Joint counter-force box for underground diaphragm wall

Abstract

The utility model relates to the technical field of underground diaphragm wall construction, in particular to a connector counter-force box for an underground diaphragm wall. The connector counter-force box for the underground diaphragm wall comprises I-shaped steel, a V-shaped steel plate which is arranged in a protruding mode is welded to an opening in one side of the I-shaped steel, and an abutting cavity is formed by a containing cavity between the I-shaped steel and the V-shaped steel plate. A filling bag is arranged in the abutting cavity, a plurality of expansion bags are installed in the filling bag, and elastic abutting parts are arranged on the two sides of each expansion bag. According to the connector counter-force box for the underground diaphragm wall, the contact area between the connector counter-force box and concrete during wall pouring is increased through the arranged V-shaped steel plates, so that the transverse pressure of the concrete on the I-shaped steel is reduced, deformation of the I-shaped steel and the V-shaped steel plates and concrete streaming can be reduced, the V-shaped grooves are reserved after the first wall is poured, and therefore the structure of the connector counter-force box is improved. And when the wall body adjacent to the first wall body is subsequently poured, concrete poured on the adjacent wall body flows into the V-shaped groove, so that the first wall body and the adjacent wall body are connected more firmly.

Description

Technical Field

[0001] The utility model relates to the technical field of underground continuous wall construction, in particular to a joint reaction box for an underground continuous wall. Background Art

[0002] As one of the most effective foundation pit support structures, underground continuous walls are widely used in a large number of underground projects. However, due to the relatively complex construction process of underground continuous walls, there are inevitable construction joints between two adjacent slot sections in the longitudinal direction, and the construction joints often become weak points in resisting ultra-deep water and soil pressure. During construction and use, the joints should meet the requirements of force and anti-seepage, and strive to be simple in construction, so as not to cause difficulties in the formation of the next unit slot section; and the commonly used joint methods for underground continuous wall construction include lock pipe joints, joint box joints and prefabricated component joints. Among various joint methods, lock pipe flexible joints are widely used due to their simple construction and low cost, but there are unavoidable deviations in the construction process, such as the verticality of the slot, the deviation of the steel cage hoisting, and the incomplete wall brushing. Many factors often lead to mud and slurry leakage in the joints during the wall construction process. During the foundation pit excavation process, it manifests as insufficient joint strength, water seepage, and poor integrity of the wall, which seriously affects the construction and use of underground structures.

[0003] Therefore, it is necessary to provide a new underground continuous wall joint reaction box to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a joint reaction box for underground continuous wall.

[0005] The joint reaction box for underground continuous wall provided by the utility model comprises an I-beam, one side opening of the I-beam is welded with a V-shaped steel plate convexly arranged, and the cavity between the I-beam and the V-shaped steel plate constitutes an abutment cavity;

[0006] A filling bag is arranged in the abutment cavity, and a plurality of expansion bags are installed in the filling bag. Elastic abutment parts are arranged on both sides of the expansion bag. The two elastic abutment parts are respectively perpendicular to the two steel plates of the V-shaped steel plate. A water inlet interface is fixedly installed on the top of the filling bag, and a drain valve is installed on the bottom of the filling bag.

[0007] The adjacent expansion bags are connected in series through a middle pipe, and the middle pipes in the top and bottom filling bags respectively penetrate the top and bottom of the filling bags and are both equipped with valves.

[0008] Preferably, the elastic abutment portion and the expansion bag are communicated with each other, and the bag surface of the elastic abutment portion is an elastic pleated structure.

[0009] Preferably, the plurality of expansion bladders divide the interior of the filling bladder into a plurality of sealed compartments.

[0010] Preferably, a through tube for connecting adjacent sealed compartments is fixedly embedded in each of the expansion bladders.

[0011] Preferably, the filling bag comprises an inner liner layer, a skeleton layer and a wear-resistant layer, the skeleton layer is sleeved outside the inner liner, and both ends of the skeleton layer are connected to the inner liner layer through flanges, and the outer side of the skeleton layer is coated with a wear-resistant coating.

[0012] Preferably, a plurality of hanging lugs are welded to the top of the I-beam.

[0013] Compared with the related art, the underground continuous wall joint reaction box provided by the utility model has the following beneficial effects:

[0014] The V-shaped steel plate provided in the utility model increases the contact area with the concrete during the wall casting, thereby reducing the lateral pressure of the concrete on the I-shaped steel, thereby reducing the deformation of the I-shaped steel and the V-shaped steel plate and the concrete bypass, and a V-shaped groove is left after the first wall is cast, and when the wall adjacent to the first wall is subsequently cast, the concrete cast in the adjacent wall flows into the V-shaped groove, so that the connection between the first wall and the adjacent wall is more firmly established;

[0015] The utility model can effectively play the role of a reaction box after the filling bag is filled with water and pressurized. During construction, the filling bag completely fills the abutment cavity, which can well prevent the I-beam and the V-shaped steel plate on the opening from deforming and concrete from flowing around. The elastic abutment portion arranged in the expansion bag extends toward the V-shaped steel plate after water injection, so that the steel plates on both sides of the V-shaped steel plate can be vertically supported, further improving the strength of the I-beam's anti-strain force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a preferred embodiment of a joint reaction box for an underground continuous wall provided by the utility model;

[0017] Figure 2 for Figure 1 A schematic cross-sectional view of the filling capsule shown;

[0018] Figure 3 for Figure 2 Schematic diagram of the structure of the expansion bladder shown.

[0019] Numbers in the figure: 1, I-beam; 11, lifting ear; 2, V-shaped steel plate; 3, abutment cavity; 4, filling bag; 41, water inlet interface; 42, drain valve; 5, expansion bag; 51, elastic abutment part; 52, middle connecting pipe; 53, through-pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0022] See also Figures 1 to 3 An embodiment of the utility model provides a joint reaction box for an underground continuous wall, and the joint reaction box for an underground continuous wall includes: an I-beam 1, a V-shaped steel plate 2, a filling bag 4 and an expansion bag 5.

[0023] In the embodiments of the present invention, please refer to Figure 1 A V-shaped steel plate 2 convexly arranged is welded to an opening on one side of the I-beam 1, and the cavity between the I-beam 1 and the V-shaped steel plate 2 constitutes a mating cavity 3, and a plurality of lifting ears 11 are welded to the top of the I-beam 1 to facilitate the lifting of the I-beam 1.

[0024] It should be noted that the V-shaped steel plate 2 increases the contact area with the concrete during wall pouring, thereby reducing the lateral pressure of the concrete on the I-beam 1, thereby reducing the deformation of the I-beam 1 and the V-shaped steel plate 2 and the concrete bypass;

[0025] It should also be noted that the joint reaction box composed of the I-beam 1, the V-shaped steel plate 2, and the internal filling bag 4 and the expansion bag 5 does not require a locking pipe process, which reduces the construction process and shortens the construction period. The joint box prevents concrete turbulence and does not require joint brushing to make the wall joint more firmly connected.

[0026] It is worth noting that a V-shaped structure for engaging the V-shaped steel plate 2 is reserved in the steel cage in the first wall, so that a V-shaped groove is left after the first wall is cast. When the wall adjacent to the first wall is subsequently cast, the concrete cast in the adjacent wall flows into the V-shaped groove, thereby making the connection between the first wall and the adjacent wall more firmly.

[0027] In the embodiments of the present invention, please refer to Figure 2 and Figure 3A filling bag 4 is provided in the abutment cavity 3, and a plurality of expansion bags 5 are installed in the filling bag 4. The plurality of expansion bags 5 divide the interior of the filling bag 4 into a plurality of sealed chambers, and a through pipe 53 for connecting adjacent sealed chambers is fixedly embedded in each of the expansion bags 5, and elastic abutment parts 51 are provided on both sides of the expansion bag 5, and the two elastic abutment parts 51 respectively face the two steel plates of the V-shaped steel plate 2 vertically, and the elastic abutment parts 51 are communicated with the expansion bag 5, and the bag surface of the elastic abutment part 51 is an elastic pleated structure, a water inlet interface 41 is fixedly installed on the top of the filling bag 4, and a drain valve 42 is installed on the bottom of the filling bag 4, and adjacent expansion bags 5 are connected in series through a middle pipe 52, and the middle pipe 52 in the top and bottom filling bags 4 respectively penetrate the top and bottom of the filling bag 4 and are both installed with valves.

[0028] It should be noted that: the filling bladder 4 is suspended in the abutment cavity 3, and the water inlet interface 41 and the middle pipe 52 at the top of the filling bladder 4 are connected to the drainage pipe in the water supply tank by using a catheter, and water is respectively injected into the filling bladder 4 and the expansion bladder 5 by using a water pump, and the water enters each expansion bladder 5 in turn through the middle pipe 52, and the filling bladder 4 after water injection and pressurization can effectively play the role of a reaction box. During construction, the filling bladder 4 completely fills the abutment cavity 3, which can well prevent the I-beam 1 and the upper V-shaped steel plate 2 of the opening from being deformed and the concrete from flowing around;

[0029] It is worth noting that the elastic abutment portion 51 provided in the expansion bladder 5 extends toward the V-shaped steel plate 2 after water injection, so as to vertically support the steel plates on both sides of the V-shaped steel plate 2, further improving the strength of the I-beam 1 in resisting strain.

[0030] Among them, the filling bag 4 includes an inner liner layer, a skeleton layer and a wear-resistant layer. The skeleton layer is sleeved outside the inner liner, and the two ends of the skeleton layer are connected to the inner liner layer through flanges. The outer side of the skeleton layer is coated with a wear-resistant coating. The skeleton layer is used to withstand pressure, and the wear-resistant coating plays a protective role. In this embodiment, the inner liner layer, skeleton layer and wear-resistant layer in the filling bag 4 are not subject to material restrictions, and are selected by the staff during specific implementation.

[0031] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A joint reaction box for underground continuous wall, characterized in that: It comprises an I-beam (1), one side opening of the I-beam (1) is welded with a V-shaped steel plate (2) which is arranged protruding outwards, and the cavity between the I-beam (1) and the V-shaped steel plate (2) forms an abutment cavity (3); A filling bag (4) is provided in the abutment cavity (3), and a plurality of expansion bags (5) are installed in the filling bag (4), elastic abutment portions (51) are provided on both sides of the expansion bag (5), and the two elastic abutment portions (51) respectively face vertically to the two steel plates of the V-shaped steel plate (2), a water inlet interface (41) is fixedly installed on the top of the filling bag (4), and a drain valve (42) is installed on the bottom of the filling bag (4); Adjacent expansion bags (5) are connected in series via a middle pipe (52), and the middle pipes (52) in the top and bottom filling bags (4) respectively penetrate the top and bottom of the filling bags (4) and are both equipped with valves.

2. The joint reaction box for underground continuous wall according to claim 1, characterized in that: The elastic abutment portion (51) and the expansion bag (5) are in communication with each other, and the bag surface of the elastic abutment portion (51) is an elastic pleated structure.

3. The joint reaction box for underground continuous wall according to claim 1, characterized in that: The plurality of expansion bags (5) divide the interior of the filling bag (4) into a plurality of sealed compartments.

4. The joint reaction box for underground continuous wall according to claim 3, characterized in that: A through-tube (53) for connecting adjacent sealed compartments is fixedly embedded in each of the expansion bladders (5).

5. The joint reaction box for underground continuous wall according to claim 1, characterized in that: The filling bag (4) comprises an inner liner layer, a skeleton layer and a wear-resistant layer, the skeleton layer is sleeved outside the inner liner, and two ends of the skeleton layer are connected to the inner liner layer through flanges, and the outer side of the skeleton layer is coated with a wear-resistant coating.

6. The joint reaction box for underground continuous wall according to claim 1, characterized in that: A plurality of hanging lugs (11) are welded to the top of the I-beam (1).

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