三個橋梁工程施工方案范本.doc

二、橋梁工程施工
1、 任務劃分和施工力量布署
擬成立兩個橋涵連隊完成本段橋梁施工任務。橋涵一連承擔茂湛鐵路高架橋及該橋至K315+500內的橋涵的施工任務，橋涵二連負責其余路段的橋涵施工任務。 
施工力量布署詳見《投入本工程的人員數量表》和《擬投入工程的施工機械設備表》
2、 鉆孔灌注樁施工要點
本標段鉆孔樁共有     延米，樁徑有1.2m、1.6m兩 種類型，采用循環鉆機施工。鉆孔、成樁施工方法和注意事項：
（1） 鉆孔
固定好鉆機，并檢查鉆機水平且鉆頭位置準確無誤后，即可開始鉆孔，在鉆孔過程中要保持孔內水頭高度及泥漿比重，隨時檢查孔的傾斜度，并及時糾正，施工中隨時觀察地質情況，當地質發生較大變化時，及時報告工程師，鉆孔成孔后上報工程師驗收并及時清孔。
（2） 安放鋼筋籠和導管
鋼筋籠在鋼筋操作間集中下料，現場分節制作，用吊車吊入孔中安放焊接，接頭采用搭接焊，注意鋼筋籠位置和籠頂高程。導管安放前要進行導管試驗，確保導管無漏水現象。
（3） 灌注砼
灌注前檢查泥漿比重、孔深、沉淀均應符合要求后才灌注砼，砼由強制式拌合機拌和，小翻斗車運輸，吊車配吊斗進行灌注。隨時檢查砼的均勻性、塌落度和導管埋置深度。
3、 墩臺身、蓋梁（臺帽）等下部構造砼的施工要點
（1） 墩臺身施工
2, bridge construction
1, the task force deployment and construction division
Bridge to be set up two companies to complete the task in this section of bridge construction. Mao-Zhanjiang railway bridge take the viaduct series and the K315 +500 Bridge to the bridge's construction tasks, responsible for the remaining sections of bridge and culvert bridge Erlian construction tasks.
Construction of power deployment see "into the project the number of personnel" and the "to be put into the project construction machinery and equipment list"
2 points of bored pile construction
The total linear meters Lot bored pile, pile diameter are 1.2m, 1.6m are two types of cyclic Rig. Drilling, pile construction method and precautions:
(1) Drilling
Fixed the rig, and check the drill bit location and the level of accuracy, you can start drilling, the drill hole of the process to maintain the proportion of head height and mud, at any time check the hole inclination, and promptly correct any construction observed geological conditions, when significant changes occur when the geological, timely reporting engineer, drilling engineer to report upon acceptance into the hole and timely clean hole.
(2) reinforcement cage and the catheter placed
Operation between the steel reinforcement cage centralized material, on-site production of sub-section, a crane into the Kongzhong An up welding, the joint use of lap welding, note the location and cage steel cage top elevation. Catheters were placed catheter before testing to ensure no leaking pipe.
(3) perfusion Concrete
Checked before perfusion mud weight, hole depth, precipitation should meet the requirements after the infusion of concrete, concrete mixing machine from the compulsory mixing, transport of small dump trucks, cranes were perfusion with skip. Always check the uniformity of concrete, slump and catheter embedded depth.
3, pier and abutment, cover Liang (Taiwan, cap) and so the lower part of the construction of structural concrete elements
(1) pier and abutment construction

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