 Wysłany: Pią 8:42, 07 Sty 2011 Temat postu: uggs Bolt Technology in Phoenix, the application o |
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| Bolt Technology in Phoenix, the application of diversion channels
Axial stress and strain distribution of the test bolt strain gauges are posted by the electron beam displacement sensor measured the displacement of reinforcement, you can measure the elastic elongation of the free phase reinforcement, anchoring segment slip between steel and mortar shift, and the reaction force to jack the compression displacement of rock mass. Figure 3 (b) see the anchor bolt into the paragraph after the stress decreases with depth suffered because of tension reinforcement to the mortar has been passed and the surrounding rock. Thus determined,uggs, when the anchorage length of the segment is less than 2.0m, the bolt ultimate tensile strength depends on the consolidation of reinforced cement mortar strength, when the anchorage length is greater than 2.0m, the rock bolt depends on the ultimate tensile strength The yield strength of steel, the design can yield strength steel bolt design as the ultimate strength. To this end, using the tensile yield strength of steel 55kN/era2 as smashing ∞ ∞ o ∞ design with the ultimate strength. 8 +320 to 8 +960 pullout section for the same, the basic conclusions are similar, will not go. 4 points in design and construction issues should be noted that a) To reduce the number of bolt holes and bolt construction making the workload, speed up the construction schedule,uggs bestellen, reduce costs, should be finishing high strength steel threaded bolt made in order to obtain more significant technical effect and economic benefits. b) Construction of Tension test shall be in the same geological conditions before the test venue, and step by step loading to failure, the aim is to determine whether the bolt design required to achieve the ultimate pullout force. c) for each construction site before construction of the pullout test to be done 2 to 3, to verify the estimate of the ultimate pullout force. If the construction of a long paragraph, or stratigraphic variation in the specific circumstances of the area should be decided according to the test site, the same conditions as test data available,uggs, may also be omitted not do it, but it should be noted that the ultimate pullout force is not with the diameter of the bolt body relationships. d) During the construction process to the surface of the construction work done bolt tension test, pullout test method and the same, but to achieve 1.0 to 1.2 D 0 (the design load), do so in order to obtain anchor deflection characteristics of data, and test results with the pullout contrast verification. The roots anchor the number of tension tests shall be bolt dynamic reports the total number of 3% to 5% but not less than three. e) obtained by tensile test the deformation characteristics (pull a deflection curve) is in accordance with the method of simple tension test all bolts without making tests to determine the safety of each bolt . Test may be 0.8 to 1.0 D () is tension force,ugg Günstig, a prescribed loading loading time, the amount of deflection and stretching roughly the same or smaller trials, that is considered qualified. 5 Summary reinforcement with bolt technology should be based on topographical, geological and construction conditions, choose the appropriate anchor form, according to local conditions, flexible application, so as to achieve better reinforcement effect and economic benefits. Reinforcement of diversion channels to Phoenix in late 2000 completion, has undergone a number of typhoons and storms in the test, quality, safety and reliability to ensure the normal power supply, substantial economic benefits, other related projects for the future provide a useful reference. One application of the vertical wall prestressed anchor bolt technology more flexible application of the fully realized. Praised by many experts, is worth promoting. 相关的主题文章： uggs nederland Medium-sized hydropower optimizatio uggs 19-25 June 1995 during heavy rainstorm at dia sdfsgfdsf Singeing fire a washing method of cold p |
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