Construction structure for controlling installation perpendicularity of CT clamping groove assembly type underground diaphragm wall

Abstract

The utility model discloses a construction structure for controlling installation perpendicularity of a CT (Computed Tomography) clamping groove assembly type diaphragm wall, which comprises a plurality of prefabricated wall bodies which are assembled together, a left transverse through groove and a right transverse through groove are arranged on the top surface of each prefabricated wall body, a front double-lug hanging bar and a rear double-lug hanging bar are arranged in each transverse through groove, each double-lug hanging bar is provided with two hanging holes which are staggered up and down, and the two hanging holes are respectively provided with a clamping groove. The two double-lug lifting bars are respectively an upper lifting hole and a lower lifting hole, the center lines of the upper lifting hole and the lower lifting hole extend along the longitudinal direction of the transverse through groove, the upper lifting hole is a lifting hole, the lower lifting hole is a penetrating hole, the top of each double-lug lifting bar is flush with the top surface of the prefabricated wall body, and the two lifting holes of each double-lug lifting bar are positioned in the transverse through groove; the part, below the two lifting holes, of the double-lug lifting bar is pre-buried in the prefabricated wall body; the prefabricated wall body adopts two solid steel bars to cross on the guide wall, the solid steel bars penetrate through the lower lifting holes, and adjusting base plates are arranged between the lower lifting holes and the solid steel bars. According to the utility model, the T-shaped clamping head of the rear-width prefabricated wall body can be smoothly and completely inserted into the C-shaped clamping groove of the front-width prefabricated wall body.

Description

Technical Field

[0001] This utility model relates to the construction structure of diaphragm walls, and in particular to a construction structure for controlling the verticality of CT card slot prefabricated diaphragm wall installation. Background Technology

[0002] Currently, prefabricated diaphragm walls combining permanent and temporary structures are gradually replacing conventional SMW (Surface Mount Welded Wall) pile construction. This construction process not only significantly saves construction space and time but also promotes energy conservation, emission reduction, and environmental friendliness. However, the allowable deviation in the thickness direction of the C-slot and T-head of the CT-slot type prefabricated diaphragm wall is only 2cm, and the allowable deviation in the width direction is only 2.2cm. Therefore, the verticality requirement for CT-slot type prefabricated diaphragm walls during lowering is extremely high. Furthermore, during the lowering of prefabricated diaphragm walls, deviations in guide wall elevation and pre-embedded lifting rods often result in the verticality of the prefabricated diaphragm walls failing to meet design requirements after lowering. When the verticality deviation of the first prefabricated section is significant, the T-clamp of the subsequent prefabricated section cannot be fully inserted into the C-clamp of the first prefabricated section. In this case, the subsequent prefabricated section becomes stuck on the first prefabricated section, unable to move up or down. The exposed upper portion needs to be chiseled away, and the lower suspended portion requires a row of reinforcing piles on the outside. After excavation, the cast-in-place sidewalls must be reconstructed. This not only prolongs the construction period and increases construction costs but also poses safety hazards for later operation. Therefore, controlling the verticality of prefabricated wall installation is a key factor in the successful construction of CT-clamp type permanent and temporary combined prefabricated diaphragm walls. Utility Model Content

[0003] This utility model provides a construction structure for controlling the verticality of the CT card slot prefabricated diaphragm wall installation to solve the technical problems existing in the prior art. This construction structure allows the T-card head of the subsequent prefabricated wall to be smoothly and completely inserted into the C-card slot of the preceding prefabricated wall.

[0004] The technical solution adopted by this utility model to solve the technical problems existing in the prior art is: a construction structure for controlling the verticality of the prefabricated diaphragm wall installation of a CT card slot. This construction structure includes multiple prefabricated wall panels assembled together. Each prefabricated wall panel has two sides (left and right), a top surface, and a bottom surface. A C-shaped card slot is provided in the middle of one of the two sides, and a T-shaped card head is provided in the middle of the other side. The C-shaped card slot and the T-shaped card head are arranged continuously along the length of the diaphragm wall. Two horizontal through slots are provided on the top surface, and two double-eared suspension rods are provided in each horizontal through slot. It is formed by welding two single-eared lifting rods in a staggered manner, and has two lifting holes staggered vertically, namely an upper lifting hole and a lower lifting hole. The center lines of the upper and lower lifting holes extend along the longitudinal direction of the transverse through groove. The upper lifting hole is a lifting hole and the lower lifting hole is a through hole. The top of each double-eared lifting rod is flush with the top surface of the precast wall. Both lifting holes of the double-eared lifting rod are located in the transverse through groove. The part below the two lifting holes of the double-eared lifting rod is embedded in the precast wall. The precast wall is supported by two solid steel bars horizontally on the guide wall. The solid steel bars pass through the lower lifting hole, and an adjustment shim is set between the lower lifting hole and the solid steel bar.

[0005] The thickness of a single adjustment pad is any one of 1 mm, 2 mm, and 5 mm.

[0006] The advantages and positive effects of this utility model are as follows: By employing an adjusting shim between the double-eared suspension rod and the solid steel rod, the horizontality of the top surface and the verticality of the sides of the precast wall are adjusted, thereby ensuring the verticality of the precast wall installation. This allows the T-clip of the subsequent precast wall to be smoothly and completely inserted into the C-clip slot of the preceding precast wall. This solves the problem of the verticality of the preceding precast wall not meeting requirements due to uneven guide wall height and errors in the pre-embedding of the double-eared suspension rod. It ensures that the verticality of the precast wall supported by the crossbeam on the solid steel rod meets design requirements, avoiding a series of quality and safety problems caused by the subsequent precast wall's inability to be fully lowered due to insufficient verticality of the preceding precast wall. This improves construction efficiency and reduces construction costs. Furthermore, this utility model is simple to construct, highly practical, and has a high utilization rate. Attached Figure Description

[0007] Figure 1 This is a plan view illustrating the application of this utility model;

[0008] Figure 2 This is a frontal view of the application of this utility model.

[0009] In the diagram: 1. Precast wall, 1-1. C-shaped slot, 1-2. T-shaped clip, 1-3. Horizontal through groove, 1-4. Double-eared suspension rod, 2. Guide wall, 3. Solid steel bar, 4. Adjustment pad. Detailed Implementation

[0010] To further understand the invention content, features, and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings:

[0011] Please see Figure 1 and Figure 2 A construction structure for controlling the verticality of CT card slot prefabricated diaphragm wall installation is disclosed. The structure comprises multiple prefabricated wall panels assembled together. Each prefabricated wall panel 1 has two sides (left and right), a top surface, and a bottom surface. A C-shaped card slot 1-1 is located in the middle of one of the sides, and a T-shaped card head 1-2 is located in the middle of the other side. The C-shaped card slot 1-1 and the T-shaped card head 1-2 are arranged continuously along the length of the diaphragm wall. Two horizontal through slots 1-3 are provided on the top surface. Two double-eared suspension rods 1-4 are provided in each horizontal through slot 1-3, and each double-eared suspension rod 1-4 is formed by welding two single-eared suspension rods in a staggered manner. The precast wall 1 has two staggered lifting holes, an upper lifting hole and a lower lifting hole. The center lines of the upper and lower lifting holes extend longitudinally along the transverse through groove 1-3. The upper lifting hole is a lifting hole and the lower lifting hole is a through hole. The top of each double-eared lifting rod 1-4 is flush with the top surface of the precast wall 1. Both lifting holes of the double-eared lifting rod 1-4 are located in the transverse through groove 1-3. The lower part of the double-eared lifting rod 1-4 is embedded in the precast wall 1. The precast wall 1 is supported by two solid steel rods 3 on the guide wall 2. The solid steel rods 3 pass through the lower lifting hole. An adjusting shim 4 is set between the lower lifting hole and the solid steel rod 3.

[0012] In this embodiment, the thickness of a single adjustment pad 4 is any one of 1mm, 2mm and 5mm.

[0013] Construction method of this utility model:

[0014] 1) Precast diaphragm wall structure;

[0015] 2) Confirm that the trenching of the diaphragm wall is qualified. After the trenching of the diaphragm wall is completed, it needs to be tested. After confirming that the trenching is qualified, the subsequent construction can be carried out.

[0016] 3) The following steps are used to hoist each precast wall panel 1:

[0017] 3.1) Using the upper lifting holes of the double-eared lifting rods 1-4, the precast wall 1 is lowered along the guide wall 2;

[0018] 3.2) When the precast wall 1 is lowered to the bottom of the lower lifting hole of the double-eared lifting rod 1-4 and the top of the guide wall 2, insert the solid steel rod 3 into the lower lifting hole of the double-eared lifting rod 1-4 and place the precast wall 1 horizontally on the guide wall 2. Due to the height difference between the guide wall elevation H and h, the deviation of the pre-embedded lifting rod, etc., the verticality of the precast wall 1 may not meet the design requirements after it is lowered. Therefore, the following steps are required for adjustment.

[0019] 3.3) Use a level to measure the four corners of the top surface of the precast wall 1, and calculate the height difference based on the measured data.

[0020] 3.4) Lift the precast wall 1. Based on the height difference measured in step 3.3), place the adjusting shim 4 between the lower lifting hole of the double-ear lifting rod 1-4 and the solid steel rod 3 to level the top surface of the precast wall.

[0021] 3.5) Repeat steps 3.3) to 3.4) until the height difference at the four corners of the top surface of the precast wall 1 is less than its set threshold. In this embodiment, the allowable deviation of the precast wall C-slot and T-head in the thickness direction is 2cm, the allowable deviation in the width direction is 2.2cm, and the set threshold for the height difference at the four corners of the top surface of the precast wall is 5mm, preferably 1mm.

[0022] 3.6) Use ultrasonic testing to detect the side verticality of the precast wall 1. If the side verticality is greater than its set threshold, repeat steps 3.3) to 3.5) until the side verticality is less than its set threshold. In this embodiment, the side verticality set threshold is 3‰.

[0023] The aforementioned threshold values ​​for side verticality and height difference can be determined through simulation.

[0024] Multiple engineering practices have shown that the above-mentioned construction structure can effectively control the installation verticality of the CT card slot prefabricated diaphragm wall, ensuring that the T-card head of the subsequent prefabricated wall can be smoothly and completely inserted into the C-card slot of the preceding prefabricated wall, without the subsequent prefabricated wall getting stuck on the preceding prefabricated wall.

[0025] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and these all fall within the protection scope of the present invention.

Claims

1. A construction structure for controlling the perpendicularity of installation of a CT slot assembly type diaphragm wall, characterized by, The construction structure comprises a plurality of prefabricated walls assembled together, each of the prefabricated walls is provided with left and right two side faces, a top face and a bottom face, a C-shaped clamping groove is arranged in the middle of one of the two side faces, and a T-shaped clamping head is arranged in the middle of the other side face, the C-shaped clamping groove and the T-shaped clamping head are arranged along the length direction of the diaphragm wall, two horizontal through grooves are arranged on the top face, two double-ear lifting bars are arranged in each of the horizontal through grooves, each of the double-ear lifting bars is formed by up and down staggered welding of two single-ear lifting bars, and two lifting holes are arranged in up and down staggered manner, which are an upper lifting hole and a lower lifting hole, the center lines of the upper lifting hole and the lower lifting hole extend along the longitudinal direction of the horizontal through groove, the upper lifting hole is a lifting hole, and the lower lifting hole is a through hole, the top of each of the double-ear lifting bars is flush with the top face of the prefabricated wall, the two lifting holes of the double-ear lifting bar are located in the horizontal through groove, and the lower part of the two lifting holes of the double-ear lifting bar is embedded in the prefabricated wall; The prefabricated wall is provided with two solid steel bars as cross arms on the guide wall, the solid steel bars pass through the lower lifting holes, An adjusting pad is arranged between the lower lifting hole and the solid steel bar.

2. The construction structure for controlling the verticality of installation of a CT slot assembly type diaphragm wall according to claim 1, wherein The thickness of a single adjusting pad is any one of 1 mm, 2 mm and 5 mm.

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