某内纵墙基础埋深d＝1.8m，相应荷载效应标准组合传至基础顶面轴力Fk＝280kN/m，基础埋深范围内土的重度γ＝18kN/m3，地基持力层为中砂，地基承载力特征值 fak＝170kN/m2，试确定基础底面宽度。
参考答案：
初定基础宽度
修正后地基承载力特征值
地基持力层为中砂 ηb＝3，ηd＝4.4
b＜3m，按3m算
fa＝fak+ηbγ(b-3)+ηdγm(d-0.5)＝170+4.4×18×(1.8-0.5)
＝170+103＝273kPa
验算地基承载力
基础宽度改为1.5m
第二节 完形填空(共20小题；每小题1．5分，满分30分) 阅读下面短文，掌握其大意，然后从36—55各题所给的A、B、C、D四个选项中，选出最佳选项。 Liberal education is becoming the task of teachers. It is 36 not only to teach and learn knowledge, but also develop a person' s character. Its 37 is to teach each student to think for himself and make 38 decisions. Now liberal education has a great effect on the world. Much work has been done to 39 a better way of teaching. In a liberal 40 , students are encouraged to have their own thoughts and their own ideas 41 they have lessons which are often held in the form of 42 . They are properly guided to 43 the knowledge learned. Punishment 44 exists. Teachers and students are just like 45 The 46 is of course a perfect one if it can really be carried out. However, it 47 exists in the imagination and will never be realized. We must admit that children should at least be 48 properly. Just close your 49 and think how many students will 50 the duties of a student if they are not pushed. What is the 51 of advice only if it is not supported by a reasonable 52 of control and punishment? It is 53 for us to judge the success and failure of the kind of education now, but 54 the behavior of the children, which is actually the 55 of liberal education, we can see that something must be done to help these children.
38. A. quick 39. A. hold 40. A. class 41. A. after 42. A. playing 43. A. remember 44. A. for ever 45. A. strangers 46. A. idea 47. A. also 48. A. liked 49. A. doors 50. A. order 51. A. meaning 52. A. degree 53. A. easy 54. A. with 55. A. progress |