Abstract:It is necessary to adopt safe monitoring and measuring in tunnel construction. The construction measured results of marked tunnel section 57–61 of drainage system of the tender CQWW2.01 in Chongqing City are presented. Based on the analysis of the measured results,the basic methods of supervisory measurements on tunnel construction under the complex conditions that surrounding rocks are mainly sandy clay are introduced;and the basic deformation regularity of similar tunnel and ground are also summarized. The achieved experience and data can be for reference to the construction and research of similar tunnels.