performance and make it have better anti-rock-burst performance, in an embodiment, as shown in fig. 4, the outer ring supporting component 12 may further include an outer ring stiffening rib 121, and the outer ring stiffening rib 121 is disposed on the outer ring steel plate 120 for enhancing the bending rigidity thereof.
In this embodiment, the outer ring steel plate 120 is provided with at least one outer ring stiffener 121, and the inner ring steel plate 110 may also be provided with at least one inner ring stiffener 111, which is not limited herein.
In this embodiment, as shown in fig. 4, the number of the outer ring stiffeners 121 may be multiple groups, the multiple groups of outer ring stiffeners 121 are uniformly arranged along the width direction of the outer ring steel plate 120 at intervals, and two groups of outer ring stiffeners 121 are respectively disposed on two arcs of the outer ring steel plate 120; each set of outer ring stiffeners 121 includes a plurality of outer ring stiffeners 121, and the plurality of outer ring stiffeners 121 are uniformly arranged along the circumferential direction of the outer ring steel plate 120 at intervals. By the arrangement, better stress performance can be achieved.
In order to improve the stability of the riser segment unit during the construction stage and the overall performance of the combined segment structure during the use stage, and to provide better anti-rock burst performance, in an embodiment, referring to fig. 3 and 4, the outer ring steel plate 120 and/or the inner ring steel plate 110 are provided with a shear connector 124.
The shear connector 124 may be a stud, etc., but is not limited thereto.
Referring primarily to fig. 2, in some embodiments, two adjacent segment ring assemblies 10 are assembled together at a staggered position 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 the construction period, the tunnel supporting structure may adopt a segmental construction method, and preferably, referring to fig. 2, the number of segment ring assemblies 10 may be 6, and each segment ring assembly 10 has 6 inner ring steel plates 110 and 6 outer ring steel plates 120.
Of course, in some other embodiments, the tunnel supporting structure may also use fewer or more segment ring assemblies 10, and each segment ring assembly 10 may use fewer or more inner ring steel plates 110 and outer ring steel plates 120, which may be designed to be suitable for the tunnel size in actual construction.
In this embodiment, the phase difference between two adjacent pipe sheet ring assemblies 10 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 °, and the distance between two webs 123 is equal to twice the distance between each web 123 and the side edge of the outer ring steel plate 120 adjacent to the web 123, 12 connected grouting cavities can be formed, so that the concrete can sufficiently flow in the grouting cavities after being injected, and the supporting structure can achieve better stability.
The invention further provides a construction method of the tunnel supporting structure, and the construction method of the tunnel supporting structure is based on the tunnel supporting structure.
Referring to fig. 5, in an embodiment of the present invention, the construction method of the tunnel supporting structure includes the steps of:
s10, sequentially splicing the outer ring steel plates along the circumferential direction of the tunnel, sequentially splicing the inner ring steel plates along the circumferential direction of the tunnel, and connecting and fixing the inner ring steel plates and the outer ring steel plates in a one-to-one connection manner to assemble the segment ring assembly;
and S20, injecting the concrete into the grouting cavity, and forming a steel plate-concrete combined segment structure after the concrete is hardened and formed.
During construction, a plurality of inner ring steel plates, outer ring steel plates and other components can be transported to a construction site, and when the plurality of inner ring steel plates and the plurality of outer ring steel plates are sequentially installed, the inner ring steel plates and the outer ring steel plates can be sequentially spliced in the anticlockwise direction or the clockwise direction to assemble a segment ring assembly; of course, in order to shorten the construction period, the segment ring assembly may be assembled by performing construction from two or more positions at the same time. And then, mounting the segment ring assemblies of the target number on the basis of the constructed segment ring assemblies so as to achieve the concrete formwork of the target length, namely completing the assembly of the support structure framework.
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. Similarly, the connection mode between the outer 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 modes, which is not limited herein.
It should be noted that concrete can be introduced into the closed space between the inner ring steel plate and the outer ring steel plate, i.e. the grouting cavity, from the grouting opening at the inner side of the ring. In this embodiment, the concrete may be ordinary concrete or self-compacting concrete, and is not limited herein.
Further, after the step of sequentially splicing the plurality of outer ring steel plates in the circumferential direction of the tunnel, sequentially splicing the plurality of inner ring steel plates in the circumferential direction of the tunnel and connecting and fixing the inner ring steel plates and the plurality of outer ring steel plates in a one-to-one manner so as to assemble the segment ring assembly, the method may further include:
and step S11, continuously splicing the segment ring assembly of the next path by taking the constructed segment ring assembly as a reference so as to assemble the segment ring assembly of the target length and form the concrete template.
In this embodiment, the outer ring steel plate and the outer ring steel plate of the existing segment ring assembly can be welded or fixedly connected with the tunnel concrete structure, and then the inner ring steel plate is sequentially connected with the inner ring steel plate of the existing segment ring assembly through bolts and is connected with the outer ring steel plate through bolts. Then, the outer ring steel plate is sequentially connected with the outer ring steel plate of the outer ring supporting assembly through bolts, the outer ring steel plate is welded with the outer ring steel plate of the existing segment ring assembly, the inner ring steel plate is sequentially connected with the inner ring steel plate of the existing segment ring assembly through bolts, the outer ring steel plate is connected with the bolts, and the inner ring steel plate of the inner ring supporting assembly is connected with the annular bolts. And then, sequentially positioning and installing the segment ring assemblies with the target number to finish the installation of the concrete formwork.
It should be noted that when no supporting structure exists in the last construction section, the segment ring assembly can be directly built in the last construction section without positioning, the first segment ring assembly can be installed by erecting a scaffold, and then the positioning and installation of the residual segment ring assemblies are carried out.
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 (18)
1. A tunnel supporting structure, characterized in that the tunnel supporting structure includes:
the pipe piece ring assembly is suitable for being arranged on the inner wall of a tunnel and comprises an inner ring supporting assembly and an outer ring supporting assembly, and the inner ring supporting assembly is connected with the outer ring supporting assembly and encloses to form a grouting cavity; and
and concrete is injected into the grouting cavity.
2. The tunnel support structure of claim 1, wherein the inner ring support assembly comprises a plurality of inner ring steel plates, and the inner ring steel plates are sequentially spliced along the circumferential direction of the tunnel;
the outer ring supporting assembly comprises a plurality of outer ring steel plates which are sequentially spliced along the circumferential direction of the tunnel;
wherein, polylith interior ring steel sheet is fixed with polylith outer loop steel sheet one-to-one connection.
3. The tunnel supporting structure of claim 2, wherein the inner ring steel plate is provided with a grouting port communicating with the grouting cavity.
4. The tunnel support structure of claim 2, wherein each of the inner ring steel plates is arched and has two opposite arc sides and two opposite side edges;
the inner ring support assembly further comprises:
the inner ring splice plates are arranged on two side edges of the inner ring steel plate, and the two adjacent inner ring splice plates in the tunnel ring direction are spliced with each other.
5. The tunnel support structure of claim 4, wherein the inner ring support assembly further comprises:
and the inner ring stiffening rib is arranged on the inner ring steel plate and used for enhancing the bending rigidity of the inner ring steel plate.
6. The tunnel supporting structure of claim 5, wherein the number of the inner ring stiffeners is plural groups, the plural groups of the inner ring stiffeners are evenly arranged at intervals along the width direction of the inner ring steel plate, and two groups of the inner ring stiffeners are respectively arranged on two arc sides of the inner ring steel plate;
each group of the inner ring stiffening ribs comprises a plurality of the inner ring stiffening ribs which are uniformly distributed along the circumferential direction of the inner ring steel plate at intervals.
7. The tunnel support structure of claim 2, wherein each of the outer ring steel plates is arched and has two opposite arc sides and two opposite side edges;
the outer ring support assembly further comprises:
the outer ring splicing plates are arranged on the side edges of the outer ring steel plates, and the annular direction of the tunnel is adjacent to the two outer ring splicing plates which are spliced with each other.
8. The tunnel support structure of claim 7, wherein the outer ring support assembly further comprises:
the web plate is arranged on the outer ring steel plate and extends along the radial direction of the tunnel; and
and the radial splicing plates are arranged at the end parts of the webs, and the radial splicing plates are fixedly connected with the inner ring steel plate.
9. The tunnel support structure of claim 8 wherein said webs are two in number and are spaced apart from one another on said outer ring of steel plates.
10. The tunnel support structure of claim 8, wherein the outer ring support assembly further comprises:
and the outer ring stiffening rib is arranged on the outer ring steel plate and used for enhancing the bending rigidity of the outer ring steel plate.
11. The tunnel supporting structure of claim 9, wherein the number of the outer ring stiffeners is plural groups, the plural groups of the outer ring stiffeners are arranged at regular intervals in the width direction of the outer ring steel plate, and two groups of the outer ring stiffeners are arranged on both arc sides of the outer ring steel plate;
each group of outer ring stiffening ribs comprises a plurality of outer ring stiffening ribs which are uniformly distributed along the circumferential direction of the outer ring steel plate at intervals.
12. The tunnel supporting structure of claim 7, wherein two of the outer ring steel plates adjacent in the length direction of the tunnel are fixed by welding, and two of the outer ring steel plates adjacent in the circumferential direction of the tunnel are fixed by bolting;
two adjacent inner ring steel plates along the length direction of the tunnel are fixed by welding, and two adjacent inner ring steel plates along the circumferential direction of the tunnel are fixed by bolts; the inner ring steel plate and the outer ring steel plate which is opposite to the inner ring steel plate in the radial direction are fixedly connected through bolts.
13. The tunnel support structure of claim 7, wherein the outer ring steel plate and/or the inner ring steel plate is provided with a shear connector.
14. A tunnel support structure as claimed in any one of claims 2 to 11, wherein adjacent segment ring assemblies are in a staggered configuration along the length of the tunnel.
15. A tunnel support structure as claimed in claim 14, wherein adjacent support ring assemblies are out of phase by 10 ° to 50 °.
16. The tunnel support structure of claim 15, wherein the number of segment ring assemblies is 6, and each segment ring assembly has 6 inner ring steel plates and 6 outer ring steel plates.
17. A construction method of a tunnel supporting structure based on the tunnel supporting structure according to any one of claims 2 to 16, comprising the steps of:
sequentially splicing a plurality of outer ring steel plates along the circumferential direction of the tunnel, sequentially splicing a plurality of inner ring steel plates along the circumferential direction of the tunnel, and connecting and fixing the inner ring steel plates and the outer ring steel plates in a one-to-one connection manner to assemble the segment ring assembly;
and injecting the concrete into the grouting cavity, and forming a steel plate-concrete combined segment structure after the concrete is hardened and formed.
18. A tunnel supporting structure construction method as claimed in claim 17, wherein after the step of sequentially splicing the plurality of outer ring steel plates in the circumferential direction of the tunnel, sequentially splicing the plurality of inner ring steel plates in the circumferential direction of the tunnel and fixing the inner ring steel plates and the plurality of outer ring steel plates in a one-to-one connection to assemble the segment ring assembly, the method further comprises:
and continuously splicing the segment ring assembly of the next pass by taking the constructed segment ring assembly as a reference so as to assemble the segment ring assembly with the target length and form a concrete template.
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