便道施工方案

1、施工里程、便道尺寸及会车道设置
因受房屋拆迁的影响，本段工程施工便道由105国道引入，从中江高速公路桥下42号墩处往小里程方向修建，便道起屹于DK52+054.09，长1.4km，修在线路左侧，设为无坡便道。
便道尺寸路基宽度4.5m，路面宽度3.5m，根据车流量情况以及施工过程中，车型的不同，初步定为每隔200～300m设一处错车道，错车道路基宽度6.5m，路面宽度5.5m，长度15m，设置位置分别为8～9#墩之间DK52+324.33～DK52+339.33、15～16#墩之间DK52+553.51～DK52+568.51、22～23#墩之间DK52+782.69～DK52+797.69、29～30#墩之间DK53+11.75～DK53+26.75、37～38#墩之间DK53+257.35～DK53+272.35。便道左侧设50×50cm的边沟。
2、便道填料
便道填料底层采用混碴填筑，承重层采用50～60cm厚片石填筑，面层采用10～20cm厚碎石铺填。
3、施工方法及养护
(1)先清除便道内树木、垃圾及有机物残渣，然后在便道左侧开挖边沟，结合农田水系，在必要的地方设置排水设施。
(2)第一层混碴填筑：根据地形情况决定填筑用
Sidewalk construction program

1, the construction mileage, pavement size and will Drive Set
Due to the impact of house demolition, the construction of this section of road on State Road 105, introduced by the, from Pier No. 42 River Highway Bridge Department to the direction of the construction of a small mileage, pavement from the Yi in DK52 +054.09, length 1.4km, repair the line on the left , Make no slope pavement.
Pavement subgrade width dimensions 4.5m, surface width of 3.5m, according to traffic flow as well as the construction process, the different models, initially at intervals of 200 ~ 300m set a wrong lane, the wrong car road base width 6.5m, road surface width of 5.5 m, length 15m, set the location were between 8 and 9, pier DK52 +324.33 ~ DK52 +339.33,15 ~ 16 # pier between the DK52 +553.51 ~ DK52 +568.51,22 ~ 23 # pier between the DK52 +782.69 ~ DK52 +797.69,29 ~ 30 # pier between the DK53 +11.75 ~ DK53 +26.75,37 ~ 38 # pier between the DK53 +257.35 ~ DK53 +272.35. Sidewalk on the left of the ditches located 50 × 50cm.
2, pavement filler
Pavement filler mix ballast by filling the bottom, load-bearing layer is 50 ~ 60cm thick rubble filling, surface layer is 10 ~ 20cm thick stone the filling.
3, construction methods and conservation
(1) to clear the trees within the sidewalk, garbage and organic residues, and then left in the pavement digging ditches, combined with agricultural water, where necessary drainage facilities.
(2) The first layer of mixed slag filling: Filling the decision in accordance with terrain conditions