A well lid connecting structure and construction method

Abstract

The application provides a well lid connecting structure and a construction method. The well lid connecting structure comprises an upper locking assembly, a plurality of first frames, an elastic fitting part arranged in the first frames, a middle buffer assembly, a second frame and an elastic buffer part connected with each other, the plurality of first frames are connected with the second frame, and a lower extension assembly, a third frame connected with the second frame and a flexible anchor assembly used for fixing the third frame. The construction method of the application comprises the following steps: embedding an elastic sleeve in a well peripheral installation foundation; placing the second frame on the top of a well shaft through the elastic buffer part, the mounting hole of the third frame corresponds to the elastic sleeve, the anchor is connected with the third frame and penetrates into the elastic sleeve, and a sealing medium is filled between the elastic sleeve and the anchor; a plurality of first frames are spliced with each other to be embedded in the edge of a well lid, and the first frames are connected with the second frame after being spliced in place. The application has the beneficial effect of reducing the local pressure of the well shaft and prolonging the service life of the road.

Description

Technical Field

[0001] This invention belongs to the field of road inspection well construction technology, and in particular relates to a manhole cover connection structure and construction method. Background Technology

[0002] In existing technologies, manhole covers are rigidly installed on top of the manhole casing, lacking an effective transition connection between the cover and the surrounding foundation. Vehicle loads are transferred from the cover to the casing, leading to excessive local pressure on the casing and even premature settlement, causing damage to the casing perimeter and affecting traffic safety. This presents technical problems such as excessive local pressure on the casing, premature settlement, and damage to the casing perimeter. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a manhole cover connection structure and construction method, which is particularly suitable for the installation of manhole covers for road inspection wells.

[0004] The technical solution adopted in this invention is as follows: a manhole cover connection structure, including an upper locking assembly, which includes multiple first frames and elastic fittings disposed within the first frames, the multiple first frames being spliced ​​together and engaging with the outer edge of the manhole cover through the elastic fittings; a middle buffer assembly, which includes interconnected second frames and elastic buffers, the multiple first frames being connected to the second frames, the second frames being supported on the top of the manhole through the elastic buffers; and a lower extension assembly, which includes a third frame connected to the second frames, the third frame extending away from the manhole and connected to the manhole mounting foundation through a flexible anchoring assembly.

[0005] Preferably, the first frame includes a locking part and a transition connection part that are connected to each other. The locking part has a groove and an elastic fitting is provided in the groove. The transition connection part is connected to the second frame.

[0006] Preferably, the elastic fitting is a rubber sealing strip, which is laid along the length of the first frame.

[0007] Preferably, the middle buffer assembly further includes a constraint frame with a bottom opening, the constraint frame being connected to the inside of the second frame, the elastic buffer being housed within the constraint frame, and the lower part of the elastic buffer extending to the outside of the constraint frame to overlap the top of the wellbore.

[0008] Preferably, there are multiple elastic buffers, which are arranged at intervals along the circumference.

[0009] Preferably, the flexible anchoring assembly includes an anchor and an elastic sleeve pre-embedded in the well perimeter installation foundation. The anchor is connected to the third frame and passes through the elastic sleeve, and a sealing medium is filled between the anchor and the elastic sleeve.

[0010] Preferably, the third frame has mounting holes for the anchor to pass through.

[0011] Preferably, the present invention also provides a construction method for a manhole cover connection structure, comprising the following steps:

[0012] The elastic fitting is pre-connected to the corresponding first frame, and the elastic sleeve is pre-embedded in the well perimeter installation foundation.

[0013] The second frame is placed above the wellbore and erected on the top of the wellbore through the elastic buffer. The mounting holes of the third frame correspond to the elastic sleeve. The anchor is connected to the third frame and the anchor is inserted into the corresponding elastic sleeve. The space between the anchor and the elastic sleeve is filled with a sealing medium.

[0014] Multiple first frames are spliced ​​together to fit into the outer perimeter of the manhole cover. The first frames that are not pre-connected to the second frames are connected to the second frames after they are spliced ​​into place.

[0015] The advantages and positive effects of this invention are: by adopting the above technical solution, the rigid impact between the manhole cover and the installation foundation around the manhole can be reduced, and the local pressure on the manhole can be reduced; it also has the advantages of reducing the probability of premature settlement and extending the service life of the road. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of an embodiment of the present invention in a usage scenario;

[0017] Figure 2 This is a schematic diagram of the structure of the first frame in one embodiment of the present invention;

[0018] Figure 3 This is a three-dimensional schematic diagram of an embodiment of the present invention in a usage scenario;

[0019] Figure 4 This is a schematic diagram showing the connection between the elastic buffer and the second frame in one embodiment of the present invention;

[0020] In the picture:

[0021] 1. First frame; 2. Elastic fitting; 3. Second frame; 4. Elastic buffer; 5. Third frame; 6. Flexible anchoring assembly; 7. Well shaft; 8. Constraint frame; 11. Locking part; 12. Transition connection part. Detailed Implementation

[0022] The embodiments of the present invention will now be described with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar units or units having the same or similar functions throughout.

[0024] 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. In the description of the present invention, it should be understood that terms such as "installation," "connection," and "fixing" should be interpreted broadly, and can refer to direct connection, installation, or fixing, or indirect connection, installation, or fixing. The present invention does not impose any limitations in this regard.

[0025] like Figures 1 to 4 The diagram shows an embodiment of a manhole cover connection structure of the present invention, including an upper locking assembly comprising a plurality of first frames 1 and elastic fittings 2 disposed within the first frames 1, the plurality of first frames 1 being spliced ​​together and engaging with the outer edge of the manhole cover via the elastic fittings 2; a middle buffer assembly comprising a second frame 3 and an elastic buffer 4 connected to each other, the plurality of first frames 1 being connected to the second frame 3, the second frame 3 being supported on the top of the manhole casing 7 via the elastic buffer 4; and a lower extension assembly comprising a third frame 5 connected to the second frame 3, the third frame 5 extending away from the manhole casing 7 and being connected to the manhole mounting foundation via a flexible anchoring assembly 6.

[0026] Through the multi-layer combination of upper locking components, middle buffer components and lower extension components, the vehicle load borne by the manhole cover is buffered and attenuated by the elastic fitting 2, elastic buffer 4 and flexible anchoring components 6 and then distributed to the manhole 7 and the surrounding installation foundation, reducing the impact on the manhole and reducing the risk of premature settlement and damage to the manhole.

[0027] Preferably, the first frame 1 includes a locking part 11 and a transition connection part 12 connected to each other. The locking part 11 has a groove, and an elastic fitting 2 is disposed in the groove. The transition connection part 12 is connected to the second frame 3. The groove of the locking part 11 accommodates the elastic fitting 2, realizing elastic locking with the edge of the manhole cover. The transition connection part 12 is used to connect with the second frame 3, so that the upper locking assembly and the middle buffer assembly are connected as one unit to form a reliable force transmission path.

[0028] Preferably, the elastic fitting 2 is a rubber sealing strip, which is continuously laid along the length of the first frame 1. Using a rubber sealing strip laid along the entire length of the first frame 1 provides both a uniform elastic pre-tightening force to hold the manhole cover in place and a sealing and waterproofing function, reducing the shaking of the manhole cover.

[0029] Preferably, the middle layer buffer assembly further includes a constraint frame 8 with a bottom opening, the constraint frame 8 being connected inside the second frame 3, the elastic buffer 4 being housed within the constraint frame 8, and the lower part of the elastic buffer 4 extending outside the constraint frame 8 to overlap the top of the shaft 7. The constraint frame 8 with its bottom opening laterally limits the elastic buffer 4, effectively transmitting the buffering force vertically to the shaft 7, thus improving the stability and reliability of the buffering effect.

[0030] Preferably, there are multiple elastic buffers 4, which are arranged at intervals along the circumference. The arrangement of multiple elastic buffers 4 at intervals along the circumference ensures that the load transmitted by the manhole cover is evenly distributed along the circumference of the manhole 7, reducing local stress concentration and lowering the probability of the manhole 7 being damaged by pressure.

[0031] Preferably, the flexible anchoring component 6 includes an anchor and an elastic sleeve pre-embedded in the well perimeter installation foundation. The anchor is connected to the third frame 5 and passes through the elastic sleeve, with a sealing medium filling the space between the anchor and the elastic sleeve. The flexible anchoring component 6 can reduce the rigid contact between the well cover and the well perimeter installation foundation under horizontal loads, thus reducing damage to the well perimeter installation foundation.

[0032] Preferably, the third frame 5 has mounting holes for anchors to pass through. Having mounting holes in the third frame 5 provides a clear path for the anchors to pass through, facilitating rapid positioning and installation on the construction site and improving construction efficiency.

[0033] On the other hand, the present invention also provides a construction method for a manhole cover connection structure, comprising the following steps:

[0034] The elastic fitting 2 is pre-connected to the corresponding first frame 1, and the elastic sleeve is pre-embedded in the well perimeter installation foundation;

[0035] The second frame 3 is placed above the well barrel 7 and supported on the top of the well barrel 7 by the elastic buffer 4. The mounting hole of the third frame 5 corresponds to the elastic sleeve. The anchor is connected to the third frame 5 and the anchor is inserted into the corresponding elastic sleeve. The space between the anchor and the elastic sleeve is filled with a sealing medium.

[0036] Multiple first frames 1 are spliced ​​together to fit into the outer periphery of the manhole cover edge. Preferably, some of the first frames 1 are pre-set on the second frame 3, the edge of the manhole cover is embedded in the part of the first frame 1, and then the remaining first frames 1 are installed along the circumference of the manhole cover. The first frames 1 that are not pre-connected to the second frame 3 are connected to the second frame 3 after splicing and positioning.

[0037] Example 1:

[0038] The manhole cover connection structure includes an upper locking assembly, a middle buffer assembly, and a lower extension assembly.

[0039] The upper locking assembly includes two semi-circular first frames 1 (in other embodiments, it may also be three or more arc-shaped frames), and the two first frames 1 can be joined together along the circumference of the manhole cover to form a complete ring.

[0040] The first frame 1 is made of steel and includes a locking part 11 and a transition connection part 12 that are connected to each other.

[0041] The locking part 11 is C-shaped and has a groove with an opening facing the center of the manhole cover. An elastic fitting 2 is embedded in the groove. In this embodiment, the elastic fitting 2 is a rubber sealing strip. The rubber sealing strip is continuously laid in the groove along the length of the first frame 1. The sealing strip forms an elastic interference fit with the outer peripheral edge of the manhole cover, thereby elastically locking the manhole cover in the upper locking assembly.

[0042] The transition connection 12 is an L-shaped bent plate, which includes a vertical section and a horizontal section. The vertical section of the transition connection 12 is integrally connected to the locking part 11 and extends downward, while the horizontal section is perpendicular to the vertical section and extends horizontally away from the well shaft 7. The horizontal section has multiple bolt connection holes for connecting to the second frame 3 of the middle buffer assembly. In different embodiments, welding can also be used for connection.

[0043] The middle-layer buffer assembly is located below the upper-layer locking assembly. The middle-layer buffer assembly includes a second frame 3, a constraint frame 8, and an elastic buffer 4. The second frame 3 is a ring-shaped steel frame, which is connected to the transition connection 12 of the first frame 1.

[0044] The constraint frame 8 is a steel box with an open bottom, connected to the interior of the second frame 3. Multiple constraint frames 8 are evenly spaced along the circumference of the second frame 3. Each constraint frame 8 contains an elastic buffer 4 made of rubber, which can be attached to the constraint frame 8 by adhesive or other means. The upper part of the elastic buffer 4 is covered by the top and side walls of the constraint frame 8, and the lower part of the elastic buffer 4 extends from the bottom opening of the constraint frame 8 to the outside. The lower end face of the elastic buffer 4 elastically abuts against the top end face of the shaft 7. The circumferential side walls of the constraint frame 8 limit the lateral deformation of the elastic buffer 4 under pressure, allowing the elastic buffering force to be transmitted vertically to the shaft 7.

[0045] The lower extension assembly is located below the middle buffer assembly. The lower extension assembly includes a third frame 5 and a flexible anchoring assembly 6.

[0046] The third frame 5 is fixedly connected to the second frame 3, and its outer edge extends radially outward along the well shaft 7 to form a load-distribution surface. The third frame 5 is used to connect with the well perimeter mounting foundation. The third frame 5 has multiple vertically penetrating mounting holes spaced apart circumferentially.

[0047] The flexible anchoring component 6 includes an anchor and an elastic sleeve. The elastic sleeve is a PVC sleeve (other plastic sleeves with a certain degree of elasticity can also be used), which is pre-embedded in the installation foundation around the manhole during road construction. Its position is designed according to the preset installation position of the third frame 5, so that after the third frame 5 is installed, the mounting hole on it corresponds to the elastic sleeve. The anchor passes through the mounting hole of the third frame 5 and connects to the third frame 5, and the lower end of the anchor passes into the corresponding elastic sleeve.

[0048] A gap is left between the outer wall of the anchor and the inner wall of the elastic sleeve, and this gap is filled with a sealing medium. In this embodiment, the sealing medium is sealant. The filling method is as follows: before the anchor is inserted into the elastic sleeve, sealant is pre-injected into the inner wall of the elastic sleeve, and then the anchor is inserted into place. The cured sealant layer forms a flexible connection between the anchor and the elastic sleeve. When the third frame 5 is subjected to horizontal force, the anchor can undergo a slight displacement relative to the elastic sleeve under the protection of the sealant layer, thereby reducing damage to the wellbore mounting foundation.

[0049] The anchor and the third frame 5 can be connected by a conventional threaded connection, for example, the mounting hole of the third frame 5 is provided with an internal thread structure that is compatible with the anchor (anchor screw).

[0050] In a construction scenario:

[0051] Before construction, a corresponding number of first frames 1 are prefabricated according to the size and shape of the manhole cover, and the elastic fitting 2 is pre-embedded in the groove of the first frame 1. At the same time, according to the design position, the elastic sleeve is pre-embedded in the foundation around the manhole and the positioning mark is made.

[0052] During construction, the third frame 5 is placed on the well perimeter mounting base, and the second frame 3 is placed above the well casing 7, so that the lower end face of the elastic buffer 4 rests on the top end face of the well casing 7. The position of the third frame 5 is adjusted so that its mounting hole corresponds to the position of the elastic sleeve. Sealant is injected into the inner wall of the elastic sleeve, and the anchor is passed through the mounting hole and inserted into the elastic sleeve. The anchor is connected to the third frame 5 through a threaded structure.

[0053] When installing the upper locking assembly, a portion of the first frame 1 is pre-connected to the second frame 3, with the groove opening of this portion of the first frame 1 facing the center of the manhole 7. Then, the outer peripheral edge of the manhole cover is embedded into the groove of this portion of the first frame 1, allowing the elastic fitting 2 to elastically abut against the edge of the manhole cover. The remaining first frame 1 is then installed sequentially along the circumference of the manhole cover, so that all the first frame 1 form a complete ring, completely covering the outer perimeter of the manhole cover. All first frame 1s not connected to the second frame 3 are fixedly connected to the second frame 3 through the transition connection part 12, which can be achieved by bolt connection or welding. Thus, the manhole cover achieves a flexible transition connection with the manhole 7 and the surrounding installation foundation through the elastic fitting of the upper locking assembly, the elastic buffering of the middle buffer assembly, and the flexible anchoring of the lower extension assembly.

[0054] Understandably, the second frame 3 and the third frame 5 can be pre-welded together in the factory and installed as a whole, depending on the actual construction conditions, or they can be positioned separately on site and then fixed together by bolts or welding. The connection method between the first frame 1 and the second frame 3 can also be flexibly chosen; some of the first frame 1 can be pre-connected to the second frame 3, or all of the first frame 1 can be connected to the second frame 3 sequentially after the manhole cover is in place. The fixing and connection methods between the above-mentioned components, including bolt connections, welding, threaded connections, etc., are all conventional technical means in this field, and those skilled in the art can flexibly choose according to the site conditions and the degree of prefabrication, which will not be elaborated here.

[0055] This invention uses a multi-flexible buffer structure (upper layer elastic interlocking, middle layer elastic buffering, and lower layer flexible anchoring) to gradually attenuate the load on the manhole cover and distribute it to the manhole casing 7 and the surrounding installation foundation. The third frame 5 extends outward to increase the diffusion area, reduce rigid contact and stress concentration, and reduce the probability of damage to the manhole casing 7 and settlement of the manhole cover. All components are made of conventional materials and simple processes, making on-site installation convenient and effectively extending the service life of the inspection well.

[0056] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made in accordance with the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A manhole cover connection structure, characterized in that, include: The upper locking assembly includes multiple first frames and elastic fittings disposed within the first frames. The multiple first frames are spliced ​​together and engaged with the outer edge of the manhole cover through the elastic fittings. The middle layer buffer assembly includes interconnected second frames and elastic buffer members, with multiple first frames connected to the second frames, and the second frames being erected on the top of the well shaft via the elastic buffer members; The lower extension assembly includes a third frame connected to the second frame, the third frame extending in a direction away from the wellbore and connected to the wellbore mounting foundation via a flexible anchoring assembly.

2. The manhole cover connection structure according to claim 1, characterized in that, The first frame includes a locking part and a transition connection part that are connected to each other. The locking part has a groove and an elastic fitting is provided in the groove. The transition connection part is connected to the second frame.

3. The manhole cover connection structure according to claim 1, characterized in that, The elastic fitting is a rubber sealing strip, which is laid along the length of the first frame.

4. The manhole cover connection structure according to claim 1, characterized in that, The middle buffer assembly also includes a constraint frame with a bottom opening, the constraint frame being connected to the interior of the second frame, the elastic buffer being housed within the constraint frame, and the lower part of the elastic buffer extending to the outside of the constraint frame to overlap the top of the wellbore.

5. The manhole cover connection structure according to claim 1, characterized in that, The number of elastic buffers is multiple, and the multiple elastic buffers are arranged at intervals along the circumference.

6. The manhole cover connection structure according to any one of claims 1-5, characterized in that, The flexible anchoring assembly includes an anchor and an elastic sleeve pre-embedded in the well perimeter installation foundation. The anchor is connected to the third frame and passes through the elastic sleeve. A sealing medium is filled between the anchor and the elastic sleeve.

7. The manhole cover connection structure according to claim 6, characterized in that, The third frame has mounting holes through which the anchors pass.

8. A construction method for a manhole cover connection structure, used in the manhole cover connection structure according to any one of claims 1-7, characterized in that, Includes the following steps: The elastic fitting is pre-connected to the corresponding first frame, and the elastic sleeve is pre-embedded in the well perimeter installation foundation. The second frame is placed above the well shaft and supported on the top of the well shaft by the elastic buffer. The mounting hole of the third frame corresponds to the elastic sleeve. The anchor is connected to the third frame and the anchor is inserted into the corresponding elastic sleeve. A sealing medium is filled between the anchor and the elastic sleeve. Multiple first frames are spliced ​​together to fit into the outer periphery of the manhole cover edge. First frames that are not pre-connected to second frames are connected to second frames after being spliced ​​into place.

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