Sealing device and sealing structure of assembled UHPC large rain sewage inspection well pipeline

Abstract

The utility model discloses a sealing device and a sealing structure of an assembly type UHPC large rain sewage inspection well pipeline, and the sealing device comprises a UHPC ring, an annular longitudinal bar, a stirrup and a sealing part, the UHPC ring is constructed to be of an annular structure, the connecting end face of the annular structure is matched with the shape of the outer wall of an inspection well body at the joint of the inspection well and a pipeline, the inner annular face of the annular structure is matched with the shape of the outer wall of the pipeline, the annular longitudinal bars distributed at intervals are arranged in the UHPC ring in the annular direction, and the annular longitudinal bars are bound through the stirrups distributed at intervals. During site construction, the waterproof sealing parts are arranged between the connecting end face of the UHPC ring and the outer wall of the well body of the inspection well and between the inner ring face of the UHPC ring and the outer wall of the pipeline. According to the utility model, the leakage problem of the connection of the UHPC inspection well and the pipeline is solved, and rain sewage is prevented from leaking into soil to cause pollution.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated buildings, and particularly relates to a pipeline sealing device and a sealing structure for a prefabricated UHPC large rainwater and sewage inspection well. Background Art

[0002] In today's society, the scale of urban construction is getting larger and larger, urban construction facilities are getting more and more perfect, people's requirements for urban facilities are getting higher and higher, and municipal facilities are playing an increasingly important role in urban construction. As a part of municipal engineering, the urban drainage pipe network is the artery of the city. In order to ensure the normal operation of the city and the normal life of residents, it is necessary to regularly inspect and maintain drainage pipes and related facilities. The function of setting drainage inspection wells is to facilitate and ensure the safety of pipeline maintenance. Therefore, the specification requires that drainage inspection wells be set at a certain distance. Drainage inspection wells are generally arranged on urban roads and are constructed synchronously with road construction. Therefore, the occurrence of inspection well diseases directly affects the driving safety of roads and the roadbed and pavement of roads. With the increasing importance of urban traffic in the city, the problems of inspection well diseases affecting driving safety and residents' lives have attracted wide attention from society. Preventing inspection well diseases from the source and curing existing drainage inspection well diseases have become important issues in road construction.

[0003] Due to factors such as the influence of road width and other pipelines, most drainage pipes are arranged under the carriageway. The inspection wells on the carriageway and their surrounding areas are weak parts of the road and are extremely easy to be damaged under the impact of vehicle loads, such as the sinking of the well surface, the protrusion of the well surface, the fragmentation of the asphalt layer around the well ring, the leakage of the well chamber, and being hollowed out under the action of water flow and passing vehicles. These diseases directly affect the use of urban roads, affect urban aesthetics and driving safety, affect the quality of life of urban residents, and increase the road maintenance and pipeline maintenance costs brought about by this.

[0004] The failure rate, inspection and maintenance frequency, and cost of drainage pipes are much higher than those of other types of pipes. Inspection wells often have various forms of diseases such as unstable, damaged, sunken manhole covers, cracked well seats, and subsidence. The main reasons for the sinking of inspection wells are the settlement of the entire well body caused by soft geology and foundation settlement, as well as the loosening or breaking of the mortar layer between the cover plate and the well body. Prefabricated circular ultra-high performance concrete (UHPC) large rainwater and sewage inspection wells can fundamentally solve the problems of inspection well sinking and its subsequent problems, and are an excellent type of large rainwater and sewage inspection wells.

[0005] Existing drainage pipes are mostly made of concrete or steel, and the pipes themselves are heavy. Pipe settlement can cause the inspection well body to bear a large bending moment internal force. If the inspection well is an ordinary concrete inspection well with a relatively large wall thickness, the well body can completely bear this part of the internal force without additional devices. At this time, there is no leakage problem in the connection between the pipe and the inspection well body, and the connection between the well body and the pipe can be ensured to be dense by pouring waterproof materials such as sealing mortar. However, due to the relatively thin wall thickness of the UHPC prefabricated inspection well and the large number of assembly joints, the integrity of the well body is relatively poor, and its own bending bearing capacity is insufficient. The connection tightness between the pipe and the well body is lower than that between the conventional concrete inspection well body and the pipe, and leakage of rain and sewage is likely to occur at the connection between the UHPC inspection well and the pipe. Summary of the Invention

[0006] One of the purposes of the present invention is to provide a pipe sealing device for an assembled UHPC large rain and sewage inspection well, which solves the leakage problem of the connection between the UHPC inspection well and the pipe and ensures that rain and sewage do not leak into the soil to cause pollution.

[0007] One of the purposes of the present invention is achieved by adopting the following technical solutions:

[0008] A pipe sealing device for an assembled UHPC large rain and sewage inspection well, the sealing device includes a UHPC ring, annular longitudinal bars, stirrups and a sealing component. The UHPC ring is constructed as an annular structure with a connection end face matching the outer wall shape of the inspection well body at the connection between the inspection well and the pipe and an inner ring face matching the outer wall shape of the pipe. A plurality of annular longitudinal bars are arranged along the circumferential direction inside the UHPC ring, and the plurality of annular longitudinal bars are tied by a number of stirrups distributed at intervals. During on-site construction, waterproof sealing components are arranged between the connection end face of the UHPC ring and the outer wall of the inspection well body and between the inner ring face of the UHPC ring and the outer wall of the pipe.

[0009] The sealing device of the present invention can be prefabricated, is easy to manufacture, and has a low cost. It is applicable to the connection between the circular assembled UHPC inspection well body with a pipe diameter greater than 3m and the pipe, and can effectively solve the sealing problem of the connection between the drainage pipe and the UHPC inspection well body caused by the relatively thin wall of the large assembled UHPC rain and sewage inspection well, and improve the construction quality of the pipe and the inspection well without reducing the construction speed and construction difficulty.

[0010] The present invention also has the following preferred designs:

[0011] Four annular longitudinal bars are arranged inside the UHPC ring of the present invention, and the four annular longitudinal bars are symmetrically distributed along the center line of the UHPC ring.

[0012] The annular longitudinal reinforcement of the present utility model is formed by bending straight steel bars into circular steel bars, and the lap length of the circular steel bars is 20 cm.

[0013] The center distance between adjacent annular longitudinal reinforcements of the present utility model is 140 mm.

[0014] The stirrups of the present utility model are formed by enclosing 6-mm steel bars into a closed square shape, and the stirrup spacing is 200 mm.

[0015] The inner ring surface diameter of the UHPC ring of the present utility model is 20 mm larger than the outer wall diameter of the pipeline at the connection between the inspection well and the pipeline.

[0016] The UHPC ring of the present utility model is an annular structure cast with ultra-high performance concrete with a compressive strength greater than 130 MPa and a tensile strength greater than 7 MPa.

[0017] The second object of the present utility model is to provide an assembled UHPC large rain and sewage inspection well pipeline sealing structure, which includes a connected UHPC inspection well and a pipeline, and also includes the sealing device of the above-mentioned assembled UHPC large rain and sewage inspection well pipeline. The lower edge of the UHPC ring of the sealing device is placed above the outer edge of the well seat of the UHPC inspection well. The self-weight of the UHPC ring is directly transmitted to the lower concrete cushion through the base of the inspection well.

[0018] The present utility model has the following beneficial effects:

[0019] 1. The present utility model solves the leakage problem at the connection between the large UHPC inspection well and the pipeline, ensuring that rain and sewage do not leak into the soil and cause pollution.

[0020] 2. The sealing device of the present utility model is an assembled component, which can be prefabricated and produced in the factory and installed and constructed on site, and the product quality is guaranteed.

[0021] 3. The main materials of the sealing device of the present utility model are steel bars and UHPC, which can make full use of the tensile and compressive properties of the UHPC material, as well as the excellent durability and anti-cracking ability of the UHPC. The ultra-high impermeability and ultra-high wear resistance of the UHPC material are very beneficial to the anti-cracking and structural durability of the interface between the inspection well body and the pipeline, greatly improving the structural service life of the large inspection well itself.

[0022] 4. The sealing device of the present utility model uses UHPC material, which has strong corrosion resistance and can effectively resist the erosion of common chemical corrosives in drainage pipelines.

[0023] 5. The sealing device of the utility model is light in weight, and has low requirements for on-site transportation and hoisting construction machinery. The prefabricated construction process is not affected by weather and can be constructed all-weather. Moreover, the construction process is simple, the installation and assembly are fast, and the on-site construction speed is faster than that of the conventional large inspection wells cast with concrete.

[0024] 6. In the sealing structure of the utility model, the lower edge of the UHPC ring is placed above the outer edge of the UHPC inspection well base, and the self-weight of the UHPC ring is directly transmitted to the lower concrete cushion through the base of the inspection well, improving the reliability of the sealing structure.

[0025] In short, the large prefabricated circular ultra-high performance concrete rain and sewage inspection well pipe prefabricated sealing device is a low-carbon and environmentally friendly, convenient for construction, cost-effective, and can effectively solve the connection and sealing problem between the well body of the large prefabricated circular ultra-high performance concrete rain and sewage inspection well and the drainage pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a sectional view of a UHPC inspection well in the embodiment;

[0027] Figure 2 is a sectional view of a prefabricated UHPC inspection well pipe sealing structure in the embodiment;

[0028] Figure 3 is a detailed sectional view of a prefabricated UHPC inspection well pipe sealing structure in the embodiment;

[0029] Figure 4 is Figure 3 an enlarged view of part A of

[0030] Description of the reference numerals in the drawings:

[0031] 1 - inspection well, 11 - pipe connection hole, 2 - pipe, 3 - sealing device, 31 - UHPC ring, 32 - annular longitudinal reinforcement, 33 - stirrup, 34 - sealing member, 4 - backfilled sand, 5 - expansive cement mortar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will combine the drawings and embodiments to detail the technical solutions of the present utility model, so that those of ordinary skill in the art can better understand and implement the technical solutions of the present utility model.

[0033] As Figures 1 to 4 shown, a prefabricated UHPC large rain and sewage inspection well pipe sealing structure includes a connected UHPC inspection well 1, a pipe 2, and a sealing device 3. The lower edge of the UHPC ring 31 of the sealing device 3 is placed above the outer edge of the well seat of the UHPC inspection well 1. The self-weight of the UHPC ring is directly transmitted to the lower concrete cushion through the base of the inspection well 1.

[0034] Among them, the sealing device 3 includes a UHPC ring 31, circumferential longitudinal bars 32, stirrups 33 and a sealing component 34. The UHPC ring 31 is configured as an annular structure whose connecting end face matches the shape of the outer wall of the shaft body of the inspection well 1 at the connection between the connecting end face and the inspection well 1 and the pipeline 2, and whose inner ring face matches the shape of the outer wall of the pipeline 2. A plurality of circumferentially arranged and spaced annular longitudinal bars 32 are provided inside the UHPC ring 31, and the plurality of annular longitudinal bars 32 are tied by a number of spaced stirrups 33. During on-site construction, a waterproof sealing component 34 is provided between the connecting end face of the UHPC ring 31 and the outer wall of the shaft body of the inspection well 1, and between the inner ring face of the UHPC ring 31 and the outer wall of the pipeline 2.

[0035] As a preferred embodiment, four annular longitudinal bars 32 are provided inside the UHPC ring 31, and the four annular longitudinal bars 32 are symmetrically distributed about the center line of the UHPC ring 31.

[0036] As a preferred embodiment, the annular longitudinal bars 32 are formed into circular ring-shaped steel bars by bending straight steel bars, and the lap length of the circular ring-shaped steel bars is 20 cm, and the diameter of the steel bars used for the annular longitudinal bars 32 is 12 cm.

[0037] As a preferred embodiment, the center distance between adjacent annular longitudinal bars 32 is 140 mm.

[0038] As a preferred embodiment, the stirrups 33 are enclosed by 6-mm steel bars into a closed square shape, and the spacing of the stirrups 33 is 200 mm.

[0039] As a preferred embodiment, the inner ring face diameter of the UHPC ring 31 is 20 mm larger than the outer wall diameter of the pipeline 2 at the connection between the inspection well 1 and the pipeline 2.

[0040] As a preferred embodiment, the UHPC ring 31 is an annular structure cast from ultra-high performance concrete with a compressive strength greater than 130 MPa and a tensile strength greater than 7 MPa.

[0041] For the sealing device 3 of the present utility model, its annular longitudinal bars 32, stirrups 33 and UHPC ring 31 are produced and cast into shape in a prefabrication factory. During on-site splicing construction of the inspection well 1 and the pipeline 2, the pipeline joint is installed in the pipeline connection hole 11 of the inspection well 1, and the sealing device 3 is sleeved outside the pipeline 2. A waterproof sealing material can be applied between the connecting end face of the UHPC ring 31 of the sealing device 3 and the well wall of the shaft body of the inspection well 1, and between the inner ring face of the UHPC ring 31 and the outer wall of the pipeline 2 to form the sealing component 34. At the same time, at the connection between the pipeline joint and the inspection well 1, expansive cement mortar 5 is filled circumferentially. After the inspection well 1, the pipeline 2 and the sealing device 3 are spliced, backfill sand 4 is filled in the periphery.

[0042] The above embodiments are only the preferred embodiments of the present utility model, but they cannot be used as a limitation to the utility model. Any variations and improvements made based on the concept of the present utility model shall fall within the protection scope of the present utility model. The specific protection scope shall be subject to the claims.

Claims

1. A sealing device for assembled UHPC large-scale rainwater and sewage inspection well pipes, characterized by: The sealing device includes a UHPC ring, annular longitudinal reinforcements, stirrups and a sealing component. The UHPC ring is constructed into an annular structure whose connecting end face matches the shape of the outer wall of the inspection well body at the connection between the inspection well and the pipeline, and whose inner annular face matches the shape of the outer wall of the pipeline. A plurality of annular longitudinal reinforcements distributed at intervals are arranged in the annular direction inside the UHPC ring, and the plurality of annular longitudinal reinforcements are bound by a plurality of stirrups distributed at intervals. During on-site construction, a waterproof sealing component is arranged between the connecting end face of the UHPC ring and the outer wall of the inspection well body, and between the inner annular face of the UHPC ring and the outer wall of the pipeline.

2. The sealing device for the assembled UHPC large-scale rainwater and sewage inspection well pipe according to claim 1 is characterized in that: Four annular longitudinal ribs are arranged inside the UHPC ring, and the four annular longitudinal ribs are symmetrically distributed along the center line of the UHPC ring.

3. The sealing device for the assembled UHPC large-scale rainwater and sewage inspection well pipe according to claim 2 is characterized in that: The annular longitudinal reinforcement is formed by bending straight steel bars into circular ring-shaped steel bars, and the overlapping length of the circular ring-shaped steel bars is 20 cm.

4. The sealing device for the assembled UHPC large-scale rainwater and sewage inspection well pipe according to claim 3 is characterized by: The center distance between adjacent annular longitudinal ribs is 140 mm.

5. The sealing device for the assembled UHPC large-scale rainwater and sewage inspection well pipe according to claim 2 is characterized in that: The stirrups are enclosed by 6mm steel bars into a closed square, and the stirrup spacing is 200mm.

6. The sealing device for the assembled UHPC large-scale rainwater and sewage inspection well pipe according to claim 1 is characterized by: The inner ring surface diameter of the UHPC ring is 20 mm larger than the outer wall diameter of the pipeline at the connection between the inspection well and the pipeline.

7. The sealing device for the assembled UHPC large-scale rainwater and sewage inspection well pipe according to claim 1 is characterized by: The UHPC ring is an annular structure cast with ultra-high performance concrete having a compressive strength greater than 130 MPa and a tensile strength greater than 7 MPa.

8. An assembled UHPC large-scale rainwater and sewage inspection well pipe sealing structure, comprising a connected UHPC inspection well and a pipeline, characterized in that: It also includes a sealing device for an assembled UHPC large-scale rainwater and sewage inspection well pipe as described in any one of claims 1 to 7, wherein the lower edge of the UHPC ring of the sealing device is placed above the outer edge of the well seat of the UHPC inspection well.

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