Separation wall temporary force transmission structure for group pit construction

Abstract

The utility model discloses a partition wall temporary force transmission structure for group pit construction. The partition wall temporary force transmission structure comprises a force transmission block, a first joint bar, a second joint bar, a first extension bar and a second extension bar. The force transmission block is constructed between a top ring beam of the partition wall and a top plate of a foundation pit basement which is constructed firstly, one ends of the first joint bar and the second joint bar are arranged in the top ring beam of the partition wall, and the other ends of the first joint bar and the second joint bar extend into the force transmission block; one end of the first extension rib is lapped with the other end of the first joint bar to form a first lapping part, and one end of the second extension rib is lapped with the other end of the second joint bar to form a second lapping part; the main reinforcements in the basement top plate of the foundation pit firstly constructed extend into the force transmission blocks and are connected with the first extension reinforcements and the second extension reinforcements; the force transmission blocks are arranged at intervals to form a temporary force transmission structure. The utility model relates to the technical field of building construction and can solve the problem that in the prior art, force cannot be effectively transmitted when the elevation of a foundation pit basement top plate is higher than that of a partition wall top ring beam.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a temporary force transmission structure of a partition wall used for group pit construction. Background Art

[0002] During the construction of a cluster of deep foundation pits, each pit is separated by a partition wall, allowing for sequential construction. A force transfer mechanism is required between the first completed basement structure and the partition wall to ensure smooth transfer of earth pressure. The conventional approach for this is to install horizontal steel cross bracing or concrete slab cross bracing between the basement roof and the top ring beam of the partition wall.

[0003] However, when the elevation of the basement roof of the pre-constructed foundation pit is higher than the top ring beam of the partition wall, the steel replacement brace or concrete slab with replacement brace cannot be horizontally connected to the top ring beam of the partition wall, thus preventing effective force transmission. Therefore, it is necessary to provide a temporary force transmission structure for the partition wall of the group pit construction, which can solve the problem of ineffective force transmission in the existing technology when the elevation of the basement roof of the pre-constructed foundation pit is higher than the top ring beam of the partition wall. Summary of the Invention

[0004] The purpose of the utility model is to provide a temporary force transmission structure of a partition wall for group pit construction, which can solve the problem in the prior art that force cannot be effectively transmitted when the elevation of the basement top plate of the foundation pit is higher than the top ring beam of the partition wall.

[0005] The utility model is achieved in this way:

[0006] A temporary force transmission structure of a partition wall for group pit construction comprises a force transmission block, a first dowel, a second dowel, a first extension bar and a second extension bar; the force transmission block is constructed between the top of the partition wall top ring beam and the top slab of a foundation pit basement constructed first, one end of the first dowel and the second dowel are respectively arranged in the partition wall top ring beam, and the other ends of the first dowel and the second dowel are respectively extended into the force transmission block; one end of the first extension bar is overlapped with the other end of the first dowel to form a first overlap portion, and one end of the second extension bar is overlapped with the other end of the second dowel to form a second overlap portion; the main reinforcement in the top slab of the foundation pit basement constructed first extends into the force transmission block and is connected with the other end of the first extension bar and the other end of the second extension bar; a plurality of force transmission blocks are arranged at intervals along the length direction of the partition wall, so that a temporary force transmission structure is formed between the top slab of the foundation pit basement constructed first and the top ring beam of the partition wall through the plurality of force transmission blocks.

[0007] The first overlapping portion and the second overlapping portion are staggered in the height direction.

[0008] The height of the first overlapping portion is higher than that of the second overlapping portion. The first overlapping portion is located on the first construction side of the force transmission block, and the second overlapping portion is located on the last construction side of the force transmission block.

[0009] The first construction side of the force transmission block is flush with the first construction side of the partition wall top ring beam, the width of the force transmission block is smaller than the width of the partition wall top ring beam, and the top surface of the force transmission block is flush with the top surface of the first construction foundation pit basement top plate.

[0010] The overlapping length of the first overlapping portion is times the diameter of the first extending rib, and the overlapping length of the second overlapping portion is times the diameter of the second extending rib.

[0011] The basement top plate of the foundation pit and the force transfer block are cast into shape in one piece.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The utility model is provided with a force transmission block. Under the working condition that the elevation of the basement top plate of the foundation pit to be constructed first is higher than the elevation of the top ring beam of the partition wall, the basement top plate of the foundation pit to be constructed first and the force transmission block are cast synchronously. The basement top plate of the foundation pit to be constructed first and the top ring beam of the partition wall are connected into a whole through the force transmission block, thereby ensuring the effective force transmission between the basement top plate of the foundation pit to be constructed first and the top ring beam of the partition wall, thereby meeting the safety of the foundation pits to be constructed successively in the construction of a group of pits, and solving the problem in the prior art that steel replacement supports or concrete slab replacement supports cannot be horizontally connected with the top ring beam of the partition wall.

[0014] 2. The utility model is provided with the first dowel, the second dowel, the first extension bar and the second extension bar. Through the overlap of the first extension bar between the first dowel and the main bar of the top slab of the foundation pit basement constructed earlier, and the overlap of the second extension bar between the second dowel and the main bar of the top slab of the foundation pit basement constructed earlier, the force transmission block forms a reinforced concrete structure with high structural strength and stable and safe force transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a vertical construction drawing of a temporary force transmission structure of a partition wall used in group pit construction according to the utility model;

[0016] Figure 2 The utility model is a plan construction drawing of a temporary force transmission structure of a partition wall used for group pit construction.

[0017] In the figure, 1 is the force transfer block, 2 is the first dowel, 3 is the second dowel, 4 is the first extension bar, 5 is the second extension bar, 6 is the top ring beam of the partition wall, 7 is the top slab of the foundation pit basement to be constructed first, 8 is the first overlap, 9 is the second overlap, 10 is the main bar, and 11 is the partition wall. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Please see the attached Figure 1 and attached Figure 2, a temporary force transmission structure of a partition wall for group pit construction, comprising a force transmission block 1, a first dowel bar 2, a second dowel bar 3, a first extension bar 4 and a second extension bar 5; the force transmission block 1 is constructed between the top of the partition wall top ring beam 6 and the first construction basement top slab 7, one end of the first dowel bar 2 and the second dowel bar 3 are respectively arranged in the partition wall top ring beam 6, and the other ends of the first dowel bar 2 and the second dowel bar 3 extend into the force transmission block 1 respectively; one end of the first extension bar 4 is overlapped with the other end of the first dowel bar 2 to form a first overlap portion 8, and one end of the second extension bar 5 is overlapped with the other end of the second dowel bar 3 to form a second overlap portion 9; the main reinforcement 10 in the first construction basement top slab 7 extends into the force transmission block 1 and is connected to the other end of the first extension bar 4 and the other end of the second extension bar 5; a plurality of force transmission blocks 1 are arranged at intervals along the length direction of the partition wall 11, so that the first construction basement top slab 7 forms a temporary force transmission structure through the plurality of force transmission blocks 1 and the partition wall top ring beam 6.

[0020] Under the working condition that the elevation of the first construction pit basement top slab 7 is higher than the elevation of the partition wall top ring beam 6, the first dowel bar 2 and the second dowel bar 3 are reserved synchronously when the partition wall top ring beam 6 is constructed, and the main reinforcement 10 of the first construction pit basement top slab 7 is reserved and extended outward when the reinforcement of the first construction pit basement top slab 7 is constructed. In the construction area of the force transmission block 1, the first extension bar 4 and the second extension bar 5 are connected between the first dowel bar 2 and the second dowel bar 3 and the main reinforcement 10, and the first construction pit basement top slab 7 and the force transmission block 1 are cast synchronously, so that the first construction pit basement top slab 7, the force transmission block 1 and the partition wall top ring beam 6 are connected into a whole, realizing the force transmission between the first construction pit basement top slab 7 and the partition wall top ring beam 6, which is conducive to ensuring the safety of the foundation pit to be constructed later.

[0021] The height of the force transfer block 1 is determined by the elevation difference between the pre-construction pit basement roof 7 and the partition wall top ring beam 6 to ensure its temporary force transmission effectiveness. Several force transfer blocks 1 are arranged along the partition wall 11. The number, width, and clearance between these blocks can be adjusted based on actual force transmission requirements to ensure effective overall force transmission between the pre-construction pit basement roof 7 and the partition wall top ring beam 6.

[0022] The first dowel bars 2 and the second dowel bars 3 are arranged in pairs, and the number of the first dowel bars 2 and the second dowel bars 3 along the width direction (i.e., the wall length direction of the partition wall 11) in the force transmission block 1 can be adaptively adjusted according to actual force transmission requirements.

[0023] Please see the attached Figure 1 The first overlapping portion 8 and the second overlapping portion 9 are staggered in the height direction, which can better ensure the safety of the foundation pits constructed successively and improve the safety and reliability of force transmission.

[0024] Please see the attached Figure 1The height of the first overlapping portion 8 is higher than the height of the second overlapping portion 9. The first overlapping portion 8 is located on the first construction side of the force transmission block 1 (i.e., the side close to the foundation pit constructed first), and the second overlapping portion 9 is located on the later construction side of the force transmission block 1 (i.e., the side close to the foundation pit constructed later).

[0025] Since the basement top plate 7 of the foundation pit constructed first is higher than the top ring beam 6 of the partition wall, according to the stress characteristics of the foundation pits constructed first and second, the safety of the foundation pits constructed later is further guaranteed under a reliable force transmission state by staggering the first overlapping part 8 and the second overlapping part 9 in a front-to-back and up-down manner.

[0026] Please see the attached Figure 1 The first construction side of the force transmission block 1 is flush with the first construction side of the partition wall top ring beam 6, the width of the force transmission block 1 is smaller than the width of the partition wall top ring beam 6, and the top surface of the force transmission block 1 is flush with the top surface of the first construction foundation pit basement top plate 7, ensuring that the force transmission block 1 plays a reliable connection and stable force transmission effect between the first construction foundation pit basement top plate 7 and the partition wall top ring beam 6.

[0027] Please see the attached Figure 1 The overlapping length of the first overlapping portion 8 is 10 times the diameter of the first extending rib 4, and the overlapping length of the second overlapping portion 9 is 10 times the diameter of the second extending rib 5, ensuring reliable and safe force transmission.

[0028] The foundation pit basement top plate 7 and the force transfer block 1 are cast into shape as a whole in the construction process.

[0029] When the formwork of the foundation pit basement top plate 7 is supported, the formwork of the force transfer block 1 is supported at the same time, and the concrete is poured synchronously to ensure the integrity and structural strength of the foundation pit basement top plate 7 and the force transfer block 1, thereby ensuring the force transmission effect.

[0030] Please see the attached Figure 1 and attached Figure 2 , the construction method of the utility model is:

[0031] During the construction of the top ring beam 6 of the partition wall, the first dowel bar 2 and the second dowel bar 3 are pre-embedded in the top ring beam 6 of the partition wall. The first dowel bar 2 extends upward to the front construction side of the construction area of the force transmission block 1, and the second dowel bar 3 extends upward to the rear construction side of the construction area of the force transmission block 1. The first dowel bar 2 is higher than the second dowel bar 3.

[0032] Preferably, the first dowel bar 2 and the second dowel bar 3 may be made of 10φ25mm steel bars.

[0033] During the reinforcement tying construction of the first-construction foundation pit basement top slab 7, the main reinforcement 10 (surface reinforcement and / or bottom reinforcement) of the first-construction foundation pit basement top slab 7 is extended to the outside of the rear construction side of the first-construction foundation pit basement top slab 7, that is, inside the top of the construction area of the force transmission block 1.

[0034] In the construction area of the force transmission block 1, the first extending reinforcement 4 is connected to the first inserted reinforcement 2 with a lap length of 10 times the diameter of the reinforcement, i.e. 10d, to form a first lap joint 8, and the first extending reinforcement 4 is vertically overlapped with the main reinforcement 10; the second extending reinforcement 5 is connected to the second inserted reinforcement 3 with a lap length of 10 times the diameter of the reinforcement, i.e. 10d, to form a second lap joint 9, and the second extending reinforcement 5 is vertically overlapped with the main reinforcement 10.

[0035] Preferably, the first extension bar 4 and the second extension bar 5 can be made of 10φ25mm steel bars.

[0036] The force transfer block 1 is constructed of cast-in-place reinforced concrete. The first and second dowel bars 2 and 3, located within the force transfer block 1, and the first and second extension bars 4 and 5 serve as the reinforcement structure within the force transfer block 1. The construction area for the force transfer block 1 is 0.5m thick and 2m wide. The height is determined by the distance between the top surface of the partition wall's top ring beam 6 and the top surface of the pre-constructed foundation pit basement roof 7. The clear distance between the force transfer block 1 and the partition wall's top ring beam 6 is 2m.

[0037] The spacing between the first dowel bar 2 and the second dowel bar 3 along the wall direction of the partition wall 11 is 150 mm, and the first extension bar 4 and the second extension bar 5 are arranged accordingly to connect them with the main bar 10 of the pre-constructed foundation pit basement top plate 7 at the corresponding position.

[0038] During the pouring, the top slab 7 of the basement of the foundation pit is constructed first, and several force transfer blocks 1 are poured simultaneously. Each force transfer block 1 is connected to the top ring beam 6 of the partition wall through the first dowel 2, the second dowel 3, the first extension bar 4 and the second extension bar 5 to form a whole. The top slab of the basement of the foundation pit 7 and the several force transfer blocks 1 are poured into a whole, thereby forming a temporary force transfer structure between the top slab of the basement of the several force transfer blocks 1 and the top ring beam of the partition wall, which is convenient for the safe construction of the foundation pit to be constructed later.

[0039] The concrete strength grade of the force transmission block 1 is C30, and the concrete strength grade of the foundation pit basement top slab 7 to be constructed first can be determined according to the engineering design requirements.

[0040] When constructing the basement top plate of the foundation pit to be constructed later, the force transmission block 1 is chiseled out, and then the basement top plate of the foundation pit to be constructed later is connected with the basement top plate 7 of the foundation pit to be constructed earlier.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A temporary force transmission structure for a partition wall used in group pit construction, characterized by: The invention comprises a force transmission block (1), a first inserted bar (2), a second inserted bar (3), a first extension bar (4) and a second extension bar (5); the force transmission block (1) is constructed between the top of the partition wall top ring beam (6) and the top plate (7) of the foundation pit basement constructed first; one end of the first inserted bar (2) and the second inserted bar (3) are respectively arranged in the partition wall top ring beam (6); the other ends of the first inserted bar (2) and the second inserted bar (3) are respectively extended into the force transmission block (1); one end of the first extension bar (4) is overlapped with the other end of the first inserted bar (2) to form a first The overlap portion (8) is formed by overlapping one end of the second extension bar (5) and the other end of the second inserted bar (3); the main bar (10) in the top plate (7) of the foundation pit basement is first constructed and extends into the force transmission block (1) and is connected to the other end of the first extension bar (4) and the other end of the second extension bar (5); a plurality of force transmission blocks (1) are arranged at intervals along the length direction of the partition wall (11), so that the top plate (7) of the foundation pit basement is first constructed and a temporary force transmission structure is formed between the plurality of force transmission blocks (1) and the top ring beam (6) of the partition wall.

2. The temporary force transmission structure for partition walls used in group pit construction according to claim 1 is characterized by: The first overlapping portion (8) and the second overlapping portion (9) are staggered in the height direction.

3. The temporary force transmission structure of the partition wall for group pit construction according to claim 2 is characterized by: The height of the first overlapping portion (8) is higher than that of the second overlapping portion (9); the first overlapping portion (8) is located on the first construction side of the force transmission block (1); and the second overlapping portion (9) is located on the last construction side of the force transmission block (1).

4. The temporary force transmission structure for partition walls used in group pit construction according to claim 3 is characterized by: The first construction side of the force transmission block (1) is flush with the first construction side of the partition wall top ring beam (6), the width of the force transmission block (1) is smaller than the width of the partition wall top ring beam (6), and the top surface of the force transmission block (1) is flush with the top surface of the first construction foundation pit basement top plate (7).

5. The temporary force transmission structure for partition walls used in group pit construction according to any one of claims 1 to 3, characterized in that: The overlapping length of the first overlapping portion (8) is 10 times the diameter of the first extending rib (4), and the overlapping length of the second overlapping portion (9) is 10 times the diameter of the second extending rib (5).

6. The temporary force transmission structure for partition walls used in group pit construction according to claim 1 is characterized by: The foundation pit basement top plate (7) and the force transmission block (1) are cast into shape as a whole.

Images