CN213452051U

CN213452051U - Along with bridge laying gas pipeline structure

Info

Publication number: CN213452051U
Application number: CN202022130701.0U
Authority: CN
Inventors: 马超
Original assignee: Nanjing Gas Engineering Design Institute Co ltd
Current assignee: Nanjing Gas Engineering Design Institute Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-06-15
Anticipated expiration: 2030-09-25

Abstract

The utility model relates to a bridge-laying gas pipeline structure, which comprises a first gas pipeline buried under the road surface, a second gas pipeline fixed under the bridge deck, a turning elbow connecting the first gas pipeline and the second gas pipeline, and an anti-settling pipe trench; the anti-settling pipe trench includes a bottom plate, four side walls that are arranged on the bottom plate and are enclosed end-to-end, and a cover plate that is tightly covered on the top of the side walls, and the first gas pipe transversely penetrates the anti-settling pipe The two opposite side walls of the pipe trench are connected to the steering elbow, and dry sand is filled in the inner space of the anti-settling pipe trench; the connection between the first gas pipe and the side wall is provided with a steel sleeve, and the steel sleeve is tightly fitted In the perforation of the side wall, the first gas pipe is inserted into the steel casing. The utility model greatly improves the flexibility of the gas pipes laid along the bridge, can effectively compensate for soil settlement, avoids the gas pipelines being subjected to shear force, and solves the problem of structural damage to the gas pipelines caused by uneven settlement.

Description

Along with bridge laying gas pipeline structure

Technical Field

The utility model relates to a lay gas pipeline structure along with bridge belongs to gas pipeline construction technical field.

Background

Along with the rapid development of the gas industry and urban construction in China, the urban gas supply range is wider and wider, and gas conveying pipelines are distributed all over the country. However, many cities have complex terrains, particularly southern cities, wide water distribution and numerous bridges, the situation that a gas conveying pipeline needs to pass through the water area is difficult to avoid in the gas supply process, and the scheme of laying along with the bridges is widely adopted in many areas due to the advantages of relatively simple construction, low engineering cost, fast construction progress, convenience in inspection and maintenance and the like.

The method comprises the following steps of according to whether a gas pipeline is in contact with the atmosphere or not, dividing the gas pipeline along with a bridge into an overhead laying mode and a pipe trench laying mode, wherein the overhead laying mode is that the pipeline is laid in a reserved pipe hole, erected on a pier or suspended below a side sidewalk of the bridge and the like, the pipe trench laying mode is that the gas pipeline is laid in a reserved pipe trench below a bottom plate of the side sidewalk of the bridge, and the periphery of the pipe trench is filled with dry river sand. However, no matter which type of laying mode is used, once the foundations on the two sides of the bridge are settled, the settling rate of soil is high, the settling amount of soil is large, the settling rate of a bridge pier is low, the settling amount of the bridge pier is small, uneven displacement of the soil can generate a large shearing effect on the gas pipeline, when the shearing force exceeds the yield limit of the gas pipeline, plastic deformation and even fracture of the gas pipeline can be caused, and great potential safety hazards are brought.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned problem that prior art exists, the utility model aims to provide a lay gas pipeline structure along with the bridge.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a structure for laying a gas pipeline along with a bridge comprises a first gas pipe embedded below the road surface, a second gas pipe fixed below the bridge floor, a steering elbow connecting the first gas pipe and the second gas pipe, and an anti-settling pipe ditch embedded below the road surface; the anti-settling pipe ditch comprises a bottom plate, four side walls and a cover plate, wherein the four side walls are arranged on the bottom plate and surround the bottom plate end to end, the cover plate is tightly covered on the tops of the side walls, the first gas pipe transversely penetrates through the two opposite side walls of the anti-settling pipe ditch and then is connected with a steering elbow, and dry sand is filled in a gap inside the anti-settling pipe ditch; the joint of the first gas pipe and the side wall is provided with a steel sleeve, the steel sleeve is tightly sleeved in the through hole of the side wall, the first gas pipe penetrates through the steel sleeve, and an elastic filler is filled in a gap between the first gas pipe and the steel sleeve.

The utility model discloses a further improvement lies in: the bottom plate is a plain concrete cushion layer, and the area of the plain concrete cushion layer exceeds the area of a cavity formed by the surrounding of the side walls.

The utility model discloses a further improvement lies in: the first gas pipe and the steel sleeve are axially and eccentrically arranged, and the first gas pipe is close to the bottom wall of the steel sleeve.

The utility model discloses a further improvement lies in: and a reinforcing sleeve for reinforcing the connection strength is arranged at the joint of the steering elbow and the second fuel pipe, and the reinforcing sleeve penetrates through the road surface filling layer and the end part of the bridge deck.

The utility model discloses a further improvement lies in: the top of the side wall is also provided with a plain concrete top block, and the cover plate covers the plain concrete top block; and a cement mortar sealing layer is arranged at the joint of the plain concrete top block and the cover plate.

Due to the adoption of the technical scheme, the utility model discloses the technological progress who gains is:

the utility model provides a lay gas pipeline structure along with the bridge, greatly improved and laid the flexibility and the reliability of gas pipe along with the bridge, can carry out effective compensation to subsiding of soil, avoid the gas pipeline to receive the effect of shearing force and warp, improved the life of gas pipeline, greatly degree has reduced the leakage risk of gas, has improved the security performance. Through experimental proof, the utility model discloses an effective offset is not less than 10cm, can satisfy the gas pipeline of most of areas and prevent subsiding the user demand, has solved the gas pipeline because of the structure destruction problem of inhomogeneous settlement production. The utility model discloses can improve along with bridge laying gas pipeline department original, whole earthwork excavation volume is few, and it is little to reform transform work load, low cost, and overall structure does not contain vulnerable part, good reliability, long service life.

The utility model discloses a turn to the elbow and connect first gas pipe and second gas pipe, turn to the elbow and form by 90 elbow butt joints, increased the structural flexibility when using 45 elbows to connect, the direction of stress is unanimous, but natural compensation shear stress increases the ability that the gas pipeline bore the shearing force.

The utility model discloses a prevent subsiding the trench and protect first gas pipe, prevent through the apron that upper soil subsides and produce the shearing force to the gas pipe, simultaneously, cavity in the trench has increased the activity space of first gas pipe under stress state, is convenient for release stress. The pipe ditch cavity is filled with dry sand, coats the outer wall of the first gas pipe, and uniformly disperses shearing force and avoids the damage of stress concentration to the pipeline.

Set up the steel casing pipe between first gas pipe and the anti-settling trench lateral wall, adopt eccentric mounting between first gas pipe and the steel casing pipe for anti-settling trench has certain whole settlement safety range. When the settlement amount of the pipe ditch is within the settlement safety range, the first gas pipe is free from the action of shearing force. Elastic filler is filled in gaps between the first gas pipe and the steel sleeve, so that the gas pipeline is effectively supported, rigid contact is avoided, and stress risk of the gas pipeline is reduced.

The utility model discloses a plain concrete bed course is as preventing subsiding the bottom plate of trench, provides the outrigger for the lateral wall on the one hand, and on the other hand has effectively improved the condition of subsiding of soil.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of the anti-settling trench of FIG. 1;

FIG. 3 is a schematic sectional view taken along line A-A in FIG. 1;

figure 4 is a steering elbow including a horizontal bend.

The device comprises a first gas pipe, a second gas pipe, a base plate, a side wall, a cover plate, a turning elbow, a reinforcing pipe sleeve, a steel sleeve, an elastic filler, a plain concrete top block, a cement mortar sealing layer, a dry sand and a reinforcing pipe sleeve, wherein the first gas pipe, the second gas pipe, the base plate, the side wall, the cover plate.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways than those specifically described herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

The embodiment of the utility model provides a lay gas pipeline structure along with bridge, as shown in fig. 1 ~ 3, including bury underground first gas pipe 1 in the road surface below, fix second gas pipe 2 in the bridge floor below, connect first gas pipe 1 and second gas pipe 2 turn to elbow 6, still including burying underground the pipe ditch that subsides of preventing in the road surface below.

The anti-settling pipe ditch comprises a bottom plate 3, four side walls 4 arranged on the bottom plate 3 and surrounded end to end, and a cover plate 5 covering the tops of the side walls 4. The first gas pipe 1 transversely penetrates through two opposite side walls 4 of the anti-settling pipe ditch and is connected with the second gas pipe 2 through a steering elbow 6, and dry sand 12 is filled in a gap inside the anti-settling pipe ditch. The steering elbow 6 is formed by combining 90-degree elbows, a reinforcing sleeve 7 for enhancing the connection strength is arranged at the joint of the steering elbow 6 and the second fuel pipe 2, the reinforcing sleeve 7 penetrates through a road surface soil filling layer and the end part of the bridge deck, and the length of the reinforcing sleeve 7 extending out of the end part of the bridge deck is not less than 0.25m, preferably 0.3 m. 90 elbows can effectively improve the connection flexibility of gas pipe, reduce the shearing force stress surface.

The bottom plate 3 is the plain concrete bed course, and the plain concrete bed course is hard and difficult deformation, for lateral wall 4 provides stable support, and furthest avoids lateral wall 4 to take place to subside. The area of the plain concrete cushion exceeds the area of a cavity formed by the surrounding of the side walls 4, so that the side walls 4 are not easy to incline.

A steel sleeve 8 is arranged at the joint of the first gas pipe 1 and the side wall 4, the steel sleeve 8 is tightly sleeved in a through hole of the side wall 4, the first gas pipe 1 and the steel sleeve 8 are axially and eccentrically arranged, and the first gas pipe 1 is close to the bottom wall of the steel sleeve 8; elastic filler 9 is filled in a gap between the first fuel gas pipe 1 and the steel sleeve 8, so that stable support is provided for the first fuel gas pipe 1, and rigid contact between the steel sleeve 8 and the first fuel gas pipe 1 is avoided; the elastic filler 9 is preferably a polyurethane foam material, and has the advantages of light weight, good rebound resilience and stable support.

Preferably, a gasket for enhancing the sealing property is arranged between the steel sleeve 8 and the perforation of the side wall 4.

The top of lateral wall 4 still is provided with plain concrete kicking block 10, and apron 5 lid closes in plain concrete kicking block 10 top to the reinforcing is to the support intensity of apron 5, reduces the road surface pressure and to the effect of sinking of preventing subsiding the trench. Plain concrete kicking block 10 is provided with cement mortar sealing layer 11 with the handing-over department of apron 5, and cement mortar pouring realizes sealed in getting into the handing-over gap, avoids inside moisture gets into the trench.

Preferably, the side wall 4 is made of reinforced concrete, the bottom plate 3 and the cover plate 5 are made of plain concrete, and the side wall 4 and the bottom plate 3 can be connected through pouring or can be fixedly connected through mechanical structures such as bolts. The cover plate 5 is also provided with a lifting hook convenient to assemble and disassemble.

When the first gas pipe 1 and the second gas pipe 2 only have height difference, the steering elbow 6 is formed by reversely welding two 90-degree elbows; when the first gas pipe 1 and the second gas pipe 2 have a height difference and a lateral displacement difference, the turning elbow 6 further comprises a horizontal bending part as shown in fig. 4.

The utility model discloses a theory of operation does:

when the upper soil layer is slightly settled, the cover plate and the plain concrete cushion layer can be effectively supported, the pipe ditch can be settled without settlement, and the first gas pipe is not stressed; along with the increase of the soil settlement amount, the pipe ditch capable of settling is subjected to integral settlement, and the first gas pipe is not stressed and deformed within the safe settlement range.

Meanwhile, the steering elbow composed of 90-degree elbows can effectively improve the flexibility of the pipeline and reduce the stress surface of the shearing force.

The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.

Claims

1. A structure for laying gas pipelines with a bridge, characterized in that: it comprises a first gas pipe (1) buried under a road surface, a second gas pipe (2) fixed under a bridge deck, and a first gas pipe connected to the first gas pipe. (1) and the turning elbow (6) of the second gas pipe (2), and the anti-settling pipe trench buried under the road surface; 3) The four side walls (4) that are enclosed at the end and end, and the cover plate (5) tightly covered on the top of the side walls (4), the first gas pipe (1) transversely runs through the anti-settling The two opposite side walls (4) of the pipe trench are connected and turned to the elbow (6), and dry sand (12) is filled in the inner space of the anti-settling pipe trench; the first gas pipe (1) is connected to the A steel sleeve (8) is provided at the joint of the side wall (4), the steel sleeve (8) is tightly fitted into the perforation of the side wall (4), and the first gas pipe (1) is pierced through In the steel sleeve (8), an elastic filler (9) is filled in the gap between the first gas pipe (1) and the steel sleeve (8).

2 . The structure for laying gas pipelines with a bridge according to claim 1 , wherein the bottom plate ( 3 ) is a plain concrete cushion, and the area of the plain concrete cushion exceeds the enclosure of the side walls ( 4 ). 3 . The formed cavity area.

3. A bridge-laying gas pipeline structure according to claim 1, characterized in that: the first gas pipe (1) and the steel casing (8) are axially eccentrically arranged, and the first gas pipe (1) and the steel casing (8) are arranged axially eccentrically The gas pipe (1) is close to the bottom wall of the steel sleeve (8).

4. A bridge-laying gas pipeline structure according to claim 1, characterized in that: the connection between the steering elbow (6) and the second gas pipe (2) is provided with a connection strength for strengthening the connection strength. A reinforcement sleeve (7) is provided, and the reinforcement sleeve (7) penetrates the road fill layer and the end of the bridge deck.

5 . The structure for laying gas pipelines with a bridge according to claim 1 , characterized in that: the top of the side wall ( 4 ) is further provided with a plain concrete top block ( 10 ), and the cover plate ( 5 ) covers A cement mortar sealing layer (11) is provided at the junction of the plain concrete top block (10) and the cover plate (5).