Advanced Materials Research Vols. 368-373

Abstract: By the studying and comparing of some old house in Nanning, we find something same: they have simple structure, good ventilation, preventing over sun, homely decoration, and so. They are fit for their surroundings: sub-tropic, pan, river bank. they have something resemble with the houses of minority in Guangxi municipality. They can be used for reference to the building in county without air-condition. The attention and research of these buildings contributes much to the further promotion of green architecture in this region.template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

Abstract: It has been a long time that two kinds of resident habitations and the corresponding administration systems have been present and functioning in Chinese cities and countries. In recent years, with the rapid development and expansion of city, many villages have been gradually incorporated into city zone and as a result villages in urban district, normally called in-city villages, come into being, which are sarcastically against the grain with all aspects of city zone. This paper studies the problem by the theory of dualistic structure of city and country, and analyzes the transition and causes from the point of view of city development, especially on the change process, i.e., from neighboring village to village which is half incorporated by city, and finally to the in-city village. For the purpose of illustration, investigates the causes of transition and engendering of in-city villages with respect to city expansion and village urbanization. The result of this study is anticipated to be of some significance to perform the full-scale city modernization and to establish a harmony society.

Abstract: Chinese traditional culture has a distinct nationality and regionality, and serves as the source of valuable creative element in architecture, at the same time it functions as the powerful weapon resisting “internationalization” and “standardization”. This paper questions the lack of nationality and regionality in current architecture industry, hopes to find the correct expression of Chinese traditional cultures in contemporary architectural design through case study, and aims to find the general application approach of traditional culture symbols in architecture.

Abstract: An experimental methods was used to study the reasonable distance of tunnels with small spacing, four tunnels were located in a model, the distances between them were 0.5D, 1.0D and 1.5D respectively. The results show that the stress is concentrated in the folder of rock due to the superimposed stress fields, intensive vertical cracks emerged in the folder rock, then folder rock buckled, finally, the crown area of the tunnel sank. The thickness of the folder rock is the crucial factor for the stability of the tunnel, when the thickness is less than 0.5D, the folder rock failed first, when the thickness is as much as the span of the tunnel, the individual dilapidated area in the folder rock will not intersected with each other, the middle area of the folder rock is still in a stable state, as a result, the folder rock can maintain in a stable state.

Abstract: The vertical structural stability of floating drilled shaft during sinking is an important practical issue on the safety of boring technique in the deep and thick alluvium. In fact, the vertical structural stability of shaft lining is a matter of overturn buckling. Theoretical analysis shows that the height of balance water (HBW) is the most important factor for the vertical structural stability of shaft lining. If the HBW is controlled in a reasonable range, the shaft lining will not buckle during construction. The shaft lining is regarded as a slender bar with closed bottom and floating in the mud while sinking. According to the mechanical analysis on the shaft lining from floating and sinking to the process of contacting the well bottom, a reasonable range of the HBW is deduced. Finally, with practical instances, the author in this article introduces the calculation principle in vertical structural stability of shaft lining while sinking and floating using finite element method (FEM). The simulation results show that in the reasonable range of HBW, the stability of shaft lining increases as the height of balance water goes up.

Abstract: Rammed earth is a construction form featuring energy saving and economical. However, affected by many factors, the existing rammed earth buildings, in the course of usage, would emerge various forms of cracks. Based on the research findings on rammed earth buildings in northwest, north, central and southwest regions of China, crack forms of rammed earth walls and the formative mechanism were analyzed, in turn corresponding preventive measures were proposed in this article.

Abstract: The test study the creep property of artificial frozen clay at different frozen temperature by independently developed uniaxial creep testing machine WDT-100, the test result indicated that the nonlinear creep property of deep artificial frozen clay can be described by the function as ε=at^b. It is found that the creep of deep frozen clay can be calculated by genetic theory through contrastive study, analysis of parameters of genetic creep kernel function shows that the parameter a and creep stress are exponential relationship while linear correlation with test temperature, parameter b is only related to creep stress.

Abstract: Scanning observation on meso evolution of fracture in concrete is carried out by means of computerized tomography (CT) on uniaxial compressive condition. The cracks in the mortar expansion, in particular, the bond of mortar and aggregate which is key regions of concrete damaged, are drawn out through CT image and CT data, and the destruction process of the concrete can be divided into four stakes, compression, enlargement, the expansion of the CT crack,and destruction. According to the character of CT image，MMD is used to analyze the CT images of the concrete specimens in 4 stages of deformation. The components of the CT images are classified and the spatial distributions of crack or cavity, mortar and aggregate are obtained. The variation process of the relationship between distributions of crack or cavity magnitude and stress are obtained from classification maps. The specimens experienced the process of condensed, volume expansion, crack propagation, coalescence and failure. The method can not only reflect the spatial distribution of the materials but also simplify the following analyses that follow.

Abstract: Safety and reliability of lining structure of tunnel affect the using of the tunnel. Inspection method Pearson is used, based on reliability mathematical knowledge, the article analyses the reliability of lining structure of tunnel and putts forward the regularity of distribution for the thickness of tunnel lining. At the same time, from the Angle of reducing the tunnel construction cost, the paper putts forward the method of saving the construction cost through mathematical statistics knowledge.

Abstract: In the passage, the process of selecting location, size, set out, dig kilns etc of the cliff-cave and sunken cave were discussed, as well as some of the requirements they should meet. The location selection is important. Then a number of structural, waterproofing and drainage measures were proposed. Finally, some construction points were mentioned, and thickness of overlying soil, span and height of the cave, kiln leg width, sidewall height etc should be checked after completion.