Prefabricated reinforced concrete inspection well and construction method thereof

Abstract

The application relates to the technical field of inspection well construction, in particular to a prefabricated reinforced concrete inspection well and a construction method thereof, which comprises an upper well cylinder, a lower well cylinder, a connecting unit and a sealing unit. The bottom of the upper well cylinder is provided with a first connecting mechanism of the connecting unit, the top of the lower well cylinder is provided with a second connecting mechanism of the connecting unit, the first connecting mechanism and the second connecting mechanism are matched and connected, the first connecting protrusion of the first connecting mechanism is connected with the first sealing mechanism of the sealing unit, and the side wall of the first connecting groove of the second connecting mechanism is provided with a puncture mechanism. The prefabricated reinforced concrete inspection well and the construction method thereof are simple to operate, the upper well cylinder and the lower well cylinder can be connected to complete the installation, and the polyurethane obtained after the first liquid ring bag and the second liquid ring bag are punctured can seal the upper well cylinder and the lower well cylinder.

Description

Technical Field

[0001] This invention relates to the field of manhole construction technology, and in particular to a prefabricated reinforced concrete manhole and its construction method. Background Technology

[0002] Inspection wells are installed 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 intersections, bends, changes in pipe diameter or slope, and at regular intervals along straight pipe sections to facilitate periodic inspections of ancillary structures. Currently, most inspection wells in urban construction are built on-site using brick masonry or concrete pouring, which is complex to operate and delays construction. Precast reinforced concrete modular inspection wells are also used, but existing modular prefabricated inspection wells are relatively complex to assemble, and their sealing performance deteriorates over long-term use. Summary of the Invention

[0003] The purpose of this invention is to provide a prefabricated reinforced concrete inspection well and its construction method. The operation is simple, and the installation can be completed by connecting the upper and lower well casings. After the first and second liquid rings are punctured, polyurethane is obtained to seal the upper and lower well casings.

[0004] To achieve the above objectives, the present invention provides a prefabricated reinforced concrete inspection well, comprising an upper well casing, a lower well casing, a connecting unit, and a sealing unit. The bottom of the upper well casing is provided with a first connecting mechanism of the connecting unit, and the top of the lower well casing is provided with a second connecting mechanism of the connecting unit. The first connecting mechanism and the second connecting mechanism are matched and connected. The first connecting protrusion of the first connecting mechanism is connected to the first sealing mechanism of the sealing unit, and the side wall of the first connecting groove of the second connecting mechanism is provided with a puncture mechanism.

[0005] Preferably, the first connecting protrusion of the first connecting mechanism is located at the bottom of the upper wellbore, and the bottom of the upper wellbore is provided with a second connecting protrusion outside the first connecting protrusion. A first sealing cavity is provided between the first connecting protrusion and the second connecting protrusion. A plurality of first sealing mechanisms are evenly provided on the sidewall of the first connecting protrusion in the first sealing cavity. A first positioning trapezoidal block is provided below the first sealing mechanism of the first connecting protrusion.

[0006] Preferably, the second connecting mechanism has a second connecting ring groove outside the first connecting groove, the second connecting ring groove is inserted into the second connecting protrusion, the first connecting protrusion is inserted into the first connecting groove, and the first connecting groove has a second positioning block below the piercing mechanism.

[0007] Preferably, the first liquid ring bladder of the first sealing mechanism is located below the second liquid ring bladder, and a first positioning trapezoidal block is provided below the second liquid ring bladder. The outer edges of the first liquid ring bladder and the outer edges of the second liquid ring bladder are on the same vertical line, and the cross-sectional width of the first liquid ring bladder is greater than the cross-sectional width of the first positioning trapezoidal block.

[0008] Preferably, the puncture mechanism includes a plurality of puncture tips, the ends of which are connected to the sidewall of the first connecting groove, the puncture head at the top of the puncture tip is inclined upward, and the cross-sectional width of the puncture tip is smaller than the cross-sectional width of the second positioning block.

[0009] Preferably, the lower sidewall of the lower shaft is provided with a first connecting hole and a second connecting hole. The first connecting hole is inserted into a first connecting pipe, and the second connecting hole is inserted into a second connecting pipe. A first irregular sealing ring is fitted on the first connecting pipe, and a second irregular sealing ring is fitted on the second connecting pipe.

[0010] Preferably, the depth of the first connecting groove is greater than the depth of the second connecting ring groove, and there is a gap between the bottom of the first connecting protrusion and the bottom of the first connecting groove.

[0011] Preferably, the height of the first connecting protrusion is greater than the height of the second connecting protrusion, and the lowest point of the second connecting protrusion is lower than the lowest point of the first positioning trapezoidal block.

[0012] Preferably, the sidewall of the first connecting protrusion contacts the edge of the second positioning block, the cross-section of the second positioning block is a right triangle, and the hypotenuse of the second positioning block contacts and connects with the hypotenuse of the first positioning trapezoidal block.

[0013] The construction method for the above-mentioned precast reinforced concrete inspection well includes the following steps: S1. Excavate the manhole foundation pit. The width of each side of the pit should be 30-50 cm greater than the width of each side of the manhole base. The base of the pit should be leveled and compacted with sand and gravel. S2. Determine the location of the well foundation on the base in S1 and place the well foundation. Hoist the lower well casing to connect with the well foundation. A sealing ring is provided between the lower well casing and the well foundation. Fill the first connecting groove with cement-based slurry. S3. Hoist the upper well casing to the top of the lower well casing, align the first connecting protrusion and the first connecting groove, the second connecting protrusion and the second connecting ring groove, and then gradually lower the upper well casing. The piercing tip gradually contacts and punctures the first and second liquid rings. After being punctured in S4 and S3, the first and second liquid rings release polyol and isocyanate respectively. After mixing, the polyol and isocyanate expand at the bottom of the upper wellbore and between the second positioning block, sealing the upper and lower wellbore together. S5. Use waterproof mortar to fill the joint gap between the upper and lower well casings; S6. Connect the first connecting pipe to the first connecting hole, connect the second connecting pipe to the second connecting hole, and pour concrete at the two interfaces.

[0014] Therefore, the present invention adopts the above-mentioned prefabricated reinforced concrete inspection well and its construction method, which is simple to operate. The installation can be completed by connecting the upper and lower well cylinders accordingly. After the first and second liquid ring bladders are punctured, polyurethane is obtained to seal the upper and lower well cylinders.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a front sectional view of a prefabricated reinforced concrete inspection well according to the present invention; Figure 2 This is a schematic diagram of the upper shaft of a prefabricated reinforced concrete inspection well according to the present invention; Figure 3 This is a schematic diagram of the lower shaft of a prefabricated reinforced concrete inspection well according to the present invention; Figure 4 This is the present invention. Figure 1 Enlarged view of point A in the image; Figure 5 This is the present invention. Figure 1 The intention to enlarge point B in the image; Figure 6 This is the present invention. Figure 1 Enlarged view of point C in the image; Figure 7 This is the present invention. Figure 2 Enlarged view of point D in the image; Figure 8 This is the present invention. Figure 3 Enlarged view of point E in the image.

[0017] Figure label: 1. Upper wellbore; 2. Lower wellbore; 3. Connecting unit; 31. First connecting protrusion; 32. First connecting groove; 33. Second connecting protrusion; 34. Second connecting annular groove; 35. First positioning trapezoidal block; 36. Second positioning block; 4. Sealing unit; 41. First liquid annular bladder; 42. Second liquid annular bladder; 43. First sealing cavity; 5. Puncture tip; 6. First connecting pipe; 7. Second connecting pipe; 8. First irregular sealing ring; 9. Second irregular sealing ring. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Unless otherwise defined, the technical or scientific terms used in this invention should be understood in their ordinary sense by those skilled in the art. The features mentioned above or in the specific examples mentioned in this invention can be combined arbitrarily, and these specific embodiments are only used to illustrate the invention and are not intended to limit the scope of the invention.

[0019] Example 1 like Figure 1 As shown, the present invention provides a prefabricated reinforced concrete inspection well, including an upper well casing 1, a lower well casing 2, a connecting unit 3, and a sealing unit 4. The bottom of the upper well casing 1 is provided with a first connecting mechanism of the connecting unit 3, and the top of the lower well casing 2 is provided with a second connecting mechanism of the connecting unit 3. The first and second connecting mechanisms are matched and connected. The first connecting protrusion 31 of the first connecting mechanism is connected to the first sealing mechanism of the sealing unit 4, and the side wall of the first connecting groove 32 of the second connecting mechanism is provided with a piercing mechanism.

[0020] The first connecting mechanism and the second connecting mechanism are connected to each other, thereby connecting the upper wellbore 1 and the lower wellbore 2. During the connection process, the piercing mechanism punctures the first sealing mechanism, thereby sealing the gap between the upper wellbore 1 and the lower wellbore 2 after they are connected.

[0021] like Figure 2 and Figure 7 As shown, the first connecting protrusion 31 of the first connecting mechanism is located at the bottom of the upper shaft 1, and a second connecting protrusion 33 is provided outside the first connecting protrusion 31 at the bottom of the upper shaft 1. A first sealing cavity 43 is provided between the first connecting protrusion 31 and the second connecting protrusion 33. A plurality of first sealing mechanisms are evenly provided on the sidewall of the first connecting protrusion 31 within the first sealing cavity 43. A first positioning trapezoidal block 35 is provided below the first sealing mechanism on the first connecting protrusion 31. The first sealing cavity 43 can protect the first sealing mechanism and prevent it from being damaged during the movement and transportation of the upper shaft 1, thus affecting its subsequent use.

[0022] like Figure 3 and Figure 8 As shown, the second connecting mechanism has a second connecting ring groove 34 outside the first connecting groove 32, and the second connecting ring groove 34 is inserted into the second connecting protrusion 33. The first connecting protrusion 31 is inserted into the first connecting groove 32, and the first connecting groove 32 has a second positioning block 36 below the piercing mechanism.

[0023] like Figure 4As shown, the first connecting protrusion 31 is connected to the first connecting groove 32, and the second connecting protrusion 33 is connected to the second connecting annular groove 34. After the first positioning trapezoidal block 35 and the second positioning block 36 are connected, the connection position of the upper wellbore 1 and the lower wellbore 2 is positioned, and a sealing structure is formed between the second positioning block 36 and the first sealing cavity 43. This allows the polyol and isocyanate released by the first liquid annular bladder 41 and the second liquid annular bladder 42 to react and expand to form polyurethane, which seals the connection between the upper wellbore 1 and the lower wellbore 2.

[0024] The first liquid ring bladder 41 of the first sealing mechanism is located below the second liquid ring bladder 42, and a first positioning trapezoidal block 35 is provided below the second liquid ring bladder 42. The outer edges of the first liquid ring bladder 41 and the outer edges of the second liquid ring bladder 42 are on the same vertical line, and the cross-sectional width of the first liquid ring bladder 41 is greater than the cross-sectional width of the first positioning trapezoidal block 35.

[0025] During the connection process between the upper wellbore 1 and the lower wellbore 2, the first liquid annular capsule 41 and the second liquid annular capsule 42 are gradually punctured by the piercing tip 5, releasing the polyol and isocyanate within them. Because the edge of the first positioning trapezoidal block 35 contacts the sidewall of the first connecting protrusion 31 after the connection between the upper wellbore 1 and the lower wellbore 2, the polyol and isocyanate are prevented from continuing to flow downwards. The cross-sectional widths of the first liquid annular capsule 41, the second liquid annular capsule 42, and the first positioning trapezoidal block 35 are designed to ensure that the piercing tip 5 punctures both the first liquid annular capsule 41 and the second liquid annular capsule 42 simultaneously when it contacts the first positioning trapezoidal block 35.

[0026] The puncture mechanism includes several puncture tips 5, the ends of which are connected to the sidewall of the first connecting groove 32. The puncture head at the top of the puncture tip 5 is inclined upward, and the cross-sectional width of the puncture tip 5 is smaller than the cross-sectional width of the second positioning block 36. The puncture tips 5 puncture the first liquid annulus 41 and the second liquid annulus 42, allowing polyurethane to seal the upper wellbore 1 and the lower wellbore 2.

[0027] The lower sidewall of the lower shaft 2 is provided with a first connecting hole and a second connecting hole. The first connecting hole is inserted into the first connecting pipe 6, and the second connecting hole is inserted into the second connecting pipe 7. A first irregular sealing ring 8 is fitted on the first connecting pipe 6, and a second irregular sealing ring 9 is fitted on the second connecting pipe 7. The first connecting pipe 6 is connected to the first connecting hole, and the second connecting pipe 7 is connected to the second connecting hole.

[0028] like Figure 5 and Figure 6As shown, the first irregular-shaped sealing ring 8 and the second irregular-shaped sealing ring 9 have the same shape. The diameter of the second irregular-shaped sealing ring 9 at the connection point with the second connecting hole is smaller than the diameter of the second irregular-shaped sealing ring 9 outside the second connecting hole. The shape of the first irregular-shaped sealing ring 8 and the second irregular-shaped sealing ring 9 is designed to seal the gap between the first connecting pipe 6 and the second connecting pipe 7 to prevent water leakage at the gap.

[0029] The depth of the first connecting groove 32 is greater than the depth of the second connecting ring groove 34, and there is a gap between the bottom of the first connecting protrusion 31 and the bottom of the first connecting groove 32. The gap between the first connecting groove 32 and the first connecting protrusion 31 is used to place cement-based grout, thereby fixing the upper shaft 1 and the lower shaft 2 together.

[0030] The height of the first connecting protrusion 31 is greater than the height of the second connecting protrusion 33, and the lowest point of the second connecting protrusion 33 is lower than the lowest point of the first positioning trapezoidal block 35. The setting of the lowest point of the second connecting protrusion 33 protects the first liquid ring 41 and the second liquid ring 42 within the first sealing cavity 43, preventing damage during the transportation of the upper wellbore 1.

[0031] The sidewall of the first connecting protrusion 31 contacts the edge of the second positioning block 36. The cross-section of the second positioning block 36 is a right-angled triangle, and the hypotenuse of the second positioning block 36 contacts and connects with the hypotenuse of the first positioning trapezoidal block 35. The second positioning block 36 seals the polyol and isocyanate released by the first liquid ring bladder 41 and the second liquid ring bladder 42. The contact connection between the first positioning trapezoidal block 35 and the second positioning block 36 positions the upper wellbore 1 and the lower wellbore 2.

[0032] Example 2 The construction method for precast reinforced concrete inspection wells in Example 1 includes the following steps: S1. Excavate the manhole foundation pit. The width of each side of the pit should be 30-50 cm greater than the width of each side of the manhole base. The base of the pit should be leveled and compacted with sand and gravel.

[0033] S2. Determine the location of the well base on the base in S1 and place the well base. Hoist the lower well casing 2 to connect with the well base. A sealing ring is provided between the lower well casing 2 and the well base. Fill the first connecting groove 32 with cement-based slurry.

[0034] S3. Hoist the upper well casing 1 to the top of the lower well casing 2, align the first connecting protrusion 31 and the first connecting groove 32, the second connecting protrusion 33 and the second connecting ring groove 34, and gradually lower the upper well casing 1. The piercing tip 5 gradually contacts and punctures the first liquid ring 41 and the second liquid ring 42.

[0035] After being punctured in S4 and S3, the first liquid ring 41 and the second liquid ring 42 release polyol and isocyanate respectively. After mixing, the polyol and isocyanate expand between the bottom of the upper wellbore 1 and the second positioning block 36, sealing the upper wellbore 1 and the lower wellbore 2 together.

[0036] S5. Use waterproof mortar to fill the joint gap between the upper shaft 1 and the lower shaft 2.

[0037] S6. Connect the first connecting pipe 6 to the first connecting hole, and connect the second connecting pipe 7 to the second connecting hole, and pour concrete at the two interfaces.

[0038] Therefore, the present invention adopts a prefabricated reinforced concrete inspection well with the above structure and its construction method. It is simple to operate, and the installation can be completed by connecting the upper and lower well cylinders. After the first and second liquid ring bladders are punctured, polyurethane is obtained to seal the upper and lower well cylinders.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A precast reinforced concrete inspection well, comprising an upper well casing, a lower well casing, a connecting unit, and a sealing unit, characterized in that: The bottom of the upper wellbore is provided with a first connecting mechanism of the connecting unit, and the top of the lower wellbore is provided with a second connecting mechanism of the connecting unit. The first connecting mechanism and the second connecting mechanism are matched and connected. The first connecting protrusion of the first connecting mechanism is connected to the first sealing mechanism of the sealing unit. The side wall of the first connecting groove of the second connecting mechanism is provided with a puncture mechanism.

2. The precast reinforced concrete inspection well according to claim 1, characterized in that: The first connecting protrusion of the first connecting mechanism is located at the bottom of the upper wellbore. A second connecting protrusion is provided outside the first connecting protrusion at the bottom of the upper wellbore. A first sealing cavity is provided between the first connecting protrusion and the second connecting protrusion. A plurality of first sealing mechanisms are evenly provided on the sidewall of the first connecting protrusion in the first sealing cavity. A first positioning trapezoidal block is provided below the first sealing mechanism on the first connecting protrusion.

3. A precast reinforced concrete inspection well according to claim 2, characterized in that: The second connecting mechanism has a second connecting ring groove outside the first connecting groove, the second connecting ring groove is inserted into the second connecting protrusion, the first connecting protrusion is inserted into the first connecting groove, and the first connecting groove has a second positioning block below the piercing mechanism.

4. A precast reinforced concrete inspection well according to claim 3, characterized in that: The first liquid ring bladder of the first sealing mechanism is located below the second liquid ring bladder. A first positioning trapezoidal block is provided below the second liquid ring bladder. The outer edges of the first liquid ring bladder and the outer edges of the second liquid ring bladder are on the same vertical line. The cross-sectional width of the first liquid ring bladder is greater than the cross-sectional width of the first positioning trapezoidal block.

5. A precast reinforced concrete inspection well according to claim 4, characterized in that: The puncture mechanism includes several puncture tips, the ends of which are connected to the sidewall of the first connecting groove. The puncture head at the top of the puncture tip is inclined upward, and the cross-sectional width of the puncture tip is smaller than the cross-sectional width of the second positioning block.

6. A precast reinforced concrete inspection well according to claim 5, characterized in that: The lower sidewall of the shaft is provided with a first connecting hole and a second connecting hole. The first connecting hole is inserted into the first connecting pipe, and the second connecting hole is inserted into the second connecting pipe. A first irregular sealing ring is fitted on the first connecting pipe, and a second irregular sealing ring is fitted on the second connecting pipe.

7. A precast reinforced concrete inspection well according to claim 6, characterized in that: The depth of the first connecting groove is greater than the depth of the second connecting ring groove, and there is a gap between the bottom of the first connecting protrusion and the bottom of the first connecting groove.

8. A precast reinforced concrete inspection well according to claim 7, characterized in that: The height of the first connecting protrusion is greater than the height of the second connecting protrusion, and the lowest point of the second connecting protrusion is lower than the lowest point of the first positioning trapezoidal block.

9. A precast reinforced concrete inspection well according to claim 8, characterized in that: The sidewall of the first connecting protrusion contacts the edge of the second positioning block. The cross-section of the second positioning block is a right triangle, and the hypotenuse of the second positioning block contacts and connects with the hypotenuse of the first positioning trapezoidal block.

10. A construction method for a precast reinforced concrete inspection well according to claim 9, characterized in that: Includes the following steps, S1. Excavate the manhole foundation pit. The width of each side of the pit should be 30-50 cm greater than the width of each side of the manhole base. The base of the pit should be leveled and compacted with sand and gravel. S2. Determine the location of the well foundation on the base in S1 and place the well foundation. Hoist the lower well casing to connect with the well foundation. A sealing ring is provided between the lower well casing and the well foundation. Fill the first connecting groove with cement-based slurry. S3. Hoist the upper well casing to the top of the lower well casing, align the first connecting protrusion and the first connecting groove, the second connecting protrusion and the second connecting ring groove, and then gradually lower the upper well casing. The piercing tip gradually contacts and punctures the first and second liquid rings. After being punctured in S4 and S3, the first and second liquid rings release polyol and isocyanate respectively. After mixing, the polyol and isocyanate expand at the bottom of the upper wellbore and between the second positioning block, sealing the upper and lower wellbore together. S5. Use waterproof mortar to fill the joint gap between the upper and lower well casings; S6. Connect the first connecting pipe to the first connecting hole, connect the second connecting pipe to the second connecting hole, and pour concrete at the two interfaces.

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