Well lid, well lid construction auxiliary device and construction method

Abstract

The invention provides a well lid, a well lid construction auxiliary device and a construction method, and relates to the technical field of well lid construction.The well lid comprises a cover plate and a seat ring, the cover plate is connected with the seat ring, and the seat ring is used for being pre-buried in a concrete layer; the seat ring comprises a base and a supporting piece, the base is provided with a center hole used for being aligned with a well mouth, the inner side wall of the base is provided with a first protrusion, and the first protrusion is used for supporting the cover plate. The supporting piece is connected with the base, the supporting piece is used for being embedded in a concrete layer, and when the concrete layer is poured, the supporting piece is perpendicular to the mortar layer. A first bulge on the inner side wall of the base disperses the load of the cover plate to the circumferential direction of the base through a three-point supporting principle; the supporting piece is perpendicular to the mortar layer, so that a vertical anchoring structure similar to an anchor bolt is formed, when the vehicle load generates horizontal component force, part of horizontal load is converted into pressure stress on concrete through the supporting piece, displacement is resisted, and the risk that the well lid moves in the downhill direction is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of manhole cover construction, and in particular to a manhole cover, a manhole cover construction auxiliary device and a construction method. Background Art

[0002] On an inclined road, the gravity of a heavy object is decomposed into a force along the slope and a normal force perpendicular to the road surface. Due to the inclination of the road surface, the force along the slope will cause the manhole cover to be subjected to greater lateral pressure, causing it to move downhill. A displaced manhole cover will not only cause an uneven road surface, requiring vehicles to slow down and avoid it, reducing road traffic efficiency, but may also expose the manhole opening, forming a "trap", causing traffic accidents or pedestrians to fall. Summary of the invention

[0003] The purpose of the present invention is to provide a manhole cover, a manhole cover construction auxiliary device and a construction method, and the technical problem to be solved is how to reduce the risk of the manhole cover moving in a downhill direction.

[0004] The present invention is achieved through the following technical solutions:

[0005] A first aspect provides a manhole cover, comprising a cover plate and a seat ring, wherein the cover plate is connected to the seat ring, and the seat ring is used to be pre-buried in a concrete layer;

[0006] The seat ring comprises a base and a support member, the base is provided with a center hole for aligning with the wellhead, and the inner side wall of the base is provided with a first protrusion for supporting the cover plate;

[0007] The support member is connected to the base and is used to be pre-buried in the concrete layer. When the concrete layer is poured, the support member is perpendicular to the mortar layer.

[0008] The first protrusion on the inner wall of the above-mentioned base disperses the cover plate load to the circumference of the base through the three-point support principle; the support member is perpendicular to the mortar layer, so that it forms a vertical anchoring structure similar to an "anchor bolt". When the vehicle load generates a horizontal component force, part of the horizontal load is converted into compressive stress on the concrete through the support member, thereby resisting displacement and reducing the risk of the manhole cover moving downhill.

[0009] Furthermore, the outer side wall of the base is provided with a second protrusion, and the support member is connected to the base via the second protrusion;

[0010] The support member is provided with a ball crown groove, and the ball crown groove has a built-in ball head;

[0011] The ball head is provided with a connecting rod, which extends out of the ball crown groove;

[0012] The connecting rod is connected to the second protrusion via a first bolt;

[0013] When the connecting rod is rotated, the ball head rotates in the ball crown groove.

[0014] Before pouring, it is necessary to ensure that the support parts are perpendicular to the mortar layer. However, the inclination angle of the road surface is mostly different in different scenarios. It is obviously not advisable to prefabricate the support parts in advance to adapt to the perpendicularity of the mortar layer. Therefore, the hinged design of the ball crown groove and the ball head is adopted to make the support parts have three-dimensional adjustability before pouring. After pouring, the poured concrete fills the gap between the ball crown groove and the ball head, thereby achieving the fixation of the ball head.

[0015] Furthermore, the second protrusion is perpendicular to the outer side wall of the base.

[0016] A second aspect provides a manhole cover construction auxiliary device, which is used to assist in installing the above-mentioned manhole cover;

[0017] The manhole cover construction auxiliary device includes:

[0018] An inclinometer, which is used to measure the inclination angle of the road surface;

[0019] A controller, the controller being connected to the inclinometer, and the controller being used to generate an adjustment instruction according to the collected inclination angle, determine the orthographic projection position of the support member on the mortar layer according to the length from the support member to the central axis of the base and the inclination angle, and generate a projection instruction;

[0020] A projection device, the projection device is connected to the controller; the projection device is used to project the positive projection position of the support member onto the mortar layer according to the projection instruction;

[0021] An adjustment component, the adjustment component is connected to the controller; the adjustment component is used to connect the seat ring and adjust the inclination angle of the base according to the adjustment instruction;

[0022] A limiting component is pre-buried in the projection position of the mortar layer when pouring the mortar layer, and the limiting component is used to abut the supporting member.

[0023] The above-mentioned inclinometer collects road slope data in real time. The controller combines the length parameters of the support to the central axis of the base, calculates the theoretical vertical projection coordinates of the support in the mortar layer through the trigonometric function algorithm, and generates three-dimensional spatial positioning instructions; the embedded position of the support is projected onto the surface of the mortar layer in the form of a laser through the projection equipment to form a visual installation point; the adjustment component adjusts the inclination of the base to ensure that the bearing surface of the manhole cover matches the road slope. The limit component limits the movement of the support during the pouring and solidification of concrete. The device transforms traditional empirical construction into quantitative installation through the full process control of "perception-calculation-projection-leveling-solidification", reducing the risk of downhill displacement of the manhole cover due to installation deviation.

[0024] Furthermore, it also includes a formwork assembly, which includes a casting formwork and a reinforcement formwork, and the middle parts of the casting formwork and the reinforcement formwork are connected by a second bolt; one end of the reinforcement formwork is used to be pre-buried in the mortar layer, and the other end of the reinforcement formwork is used to be pre-buried in the concrete layer; the casting formwork is used to be set in the center hole of the base, and when the concrete layer is cast, the outer wall of the casting formwork is fitted with the inner wall of the first protrusion.

[0025] The above-mentioned casting template is fitted with the first protrusion, the reinforcement template is pre-buried across the layers, and the casting template and the reinforcement template are connected by the second bolt, so that the casting template can be disassembled after casting. The reinforcement template, the casting template, the first protrusion and the mortar layer enclose a concrete casting area to prevent concrete from entering the well;

[0026] Furthermore, it also includes a clamping assembly, which is used to clamp the base and the casting template and adjust the relative distance between the base and the casting template;

[0027] When the clamping assembly gradually clamps the base and the casting formwork, one end of the reinforcement formwork is embedded in the mortar layer, and the portion extending out of the mortar layer is gradually bent toward the concrete layer.

[0028] The relative positions of the base and the casting template are fixed by the clamping assembly to avoid displacement during casting. The reinforced template has high toughness and can be bent while ensuring rigidity to adapt to different road inclinations.

[0029] Furthermore, the clamping assembly includes a fastener, and the fastener is provided with a U-shaped groove, and the U-shaped groove is used to accommodate the base and one end of the casting template;

[0030] The fastener is provided with a first screw hole and a first screw rod, and the first screw rod passes through the first screw hole; the first screw rod is used to make the base have a tendency to approach the casting template when a force is applied to the base;

[0031] A cushion block is arranged between the base and the casting formwork.

[0032] Since the above-mentioned casting template fits against the inner wall of the first protrusion, a gap is left between the casting template and the inner wall of the base. The gap will affect the stability of the base during casting. In order to improve the stability of the base, a pad is arranged between the base and the casting template. The pad fills the gap, increases the supporting surface of the base, and thereby improves the supporting strength.

[0033] Furthermore, the adjustment assembly includes a plurality of second screws and a driver, the output end of the driver is connected to the second screws, the input end of the driver is connected to the controller, and the driver is used to receive adjustment instructions;

[0034] The second protrusion is provided with a second screw hole adapted to the second screw rod; the second screw holes are arranged in a circular array around the central axis of the base.

[0035] By adjusting the length of the second screw rod entering the second screw hole, the height of the manhole cover can be adjusted; by adjusting a plurality of second screw rods to different heights, the inclination angle of the manhole cover can be changed.

[0036] A third aspect provides a construction method, which acts on the above-mentioned manhole cover construction auxiliary device;

[0037] The construction method comprises the following steps:

[0038] Obtain the center position of the wellhead, the inclination angle of the road surface, and the length from the support to the center axis of the base;

[0039] The distance from the support to the center of the wellhead is determined by the above-mentioned inclination angle and the length from the support to the center axis of the base;

[0040] The orthographic projection position of the support member is determined by the center position of the wellhead and the distance from the support member to the center position of the wellhead, thereby obtaining the projection position;

[0041] When pouring the mortar layer, the above-mentioned projection position is projected onto the mortar layer, and a limiter component is pre-embedded at the projection position of the mortar layer;

[0042] After the mortar layer solidifies, the support member is placed against the limit assembly to adjust the inclination angle of the base;

[0043] Pouring of concrete layer.

[0044] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0045] The first protrusion on the inner wall of the above-mentioned base disperses the cover plate load to the circumference of the base through the three-point support principle; the support member is perpendicular to the mortar layer, so that it forms a vertical anchoring structure similar to an "anchor bolt". When the vehicle load generates a horizontal component force, part of the horizontal load is converted into compressive stress on the concrete through the support member, thereby resisting displacement and reducing the risk of the manhole cover moving downhill. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0047] Figure 1 This is a simplified diagram of the structure of the manhole cover;

[0048] Figure 2 It is a simplified structural diagram of the support member;

[0049] Figure 3 A schematic diagram of the connection between the connecting rod and the second protrusion;

[0050] Figure 4 This is a simplified structural diagram of the manhole cover construction auxiliary device.

[0051] Marks and corresponding parts names in the attached drawings:

[0052] 1. Seat ring; 11. First protrusion; 12. Base; 13. Second protrusion; 14. Support member; 15. Second screw hole; 16. Ball crown groove; 17. Ball head; 18. Connecting rod; 19. First bolt; 2. Cover plate; 21. Center hole; 3. Mortar layer; 4. Concrete layer; 5. Limiting assembly; 6. Formwork assembly; 61. Casting formwork; 62. Reinforced formwork; 63. Second bolt; 7. Clamping assembly; 71. First screw; 72. Fastener; 73. Spacer; 8. Adjustment assembly; 81. Driver; 82. Second screw. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0054] First embodiment:

[0055] Combination Figures 1 to 3 A manhole cover comprises a cover plate 2 and a seat ring 1, wherein the cover plate 2 is connected to the seat ring 1, and the seat ring 1 is used to be pre-buried in a concrete layer 4, and the road surface construction requires first laying a mortar layer 3 and then laying a concrete layer 4;

[0056] The seat ring 1 comprises a base 12 and a support member 14. The base 12 is provided with a central hole 21 for aligning with the wellhead. The wellhead is only aligned, and the central axis of the wellhead is not required to coincide with the central axis of the base 12.

[0057] The inner side wall of the base 12 is provided with a first protrusion 11, and the first protrusion 11 is used to support the cover plate 2;

[0058] The support member 14 is connected to the base 12 . The support member 14 is used to be embedded in the concrete layer 4 . When the concrete layer 4 is poured, the support member 14 is perpendicular to the mortar layer 3 .

[0059] The first protrusion 11 on the inner wall of the base 12 disperses the load of the cover plate 2 to the circumference of the base 12 through the three-point support principle; the support member 14 is perpendicular to the mortar layer 3, so that it forms a vertical anchoring structure similar to an "anchor bolt". When the vehicle load generates a horizontal component, part of the horizontal load is converted into compressive stress on the concrete through the support member 14, thereby resisting displacement and reducing the risk of the manhole cover moving downhill.

[0060] Second embodiment:

[0061] On the basis of the first embodiment, the outer wall of the base 12 is provided with a second protrusion 13, and the support member 14 is connected to the base 12 via the second protrusion 13; the second protrusion 13 is perpendicular to the outer wall of the base 12;

[0062] The support member 14 is provided with a ball crown groove 16, and the ball crown groove 16 has a ball head 17 built therein;

[0063] The ball head 17 is provided with a connecting rod 18, and the connecting rod 18 extends out of the ball crown groove 16;

[0064] The connecting rod 18 is connected to the second protrusion 13 via a first bolt 19;

[0065] When the connecting rod 18 is rotated, the ball head 17 rotates in the ball crown groove 16 .

[0066] Before pouring, it is necessary to ensure that the support member 14 is perpendicular to the mortar layer 3. However, the inclination angle of the road surface is mostly different in different scenarios. It is obviously not advisable to prefabricate the support member 14 in advance to adapt to the perpendicularity of the mortar layer 3. Therefore, the hinged design of the ball crown groove 16 and the ball head 17 is adopted to make the support member 14 have three-dimensional adjustability before pouring. After pouring, the poured concrete fills the gap between the ball crown groove 16 and the ball head 17, thereby achieving the fixation of the ball head 17.

[0067] Third embodiment:

[0068] Combination Figure 4 , a manhole cover construction auxiliary device, the manhole cover construction auxiliary device is used to assist in the installation of the above-mentioned manhole cover;

[0069] The manhole cover construction auxiliary device includes:

[0070] An inclinometer, which is used to measure the inclination angle of the road surface;

[0071] A controller, the controller being connected to the inclinometer, and the controller being used to generate an adjustment instruction according to the collected inclination angle, determine the orthographic projection position of the support member 14 on the mortar layer 3 according to the length from the support member 14 to the central axis of the base 12 and the inclination angle, and generate a projection instruction;

[0072] A projection device, the projection device is connected to the controller; the projection device is used to project the positive projection position of the support member 14 onto the mortar layer 3 according to the projection instruction;

[0073] An adjustment component 8, the adjustment component 8 is connected to the controller; the adjustment component 8 is used to connect to the seat ring 1 and adjust the inclination angle of the base 12 according to the adjustment instruction;

[0074] The limiting component 5 is pre-buried in the projection position of the mortar layer 3 when pouring the mortar layer 3 . The limiting component 5 is used to abut against the supporting member 14 .

[0075] The above-mentioned inclinometer collects the road slope data in real time. The controller combines the length parameters of the support 14 to the central axis of the base 12, calculates the theoretical vertical projection coordinates of the support 14 in the mortar layer 3 through the trigonometric function algorithm, and generates a three-dimensional space positioning instruction; the embedded position of the support 14 is projected onto the surface of the mortar layer 3 in the form of a laser through the projection equipment to form a visual installation point; the adjustment component 8 adjusts the inclination of the base 12 to ensure that the bearing surface of the manhole cover matches the road slope. The limit component 5 limits the movement of the support 14 during the pouring and solidification of concrete. The device transforms traditional empirical construction into quantitative installation through the full process control of "perception-calculation-projection-leveling-solidification", reducing the risk of downhill displacement of the manhole cover due to installation deviation.

[0076] Fourth embodiment:

[0077] On the basis of the third embodiment, it also includes a formwork assembly 6, the formwork assembly 6 includes a casting formwork 61 and a reinforcement formwork 62, the middle parts of the casting formwork 61 and the reinforcement formwork 62 are connected by a second bolt 63; one end of the reinforcement formwork 62 is used to be pre-buried in the mortar layer 3, and the other end of the reinforcement formwork 62 is used to be pre-buried in the concrete layer 4; the casting formwork 61 is used to be set in the center hole 21 of the base 12, and when the concrete layer 4 is cast, the outer wall of the casting formwork 61 is in contact with the inner wall of the first protrusion 11.

[0078] The casting template 61 is fitted with the first protrusion 11, and the reinforcement template 62 is pre-buried across the layer. The casting template 61 and the reinforcement template 62 are connected by the second bolt 63, so that the casting template 61 can be disassembled after casting. The reinforcement template 62, the casting template 61, the first protrusion 11 and the mortar layer 3 enclose a concrete casting area to prevent concrete from entering the well;

[0079] Fifth embodiment:

[0080] On the basis of the fourth embodiment, it further includes a clamping assembly 7, the clamping assembly 7 is used to clamp the base 12 and the casting template 61, and adjust the relative distance between the base 12 and the casting template 61;

[0081] When the clamping assembly 7 gradually clamps the base 12 and the casting formwork 61 , one end of the reinforcement formwork 62 is embedded in the mortar layer 3 , and the portion extending out of the mortar layer 3 gradually bends toward the concrete layer 4 .

[0082] The relative positions of the base 12 and the casting template 61 are fixed by the clamping assembly 7 to avoid displacement during casting. The reinforced template 62 has high toughness and can be bent while ensuring rigidity to adapt to different road inclinations.

[0083] Specifically, the clamping assembly 7 includes a fastener 72, and the fastener 72 is provided with a U-shaped groove, and the U-shaped groove is used to accommodate the base 12 and one end of the casting template 61;

[0084] The fastener 72 is provided with a first screw hole and a first screw rod 71, and the first screw rod 71 passes through the first screw hole; the first screw rod 71 is used to make the base 12 have a tendency to approach the casting template 61 when a force is applied to the base 12;

[0085] A cushion block 73 is provided between the base 12 and the casting form 61 .

[0086] Since the above-mentioned casting template 61 fits with the inner wall of the first protrusion 11, a gap is left between the casting template 61 and the inner wall of the base 12. The gap will affect the stability of the base 12 during casting. In order to improve the stability of the base 12, a pad 73 is arranged between the base 12 and the casting template 61. The pad 73 fills the gap, increases the supporting surface of the base 12, and thus improves the supporting strength.

[0087] Sixth embodiment:

[0088] On the basis of the third embodiment, the adjustment assembly 8 comprises a plurality of second screws 82 and a driver 81 (a motor may be used), the output end of the driver 81 is connected to the second screws 82, the input end of the driver 81 is connected to the controller, and the driver 81 is used to receive adjustment instructions;

[0089] The second protrusion 13 is provided with a second screw hole 15 adapted to the second screw rod 82; the second screw holes 15 are arranged in a circular array around the central axis of the base 12. After the adjustment is completed, the driver 81 is removed and then poured.

[0090] By adjusting the length of the second screw rod 82 entering the second screw hole 15, the height of the manhole cover can be adjusted; by adjusting a plurality of second screw rods 82 to different heights, the inclination angle of the manhole cover can be changed.

[0091] Seventh embodiment:

[0092] A construction method, which acts on the above-mentioned manhole cover construction auxiliary device;

[0093] The construction method comprises the following steps:

[0094] Obtain the center position of the wellhead, the inclination angle of the road surface, and the length from the support member 14 to the center axis of the base 12;

[0095] The distance from the support member 14 to the center of the wellhead is determined by the above-mentioned inclination angle and the length from the support member 14 to the center axis of the base 12;

[0096] The positive projection position of the support member 14 is determined by the center position of the wellhead and the distance from the support member 14 to the center position of the wellhead, and the projection position is obtained;

[0097] When pouring the mortar layer 3, the above-mentioned projection position is projected onto the mortar layer 3, and a limiting component 5 is pre-embedded at the projection position of the mortar layer 3;

[0098] After the mortar layer 3 solidifies, the support member 14 is abutted against the limiting assembly 5 to adjust the inclination angle of the base 12;

[0099] Pour concrete layer 4.

[0100] A laser rangefinder is used to establish a three-dimensional coordinate system of the wellhead, determine the center coordinates, and scan the road surface through an inclinometer array to obtain the road surface inclination angle at the wellhead position; the theoretical position of the support member 14 is calculated based on the road surface inclination angle.

[0101] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A manhole cover, characterized in that: It comprises a cover plate (2) and a seat ring (1), wherein the cover plate (2) is connected to the seat ring (1), and the seat ring (1) is used to be pre-buried in a concrete layer (4); The seat ring (1) comprises a base (12) and a support member (14), wherein the base (12) is provided with a center hole (21) for aligning with a wellhead, and an inner side wall of the base (12) is provided with a first protrusion (11), and the first protrusion (11) is used to support the cover plate (2); The support member (14) is connected to the base (12), and the support member (14) is used to be pre-buried in the concrete layer (4). When the concrete layer (4) is poured, the support member (14) is perpendicular to the mortar layer (3).

2. The manhole cover according to claim 1, characterized in that: The outer side wall of the base (12) is provided with a second protrusion (13), and the support member (14) is connected to the base (12) via the second protrusion (13); The support member (14) is provided with a spherical cap groove (16), and a ball head (17) is built into the spherical cap groove (16); The ball head (17) is provided with a connecting rod (18), and the connecting rod (18) extends out of the ball cap groove (16); The connecting rod (18) is connected to the second protrusion (13) via a first bolt (19); When the connecting rod (18) is rotated, the ball head (17) rotates in the ball crown groove (16).

3. The manhole cover according to claim 2, characterized in that: The second protrusion (13) is perpendicular to the outer side wall of the base (12).

4. A manhole cover construction auxiliary device, characterized in that: The manhole cover construction auxiliary device is used to assist in the installation of the manhole cover according to any one of claims 1 to 3; The manhole cover construction auxiliary device includes: An inclinometer, which is used to collect the inclination angle of the road surface; A controller connected to the inclinometer, the controller being used to generate an adjustment instruction according to the collected inclination angle, determine the orthographic projection position of the support member (14) on the mortar layer (3) according to the length of the support member (14) to the central axis of the base (12) and the inclination angle, and generate a projection instruction; A projection device, the projection device being connected to the controller; the projection device being used to project the positive projection position of the support member (14) onto the mortar layer (3) according to a projection instruction; An adjustment component (8), the adjustment component (8) being connected to the controller; the adjustment component (8) being used to connect to the seat ring (1) and to adjust the inclination angle of the base (12) according to an adjustment instruction; A limiting component (5) is pre-buried at a projection position of the mortar layer (3) when the mortar layer (3) is poured, and the limiting component (5) is used to abut against a support member (14).

5. The manhole cover construction auxiliary device according to claim 4, characterized in that: The invention also comprises a formwork assembly (6), wherein the formwork assembly (6) comprises a casting formwork (61) and a reinforcement formwork (62), wherein the middle parts of the casting formwork (61) and the reinforcement formwork (62) are connected by a second bolt (63); one end of the reinforcement formwork (62) is used for being embedded in the mortar layer (3), and the other end of the reinforcement formwork (62) is used for being embedded in the concrete layer (4); the casting formwork (61) is used for being arranged in the central hole (21) of the base (12), and when the concrete layer (4) is cast, the outer wall of the casting formwork (61) is in contact with the inner wall of the first protrusion (11).

6. The manhole cover construction auxiliary device according to claim 5, characterized in that: It also includes a clamping assembly (7), wherein the clamping assembly (7) is used to clamp the base (12) and the casting template (61) to adjust the relative distance between the base (12) and the casting template (61); When the clamping assembly (7) gradually clamps the base (12) and the casting template (61), one end of the reinforcement template (62) is embedded in the mortar layer (3), and the portion extending out of the mortar layer (3) is gradually bent toward the concrete layer (4).

7. The manhole cover construction auxiliary device according to claim 6, characterized in that: The clamping assembly (7) comprises a fastener (72), wherein the fastener (72) is provided with a U-shaped groove, and the U-shaped groove is used to accommodate the base (12) and one end of the casting template (61); The fastener (72) is provided with a first screw hole and a first screw rod (71), and the first screw rod (71) passes through the first screw hole; the first screw rod (71) is used to apply force to the base (12), so that the base (12) has a tendency to approach the casting template (61); A cushion block (73) is provided between the base (12) and the casting template (61).

8. The manhole cover construction auxiliary device according to claim 4, characterized in that: The adjustment assembly (8) comprises a plurality of second screw rods (82) and a driver (81), wherein the output end of the driver (81) is connected to the second screw rods (82), the input end of the driver (81) is connected to the controller, and the driver (81) is used to receive an adjustment instruction; The second protrusion (13) is provided with a second screw hole (15) adapted to the second screw rod (82); the second screw holes (15) are arranged in a circular array around the central axis of the base (12).

9. A construction method, characterized in that: The construction method acts on the manhole cover construction auxiliary device as claimed in any one of claims 4 to 8; The construction method comprises the following steps: Obtain the center position of the wellhead, the inclination angle of the road surface, and the length from the support to the center axis of the base; Determine the distance from the support member to the center of the wellhead by the inclination angle and the length from the support member to the center axis of the base; Determine the positive projection position of the support member by the center position of the wellhead and the distance from the support member to the center position of the wellhead, and obtain the projection position; When pouring the mortar layer, the projection position is projected onto the mortar layer, and a limiting component is pre-embedded at the projection position of the mortar layer; After the mortar layer solidifies, the support member is placed against the limit assembly to adjust the inclination angle of the base; Pouring of concrete layer.

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