道路监控立杆一般只要求使用小规格窨井，为了设备安装方便窨井宜设置在监控杆附近；当地下水位不高时，窨井井底只铺砾石（沙子）垫层，以便雨天在窨井中积水渗入地下，但井壁下则须有混凝土基础垫层，井壁粉水泥沙浆；当地下水位很高时，窨井井底加一层10CM的混凝土垫层，井壁和井底要粉刷防水沙浆；

Road monitoring poling CMC typically requires the use of small specification, to equipment installation convenience of CMC should be set near the monitor rod;Under the local water level is not high, the CMC bottom spread gravel cushion layer (sand) only, so that rain water seeping into underground in CMC, but must have a concrete foundation pad under the wall, wall powder cement mortar;Under the local water level is high, CMC concrete cushion bottom to add a layer of 10 cm, sidewall and bottom hole are painting waterproof mortar;