| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a starting pit mouth device for a rectangular box culvert jacking method, which enables water sealing to be safely and surely applied to four corner parts. <P>SOLUTION: A starting pit mouth device for a rectangular box culvert jacking method comprises: a rectangular cross-section mounting bracket 2 that has dimensions larger than dimensions of an outer shell of a rectangular leading body 10 fixedly provided on a starting shaft wall 11; an auxiliary rectangular-cross-section water sealing plate 4 that has a rectangular hole with dimensions smaller than dimensions of the outer shell of the rectangular leading body 10 attached to a back end of the mounting bracket 2; a rubber water sealing plate 5 that has a rectangular hole with dimensions smaller than the dimensions of the outer shell of the rectangular leading body 10 attached in an abutting state to the rear of the auxiliary water sealing plate 4 and larger than the dimensions of the rectangular hole of the auxiliary water sealing plate 4; and a fixing plate 8 for holding and fixing the auxiliary water sealing plate 4 and the rubber water sealing plate 5. <P>COPYRIGHT: (C)2012,JPO&INPIT |
