Anchorage device fixing device for prestressed underground diaphragm wall

Abstract

The utility model relates to an anchorage device fixing device for a prestressed underground diaphragm wall, which comprises an anchor backing plate and steel bar connecting pieces, the anchor backing plate is provided with holes corresponding to anchorage devices and sleeved on the anchorage devices, four corners of the anchor backing plate are respectively provided with a protruding end, and the protruding ends of the four corners of the anchor backing plate are respectively connected with one steel bar connecting piece through rod pieces. The rod piece and the protruding end are fixed through a nut, and the steel bar connecting piece is sleeved on a main bar of an underground diaphragm wall steel bar cage. The anchorage device has the beneficial effects that the anchorage device is fixedly connected with the surrounding diaphragm wall reinforcement cage through the anchor backing plate, so that the anchorage device can be fixed in the reinforcement cage, and the anchorage device is prevented from deviating in the hoisting and lowering process of the reinforcement cage to influence the stress effect; the steel bar connecting piece is connected with the protruding end of the anchor bearing plate through a rod piece with threads, the rod piece is fixed through a nut, and the position of the anchor bearing plate can be properly adjusted by adjusting the tightness of the nut.

Description

Technical Field

[0001] The utility model relates to the technical field of anchoring devices, and particularly includes an anchor fixing device for a prestressed diaphragm wall. Background Art

[0002] With the rapid progress of technology and the high-speed development of social economy, projects such as large foundation pits and deep-water sheet pile wharves have put forward higher requirements for the strength, stiffness and durability of diaphragm walls. In order to meet the requirements of diaphragm wall bearing capacity, deformation and crack control, the cross-sectional dimensions, depth and steel quantity of diaphragm walls are constantly increasing. The problem is that once the thickness, depth and steel consumption of the diaphragm wall increase, its seismic performance will be weakened, and at the same time, the construction difficulty and risk of diaphragm wall grooving, steel cage hoisting and concrete pouring will also increase, and the cost of the diaphragm wall will also increase accordingly. The prestressed diaphragm wall came into being.

[0003] Patents such as CN116145684A, CN212983836U, CN110453674A, CN108385665A, CN103835311A, etc. all provide a cast-in-place post-tensioned prestressed diaphragm wall. Different from the construction of prestressed structures in bridges and buildings, after the prestressed steel bars of the diaphragm wall are laid, they need to be hoisted to the predetermined position. Local deformation or displacement may occur during the lowering process of the prestressed steel bars and fixed anchors, affecting the stress effect. And in the prior art, there are few devices for fixing prestressing cables and anchors. For example, patent CN103835311A fixes the prestressing cable by binding, and patent CN212983836U fixes the prestressing cable by a clamp. Both only fix the prestressing cable and do not fix the anchor, and it is difficult to solve the problem that the fixed anchor has local deformation or displacement, affecting the stress effect. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an anchor fixing device for a prestressed diaphragm wall.

[0005] This kind of anchor fixing device for a prestressed diaphragm wall includes: an anchor backing plate and a steel bar connecting piece. The anchor backing plate is provided with holes corresponding to the anchor and sleeved on the anchor. Each of the four corners of the anchor backing plate is provided with a protruding end. Each of the protruding ends at the four corners of the anchor backing plate is connected with a steel bar connecting piece through a rod. The rod and the protruding end are fixed by a nut. The steel bar connecting piece is sleeved on the main steel bars of the diaphragm wall steel cage.

[0006] Preferably, a connecting hole is horizontally opened on the protruding end. One end of the connecting rod for fixing the steel bar connecting piece is fixed on the side of the steel bar connecting piece facing the anchor backing plate. The rod is provided with threads, and the other end of the rod is inserted into the connecting hole and fixed by a nut.

[0007] Preferably, the protruding end protrudes along the length direction of the anchor backing plate, there is a gap between the two protruding ends at the same end of the anchor backing plate, the connecting nuts are connected to the rods connected by the two protruding ends within the gap, and a space for the main reinforcement bars of the diaphragm wall reinforcement cage to pass through is left between the ends of the two rods.

[0008] Preferably, the steel bar connector is provided with holes matching the main reinforcement bars of the diaphragm wall reinforcement cage. The steel bar connector includes a left connector and a right connector. Semi-circular grooves are provided on the opposite surfaces of the left connector and the right connector, and the left connector and the right connector are respectively clamped on both sides of the main reinforcement bars of the diaphragm wall reinforcement cage.

[0009] Preferably, in the two connecting seams of the left connector and the right connector, one connecting seam is rotationally connected by a hinge, and the other connecting seam is fixedly connected by a connector.

[0010] The beneficial effects of the present utility model are as follows:

[0011] 1) The present utility model provides an anchor fixing device for a prestressed diaphragm wall. By fixing and connecting the anchor and the surrounding diaphragm wall reinforcement cage through the anchor backing plate, the anchor can be fixed in the reinforcement cage, preventing the position deviation of the anchor during the hoisting and lowering process of the reinforcement cage, which affects the stress effect.

[0012] 2) The steel bar connector of the present utility model is connected to the protruding end of the anchor backing plate through a threaded rod, and the rod is fixed by a nut. By adjusting the tightness of the nut, the position of the anchor backing plate can be appropriately adjusted. After the hoisting and lowering of the reinforcement cage is completed and confirmed to be correct, the nut is tightened thoroughly. It is flexible to use and ensures the accurate installation position of the anchor.

[0013] 3) The anchor backing plate of the present utility model is provided with protruding ends for connecting with the steel bar connector. A space for the rod and the main reinforcement bars of the diaphragm wall reinforcement cage to pass through is left between the protruding ends, which is not likely to conflict with the existing diaphragm wall reinforcement cage structure and is convenient for construction. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the anchor fixing device.

[0015] Description of the reference numerals: diaphragm wall reinforcement cage 1, anchor 2, anchor backing plate 3, steel bar connector 4, left connector 4-1, right connector 4-2, nut 5, connection hole 6, rod 7, hinge 8, connector 9. Detailed Embodiments

[0016] The following further describes the present utility model in conjunction with embodiments. The description of the following embodiments is only used to help understand the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

[0017] As an embodiment, as Figure 1 shown, this fixing device for the anchor of the prestressed diaphragm wall includes: an anchor backing plate 3 and a steel bar connecting member 4. The anchor backing plate 3 is provided with holes corresponding to the anchors 2 and sleeved on the anchors 2. The length direction of the anchor backing plate 3 is perpendicular to the transverse main steel bars of the diaphragm wall reinforcement cage 1, and its length corresponds to the distance between the transverse main steel bars of the diaphragm wall reinforcement cage 1 on both sides of the anchor 2.

[0018] The diaphragm wall reinforcement cage 1 is a reinforcement cage designed to meet the strength requirements of the deep foundation pit retaining structure of the diaphragm wall. The anchor 2 is used to fix the tension of the prestressed steel bundle, ensure its effective prestress effect, and improve the bearing capacity and stability of the structure.

[0019] Each of the four corners of the anchor backing plate 3 is provided with a protruding end, and the protruding ends extend to the positions of the main steel bars of the diaphragm wall reinforcement cage 1 on one side of the anchor 2. Each of the protruding ends at the four corners of the anchor backing plate 3 is connected with a steel bar connecting member 4 through a rod member 7. The rod member 7 and the protruding end are fixed by a nut 5. The steel bar connecting member 4 is sleeved on the main steel bar of the diaphragm wall reinforcement cage 1, and the position of the anchor backing plate 3 can be appropriately adjusted by rotating the nut 5.

[0020] In this embodiment, the protruding end protrudes along the length direction of the anchor backing plate 3, and a connecting hole 6 is horizontally opened on the protruding end. One end of the rod member 7 is fixedly connected to the side of the steel bar connecting member 4 facing the anchor backing plate 3. The rod member 7 is provided with threads, and the other end of the rod member 7 is inserted into the connecting hole 6 and fixed by a nut 5.

[0021] There is a gap between the two protruding ends at the same end of the anchor backing plate 3. After the rod members 7 connected to the two protruding ends extend into the gap and connect the nut 5, there is a certain space between the ends of the two rod members 7, which can allow the main steel bars of the diaphragm wall reinforcement cage 1 to pass through.

[0022] The steel bar connecting member 4 includes a left connecting member 4-1 and a right connecting member 4-2. In this embodiment, the main steel bars of the diaphragm wall reinforcement cage 1 connected by the steel bar connecting member 4 are vertical main steel bars. Semi-circular grooves are provided on the opposite surfaces of the left connecting member 4-1 and the right connecting member 4-2. The other side of the right connecting member 4-2 is fixedly connected to the rod member 7. The left connecting member 4-1 and the right connecting member 4-2 are respectively clamped on both sides of the main steel bar of the diaphragm wall reinforcement cage 1. One of the two connecting seams between the left connecting member 4-1 and the right connecting member 4-2 is rotatably connected through a hinge 8, and the other connecting seam is fixedly connected through a connecting member 9. After the left connecting member 4-1 and the right connecting member 4-2 are spliced and fixed, the two semi-circular grooves are spliced to form a hole matching the main steel bar of the diaphragm wall reinforcement cage 1, and the main steel bar of the diaphragm wall reinforcement cage 1 passes through the hole to realize the fixation of the steel bar connecting member 4 and the main steel bar of the diaphragm wall reinforcement cage 1.

[0023] This anchorage fixing device for prestressed diaphragm walls, when in use, after the binding of the reinforcement cage 1 of the diaphragm wall is completed, an anchor backing plate 3 is manufactured according to the designed position of the anchorage 2 and holes are drilled in it. The anchor backing plate 3 is sleeved on the anchorage 2 and fixed. The protruding ends at the four corners of the anchor backing plate 3 are inserted into the rod member 7. The steel bar connector 4 is extended to the main reinforcement of the nearest reinforcement cage 1 of the diaphragm wall and then closed through the hinge 8 and fixed with the connector 9. Then, the nut 5 is appropriately tightened to fix the relative positions of the anchorage 2 and the reinforcement cage 1 of the diaphragm wall. Then, the synchronous hoisting and lowering of the reinforcement cage 1 of the diaphragm wall, the anchorage 2 and the anchor backing plate 3 are carried out. When the reinforcement cage 1 of the diaphragm wall is lowered to the designed position, the nut 5 is appropriately loosened as needed. After repeatedly confirming and adjusting the positions of the anchor backing plate 3 and the anchorage 2, the nut 5 is tightened again to completely fix the connection between the anchorage 2 and the reinforcement cage 1 of the diaphragm wall.

Claims

1. An anchor fixing device for a prestressed diaphragm wall, characterized in that, Comprising: An anchor backing plate and a steel bar connector. The anchor backing plate is provided with openings corresponding to the anchor fittings and sleeved on the anchor fittings. Each of the four corners of the anchor backing plate is provided with a protruding end. Each of the protruding ends at the four corners of the anchor backing plate is connected with a steel bar connector through a rod. The rod and the protruding end are fixed by a nut. The steel bar connector is sleeved on the main reinforcement bars of the diaphragm wall reinforcement cage.

2. The anchorage fixing device for a prestressed diaphragm wall according to claim 1, characterized in that, A connecting hole is horizontally formed on the protruding end. One end of the rod connecting the steel bar connector is fixed on the side facing the anchor backing plate. The rod is provided with threads, and the other end of the rod is inserted into the connecting hole and fixed by a nut.

3. The anchor fixing device for a prestressed diaphragm wall according to claim 2, characterized in that, The protruding end protrudes along the length direction of the anchor backing plate. There is a gap between the two protruding ends at the same end of the anchor backing plate. The nuts are connected to the rods connected to the two protruding ends within the gap, and a space for the main reinforcement bars of the diaphragm wall reinforcement cage to pass through is left between the ends of the two rods.

4. The anchor fixing device for a prestressed diaphragm wall according to claim 1, characterized in that, The steel bar connector is provided with holes matching the main reinforcement bars of the diaphragm wall reinforcement cage. The steel bar connector includes a left connector and a right connector. Semi-circular grooves are provided on the opposite surfaces of the left connector and the right connector. The left connector and the right connector are respectively clamped on both sides of the main reinforcement bars of the diaphragm wall reinforcement cage.

5. The anchorage fixing device for a prestressed diaphragm wall according to claim 4, characterized in that, In the two connecting seams of the left connector and the right connector, one connecting seam is rotationally connected through a hinge, and the other connecting seam is fixedly connected through a connector.

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