钢板、高聚物、土不同材料界面剪切特性试验研究

林沛元; 郭潘峰; 郭成超; 陈立朝; 王复明

doi:10.11779/CJGE20210845

钢板、高聚物、土不同材料界面剪切特性试验研究 English Version

林沛元^{1, 3, 4,},
郭潘峰²,
郭成超^{1, 3, 4, 5, ,},
陈立朝^{1, 3, 4},
王复明^{1, 3, 4, 5}

1.
中山大学土木工程学院, 广东广州 510275
2.
广州市城市规划勘测设计研究院, 广东广州 510060
3.
广东省地下空间开发工程技术研究中心, 广东广州 510275
4.
南方海洋科学与工程广东省实验室(珠海), 广东珠海 519080
5.
南方工程检测修复技术研究院, 广东惠州 516000

基金项目:

广东省引进创新创业团队项目 2016ZT06N340

河南省重大科技专项项目 181100310400

中国国家铁路集团有限公司科技研究开发计划课题 K2019G032

国家自然科学基金项目 52008408

详细信息

作者简介:
林沛元(1986—)，男，教授，博士生导师，主要从事重大基础设施灾变风险管控方面的研究工作。E-mail: linpy23@mail.sysu.edu.cn

通讯作者:
郭成超, E-mail: guochch25@mail.sysu.edu

中图分类号: TU432
计量
- 文章访问数: 255
- HTML全文浏览量: 46
- PDF下载量: 93
出版历程
- 收稿日期: 2021-07-26
- 网络出版日期: 2023-02-03
- 发布日期: 2021-07-26
- 刊出日期: 2022-12-31

Experimental study on interfacial shear properties of steel plate, polymer and soil

LIN Peiyuan^{1, 3, 4,},
GUO Panfeng²,
GUO Chengchao^{1, 3, 4, 5, ,},
CHEN Lichao^{1, 3, 4},
WANG Fuming^{1, 3, 4, 5}

1.
School of Civil Engineering, Sun Yat-Sen University, Guangzhou 510275, China
2.
Guangzhou Urban Planning Survey and Design Institute, Guangzhou 510060, China
3.
Guangdong Research Center for Underground Space Exploitation Technology, Guangzhou 510275, China
4.
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 510275, China
5.
Southern Institute of Infrastructure Testing and Rehabilitation Technology, Huizhou 516000, China

摘要

摘要: 为了研究高聚物与不同介质界面的剪切特性，基于直剪试验，研究了土体含水率、法向应力、界面类型、高聚物密度和成型方式等因素对界面剪切强度的影响。研究结果表明：钢板-高聚物界面破坏形式与其它界面存在差异，呈现脆性破坏。不同界面的剪切强度与高聚物密度、法向应力和土体含水率存在关系。界面的剪应力值随高聚物密度和法向应力的增大而逐渐增大，随含水率的增大而减小。当法向应力和土体含水率一定时，非预成型高聚物-土体界面剪切强度大于预成型高聚物-土体界面，但随着含水率的增大，高聚物成型方式对高聚物-土体界面剪切强度的影响逐渐减小。当其它条件一致时，钢板-高聚物界面、高聚物-土体界面、土体自身和钢板-土体界面的剪切强度依次减小，使用高聚物后，界面抗剪强度分别提高了73%，108%，125%和115%，钢板-高聚物-土体界面的抗剪强度明显优于单纯钢板-土体界面。
- 接触面 /
- 直剪试验 /
- 高聚物 /
- 剪切特性 /
- 抗剪强度
Abstract: The shear properties of interfaces between polymer and different media are investigated based on the direct shear tests. The effects of moisture content of soil, normal stress, interface types, polymer density and molding method on the interfacial shear strength are all examined. The results show that the steel plate-polymer interface exhibits brittle failure mode, which is different from that of other interfaces. The shear strength of different interfaces depends upon the polymer density, normal stress and moisture content of soil. The interfacial shear stress increases with the increase of the polymer density and normal stress, but decreases as the moisture content increases. Given the normal stress and moisture content, the shear strength of the non-preformed polymer-soil interface is greater than that of the preformed polymer-soil interface. Nevertheless, with the increase of the moisture content, the influences of polymer-forming methods on the shear strength of the polymer-soil interfaces are gradually weakened. Given other conditions the same, the shear strengths of the steel plate-polymer interface, polymer-soil interface, soil itself, and steel plate-soil interface decrease in order. After using the polymer, the interfacial shear strength is increased by 73%, 108%, 125% and 115%, respectively. The steel plate-polymer-soil interface mechanically outperforms the steel plate-soil interface in terms of the shear strength.
- interface /
- direct shear test /
- polymer /
- shear property /
- shear strength

HTML全文

图 1 界面剪切试验样品示意图

Figure 1. Schematic diagram of interface shear test sample

下载: 全尺寸图片幻灯片

图 2 不同法向应力下各界面剪应力-剪切位移曲线

Figure 2. Shear stress-displacement curves of interfaces under different normal stresses

下载: 全尺寸图片幻灯片

图 3 不同密度下各界面剪应力-剪切位移曲线

Figure 3. Shear stress-displacement curves of interfaces under different densities

下载: 全尺寸图片幻灯片

图 4 不同土体含水率下各界面剪应力-剪切位移曲线

Figure 4. Shear stress-displacement curves of interfaces under different moisture contents of soil

下载: 全尺寸图片幻灯片

图 5 剪切破坏后高聚物界面图

Figure 5. Polymer interfaces after shear failure

下载: 全尺寸图片幻灯片

图 6 不同界面抗剪强度参数与含水率关系曲线

Figure 6. Curves of shear strength parameters and moisture content of different interfaces

下载: 全尺寸图片幻灯片

图 7 成型方式对高聚物-不同含水率土体接触面的影响

Figure 7. Effects of molding method on interface between polymer and soil with different moisture contents

下载: 全尺寸图片幻灯片

图 8 不同界面的剪应力-剪切位移关系曲线对比

Figure 8. Comparison of shear stress-displacement curves of different interfaces

下载: 全尺寸图片幻灯片

表 1 不同界面抗剪强度指标值

Table 1 Values of shear strength indexes of different interfaces

界面类型	含水率/%	$\varphi$ /(°)	$c/{\text{kPa}}$	R²
钢板-高聚物	—	46.7	280.7	1.00
非预成型高聚物-土体	16	50.1	16.3	0.99
预成型高聚物-土体	12	26.8	35.7	0.99
	16	24.9	27.3	0.98
	20	30.8	1.3	1.00
	24	30.3	6.0	1.00
钢板-土体	12	24.0	5.0	0.98
	16	19.8	4.0	1.00
	20	23.0	0.3	1.00
	24	22.3	2.3	0.97
土体	12	31.0	24.3	1.00
	16	32.2	16.7	1.00
	20	31.4	16.3	1.00
	24	31.6	10.3	1.00

下载: 导出CSV

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