Experimental study on multi-bench retaining foundation pit

被引：0

作者：

Zheng G. ^{[1
,2
]}

Nie D.-Q. ^{[1
,2
]}

Cheng X.-S. ^{[1
,2
]}

Diao Y. ^{[1
,2
]}

Liu J. ^{[1
,2
]}

机构：

[1] MOE Key Laboratory of Coast Civil Structure Safety, Tianjin University, Tianjin

[2] Department of Civil Engineering, Tianjin University, Tianjin

来源：

Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2017年 / 39卷 / 05期

关键词：

Deformation; Earth pressure; Failure mechanism; Foundation pit; Model test; Multi-bench retaining;

D O I：

10.11779/CJGE201705002

中图分类号：

学科分类号：

摘要：

In deep excavations with a large area of soft soil, the multi-bench retaining method, which has a short construction period and doesn't need any horizontal reinforced concrete struts, can be used to replace the method with reinforced concrete struts. This method has been used in some regions of China. Because of the lack of researches on the multi-bench retaining method, a serious of model tests are designed to learn its work and failure mechanism. The main parameters, width of the bench between retaining piles B and length of the second retaining pile L2, are studied. The test results show that the multi-bench retaining structure has three kinds of failure modes, the overall overturning failure, the mutual-effect failure and the separate failure, according to different widths of the bench between retaining piles. The main differences of these failure mechanisms are the range of the slip surface and the stress condition of the soil between retaining piles. As the width of the bench increases, the deformation and moment of the retaining piles decease and have better stability. The second retaining pile will become the main retaining structure, which means that the second retaining pile bears a larger moment than the first one, with a long second retaining pile. The increase of L2 can also decrease the displacement of the first retaining pile and improve the stability. © 2017, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.

引用

页码：784 / 794

页数：10

共 17 条

[1]

Zheng G., Guo Y.-B., Nie D.-Q., Et al., Theory of multi-bench retaining for large area foundation pit and its engineering application, Rock and Soil Mechanics, 35, pp. 290-298, (2014)

[2]

Ren W.-D., Li C.-G., Tian J.-P., Et al., Rapid construction method of large area deep foundation excavation in soft soil, Construction Technology, 42, 1, pp. 35-39, (2013)

[3]

Ren W.-D., Zhang T.-X., Zhang D.-M., Et al., Parametric analysis of failure modes and stability of multi-level retaining structure in deep excavations, Chinese Journal of Geotechnical Engineering, 35, pp. 919-922, (2013)

[4]

Zheng G., Cheng X.-S., Diao Y., Analysis of the stability and collapse mechanism of non-prop and multi-stage retaining structure, Journal of Tianjin University(Science and Technology), 46, 4, pp. 304-314, (2013)

[5]

Frydman S., Keissar I., Earth pressures on retaining walls near rock faces, Journal of Geotechnical Engineering, ASCE, 113, 6, pp. 586-599, (1987)

[6]

Take W.A., Valsangkar A.J., Earth pressures on unyielding retaining walls of narrow backfill width, Canadian Geotechnical Journal, 38, 11, pp. 1220-1230, (2001)

[7]

Ying H.-W., Huang D., Study on active earth pressures on translation retaining wall adjacent to existing basements, Chinese Journal of Solid Mechanics, 32, pp. 356-360, (2011)

[8]

Ying H.-W., Huang D., Xie X.-Y., Study on active earth pressure on retaining wall subject to translation considering lateral pressure of adjacent existing basement wall, Chinese Journal of Rock Mechanics and Engineering, 30, pp. 2970-2978, (2011)

[9]

Zhao Q., Zhu J.-M., Research on active earth pressure behind retaining wall adjacent to existing basements exterior wall considering soil arching effects, Rock and Soil Mechanics, 35, 3, pp. 723-728, (2014)

[10]

Jin Y.-B., Liu J.-B., Discussion on calculation method of earth pressure of earth-strip between neighboring excavations, Rock and Soil Mechanics, 30, 12, pp. 3761-3764, (2009)

← 1 2 →