The study on the shear behavior trial of concrete small-sized hollow block masonry has promoted the potentiality in perspective of shear strength of double rows of blind-hollow of concrete small-sized block masonry structure, which will solve the problem of hollow block masonry cracking.

The article analyzes the construction of the reciprocator and the feature of the ball bearing in detail, proposes to solve the out-line question with two-row method and introduces the renovation method.

Numerical simulation on soil pressure of double-row pile retaining structures;

Analysis on stressed deformation and affected factors of double-row pile retaining structure;

With plain strain finite element method,the characteristic of double-row pile of excavation of foundation pit in soil clay is studied.

The engineering application and performance study of double-row piles supporting structure;

Application of double-row piles in deep softclay foundation pit;

Structure design of retaining structure of double-row piles and its application for a deep foundation project;