论文部分内容阅读
随着我国民航事业的发展,近年来在软土地基上修建机场、跑道的数量日益增多。由于软土具有含水量高、压缩性大、渗透性差、灵敏度高、强度低、土层厚、厚度不均等特点,鉴于土体变形问题的复杂性、计算参数选取的不确定性等因素。目前,软土地基沉降计算的精度还不是很高。加之机场跑道有其自身特点,机场跑道地基为超大面积的平面,而非小面积或条带状;承受的飞机荷载大、飞机轮迹在道面上分散。所以关于机场跑道软土地基沉降计算问题显得尤为重要。本文采用规范法对沿海地区机场跑道软土地基进行沉降计算并与实测值比较,在此基础上运用沉降反分析法对地基最终沉降进行计算预测,探讨该方法在沿海地区机场跑道软土地基沉降计算中的适用性。
With the development of civil aviation in our country, the number of runways has been on the increase in the construction of airports on soft ground in recent years. Due to the characteristics of high moisture content, large compressibility, poor permeability, high sensitivity, low strength, thick soil layers and uneven thickness, soft clay is characterized by the complexity of soil deformation problems and uncertainties of parameter selection. At present, the accuracy of settlement calculation of soft ground is not very high. In addition, the airport runway has its own characteristics. The airport runway foundation is an extremely large area rather than a small area or a strip. The aircraft under load has large loads and aircraft tracks are dispersed on the road surface. Therefore, it is very important to calculate the settlement of soft ground in airport runway. In this paper, using the canonical method to calculate the settlement of the soft soil foundation in the runway of the coastal area and comparing with the measured value, on the basis of this, using the sedimentation back analysis method to calculate and predict the final subsidence of the foundation, and discussing the settlement of the soft ground in the runway of the coastal area Applicability in calculation.