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为了研究月壤的工程力学特性,采用静力触探模型箱进行了0°,15°和30°三种不同贯入倾角下的TJ-1模拟月壤静力触探试验。试验结果表明:静力触探试验终止探头退出土体后,地表产生不同的变形模式,贯入倾角愈大地表变形范围愈大,垂直贯入表层模拟月壤形成以贯入点为对称中心的圆柱形孔洞,倾斜贯入情况下表层模拟月壤形成一个椭圆形的陷落坑;不同贯入倾角下贯入阻力都随贯入深度的增加而增大,同一垂直贯入深度处贯入阻力随贯入倾角的增大而线性增加,可用公式c 1 1q A b表示;垂直静力触探试验贯入阻力随深度的变化趋势可以采用公式c h0q exp[0.16(9)]估算;不同贯入倾角下探头周围的水平土压力均随贯入深度的增加先增大再减小,同一深度处贯入方向前侧土体水平土压力峰值随贯入倾角的增大而线性增加,后侧土体水平土压力随贯入倾角增大而线性减小,二者的变化规律均可用公式h,max 2 2p A b表示;600 mm深度处的垂直土压力终值随贯入倾角的增大而线性减小,可用公式p v,end 0.3179 26.448表示。
In order to study the engineering mechanics characteristics of lunar soil, static TJ-1 simulated lunar hydrostatic penetration test was carried out under three different penetration inclinations of 0 °, 15 ° and 30 ° using a static probe model box. The experimental results show that: after the static probe touches off the probe, the surface has different deformation modes. The larger the penetration angle is, the larger the deformation range is. The vertical penetration into the surface simulation lunar soil forms the center of penetration with the penetration point The cylindrical hole and inclined penetration form an oval-shaped depression pit on the lunar surface. The penetration resistance increases with penetration depth at different penetration angles. The penetration resistance at the same vertical penetration depth Inclination increases linearly with increasing inclination, and can be expressed by the formula c 1 1q A b. The trend of penetrating resistance with depth in vertical static penetration test can be estimated by the formula c h0q exp [0.16 (9)]; Under the angle of inclination, the horizontal earth pressure around the probe first increases and then decreases with the increase of penetration depth. The peak value of soil pressure at the front soil depth increases linearly with the penetration angle at the same depth, The earth pressure at the body level decreases linearly with the increase of the penetration angle. Both of them can be expressed by the formula h, max 2 2p A b. The final value of the vertical earth pressure at the depth of 600 mm increases with the penetration angle Linear decrease, available formula pv, end 0.317 9 26.448.