Construction method for replacing old pile: Fid-Bau Portal

Construction method for replacing old pile

MA GUIZHOU / GONG QINLEI / WANG YANG

The invention relates to a construction method for replacing an old pile, and relates to the field of concrete pile body replacement. The construction method comprises the steps that a steel sleeve is installed through construction equipment, the steel sleeve surrounds the old pile, a positioning groove is formed in the inner wall of the steel sleeve in the axial direction, and a connecting assembly is arranged at the top end of the steel sleeve; a pressurizing plate is inserted into the steel sleeve along the positioning groove, the position of the pressurizing plate in the steel sleeve is limited by using a connecting assembly, the pressurizing plate comprises a guide edge matched with the positioning groove and a loading edge, the included angle between the guide edge and the loading edge is an acute angle, and at the moment, the acute angle between the guide edge and the loading edge points to the bottom of the steel sleeve; the steel sleeve is spirally pressed downwards by using the construction equipment, and the loading edge loads the old pile for the first time till the old pile is fractured; the old pile fractured for the first time is hoisted out of the steel sleeve; a filler fills into the steel sleeve, and the steel sleeve is upwards taken out at the same time; a pile casing is embedded in the ground; and a new pile is poured into the pile casing. The method has the effect of improving the construction efficiency of old pile replacement.

本申请涉及一种替换旧桩的施工方法，涉及混凝土桩体更换的领域，其包括使用施工设备安装钢套筒，使钢套筒环绕旧桩，钢套筒的内壁上沿轴向形成有定位槽，钢套筒的顶端设置有连接组件；沿定位槽向钢套筒内插入加压板，并使用连接组件限制加压板在钢套筒内的位置，加压板包括与定位槽配合的导向边和与导向边夹角为锐角的加载边，此时导向边与加载边的锐角指向钢套筒底部；使用施工设备螺旋下压钢套筒，使加载边对旧桩初次加载，直到旧桩断裂；将初次断裂的旧桩吊装出钢套筒；向钢套筒内注入填充物，同时向上取出钢套筒；在地面上埋入护筒；向护筒内浇注新桩。本申请具有提升替换旧桩的施工效率的效果。

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