A steel structure foundation pit protection
Through the combined structure of H-shaped steel enclosing piles and water stop plates, combined with the prestressed support of V-shaped connecting plates and inclined support rods, the problems of long construction period of foundation pit enclosing and the inability to reuse materials are solved, and the construction period is shortened and the reusability of materials to form efficient and feasible all-steel structure foundation pit enclosure.
Patent Information
- Application Number
- CN202010696445.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-07-20
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2040-07-20
AI Technical Summary
The construction period of the existing foundation pit enclosure structure is long, the deformation cannot be adjusted, and the materials cannot be reused, resulting in extended construction period and high costs.
Enclosing piles made of H-shaped steel form a continuous wall by pile driving, and a water stop plate is set between two adjacent H-shaped steels. Finally, a ring beam is set on the top of the continuous wall to form a foundation pit enclosure of the all-steel structure. Prestressed support is combined with V-shaped connecting plate and oblique support rod to ensure structural stability and recyclability.
It has achieved the shortening of the construction cycle of foundation pit enclosure and the reusability of materials, overcome the problems of inaccurate deformation of traditional concrete enclosure and the inability to reuse the materials. It has the advantages of simple structure, convenient practicality and short construction cycle.
Smart Images
Figure CN111719567B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to foundation pit construction in the technical field of civil engineering, in particular to a foundation pit enclosure with a steel structure. Background Art
[0002] Deep foundation pit excavation is an important construction procedure for underground structures of modern large buildings. The existing technology of foundation pit enclosure and support mostly adopts reinforced concrete structure. The existing problems are that the enclosure construction period of reinforced concrete structure is long, the deformation of enclosure cannot be adjusted during the foundation pit construction, and the removal of the enclosure ring beam and continuous wall is very labor-intensive and cannot be recycled. In order to overcome the above defects, shorten the construction period and save costs, the research and development of foundation pit enclosure using all-steel structure is underway. With the continuous advancement of research and development, it will become a reality that steel structure replaces reinforced concrete to complete the enclosure of foundation pit. Summary of the invention
[0003] The purpose of the present invention is to provide a steel structure foundation pit enclosure in view of the deficiencies in the prior art. The present invention arranges the enclosure piles made of H-shaped steel in sequence by piling to form a continuous wall, and arranges a water stop plate between two adjacent H-shaped steels. Finally, a ring beam is arranged on the top of the continuous wall formed by the H-shaped steel to complete the foundation pit enclosure of the entire steel structure. The present invention can carry out foundation pit excavation after the foundation pit enclosure construction is completed, overcoming the defects of traditional concrete enclosures such as long maintenance period, inability to correct deformation and non-reusable construction materials. The present invention has the advantages of simple structure, practical convenience, short construction period and recyclability.
[0004] The specific technical solution for achieving the purpose of the present invention is:
[0005] A steel structure foundation pit retaining, which features include retaining piles, water stop plates, ring beams and V-shaped connecting plates;
[0006] The retaining pile is made of H-shaped steel, and one end of the H-shaped steel is provided with a sharp corner;
[0007] The water stop plate is a strip plate with an "Ω"-shaped cross section, and a convex circle at the top, a neck in the middle and bottom edges at both sides are symmetrically arranged on the cross section, and flanges are arranged on the bottom edges;
[0008] The ring beam is composed of channel steel, vertical plates, panels, end plates and reinforcing rib plates; the vertical plates are two pieces, the channel steel, vertical plates and panels are of equal length and arranged along the axial direction, the channel steel opening is arranged at the bottom facing downward, the panel is arranged parallel to the top of the channel steel, and the two vertical plates are arranged between the channel steel and the panel; the end plates and reinforcing rib plates are several pieces, which are arranged on the outside of the vertical plates and between the channel steel and the panel in sequence;
[0009] The V-shaped connecting plates are several pieces, and the V-shaped connecting plates are arranged on the vertical plates and the channel steels on one side of the ring beam.
[0010] The sharp corners of the several H-shaped steels of the retaining piles are arranged in sequence downward; the water stop plate is vertically arranged between two adjacent H-shaped steels, and the convex circle of the water stop plate is located on the outside of the two wings of the H-shaped steel, the neck is located between the two wings of the H-shaped steel, and the bottom edge is located on the inside of the two wings of the H-shaped steel;
[0011] The ring beam is horizontally arranged above the retaining piles, and the channel steel of the ring beam is buckled on the tops of several H-shaped steels arranged in sequence.
[0012] The end connecting plates on the ring beam are arranged at both ends of the ring beam, and a plurality of bolt holes are arranged on the end connecting plates.
[0013] The V-shaped connecting plate is composed of two connecting plates arranged in a V shape, and a rib plate is arranged between the two connecting plates.
[0014] A pad is provided between the V-shaped connecting plate and the vertical plate on one side of the ring beam, and the V-shaped connecting plate is connected to the vertical plate and the channel steel on one side of the ring beam by welding or bolts.
[0015] The present invention arranges the retaining piles made of H-shaped steel in sequence by pile driving to form a continuous wall, and arranges a water stop plate between two adjacent H-shaped steels. Finally, a ring beam is arranged on the top of the continuous wall formed by the H-shaped steel to complete the foundation pit retaining of the full steel structure. The present invention can carry out foundation pit excavation after the foundation pit retaining construction is completed, overcoming the defects of traditional concrete retaining that the maintenance period is long, deformation cannot be corrected and the construction materials cannot be reused. The present invention has the advantages of simple structure, practical convenience, short construction period and recyclable reuse. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the present invention;
[0017] Figure 2 for Figure 1 Side view of
[0018] Figure 3 for Figure 1 A--Schematic diagram of the structure of section A;
[0019] Figure 4 for Figure 3 A schematic diagram of the structure of the local enlargement at B;
[0020] Figure 5 It is a schematic diagram of the structure of the retaining pile of the present invention;
[0021] Figure 6 It is a structural schematic diagram of the water stop plate of the present invention;
[0022] Figure 7 It is a structural schematic diagram of the ring beam of the present invention;
[0023] Figure 8 for Figure 7 Schematic diagram of the C-direction structure;
[0024] Fig. 9 for Figure 7 The structural diagram of the D--D section;
[0025] Fig.10 It is a schematic diagram of the use state of the present invention. DETAILED DESCRIPTION
[0026] See also Figure 1 , Figure 2 , Figure 3 The present invention includes a retaining pile 1, a water stop plate 2, a ring beam 3 and a V-shaped connecting plate 4.
[0027] See also Figure 1 , Figure 2 , Figure 5 The retaining pile 1 is made of H-shaped steel, and a sharp corner 12 is provided at one end of the H-shaped steel.
[0028] See also Figure 1 , Figure 2 , Figure 6 The water stop plate 2 is a strip plate with an Ω-shaped cross section, and a convex circle 21 at the top, a neck 24 in the middle and bottom edges 22 at both sides are symmetrically arranged on the cross section, and a flange 23 is arranged on the bottom edge 22.
[0029] See also Figure 1 , Figure 7 , Figure 8 , Fig. 9 The ring beam 3 is composed of a channel steel 31, a vertical plate 32, a panel 33, an end connecting plate 34 and a reinforcing rib plate 35; the vertical plate 32 is two pieces, and the channel steel 31, the vertical plate 32 and the panel 33 are of equal length and arranged along the axial direction, the channel steel 31 is opened downward at the bottom, the panel 33 is arranged parallel to the top of the channel steel 31, and the two vertical plates 32 are arranged between the channel steel 31 and the panel 33; the end connecting plate 34 and the reinforcing rib plate 35 are several pieces, which are arranged on the outside of the vertical plate 32 and between the channel steel 31 and the panel 33 in sequence.
[0030] See also Figure 1 , Figure 2 The V-shaped connecting plates 4 are several pieces, and the V-shaped connecting plates 4 are arranged on the vertical plate 32 and the channel steel 31 on one side of the ring beam 3.
[0031] See also Figure 1 , Figure 2 , Figure 3 , Figure 4The sharp corners 12 of the several H-shaped steels of the retaining pile 1 are arranged in sequence downward; the water stop plate 2 is vertically arranged between two adjacent H-shaped steels, and the convex circle 21 of the water stop plate 2 is located on the outer side of the two wings of the H-shaped steel, the neck 24 is located between the two wings of the H-shaped steel, and the bottom edge 22 is located on the inner side of the two wings of the H-shaped steel;
[0032] The ring beam 3 is horizontally arranged above the retaining pile 1, and the channel steel 31 of the ring beam 3 is buckled on the top of several H-shaped steels arranged in sequence.
[0033] See also Figure 7 , Figure 8 , Fig. 9 The end connecting plates 34 on the ring beam 3 are arranged at both ends of the ring beam 3, and a plurality of bolt holes are arranged on the end connecting plates 34.
[0034] See also Figure 1 , Figure 2 The V-shaped connecting plate 4 is composed of two connecting plates arranged in a V shape, and a rib plate is provided between the two connecting plates.
[0035] See also Figure 1 , Figure 2 , Figure 7 , Fig. 9 A pad is provided between the V-shaped connecting plate 4 and the vertical plate 32 on one side of the ring beam 3, and the V-shaped connecting plate 4 is welded or bolted to the vertical plate 32 and the channel steel 31 on one side of the ring beam 3.
[0036] The present invention works like this: Example
[0037] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 7 The present invention is used for foundation pit enclosure of steel structure. The present invention arranges the enclosure piles 1 made of H-shaped steel in sequence by piling to form a continuous wall, and also arranges a water stop plate 2 between two adjacent H-shaped steels by piling. Finally, a ring beam 3 is arranged on the top of the continuous wall formed by the H-shaped steel to complete the foundation pit enclosure of the full steel structure.
[0038] In order to facilitate driving the retaining pile 1 made of H-shaped steel into the foundation pit, a sharp corner 12 is provided at one end of the H-shaped steel.
[0039] During the completion of the continuous wall, in order to facilitate the H-shaped steel and the water stop plate 2 of the present invention to be alternately driven into the foundation pit in sequence, the present invention designs the cross-section of the water stop plate 2 to be "Ω" shaped, and the cross-section is symmetrically provided with a convex circle 21 on the top, a neck 24 in the middle and bottom edges 22 on both sides, and a flange 23 is provided on the bottom edge 22. After every two adjacent H-shaped steels are driven into the foundation pit, the water stop plate 2 is inserted between the two adjacent H-shaped steels. When inserted, the convex circle 21 of the water stop plate 2 is located on the outer side of the two wings of the H-shaped steel, the neck 24 is located between the two wings of the H-shaped steel, and the bottom edge 22 is located on the inner side of the two wings of the H-shaped steel. At this time, the water stop plate 2 has the elasticity to expand to both sides and will position itself, and the phenomenon of compression rod instability will not occur.
[0040] When a section of the continuous wall is completed, a ring beam 3 is set on the top of the continuous wall composed of H-shaped steels, and the V-shaped connecting plate 4 on the ring beam 3 is facing the foundation pit, so that the channel steel 31 of the ring beam 3 is buckled and welded to the top of several H-shaped steels arranged in sequence to form the continuous wall.
[0041] To ensure that both sides of the channel steel 31 on the ring beam 3 are tightly connected with the two outer sides of the H-shaped steel arranged into a continuous wall, during construction, the top of the water stop plate 2 should be lower than the top of the H-shaped steel, and the height difference is the depth of the side of the channel steel 31.
[0042] As the continuous wall is extended, subsequent ring beams 3 are connected in sequence, and the connection between the ring beams 3 can be connected by bolts through the bolt holes of the end connecting plate 34. Example
[0043] See also Figure 1 , Figure 2 , Figure 3 , Figure 7 , Fig.10 In order to prevent the continuous wall from displacement and deformation, the present invention is used in conjunction with the inclined support rod 5, and the inclined support rod 5 is arranged between the ring beam and the foundation pit. First, the end of the anchor pipe on the inclined support rod 5 is inserted into the soil below the bottom of the foundation pit according to the design requirements, and the end of the anchor pipe is grouting by high-pressure grouting to form a concrete pile foundation to improve the bearing capacity of the inclined support rod 5; finally, the support seat of the inclined support rod 5 is connected to the V-shaped connecting plate 4 of the ring beam. The inclined support rod 5 is a prestressed support rod with a jack. Through the external force of the inclined support rod, prestress is applied to the ring beam 3 to maintain the stability of the continuous wall, or the displacement and deformation of the continuous wall are corrected by the inclined support rod.
[0044] See also Figure 1 , Figure 2 , Figure 3 , Fig. 9 , Fig.10Since the V-shaped connecting plate 4 is arranged on the vertical plate 32 and the channel steel 31 on one side of the ring beam 3, when the inclined support rod 5 applies prestress to the ring beam 3, the ring beam 3 produces a corrective displacement while the channel steel 31 fastened to the top of several H-shaped steels arranged in sequence to form a continuous wall drives the continuous wall to move synchronously, thereby correcting the displacement and deformation of the continuous wall.
Claims
1. A foundation pit enclosure with a steel structure, characterized in that: It comprises retaining piles (1), water stop plates (2), ring beams (3) and V-shaped connecting plates (4); The retaining pile (1) is made of H-shaped steel, and one end of the H-shaped steel is provided with a sharp corner (12); The water stop plate (2) is a strip plate with an Ω-shaped cross section, and is symmetrically provided with a convex circle (21) at the top, a neck (24) in the middle, and bottom edges (22) at both sides, and the bottom edges (22) are provided with flanges (23); The ring beam (3) is composed of a channel steel (31), a vertical plate (32), a face plate (33), an end plate (34) and a reinforcing rib plate (35); the vertical plate (32) is composed of two pieces, the channel steel (31), the vertical plate (32) and the face plate (33) are of equal length and are arranged axially, the channel steel (31) is opened downward and arranged at the bottom, the face plate (33) is arranged parallel to the top of the channel steel (31), and the two vertical plates (32) are arranged between the channel steel (31) and the face plate (33); the end plate (34) and the reinforcing rib plate (35) are composed of several pieces, which are arranged on the outer side of the vertical plate (32) and between the channel steel (31) and the face plate (33) in sequence; The V-shaped connecting plates (4) are multiple pieces, and the V-shaped connecting plates (4) are arranged on the vertical plates (32) and the channel steel (31) on one side of the ring beam (3); The sharp corners (12) of the several H-shaped steels of the retaining pile (1) are arranged in sequence with their tips facing downwards; the water stop plate (2) is vertically arranged between two adjacent H-shaped steels, and the convex circle (21) of the water stop plate (2) is located on the outer sides of the two wings of the H-shaped steel, the neck (24) is located between the two wings of the H-shaped steel, and the bottom edge (22) is located on the inner sides of the two wings of the H-shaped steel; The ring beam (3) is horizontally arranged above the retaining pile (1), and the channel steel (31) of the ring beam (3) is buckled on the top of a plurality of H-shaped steels arranged in sequence.
2. The foundation pit enclosure of a steel structure according to claim 1, characterized in that: The end connecting plates (34) on the ring beam (3) are arranged at both ends of the ring beam (3), and a plurality of bolt holes are arranged on the end connecting plates (34).
3. The foundation pit enclosure of a steel structure according to claim 1, characterized in that: The V-shaped connecting plate (4) is composed of two connecting plates arranged in a V shape, and a rib plate is provided between the two connecting plates.
4. The foundation pit enclosure of a steel structure according to claim 1, characterized in that: A pad is provided between the V-shaped connecting plate (4) and the vertical plate (32) on one side of the ring beam (3), and the V-shaped connecting plate (4) is connected to the vertical plate (32) and the channel steel (31) on one side of the ring beam (3) by welding or bolts.