Within the scope of (1) building plot (residential areas, public buildings, areas, factories, etc.), urban and rural municipal, industrial parks, urban renewal and other range of buried plastic drainage pipes outside diameter of not more than 1200mm, burial depth of not more than 8m plastic drain Manhole engineering design, construction and maintenance. Plastic inspection wells under construction (2) General soil, soft soil soil, seasonal permafrost soil and loess soil conditions; (3) the degree of seismic crack set of 9 degrees and 9 degrees below region. (4) general lane ground load by the total vehicle weight 15t (rear pressure 5t); load by ground fire road cars total weight 30t (rear pressure 6t) design. (5) the ground water table by not more than 1.0m design. Features: 1, acid, corrosion resistance, aging, long service life. 2, using high-performance rubber seals flexible plug-type connection, good sealing performance, can effectively prevent water leakage, protect groundwater sources. 3, manholes and pipe joint motion, uniform settlement, to solve the problem of uneven settlement of traditional brick and plastic pipe connections well produced. 4, smooth wall smooth, easy dirt retention, reduce possibility of clogging the drainage performance is greatly enhanced. 5, light weight, easy to transport, all-weather construction, weather factors, the construction safety convenient, and lower total cost. 6, suitable for urban roads, highways, factories, utilities and living quarters of rain and sewage drainage projects. Zhengzhou City-source Plastic Co., Ltd. is the largest and most professional in Central disposable injection molded plastic manholes Supplier Website: www.yayuanjcj.com www.yysj88.com