Experimental study of compression characteristics of rockfill materials with composite grout

WANG Tao; LIU Si-hong; ZHENG Shou-ren; LU Yang

doi:10.16285/j.rsm.2017.2183

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Experimental study of compression characteristics of rockfill materials with composite grout

更新时间：2026-06-25

- Experimental study of compression characteristics of rockfill materials with composite grout
- Vol. 40, Issue 4, Pages: 1420-1426(2019)
- 作者机构：
  
  1. 河海大学水利水电学院
  2. 水利部长江水利委员会
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.2183
  CLC： TV641.4
- Published：2019
- 稿件说明：
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[1]王涛,刘斯宏,郑守仁,鲁洋.掺复合浆液堆石料压缩特性试验研究[J].岩土力学,2019,40(04):1420-1426.

WANG Tao, LIU Si-hong, ZHENG Shou-ren, et al. Experimental study of compression characteristics of rockfill materials with composite grout[J]. 2019, 40(4): 1420-1426.
[1]王涛,刘斯宏,郑守仁,鲁洋.掺复合浆液堆石料压缩特性试验研究[J].岩土力学,2019,40(04):1420-1426. DOI： 10.16285/j.rsm.2017.2183.

WANG Tao, LIU Si-hong, ZHENG Shou-ren, et al. Experimental study of compression characteristics of rockfill materials with composite grout[J]. 2019, 40(4): 1420-1426. DOI： 10.16285/j.rsm.2017.2183.

摘要

针对高堆石坝坝体变形大且持续时间长的问题

提出了一种提高堆石体压缩模量、减缓流变变形的方法

即利用易流动、后期硬化的高掺粉煤灰水泥砂浆（简称复合浆液）在堆石体摊铺过程中充填堆石体孔隙

在施工碾压的基础上进一步减小堆石体孔隙率。首先

通过观测复合浆液在透明玻璃球中的流动性态

研究不同配比与掺量对复合浆液流动特性的影响;然后

通过侧限压缩和流变试验

研究掺复合浆液堆石料的压缩模量、流变变形的变化规律。试验结果表明:复合浆液在颗粒体孔隙中的流动性能与粉煤灰掺比、水胶比、砂粒最大粒径以及掺量有关;复合浆液的掺入能有效提高堆石料压缩模量

减少流变变形

且对于软岩料、级配不良料效果更为明显;复合浆液在堆石料中主要起到了充填、胶结与润滑作用。

Abstract

Due to the large deformation and its long time dependent characteristic of high rockfill dams

a method of using composite grout to increase the compression modulus and reduce creep deformation of rockfill materials is proposed for high rockfill dams. The composite grout is a mixture of fly ash and cement with the characteristics of easy flow and post hardening. The composite grout was first sprinkled on the surface of rockfills

which later infiltrated into the rockfills during the process of rolling compaction. Flow tests on glass balls were conducted to study the effects of mixture ratios and contents of composite grout on its flow characteristics.Confined compression tests and creep tests were finally carried out to investigate the compression modulus and creep deformation of rockfills with composite grout. The results show that the flow property of composite grout is related to the fly ash content

water-to-binder ratio

maximum sand size and mixed content. The filling of composite grout can effectively increase the compression modulus and decrease creep deformation of rockfills

especially for soft rock materials and poorly-graded rockfills. The composite grout mainly plays the role of filling

cementation and lubrication in rockfills.

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