001人工挖土施工工艺（001 construction technology of artificial excavation）.doc

001人工挖土施工工艺（001 construction technology of artificial excavation） Artificial excavation 1 range The process standard is applicable to the excavation of the foundation pit (groove) and pipe ditch of general industrial and civil buildings and structures. 2 construction preparation 2.1 main equipments: a sharp, flat shovel, hammer, trolleys, ladders, picks, crowbar, ruler, slope ruler, small wire or 20 wire etc.. 2.2 operating conditions: 2.2.1 before excavation, the underground pipeline and other obstructions should be found out, and the ground and underground obstacles in the construction area shall be removed and disposed of according to the requirements of the construction scheme. Location of 2.2.2 buildings or structures or the location of the site of the control line (pile), size standards of foundation pile and gray line, must be tested qualified and finished pre screening procedures. 2.2.3 the surface of the site shall be cleaned and leveled, and the drainage slope shall be well prepared. Temporary drainage ditches shall be dug in the construction area. 2.2.4 during the night construction, reasonable arrangements should be taken to prevent excavation or excavation. The construction site shall be equipped with lighting facilities as required, and obvious signs shall be provided in the danger area. 2.2.5 excavation under the water level of the pit (groove), pipe ditch, should be based on local engineering geological data, take measures to reduce the groundwater level, generally down to below the excavation of the bottom of the 50cm, and then excavation. 2.2.6 familiar with drawings, good technical disclosure. 3 operation process 3.1 process: Determine the order and slope of the excavation To Cut along the edge of the line along the gray line To Layered excavation To Trimming groove To At the end of Qing Dynasty 3.2 determine the slope: 3.2.1 in natural moisture soil excavation pit (groove) and pipe ditch, when the depth of excavation does not exceed the following