Zhejiang University

Yanguo Zhou

Bo Huang

Yunmin Chen

Kai Liu

Qiang Ma

Jianqun Jiang

Daosheng Ling

Weian Lin

Peng Xia

Xinhui Zhou

Yubing Wang

Haibo Xie

Provided is a three-directional motion decoupling periodic structure for a shaking table container. The periodic structure is formed by sequentially superimposing n periodic structure units, wherein each of the periodic structure units is formed by sequentially superimposing a first side-confining layer, a planar decoupling layer, a second side-confining layer and an elastic layer, wherein n is a positive integer greater than or equal to 2; the cross-sectional shapes of the first side-confining layer, the elastic layer, the second side-confining layer and the planar decoupling layer are the same; and the periodic structure is used for implementing three-directional motion decoupling in the operating condition of ground shaking. Further provided is a three-directional motion decoupling container for shaking table test, which is formed by combining the periodic structure, a container base plate and a position-limiting protection door-type frame (). The container, which is light in weight and high in strength, is applicable to the shaking table tests at hypergravity and normal gravity. Multiple measures are taken to ensure the motion synchronization between the container and tested soil, the non-interference of the motions of the container and the tested soil in the three directions of X, Y and Z, no extra acting force being exerted on the tested soil by the container, and the avoidance of a boundary effect as much as possible, so as to fully realize the three-directional decoupling and reconstitute original site characteristics.

Tri-axial motion decoupling periodic structure for shaking table container

The disclosure discloses a high-performance liquefaction mitigation method forstone columns for protecting the existing buildings during earthquakes. Specifically, a small equipment is used to dig trenches in the soil around the existing building. Then, a spiral driller is used to drill a series of boreholes in the trenches according to the optimized borehole design. Next, two or three layers of optimized gravel material with high permeability are filled into the boreholes to work as the inverted layer. Finally, geotextile is arranged around the trench and the trench is filled with the optimized gravel. Compared with current liquefaction mitigation methods for existing buildings, the disclosure is suitable for liquefaction mitigation in large cities, and has the advantages of low disturbance to the overlaid building, simple construction process, high construction efficiency, low construction cost, long service life and the construction material could be easily obtained.

High-performance liquefaction-resistance treatment method for gravel pile of existing building foundation

Growing community of inventors

Hangzhou, China

Yanguo Zhou