Entity

Time filter

Source Type


Liu Y.-C.,Tianjin University | Liu Y.-C.,Tianjin Construction Inheritance Group Ltd Company | Zheng G.,Tianjin University
Yantu Lixue/Rock and Soil Mechanics | Year: 2011

Through the statistical analysis of the pipe piles' vertical bearing capacity tests in the soft soil area, according to the pipe pile foundation which mainly bears vertical load, we can find that more than 70% of the pipe piles' actually vertical bearing capacity were less than 50% of the ultimate strength; and it failed to get full use of the high material strength of the pipe pile. The purpose of this study is to improve the work process of the pipe pile, in order to improve its bearing capacity. By the method of prototype test, this paper presents a kind of enlarged grouting pipe pile patent which is suitable for soft soil area. We can set the endplate's diameter greater than the pile's diameter, which can form a space surrounding the pile larger than the pile's diameter while the pile was sinking, and we can use cementitious materials, such as the surplus grout, to jet grout into that space; then reaming grouting pipe pile is formed. Through thirteen test piles' vertical compression tests, tension tests, and horizontal force full scale tests, it is shown that this process significantly increased the resistance of the piles' tips and the soil surrounding the piles; and in this way the pipe piles' vertical bearing capacity and lateral stiffness can be improved. And this type of pile has been applied to a practical project, and good social and economic benefits are achieved.


Liu Y.-C.,Tianjin Construction Inheritance Group Ltd Company | Wang Q.-L.,Tianjin Construction Inheritance Group Ltd Company | Wang Q.-L.,Tianjin Chengjian University | Zhu M.-L.,Tianjin Construction Inheritance Group Ltd Company | Zhang Y.-L.,Tianjin Construction Inheritance Group Ltd Company
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2014

The steel jet grouting pile is a type of the SMW method. It can be applied to the buildings in which the environment is complex and the workspace is small. Based on engineering example, the action mechanism, design and construction control points of this method are summaried, according to the monitoring data of deformation of retaining structure which adopts the steel jet grouting piles and reinforcement in the passive zone of the foundation pit.


Liu Y.,Tianjin Construction Inheritance Group Ltd Company | Zhu M.,Tianjin Construction Inheritance Group Ltd Company | Wang Q.,Tianjin Construction Inheritance Group Ltd Company | Wang Q.,Tianjin Chengjian University | And 2 more authors.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2015

The prestressed rectangular supporting pile is a new type of precast pile for deep foundation pit engineering. Compared with the traditional tubular pile and cast-in-place pile, it has a good pile quality, big bending stiffness, convenient construction, green environmental protection. It has now been applied in practical engineering. Combining with the engineering example, prestressed rectangular supporting pile has been applied in new campus project of Nankai University. According to the design selection, monitoring and analysis of soil squeezing effect in the construction process and excavation verification, summarize the technology points of the design, construction and monitoring. ©, 2015, Editorial Office of China Civil Engineering Journal. All right reserved.

Discover hidden collaborations