Improved double strength reduction method of slope stability evaluation

A dual-intensity, subtraction technique, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as confusion and unclear exact value methods.

Inactive Publication Date: 2013-09-18
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the development of research, it was proposed the double strength reduction method, which considers two shear strength parameters (internal friction angle Different from the primary and secondary contribution of cohesion c) in slope stability, it is more in line with physical reality, but the ratio k=SRF 2 / SRF 1 The determination of has always been a very confusing issue, and the exact value method of the double reduction coefficient ratio k is still unclear

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  • Improved double strength reduction method of slope stability evaluation
  • Improved double strength reduction method of slope stability evaluation
  • Improved double strength reduction method of slope stability evaluation

Examples

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Embodiment 1

[0058] Case 1: A certain slope is located in Guizhou Province, which belongs to the high rock slope of the expressway from Zunyi City to Bijie City. The terrain of this section of the expressway is towering and belongs to the mountainous area. The geological lithology is dominated by carbonate rocks with a relatively uniform texture. The slope is 196 meters high and the overall slope is 57°. The slope section diagram can be found in figure 1 :

[0059] Although there are piled foundations on the slope, the piled foundations will affect the location of potential sliding surfaces. However, in the calculation example, the depth of the pile foundation has little influence on the slope, so it is ignored in the calculation for the convenience of calculation. Because the rock mass of the high carbonate rock slope is relatively uniform in texture, a single material is used, and its physical and mechanical parameters are shown in Table 1.

[0060] Table 1 The mechanical parameters ...

Embodiment 2

[0063] An example is the high slope of a ship lock in the upper reaches of the Yangtze River. The ship lock has an annual one-way passing capacity of 50 million tons, and its maximum operating head is 113m. It is a double-line five-level ship lock. The distance between the center lines of the left and right line ship locks is 94m, and a 60m-wide pier is reserved in the middle. The main structure is 1617 meters long. The earth and rock excavation volume during the process was 42.11 million cubic meters, forming a high slope of 70-120 meters high and a maximum of 170 meters; The integrity of the structure is relatively poor, and it is the most likely dangerous part of the entire navigable structure. The present invention selects the section 17-17 of the gate head area as the calculation section, and the section diagram is shown in figure 2 : Refer to Table 2 for mechanical parameters of slope rock mass in Case 2:

[0064] Table 2 Case 2 rock mass mechanical parameters table ...

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Abstract

The invention discloses an improved double strength reduction method of slope stability evaluation. The method has the following steps: analyzing the mapping relationship between the double reduction factor rate and the safety factor, combining the calculation of the examples, fitting the mapping relational expression, giving the concept of minimum safety factor, and finally providing the improved double strength reduction method and general steps for analyzing the slope stability through the method to provide new analytic method to the slope stability evaluation.

Description

technical field [0001] The invention belongs to the field of slope stability evaluation and specifically designs an improved double-strength reduction method for slope stability evaluation. Background technique [0002] Slope safety is closely related to the safety of life and property in the project, and is an important guarantee for the safe operation of the project. There are many methods for slope stability evaluation, and the strength reduction method can not only calculate the safety factor, but also obtain the position and shape of the potential sliding surface of the slope, so it has been favored since it was proposed. With the development of research, it was proposed the double strength reduction method, which considers two shear strength parameters (internal friction angle Different from the primary and secondary contribution of cohesion c) in slope stability, it is more in line with physical reality, but the ratio k=SRF 2 / SRF 1 The determination of has always...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 梁桂兰王新徐卫亚王伟
Owner HOHAI UNIV
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