Fabricated concrete well structure

Abstract

The utility model provides an assembly type concrete well structure which comprises a well base, a plurality of vertical pipe sections and a cover plate which are sequentially arranged from bottom to top in the axial direction, and first rabbets and second rabbets which are matched with each other are arranged between the well base and the vertical pipe sections, among the vertical pipe sections and between the vertical pipe sections and the cover plate. The first tongue-and-groove is formed in the top of the component located at the bottom, the second tongue-and-groove is formed in the bottom of the component located at the top, the second tongue-and-groove is spliced on the first tongue-and-groove, and a sealing rubber strip is arranged between the first tongue-and-groove and the second tongue-and-groove to seal the splicing portion of the concrete well. The rabbets are designed at the joints of the prefabricated well base, the multiple vertical pipe sections and the cover plate, the sealing rubber strips are arranged at the bent positions or the sunken positions of the rabbets, the concrete well is sealed, the sealing performance of the joints of the rabbets is effectively guaranteed, and the problem of leakage of the prefabricated manhole well is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled concrete structures, in particular to an assembled concrete well structure. Background Art

[0002] In engineering construction, traditional concrete manholes are generally cast in place, excavated directly at the construction site, and then cast on site. This construction method has high requirements for the construction site and construction period. When the construction site is limited, the construction period is tight, and the project volume is large, the above method cannot meet the construction needs. There are also some prefabricated manholes in the current market, but in subsequent use, there is a widespread problem of leakage at the splicing parts, which affects the use of the manholes. Utility Model Content

[0003] In order to solve the problem that prefabricated concrete wells in the prior art are prone to leakage during use, the utility model provides a prefabricated concrete well structure, including a well base, a plurality of riser segments and a cover plate which are arranged in sequence along the axial direction from bottom to top, and matching first and second tongues and grooves are arranged between the well base and the riser segments, between the plurality of riser segments, and between the riser segments and the cover plates, the first tongue and groove are arranged at the top of the component located at the bottom, the second tongue and groove are arranged at the bottom of the component located at the top, the second tongue and groove are spliced ​​on the first tongue and groove, and a sealing strip is arranged between the first tongue and the second tongue and groove to seal the splicing part of the concrete well.

[0004] Specifically, the tongue and groove is a single tongue and groove, and the sealing strip is arranged at the bending part of the first tongue and groove.

[0005] Specifically, the tongue and groove are double tongue and groove, the middle part of the first tongue and groove is concave downward, and the sealing strip (7) is arranged at the concave part of the first tongue and groove.

[0006] Specifically, the tongue and groove form a certain angle with the horizontal direction, and the angle is 100°±5°.

[0007] Specifically, the bottom of the sealing strip is coated with adhesive.

[0008] Specifically, the well base, multiple riser segments and the top section of the cover plate are pre-embedded with lifting rings.

[0009] Specifically, ladders are provided on the inner wall of the well base and the riser segment.

[0010] Specifically, a pipeline is arranged on the side wall of the well base or the riser segment.

[0011] Steel bars are provided in the well base, riser segments and cover plates.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model provides an assembled concrete well structure, in which a tongue-and-groove is designed at the connection between the prefabricated well base, multiple riser segments and a cover plate, and a sealing strip is arranged at the bend or depression of the tongue-and-groove to seal the concrete well, effectively ensuring the sealing of the tongue-and-groove connection, and solving the problem of leakage of the prefabricated manhole well.

[0014] 2. The utility model has a lifting ring embedded in the top cross section of the component to facilitate the lifting of the component. After the lifting is completed, the lifting ring is cut and epoxy paint is applied to the cut surface of the lifting ring. The lifting ring is located on the inner side of the well wall, which effectively avoids the problem of rust on the exposed part of the lifting ring.

[0015] 3. Tongue and groove connections are used at the joints, and the tongue and groove form a certain angle with the horizontal plane to facilitate positioning and guiding during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of a single tongue and groove structure;

[0018] Figure 3 It is a schematic diagram of the double tongue and groove structure.

[0019] Description of the drawings: 1. Well base; 2. Riser segment; 3. Cover plate; 4. Pipeline; 5. First tongue and groove; 6. Second tongue and groove; 7. Sealing strip; 8. Ladder; 9. Well cover. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solution of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-Figure 3 As shown, an assembled concrete well structure includes a prefabricated well base 1, a riser segment 2 and a cover plate 3. Multiple riser segments 2 are connected end to end and installed on the well base 1. The cover plate 3 is installed on the top of the riser segment 2. The number of riser segments 2 can be selected according to the height of the concrete well. Steel bars are arranged in the well base 1, the riser segment 2 and the cover plate 3. The components are prefabricated by pouring concrete in a fixed steel formwork at one time and vibrating to form, so as to ensure the uniformity of the size and specification of the components and reduce assembly deviation.

[0022] Tongues and grooves are provided at the connection of the components, including the connection between the well base 1 and the riser segment 2, between multiple riser segments 2, and between the riser segment 2 and the cover plate 3, all of which are provided with matching tongues and grooves. A first tongue and groove 5 is provided at the top of the component located at the bottom, and a second tongue and groove 6 is provided at the bottom of the component located at the top. The shapes of the first tongue and groove 5 and the second tongue and groove 6 match each other, and the second tongue and groove 6 is spliced ​​on the first tongue and groove 5 to fix the two components. The first tongue and groove 5 and the second tongue and groove 6 can be selected to use a single tongue and groove or a double tongue and groove according to the wall thickness. If the concrete well wall thickness is thin, a single tongue and groove should be used, and if the concrete well wall thickness is thick, a double tongue and groove should be used. In order to facilitate positioning and guiding during installation, the tongue and groove form a certain angle with the horizontal direction, and the angle is preferably 100°±5°.

[0023] Between the first tongue and groove 5 and the second tongue and groove 6, the concrete well is sealed and connected by a sealing strip 7, and the sealing strip 7 is made of waterproof and anti-aging material. When the tongue and groove adopts a single tongue and groove, the sealing strip 7 is arranged at the bend of the first tongue and groove 5 to seal the connection; when the tongue and groove adopts a double tongue and groove, the middle part of the first tongue and groove 5 is recessed downward, and a sealing strip 7 is arranged in the recessed part of the first tongue and groove 5. The first tongue and groove 5 and the second tongue and groove 6 press the sealing strip 7 at the connection to seal the connection and avoid leakage. The sealing strip 7 is arranged at a corner or a recessed part. When the first tongue and groove 5 and the second tongue and groove 6 are closed, the position of the strip is prevented from being offset to ensure the sealing effect. Furthermore, an adhesive can be coated on the bottom of the sealing strip 7 to properly fix the position of the sealing strip 7 to prevent the strip from being displaced when the second tongue and groove 6 are connected, thereby further enhancing the sealing effect of the tongue and groove.

[0024] A through hole is provided in the cover plate 3, and the outer frame of the manhole cover 9 is pre-buried outside the through hole. A pipe 4 is provided on the side wall of the well base 1 or the riser segment 2. The location of the pipe 4 can be selected according to the function of the well. For example, if the well is a water storage well, the pipe 4 is provided in the riser segment 2; if the well is a drainage well, the pipe 4 is provided in the well base 1. The connection form between the pipe 4 and the well can be selected according to the type, specification, waterproof grade requirements, etc. of the connected pipe 4, and connection modes such as the embedded sleeve type, the embedded gasket type, and the mortar plugging type can be selected. The embedded sleeve type embeds the socket of the socket-type pipe 4 in the concrete well wall, and the external pipe 4 is connected to the manhole well by a socket-type connection; the mortar plugging type first inserts the pipe 4 into the manhole well, and then uses waterproof mortar to plug it, or supports the formwork and grouts to plug it, and then cuts off the excess pipe 4 inserted into the well.

[0025] In order to facilitate the lifting and installation of the well base 1, the riser segment 2 and the cover plate 3, a lifting ring is embedded in the top section. After the components are installed in place, the lifting ring is cut off with a cutting machine. Since the lifting ring is located on the inner side of the well wall, the problem of rust on the exposed part of the lifting ring is effectively avoided. Furthermore, epoxy paint is applied to the cut surface of the lifting ring to further prevent the steel bars located at the cross section from rusting. A ladder 8 is provided on the inner wall of the well base 1 and the riser segment 2 to facilitate personnel to inspect the concrete well. The ladder 8 can be embedded in the component when the component is prefabricated, or it can be implanted in the concrete after the casting is completed. Reinforcement ribs are added around embedded parts such as lifting rings, ladders 8, well covers 9, embedded casings, etc. to ensure that the concrete around the opening or stress concentration point does not crack.

[0026] The concrete well was constructed by the following steps:

[0027] 1. Prefabrication of assembled concrete components:

[0028] (1) Do a good job of controlling the axis when installing the standard steel formwork. Before starting construction, first verify whether the specifications and dimensions of the standard steel formwork meet the requirements, and try to assemble the adjacent component formwork; focus on positioning and laying out the second tongue and groove 6 and the connection between the pipeline 4 and the manhole to ensure that subsequent components can be smoothly spliced;

[0029] (2) During the processing and installation of steel bars, the thickness of the steel bar protective layer should be properly controlled, especially at the tongue and groove part. Since the cross-sectional size of the tongue and groove part is small, it is easy to expose the steel bar, so it should be focused on during the installation of the steel bars;

[0030] (3) Fabrication and installation of embedded parts. While properly positioning the embedded parts in space, add reinforcement ribs around the embedded parts. The addition of reinforcement ribs needs to meet the requirements of the specification to ensure that the concrete around the opening or the stress concentration point does not crack. Embedded parts include embedded casing, lifting rings, ladders 8, manhole covers 9, etc.;

[0031] (4) Install the steel formwork and control the installation dimensions;

[0032] (5) Concrete pouring should ensure that the quality of raw materials is well controlled and the concrete is vibrated and compacted. The curing time should be selected according to the type of cement used, admixtures, external environmental conditions, etc.;

[0033] (6) The concrete surface quality should be checked immediately after the formwork is removed. If there are any quality defects such as honeycombing, they should be repaired with approved materials.

[0034] 2. Installation work at the construction site:

[0035] (1) Positioning and laying out, establishing a site control network, measuring and setting out the location of manholes, and laying out excavation control lines according to soil quality and slope requirements;

[0036] (2) Excavation and pouring of cushion layer. During the excavation process, the elevation should be well controlled and over-excavation is prohibited. After digging to the elevation of the bottom of the manhole, the cushion layer is poured. After the cushion layer has formed strength, the manhole position is positioned and laid out;

[0037] (3) Hoisting and assembling components of the well base 1, check the coordinates: The hoisting and transportation of concrete assembly parts should meet the strength requirements of the specification. After the well base 1 is hoisted into place, check the coordinates;

[0038] (4) Cut off the top ring of the well base 1. A cutting machine should be used to cut off the ring. After the cutting is completed, epoxy paint should be applied to the top surface of the ring to prevent the ring from rusting;

[0039] (5) Clean the surface of the first groove 5 of the well base 1 to ensure that the surface of the groove is clean and free of debris. Install the sealing strip 7 at the concave part or the bent part of the first groove 5 and fix the sealing strip 7 with adhesive to prevent the strip from shifting when the second groove 6 is connected. The strip should be generally continuous and overlapping is strictly prohibited.

[0040] (6) When lifting the riser segment 2, clean the surface of the second groove 6 of the riser segment 2 before positioning, and position it in place to ensure that the surface of the groove is clean and free of debris;

[0041] (7) Clean the surface of the first groove 5 of the riser segment 2 to ensure that the groove surface is clean and free of debris. Install the sealing strip 7 at the concave part or the bent part of the first groove 5 and fix the sealing strip 7 with adhesive to prevent the strip from shifting when the second groove 6 is connected. The strip should be continuous and overlapping is strictly prohibited.

[0042] (8) Repeat steps (6) and (7) until the cover plate 3 is hoisted;

[0043] (9) Lift the cover plate 3, clean the second tongue and groove 6 of the cover plate 3 before putting it in place, and put it in place to ensure that the surface of the tongue and groove is clean and free of debris.

[0044] (10) According to the type, specification, waterproof grade requirements of the connected pipe 4, select the embedded sleeve type, embedded gasket type and mortar plugging type. The embedded sleeve type usually embeds the socket of the socket-type pipe 4 in the concrete well wall, and the external pipe 4 is connected to the manhole well by a socket-type connection; the mortar plugging type usually inserts the pipe 4 into the manhole well first, and then uses waterproof mortar to plug it, or supports the formwork and then grouts it, and then cuts off the excess pipe 4 inserted into the well.

[0045] (11) Install the manhole cover 9;

[0046] (12) Inspection of joints, waterproofing and water storage tests of prefabricated components;

[0047] (13) Backfill: Control the thickness of the backfill soil layer. When backfilling, compact it symmetrically. It is strictly forbidden to compact it lopsidedly to avoid excessive compaction on one side, which may cause the manhole to shift or the tongue-and-groove to be misaligned.

[0048] The above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. An assembled concrete well structure, comprising a well base (1), a plurality of riser segments (2) and a cover plate (3) arranged in sequence from bottom to top along the axial direction, characterized in that: Matching first grooves (5) and second grooves (6) are provided between the well base (1) and the riser segment (2), between multiple riser segments (2), and between the riser segment (2) and the cover plate (3); the first groove (5) is provided at the top of the component located at the bottom, the second groove (6) is provided at the bottom of the component located at the top, the second groove (6) is spliced ​​on the first groove (5), and a sealing strip (7) is provided between the first groove (5) and the second groove (6) to seal the splicing part of the concrete well.

2. The assembled concrete well structure according to claim 1 is characterized in that: The tongue and groove is a single tongue and groove, and the sealing strip (7) is arranged at the bending position of the first tongue and groove (5).

3. The assembled concrete well structure according to claim 1 is characterized in that: The tongue and groove are double tongue and groove, the middle part of the first tongue and groove (5) is concave downwards, and the sealing strip (7) is arranged at the concave part of the first tongue and groove (5).

4. The assembled concrete well structure according to claim 1 is characterized in that: The tongue and groove form a certain angle with the horizontal direction, and the angle is 100°±5°.

5. The assembled concrete well structure according to claim 1 is characterized in that: The bottom of the sealing strip (7) is coated with adhesive.

6. The assembled concrete well structure according to claim 1 is characterized in that: The top sections of the well base (1), the multi-section riser segments (2) and the cover plate (3) are pre-buried with lifting rings.

7. The assembled concrete well structure according to claim 1 is characterized in that: A ladder (8) is provided on the inner wall of the well base (1) and the riser segment (2).

8. The assembled concrete well structure according to claim 1 is characterized in that: A pipeline (4) is arranged on the side wall of the well base (1) or the riser segment (2).

9. The assembled concrete well structure according to claim 6, characterized in that: The lifting ring is cut off after being installed in place, and the cut surface of the lifting ring is painted with epoxy paint.

10. The assembled concrete well structure according to claim 1, characterized in that: Steel bars are arranged in the well base (1), the riser segment (2) and the cover plate (3).

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