Taking the construction of Qingnian Avenue Station as example,the author presents such measures as the surface treatment of the utility pipelines,the control of the construction settlement and the advance ground consolidation that are taken during construction in order to protect the utility pipelines and to guarantee the construction safety.

We discuss the rheological properties, sedimentation process and fractal trait of nano-SiO_2 suspensions.

At present, the existing problems of subsidence process in our country's sugar mills are the long retention time of juice in subsider, which easy to cause the sucrose inverted resulting in much loss of sucrose, and the worse quality of clarified juice, the less density of mud juice.

In the light of the problem of concrete freeze-thaw in extremely cold area, and starting from the mixture ratio, this paper probes into improving the frost durability by mixing admixture, and improves the concrete frost resistance by adding some measures of construction process control.

The paper introduces the pile trial, construction preparation, construction procedures, design parameters and requirements, construction process control, quality check of super sulfate res.