A supporting structure of foundation pit steel support system

Abstract

The present application relates to a support structure of a foundation pit steel support system, and relates to the technical field of civil construction equipment. The support structure of the foundation pit steel support system in the present application includes prestressed pipe piles and steel sealing plates fixed on the top of the prestressed pipe piles; the steel sealing plates are arranged horizontally and used to support the transverse steel pipes of the steel support system; the support structure also includes a fixed assembly formed by a plurality of strip steel parts, the fixed assembly is fixedly connected to the steel sealing plates, and the fixed assembly is sleeved on the transverse steel pipes of the steel support system and fixedly connected to the transverse steel pipes. The support structure in the present application does not need to introduce various construction equipment for bored piles, which reduces the construction period of the steel support system, improves the construction efficiency of the steel support system and reduces its construction cost.

Description

Technical Field

[0001] The present application relates to the technical field of civil construction equipment, and in particular to a support structure of a foundation pit steel support system. Background Art

[0002] Foundation pit support is a measure of support, reinforcement and protection for the side walls and surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. In foundation pit support, when the surrounding conditions are limited and the excavation depth is shallow, a steel support system can generally be used in the foundation pit. The steel support system usually uses steel pipes, H-shaped steel, angle steel, etc. to enhance the stability of the engineering structure. The most common shapes are herringbone and cross shapes. The steel support system is recyclable and has the characteristics of economy and environmental protection, so it is widely used.

[0003] For some long steel support systems, it is necessary to set up column piles in the foundation pit to vertically support the long steel support system. The most common method is to use bored cast-in-place piles as column piles.

[0004] However, in actual use, some projects use prestressed pipe piles for pile foundations and foundation pits. At this time, if bored cast-in-place piles are constructed separately as column piles, it is necessary to introduce various construction equipment for bored cast-in-place piles, and it is also necessary to build facilities such as steel bar processing plants on site, which greatly increases the construction cost from an economic perspective. Utility Model Content

[0005] In order to improve the construction efficiency of a steel support and protection system and reduce its construction cost, the present application provides a support structure for a foundation pit steel support and protection system.

[0006] The supporting structure of the foundation pit steel support system provided in this application adopts the following technical solutions:

[0007] A supporting structure for a foundation pit steel support and protection system, comprising prestressed pipe piles and steel sealing plates fixedly mounted on the tops of the prestressed pipe piles; the steel sealing plates are transversely arranged and used to support transverse steel pipes of the steel support and protection system; the supporting structure also comprises a fixing assembly formed by a plurality of strip-shaped steel parts, the fixing assembly is fixedly connected to the steel sealing plates, and the fixing assembly is sleeved on the transverse steel pipes of the steel support and protection system and fixedly connected to the transverse steel pipes.

[0008] By adopting the above technical solution, prestressed pipe piles are used as column piles to support the long foundation pit steel support system. The transverse steel pipes of the steel support system are fixedly supported on the top of the prestressed pipe piles through steel sealing plates and fixing components, so as to achieve stable and reliable fixed support. In this application, there is no need to introduce various construction equipment for bored piles, nor is there any need to build facilities such as steel bar processing plants on site. The requirements for the construction site are relatively small. After canceling the construction of bored piles, the construction period is significantly reduced, the construction efficiency of the steel support system is improved, and its construction cost is reduced.

[0009] The support structure in this application is particularly suitable for projects using prestressed pipe piles for some pile foundations and foundation pits, and can also be applied to other projects with bored cast-in-place piles, thereby simplifying the construction of column piles, meeting the requirements of on-site construction nodes, and generating huge economic benefits.

[0010] Optionally, the steel sealing plate is a rectangular plate, and the length and width of the steel sealing plate are both greater than the outer diameter of the prestressed pipe pile; the center of the steel sealing plate is located on the central axis of the prestressed pipe pile; the length direction of the steel sealing plate is consistent with the length direction of the transverse steel pipe of the steel support system.

[0011] By adopting the above technical solution, the steel sealing plate can better bear the steel support system and transfer the bearing force to the prestressed pipe piles evenly and stably, forming a stable and reliable support.

[0012] Optionally, the number of the fixing components is two groups, and the two groups of the fixing components are arranged on both sides of the prestressed pipe piles along the length direction of the transverse steel pipe of the steel support and protection system.

[0013] By adopting the above technical solution, two sets of fixing components fix the transverse steel pipes of the steel support system from both sides of the prestressed pipe piles, thereby ensuring the stability of the connection between the prestressed pipe piles and the steel support system.

[0014] Optionally, each group of the fixing components includes two vertical steel strips and two longitudinal steel strips, and the two vertical steel strips are respectively arranged on both sides of the steel sealing plate and the transverse steel pipe; one of the longitudinal steel strips is located at the bottom of the steel sealing plate, and the other longitudinal steel strip is located on the upper side of the transverse steel pipe, and the upper and lower ends of the vertical steel strips are respectively fixedly connected to the two longitudinal steel strips.

[0015] By adopting the above technical scheme, two vertical steel strips and two longitudinal steel strips are combined to form a rectangular frame, which limits the horizontal steel pipes of the steel support system on all sides. The horizontal steel pipes are not easy to detach and the force is uniform and stable, which further improves the stability of the connection between the prestressed pipe piles and the steel support system.

[0016] Optionally, the strip steel members are all channel steels; the vertical strip steel member notches in the two groups of the fixing components are arranged opposite to each other, and the longitudinal strip steel member notches in the two groups of the fixing components are arranged opposite to each other; and the vertical strip steel members in the fixing components are fixedly connected to the side of the longitudinal strip steel members facing the prestressed pipe piles.

[0017] By adopting the above technical solution, the fixing assembly composed of channel steels enables the entire supporting structure to have sufficient connection strength and support strength, and the setting of the above connection structure ensures the stability and reliability of the connection of various components.

[0018] Optionally, a welded steel plate ring is welded around the top of the prestressed pipe pile and around the circumference of the prestressed pipe pile, and the lower side of the steel sealing plate is welded to the welded steel plate ring.

[0019] By adopting the above technical solution, the fixed installation of the steel sealing plate is facilitated, and at the same time the stability and reliability of the connection between the steel sealing plate and the prestressed pipe piles are improved.

[0020] Optionally, the vertical steel strips in each group of the fixing components are connected by welding to the longitudinal steel strips, and the steel sealing plate is fixedly connected by welding to the longitudinal steel strips located at the bottom of the steel sealing plate.

[0021] By adopting the above technical solution, the welding process is simple, the cost is low and the connection is stable.

[0022] Optionally, the prestressed pipe piles are PHC type pipe piles, both ends of the steel sealing plate protrude from the outer side of the prestressed pipe pile by 150mm to 250mm, and both sides of the steel sealing plate protrude from the outer side of the prestressed pipe pile by 50mm to 150mm.

[0023] By adopting the above technical solution, the above size structure matches the corresponding prestressed pipe piles, meeting the stress characteristics and specification requirements of the prestressed pipe pile materials themselves, ensuring the strength of the connection joints, and the welding of each component meets the relevant specification requirements.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The supporting structure in this application uses prestressed pipe piles as column piles to support the long-length foundation pit steel support system. It does not require the introduction of various construction equipment for bored piles, nor does it require the construction of steel bar processing facilities on site, and the requirements for the construction site are relatively small.

[0026] 2. The support structure in this application cancels the construction of bored piles and adopts prestressed pipe piles, which significantly reduces the construction period, improves the construction efficiency of the steel support system and reduces its construction cost; it can meet the requirements of on-site construction nodes and generate huge economic benefits.

[0027] 3. In this application, a fixed assembly formed by enclosing channel steel is used to connect the prestressed pipe piles and the steel support system, effectively connecting the prestressed pipe piles, steel sealing plates and transverse steel pipes into a whole, thereby improving the stability and bearing capacity of the supporting structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a side view of the support structure in this application.

[0029] Figure 2 It is a front view of the supporting structure in this application.

[0030] Figure 3 It is a top view of the support structure in this application.

[0031] Figure 4 It is a schematic diagram of the connection structure between the prestressed pipe pile and the steel sealing plate in this application.

[0032] In the figure:

[0033] 10. Prestressed pipe piles;

[0034] 20. Steel sealing plate;

[0035] 30. Transverse steel pipe;

[0036] 40. Fixing assembly; 41. Vertical steel strip; 42. Longitudinal steel strip;

[0037] 50. Welded steel plate ring. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0039] The supporting structure of the foundation pit steel support system in this application is particularly suitable for projects using prestressed pipe piles for some pile foundations and foundation pits, and can also be applied to other projects with bored cast-in-place piles, thereby simplifying the construction of column piles, meeting the requirements of on-site construction nodes, and generating huge economic benefits.

[0040] Reference Figure 1 and Figure 2 As shown, the support structure in the present application includes a prestressed pipe pile 10 and a steel sealing plate 20 fixed on the top of the prestressed pipe pile 10; a welded steel plate ring 50 is circumferentially welded around the top of the prestressed pipe pile 10, the steel sealing plate 20 is horizontally arranged, and the lower side of the steel sealing plate 20 is welded to the welded steel plate ring 50, and the steel sealing plate 20 is used to support the horizontal steel pipe 30 of the steel support and retaining system.

[0041] Combination Figure 3 and Figure 4 As shown, the steel sealing plate 20 is a rectangular plate, and the length and width of the steel sealing plate 20 are both greater than the outer diameter of the prestressed pipe pile 10; the center of the steel sealing plate 20 is located on the central axis of the prestressed pipe pile 10; the length direction of the steel sealing plate 20 is consistent with the length direction of the transverse steel pipe 30 of the steel support system. Both ends of the steel sealing plate 20 protrude from the outer side of the prestressed pipe pile 10 by 150mm to 250mm, and both sides of the steel sealing plate 20 protrude from the outer side of the prestressed pipe pile 10 by 50mm to 150mm. For example, the size of the transverse steel pipe 30 of the steel support system can be a steel support of φ530 (10), and the prestressed pipe pile 10 can adopt a PHC (500) 125-AB type pipe pile; the long side size of the steel sealing plate 20 can be 500+200+200=900mm, and the short side size can be 500+200=700mm. The above-mentioned size structure matches the corresponding prestressed pipe pile 10, meets the stress characteristics and specification requirements of the prestressed pipe pile 10 material itself, ensures the strength of the connection joints, and the welding of each component meets the relevant specification requirements; in this way, the steel sealing plate 20 can better bear the steel support system and transfer the bearing force to the prestressed pipe pile 10 evenly and stably, forming a stable and reliable support.

[0042] Reference Figure 1 , Figure 3 and Figure 4 As shown, the support structure also includes a fixing assembly 40 formed by a plurality of strip steel members, and the number of the fixing assembly 40 is two groups. The two groups of fixing assemblies 40 are arranged on both sides of the prestressed pipe pile 10 along the length direction of the transverse steel pipe 30 of the steel support system. The two groups of fixing assemblies 40 fix the transverse steel pipe 30 of the steel support system from both sides of the prestressed pipe pile 10.

[0043] Specifically, the strip steel parts are all channel steels, and the channel steel model can be [20 type channel steel; refer to Figure 1 , Figure 3 and Figure 4As shown, each set of fixing components 40 includes two vertical steel strips 41 and two longitudinal steel strips 42. The two vertical steel strips 41 are respectively arranged on both sides of the steel sealing plate 20 and the transverse steel pipe 30; one of the longitudinal steel strips 42 is located at the bottom of the steel sealing plate 20, and the other longitudinal steel strip 42 is located on the upper side of the transverse steel pipe 30. The upper and lower ends of the vertical steel strips 41 are respectively fixedly connected to the two longitudinal steel strips 42. The notches of the vertical steel strips 41 in the two sets of fixing components 40 are arranged opposite to each other, and the notches of the longitudinal steel strips 42 in the two sets of fixing components 40 are arranged opposite to each other; and the vertical steel strips 41 in the fixing components 40 are fixedly connected to the side of the longitudinal steel strips 42 facing the prestressed pipe pile 10. Two vertical steel strips 41 and two longitudinal steel strips 42 are combined to form a rectangular frame, which is mounted on the transverse steel pipes 30 of the steel support system to limit the transverse steel pipes 30 of the steel support system. The transverse steel pipes 30 are not easy to detach and are subjected to uniform and stable force. The fixing assembly 40 composed of channel steels makes the entire supporting structure have sufficient connection strength and support strength, thereby improving the stability of the connection between the prestressed pipe piles 10 and the steel support system.

[0044] In the present application, the vertical steel strips 41 in each set of fixing components 40 are welded and connected to the longitudinal steel strips 42, and the steel sealing plate 20 is welded and fixed to the longitudinal steel strips 42 located at the bottom of the steel sealing plate 20. This has simple processing technology, low cost and stable connection.

[0045] The implementation principle is as follows: when doing foundation pit support, first select appropriate prestressed pipe piles 10 and steel support systems according to design calculations and the general situation of the project, determine the pile diameter of the prestressed pipe piles 10 and the size of the steel support system, and then determine the size and quantity of the steel sealing plate 20 and the fixing assembly 40, and then contact the manufacturer for processing and production. When assembling and connecting the prestressed pipe piles 10 and the steel support system, first weld the welded steel plate ring 50 around the top of the prestressed pipe pile 10, cover the steel sealing plate 20 on the prestressed pipe pile 10 and weld it to the welded steel plate ring 50, then place the transverse steel pipe 30 of the steel support system on the steel sealing plate 20, and then assemble and weld a plurality of strip steel parts to form a fixing assembly 40 for limiting and fixing the transverse steel pipe 30.

[0046] In this application, prestressed pipe piles 10 are used as column piles to support the long foundation pit steel support system. The transverse steel pipe 30 of the steel support system is fixedly supported on the top of the prestressed pipe pile 10 through the steel cover plate 20 and the fixing assembly 40, so as to achieve stable and reliable fixed support. In this application, there is no need to introduce various construction equipment for bored piles, nor is there any need to build facilities such as steel bar processing plants on site. The requirements for the construction site are relatively small. After canceling the construction of bored piles, the construction period is significantly reduced, the construction efficiency of the steel support system is improved, and its construction cost is reduced.

[0047] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A supporting structure of a foundation pit steel support system, characterized in that: The invention comprises a prestressed pipe pile (10) and a steel sealing plate (20) fixedly mounted on the top of the prestressed pipe pile (10); the steel sealing plate (20) is arranged transversely and is used to support a transverse steel pipe (30) of a steel support and protection system; the support structure also comprises a fixing assembly (40) formed by a plurality of strip-shaped steel parts, the fixing assembly (40) is fixedly connected to the steel sealing plate (20), and the fixing assembly (40) is sleeved on the transverse steel pipe (30) of the steel support and protection system and is fixedly connected to the transverse steel pipe (30).

2. The supporting structure of the foundation pit steel support system according to claim 1 is characterized in that: The steel sealing plate (20) is a rectangular plate, and the length and width of the steel sealing plate (20) are both greater than the outer diameter of the prestressed pipe pile (10); the center of the steel sealing plate (20) is located on the central axis of the prestressed pipe pile (10); the length direction of the steel sealing plate (20) is consistent with the length direction of the transverse steel pipe (30) of the steel support system.

3. The supporting structure of the foundation pit steel support system according to claim 1 or 2, characterized in that: The number of the fixing components (40) is two groups, and the two groups of the fixing components (40) are arranged on both sides of the prestressed pipe pile (10) along the length direction of the transverse steel pipe (30) of the steel support system.

4. The supporting structure of the foundation pit steel support system according to claim 3 is characterized in that: Each group of the fixing components (40) comprises two vertical steel strips (41) and two longitudinal steel strips (42), and the two vertical steel strips (41) are respectively arranged on both sides of the steel sealing plate (20) and the transverse steel pipe (30); one of the longitudinal steel strips (42) is located at the bottom of the steel sealing plate (20), and the other longitudinal steel strip (42) is located on the upper side of the transverse steel pipe (30), and the upper and lower ends of the vertical steel strips (41) are respectively fixedly connected to the two longitudinal steel strips (42).

5. The supporting structure of the foundation pit steel support system according to claim 4 is characterized in that: The strip steel members are all channel steels; the notches of the vertical strip steel members (41) in the two groups of the fixing assemblies (40) are arranged opposite to each other, and the notches of the longitudinal strip steel members (42) in the two groups of the fixing assemblies (40) are arranged opposite to each other; and the vertical strip steel members (41) in the fixing assemblies (40) are fixedly connected to the side of the longitudinal strip steel members (42) facing the prestressed pipe pile (10).

6. The supporting structure of the foundation pit steel support system according to claim 1 or 2, characterized in that: A welded steel plate ring (50) is welded around the top of the prestressed pipe pile (10) in the circumferential direction of the prestressed pipe pile (10), and the lower side of the steel sealing plate (20) is welded to the welded steel plate ring (50).

7. The supporting structure of the foundation pit steel support system according to claim 3 is characterized in that: The vertical steel strips (41) in each group of the fixing components (40) are connected by welding to the longitudinal steel strips (42), and the steel sealing plate (20) is fixedly connected by welding to the longitudinal steel strips (42) located at the bottom of the steel sealing plate (20).

8. The supporting structure of the foundation pit steel support system according to claim 2 is characterized in that: The prestressed pipe pile (10) is a PHC type pipe pile, and both ends of the steel sealing plate (20) protrude from the outer side surface of the prestressed pipe pile (10) by 150mm to 250mm, and both sides of the steel sealing plate (20) protrude from the outer side surface of the prestressed pipe pile (10) by 50mm to 150mm.

Images