Steel box girder maintenance hole structure convenient to overhaul

Abstract

The application discloses a kind of steel box girder access hole structures of convenient overhaul, including outer layer rectangular wellhead device and inner layer circular wellhead device, replaceable water stop sealing device is set in double-layer wellhead;The outer wellhead device includes outer rectangular wellhead, outer rectangular access hole cover, first waterproof rubber pad is provided between wellhead and cover, replaceable water stop kit is provided between wellhead and cover end groove;The inner wellhead device includes inner circular wellhead, inner circular access hole cover, second waterproof rubber pad is provided between wellhead and cover, inside wellhead protrudes steel box girder, and waterproof layer is brushed between inside and outside wellhead.The application can solve the technical problems of using bridge maintenance space (such as isolation belt or pedestrian walkway) to set access hole structure, effectively solve the technical problems of city steel beam maintenance;And can solve the water-tight performance and bridge aesthetic appearance and other technical problems of access hole structure.

Description

Technical Field

[0001] This invention pertains to the improvement technology of bridge structures. Background Technology

[0002] Currently, inspection holes for steel box girders are typically located at the bottom and sides of the girder, which is suitable for steel girder bridges where there is no space for maintenance on the bridge deck. However, for steel girder bridges with complex underpass spaces or high bridge heights, placing inspection holes at the bottom and sides is inconvenient for maintenance, causing the following problems: 1. Maintenance inside the steel girder requires the erection of scaffolding or the use of temporary measures such as elevators for personnel to enter; 2. Erecting scaffolding or using elevators occupies the underpass lanes, affecting traffic; 3. It is difficult for maintenance personnel or equipment to enter the bridge interior, posing safety hazards for underpass maintenance operations. These difficulties can be addressed by utilizing bridge deck space (median strips or sidewalks) to set up inspection holes, but current technical measures cannot fundamentally solve the problems of watertightness of bridge deck inspection holes and the aesthetics of the bridge deck. Summary of the Invention

[0003] The purpose of this invention is to provide a convenient inspection hole structure for steel box girders, so as to solve the technical problem of urban steel beam maintenance by utilizing bridge deck maintenance space (such as median strips or pedestrian walkways) to set up the inspection hole structure; and to solve the technical problems of water tightness and bridge deck aesthetics of the inspection hole structure.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0005] A convenient inspection hole structure for steel box girders includes an outer rectangular wellhead device and an inner circular wellhead device, both wellheads being equipped with replaceable water-stop sealing devices; the outer wellhead device includes an outer rectangular wellhead 1, an outer rectangular inspection well cover 2, a first waterproof rubber gasket 3 between the wellhead and the well cover, and a replaceable water-stop kit 4 between the end grooves of the wellhead and the well cover; the inner wellhead device includes an inner circular wellhead 9, an inner circular inspection well cover 10, a second waterproof rubber gasket 11 between the wellhead and the well cover, the inner wellhead protruding from the steel box girder, and a waterproof layer 14 being applied between the inner and outer wellheads.

[0006] The water-stop kit 4 consists of an extruded rubber strip and a replaceable caulking and sealing liquid rubber substrate.

[0007] A stainless steel decorative strip 6 is provided between the outer manhole and the end of the manhole cover, and the groove on the top surface of the outer rectangular inspection manhole cover is paved with decorative paving (8).

[0008] An anti-theft cover kit 5 is installed on the outer rectangular maintenance manhole cover, and anti-theft bolts are installed on the cover. The inner circular maintenance manhole cover is fixed to the inner circular manhole opening by anti-theft bolts 12.

[0009] A first manhole cover handle 7 is installed on the outer rectangular manhole cover, and a second manhole cover handle (13) is installed on the inner circular manhole cover.

[0010] Advantages and positive effects of the present invention:

[0011] 1) The structure of this invention is applied to the inspection holes of steel box girder bridge decks to meet the daily maintenance needs of bridges and ensure the safety of structural operation;

[0012] 2) The inspection hole structure provided by this invention simplifies the inspection difficulty and ensures the safety of maintenance personnel;

[0013] 3) Some detailed structural measures within the structure ensured the waterproof effect of the inspection holes, reduced the difficulty of opening and closing, met the flatness requirements of the bridge deck, and improved the appearance quality of the bridge deck. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the steel box girder with inspection holes on the top surface according to the present invention.

[0015] Figure 2 This is a plan view of the structure of the inspection hole on the top surface of the steel box girder of the present invention.

[0016] Figure 3 This is a detailed drawing of the inner circular inspection manhole cover of the present invention.

[0017] Figure 4 This is a detailed drawing of the anti-theft cover kit of the present invention.

[0018] Numbered in the diagram: 1-Outer rectangular manhole, 2-Outer rectangular inspection manhole cover, 3-First waterproof rubber gasket, 4-Replaceable water-stop kit, 5-Anti-theft cover kit, 6-Stainless steel decorative strip, 7-First manhole cover handle, 8-Decorative paving, 9-Inner circular manhole, 10-Inner circular inspection manhole cover, 11-Second waterproof rubber gasket, 12-Hex bolt kit, 13-Second manhole cover handle, 14-Waterproof sealing layer, 15-Welding, 16-Steel box girder top plate, 17-Sidewalk or median strip paving, 18-Anti-theft stainless steel M3 screw, 19-Waterproof gasket 2mm, 20-Adhesive, 21-Mortar filler. Detailed Implementation

[0019] For the specific structure of this invention, please refer to Figure 1 , Figure 2 , Figure 3 As shown, the double-layer inspection wellhead design includes an outer rectangular wellhead device and an inner circular wellhead device. Both wellheads are equipped with replaceable water-stop sealing devices to prevent the intrusion of dust and liquids, greatly improving the water tightness guarantee rate of the inspection hole.

[0020] The outer wellhead device includes an outer rectangular wellhead (1), an outer rectangular inspection well cover (2), a first waterproof rubber pad (3) between the wellhead and the well cover, and a replaceable water-stop kit (4) between the end grooves of the wellhead and the well cover. The water-stop kit is composed of a squeeze-type rubber strip and a replaceable caulking and sealing liquid rubber substrate, which maintains good airtightness and waterproofness of the inspection hole under expansion, vibration and temperature changes.

[0021] The inner wellhead device includes an inner circular wellhead (9), an inner circular inspection well cover (10), a second waterproof rubber pad (11) between the wellhead and the well cover, the inner wellhead protruding from the steel box beam, and a waterproof layer (14) applied between the inner and outer wellheads to improve the durability of the inspection hole.

[0022] A stainless steel decorative strip (6) is provided between the outer manhole opening and the end of the manhole cover, and the groove on the top surface of the outer rectangular inspection manhole cover is paved with decorative paving (8). The bridge deck paving can be made as needed to ensure the integrity and aesthetics of the bridge deck paving.

[0023] See Figure 4 As shown, anti-theft measures are implemented on both the inner and outer manhole covers to enhance their anti-theft capabilities. An anti-theft cover kit (5) is installed on the outer rectangular inspection manhole cover, and anti-theft bolts are installed on the cover. The inner circular inspection manhole cover is fixed to the inner circular manhole opening by anti-theft bolts (12). The inspection hole can be opened and closed directly with simple equipment, facilitating the entry and exit of maintenance personnel.

[0024] A first manhole cover handle (7) is installed on the outer rectangular inspection manhole cover. The outer manhole cover can be opened by opening the anti-theft cover kit (5) using the handle.

[0025] A second manhole cover handle (13) is installed on the inner circular inspection manhole cover, which can be used to open the inner manhole cover.

[0026] Based on the above technical solution, the contents of this invention can be adjusted as needed, mainly in the following three aspects:

[0027] The size of the inspection hole can be adjusted according to maintenance needs in the specific design.

[0028] The style of the anti-theft cover can be adjusted according to the overall appearance requirements in the specific design.

[0029] The style of decorative paving can be adjusted according to the overall appearance requirements in the specific design.

[0030] The material for decorative strips can be selected based on landscape requirements and durability needs.

Claims

1. A steel box girder manhole structure which is convenient for inspection, characterized by, The double-layer wellhead comprises an outer-layer rectangular wellhead and an inner-layer circular wellhead, and both of them are provided with replaceable water sealing devices; the outer-layer rectangular wellhead comprises an outer-layer rectangular wellhead (1), an outer-layer rectangular manhole cover (2), a first water-proof rubber pad (3) arranged between the wellhead and the manhole cover, and a replaceable water sealing kit (4) arranged between the wellhead and the end groove of the manhole cover; the inner-layer circular wellhead comprises an inner-layer circular wellhead (9), an inner-layer circular manhole cover (10), a second water-proof rubber pad (11) arranged between the wellhead and the manhole cover, and a protruding steel box beam of the inner-layer wellhead, so that the inner-layer wellhead is higher than the inner wall bottom of the outer-layer rectangular wellhead (1), a water-proof layer (14) is coated between the inner and outer-layer wellheads, and the water-proof layer (14) is arranged on the surface of the water-containing space formed between the inner wall of the outer-layer rectangular wellhead (1), the outer wall of the inner-layer circular wellhead (9) and the top of the steel box beam top plate (16).

2. The easily accessible steel box girder manhole structure according to claim 1, wherein, The water sealing kit (4) is composed of an extruded rubber belt and a replaceable caulking water sealing liquid rubber base material.

3. The easily accessible steel box girder manhole structure of claim 1, wherein, A stainless steel decorative strip (6) is arranged between the outer-layer wellhead and the end of the manhole cover, and a decorative paving (8) is paved on the top groove of the outer-layer rectangular manhole cover.

4. The easily accessible steel box girder manhole structure of claim 1, wherein, A theft-proof cover plate kit (5) is arranged on the outer-layer rectangular manhole cover, and a theft-proof bolt is arranged on the cover plate; the inner-layer circular manhole cover is fixed on the inner-layer circular wellhead through a theft-proof bolt (12).

5. The easily accessible steel box girder manhole structure of claim 1, wherein, A first manhole cover handle (7) is arranged on the outer-layer rectangular manhole cover, and a second manhole cover handle (13) is arranged on the inner-layer circular manhole cover.

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