Correction of Earth Pressure and Analysis of Deformation for Double-Row Piles in Foundation Excavation in Changchun of China

Zhou, Yijun; Ye, Aijun; Li, Haobo; Zheng, Xuan

doi:10.1155/2016/9818160

Cited by 10 publications

(11 citation statements)

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“…As shown in Figures 6(a) and 6(b), the bending moment of test pile 2 was still significantly smaller than that of test pile 1. e maximum negative bending moment of test pile 2 was reduced from −7.94 kN•m to −2.78 kN•m, which was similar to the changing trend of the bending moment of test pile 1 and consistent with the results of Zhou et al [24] e bending moment at anchor cable position was always small, without the phenomenon of sudden increase. is is because BL1∼BL4 were installed in time during the construction of the second-order excavation.…”

Section: Advances In Civil Engineeringsupporting

confidence: 90%

“…Most of the previous studies have investigated the mechanical characteristics of double-row piles through theoretical calculation [12,17] and numerical simulation [18][19][20], and some scholars studied the stress characteristics of double-row piles through the laboratory model test [21,22]. However, due to the complexity of the construction site, theoretical calculation and numerical simulation values cannot fully reflect the real stress characteristics of the double-row piles, and the measured values from field tests are more realistic [23,24].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Bending Moment of Double‐Row Steel Pipe Piles in Foundation Excavation

Zhang

Shujuan

et al. 2020

Advances in Civil Engineering

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Double-row steel pipe piles have been widely used in retaining and protection of foundation excavation because of the advantages of high bearing capacity, high flexural rigidity, fast construction speed, and so on. This study presents a field test to assess the feasibility of strain gauges in monitoring the strain of double-row steel pipe piles during foundation excavation. Two steel pipe piles were instrumented with strain gauges and then installed into the drilling holes. The installation method of strain gauges is introduced first. Then, the bending moment of the test piles during the foundation excavation was analyzed. The field test results indicate that the survival rate of strain gauges was 100%, and the monitoring method used in the test was feasible to measure the bending moment of double-row steel pipe piles. Moreover, with the increase in foundation excavation depth, the bending moment of the test piles all increased, and the bending moment of the inner pile was obviously higher than that of the outer pile. The bending moment distribution of the whole support system accords with the conventional pile-anchor mode. The test results can provide reference and basis for the design and construction of double-row steel pipe piles.

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Section: Advances In Civil Engineeringsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Experimental Study on Bending Moment of Double‐Row Steel Pipe Piles in Foundation Excavation

Zhang

Shujuan

et al. 2020

Advances in Civil Engineering

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“…All of the above studies are based on the traditional double-row pile support structure, and there is less research on the optimization and improvement of the traditional support structure [11][12][13][14][15][16]. It is also short of comparison of mechanical properties for supporting structures and some in situ studying [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Research on the Mechanical Properties of New Double‐Row Pile Supporting Structure Based on an In Situ Study

Zhou

Liu²,

Wang³

2021

Shock and Vibration

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According to the force characteristics of the double-row pile supporting structure, two new types of double-row piles are developed: the prestressed strong-constrained double-row piles and the recycling assembled double-row piles. A comparative field test was conducted on the support effects of the two new double-row piles and conventional double-row piles. The test site is located in a deep foundation pit of the Beijing Daxing International Airport Project. The feasibility and reliability of the two new support structures are verified. Field monitoring included section strain and bending moment of the pile body, horizontal displacement of the pile body, and vertical and horizontal displacement of the pile top. The research shows that because of the prestressed anchorage cables in the rear row piles, the prestressed strong-constrained support structure can provide better tensile performance from the rear piles, and the deformation and displacement are minimal. The recycling assembled double-row piles have similar deformation and displacement to the conventional piles. Through the connection of the steel members, the construction time can be effectively shortened. After the backfill of the foundation pit, the steel members can be recycled and the cost can be reduced.

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“…e displacement-induced skin friction and tip resistance to existing piles located near the excavation area are always calculated using hyperbolic models [9][10][11][12][13] or nonlinear models [14][15][16][17]. Multiple new methodologies have been proposed to estimate or predict the responses of existing piles to new excavations via theoretical and numerical simulations [18][19][20][21][22][23]. is paper presents a methodology to predict the responses of existing floating piles to adjacent deep excavation in soft clay.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Response of Existing Building Piles to Adjacent Deep Excavation in Soft Clay

Liang

Liu

et al. 2019

Advances in Civil Engineering

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This study investigates building settlements near excavations in soft clay. A simplified theoretical method is proposed to predict the additional settlements and axial forces of excavation-adjacent existing building floating piles in soft clay. The soil displacement is simplified as a line or broken line along the depth direction, depending on the distance from the excavation. A hyperbolic model is applied to calculate the skin friction and tip resistance induced by the vertical soil displacement. The parameters of the hyperbolic model are corrected to fit data from in-service piles. Based on the load-transfer curve method, the additional settlements and axial forces are determined. The measured data of 17 floating piles from two excavation cases in Hangzhou, China, show good agreement with the calculated values. The results show that the position of the neutral point of the loaded pile varies with the soil settlement. Because of the upper structure, the theoretical settlements for piles near the excavation are larger than those obtained from the measured values; for distant piles, this relationship is reversed. The proposed prediction methodology is expected to guide the design of practical excavations.

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Correction of Earth Pressure and Analysis of Deformation for Double-Row Piles in Foundation Excavation in Changchun of China

Cited by 10 publications

References 0 publications

Experimental Study on Bending Moment of Double‐Row Steel Pipe Piles in Foundation Excavation

Experimental Study on Bending Moment of Double‐Row Steel Pipe Piles in Foundation Excavation

Research on the Mechanical Properties of New Double‐Row Pile Supporting Structure Based on an In Situ Study

Prediction of Response of Existing Building Piles to Adjacent Deep Excavation in Soft Clay

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