说明：  现对某土质边坡进行稳定性分析，并采用地下连续墙进行加固。已知土的重度γ=20kN/m3，黏聚力c=42kPa，内摩擦角?=17°，弹性模量E=100MPa，泊松比υ=0.3。混凝土的弹性模量为33Gpa，泊松比υ=0.2。尺寸及载荷如图所示。 分布载荷：q=2000N/m 尺寸大小:a=30+学号尾数（末三位）×0.01（m）； 地下连续墙厚度50cm，总高15m，中心距离坡脚3m。 问：采用地下连续墙进行加固，绘制有墙边坡的滑移带，并给出安全系数（保留小数点后两位）
(In this paper, the stability of a soil slope is analyzed, and the diaphragm wall is used to reinforce it. The known soil's weight is gamma=20 kN/m3, cohesion c=42 kPa, internal friction angle_=17 degrees, elastic modulus E=100 MPa, Poisson's ratio_=0.3. The elastic modulus of concrete is 333pa, and Poisson's ratio_=0.2. Dimensions and loads are shown in the figure. Distributed load: q = 2000N/m Size: a = 30 + number (last three) * 0.01 (m); The diaphragm wall is 50 cm thick, 15 m high and 3 m away from the foot of the slope. Question: The diaphragm wall is used to reinforce the slope, the slip zone of the slope with wall is drawn, and the safety factor is given (two decimal points are reserved).)