Long Auger Drill Hole Grouting Piles In The Gravel Pit In Water-rich Strata Of Applied Research

In this paper, Taking YunNan YueLing country of gravel rich water formation based on foundation pit engineering project, aimed at large loose gravel strata structure, seepage coefficient, and the design of the foundation pit support scheme and water solutions, and through the numerical simulation of stability analysis have been carried out to verify the safety of the supporting schemes. On surrounding ground deformation of foundation pit construction process at the same time and adverse influence on adjacent buildings settlement are studied, through analyzing the measured data processing, the following conclusions are drawn:(1) use of Beijing is a series of geotechnical software, Swedish article points method for calculating the model, select typical engineering geological profile to the foundation pit slope stability calculation, obtained the foundation pit slope stability coefficient, are less than the design requirements of secondary slope, must take effective measures of foundation pit supporting;(2) combined with the engineering characteristics of geological structure is loose, the permeability coefficient, compare the vertical slope excavation stability parameters, put forward of long spiral drilled pressure filling pile support scheme, for the stability of the scheme in the corresponding supporting structure internal force calculation, the safety and reliability of the supporting structure are analyzed and related conclusions;(3) in view of the high underground water level, the foundation pit water within the calculation of foundation pit, choose long spiral deep stirring pile+pit dewatering well and stop water heavy curtain blind drainage ditch drainage reduction precipitation method. The application of this method in practical engineering, and construction control key points are expounded.(4) in the process of foundation pit construction, the foundation pit surrounding surface, the settlement of adjacent buildings values were observed, and the analysis of measuring point data to the ground settlement around the foundation pit excavation is obtained and the influence law of nearby buildings.