第4期 张志红等：非饱和土固结理论新进展 671
在多次降雨入渗和蒸发条件下的损伤场变化[34]。
2003年，沈珠江[35] 在孔隙气的排气率等于常 量的假设下，建立了非饱和土的简化固结理论，并应用于裂隙粘土中雨水入渗过程的数值模拟，得出了土体吸力丧失、有效应力降低和膨胀回弹的全过程，算例结果合理，只是孔隙气排气量的设定尚有待进一步研究。
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3 结 语
黄土的湿陷和膨胀土的湿胀是应用非饱和土固结理论的两个最重要的工程领域[36]。非饱和土固结理论的另一个重要应用领域是与冻土有关的工程问
题。即使对于沿海软土地区，非饱和土力学同样也有重大的应用前景。另外，硬粘土地区开挖边坡的稳定问题，显然也与吸水软化有关，同样可以应用这一理论进行分析。几十年来，岩土工程界已经对非饱和土固结理论开展了大量的研究工作，积累了大量资料，也取得了很大进展，但是由于问题的复杂性，关于非饱和土固结理论的研究还很不成熟，需要广大科研工作者的共同努力。
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