基坑土钉支护技术浅析毕业论文外文翻译

基坑土钉支护技术浅析毕业论文外文翻译内容摘要：

nts, should adopt the Hor Hclass steel workers, reinforced after the purchase should be properly safeguarded to prevent corrosion, production should be transferred straight, rust, oil removal, should be carried out physical and mechanical properties or chemical position analysis of test welding of steel, should be weldability and welding quality of the test for detection of welding material strength should be greater than the overall strength。 Cement: ordinary portland cement used, label , if necessary, sulfuric acid resistant cement, alumina cement should not be used. Cement should ply with the provisions of the existing cement standard requirements, there must be a single factory test reports, quality inspection orders, factory card documents, in accordance with its varieties, label, test numbers etc., and inspection and acceptance sampling inspection, by the examination results are reasonableUse. Bags of cement should be properly kept in storage and transportation, rain, moisture, stacked in a certain height from the ground heap shelves, is strictly prohibited and damage throwing throwing bags, prohibited the use of damp or different varieties of mixed cement label. Aggregate: stone and sand material (seeds film, mediumfine sand) should check report cards, the stone test methods and quality standards by JGJ5392, sand material testing methods and quality standards by JGJ5292. Particle size of less than 2mm in the sand, sand, clay content by weight not more than 3%, the particle size of less than 12mm gravel or melon tablets, clay content by weight not more than 3%. Mixing of water: the water without affecting the normal condensation of cement hardening of harmful impurities, may not contain fat, sugar and free acid, etc.。 water, PH value is less than four of acidic water and sulfur ion of more than 1% of the water weight of water were shall not be used。 the use of tap water or clean water for mixing natural water could be dispensed with for testing. Quicksetting agent: quicksetting agent is used in J85, 711, or Red Star 1, should be specifically responsible for control, add the weight of 3% of the weight of cement, the machine automatically added by the jet. Electrodes: The THJ422. Concrete mix: In addition to spraying the concrete mix design standards to be attained strength, we must also meet the technical requirements of construction, with the ratio of 1::2:2 (cement: water: sand: melon pieces), melon seeds piece maximum diameter of not more than 12mm. Grouting mixture ratio: onegrouting with cement mortar 1:1, the second grouting using watercement ratio of water slurry, cement mortar and cement slurry must be stirred evenly pure, a mixing of the slurry must be initial setting before ( generally 2h) run out. Early strength and waterreducing agent: According to the nature of projects, using different types of early strength agent, monly used red star on the 4th, 3F, NC, NNOF, NS21 and so on. Net production of soil nailing and reinforced Size allowable deviation of soil nail making: the length of ??100mm, curved reposted elsewhere in the paper for free download Drainage System Soil Nailing appropriate to remove ground water under the conditions of construction, the drainage should take appropriate measures, including surface drainage, internal drainage, as well as supporting the drainage pit in order to avoid saturation of the soil and reduce the role of the hydrostatic layer on the surface pressure. Excavation around the bracing should be added within the surface finishing, and building drains and cement mortar or concrete surface to the underground water surface infiltration of precipitation. Pit top of the hill near the 24m wide and the ground should be properly boosted, and the inside of high external low, easy to runoff away from the slope. In supporting the back surfac。