Pile - Net Composite Foundation In The Loess Region In The Large Thickness Backfill Application

Due to human activities and natural causes, filling the upper part of the complex engineering geological conditions are more and more sites, followed, filling the venue use and handling of fill ground, directly affect the project duration, cost and construction (structures) used for the use of fill ground has caused wide attention, to fully tap the processing method of filling the foundation has become an important issue for ground treatment.Many common ground has been uneven settlement construction issues, through the territory of Bingling Gansu inspection or testing changes, that there is differential settlement of foundation problems, this paper describes the engineering pile - a large thickness of the net composite foundation reinforced backfill the situation on the Loess Site.Subnet pile composite foundation method as proposed in recent years the foundation of a relatively new approach in a number of projects have been successful, the construction method effectively horizontal and vertical reinforcement to enhance the body for utilization in the works ground treatment can improve the bearing capacity at the same time effectively reduce the basis of the settlement and differential settlement, gradually being geotechnical engineering of all ages. But now, in the loess area of theoretical research in this regard is still in its infancy. In this paper, specific examples of projects, the construction method to make some simple theoretical analysis and research.To this end, the paper first analyzes some problems in the original space, through the experimental analysis of survey and geotechnical site uneven sedimentation.Again, introduced the mechanism of composite foundation pile subnet, simple set of cement dust piles and reinforcement mechanism of sarcoplasmic reticulum. Further analysis of the use of theoretical knowledge subnet composite foundation pile mechanism, combined with the scene of the pile-soil stress ratio of the measured data of soil stress ratio and load, pile spacing and pile-soil properties and other factors were studied.Then, after completion of the project, through the comprehensive analysis of test results, treatment of the site geotechnical engineering, piles - net effect of composite foundation meet the design requirements. Based on piles - net composite foundation theory, the use of cement dust piles - net composite foundation grout backfill in a complex application of the land area for the future in the filling area, a large thickness of the collapsible ground treatment area to provide the construction, strengthening mechanism , testing and related parameters such as experience and evidence.