《道路勘測設(shè)計(jì)》第4章橫斷面設(shè)計(jì)課后習(xí)題及答案

1、1第四章橫斷面設(shè)計(jì)4141某新建三級(jí)公路，設(shè)計(jì)速度某新建三級(jí)公路，設(shè)計(jì)速度V＝30kmh30kmh，路面寬度，路面寬度B＝7m7m，路拱，路拱，%2?Gi路肩路肩，路肩橫坡，路肩橫坡。某平曲線轉(zhuǎn)角。某平曲線轉(zhuǎn)角，半徑，半徑mbJ75.0?%3?Ji800534??????，緩和曲線，緩和曲線，加寬值，加寬值，超高，超高，交點(diǎn)樁號(hào)為，交點(diǎn)樁號(hào)為mR150?mLs40?mb7.0?%3?hiK7086.42K7086.42。試求平曲線上。試

2、求平曲線上5個(gè)主點(diǎn)及下列樁號(hào)的路基路面寬度、橫斷面上的高個(gè)主點(diǎn)及下列樁號(hào)的路基路面寬度、橫斷面上的高程與設(shè)計(jì)高程之差：程與設(shè)計(jì)高程之差：①K7030K7030；②K7080②K7080；③K7140③K7140；④K7160④K7160。解：解：已知：JD＝K7086.42，，，800534??????mR150?mLs40?⑴平曲線要素計(jì)算：平曲線要素計(jì)算：）（mRLps44.015024402422????）（mRLlqSs99.1

3、91502404024024022323??????）（mtgqtgpRT19.6799.192800534)0.44150(2)(???????????????)(21.13140800534150180L180mRLs??????????????)(67.75012800534sec)0.44150(2sec)(mRpRE??????????????）（mLTD17.321.13119.6722??????（2）主點(diǎn)里程樁號(hào)計(jì)算）主

4、點(diǎn)里程樁號(hào)計(jì)算JDK7086.42T67.19ZHZHK7019.23K7019.23Ls40HYHYK7059.23K7059.23ZHK7019.23L2131.212QZQZK784.84K784.843????????????0.0744010.773%70.752%0.752%3%0.75??????????????chJGJGJJLxiBbibiibh外093.0%2273%0.752???????GJJiBibh中????

5、0.00372%19.073%0.75???????GxJJJibbibh內(nèi)ΔΔZH(K7019.23)同HZ(K7150.43)，，；mxx67.2600???mbx0?????0.00752%3%0.75??????GJJiibh外093.0%2273%0.752???????GJJiBibh中0.00753%0.75????GJJJibibh內(nèi)HY(K7059.23)、K7080、QZ(K7084.834)、YH(K7110.43