CN215669536U - Tunnel foundation pit safety reinforcing structure for crossing existing subway lining - Google Patents
Tunnel foundation pit safety reinforcing structure for crossing existing subway lining Download PDFInfo
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- CN215669536U CN215669536U CN202120978424.0U CN202120978424U CN215669536U CN 215669536 U CN215669536 U CN 215669536U CN 202120978424 U CN202120978424 U CN 202120978424U CN 215669536 U CN215669536 U CN 215669536U
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- existing subway
- lining
- foundation pit
- tunnel foundation
- end walls
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- 230000003014 reinforcing effect Effects 0.000 title abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 78
- 239000010959 steel Substances 0.000 claims abstract description 78
- 230000002787 reinforcement Effects 0.000 claims description 11
- 238000005728 strengthening Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000009412 basement excavation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 239000010454 slate Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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
- 239000002689 soil Substances 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
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Abstract
The utility model provides a tunnel foundation pit safety reinforcing structure for crossing an existing subway lining, which comprises at least two end walls, at least one layer of steel pipe row and a working well, wherein the end walls are arranged along the extending direction of the existing subway, the end walls are oppositely arranged on two sides of the existing subway lining, the steel pipe row is fixedly connected between the two end walls, the working well is arranged on the outer side of the end walls, and the bottom of the working well is lower than the bottom of the tunnel foundation pit so as to facilitate the construction of the steel pipe row. Through setting up the steel pipe row between tunnel foundation ditch and existing subway lining, can resist existing subway lining's uplift effectively, simple structure simultaneously can also reduce cost effectively when guaranteeing to strut the effect to ensure tunnel foundation ditch in the work progress existing subway lining's safety and normal operation.
Description
Technical Field
The utility model relates to the technical field of tunnel engineering, in particular to a tunnel foundation pit safety reinforcing structure for crossing an existing subway lining.
Background
When underground tunnels are constructed in cities, how to reduce the influence of tunnel excavation on the surrounding environment is a very important problem. Municipal tunnels are generally shallow in buried depth, open excavation method is generally adopted for construction, as open excavation section pipelines and building materials are more, the problem that foundation pit engineering is located above an operated subway interval tunnel can occur, unloading of tunnel foundation pit excavation tends to cause subway lining uplift, as operated subway vehicles are extremely sensitive to deformation of the tunnel, and the subway tunnel has extremely strict requirements on deformation.
The existing municipal tunnel foundation pit is usually reinforced by grouting vertical rock mass (the reinforcing range is 1m when entering a weathered rock stratum), the distance between a reinforcing body and the existing subway lining is kept to be about 1.5m, so that the existing lining structure is prevented from being reinforced and damaged, the manufacturing cost of the scheme is too high, the construction effect is difficult to guarantee, and the key is that how to adopt effective measures to control the bulging deformation of the existing subway lining is particularly important, so that the safety and the normal operation of the subway lining in the foundation pit construction process are ensured.
In view of the above, it is necessary to provide a safety reinforcement structure for a tunnel foundation pit spanning an existing subway lining to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a tunnel foundation pit safety reinforcing structure for crossing an existing subway lining, and aims to solve the problems that the existing municipal tunnel foundation pit usually adopts grouting to reinforce a vertical rock body, a reinforcing body keeps a preset safety distance from the existing subway lining, but the construction cost is too high, the construction effect is difficult to guarantee, and the safety and normal operation of the existing subway lining are influenced.
In order to achieve the aim, the utility model provides a tunnel foundation pit safety reinforcement structure for crossing an existing subway lining, wherein the tunnel foundation pit is arranged above the existing subway lining and comprises at least two end walls, at least one layer of steel pipe row and a working well; wherein,
the end walls are arranged along the extending direction of the existing subway, are oppositely arranged on two sides of the existing subway lining, and have a first preset safety distance with the existing subway lining;
each layer of steel pipe row comprises a plurality of steel pipes arranged along the transverse direction of the existing subway, the steel pipe row is arranged between the existing subway lining and the tunnel foundation pit, a second preset safety distance exists between the uppermost layer of steel pipe row and the bottom of the foundation pit, a third preset safety distance exists between the lowest layer of steel pipe row and the existing subway lining, and the steel pipe row is fixedly connected between the two end walls;
the working well is arranged on the outer side of the end wall, and the bottom of the working well is lower than the bottom of the tunnel foundation pit, so that the steel pipe row is constructed conveniently.
Preferably, the number of the end wall is two, the two end walls are symmetrically arranged on the left side and the right side of the existing subway lining, the top of the end wall is flush with the road surface, and the bottom of the end wall is flush with the bottom of the existing subway.
Preferably, the number of the steel tube rows is one layer, and the diameter of the steel tube rows is
The distance between two adjacent steel pipes is 0.6 m.
Preferably, both ends of the steel tube bank are welded with connecting steel plates, and the connecting steel plates connect the steel tube bank into a whole.
Preferably, the connecting steel plate is a double-spliced 45C I-shaped steel.
Preferably, the first preset safety distance is greater than 2m, the second preset safety distance is greater than 0.3m, and the third preset safety distance is greater than 2 m.
Preferably, the first preset safety distance is 2.5m, the second preset safety distance is 0.5m, and the third preset safety distance is 2.5 m.
Preferably, the bottom of the working well is 1-1.5 m lower than the bottom of the tunnel foundation pit.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a tunnel foundation pit safety reinforcing structure for crossing an existing subway lining, which comprises at least two end walls, at least one layer of steel pipe row and a working well, wherein the end walls are arranged along the extension direction of the existing subway, the end walls are oppositely arranged on two sides of the existing subway lining, the steel pipe row is fixedly connected between the two end walls, the working well is arranged on the outer side of the end walls, and the bottom of the working well is lower than the bottom of the tunnel foundation pit, so that the construction of the steel pipe row is facilitated. The steel pipe row can effectively resist the uplift of the existing subway lining, is simple in structure, can effectively reduce cost while guaranteeing the supporting effect, and ensures the safety and normal operation of the existing subway lining in the construction process of the tunnel foundation pit.
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 schematic illustration of a reinforced vertical surface in one embodiment of the present invention;
FIG. 2 is a schematic plan view of reinforcement in one embodiment of the present invention.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
The reference numbers illustrate:
a tunnel foundation pit 100; an end wall 110; a steel tube row 120; a steel pipe 121; a connecting steel plate 122; a working well 130;
existing subway linings 200.
Filling soil 300; silty clay 310; middle stroke slate 320.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection 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, 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.
Referring to fig. 1-2, in an embodiment of the present invention, a tunnel foundation pit safety reinforcement structure for spanning an existing subway lining is provided, where the tunnel foundation pit 100 is disposed above the existing subway lining 200, and includes: at least two end walls 110, at least one layer of steel tube row 120 and a working well 130; the headwall 110 is disposed along an extending direction of the existing subway lining 200, and the headwall 110 is disposed at two sides of the existing subway lining 200 in an opposite manner and has a first preset safety distance from the existing subway lining 200. Specifically, the end walls 110 are arranged on two sides of the extension direction of the existing subway lining 200, the number of the end walls 110 can be set according to actual needs, the end walls 110 adopt reinforced concrete bored piles to connect and bear the steel pipe rows 120, and a first preset safety distance is reserved between the end walls 110 and the existing subway so as to ensure that the structure of the existing subway lining 200 is not affected in the construction process of the tunnel foundation pit 100.
Every layer steel pipe row 120 includes many edges the steel pipe 121 that the transverse direction of existing subway set up, steel pipe row 120 sets up existing subway lining 200 with between the tunnel foundation ditch 100, the superiors steel pipe row 120 with there is the second between the foundation ditch bottom and predetermines safe distance, the lower floor steel pipe row 120 with there is the third between the existing subway lining 200 and predetermines safe distance, steel pipe row 120 fixed connection be in between both sides headwall 110.
It should be understood by those skilled in the art that, in order to reinforce the existing subway lining 200 located at the bottom of the tunnel foundation pit 100 and prevent the existing subway lining 200 from raising due to unloading in excavation of the tunnel foundation pit 100, the steel tube rows 120 are disposed at the bottom of the foundation pit and at the upper portion of the existing subway lining 200, it is understood that the number of layers of the steel tube rows 120 may be set according to actual needs, and may be one layer or multiple layers, and the plurality of steel tubes 121 included in each layer of the steel tube row 120 are transversely disposed in the transverse direction of the existing subway so as to form a steel tube shed in space for protecting the existing subway lining 200. It can be understood that, in order to avoid the influence of the steel pipe row 120 on the tunnel foundation pit 100 and the existing subway lining 200, the steel pipe row 120 located at the uppermost layer needs to have a second preset safety distance from the tunnel foundation pit 100, and the steel pipe row 120 located at the lowermost layer needs to have a third preset safety distance from the existing subway lining 200.
Through setting up in the bottom of tunnel foundation ditch 100 steel tube bank 120 can resist the uplift of existing subway lining 200 effectively, and simple structure can also reduce cost effectively when guaranteeing to strut the effect simultaneously to ensure tunnel foundation ditch 100 in the work progress existing subway lining 200's safety and normal operation.
The working well 130 is disposed outside the end wall 110, and the bottom of the working well 130 is lower than the bottom of the tunnel foundation 100, so that the steel pipe row 120 can be constructed.
As a preferred embodiment of the present invention, the number of the headwall 110 is two, two headwalls 110 are symmetrically disposed on the left and right sides of the existing subway lining 200, the top of the headwall 110 is flush with the road surface, and the bottom of the headwall 110 is flush with the bottom of the existing subway. Referring again to fig. 1, the depth of the headwall 110 can be referred to the depth of the miscellaneous fill 300, the silty clay 310, and the stroke slate 320, while the top of the headwall 110 in this embodiment is flush with the road surface and the bottom of the headwall 110 is flush with the bottom of the existing subway.
In a preferred embodiment of the present invention, the number of the steel tube rows 120 is one layer, and the diameter of the steel tube 121 is equal to
The distance between two adjacent steel pipes 121 is 0.6 m. In order to make the overall structure more reasonable, the two end walls 110 are symmetrically distributed on both sides of the extension direction of the existing subway lining 200.
Furthermore, two ends of the steel tube bank 120 are welded with connecting steel plates 122, and the connecting steel plates 122 connect the steel tube bank 120 into a whole. Preferably, the connecting steel plate 122 in this embodiment is a double-split 45C i-steel. It should be noted that the connection between the two ends of the steel tube row 120 and the end wall 110 includes, but is not limited to, one or more of the connection steel plates 122 directly fixed in the end wall 110. Preferably, the two ends of the steel tube 121 in this embodiment are welded into a whole by using double-spliced 45C i-shaped steel to weld the steel tube rows 120 of each layer, so that the structural strength is greatly enhanced.
As a preferred embodiment of the present invention, the first preset safety distance is greater than 2m, the second preset safety distance is greater than 0.3m, and the third preset safety distance is greater than 2 m. It is worth noting that the first preset safety distance, the second preset safety distance, and the third preset safety distance may be set according to design requirements, preferably, in this embodiment, the first preset safety distance is 2.5m, the second preset safety distance is 0.5m, and the third preset safety distance is 2.5 m.
Further, the bottom of the working well 130 is lower than the bottom of the tunnel foundation pit 100 by 1-1.5 m, and the bottom of the working well 130 is set to be lower than the bottom of the tunnel foundation pit 100, so that the steel pipe row 120 can be constructed conveniently.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The utility model provides a tunnel foundation ditch safety strengthening structure for striding existing subway lining, the tunnel foundation ditch sets up the top of existing subway lining, its characterized in that includes: at least two end walls, at least one layer of steel pipe row and a working well; wherein,
the end walls are arranged along the extending direction of the existing subway, are oppositely arranged on two sides of the existing subway lining, and have a first preset safety distance with the existing subway lining;
each layer of steel pipe row comprises a plurality of steel pipes arranged along the transverse direction of the existing subway, the steel pipe row is arranged between the existing subway lining and the tunnel foundation pit, a second preset safety distance exists between the uppermost layer of steel pipe row and the bottom of the foundation pit, a third preset safety distance exists between the lowest layer of steel pipe row and the existing subway lining, and the steel pipe row is fixedly connected between the two end walls;
the working well is arranged on the outer side of the end wall, and the bottom of the working well is lower than the bottom of the tunnel foundation pit, so that the steel pipe row is constructed conveniently.
2. The safety reinforcement structure for the tunnel foundation pit spanning the existing subway lining as claimed in claim 1, wherein the number of said end walls is two, said two end walls are symmetrically disposed at left and right sides of said existing subway lining, top of said end walls is flush with the road surface, bottom of said end walls is flush with the bottom of said existing subway.
3. The safety reinforcement structure for tunnel foundation pit spanning existing subway lining as claimed in claim 1, wherein said steel tube row number is one layer, and said steel tube diameter is
The distance between two adjacent steel pipes is 0.6 m.
4. The safety reinforcement structure for the tunnel foundation pit spanning the existing subway lining as claimed in claim 3, wherein connecting steel plates are further welded to both ends of said steel tube row, and said connecting steel plates connect said steel tube row into one body.
5. The tunnel foundation pit safety reinforcement structure for crossing existing subway lining as claimed in claim 4, wherein said connecting steel plate is a double-spliced 45C I-steel.
6. The tunnel foundation pit safety reinforcement structure for crossing an existing subway lining as claimed in claim 3, wherein said first preset safety distance is greater than 2m, said second preset safety distance is greater than 0.3m, and said third preset safety distance is greater than 2 m.
7. The safety reinforcement structure for tunnel foundation pits spanning existing subway linings according to claim 6, wherein the first preset safety distance is 2.5m, the second preset safety distance is 0.5m, and the third preset safety distance is 2.5 m.
8. The safety reinforcement structure for the tunnel foundation pit spanning the existing subway lining as claimed in claim 6, wherein the bottom of said working well is 1-1.5 m lower than the bottom of said tunnel foundation pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120978424.0U CN215669536U (en) | 2021-05-10 | 2021-05-10 | Tunnel foundation pit safety reinforcing structure for crossing existing subway lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120978424.0U CN215669536U (en) | 2021-05-10 | 2021-05-10 | Tunnel foundation pit safety reinforcing structure for crossing existing subway lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215669536U true CN215669536U (en) | 2022-01-28 |
Family
ID=79971743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120978424.0U Active CN215669536U (en) | 2021-05-10 | 2021-05-10 | Tunnel foundation pit safety reinforcing structure for crossing existing subway lining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215669536U (en) |
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2021
- 2021-05-10 CN CN202120978424.0U patent/CN215669536U/en active Active
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