Study on the Improvement of Soil Water in Kaifeng Imitation Site

被引：0

作者：

Yue J. ^{[1
]}

Lin J. ^{[1
]}

Wang Y. ^{[1
]}

Liu T. ^{[2
]}

Zhang Y. ^{[1
]}

Wang S. ^{[1
]}

Wang W. ^{[1
]}

机构：

[1] School of Civil Eng. and Architecture, Henan Univ., Kaifeng

[2] Kaifeng City Wall Cultural Relics Protection Management Office, Kaifeng

来源：

Gongcheng Kexue Yu Jishu/Advanced Engineering Sciences | 2020年 / 52卷 / 01期

关键词：

Capillary water absorption; Imitation ruins; Improvement; Submerging test;

D O I：

10.15961/j.jsuese.201900370

中图分类号：

学科分类号：

摘要：

The flooding of the Yellow River results in lower water level and higher salt content in Kaifeng area. Under capillary effect, the bottom of Kaifeng city wall, which is mainly composed of soil, is in a state of wet and dry alternation. Under the action of salinity and frost heaving, the deterioration of city walls constantly occur. How to control the occurrence of capillarity is the key problem in the protection of historic buildings. In this paper, the imitation site soils of 4 types and 16 samples are tested, which contain 0, 1%, 3% and 5% mass ratio by the water repellent SHP-60. In order to explore the protection and repair methods of the wall soil,the capillary water absorption and water immersion disintegration test of the imitation site soil was improved by the water repellent SHP-60. By exploring the improvement effect of soil water properties of imitation sites under different SHP-60 content, and taking SEM picture by scanning electron microscopy and observing the microstructures of soil samples, it was found that the surface of SHP-60 adsorbed soil particles was birdnesting and connected, and the internal pore was reduced to form a waterproof film, which increased the water resistance of soil samples. The results showed that the SHP-60 coating around the pores of the soil particles can generate a large hydrophobic force and effectively enhance the hydrophobic properties of the soil particles. With the increase of SHP-60 content, the improvement effect of water properties is better. The imitation site soil with SHP-60 content of 5% can reduce the capillary water absorption quality by 92.34%. The immersion test found that a small amount of SHP-60 can effectively improve the disintegration performance of the imitation site soil. The 3%~5% of silicone water repellent can change the micro-structure of imitation site soil, reduce internal porosity and increase soil compactness. The formed waterproof film can improve the hydrophobic property of surface tension, and then effectively improve the water resistance of imitated site soil and prevent the erosion of site soil by underground capillary water. The research results provide a new idea for the restoration of soil sites. © 2020, Editorial Department of Advanced Engineering Sciences. All right reserved.

引用

页码：46 / 55

页数：9

共 25 条

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