CN220908415U - Prefabricated assembled subway foundation pit supporting structure - Google Patents
Prefabricated assembled subway foundation pit supporting structure Download PDFInfo
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- CN220908415U CN220908415U CN202322405947.8U CN202322405947U CN220908415U CN 220908415 U CN220908415 U CN 220908415U CN 202322405947 U CN202322405947 U CN 202322405947U CN 220908415 U CN220908415 U CN 220908415U
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- foundation pit
- prefabricated assembled
- supporting structure
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- shaft
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- 239000004567 concrete Substances 0.000 claims abstract description 11
- 239000002689 soil Substances 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims abstract description 8
- 238000005056 compaction Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 32
- 239000010959 steel Substances 0.000 claims description 32
- 239000004568 cement Substances 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method 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
- 239000010865 sewage Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a prefabricated assembled subway foundation pit supporting structure which comprises a plurality of prefabricated assembled rectangular shafts, a capping beam, a compaction grouting body layer, a plurality of sleeve valve pipes, a plurality of anti-capsizing anchor rods and a low-grade concrete layer. The prefabricated assembled rectangular vertical shaft is arranged in the foundation pit and comprises a plurality of layers of rectangular well frames which are spliced up and down in sequence. The top beam extends out of the foundation pit to form an extension section. The compacting grouting body layer is positioned at the bottom of the foundation pit. The plurality of anti-overturning anchor rods are uniformly distributed on the outer side of the foundation pit by taking the foundation pit as the center and penetrate through the extension section of the capping beam. The sleeve valve pipes are uniformly distributed between the foundation pit and the anti-overturning anchor rod by taking the foundation pit as the center. The sleeve valve pipe can enhance the stability of the soil body of the pit wall, realize lateral water stop and fill gaps between the pit wall and the soil body of the foundation pit; the anti-overturning anchor rod can prevent the top beam from overturning. The low-grade concrete layer can avoid the floating of the subway, has short construction period and greatly reduces engineering risks.
Description
Technical Field
The utility model relates to a foundation pit supporting structure, in particular to a prefabricated assembled subway foundation pit supporting structure.
Background
Along with the rapid development of urban municipal roads and urban rail transit, the phenomenon of crossing subways on municipal pipelines is more and more, pipelines such as a rainwater pipe, a sewage pipe, a utility tunnel and the like with larger burial depth and deeper foundation ditch excavation are required to be ensured, the foundation pit supporting structure is required to ensure the safety of a foundation pit body, the safety protection of subways is also related, and particularly, the foundation pit supporting structure is required to prevent the foundation pit structure from invading the safety protection line of the subways structure and the problem of subway floating caused by foundation pit excavation.
The conventional foundation pit mainly adopts supporting means such as row piles, underground continuous walls and the like, but the supporting structures are required to be embedded into the pit bottom to a certain depth, so that the distance between the supporting structures and the top of the subway is smaller and smaller, and the potential safety risk of the subway is high; if the embedding depth is reduced, the safety of the foundation pit is difficult to meet. And the existing foundation pit supporting structure has long construction period, and can occupy urban roads for a long time, thereby influencing traffic.
Disclosure of utility model
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the prefabricated assembled subway foundation pit supporting structure, which can shorten the construction period and ensure the safety performance.
The prefabricated assembled subway foundation pit supporting structure comprises a plurality of prefabricated assembled rectangular shafts, a capping beam, a compaction grouting body layer, a plurality of sleeve valve pipes, a plurality of anti-capsizing anchor rods and a low-grade concrete layer. The prefabricated assembled rectangular vertical shaft is arranged in the foundation pit and comprises a plurality of layers of rectangular well frames which are spliced up and down in sequence. The top beam is arranged at the top of the rectangular well frame at the uppermost layer and is positioned at the well mouth of the foundation pit, and the top beam extends out of the extension section towards the outer side of the foundation pit. And the compaction grouting body layer is positioned at the bottom of the foundation pit. The anti-overturning anchor rods are uniformly distributed on the outer side of the foundation pit by taking the foundation pit as the center, and the anti-overturning anchor rods penetrate through the extending section of the capping beam. The sleeve valve pipes are uniformly distributed between the foundation pit and the anti-overturning anchor rod by taking the foundation pit as the center. The low-grade concrete layer is backfilled at the lower part of each prefabricated assembled rectangular vertical shaft.
The prefabricated assembled subway foundation pit supporting structure provided by the embodiment of the utility model has at least the following beneficial effects:
When the method is applied to the embodiment of the utility model, when the subway upper pipe line foundation pit support is carried out, a plurality of prefabricated assembly type rectangular vertical shafts are adopted for segmented construction at intervals, the prefabricated assembly can improve the field assembly efficiency, in addition, the problems of embedding length of the subway upper pipe line foundation pit support structure and subway floating are solved, sleeve valve pipes can enhance the stability of pit wall soil bodies, side water stop is realized, gaps between the pit walls and the soil bodies are filled, and the pit wall friction force is increased; the anti-overturning anchor rod can prevent the roof beam from overturning due to overlarge gravity of the vertical pit wall. The low-grade concrete layer plays a role in counter-pressure counterweight and avoids subway floating when the vertical shaft is excavated. The construction period of the utility model is short, the stability is high, and the engineering risk is greatly reduced.
According to some embodiments of the utility model, the roof rail is provided with a raised structure near the inside of the pit.
According to some embodiments of the utility model, a set cement powder slag stabilizing layer is arranged below the extension section of the top cover.
According to some embodiments of the present utility model, each prefabricated assembled rectangular shaft comprises a plurality of layers of rectangular shaft frames, each rectangular shaft frame comprises four middle section shaft walls and four corner shaft walls, the middle section shaft walls and the corner shaft walls are spliced at intervals to form a complete rectangular shaft frame, mutually matched stepped structures are arranged at splicing positions of the adjacent middle section shaft walls and the adjacent corner shaft walls, and bolts are arranged in each rectangular shaft frame in a penetrating manner after the adjacent middle section shaft walls and the adjacent corner shaft walls are spliced through the stepped structures.
According to some embodiments of the present utility model, the thickness of the step-shaped structure is equal to half of the thickness of the middle section well wall or the corner well wall, nine bolt holes are reserved on each step-shaped structure, and nuts are embedded at ports of the bolt holes corresponding to the soil surface.
According to some embodiments of the present utility model, the two upper and lower adjacent middle section well walls and the two upper and lower adjacent corner well walls are connected through steel sheet locks.
According to some embodiments of the utility model, the steel sheet lock comprises clamping grooves and clamping heads, four clamping grooves are pre-embedded in the lower parts of each middle section well wall and each corner well wall, and the clamping grooves are fixed through two first anchor bars; four pre-buried steel plates are arranged on the upper portions of the middle section well wall and the corner well walls, the pre-buried steel plates are used for being welded and fixed on the clamping heads, and the pre-buried steel plates are fixed through two second anchor bars.
According to some embodiments of the utility model, two I-steel vertical supports and two steel pipe cross supports are installed in each prefabricated assembled rectangular vertical shaft, and the two I-steel vertical supports are fixedly connected to two ends of the steel pipe cross supports.
According to some embodiments of the utility model, the thickness of the cement powder slag stabilizing layer is 0.5 m-1.0 m.
According to some embodiments of the utility model, the thickness of the compacted slurry layer is greater than 2m.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The utility model is further described with reference to the accompanying drawings and examples, in which:
Fig. 1 is a first view of a prefabricated assembled subway foundation pit supporting structure according to an embodiment of the present utility model;
Fig. 2 is a second view of a prefabricated assembled subway foundation pit supporting structure according to an embodiment of the present utility model;
FIG. 3 is a third view of a prefabricated assembled subway foundation pit supporting structure according to an embodiment of the present utility model;
Fig. 4 is a schematic structural view of a steel sheet lock of a prefabricated assembled subway foundation pit supporting structure according to an embodiment of the utility model;
fig. 5 is a schematic structural diagram of a middle section well wall of a prefabricated assembled subway foundation pit supporting structure according to an embodiment of the present utility model;
FIG. 6 is a schematic structural view of a corner well wall of a prefabricated assembled subway foundation pit supporting structure according to an embodiment of the utility model;
Reference numerals:
101. Compacting the grouting body layer; 102. a cement powder slag stabilizing layer; 103. a capping beam; 104. anti-overturning anchor rod; 105. a sleeve valve tube; 106. a stepped structure; 107. a middle section well wall; 108. turning the well wall; 109. a bolt; 110. prefabricating an assembled rectangular vertical shaft; 111. a clamping groove; 112. a first anchor bar; 113. embedding a steel plate; 114. a steel sheet lock; 115. a chuck; 116. a second anchor bar; 117. i-steel vertical support; 118. a steel pipe cross brace; 119. a bump structure; 120. a subway; 121. a low grade concrete layer; 122. bolt holes.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.
Referring to fig. 1 to 6, the prefabricated assembled subway foundation pit supporting structure according to an embodiment of the present utility model includes a plurality of prefabricated assembled rectangular shafts 110, a capping beam 103, a compacting grouting layer 101, a plurality of sleeve valve pipes 105, a plurality of anti-capsizing anchor rods 104 and a low-grade concrete layer 121. The prefabricated assembled rectangular vertical shaft 110 is arranged in the foundation pit, and the prefabricated assembled rectangular vertical shaft 110 comprises a plurality of layers of rectangular well frames which are spliced up and down in sequence. The top-pressure beam 103 is arranged at the top of the rectangular well frame at the uppermost layer and is positioned at the well mouth of the foundation pit, and the top-pressure beam 103 extends out of the foundation pit to form an extension section. The compaction grouting material layer 101 is positioned at the bottom of the foundation pit. The plurality of anti-capsizing anchor rods 104 are uniformly distributed on the outer side of the foundation pit by taking the foundation pit as the center, and the anti-capsizing anchor rods 104 are arranged on the extending section of the top beam 103 in a penetrating manner. A plurality of sleeve valve pipes 105 are uniformly distributed between the foundation pit and the anti-overturning anchor 104 by centering the foundation pit. A low-grade concrete layer 121 is backfilled in the lower portion of each prefabricated modular rectangular shaft 110.
When the utility model of the embodiment is applied, when the line foundation pit support is carried out on the upper side of the subway 120, a plurality of prefabricated assembled rectangular vertical shafts 110 are adopted for segmented construction at intervals, the prefabricated assembly can improve the field assembly efficiency, in addition, the problems of embedding length of the line foundation pit support structure on the upper side of the subway 120 and floating of the subway 120 are solved, the sleeve valve pipe 105 can enhance the stability of the soil body of the pit wall, side water stop is realized, gaps between the pit wall and the soil body of the pit are filled, and the friction force of the pit wall is increased. The anti-toppling anchor 104 can prevent the roof rail 103 from toppling due to excessive vertical pit wall gravity. The low-grade concrete layer 121 serves as a counter-pressure counterweight, avoiding the floating up of the subway 120 when the shaft is excavated. The construction period of the utility model is short, the stability is high, and the engineering risk is greatly reduced.
Referring to fig. 1, in some embodiments of the present utility model, the inside of the roof rail 103 near the foundation pit is provided with a protrusion 119 for water blocking. Specifically, the cross-sectional dimension of the capping beam 103 is 1.2m to 1.5m wide and 0.4m to 0.6m high, and the protruding portion of the protruding structure 119 of the capping beam 103 is 0.3m to 0.4m wide and 0.3m to 0.4m high. The capping beam 103 is a prefabricated reinforced concrete structure, and the concrete grade adopts C30.
Referring to fig. 1, in some embodiments of the present utility model, a set cement slag stabilizing layer 102 is provided below the extension of the roof rail 103. The cement powder slag stabilizing layer 102 mainly plays roles of increasing the strength of the soil body at the pit top and avoiding excessive settlement of the top beam 103, and the thickness of the cement powder slag stabilizing layer 102 is 0.5 m-1.0 m, and is specifically determined according to the condition of the soil body at the pit top.
Referring to fig. 1 to 3, in some embodiments of the present utility model, each prefabricated assembled rectangular shaft 110 includes a plurality of layers of rectangular frames, each rectangular frame includes four middle section shaft walls 107 and four corner shaft walls 108, the middle section shaft walls 107 and the corner shaft walls 108 are spliced at intervals to form a complete rectangular frame, the splicing positions of the adjacent middle section shaft walls 107 and corner shaft walls 108 are provided with mutually matched stepped structures 106, and the adjacent middle section shaft walls 107 and corner shaft walls 108 in each rectangular frame are fixedly spliced through bolts 109 penetrating through the stepped structures 106.
Referring to fig. 3, 5 and 6, in some embodiments of the present utility model, the thickness of the stepped structure 106 is equal to half the thickness of the middle well wall 107 or the corner well wall 108, and nine bolt holes 122 are reserved on each stepped structure 106, and nuts are embedded at the ports of the bolt holes 122 on the soil surface.
In some embodiments of the present utility model, two middle section well walls 107 adjacent to each other up and down, and two corner well walls 108 adjacent to each other up and down are connected by a steel lock 114.
Referring to fig. 3, 5 and 6, in some embodiments of the present utility model, the steel lock 114 includes a clamping groove 111 and a clamping head 115, four clamping grooves 111 are pre-embedded in the lower portion of each middle section well wall 107 and each corner well wall 108, and the clamping grooves 111 are fixed by two first anchor bars 112; four pre-buried steel plates 113 are arranged on the upper portions of each middle-section well wall 107 and each corner well wall 108, the pre-buried steel plates 113 are used for welding and fixing clamp heads 115, and the pre-buried steel plates 113 are fixed through two second anchor bars 116. The clamping groove 111 is made of spring steel sheets. It will be appreciated that the clip groove 111 in this embodiment is also provided in the bottom of the capping beam 103.
Referring to fig. 2, in some embodiments of the present utility model, two i-steel vertical braces 117 and a steel pipe wale 118 are installed in each prefabricated assembled rectangular shaft 110, and the two i-steel vertical braces 117 are fixedly connected to both ends of the steel pipe wale 118.
In some embodiments of the utility model, the set cement powder slag stabilization layer 102 has a thickness of 0.5m to 1.0m.
In some embodiments of the utility model, the thickness of the compacted slurry layer 101 is greater than 2m.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The utility model provides a prefabricated pin-connected panel subway foundation ditch supporting construction which characterized in that includes:
The prefabricated assembled rectangular vertical shafts are arranged in the foundation pit and comprise a plurality of layers of rectangular well frames which are spliced up and down in sequence;
The top beam is arranged at the top of the rectangular well frame at the uppermost layer and is positioned at the well mouth of the foundation pit, and an extension section extends out of the top beam towards the outer side of the foundation pit;
The compaction grouting body layer is positioned at the bottom of the foundation pit;
the anti-overturning anchor rods are uniformly distributed on the outer side of the foundation pit by taking the foundation pit as the center, and are arranged on the extending section of the capping beam in a penetrating manner;
The sleeve valve pipes are uniformly distributed between the foundation pit and the anti-overturning anchor rod by taking the foundation pit as a center; and
And the low-grade concrete layers are backfilled at the lower part of each prefabricated assembled rectangular vertical shaft.
2. The prefabricated assembled subway foundation pit supporting structure according to claim 1, wherein: and the inner side of the capping beam, which is close to the foundation pit, is provided with a protruding structure.
3. The prefabricated assembled subway foundation pit supporting structure according to claim 1, wherein: and a cement powder slag stabilizing layer is arranged below the extension section of the top beam.
4. The prefabricated assembled subway foundation pit supporting structure according to claim 1, wherein: each prefabricated assembled rectangular vertical shaft comprises a plurality of layers of rectangular shaft frames, each rectangular shaft frame comprises four middle section shaft walls and four corner shaft walls, the middle section shaft walls and the corner shaft walls are spliced into a complete rectangular shaft frame at intervals, mutually matched stepped structures are arranged at splicing positions of the adjacent middle section shaft walls and the corner shaft walls, and bolts are arranged in the adjacent middle section shaft walls and the corner shaft walls in a penetrating mode after the stepped structures are spliced.
5. The prefabricated assembled subway foundation pit supporting structure according to claim 4, wherein: the thickness of the step-shaped structure is equal to half of the thickness of the middle-section well wall or the corner well wall, nine bolt holes are reserved in each step-shaped structure, and nuts are embedded at ports of the bolt holes on the soil surface.
6. The prefabricated assembled subway foundation pit supporting structure according to claim 4, wherein: the two upper and lower adjacent middle section well walls and the two upper and lower adjacent corner well walls are connected through steel sheet locks.
7. The prefabricated assembled subway foundation pit supporting structure according to claim 6, wherein: the steel sheet lock comprises clamping grooves and clamping heads, four clamping grooves are pre-buried in the lower parts of each middle section well wall and each corner well wall, and the clamping grooves are fixed through two first anchor bars; four pre-buried steel plates are arranged on the upper portions of the middle section well wall and the corner well walls, the pre-buried steel plates are used for being welded and fixed on the clamping heads, and the pre-buried steel plates are fixed through two second anchor bars.
8. The prefabricated assembled subway foundation pit supporting structure according to claim 1, wherein: two I-steel vertical supports and steel pipe cross supports are arranged in each prefabricated assembled rectangular vertical shaft, and the two I-steel vertical supports are fixedly connected to two ends of the steel pipe cross supports.
9. The prefabricated assembled subway foundation pit supporting structure according to claim 3, wherein: the thickness of the cement powder slag stabilizing layer is 0.5 m-1.0 m.
10. The prefabricated assembled subway foundation pit supporting structure according to claim 1, wherein: the thickness of the compaction grouting body layer is more than 2m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322405947.8U CN220908415U (en) | 2023-09-05 | 2023-09-05 | Prefabricated assembled subway foundation pit supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322405947.8U CN220908415U (en) | 2023-09-05 | 2023-09-05 | Prefabricated assembled subway foundation pit supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220908415U true CN220908415U (en) | 2024-05-07 |
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ID=90918507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322405947.8U Active CN220908415U (en) | 2023-09-05 | 2023-09-05 | Prefabricated assembled subway foundation pit supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220908415U (en) |
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2023
- 2023-09-05 CN CN202322405947.8U patent/CN220908415U/en active Active
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