Engineering Research Equipment for the Validation of a New In-Situ Soil Testing Technique

新罕布什尔大学（University of new Hampshire）正在开发两种新设备，用于测量土壤的原位横向应力和强度，以及模拟地震载荷下全循环应力逆转下土壤的刚度退化。这些技术的验证需要将使用这些装置获得的结果与其他土壤现场试验的结果进行比较。这将通过购买叶片镗床和平面膨胀仪来实现。1985年墨西哥城地震再次强调，有必要能够描述地震荷载作用下粘土的原位行为。然而，在破坏性地震引起的应变范围内，尚无普遍接受的方法来测量这种野外行为。新罕布什尔大学正在开发的自镗孔压力计和循环压力计显示出能够满足这一需求的巨大希望：这些设备的验证将大大有助于购买叶片镗孔机和平面膨胀计。

Two new devices are being developed at the University of New Hampshire to measure the in-place lateral stresses and strength of soils, as well as the stiffness degradation of the soil under full cyclic stress reversal, simulating earthquake loading. Validation of these techniques requires that the results obtained using these devices be compared with the results from other field tests of soils. This will be achieved with the purchase of a vane borer and a flat dilatometer. The Mexico City earthquake of 1985 has emphasized once again the need to be able to characterize the in situ behavior of clays subjected to earthquake loading. However, no generally-accepted method exists for measuring such behavior in the field over the range of strains induced by a destructive earthquake. The self-boring pressuremeter and the cyclic pressuremeter being developed at the University of New Hampshire show great promise of being able to meet this need: the validation of these devices will be greatly assisted with the purchase of a vane borer and a flat dilatometer.