外文翻譯---軟土質(zhì)條件下管樁施工的技術(shù)措施-全文預(yù)覽
【正文】 between piles, but also with the pile length, pile, piling rate and more related to the piling sequence. 3) Taking into account the pipe construction squeezing effect generated by the situation on the impact of large earth excavation, in order to make precontrol, to make a few suggestions on technical measures pipe construction: (1) Pile weight bearing capacity of soft soil with the site to ZYJ500 as an example of 10 hydraulic static pile driver, pile driver weight 506T, plane size 12m , the average pressure of about 5T/m2. Surface or near the surface, such as physical and mechanical properties of soil is poor, when the pile driver is easy walking and injections of settlement, is not conducive to construction, and that led to the deep surface of the deep soil displacement, uplift of the surrounding soil, easily lead pipe pile offset, tilt, or pile fracture. Therefore, in the pile driver, route selection and determine the piling should take into account the land surface of the base load capacity and weak underlying layer of foundation settlement problems. Pond by laying the surface residue, ties, roadbed foundation reinforcement boxes, etc., scattered pile driver load. (2) Effect of technical measures to reduce soil paction, according to engineering experience a day and piling soil displacement caused by the added value will stop at night when about 25% of the decline, such as the night continued piling, pacting effect of soil caused by the level of vertical will always increase in displacement does not e down. Therefore, we should avoid the 24hour nonstop piling arrangements. b pile replacement rate of more than 4% can be prebored piling, pile diameter smaller than the pore size of about 50 ~ 100mm, depth of soil as the pile spacing and density, permeability, depending on the depth of the pile length of 1 should be / 3 to 1 / 2 (less than 12m), construction should be drilling with the fight. c projects around, stage construction of the blocks around the hole could be considered stress release, isolation trenches, sand wells and other measures. (3) Pile pile selected line route should be taken to take the long snakelike lines in the adjacent building or area should consider the need to protect the pipeline, from near and far, the construction of direction. As a result, can dissipate excess pore water pressure to provide as long as possible, to avoid the accumulation of superimposed, reducing the squeezing effect. (4) Pile piling speed control speed control in general lm / min is appropriate, to properly reflect the physical layers of soil shear strength. Exist in the local base surface obstructions such as large stones, it is necessary to avoid the pressure side. 4) The construction site should be equipped with emergency measures of sand bags, steel, steel, cement, grouting machines, generators and other construction tools. Grouting 11 to repair cracks in the ground to prevent surface water infiltr
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