CN215758329U

CN215758329U - Central separator pipeline laying structure

Info

Publication number: CN215758329U
Application number: CN202121357879.7U
Authority: CN
Inventors: 爨飞朝
Original assignee: Electric Engineering Co Ltd of China Railway 23rd Bureau Group Co Ltd
Current assignee: Electric Engineering Co Ltd of China Railway 23rd Bureau Group Co Ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-02-08
Anticipated expiration: 2031-06-18

Abstract

The utility model discloses a pipeline laying structure of a central dividing strip, wherein an anti-cracking cement stabilizing gravel base layer is arranged on the top end surface of a graded gravel base layer, an asphalt concrete surface layer and a graded gravel layer are arranged on the top end surface of the anti-cracking cement stabilizing gravel base layer, an asphalt sand sealing layer is arranged on the top end surface of the graded gravel layer, one end of a guardrail penetrates through the asphalt sand sealing layer, the graded gravel layer, the anti-cracking cement stabilizing gravel base layer and the graded gravel base layer and is positioned on the bottom end surface of the graded gravel base layer, and a concrete encapsulating block is arranged inside the graded gravel base layer; the structure of the central isolation belt is more reasonable, the placing mode and the placing position of the pipeline are optimized, the service life of the pipeline is prolonged, and the maintenance frequency is reduced.

Description

Central separator pipeline laying structure

Technical Field

The utility model relates to the technical field of road construction, in particular to a pipeline laying structure of a central separation zone.

Background

The division strip means a strip-like facility for dividing a roadway, which is provided in the longitudinal direction of the roadway. With the proliferation of automobile reserves and the steady increase in vehicle performance, traffic participants have placed greater expectations for central banks as the primary transportation means for urban roadways. The central separation strip not only has the general functions of isolating bidirectional traffic and reducing opposite traffic interference, but also has the functions of burying communication pipelines, installing anti-dazzle facilities, protecting pedestrians from crossing streets, providing space for arranging street lamps and sign boards, providing a working place for municipal construction and the like. As a part of urban roads, the design of the central separation strip is matched with a road section traffic organization and a traffic management control scheme based on the aspects of safety and smoothness;

at present, a pipeline buried underground in a central dividing zone on a road is usually too short in service life due to unreasonable arrangement of the pipeline, so that the normal use of various arrangements on the road is influenced, and therefore a central dividing zone pipeline laying structure is provided.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides the pipeline laying structure of the central separation belt, so that the structure of the central separation belt is more reasonable, the arrangement mode and the position of the pipeline are optimized, the service life of the pipeline is prolonged, and the maintenance frequency is reduced.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a central separator pipe laying structure, encapsulates the piece including gradation gravel subbase, anti-crack type cement stabilization gravel base course, asphalt concrete surface course, guardrail, gradation gravel layer, pitch sand seal and concrete, gradation gravel subbase top surface is provided with anti-crack type cement stabilization gravel base course, anti-crack type cement stabilization gravel base course top surface is provided with asphalt concrete surface course and gradation gravel layer, gradation gravel layer top surface is provided with the pitch sand seal, guardrail one end is run through asphalt sand seal, gradation gravel layer, anti-crack type cement stabilization gravel base course and gradation gravel layer and is located gradation gravel subbase bottom surface, the inside concrete encapsulation piece that is provided with of gradation gravel layer.

As a preferred technical scheme of the utility model, the concrete encapsulating block comprises a concrete encapsulating layer, a bundling pipe and a steel pipe, the steel pipe is arranged inside the concrete encapsulating block, the bundling pipe is arranged on the inner side of the steel pipe, and the concrete encapsulating layer is positioned on the outer side of the steel pipe.

As a preferred technical scheme of the utility model, the pipe orifice of the steel pipe is of a slope edge structure, and the steel pipe is connected with the steel pipe through a sleeve.

As a preferable technical scheme of the utility model, the outer side of the steel pipe is provided with asphalt-impregnated cloth, and the asphalt-impregnated cloth is provided with two layers.

As a preferable technical scheme of the utility model, the end surface of the bundling pipe is in a flat state, and the inner side of the bundling pipe is smooth.

As a preferable technical scheme of the utility model, the bundling tube is connected with the bundling tube through a sealing joint, and a rubber gasket is arranged at the joint of the bundling tube and the sealing joint.

Compared with the prior art, the utility model can achieve the following beneficial effects:

through the graded gravel subbase layer, the anti-crack cement stabilized gravel base layer, the asphalt concrete surface course, the guardrail, the graded gravel layer, the asphalt sand closed course and the concrete encapsulation block which are arranged, the structure of the central separation zone is more reasonable, the placing mode and the position of the pipeline are optimized, the service life of the pipeline is prolonged, and the maintenance frequency is reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is an enlarged schematic view of the concrete encapsulating block of the present invention;

FIG. 3 is a schematic structural view of four steel pipes arranged in the concrete encapsulating block of the present invention;

FIG. 4 is a schematic structural view of two steel pipes arranged in the concrete encapsulating block of the present invention;

wherein: 1. a graded gravel sub-base; 2. a crack resistant cement stabilized gravel base; 3. asphalt concrete surface course; 4. a guardrail; 5. grading a gravel layer; 6. a tar sand seal layer; 7. a concrete encapsulating block; 71. sealing the concrete layer; 72. a bundling tube; 73. and (5) steel pipes.

Detailed Description

The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Example (b):

as shown in fig. 1-4, a pipeline laying structure for a central separator comprises a graded gravel base layer 1, an anti-cracking cement stabilization gravel base layer 2, an asphalt concrete surface layer 3, a guardrail 4, a graded gravel layer 5, an asphalt sand sealing layer 6 and a concrete encapsulation block 7, wherein the anti-cracking cement stabilization gravel base layer 2 is arranged on the top end surface of the graded gravel base layer 1, the asphalt concrete surface layer 3 and the graded gravel layer 5 are arranged on the top end surface of the anti-cracking cement stabilization gravel base layer 2, the asphalt sand sealing layer 6 is arranged on the top end surface of the graded gravel layer 5, one end of the guardrail 4 penetrates through the asphalt sand sealing layer 6, the graded gravel layer 5, the anti-cracking cement stabilization gravel base layer 2 and the graded gravel base layer 1 and is located on the bottom end surface of the graded gravel base layer 1, and the concrete encapsulation block 7 is arranged inside the graded gravel base layer 1; the concrete encapsulating block 7 comprises a concrete sealing layer 71, a bundling pipe 72 and a steel pipe 73, the steel pipe 73 is arranged in the concrete encapsulating block 7, the bundling pipe 72 is arranged on the inner side of the steel pipe 73, and the concrete sealing layer 71 is positioned on the outer side of the steel pipe 73; the pipe orifice of the steel pipe 73 is of a slope edge structure, and the steel pipe 73 is connected with the steel pipe 73 through a sleeve; the outer side of the steel pipe 73 is provided with asphalt-impregnated cloth which is provided with two layers; the end surface of the bundling tube 72 is in a straight state, and the inner side of the bundling tube 72 is smooth; the bundling tube 72 is connected with the bundling tube 72 through a sealing joint, and a rubber gasket is arranged at the joint of the bundling tube 72 and the sealing joint;

1. transverse embedded pipe operation program

The construction protection → mechanical equipment, material approach → retest of the cross aisle position → excavator digs the steel pipe trench of the cross aisle, the manhole and the hand hole → constructor levels the trench bottom and the trench wall → lays the steel pipe of the cross aisle → the manhole and the hand hole are provided with templates, steel bar binding → steel pipe concrete encapsulation, the manhole and the hand hole are poured → self-checking, supervision engineer checking and signature confirmation are carried out to be qualified.

2. Longitudinal communication pipeline operation program

Setting construction protection → mechanical equipment, material approach → retesting the central position of the longitudinal communication pipeline → digging a machine digs the longitudinal communication pipeline trench → constructors level the trench bottom and trench wall → laying the longitudinal communication pipeline → communication pipeline concrete encapsulation → backfill tamping, removing residual soil, removing and recovering materials, tools and appliances → self-checking, inspecting by a supervision engineer and signing to confirm the qualification.

Technical requirements

Communication and power supply pipeline

Firstly, when the communication pipeline passes through the bridge, due to construction errors, the actual size and the design size of the central separation belt can deviate, and therefore, a construction unit needs to properly adjust the size of the bracket according to the field condition.

And secondly, the processing method of the window of the manhole for the pipeline to enter meets the requirements of design documents and GB 50374-2006, and avoids the phenomena of pipeline fracture and staggered joint caused by soil foundation subsidence in the future at the position of the window of the manhole for the pipeline to enter due to the fact that backfilling soil of the manhole foundation pit is not compacted.

Thirdly, laying steel pipes 73

1) And marking out the central line of each steel pipe 73 on the basis of the steel pipes 73, and paving pipes according to the central lines. When the pipes are laid, the lengths of the pipes are matched according to the length of the designed steel pipe 73, and joints between the pipes on the same layer and the pipes on the upper layer and the lower layer are staggered.

2) The steel pipes 73 are connected by adopting a sleeve, and the length of the sleeve is 2-3 times of the outer diameter of the steel pipes 73. Before the steel pipe 73 is connected, the pipe mouth should be rounded or filed into a slope edge to ensure smoothness and no edge.

3) The steel pipes 73 buried in the road are all encapsulated by C15 concrete for 5cm, and all the exposed steel pipes 73 are all wrapped by asphalt-dipped cloth for two-layer corrosion prevention.

4) The steel pipes 73 with different diameters are strictly forbidden to be used continuously, and the welding seams of the steel pipes 73 are upward when the steel pipes are embedded.

5) In order to avoid uneven spacing caused by rolling of the steel pipes 73, the steel pipes 73 can be clamped and stabilized by prefabricated wood blocks or concrete blocks, and then the concrete is poured and encapsulated and compacted.

6) After the steel pipe 73 is laid, trial opening is carried out, a steel wire with the diameter of 3mm is threaded, appropriate measures are taken to prevent the steel wire from retracting into the pipe, the pipe opening of the steel pipe 73 is blocked to prevent foreign matters from entering the pipe, marks are made at positions which are not easy to recognize, the embedded pipeline is convenient to search later, the steel pipe 73 embedded in the structure is tried to be opened firstly, then concrete is poured, and trial opening is also needed after the concrete pouring is finished to ensure that the communication pipeline is not blocked.

Fourthly, laying the bundling pipe 72

1) The connection of the bundling tube 72 adopts a special airtight joint provided by a material supplier, the butt joint end face of the bundling tube 72 is cut to be straight, and the inner and outer tube walls are ground to be flat, so that smoothness and no edge are ensured. During the connection, the rubber gaskets in the joint are correctly positioned, and the bundling tubes 72 are inserted into each half from both ends and then screwed tightly. The joints of the bundle tubes 72 should avoid being disposed in the recesses of the pipes.

2) The bundled tubes 72 are laid without being dragged over long distances to avoid damaging the pipes.

3) In order to increase the integrity of the pipeline group and prevent the pipes from twisting, winding and the like, the pipelines are tied by nylon ropes every 10m or so.

Fifthly, when the steel pipe 73 is obliquely inserted into the manhole, the steel pipe is cut into an inclined plane, the pipe orifice is parallel to the wall of the manhole and is retracted into the hole wall for a certain distance of 2-3 cm, the pipe orifice is smeared into a circular edge by cement mortar, and the end part entering the manhole is flared. The pipeline foundation enters the manhole window part, and the pipeline foundation is strictly carried out according to the relevant provisions of GB 50374-2006; when the bundling pipe 72 enters the manhole, the bundling pipe is directly passed without being cut off, and if the bundling pipe 72 is required to be cut off at the manhole, the bundling pipe 72 is required to be longer than 20cm of the manhole wall and is blocked by a special plug to prevent sundries from entering.

And sixthly, taking practical and effective protective measures for the communication pipeline until the communication pipeline is checked and accepted after the pipeline construction is finished, and preventing a construction vehicle or other equipment from damaging the communication pipeline due to the fact that the construction vehicle or other equipment passes through the central separation belt, wherein the communication pipeline is repaired if the communication pipeline is damaged. Except the bundling pipe 72 and the drainage pipe, steel wires with the diameter of 3mm are penetrated in all the other pipelines for cable drawing in the future. The steel wire should be fixed at both ends of the manhole to prevent the pipe from retracting; the structure of the central isolation belt is more reasonable, the placing mode and the placing position of the pipeline are optimized, the service life of the pipeline is prolonged, and the maintenance frequency is reduced.

Claims

1. The utility model provides a central authorities' separate zone pipe laying structure, includes gradation gravel subbase (1), anti-crack type cement stabilization gravel base (2), asphalt concrete surface course (3), guardrail (4), gradation gravel layer (5), asphalt sand seal coat (6) and concrete encapsulation piece (7), its characterized in that: gradation gravel subbase (1) top surface is provided with anti type cement stabilization gravel basic unit (2) of splitting, anti type cement stabilization gravel basic unit (2) top surface of splitting is provided with asphalt concrete surface course (3) and gradation gravel layer (5), gradation gravel layer (5) top surface is provided with asphalt sand seal (6), guardrail (4) one end is run through asphalt sand seal (6), gradation gravel layer (5), anti type cement stabilization gravel basic unit (2) of splitting and gradation gravel subbase (1) are located gradation gravel subbase (1) bottom surface, gradation gravel subbase (1) inside is provided with concrete package seal block (7).

2. A center separator pipelaying structure according to claim 1, wherein: the concrete encapsulation block (7) comprises a concrete encapsulation layer (71), a bundling pipe (72) and a steel pipe (73), the steel pipe (73) is arranged inside the concrete encapsulation block (7), the bundling pipe (72) is arranged on the inner side of the steel pipe (73), and the concrete encapsulation layer (71) is located on the outer side of the steel pipe (73).

3. A center separator pipelaying structure according to claim 2, wherein: the pipe orifice of the steel pipe (73) is of a slope edge structure, and the steel pipe (73) is connected with the steel pipe (73) through a sleeve.

4. A center separator pipelaying structure according to claim 2, wherein: and the outer side of the steel pipe (73) is provided with asphalt-impregnated cloth which is provided with two layers.

5. A center separator pipelaying structure according to claim 2, wherein: the end face of the bundling tube (72) is in a straight state, and the inner side of the bundling tube (72) is smooth.

6. A center separator pipelaying structure according to claim 2, wherein: the bundling tube (72) is connected with the bundling tube (72) through a sealing joint, and a rubber gasket is arranged at the joint of the bundling tube (72) and the sealing joint.