6.3.1 Installation of the cylinder: excavate a test pit with a sizematched to the cylinder at the bottom of the test adit, remove looserocks on the bottom of and around the pit, and then pour a levelinglayer of C30 concrete at the pit bottom. Afterwards, ...[繼續(xù)閱讀]

    6.4.1 The maximum test pressure should be no less than 1.2 timesof the design pressure. The pressure shall be graded into no less than5 levels, and be applied grade by grade according to the maximumpressure.6.4.2 Observe the initial stable reading of meas...[繼續(xù)閱讀]

    6.5.1 The void ratio under every level of pressure after deformationstabilizes is calculated by Equation (6.5.1-1):Where:ei＝void ratio under a certain level of pressure.e0＝initial void ratio of rockfill.Δhi＝height variation of sample under a certain level...[繼續(xù)閱讀]

    7.1.1 Main equipment and apparatus(1) Water outlet bin: steel plate made, square frame shaped, havingcertain rigidity, meet the size requirement after specimen preparation,and height should be no less than 25 cm. Set up a water outlet 15 cmfrom the bottom...[繼續(xù)閱讀]

    7.2.1 Main apparatus shall comply with requirements of 7.1.1.7.2.2 Specimen preparation(l) Select a representative soil layer, determine test points and cut theupper part of test soil layer after a protective cover of 10 cm thick isreserved.(2) Predetermi...[繼續(xù)閱讀]

    7.3.1 The dry density and void ratio under various levels of headare calculated by Equation (7.3.1-1) and Equation (7.3.1-2):Where:ρd＝dry density, g/cm3.n=void ratio, %.md＝dry mass of specimen, g.A=measured sectional area of specimen, cm2.h=actual height ...[繼續(xù)閱讀]

    8.1.1 Bearing plate: circular or square steel plate, ratio between thediameter or side length of bearing plate and the maximum particlesize should be no less than 5, area of the bearing plate should be noless than 1000 cm2 for clay core and fine filter ma...[繼續(xù)閱讀]

    8.2.1 The gross thickness of test position after compaction shall benot less than 2.0 m.8.2.2 The test position shall be flat on surface, and its length, widthor diameter shall be 3 times greater than those of bearing plate.8.2.3 In removing surface scum ...[繼續(xù)閱讀]

    8.3.1 Level the surface of test points before the installation ofbearing plate. In case of large surface fluctuation, fill it withfine-grained materials of limited maximum grain size. Thefine-grained materials added should be less than 1.5 cm thick forcla...[繼續(xù)閱讀]

    8.4.1 Apply load level by level. Load increment of every level shallbe 1/10 to 1/8 of the estimated ultimate load.8.4.2 Successive load application shall be adopted. Measuresettlement after each load increment. Interval for settlementobservation after eve...[繼續(xù)閱讀]