Communication pipeline man hand hole downhole operation construction method

Abstract

The invention discloses a communication pipeline man hand hole downhole operation construction method. The method includes the following steps that the construction axis, the position and the elevation of a man hand hole are retested; the influence quantity of the settling volume on all part structures of the man hand hole is estimated; bricks are checked and maintained; the man hand hole is dug,the hole is broached, accumulated water is drained, and an envelop structure is constructed; a ventilating cloth curtain is arranged; toxic gas is subjected to segmented sampling detection; and the strength of the envelop structure, the downhole oxygen quantity and the harmful gas residual quantity are regularly detected. According to the method, the structures of the man hand hole are correspondingly subjected to design treatment according to the estimated settling volume in order to reduce the influences of the settling volume, it can be guaranteed that the construction strength stability ofthe man hand hole is high, by means of the ventilating cloth curtain, gas in the man hand hole can be exhausted through natural wind in a circulating manner, and the downhole operation safety of construction staff is guaranteed.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a construction method for underground manhole operation of a communication pipeline. Background technique [0002] With the development of urban communication construction, underground construction of pipelines has gradually increased, and incidents of poisoning and suffocation of construction personnel during underground operations also occur from time to time. Common toxic gases in manholes of communication pipelines are carbon monoxide (coal gas) and hydrogen sulfide. General manhole wells are ventilated mainly by opening manhole covers and using natural wind to blow out the gas in manhole wells to achieve the purpose of ventilation. With the development of the city, the expansion of roads, and the elevation of roadbeds, a large number of manhole wells have been kept at the same level as the road by lengthening the "neck of the well". As a result, the natural wind can on...

AI Technical Summary

Problems solved by technology

Common toxic gases in manholes of communication pipelines are carbon monoxide (coal gas) and hydrogen sulfide. General manhole wells are ventilated mainly by opening manhole covers and using natural wind to blow out the gas in manhole wells to achieve the purpose of ventilation. With the development of the city, the expansion of roads, and the elevation of roadbeds, a large number of manhole wells have been kept at the same level as the road by lengthening the "neck of the well". As a result, the natural wind can only blow the gas at the edge of the wellhead, and cannot blow the man's hands at all. Under the well, it is still impossible to ensure that the toxic gas in the downhole is completely removed during the downhole operation, which threatens the safety of the operators in the downhole operation, and the existing downhole construction process of the manpower hole lacks the settlement of the manpower hole. The control of the construction personnel is vulnerable to the threat of collapse during underground masonry operations