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Roadbed gravel soil dynamic resilience modulus estimation method

A dynamic rebound modulus and gravel soil technology, which is applied in soil material testing, measuring devices, specific gravity measurement, etc., can solve problems such as the inability to accurately predict the dynamic rebound modulus value of subgrade gravel soil, and achieve high engineering Application value, wide application range, and effect of improving prediction accuracy

Active Publication Date: 2020-07-31
CHONGQING JIAOTONG UNIVERSITY +1
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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a method for estimating the dynamic modulus of resilience of subgrade gravel soil to solve the problem that the dynamic modulus of resilience of subgrade gravel soil cannot be accurately estimated at present

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  • Roadbed gravel soil dynamic resilience modulus estimation method
  • Roadbed gravel soil dynamic resilience modulus estimation method
  • Roadbed gravel soil dynamic resilience modulus estimation method

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Embodiment Construction

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] The embodiment of the present invention provides a method for estimating the dynamic modulus of resilience of subgrade gravel soil, which is specifically carried out according to the following steps:

[0042] Step S1. Carry out compaction tests on subgrade gravel soil samples with 0%-70% stone content, and obtain the optimum moisture content and maximum dry density under different stone contents, and provide basic indicators for subsequent calculation of compaction degree . Specifically: Put the soil samples required for com...

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Abstract

The invention discloses a roadbed gravel soil dynamic resilience modulus estimation method which comprises the following steps: respectively configuring roadbed gravel soil with different stone contents, carrying out a compaction test on the roadbed gravel soil, and determining the optimal water content and the maximum dry density of the roadbed gravel soil with different stone contents; preparingtriaxial roadbed gravel soil samples with different compaction degrees by adopting the configured roadbed gravel soil with different stone contents, and carrying out dynamic triaxial test on the triaxial roadbed gravel soil samples to obtain dynamic resilience modulus values of the roadbed gravel soil samples under different working conditions; comparing and analyzing the dynamic resilience modulus values of the roadbed gravel soil sample under different working conditions, and establishing a roadbed gravel soil dynamic resilience modulus estimation model; fitting the roadbed gravelly soil dynamic resilience modulus estimation model to obtain model parameters, and finally estimating the roadbed gravelly soil dynamic resilience modulus under different working conditions by adopting the roadbed gravelly soil dynamic resilience modulus estimation model with the known model parameters. The problem that the dynamic resilience modulus of the roadbed gravel soil cannot be accurately estimated is solved.

Description

technical field [0001] The invention belongs to the technical field of road construction, and relates to a method for predicting the dynamic resilience modulus of subgrade gravel soil. Background technique [0002] my country has a vast territory and mountains are widely distributed. There are a large number of mountain road construction projects in the western and southern regions of my country. At the same time, the embankment height of mountainous roads is generally high, and the average earthwork consumption per kilometer of two-way four-lane expressways reaches 45,000m 3 . In the construction of extensive mountainous road projects, there is often a lack of suitable roadbed fillers, while rocks and gravel are widely distributed in the natural environment. Therefore, in engineering projects in the western and southern mountainous areas of our country, designers and engineers often choose crushed stone materials to add to the roadbed soil to form roadbed crushed stone so...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N3/32G01N9/02G01N33/24G06F30/20
CPCG01N1/28G01N3/32G01N9/02G01N33/24G01N2203/0005G01N2203/0083G01N2009/024
Inventor 姚永胜钱俊峰罗深平肖宏彬
Owner CHONGQING JIAOTONG UNIVERSITY
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