������Ҥ�����ڹ��������������Ϊ��ˮ�ʣ� 120% �ij�������Ϊ�о��������Ĵ����������ô�װɳ������Ĥ��Ч�׾�80 �� 100 μm �Ϳ׾��� 75 μm ��3 ����ˮ�壬0. 4 m ��0. 8 m ��2 ����ˮ��࣬����6 ��������������Ԥѹ�������о���ͨ���Ա��������̬���г����Ż����㣬����3 ��ģ�ͽ��г���Ԥ�⣬��ϼ�������������Ϊ��ˮ����Ϊ0. 4 m����Ч�׾�≤75 μm �Ĺ���B ����ˮ��Ч����ѡ�

The soil dealt with the third project in Dayaowan of Dalian is ultra-soft soil with moisture content �� 120%�� In order to study the processing method of ultra-soft soil��the vacuum preloading experiment of 6 orthogonal model boxes has been done with three drainage bodies ( bagged sand well and two kinds of filter membrane with equivalent opening sizes are 80 �� 100 μm and �� 75 μm) and two drainage distances ( 0. 4 m and 0. 8 m) �� Using the three models for settlement prediction��through the optimization calculation of the surface settlement morphology�� the authors consider that the effect of domestic B-type drainage plate with drainage distance is 0. 4 m and equivalent opening size ≤75 μm is the best combined with monitoring and calculation��