Advanced Materials Research Vols. 838-841

Abstract: In order to reveal the heat conduction direction on roadbed, a series of theoretical analysis and mathematical derivations are used. Through simplifying the frozen soil layer as an equivalent homogeneous frozen body, the physical model of heat conduction was founded. Also, applying the entropy change of the thermodynamics second law, the direction of the actual heat transfer was analyzed. Further more, the three-dimensional and two-dimensional differential equation of unsteady heat transfer in Cartesian model were obtained by using Fourier's Law and importing the micro unit. It has significant senses for deep research of roadbed tympanites.

Abstract: The physical model and calculating model of temperature field are founded according to the founded controlling equation. By simulating the changing progress of climate features, the temperature field of roadbed in permafrost region in different season was obtained. And some results are got by analyzing the diversity of temperature of key points. The last, the technology assumption of effectively controlling tympanites which combines replacing part frozen soil and resisting highway tympanites structure is brought up.

Abstract: In order to study anti-cracking performance for geosynthetics, the splitting and fatigue test of bituminous mixtures with geosynthetics and without geosythetics are carried out. The mechanical performance for tensile strength and elastic modulus of asphalt mixture are obtained through two tests. The tensile strength and elastic modulus of bituminous mixture are increased by 14.9% and 54.9% respectively. Through adding the geosynthetics overlay to achieve the purpose of retarding the development of cracks in the pavement.

Abstract: At present, there are depth research for the CBR and rebound modulus of roadbed loess in the country, but there is not a systematic research for the relationship between the CBR and rebound modulus;There are the site CBR and rebound tests for the Shanxi typical raodbed loess to study the law of CBR and rebound modulus. The results showed that:The Jinnan roadbed loess is bigger than Jinxibei roadbed loess for the increase slope of CBR and rebound modulus with the compaction degree; The rebound modulus increases with the mounting of CBR for Jinnan roadbed loess and Jinxibei roadbed loess. The relation are line function and the correlation are all better.

Abstract: In this paper based on the foundation construction of Datong Xian high-speed railway, a large number of test samples have been taken. The order and contribution rate of every experiment factor like cement commingle ratio, depths, water dipping conditions, compacting factor and vibration frequency on the dynamic characteristics of cement-improved loess such as dynamic elastic modulus, dynamic deformation, damping ratio by dynamic triaxial test, which orthogonal test method has been applied to. The dynamic load was calculated according to the train vibration attenuation rule of different depth. The dynamic characteristics of cement-improved loess such as dynamic deformation, dynamic elastic modulus, damping ratio were got form the dynamic tests of long time and large number of cycles. The results showed that with the increase of cement ratio, the dynamic characteristics of cement-improved loess are more better, there is no optimal ratio of cement.

Abstract: We sum up the reservoir space types and characteristics of clastic rock reservoir ShiWu fault depression rift layer study area, through core observation, microscope, scanning electron microscope and mercury injection methods, and discuss the development characteristics and formation mechanism of pore and fracture. A large number of core analysis, drill results and test mining research has confirmed that the study area is constructed by the strong force, the micro-cracks are well developed, it is not only important reservoir space, but also the flow of oil and gas wells to obtain high yield important seepage paths, is to obtain yield the necessary conditions.

Abstract: Air foam drilling is adopted generally for its high rate of penetration, lower pollution to the reservoirs and low costs. Only when there are low formation pressure, long interval favorable formation, clear non-gas or non-oil formation and lower pay zone, air foam drilling can realize its advantages including maximum increasing rate of penetration, protecting reservoir and lowing the cost.

Abstract: We study the Changling fault depression layer reservoir space type and characteristic of clastic rock reservoirs in the study area, by core observation, thin section analysis, cathodoluminescence analysis, scanning electron microscopy and mercury intrusion method, and discusses the development of secondary porosity and fracture characteristics and formation mechanism.

Abstract: Badain Jaran Desert is the third largest desert of China. The research on aeolian geomorphology resources will be beneficial to the sustainable development of tourist industry and environment in the Badain Jaran Desert. This paper uses these basic geographical data, such as ETM+, 1:50,000 topographic map, GDEM, Google Earth data and so on. Then we integrate geological surveys in the field and summarize the characteristics of aeolian geomorphology resources. By combining with tourism projects of aeolian geomorphology resources set in other scenic area, the tourism development projects of aeolian geomorphology resources and desert environment in the study are put forward with the purpose of offering practical advice for tourism development of aeolian geomorphology resources and the control and utilization of desert environment in the Badain Jaran Desert.

Abstract: Core observation and indoor thin section analysis as well as other technical means systematically studies the clastic reservoir rock characteristics of Shiwu Fault Depression.The study found that Shiwu Fault Depression deep buried clastic are composed mainly by fine sandstone and medium sandstone,and grain size are mainly controlled by sedimentary facies.Interstitial material is mainly carbonate and shale,secondly kaolinite.These characteristics provide a petrology foundation for accurately predicting the reservoir’s development of favorable zones in this region, and for further developing the deep buried clastic accumulation regularity.