Experimental Study of Influences of Initial Temperature on Cement Grout Performance

Yang, Jin Chao; Wang, Wan Peng; Wang, Shu Guang; Chen, Jian Hua; Wei, Yang

doi:10.4028/www.scientific.net/amr.1095.242

Cited by 2 publications

(1 citation statement)

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“…Second, during construction of JP3, the pressure of the ultra-high-pressure grouting pump According to the relevant research results [26,27], as the environmental temperature decreases, the cement hydration rate decreases and the cement hydration products, which are lapped and bonded together, are easily precipitated. These factors reduce the fluidity of the cement slurry and increase the friction between the cement slurry and the pipes, causing the cement slurry to lose pressure.…”

Section: Equipment Failurementioning

confidence: 99%

Field Study on the Waterstop of the Rodin Jet Pile Method in a Water-Rich Sandy Gravel Stratum

Guan

Yang

2019

Applied Sciences

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Due to the increasing depths of underground urban construction, the surrounding environment and hydrogeological conditions are becoming increasingly complex, and conventional high-pressure rotary jet grouting has become unable to meet construction needs. At present, Rodin jet pile (RJP) ultra-high-pressure rotary jet grouting has been widely used as a grouting reinforcement method for deep and large foundations in silty soils, fine sands and clay strata; however, there have been no successful applications in a sandy gravel stratum with high water content (namely, water-rich sandy gravel stratum). Therefore, this paper uses the ventilating shaft in a section of the Beijing Metro as the construction background to carry out field tests on the RJP ultra-high-pressure rotary jet grouting method and waterstop in a water-rich sandy gravel stratum. Through a series of experiments monitoring the formation deformation and pore water pressure and exposing the pile diameter, pile occlusion, pile strength, and permeability of the test pile construction process, it is believed that, for the RJP ultra-high-pressure construction method in a water-rich sandy gravel stratum, reliable jet solidification can occur, the joint between jets can be achieved, the solid strength can reach 10 MPa or higher, and the permeability coefficient can reach 10−8 cm/s. Therefore, RJP ultra-high-pressure rotary jet grouting can be applied as a waterstop method in water-rich sandy gravel stratum.

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Section: Equipment Failurementioning

confidence: 99%