And the circumferential stresses of the diversion waterway s 8 cross-sections which are along the water flow,the normal stresses around the gate slot,the circumferential stresses aroun.

Through analysis about the polyethylene pipes in hydrostatic strength testing,the formula of axial,radial and hoop stress were inferred.

A calculation formula of limit to growth length when grout body cracked is deduced from the hoop stress of wholly bonded prestressed cable grout body,which is concurred between the hoop tension stress is created by pretension and the uniformly corrosion expansion force by cable body.

Adopting the general finite element computation software to analyze symmetry Y-type reinforced concrete bifurcation pipe in Hydropower Station, this paper has calculated annular stress and distortion distribution of reinforced concrete bifurcation pipe, and analyzed the influence that indide hydraulic pressure has on bifurcation pipe wall rock.

Study on the strengthening of NiTi SMA ring pre-stress concrete structure;

Study of techniques for ring pre-stress of super-long tubes;

The distribution of ring pre-stress, anchoring steel beam and pre-stress, vertical pre-stress of the anchoring zone of the main tower in Songhuajiang cable stayed bridge are introduced and the corresponding construction technologies are clarified in the paper.

Scene measurement of strengthening process shows the maximum of circumferential compression stress produced by chimney wall s concrete can reach the value of 1.