Construction method for preventing surrounding subsidence and local damage of urban road manhole

Abstract

The invention discloses a construction method for preventing surrounding subsidence and local damage of an urban road manhole. The construction method for preventing the surrounding subsidence and the local damage of the urban road manhole comprises the steps of determining a manhole surrounding treatment range; digging and removing old pavement structures within the range; mounting a manhole surrounding reinforcement cage; mounting a cast iron manhole seat; adjusting the elevation of the manhole seat; supporting a template; pouring concrete; protecting a finished product; and laying an asphalt concrete surface course. According to the construction method for preventing the surrounding subsidence and the local damage of the urban road manhole, a problem that the surrounding subsidence and local damage frequently occur because the traditional material cannot be compacted in the traditional manhole surrounding treatment method is solved; as early strength concrete and the manhole surrounding reinforcement cage are organically combined, the difficulty that urban road construction time is limited can be overcome; the urban road manhole with the surrounding subsidence and the local damage can be rapidly repaired and can be rapidly open to traffic; and a manhole surrounding disease treatment effect is complete.

Description

technical field [0001] The invention relates to the technical field of road construction, in particular to a construction method for preventing subsidence and local damage around inspection wells of urban roads. Background technique [0002] At present, the main methods for dealing with diseases around wells in urban road inspection wells are as follows: [0003] Epoxy asphalt mixture repair method, this method uses epoxy asphalt mixture as the current road inspection well digging repair method. Although this method is simple and easy to implement, the equipment requirements are low, but epoxy asphalt mixture is used as a repair method. The strength and durability of the material are relatively low, which cannot solve the problem of uneven settlement and recurrence of diseases caused by insufficient compaction of the surrounding roadbed in the inspection well. [0004] Super early strength grouting material repair method, this method is to use super early strength grouting ...

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Problems solved by technology

[0003] Epoxy asphalt mixture repair method, this method uses epoxy asphalt mixture as the method of digging and repairing around the existing road inspection well. The strength and durability of the material are relatively low, which cannot solve the problem of insufficient compaction of the road bed around the inspection well, which leads to uneven settlement and recurrence of disease

[0004] Super early strength grouting material repair method, this method is to use super early strength grouting material to pour in the pouring space around the well, and vibrate and scrape it. The gap around the well also plays a certain role in strengthening the road bed around the well, but the construction method mainly based on grouting is difficult to control the uniformity of the treatment of the construction treatment position, and this method has a great impact on the inspection of the well seat and the foundation. Inadequate consideration was given to the treatment methods for the connection, pouring parts and the surrounding existing pavement, and it was difficult to control the quality of the project

[0005] Cement concrete repair method around the well, this method is to use early-strength concrete to repair the well around the well, and use early-strength concrete to deal with the subsidence of the existing road inspection well around the well. The compressive strength of the position has been greatly improved, but due to the limited treatment range, its flexural and tensile strength is not easy to control. In addition, only cement concrete repair method is used, and the connection between the repair position and the well base of the inspection well is relatively weak, and the integrity is not strong

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