The drilling construction experience of mud and sand seam

Combined with the survey and geologic background of concrete project,it introduces the construction preparation,construction method,and construction gradation in the drilling construction in this project,analyzes the reasons generating the common problems in the water-seal process with purdah,and represents the corresponding solving methods in order to ensure the project quality.

In view of difficulties encountered in pile foundation construction process of bridge in Chongyang reservoir,from the erection of working platform,embedment of steel casing,drilling construction and other aspects the construction of pile foundation in deep water and in riverbed without overburden is introduced.

Through the drilling machine types used in a certain bored pile construction in Fuzhou,this article makes a simple introduction about the drilling machine,and chiefly discussed the problems and their causes in construction.

Design method of key structure parameters of broaden chippings distributor used in road construction;

Betimes character of detection in road construction;

Aiming at present status quo in which the road measurement is asynchronous with construction and based on the technical features of auto-tracking and dynamic measuring by measuring robot,this paper suggests the principle and method of dynamic control for road construction via measuring robot.