Pile Construction Quality Control
Insufficient, resulting in excessive use of cement, so that by the amount of cement out of the concrete translation of the amount of earthwork is imaginary, if not based on analysis of geological conditions indigo produced a large filling factor, it is necessary to check on management, in order to make the quality of the pile correct valuation. A steel cage hanging steel cage in the pile should also strictly enforce the rules, place the protective layer of the pad to prevent the exposed tendons. (B) hand-dug piles of quality control hand-dug piles with rock seen, the construction of simple equipment, high capacity, fast progress, good economic benefits in recent years with high-rise building processes, and bridge engineering strong construction. Large diameter piles have been widely used. Especially in the geological situation is better, such as clay, artificial fill, silt-free mobility, more than in dense sand, and the stratum depth than is generally no more than 3.0m, the larger pile capacity projects, giving priority to use the hand-dug piles. Hand-dug piles common quality accident as follows: 1, flood sand, mud floods, water logging (1) causes the layer of liquid mud or high water table to dig holes in the sand,
Salvatore Ferragamo outlet, if measures to spin properly. Mud floods occur, spring floods and sand now, so dip workers blocked. Even the scrap pile hole or personnel safety incidents occur. (2) preventive measures ① in the flow of silt and sand layers, Manhole Wall height should be reduced when (80-50cm), and it shall dig, that experience, that is filling ② According to the geological and hydrological reports from the careful consideration of precipitation measures should ensure to the impermeable layer of precipitation, precipitation in addition to treatment should be considered to ensure that the role of outside layer of the treatment. Should also not make the surrounding buildings subsidence. '} 1995.3 Huang Renqiang down Shaanxi Construction Health ----- one (foreign Xi'an to build two engineering companies) Power Summary: bridge is the production of calcium carbide plant Xi'an of I bonds minute fly I process. Difficulty lifting bridge which 四号 too. Lifting the use of cut off the bridge, sub-lifting, air spliced and other methods to be successful. Key words: lamellar tearing prefabricated steel cap supine Xi'an Chemical Engineering from the new bridge composed of five simply supported truss. One fourth bridge 18 meters long, single-Pin weight 13.2 tons, lifting height of 29 meters. Line Bridge has become all the construction side, over there by the original bridge, under the power distribution room (Figure 1). Construction site and the space is small, lifting hard ③ If you already have flood mud, sand serious floods occur,
Beats By Dre Headphones, and sometimes difficult to remedy, should the sand backfill. Then take measures. ④ through the shallow mud flow method can be prefabricated caisson sinking. ⑤ qualified engineering steel casing can be used, through the flow of sand or silt layer instead of Manhole Wall. 2, the hole into the rock pile depth of the problem: When there interbedded stratum of time, especially in hard rock is not laminated thickness, each layer of the multilayer case. Stratum in order to prevent the occurrence of punching damage is too book, often increasing depth into the rock, to bring some anonymous works hard. Interchange construction of pile foundation such as Datong, appeared soft and hard rock sandwich, in specific processing. Give full consideration to the bottom of the pile embedded in the bedrock embedded fixed force, have been adequately addressed. So say, when the bottom of the pile embedded in rock a certain depth. The embedded with the force can not be ignored, if the bedrock of the mounted force calculation in, you can determine a more reasonable depth into the rock, do not consider the stratum punching the storm damage done is too long leaving the pile increases. I 0tlq, i Cointreau great. Additionally, the construction site has been suspended one tQJ6o/8o with the construction of a tower crane, lifting weights are due to not enough, not lifting a single Pin. Consider leasing 40 tons or 50 tons truck crane,
MBTシューズ 販売店, lifting height too but still can not solve the problem (4o tons truck crane lifting height of 29 m single, only hanging 10 tons). Limited because of field conditions. Can not make the bridge in place in advance, they can not dual-lift crane, how safe lifting shelf is a very difficult problem to be solved. After research and analysis, decision to use precast segments,
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herve leger sale, the pile of concrete pile quality dug dug the body strength of concrete pile bearing capacity is an important control factor. Pile of concrete quality problems should pay attention to. (1) causes ① infusion of concrete, does not abide by the rules, but condescending will not string tube of concrete in the hole directly down, thus causing the separation of mortar and aggregate. ② pouring concrete without vibration or vibration is not required to make the concrete is not dense, cellular, more than holes, less than the design strength. ③ bottom of the hole more water, or flood the hole with water phenomenon. In the absence of proper treatment of the case go straight down the hole aging concrete, so concrete in the cement was washed up. Caused by bad concrete cement. (2) preventive measures ① Pile acceptance, the infusion of concrete must use string tube, but also layered vibrating compaction. Prohibit the dumping of porous mouth. ② hole at the end of the water to be excluded, if a large amount of water seepage can not drain the right, underwater concrete application of perfusion catheter. 'Unitary construction} 1995.345 Shaanxi
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