土方回填压实技术交底.doc

土方班技术交底内容：
(1) 填方施工应从场地最低处开始，水平分层整片回填碾压或夯实。必须分段填筑时，每层接缝处应作成斜坡形（倾斜度应大于1：1.5）碾迹重迭0.5m~1.0m，上、下层错缝距离不应小于1m。
(2) 为保证填土压实的均匀性及密实度，避免滚子下陷，在重型碾压机碾压之前，应先用轻型压实机械（如推土机、汽车）推平，低速行驶压4~5遍，使表面平实。
(3) 碾压机械压实填方时，应控制行驶速度，超过一定限度，压实显著下降。一般不应超过下列规定：平碾、振动碾2km/h，羊足碾3 km/h。
(4) 机械填方时，应保证边缘部位的压实质量。
(5) 用压路机进行大面积填方碾压时，应从两侧逐渐压向中间，每次碾压轮迹应有15~20cm的重迭度，避免漏压，轮子的下沉量一般压至不超过1~2cm为度。碾压不到之处，应用人力夯或小型夯实机械配合夯实。
(6) 平碾碾压一层完后，应用人工机械（推土机）将表层拉毛。土层表面太干时，应洒水湿润后，续继回填，以保证上、下层接合良好。
(7) 人力大面积夯实填土时，夯前应初步平整，夯实时要按照一定方向进行，一夯压半夯，夯夯相接，行行相连，每遍纵横交叉，分层夯打。
填土区如有表面滞水时，应在四周设排水沟和集水井将水位降低。已填好的土如遭受水泡应把上层稀泥铲除后，再进行下道工序。填方区应碾压成
Course Technology Details earth elements:
(1) filling construction should start at the lowest site, the level of stratified films rolled or compacted backfill. Must be sub-filling, the joints shall be maintained on each slope shape (inclination should be greater than 1:1.5) grind track overlap 0.5m ~ 1.0m, on the distance of the gap should not be less than the lower fault 1m.
(2) To ensure the uniformity of fill compaction and density, to avoid sinking roller, rolling machine rolling in heavy before you use the light compaction machinery (such as bulldozers, cars) to promote peace, at low speed and pressure of 4 ~ 5 times the surface plain.
(3) compacted fill compaction, should control the speed, beyond a certain limit, compaction decreased significantly. Should generally not exceed the following: level grinding, vibratory roller 2km / h, sheep foot grind 3 km / h.
(4) Mechanical fill should be compacted to ensure the quality of the edge parts.
(5) to conduct a large area with roller compacted fill, the pressure gradually to the middle from both sides of each track should be rolled round 15 ~ 20cm of the overlap of pressure to avoid leakage, subsidence of the wheel to the general pressure not more than 1 ~ 2cm for the degree. Rolled less than the Department, the application Human ramming or tamping machine with small compacted.
(6) After a layer of flat rolled grinding, application of artificial machines (bulldozers) will surface scuffing. Soil surface is too dry, watering should be moist, the continued following the backfill to ensure that, the lower bonding well.
(7) Human compacted fill a large area when the initial level before compaction, when compacted in accordance with a certain direction, a semi-compaction ram, ram ram phase, trekking connected to each over the vertical and horizontal cross stratification and pounding.
Filling areas where the surface of stagnant water should be set up around the drain, and set in the wells will reduce the water level. If the soil has been filled blisters on the upper mud should be eradicated, and then processes the next. Fill area should be rolled into