Based on the observation principle of measuring the angular refraction and modeling the local refraction, several major obstacles resulting in no direct measurement for the refraction since always are analyzed,necessary conditio.

We discussed the scaling observation principles of the construction of seismic physical model, as well as design and building of seismic physical model.

Forecast model of salt-frost heaving deformation of sulfate (sulfurous) salty soil and its contrast study with in-situ observation

The micro-fracture mechanism of cast magnesium alloys was investigated based on in-situ observation with scanning electron microscope(SEM).

Analysis on prototype observation on lifting power of spillway tunnel working gate for Tianqiao Hydropower Station;

Summary of two times prototype observation results of roughness coefficient for water diversion tunnel from Luanhe River to Tianjin City;

Analysis on the prototype observation data of Wan anxi concrete face rockfill dam;

Based on the summarization of research on total dissolved gas(TDG) supersaturation,field observation of TDG downstream of Zipingpu dam was taken.

was analyzed based on the field observation of hydrology and sedimentation in 1998 flood season.

Study on deformation of a high-pile wharf slope from field observation;

The prototype measurement of single-step compound reinforced retaining wall with super height;

The prototype measurement of retaining wall reinforced by a new type of wedgy tied reinforcement;

Since 1998, the beginning of the impounding, many types of prototype measurements have been employed and many valued data has been accumulated.