CN217174813U - Foundation pit supporting structure combining floor slab and steel pipe support above operation subway tunnel - Google Patents
Foundation pit supporting structure combining floor slab and steel pipe support above operation subway tunnel Download PDFInfo
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- CN217174813U CN217174813U CN202220109327.2U CN202220109327U CN217174813U CN 217174813 U CN217174813 U CN 217174813U CN 202220109327 U CN202220109327 U CN 202220109327U CN 217174813 U CN217174813 U CN 217174813U
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Abstract
A foundation pit supporting structure combining a floor slab and a steel pipe support above an operation subway tunnel comprises a permanent structure positioned in a first-stage foundation pit and a steel pipe support positioned above a second-stage foundation pit, wherein the permanent structure is a single-layer or multi-layer structure, a one-layer or stacked multi-layer integral structure is formed by a permanent structure floor slab beam, a permanent structure floor slab and a permanent structure column, one end of the steel pipe support is supported and fixed on a support structure on one side, and the other end of the steel pipe support is connected with the permanent structure floor slab beam with the corresponding elevation of the permanent structure, so that a horizontal supporting system of the foundation pit is formed together; therefore, the utility model discloses the come-up influence that causes subway operation circuit is less, can satisfy the requirement of the normal operation of subway, and has cancelled the setting of long support and interim stand, has avoided the influence of stand pile to the subway, and the job site need not to lift by crane large-scale support, has reduced the influence of work progress to the subway.
Description
Technical Field
The utility model relates to a technical field that underground space strutted especially relates to a bracing structure of foundation ditch of combination is propped with the steel pipe at operation subway tunnel top floor.
Background
Along with the development of the society, urban underground engineering construction is more and more intensive, the problem of safety influence of underground engineering construction on built structures which are put into use is more and more prominent, the influence limitation requirement of an operation subway line on a new construction is more strict, when an urban rail transit network is encrypted, the situation that a plurality of subway sections enter a land block occurs, the land block construction and the subway construction cannot be synchronously constructed due to the influence of various factors, the condition that a subway foundation pit needs to be over-operated on a subway line in the later period is caused, and the deformation control requirement in the subway operation process cannot be met by the conventional common foundation pit excavation method.
Therefore, the utility model discloses a designer has in view of above-mentioned defect, through careful research and design, synthesizes the experience and the achievement of engaging in relevant industry for a long time, and the study designs a bracing structure of foundation ditch of propping the combination at operation subway tunnel top floor and steel pipe to overcome above-mentioned defect.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a bracing structure of foundation ditch of combination is propped with the steel pipe at operation subway tunnel top floor, its simple structure, operation loading and unloading are convenient, can provide better excavation supporting.
In order to realize the above-mentioned purpose, the utility model discloses a prop supporting construction of combination at operation subway tunnel top floor and steel pipe contains the permanent structure that is located the first stage foundation ditch and is located the steel pipe support of second stage foundation ditch top, its characterized in that:
permanent structure is multilayer or individual layer structure, and its bottom is equipped with permanent structure bottom plate, and every layer structure contains the permanent structure post of many vertical supports, the top of permanent structure post is connected fixedly through many permanent structure floor beams of horizontal setting, be equipped with permanent structure floor between the permanent structure floor beam to form one deck or the multilayer integral structure of superpose through permanent structure floor beam, permanent structure floor and permanent structure post, the one end support of steel pipe brace is fixed in on the envelope of one side, thereby the other end links to each other with the permanent structure floor beam of the corresponding elevation of permanent structure and forms foundation ditch horizontal support system jointly.
Wherein: the steel pipe props and is fixed to permanent structure floor beam through embedded anchor and steel connecting plate, embedded anchor is many and one end and buries underground in permanent structure floor beam, and the other end is connected in steel connecting plate, the steel shotcrete is fixed in steel connecting plate.
Wherein: and the other end of the embedded anchor bolt is welded and fixed on the connecting steel plate.
Wherein: the steel support is welded and fixed on the connecting steel plate.
Wherein: the connecting steel plate is square, the embedded anchor bolt is arranged in an array shape, and the steel pipe support is circular with the diameter smaller than the connecting steel plate.
Wherein: the lower part of the connecting steel plate is provided with a support steel pipe support bracket, and the bracket is welded and fixed on the connecting steel plate so as to be convenient for the steel pipe support to be fixed.
Wherein: an i-steel gusset is provided between the permanent structural floor beam and the permanent structural floor to provide better support strength.
According to the above, the utility model discloses an at the excavation supporting construction that operation subway tunnel top floor propped the combination with the steel pipe has following effect:
1. the floating influence on the subway operation line is small, and the requirement of normal operation of the subway can be met.
2. The arrangement of long supports and temporary columns is cancelled, the influence of the column piles on the subway is avoided, large supports do not need to be lifted on a construction site, and the influence of the construction process on the subway is reduced.
The details of the present invention can be obtained from the following description and the attached drawings.
Drawings
Fig. 1 shows the utility model discloses a bracing and supporting structure's of foundation ditch that combination was propped at operation subway tunnel top floor and steel pipe schematic structure.
Fig. 2 shows an enlarged schematic view of a part of the structure of the present invention.
Fig. 3 shows a side view of a part of the structure of the present invention.
Fig. 4 shows a schematic view of a part of the structure of the present invention.
Fig. 5 to 10 show schematic diagrams of a construction method to which the present invention is applied.
Reference numerals:
1, foundation pit in first stage; 2-second stage foundation pit; 3, dividing lines of the foundation pit; 4, enclosing a structure; 5, supporting the steel pipe; 6-permanent structural floor beam; 7-permanent structural floor slab; 8-permanent structural columns; 9-left subway line; 10-right subway line; 13-connecting the steel plates; 14-embedded anchor bolts; 16-a support; and 17, an I-shaped steel angle support.
Detailed Description
Referring to fig. 1 to 4, the utility model discloses a bracing structure of foundation ditch of combination is propped with the steel pipe to floor above operation subway tunnel is shown.
The foundation pit of the foundation pit supporting structure formed by combining the floor slab and the steel pipe support above the operation subway tunnel is located right above the subway, the subway comprises a left subway 9 and a right subway 10, and the enclosing structures 4 are arranged on two sides of the foundation pit, as shown in figure 1, the excavation process is divided into two stages, the first stage foundation pit 1 comprises a space on one side of the foundation pit and a space on the upper part of the other side of the foundation pit, the second stage foundation pit 2 is located on the lower trapezoid on the other side of the foundation pit, a foundation pit boundary 3 is arranged between the first stage foundation pit 1 and the second stage foundation pit 2, a permanent structure in the first stage foundation pit is built in time after the first stage foundation pit 1 is excavated, one end of the steel pipe support of the second stage foundation pit 2 is abutted against the enclosing structures 4, and the other end of the steel pipe support is abutted against the permanent structure in the built first stage foundation pit 1.
As shown in fig. 1, the foundation pit supporting structure composed of the floor slab and the steel pipe brace above the operation subway tunnel comprises a permanent structure located in a first-stage foundation pit 1 and a steel pipe brace 5 located above a second-stage foundation pit 2, the permanent structure is a single-layer or multi-layer structure, a permanent structure bottom plate is arranged at the bottom of the permanent structure, each layer of structure comprises a plurality of vertically-supported permanent structure columns 8, the top ends of the permanent structure columns 8 are connected and fixed through a plurality of transversely-arranged permanent structure floor beams 6, a permanent structure floor slab 7 is arranged between the permanent structure floor beams 6, so that a one-layer or stacked multi-layer integral structure is formed through the permanent structure floor beams 6, the permanent structure floor slab 7 and the permanent structure columns 8, one end of the steel pipe brace 5 is supported and fixed on a support structure 4 on one side, and the other end is connected with the permanent structure floor slab beam 6 on the uppermost layer of the permanent structure, the steel pipe props and the permanent structure forms the horizontal supporting system of the foundation pit with very big rigidity jointly, has reduced and has produced deformation influence to the subway when second stage foundation pit excavation, has effectively overcome prior art's defect.
Referring to fig. 2, 3 and 4, the steel pipe brace 5 is fixed to the permanent structure floor beam 6 through the embedded anchor bolts 14 and the connecting steel plate 13, the embedded anchor bolts 14 are multiple, one end of each embedded anchor bolt is embedded in the permanent structure floor beam 6, the other end of each embedded anchor bolt is welded to the connecting steel plate 13, and the steel support 5 is welded and fixed to the connecting steel plate 13.
Wherein, connecting steel plate 13 is square, embedded anchor 14 is the array form setting, the steel pipe props 5 for the diameter is less than the circular of connecting steel plate 13 length, just connecting steel plate 13's lower part is equipped with the support 16 that supports steel pipe and prop 5, support 16 welded fastening is in connecting steel plate so that the steel pipe props 5 and fixes.
Wherein, can be equipped with I-steel corner brace 7 between permanent structure floor beam 6 and permanent structure floor 7 to provide better support strength when the floor is great with steel pipe brace 5 discrepancy in elevation.
Referring to fig. 5 to 10, the utility model discloses an operation subway tunnel top floor props foundation ditch construction method of excavation supporting structure of combination with steel pipe, it contains following step:
step 1: (see fig. 5) dividing the foundation pit into two stages (or more stages) of boundary positions, a permanent structure beam-column system is arranged, and the range of the first stage foundation pit comprises the beam-column system at the boundary positions;
and 2, step: constructing a building enclosure of the foundation pit, wherein the building enclosure is arranged at the periphery of the permanent structure, and the building enclosure is not required to be arranged at the staging boundary;
and step 3: constructing a first-stage foundation pit by an open cut method, and adopting slope relief treatment at a staging boundary;
and 4, step 4: (see fig. 6 and 7) pouring a permanent structure bottom plate, side walls, columns, each layer of floor slabs and beams in the primary foundation pit from bottom to top;
and 5: (see fig. 8) after the permanent structure in the first-stage foundation pit reaches the strength, beginning to excavate the second-stage foundation pit to a position below the first support, erecting a first steel pipe support, and connecting the steel pipe support with the permanent structural beam to jointly form a horizontal support system of the foundation pit;
and 6: (see fig. 9) after the supporting system is erected, excavating a second-stage foundation pit to a base;
and 7: (see fig. 10) the permanent structure in the second stage foundation pit is built back, and the construction of all underground structures is completed.
Therefore, the utility model has the advantages that:
1. the floating influence on the subway operation line is small, and the requirement of normal operation of the subway can be met.
2. The arrangement of long supports and temporary columns is cancelled, the influence of the column piles on the subway is avoided, large supports do not need to be lifted on a construction site, and the influence of the construction process on the subway is reduced.
It is to be understood that the above description and illustrations are exemplary only and are not intended to limit the present disclosure, application, or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention is intended to include any embodiments that fall within the foregoing description and the appended claims.
Claims (7)
1. The utility model provides a bracing structure of foundation ditch of combination is propped to floor and steel pipe in operation subway tunnel top contains the permanent structure that is located first phase foundation ditch and the steel pipe that is located second phase foundation ditch top and props its characterized in that:
permanent structure is multilayer or individual layer structure, and its bottom is equipped with permanent structure bottom plate, and every layer structure contains the permanent structure post of many vertical supports, the top of permanent structure post is connected fixedly through many permanent structure floor beams of horizontal setting, be equipped with permanent structure floor between the permanent structure floor beam to form one deck or the multilayer integral structure of superpose through permanent structure floor beam, permanent structure floor and permanent structure post, the one end support of steel pipe brace is fixed in on the envelope of one side, thereby the other end links to each other with the permanent structure floor beam of the corresponding elevation of permanent structure and forms foundation ditch horizontal support system jointly.
2. The foundation pit supporting structure of claim 1, which is formed by combining a floor slab and a steel pipe support above an operation subway tunnel, and is characterized in that: the steel pipe props and is fixed to permanent structure floor beam through embedded anchor and steel connecting plate, embedded anchor is many and one end and buries underground in permanent structure floor beam, and the other end is connected in steel connecting plate, the steel shotcrete is fixed in steel connecting plate.
3. The foundation pit supporting structure of claim 2, wherein the floor slab and the steel pipe support are combined above the subway operation tunnel, and the structure comprises: and the other end of the embedded anchor bolt is welded and fixed on the connecting steel plate.
4. The foundation pit supporting structure of claim 2, wherein the floor slab and the steel pipe support are combined above the subway operation tunnel, and the structure comprises: the steel support is welded and fixed on the connecting steel plate.
5. The foundation pit supporting structure of claim 2, wherein the floor slab and the steel pipe support are combined above the subway operation tunnel, and the structure comprises: the connecting steel plate is square, the embedded anchor bolt is arranged in an array shape, and the steel pipe support is circular with the diameter smaller than the connecting steel plate.
6. The foundation pit supporting structure of claim 5, wherein the floor slab and the steel pipe support are combined above the subway operation tunnel, and the structure comprises: the lower part of the connecting steel plate is provided with a support steel pipe support bracket, and the bracket is welded and fixed on the connecting steel plate so as to be convenient for the steel pipe support to be fixed.
7. The foundation pit supporting structure of combination of floor slab and steel pipe support above operation subway tunnel according to any one of claim 1-6, characterized in that: an i-steel angle brace is provided between the permanent structural floor beam and the permanent structural floor slab to provide better support strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220109327.2U CN217174813U (en) | 2022-01-17 | 2022-01-17 | Foundation pit supporting structure combining floor slab and steel pipe support above operation subway tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220109327.2U CN217174813U (en) | 2022-01-17 | 2022-01-17 | Foundation pit supporting structure combining floor slab and steel pipe support above operation subway tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN217174813U true CN217174813U (en) | 2022-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220109327.2U Active CN217174813U (en) | 2022-01-17 | 2022-01-17 | Foundation pit supporting structure combining floor slab and steel pipe support above operation subway tunnel |
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| Country | Link |
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| CN (1) | CN217174813U (en) |
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2022
- 2022-01-17 CN CN202220109327.2U patent/CN217174813U/en active Active
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