1、中油吉林化建工程股份有限公司CHINA PETROLEUM JILIN CHEMICAL ENGINEERING ensure construction conform to the national relevant checking and acceptance standards, the contractor and owner project documents and HSE requirement.2适用范围scope适用于由中油化建承建的南海 LDPE 项目泵送混凝土工程的施工。All the LDPE project of pipe rack foundation concr
2、ete construction contracted by JCC are applied.3编制依据basis of compilationWR-8310-7000-0201 CIVIL WORKS REQUISITION FOR PP-HDPE PLANTTM930.2/03 CIVIL WORKS CHARGES AND LIABILITYSP-8310-0000-0008 REINFORCED CONCRETECONSTRUCTION SPECIFICATIONSP-8310-7000-0002 CONSTRUCTION SPECIFICATION FOR CONCRETE WORK
3、GB 50300-2001 建筑工程质量验收统一标准 UNIFIED QUALITY STANDARD FOR CIVIL ENGINEERING CONSTRUCTION ACCEPTANCEGBJ-50204-2002 混凝土工程施工及验收规范中油吉林化建工程股份有限公司CHINA PETROLEUM JILIN CHEMICAL ENGINEERING整个输送过程中拌筒的总转数应控制在 300 转以内。The agitating rotary speed is 24r/min when the concrete agitating trucks convey the concrete.
4、The total turns of the mixing drum should be less than 300 turns during the transportation process.4.3.4 砼搅拌输送车因途中失水，到工地需加水调整混凝土的坍落度时，则搅筒应以 618r/min 的搅拌速度搅拌，并另外再转动至少 30 转。If the concrete is dry during the transportation and need to inject water to adjust the slump, the mixing drum should rotate at a
5、 speed of 618r/min and the turns can not be less than 30.4.3.5 砼垂直运输采用砼泵车运送。The concrete vertical conveyance uses the pump trucks.4.3.6 混凝土输送管，要求不得直接支撑在钢筋、模板及预埋件上。The concrete conveying pipe can not be fixed directly with the steel bars, formworks and pre-buried components.4.3.7 混凝土泵启动后，先泵送适量水湿润和检查。
6、再用与混凝土相同配合比的水泥砂浆或纯水泥浆或 1：2 水泥砂浆润滑。润滑用的水泥浆或水泥砂浆应分散布料，不得集中浇筑同一处。Pump a suitable quantity of water to wet and check the concrete pump when it starts up. And then lubricate the pump with and-cement slurry at the same fixing rate or cement slurry or 1:2 cement slurry. The lubricating cement slurry or san
7、d-cement slurry should be placed separately and can not be placed at the same position.4.3.8 开始泵送时，混凝土泵应处于慢速，匀速并随时可能反泵的状态。泵送速中油吉林化建工程股份有限公司CHINA PETROLEUM JILIN CHEMICAL ENGINEERING&CONSTRUCTION CO.LTD.7-11度先慢后快、逐步加速。同时观察混凝土泵的压力及各系统的情况，待系统运转顺利后，再按正常速度进行泵送。The concrete pump should run slowly, run sta
8、bly and pump-back at any moment when starts the pump. The pump accelerates step by step. Observe the pump pressure and its systems, and pumps the concrete at normal speed after the pump runs smoothly.4.4 砼浇捣 Concrete placement and vibration4.4.1 布料 Materials layout4.4.1.1 混凝土浇筑分层厚度，一般为 300500mm。当水平结
9、构的混凝土浇筑厚度超过 500mm，可按 1：61：10 坡度分层浇筑，且上层混凝土应超前覆盖下层混凝土 500mm 以上。The thickness of the concrete placement in layers is 300500mm. When the concrete placement thickness of level structure exceed 500mm, it should be placed in layers with the slope of 1：61 ：10 and the upper layer of the concrete should cove
10、r the under layer exceeding 500mm.4.4.1.2 采用混凝土泵在浇筑竖向结构混凝土时，布料设备的出口离模板内侧面不应小于 50mm，并且不向模板内侧面直冲布料，也不得直冲钢筋骨架。When place the concrete of vertical structure by a concrete pump, the equipment outlet should be at least 50mm away from the medial surface of the formworks and can not spray the concrete direc
11、tly to the medial surface of the formworks and the steel bar frames.4.4.1.3 浇筑水平结构混凝土时，不得在同一处连续布料，应在 23 米范围内水平移动布料，且垂直于模板。Concrete placement activities can not be carried out continuously at the same position but place concrete movably in the same level surface in the scope of 23m and is vertical to
12、 the formworks.4.4.1.4 当采用混凝土输送管输送混凝土时，应由远及近浇筑。在同一区域的混凝土，应按先竖向结构后水平结构的顺序，分层连续浇筑。When convey the concrete by a pipe, the concrete should be placed from the far end to the near end. To the concrete in the same area, it should be placed continuously in 中油吉林化建工程股份有限公司CHINA PETROLEUM JILIN CHEMICAL ENGIN
13、EERING&CONSTRUCTION CO.LTD.8-11layers by the order of vertical structure prior to level structure.4.4.1.5 当不允许留施工缝时，区域之间、上下层之间的混凝土浇筑间歇时间，不得超过混凝土初凝时间。当下层混凝土初凝后，浇筑上层混凝土时，应按留施工缝处理。When construction joint can not be permitted, intermittent time of the concrete placement between the areas and layers can
14、not exceed the concrete initial setting time. When place the upper layer concrete after the under layer initial set, treat the activity as construction joint.4.4.1.6 预埋件、预留孔和钢筋密集的部位，应预先制定相应的技术措施，确保顺利布料和振捣密实。To the pre-buried components, pre-made holes and the steel bars dense position, measurements
15、must be made-out to ensure the concrete placement activities go on smoothly and the concrete can be vibrate densely.4.4.1.7 按照“混凝土浇注通知单”中要求的数量制作标准养护试块。The number of concrete samples in terms of casting checking advice will be made and cured under the same conditions with jobsite.4.4.2 浇捣 Concrete vi
16、bration4.4.2.1 采用振动棒振捣时，要做到快插慢拔，逐层振捣，每层浇筑厚度不超过500mm。在振捣过程中，宜将振动棒上下略为抽动，使上下振捣均匀。在振捣上层混凝土时，应插入下层中 5cm 左右，以消除两层之间的接缝，同时在振捣上层混凝土时，要在下层混凝土初凝之前进行。When carry out the concrete vibration activities by a vibrating rod, the rod should be inserted quickly and withdrew slowly and vibrate in layers and the thickn
17、ess of each layer can not exceed 500mm. Twitch the rod up and down slightly to make equality. When vibrate the upper layer of the concrete, the rod should be insert to the under layer 5cm to eliminate the gap between the two layers. The upper layer vibration should be carried out before the under la
18、yer initial set. 4.4.2.2 振动棒的插点要均匀排列，可采用行列式或交错式的次序移动。每次移动位置的距离应不大于振动棒作用半径（一般为 3040cm）的 1.5 倍。每一插中油吉林化建工程股份有限公司CHINA PETROLEUM JILIN CHEMICAL ENGINEERING&CONSTRUCTION CO.LTD.9-11点要掌握好振捣时间，过短不易捣实，过长可能引起混凝土离析。振捣时间以混凝土表面呈水平不再显著下沉，不再出现气泡，表面泛出灰浆为准。Arrange equally the inserting point of the vibrating rod a
19、nd move it row or interleaving. The distance of each movement should not more than 1.5 times of the rod active radius (3040cm). Take good control of the vibrating time because it is not dense if the times is too short and it will cause isolation if the time is too long. The time is acceptable when t
20、he concrete level does not sink notably and does not bubble and ash slurry occurs.4.4.2.3 振动棒不宜紧靠模板振动，且应尽量避免碰撞钢筋、地脚螺栓、预埋件等。在浇筑过程中随时检查模板、钢筋、预留洞、预埋件情况，发现有变形、位移时及时采取措施处理。混凝土浇筑完后，应立即再进行复核校正预埋地脚螺栓的轴线和标高。The vibrating rod can not lean against the formwork and avoid hitting the steel bars, anchor bolts and
21、 pre-buried components. During the concrete placement process, check the formworks, steel bars, pre-remain holes and pre-buried components at any moment and deal with any found deformations and displacement in time. Check and verify the axial lines and elevations of the pre-buried anchor bolts after
22、 the completion of the concrete placement.4.4.3 施工缝的处理 The treatment of construction joints4.4.3.1 柱子的施工缝留在梁的下面和板的顶面。承受动力作用的设备基础，不应留施工缝。The construction joints of supports and beams are remained under the beams and the top surface of the plates. The rotating equipment foundation can not be remained
23、construction joints.4.4.3.2 在施工缝处继续浇筑混凝土时，已浇筑混凝土应有足够的抗压强度。继续浇筑前，应清除垃圾、表面上松动的砂石和软弱混凝土层，同时还应凿毛表面，用水冲洗干净并充分湿润，但不得有积水。When continue to place concrete on the construction joints, the placed concrete should has enough compressive strength. Before placement, eliminate the rubbish, loose 中油吉林化建工程股份有限公司CHINA
24、 PETROLEUM JILIN CHEMICAL ENGINEERING&CONSTRUCTION CO.LTD.10-11sand-stone and soft concrete and chisel rough surface which should be clean and wet and free of standing water.4.4.3.3 在浇筑前，水平施工缝宜先铺上一层 1015mm 后配合比与混凝土内砂浆成分相同的水泥砂浆。浇筑时应避免直接靠近施工缝边下料。振捣时，宜向施工缝逐渐推进，并加强对施工缝接缝处的捣实工作，使其紧密结合。Before the concrete
25、 placement, pave a layer of sand-cement slurry 1015mm in thickness and its fixing rate is the same as the concrete on the construction joints. The concrete placement of the construction joints can not be stared from the connecting side. When vibration, approach the construction joints step by step a
26、nd enforce the vibration of the joints to make them dense.4.5 混凝土的养护：curing混凝土浇注完毕后 612 小时，即覆盖塑料布或麻袋、洒水进行养护。养护时间为 7 天。Curing of exposed concrete surfaces will be carried out after 612 hours finishing of pouring by the method of polyethylene film covering and water spraying. The period of curing is 7
27、 days.5特殊安全要求special safety requirements51 混凝土泵车应支设在平坦、坚实、交通畅通的场地内，支腿距离坑边应大于 2.5m，泵车经现场运转试验检查没有发现异常问题后方可使用。Area Civil Supervisor will check if the location for parking vehicles and placing equipment is flat and solid before contacting the Batch Plant. When the distance of placing position is more th
28、an 2.5m from the edge of foundation pit, check the pump equipment without abnormality and then can be used.52 设专人指挥泵车、罐车及混凝土的泵送。A specified person will conduct pumping truck, mixer and the carrier pipe.53 施工工人应轻扶泵管的头部，不准强力拉拽。The operation workers will support gently the egress of the pumping pipe, p
29、ulling and dragging the pipe with heavy force will be prohibited.中油吉林化建工程股份有限公司CHINA PETROLEUM JILIN CHEMICAL ENGINEERING&CONSTRUCTION CO.LTD.11-1154 泵管头部的前方不准站人，避免混凝土喷射伤人。In the front of the pumping pipe workers and labors staying is not allowed to ensure the hurt resulted from concrete discharged in a jet.55 非施工作业人员严禁在泵车旋转半径范围内停留。In on case will the unauthorized workers and personnel stay within the circumvolving radius of the pumping truck.
