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Volume 10 Issue 01 (January 2023)

S.No. Title & Authors Page No View
1

Title : Study On Recycled Aggregate Permeable Concrete in Urban Slow Moving System

Authors : Zhang Huixin, Xu Lizhong, Wang Zhi

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Abstract :

In this paper, a new type of anti-blocking permeable concrete pavement structure is proposed. the upper layer of the structure adopts hard, dense and strong permeable concrete, the lower layer adopts recycled aggregate permeable concrete, and the permeable geotextile is laid on the recycled graded sand. The application of construction waste recycled aggregate to road engineering alleviates the current situation of construction waste accumulation and reduces the pollution problems caused by construction waste accumulation to soil and water source. at the same time, it reduces the adverse impact on the surrounding environment in the process of construction waste disposal, avoids the environmental pollution caused by dust, dust and sand in the process of transportation and storage, and saves a lot of land resources. It is one of the ways of recycling construction waste. Construction waste recycled aggregate instead of natural aggregate can reduce the purchase of new stone, save a lot of ore resources, reduce the negative impact on the natural environment caused by mountain quarrying and river sand mining, protect resources, and achieve remarkable social benefits.

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2

Title : Study on Deformation Characteristics of Soft Soil Deep Foundation Pit under Overload Condition

Authors : Liu Feng, Li Hongwei, Li Hongtao, Ye Caifa

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Abstract :

Adjacent overload has a significant effect on the deformation of deep foundation pits in soft soil areas. At the same time, the construction of foundation pits in soft soil areas has obvious time effects, while the classical elastic and elastoplastic models can not reflect this. By establishing a finite element model considering the creep-consolidation coupling effect of soil, the deformation characteristics of deep foundation pit caused by different overload sizes are analyzed and verified by comparison with measured data. The results show that the overloading will reduce the negative excess pore water pressure generated in the surrounding soil due to excavation and unloading. The soil outside the pit is mainly rheological, and the consolidation effect of the soil is almost negligible, while the soil in the pit shows the coupling effect of rheology and consolidation. The effect of overloading on the horizontal displacement of the underground continuous wall is significant. The larger the overload value, the larger the horizontal displacement of the underground continuous wall.The near-overload of the foundation pit increases the maximum settlement of the ground surface behind the wall. The overload action causes the maximum surface settlement of the wall behind the wall to be closer to the retaining wall.

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