二、施工測量方案.doc
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二、工程概況
北京××科研實驗大樓工程位于北京市××區××路××號，地處三環以外。建筑場地面積1761m2首層面積1809m2，總建筑面積29052m2，分主樓和裙房(裙房主要為地下環形車道)，主樓地下二層，地上十六層，結構形式為全現澆框架一簡體結構。建筑物檐高59.65m，總高度為65.40m；室內外高差450mm，±0.000相當于絕對標高51.70m。
主樓：基礎為平板筏基，埋深-10.75m，C15砼墊層100mm厚，底板1500mm厚。一層、二層、三層外軸線尺寸為41.16×43.96m，四至十六層外軸線尺寸為41.16×35.90m，內設四部電梯，兩座樓梯。
裙房即地下環形車道，為旋轉式坡道分上下層，共兩座，坡度為I=9.12％，旋轉外墻外半徑10.46m，內墻內半徑為5.74m，底板厚250mm，頂板厚250mm，墻厚260mm，出口設防倒塌棚架。
2．控制點的布置及施測
2.1 從場地的實際情況看，場地四周離建筑物在10m以上，故對布設控制點無影響。由于汽車坡道后期施工(待主體結構完工后)、南側場地做臨設及材料堆放用，所以南北向控制點集中布設在北側原有混凝土地面上，南側只布設遠向復核控制點，施工場地不受影響，東西向控制點布設在西側，東側設復核控點。
2.2 布設的控制點均引向四周永久建筑物或馬路上，且要求通視，采用正倒鏡分中法投測軸線時或后視時均在觀測范圍之內。
2.3 根據甲方要求和測繪院提供的紅線點形成四邊形進行控制。
2.4 根據施工組織設計，對樓層進行網狀控制，兼顧±0.000以上施工，設置控制軸線1、6軸，B(A軸用于地下)、F軸(G軸用于地下)及北側汽車坡道過圓心的南北向、東西向為控制軸。
2.5 根據測繪院提供的BM1、BM2(西側)及BM3(北側)三點高程控制點數據(具體數據詳見測繪成果資料)向建筑物四周引測固定高程控制
Second, project profiles
Beijing × × research laboratory building project in the District, Beijing × × × × × × Road No., located outside the Third Ring Road. The first floor area of 1761m2 building site area 1809m2, total construction area of 29052m2, sub-main and skirt (skirt mainly underground ring Drive), Main Building, basement level, ground 16 floor, place the framework for the whole structure of a simplified structure. Building eaves, high-59.65m, total height of 65.40m; indoor and outdoor elevation 450mm, ± 0.000 is equivalent to the absolute elevation of 51.70m.
Main: Foundation for the raft slab foundation, depth-10.75m, C15 concrete 100mm thick cushion, floor 1500mm thick. Layer, two-story, three-axis dimensions of outer 41.16 × 43.96m, 4-16 axis of the outer dimensions of 41.16 × 35.90m, equipped with four elevators, two staircases.
Skirt that is underground ring road, as the rotating points on the lower ramp, a total of two, a gradient of I = 9.12%, external rotation radius of 10.46m, within a radius of inner wall 5.74m, floor thickness 250mm, 250mm thick roof , thick and 260mm, exports collapsed scaffolding fortification.
2. Arrangement of control points and Measurement
2.1 from the site of the actual situation, around the field more than 10m away from the buildings, it had no effect on the control points laid. Since the late car ramp construction (to be completed the main structure), the south side of site design and materials to do the Pro stacking, and therefore the concentration of control points from north to south in the north of the existing concrete floor laid on the far south only to review the control points laid , construction site will not be affected, what the control points laid on the west side, east side of control points based review.
2.2 layout of control points to lead all around the permanent buildings or roads, and communications, as required, by being cast down Mirror French axis measured as the time during or after the observations were within the scope.
2.3 Institute of Surveying and Mapping under the Party requirements and provide the red line points to control the formation of quadrilateral.
2.4 According to construction design, network control on the floor for consideration to ± 0.000 over the construction, set the control axis of 1,6-axis, B (A-axis for the underground), F-axis (G-axis for the ground) and the north slope car Road through center of a circle of north-south and east-west axis for the control.
2.5 According to the Survey and Mapping Institute provided BM1, BM2 (west) and BM3 (north) three vertical control point data (see mapping data, the results of specific information) fixed to the building height control around the quoted measurement