土方回填壓實技術交底.doc

土方班技術交底內容：
(1) 填方施工應從場地最低處開始，水平分層整片回填碾壓或夯實。必須分段填筑時，每層接縫處應作成斜坡形（傾斜度應大于1：1.5）碾跡重迭0.5m~1.0m，上、下層錯縫距離不應小于1m。
(2) 為保證填土壓實的均勻性及密實度，避免滾子下陷，在重型碾壓機碾壓之前，應先用輕型壓實機械（如推土機、汽車）推平，低速行駛壓4~5遍，使表面平實。
(3) 碾壓機械壓實填方時，應控制行駛速度，超過一定限度，壓實顯著下降。一般不應超過下列規定：平碾、振動碾2km/h，羊足碾3 km/h。
(4) 機械填方時，應保證邊緣部位的壓實質量。
(5) 用壓路機進行大面積填方碾壓時，應從兩側逐漸壓向中間，每次碾壓輪跡應有15~20cm的重迭度，避免漏壓，輪子的下沉量一般壓至不超過1~2cm為度。碾壓不到之處，應用人力夯或小型夯實機械配合夯實。
(6) 平碾碾壓一層完后，應用人工機械（推土機）將表層拉毛。土層表面太干時，應灑水濕潤后，續繼回填，以保證上、下層接合良好。
(7) 人力大面積夯實填土時，夯前應初步平整，夯實時要按照一定方向進行，一夯壓半夯，夯夯相接，行行相連，每遍縱橫交叉，分層夯打。
填土區如有表面滯水時，應在四周設排水溝和集水井將水位降低。已填好的土如遭受水泡應把上層稀泥鏟除后，再進行下道工序。填方區應碾壓成
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
 

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