Abstract
Jiangshan road (Lianhuo high-speed road— Yellow River scenic spot) is an urban arterial road (including main roads and eastern auxiliary lane) with north and south direction located in northern of Zhengzhou，Type DN500 ductile iron pipes need to be through the present green loop road until Luyuan road as well as S314 to Kuhe bridge section. Currently there are existing trash earthwork and original green forest for more than 50,000 Cubic meters from green loop road to Luyuan road, and also there are existing houses from S314 to Kuhe bridge, even difficult to implement demolition and reinforcement, so the construction difficulty is too hard.
According to the reconnaissance situation and the relevant requirements of zhengzhou municipal administrative department, in order to ensure the using security of water system, they don't agree with high density polyethylene (HDPE )pipe instead of ductile iron pipes, and as for the deflection of steel pipe is larger, it will not meet the demand of construction if the demolition does not reach the requirements, so here it is approved by investigation and consultation, it will be using the ductile iron pipe with horizontal directional trenchless technology to reduce the impact of construction for environment and living.
Key words: water pipe; ductile iron pipes with horizontal directional trenchless technology
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