喷泉设备回水槽施工方法

1、核对性水准点,布设暂时水准点，核对高程。

2、测设喷泉设备水槽中间桩,管线原地上高程,,施放挖槽边线,堆土,堆料间隔及暂时用地方案。

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3、槽开挖时严肃控制槽底高程决不超挖,槽底高程能够比描绘高程跋涉10cm,做予留有些,完毕用人工清挖,以防槽底被扰动而影响工程质量。槽内挖出的土方,堆放在距沟槽边缘1.0米以外,土质松软危险地段选用用支撑方法以防沟槽塌方。

4、槽底素土夯实，槽四边围运用MU5.0毛石M5水泥沙浆砌筑：

a原资料的选用：为了降低水化热，选用32.5级矿渣水泥;思索混凝土可泵性，降低缩短，保证强度，跋涉混凝土的耐久性和抗裂性，选用5-31.5mm的连续径粒碎石;为了抵达混凝土搅拌物28.5度的出灌温度，选用深井地下水搅拌;在混凝土中掺和UEA膨胀剂和超缓型高效泵送剂，抵偿混凝土的缩短，推延水化物的开释，减少底板的温度应力，跋涉可泵性;在混凝土中掺入Ц级粉煤灰。

b喷泉设备浇筑方法：央求一次性浇筑完毕，不留施工缝，加强池底及池壁的防渗水才调。混凝土浇筑选用从底到上“斜面分层、故步自封、薄层浇筑、天然活动、连续施工、一次到顶”的浇筑方法。

c振捣：应严肃控制振捣时辰、振捣点间隔和刺进深度，避免各浇筑带交接处的漏振。跋涉混凝土与钢筋的握裹力，增大密实度。

d喷泉设备表面及泌水处置：浇筑成型后的混凝土表面水泥砂浆较厚，应安描绘标高用刮尺刮平，赶开表面泌水，初凝前，重复碾压，用木抹子搓压表面2-3遍，以逼和收水裂缝。

e喷泉设备混凝土保护：因工程施工，正值秋季，正午、夜晚温差较大，为保证混凝土施工质量，控制温度裂缝的发作，选用蓄水保护。蓄水前，选用先盖一层塑料薄膜，一层草袋，进行保湿暂时保护。

5、溢水、进水管线的设备参照描绘图纸。

6、喷泉设备管线施工完毕，设备水箅子盖板：

a涌泉的水箅子盖板资料为不锈钢。规范为600*600，四角固定运用108*4，25高的不锈钢圈，四边是30*30*3的不锈钢，对角直线为38*25*1.5的不锈钢方管，四边分区的横栏选用25*25*1.0的不锈钢方管。

b回水槽的水箅子宽为600，长度现场判定，四边选用30*30*3的不锈钢管焊接，中间选用25*25*1.0的横栏焊接

Fountain equipment back water tank construction method

1. Check permanent leveling point, lay temporary leveling point and check elevation.

2. Measure and set the middle pile of fountain equipment flume, raise the pipeline in situ, discharge the side line of excavation groove, heap soil, heap material interval and temporary land use plan.

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3. During the excavation of the groove, the height of the groove bottom shall be strictly controlled and never overdug. The height of the groove bottom can be trekked 10cm higher than the depicted height, leaving some to be left. The earthwork dug out in the trench is stacked 1.0 meters away from the edge of the trench, and the support method is adopted in the dangerous area of soft soil to prevent the collapse of the trench.

4. Plain earth at the bottom of the tank is rammed, and MU5.0 rubble M5 cement mortar masonry is used to surround the four sides of the tank:

A. Selection of original data: in order to reduce hydration heat, grade 32.5 slag cement is selected; Considering the pumping ability of concrete, reducing the shortening, ensuring the strength, durability and crack resistance of trudging concrete, 5-31.5mm continuous diameter gravel is selected. In order to reach the concrete mixing temperature of 28.5 degrees, deep well groundwater mixing is selected. The concrete is mixed with UEA expansion agent and superslow efficient pumping agent to offset the shortening of the concrete, delay the release of hydrates, reduce the temperature stress of the bottom plate, and make it pump. Incorporating Ц grade fly ash in concrete.

B fountain equipment pouring method: begged the one-time pouring finished, do not leave construction joints, strengthen the bottom and wall of the pool seepage prevention water adjustment. Concrete is poured from bottom to top by "inclined plane layering, self-sealing, thin layer pouring, natural activities, continuous construction, one time to the top" method.

C vibration: vibration time, vibration point interval and penetration depth should be strictly controlled to avoid leakage vibration at the junction of each casting belt. Trek concrete and steel grip force, increase compactness.

D fountain equipment surface and bleeding treatment: the cement mortar on the concrete surface after pouring and molding is thick, the elevation should be scraped flat with a scraper to drive away the surface bleeding. Before initial setting, the surface should be repeatedly rolled and pressed with wooden trowel for 2-3 times to squeeze and collect water cracks.

E fountain equipment concrete protection: because of engineering construction, it is autumn, the temperature difference between noon and night is large, in order to ensure the quality of concrete construction, control the onset of temperature cracks, choose water storage protection. Before water storage, choose to cover a layer of plastic film, a layer of straw bag, for temporary protection of moisture.

5. Refer to the drawing for equipment of overflow and inlet pipelines.

6. After the completion of the fountain equipment pipeline construction, the water grate cover plate of the equipment:

A. The information of the inwelling water grate cover plate is stainless steel. Specification is 600*600, four corners fixed use of 108* 4,25 high stainless steel ring, the four sides are 30*30*3 stainless steel, diagonal line is 38*25*1.5 stainless steel square tube, the four side partition of the bar selection of 25*25*1.0 stainless steel square tube.

B the water grate of the water back sink has a width of 600, and its length is determined on site. The stainless steel tubes of 30*30*3 are used for welding on the four sides, and the bars of 25*25*1.0 are used for welding in the middle