Steel-concrete combined supporting structure

Abstract

The utility model relates to a steel-concrete combined supporting structure which comprises at least one group of steel-concrete combined supporting units, at least one set of steel-concrete combined supporting unit comprises a steel formwork frame provided with a concrete pouring area. The transverse rib plate set comprises at least two transverse rib plates, and the at least two transverse rib plates are arranged on the two sides of the steel formwork frame correspondingly; the longitudinal rib plate group comprises at least two longitudinal rib plates, and the at least two longitudinal rib plates are arranged on the two sides of the steel formwork frame respectively; the bottom partition plate group is arranged at the bottom of the steel formwork frame; wherein the longitudinal rib plate group is provided with a connecting part, and the connecting part is used for being connected with other steel-concrete combined supporting units. The reinforced concrete combined supporting structure can play a temporary supporting role when the strength of the reinforced concrete cross brace does not reach the standard, foundation pit excavation can be carried out after the reinforced concrete cross brace is poured, and therefore the construction period is shortened, and the reinforced concrete combined supporting structure belongs to the technical field of constructional engineering.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a steel-concrete combined supporting structure. Background Art

[0002] When upgrading and renovating roads, old roads need to be closed for construction. During the road closure period, during the construction of urban tunnel projects, reinforced concrete support structures are widely used due to their high rigidity and low impact on the surrounding environment. Reinforced concrete support structures include support piles, crown beams, and reinforced concrete cross braces. However, the reinforced concrete support structure requires the concrete to be cured to the designed strength before the foundation pit can be excavated, which greatly increases the construction period of the tunnel project and affects urban road traffic for a long time. Utility Model Content

[0003] In view of the technical problems existing in the prior art, the purpose of the utility model is to provide a steel-concrete composite support structure to solve the problem that the existing reinforced concrete support structure needs to wait until the concrete is cured to the designed strength before the foundation pit can be excavated, which increases the construction period of the tunnel project and affects the urban road traffic for a long time.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A steel-concrete composite support structure comprises at least one group of steel-concrete composite support units; at least one group of steel-concrete composite support units comprises: a steel formwork frame, the steel formwork frame is provided with a concrete pouring area; a transverse rib plate group, the transverse rib plate group comprises at least two transverse rib plates, and the at least two transverse rib plates are respectively arranged on both sides of the steel formwork frame; a longitudinal rib plate group, the longitudinal rib plate group comprises at least two longitudinal rib plates, and the at least two longitudinal rib plates are respectively arranged on both sides of the steel formwork frame; a bottom partition plate group, the bottom partition plate group is arranged at the bottom of the steel formwork frame; wherein, a connecting portion is provided on the longitudinal rib plate group, and the connecting portion is used to connect with other steel-concrete composite support units.

[0006] As a preferred embodiment, the steel formwork frame includes a first side plate, a second side plate and a bottom plate, and the first side plate and the second side plate are respectively fixedly connected to the two sides of the bottom plate to form a concrete pouring area; at least two transverse ribs are respectively arranged on the first side plate and the second side plate, at least two longitudinal ribs are respectively arranged on the first side plate and the second side plate, and a bottom partition plate group is arranged at the bottom of the bottom plate.

[0007] As a preference, the first side plate and the second side plate are parallel to each other, and the first side plate and the second side plate are both vertically arranged relative to the bottom plate.

[0008] As a preference, the bottom ends of the first side plate, the second side plate and the bottom partition plate are arranged flush.

[0009] As a preference, the bottom partition plate group includes at least two bottom partition plates, and the two bottom partition plates are spaced apart and arranged at the bottom of the steel formwork frame.

[0010] As a preferred embodiment, the connecting portion is a bolt hole.

[0011] As a preferred embodiment, there are multiple groups of transverse rib plates, and the multiple groups of transverse rib plates are arranged at intervals on the steel formwork frame.

[0012] As a preferred embodiment, there are multiple groups of longitudinal rib plates, and the multiple groups of longitudinal rib plates are arranged at intervals on the steel formwork frame.

[0013] In general, the utility model has the following advantages:

[0014] The steel-concrete composite support structure of the utility model is applied in the construction of urban tunnel projects, achieving the characteristics of high rigidity of tunnel project support and small impact on surrounding strata, while taking into account the goals of rapid construction and shortening the construction period. The steel-concrete composite support structure can be combined in different quantities according to the support length to improve applicability and flexibility. In the construction of strip foundation pit support, the steel-concrete composite support structure is used as a steel formwork for reinforced concrete cross braces to improve the molding quality of the cross braces, and as a cross brace support in the early stage of the strip foundation pit, so that the foundation pit can be excavated before the reinforced concrete cross braces reach the design strength. As the excavation depth increases, the force on the steel-concrete composite support structure increases, and the strength of the reinforced concrete cross braces also increases, and the two can be stressed together. The reinforced concrete is compressed to provide out-of-plane support for the steel-concrete composite support structure, and the two give full play to their own characteristics to achieve the best stress state. When the reinforced concrete cross brace reaches the design strength, the steel-concrete composite support structure can be dismantled for recycling, reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a steel-concrete composite support structure.

[0016] Figure 2 Schematic diagram of a steel-concrete composite support structure after being filled with concrete.

[0017] Among them, 1 is concrete, 2 is the longitudinal rib plate group, 3 is the connecting part, 4 is the bottom partition plate group, 5 is the transverse rib plate group, 6 is the concrete pouring area, 7 is the first side plate, 8 is the second side plate, and 9 is the bottom plate. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with specific implementation methods.

[0019] like Figure 1-2As shown, a steel-concrete composite support structure provided in this embodiment includes at least one group of steel-concrete composite support units; at least one group of steel-concrete composite support units includes: a steel formwork frame, the steel formwork frame is provided with a concrete pouring area 6; a transverse rib plate group 5, the transverse rib plate group 5 includes at least two transverse rib plates, and the at least two transverse rib plates are respectively arranged on both sides of the steel formwork frame; a longitudinal rib plate group 2, the longitudinal rib plate group 2 includes at least two longitudinal rib plates, and the at least two longitudinal rib plates are respectively arranged on both sides of the steel formwork frame; a bottom partition plate group 4, the bottom partition plate group 4 is arranged at the bottom of the steel formwork frame; wherein, a connecting portion 3 is provided on the longitudinal rib plate group 2, and the connecting portion 3 is used to connect with other steel-concrete composite support units. Exemplarily, the transverse rib group 5 includes two transverse ribs, which are respectively arranged on both sides of the steel formwork frame; the longitudinal rib group 2 includes two longitudinal ribs, which are respectively arranged on both sides of the steel formwork frame; the transverse rib group 5 can be provided with more than two transverse ribs according to the bearing capacity requirements, and the longitudinal rib group 2 can be provided with more than two longitudinal ribs according to the bearing capacity requirements; the steel formwork frame is formed by welding steel plates, and the shape of the steel formwork frame is set according to the terrain to be supported. For example, when supporting a strip foundation pit, the steel formwork frame is a groove-shaped structure. The transverse rib group 5, the longitudinal rib group 2 and the bottom partition group 4 are all formed by cutting steel plates, and their structure can be an existing rib structure; the number of steel-concrete composite support units is set according to the terrain to be supported. For example, when supporting a strip foundation pit, the length of the strip foundation pit is measured in advance, and then the number of required steel-concrete composite support units is calculated, and then the steel-concrete composite support units are connected in sequence through the connecting part 3. The connecting part 3 can be a bolt hole. Adjacent steel-concrete composite support units can be fixed by connecting high-strength bolts to the bolt holes. The concrete pouring area 6 is used to pour concrete 1. After the concrete 1 is poured, the steel formwork frame and the concrete 1 are subjected to force together, thereby improving the overall strength of the steel-concrete composite support structure.

[0020] like Figure 1-2 As shown, in some embodiments, the steel formwork frame includes a first side plate 7, a second side plate 8 and a bottom plate 9, the first side plate 7 and the second side plate 8 are respectively fixedly connected to both sides of the bottom plate 9 to form a concrete pouring area 6; at least two transverse ribs are respectively arranged on the first side plate 7 and the second side plate 8, at least two longitudinal ribs are respectively arranged on the first side plate 7 and the second side plate 8, and the bottom partition plate group 4 is arranged at the bottom of the bottom plate 9. By setting the steel formwork frame into the above structure, when supporting the strip foundation pit, the left and right sides and the bottom of the steel formwork frame are closed, and the top is open, so that the pressure on both sides of the strip foundation pit can be supported in cooperation with the concrete pouring area 6, and it can play a role of temporary support when the strength of the reinforced concrete cross brace has not yet been reached.

[0021] like Figure 1-2As shown, in some embodiments, the first side plate 7 and the second side plate 8 are parallel to each other, and the first side plate 7 and the second side plate 8 are both arranged vertically relative to the bottom plate 9. By arranging the first side plate 7 and the second side plate 8 in this way, it is convenient to weld the first side plate 7 and the second side plate 8 to the bottom plate 9.

[0022] like Figure 1-2 As shown, in some embodiments, the bottom ends of the first side plate 7, the second side plate 8 and the bottom partition are arranged flush. By arranging the first side plate 7, the second side plate 8 and the bottom partition in this way, the three can bear force together, thereby improving the overall strength.

[0023] like Figure 1-2 As shown, in some embodiments, the bottom partition group 4 includes at least two bottom partitions, and the two bottom partitions are spaced apart and arranged at the bottom of the steel formwork frame. By setting the bottom partition, it plays a role of temporary support when the reinforced concrete cross brace is poured but does not reach the design strength in the early stage of strip foundation pit excavation. In addition, a connecting part (bolt hole) is also provided on the bottom partition group, which is used for the common force of the bottom partition and the transverse rib when one side of the end steel-concrete composite support unit is connected to the waist beam or the crown beam, and is connected to the bolt holes pre-buried in the waist beam or the crown beam through the connecting part.

[0024] like Figure 1-2 As shown, in some embodiments, the connection portion 3 is a bolt hole. The connection portion 3 arranged in this way is convenient for processing and connecting adjacent steel-concrete composite support units.

[0025] like Figure 1-2 As shown, in some embodiments, the number of transverse rib plate groups 5 is multiple, and the multiple transverse rib plate groups 5 are arranged at intervals on the steel formwork frame. Exemplarily, the number of transverse rib plate groups 5 is three, and the three transverse rib plate groups 5 are arranged at intervals along the upper, middle and lower parts of the steel formwork frame to provide out-of-plane stiffness for the steel formwork frame, ensuring that the steel-concrete composite support structure has sufficient stiffness and stability to ensure the early support of foundation pit excavation.

[0026] like Figure 1-2 As shown, in some embodiments, the number of longitudinal rib plate groups 2 is multiple, and the multiple longitudinal rib plate groups 2 are arranged at intervals on the steel formwork frame. Exemplarily, the number of longitudinal rib plate groups 2 is two, and the two longitudinal rib plate groups 2 are respectively arranged at the two ends of the steel formwork frame, and the two ends of the steel formwork frame refer to the ends where the steel formwork frame is connected to the adjacent steel formwork frame. Through the longitudinal rib plate groups 2 arranged in this way, the overall strength of the steel-concrete composite support structure is strengthened, and the connection of adjacent steel-concrete composite support structures is also facilitated.

[0027] Specific application example: In the construction of urban tunnel projects, strip foundation pits are usually supported in the form of bored cast-in-place piles + waist beams or crown beams + reinforced concrete cross bracing beams. After the bored cast-in-place piles are constructed, bolt holes are pre-buried during the construction of the waist beams or crown beams. The reinforced concrete cross bracing beams are constructed using a steel-concrete composite support structure. First, the number of splicing steel-concrete composite support units is determined according to the width of the foundation pit. The steel-concrete composite support units are connected to the waist beams or crown beams by bolts. The adjacent steel-concrete composite support units are connected through the bolt holes on the longitudinal rib group 2, and finally a steel-concrete composite support structure is formed. The steel-concrete composite support structure serves as the formwork for the reinforced concrete cross bracing beams. Construction workers tie steel bars and pour concrete on the steel formwork frame. The steel-concrete composite support structure, which is used as the early support, can play a temporary support role when the strength of the reinforced concrete cross bracing has not yet been reached. The foundation pit soil can be excavated the next day after the concrete is poured, shortening the maintenance time of the reinforced concrete cross bracing beams. As the tunnel foundation pit is excavated, the steel-concrete composite support structure bears a larger load on the foundation pit. At this time, the strength of the reinforced concrete cross brace is gradually increasing, and it works together with the steel-concrete composite support as an auxiliary force. When the reinforced concrete cross brace is maintained to the design requirements, the steel-concrete composite support structure can be dismantled for turnover and recycling.

[0028] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A steel-concrete composite support structure, characterized in that: It includes at least one set of steel-concrete composite support units; At least one set of steel-concrete composite support units includes: Steel formwork frame, which is equipped with a concrete pouring area; A transverse rib plate group, the transverse rib plate group includes at least two transverse rib plates, and the at least two transverse rib plates are respectively arranged on both sides of the steel formwork frame; A longitudinal rib plate group, the longitudinal rib plate group includes at least two longitudinal rib plates, and the at least two longitudinal rib plates are respectively arranged on both sides of the steel formwork frame; A bottom diaphragm group, which is arranged at the bottom of the steel formwork frame; Among them, a connecting part is provided on the longitudinal rib plate group, and the connecting part is used to connect with other steel-concrete composite supporting units.

2. A steel-concrete composite support structure according to claim 1, characterized in that: The steel formwork frame includes a first side plate, a second side plate and a bottom plate. The first side plate and the second side plate are respectively fixedly connected to the two sides of the bottom plate to form a concrete pouring area; at least two transverse ribs are respectively arranged on the first side plate and the second side plate, at least two longitudinal ribs are respectively arranged on the first side plate and the second side plate, and a bottom partition plate group is arranged at the bottom of the bottom plate.

3. A steel-concrete composite support structure according to claim 2, characterized in that: The first side plate and the second side plate are parallel to each other, and both the first side plate and the second side plate are vertically arranged relative to the bottom plate.

4. A steel-concrete composite support structure according to claim 2, characterized in that: The bottom ends of the first side plate, the second side plate and the bottom partition plate are arranged flush with each other.

5. A steel-concrete composite support structure according to claim 1, characterized in that: The bottom partition plate group comprises at least two bottom partition plates, and the two bottom partition plates are arranged at intervals at the bottom of the steel formwork frame.

6. A steel-concrete composite support structure according to claim 1, characterized in that: The connecting portion is a bolt hole.

7. A steel-concrete composite support structure according to claim 1, characterized in that: There are multiple transverse rib plate groups, and the multiple transverse rib plate groups are arranged at intervals on the steel formwork frame.

8. A steel-concrete composite support structure according to claim 1, characterized in that: There are multiple groups of longitudinal rib plates, and the multiple groups of longitudinal rib plates are arranged at intervals on the steel formwork frame.

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