分块预制水泥管沉井,经过在藁城县几年来的实践运用,证实了其优越性。该方法不必将原砖砌早筒挖掉,可在其原来的基础上进行施工。首先预制管径为1.0、1.2、1.4米等不同管径的分块水泥管,壁厚有δ为6～8厘米,高0.3米,组合后的水泥管按圆周方向平分三等份,并带有齿槽,以增加联接强度(如图1所示)。一般要求管材达到 Block prefabricated cement pipe caisson, after years of practical application in Tancheng County, confirmed its superiority. The method does not have to dig out the original brick masonry, in its original basis for construction. First prefabricated pipe diameter of 1.0, 1.2, 1.4 meters and other pipes of different sizes of cement pipe, the wall thickness δ is 6 to 8 cm, 0.3 m high, the combined cement pipe equally divided by the circumferential direction of three equal parts, and with There are gullets to increase the coupling strength (as shown in Figure 1). General requirements for pipe to reach