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High and steep slope earthquake instability early warning method for under interaction of pier stud-pile-soil foundation and application of high and steep slope earthquake instability early warning method

A technology for high and steep slopes and piers, which is applied in the field of early warning of earthquake instability on high and steep slopes, can solve the problems of seismic response without considering complex geological conditions, inability to measure soil deformation values, and limited applicability of models, etc., to achieve The effect of long service life, low cost and convenient operation

Active Publication Date: 2022-01-04
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, "A High and Steep Slope Monitoring System and Monitoring Method Based on Radar and Infrared Rays" (Application Publication No.: CN 108548497 A) uses radar and infrared rays to monitor the slope displacement generated in the high and steep slope area to judge the stability of the slope , the early warning must be issued after the displacement occurs, and the prediction accuracy is not high, and the deformation value of each point inside the soil cannot be measured
Another example is the "Stability Research System of High and Steep Slopes Under Earthquake and Rainfall Actions" (Application Publication No.: CN113092046A), which evaluates the stability of high and steep slopes under the coupled effects of earthquake and rainfall through a scaled-down slope model shaking table test. However, the seismic response of complex geological conditions under the interaction of pier-pile-soil foundation is not considered, the applicability of the model is limited, and there is still a certain distance to apply it to site evaluation and instability warning

Method used

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  • High and steep slope earthquake instability early warning method for under interaction of pier stud-pile-soil foundation and application of high and steep slope earthquake instability early warning method
  • High and steep slope earthquake instability early warning method for under interaction of pier stud-pile-soil foundation and application of high and steep slope earthquake instability early warning method
  • High and steep slope earthquake instability early warning method for under interaction of pier stud-pile-soil foundation and application of high and steep slope earthquake instability early warning method

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Experimental program
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Effect test

Embodiment 1

[0060] An early warning method for earthquake instability of high and steep slopes under the interaction of pier-pile-soil, such as figure 1 shown, including the following steps:

[0061] Step 1: Geological prospecting or investigation of geological reports to determine the soil parameters of different soil layers.

[0062] Step 1.1: Mainly determine the cohesion, internal friction angle and soil weight of different soil layers;

[0063] Step 1.2: Calculate the shear strength of the soil at different positions on the monitoring pole, compare the earth pressure measured by the earth pressure box, and use it in step 7.1 to determine the stability of the high and steep slope after the earthquake;

[0064] Firstly, conduct geological exploration or investigate geological exploration reports, analyze the soil depth of different soil types, and obtain the cohesion and internal friction angle shear strength indicators of different soil types. In a preferred embodiment of the presen...

Embodiment 2

[0112] Such as image 3 and Figure 4 As shown, a device applying the method for early warning of earthquake instability of high and steep slopes under the interaction of pier column-pile-soil foundation includes a monitoring rod, and the monitoring rod includes a rectangular steel pipe 3 and is arranged on the top of the rectangular steel pipe 3 The top hat 1, the monitoring rod is provided with a number of detection elements, the monitoring rod is provided with a data transmission unit 2, the data transmission unit through the opening of the GPRS function of the SIM card, the detection element detects the horizontal acceleration, pile The soil pressure between the soil and the strain value between the monitoring poles are sent to the remote data processing terminal in real time.

[0113] Preferably, the detection elements include: an earth pressure cell 4, a horizontal accelerometer 5 and a strain gauge 6, and each potential sliding surface 11 is symmetrically arranged with...

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Abstract

The invention discloses a high and steep slope earthquake instability early warning method under the interaction of a pier stud-pile-soil foundation and application of the high and steep slope earthquake instability early warning method. The high and steep slope earthquake instability early warning method comprises the steps that monitoring rods are arranged between a pier pile foundation and an anti-slide pile of a high and steep slope, from the position above the anti-slide pile to a slope top, from the position below the anti-slide pile to a slope toe and the like; earthquake horizontal acceleration and soil pressure of a soil body and a bending moment value of the monitoring rods are measured through horizontal accelerometers, soil pressure boxes and strain gauges on the monitoring rods; and then data are transmitted to a remote server through a data transmission unit, the stability condition of the high and steep slope is monitored in real time, and early warning is provided for management personnel through an earthquake occurrence alarm unit and a post-earthquake alarm unit. According to the invention, real-time post-earthquake monitoring is carried out on the complex geological condition under the interaction of the pier stud-pile-soil foundation of the high and steep slope, the cost is low, the service life is long, the operation is convenient, and the earthquake stability of the complex underground space of the high and steep slope can be effectively evaluated.

Description

technical field [0001] The invention relates to the field of early warning of earthquake instability of slope engineering, in particular to an early warning method of earthquake instability of high and steep slope under the interaction of pier column-pile-soil foundation and its application. Background technique [0002] In the past ten years, my country's high-speed railway has developed rapidly, and its network planning density has been continuously advancing to the west. It inevitably crosses complex terrain such as high and steep slopes in river valleys and geological fault zones. The post-earthquake stability assessment of the foundation structure is carried out. [0003] The existing stability analysis of high and steep slopes mainly focuses on the superstructure of bridges, and the analysis of the instability and damage of the pier column-pile-soil structure coupling system is relatively rare, let alone considering the near-field strong earthquake action on the valley ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00E02D17/20E02D27/42E02D27/14G08B21/10G08B31/00
CPCE02D33/00E02D17/20E02D17/207E02D27/42E02D27/14G08B21/10G08B31/00
Inventor 姬建张文梁蔡易成王涛谢小磊崔红志廖文旺宋健
Owner HOHAI UNIV
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