A prefabricated diaphragm wall joint width control device

Abstract

This utility model relates to a prefabricated diaphragm wall joint width control device, comprising two guide rods, each guide rod including a fixed segment and a movable segment. The fixed segment has two through-holes along its longitudinal direction. The rear end of the movable segment slides through the fixed segment. Two limiting posts are provided on the side wall of the movable segment, protruding beyond the two through-holes on the fixed segment. A limiting block is fixedly installed on one side of the front end of the movable segment, and a through hole is pre-set along its transverse direction near the front end. The fixed segments of the two guide rods are fixed to the two side walls near the top of a prefabricated diaphragm wall in place by two tie rods. The distance from the rear end of the through-holes on the two fixed segments to the front end face of the diaphragm wall is equal to the designed width of the diaphragm wall joint. The limiting blocks at the front ends of the two movable segments are opposite each other, and the distance between them is equal to the thickness of the diaphragm wall. This utility model can accurately control the width of the diaphragm wall joint and ensure that the wall surfaces are aligned between wall sections.

Description

Technical Field

[0001] This utility model belongs to the field of diaphragm wall construction technology and relates to a prefabricated diaphragm wall joint width control device. Background Technology

[0002] Prefabricated diaphragm walls are constructed by prefabricating multiple reinforced concrete wall panels in a prefabrication yard, transporting them to the site, and lowering them one by one into the wall groove. The wall panels are then connected using wet joints. During the lowering and installation of the diaphragm wall, a joint of a certain width needs to be reserved between adjacent wall panels for pouring wet joint concrete. Currently, during construction, the posture of the diaphragm wall is difficult to control during lifting and lowering, easily resulting in swaying back and forth and side to side. This leads to situations where the joint width is too large or too small, and the wall panels cannot be aligned after lowering, seriously affecting the structural safety and durability of the diaphragm wall. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a prefabricated diaphragm wall joint width control device to ensure the construction quality of the diaphragm wall.

[0004] The technical solution of this utility model is as follows:

[0005] A prefabricated diaphragm wall joint width control device is characterized by: including two guide rods, each guide rod including a fixed segment and a movable segment, the fixed segment and the movable segment are made of steel pipe, the front end side wall of the fixed segment is provided with two through-holes along the longitudinal direction, the rear end of the movable segment slides through the fixed segment, two limiting posts are fixedly provided on the side wall of the part of the movable segment that passes through the fixed segment, the two limiting posts protrude out of the two through-holes on the fixed segment respectively, a limiting block is fixedly provided on one side of the front end of the movable segment, and a through hole is preset in the transverse direction near the front end of the movable segment;

[0006] The fixed segments of the two guide rods are anchored to the two side walls near the top of a precast diaphragm wall that has been installed in place by two tie rods. A pad of a certain thickness is provided between the fixed segments and the side walls of the diaphragm wall. The distance from the rear end of the strip-shaped sliding hole on the two fixed segments to the front end face of the diaphragm wall is equal to the design width of the diaphragm wall joint. The limiting blocks at the front ends of the two movable segments are opposite each other, and the distance between the two limiting blocks is equal to the thickness of the diaphragm wall.

[0007] This utility model adopts a longitudinal and transverse limiting structure, which can accurately control the joint width during the installation of prefabricated diaphragm walls and ensure that the wall surfaces of each section are aligned, thus helping to improve the construction quality of diaphragm walls. Attached Figure Description

[0008] Figure 1 This is a side view structural diagram of the present invention;

[0009] Figure 2This is a schematic diagram of the planar structure of this utility model;

[0010] Figure 3 This is a schematic diagram showing the state of the second diaphragm wall when it is lifted above the lowering position;

[0011] Figure 4 This is a side view showing the connection between the second diaphragm wall and the device of this utility model;

[0012] Figure 5 This is a plan view showing the connection between the second diaphragm wall and the device of this utility model;

[0013] Figure 6 This is a side view of the second diaphragm wall after it has been lowered into place;

[0014] Figure 7 This is the second floor plan after the diaphragm wall has been lowered into place. Detailed Implementation

[0015] like Figure 1 , Figure 2 As shown, this utility model includes two guide rods, each guide rod including a fixed segment 1 and a movable segment 2. Both the fixed segment and the movable segment are made of steel pipe. The front side wall of the fixed segment is provided with two through-holes 3 along the longitudinal direction. The rear end of the movable segment 2 is slidably inserted into the fixed segment 1. Two limiting posts 4 are fixedly provided on the side wall of the part of the movable segment inserted into the fixed segment. The two limiting posts 4 protrude out of the two through-holes 3 on the fixed segment. A limiting block 5 is fixedly provided on one side of the front end of the movable segment 2. A through hole 6 is preset in the transverse direction near the front end of the movable segment 2.

[0016] The fixed segments 1 of the two guide rods are anchored to the two side walls near the top of a precast diaphragm wall 8 that has been installed in place by two tie rods 7. A pad 9 of a certain thickness is provided between the fixed segments 1 and the side walls of the diaphragm wall 8. The distance from the rear end of the strip-shaped sliding hole 3 on the two fixed segments to the front end face of the diaphragm wall 8 is equal to the design width of the diaphragm wall joint. The limiting blocks 5 at the front ends of the two movable segments are opposite each other, and the distance between the two limiting blocks 5 is equal to the thickness of the diaphragm wall 8.

[0017] The method for lowering and installing precast diaphragm walls according to this utility model is as follows:

[0018] like Figure 3 As shown, after the first diaphragm wall panel 8 is lowered into place, two guide rods are anchored to the upper sides of the first diaphragm wall panel through two tie rods. The two tie rods can be installed using the hoisting holes on the diaphragm wall panel. The second diaphragm wall panel 8 is hoisted to a position above the lowered position. The second diaphragm wall panel 8 has a reserved hole 10 that runs horizontally through the diaphragm wall near its lower end. The distance from the reserved hole to the rear end face of the diaphragm wall panel is equal to the distance from the through hole on the movable segment of the guide rod to the limiting post.

[0019] like Figure 4 , Figure 5 As shown, the height of the second diaphragm wall 8 is lowered, and the lower end of the second diaphragm wall is inserted between the movable segments 2 of the two guide rods, so that the reserved hole on the second diaphragm wall is aligned with the through hole on the movable segment of the guide rod, and the pull rod 7 is inserted to pull the movable segments 2 of the two guide rods against each other; at this time, the rear end face of the second diaphragm wall 8 is flush with the outer wall of the limiting post 4 on the movable segment of the guide rod.

[0020] The crane moves the second diaphragm wall 8 towards the first diaphragm wall. The movable segment 2 of the guide rod slides along the sliding hole on the fixed segment until the limiting post 4 on the movable rod contacts the rear end of the strip-shaped sliding hole 3 on the fixed segment. The limiting post restricts the movable segment from sliding backward. At this time, the distance between the rear end face of the second diaphragm wall and the front end face of the first diaphragm wall reaches the design width of the diaphragm wall joint. Moreover, due to the restriction of the two limiting blocks at the rear ends of the two movable segments, the walls of the second diaphragm wall and the first diaphragm wall are flush.

[0021] like Figure 6 , Figure 7 As shown, the tie rod connection between the two guide rod movable sections is removed, and the crane lowers the second diaphragm wall into place. After being lowered into place, the two diaphragm walls are flush, and the spacing meets the design requirements.

[0022] Remove the two guide rods from the first diaphragm wall and install them on the second diaphragm wall, repeating the above method in a cyclical manner.

Claims

1. A segmental diaphragm wall joint width control device, characterized by: It includes two guide rods, each guide rod comprising a fixed segment and a movable segment. The fixed segment and the movable segment are made of steel pipe. The front side wall of the fixed segment has two through-holes along the longitudinal direction. The rear end of the movable segment slides through the fixed segment. The side wall of the portion of the movable segment that passes through the fixed segment is fixedly provided with two limiting posts. The two limiting posts protrude from the two through-holes on the fixed segment. A limiting block is fixedly provided on one side of the front end of the movable segment. A through hole is pre-set in the transverse direction near the front end of the movable segment. The fixed segments of the two guide rods are anchored to the two side walls near the top of a precast diaphragm wall that has been installed in place by two tie rods. A pad of a certain thickness is provided between the fixed segments and the side walls of the diaphragm wall. The distance from the rear end of the strip-shaped sliding hole on the two fixed segments to the front end face of the diaphragm wall is equal to the design width of the diaphragm wall joint. The limiting blocks at the front ends of the two movable segments are opposite each other, and the distance between the two limiting blocks is equal to the thickness of the diaphragm wall.

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