A water-stopping force-transmitting structure for stepped joints and its construction process

Abstract

The present invention provides a water-stopping and force-transmitting structure for stepped joints. The structure comprises a left water-stopping and force-transmitting component and a right water-stopping and force-transmitting component, wherein the left and right water-stopping and force-transmitting components are connected in a concave-convex manner. The present invention can simultaneously achieve water-stopping and force-transmitting functions, and can improve the structural stress-bearing performance of the joint.

Description

Technical Field

[0001] The invention belongs to the technical field of waterproofing of underground construction projects, and in particular relates to a water-stopping force-transmitting structure for stepped joints and a construction process thereof. Background Art

[0002] As the surrounding environment for subway construction becomes increasingly complex, the construction methods for subway stations are becoming increasingly diverse. In addition to the traditional open-cut method, other methods include combined open-cut and underground excavation, open-cut and covered excavation, open-cut and covered excavation reverse construction, and open-cut and mining. Station structure construction methods in different construction method zones can differ significantly, making the creation of effective water-stopping and force-transmitting structural systems at joints a critical issue for engineering designers. In particular, when the angle between the construction method zone boundary and the longitudinal direction of the station is small, these joints can be very long and easily form integral weak spots in the station structure, adversely affecting the structural load-bearing capacity, deformation characteristics, and durability.

[0003] For water-stopping treatment of the longitudinal joints in such stations, traditional water-stopping measures for construction joints or expansion joints, such as embedded rubber waterstops and external waterproofing, are generally adopted. External waterproofing alone is generally ineffective; embedded rubber waterstops usually require special auxiliary devices to ensure accurate installation. The slightest carelessness may cause the waterstop to twist, deform, or misalign, and the surrounding concrete to become less compacted due to vibration. In addition, traditional water-stopping methods are suitable for flat joints, but are difficult to directly apply to stepped joints at the boundaries of construction method partitions. Another drawback is that traditional water-stopping methods cannot provide effective internal force transmission at the joints. Summary of the Invention

[0004] (1) Technical problems to be solved: In view of the above-mentioned defects, the present invention proposes a water-stopping force transmission structure suitable for stepped joints at the boundaries of construction method partitions. By utilizing the high elastic properties of rubber, the rubber waterstop is in close contact with the tightening load applied by the tightening bolts to effectively prevent water seepage in the joints; and the tightening bolts will provide an effective internal force transmission function in the joints, killing two birds with one stone.

[0005] (2) Technical solution: In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a water-stopping force transmission structure for a stepped joint, comprising a stepped steel plate, a stepped rubber waterstop, bolts and nuts; the stepped steel plate and the stepped rubber waterstop are fixedly connected by a glue layer; corresponding screw holes for the bolts to pass through are opened on the stepped steel plate and the rubber waterstop.

[0006] The water-stopping force transmission structure for stepped joints has a concave and convex block on the side of the stepped rubber waterstop away from the stepped steel plate. The stepped rubber waterstops are grouped in two and engage with each other through the concave and convex blocks. After the bolts pass through the screw holes and the nuts are tightened, a group of stepped rubber waterstops can be tightly fitted.

[0007] The water-stopping force-transmitting structure for the stepped joint comprises two stepped steel plates which are respectively welded and fixed to the steel bars in the first-cast concrete and the second-cast concrete.

[0008] The water-stopping force-transmitting structure for stepped joints has three sets of bolts and nuts arranged in each section, which are spaced apart in a direction perpendicular to the paper surface.

[0009] Furthermore, the material of the rubber waterstop is EPDM rubber, chloroprene rubber or styrene-butadiene rubber.

[0010] Furthermore, the glue layer is made of high temperature resistant instant glue.

[0011] Furthermore, the stepped steel plates, bolts and nuts are galvanized to improve corrosion resistance and welding performance.

[0012] The present invention also provides a construction method for a water-stopping force transmission structure for a stepped joint, comprising the following steps: 1) fixing the first stepped steel plate and the first stepped rubber waterstop, and the second stepped steel plate and the second stepped rubber waterstop respectively with glue layers, and aligning the screw holes one by one;

[0013] 2) seamlessly connecting the first stepped rubber waterstop and the second stepped rubber waterstop through the concave and convex blocks, screwing bolts through the screw holes and tightening nuts to compress the first stepped rubber waterstop and the second stepped rubber waterstop to form a combined body;

[0014] 3) Welding the first stepped steel plate to the steel bars of the pre-cast concrete, using the assembly as a lateral formwork, and pouring the pre-cast concrete;

[0015] 4) Welding the second stepped steel plate to the steel bars of the post-cast concrete, using the assembly as a lateral formwork, and pouring the post-cast concrete to obtain a water-stopping and force-transmitting structure for the stepped joint.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The rubber waterstop of the present invention is squeezed and compacted by tightening bolts and nuts, thereby enhancing the water-stopping effect; the bolts can withstand the shear force, tension and pressure transmitted by the stepped joints, thereby realizing the internal force transmission between the first cast concrete structure and the later cast concrete structure; the stepped steel plate is connected to the steel bars in the concrete structure, thereby reinforcing the stepped ends of the concrete structure and improving the structural stress performance at the joints; the rubber waterstop enables the stepped joints to have a larger allowable deformation without losing impermeability; the rubber waterstop can play a shock-absorbing and buffering role, thereby improving the seismic performance of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1The present invention provides a split structure for a water-stopping force-transmitting structure for a stepped joint;

[0019] Figure 2 The present invention provides an integral structure of a water-stopping force-transmitting structure for a stepped joint.

[0020] In the figure, 1 is a stepped steel plate group, 1-1 is a first stepped steel plate, 1-2 is a second stepped steel plate, 2 is a stepped rubber waterstop group, 2-1 is a first stepped rubber waterstop, 2-2 is a second stepped rubber waterstop, 3 are bolts, 4 are nuts, 5 are screw holes, 6 are glue layers, 7 are steel bars, 8 are first poured concrete, 9 are later poured concrete, 10 are concave and convex blocks, 10-1 are a first connecting block, and 10-2 are a second connecting block. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, a water-stopping force-transmitting structure for a stepped joint includes a stepped steel plate group 1, the stepped steel plate group 1 includes a first stepped steel plate 1-1 and a second stepped steel plate 1-2, the stepped rubber waterstop group 2 includes a first stepped rubber waterstop 2-1 and a second stepped rubber waterstop 2-2, a first bolt 3, and a nut 4; the stepped steel plate group 1 and the stepped rubber waterstop group 2 are fixedly connected by a glue layer 6; the stepped steel plate group 1 and the rubber waterstop group 2 are correspondingly provided with screw holes 5 for the bolts 3 to pass through.

[0023] like Figure 1 As shown, there is a concave-convex block 10 on the side of the stepped rubber waterstop group 2 away from the stepped steel plate 1, and the concave-convex block 10 includes a first connecting block 10-1 and a second connecting block 10-2. The first stepped rubber waterstop 2-1 and the second stepped rubber waterstop 2-2 are a group, which are engaged with each other through the concave-convex block 10; after the bolt 3 passes through the screw hole 5 and the nut 4 is tightened, a group of stepped rubber waterstops 2 can be tightly fitted.

[0024] like Figure 2 As shown, the first stepped steel plate 1 - 1 is welded and fixed to the steel bars 7 in the pre-cast concrete 8 , and the second stepped steel plate 1 - 2 is welded and fixed to the steel bars 7 in the post-cast concrete 9 .

[0025] like Figure 1 、 2As shown, three groups of bolts 3 and nuts 4 are arranged in each section, and are spaced apart in the direction perpendicular to the paper with a spacing of 1m.

[0026] The material of the rubber waterstop 2 is EPDM rubber, chloroprene rubber or styrene-butadiene rubber.

[0027] The glue layer 6 is made of high temperature resistant instant glue.

[0028] In this embodiment, the stepped rubber waterstop group 2 is squeezed and compacted by tightening the bolts 3 and nuts 4 to enhance the water-stopping effect; the bolts 3 can transmit the internal force between the first poured concrete 8 and the later poured concrete 9; the stepped steel plate group 1 is connected to the steel bars 7 in the concrete structure to improve the structural stress performance at the joint.

[0029] The present invention also provides a construction method for a water-stopping force-transmitting structure for a stepped joint, comprising the following steps:

[0030] 1) The first stepped steel plate 1-1 and the first stepped rubber waterstop 2-1, as well as the second stepped steel plate 1-2 and the second stepped rubber waterstop 2-2, are fixedly connected by glue layers 6, and the screw holes 5 are aligned one by one;

[0031] 2) The first stepped rubber waterstop 2-1 and the second stepped rubber waterstop 2-2 are seamlessly connected through the concave and convex blocks 10, the bolts 3 are screwed into the screw holes 5 and the nuts 4 are tightened to press the first stepped rubber waterstop 2-1 and the second stepped rubber waterstop 2-2 to form a combined body;

[0032] 3) Welding the first stepped steel plate 1-1 to the steel bars 7 of the precast concrete 8, and using the assembly as a lateral formwork to pour the precast concrete 8;

[0033] 4) Weld the second stepped steel plate 1-2 to the steel bars 7 of the post-cast concrete 9, use the assembly as a lateral formwork, and cast the post-cast concrete 9 to obtain a water-stopping and force-transmitting structure for the stepped joint.

[0034] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A water-stopping force transmission structure for stepped joints, characterized in that: The water-stop force transmission structure includes a left water-stop force transmission component and a right water-stop force transmission component, wherein the left water-stop force transmission component and the right water-stop force transmission component are connected with each other in a concave-convex manner to form an integral body; The left water-stop force-transmitting component comprises a first stepped steel plate (1-1), one side of the first stepped steel plate (1-1) is glued to a first stepped rubber water-stop strip (2-1), the other side of the first stepped steel plate (1-1) is welded to a steel bar (7), and pre-cast concrete (8) is poured on the steel bar (7); The right water-stop force-transmitting component comprises a second stepped steel plate (1-2), one side of the second stepped steel plate (1-2) is glued to a second stepped rubber water-stop strip (2-2), the other side of the second stepped steel plate (1-2) is welded to the steel bar (7), and post-cast concrete (9) is poured on the steel bar (7); The surfaces of the first stepped rubber waterstop (2-1) and the second stepped rubber waterstop (2-2) are both provided with concave-convex blocks (10), the first stepped rubber waterstop (2-1) and the second stepped rubber waterstop (2-2) are seamlessly connected via the concave-convex blocks (10), the first stepped steel plate (1-1), the second stepped steel plate (1-2), the first stepped rubber waterstop (2-1) and the second stepped rubber waterstop (2-2) are provided with a plurality of corresponding screw holes (5), the first stepped steel plate (1-1), the second stepped steel plate (1-2), the first stepped rubber waterstop (2-1) and the second stepped rubber waterstop (2-2) are connected via bolts (3), one end of the bolts (3) is also threadedly connected to a nut (4); The number of the bolts (3) is 3; The materials of the first stepped rubber waterstop (2-1) and the second stepped rubber waterstop (2-2) are EPDM rubber, chloroprene rubber or styrene-butadiene rubber; A glue layer (6) is provided between the first stepped steel plate (1-1) and the first stepped rubber waterstop (2-1), and between the second stepped steel plate (1-2) and the second stepped rubber waterstop (2-2), and the glue layer (6) is a high-temperature resistant instant glue; The first stepped steel plate (1-1), the second stepped steel plate (1-2), the bolt (3), and the nut (4) are all galvanized.

2. A construction method for a water-stopping force transmission structure for a stepped joint according to claim 1, characterized in that: The construction method comprises the following steps: 1) The first stepped steel plate (1-1) and the first stepped rubber waterstop (2-1), as well as the second stepped steel plate (1-2) and the second stepped rubber waterstop (2-2) are fixedly connected via glue layers (6), and the screw holes (5) are aligned one by one; 2) seamlessly connecting the first stepped rubber waterstop (2-1) and the second stepped rubber waterstop (2-2) via the concave-convex block (10), screwing the bolt (3) into the screw hole (5) and tightening the nut (4), thereby pressing the first stepped rubber waterstop (2-1) and the second stepped rubber waterstop (2-2) to form a combined body; 3) Welding the first stepped steel plate (1-1) to the steel bars (7) of the pre-cast concrete (8), using the assembly as a lateral formwork, and pouring the pre-cast concrete (8); 4) Welding the second stepped steel plate (1-2) to the steel bars (7) of the post-cast concrete (9), using the assembly as a lateral formwork, and pouring the post-cast concrete (9) to obtain a water-stopping force-transmitting structure for the stepped joint.

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