Double-layer well lid for retaining original well lid in renewal and reconstruction and construction method thereof

Abstract

The double-layer well lid comprises a lower-layer well lid body, a middle-layer partition and an upper-layer well lid body, the lower-layer well lid body is the original well lid body, and the middle-layer partition comprises a galvanized square pipe outer frame surrounding to form a rectangular structure and a galvanized square pipe inner frame longitudinally and / or transversely laid in the galvanized square pipe outer frame. The middle-layer partition completely covers the surface of the lower-layer well lid on the orthographic projection plane, and the upper-layer well lid completely covers the middle-layer partition on the orthographic projection plane; the upper-layer well lid body sequentially comprises a stainless steel cover plate, marble glue and surface layer stone from bottom to top, a reserved hole is formed in the surface of the upper-layer well lid body, and a stainless steel reserved hook piece penetrating through the surface layer stone and the marble glue is installed on the reserved hole and provided with the end abutting against the upper surface of the stainless steel cover plate. According to the double-layer well lid structure, the middle-layer partition and the upper-layer well lid are spliced according to on-site conditions, so that inner and outer splicing seams of the well lid are consistent, the well lid is in dense contact with an original well lid, and the installation stability of the well lid is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of urban landscape, and in particular to a double-layer manhole cover for retaining an original manhole cover during renovation and a construction method thereof. Background Art

[0002] Urban renewal is an indispensable part of modern urban development. It aims to adapt to social needs and environmental changes by improving urban infrastructure, enhancing the quality of public spaces and increasing urban functions. Among them, landscape transformation structure, as an important part of urban renewal, has important background and significance. In the reconstruction of old roads, it is necessary to raise the manhole covers of inspection wells or valve wells at the same time. In general, the construction requires the removal of the manhole covers of inspection wells or valve wells and the shafts below them, and then the shafts are raised with bricks or concrete, and finally the removed manhole covers are installed back. This method has many problems, such as long construction period, construction pollution caused by the removal and construction of building materials, and potential safety hazards caused by the removed manhole covers.

[0003] The existing patent publication number CN112627237A discloses a manhole or valve well cover heightening device that is convenient for road upgrading and reconstruction. The frame and filling blocks are prefabricated in advance according to the roadbed elevation, road elevation and the size of the existing manhole shaft after reconstruction. After the existing road is broken up during the reconstruction of the old road, before the construction of the pavement structure layer, the frame is placed outside the existing manhole or valve well shaft, and the prefabricated filling blocks are placed inside. Then the pavement structure layer is laid along the entire road (avoiding the manhole or valve well cover position). This technology is designed to heighten the original manhole cover, but the heightening device is a prefabricated structure, and the heightening device cannot be spliced ​​on site according to the actual manhole cover situation. Therefore, there is a large joint between the inside and outside of the manhole cover, and the applicability is poor. Summary of the invention

[0004] In view of the shortcomings and deficiencies of the prior art, the present invention aims to provide a double-layer manhole cover for retaining the original manhole cover during renovation and a method for constructing the double-layer manhole cover.

[0005] The specific technical solutions of the present invention are as follows:

[0006] The present invention provides a double-layer manhole cover for retaining the original manhole cover during renovation, the double-layer manhole cover comprising a lower manhole cover, a middle partition and an upper manhole cover, the lower manhole cover being the original manhole cover, the middle partition comprising a galvanized square tube outer frame surrounding a rectangular structure and a galvanized square tube inner frame longitudinally and / or transversely laid in the galvanized square tube outer frame, the middle partition completely covers the surface of the lower manhole cover on the orthographic projection plane, and the upper manhole cover completely covers the middle partition on the orthographic projection plane; the upper manhole cover comprises, from bottom to top, a stainless steel cover plate, marble glue and a surface stone material, a reserved hole is provided on the surface of the upper manhole cover, a stainless steel hook member penetrating the surface stone material and the marble glue and with an end against the upper surface of the stainless steel cover plate is installed on the reserved hole.

[0007] Preferably, the edge of the stainless steel cover plate extends upward and is provided with a frame strip that completely wraps the side of the marble glue, and the outer side of the edge corner of the stainless steel cover plate is provided with a thick angle steel; the thick angle steel does not conflict with the middle partition or the inner side of the thick angle steel conflicts with the outer wall surface of the middle partition.

[0008] Preferably, a plurality of fixing members of hook structure are installed at the corner positions of the outer side wall of the thick angle steel, and the hook ends of the fixing members are arranged to face outward and tilt downward.

[0009] Preferably, the stainless steel hook member is arranged at a diagonal position on the surface of the upper manhole cover, and the stainless steel hook member is provided with a hook hole along its central axis. A hook plate is provided on the top surface of the hook hole. The hook plate includes a circular hole in the middle and a long hole dug outward from the circular hole along the diameter direction, and the circular hole and the long hole are both connected to the hook hole.

[0010] The second aspect of the present invention discloses a method for constructing a double-layer manhole cover for use in the above-mentioned renovation and reconstruction in order to retain the original manhole cover, the method comprising:

[0011] S1. Remove the old road and keep the original manhole frame on the side of the manhole cover;

[0012] S2. Cover the middle partition just above the original manhole cover, lay the first cement-stabilized gravel layer above the roadbed, and when laying to the top, insert the fixing member of the thick angle steel downward into the first cement-stabilized gravel layer, so that the upper horizontal surface of the thick angle steel is flush with the upper surface of the middle partition to form a frame for placing the upper manhole cover, and compact and level the first stable gravel layer;

[0013] S3. Before the first cement-stabilized crushed stone layer begins to solidify, the middle partition is raised. After the first cement-stabilized crushed stone layer is completely solidified, the second stable crushed stone layer is laid on the outside of the thick angle steel frame. The laying height is flush with the upper end of the thick angle steel, and it is compacted and leveled.

[0014] S4. After the second cement-stabilized gravel layer is completely solidified, the middle partition and the upper manhole cover are covered on top of the original manhole cover;

[0015] S5. Lay a cement mortar layer on top of the second cement-stabilized crushed stone layer, with the paving height flush with the upper surface of the frame strip of the stainless steel cover plate, and tamp and level it;

[0016] S6. Before the cement mortar layer begins to set, use a hook tool to lift the upper manhole cover through the stainless steel hook piece;

[0017] S7. After the cement mortar layer is completely solidified, the upper manhole cover is re-covered on top of the original manhole cover, and then the stone is flatly paved on the upper surface of the cement mortar layer.

[0018] Preferably, the frame of the middle partition and the stainless steel cover plate of the upper manhole cover can be cut and spliced ​​at the construction site, and after the stainless steel cover plate is manufactured, marble glue and surface stone are laid on it in sequence;

[0019] The inner side of the thick angle steel toward the middle partition just contacts the outer wall surface of the galvanized square tube outer frame of the middle partition.

[0020] Based on the above invention principle, the beneficial effects of the present invention are as follows:

[0021] In order to retain the double-layer manhole cover structure of the original manhole cover during the renovation of the present invention, after the road renovation is completed, when it is necessary to open the double-layer manhole cover of the inspection well, a conventional manhole cover prying tool is used to first remove the upper manhole cover through the stainless steel hook piece, and then the middle partition is lifted out to expose the original manhole cover, and the original manhole cover can be further opened for inspection.

[0022] The method of the present invention is used for all double-layer manhole covers on hard ground, and it is in close contact with the original manhole cover. The method of the present invention successfully solves many problems of conventional construction methods, such as long construction period, easy to cause construction waste to fall into the well, easy to cause dust when removing and laying building materials, and easy to cause safety hazards when removing manhole covers. In addition, the method is formulated according to the actual situation on site to splice the middle partition and the upper manhole cover, so that the inner and outer joints of the manhole cover are consistent, and the contact is close with the original manhole cover, thereby improving the stability of the manhole cover installation; at the same time, the double-layer manhole cover structure of the present invention makes its construction process more reasonable and simple, and has the characteristics of improving work efficiency and reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an axonometric diagram of an implementation method of a double-layer manhole cover in order to retain the original manhole cover during the renovation of the present invention;

[0024] Figure 2 A top view of another embodiment of a double-layer manhole cover in order to retain the original manhole cover during renovation of the present invention;

[0025] Figure 3 for Figure 2 A cross-sectional view of the structure of part II;

[0026] Figure 4 It is a structural schematic diagram of the stainless steel hook retaining member of the present invention;

[0027] Figure 5 The present invention is a flowchart of a method for constructing a double-layer manhole cover. DETAILED DESCRIPTION

[0028] The following examples further illustrate the content of the present invention, but should not be construed as limiting the present invention. Without departing from the spirit and substance of the present invention, modifications or substitutions made to the methods, steps or conditions of the present invention all fall within the scope of the present invention.

[0029] In order to retain the double-layer manhole cover of the original manhole cover during the renovation of the present invention, Figure 1 As shown, the double-layer manhole cover includes a lower manhole cover 1, a middle partition 2 and an upper manhole cover 3. The structure is mainly designed corresponding to the original rectangular or square manhole cover. The lower manhole cover 1 is the original manhole cover, and the middle partition 2 includes a galvanized square tube outer frame 20 surrounded by a rectangular structure and a galvanized square tube inner frame 21 longitudinally and / or transversely laid inside the galvanized square tube outer frame 20. The longitudinal and / or transverse here include only longitudinal or transverse, crisscrossing, and are set according to the actual size of the manhole cover, such as Figure 1 The picture shows a crisscross pattern. Figure 2 The figure is only in the longitudinal direction; the number of galvanized square tubes in the longitudinal and transverse directions of the galvanized square tube inner frame is also laid according to the size of the manhole cover, which can be directly set according to the size of the original manhole cover during construction. The middle partition 2 completely covers the surface of the lower manhole cover 1 on the orthographic projection surface, and the upper manhole cover 3 completely covers the middle partition 2 on the orthographic projection surface.

[0030] The upper manhole cover 3 includes a stainless steel cover plate 31, marble glue 32 and a surface stone 33 from bottom to top. A reserved hole is provided on the surface of the upper manhole cover 3. A stainless steel hook 14 is installed on the reserved hole, which penetrates the surface stone 33 and the marble glue 32 and the end of which is against the upper surface of the stainless steel cover plate 31.

[0031] Figure 2-3 In another example shown, the edge of the stainless steel cover plate 31 extends upward to form a frame strip 34 that completely wraps the side of the marble glue 32, and the outer side of the edge corner of the stainless steel cover plate 31 is provided with a thick angle steel 4; the thick angle steel 4 does not conflict with the middle partition 2 or the inner side of the thick angle steel 4 conflicts with the outer wall surface of the middle partition 2. The structure of the manhole cover frame can be reinforced by the structural setting of the thick angle steel.

[0032] Several fixing members 41 of hook structure are installed at the corner positions of the outer wall of the thick angle steel 4. The number of the fixing hooks 41 is set according to the actual length and width of the manhole cover. The fixing members 41 are evenly spaced. The distance between the fixing member 41 at the edge and the end of the edge is relatively small, preferably 50 mm. The hook is a hook with a bent hook structure at the end. The hook end of the fixing member 41 is tilted outward and downward. The bent hook is embedded in the road surface structure, and the overall structure is more stable.

[0033] The stainless steel hook retaining member 14 is arranged at a diagonal position on the surface of the upper manhole cover 3, and the stainless steel hook retaining member 14 is provided with a hook retaining hole 15 along its central axis, and a hook plate 16 is provided on the top surface of the retaining hole 15. Figure 4 As shown, the hook plate 16 includes a circular hole 17 in the middle and a long hole 18 excavated outward from the circular hole 17 along the diameter direction. The diameter of the circular hole 17 is smaller than the diameter of the hole for retaining the structure 15. The circular hole 17 and the long hole 18 are both connected to the hole for retaining the hook 15. The circular hole and the long hole form a structure hole on the hook plate. When in use, the hook body is inserted into the structure hole to install and remove the upper cover plate.

[0034] The structure and size of the stainless steel hook and its holes as well as the installation position on the upper manhole cover can be set according to actual conditions. In some examples, the height of the stainless steel hook 14 is 60mm, the thickness is 8-10mm, and the outer diameter is 25mm; the diameter of the round hole 17 is 10mm, the length of the long hole 18 is 10mm and the width is 5mm, and the length of the round hole 17 between the two long holes 18 is 15mm. The distance from the center of the stainless steel hook 14 to the side of the upper manhole cover is 100-120mm, preferably 110mm.

[0035] In the parallel direction, the center distance between adjacent galvanized square tubes of the galvanized square tube inner frame 21 is 180-220 mm, preferably 200 mm; the thickness of the galvanized square tube is 3-4 mm, and the length of each side of the square of the cross section of the galvanized square tube is 50 mm.

[0036] The length of the fixing member 41 is 120-150 mm, preferably 150 mm. The cross-sectional diameter of the fixing member 41 is 6-10 mm, preferably 8 mm. The thickness of the thick angle steel 4 is 5 mm, and the length and width are set according to the position of the corresponding middle partition during actual installation. In some examples, the values ​​are 30-60 mm.

[0037] The thickness of each layer of the upper manhole cover 3 of the present invention is set according to actual conditions. In a specific example, the thickness of the stainless steel cover plate 31 is 5 mm, the thickness of the marble glue 32 is 30 mm, and the thickness of the surface stone 33 is 30 mm. The surface stone 33 can be selected according to existing conventional materials.

[0038] The second aspect of the present invention is based on the construction method of the double-layer manhole cover in order to retain the original manhole cover in the above-mentioned renovation. Figure 5 As shown, the method includes

[0039] S1. Remove the old road and retain the well frame on the side of the original well cover; the well frame here is the well shaft edge of the original well cover, and the well shaft edge can completely cover the middle layer partition on the orthographic projection surface.

[0040] S2. Cover the middle partition just above the original manhole cover, lay the first cement-stabilized gravel layer above the road base, and when laying to the top, insert the fixing components of the thick angle steel downward into the first cement-stabilized gravel layer. The upper horizontal surface of the thick angle steel is flush with the upper surface of the middle partition to form a frame for placing the upper manhole cover, and compact and level the first stable gravel layer.

[0041] S3. Before the first cement-stabilized gravel layer begins to solidify, the middle partition is raised. After the first cement-stabilized gravel layer is completely solidified, the second stabilized gravel layer is laid on the outside of the thick angle steel frame. The laying height should be flush with the upper end of the thick angle steel, and it should be compacted and leveled.

[0042] S4. After the second cement-stabilized gravel layer is completely solidified, the middle partition and the upper manhole cover are covered on top of the original manhole cover.

[0043] S5. Lay a cement mortar layer on top of the second cement-stabilized gravel layer. The paving height should be flush with the upper surface of the frame strip of the stainless steel cover plate, and then compact and level it.

[0044] S6. Before the cement mortar layer begins to set, use a hook tool to lift the upper manhole cover through the stainless steel hook piece.

[0045] S7. After the cement mortar layer is completely solidified, the upper manhole cover is re-covered on top of the original manhole cover, and then the stone is flatly paved on the upper surface of the cement mortar layer.

[0046] The frame of the middle partition and the stainless steel cover of the upper manhole cover can be cut and spliced ​​on the construction site. After the stainless steel cover is manufactured, marble glue and surface stone are laid on it in sequence. The method of the present invention is to prepare a method for the middle partition and the upper manhole cover by splicing them on site, so that the inner and outer joints of the manhole cover are consistent.

[0047] Among them, the inner side of the thick angle steel toward the middle partition just touches the outer wall surface of the galvanized square tube outer frame of the middle partition, which not only strengthens the manhole cover frame but also makes the laying of each layer of the road surface simpler, greatly improving the construction speed.

[0048] When the road reconstruction is completed and the double-layer manhole cover of the inspection well needs to be opened, a conventional manhole cover prying tool is used to first remove the upper manhole cover through the stainless steel hook, and then the middle partition is lifted out to expose the original manhole cover, and the original manhole cover can be further opened for inspection.

[0049] The method of the present invention is used for all double-layer manhole covers on hard ground, and the manhole covers are in close contact with the original manhole covers. The method of the present invention successfully solves many problems of conventional construction methods, such as long construction period, dust easily caused by dismantling and laying building materials, and potential safety hazards caused by dismantled manhole covers, and has the characteristics of improving work efficiency and reducing construction costs.

[0050] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A double-layer manhole cover for retaining the original manhole cover during renovation, characterized in that: The double-layer manhole cover includes a lower manhole cover, a middle partition and an upper manhole cover, wherein the lower manhole cover is the original manhole cover, the middle partition includes a galvanized square tube outer frame formed into a rectangular structure and a galvanized square tube inner frame longitudinally and / or transversely laid in the galvanized square tube outer frame, the middle partition completely covers the surface of the lower manhole cover on the orthographic projection plane, and the upper manhole cover completely covers the middle partition on the orthographic projection plane; the upper manhole cover includes a stainless steel cover plate, marble glue and surface stone from bottom to top, and a reserved hole is provided on the surface of the upper manhole cover, and a stainless steel hook is installed on the reserved hole, which penetrates the surface stone and the marble glue and the end of which is against the upper surface of the stainless steel cover plate.

2. The double-layer manhole cover for retaining the original manhole cover in the renovation as claimed in claim 1 is characterized in that: The edge of the stainless steel cover plate extends upward to form a frame strip that completely wraps the side of the marble glue, and the outer side of the edge corner of the stainless steel cover plate is provided with a thick angle steel; the thick angle steel does not conflict with the middle partition or the inner side of the thick angle steel conflicts with the outer wall surface of the middle partition.

3. The double-layer manhole cover for retaining the original manhole cover in the renovation as claimed in claim 2 is characterized in that: A plurality of fixing components with hook structures are installed at the corner positions of the outer side wall of the thick angle steel, and the hook ends of the fixing components are arranged to face outwards and tilt downwards.

4. The double-layer manhole cover for retaining the original manhole cover in the renovation as claimed in claim 1 is characterized in that: The stainless steel hook-retaining member is arranged at a diagonal position on the surface of the upper manhole cover, and the stainless steel hook-retaining member is provided with a hook hole along its central axis, and a hook plate is provided on the top surface of the hook hole. The hook plate includes a circular hole in the middle and a long strip hole dug outward from the circular hole along the diameter direction, and the circular hole and the long strip hole are both connected to the hook hole.

5. The double-layer manhole cover for retaining the original manhole cover in the renovation as claimed in claim 4 is characterized in that: The height of the stainless steel hook member is 60 mm, the thickness is 8-10 mm, and the outer diameter is 25 mm; the distance from the center of the stainless steel hook member to the side of the upper manhole cover is 100-120 mm.

6. The double-layer manhole cover for retaining the original manhole cover in the renovation as claimed in claim 1 is characterized in that: In the parallel direction, the center distance between adjacent galvanized square tubes of the galvanized square tube inner frame is 180-220 mm; the thickness of the galvanized square tube is 3-4 mm, and the length of each side of the square of the cross section of the galvanized square tube is 50 mm.

7. The double-layer manhole cover for retaining the original manhole cover in the renovation as claimed in claim 3 is characterized in that: The length of the fixing member is 120-150 mm, and the cross-sectional diameter of the fixing member is 6-10 mm; the thickness of the thick angle steel is 5 mm, and the length and width are both 30-60 mm.

8. The double-layer manhole cover for retaining the original manhole cover in the renovation as claimed in claim 1 is characterized in that: The thickness of the stainless steel cover plate is 4-6 mm, the thickness of the marble glue is 30 mm, and the thickness of the surface stone is 30 mm.

9. A method for constructing a double-layer manhole cover for retaining the original manhole cover in the renovation of claim 1, the method comprising: S1. Remove the old road and keep the original manhole frame on the side of the manhole cover; S2. Cover the middle partition just above the original manhole cover, lay the first cement-stabilized gravel layer above the roadbed, and when laying to the top, insert the fixing member of the thick angle steel downward into the first cement-stabilized gravel layer, so that the upper horizontal surface of the thick angle steel is flush with the upper surface of the middle partition to form a frame for placing the upper manhole cover, and compact and level the first stable gravel layer; S3. Before the first cement-stabilized crushed stone layer begins to solidify, the middle partition is raised. After the first cement-stabilized crushed stone layer is completely solidified, the second stable crushed stone layer is laid on the outside of the thick angle steel frame. The laying height is flush with the upper end of the thick angle steel, and it is compacted and leveled. S4. After the second cement-stabilized gravel layer is completely solidified, the middle partition and the upper manhole cover are covered on top of the original manhole cover; S5. Lay a cement mortar layer on top of the second cement-stabilized crushed stone layer, with the paving height flush with the upper surface of the frame strip of the stainless steel cover plate, and tamp and level it; S6. Before the cement mortar layer begins to set, use a hook tool to lift the upper manhole cover through the stainless steel hook piece; S7. After the cement mortar layer is completely solidified, the upper manhole cover is re-covered on top of the original manhole cover, and then the stone is flatly paved on the upper surface of the cement mortar layer.

10. The method for constructing a double-layer manhole cover according to claim 9, characterized in that: The frame of the middle partition and the stainless steel cover of the upper manhole cover can be cut and spliced ​​at the construction site. After the stainless steel cover is made, marble glue and surface stone are laid on it in sequence; The inner side of the thick angle steel toward the middle partition just contacts the outer wall surface of the galvanized square tube outer frame of the middle partition.

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