template to model the way in the set, through inspection qualified rear can implement the whole project, and ensure the quality of the whole project in line with the requirements of process standards.6.2.2.5 concrete engineering quality assurance measures5-1 concrete strictly in accordance with the requirements of the concrete construction specifications; Once completed for continuous casting.5-2 before pouring, measures must be formulated strict pouring and pouring route, and detailed technical clarificaiton.5-3 concrete mixing of raw material must be strictly controlled, and control the temperature, and ensure the temperature loss in transit within the prescribed scope.5-4 before pouring into the mould temperature of concrete, concrete layer continuous casting, casting the strictly control layer, each layer height is not more than 40 cm, to avoid the time is too long to produce construction cold joint.5 - to control the generation of cracks and make full use of the later strength of concrete, reduce the dosage of cement in concrete, preventing the early cracking of concrete; In roof concrete used in construction, the second of plastering construction process of concrete early crack.5-6 contact the meteorological department in advance before concrete pouring, query, as far as possible to avoid cold weather pouring concrete, especially the rain and snow weather, in case of rain and snow is a moratorium on the casting, and to have completed the construction and implicit inspection qualified face in striped cloth covers, prevent the rain and snow into the structure template, affect the quality of concrete.5 to 7 after concrete pouring, the heat preservation, moisture curing of concrete, slow cooling, give full play to the creep of concrete, reduce the temperature stress.5-8 side walls should formulate detailed technical measures, to prevent the run mode.6.2.2.6 foundation drainage measures6.2.2.6.1 precipitation schemeBefore construction seriously understand understand precipitation scheme design, construction and design personnel at any time to keep in touch, timely supplement and modify the precipitation design, guarantee foundation drainage requirements.At the top of the pit around a drain on the ground and water retaining Nian, guide line of the ground water, ensure that water does not enter the pit pit.A detailed survey of underground pipeline, completes the pipeline protection, guarantee the construction is not caused by damage to water supply and drainage pipe base flooded.6.2.2.6.2 precipitation construction6.2.2.6.2.1 dewatering well construction6.2.2.6.2.1.1 construction processMeasurement positioning to artificial dig Wells, drilling emplacement and into the hole - in plasma and the well tube - fill filter material to wash well, embedding drainage under the contact line and power distribution cable and water pumps to cover cap, clean the construction site to management of precipitation, precipitation task to complete6.2.2.6.2.1.2 construction points6.2.2.6.2.1.2.1 sinkingAccording to the location of design, the use of pump suction reverse circulation drill suppling, caliper is not less than 705 mm, hole should maintain a round is vertical, the depth of not less than design value.6.2.2.6.2.1.2.2 in plasmaWell tube down into injection water before replacement, sand and gravel pump out sediment and well depth are measured.6.2.2.6.2.1.2.3 sling the well tubeWell pipe with cement and gravel filter tube, using the steam hanging section, each section length is 2. Om, put a layer of nylon net, outsourcing layup with nylon mesh wrapped tightly. Well tube above the ground is not less than 200 mm, and temporary protection.6.2.2.6.2.1.2.4 fill filter materialWell after a tube down into artificial fill in the filter material, filter material evenly around the hole fill in in succession. Filter material added to the wellhead under 1 meters, the clay on the joint. Filter material clean stone chips for 3 to 7 mm, impurity content is not more than 3%.6.2.2.6.2.1.2.5 wash wellPut sewage pump in the bottom smoke wash repeatedly, until the water deoxidization net. Wash well in suppling for 8 hours, ensure water penetration effect. Wash well in the process of water level and the change of the water yield.6.2.2.6.2.2 precipitation6.2.2.6.2.2.1 pump installationSubmersible pump with wire rope sling the.Installed and connected to the power supply, laying cable and switch box, single well control power supply, and installation of automatic time relay water pumping device and electric leakage protection system.6.2.2.6.2.2.2 pull downAccording to foundation pit excavation depth and observation Wells changes control dive down deep in stages. Started pumping, because of the large water yield, to prevent drainage pipe drainage ability is insufficient, can have interval by starting the pump.Pumping began, should examine of single well water and sand producti