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Research on Foundation of Disposal Technique of Positive Buried Culvert Widening

Author: ChengChao
Tutor: FengZhongJu
School: Chang'an University
Course: Geotechnical Engineering
Keywords: Road works Culvert widening Ground treatment Numerical Analysis Theoretical calculations
CLC: TU473.1
Type: Master's thesis
Year: 2010
Downloads: 48
Quote: 0
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Abstract


In order to meet the growing demand for traffic , every year, a large number of new highway into use , but with the national road network is getting more sophisticated , the new highway is gradually reduced , in order to ensure the normal operation of the highway , both to improve its capacity to overcome construction funds the problem , the old road widening gradually increased , which has become a hot issue together old and new culverts after the widening of the old culvert . Especially high fill culvert foundation treatment methods , appropriate treatment can one meet its functional requirements , but the culvert design theory before this did not have a larger development , especially in the design manuals and specifications for culvert earth pressure , resulting in the calculated results and the actual results , these designs lack the culvert diseases continue to produce a serious impact on the capacity and service life of the highway . In this paper, Zheng Luo Expressway expansion project, to study the interaction between the old and the new in the old road widening culverts . Theoretical calculations on the excavation of culverts to increase the the culverts clearance construction method , and the results showed that : this method , its carrying capacity , against overturning and skid checking meet the design requirements ; calculated by numerical analysis of the different ground treatment methods the impact of the old and new culverts and different filling height filling under new culverts under different ground treatment methods subsidence problems , the results show that : the use of prestressed pipe pile treatment can control the old and the new culvert differential subsidence , but after just the prestressed pipe pile treatment but resulting in a widening culverts top of the additional stress of the rapid increase in the new Han Han , culvert structure uneven force Lee ; combination of theoretical analysis , the results of numerical analysis and engineering practice, proposed the foundation and filling Treatment Measures . Research break through the limitations of existing theoretical approaches or engineering measures to enrich and deepen the culvert design and construction methods and engineering measures on the one hand , on the other hand provides scientific technical reference for the widening project in the design and construction of culverts , has important practical significance .

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > Pile foundation and deep foundation > Pile
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