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following advantages: can be obtained from the raw material, relatively low cost, good engineering using performance and has good patibility with environment, this makes the cement in the current construction plays an important to concrete, it is already the world39。s dosage the biggest, the most widely used in civil engineering materials, concrete has the following categories: cement concrete and special concrete and reinforced concrete, has many advantages, and its abundant raw materials, low cost, simple production process, high pressive strength, good durability, high performance concrete, fiber concrete is a bit more prominent, it has the ultra high strength, low permeability, good structural performance, superior durability, significant economic effect, environmental protection, and many other also launched the concept of a green material, it also should be the people demand for high quality of life.土木工程是一個多種工程的結合體,有其基礎的工程,那么土木工程都有哪些基礎工程呢?就我所了解到的有巖土工程勘察、淺基礎、深基礎、不均勻沉降、地基處理。巖土工程勘察主要包括工程地質測繪、巖土工程勘探方法、原位測試,巖土工程勘探是為了進一步查明地表以下工程地質問題,取得深部地質資料,勘探的主要方法有:鉆探、井探、槽探、洞探和地球物理勘探,而且鉆探運用最為廣泛。工程地質測繪的目的是為了查明場地及其鄰近地段的地貌、地質條件。主要的方法有像片成成圖法和實地測繪法,現(xiàn)在遙感技術已在工程地質測繪中得到了廣泛的運用。原位測試是在巖土原來所處的位置或基本上在原位狀態(tài)和應力條件下對巖土性質進行測試。主要運用的方法有:載荷試驗、靜力觸探試驗、旁壓試驗、十字板剪切試驗、標準貫入試驗及其他的現(xiàn)場試驗。旁壓試驗適用于粘性土、粉土、砂土、碎石土、軟巖等;靜力觸探試驗適用于軟土、一般粘性土和含少量碎石的土。淺基礎的結構形式有獨立基礎、條形基礎、筏板基礎和箱形基礎。深基礎就是指位于地基深處承載力較高的土層上,埋置于深度大于5m或大于基礎寬度的基礎,比如樁基、地下連續(xù)墻、墩基和沉井等。在這里我想要說一下沉井基礎的特點,埋置深度可以很大、整體性強、穩(wěn)定性好、能承受較大的垂直載荷和水平載荷,但也有其缺點,就是施工期較長,受影響較大。對于不均勻沉降我想主要談一下它的處理辦法,在工程實踐中,減小地基差異沉降主要用這幾個方法:①在設計時盡量是上部荷載中心受壓,均勻分布。②遇到高低相差懸殊或地基軟硬突變時,要合理設置沉降縫。③增加上部結構對地基不均勻的協(xié)調作用。④合理安排施工工序和采用合理的施工方法。著名的意大利比薩斜塔就有過糾偏工程,使其成為世界建筑的一特色。Civil engineering is the bination of a variety of engineering, has its foundation engineering, so what are the basic engineering civil engineering?As far as I know there are geotechnical engineering investigation, shallow foundation and deep foundation, uneven settlement and foundation engineering mainly include engineering geological surveying and mapping, the geotechnical engineering exploration method, in situ test, is to determine the geotechnical engineering exploration engineering geological problems, below the surface in deep geological data, the exploration of the main methods are: drilling, well test, trenching, hole and geophysical prospecting, drilling and most widely geological surveying and mapping of the purpose is to find out the site and its adjacent area landfor