基岩标的施工技术探讨与实践

Discussion of Construction Technique of Bedrock Bench Mark and the Practice

摘要:

基岩标是指在覆盖有松散地层的区域内为更准确测定地面沉降量，穿过覆盖层埋设在稳定基岩上的标杆直通地面，经过保护处理作为相对稳定的基岩水准点。具有标孔要求高、基岩面判层准确、标杆安装要求高等特点。通过浙江省宁波市2座基岩标施工的实践，探讨了确保基岩标质量的关键技术和控制措施，对实际施工有一定的参考作用。

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.