Straight bearing type well lid capable of being lifted and leveled

Abstract

The utility model provides a straight bearing type well lid capable of being lifted and leveled, which comprises a threaded sleeve, the threaded sleeve is embedded at the upper end of a prefabricated adjusting cylinder, a jacking screw rod is in threaded connection in the threaded sleeve, and the jacking screw rod upwards protrudes out of the prefabricated adjusting cylinder and then is rotatably connected with the well lid. The well lid has the advantages of short construction period, convenience in construction, low cost, small traffic influence and the like.

Description

Technical Field

[0001] The utility model relates to the field of municipal road construction, in particular to a straight-supported manhole cover which can be raised, lowered and leveled. Background Art

[0002] At present, most of the manhole covers used on urban roads are direct-supported ductile iron inspection manhole covers, which are reinforced by cast-in-place or prefabricated reinforced concrete foundations. The inspection well shaft is first made below the bottom of the pavement structure layer, and sealed with a cover plate with the same diameter as the outer wall of the shaft. The road base and the lower asphalt concrete layer are paved as a whole. After the construction of the lower layer is completed, the inspection well position is cut and excavated by machinery, the cover plate is lifted out, and then the cast-in-place or prefabricated reinforced concrete foundation is constructed. The base of the manhole cover is adjusted in height and fixed by embedded bolts and nuts in the reinforced concrete foundation. The top elevation of the manhole cover is flush with the upper asphalt layer. After the adjustment is completed, the area around the bolts is filled with grouting material, and finally the asphalt upper layer is paved as a whole.

[0003] In the above construction process, the direct-supported ductile iron inspection manhole cover is rigidly connected to the base layer and should be reinforced in place at one time. Once the height is fixed, it cannot be adjusted again. Therefore, before the upper layer of asphalt is paved, the manhole cover will be higher than the lower layer of asphalt by a certain height (this height is the thickness of the upper layer of asphalt). This construction method has the following disadvantages:

[0004] ① For sections of road that need to be temporarily opened to traffic, the manhole covers are higher than the surrounding road surface, which poses a certain safety hazard to passing pedestrians and vehicles, and can easily cause accidents such as pedestrians and non-motor vehicles tripping and motor vehicle tire blowouts.

[0005] ② Due to construction quality issues, some manhole covers have elevation deviations and cannot be adjusted a second time. After the upper layer of asphalt is paved, the flatness will be poor, seriously affecting driving comfort.

[0006] ③ After the road construction is completed, as the road traffic time increases, the long-term rolling of vehicles will cause some inspection manhole covers to sink and be damaged. Since the manhole cover is rigidly connected to the foundation, maintenance and repair can only be carried out by dismantling the entire cover and re-reinforcement, which seriously affects traffic, and the construction period and cost are relatively high. Utility Model Content

[0007] In view of the above problems, the utility model provides a straight-supported manhole cover that can be raised and lowered and leveled, and the manhole cover has the advantages of short construction period, convenient construction, low cost, and little traffic impact.

[0008] A straight-supported manhole cover that can be raised, lowered and leveled comprises a threaded sleeve, which is embedded in the upper end of a prefabricated adjustment cylinder. A lifting screw is connected to the inner thread of the threaded sleeve, and the lifting screw protrudes upward from the prefabricated adjustment cylinder and is rotatably connected to the manhole cover.

[0009] Preferably, the length of the lifting screw above the prefabricated adjusting cylinder is greater than the laying thickness of the asphalt.

[0010] Preferably, a steel plate is installed on the upper surface of the prefabricated adjustment cylinder, and the threaded sleeve is connected to the lower surface of the steel plate.

[0011] Preferably, the steel plate is connected to the prefabricated adjustment cylinder via anchor bolts.

[0012] Preferably, a grouting layer for fixing and lifting the manhole cover is provided above the steel plate and below the asphalt.

[0013] Preferably, the lifting screw rod penetrates upward to the top of the manhole cover and becomes flush with the upper surface of the manhole cover.

[0014] Preferably, there are multiple lifting screws, and the multiple lifting screws are evenly distributed in a circular shape along the center of the manhole cover.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model embeds a threaded sleeve in the prefabricated adjustment cylinder, and the screw rod penetrates the manhole cover downward and is connected to the threaded sleeve. Before laying the upper layer of asphalt, the lifting screw rod is adjusted to the height of the upper layer of asphalt. After the upper layer of asphalt is laid, the gap of the lifting screw rod is filled with grouting material, and traffic can be opened after the filling material is solidified. Whether during or after the pavement is paved, the height of the manhole cover is always at the same height as the surrounding road surface, which improves driving comfort and eliminates safety hazards.

[0017] 2. During the daily maintenance of the road surface, if the manhole cover is found to have settled or been damaged, it is only necessary to break the grouting material part, unscrew all the lifting screws, reinstall the new manhole cover, adjust the elevation and re-grout the bolt gap part. This has the advantages of short construction period, convenient construction, low cost and little traffic impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model before the manhole cover is lifted;

[0020] Figure 2 yes Figure 1 A partial enlarged view of the

[0021] Figure 3 It is a schematic diagram of the overall structure of the utility model after the manhole cover is lifted;

[0022] Figure 4 yes Figure 3 A partial enlarged view of the

[0023] Figure 5 It is the distribution diagram of the lifting screws on the manhole cover;

[0024] In the figure, 1. lower layer of asphalt, 2. anchor bolts, 3. prefabricated adjusting cylinder, 4. manhole cover, 5. steel plate, 6. threaded sleeve, 7. lifting screw, 8. grouting layer, 9. upper layer of asphalt. DETAILED DESCRIPTION

[0025] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0026] like Figure 1-5 As shown, the utility model discloses a straight-supported manhole cover that can be raised and lowered and leveled. The new manhole cover is a manhole cover in which six lifting screws 7 that can rotate along the connection points are evenly arranged around the existing manhole cover 4. The rotating connection method is preferably installed through a bearing, that is, the lifting screw 7 can rotate along the connection point of the manhole cover 4 with the axis of the lifting screw 7 as the center, but cannot move up and down along the manhole cover 4. The lower end of the lifting screw 7 is threadedly connected to the threaded sleeve 6 embedded in the prefabricated adjustment cylinder 3, and the threaded sleeve 6 is welded to the lower surface of the steel plate 5. The steel plate 5 and the prefabricated adjustment cylinder 3 are fixed by the anchor bolts 2 embedded in the prefabricated adjustment cylinder. The prefabricated adjustment cylinder is prefabricated with C40 reinforced concrete.

[0027] When the construction of the lower layer of asphalt 1 is completed, the inspection well position is cut and excavated mechanically, and a prefabricated adjusting cylinder 3 is installed. The anchor bolts 2 and the threaded sleeve 6 with the steel plate 5 are pre-buried in the prefabricated adjusting cylinder 3. The manhole cover 4 is placed on the upper end of the prefabricated adjusting cylinder 3, and the jacking screw 7 is screwed into the threaded sleeve 6 in the prefabricated adjusting cylinder 3. The manhole cover 4 is first adjusted and positioned to the height where the lower layer of asphalt 1 has been laid by rotating the jacking screw 7. At this time, during the subsequent construction process, even if the road is temporarily opened to traffic and put into use, since the height of the manhole cover 4 is consistent with the height of the lower layer of asphalt, pedestrians and vehicles walking or driving on it will not trip. Before laying the upper layer of asphalt 9, turn the lifting screw 6 to raise the manhole cover 4 and adjust it to the height of the upper layer of asphalt 9. After the upper layer of asphalt 9 is laid to the set height, promptly review and fine-tune the height stroke of the inspection well top. After the fine-tuning is completed, use C60 high-strength expansive concrete grouting material to fill and pour the gap between the lifting screw and the lower layer of asphalt 1 to form a grouting layer 8. After the filling material solidifies, it can be opened to traffic.

[0028] This structure is also convenient and quick to construct in the daily maintenance of road manhole covers. If the manhole cover is found to have settled or damaged, it is only necessary to break the grouting material part, unscrew all the lifting screws, reinstall the new manhole cover, adjust the elevation and re-grout the gap of the lifting screw. The whole process is fast in construction, short in construction period and low in cost.

[0029] The above description is only a preferred implementation method of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A straight-supported manhole cover that can be raised and lowered and leveled, characterized in that: It comprises a threaded sleeve (6) which is embedded in the upper end of a prefabricated adjustment cylinder (3). The threaded sleeve is internally threadedly connected to a lifting screw (7). The lifting screw protrudes upwards from the prefabricated adjustment cylinder and is rotatably connected to the manhole cover (4).

2. The straight-supported manhole cover capable of lifting and leveling according to claim 1 is characterized in that: The length of the portion of the lifting screw (7) located above the prefabricated adjustment cylinder (3) is greater than the paving thickness of the asphalt.

3. The straight-supported manhole cover capable of lifting and leveling according to claim 1 is characterized in that: A steel plate (5) is mounted on the upper surface of the prefabricated adjustment cylinder (3), and the threaded sleeve (6) is connected to the lower surface of the steel plate (5).

4. The straight-supported manhole cover capable of lifting and leveling according to claim 3 is characterized in that: The steel plate (5) is connected to the prefabricated adjustment cylinder (3) via anchor bolts (2).

5. The straight-supported manhole cover capable of lifting and leveling according to claim 3 is characterized in that: A grouting layer (8) for fixing and lifting the manhole cover is provided above the steel plate (5) and below the asphalt.

6. The straight-supported manhole cover capable of lifting and leveling according to claim 1 is characterized in that: The lifting screw rod (7) penetrates upward to the top of the manhole cover (4) and becomes flush with the upper surface of the manhole cover.

7. The straight-supported manhole cover capable of lifting and leveling according to claim 1 is characterized in that: There are a plurality of lifting screws (7), and the plurality of lifting screws are evenly distributed in a circular shape along the center of the manhole cover (4).

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