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Study of Simulated Experiment on Hydrothermal Change in the Artificially Wall of Earthen Architecture Sites

Author: ZhengLong
Tutor: ZhouZhongHua
School: Lanzhou University
Course: Geological Engineering
Keywords: Thermal degradation Temperature Monitoring Moisture monitoring Changes in the hydrothermal Inversion
CLC: K854
Type: Master's thesis
Year: 2009
Downloads: 82
Quote: 2
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Soil sites deterioration research occupies an important position in the protection of cultural relics , and the temperature and moisture content are two important factors affecting the deterioration recognize the deterioration mechanism of soil sites for the protection and reinforcement of the earthen sites plays a very important role . Jiaohe , Xinjiang soil sites wall , the first artificial rammed earth walls implanted silicon semiconductor sensor for temperature monitoring , and the results show that near the the West surface and surface temperature changes at the South within the wall than the other wall internal measured the more dramatic change in temperature of the point , and from the wall surface to the wall center , a significant temperature gradient can be drawn from the expansion and contraction deformation of the environmental temperature changes caused by the soil particles and there are differences ; same time, using time domain reflectometry method (Time Domain Reflectometry, referred to as the TDR) monitoring of the water content of artificial rammed earth walls , results showed that the lowest wall the internal close to West the surface of the water content value and the most dramatic changes , West surface of the wall the soil moisture migration is the most active . Subsurface water content to follow the darker depths moisture content greater with the depth of the wall under the south side of the surface low water content ; solar radiation in a large area to promote moisture evaporation . Silty clay soil sites water content and resistivity relationship resistivity model experiments based on the use of laboratory experiments in artificial rain test the site soil sites wall , the use of high-density resistivity method for continuous monitoring of soil sites the wall of the inversion of the water content , water content over time gradually to the surface of deep penetration trends . For monitoring the temperature and moisture content of the different seasons , found roughly the same trend of changes in temperature and moisture content , just the peak moment of a slight change , and closely related to solar activity , the maximum and minimum values ??of the temperature or water content change August higher November low , and the respective maximum and minimum of the differential is also different , the larger the difference in August . Comprehensive analysis of changes in the temperature and moisture content of the relationship into a Boltzmann form, the empirical formula of the temperature and moisture content for the Boltzmann equation , R ~ 2 are about 0.9 .

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