Discussion of Construction Technique of Bedrock Bench Mark and the Practice

Abstract:

Bedrock bench mark is a buried pole across the loose overburden layer to the stable bedrock for the accurate monitoring of land subsidence, which is with the characteristics of high requirement on mark hole and mark pole construction and accurate bedrock surface deciding. Based on the practice of 2 bedrock bench mark construction in Ningbo, discussion was made on the key technologies and control measures to ensure the quality of bedrock bench mark.