Fabricated prestress combined horizontal steel supporting structure system for deep foundation pit

Abstract

The utility model relates to a deep foundation pit assembly type prestress combined horizontal steel supporting structure system which is characterized by comprising a corner supporting mechanism and a main supporting mechanism, the corner supporting mechanism and a deep foundation pit enclosing purlin are fixed at an angle of 45 degrees, and the corner supporting mechanism comprises a plurality of steel pipe horizontal main beam steel supports, H-shaped steel horizontal straining beam steel supports and H-shaped steel stand columns. The H-shaped steel stand columns are vertically and fixedly connected with the steel pipe horizontal main beam steel supports. The main supporting mechanism comprises a plurality of steel pipe horizontal main beam steel supports, H-shaped steel horizontal straining beam steel supports and H-shaped steel stand columns, and one ends of the steel pipe horizontal main beam steel supports are fixed to the deep foundation pit through Z-shaped hanging plates and the fixed ends of the horizontal main beam steel supports and the deep foundation pit enclosing purlins. The other end of the H-shaped steel column is fixed with a deep foundation pit surrounding purlin through a Z-shaped hanging plate and a horizontal main beam steel support movable head, and the H-shaped steel column is vertically and fixedly connected with the steel pipe horizontal main beam steel support. The method has the advantages that assembly and standardization of deep foundation pit steel support construction are achieved, and the mounting and dismounting difficulty is lowered; and the disassembled and assembled standardized components can be reused, so that the construction cost is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of foundation pit support in the construction industry, and particularly relates to an assembled prestressed combined horizontal steel support structure system for a deep foundation pit. Background Art

[0002] The foundation pit steel support system is a structure that uses steel supports to form an internal support structure, and fully utilizes the characteristics of steel supports through various horizontal, vertical or broken-line structures. The steel support system consists of horizontal supports, vertical supports, and waist beams. The building support structure is mainly made of steel pipes, H-shaped steels, angle steels and other materials. It is widely used for temporary supports of various large-scale projects and frame supports during construction. The steel support structure has the advantages of strong bearing capacity, good durability, and convenient construction. It is an indispensable structure in modern construction projects. It has a wide range of uses, including house construction, bridge construction, tunnel engineering, water conservancy projects, subways, foundation pit enclosures, etc.

[0003] At present, the foundation pit steel support system is mainly divided into the following structures:

[0004] 1. Steel composite support belongs to the internal support system. H-shaped steel is used as the load-bearing beam. It includes a combination of standard components such as angle support, cross beam, column, tie rod, angle joint, pre-stressing and tightening device. It mainly adopts high-strength bolts to apply prestress to form a plane prestressed support system and a three-dimensional structure system. Its disadvantages: Since the main load-bearing structure of steel composite support adopts H-shaped steel, the horizontal support main beam and main beam, main beam and steel tie beam, main beam and steel column are connected by high-strength bolts. Although standardized components are used, the structural force belongs to the H-shaped steel combination, and the material selection is relatively simple. For complex or large foundation pits, the cross-sectional size of H-shaped steel is large and the nodes are complex, which increases the difficulty of installation and disassembly.

[0005] 2. Steel pipe and steel pipe combined support, the main beam and tie beam are steel pipe structures, the columns are steel, the main beam and the column are connected by corbels, and the tie beam and the main beam are connected by welding to form a frame support system. Its disadvantages are: the connection between the main beam and the tie beam adopts welding flange, or is connected by high-strength bolts, or the tie beam is directly welded to the main beam. Due to the high quality requirements of node welding, this not only increases the difficulty of construction and component installation and disassembly, but also cannot form standardized components for secondary use after disassembly. Summary of the invention

[0006] In order to solve the technical problems existing in the known technology, the utility model provides a deep foundation pit assembled prestressed combined horizontal steel support structure system which can meet different foundation pit forms, realizes the combination of different steel components and accessories, forms a force-bearing system of a plurality of steel component assembled combined steel support structures, and greatly improves the construction operability and safety.

[0007] The technical solution adopted by the utility model to solve the technical problems existing in the known technology is:

[0008] A prestressed composite horizontal steel support structure system for a deep foundation pit, characterized in that it comprises corner support mechanisms located at the four corners of the deep foundation pit and a main support mechanism located at the center of the deep foundation pit;

[0009] The corner support mechanism is fixed at an angle of 45° to the deep foundation pit purlin, and the corner support mechanism includes a plurality of steel tube horizontal main beam steel supports arranged in parallel with each other, an H-shaped steel horizontal tie beam steel support or a steel tube horizontal tie beam steel support fixedly connected between the plurality of steel tube horizontal main beam steel supports, and an H-shaped steel column, one end of the plurality of steel tube horizontal main beam steel supports is fixed to the deep foundation pit purlin corbel through a detachable Z-shaped hanging plate and a fixed end of the horizontal main beam steel support, and the other end is fixed to the deep foundation pit purlin corbel through a detachable Z-shaped hanging plate and a movable head of the horizontal main beam steel support, and the H-shaped steel column is vertically fixedly connected to the steel tube horizontal main beam steel support;

[0010] The main support mechanism located at the center of the deep foundation pit includes a plurality of steel tube horizontal main beam steel supports arranged in parallel with each other and located in the deep foundation pit, H-shaped steel horizontal tie beam steel supports or steel tube horizontal tie beam steel supports fixed between the plurality of steel tube horizontal main beam steel supports, and H-shaped steel columns. One end of the plurality of steel tube horizontal main beam steel supports is fixed to the deep foundation pit perimeter purlin through a detachable Z-shaped hanging plate and the fixed end of the horizontal main beam steel support at one end, and the other end is fixed to the deep foundation pit perimeter purlin through a detachable Z-shaped hanging plate and the movable head of the horizontal main beam steel support. The H-shaped steel column is vertically fixed to the steel tube horizontal main beam steel support.

[0011] The utility model can also adopt the following technical solutions:

[0012] Preferably, the steel pipe horizontal main beam steel support of the main support mechanism and the steel pipe horizontal main beam steel support of the corner support mechanism are both connected by steel pipes with flanges at their ends.

[0013] Preferably, the H-shaped steel column of the main support mechanism is fixed to the steel pipe horizontal main beam steel support through an H-shaped steel column connection unit.

[0014] Preferably, the steel tube horizontal main beam steel support and the H-shaped steel horizontal tie beam steel support of the corner support mechanism are interconnected and fixed by H-shaped steel tie beam conversion clamps, and the multiple steel tube horizontal main beam steel supports and steel tube horizontal tie beam steel supports of the main support mechanism that are arranged parallel to each other are interconnected and fixed by steel tube tie beam conversion clamps.

[0015] Preferably, the H-shaped steel tie beam conversion hoop and the steel tube tie beam conversion hoop include a square end plate, two semicircular plates, a stiffening plate and high-strength bolts, the square end plate is interconnected with the rectangular end plate of the H-shaped steel horizontal tie beam steel support by high-strength bolts, the two semicircular plates form a circle and embrace the steel tube horizontal main beam steel support, the hoop is fastened by high-strength bolts, the stiffening plate is welded to the square end plate and the semicircular plate, and the two semicircular plates are butt-jointed to form a complete stress node; the square end plate is fixedly connected to the steel tube horizontal tie beam steel support by high-strength bolts, the two semicircular plates are butt-jointed to form a circle and embrace the steel tube horizontal tie beam steel support, and the steel tube tie beam conversion hoop is fixed to the two semicircular plates by high-strength bolts.

[0016] The advantages and positive effects of the utility model are: since the utility model adopts the above-mentioned technical scheme, that is, by adopting Z-shaped hanging plates, fixed ends of steel tube horizontal main beam steel support pipes, active heads, H-shaped steel columns, steel tube horizontal main beam steel supports assembled from multiple steel pipes and flanges, H-shaped steel horizontal tie beam steel supports, steel tube horizontal tie beam steel supports, H-shaped steel tie beam conversion hoops and steel tube tie beam conversion hoops and other different standard component assembly combinations and connecting and fixing with foundation pit surrounding purlin corbels, a steel support structure force system for deep foundation pits is formed.

[0017] This not only realizes the assembly and standardization of deep foundation pit steel support construction, simplifies the installation and disassembly difficulty of deep foundation pit steel support; but also realizes the combination of different steel components and accessories, forming a variety of steel component assembly combined steel support structure force system, which raises the form of steel support structure system to a new level. In addition, each standardized component after disassembly can be reused, which greatly reduces the cost of deep foundation pit steel support construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the overall structure of the utility model;

[0019] Figure 2 yes Figure 1 AA section view;

[0020] Figure 3 This is a structural diagram of the connection between the steel support of the steel pipe horizontal main beam and the steel support of the steel pipe horizontal tie beam of the utility model;

[0021] Figure 4 yes Figure 3 A-direction view;

[0022] Figure 5 This is a structural diagram of the connection between the steel pipe horizontal main beam steel support and the H-shaped steel horizontal tie beam steel support of the utility model;

[0023] Figure 6 yes Figure 5 B-direction view;

[0024] Figure 7 This is a structural diagram of the connection between the steel support, Z-shaped hanging plate, movable head, fixed end and foundation pit purlin of the utility model;

[0025] Figure 8 It is the assembly drawing of the connection unit between the steel support of the horizontal main beam of the steel tube and the H-shaped steel column of the utility model;

[0026] Fig. 9 yes Figure 8 BB cross-sectional view;

[0027] Fig.10 It is a structural diagram of the Z-shaped hanging plate of the utility model;

[0028] Fig.11 yes Fig.10 Right view of;

[0029] Fig.12 It is a structural diagram of the flexible head of the utility model;

[0030] Fig.13 yes Fig.12 CC section view;

[0031] Fig.14 yes Fig.12 C-direction view.

[0032] In the figure: 1. H-shaped steel column; 2. H-shaped steel column connection unit; 2-1. Angle support; 2-2. Angle support connector; 3. Steel pipe horizontal main beam steel support; 4. H-shaped steel horizontal tie beam steel support; 5. Steel pipe horizontal tie beam steel support; 6. H-shaped steel tie beam conversion clamp; 7. Steel pipe tie beam conversion clamp; 7-1. Square end plate; 7-2. Semicircular plate; 7-3. Stiffening plate; 7-4. High-strength bolt; 8. Z-shaped hanging plate; 9. Active head; 10. Deep foundation pit purlin corbel; 11. Fixed end; 12. Flange; 13. Deep foundation pit purlin. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the present invention is further described in detail in conjunction with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] See also Figure 1-Figure 14 ,

[0035] A deep foundation pit assembled prestressed composite horizontal steel support structure system, comprising corner support mechanisms located at the four corners of the deep foundation pit and a main support mechanism located at the center of the deep foundation pit;

[0036] The main support mechanism located at the center of the deep foundation pit includes a plurality of steel pipe horizontal main beam steel supports 3 arranged in parallel with each other in the deep foundation pit, an H-shaped steel horizontal tie beam steel support 4 or a steel pipe horizontal tie beam steel support 5 fixed between the plurality of steel pipe horizontal main beam steel supports, and an H-shaped steel column 1. One end of the plurality of steel pipe horizontal main beam steel supports is fixed to the deep foundation pit purlin 13 (or purlin corbel) through a detachable Z-shaped hanging plate 8 and a fixed end 11 of the horizontal main beam steel support. The other end is fixed to the deep foundation pit purlin (or purlin corbel) through a detachable Z-shaped hanging plate 8 and a movable head 9. The Z-shaped hanging plate 8 is directly installed on the deep foundation pit purlin 13, and is fixed to the foundation pit purlin by using expansion bolts or high-strength bolts through the reserved holes on the top of the Z-shaped hanging plate. After the steel tube horizontal main beam steel support 3 and the steel tube horizontal tie beam steel support 5 are assembled to form a horizontal support, the H-shaped steel column 1 is vertically fixed to the steel tube horizontal main beam steel support 3, and the H-shaped steel column 1 of the main support mechanism is fixed to the steel tube horizontal main beam steel support 3 through the H-shaped steel column connection unit 2, thereby forming a supporting effect on the steel tube horizontal main beam steel support 3. The H-shaped steel column connection unit 2 includes an angle support 2-1 and an angle support connector 2-2. The angle support is composed of ∠100×10mm angle steel to form a triangular support. The angle support connector is made of angle steel. The angle support is welded to the H-shaped steel column according to the height and angle of the steel tube main beam horizontal support, and then the angle support connector is welded to the angle support, so that the angle support connector is closed around the steel tube horizontal main beam steel support 3, thereby limiting the horizontal displacement of the steel tube horizontal main beam steel support 3 after being subjected to force.

[0037] The steel pipe horizontal main beam steel support 3 of the main support mechanism is connected by a steel pipe with a flange 12 at its end. One end of the steel pipe horizontal main beam steel support 3 is fixed to the deep foundation pit purlin 13 (or purlin bracket) through a detachable Z-shaped hanging plate 8 and the fixed end 11 of the horizontal main beam steel support, and is fastened with high-strength bolts. The other end is connected to the active head 9 through a flange 12. After fastening with high-strength bolts, hydraulic jacks (oil jacks) are placed on both sides of the active head. Prestress is applied to the steel pipe horizontal main beam steel support 3 in stages according to design requirements to reach the design value. After voltage stabilization, a special plug is used to plug it to prevent prestress rebound.

[0038] The multiple mutually parallel steel tube horizontal main beam steel supports 3 and the steel tube horizontal tie beam steel supports 5 of the main support mechanism are connected and fixed to each other through steel tube tie beam conversion clamps 7. In addition, in order to make full use of the construction materials at the construction site, the multiple mutually parallel steel tube horizontal main beam steel supports 3 of the main support mechanism can also be connected and fixed to each other by H-shaped steel horizontal tie beam steel supports 4 and H-shaped steel tie beam conversion clamps 6.

[0039] The steel tube tie beam conversion hoop 7 and the H-shaped steel tie beam conversion hoop 6 are both constructed of the same components.

[0040] The H-beam tie beam conversion hoop 6 includes a square end plate 7-1, two semicircular plates 7-2, a stiffening plate 7-3 and high-strength bolts 7-4. The square end plate is interconnected with the rectangular end plate of the H-beam horizontal tie beam steel support by high-strength bolts. The H-beam tie beam conversion hoop adopts two semicircular plates to butt against each other to form a complete force node. The two semicircular plates form a circle and embrace the steel pipe horizontal main beam steel support 3. The hoop is firmly fastened by M24 high-strength bolts 7-4. The stiffening plate is welded to the square end plate and the semicircular plate, and plays a reinforcing role in the entire hoop.

[0041] The H-shaped steel tie beam support 4 is connected to the steel tie beam by the H-shaped steel tie beam conversion hoop 6 or the steel pipe tie beam conversion hoop 7. The steel pipe horizontal main beam steel support 3 is connected into a whole, so that the connection between different profiles forms a conversion node between different profiles, and the combination forms an overall force system of the deep foundation pit assembled prestressed combined horizontal steel support structure system.

[0042] The corner support mechanism is fixed at a 45° angle to the deep foundation pit purlin corbel 10. The corner support mechanism includes a plurality of steel tube horizontal main beam steel supports 3 arranged in parallel with each other, an H-shaped steel horizontal tie beam steel support 4 or a steel tube horizontal tie beam steel support 5 fixed between the plurality of steel tube horizontal main beam steel supports, and an H-shaped steel column 1. One end of the plurality of steel tube horizontal main beam steel supports is fixed to the deep foundation pit purlin corbel 10 through a detachable Z-shaped hanging plate 8 and a fixed end 11 of the horizontal main beam steel support, and the other end is fixed to the deep foundation pit purlin corbel through a detachable Z-shaped hanging plate and a flexible head 9. The H-shaped steel column 1 is vertically fixed to the steel tube horizontal main beam steel support 3. The steel tube horizontal main beam steel supports 3 of the corner support mechanism are all connected by steel pipes with flanges at their ends.

[0043] The Z-shaped hanging plate 8 is directly installed on the deep foundation pit purlin corbel 10, and fixed on the deep foundation pit purlin corbel by using expansion bolts or high-strength bolts through the reserved holes on the top of the Z-shaped hanging plate. After the steel tube horizontal main beam steel support 3 and the H-shaped steel horizontal tie beam steel support 4 are assembled to form a horizontal support, the H-shaped steel column 1 is vertically fixed to the steel tube horizontal main beam steel support 3, and the H-shaped steel column 1 of the corner support mechanism is fixed to the steel tube horizontal main beam steel support 3 through the H-shaped steel column connection unit 2, thereby forming a supporting effect on the steel tube horizontal main beam steel support 3. The H-shaped steel column connection unit 2 includes an angle support 2-1 and an angle support connector 2-2. The angle support is composed of ∠100×10mm angle steel to form a triangular support. The angle support connector is made of angle steel. The angle support is welded to the H-shaped steel column according to the height and angle of the horizontal support of the steel pipe main beam, and then the angle support connector is welded to the angle support so that the angle support connector forms a closure around the steel pipe horizontal main beam steel support 3, thereby limiting the horizontal displacement of the steel pipe horizontal main beam steel support 3 after being subjected to force.

[0044] The steel tube horizontal main beam steel support 3 of the corner support mechanism is connected by a steel tube with a flange 12 at the end. One end of the steel tube horizontal main beam steel support 3 is fixed to the deep foundation pit purlin corbel 10 through a detachable Z-shaped hanging plate and the fixed end of the horizontal main beam steel support, and the other end is fixed to the deep foundation pit purlin corbel through a detachable Z-shaped hanging plate 8 and an active head 9. After fastening with high-strength bolts, hydraulic jacks (oil jacks) are placed on both sides of the active head. Prestress is applied to the steel tube horizontal main beam steel support 3 in stages according to design requirements to reach the design value. After voltage stabilization, it is tightened with a special iron plug to prevent prestress rebound.

[0045] The multiple mutually parallel steel tube horizontal main beam steel supports 3 and the H-shaped steel horizontal tie beam steel supports 4 of the corner support mechanism are mutually connected and fixed through the H-shaped steel tie beam conversion clamp 6. In addition, in order to make full use of the construction materials at the construction site, the multiple mutually parallel steel tube horizontal main beam steel supports 3 of the corner support mechanism can also be mutually fixedly connected by using steel tube horizontal tie beam steel supports 5 through steel tube tie beam conversion clamp 7.

[0046] The embodiments described in the drawings of the present invention are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

Claims

1. A deep foundation pit prestressed composite horizontal steel support structure system, characterized by: It includes corner support mechanisms located at the four corners of the deep foundation pit and a main support mechanism located at the center of the deep foundation pit; The corner support mechanism is fixed at an angle of 45° to the deep foundation pit purlin, and the corner support mechanism includes a plurality of steel tube horizontal main beam steel supports arranged in parallel with each other, an H-shaped steel horizontal tie beam steel support or a steel tube horizontal tie beam steel support fixedly connected between the plurality of steel tube horizontal main beam steel supports, and an H-shaped steel column, one end of the plurality of steel tube horizontal main beam steel supports is fixed to the deep foundation pit purlin corbel through a detachable Z-shaped hanging plate and a fixed end of the horizontal main beam steel support, and the other end is fixed to the deep foundation pit purlin corbel through a detachable Z-shaped hanging plate and a movable head of the horizontal main beam steel support, and the H-shaped steel column is vertically fixedly connected to the steel tube horizontal main beam steel support; The main support mechanism located at the center of the deep foundation pit includes a plurality of steel tube horizontal main beam steel supports arranged in parallel with each other and located in the deep foundation pit, H-shaped steel horizontal tie beam steel supports or steel tube horizontal tie beam steel supports fixed between the plurality of steel tube horizontal main beam steel supports, and H-shaped steel columns. One end of the plurality of steel tube horizontal main beam steel supports is fixed to the deep foundation pit perimeter purlin through a detachable Z-shaped hanging plate and the fixed end of the horizontal main beam steel support at one end, and the other end is fixed to the deep foundation pit perimeter purlin through a detachable Z-shaped hanging plate and the movable head of the horizontal main beam steel support. The H-shaped steel column is vertically fixed to the steel tube horizontal main beam steel support.

2. The deep foundation pit prestressed composite horizontal steel support structure system according to claim 1, characterized in that: The steel pipe horizontal main beam steel support of the main support mechanism and the steel pipe horizontal main beam steel support of the corner support mechanism are both connected by steel pipes with flanges at their ends.

3. The deep foundation pit prestressed composite horizontal steel support structure system according to claim 1 is characterized by: The H-shaped steel column of the main support mechanism and the steel pipe horizontal main beam steel support are fixed by an H-shaped steel column connection unit.

4. The deep foundation pit prestressed composite horizontal steel support structure system according to claim 1, characterized in that: The steel tube horizontal main beam steel support and the H-shaped steel horizontal tie beam steel support of the corner support mechanism are connected and fixed to each other through H-shaped steel tie beam conversion clamps; the multiple steel tube horizontal main beam steel supports and the steel tube horizontal tie beam steel supports of the main support mechanism are connected and fixed to each other through steel tube tie beam conversion clamps.

5. The deep foundation pit prestressed composite horizontal steel support structure system according to claim 4, characterized in that: The H-shaped steel tie beam conversion hoop and the steel tube tie beam conversion hoop include a square end plate, two semicircular plates, a stiffening plate and high-strength bolts. The square end plate is interconnected with the rectangular end plate of the H-shaped steel horizontal tie beam steel support through high-strength bolts. The two semicircular plates form a circle and embrace the steel tube horizontal main beam steel support. The hoop is fastened by high-strength bolts. The stiffening plate is welded to the square end plate and the semicircular plate. The two semicircular plates are butt-jointed with each other to form a complete stress node. The square end plate is fixedly connected to the steel tube horizontal tie beam steel support through high-strength bolts. The two semicircular plates are butt-jointed with each other to form a circle and embrace the steel tube horizontal tie beam steel support, and the steel tube tie beam conversion hoop is fixed to the two semicircular plates by high-strength bolts.

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