外文翻譯---軟土質(zhì)條件下管樁施工的技術(shù)措施-資料下載頁(yè)
2025-05-12 08:38本頁(yè)面
【導(dǎo)讀】具有較好的沖擊性能，穿透能力強(qiáng)，承載力高，抗彎抗裂性能好，施工方便快捷，質(zhì)量穩(wěn)定，可靠度高，耐久性好等優(yōu)點(diǎn)，被廣泛應(yīng)用到高層建筑基礎(chǔ)。關(guān)于管樁施工中的技術(shù)措施。有很好的進(jìn)行控制，將會(huì)引起偏樁、斷樁等的質(zhì)量事故發(fā)生。因此，我們必須針對(duì)。性質(zhì)相差較大，縱向、橫向的擠壓均容易產(chǎn)生變形。同時(shí)，由于其含水量大，透水。系數(shù)小、固結(jié)時(shí)間長(zhǎng)的特點(diǎn)又使得土體受到擾動(dòng)后很難迅速恢復(fù)。管樁自身的抗壓強(qiáng)度較高，但是抗彎強(qiáng)度較低，不同土層間的水平。因此，軟土地區(qū)管樁的施工對(duì)土方開(kāi)挖有著極大的影。臺(tái)階寬度與臺(tái)階下挖土深度的比值應(yīng)在5以上。應(yīng)盡量避免工程樁位于土方坡道兩側(cè)斜坡?？觾?nèi)運(yùn)土車輛避免使用10t大車。2）禁止挖機(jī)碰撞樁身。置袋裝砂井或塑料排水板，用來(lái)消除部分超孔隙水壓力，減少擠土現(xiàn)象。距與袋裝砂井相同。正確反映其抗剪能力。
【正文】 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 infiltration, and promptly organize the project department and experts to identify cause of the cracks. When the horizontal displacement of the slope above the warning value, should immediately stop the appropriate range of earth excavation, backfill, or, when necessary, temporary steel sheet piles of pine pile support to control the deformation development. In summary, weak geological condition, the process of construction of earth excavation and technical measures to deploy a reasonable arrangement, and the pipe construction reduces the effective control of squeezing effect, can effectively avoid the pile soil displacement caused by partial shift, broken pile, the surrounding roads, building settlement and other issues, social benefits. At the same time, reduce the pile39。s handling also reduces expenses.
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