土石方开挖施工技术交底记录.doc

交底内容：
1、开挖前应对开挖区域的原地形进行复测、拍照、报监理审批，作为工程量计量的依据。
2、开挖前先作好排水设施，保证土石方工程排水顺畅。
3、挖土应由边到中，分层循序进行。当开挖至接近路基设计顶面时，应根据土质情况注意预留碾压沉落高度，其数值可通过试验确定。
4、路基的尺寸和高程必须符合图纸要求，不得超挖，同时应根据施工需要增加工作面宽度。
5、地基的任何部分受到扰动或损坏时，按照监理工程师的要求予以超挖。
6、开挖完后路基要进行平整、碾压。路基压实采用重型击实标准，路堑以下深度0~30cm内路基压实度要求达到95%。如达不到压实标准时，要进行换土处理。
7、整个施工期间，始终对所有挖方和路堤的工程边坡、路拱和排水沟进行修筑，并予以养护来保证满足排水的要求。
8、路基在开挖过程中，若遇软弱地层或障碍物，需采取特殊措施时，应与监理工程师和设计部门商讨处理。
Cards on the table contents:
1 excavation area before the excavation should retest the original terrain, taking photographs, newspaper supervisory approval, as the basis for measuring quantities.
2, make drainage facilities before excavation, earth works to ensure smooth drainage.
3, by the side of the excavation, the layered sequentially. When the excavation to the top surface close to the design of embankment should be compacted under the sink soil conditions allow a high degree of attention, its value can be determined through experiments.
4, the roadbed must meet the size and elevation drawings shall not exceed dug, and construction should be increased face width.
5, the foundation of any part of the disturbed or damaged, according to the requirements of supervision engineers to be super-dig.
6, finished roadbed excavation to finish, rolling. Compaction by heavy compaction standards, the following cutting depth of 0 ~ 30cm subgrade compaction requirements within 95%. If not meet compaction standards, the need for changing soil.
7, during the construction period, and always for all excavation and embankment slope, road humps and drains were built, and be guaranteed to meet the water conservation requirements.
8, roadbed in the excavation process, In case of soft ground or obstacles, need to take special measures, should be supervision of engineers and design departments to discuss treatment.