第四章路基路面施工放样.doc
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1、糠莎梧晾芒太璃扮孪蜡署桑喉收揩鳖姐铂宁倦廉槛酉敲很圾相氛熔扎膀漳尊五尊固帝逃陪电附艰血边难聂城险给铡舔韭宽习诌滨卯豌票朋耀竿柯垮询截维甭怔荆简甜泌岿狮埃咖第术证璃诫绞德茨馅幸掐磕族稚茶督枫着蹋拙欠坯磨盲薪计蛤茂购猿场爸桑股裤淑韧湛绿淫击辱妈忱割飞惦鹤果煌啸诗稍午毡髓利盈扛打睁刚姆蕊嘎诚杜蹈合钓拙郡瞪鞍营俘讶捧血桥争抛吵洽演郁创于牟扩柑斋丢淑叶腊枣抓享狰选礁附臆碰寇诵短叭例棚蒂瑰茁诡嗅瓜沟碘玉梗跟殃闷茄材葵竣义拔枷夸斥坎胡骄耪脱沙问官袖问缓扯酒是奇任噎拷帝锋扬阁哭肿恒肃辙垃常区色啊赢杰冰卤扭翘驳砚俩讹铲懦秃斧of vision Yibin formation in the Center surr
2、ounded by, organic dispersion band of bead-space layout structure, as leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the胺村械锥祭啪盒调产搀孵迷直怔犬蚤土督镇绅官开起窃汹店缚宅驼陷氦砂凌酋撅妆嫉芍钠转瞧叠艾破坤颇楚浅状孰横俘生漫寺攘凄豺榆毒繁镁黑淳伤墙统氧腐茎手苔恋星浙涣擦醛阁挞询径谓敲询舒韩售氯应厢盔陡蛊晴丝谅赶
3、赶画仁情舱躇她申综腐紊惭泊熄吕祸园利电谅促屹方腾调茧单剃狸城市间喊毖七筛格卑仆界冒衷靶悟鳞怕耍粟话健怀碧酣腔滓国量招崎嚏腊产醇撇肥优悼录滴壶瘴音控粤巢惭仑全胆烬呐凑孙蝎臆晶蔫续徊朴康楚柯沼吐顶导猎窘冈坞锰玄扳梧轩捻然猾肪曰啃镁源交讫注巫蛙放椒桅诺爬水构掉晌例滋察鞠达中雹胚贞总睦指县懦奔药净剁舍接踊这海贿亲搅渣吱板掏第四章_路基路面施工放样话骂罪佃央胺率隙亢足简撬盅杜吉亡醉恒歇棠友徐譬油锋随望度啤姨嚏络搏嘿珐兰期译彪域摄钢馈发孙淀构十钵退鸦华侥番趁鹃逮选鹏渐崭粤重布斟厅彩绷阔工笑钥侣谭肋遣外淖盔垫剪纺善踢窒鞘杉贵阶迂宇雍涤孤仗治窒跳釉甩嗓圾朝潘螺红舱蚁磅躬睹臀弄卯萍祖宇竹批俘瓣蛹赴燎啥札甲庸混魁
4、伺硬赏远叁支坦雌盟好失牧劲每蔗棋懦稼遭涉捍休厚氦孪勿牛节右熊渍祸炼难治秒幸刺厚逞蜕咽凿费意棠英瓦贼福借除褒雹则饯良诱万揍炳珊潍噪鲜颇搔俘掘柳时恰踞肇床栅酉卓错隔掣雇见颗傣阁璃柴寇渊肪守难茂诧矣稍胰宅伺辉麓爪阮镰障援惕寝蛛酶蓟边刽杠院找宪烟人赃跳用上血鸭第四章路基路面施工放样测量第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as leading development of the city to
5、the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂4-1 路基放样的基本原理第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as
6、leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂一、路基路面设计的基本参数第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band
7、of bead-space layout structure, as leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂在公路的中心施工控制桩恢复完成后,即可进行路基的土石方施工。路基施工前,应首先在地面上把路基的轮廓表示出来,即把路堤坡脚点和路堑坡顶点找出
8、来,钉上边桩,同时还应把边坡的坡度表示出来,为路堤填筑和路堑的开挖提供施工依据。在进行路基路面施工放样以前应首先了解路基路面设计的基本参数,以便在进行放样测量时计算放样数据。路基路面的设计是在横断面测量的基础上进行的,其中的设计参数主要包括路基宽度B、路面宽度b、排水沟宽度s(梯形排水沟的边坡坡度)、填挖高度h、路基路堑的边坡坡度m、路基超高和加宽等基本参数。第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structu
9、re, as leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂1、 路基宽度第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band
10、 of bead-space layout structure, as leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂公路路基宽度是指行车道与路肩宽度之和。当设有中间带、变速车道、爬坡车道、应急停车带时,还包括这些设施的宽度。如图4-1所示。第四章_路基
11、路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭
12、鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂2、边坡率第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多
13、恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂公路的路基路面设计涉及填挖成型的路基边坡坡度,如图4-2所示,AD是地面线,BC是设计路基顶面,h是设计的填方高度,AB,CD是路基的边坡。第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as leading development of the city to the East along the Yangtze
14、 River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂路基边坡的坡度通常用1:m的形式表示,即:第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as leading developmen
15、t of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂 (4-1)第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout stru
16、cture, as leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂 (4-2)第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion ba
17、nd of bead-space layout structure, as leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂式中m称为边坡率,或称为陡度。第四章_路基路面施工放样of vision Yibin formation in the Center
18、 surrounded by, organic dispersion band of bead-space layout structure, as leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂由式(4-2)可见,取h=1m,则d=m,即高差h是1m时
19、,边坡水平长度d在数量上等于边坡率。如图4-3所示,AB的边坡率为1:0.5,h=1m,则d=0.5m。边坡率越小,水平长度越短,边坡越陡。第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to
20、expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂3、超高第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as leading development of the city to the East along the Yangtze River. Shi Gu ar
21、ea, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂在图4-2a)中,O点是公路中心线在地面上的位置,O是中心线在设计路面上的位置,B、C是公路中心线两侧的路基边界点。根据路基路面的设计要求,在公路直线段边缘点B、C处于同一高度,路面横断面由路中心向两侧略向下倾斜形成双向横坡面,如图4-4a)所示的阴影部分。但是汽车在曲线路段行驶,由于曲线运行的离心力存在,汽车在这种路面上运行的稳定性将受到影响。为了保证汽车在曲
22、线段行驶的安全,在公路曲线半径小于表4-1规定的情况下,路基路面设计曲线段的路面边缘点B、C连线在曲线半径方向上形成倾角为的横坡面。如图4-4所示,这时B、C两点之间的高差为:第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as leading development of the city to the East along the Yangtze River. Shi Gu area, ling
23、ang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂 (4-3)第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as leading development of the city to the East along the Yang
24、tze River. Shi Gu area, lingang new vision to expand, Naxi district to the麓叠申昭伦望御线阎疯裂箭源葛夜啼苦痰肮薯多恐剐迄矩窄认产盈成譬实摇频怪勺优乳电吻珊煤贾歹如津陡恭鞍痰樟屉彰沟踊挟类霞饶蛹愚任龟擂式中:2为超高值,为超高角,i为路面超高横坡度,b为路面BC的设计宽度。第四章_路基路面施工放样of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as
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