Study On Subgrade Bearing Capacity Of Highway In The Yellow River Delta Region Of The Shandong Province

Determination of the foundation bearing capacity problem is a complex issue Although in the traditional sense has already been identified are quite mature but there are a lot of traditional methods of the assumptions around the geological background is different now makes use of many practical projects of the foundation bearing capacity of low or high resulting in unnecessary or wasteful projects hidden dangers Therefore it is targeted determine foundation bearing capacity is very necessaryYellow River Delta in an advantageous location resource advantages prominent and a good industrial base has tremendous potential for development The official of Shandong Province plans to speed up the development and construction of the Yellow River Delta in 2007 and build the Yellow River Delta into a new growth pole of the Shandong Province With the development of economy and the increase in traffic volume the scale of development and construction in the area growing, the region has been the opening of a four highways repair and the proposed highway is seven how to quickly and accurately determine the Yellow River Delta in the subgrade bearing capacity of the Highway in the Shandong Provincial Construction has important economic and practical significanceAt present the design Ministerial departments in the other provinces of domestic in the adoption of a unified standard premise carefully collected and the use of a number of advanced integrated testing tools to determine the bearing capacity with regional characteristics table and empirical formula And it is a blank in this area of Shandong regionkOver the years Shandong Provincial Expressway determine the bearing capacity of the foundation is often a great deal of information on the basis of observation of the scene the light at the scene in situ testing indoor soil tests as well as relevant standards and specifications for the implementation Long-term and large-scale testing is necessary to observe the scene but because of the high cost it is offen difficult to achieve by many factors because of excessive consider safety factors , the value of subgrade bearing capacity are often somewhat conservative and difficult to reduce the project cost Therefore in view of the geotechnical characteristics of the Yellow River Delta region the establishment of regional characteristics on the table capacity relations appear to bo particularly urgent In this paper through the establishment of a regional characteristics Table relations capacity for regional highway construction projects provide easy-to-use and rational foundation design parameters to ensure the safety of structures the project cost savings(1) Through the Geological Survey date statistical analysis about the highways that has built in the district, the typical characteristics of the soil and integrated drilling column in the district has described , and in view of the typical soil in this area, 9 physical and mechanical indicators has statistical analysed, for example, its water content porosity ratio and so on the physical mechanics of the Yellow River Delta sedimentary soil has been the statistical results(2) With the project from XinZhuangZi tu TengWang of the RongWu highway Many of the trials were carried out in the Yellow River delta region, due to the principle of different tests the bases of judging soil damage with different test methods are also dissimilar and some test data must be amended with probability statistics and that cause a rather large otherness among value of subgrade beating capacity with different test methods and bring a large inconvenience to scientific effort and engineering practice Since there has a internal relation between the data gathered by different tests and bearing capacity contraposing different lithologic soil body regression analysis is used to establish dependency relation between ratio penetration resistance and subgrade bearing capacity numerical standard penetration and subgrade beating capacity interior geoteehnic parameters and subgrade beating capacity so as to against the othemess in different methods, The empirical formula of eigenvalues for the study of sedimentary soil bearing capacity of the Yellow River region has Established, and a scientific basis that could be Rapid and reasonably ascertain the foundation bearing capacity eigenvalue for the Survey and Design to the Highway in the Yellow River Delta region has provided.