Hangzhou City University

Lisha Zhang

Xiao Wei

Jinhong Zhang

Hongwei Ying

Yifu Sun

Binghe Li

Chunyan Zhao

Gang Wei

Yunliang Cui

Xinquan Wang

Changju Zhang

Fushen Liu

Zhongxuan Yang

Chaofa Zhao

An auger-suction type metro jet system (MJS) device for aerated and lightweight cement soil includes a multi-pipe device, an outer sleeve, an integrated device, a spiral conveyor, a reamer head, a pressure monitoring system, a mass measuring device, and a control console. The multi-pipe device integrates a backup pipe, a negative-pressure gas pipe, a hydraulic pipe, a negative-pressure water pipe, a pressure sensor wire pipe, a pressure water pipe, a backup gas pipe, a power wire pipe, and at least one grouting tremie unit. The spiral conveyor includes a shaft-type spiral conveying belt and a negative-pressure device. A construction method for foundation reinforcement construction includes: cutting soil by the reamer head; crushing gravel by a gravel crusher; transporting, by the shaft-type spiral conveying belt, a soil-water mixture to a waste liquid tank; monitoring, by the mass measuring device, a mass of the soil-water mixture discharged; and injecting equal-mass cement.

Auger-suction type metro jet system (MJS) device for aerated and lightweight cement soil and construction method thereof

Disclosed is a positioning grouting anchor rod suitable for preventing and controlling an engineering seepage damage and a construction method thereof. The positioning anchor rod comprises an anchor rod, a grouting guide pipe and a grouting pipe. When the seepage failure occurs in the project, a water pump can be connected with a drain pipe interface to realize water drainage, and at the same time, a positioner can be used for positioning grouting in the seepage failure area to improve the accuracy of grouting reinforcement. A drainage channel and a grouting channel involved in the present application are independent of each other and do not interfere with each other, and the drainage and grouting functions are combined on the basis of retaining the original supporting function of the anchor rod.

Anchor rod for positioned grouting suitable for prevention and control of engineering seepage damage and construction method thereof

Provided is a drainage grouting pipe and a method of use thereof. The drainage grouting pipe comprises a perforated steel pipe, a plurality of elastic anti-filtration geotextiles, a movable stopper, and a grouting pipe. The perforated steel pipe consists of a front conical tip, a middle grouting section, a rear hole-free section, and a steel pipe seal. The middle grouting section is provided with a plurality of grouting holes. The surface of the middle grouting section of the perforated steel pipe is seamlessly, and circumferentially wrapped by the plurality of elastic anti-filtration geotextiles, and gaps are formed between adjacent elastic anti-filtration geotextiles. Firstly, the geotechnical layer is drained by a pumping system, and then the grouting position in the geotechnical layer is located and controlled by pulling out the grouting pipe to control the plunging depth of the movable stopper, thus achieving the prevention and treatment of groundwater seepage damage.

Drainage grouting pipe and method of use thereof

Growing community of inventors

Hangzhou, China

Lisha Zhang