Calibration method for lifting of movable examination well shutter

Abstract

The invention discloses a calibration method for lifting of a movable examination well shutter, comprising the following steps of: (1) adding an isolation ring out of a well shutter combination formed by the movable examination well shutter and a well base; (2) reserving reinforcing steel bars on the periphery of the isolating ring, burying the reserved reinforcing steel bars into ground to form a material integrated with the ground; (3) when the well shutter combination is placed in the isolation ring, reserving a gasket and an embedded fixing clip between the well shutter combination and the isolation ring; (4) arranging a cushion layer at the lower edge of the well shutter combination and the isolation ring and reserving a gap therebetween; (5) when maintenance is required, inserting a crowbar into the gap, prying the movable examination well shutter combination, and placing a special gasket between the well shutter combination and the isolation ring if the movable examination well shutter combination is needed to raise to the normal position; and on the contrary, extracting the reserved gasket between the well shutter combination and the isolation ring. The invention can solve the repairing problem of the well base of an examination well which sinks, raises or tilts under pressure. And the maintenance is dry operation which can be accomplished within an hour, thereby not causing traffic jam, easing the labor intensity and having low cost and high efficiency.

Description

technical field [0001] The invention relates to an inspection manhole cover used for inspecting facilities such as underground pipelines, electric cables, optical cables, etc., specifically relates to a movable inspection manhole cover, and especially relates to a correction method for its lifting. Background technique [0002] Traditional drainage inspection wells, rainwater inspection wells, sewage inspection wells and other traditional inspection well covers often have the disadvantages of sinking or tilting of the well base under pressure, and the manhole cover is easy to be squeezed by the wheels and turned over. For the maintenance of manhole cover sinking or tilting, the traditional method is to use manual excavation, re-leveling, concrete pouring and solidification, and the fastest construction and concrete curing period is 10 days. This is not only costly and long cycle, but also a wet operation. It will also cause traffic jams during the maintenance period. These...

AI Technical Summary

Problems solved by technology

However, this platform-capped inspection well is mainly divided into well base, wellbore, well seat, well ring, cap and well cover. The structure of the entire inspection well is relatively complicated, the cost is high, and the construction is more troublesome; its maintenance and calibration requires the use of jacks. Moreover, it can only raise the sinking inspection well, and it is difficult to maintain the inspection well that is protruding due to the lowering of the ground.

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