CN220539641U - Convex inverted arch tunnel structure - Google Patents
Convex inverted arch tunnel structure Download PDFInfo
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- CN220539641U CN220539641U CN202322285235.7U CN202322285235U CN220539641U CN 220539641 U CN220539641 U CN 220539641U CN 202322285235 U CN202322285235 U CN 202322285235U CN 220539641 U CN220539641 U CN 220539641U
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- 230000008878 coupling Effects 0.000 claims description 19
- 238000010168 coupling process Methods 0.000 claims description 19
- 238000005859 coupling reaction Methods 0.000 claims description 19
- 239000004567 concrete Substances 0.000 abstract description 6
- 238000010276 construction Methods 0.000 description 15
- 238000009412 basement excavation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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Abstract
The utility model provides a convex inverted arch tunnel structure, and belongs to the technical field of tunnel engineering. It has solved the problem that current tunnel all adopted concave type inverted arch structure. This protruding inverted arch tunnel structure, including two be located the side wall of tunnel both sides respectively, be located the hunch portion on tunnel upper portion and be located the structural layer of tunnel lower part, the upper end and the hunch portion of side wall link to each other, and the side of structural layer is connected with the side wall respectively, is connected with the inverted arch that is located the structural layer below between two side walls, and the inverted arch is arch and high both sides in the middle of being low, is equipped with the filling layer between inverted arch and the structural layer. After the convex inverted arch structure is adopted, engineering investment can be reduced, inverted arch concrete pouring quality is guaranteed, settlement deformation capacity of the tunnel structure is optimized, maintainability of the tunnel inverted arch during operation is improved, and the tunnel structure has good stability and safety.
Description
Technical Field
The utility model belongs to the technical field of tunnel engineering, and relates to a convex inverted arch tunnel structure.
Background
The tunnel inverted arch is an arc-shaped structure arranged at the bottom of a tunnel and is one of main components of the tunnel structure, on one hand, the tunnel inverted arch needs to form a closed structure together with a tunnel arch wall to bear peripheral loads of the tunnel, and on the other hand, the tunnel inverted arch is used as a foundation of the tunnel structure to effectively transfer upper loads to a foundation. At present, tunnels at home and abroad all adopt concave inverted arch structures, namely tunnel bottom inverted arch structures are bent upwards, and the two sides are high and the middle is low.
The conventional concave tunnel inverted arch structure has the following disadvantages: 1. the tunnel bottom is deep, the bottom excavation square quantity is large, the inverted arch filling quantity is large, and the engineering investment is high. 2. The tunnel bottom is high at both sides and low in the middle, water is easily accumulated at the bottom, virtual slag is easily accumulated at the bottom, and the pouring construction quality of inverted arch concrete is not easily ensured. 3. The tunnel bottom inverted arch structure is bent upwards, the concave inverted arch structure is poor in sedimentation deformation resistance, and when the upper load is large or the tunnel substrate bearing capacity is poor, the tunnel structure is easy to deform and crack. 4. And if the inverted arch has quality problems, the concrete is required to be excavated firstly, then the inverted arch structure is reinforced, the excavated depth of the tunnel bottom is large, the construction risk is high, and the maintainability of the inverted arch of the tunnel during operation is poor.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides a convex inverted arch tunnel structure with good stability and safety.
The aim of the utility model can be achieved by the following technical scheme:
the utility model provides a protruding inverted arch tunnel structure, is including two side walls that are located the tunnel both sides respectively, be located the hunch portion on tunnel upper portion and be located the structural layer of tunnel lower part, the upper end and the hunch portion of side wall link to each other, the side of structural layer is connected with the side wall respectively, two be connected with the inverted arch that is located the structural layer below between the side wall, the inverted arch is arch and middle high both sides low, be equipped with the filling layer between inverted arch and the structural layer.
Because the inverted arch is bent downwards, the tunnel bottom is excavated shallow, the bottom excavation square quantity is small, the inverted arch filling quantity is small, and the engineering investment can be effectively saved; the middle of the inverted arch is high and two sides of the inverted arch are low, so that the tunnel bottom virtual slag can be cleaned conveniently, temporary ditches can be arranged on two sides of the inverted arch, accumulated water can be conveniently drained, and the pouring construction quality of the inverted arch is guaranteed; the inverted arch is bent downwards, when the tunnel bottom inverted arch bears upper load, part of vertical load is transferred to the substrate, and the other part of load is converted into horizontal load and transferred to two sides of the inverted arch, so that the tunnel structure has better settlement deformation resistance; the inverted arch backfill thickness is smaller, the inverted arch renovation tunnel bottom excavation thickness is small during operation, the inverted arch structure reinforcement construction risk can be reduced, and the tunnel inverted arch maintainability is good during operation. The filling layer adopts concrete backfill to be compact, and the structural layer is a reinforced concrete structure, so that the load of the upper pavement can be better transferred.
In the convex inverted arch tunnel structure, a first leaning surface is arranged on the inner side of the side wall, the side edge of the inverted arch adjacent to the first leaning surface is connected to the first leaning surface, and the tangent line of the contact part of the inverted arch and the first leaning surface is perpendicular to the first leaning surface. The force exerted by the inverted arch on the first abutting surface is perpendicular to the first abutting surface, and the bearing capacity is high.
In the above convex inverted arch tunnel structure, the bottom of the side wall is provided with a footing longitudinal beam, and the side edge of the inverted arch arranged adjacent to the footing longitudinal beam is connected to the footing longitudinal beam. The inverted arch can transfer horizontal load to the feet at two sides of the tunnel after bearing upper load, the tunnel bottom feet are required to have larger rigidity, and when the tunnel bottom geological conditions are worse, the tunnel bottom feet are provided with foot longitudinal beams.
In the convex inverted arch tunnel structure, a second leaning surface is arranged on the basement longitudinal beam, the joint of the inverted arch and the basement longitudinal beam is positioned on the second leaning surface, and the tangent line of the contact part of the inverted arch and the second leaning surface is perpendicular to the second leaning surface.
In the convex inverted arch tunnel structure, a first pile foundation is arranged at the lower part of the basement longitudinal beam. When the tunnel bottom has a thicker weak layer, the two sides of the tunnel bottom are provided with the basement longitudinal beams, the first pile foundations are arranged below the basement longitudinal beams, and upper load is transferred to the lower stable stratum through the first pile foundations.
In the above-mentioned protruding inverted arch tunnel structure, the inverted arch is at least two and sets gradually along tunnel width direction, is equipped with the connection longeron between two adjacent inverted arches, and the side of the inverted arch that sets up adjacent with the connection longeron is connected on the connection longeron.
When the tunnel span is larger, the tunnel can be arranged into a plurality of inverted arches, and the connecting longitudinal beam is used as a transverse force transfer system among the plurality of inverted arches at the tunnel bottom, so that the integral stress of the tunnel bottom structure is ensured.
In the convex inverted arch tunnel structure, a third leaning surface is arranged on the connecting longitudinal beam, the joint of the inverted arch and the connecting longitudinal beam is positioned on the third leaning surface, and the tangent line of the contact part of the inverted arch and the third leaning surface is perpendicular to the third leaning surface.
In the convex inverted arch tunnel structure, a second pile foundation is arranged at the lower part of the connecting longitudinal beam. When the tunnel bottom has a thicker soft layer, a first pile foundation is arranged below the basement longitudinal beam, a second pile foundation is arranged below the connecting longitudinal beam, and upper load is transferred to a lower stable stratum through the first pile foundation and the second pile foundation.
In the convex inverted arch tunnel structure, the inverted arch, the structural layer, the connecting longitudinal beam and the basement longitudinal beam are integrally formed. And the casting is performed on the construction site, assembly is not needed, all the components are fixedly connected, and the structural integrity is good.
In the convex inverted arch tunnel structure, the inverted arch, the structural layer, the connecting longitudinal beam and the basement longitudinal beam are prefabricated components. The prefabricated parts are prefabricated in factory standardization according to design specifications, the construction quality of the prefabricated parts is high, the construction period can be shortened, and the construction efficiency can be improved.
The construction process of the first pile foundation and the second pile foundation can adopt manual hole digging piles or drilling piles, and the section types of the first pile foundation and the second pile foundation are generally square or round. Usually, the bored pile is round, and the manual bored pile is square.
Compared with the prior art, the convex inverted arch tunnel structure has the following advantages:
the engineering investment is reduced, the inverted arch concrete pouring quality is guaranteed, the settlement deformation capacity of the tunnel structure is optimized, the maintainability of the tunnel inverted arch during operation is improved, and the tunnel structure has good stability and safety.
Drawings
Fig. 1 is a schematic structural diagram of a tunnel structure according to a first embodiment.
Fig. 2 is a schematic view of a tunnel structure according to the first embodiment.
Fig. 3 is a schematic structural diagram of a tunnel structure according to a second embodiment.
Fig. 4 is a schematic structural diagram of a tunnel structure provided in the third embodiment.
Fig. 5 is a schematic structural diagram of a tunnel structure provided in the fourth embodiment.
Fig. 6 is a schematic structural diagram of a tunnel structure provided in embodiment five.
In the figure, 1, side walls; 11. a first abutment surface; 2. an arch portion; 3. a structural layer; 4. inverted arch; 5. a filling layer; 6. a basement longitudinal beam; 61. a second abutment surface; 7. a first pile foundation; 8. connecting longitudinal beams; 81. a third abutment surface; 9. and a second pile foundation.
Detailed Description
The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.
Example 1
The convex inverted arch tunnel structure shown in fig. 1 and 2 comprises two side walls 1 symmetrically arranged at two sides of a tunnel, an arch part 2 positioned at the upper part of the tunnel and a structural layer 3 positioned at the lower part of the tunnel, wherein two side edges of the arch part 2 are respectively connected with the tops of different side walls 1. In order to better transfer the load of the upper pavement, the structural layer 3 is a reinforced concrete structure, and two side edges of the structural layer 3 are respectively connected with different side walls 1. The inverted arch 4 with two sides connected with the side wall 1 is arranged below the structural layer 3, as shown in fig. 1 and 2, a single arch structure is adopted in a narrow tunnel and a slightly wide tunnel, namely, only one inverted arch 4 is arranged, the inverted arch 4 is arched, the middle of the inverted arch 4 is high, the two sides of the inverted arch 4 are low, the inverted arch 4 is supported at the lower part of the structural layer 3, a filling layer 5 is arranged between the inverted arch 4 and the structural layer 3, and the filling layer 5 is filled with concrete in a dense manner.
Because the inverted arch 4 is bent downwards, the tunnel bottom is excavated shallow, the bottom excavation square quantity is small, the filling quantity of the inverted arch 4 is small, and the engineering investment can be effectively saved. The middle of the inverted arch 4 is high and two sides are low, so that virtual slag at the tunnel bottom can be cleaned conveniently, temporary ditches can be arranged at two sides, accumulated water can be drained conveniently, and pouring construction quality of the inverted arch 4 is guaranteed. The inverted arch 4 is bent downwards, when the tunnel bottom inverted arch 4 bears upper load, part of vertical load is transferred to the substrate, and other part of load is converted into horizontal load and transferred to two sides of the inverted arch 4, so that the tunnel structure has better settlement deformation resistance. The inverted arch 4 is small in backfill thickness, the inverted arch 4 is small in tunneling bottom excavation thickness during operation, the structural reinforcement construction risk of the inverted arch 4 can be reduced, and the maintainability of the tunnel inverted arch 4 during operation is good.
As shown in fig. 1 and 2, the inner side of the side wall 1 is provided with a first abutment surface 11, the two first abutment surfaces 11 are symmetrically arranged, the left side edge of the inverted arch 4 is connected to the first abutment surface 11 located on the left side, and the right side edge of the inverted arch 4 is connected to the first abutment surface 11 located on the right side. The tangent line of the inverted arch 4 where it contacts the first abutment surface 11 is perpendicular to the first abutment surface 11, i.e. the force exerted by the inverted arch 4 on the first abutment surface 11 is perpendicular to the first abutment surface 11, with a high load carrying capacity.
Example two
The structural principle of this embodiment is basically the same as that of the first embodiment, except that the inverted arch 4 will transfer horizontal load to the feet on both sides of the tunnel after bearing the upper load, requiring the tunnel bottom feet to have a large rigidity, and when the tunnel bottom geological condition is poor, the tunnel bottom feet are provided with the foot stringers 6.
Specifically, as shown in fig. 3, the bottom of the side wall 1 is provided with a footing longitudinal beam 6, the left side edge of the inverted arch 4 is connected to the footing longitudinal beam 6 located on the left side, and the right side edge of the inverted arch 4 is connected to the footing longitudinal beam 6 located on the right side. The wall foot longitudinal beam 6 is provided with a second leaning surface 61, the two second leaning surfaces 61 are symmetrically arranged, the left side edge of the inverted arch 4 is connected to the second leaning surface 61 positioned on the left side, the right side edge of the inverted arch 4 is connected to the second leaning surface 61 positioned on the right side, and the tangent line of the contact part of the inverted arch 4 and the second leaning surface 61 is perpendicular to the second leaning surface 61.
Example III
The structural principle of this embodiment is basically the same as that of the second embodiment, except that, as shown in fig. 4, when a tunnel bottom has a thicker weak layer, the two sides of the tunnel bottom are provided with the wall foot stringers 6, and the first pile foundation 7 is arranged under the wall foot stringers 6, so that the upper load is transferred to the lower stable stratum through the first pile foundation 7.
Example IV
The structural principle of the present embodiment is basically the same as that of the first embodiment, except that when the tunnel span is larger, the tunnel span can be set into multiple inverted arches 4, and a coupling longitudinal beam 8 is arranged between two adjacent inverted arches 4, and the coupling longitudinal beam 8 is used as a transverse force transmission system between multiple inverted arches 4 at the tunnel bottom, so that the integral stress of the tunnel bottom structure is ensured.
In this embodiment, as shown in fig. 5, a coupling girder 8 is provided between the two inverted arches 4, and the right side edge of the inverted arch 4 on the left side is connected to the coupling girder 8, and the left side edge of the inverted arch 4 on the right side is connected to the coupling girder 8.
As shown in fig. 5, the coupling girder 8 is provided with two third abutment surfaces 81 symmetrically arranged, the right side edge of the inverted arch 4 positioned on the left side is connected to the third abutment surface 81 positioned on the left side of the coupling girder 8, the left side edge of the inverted arch 4 positioned on the right side is connected to the third abutment surface 81 positioned on the right side of the coupling girder 8, and the tangent line at the contact point of the inverted arch 4 and the third abutment surface 81 is perpendicular to the third abutment surface 81.
Example five
The structural principle of this embodiment is basically the same as that of the fourth embodiment, except that when a tunnel bottom has a thicker weak layer, the two sides of the tunnel bottom are provided with the basement longitudinal beam 6, the first pile foundation 7 is arranged under the basement longitudinal beam 6, the second pile foundation 9 is arranged under the coupling longitudinal beam 8, and the upper load is transferred to the lower stable stratum through the first pile foundation 7 and the second pile foundation 9.
In this embodiment, the inverted arch 4, the structural layer 3, the coupling stringers 8 and the footing stringers 6 are integrally formed, that is, they are cast in situ, without assembly, and the components are consolidated, so that the structural integrity is good.
In some other embodiments, the inverted arch 4, the structural layer 3, the coupling stringers 8 and the footing stringers 6 are prefabricated components, which are prefabricated in factory standardization according to design specifications, and the prefabricated components have high construction quality, so that the construction period can be shortened, and the construction efficiency can be improved.
The construction process of the first pile foundation 7 and the second pile foundation 9 can adopt manual hole digging piles or drilling piles, and the section types of the first pile foundation 7 and the second pile foundation 9 are generally square or round.
Usually, the bored pile is round, and the manual bored pile is square.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Claims (10)
1. The utility model provides a protruding inverted arch tunnel structure, includes two side walls (1) that are located the tunnel both sides respectively, is located hunch portion (2) on tunnel upper portion and is located structural layer (3) of tunnel lower part, the upper end and the hunch portion (2) of side wall (1) link to each other, the side of structural layer (3) is connected with side wall (1) respectively, two be connected with inverted arch (4) that are located structural layer (3) below between side wall (1), inverted arch (4) are arch and high both sides in the middle are low, be equipped with filling layer (5) between inverted arch (4) and structural layer (3).
2. The convex inverted arch tunnel structure according to claim 1, wherein a first abutment surface (11) is provided on the inner side of the side wall (1), the side edge of the inverted arch (4) provided adjacent to the first abutment surface (11) is connected to the first abutment surface (11), and a tangent line at a contact point of the inverted arch (4) with the first abutment surface (11) is perpendicular to the first abutment surface (11).
3. The convex inverted arch tunnel structure according to claim 1, wherein the bottom of the side wall (1) is provided with a footing stringer (6), and the side edge of the inverted arch (4) arranged adjacent to the footing stringer (6) is connected to the footing stringer (6).
4. A male inverted arch tunnel structure according to claim 3, wherein the corner stringers (6) are provided with a second abutment surface (61), the junction of the inverted arch (4) with the corner stringers (6) being located on the second abutment surface (61), the tangent line of the junction of the inverted arch (4) with the second abutment surface (61) being perpendicular to the second abutment surface (61).
5. A male inverted arch tunnel structure according to claim 3 or 4, wherein the lower part of the basement stringers (6) is provided with a first pile foundation (7).
6. A male inverted arch tunnel structure according to claim 3, wherein at least two inverted arches (4) are provided in sequence in the tunnel width direction, a coupling longitudinal beam (8) is provided between two adjacent inverted arches (4), and the side edges of the inverted arches (4) provided adjacent to the coupling longitudinal beam (8) are connected to the coupling longitudinal beam (8).
7. The convex inverted arch tunnel structure according to claim 6, wherein a third abutment surface (81) is provided on the coupling stringer (8), a junction of the inverted arch (4) and the coupling stringer (8) is located on the third abutment surface (81), and a tangent line of a contact of the inverted arch (4) and the third abutment surface (81) is perpendicular to the third abutment surface (81).
8. The male inverted arch tunnel structure according to claim 6, wherein the lower part of the coupling stringers (8) is provided with a second pile foundation (9).
9. The convex inverted arch tunnel structure according to claim 6, wherein the inverted arch (4), the structural layer (3), the coupling stringers (8) and the footing stringers (6) are integrally formed.
10. The male inverted arch tunnel structure according to claim 6, wherein the inverted arch (4), the structural layer (3), the coupling stringers (8) and the footer stringers (6) are prefabricated components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322285235.7U CN220539641U (en) | 2023-08-24 | 2023-08-24 | Convex inverted arch tunnel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322285235.7U CN220539641U (en) | 2023-08-24 | 2023-08-24 | Convex inverted arch tunnel structure |
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| Publication Number | Publication Date |
|---|---|
| CN220539641U true CN220539641U (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322285235.7U Active CN220539641U (en) | 2023-08-24 | 2023-08-24 | Convex inverted arch tunnel structure |
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|---|---|
| CN (1) | CN220539641U (en) |
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2023
- 2023-08-24 CN CN202322285235.7U patent/CN220539641U/en active Active
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