土方工程施工技术交底.doc

土方施工技术交底

一、 施工顺序
根据现场土层分布情况，采用分层逐块开挖，首先修建至弃土区便道，然如后图所示，先开挖1号区（顶面标高为53.00~55.55）,开挖至2号区顶面（顶面标高为52.00~52.34），并修建排水沟与取土便道。然后开挖2号区，开挖至3号区顶面（顶面标高为49.31~50.46），然后开挖3号区，开挖至4号区顶面（顶面标高为47.78~48.55）,最后由4号区开挖至43m的标高（因为现在处于雨季，水面标高以至42m左右），待水退以后在挖至规划河底标高。挖除的土方转运至我部租用的当地魏庄村一大小为40亩左右的玉米洼地里。
二、 土方施工
本项工程量为9万m3左右土方，受于场地限制，准备采用1台挖机配合两台装载机同时施工，运土设备采用20台斯太尔自卸汽车进行运输。施工时每台设备配备2名操作工人，分两班倒24小时不间断施工。每日计划开挖土方量3000 m3，由于现在正处于济南的雨季，土层性质黄土为主，含水量高，一遇下雨，整个土方工作面几天不能进行施工，所走便道遇雨又需修整换填。因此估计工期为45个工作日。
1、 施工技术方案及操作要点
土方开挖边坡按1：1考虑，土方开挖前首先经由测量放样，并报监理审批后，然后根据开挖深度定出两边边线。开挖时先做好地面排水，开挖1号区时，运输车辆停放在2号区面上，挖机在1号区顶面由南向北开挖，装载机在2号区面上装运。在K4+700~780范围修建两条6m宽取土便道(两条总长160m)，一条上行道，一条下行道。由于土壤性质为含水量大的黄土，在重车碾压后每隔1小时左右就需装载机重新修整，因此准备回填30cm厚左右的砂砾在便道上。开挖过程中2号区面上，装载机要随时整
Earthwork Construction Technology Details

First, the construction sequence
According to the distribution of site soil, stratified by blocks of excavation, first of all sidewalk construction to spoil area, however as shown after the first excavation on the 1st District (top elevation of 53.00 ~ 55.55), excavation to 2 District No. top (top surface elevation of 52.00 ~ 52.34), and the construction of drains and dug pavement. And excavation on the 2nd District, Area 3 excavation to the top surface (top surface elevation of 49.31 ~ 50.46), and then excavating the 3rd District, excavation to the 4th District, the top surface (top surface elevation of 47.78 ~ 48.55), excavation from the area last 4 to 43m of elevation (as is now in the rainy season, water surface elevation as well as 42m or so), to be dug to the water withdrawal plan after the river bed elevation. Earthwork excavation of the Department of rent transfer to my local Wei Village, a size of about 40 acres of corn in the hollow.
Second, earthwork construction
The project volume of about 90,000 m3 of earth by the space constraints, prepared by a digging machine with two sets simultaneously loaders, earth moving equipment, 20 sets of used dump truck for transport Steyr. Construction of operation of each device is equipped with two workers in two shifts 24 hours a day construction. Earthwork excavation daily plan 3000 m3, as now in the rainy season in Jinan, mainly loess soil properties, high water content, one case of rain, the earth a few days can not face the construction, the pavement when it rains they go need to trim replacement. Therefore estimated duration of 45 working days.
1, the construction technology program and operating points
Earth excavation slope 1:1 considered by the measurement of earth excavation before the first setting out, and report to Commissioner approval, and then set both sides of the excavation depth edges. When the first good surface drainage excavation, excavation of the 1st District, the transport vehicles parked in the 2nd district level, the digging machine in the 1st District, south to north from the top surface of excavation, loader surface shipment in 2 areas . K4 +700 ~ 780 range in the construction of two 6m wide pavement dug (2 length 160m), an on-way street, a downstream Road. As the nature of the soil water content large loess, after rolling in the heavy vehicle every 1 hour loader would need to re-dressing, so ready to backfill around 30cm thick gravel on the pavement. District No. 2 during the excavation surface, loaders to keep the whole