Flow-state material anti-seepage prefabricated well-pipe connector structure and construction method thereof

Abstract

In two adjacent sections of prefabricated wells / pipes, a circle of outer rabbets are formed in the outer edge of the upper end face of the lower prefabricated well / pipe, and a circle of inner rabbets are formed in the inner edge of the lower end face of the upper prefabricated well / pipe. After two adjacent sections of prefabricated wells / pipes are inserted up and down, a cavity is formed between the outer rabbet and the inner rabbet, a slurry outlet communicated with the cavity is formed in the outer wall of the prefabricated well / pipe located on the upper portion, a grouting opening communicated with the cavity is formed in the inner wall of the prefabricated well / pipe located on the lower portion, and the cavity is filled with a flow-state anti-seepage material through the grouting opening. The prefabricated well / pipe has the beneficial effects that after installation is completed, grouting and seepage prevention are conducted, meanwhile, the stability of a connector is guaranteed, when a flow-state seepage prevention material is injected, the cavity can be filled with the flow-state seepage prevention material through the grouting opening, the flow-state seepage prevention material can flow out through the grout outlet, a cavity between the exterior of the prefabricated well / pipe and a surrounding soil body is filled, and the interior and exterior seepage prevention integration is achieved; it is guaranteed that the constructed well / pipe and the surrounding soil body are combined into a whole.

Description

Technical Field

[0001] This invention relates to the field of precast concrete well / pipe technology, specifically to a fluid material seepage-proof precast well-pipe interface structure and its construction method. Background Technology

[0002] With the rapid development of urbanization in my country, the requirements for urban infrastructure construction are constantly increasing. Drainage systems, as a crucial component, simultaneously impact urban planning and the ecological environment. Currently, most cities and towns have made improving their drainage systems one of the top priorities in their urbanization development.

[0003] The drainage system construction consists of newly built pipe networks that intercept sewage and direct it to sewage treatment plants for processing. For some pipes buried at greater depths, prefabricated manholes / pipes will be considered for installation. While prefabricated manholes / pipes are currently efficient and have low requirements for on-site construction conditions, the lack of proper joint treatment measures, or external soil erosion causing settlement and deformation of the manhole / pipe structure, leads to severe water seepage at the joints, compromising project quality and causing environmental pollution. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a prefabricated well-pipe interface structure for seepage prevention of fluidized material and its construction method, so as to overcome the shortcomings of the prior art.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A fluid material seepage-proof precast well-pipe interface structure includes: multiple precast wells / pipes connected sequentially by upper and lower sockets. In two adjacent precast wells / pipes, the outer edge of the upper end face of the lower precast well / pipe is provided with an outer tongue and groove, and the inner edge of the lower end face of the upper precast well / pipe is provided with an inner tongue and groove. After the two adjacent precast wells / pipes are inserted into each other, a cavity is formed between the outer tongue and groove and the inner tongue and groove. A grout outlet communicating with the cavity is opened on the outer wall of the upper precast well / pipe, and a grouting port communicating with the cavity is opened on the inner wall of the lower precast well / pipe. The cavity is filled with fluid seepage-proof material through the grouting port.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the cross-sectional shape of the cavity is hourglass-shaped or barbell-shaped.

[0008] Furthermore, the components of fluidized impermeable material include fluidized solidified soil, waterproof mortar, and organic polyurethane and other waterproof and impermeable materials.

[0009] Furthermore, depending on the grouting location, different strengths of fluidized impermeable materials can be selected. For example, low-strength fluidized solidified soil can be used for external filling reinforcement, while early-strength grouting material or organic polyurethane can be used for internal grouting reinforcement.

[0010] Furthermore, the strength of the fluidized impermeable material ranges from 0.5 MPa to 30 MPa.

[0011] Furthermore, when the fluidized impermeable material is used for grouting and seepage prevention in the external cavity of wells / pipes, a strength of 0.5MPa to 2MPa is selected; when it is used for grouting in the internal structure of the cavity, a strength of 20MPa to 30MPa is selected.

[0012] Furthermore, the initial setting time of the fluidized impermeable material shall not be earlier than 45 minutes, and the final setting time shall not be later than 12 hours.

[0013] Furthermore, in two adjacent precast well / pipe sections, there is an annular groove between the lower end face of the upper precast well / pipe and the outer tongue of the lower precast well / pipe, which surrounds the cavity and communicates with the cavity. A rubber ring surrounding the cavity is provided in the annular groove.

[0014] Furthermore, in two adjacent precast well / pipe sections, there is a gap between the inner tongue and groove of the upper precast well / pipe and the upper end face of the lower precast well / pipe, which is connected to the cavity, and at least one ring of water-swellable rubber strip is inserted into the gap.

[0015] Furthermore, the gap between two adjacent precast well / pipe sections is filled with expanding waterproof polyurethane or mortar inside the water-swellable rubber strip.

[0016] Based on the above technical solution, the present invention also provides a construction method for a precast well-pipe interface structure with fluidized material seepage prevention, for constructing the above-mentioned precast well / pipe interface structure with seepage prevention concrete, comprising the following steps: S1. Hoist a prefabricated well / pipe and place a rubber ring on the outer tongue and groove of the prefabricated well / pipe; S2. Hoist another precast well / pipe and connect the upper precast well / pipe to the lower precast well / pipe in a socket manner, and make the upper precast well / pipe cooperate with the lower precast well / pipe to press the rubber ring. S3. Insert at least one ring of water-swellable rubber strip around the cavity into the gap; S4. The cavity is filled with fluid seepage-proof material through the grouting port, and the injected fluid seepage-proof material can flow out through the grout outlet to fill the void between the outside of the precast well / pipe and the surrounding soil, so as to achieve integrated internal and external seepage prevention.

[0017] The beneficial effects of this invention are as follows: The joint between the upper and lower precast well / pipe sections uses a tongue-and-groove fit instead of the traditional tight fit. When adjacent precast well / pipe sections are inserted, a reserved cavity is formed between the outer and inner tongue-and-groove joints. This reserved cavity provides sufficient flow space for subsequent grouting steps while maintaining stability at the joint, allowing the injected fluid waterproofing material to effectively fill the cavity. The fluid waterproofing material solidifies in a short time and undergoes varying degrees of micro-expansion at different curing stages, filling the cavity and improving overall compactness and impermeability. It plays a significant role in waterproofing and seepage prevention in areas with high groundwater levels, quicksand, or complex pipelines. Furthermore, the expansion rate and compressive strength of the fluid waterproofing material increase synchronously with time at each curing stage, resulting in increasingly better seepage prevention in later stages. The stronger the grout, the more stable the joint at the interface, making the connection tighter. There is no need to apply mortar to the outer wall of the joint. Other operations can be carried out directly after grouting, which is highly efficient. No subsequent operations are required. Just control the appropriate amount of fluid grout according to the ratio. The addition of rubber rings and water-swellable rubber strips, together with the solidified fluid grout, can further play a role in preventing leakage. When injecting fluid grout, not only can the cavity be filled through the grouting port, but the fluid grout can also flow out through the grout outlet to fill the voids between the outside of the precast well / pipe and the surrounding soil, realizing the overall internal and external seepage prevention. This ensures that the constructed well / pipe and the surrounding soil are integrated as a whole. That is, if the precast well-pipe is used for many years and experiences settlement and deformation, it can still be reinforced by post-grouting through the grouting port. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the precast well / pipe interface structure of the anti-seepage concrete in this invention.

[0019] The attached diagram lists the components represented by each number as follows: 1. Precast well / pipe, 110, outer tongue and groove, 120, inner tongue and groove, 130, grouting port, 140, grout outlet, 2. cavity, 3. annular groove, 4. rubber ring, 5. gap, 6. water-swellable rubber strip, 7. fluid seepage prevention material. Detailed Implementation

[0020] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0021] Example 1 like Figure 1 As shown, a prefabricated well-pipe interface structure for flowable material seepage prevention includes: Multiple prefabricated well / pipe sections 1 are connected sequentially using an upper and lower socket joint. In each adjacent section, the outer edge of the upper end face of the lower section has an outer tongue-and-groove joint 110, while the inner edge of the lower end face of the upper section has an inner tongue-and-groove joint 120. When two adjacent sections are inserted into each other, a sealed cavity 2 is formed between the outer tongue-and-groove joint 110 and the inner tongue-and-groove joint 120. The outer wall of the upper section of the prefabricated well / pipe 1... A grout outlet 140 communicating with the cavity 2 is opened, and a grout injection port 130 communicating with the cavity 2 is opened on the inner wall of the precast well / pipe 1 located below. The cavity 2 is filled with fluid anti-seepage material 7 through the grout injection port 130. The injected fluid anti-seepage material 7 can flow out through the grout outlet 140 to fill the void between the outside of the precast well / pipe 1 and the surrounding soil, so as to achieve integrated internal and external anti-seepage.

[0022] Example 2 like Figure 1 As shown, this embodiment is a further improvement on embodiment 1, as detailed below: The cross-sectional shape of cavity 2 is hourglass-shaped or barbell-shaped. After the fluid seepage-proof material 7 solidifies, the hourglass-shaped or barbell-shaped structure formed can not only prevent seepage, but also prevent the upper and lower prefabricated wells / pipes 1 from misaligning and separating.

[0023] Example 3 like Figure 1 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below: The components of fluidized seepage-proof material 7 include: fluidized solidified soil, waterproof mortar, and organic polyurethane and other waterproof and seepage-proof materials.

[0024] Furthermore, the strength of the fluidized impermeable material 7 is between 0.5MPa and 30MPa. When the fluidized impermeable material 7 is used for grouting and seepage prevention in the external cavity of wells / pipes, the strength is selected from 0.5MPa to 2MPa. When it is used for grouting in the internal structure of the cavity, the strength is selected from 20MPa to 30MPa.

[0025] The above structure can play a high-efficiency and high-quality role in seepage prevention, naturally filling and sealing the cavity 2. The initial setting time of the fluid seepage prevention material 7 is no earlier than 45 minutes and the final setting time is no later than 12 hours. The expansion rate and compressive strength remain stable at each age as time increases, the strength does not decrease, and there is no shrinkage that would reduce the seepage prevention effect.

[0026] Example 4 like Figure 1 As shown, this embodiment is a further improvement on embodiment 1, 2, or 3, as detailed below: Between the lower end face of the upper precast well / pipe 1 and the outer tongue 110 of the lower precast well / pipe 1 in two adjacent precast well / pipe sections 1, there is an annular groove 3. The annular groove 3 surrounds the cavity 2 and communicates with the cavity 2. A rubber ring 4 surrounding the cavity 2 is provided inside the annular groove 3.

[0027] Furthermore, in two adjacent prefabricated well / pipe sections 1, there is a gap 5 that surrounds and communicates with the cavity 2 between the inner tongue-and-groove joint 120 of the upper prefabricated well / pipe 1 and the upper end face of the lower prefabricated well / pipe 1. That is, it can be understood that the height of the outer tongue-and-groove joint 110 is greater than the height of the inner tongue-and-groove joint 120, so a gap 5 can be formed. At least one ring of water-swellable rubber strip 6 surrounding the cavity 2 is inserted into the gap 5. For example, it can be one ring, two rings, three rings, etc., which is just an exemplary description here.

[0028] The gap between two adjacent precast well / pipe sections 1 is filled with expanding waterproof polyurethane or mortar on the inside of the water-swellable rubber strip 6.

[0029] Example 5 A construction method for a precast well-pipe interface structure with fluidized material seepage prevention, used to construct the seepage prevention concrete precast well / pipe interface structure as described in any of Examples 1 to 4, includes the following steps: S1. Hoist a prefabricated well / pipe 1 and place a rubber ring 4 on the outer tongue-and-groove joint 110 of the prefabricated well / pipe 1; S2. Hoist another precast well / pipe 1 and connect the upper precast well / pipe 1 with the lower precast well / pipe 1 in a socket manner, and the upper precast well / pipe 1 cooperates with the lower precast well / pipe 1 to press the rubber ring 4. S3. Insert at least one ring of water-swellable rubber strip 6 around the cavity 2 into the gap 5; S4. The cavity 2 is filled with fluidized impermeable material 7 through the grouting port 130, and the injected fluidized impermeable material 7 can flow out through the grouting port 140 to fill the void between the outside of the precast well / pipe 1 and the surrounding soil, so as to achieve integrated internal and external impermeability.

[0030] The embodiments of the present invention are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A prefabricated well-pipe interface structure for flowable material seepage prevention, characterized in that, include: Multiple prefabricated wells / pipes (1) are connected sequentially by upper and lower sockets. In two adjacent prefabricated wells / pipes (1), the outer edge of the upper end face of the lower prefabricated well / pipe (1) is provided with an outer tongue-and-groove joint (110), and the inner edge of the lower end face of the upper prefabricated well / pipe (1) is provided with an inner tongue-and-groove joint (120). After the two adjacent prefabricated wells / pipes (1) are inserted into each other, a cavity (2) is formed between the outer tongue-and-groove joint (110) and the inner tongue-and-groove joint (120). A grout outlet (140) communicating with the cavity (2) is opened on the outer wall of the upper prefabricated well / pipe (1), and a grouting port (130) communicating with the cavity (2) is opened on the inner wall of the lower prefabricated well / pipe (1). The cavity (2) is filled with fluid seepage-proof material (7) through the grouting port (130).

2. The prefabricated well-pipe interface structure for seepage prevention using fluidized material according to claim 1, characterized in that, The grouting port (130) is located at the lower position of the cavity (2), and the grout outlet (140) is distributed obliquely upward.

3. The prefabricated well-pipe interface structure for seepage prevention using fluidized material according to claim 1, characterized in that, The cross-sectional shape of the cavity (2) is hourglass or barbell.

4. The prefabricated well-pipe interface structure for seepage prevention using fluidized material according to claim 1, characterized in that, The fluidized impermeable material (7) comprises: fluidized solidified soil, waterproof mortar and organic polyurethane and other waterproof and impermeable materials.

5. The prefabricated well-pipe interface structure for seepage prevention using fluidized material according to claim 4, characterized in that, The strength of the fluid impermeable material (7) is between 0.5 MPa and 30 MPa.

6. The prefabricated well-pipe interface structure for seepage prevention using fluidized material according to claim 5, characterized in that, The fluidized impermeable material (7) is selected with a strength of 0.5MPa to 2MPa when used for grouting and seepage prevention in the external cavity of wells / pipes, and with a strength of 20MPa to 30MPa when used for grouting in the internal structure of the cavity.

7. A prefabricated well-pipe interface structure for seepage prevention using fluidized material according to any one of claims 1 to 6, characterized in that, Between the lower end face of the upper prefabricated well / pipe (1) and the outer tongue (110) of the lower prefabricated well / pipe (1) in two adjacent prefabricated well / pipe (1), there is an annular groove (3) that surrounds the cavity (2) and communicates with the cavity (2). A rubber ring (4) surrounding the cavity (2) is provided in the annular groove (3).

8. A prefabricated well-pipe interface structure for seepage prevention using fluidized material according to any one of claims 1 to 7, characterized in that, Between the inner tongue (120) of the upper prefabricated well / pipe (1) and the upper end face of the lower prefabricated well / pipe (1) in two adjacent prefabricated well / pipe (1), there is a gap (5) that surrounds the cavity (2) and communicates with the cavity (2), and at least one ring of water-swellable rubber strip (6) surrounding the cavity (2) is inserted into the gap (5).

9. The prefabricated well-pipe interface structure for seepage prevention using fluidized material according to claim 8, characterized in that, The gap between two adjacent precast wells / pipes (1) is filled with expanding waterproof polyurethane or mortar inside the gap (5) on the inside of the water-swellable rubber strip (6).

10. A construction method for a precast well-pipe interface structure with fluidized material seepage prevention, characterized in that, The method for constructing the precast concrete well / pipe interface structure as described in any one of claims 1 to 9 includes the following steps: S1. Hoist a prefabricated well / pipe (1) and place a rubber ring (4) on the outer tongue (110) of the prefabricated well / pipe (1); S2. Hoist another precast well / pipe (1) and connect the upper precast well / pipe (1) with the lower precast well / pipe (1) in a socket manner, and the upper precast well / pipe (1) cooperates with the lower precast well / pipe (1) to press the rubber ring (4). S3. Insert at least one ring of water-swellable rubber strip (6) around the cavity (2) into the gap (5); S4. The cavity (2) is filled with fluidized impermeable material (7) through the grouting port (130), and the injected fluidized impermeable material (7) can flow out through the grout outlet (140) to fill the void between the outside of the precast well / pipe (1) and the surrounding soil, so as to achieve the overall internal and external impermeability integration.

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