CN108086356A - A kind of prefabricated assembled tube-in-tube waterproof pipe gallery and installation method - Google Patents

Abstract

The invention discloses a prefabricated pipe-in-pipe waterproof comprehensive pipe gallery and an installation method thereof, including an outer pipe and a waterproof concrete inner pipe; the installation method includes: 1. placing a waterproof concrete support inside the outer pipe, The contact surface between the seat and the waterproof concrete inner pipe is paved with an elastic cushion; 2. The outer wall of the inner pipe is paved with a sealed waterproof membrane, and then the inner pipe is hoisted to the support inside the outer pipe; 3. The support is exposed Lay waterproof membranes on the two curved surfaces of the external space and overlap the waterproof membranes on the outer wall of the waterproof concrete inner pipe, and then place the elastic backing plate at the center of the top of the waterproof concrete inner pipe; 4. On the U of the outer pipe Lay an elastic cushion on the contact surface between the bottom plate and the waterproof concrete top plate; 5. Cover the top plate of the outer tube on the waterproof concrete U-shaped bottom plate of the outer tube, drill bolt holes at the corresponding positions of the bottom plate and the top plate, and pass through the waterproof concrete backing plate The connection of the bolts is used to fix the contact gap between the top plate and the bottom plate.

Description

A prefabricated pipe-in-pipe waterproof comprehensive pipe gallery and its installation method

technical field

The invention relates to the field of underground comprehensive pipe gallery, in particular to a prefabricated pipe-in-pipe waterproof comprehensive pipe gallery and an installation method thereof.

Background technique

Underground comprehensive utility tunnel (called "common ditch" in Japan) refers to a public tunnel excavated underground in a city, which includes municipal pipelines such as electricity, communications, radio and television, water supply, drainage, heat and gas, and is set up for maintenance at the same time Ports, hoisting ports, monitoring and alarm systems, and waterproof and drainage systems, implement unified planning, unified design, unified management and unified construction.

The traditional way of waterproofing the exterior of the underground comprehensive pipe gallery project is to lay waterproof membranes or spray waterproof materials on the concrete structure. If one part is damaged, leakage will occur, which will lead to the failure of the waterproof system of the entire project and cannot achieve Expected waterproof effect. Nowadays, the waterproofing method of comprehensive pipe gallery is mostly to adopt the composite method of anti-seepage self-waterproof concrete and waterproof layer. However, in the case of underground engineering leakage in recent years, there are still many water leakages caused by this method, which leads to the collapse of the waterproofing system. Did not achieve the expected waterproof effect.

At present, the cross-sections of the underground comprehensive utility gallery are all in the form of a single tube, resulting in only one line of defense for the self-waterproofing of the structure, which is prone to water leakage. At the same time, when water leakage occurs, it will bring difficulties to maintenance and reinforcement, and greatly shorten the service life and durability of the pipe gallery.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a prefabricated pipe-in-pipe waterproof comprehensive pipe gallery and its installation method, which has a simple structure, a wide range of material sources, easy operation, better waterproof effect, and can play the role of self-waterproof structure. function, to ensure the expected 100-year service life and durability of the underground utility tunnel.

The present invention is achieved through the following technical solutions:

A prefabricated pipe-in-pipe waterproof comprehensive pipe gallery, including an outer pipe and a waterproof concrete inner pipe; the inside of the outer pipe and the outside of the waterproof concrete inner pipe form a closed space isolation area; the outer pipe and the waterproof concrete inner pipe are composed of prefabricated pipe joints Assembled;

The outside of the bottom of the waterproof concrete inner pipe is fixed inside the outer pipe through a waterproof concrete support; a groove for longitudinal drainage is formed between the waterproof concrete support and the inner wall of the outer pipe.

Preferably, the outer wall of the waterproof concrete inner pipe and the waterproof concrete support are used to form the surface of the groove with sealed waterproof membranes respectively, and the width of the overlapping part of the two waterproof membranes is 40-50cm.

Preferably, the outer tube includes a waterproof concrete top plate and a waterproof concrete U-shaped bottom plate that are fastened up and down to form a rectangular structure.

Further, the outer side of the bottom of the waterproof concrete inner pipe is fixed on the waterproof concrete U-shaped bottom plate through the waterproof concrete support, and an elastic backing plate is arranged between the waterproof concrete top plate and the top of the waterproof concrete inner pipe.

Furthermore, a number of waterproof concrete backing plates are covered outside the joint between the waterproof concrete U-shaped bottom plate and the waterproof concrete top plate, and the bolts pass through the corresponding waterproof concrete backing plates and are fixedly connected to the corresponding waterproof concrete U-shaped bottom plate or waterproof concrete top plate.

Further, the joints between the waterproof concrete U-shaped bottom plate and the waterproof concrete top plate are arranged in a broken line, and an elastic cushion is laid on the contact surface.

Preferably, an elastic cushion is provided on the contact surface between the waterproof concrete inner pipe and the waterproof concrete support.

Further, the elastic pad adopts polyether polyurethane elastic pad.

Preferably, the corners of the waterproof concrete inner pipe adopt an arc-shaped structure, and the top is an arched structure. The bottom of the waterproof concrete inner pipe is fixed to the inner bottom of the outer pipe by three waterproof concrete supports respectively arranged at the corner and the middle.

A method for installing a prefabricated pipe-in-pipe waterproof comprehensive pipe gallery, comprising the following steps:

Step 1, placing the waterproof concrete support inside the outer pipe, and laying an elastic cushion on the contact surface between the waterproof concrete support and the waterproof concrete inner pipe;

Step 2, laying a sealed waterproof membrane on the outer wall of the waterproof concrete inner pipe, and then lifting the waterproof concrete inner pipe to the waterproof concrete support in the outer pipe;

Step 3: Lay waterproof membranes on the two curved surfaces of the waterproof concrete support exposed to the external space and overlap the waterproof membranes on the outer wall of the waterproof concrete inner pipe, and then place the elastic backing plate on the top of the waterproof concrete inner pipe central position;

Step 4, paving an elastic cushion on the contact surface of the waterproof concrete U-shaped bottom plate of the outer pipe and the waterproof concrete top plate;

Step 5, cover the waterproof concrete top plate of the outer tube on the waterproof concrete U-shaped bottom plate of the outer tube, drill bolt holes at the corresponding positions of the bottom plate and the top plate, and fix the contact gap between the top plate and the bottom plate with bolts through the connection of the waterproof concrete backing plate.

Compared with the prior art, the present invention has the following beneficial technical effects:

The waterproof concrete components adopted in the present invention are all prefabricated, assembled and assembled on site, easy to install, simple to manufacture, greatly improved the efficiency of the construction process, and controllable construction quality. The present invention consists of three structural self-waterproof defense lines of the outer pipe, the central space isolation area and the inner pipe, which can well block the groundwater outside the inner pipe, truly play the role of structural self-waterproof, and can ensure the expected performance of the underground comprehensive pipe gallery. Hundred-year lifespan and durability. Even if the groundwater breaks through the first line of defense of the outer pipe, the groove formed by the angle between the bottom support of the waterproof concrete and the outer pipe will allow the water to flow away and be discharged, and the water will not have direct contact with the inner pipe, so it can completely block the water in the inner pipe. In addition to the pipes, the service life and durability of the comprehensive pipe gallery are greatly improved, and the structural self-waterproof effect is truly achieved. At the same time, when moisture penetrates through the first line of defense of the outer tube, it can be repaired and reinforced in time. Even if it cannot be repaired and reinforced in time, the collapse of the first line of defense will have no adverse effect on the second and third lines of defense at all, and the underground utility tunnel can operate as usual.

Further, the waterproof concrete U-shaped backing plate of the outer pipe and the waterproof concrete top plate are connected by bolts, which is convenient for installation and disassembly.

Further, the contact gap between the waterproof concrete U-shaped backing plate of the outer pipe and the waterproof concrete top plate, and the contact gap between the waterproof concrete support and the inner pipe and the outer pipe are all provided with a polyether polyurethane elastic cushion, which can pass through in case of moisture. The water-absorbing expansion increases the contact stress and plays a waterproof role.

Further, the elastic backing plate on the inner side of the top of the outer tube and the outer side of the top of the inner tube can increase the stability of the inner tube, so that the inner tube and the outer tube can coordinate deformation under the pressure of the upper soil, so that the outer tube and the inner tube can work together bear the upper load.

Furthermore, the top of the inner pipe is arched. Even if leakage occurs at the top of the outer pipe, the water will flow to the groove formed by the angle between the bottom support of the waterproof concrete and the outer pipe along with the waterproof membrane on the outer surface of the inner pipe. Make the inner tube waterproof impeccable.

Description of drawings

Fig. 1 is a cross-sectional view of the assembled pipe-in-pipe waterproof comprehensive pipe gallery of the present invention.

FIG. 2 is an enlarged plan view of area A in FIG. 1 .

FIG. 3 is an enlarged left view of area A in FIG. 1 .

FIG. 4 is an enlarged plan view of area B in FIG. 1 .

In the figure, 1 is a waterproof concrete top plate, 2 is an elastic backing plate, 3 is a waterproof concrete U-shaped bottom plate, 4 is a waterproof concrete inner pipe, 5 is a waterproof concrete support, 6 is an elastic cushion, and 7 is a waterproof concrete backing plate. 8 is a bolt, and 9 is a waterproof membrane.

Detailed ways

The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

The invention discloses a prefabricated pipe-in-pipe waterproof integrated pipe gallery and an installation method, which adopts a self-waterproof structure and solves the problems of single outsourcing waterproofing and inconvenient maintenance and reinforcement.

It includes three lines of defense: the outer pipe, the waterproof concrete inner pipe 4 and the space isolation area in the middle. It is assembled from many prefabricated pipe joints. The outer pipe is composed of a waterproof concrete U-shaped bottom plate 3 and a waterproof concrete top plate 1, which are connected by bolts 8. The waterproof concrete inner pipe 4 is set on the waterproof concrete support 5, and the waterproof concrete support 5 and the waterproof concrete inner pipe 4 are provided with an elastic cushion 6, and an elastic backing plate 2 is arranged between the waterproof concrete top plate 1 and the waterproof concrete inner pipe 4.

Wherein, the outer pipe adopts a rectangular structure, the bottom corner of the waterproof concrete inner pipe 4 adopts an arc structure, and the top of the waterproof concrete inner pipe 4 adopts an arched structure. The three waterproof concrete supports 5 are respectively supported from the corner of the bottom and the center of the bottom.

The waterproof concrete includes but is not limited to ordinary waterproof concrete, admixture waterproof concrete, fiber crack-resistant waterproof concrete, high-performance waterproof concrete and polymer cement waterproof concrete.

Wherein the elastic cushion layer 6 includes but not limited to polyether polyurethane elastic cushion layer.

The waterproof membrane 9 includes but not limited to CPS new waterproof membrane, polyester tire SBS modified bitumen waterproof membrane and polyvinyl chloride waterproof membrane.

A method for installing a prefabricated pipe-in-pipe waterproof comprehensive pipe gallery of the present invention comprises the following steps:

1. Place the three waterproof concrete supports 5 of the integrated pipe gallery inside the outer pipe, and lay a polyether polyurethane elastic cushion on the contact surface between the waterproof concrete supports 5 and the waterproof concrete inner pipe 4 .

2. Lay the sealed CPS waterproof membrane 9 on the outer wall of the waterproof concrete inner pipe 4 of the comprehensive pipe gallery, and then hoist the waterproof concrete inner pipe 4 to the waterproof concrete support 5 in the outer pipe.

3. At this time, spread the CPS waterproof membrane 9 on the two curved surfaces of the waterproof concrete support 5 exposed to the external space, and then place the elastic backing plate 2 in the middle of the top of the waterproof concrete inner tube 4 .

4. Lay the polyether polyurethane elastic cushion layer 6 on the contact surface between the waterproof concrete U-shaped bottom plate 3 of the outer tube and the waterproof concrete top plate 1, and then cover the waterproof concrete top plate 1 of the outer tube to the waterproof concrete U-shaped bottom plate 3 of the outer tube Above, drill 8 holes for bolts at the corresponding positions of the bottom plate and the top plate, and use bolts 8 to fix the contact gap between the top plate and the bottom plate.

Specifically, as shown in FIG. 1 , an assembled pipe-in-pipe waterproof integrated pipe gallery includes an outer pipe, a central space isolation area, a waterproof concrete inner pipe 4 , a waterproof concrete support 5 and an elastic backing plate 2 . The outer tube is composed of a waterproof concrete U-shaped bottom plate 3 and a waterproof concrete top plate 1, and the waterproof concrete inner tube 4 is made of waterproof concrete; the waterproof concrete inner tube 4 is respectively fixed on the outer tube by three waterproof concrete supports 5 arranged at the corners and the middle. Inside, the end faces of both ends of the waterproof concrete support 5 are arranged in an arc shape, and the waterproof concrete support 5 at the corner is arranged at a right angle. It forms a groove with the inner wall of the outer pipe, which can carry out longitudinal drainage. The waterproof concrete support 5 in the middle is arranged in a plate shape, and the arc surface at one end forms a concave shape with the lower end arc surface of the waterproof concrete support 5 at the corner on the same side and the inner wall of the outer pipe. Grooves, the other end of which forms corresponding grooves, wherein the waterproof concrete support 5 in the middle can be provided with n pieces, so that n+1 horizontal grooves can be formed between the bottom of the waterproof concrete inner pipe 4 and the bottom of the outer pipe.

As shown in Figure 2 and Figure 3, the outer pipe is composed of a waterproof concrete U-shaped bottom plate 3 and a waterproof concrete top plate 1, and an elastic cushion 6 is provided in the contact gap, and 8 bolt holes are drilled on the corresponding parts on both sides of the contact gap, and fixed with 8 bolts , at the joint between the waterproof concrete U-shaped bottom plate 3 and the waterproof concrete top plate 1, a number of waterproof concrete backing plates 7 corresponding to the bolts 8 are provided, and cooperate with the bolts 8 as the connectors of the two.

As shown in Figure 4, the polyether polyurethane elastic cushion layer 6 is paved on the contact surface of the waterproof concrete support 5 and the waterproof concrete inner pipe 4, and the waterproof coiled material 9 and the waterproof concrete inner pipe are laid on the surface of the waterproof concrete support 5. 4 The overlapping part should extend 40-50cm.

Claims (10)

1. A prefabricated pipe-in-pipe waterproof comprehensive pipe gallery, characterized in that it includes an outer pipe and a waterproof concrete inner pipe (4); the inside of the outer pipe and the outside of the waterproof concrete inner pipe (4) form a closed space isolation area; Both the outer pipe and the waterproof concrete inner pipe (4) are assembled by prefabricated pipe joints; The outside of the bottom of the waterproof concrete inner pipe (4) is fixed inside the outer pipe through a waterproof concrete support (5); grooves for longitudinal drainage are formed between the waterproof concrete support (5) and the inner wall of the outer pipe. 2. A prefabricated pipe-in-pipe waterproof comprehensive pipe gallery according to claim 1, characterized in that the outer wall of the waterproof concrete inner pipe (4) and the waterproof concrete support (5) are used to form grooves on the surface The sealed waterproof rolls (9) are paved respectively, and the width of the overlapping part of the two parts of the waterproof rolls (9) is 40-50 cm. 3. A prefabricated pipe-in-pipe waterproof comprehensive pipe gallery according to claim 1, characterized in that the outer pipe includes a waterproof concrete top plate (1) and a waterproof concrete U-shaped bottom plate (3) that are fastened up and down to form a rectangular structure ). 4. A prefabricated pipe-in-pipe waterproof comprehensive pipe gallery according to claim 3, characterized in that the outer side of the bottom of the waterproof concrete inner pipe (4) is fixed on the waterproof concrete U-shaped through the waterproof concrete support (5) On the bottom plate (3), an elastic backing plate (2) is arranged between the waterproof concrete top plate (1) and the top of the waterproof concrete inner pipe (4). 5. A prefabricated pipe-in-pipe waterproof integrated pipe gallery according to claim 3, characterized in that, there are several joints covering the joints of the waterproof concrete U-shaped bottom plate (3) and the waterproof concrete top plate (1). The waterproof concrete backing plate (7), the bolt (8) passes through the corresponding waterproof concrete backing plate (7) and is fixedly connected with the corresponding waterproof concrete U-shaped bottom plate (3) or waterproof concrete top plate (1). 6. A prefabricated pipe-in-pipe waterproof integrated pipe gallery according to claim 5, characterized in that the joints between the waterproof concrete U-shaped bottom plate (3) and the waterproof concrete top plate (1) are arranged in a broken line, and the joint An elastic cushion (6) is laid on the surface. 7. A prefabricated pipe-in-pipe waterproof comprehensive pipe gallery according to claim 1, characterized in that an elastic cushion is provided on the contact surface between the waterproof concrete inner pipe (4) and the waterproof concrete support (5) (6). 8. A prefabricated pipe-in-pipe waterproof comprehensive pipe gallery according to claim 6 or 7, characterized in that the elastic cushion (6) is a polyether polyurethane elastic cushion. 9. A prefabricated pipe-in-pipe waterproof comprehensive pipe gallery according to claim 1, characterized in that the corners of the waterproof concrete inner pipe (4) adopt an arc-shaped structure, the top is an arched structure, and the waterproof concrete inner pipe (4) The bottom is fixed to the inner bottom of the outer tube through three waterproof concrete supports (5) respectively arranged at the corner and the middle. 10. A method for installing a prefabricated pipe-in-pipe waterproof integrated pipe gallery, characterized in that it comprises the following steps: Step 1, placing the waterproof concrete support (5) inside the outer pipe, and laying an elastic cushion (6) on the contact surface between the waterproof concrete support (5) and the waterproof concrete inner pipe (4); Step 2, laying a sealed waterproof membrane (9) on the outer wall of the waterproof concrete inner pipe (4), and then hoisting the waterproof concrete inner pipe (4) onto the waterproof concrete support (5) in the outer pipe; Step 3, laying waterproof membranes (9) on the two curved surfaces of the waterproof concrete support (5) exposed to the external space and overlapping the waterproof membranes (9) on the outer wall of the waterproof concrete inner pipe (4), Then place the elastic backing plate (2) in the center of the top of the waterproof concrete inner pipe (4); Step 4, laying an elastic cushion (6) on the contact surface between the waterproof concrete U-shaped bottom plate (3) of the outer pipe and the waterproof concrete top plate (1); Step 5, cover the waterproof concrete top plate (1) of the outer tube on the waterproof concrete U-shaped bottom plate (3) of the outer tube, drill holes for bolts (8) at the corresponding positions of the bottom plate and the top plate, and pass the waterproof concrete backing plate (7) The connecting bolts (8) are used to fix the contact gap between the top plate and the bottom plate.