Construction method of pipeline and inspection well connection structure and connection structure

Abstract

The application belongs to the technical field of underground engineering, and discloses a construction method of a pipeline and inspection well connecting structure and the connecting structure. The construction method of the pipeline and inspection well connecting structure comprises the following steps: a prefabricated pipe ring is prepared, the prefabricated pipe ring is provided with an expansion cylinder, the axial direction of the expansion cylinder is perpendicular to the axial direction of the prefabricated pipe ring, the expansion cylinder is in communication with the inner cavity of the prefabricated pipe ring, and a part of the expansion cylinder can extend out of the prefabricated pipe ring; a reinforcement area is formed by grouting below the inspection well; the prefabricated pipe ring is jacked to a preset connecting position, the preset connecting position is located in the reinforcement area, and the expansion cylinder faces the inspection well; a connecting channel is formed by excavating downward from the bottom of the inspection well; and a part of the expansion cylinder is lifted, so that the top surface of the expanded expansion cylinder is not lower than the bottom of the inspection well. The construction method can realize the connection between the original inspection well and the newly-built pipeline, can avoid damaging the original inspection well and the surrounding structure, and can reduce the influence on the ground traffic.

Description

Technical Field

[0001] This invention relates to the field of underground engineering technology, and in particular to a construction method and connection structure for a pipeline and inspection well connection structure. Background Technology

[0002] Inspection wells, as an important component of underground pipeline infrastructure (water supply, drainage, power supply, communication, gas supply, heating and street lighting lines, etc.), are usually located at pipeline junctions or bends. Workers can use inspection wells to perform routine maintenance and upkeep of underground pipeline infrastructure to ensure its normal operation.

[0003] With the upgrading and renovation of infrastructure, underground water pipe networks are constantly expanding. Simply by establishing a vertical passage between the existing manholes and the new pipeline, the existing manholes can be used as manholes for the new pipeline. Currently, the connection between existing manholes and new pipelines is generally achieved through two methods. One method is to use a vertical jacking construction method to establish the vertical passage; however, this method damages the existing manhole structure and has a significant impact on the deformation of the ground surface and surrounding structures. The other method is to use the open-cut method for direct construction; however, this method requires closing off the construction area, which can severely disrupt surface traffic in busy areas.

[0004] Therefore, there is an urgent need for a construction method and connection structure for the connection between pipelines and inspection wells to solve the above problems. Summary of the Invention

[0005] According to one aspect of the present invention, a construction method for a pipeline-manhole connection structure is provided, which enables the connection between the existing manhole and the newly built pipeline, avoids damage to the existing manhole and surrounding structures, and reduces the impact on ground traffic.

[0006] To achieve this objective, the present invention adopts the following technical solution: Construction methods for pipe-manhole connection structures include: A precast pipe ring is fabricated, on which a telescopic cylinder is provided. The axial direction of the telescopic cylinder is perpendicular to the axial direction of the precast pipe ring. The telescopic cylinder communicates with the inner cavity of the precast pipe ring, and a portion of the telescopic cylinder can extend out of the precast pipe ring. Grouting is performed below the inspection well to form a reinforced zone; the prefabricated pipe ring is pushed to a preset connection position, which is located within the reinforced zone, and the telescopic cylinder is oriented toward the inspection well; A connecting channel is formed by excavating downwards at the bottom of the inspection well. The vertical projection of the connecting channel covers the telescopic cylinder and part of the prefabricated pipe ring around the telescopic cylinder. A portion of the telescopic cylinder is lifted so that the top surface of the extended telescopic cylinder is not lower than the bottom of the inspection well.

[0007] Optionally, the telescopic cylinder includes an inner cylinder and an outer cylinder arranged coaxially. The outer cylinder is connected to the prefabricated pipe ring. The inner wall of the outer cylinder is provided with an inner limiting ring, and the outer wall of the inner cylinder is provided with an outer limiting ring. The inner cylinder can move upward to extend out of the outer cylinder, and the top surface of the outer limiting ring can abut against the bottom surface of the inner limiting ring.

[0008] Optionally, the top surface of the inner cylinder does not protrude from the outer wall of the precast tube ring, and the precast tube ring is also provided with a top cover, which is detachably installed on the top opening of the outer cylinder.

[0009] Optionally, "lifting a portion of the telescopic cylinder" specifically includes: Lift the top cover and remove it from the connecting channel; The inner cylinder is lifted up so that the top surface of the outer limiting ring abuts against the bottom surface of the inner limiting ring; The inner cylinder and the outer cylinder are connected and fixed.

[0010] Optionally, the construction method for the connection structure between the pipeline and the inspection well further includes: Concrete is poured between the inner wall of the connecting channel and the outer wall of the telescopic cylinder to form a concrete filling area. The upper surface of the concrete filling area is flush with the top surface of the extended telescopic cylinder.

[0011] According to another aspect of the present invention, a pipe-to-manhole connection structure is provided. The pipe-to-manhole connection structure uses the construction method of the pipe-to-manhole connection structure as described in any of the above claims to connect the manhole and the pipe. The pipe-to-manhole connection structure includes a precast pipe ring and a telescopic cylinder. The precast pipe ring is arranged in series at a predetermined connection position in the pipe. The precast pipe ring has a circumferential reinforcement zone. One end of the telescopic cylinder is connected to the precast pipe ring and communicates with the pipe. The other end of the telescopic cylinder extends upward and communicates with the manhole.

[0012] Optionally, the telescopic cylinder includes an inner cylinder and an outer cylinder arranged coaxially. The outer cylinder is connected to the prefabricated pipe ring. The inner wall of the outer cylinder is provided with an inner limiting ring, and the outer wall of the inner cylinder is provided with an outer limiting ring. The inner cylinder can move upward and extend out of the outer cylinder. The top surface of the outer limiting ring can abut against the bottom surface of the inner limiting ring.

[0013] Optionally, the top surface of the outer limiting ring is provided with a first sealing element; and / or, The bottom surface of the inner limiting ring is provided with a second sealing element.

[0014] Optionally, the telescopic cylinder further includes a plurality of intermediate cylinders, which are sequentially nested together. The inner wall of the top of each intermediate cylinder is provided with the inner limiting ring, and the outer wall of the bottom of each intermediate cylinder is provided with the outer limiting ring. The outer limiting ring of the inner intermediate cylinder in two adjacent intermediate cylinders can abut against the inner limiting ring of the outer intermediate cylinder. The outermost limiting ring of the outermost intermediate cylinder can abut against the inner limiting ring of the outer cylinder, and the innermost limiting ring of the innermost intermediate cylinder can abut against the outer limiting ring of the inner cylinder.

[0015] Optionally, the inner cylinder has a plurality of first connecting holes through it, and the plurality of first connecting holes are spaced apart along the circumference of the outer limiting ring. The inner wall of the outer cylinder has a plurality of second connecting holes. When the outer limiting ring of the inner cylinder abuts against the inner limiting ring of the outer cylinder, the plurality of first connecting holes correspond one-to-one with the plurality of second connecting holes, and the plurality of first fasteners can be respectively inserted through and connected to the corresponding first connecting holes and second connecting holes.

[0016] The beneficial effects of this invention are: The construction method for the pipeline-manhole connection structure provided by this invention includes the following steps: fabricating a precast pipe ring, on which a telescopic cylinder is installed, the axis of the telescopic cylinder being perpendicular to the axis of the precast pipe ring, the telescopic cylinder communicating with the inner cavity of the precast pipe ring, and a portion of the telescopic cylinder extending beyond the precast pipe ring; grouting below the manhole to form a reinforcement zone; and pushing the precast pipe ring to a preset connection position, the preset connection position being located within the reinforcement zone, with the telescopic cylinder facing the manhole. By pushing the precast pipe ring to the preset connection position, there is no need to transport it from the ground to the construction area, reducing the requirements for the ground construction site and facilitating construction in confined spaces; the reinforcement zone can reinforce the soil around the precast pipe ring, ensuring the structural strength of the soil during subsequent excavation, and providing a water-proof effect during construction, reducing safety hazards. A connection channel is formed by excavating downwards from the bottom of the manhole, the vertical projection of which covers the telescopic cylinder and a portion of the precast pipe ring around the telescopic cylinder. By excavating downwards at the bottom of the manhole, the main structure of the existing manhole is not damaged, and the impact on the deformation of surrounding structures is minimal. Furthermore, choosing an appropriate construction time (such as at night when traffic is light) can reduce the impact on surface traffic. A portion of the expansion joint is raised so that the top surface of the extended expansion joint is not lower than the bottom of the manhole, allowing for connection between the existing manhole and the new pipeline. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the excavation equipment provided in an embodiment of the present invention excavating downwards at the bottom of a manhole to form a connecting channel; Figure 2 This is a schematic diagram of the lifting equipment provided in an embodiment of the present invention lifting a portion of a telescopic cylinder a preset distance; Figure 3 This is a schematic diagram of the completed construction of the pipeline and manhole connection structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the prefabricated pipe ring provided in an embodiment of the present invention; Figure 5 This is a partial structural cross-sectional view of the prefabricated pipe ring provided in an embodiment of the present invention; Figure 6 This is an exploded view of the prefabricated pipe ring provided in an embodiment of the present invention; Figure 7 This is an exploded view of a portion of the structure of the prefabricated pipe ring provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the prefabricated tube ring and the extended telescopic cylinder provided in the embodiment of the present invention; Figure 9 yes Figure 8 A sectional view of the middle section of the structure; Figure 10 yes Figure 9 A magnified view of a section at point A in the middle; Figure 11 This is a schematic diagram of the structure of the intermediate cylinder provided in an embodiment of the present invention.

[0019] In the picture: 10. Inspection well; 101. Connecting passage; 20. Pipeline; 30. Precast pipe ring; 40. Reinforced area; 50. Concrete filling area; 60. Excavating equipment; 70. Lifting equipment; 80. Construction platform; 90. Lifting equipment; 1. Pipe segments; 2. Telescopic cylinder; 21. Inner cylinder; 211. Outer limiting ring; 212. First connecting hole; 213. Positioning ring; 214. First lifting point; 22. Outer cylinder; 221. Inner limiting ring; 222. Second connecting hole; 223. Abutment ring platform; 224. Fourth connecting hole; 23. Intermediate cylinder; 3. Top cover; 31. Cover body; 32. Connecting pipe body; 33. Third connecting hole; 34. Second lifting point; 41. First seal; 42. Second seal. Detailed Implementation

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] This embodiment provides a construction method for a pipeline-manhole connection structure. This construction method can achieve the connection between the newly built pipeline and the existing manhole, and can avoid damage to the existing manhole and surrounding structures, as well as reduce the impact on ground traffic.

[0030] like Figures 1-4 As shown, the construction method for the connection structure between the pipeline and the inspection well includes the following steps: Step 1: Fabricate a precast pipe ring 30. A telescopic cylinder 2 is provided on the precast pipe ring 30. The axial direction of the telescopic cylinder 2 is perpendicular to the axial direction of the precast pipe ring 30. The telescopic cylinder 2 is connected to the inner wall of the precast pipe ring 30 and communicates with the inner cavity of the precast pipe ring 30. A portion of the telescopic cylinder 2 can extend outside the precast pipe ring 30. In this embodiment, refer to... Figure 4 , Figure 6 and Figure 8 The prefabricated pipe ring 30 is formed by splicing together multiple arc-shaped pipe segments 1, one of which is equipped with a telescopic cylinder 2.

[0031] The second step involves grouting below the manhole 10 to form a reinforced zone 40. Specifically, this is achieved by drilling a hole in the ground and grouting with cement. The main function of the reinforced zone 40 is to form a waterproof layer, preventing most of the groundwater from seeping into the manhole 10 and the pipe 20 before an effective water-stopping structure is formed during the connection construction between the manhole 10 and the pipe 20. It also serves to reinforce the connection and improve the stability of the connection area.

[0032] The third step is to push the prefabricated pipe ring 30 to the preset connection position, which is located within the reinforced area 40, and to align the telescopic cylinder 2 with the inspection well 10. In this embodiment, as shown... Figure 1 , Figure 4 and Figure 5 As shown, the telescopic cylinder 2 and the pipe segment 1 are assembled in the working shaft of the newly built pipeline jacking construction to form the prefabricated pipe ring 30. The pipeline 20 is formed by the prefabricated pipe ring and multiple ordinary pipe rings connected in series. During pipe jacking construction, the pipe jacking equipment (such as a pipe jacking machine) at the front end excavates to open a channel, and at the starting shaft at the end, a new pipe ring is continuously connected to the end of the already jacked pipeline and pushed in the direction of excavation to form the pipeline 20. The prefabricated pipe ring 30 is connected as one of the pipe rings and pushed to the preset connection position. According to the design, when the prefabricated pipe ring 30 is pushed to the preset connection position, the pipe jacking equipment pushes to the receiving shaft position, and all other ordinary pipe rings are pushed to the design position to form the complete pipeline 20. Setting the preset connection position below the inspection shaft 10 makes it easy for the telescopic cylinder 2 to extend to connect with the inspection shaft 10. By pushing the prefabricated pipe ring 30 to the preset connection position, it is not necessary to transport it from the ground to the construction area, reducing the requirements for the ground construction site and facilitating construction in narrow areas.

[0033] Step 4: Excavate downwards from the bottom of inspection well 10 to form a connecting channel 101. The vertical projection of the connecting channel 101 covers the telescopic cylinder 2 and part of the prefabricated pipe ring 30 around the telescopic cylinder 2. (Refer to...) Figure 1 By excavating downwards from the bottom of the manhole 10, compared to the traditional method of vertically jacking upwards from within the newly constructed pipeline 20, the main structure of the existing manhole 10 is not damaged. The existing manhole 10 can still be used after construction, saving the cost of building a new manhole 10. Simultaneously, compared to the vertical jacking method, the strength design requirements for the jacking pipe ring at the construction location are lower, which also helps to reduce the deformation impact on surrounding structures. Furthermore, by choosing an appropriate construction time, such as working at night and sealing the manhole 10 during the day to restore ground traffic, the impact on urban ground traffic can be reduced compared to the open-cut method of closing the construction area. In this embodiment, excavation equipment 60 is used to excavate downwards from the bottom of the existing manhole 10. Exemplarily, the excavation equipment 60 is a rotary drilling rig.

[0034] Optionally, while excavating the connecting passage 101 in the third step, the residual soil within the connecting passage 101 should also be cleared. For example, manual clearing can be used to remove the residual soil within the connecting passage 101. Furthermore, the excavation work should be carried out at night, with surface traffic restored during the day to minimize the impact on surface traffic.

[0035] Fifth step: Lift a portion of the telescopic cylinder 2 so that the top surface of the extended telescopic cylinder 2 is not lower than the bottom of the inspection well 10, so that the original inspection well 10 and the newly built pipeline 20 can be connected through the telescopic cylinder 2.

[0036] Specifically, such as Figure 2 , Figure 8 and Figure 9 As shown, a portion of the telescopic cylinder 2 is lifted using the lifting equipment 70. In this embodiment, the telescopic cylinder 2 includes an inner cylinder 21 and an outer cylinder 22 coaxially arranged. The outer cylinder 22 is connected to the segment 1. The inner wall of the outer cylinder 22 is provided with an inner limiting ring 221, and the outer wall of the inner cylinder 21 is provided with an outer limiting ring 211. The inner cylinder 21 can move upward to extend beyond the outer cylinder 22, and the top surface of the outer limiting ring 211 can abut against the bottom surface of the inner limiting ring 221. When the inner cylinder 21 is lifted using the lifting equipment 70, the limit position of the extension of the inner cylinder 21 is when the outer limiting ring 211 abuts against the inner limiting ring 221. The top surface of the inner cylinder 21 is provided with a first lifting point 214, which cooperates with the hook of the lifting equipment to realize the lifting of the inner cylinder 21.

[0037] More specifically, such as Figures 8-10 As shown, the inner cylinder 21 has multiple first connecting holes 212 extending through it, and these holes are spaced apart circumferentially along the outer limiting ring 211. The inner wall of the outer cylinder 22 has multiple second connecting holes 222. When the outer limiting ring 211 of the inner cylinder 21 abuts against the inner limiting ring 221 of the outer cylinder 22, the multiple first connecting holes 212 correspond one-to-one with the multiple second connecting holes 222, and multiple first fasteners can pass through and connect to the corresponding first connecting holes 212 and second connecting holes 222. That is, when the inner cylinder 21 extends out of the outer cylinder 22, the first fasteners can fix the inner cylinder 21 and the outer cylinder 22, thereby maintaining the extended state of the telescopic cylinder 2. The multiple first fasteners can ensure uniform force distribution between the inner cylinder 21 and the outer cylinder 22 and improve connection reliability. For example, the first fastener can be a bolt.

[0038] More specifically, refer to Figure 8 , Figure 9 and Figure 11To adjust the telescopic height of the telescopic cylinder 2 to facilitate connection between pipes 20 and inspection wells 10 at different burial depths, the telescopic cylinder 2 also includes multiple intermediate cylinders 23. These intermediate cylinders 23 are nested sequentially. Each intermediate cylinder 23 has an inner limiting ring 221 on its top inner wall and an outer limiting ring 211 on its bottom outer wall. The outer limiting ring 211 of the inner intermediate cylinder 23 in two adjacent intermediate cylinders 23 abuts against the inner limiting ring 221 of the outer intermediate cylinder 23. The outermost intermediate cylinder 23's outer limiting ring 211 abuts against the inner limiting ring 221 of the outer cylinder 23, and the innermost intermediate cylinder 23's inner limiting ring 221 abuts against the outer limiting ring 211 of the inner cylinder 23. When the lifting device 70 lifts the inner cylinder 21 upwards, and the outer limiting ring 211 of the inner cylinder 21 abuts against the inner limiting ring 221 of the intermediate cylinder 23 adjacent to the inner cylinder 21, the inner cylinder 21 can no longer extend, thereby causing the intermediate cylinder 23 adjacent to the inner cylinder 21 to move upwards. Similarly, multiple intermediate cylinders 23 can be moved upwards in sequence until the outer limiting ring 211 of the intermediate cylinder 23 adjacent to the outer cylinder 22 abuts against the inner limiting ring 221 of the outer cylinder 22, completing the extension of the entire telescopic cylinder 2. The specific number of intermediate cylinders 23 inside the telescopic cylinder 2 can be set according to the actual situation, and this embodiment does not impose any restrictions.

[0039] Accordingly, such as Figure 11 As shown, the intermediate cylinder 23 has multiple first connecting holes 212 spaced apart from the outer limiting ring 211, and multiple second connecting holes 222 are also provided on the intermediate cylinder 23. When the inner cylinder 21 drives the multiple intermediate cylinders 23 to extend in sequence, in any two adjacent cylinders (inner cylinder 21 and intermediate cylinder 23, two adjacent intermediate cylinders 23, or intermediate cylinder 23 and outer cylinder 22), the multiple first connecting holes 212 of the inner cylinder correspond one-to-one with the multiple second connecting holes 222 of the outer cylinder, and the two adjacent cylinders can be fixedly connected by the first fastener.

[0040] As a preferred option, such as Figure 5 , Figure 7 and Figure 9 As shown, the inner wall of the bottom of the outer cylinder 22 is provided with an abutment ring 223. When the inner cylinder 21 and the multiple intermediate cylinders 23 are not extended from the outer cylinder 21, the bottoms of the inner cylinder 21 and the multiple intermediate cylinders 23 abut against the abutment ring 223. By providing the abutment ring 223, the cylinders inside the outer cylinder 22 can be supported and limited when the telescopic cylinder 2 is in the retracted state, preventing the cylinders inside the outer cylinder 22 from falling out of the outer cylinder 22.

[0041] Optionally, continue to refer to Figures 4-7The top surface of the inner cylinder 21 does not protrude from the outer wall of the segment 1. The precast pipe ring 30 is also equipped with a top cover 3, which is detachably installed over the top opening of the outer cylinder 22. The top cover 3 ensures the structural integrity of the precast pipe ring 30 and guarantees smooth pushing of the precast pipe ring 30. Furthermore, the top cover 3 prevents the telescopic cylinder 2 from failing to extend properly due to external soil entering the telescopic cylinder 2.

[0042] Specifically, the top cover 3 includes a cover body 31 and a connecting pipe body 32, with multiple third connecting holes 33 on the connecting pipe body 32. The outer cylinder 22 also has multiple fourth connecting holes 224. When the inner cylinder 21 is not extended from the outer cylinder 22, the cover body 31 can cover the top opening of the outer cylinder 22, and the connecting pipe body 32 can be inserted into the inner cylinder 21. The multiple third connecting holes 33 on the connecting pipe body 32, the multiple first connecting holes 212 on the inner cylinder 21, and the multiple fourth connecting holes 224 on the outer cylinder 22 correspond one-to-one. Multiple second fasteners can be sequentially inserted through and connected to the corresponding third connecting holes 33, first connecting holes 212, and fourth connecting holes 224. This arrangement allows for the relative fixation of the top cover 3, the inner cylinder 21, and the outer cylinder 22, ensuring that no relative rotation occurs between the components when the prefabricated pipe ring 30 is pushed. For example, the second fasteners can be bolts.

[0043] More specifically, a positioning ring 213 is also provided on the outer wall of the inner cylinder 21, and the positioning ring 213 is positioned higher than the outer limiting ring 211. When the inner cylinder 21 is located inside the outer cylinder 22, the bottom surface of the positioning ring 213 abuts against the top surface of the inner limiting ring 221. That is, the outer limiting ring 211 is used to limit the extension length of the inner cylinder 21, while the positioning ring 213 is used to limit the position of the inner cylinder 21 when it is not extended. The outer limiting ring 211 and the positioning ring 213 can respectively limit and fix the inner cylinder 21 on both sides in the axial direction, thereby preventing the inner cylinder 21 from separating from the outer cylinder 22. Correspondingly, a positioning ring 213 is also provided on the intermediate cylinder 23.

[0044] More specifically, to facilitate the lifting of the top cover 3, a second lifting point 34 is provided on the side of the cover 31 opposite to the connecting pipe 32. The second lifting point 34 cooperates with the hook of the lifting equipment 70 to achieve the lifting of the top cover 3.

[0045] Based on this, the fourth step, "lifting a portion of the telescopic cylinder 2," specifically includes: Lift the top cover 3 and remove it from the connecting channel 101; The inner cylinder 21 is lifted up so that the top surface of the outer limiting ring 211 abuts against the bottom surface of the inner limiting ring 221. Connect and fix the inner cylinder 21 and the outer cylinder 22.

[0046] Specifically, before “lifting the top cover 3 and removing it from the connecting channel 101”, the following steps should also be performed: A construction platform 80 is erected inside the newly built pipeline 20, and a lifting device 90 is installed. The second fastener fixing the top cover 3 is manually removed using the lifting device 90 to prepare for the removal of the top cover 3 and the lifting of the telescopic cylinder 2. This preparatory work can be carried out during the day.

[0047] More specifically, the top cover 3 is lifted and moved out using the lifting equipment 70. Then, the telescopic cylinder 2 is raised until the inner cylinder 21 and each intermediate cylinder 23 extend to the set position. Immediately afterward, the first fastener is manually screwed into the connection holes at the joints of each cylinder using the lifting equipment 90. After the first fastener is tightened, the lifting equipment 70 is removed and ground traffic is restored. This construction should be carried out at night.

[0048] Optionally, the construction method for the connection structure between the pipeline and the inspection well also includes: Step 6: Pour concrete between the inner wall of the connecting channel 101 and the outer wall of the telescopic cylinder 2 to form a concrete filling area 50. The upper surface of the concrete filling area 50 is flush with the top surface of the extended telescopic cylinder 2. By pouring concrete to fill the gap between the connecting channel 101 and the telescopic cylinder 2 to form the concrete filling area 50, the water-proofing effect of the telescopic cylinder 2 can be further improved. This construction should be carried out at night to minimize the impact on ground traffic.

[0049] This embodiment also provides a pipeline-manhole connection structure, which uses the construction method of the pipeline-manhole connection structure provided in this embodiment to connect the manhole and the pipeline.

[0050] Specifically, such as Figure 3 As shown, the connection structure between the pipeline and the manhole includes a precast pipe ring 30 and a telescopic cylinder 2. The precast pipe ring 30 is set at a predetermined connection position within the pipeline 20. A reinforcement zone 40 is provided around the precast pipe ring 30. One end of the telescopic cylinder 2 is connected to the precast pipe ring 30 and communicates with the pipeline 20. The other end of the telescopic cylinder 2 extends upward and communicates with the manhole 10. A concrete filling zone 50 formed by concrete pouring is provided around the telescopic cylinder 2. The telescopic cylinder 2 enables communication between the existing manhole 10 and the newly built pipeline 20. The reinforcement zone 40 can reinforce the soil around the precast pipe ring 30. The concrete filling zone 50 can improve the water-proofing effect of the telescopic cylinder 2. The precast pipe ring 30 includes multiple arc-shaped pipe segments 1, which are spliced ​​together to form the precast pipe ring 30. The telescopic cylinder 2 is set on one of the pipe segments 1.

[0051] More specifically, such as Figure 10As shown, to further ensure the water-proof effect of the telescopic cylinder 2, a first sealing element 41 is provided on the top surface of the outer limiting ring 211; and / or, a second sealing element 42 is provided on the bottom surface of the inner limiting ring 221. That is, when the telescopic cylinder 2 is in an extended state, a seal is formed at the connection point of any two adjacent cylinders of the telescopic cylinder 2 (inner cylinder 21 and intermediate cylinder 23, two adjacent intermediate cylinders 23, or intermediate cylinder 23 and outer cylinder 22) by the first sealing element 41 and / or the second sealing element 42, thus further improving the water-proof effect of the telescopic cylinder 2. In this embodiment, the top surface of the outer limiting ring 211 is provided with the first sealing element 41, and the bottom surface of the inner limiting ring 221 is provided with the second sealing element 42. Both the first sealing element 41 and the second sealing element 42 are annular serrated rubber waterstops. When the top surface of the outer limiting ring 211 abuts against the bottom surface of the inner limiting ring 221, the two rubber waterstops bite and press together, thereby blocking the seepage channels at the joints of the cylinders and achieving a water-stopping effect.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A construction method for the connection structure between pipelines and inspection wells, characterized in that, include: A precast pipe ring (30) is fabricated, and a telescopic cylinder (2) is provided on the precast pipe ring (30). The axial direction of the telescopic cylinder (2) is perpendicular to the axial direction of the precast pipe ring (30). The telescopic cylinder (2) is connected to the inner cavity of the precast pipe ring (30), and a part of the telescopic cylinder (2) can extend out of the precast pipe ring (30). Grouting is performed below the inspection well (10) to form a reinforced zone (40); The prefabricated pipe ring (30) is pushed to the preset connection position, which is located in the reinforcement area (40), and the telescopic cylinder (2) is oriented toward the inspection well (10). A connecting channel (101) is formed by excavating downwards at the bottom of the inspection well (10). The projection of the connecting channel (101) in the vertical direction covers the telescopic cylinder (2) and part of the prefabricated pipe ring (30) around the telescopic cylinder (2). A portion of the telescopic cylinder (2) is lifted so that the top surface of the extended telescopic cylinder (2) is not lower than the bottom of the inspection well (10).

2. The construction method for the pipeline-manhole connection structure according to claim 1, characterized in that, The telescopic cylinder (2) includes an inner cylinder (21) and an outer cylinder (22) arranged coaxially. The outer cylinder (22) is connected to the prefabricated pipe ring (30). The inner wall of the outer cylinder (22) is provided with an inner limiting ring (221), and the outer wall of the inner cylinder (21) is provided with an outer limiting ring (211). The inner cylinder (21) can move upward to extend out of the outer cylinder (22), and the top surface of the outer limiting ring (211) can abut against the bottom surface of the inner limiting ring (221).

3. The construction method for the pipeline-manhole connection structure according to claim 2, characterized in that, The top surface of the inner cylinder (21) does not protrude from the outer wall of the precast pipe ring (30). The precast pipe ring (30) is also provided with a top cover (3), which is detachably placed over the top opening of the outer cylinder (22).

4. The construction method for the pipeline-manhole connection structure according to claim 3, characterized in that, "Lifting a portion of the telescopic cylinder (2)" specifically includes: The top cover (3) is lifted and removed from the connecting channel (101); The inner cylinder (21) is lifted up so that the top surface of the outer limiting ring (211) abuts against the bottom surface of the inner limiting ring (221); The inner cylinder (21) and the outer cylinder (22) are connected and fixed.

5. The construction method for the pipeline-manhole connection structure according to any one of claims 1-4, characterized in that, The construction method for the connection structure between the pipeline and the inspection well also includes: Concrete is poured between the inner wall of the connecting channel (101) and the outer wall of the telescopic cylinder (2) to form a concrete filling area (50), the upper surface of the concrete filling area (50) being flush with the top surface of the extended telescopic cylinder (2).

6. A connection structure between a pipeline and a manhole, characterized in that, The connection between the manhole (10) and the pipe (20) is carried out using the construction method of the pipe and manhole connection structure as described in any one of claims 1-5. The pipe and manhole connection structure includes a precast pipe ring (30) and a telescopic cylinder (2). The precast pipe ring (30) is connected in series at a preset connection position in the pipe (20). The precast pipe ring (30) is provided with a reinforcement zone (40) in the circumferential direction. One end of the telescopic cylinder (2) is connected to the precast pipe ring (30) and communicates with the pipe (20). The other end of the telescopic cylinder (2) extends upward and communicates with the manhole (10).

7. The pipeline-manhole connection structure according to claim 6, characterized in that, The telescopic cylinder (2) includes an inner cylinder (21) and an outer cylinder (22) arranged coaxially. The outer cylinder (22) is connected to the prefabricated pipe ring (30). The inner wall of the outer cylinder (22) is provided with an inner limiting ring (221), and the outer wall of the inner cylinder (21) is provided with an outer limiting ring (211). The inner cylinder (21) can move upward and extend out of the outer cylinder (22). The top surface of the outer limiting ring (211) can abut against the bottom surface of the inner limiting ring (221).

8. The pipeline-manhole connection structure according to claim 7, characterized in that, The top surface of the outer limiting ring (211) is provided with a first sealing element (41); and / or, The bottom surface of the inner limiting ring (221) is provided with a second sealing element (42).

9. The pipeline-manhole connection structure according to claim 7, characterized in that, The telescopic cylinder (2) also includes a plurality of intermediate cylinders (23), which are sequentially nested together. The inner wall of the top of each intermediate cylinder (23) is provided with an inner limiting ring (221), and the outer wall of the bottom of each intermediate cylinder (23) is provided with an outer limiting ring (211). The outer limiting ring (211) of the inner intermediate cylinder (23) of two adjacent intermediate cylinders (23) can abut against the inner limiting ring (221) of the outer intermediate cylinder (23). The outermost limiting ring (211) of the outermost intermediate cylinder (23) among the plurality of intermediate cylinders (23) can abut against the inner limiting ring (221) of the outer cylinder (22), and the innermost limiting ring (221) of the innermost intermediate cylinder (23) among the plurality of intermediate cylinders (23) can abut against the outer limiting ring (211) of the inner cylinder (21).

10. The pipeline-manhole connection structure according to claim 7, characterized in that, The inner cylinder (21) is provided with a plurality of first connecting holes (212), which are spaced apart along the circumference of the outer limiting ring (211). The inner wall of the outer cylinder (22) is provided with a plurality of second connecting holes (222). When the outer limiting ring (211) of the inner cylinder (21) abuts against the inner limiting ring (221) of the outer cylinder (22), the plurality of first connecting holes (212) correspond one-to-one with the plurality of second connecting holes (222). The plurality of first fasteners can be respectively inserted and connected to the corresponding first connecting holes (212) and second connecting holes (222).

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