A kind of waterproof and drainage device for hollow slab bridge outer package concrete reinforcing structure

Abstract

The utility model discloses a waterproof and drainage device for hollow slab bridge outer package concrete reinforcing structure relates to bridge engineering technical field, including the waterproof and drainage device of setting in the bridge and outer package concrete reinforcing structure between, and waterproof and drainage device is by annular drainage pipe, transverse drainage pipe, vertical drainage pipe, non -woven waterproof layer and EVA waterproof board constitutes, and annular drainage pipe is arranged below every original bridge hinge joint along the bridge transverse and is fixedly connected in original bridge hollow slab, and the length of extending to the front of original bridge abutment and extending downward after a certain is connected with transverse drainage pipe, and drainage slope is same with bridge longitudinal slope, and transverse drainage pipe is arranged in the front of original bridge abuttment and is fixedly connected with it, and is arranged and sets up two -way 3% drainage slope along the bridge transverse, in this scheme, through setting up waterproof and drainage device, the bottom surface water seepage efflorescence problem that hollow slab bridge appears after adopting outer package concrete reinforcing is solved, and the durability and the aesthetic property of reinforcing structure are improved.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering, specifically a drainage device for the concrete-encased reinforcement structure of hollow slab bridges. Background Technology

[0002] Hollow slab bridges are the earliest and most widely used type of small-span beam bridge. With the increasing traffic volume and heavy vehicles, hollow slab bridges often experience problems such as insufficient structural stiffness and load-bearing capacity. Enlarging the cross-section with external concrete is a common method for reinforcing hollow slab bridges to address these issues. However, after 2-3 years of operation, hollow slab bridges reinforced with external concrete often exhibit problems such as water seepage and efflorescence on the bottom surface of the reinforced structure, severely affecting the reinforcement effect and the durability of the external concrete, while also impacting the overall aesthetics of the structure. The main reason for this is that the hinge joints of hollow slab bridges are prone to cracking and damage during bridge operation, forming seepage channels. Combined with aging of the bridge deck pavement and damage to the waterproofing layer, rainwater from the bridge deck seeps into the reinforced concrete structure through the hinge joints.

[0003] Because the bridge is reinforced with an external concrete cladding, it is impossible to treat water seepage from underneath. Treating the bridge deck for drainage often requires redoing the pavement and re-casting the joints, resulting in high maintenance costs and traffic disruptions. Furthermore, the pavement has a relatively short lifespan, making it highly susceptible to seepage if maintenance is not timely.

[0004] Therefore, it is necessary to design a drainage device for the concrete-encased reinforcement structure of hollow slab bridges to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to provide a long-term effective, cost-effective, and easy-to-construct drainage device for the external concrete reinforcement structure of hollow slab bridges, in order to solve the problems mentioned in the background art. When installing the drainage device during the external concrete reinforcement of hollow slab bridges, it provides a drainage channel for water seepage from the hinge joints of the hollow slab bridges and prevents water seepage and efflorescence from appearing on the bottom surface of the external concrete reinforcement structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a drainage device for the external concrete reinforcement structure of a hollow slab bridge, comprising: a drainage device installed between the bridge and the external concrete reinforcement structure, the drainage device consisting of a circumferential drainage pipe, a transverse drainage pipe, a vertical drainage pipe, a non-woven waterproof layer, and an EVA waterproof sheet. The circumferential drainage pipe is arranged transversely below each original bridge hinge joint and fixedly connected to the original hollow slab of the bridge, extends longitudinally to the front of the original bridge abutment and then extends downward for a certain length before connecting with the transverse drainage pipe, the drainage slope being the same as the longitudinal slope of the bridge. The water pipe is arranged in front of the original bridge abutment and fixedly connected to it. It is arranged along the transverse direction of the bridge and has a two-way drainage slope of 3%. Both ends extend out of the outer concrete reinforcement structure and connect to the vertical drainage pipe. The vertical drainage pipe is arranged outside the outer concrete reinforcement structure and fixedly connected to it, extending all the way to the ground. The non-woven waterproof layer and the EVA waterproof board are arranged on the bottom surface of the hollow slab and in front of the bridge abutment, wrapping the circumferential drainage pipe and the transverse drainage pipe inside. The non-woven waterproof layer is arranged as the inner layer and the EVA waterproof board is arranged as the outer layer.

[0008] Furthermore, the circumferential drainage pipe extends downward in front of the original bridge abutment for a length of [30, 80] cm.

[0009] Furthermore, both the circumferential drain pipe and the transverse drain pipe are semi-circular groove-shaped PVC drain pipes, and the vertical drain pipe is a circular PVC drain pipe. The diameters of the circumferential drain pipe, the transverse drain pipe, and the vertical drain pipe are [50, 150] mm.

[0010] Furthermore, the nonwoven waterproof layer is arranged in a one-layer fabric-one-layer membrane configuration, and the EVA waterproof board has a thickness of [1, 2] mm.

[0011] The beneficial effects of this utility model are:

[0012] 1. The drainage device for the reinforced structure of hollow slab bridge with external concrete provided by this utility model is installed during the reinforcement of hollow slab bridge with external concrete. It is pre-embedded in the reinforced concrete to provide a drainage channel for water seepage through the hinge joint of the hollow slab, preventing water seepage inside the reinforced structure and surface seepage and efflorescence during later operation. It effectively ensures the durability and aesthetics of the reinforced structure and avoids the traffic closure and maintenance cost waste caused by redoing the bridge deck pavement and re-pouring the hinge joint during later maintenance.

[0013] 2. Both the circumferential and transverse drainage pipes are semi-circular groove-shaped PVC drainage pipes, which can collect water seeping from the hinge joints and discharge it through the vertical drainage pipes. The non-woven waterproof layer and EVA waterproof board prevent the water collected in the circumferential and transverse drainage pipes from overflowing and seeping into the outer concrete, forming double protection, better realizing the seepage drainage function, and ensuring the durability of the reinforced structure. Attached Figure Description

[0014] Figure 1 This is an elevation view of the present utility model;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a sample drawing of size A;

[0017] Figure 4 This is a large-scale drawing (B).

[0018] In the diagram: 1-Original bridge hollow slab, 2-Original bridge hinge joint, 3-Original bridge abutment, 4-External concrete reinforcement structure, 5-Drainage device, 5-1-Circular drainage pipe, 5-2-Horizontal drainage pipe, 5-3-Vertical drainage pipe, 5-4-Non-woven waterproof layer, 5-5-EVA waterproof board. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the embodiments.

[0020] according to Figures 1-4 As shown, this utility model provides a drainage device for a hollow slab bridge reinforced with concrete outer casing. It includes a drainage device 5 installed between the bridge and the reinforced concrete outer casing 4. The drainage device 5 consists of a circumferential drainage pipe 5-1, a transverse drainage pipe 5-2, a vertical drainage pipe 5-3, a non-woven waterproof layer 5-4, and an EVA waterproof sheet 5-5. The circumferential drainage pipe 5-1 is arranged along the transverse direction below each original bridge hinge joint 2 and fixedly connected to the original hollow slab 1 of the bridge. It collects seepage water from the bridge surface within the original bridge hinge joint 2. It extends longitudinally to the front of the original bridge abutment 3 and extends downwards for a certain length before connecting with the transverse drainage pipe 5-2. The drainage slope is the same as the longitudinal slope of the bridge. The transverse drainage pipe 5-2 is arranged in front of the original bridge abutment 3 and fixedly connected to it. It extends along the transverse direction... A long, bidirectional 3% drainage slope is provided to collect and drain the water collected from the circumferential drainage pipes 5-1. Both ends extend out of the outer concrete reinforcement structure 4 and connect to the vertical drainage pipes 5-3. The vertical drainage pipes 5-3 are arranged outside the outer concrete reinforcement structure 4 and fixedly connected to it, extending all the way to the ground to drain the collected water to the ground under the bridge. The non-woven waterproof layer 5-4 and the EVA waterproof board 5-5 are arranged on the bottom surface of the hollow slab and in front of the abutment, wrapping the circumferential drainage pipes 5-1 and the transverse drainage pipes 5-2 inside, preventing the collected water from overflowing from the circumferential drainage pipes 5-1 and the transverse drainage pipes 5-2 from seeping back into the outer concrete. The non-woven waterproof layer 5-4 is arranged in the inner layer, and the EVA waterproof board 5-5 is arranged in the outer layer.

[0021] In this embodiment, the circumferential drainage pipe 5-1 extends downwards for 50cm in front of the original bridge abutment 3. Both the circumferential drainage pipe 5-1 and the transverse drainage pipe 5-2 are semi-circular groove-shaped PVC drainage pipes, and the vertical drainage pipe 5-3 is a circular PVC drainage pipe. The diameter of the circumferential drainage pipe 5-1, the transverse drainage pipe 5-2, and the vertical drainage pipe 5-3 is 100mm. The non-woven waterproof layer 5-4 is arranged in a one-layer fabric-one-layer membrane configuration, and the EVA waterproof board 5-5 has a thickness of 1.2mm.

[0022] The construction process of this utility model is described below with reference to the accompanying drawings:

[0023] Step 1: Install circumferential drainage pipe 5-1 and transverse drainage pipe 5-2 below the original bridge hollow slab 1 and the original bridge hinge joint 2 and in front of the original bridge abutment 3, fix them together, and install non-woven waterproof layer 5-4 and EVA waterproof board 5-5 to wrap the circumferential drainage pipe 5-1 and transverse drainage pipe 5-2.

[0024] Step 2: Pour the concrete reinforcement structure 4, then lay vertical drainage pipes 5-3 on the outside of the concrete reinforcement structure 4 and fix them to it. At the same time, connect them to the end of the horizontal drainage pipes 5-2 to form a complete drainage channel, thus completing the construction of the drainage device 5.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the scope of the claims.

Claims

1. A drainage device for the concrete-encased reinforcement structure of hollow slab bridges, characterized in that, include: An external concrete reinforcement structure (4) is provided between the external concrete reinforcement structure (4) and the bridge, and a drainage system is provided between the external concrete reinforcement structure (4) and the bridge, the drainage system being composed of a circumferential drainage pipe (5-1), a transverse drainage pipe (5-2), a vertical drainage pipe (5-3), a non-woven waterproof layer (5-4), and an EVA waterproof board (5-5). The circumferential drainage pipe (5-1) is arranged along the transverse direction of the bridge below each original bridge hinge joint (2) and is fixedly connected to the original bridge hollow slab (1) to collect the bridge surface seepage water in the original bridge hinge joint (2); The transverse drainage pipe (5-2) is arranged in front of the original bridge abutment (3) and connected to the circumferential drainage pipe (5-1) for the purpose of draining and collecting water. The vertical drainage pipe (5-3) is arranged on the outside of the outer concrete reinforcement structure (4) and connected to the horizontal drainage pipe (5-2) to drain the collected water to the ground under the bridge. The non-woven waterproof layer (5-4) and the EVA waterproof board (5-5) are arranged on the bottom surface of the hollow slab and in front of the bridge abutment, enclosing the circumferential drainage pipe (5-1) and the transverse drainage pipe (5-2).

2. A drainage and waterproofing device for a hollow slab bridge reinforced with concrete outer casing, as described in claim 1, characterized in that: The circumferential drainage pipe (5-1) extends downwards for a length of 30cm to 80cm in front of the original bridge abutment (3).

3. A drainage and waterproofing device for a hollow slab bridge reinforced with concrete outer casing, as described in claim 1, characterized in that: The circumferential drain pipe (5-1) and the transverse drain pipe (5-2) are both semi-circular groove-shaped PVC drain pipes, and the vertical drain pipe (5-3) is a circular PVC drain pipe. The diameters of the circumferential drain pipe (5-1), the transverse drain pipe (5-2), and the vertical drain pipe (5-3) are 50mm to 150mm.

4. A drainage and waterproofing device for a hollow slab bridge reinforced with concrete outer casing, as described in claim 1, characterized in that: The non-woven waterproof layer (5-4) is tightly bonded to the bottom surface of the hollow slab and the front of the bridge abutment using a one-layer fabric-one-film method. The EVA waterproof board (5-5) covers the non-woven waterproof layer (5-4), and the two together wrap the circumferential drainage pipe (5-1) and the transverse drainage pipe (5-2).

5. A drainage and waterproofing device for a hollow slab bridge reinforced with concrete outer casing, as described in claim 1, characterized in that: The connection between the vertical drain pipe (5-3) and the horizontal drain pipe (5-2) is sealed with sealant or sealing ring to ensure the sealing and waterproofing of the drainage system and prevent water from seeping in from the connection.

6. A drainage and waterproofing device for a hollow slab bridge reinforced with concrete outer casing, as described in claim 1, characterized in that: The joint between the non-woven waterproof layer (5-4) and the EVA waterproof board (5-5) is sealed by hot-melt welding or special adhesive to ensure the continuity and waterproof effect of the waterproof layer and prevent moisture from seeping into the outer concrete from the joint.

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