CN206503161U - A kind of full precast assembly steel concrete combination underground pipe gallery - Google Patents

Abstract

The utility model is a fully prefabricated assembled steel-concrete combined underground comprehensive pipe gallery. The pipe gallery includes several prefabricated sections and a post-tensioned cable system. The inner layer of the prefabricated section is a steel skeleton, and the middle layer is a steel plate layer. The outer layer is a concrete layer, the steel plate layer is provided with spliced steel plates, the steel skeleton is composed of hoop steel beams and longitudinal steel beams, and the longitudinal steel beams connect multiple hoop steel beams in the prefabricated section to form a Corridor-shaped whole, forming a steel skeleton in the form of space, the steel plates in the steel plate layer are fixed to the outer surfaces of the circumferential steel beams and the longitudinal steel beams, the concrete layer is provided with pre-bound longitudinal and transverse steel bars, and the concrete The cable channel and anchor end of the tensioned prestressed cable are reserved in the layer, and each prefabricated segment is placed on the cushion layer. The prestressed cable passes through the cable channel to tension the cable, and the prestressed cable is pulled The cable is anchored at the anchor end. The utility model has the advantages of light weight, fast construction, high degree of industrialization and the like.

Description

A fully prefabricated assembled steel-concrete composite underground comprehensive pipe gallery

technical field

The utility model belongs to the technical field of municipal facility construction, and in particular relates to a fully prefabricated assembled steel-concrete combined underground comprehensive pipe gallery.

Background technique

Urban underground pipelines refer to pipelines and ancillary facilities for water supply, drainage, gas, heat, electricity, communications, radio and television, industry, etc. within the city, and are important infrastructure and "lifelines" to ensure the operation of the city. In recent years, with the rapid development of cities, problems such as insufficient scale of underground pipeline construction and low management level have become prominent. In some cities, incidents such as heavy rain and waterlogging, pipeline leakage and explosion, and road subsidence have occurred one after another, which have seriously affected the safety of people's lives and property and the order of urban operation. . The underground comprehensive pipe gallery, also known as the common trench, refers to the public tunnels used for centralized laying of municipal pipelines such as electricity, communications, radio and television, water supply, drainage, heat, and gas underground in cities. Promoting its construction and coordinating the planning, construction and management of various municipal pipelines can solve problems such as repeated excavation of road surfaces, dense overhead line networks, and frequent pipeline accidents, which is conducive to ensuring urban safety, improving urban functions, beautifying urban landscapes, and promoting Intensive, efficient and transformational development of the city.

However, the cast-in-place underground comprehensive utility gallery has a long construction period, serious ground damage, and high noise and dust pollution, which greatly affects the urban environment and traffic. Prefabrication and assembly technology can realize the construction method of "factory processing of components and on-site assembly of structures", which greatly improves the construction quality and efficiency, and realizes green and energy-saving construction. Therefore, it has certain practical significance to introduce prefabricated assembly technology in the construction of underground comprehensive pipe gallery. Based on this, people have successively proposed an assembled underground pipe gallery with an upper arched prestressed structure (CN204491661U), a prefabricated wedge-shaped flexible interface assembled pipe gallery (CN204040062U), an assembled prefabricated bamboo composite pipe gallery (CN204940337U), a steel Structural urban comprehensive pipe gallery (CN204898721U), an assembled comprehensive pipe gallery that can be stretched in the body (CN204163108U) and other prefabricated underground comprehensive pipe gallery forms based on various materials.

However, the concrete prefabricated pipe gallery is heavy and inconvenient to assemble, and the waterproof and force bearing of the steel structure pipe gallery are relatively poor. Therefore, using the respective advantages of concrete and steel structures, designing an underground comprehensive pipe gallery with a steel-concrete hybrid structure system that is fully prefabricated in the factory and assembled on site can provide a new direction for the development of prefabricated pipe galleries.

Utility model content

The purpose of this utility model is to overcome the problems existing in the prior art, and provide a fully prefabricated assembled steel-concrete combined underground comprehensive pipe gallery, under the premise of ensuring the basic functions of the pipe gallery and partial prefabrication, comprehensively utilizing the respective advantages of steel and concrete materials, Overcome the shortcomings of the current concrete cast-in-place pipe gallery formwork project, slow construction progress, and large environmental impact, and overcome the shortcomings of full prefabricated concrete and partial prefabricated pipe gallery prefabrication procedures, heavy prefabricated components, and inconvenient transportation.

In order to achieve the above-mentioned technical purpose and achieve the above-mentioned technical effect, the utility model is realized through the following technical solutions:

A fully prefabricated assembled steel-concrete composite underground comprehensive pipe gallery, the pipe gallery includes several prefabricated sections and a post-tensioned cable system, the inner layer of the prefabricated section is a steel skeleton, the middle layer is a steel plate layer, and the outer layer is concrete layer, the steel plate layer is provided with spliced steel plates, the steel skeleton is composed of circumferential steel beams and longitudinal steel beams, and the longitudinal steel beams connect multiple circumferential steel beams in the prefabricated section into a corridor-like whole, A steel skeleton in the form of space is formed. The steel plates in the steel plate layer are fixed to the outer surfaces of the circumferential steel beams and the longitudinal steel beams. The concrete layer is provided with pre-bound longitudinal and transverse steel bars, and the concrete layer is reserved The cable tunnel and anchor end of the prestressed cable are stretched, each prefabricated segment is placed on the cushion, the prestressed cable passes through the cable tunnel to tension the cable, and the prestressed cable is anchored to the anchorage by the anchor end.

Further, the section of the pipe gallery is rectangular, circular, tubular arched or horseshoe-shaped with single or multiple warehouses.

Further, the post-tensioned cable system is composed of prestressed cables, cable tunnels, local stiffening plates, anchors and anchor ends, the cable tunnels are set inside the concrete layer, and the circumferential steel beams and longitudinal steel At the steel girder web of the beam, anchors are fixed on the prestressed cables, prestressed cables that are tensioned to generate prestress are arranged in the cable tunnels, and the prestressed cables in the cable tunnels pass through the anchors. The tool and the corresponding anchoring end are tensioned and fixed, and the prestressed cable is used to splice multiple prefabricated segments into a whole through the post-tensioning non-bonded prestressing method.

Further, waterproof rings are provided at the seams between the prefabricated segments.

Further, the local stiffening plates are arranged on both sides of the cable tunnels of the circumferential steel beam and the longitudinal steel beam.

Further, the ring steel beam is composed of a vertical ring beam and a horizontal ring beam, the vertical ring beam and the horizontal ring beam are connected by steel beam splicing nodes, and the steel beams of the vertical ring beam and the horizontal ring beam The section is I-shaped, H-shaped steel or steel truss beam structure.

Further, the steel beam splicing node is composed of high-strength bolts, end plates, stiffening plates, and local stiffening ribs, the horizontal ring beam is connected with the vertical ring beam through high-strength bolts and end plates, and the stiffening plate is set on At the angle between the horizontal ring beam and the vertical ring beam, the local stiffener is arranged in the vertical ring beam and corresponds to the lower flange of the horizontal ring beam.

Further, the steel plates in the steel plate layer are profiled steel plates or ordinary steel plates, and shear keys are fixed on the surface of the steel plates.

The beneficial effects of the utility model are:

The fully prefabricated assembled steel-concrete composite underground comprehensive pipe gallery of the utility model makes full use of the joint action of steel skeleton, steel plate and concrete, and reduces the total weight and The wall is thick and easy to transport; during prefabrication, the internal formwork is replaced by a system composed of steel beams and steel plates, and only the external formwork is required, which reduces the difficulty of production of prefabricated sections; the inner layer uses steel beams and steel plates, which facilitates the installation of internal pipe supports; The entire construction process has achieved full prefabrication and assembly, realizing the industrialized production of factory prefabrication and on-site assembly, shortening the construction period and reducing the impact of on-site construction on the surrounding environment.

Description of drawings

Fig. 1 is a schematic sectional structure diagram of the utility model pipe gallery;

Fig. 2 is the I-I profile of the pipe gallery of Fig. 1 of the utility model and a schematic diagram of segment splicing;

Fig. 3 is a schematic enlarged diagram of the upper corner node structure of the utility model Fig. 1 pipe gallery;

Fig. 4 is a schematic enlarged diagram of the structure of the lower corner node of the pipe gallery in Fig. 1 of the utility model;

Fig. 5 is a schematic diagram of the node structure of the post-tensioned cable system of the present invention;

Fig. 6 is a schematic diagram of the splicing node structure of the prefabricated segment of the present invention;

Fig. 7 is another embodiment of the present utility model.

Explanation of symbols in the figure: 1. Concrete layer, 2. Steel plate layer, 3. Ring steel beam, 31. Vertical ring beam, 32. Horizontal ring beam, 4. Longitudinal steel beam, 5. Cushion, 6. Steel beam Splicing joints, 61, high-strength bolts, 62, end plates, 63, stiffeners, 64, local stiffeners, 7, post-tensioned cable systems, 71, prestressed cables, 72, cable channels, 73, local stiffeners , 74, anchorage, 75, anchoring end.

detailed description

The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Referring to Figures 1 to 6, a fully prefabricated assembled steel-concrete composite underground comprehensive pipe gallery. The pipe gallery includes several prefabricated segments and a post-tensioned cable system. It is a steel plate layer 2, and the outer layer is a concrete layer 1. The steel plate layer 2 is provided with spliced steel plates. The steel skeleton is composed of a circumferential steel beam 3 and a longitudinal steel beam 4. The longitudinal steel beam 4 will be prefabricated. Multiple hoop steel beams 3 in the section are connected into a corridor-like whole to form a steel skeleton in the form of space. The steel plates in the steel plate layer 2 are fixed on the outer surfaces of the hoop steel beams 3 and the longitudinal steel beams 4. The concrete layer 1 There are pre-bound longitudinal and transverse steel bars in the center, and the cable tunnel 72 and the anchoring end 75 of the tensioned prestressed cable are reserved in the concrete layer 1, and each segment of the pipe gallery is placed on the cushion 5, and then Pass the prestressed cable 71 through the cable hole 72, tension the cable, and use the anchor 74 to anchor the prestressed cable 71 to the anchoring end 75.

The section of the pipe gallery is rectangular, circular, tubular arched or horseshoe-shaped with single or multiple warehouses.

The post-tensioning cable system 7 is composed of a prestressed cable 71, a cable tunnel 72, a local stiffening plate 73, an anchor 74 and an anchoring end 75, and the cable tunnel 72 is arranged inside the concrete layer 1, and the circumferential At the steel beam webs of the steel beam 3 and the longitudinal steel beam 4, the anchorage 74 is fixed on the prestressed cable 71, and the prestressed cable 71 that is prestressed by tension is arranged in the cable channel 72, The prestressed cable 71 in the cable channel 72 is stretched and fixed by the anchor 74 and the corresponding anchoring end 75, and the prestressed cable 71 splices a plurality of prefabricated segments into a whole by post-tensioning non-bonded prestressing method.

A waterproof ring 8 is provided at the seams between the prefabricated segments. In this embodiment, the waterproof ring 8 can be made of waterproof materials such as rubber rings or a waterproof structure.

The local stiffeners 73 are arranged on both sides of the cable tunnels 72 of the circumferential steel beam 3 and the longitudinal steel beam 4 .

The ring steel beam 3 is composed of a vertical ring beam 31 and a horizontal ring beam 32, the vertical ring beam 31 and the horizontal ring beam 32 are connected by a steel beam splicing node 6, the vertical ring beam 31 and the horizontal ring beam The steel beam section of the beam 32 is in the form of I-shaped steel, H-shaped steel or steel truss beam, which is used to improve the rigidity and bearing capacity of the steel beam and save materials.

The steel beam splicing node 6 is composed of high-strength bolts 61, end plates 62, stiffening plates 63, and local stiffening ribs 64. The horizontal ring beam 32 is connected with the vertical ring beam 31 through high-strength bolts 61 and end plates 62, The stiffening plate 63 is set at the angle between the horizontal ring beam 32 and the vertical ring beam 31 to improve the anti-rotation ability of the node and at the same time improve the stress on the corner of the pipe gallery. The local stiffening rib 64 is set at the vertical In the ring beam 31, and corresponding to the lower flange of the horizontal ring beam 32, it is used to bear the concentrated force transmitted by the flange and improve the stress distribution of the component at the node.

The steel plate in the steel plate layer 2 is a profiled steel plate or a common steel plate, and a shear key 9 is fixedly attached to the surface of the steel plate. In this embodiment, studs are welded on the surface of the steel plate as the shear key 9 .

Referring to Figure 7, it is a prefabricated section of the pipe gallery that changes the section form of the pipe gallery and uses ordinary steel plates instead of profiled steel plates.

Below in conjunction with technical scheme and accompanying drawing, describe the implementation steps of the present utility model in detail:

1) According to the size of each part of the designed pipe gallery, make steel beams, steel plates and other components. The vertical ring beam 31 and the horizontal ring beam 32 are spliced into the ring steel beam 3 through the steel beam splicing node 6, and the multiple ring steel beams 3 in the segment are spliced into a whole with the longitudinal steel beam 4 to form a space steel skeleton.

2) Install the profiled steel plate used in the steel plate layer 2 on the outer surfaces of the circumferential steel beam 3 and the longitudinal steel beam 4, and weld shear keys (bolts or other forms) on the outer surface of the profiled steel plate.

3) Put the whole composed of the hoop steel beam 3, the longitudinal steel beam 4 and the steel plate layer 2 into the mold, and put the steel mesh required in the concrete layer 1; then pour concrete, carry out curing, shape and have a certain After the bearing capacity is reached, the formwork is removed, and the maintenance is continued until it has full bearing capacity, and then it is transported to the site according to the planned time.

4) Pour the cushion layer 5 in the excavated and treated foundation pit, place the prefabricated pipe gallery segment on its upper part, and set the waterproof ring 8 at the joint of the two prefabricated segments; pass the prestressed cable 71 through The cable tunnel is prestressed and anchored with anchors 74 to protect the node positions of the post-tensioned cable system.

5) Follow the method of 4) to construct section by section or multiple sections until the construction of the entire pipe gallery is completed.

Principle of the utility model

The inner circumferential steel beam 3 and the longitudinal steel beam 4 of the utility model pipe gallery, the middle steel plate layer 2 and the outer concrete layer 1 jointly bear the external load transmitted from the soil, and the space skeleton formed by the steel beam provides the pipe gallery Larger rigidity, the joint action of steel beams, steel plates and concrete provides a higher bearing capacity for the pipe gallery, the pipe gallery is divided into multiple sections and prefabricated in the factory, and then post-tensioned and unbonded prestressed at the construction site technology to splice multiple prefabricated segments into a whole.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (8)

1. A fully prefabricated assembled steel-concrete composite underground comprehensive pipe gallery, characterized in that the pipe gallery comprises several prefabricated segments and post-tensioned cable systems (7), the inner layer of the prefabricated segment is a steel skeleton, the middle The layer is a steel plate layer (2), the outer layer is a concrete layer (1), the steel plate layer (2) is provided with spliced steel plates, and the steel skeleton is composed of hoop steel beams (3) and longitudinal steel beams (4) Composition, the longitudinal steel beam (4) connects the multiple hoop steel beams (3) in the prefabricated segment into a corridor-like whole, forming a steel skeleton in the form of space, and the steel plates in the steel plate layer (2) are fixed on the hoop The outer surfaces of steel beams (3) and longitudinal steel beams (4), the concrete layer (1) is provided with pre-bound longitudinal and transverse steel bars, and the concrete layer (1) is reserved for tension and prestressed tension The cable tunnel (72) and the anchoring end (75) of the cable, each prefabricated segment is placed on the cushion (5), and the prestressed cable (71) passes through the cable tunnel (72) to tension the cable, and passes through The anchor (74) anchors the prestressed cable (71) to the anchor end (75). 2. The fully prefabricated assembled steel-concrete composite underground comprehensive pipe gallery according to claim 1, characterized in that the section of the pipe gallery is rectangular, circular, tubular arched or horseshoe-shaped with single or multiple warehouses. 3. The fully prefabricated assembled steel-concrete composite underground comprehensive pipe gallery according to claim 1, characterized in that, the post-tensioned cable system (7) consists of prestressed cables (71), cable tunnels (72), local stiffening plate (73), anchorage (74) and anchoring end (75), the cable channel (72) is set inside the concrete layer (1), and the ring steel beam (3) and the longitudinal steel beam ( 4) at the web of the steel beam, the anchorage (74) is fixed on the prestressed cable (71), and the prestressed cable (71 ), the prestressed cable (71) in the cable channel (72) is tensioned and fixed by the anchor (74) and the corresponding anchor end (75), and the prestressed cable (71) is post-tensioned without bonding prestressing method Join multiple prefabricated segments into a whole. 4. The fully prefabricated assembled steel-concrete composite underground comprehensive pipe gallery according to claim 3, characterized in that a waterproof ring (8) is provided at the joint between the prefabricated segments. 5. The fully prefabricated assembled steel-concrete composite underground comprehensive pipe gallery according to claim 3, characterized in that, the local stiffening plate (73) is arranged on the tension between the hoop steel beam (3) and the longitudinal steel beam (4). Cable hole road (72) both sides. 6. The fully prefabricated assembled steel-concrete composite underground comprehensive pipe gallery according to claim 1 or 3, characterized in that, the ring steel beam (3) is composed of a vertical ring beam (31) and a horizontal ring beam (32) The vertical ring beam (31) and the horizontal ring beam (32) are connected by steel beam splicing nodes (6), and the steel beam sections of the vertical ring beam (31) and the horizontal ring beam (32) are engineering The structural form of girder, H-shaped steel or steel truss beam. 7. The fully prefabricated assembled steel-concrete composite underground comprehensive pipe gallery according to claim 6, characterized in that, the steel beam splicing node (6) is composed of high-strength bolts (61), end plates (62), stiffening plates (63 ), local stiffeners (64), the horizontal ring beam (32) is connected to the vertical ring beam (31) through high-strength bolts (61) and end plates (62), and the stiffener (63) is set At the angle between the horizontal ring beam (32) and the vertical ring beam (31), the local stiffener (64) is arranged in the vertical ring beam (31), and connected to the lower flange of the horizontal ring beam (32) correspond. 8. The fully prefabricated assembled steel-concrete combined underground comprehensive pipe gallery according to claim 1, characterized in that the steel plate in the steel plate layer (2) is a profiled steel plate or a common steel plate, and a shearing plate is fixed on the surface of the steel plate key (9).