The Researchs On The Calculation Method Of High Slope Lined Lock Chamber Structure

Waterway transport has the advantage of large capacity,low cost and combining with a variety of transport modes.So it is given the widespread concern and attention.Under the growing demand for shipping and the development of low-carbon economy,the new navigation structures increased.Lock as the main type of navigation structures,help the ship pass successfully and make full utilization efficiency of water resources.The design of lock structure is very important.However,the construction of medium-sized lock often has the high slope problems.On the one hand,High slope as a basic environmental building construction,the excavation of slope break the original balance of rock and soil.If not to take measures,it may be loss of stability and damaged;on the other hand,the loads of the completed lock may affect the stability of high slope.Taking the security of locks and high slope into account,the design and construction of high slope lock are relatively complex.This paper is based on an engineering example,and establishes High Slope Lined Lock Chamber finite element model by means of ABAQUS finite element software and analysis the structure and foundation of Lock Chamber stress and strain conditions in each case.Compared with the normal method of lock design,we provides design reference to the actual locks and similar engineering.Specific contents and conclusions are as follows:(1)For Feilaixia second and third line Lined Ship Lock,Lock design takes advantage of normal method to calculate slide resistance factor,resistance overturning safety factor and foundation reaction force in different load cases.(2)Making the use of the ABAQUS finite element software,analysises unearthed and excavated rock geostatic stress surround the Lock Chamber.And the finite element stability calculation of the chamber is based on excavated rock geostatic stress surround the Lock Chamber.(3)Making the use of the ABAQUS finite element software,establishes three-dimensional full-scale model of Lock Chamber and the surrounding rock,analysis lock structure stress and displacement distribution in different load conditions,checks the strength of the accounting section,and calculates the foundation reaction force,compares with analytical method results.The results showed that: the tensile stress and pressure stress in different load cases are less than the standard value of strength of concrete and meet the design requirements.Foundation stress distribution is essentially the same,the basic foundation settlement is within 1mm,fully meets the requirements of engineering deformation;pay attention to the bottom by high slope side locks stress concentration area particularly,the stress is about 2.6Mpa.Construction should be focused on strengthening the excavation,prevent its damages.The result of Analytical method is relatively large and partial safety.Taking the whole group contacts between nonlinear rock and rock foundation into account,we can consider combining the analysis of finite element with analytical method to guide the actual large-scale engineering design.