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首页-新闻资讯-深基坑钢板桩拔除有哪些施工工艺?

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来源:http://www.jnlsgbz.com/ 日期:2021-04-30 发布人:lasen
钢板桩施工&;深基坑钢板桩施工技术
Steel sheet pile construction & Construction Technology of steel sheet pile in deep foundation pit
1.拆除内支架,焊工进入基坑,拆除钢板桩围护结构的钢梁,切断锚杆,先拆除中间的两个长支座,取下角支撑。每次拆卸支架时,用起重机吊起。18毫米厚的钢板必 须安放在起重机下面。
1. Remove the inner support, welders enter the foundation pit, remove the steel beam of the steel sheet pile retaining structure, cut off the anchor rod, first remove the two long supports in the middle, and remove the corner support. Each time the bracket is disassembled, lift it with a crane. 18 mm thick steel plate must be placed under the crane.
两个。土方回填(1)土方回填前,应去除水分、淤泥、杂物等,分层填土压实,每层厚度200 mm,直至达到设计要求。
Two. Earthwork backfilling (1) before earthwork backfilling, the water, silt, debris, etc. shall be removed, and the filling soil shall be compacted in layers, with the thickness of each layer of 200 mm, until it meets the design requirements.
2.对各层回填层的厚度严格控制,立式捣固机各层厚度不大于300 mm。(3)填筑时,每层应夯实三次,夯实时应夯实,半夯、夯实、夯实,成直线连接,纵向和横向交叉。(4)回填土的压实系数不小于0.94。
2. The thickness of each layer of backfill layer shall be strictly controlled, and the thickness of each layer of vertical tamping machine shall not be greater than 300 mm( 3) When filling, each layer should be tamped three times, and tamped, semi tamped, tamped, tamped, connected in a straight line, and crossed longitudinally and transversely( 4) The compaction coefficient of backfill is not less than 0.94.
               钢板桩施工租赁
3.钢板桩 拔除
3. Steel sheet pile removal
深基坑回填后,钢板桩被拔出,修复后再使用。拔出前"应注意钢板桩的提取顺序、时间和桩孔处理方法。拉桩时会出现一定的振动,如拔桩引起的土体位移过大、地面沉降过大等,会对施工中的地下结构造成危害,影响相邻管桩的正常使用。钢板桩由振动锤和起重机拆除。后者用于振动锤不能拔出的钢板桩,在钢板桩上设置一个吊架,当振动锤拔出时,吊车被拉起。"振动锤产生强迫振动,破坏板桩与周围土壤之间的粘着力,依靠附加的提升力将桩拉出,以克服桩的拉力。"拔出桩时,用振动锤振动船闸,以减少与土的粘结,然后拔出振动边。"对于难以拔出的桩,可先用柴油锤振动,然后与振动锤交替进行振动和拉力。为了及时填补桩洞,当桩被拉得略高于基础地板时,拉图被悬挂,土孔被振动锤振动填充几分钟。通过振动法、压实法和充填法,可及时填补因抽桩而产生的桩孔,以减少对邻近环境的影响。
After the deep foundation pit is backfilled, the steel sheet pile is pulled out and used after repair. Before pulling out, attention should be paid to the extraction sequence, time and pile hole treatment method of steel sheet pile. When pulling piles, there will be certain vibration, such as excessive soil displacement and ground settlement caused by pulling piles, which will cause harm to the underground structure in construction and affect the normal use of adjacent pipe piles. The steel sheet pile is removed by vibrating hammer and crane. The latter is used for the steel sheet pile which can not be pulled out by the vibrating hammer. A hanger is set on the steel sheet pile. When the vibrating hammer is pulled out, the crane is pulled up“ The forced vibration of the vibratory hammer will destroy the adhesion between the sheet pile and the surrounding soil, and the pile will be pulled out by the additional lifting force to overcome the tension of the pile“ When the pile is pulled out, the ship lock is vibrated with a vibrating hammer to reduce the bond with the soil, and then the vibrating edge is pulled out“ For the pile which is difficult to pull out, the diesel hammer can be used for vibration first, and then the vibration and tension can be carried out alternately with the vibration hammer. In order to fill the pile hole in time, when the pile is pulled slightly higher than the foundation floor, the drawing is suspended, and the soil hole is filled by vibrating hammer for a few minutes. Through the vibration method, compaction method and filling method, the pile holes caused by pile extraction can be filled in time to reduce the impact on the adjacent environment.
主要内容如下:(1)在拔桩、平桩、夯实施工现场前,拆除和拆除高空障碍物。修建临时运输道路,设置电力和照明线路,拆除桩头附近的土壤,检修机械和设备,并制定施工计划。"(2)选择振动拔桩机和起重机进行拔桩,符合以下规定:A。拔桩机的打桩头在拔桩前夹紧桩头,使提升线与桩的线重合;B,拉线开始稍微松开钩,当振动机振动1-1时。5 min时,吊钩随幅值的增大而加强,缓慢提升;C、钢板桩在吊车直接举升时停止。钢板桩同时被吊起时,用落锤破碎;D,钢桩及时提起,起桩点必须在1≤安培≤47≤3桩长以上;(3)在拔桩过程中,随时观察吊车尾部以防止倾覆;(4)钢板桩一个接一个拉出,便于先拔出;(3)拉桩过程中,随时观察吊车尾部,防止倾覆;(4)钢板桩一个接一个拉出,易于先拔出。拉起时,用落锤振动一下,等锁松开再拉上来。"5在拉桩中,当操作方法正确时,拔桩机的振幅达到限大载荷,当振动不能拉起30 min时,停止振动并采取其他措施。
The main contents are as follows: (1) remove and remove the high-altitude obstacles before pulling, leveling and tamping the construction site. Build temporary transportation roads, set up power and lighting lines, remove the soil near the pile head, overhaul machinery and equipment, and make construction plans“( 2) The vibration pile extractor and crane are selected to pull out the pile, which meet the following requirements: a. The pile driving head of the pile extractor clamps the pile head before pulling the pile to make the lifting line coincide with the center line of the pile; B. The cable starts to loosen the hook slightly when the vibrator vibrates 1-1. At 5 min, the hook is strengthened with the increase of amplitude, and slowly lifted; C. The steel sheet pile stops when the crane lifts directly. When the steel sheet pile is hoisted at the same time, it will be broken by falling hammer; D. The steel pile should be lifted in time, and the starting point must be 1 ≤ a ≤ 47 ≤ 3 pile length( 3) During the pile pulling process, observe the tail of the crane at any time to prevent overturning( 4) The steel sheet piles are pulled out one by one, so that they can be pulled out first( 3) During pile pulling, observe the tail of crane at any time to prevent overturning( 4) The steel sheet pile is pulled out one by one, which is easy to pull out first. When pulling up, use the drop hammer to vibrate, and then pull up when the lock is released“ When the operation method is correct, the amplitude of the pile extractor reaches the maximum load. When the vibration cannot be pulled up for 30 min, stop the vibration and take other measures.
4.用冷弯法修复和矫直拉钢桩。
4. Repair and straighten the steel pile with cold bending method.
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