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A method for determining the bearing capacity of cohesive soil foundation based on shear wave velocity

A shear wave velocity, soil foundation technology, applied in the field of foundation soil survey, infrastructure engineering, construction, etc., can solve the problems of long test cycle, time-consuming and labor-intensive, limited measurement depth, etc., to overcome terrain constraints and construction period constraints , Strong applicability and quantification, the effect of reducing physical workload

Active Publication Date: 2021-11-23
CHINA RAILWAY DESIGN GRP CO LTD +1
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  • Application Information

AI Technical Summary

Problems solved by technology

Among them, in-situ testing has a limited depth, which is time-consuming and labor-intensive; the theoretical formula method and the standard table method also rely on the samples obtained from drilling and in-situ test results. Difficulties Encountered in Railway Engineering Exploration
Moreover, these methods are often point-to-area, unable to obtain continuous geological results, fail to meet the needs of design accuracy and adjustment, and cannot determine the bearing capacity of the foundation at the specified location without drilling

Method used

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  • A method for determining the bearing capacity of cohesive soil foundation based on shear wave velocity
  • A method for determining the bearing capacity of cohesive soil foundation based on shear wave velocity
  • A method for determining the bearing capacity of cohesive soil foundation based on shear wave velocity

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Count the shear wave and cohesive soil standard penetration hits of drill holes that have been explored in Northeast China, and collect the corresponding shear wave data in this area. There are 18 drill holes and 53 layers of cohesive soil sample points in this statistics. 8 outliers need to be removed.

[0042] The collected data used normal distribution, and the data outside 99.7% of the probability density function had to be removed.

[0043] Use the shear wave seismograph to collect shear wave data with a point distance of 5m, perform filtering and deconvolution, and finally obtain the shear wave velocity profile in this area through inversion, use sufer software to grid according to the Kriging difference method, and the grid spacing For 5m*5m, use MapGen software to extract the shear wave velocity of bridges, roadbeds and other projects. The interval of shear wave velocity is 5m, and analyze according to the statistical results in Table 1. The mileage of bridges,...

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Abstract

This application provides a method for determining the bearing capacity of cohesive soil foundations based on shear wave velocity, which includes the following steps: obtaining the shear wave velocity of the site; The formula calculates the standard penetration number of cohesive soil; according to the standard penetration number and void ratio, the foundation bearing capacity is determined by using the standard look-up table. The effect of the invention is to establish the direct connection between two mature technologies of shear wave velocity and standard penetration, and then constrain the measured data and the specification, and determine the foundation bearing capacity of the cohesive soil by looking up a table according to the specification. Compared with conventional survey methods, it can greatly reduce the influence of factors such as temperature, forest area, traffic and terrain on the progress of geological survey, reduce the workload of in-situ testing physical objects, greatly improve the efficiency of geological survey, shorten the survey cycle by more than 60%, and provide more It provides a new technical means to determine the bearing capacity of cohesive soil foundation more quickly.

Description

technical field [0001] The invention relates to the technical field of determining the bearing capacity of high-speed railway cohesive soil foundations, in particular to a method for determining the bearing capacity of cohesive soil foundations based on shear wave velocity. Background technique [0002] Railway construction is changing from quantity-scale type to quality-benefit type, and the construction area is gradually expanding to difficult and complex mountainous areas, forest areas, high-steep terrain, high altitude and other areas. More and more new railways have to pass through complex terrain and geological conditions. At the same time, it is also facing increasing environmental protection and construction period requirements. It is increasingly difficult for conventional exploration methods to meet the high-precision and tight construction period survey requirements of high-speed railways. Not only that, the terrain and geological conditions in mountainous areas a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D1/02
CPCE02D1/022
Inventor 马元王凯邓继伟高文峰刘成赵海张冠军王广帅聂虎啸岳亮张英杰葛玉辉赵罗明高帅尹传恒张文腾
Owner CHINA RAILWAY DESIGN GRP CO LTD
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