Anchor application in Karatepe andesite rock slope, Izmir—Türkiye

Koca, Mehmet Yalçın; Kıncal, Cem; Arslan, Ahmet Turan; Yılmaz, Halil

doi:10.1016/j.ijrmms.2010.11.006

Cited by 22 publications

(8 citation statements)

References 13 publications

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“…e anchor cable stress monitoring adopts the anchor cable dynamometer installed on the anchor cable [31][32][33][34], which is installed in the middle of each edge, the sun corner, and the section with complex geological conditions. Correspondent to the horizontal displacement curve of pile head, the monitoring data (M10, M15, M33, and M45) of the first layer of the anchor cable in different areas were selected for analysis to obtain the curve of the axial force of anchor cable in the first layer over time, as shown in Figure 4.…”

Section: Stress Of Anchor Cablementioning

confidence: 99%

Displacement Monitoring during the Excavation and Support of Deep Foundation Pit in Complex Environment

Li¹

2021

Advances in Civil Engineering

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Taking a super large deep foundation pit project as an example, the horizontal displacement of crown beam and driveway, surface settlement, axial force of anchor cable, and underground water level in the construction process of the foundation pit are dynamically monitored and analyzed. The excavation deformation rule of the deep foundation pit and the influence of excavation on surrounding buildings are analyzed. The results show that, with the excavation of the foundation pit, the crown beam and driveway of the foundation pit incline towards the direction of the pit and eventually tend to be stable. The variation of axial force of the prestressed anchor cable in the first layer of the foundation pit is basically consistent with the variation of horizontal displacement time history. The variation trend of the groundwater level at each side of the foundation pit is different but tends to be stable in a short time. In the whole monitoring period, the cumulative settlement value of each area of the foundation pit is within the controllable range, but the surface settlement of the north side of the foundation pit and a surrounding building has not reached stability, so it is suggested to extend the monitoring time of settlement in the relevant area.

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Section: Stress Of Anchor Cablementioning

confidence: 99%

Displacement Monitoring during the Excavation and Support of Deep Foundation Pit in Complex Environment

Li¹

2021

Advances in Civil Engineering

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“…In this paper, the direct integration method of linear time history analysis is used, and the natural frequency calculated by the aforementioned eigenvalues is substituted into equations ( 6) and (7) to calculate the corresponding mass and stiffness factors. For the traffic load on the slope top, when the car wheel passes through a certain point on the road surface at a certain speed, the change of the wheel load at that point is a process of first increasing and then decreasing, and its stress curve is a half-wave sine curve.…”

Section: Time-domain Analysis Of Traffic Load Slopementioning

confidence: 99%

“…Rainieri et al [3] studied the response characteristics of embedded retaining wall under dynamic load and obtained a sensitivity coefficient of relevant model parameters to wall stability, which improved the existing design index of embedded retaining wall. Koca et al and Nakajima et al [7,8] used the principle of three-dimensional polar stereographic projection to analyze the dynamics of the bolt, thus obtaining the optimal anchoring angle of the bolt. Compared with the traditional method, the reliability of the conclusion is verified.…”

Section: Introductionmentioning

confidence: 99%

The Anti sliding Mechanism of Adjacent Pile‐Anchor Structure considering Traffic Load on Slope Top

Zhang

2021

Advances in Civil Engineering

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In view of the fact that the anti sliding effect analysis of the current anchor cable and anti slide pile structure is not yet complete, research on the synergy mechanism of adjacent pile-anchor composite structures under traffic load is carried out. Firstly, a free vibration analysis for the slope dynamic model is carried out by using a three-dimensional finite element numerical simulation method. By improving the slope boundary conditions of time-domain analysis, the time-domain equation of the dynamic model of traffic load acting on the top of the slope is solved accurately, and the response law of the internal force of the pile anchor composite structure is also described. The mechanism by which the pile anchor composite structure resists against the slope sliding through the internal force increment is proposed: this internal force increment is estimated to be 73.4%, while that of anchor cable is 26.6%. The composite structure presents the coordinated sharing for sliding force. The internal force of the lower row of anchor cables is 89.48 kN larger than that of the upper row, and the internal force increment is four times larger, indicating that the lower anchor cable is more effective in slope reinforcement. As the deformation at the top of the slope is greater, the prestress of the upper anchor cable should be increased to avoid the “chain failure” caused by excessive deformation. As a result, the coordination law of internal force of pile anchor is revealed, and the anti sliding sharing mechanism is clarified. A design idea of the adjacent pile-anchor composite structure is proposed, which takes 0.2‐0.3 times the remaining sliding force as the design value of prestressed anchor cable. The idea fully considers the anti sliding effect of prestressed anchor cables and reduces the design size of anti slide pile section, providing a theoretical support for optimization design of combined anti slide structure and saving project investment.

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“…Zhang et al (2010) discussed the effect of reinforcement of a rock slope with group anchorage cables and the stress characteristics of pre-stressed anchorage cables in the fractured surface. Koca et al (2011) examined anchor applications using the example of a Karatepe andesite rock slope. A dynamic simplified model for anchor rod frame ground beam to support slopes based on the elastic ground beam theory and structural dynamics theory was proposed by Yuan and Liu (2012).…”

Section: Introductionmentioning

confidence: 99%

Layout and length optimization of anchor cables for reinforcing rock wedges

Wang

et al. 2015

Bull Eng Geol Environ

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This paper presents an optimization study on the layout and length of anchor cables for stabilizing rock wedges from the perspective of their three-dimensional geological characteristics. On the basis of the generalized geometry model for rock wedges, the expression of driving force of slope at the arbitrary longitudinal section can be deduced by employing the hyperbolic model between driving force and scale factor of rock wedges. Due to the remarkable parabolic characteristics of the driving force expression of rock wedges, a corresponding non-uniform layout principle of anchor cables was proposed, with closer layout in the central part and sparse layout near the side boundaries. The rational length of anchor cables was quantified on the basis of specification and the three-dimensional spatial characteristics of rock wedges. Furthermore, the upper limit spacing of anchor cables was determined by the spacing threshold caused by the parabolic distributed driving force. The spacing distribution of the optimized anchor cables was verified as a parabolic distribution according to a case study on the Shuige rock wedge in Lishui City, China. Compared with the conventional uniform spacing and length design scheme, the adjusted optimal non-uniform scheme can reduce the anchor cables by 16.9 % and 18.9 % in number and in total length, respectively.

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Anchor application in Karatepe andesite rock slope, Izmir—Türkiye

Cited by 22 publications

References 13 publications

Displacement Monitoring during the Excavation and Support of Deep Foundation Pit in Complex Environment

Displacement Monitoring during the Excavation and Support of Deep Foundation Pit in Complex Environment

The Anti sliding Mechanism of Adjacent Pile‐Anchor Structure considering Traffic Load on Slope Top

Layout and length optimization of anchor cables for reinforcing rock wedges

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