Research on Deformation Law of Deep Foundation Pit of Station in Core Region of Saturated Soft Loess Based on Monitoring

Wang, Xueyan; Song, Qiyu; Gong, Hang

doi:10.1155/2022/7848152

Cited by 26 publications

(12 citation statements)

References 21 publications

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“…Through numerical calculation and field measurement, the abnormal change of the seepage field caused by the seepage point was obtained [ 12 ]. Wang et al studied the influence of deep foundation pit excavation on foundation pit deformation in saturated soft loess areas through a field test on deformation characteristics of deep foundation pit in saturated soft loess areas with a high water level and clarified the deformation laws of foundation settlement, envelope structure, and supporting axial force [ 13 ]. DL adopts an unsupervised layer-by-layer training algorithm to realize the effective expression of data feature information and has strong nonlinear data fitting ability.…”

Section: Introductionmentioning

confidence: 99%

Deformation Analysis and Research of Building Envelope by Deep Learning Technology under the Reinforcement of the Diaphragm Wall

Wang

Zhao

2022

Computational Intelligence and Neuroscience

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The safety analysis of underground buildings is the most crucial problem in the construction industry. This work aims to optimize the safety analysis results of the underground building envelope and comprehensively improve the safety of the underground building. Long short-term memory (LSTM) can make long-term and short-term predictions, thus reducing the model’s prediction error. Applying it to the deformation analysis, data prediction of the underground building envelope can improve the accuracy of the deformation prediction of the envelope. This work deeply discusses deep learning technology and the principle of the LSTM model. Based on the safety analysis concept of the underground building envelope, LSTM underground building envelope deformation’s prediction model is established and comprehensively evaluated. The results show that in the prediction of horizontal displacement of foundation pit pile of diaphragm wall, the mean relative error (MRE) of the prediction results of the designed model range in 10%–18%, and the calculation time ranges 15–36 s. In the settlement displacement prediction, the model’s MRE is within the range of 5%–7%, and the calculation time is within the range of 17–40 s. With the increase of training times, the prediction accuracy of the model increases, and the calculation time becomes relatively stable. Compared with other models, the relative error of prediction results is about 5.4% at the highest and 1.8% at the lowest. This work provides technical support for improving the safety prediction accuracy of the underground building envelope and provides some reference value for the comprehensive development of the underground building industry.

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Section: Introductionmentioning

confidence: 99%

Deformation Analysis and Research of Building Envelope by Deep Learning Technology under the Reinforcement of the Diaphragm Wall

Wang

Zhao

2022

Computational Intelligence and Neuroscience

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“…established the discrete element model of connecting aisle excavation of the same size, and studied the surface settlement during shield excavation and the particle coordination number in the soil before the excavation. Many other scholars have also done a lot of work in the field of construction technology and risks of connecting aisle (Pei and Tao, 2011;Pei et al, 2013;Han et al, 2015;Li et al, 2015;Li et al, 2019;Wang et al, 2020a;Wang et al, 2020b;Wu et al, 2020;Yuan et al, 2020;Zhang and Zhong, 2020;Yuan et al, 2021a;Yuan et al, 2021b;Dai and Hu, 2021;Du et al, 2021;Ting et al, 2021;Wang and Meng, 2021;Zhang et al, 2021;Yuan et al, 2022a;Yuan et al, 2022b;Yuan et al, 2022c;Kun et al, 2022;Liu et al, 2022;Pei et al, 2022;Wang et al, 2022;Yang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Construction applicability of mechanical methods for connecting aisle in the bohai mudstone stratum with high water pressure

Zhang

et al. 2023

Front. Earth Sci.

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China’s traditional connecting aisle construction technology is mainly to combine soil reinforcement with mining excavation. The technology is relatively mature, but it has shortcomings such as long construction period and long-term construction settlement. In order to overcome the above shortcomings, mechanical methods for connecting aisle technology has become increasingly mature after years of research and development, and has been successfully applied in many areas. For the cross-sea tunnel project, this technology was first tried and applied in the interval tunnel of Qingdao Metro Line 8. It is challenging to construct the connecting aisle by mechanical method in Bohai mudstone stratum with high water pressure, which has the construction difficulties such as high excavation requirements, high requirements for post-support function and limited space of main tunnel. In this study, a cutter, propulsion system, and back supporting system were designed to handle the key and difficult points and risks of the aforementioned construction. Furthermore, targeted construction schemes were adopted for sleeve sealing, sleeve removal, and improvement of sleeve sealing. The applicability of the improved mechanical construction method to the geological conditions of the Qingdao area was verified through a numerical simulation. The research results can provide a reference for the mechanical construction of connecting aisle under similar formation conditions.

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“…During the application of EPB shield in water rich sand layer, the determination of shield tunneling parameters is very challenging due to the problems such as low arched efficiency of surrounding rock, high pore pressure, and easy collapse of tunnel working face [1][2][3]. If the construction parameters are set improperly, it is difficult to ensure the safety of the existing structure when the shield machine needs to pass through major risk sources.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Shield Tunneling Control in Full Section Water-Rich Sand Layer of Collapsible Loess

Mei

Zhang

et al. 2022

Geofluids

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Taking China’s first application of domestic shield tunneling in a water-rich sand layer for crossing a high-speed railway as research background, the influence of changes in the shield tunneling parameters on ground settlement is analyzed based on field tests, and a construction control method suitable for shield tunneling under a risk source in a water-rich sand layer is proposed. The test results show that the use of 10% sodium bentonite as the soil modifier for soil pressure balance shield tunneling into the water-rich sand layer has advantages, while adding 50% loess into the bentonite slurry in the gravel sand layer can greatly improve the impermeability of the soil; the settlement of soil can be effectively reduced by using the special segment with grouting holes for deep grouting and applying the adaptive transformation of the shield cutter. Based on the statistical analysis results, a reasonable range for the cutter head torque, cutter head speed, chamber pressure, bentonite injection volume, and advanced speed in the water-rich sand layer can provide a construction control basis for similar projects and provide data support for the compilation of relevant specifications.

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Research on Deformation Law of Deep Foundation Pit of Station in Core Region of Saturated Soft Loess Based on Monitoring

Cited by 26 publications

References 21 publications

Deformation Analysis and Research of Building Envelope by Deep Learning Technology under the Reinforcement of the Diaphragm Wall

Deformation Analysis and Research of Building Envelope by Deep Learning Technology under the Reinforcement of the Diaphragm Wall

Construction applicability of mechanical methods for connecting aisle in the bohai mudstone stratum with high water pressure

Experimental Study on Shield Tunneling Control in Full Section Water-Rich Sand Layer of Collapsible Loess

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