A structure of a single-sided support structure

Abstract

The utility model relates to a kind of supporting structures, belong to building construction technology field, specifically a structure unilateral supporting structure, including being set in inclined throw support foundation of first pouring bottom plate upper, the inclined throw support foundation is provided with lattice column inclined throw support, the lattice column inclined throw support covers on reserved island, still include the column top embedded plate being set in the top of lattice column inclined throw support, the top of lattice column inclined throw support is connected with public wall by column top embedded plate;Column bottom embedded plate being set in the bottom of lattice column inclined throw support, the bottom of lattice column inclined throw support is connected with inclined throw support foundation by column bottom embedded plate;The utility model has the advantages of convenient construction, effectively avoid the deformation of existing structure, little influence to new structure construction, construction period is short etc.;Solved the problem of not affecting new structure and existing structure to carry out structure connection while unilateral earthwork excavation is ensured that existing structure does not occur serious displacement in existing structure side, public outer wall.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a single-sided support structure for existing structures. Background Technology

[0002] In modern underground structure construction, some projects cannot be completed in one go due to factors such as investment and regional limitations, and need to be completed in stages. In the later stages of construction, the underground structure being constructed in a later stage may share a wall with the structure constructed in the earlier stages, and the newly constructed foundation slab needs to be connected to the existing structure's exterior wall. During the later earthwork excavation stage, since the soil on both sides of the existing structure has already been backfilled, if only one side is excavated to the foundation, the existing structure will experience severe displacement due to the soil pressure on the other side, potentially affecting structural safety. If the soil is excavated and unloaded simultaneously on the other side of the existing structure, it will increase the construction period and cost. Because the existing structure's exterior wall and the new structure share a wall, it is impossible to use retaining piles for support on the newly excavated side. Therefore, there is a need for a method that allows for unilateral excavation while ensuring that the existing structure does not experience severe displacement and does not affect the construction of the new structure. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model proposes a single-sided support structure for existing structures, which has advantages such as convenient construction, effective prevention of deformation of existing structures, minimal impact on the construction of new structures, and short construction period. It also solves the problem of ensuring that the existing structure does not undergo serious displacement during single-sided earthwork excavation on the side of the existing structure, while not affecting the structural connection between the new structure and the existing structure, and the shared exterior wall.

[0004] The technical solution to achieve the purpose of this utility model is: an existing single-sided support structure, including a sloping brace foundation set above the pre-cast base plate, a lattice column sloping brace set on the sloping brace foundation, the lattice column sloping brace covering the reserved soil island, and further including;

[0005] An embedded plate is installed at the top of the inclined bracing of the lattice column, and the top of the inclined bracing of the lattice column is connected to the common wall through the embedded plate.

[0006] An embedded plate is installed at the bottom of the inclined brace of the lattice column, and the bottom end of the inclined brace of the lattice column is connected to the foundation of the inclined brace through the embedded plate.

[0007] In some embodiments, the lattice column inclined bracing includes double angle steel corner bracing, steel gusset plates and internal bracing. The double angle steel corner bracing is made by stacking and welding two angle steels. The top of the internal angle steel of the double angle steel corner bracing is planed flat, and the perimeter of the two angle steels is fully welded.

[0008] In some embodiments, the steel gusset plate is a square steel plate, and the inner support is a trapezoidal steel plate.

[0009] In some embodiments, the inclined bracing foundation includes a foundation slab, main reinforcement bars of the inclined bracing foundation, and stirrups of the inclined bracing foundation. The foundation slab is the base slab of the structure to be constructed and protrudes from a section of the lattice column to form the inclined bracing foundation. A construction joint is left on one side of the inclined bracing foundation, and the reinforcement bars of the base slab are extended to facilitate the connection of the subsequent cast-in-place base slab. The main reinforcement bars and stirrups of the inclined bracing foundation are both foundation reinforcements.

[0010] In some embodiments, the column top embedded plate includes a column top embedded steel plate, a column top stiffening rib, a column top bolt hole, and expansion bolts. The column top embedded steel plate is a square steel plate, the column top stiffening rib is a square steel plate with two opposite corners missing, and the column top bolt hole is a through circular hole evenly distributed on the column top embedded steel plate.

[0011] In some embodiments, the column base embedded steel plate includes a column base embedded steel plate, column base stiffening ribs, and embedded reinforcing bars, wherein the embedded reinforcing bars are equally spaced reinforcing bars welded to the column base embedded steel plate.

[0012] Compared with existing technologies, the significant advantages of this invention are:

[0013] In this invention, during the excavation of the new structure, a counter-pressure soil layer is reserved on one side of the existing structure. After the soil is excavated to the foundation of the first-cast base slab, the first-cast base slab portion is constructed. Simultaneously, a construction joint is left at the reserved soil island location, and a sloping brace foundation is constructed at the construction joint. Pre-embedded steel plates at the column base are placed on the sloping brace foundation. After the first-cast base slab is completed, the lattice column sloping brace is constructed, and the lattice column sloping brace is welded to the pre-embedded steel plate at the column base. Stiffening ribs are used around the lattice column to weld and connect it to the pre-embedded steel plate at the column base, strengthening the sloping brace support. The pre-embedded steel plate at the top of the sloping brace column is connected to the existing structure's exterior wall using expansion bolts. Similarly, stiffening ribs are used around the lattice column to weld and connect it to the pre-embedded steel plate at the column base, strengthening the sloping brace support. Internal bracing steel plates are welded at intervals at the four corners of the lattice column to prevent deformation. The lattice columns are arranged at intervals along the existing exterior wall. After the lattice columns with diagonal bracing are installed, the reserved soil islands are cleared, and then the base slab is poured after construction. The lattice columns with diagonal bracing can only be removed after the basement structure is completed and the existing structure is laterally supported. The foundation of the diagonal bracing can be removed. This method has the advantages of effectively avoiding deformation of the existing structure, having little impact on the construction of the new structure, and having a short construction period.

[0014] This solution addresses the issue of ensuring that the existing structure does not undergo severe displacement during unilateral earthwork excavation on the side of the existing structure, while simultaneously preventing structural connection between the new and existing structures and the shared exterior wall. Attached Figure Description

[0015] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the main structure provided in one embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of a lattice column inclined bracing structure provided in one embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the inclined bracing foundation structure provided in one embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the column top embedded plate structure provided in one embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the column base embedded plate structure provided in one embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the lattice column inclined bracing provided in one embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the cross-sectional structure of the double-angle steel corner support provided in one embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the cross-sectional structure of the stiffening rib provided in one embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Inclined bracing foundation; 101. Foundation base plate; 102. Main reinforcement of inclined bracing foundation; 103. Stirrups of inclined bracing foundation; 2. Inclined bracing of lattice column; 201. Double angle steel corner bracing; 202. Steel gusset plate; 203. Internal bracing; 3. Column top embedded plate; 301. Column top embedded steel plate; 302. Column top stiffening rib; 303. Column top bolt hole; 304. Expansion bolt; 4. Column bottom embedded plate; 401. Column bottom embedded steel plate; 402. Column bottom stiffening rib; 403. Embedded steel bar. Detailed Implementation

[0026] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0027] This utility model provides an improved single-sided support structure for an existing structure. The technical solution of this utility model is as follows:

[0028] like Figure 1and Figure 2 As shown, an existing single-sided support structure includes a sloping brace foundation 1 set above the pre-cast base slab, a lattice column sloping brace 2 set on the sloping brace foundation 1, the lattice column sloping brace 2 covering the reserved soil island, and also includes;

[0029] The top of the lattice column inclined brace 2 is set at the top of the column top embedded plate 3, and the top of the lattice column inclined brace 2 is connected to the common wall through the column top embedded plate 3.

[0030] The column base embedded plate 4 is installed at the bottom of the lattice column inclined brace 2. The bottom end of the lattice column inclined brace 2 is connected to the inclined brace foundation 1 through the column base embedded plate 4.

[0031] like Figure 6 and Figure 7 As shown, in one embodiment, the lattice column inclined bracing 2 includes a double angle steel angle support 201, a steel gusset plate 202, and an inner support 203. The double angle steel angle support 201 is made by stacking and welding two angle steels. The top of the angle steel inside the double angle steel angle support 201 is planed flat, and the perimeter of the two angle steels is fully welded. The angle steel selected for the double angle steel support is not lower than L180×18 type angle steel, and the height of the weld joint of the stacked two angle steels is not less than 10mm. During the construction of the lattice column foundation, the column bottom embedded plate 4 is pre-embedded, and the lattice column is welded to the column bottom embedded plate 4. At the same time, two square stiffening steel plates with missing corners are used to weld the lattice column to the column bottom embedded plate 4 to form a whole. The thickness of the inner support 203, the column top embedded steel plate 301, and the column bottom embedded steel plate 401 is not less than 20mm.

[0032] In one embodiment, the steel gusset plate 202 is a square steel plate with a thickness of not less than 12 mm, and the inner support 203 is a trapezoidal steel plate with a thickness of not less than 14 mm for the stiffening rib steel plate.

[0033] like Figure 3 As shown, in one embodiment, the inclined bracing foundation 1 includes a foundation slab 101, inclined bracing foundation main reinforcement 102, and inclined bracing foundation stirrups 103. The foundation slab 101 is the base slab of the structure to be constructed and protrudes from a section of the lattice column to form the inclined bracing foundation 1. A construction joint is left on one side of the inclined bracing foundation 1, and the base slab reinforcement is extended to facilitate the connection of the subsequent cast-in-place base slab. The inclined bracing foundation main reinforcement 102 and the inclined bracing foundation stirrups 103 are both foundation reinforcements.

[0034] like Figure 4 and Figure 8As shown, in one embodiment, the column top embedded plate 3 includes a column top embedded steel plate 301, a column top stiffening rib 302, a column top bolt hole 303, and an expansion bolt 304. The column top embedded steel plate 301 is a square steel plate, the column top stiffening rib 302 is a square steel plate with two opposite corners missing, the column top bolt hole 303 is a through circular hole evenly distributed on the column top embedded steel plate 301, and the expansion bolt 304 is an M25 expansion bolt 304 with a length of 300mm.

[0035] like Figure 5 As shown, in one embodiment, the column base embedded steel plate 401 includes a column base embedded steel plate 401, a column base stiffening rib 402, and embedded reinforcing bars 403. The embedded reinforcing bars 403 are equally spaced reinforcing bars welded to the column base embedded steel plate 401, and the diameter of the embedded reinforcing bars 403 welded to the column base embedded steel plate 401 is not less than 20mm. The column base stiffening rib 402 is also processed to the same specification as the column top stiffening rib 302. The column base embedded steel plate 401 and the column top embedded steel plate 301 are square steel plates of the same specification and shape.

[0036] The specific working method is as follows: During the excavation of the new structure, a counter-pressure soil layer is reserved on one side of the existing structure. After the soil is excavated to the foundation of the first-cast base slab, the first-cast base slab portion is constructed. At the same time, a construction joint is left at the reserved soil island location, and a sloping brace foundation 1 is constructed at the construction joint. The pre-embedded steel plate 401 at the column base is embedded on the sloping brace foundation 1. After the first-cast base slab is completed, the lattice column sloping brace 2 is constructed. The lattice column sloping brace 2 is welded to the pre-embedded steel plate 401 at the column base, and stiffening is used. Ribs are welded around the lattice column to the pre-embedded steel plate 401 at the column base, reinforcing the diagonal bracing. The pre-embedded steel plate 301 at the top of the diagonal bracing column is connected to the existing structural exterior wall using expansion bolts 304. Simultaneously, the diagonal bracing of the lattice column is welded to the pre-embedded steel plate 301 at the column top. Similarly, stiffening ribs are welded around the lattice column to the pre-embedded steel plate at the column base, reinforcing the diagonal bracing. Internal bracing steel plates are welded at intervals at the four corners of the lattice column to prevent deformation. The lattice columns are arranged at intervals along the existing structural exterior wall. After the diagonal bracing lattice columns are completed, the reserved soil islands are cleared, and then the base slab is poured after construction. The diagonal bracing 2 can only be removed after the basement structure construction is completed and provides lateral support to the existing structure, and the diagonal bracing foundation 1 can be removed.

[0037] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A single-sided support structure for an existing structure, comprising an inclined bracing foundation (1) disposed above a pre-cast base slab, characterized in that: A lattice column sloping brace (2) is provided on the inclined brace foundation (1), the lattice column sloping brace (2) covers the reserved soil island, and also includes; The column top embedded plate (3) is set at the top of the lattice column inclined brace (2), and the top of the lattice column inclined brace (2) is connected to the common wall through the column top embedded plate (3). The column base embedded plate (4) is set at the bottom end of the lattice column inclined brace (2), and the bottom end of the lattice column inclined brace (2) is connected to the inclined brace foundation (1) through the column base embedded plate (4).

2. The existing single-sided support structure according to claim 1, characterized in that: The lattice column inclined bracing (2) includes double angle steel corner bracing (201), steel gusset plate (202) and inner bracing (203). The double angle steel corner bracing (201) is made of two stacked angle steels welded together. The top of the inner angle steel of the double angle steel corner bracing (201) is planed flat, and the perimeter of the two angle steels is fully welded.

3. The existing structure with single-sided support structure according to claim 2, characterized in that: The steel gusset plate (202) is a square steel plate, and the inner support (203) is a trapezoidal steel plate.

4. The existing single-sided support structure according to claim 1, characterized in that: The inclined bracing foundation (1) includes a foundation slab (101), main reinforcement bars (102) and stirrups (103). The foundation slab (101) is the base slab of the structure to be constructed and protrudes from a section of the lattice column to form the inclined bracing foundation (1). A construction joint is left on one side of the inclined bracing foundation (1), and the base slab reinforcement bars are extended to facilitate the connection of the later-cast base slab. The main reinforcement bars (102) and stirrups (103) of the inclined bracing foundation are both foundation reinforcements.

5. A single-sided support structure for an existing structure according to claim 1, characterized in that: The column top embedded plate (3) includes a column top embedded steel plate (301), a column top stiffening rib (302), a column top bolt hole (303), and an expansion bolt (304). The column top embedded steel plate (301) is a square steel plate, the column top stiffening rib (302) is a square steel plate with two opposite corners missing, and the column top bolt hole (303) is a through circular hole evenly distributed on the column top embedded steel plate (301).

6. A single-sided support structure for an existing structure according to claim 1, characterized in that: The column base embedded steel plate (401) includes a column base embedded steel plate (401), a column base stiffening rib (402), and embedded steel bars (403). The embedded steel bars (403) are steel bars that are evenly distributed and welded to the column base embedded steel plate (401).

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