Influence of physical properties on the initial structure of loess

WANG Li-qin; SHAO Sheng-jun; LU Zhong-gang

doi:10.16285/j.rsm.2017.12.012

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Influence of physical properties on the initial structure of loess

更新时间：2026-06-25

- Influence of physical properties on the initial structure of loess
- Vol. 38, Issue 12, Pages: 3484-3490(2017)
- 作者机构：
  
  1. 西安理工大学岩土工程研究所,陕西,西安,710048
  2. 西安理工大学陕西省黄土力学与工程重点实验室,陕西,西安,710048
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.12.012
  CLC： TU43
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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WANG Li-qin, SHAO Sheng-jun, LU Zhong-gang. Influence of physical properties on the initial structure of loess[J]. 2017, 38(12): 3484-3490.
DOI：

WANG Li-qin, SHAO Sheng-jun, LU Zhong-gang. Influence of physical properties on the initial structure of loess[J]. 2017, 38(12): 3484-3490. DOI： 10.16285/j.rsm.2017.12.012.

摘要

黄土是具有特殊结构性的土，目前对其结构性影响因素的研究大多处于单因素定性分析阶段。构度指标反映的是黄土的初始结构性。为研究物理指标对初始结构性的综合影响，首先，对西安、兰州两地原状及重塑的黄土试样开展了不同含水率下的无侧限抗压强度试验，得到了相应黄土的构度。分析得出：构度随含水率、干密度、最小密度比、塑性指数、液性指数的增大均呈减小的趋势，除此之外，还与黄土的形成时代及其分布地区有关。其次，根据以上结论，用基本物理指标构造了一个综合物理量，进一步分析了构度与综合物理指标的关系，得出了区分地区、区分地质时代的由综合物理量直接定量计算构度指标的经验公式。最后，通过对西安另一场地的黄土进行试验得出的构度指标与运用本经验公式计算所得的构度值的对比，初步验证了其合理性、适用性。经验公式为以后通过简单易测的物理指标定量计算构度提供了一种方法。

Abstract

Loess is a soil with a special structure. Currently the studies of influence factors on loess structure are mostly qualitative analysis using single factor. Structural index reflects the initial structure of loess. To study the influence of the physical parameters on the initial structure

firstly

unconfined compressive strength tests are conducted on the undisturbed and remolded loess samples with different water content taken from Xi’an and Lanzhou. Next

the corresponding structural indexes of loess are obtained. The analysis shows that the value of structural index decreases with the increasing of water content

dry density

minimum density ratio

plasticity index and liquidity index. In addition

it is also related with the geological period and geographical distribution of loess. Secondly

according to the above conclusions

a comprehensive physical index is constructed by the fundamental physical indexes. The relationship between the structure and the comprehensive physical index is further analyzed. The empirical formulas are obtained which can directly calculate structure index quantitatively by the comprehensive physical index considering the distinction between the geographical zonation and geological periods. Finally

by the comparisons of the structure indexes obtained by test for another loess field in Xi’an and the structure indexes calculated by the empirical formulas herein

their rationality and applicability are verified. These formulas provide a simple and easy method for quantitative calculation of the structural index by physical indexes to measure in the future.

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