Gu Q.-K.,PLA Air Force Aviation University |
Zhang R.-Y.,PLA Air Force Aviation University |
Qu B.,PLA Air Force Aviation University |
Li Y.,Design Academy of Chengdu |
Liang L.,94865 Troops
Chang'an Daxue Xuebao (Ziran Kexue Ban)/Journal of Chang'an University (Natural Science Edition) | Year: 2015
In order to apply the situ loading test to the calculation of foundation settlement, this paper adopted theoretical derivation to calculate the compressive modulus of the loess foundation in Yan'an based on the test data. The results show that the point that conforms to complete confining stress state is located in 0.834 times of the radius under the center of loading plate. The P-S curves of the loading test can be transformed into uniaxial compressive stress-strain curves through multiplying the load (P) by 0.737 and multiplying the settlement (S) by the ratio between 0.522 and the radius of loading plate (R). And then, the compressive modulus is obtained. The average of the compressive modulus obtained from the present method is in agreement with the laboratory test results, and the difference between them is only 5.53%. Due to the prevention of the soil disturbance, the dispersion of the compressive modulus form the present method is lower than the laboratory test results, with variance reduction of 57.2%. The result of the present paper provides reference for the improvement of the test method of compressive modulus and the calculation of the foundation. ©, 2015, Editorial Department of Journal of Chang'an University (Natural Science Edition). All right reserved.