The new retaining wall structure of cantilever prestressed SMW construction method is a new type of foundation pit support composed of inserting profile steel in the front of the cement soil retaining wall, setting vertical prestressed anchor cable in the back, and setting rigid reinforced concrete cover beam between the two. To clarify the mechanical behavior of this new type of structure, the stress process is analyzed, the reasonable deformation calculation model is explored, and the deformation control measures are taken. The concrete method is to regard the steel-cement soil composite as a whole component, establish the deformation differential equation and boundary conditions, and the deformation calculations are performed using two algorithms: In algorithm 1, its deformation under the action of pretension prestress is calculated; In algorithm 2, the deformation of the section steel top is calculated by the additional bending moment. Taking the whole construction process of a deep foundation pit as an example, the measured statistical analysis results of the retaining wall show that the theoretical deformation values are basically consistent with the monitoring values, while the deformation values calculated by ignoring the mechanical contribution of cement soil and the effect of prestress according to the current specification is far greater than the monitoring values. Under the same geological and foundation pit depth conditions, the vertical prestressed anchor cable at the back of the new retaining wall structure can effectively increase the stiffness of the retaining wall, exhibiting good deformation resistance and engineering cost performance; The stress analysis method, calculation model and calculation formula of algorithms 1 and 2 can better simulate the actual mechanical deformation of the new retaining wall structure, and provide theoretical support for the application of the new retaining wall in practical engineering.
Lu Yong
,
Yu Jinguang
. Research on the Deformation of a New Type of Cement Soil Retaining Wall with Cantilever Pre-Stressed SMW Construction Method[J]. Chinese Journal of Underground Space and Engineering, 2026
, 22(1)
: 358
-366
.
DOI: 10.20174/j.JUSE.2026.01.37
[1] Wang C, Xu Y F, Dong P. Plate Load Tests of Composite Foundation Reinforced by Concrete-Cored DCM Pile[J].Geotechnical and Geological Engineering, 2014, 32(1):85-96.
[2] 中华人民共和国住房和城乡建设部.型钢水泥土搅拌墙技术规程(JGJ/T199 -2010)[S].北京: 中国建筑工业出版社,2010.(Ministry of Housing and Urban Rural Development of the People's Republic of China.Technical specification for soil mixed wall(JGJ/T199 -2010)[S].China Building Industry Press.(in Chinese))
[3] 管飞,尹 骥,李象范.软土深基坑预应力重力式围护结构的设计与分析[J].岩土工程学报,2006,8(增1):1605-1609.(Guan Fei, Yin Ji, Li Xiangfan.Deep excavation Design and analysis of gravity wall reinforced by vertical prestressed anchors in deep excavation[J].Chinese Journal of Geotechnical Engineering,2006,8(Supp.1):1605-1609.(in Chinese))
[4] 黄翀,吴晓.预应力垂直锚重力式围护结构计算分析[J].建筑结构,2010,40(10):114-116.(Huang Chong, Wu Xiao.Calculation and analysis of gravity wall reinforced by vertical prestressed anchors[J].Chinese Journal of Building Structure,2010,40(10):114-116.(in Chinese))
[5] 徐水根,李象范.预应力垂直锚补偿重力式结构在闹市窄地基坑围护中的应用[J].建筑施工,2005,27(2):1-3. (Xu Shuigen, Li Xiangfan.Application of Gravity-Type Structure Compensated with Prestressed Vertical Anchor to Narrow Foundation Pit Support in Downtown Area[J].Chinese Journal of Building Construction,2005,27(2):1-3.(in Chinese))
[6] 史志远.垂直预应力锚杆式水泥土墙挡墙受力分析计算[J].山西建筑,2011,37(20):74-75. (Shi Zhiyuan.On stress analysis of vertical prestressed anchor cement-soil walls and its calculation[J]. Chinese Journal of Shanxi Architecture, 2011,37(20):74-75.(in Chinese))
[7] 卢勇.一种新型的双排桩支护结构[P].中国专利:20676422, 2024-03-29. (Lu Yong. A New Type of Double-Row Pile Support Structure[P]. China Patent:20676422, 2024-03-29. (in Chinese))
[8] 孔德志,张庆贺,宋 杰.劲性水泥土连续墙的抗弯刚度研究[J].岩石力学与工程学报,2004,23(11):1935-1938. (Kong Dezhi, Zhang Qinghe, Song Jie.Studyon Bending Stiffness of Reinforced Continuous Cemvenelsoiwa[J]. Chinese Journal of Chinese Journal of Rock Mechanics and Engineering, 2004,23(11):1935-1938.(in Chinese))
[9] 周景星,李广信,张建红,等.基础工程[M]. 北京:清华大学出版社,2015.(Zhou Jingxing, Li Guangxin, Zhang Jian hong,et al. Foundation Engineering[M].Beijing:Tsinghua University Press, 2015. (in Chinese))
[10] 谷淡平,凌同华.悬臂式型钢水泥土搅拌墙的水泥土承载比和墙顶位移分析[J].岩土力学,2019,40(5):1957-1965. (Gu Danping, Ling Tonghua, Analysis of bearing ratio of cement soil and displacement at the top of wall for soil mixing wall construction method of cantilever type[J].Chinese Journal of Rock and Soil Mechanics,2019,40(5):1957-1965.(in Chinese))
[11] 中华人民共和国住房和城乡建设部.建筑基坑支护技术规程(JGJ120-2012)[S].北京: 中国建筑工业出版社,2012. (Ministry of Housing and Urban Rural Development of the People's Republic of China.Technical specification for retaining and protection of building foundation excavations(JGJ120 -2012)[S].Beijing:China Building Industry Press, 2012. (in Chinese))
[12] 杨凯丞,吴曙光,廖海成,等.双锚杆受力机制分析及模型试验研究[J].岩土力学,2023,44(增1):495-503. (Yang Kaicheng,Wu Shuguang, Liao Haicheng, et al. Mechanism analysis and model test research on double anchor rods[J].Chinese Journal of Rock and Soil Mechanics,2023,44(Supp.1):495-503.(in Chinese))
[13] 中华人民共和国.岩土锚杆与喷射混凝土支护工程(GB50086-2015)[S].北京: 中国计划出版社,2015. (The People's Republic of China.Technical code for engineering of ground anchorages and shotcrete support(GB50086-2015)[S].Beijing:China Planning Press, 2015. (in Chinese))
[14] 金爱兵,高永涛,蔡美峰,等.挡土墙加固工程锚杆预应力损失与补偿[J].北京科技大学学报,2003,25(3):199-202.(Jin Aibing, Gao Yongtao, Cai Meifeng, et al. Prestress losing and Compensate Method in the Reinforcement Project of Retaining Wall[J]. Chinese Journal of University of Science and Technology Beijing, 2003, 25(3): 199-202.(in Chinese))
