Elasticity soltion of rupture model of shallow earthquake     

Li YU  Zhaohua YANG  Yingyu JIN  Li ZHANG Construction Engineering College  Jilin University  Changchun  China 《东北亚地学研究》2008,11(4):242-245

Based on the theory of elastic mechanics, and using the typical rupture model of shallow earthquake, the authors considered the shallow earthquake as a plane mechanical problem, which was constructed the corresponding mechanical model. By the stress components＇ formulas of the semi-infinite model acted by the finite even shearing force, the main stress is deduced. It is clear that the sector on the right of the center section is squeezed zone, where the maximum principal stress points at the ＂source of stress＂, and that on the left is tensile zone, where the minimum principal stress points to the ＂source of stress＂.  相似文献   

Experimental study on pore water pressure dissipation of mucky soil     

Xianwei ZHANG  Changming WANG  Junxia LI  Bin WANG College of Construction Engineering  Jilin University  Changchun  China 《东北亚地学研究》2008,11(4):251-255

Pore water pressure has an important influence on mechanical properties of soil. The authors studied the characteristics of pore water pressure dissipating of mucky soil under consolidated-drained condition by using refitted triaxial instrument and analyzed the variation of pore pressure coefficient with consolidation pressure. The results show that the dissipating of pore water pressure behaves in different ways depends on different styles of loading. What is more, the pore water pressure coefficient of mucky soil is less than 1. As the compactness of soil increases and moisture content reduces, the value of B reduces. There is a staggered dissipating in the process of consolidation, in which it is a mutate point when U/P is 80%. It is helpful to establish the pore water pressure model and study the strength-deformation of soil in process of consolidation.  相似文献   

Problems and countermeasures on main mineral resource sustainable supply in northeastern China     

Chang LIU  Shouyi LI  Jian GUAN  Tingting ZHANG  Ying CHU  Jing ZHANG . College of Earth Sciences  Jilin University  Changchun  China. English Department  Jilin Agricultural University  Changchun  China 《东北亚地学研究》2008,11(3):150-155

northeastern China is an important old industrial base in China. Mineral resources are the foundation of industry development. However, because of long-term exploitation of mineral resources in northeastern China, the mineral resources reserves decrease gradually and some mineral resources are nearly exhausted, which restricts revitalization and sustainable development of the northeast old industrial base. On the basis of the comprehensive analysis of development and utilization status of mineral resources and supply and demand situation of main mineral resources in northeastern China, the authors put forward countermeasures on main mineral resources sustainable supply in northeastern China.  相似文献   

Integration of GIS and multimedia information based on ORDBMS     

Quanbing HE  Fei WANG  Chao CHEN Computer School  Sichuan University of Science  Engineering  Zigong  Sichuan  China 《东北亚地学研究》2008,11(3):177-181

GIS not includes only spatial data and attribute data, but also multimedia information. How to integrate and manage these data effectively is very important. With the development of the technology of Object- Relation DBMS （ ORDBMS）, it improved the capability of managing complicated information. With ORDBMS, GIS and multimedia information can be integrated together and can speed accessing files by using ＂buffer＂.  相似文献   

滇池磷的现代沉积与环境污染防治对策     

东野脉兴  夏学惠  周建民  田升平  张灼  樊竹青 《化工矿产地质》2004,26(1):1-5,28

在滇池磷现代沉积的实验资料研究,特别是磷块岩生物成矿作用研究的基础上,提出了滇池污染防治的优化对策,即在滇池培养聚磷菌,使其种类及繁衍量大于解磷菌的种类与繁衍量,水体中的磷便可向底泥迁移沉积,底泥中的磷向水体释放也会得到有效控制,富营养化自然改观,环境污染逐渐改善。  相似文献   

坡顶住宅开裂原因探讨     

刘东  匡立新 《化工矿产地质》2004,26(2):117-121

由于边坡挡土墙设计失误、基础施工影响及原事故处理不当等原因,造成施工地段桩基-地基土-挡土墙体系超量位移,从而导致桌坡顶住宅楼开裂。通过在相应部位施工钻孔灌注桩,完善相关排水、隔水系统等措施,使住宅和边坡达到稳定。由此,应引起工程界对坡顶建筑-基础-地基土-边坡支护体系相互作用机理相关问题的重视。  相似文献   

Dynamic Plastic Response of Circular Plates Resting on Fluid with Finite Deformation     

Wang Gang  Li Zhen  Chen Tieyun Ph. D.  Marine Design  Research Institute of China  Shanghai Engineer  Marine Design  Research Institute of China  Shanghai Professor  Dept. of Naval Architecture  Ocean Engineering  Shanghai Jiao Tong University  Shanghai 《中国海洋工程》1998,(1)

This paper concerns the dynamic plastic response of a circular plate resting on fluid subjectedto a uniformly distributed rectangular load pulse with finite deformation.It is assumed that the fluid isincompressible and inviscous,and the plate is made of rigid-plastic material and simply supported along itsedge.By using the method of the Hankel integral transformation,the nonuniform fluid resistance is de-rived as the plate and the fluid is coupled.Finally,an analytic solution for a circular plate under a mediumload is obtained according to the equations of motion of the plate with finite deformation.  相似文献   

An Experimental Investigation on Wave Loading on a Platform Mat     

Miao Guoping  Yao Meiwang  Zhang Chengyi  Ji Chunqun Professor  School of Naval Architecture  Ocean Engineering  Shanghai Jiao Tong University  Shanghai Senior Engineer  School of Naval Architecture  Ocean Engineering  Shanghai Jiao Tong University  Shanghai Engineer  School of Naval Architecture  Ocean Engineering  Shanghai Jiao Tong University  Shanghai 《中国海洋工程》1998,(1)

Overall wave loading and local hydrodynamic pressure distributions on a platform mat in reg-ular waves for shallow waters are experimentally investigated in order to examine the severity of thenonlinear effects and shallow water effects.Wave focusing phenomenon is observed in the tests.The meas-ured results may also provide a comparison basis for the theoretical development to consider the nonlinearinteraction between waves and viscous flow by introducing viscosity into wave theories.  相似文献   

Wave-Current Propagation over a Frictional Topography   总被引：1，自引：0，他引：1  

ZUO Qihua  DING Bingcan Prof. Senior Engineer  River  Harbour Department  Nanjing Hydraulic Research Institute 《中国海洋工程》1998,(4)

—In this paper the parabolic approximation model based on mild-slope equation is used tostudy wave propagation over a slowly varying and frictional topography under wave-current interaction.A governing equation considering the friction effects is derived by the authors for the first time.A simpli-fied form for the rate of wave energy dissipation is presented on the basis of the wave-current action conser-vation equation and the bottom friction model given by Yoo and O＇connor(1987).Examples reveal thatthe present computational method can be used for the calculation of wave elements for actual engineeringprojects with large water areas.  相似文献   

A Numerical Model for Typhoon Surges     

PAN Junning  WANG Hongchuan  YAO Guoquan Graduate Student  River  Harbour Department  Nanjing Hydraulic Research Institute  Nanjing  P. R. China.Engineer  River  Harbour Department  Nanjing Hydraulic Research Institute  Nanjing  P. R. China. Professor  River  Harbour Department  Nanjing Hydarulic Research Institute  Nanjing  P. R. China. 《中国海洋工程》1998,(2)

-In this paper a simple and efficient implicit finite-difference scheme is used for depth-averagedtwo-dimensional storm surge model.This finite-difference scheme is simpler and more efficient than the wi-dely-used ADI scheme.Accuracy analysis and stability analysis indicate that the scheme has two-order ac-curacy and is unconditionally stable when the grid size is constant.The present analysis results show thatthe scheme is of higher numerical accuracy than that introduced by Maa(1990).After tested by ideal mod-els,a calculation example of a real typhoon surge is carried out,the results of the numerical simulation co-incide well with the observed data and the accuracy is sufficient for engineering applications.  相似文献