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Research on Load Diagram of Gravity Retaining Structures

Author: LiuShaoFei
Tutor: LiuChangQing
School: Southwest Jiaotong University
Course: Road and Railway Engineering
Keywords: Gravity retaining structures Load Schema Centrifuge model test Numerical Analysis Dynamic load
CLC: U213.152.2
Type: Master's thesis
Year: 2010
Downloads: 41
Quote: 1
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Abstract


Gravity retaining wall structure is a weight to balance rely on soil mass resulting earth pressure retaining structure . Applicable to the general region , flooding areas and seismic regions slope retaining works. Because of its simple form , drawing easy , simple construction and are widely used in railway engineering . Gravity Retaining Structures During the design calculations using a number of assumptions , such as: using Coulomb earth pressure Active earth pressure , converted train loads using soil column . For ordinary railway, which is assumed to meet the basic safety requirements . But with the rapid development of high-speed railway , the train speed and axle load increased retaining wall soil mass will increase by the dynamic action , gravity retaining structures force state security by engineering changes and widespread attention , it is necessary for the translation of the soil column form reasonably loading Pattern and dynamic loads on the retaining wall to improve the stability of research. Papers access to a large number of domestic literature, German , Japanese specification converted railway retaining structures and soil column load schema specification of highway load schemata studied. On this basis , the article by centrifugal model tests and numerical method to analyze the translation of the soil column load Schema on earth pressure behind retaining walls were investigated . Shoulder against gravity walls, walls Balance Weight shoulder two different wall type centrifuge model tests carried out . Comparative analysis of the single distribution test , in-line paved , two-lane distribution , lane paved four kinds of forms and translation translation soil column from soil columns at different distances , etc. retaining wall on the earth pressure behind retaining walls were investigated . FLAC3D numerical analysis using the software , refer to the on-site conditions centrifuge model test analyzes the translation of the soil column load schemata earth pressure behind the wall were studied ; calculated and analyzed the speed of traffic moving at different loads and loads of different soil behind the wall drawings produced pressure and wall stability factor, summed up the dynamic load increases for the retaining wall retaining wall earth pressure and stability were investigated. Through the gravity retaining wall of centrifuge model tests and numerical simulation , draw some meaningful conclusions , hoping to gravity retaining wall for the future study load schemata provide some help .

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CLC: > Transportation > Rail transport > Railway Line Project > Line constructed > Subgrade > Subgrade reinforcement and protection > Subgrade support > Landang buildings , retaining walls
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