Jet Grouting in the low copper SISG broken Founda

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Jet Grouting in the low copper SISG broken Foundation Engineering

Very little, even if the cement content is not high, and large gravel content, compressive strength is still high. Most of jet dynamic test checks the upper body of cement or cement less uneven, but generally the mechanical strength test than the pile, the lower much higher bearing capacity is not affected. From the test results shows that under the section of pile compression and shearing strength, although lower than the upper pile, but the pile, the pile diameter lower than the effective section of the pile diameter on the pile, bearing capacity remains unaffected. Check on the permeability of the pile, a total of 3 piles of rocks selected Cang check the permeability coefficient of drilling. The results in Table 5 demonstrate the results show that the jet concretion body impermeable, impermeable excellent performance. Prove the integrity and density of the pile is very good. Conclusion I, the rotating pile with the construction of convenient, safe, fast, investment, quality and reliable, especially compared with the artificial drilled piles, retaining walls to avoid the hole, pile hole ventilation, drainage, soil with to a series of insecurity, which was widely welcomed. If an institute designed to Shaoguan Steel slag plant, the original design for the 1.2m number of drilled pile 28, is expected to be completed within 6 months. Since we can not meet the schedule requirements and to ensure construction safety, will change it to 500ram, 1I2 a number of the rotating pile, only to spend 35 days on the construction is completed, fast and good, but also greatly reduces the cost of the project. 2, the dynamic test test table, the compressive strength of the jet maximum consolidation 15.68MPa, the lowest 12.6MF 'a, the average 14.21V ~' a physical and mechanical tests, the maximum value of compressive strength 31.71V ~ 'a, the minimum value of 9.1 plus Pa, 1992 s 0 MINE DESIGN and build Ya 39 Table 5 water injection test calculations B2 - 3B14-316 - 3 formula Stake d0. 09600060.096x = {Mountain Q0.16130.02690.0254K a legacy of the Department of vaccine deposition (m / d) L14.9 ● 7.4g. 9Q-_ leisure water (t / d) h14.97.49.9L length of a pilot counties (m) K0.00074270.00044750.00002490h head bearing a note bearing the high (m) d a bored hole light (Ⅱ 1) the average To 15.98MPa, are more than the design value, the result is similar. Dynamic test methods proved reliable. 3, on the pile capacity. By considering the safe side piles, friction piles according to the more in line with the situation, and its friction pile capacity can be greatly improved. Because Jet Jet Grouting in the process, through not the same as soft soil layer, spin will not be emitted to the diameter as large. Which is not an ordinary pile and pile soil friction relationship, but each embedded itself (Figure 2), will significantly improve the rotating pile bearing capacity. Circle 2 circle rotating pile section to indicate the body ① Jet consolidation @ @ jagged hole wall of pile 4, on the application of jet grouting pile geological conditions, engineering practice shows that it applies to sand type of soil (silt, fine sand , coarse sand and gravel), clay (clay, sandy clay, silt), loess (loess type soil, loess), miscellaneous fill and rock crushing rock band, etc., can be high-pressure jet. Almost every need to strengthen the bearing capacity of foundation piling Piles can be used. Particular case of silt, sand, high water table, depth stratum, resulting in construction difficulties. Can not ensure the progress of construction safety and engineering. Using jet grouting pile, the more its advantages. Only when the water flow is too large, filling karst per lot. Permafrost and severe corrosion on the cement foundation. Not suitable for jet grouting. 5, Jet Grouting characteristics of the process, the amount of slurry discharged from the orifice more stacking space require specialized and timely clean-up. 6, for rotating pile, the current applied to withstand the vertical force is based. For the role of the larger horizontal force needed reinforcement of the pile, in the construction process to the next cage, yet to be explored through the construction practice. At present, China's largest single-tube rotating pile has reached 45m deep, and its construction techniques and operating techniques, have improved a lot and improve. However, Jet Grouting in design, calculation, construction, testing, the state Shangyuan Ming correct specification requires constant practice, based on a set of more comprehensive laws, in order to make rotating pile to achieve the above-mentioned aspects standardized. A rotating pile as a promising technology, through constant application and will be further development and improvement. Fourth National Academic Conference newsletter mining the fourth national mining large homes from the academic Department of Chemical Engineering Chemical Design of mine knows the main boat. According to din 1993, the General Assembly is scheduled to held in Nanjing, 4.5 months oyster and representatives of 400 ~ 450 homes. Unprecedented. A good start for the ring Po This conference organizers wish review is in preparation. (File)
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