交底內(nèi)容：
一、土方開(kāi)挖：
1.  溝槽開(kāi)挖前的準(zhǔn)備工作：
(1).  根據(jù)設(shè)計(jì)圖紙的設(shè)計(jì)要求進(jìn)行測(cè)量放線，定出中心樁、槽邊線。
(2).  先查明段地下管線及其它地下構(gòu)筑物情況，會(huì)同有關(guān)部門作出妥善處理，確保施工安全
(3).  溝槽開(kāi)挖前應(yīng)做好溝槽外四周的排水工作，保證場(chǎng)外地表水不流入溝槽。
(4).  按工程監(jiān)測(cè)要求，開(kāi)挖前先布置各種類型的觀測(cè)點(diǎn)，并測(cè)定初始資料。
(5).  準(zhǔn)備好所有的機(jī)械設(shè)備及場(chǎng)內(nèi)外運(yùn)輸?shù)缆罚�以利土方開(kāi)挖工作連續(xù)快速完成。
2.  溝槽開(kāi)挖方法：
(1).  開(kāi)挖方式以機(jī)械開(kāi)挖為主，人工開(kāi)挖進(jìn)行配合。土方采用分段分層開(kāi)挖的方式進(jìn)行，開(kāi)挖深度3.0m以內(nèi)的采用挖掘機(jī)一次開(kāi)挖至距溝槽底20.0cm，開(kāi)挖深度超過(guò)3.0m的，采用挖掘機(jī)分兩次開(kāi)挖至距溝槽底20.0cm，挖出的土方用自卸運(yùn)土車運(yùn)至指定余泥堆場(chǎng)。
(2).  溝槽基底標(biāo)高以上20cm的土層，采用人工開(kāi)挖、清理、平整，以免擾動(dòng)基底土，嚴(yán)禁超挖。
溝槽開(kāi)挖過(guò)程中，不同土層面標(biāo)高須報(bào)驗(yàn)監(jiān)理、業(yè)主確認(rèn)，并做好
Cards on the table contents:
1, earth excavation:
1. Trench excavation preparatory work before:
(1). According to the design drawings of the design requirements for measuring and setting out, set the Pile, groove edges.
(2). First identify the section of underground pipelines and other underground structures in the situation, together with relevant departments to provide appropriate treatment to ensure the construction safety
(3). Trench excavation should be prepared prior to the drainage trench around the outside work to ensure that surface water does not flow outside the trench.
(4). According to project monitoring requirements, layout of various types of excavation prior to the observation point, and the determination of the initial data.
(5). Ready for all the mechanical equipment and OTC road transport to facilitate the rapid completion of a continuous earth excavation work.
2. Trench excavation methods:
(1). Excavation by mechanical excavation of the main excavated to meet. Sub-layer earth by way of excavation, the excavation depth of less than 3.0m with an excavator from the trench excavation to the end of 20.0cm, excavation deeper than 3.0m, the use of excavators digging in two to from the trench bottom 20.0cm, earthwork excavated earth with dump trucks to the named Yuni yard.
(2). Trench 20cm above the basement level of the soil, using artificial excavation, clearing, leveling, to avoid disturbance of soil substrate, is strictly prohibited overbreak.
Trench excavation, the different levels of soil test level shall be reported to the Commissioner, the owners recognized and well
 

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