CN211947887U

CN211947887U - Overflow temporary bridge

Info

Publication number: CN211947887U
Application number: CN202020298532.9U
Authority: CN
Inventors: 孙喜红; 卫芷; 李培旭; 邓俊; 牛瑞波
Original assignee: China Shanxi Sijian Group Co Ltd
Current assignee: China Shanxi Sijian Group Co Ltd
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2020-11-17
Anticipated expiration: 2030-03-12

Abstract

The utility model relates to a water overflow temporary bridge, which comprises a lower foundation, a socket pipe and an upper structure; the lower foundation comprises a first stone layer, a graded broken stone leveling layer and a first concrete cushion layer from bottom to top; the plurality of socket pipes are arranged at the upper part of the first concrete cushion layer along the water flow direction, and a second concrete cushion layer is filled between the two socket pipes and on the tops of the socket pipes; the superstructure comprises a reinforced concrete deck cast on top of the second concrete pad. Protective railings are erected on two sides of the reinforced concrete bridge floor in a through-length mode. The utility model discloses a lay prefabricated reinforced concrete socket pipe in the river course of sclerosis treatment and as sluicing passageway, adopt cast in situ reinforced concrete bridge floor as load-carrying members, form the current temporary bridge that can flood fast. The socket pipe forms stable arch structure when guaranteeing smooth sluicing and is convenient for the upper portion load to stably spread to the basis, has strengthened the suspension bridge and has crossed the water capacity, has guaranteed the overall stability of suspension bridge.

Description

Overflow temporary bridge

Technical Field

The utility model relates to a temporary bridge particularly, relates to a temporary bridge facility that is arranged in supplementary construction or current usefulness in wading (middle and small river) road engineering.

Background

With the continuous development and progress of the national bridge construction technology, the bridge-tunnel ratio is increased year by year in the construction of traffic infrastructure, the temporary bridge is used as a common major temporary passing facility in road or municipal bridge engineering, and the input proportion of project and measure expenses is directly determined by the structure type selection and the adopted construction method during the construction. Therefore, the stability and durability of the construction method must be ensured according to local conditions, the site construction is ensured to be carried out smoothly, and the safety of nearby residents is ensured.

The steel temporary bridge commonly used in the prior art comprises a steel upright post and a Bailey beam, and has the defects of high engineering cost and low construction speed if the steel temporary bridge disclosed by the Chinese utility model patent with the granted publication number of CN 203684060U.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a water overflow temporary bridge, but reach the purpose of quick construction at least.

For solving the above technical problem, the utility model discloses a technical scheme is:

a flood bridge comprises a lower foundation, a socket pipe and an upper structure;

the lower foundation comprises a first stone layer, a graded broken stone leveling layer and a first concrete cushion layer from bottom to top;

the plurality of socket pipes are arranged at the upper part of the first concrete cushion layer along the water flow direction, and a second concrete cushion layer is filled between the two socket pipes and on the tops of the socket pipes;

the superstructure comprises a reinforced concrete deck cast on top of the second concrete pad.

Furthermore, the pipe fitting also comprises an I-shaped steel supported on the side surface of the socket pipe.

Further, a second rubble layer built on the platform back of the temporary bridge is included.

Furthermore, a rubble layer is laid on the upper portion of the second rubble layer, and a reinforced concrete bridge surface is poured on the upper portion of the rubble layer.

Furthermore, the socket pipe is a prefabricated reinforced concrete pipe.

Furthermore, protective railings are erected on two sides of the reinforced concrete bridge floor in a through and long mode.

The utility model discloses a lay prefabricated reinforced concrete socket pipe in the river course of sclerosis treatment and as sluicing passageway, adopt cast in situ reinforced concrete bridge floor as load-carrying members, form the current temporary bridge that can flood fast. The socket pipe forms stable arch structure when guaranteeing smooth sluicing and is convenient for the upper portion load to stably spread to the basis, has strengthened the suspension bridge and has crossed the water capacity, has guaranteed the overall stability of suspension bridge.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention in any way.

Fig. 1 is a schematic cross-sectional view of the overflow access bridge of the present invention.

Fig. 2 is a schematic longitudinal section view of the water-overflowing access bridge 1/2 of the present invention.

In the figure, 1-a first stone layer, 2-a graded broken stone leveling layer, 3-a first concrete cushion layer, 4-a socket pipe, 5-a second concrete cushion layer, 6-a reinforced concrete bridge deck, 7-I-shaped steel, 8-a second stone layer and 9-a rubble layer.

Detailed Description

In order to make the present invention better understood by those skilled in the art, the present invention will be further clearly and completely described below with reference to the accompanying drawings and embodiments. In addition, the features of the embodiments and examples in the present application may be combined with each other without conflict.

In the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The utility model relates to a water overflow temporary bridge that typical embodiment provided, including lower part basis, socket pipe and superstructure. The lower foundation comprises a first stone layer 1, a graded broken stone leveling layer 2 and a first concrete cushion layer 3 from bottom to top; a plurality of socket pipes are arranged at the upper part of the first concrete cushion 3 along the water flow direction, and a second concrete cushion 5 is filled between the two socket pipes 4 and on the pipe tops of the socket pipes 4; the superstructure comprises a reinforced concrete deck 6 cast on top of a second concrete pad 5.

The socket pipe 4 is a prefabricated reinforced concrete pipe, and can be quickly constructed on site by prefabricating in advance.

According to the above embodiment, the river channel is hardened by constructing the lower foundation, the socket pipes are laid on the lower foundation as the drainage channels, and the cast-in-place reinforced concrete bridge floor 6 is adopted as the bearing structure for the upper structure, so that the passing temporary bridge capable of overflowing water is quickly formed.

The reinforcing bars in the reinforced concrete bridge deck pavement mainly bear the tensile stress of the load of a travelling crane, and the lower reinforced concrete prefabricated socket pipe forms a stable arch structure while ensuring smooth water drainage so as to facilitate the stable diffusion of the load on the upper part to the foundation. For seasonal rivers, the rivers can pass through the embedded circular pipes in the dry season; in rainy seasons, rivers can pass through the temporary bridge from the bridge floor and the circular pipe simultaneously, the design enhances the water passing capacity of the temporary bridge and ensures the integral stability of the temporary bridge. According to the river channel and water flow condition of the construction site, the extension or the guide modification can be carried out at any time.

Preferably, the I-shaped steel 7 is supported on the side surface of the socket pipe 4, and the stability of the socket pipe is kept through the I-shaped steel 7.

Preferably, the temporary bridge comprises a second rubble layer 8 built on the platform back of the temporary bridge, and rubbles are embedded into the embankments on the two sides, so that the overall stability of the temporary bridge is further ensured. Preferably, the gravel layer 9 is paved on the upper part of the second rubble layer 8, and the reinforced concrete bridge surface 6 is poured on the upper part of the gravel layer 9.

Preferably, protective railings are erected on two sides of the reinforced concrete bridge floor 6 in a through-length mode. Two transverse rods or upright columns can be arranged according to actual conditions on site, so that the passing safety of the temporary bridge is ensured.

The flooding access bridge does not need special materials or machinery in the construction process, and local materials are convenient to obtain. The socket pipe does not need complex construction technology, is easy to operate, can be prefabricated into a socket pipe in advance, can be constructed on site quickly, and saves the construction period. Compared with the existing common steel temporary bridge, the construction cost can be effectively and greatly reduced.

The claimed invention is further illustrated by the following relatively specific example.

1. River course leading change

Firstly, a diversion trench is made to conduct diversion modification on an original river channel, a water retaining cofferdam is arranged at a position 10m away from the upstream and the downstream of the temporary bridge respectively, water flow at the construction position of the temporary bridge is led into the diversion trench, and then a riprap silt squeezing and hardening method is adopted to carry out riprap silt squeezing and hardening on a river channel substrate.

2. Temporary bridge foundation construction

The lower part foundation is directly formed by throwing and filling large rubbles to form a first stone layer 1 with the thickness of 100cm, a large excavator bucket is used for extruding and compacting downwards, and then 30cm graded broken stones are adopted to fill on the first stone layer 1 and a C20 first concrete cushion layer with the thickness of 10cm is poured to level. And earthwork of the embankments on the two sides of the river channel is excavated according to the elevation of the bottom of the foundation on the lower part, so that the rubbles of the second rubble layer 8 built on the platform back of the temporary bridge are embedded into the embankments on the two sides. And a gravel layer 9 is laid on the upper part of the second rubble layer 8, and the reinforced concrete bridge surface 6 is poured on the upper part of the gravel layer 9.

3. Construction of upper structure of temporary bridge

Hoisting the prefabricated reinforced concrete socket pipes with the inner diameter of 2m in place by using a crane, filling a C20 second concrete cushion layer between the two pipes and within the range of 10cm higher than the top of the pipes, building bricks at two ends of the pipe sides to fix the pipes, and designing the bridge deck as a reinforced mesh cast-in-place panel with the thickness of 40 cm.

4. Bridge floor railing arrangement

The protective railings are additionally arranged on the two sides of the temporary bridge in a through mode, and two cross rods or upright posts can be arranged according to actual conditions on site.

The scope of the invention is not limited to the above embodiments, and various modifications and changes may be made by those skilled in the art, and any modifications, improvements and equivalents made within the spirit and principle of the invention are intended to be included within the scope of the invention.

Claims

1. A kind of flood access bridge, characterized by: comprises a lower foundation, a socket pipe and an upper structure;

2. The flooding access bridge of claim 1, wherein: the socket pipe is characterized by also comprising an I-shaped steel supported on the side surface of the socket pipe.

3. The flooding access bridge of claim 1 or 2, wherein: comprises a second rubble layer built on the platform back of the temporary bridge.

4. The flooding access bridge of claim 3, wherein: and a rubble layer is laid on the upper part of the second rubble layer, and the reinforced concrete bridge deck is poured on the upper part of the rubble layer.

5. The flooding access bridge of claim 1, 2 or 4 wherein: the socket pipe is a reinforced concrete prefabricated pipe.

6. The flooding access bridge of claim 5, wherein: protective railings are erected on two sides of the reinforced concrete bridge floor in a through-length mode.