Deep manhole structure

Abstract

The utility model discloses a deep inspection well structure, which belongs to the technical field of inspection wells and comprises a cushion layer. The well body prefabricated section is arranged on the cushion layer, and the well body prefabricated section is connected with the connecting pipeline; the well body cast-in-place section is arranged at the upper end of the well body prefabricated section, and the horizontal section of the well body cast-in-place section corresponds to the horizontal section of the well body prefabricated section. The well body prefabricated section is arranged on the cushion layer, the well body cast-in-place section is arranged at the upper end of the well body prefabricated section, according to the foundation pit depth and underground water level information, segmented prefabrication is conducted on a box type structure of the overhaul well in a prefabrication site, then hoisting equipment is used for hoisting the well body prefabricated section to the cushion layer, and finally the well body cast-in-place section is poured. Therefore, a complete overhaul well structure is formed, time needed by field wet operation is effectively shortened, high cost caused by complex anti-seepage measures is avoided, and investment of an engineering field in the aspect of anti-seepage is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of maintenance well technology, and in particular to a deep maintenance well structure. Background Technology

[0002] Inspection wells are structures designed to facilitate the maintenance and installation of underground infrastructure such as power supply, water supply, drainage, sewage, communications, cable TV, gas pipes, and street light lines in cities. They are generally located at pipe junctions, bends, changes in pipe diameter or slope, and at regular intervals on straight pipe sections to facilitate the periodic inspection of ancillary structures.

[0003] In the municipal sector, water supply and drainage manholes are small in size and often buried at a great depth, usually below the groundwater level. Therefore, in water-rich areas, the construction of water supply and drainage manholes often requires the construction of retaining structures. These structures must not only meet the stress requirements of the foundation pit but also the seepage prevention requirements, in order to meet the dry construction requirements of on-site pouring of the manholes. Compared to the structure of the manhole itself, the cost of these temporary retaining measures is usually higher. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a deep inspection well structure, which can reduce the investment in seepage prevention in engineering, shorten the construction period, and improve the economic benefits of the project.

[0005] The deep inspection well structure according to an embodiment of the present utility model includes a bedding layer; a precast well section, which is disposed on the bedding layer and connected to a connecting pipeline; and a cast-in-place well section, which is disposed above the precast well section, and the horizontal cross-section of the cast-in-place well section corresponds to the horizontal cross-section of the precast well section.

[0006] The deep inspection well structure according to the embodiments of this utility model has at least the following beneficial effects: the prefabricated well body section is set on the foundation layer, and the cast-in-place well body section is set on the upper end of the prefabricated well body section. According to the pit depth and groundwater level information, the box structure of the inspection well is prefabricated in sections at the prefabrication site. Then, the prefabricated well body section is hoisted onto the foundation layer using hoisting equipment. Finally, the cast-in-place well body section is poured to form a complete inspection well structure. This effectively reduces the time required for on-site wet operations and avoids high costs caused by complex anti-seepage measures, thereby greatly reducing the investment in anti-seepage at the project site.

[0007] According to some embodiments of the present invention, the prefabricated section of the well body includes: a first prefabricated section disposed on a cushion layer; a plurality of second prefabricated sections stacked sequentially on the first prefabricated section, the second prefabricated sections corresponding to the first prefabricated sections; and a connecting structure, wherein the second prefabricated sections are connected to adjacent first prefabricated sections through the connecting structure, and the second prefabricated sections are connected to adjacent second prefabricated sections through the connecting structure.

[0008] According to some embodiments of the present invention, the connecting structure is embedded in the second prefabricated section.

[0009] According to some embodiments of the present invention, a first precast section is provided with a first water-stop structure. A part of the first water-stop structure is embedded in the connection structure between the first precast section and the second precast section, and another part of the first water-stop structure is embedded in the first precast section. The first water-stop structure is used to seal the gap between the first precast section and the second precast section.

[0010] According to some embodiments of the present invention, a second water-stop structure is embedded in a portion of the second prefabricated section. A portion of the second water-stop structure is embedded in the connecting structure between two adjacent second prefabricated sections, and another portion of the second water-stop structure is embedded in the second prefabricated section located at the lower end. The second water-stop structure is used to seal the gap between two adjacent second prefabricated sections.

[0011] According to some embodiments of this utility model, the connecting structure is a fine aggregate concrete post-pouring strip.

[0012] According to some embodiments of this utility model, the water-stopping structure is a rubber water-stopping strip.

[0013] According to some embodiments of this utility model, a well opening is provided at the upper end of the cast-in-place section of the well body, and a well cover is provided at the upper end of the well opening. The well cover is detachably connected to the cast-in-place section of the well body.

[0014] According to some embodiments of this utility model, the first prefabricated section is buried below the construction water level.

[0015] According to some embodiments of this utility model, the top of the second prefabricated section is buried at a height higher than the construction water level.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a schematic diagram of the deep inspection and repair well structure according to an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0020] Figure label:

[0021] Subbase 100;

[0022] 200 prefabricated section of well body, 210 first prefabricated section, 220 second prefabricated section, 230 connecting structure, 240 first water-stopping structure, 250 second water-stopping structure;

[0023] 300mm cast-in-place section of well body;

[0024] The manhole opening is 400mm and the manhole cover is 410mm. Detailed Implementation

[0025] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the description mentions "first" or "second," it is merely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or the sequential relationship between indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] refer to Figures 1 to 2 Describes the structure of a deep inspection and repair well according to an embodiment of the present utility model.

[0030] like Figures 1 to 2 As shown, the deep inspection well structure includes a foundation layer 100; a precast well section 200, which is placed on the foundation layer 100 and connected to the connecting pipeline; and a cast-in-place well section 300, which is placed above the precast well section 200, with the horizontal cross-section of the cast-in-place well section 300 corresponding to the horizontal cross-section of the precast well section 200.

[0031] like Figure 1 As shown, the prefabricated section 200 of the well body is set on the foundation layer 100, and the cast-in-place section 300 of the well body is set on the upper end of the prefabricated section 200. According to the foundation pit depth and groundwater level information, the box structure of the maintenance well is prefabricated in sections at the prefabrication site. Then, the prefabricated section 200 of the well body is hoisted onto the foundation layer 100 using hoisting equipment. Finally, the cast-in-place section 300 of the well body is poured to form a complete maintenance well structure. This effectively reduces the time required for wet work on site and avoids high costs caused by complex anti-seepage measures, thereby greatly reducing the investment in anti-seepage on the project site.

[0032] In some specific embodiments of this utility model, the prefabricated section 200 of the well body includes: a first prefabricated section 210, which is disposed on the pad layer 100; a plurality of second prefabricated sections 220, which are stacked sequentially on the first prefabricated section 210, and the second prefabricated sections 220 correspond to the first prefabricated sections 210; and a connecting structure 230, through which the second prefabricated sections 220 are connected to adjacent first prefabricated sections 210, and the second prefabricated sections 220 are connected to adjacent second prefabricated sections 220.

[0033] like Figure 1 As shown, the first precast section 210 is disposed on the upper end of the subbase 100, and several second precast sections 220 are assembled sequentially from bottom to top above the first precast section 210. Adjacent second precast sections 220 are connected by a connecting structure 230, and the first precast section 210 and the second precast section 220 are also connected by a connecting structure 230. Specifically, the connecting structure 230 is a fine aggregate concrete post-cast strip, and the connecting structure 230 is embedded in the inner wall of the second precast section 220 in the horizontal direction.

[0034] In some specific embodiments of this utility model, a first prefabricated section 210 is provided with a first water-stop structure 240. A part of the first water-stop structure 240 is embedded in the connecting structure 230 between the first prefabricated section 210 and the second prefabricated section 220, and another part of the first water-stop structure 240 is embedded in the first prefabricated section 210. The first water-stop structure 240 is used to seal the gap between the first prefabricated section 210 and the second prefabricated section 220.

[0035] In some specific embodiments of this utility model, a second water-stop structure 250 is embedded in a portion of the second prefabricated section 220. A portion of the second water-stop structure 250 is embedded in the connecting structure 230 between two adjacent second prefabricated sections 220, and another portion of the second water-stop structure 250 is embedded in the second prefabricated section 220 located at the lower end. The second water-stop structure 250 is used to seal the gap between two adjacent second prefabricated sections 220.

[0036] Specifically, such as Figure 2As shown, a first pre-embedded section is vertically embedded with a first water-stop structure 240. The lower end of the first water-stop structure 240 is embedded on the first precast section 210, and the upper end is embedded in the post-cast strip between the first precast section 210 and the second precast section 220. It should be noted that when there is only one second precast section 220, the upper end of the second precast section 220 is directly connected to the cast-in-place section 300 of the well body. Therefore, in this case, the upper end of the second precast section 220 does not need to be embedded with a second water-stop structure 250. However, when there are multiple second precast sections 220, in two adjacent second precast sections 220, the upper end of the lower second precast section 220 needs to be embedded with a second water-stop structure 250. The lower end of the second water-stop structure 250 is embedded on the lower second precast section 220, and the upper end of the second water-stop structure 250 is embedded in the post-cast strip between the two adjacent second precast sections 220. This allows for different structural layouts and connection methods, making the entire structure simpler and more rational. It also ensures a smooth connection with the 300mm cast-in-place section of the well body, guaranteeing the sealing of the connections between precast sections in the complex structure. This enables the maintenance well structure to meet good waterproofing and structural stability requirements for different numbers of precast sections.

[0037] In some specific embodiments of this utility model, the water-stopping structure is a rubber water-stopping strip.

[0038] In some specific embodiments of this utility model, a well opening 400 is provided at the upper end of the cast-in-place section 300 of the well body, and a well cover 410 is provided at the upper end of the well opening 400. The well cover 410 is detachably connected to the cast-in-place section 300 of the well body.

[0039] In some specific embodiments of this utility model, the first prefabricated section 210 is buried below the construction water level.

[0040] In some specific embodiments of this utility model, the top of the second prefabricated section 220 is buried at a height higher than the construction water level.

[0041] like Figures 1 to 2 As shown, the underwater construction method of this deep inspection well structure will be specifically illustrated below with a concrete implementation example. Figure 1 In the table, H1 is the excavation elevation of the foundation pit, H2 is the top elevation of the 100mm subbase, H3 is the groundwater level elevation, H4 is the top elevation of the cast-in-place section, and H5 is the design elevation of the top of the inspection well.

[0042] In the construction of a deep inspection well in a water-rich area near the coast, a detailed geological and hydrological survey was first conducted on site. The area has a high groundwater level and the soil layer is silty sand with a certain degree of permeability. Based on the survey results, a slope excavation method was adopted for seepage prevention and support operations, with the slope determined to be 1:1.5. A sump well was also installed for drainage. Excavators were used to excavate the foundation pit working face according to the designed excavation depth and scope, while monitoring the groundwater level and soil stability simultaneously.

[0043] After the excavation of the foundation pit working face is completed, underwater concrete is poured as the foundation layer 100 for the inspection well. The mix ratio of the underwater concrete is cement:sand:stone:water:admixture = 1:2:3:0.5:0.02, ensuring that the foundation layer 100 has a strength of C30 and a permeability grade of P8.

[0044] The groundwater level was determined to be +2.0m at the high end and -1.0m at the low end, with an average level of +0.5m calculated. Based on this average level information, the box-type structure of the inspection well was divided into a first precast section 210 and two second precast sections 220. During the precasting process, a 150mm × 150mm post-cast strip groove was cut into the inner wall of the lower end of the second precast section 220, and a rubber waterstop was pre-embedded at the upper end of the first precast section 210. Rubber waterstops were also pre-embedded at the upper ends of the middle sections of the second precast sections 220.

[0045] The first precast section 210 is hoisted onto the foundation layer 100 using a crane, and then two second precast sections 220 are hoisted onto the first precast section 210 in sequence. The dimensions and weights of the first and second precast sections 210 and 220 are determined according to the design requirements, and the lifting capacity and working radius of the crane meet the hoisting requirements.

[0046] After hoisting is completed, the top of the second precast section 220 at the top is above the groundwater level. The pouring of the extension section is carried out on the top of the second precast section 220. Specifically, ordinary concrete with a strength grade of C35 is used, and the conventional operation of formwork erection, rebar binding, concrete pouring and curing is followed until the design elevation is reached.

[0047] Water was pumped out from the interior of the first precast section 210 and the second precast section 220. The reinforcing bars were tied with binding wire, and wooden formwork was installed as the formwork for the post-pouring strip. C40 micro-expansion concrete was poured, and the vibration time was 30 seconds. The concrete was covered with plastic film for curing for 28 days. The formwork was removed when the concrete strength reached the design strength.

[0048] Finally, after connecting the first precast section 210 to the corresponding connecting pipe 10, the foundation pit is symmetrically backfilled with sand, with a layer thickness of 300mm, and compacted with a road roller to complete the entire construction process.

[0049] By implementing seepage prevention support operations based on on-site geological and hydrological conditions and adopting a reasonable excavation plan, the problem of groundwater leakage in the coastal water-rich area was effectively solved, ensuring the stability and safety of the foundation pit working face and avoiding construction accidents and structural damage caused by groundwater issues. Furthermore, the use of segmented prefabrication facilitated the manufacturing, transportation, and hoisting of prefabricated sections, improving construction efficiency and operability. Simultaneously, the installation of waterstops and post-cast strip grooves on the prefabricated sections enhanced the waterproofing and integrity of the structure, ensuring the long-term performance of the inspection well. This not only guaranteed construction quality and efficiency but also significantly reduced the overall investment on-site.

[0050] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A deep well access structure, characterized by, The utility model relates to a well body prefabricated section (200) and a well body cast-in-place section (300) are arranged on the cushion layer (100), and the well body cast-in-place section (300) is arranged on the upper end of the well body prefabricated section (200), and the horizontal section of the well body cast-in-place section (300) and the horizontal section of the well body prefabricated section (200) correspond to each other. The utility model relates to a well body prefabricated section (200) and a well body cast-in-place section (300) are arranged on the cushion layer (100), and the well body cast-in-place section (300) is arranged on the upper end of the well body prefabricated section (200), and the horizontal section of the well body cast-in-place section (300) and the horizontal section of the well body prefabricated section (200) correspond to each other. The utility model relates to a well body prefabricated section (200) and a well body cast-in-place section (300) are arranged on the cushion layer (100), and the well body cast-in-place section (300) is arranged on the upper end of the well body prefabricated section (200), and the horizontal section of the well body cast-in-place section (300) and the horizontal section of the well body prefabricated section (200) correspond to each other. The utility model relates to a well body prefabricated section (200) and a well body cast-in-place section (300) are arranged on the cushion layer (100), and the well body cast-in-place section (300) is arranged on the upper end of the well body prefabricated section (200), and the horizontal section of the well body cast-in-place section (300) and the horizontal section of the well body prefabricated section (200) correspond to each other.

2. The deep inspection well structure of claim 1, wherein, The utility model relates to a well body prefabricated section (200) and a well body cast-in-place section (300) are arranged on the cushion layer (100), and the well body cast-in-place section (300) is arranged on the upper end of the well body prefabricated section (200), and the horizontal section of the well body cast-in-place section (300) and the horizontal section of the well body prefabricated section (200) correspond to each other. The utility model relates to a well body prefabricated section (200) and a well body cast-in-place section (300) are arranged on the cushion layer (100), and the well body cast-in-place section (300) is arranged on the upper end of the well body prefabricated section (200), and the horizontal section of the well body cast-in-place section (300) and the horizontal section of the well body prefabricated section (200) correspond to each other. The utility model relates to a well body prefabricated section (200) and a well body cast-in-place section (300) are arranged on the cushion layer (100), and the well body cast-in-place section (300) is arranged on the upper end of the well body prefabricated section (200), and the horizontal section of the well body cast-in-place section (300) and the horizontal section of the well body prefabricated section (200) correspond to each other. The utility model relates to a well body prefabricated section (200) and a well body cast-in-place section (300) are arranged on the cushion layer (100), and the well body cast-in-place section (300) is arranged on the upper end of the well body prefabricated section (200), and the horizontal section of the well body cast-in-place section (300) and the horizontal section of the well body prefabricated section (200) correspond to each other.

3. The deep inspection well structure of claim 2, wherein, The utility model relates to a well body prefabricated section (200) and a well body cast-in-place section (300) are arranged on the cushion layer (100), and the well body cast-in-place section (300) is arranged on the upper end of the well body prefabricated section (200), and the horizontal section of the well body cast-in-place section (300) and the horizontal section of the well body prefabricated section (200) correspond to each other.

4. The deepwell structure according to claim 2, wherein The utility model relates to a well body prefabricated section (200) and a well body cast-in-place section (300) are arranged on the cushion layer (100), and the well body cast-in-place section (300) is arranged on the upper end of the well body prefabricated section (200), and the horizontal section of the well body cast-in-place section (300) and the horizontal section of the well body prefabricated section (200) correspond to each other.

5. The deep inspection well structure of claim 4, wherein, The utility model relates to a well body prefabricated section (200) and a well body cast-in-place section (300) are arranged on the cushion layer (100), and the well body cast-in-place section (300) is arranged on the upper end of the well body prefabricated section (200), and the horizontal section of the well body cast-in-place section (300) and the horizontal section of the well body prefabricated section (200) correspond to each other.

6. The deepwell well structure according to claim 2, wherein ​ 7. The deepwell well structure according to claim 4, wherein ​ 8. The deepwell structure according to claim 6, wherein ​ 9. The deepwell well structure according to claim 2, wherein ​ 10. The deepwell well structure according to claim 4, wherein ​

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