土石方開挖施工技術(shù)交底記錄.doc

交底內(nèi)容：
1、開挖前應(yīng)對開挖區(qū)域的原地形進(jìn)行復(fù)測、拍照、報(bào)監(jiān)理審批，作為工程量計(jì)量的依據(jù)。
2、開挖前先作好排水設(shè)施，保證土石方工程排水順暢。
3、挖土應(yīng)由邊到中，分層循序進(jìn)行。當(dāng)開挖至接近路基設(shè)計(jì)頂面時(shí)，應(yīng)根據(jù)土質(zhì)情況注意預(yù)留碾壓沉落高度，其數(shù)值可通過試驗(yàn)確定。
4、路基的尺寸和高程必須符合圖紙要求，不得超挖，同時(shí)應(yīng)根據(jù)施工需要增加工作面寬度。
5、地基的任何部分受到擾動或損壞時(shí)，按照監(jiān)理工程師的要求予以超挖。
6、開挖完后路基要進(jìn)行平整、碾壓。路基壓實(shí)采用重型擊實(shí)標(biāo)準(zhǔn)，路塹以下深度0~30cm內(nèi)路基壓實(shí)度要求達(dá)到95%。如達(dá)不到壓實(shí)標(biāo)準(zhǔn)時(shí)，要進(jìn)行換土處理。
7、整個施工期間，始終對所有挖方和路堤的工程邊坡、路拱和排水溝進(jìn)行修筑，并予以養(yǎng)護(hù)來保證滿足排水的要求。
8、路基在開挖過程中，若遇軟弱地層或障礙物，需采取特殊措施時(shí)，應(yīng)與監(jiān)理工程師和設(shè)計(jì)部門商討處理。
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.
 

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