Other

Powerchina Huadong Engineering Corporation Limited

Wenhua Chen

Jing Hou

Haifeng Qi

Jie Zhang

Guanye Wu

Caiyun Huan

Bo Jin

Zhenqian Jiang

Yongyong Zhang

Yangchun Dai

Guobin Wang

Kewei Cui

Zhenqiang Jiang

The invention relates to a device for soft soil foundation treatment by vacuum-membrane-free vacuum preloading and a treatment method. The device comprises includes several top plates for being laid on the surface of soft soil foundation and several vertical plates for being vertically driven into the soft soil foundation, wherein the vertical plates are driven against the symmetrical side edges of the top plates; the vertical plate has an inner chamber, the top surface of the vertical plate is provided with a vertical plate main-hole in communication with the inner chamber of the vertical plate, both sides of the vertical plate are provided with several vertical plate vacuum mini-holes in communication with the inner chamber of the vertical plate; the vertical plate main-hole is in communication with vacuum equipment. The invention is applicable to applicable to the field of geotechnical engineering techniques.

Device for soft soil foundation treatment by means of vacuum-membrane-free vacuum preloading and treatment method

The present invention relates to an apparatus for soil disturbance at the back of a shield tunnel, wherein: the apparatus is formed by a fitting I and a fitting II connected by means of three bolts that form equal angles; the fitting I is a short circular pipe; an end surface of a fitting end of the fitting I is provided with a water passage; a pipe wall of the pipe is provided with 2-8 water spouts; the fitting II is a long circular pipe whose inner and outer diameters are consistent with those of the fitting I; a fitting end of the fitting II is provided with two O-shaped water stop rings; a pipe wall of the fitting II is provided with three water inlets that form equal angles and are in communication with the water passage of the fitting I.

Device for back soil disturbance in shield tunnel

The present invention provides a method for tackling the repelling of hammering during pipe pile driving. The technical scheme of the present invention includes: when repelling of hammering occurs in the process of piling through a sand layer, drill holes downwardly around and/or inside the pipe pile, and jet high-pressure water to the sand layer below to cut and disturb the sand layer.

Method for tackling repelling of hammering during pipe pile driving

The invention relates to a method to test friction resistance at inner and outer sidewalls of pipe pile through in-situ test. The method comprises embedding a strain sensor at inner or outer sidewalls of pipe pile to measure strain variation generating on pipe pile body under the action of load; carrying out static load test with the soil plug remaining in the pipe pile to obtain the strain variation &#x3b5;of the pipe pile body at the isoil layer; taking out the soil plug remaining in the pipe pile and carrying out static load test to obtain the strain variation &#x3b5;of the pipe pile body at the isoil layer; and obtaining the friction respectively at the outer and inner sidewalls of the pipe pile at the isoil layer according to the measured strain variation, &#x3b5;and &#x3b5;.

Test method for friction resistance at inner and outer sidewalls of pipe pile

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Hangzhou, China

Wenhua Chen