Microtunneling Bradshaw Company Maryland TUNNELING SPECIALISTS SINCE 1963      
 

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  324 - Cohas Brook Interceptor - Phase 1

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Shaft Work Concrete Caisson Manchester, NH City of Manchester Soft Ground 10' & 14' Ø
SUMMARY: As part of a microtunneling sewer project, Bradshaw constructed two caisson shafts/manholes, 10' diameter and 14' diameter. The caissons were constructed of precast segments and fitted with steel cutting shoes, bentonite & grout lines. They were sunk under their own weight, by excavating the spoils with a crane & clam bucket. The lower portions were excavated subaqueously and the bottom slabs... Complete Project Profile