Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method of concrete expanded head prestress anti-pulling anchor rod
The invention discloses a construction method of a concrete expanded head prestress uplift anchor rod. The construction method comprises the following steps of (1) movably pressing a steel sleeve on a pile end anchorage device, sinking the steel sleeve and the pile end anchorage device to a set depth, fixedly connecting a steel strand on the pile end anchorage device, and arranging a protective pipe fixed on an anchoring plate on the steel strand in a sleeve mode; (2) pouring fine aggregate concrete between the steel sleeve and the protective pipe; (3) repeatedly lifting upwards and inserting downwards the steel sleeve, enabling the fine aggregate concrete to flow out of the steel sleeve, and gradually forming a concrete expanded head, continuing pouring the fine aggregate concrete, and enabling a pile body with the set height to be formed in the steel sleeve; (4) pulling out the steel sleeve; and (5) excavating earthwork to a set depth, and tensioning and locking the steel strand after enabling the concrete expanded head to reach a curing period. The expanded head is formed by the fine aggregate concrete and is integrated with the surrounding soil body, so that the uplift bearing capacity is higher, and the problem of sediment at the bottom of a hole is solved in the construction process.
本发明公开了一种混凝土扩大头预应力抗拔锚杆的施工方法，步骤为：(1)将钢套管活动地抵压在桩端锚具上并一起下沉到设定深度，该桩端锚具上固定连接有钢绞线，并在钢绞线上套设有固定在锚固板上的防护管；(2)在钢套管与防护管之间灌入细石混凝土；(3)反复将钢套管向上提升和向下插入，使细石混凝土流出钢套管，逐渐形成混凝土扩大头；继续灌入细石混凝土，在钢套管内形成设定高度的桩体；(4)拔出钢套管；(5)开挖土方到设定深度，在混凝土扩大头达到养护期后，对钢绞线进行张拉并锁定。本申请所形成的扩大头由细石混凝土形成，且与周围的土体形成为一个整体，具有更高的抗拔承载力，在施工过程中，没有孔底沉渣问题。
Construction method of concrete expanded head prestress anti-pulling anchor rod
The invention discloses a construction method of a concrete expanded head prestress uplift anchor rod. The construction method comprises the following steps of (1) movably pressing a steel sleeve on a pile end anchorage device, sinking the steel sleeve and the pile end anchorage device to a set depth, fixedly connecting a steel strand on the pile end anchorage device, and arranging a protective pipe fixed on an anchoring plate on the steel strand in a sleeve mode; (2) pouring fine aggregate concrete between the steel sleeve and the protective pipe; (3) repeatedly lifting upwards and inserting downwards the steel sleeve, enabling the fine aggregate concrete to flow out of the steel sleeve, and gradually forming a concrete expanded head, continuing pouring the fine aggregate concrete, and enabling a pile body with the set height to be formed in the steel sleeve; (4) pulling out the steel sleeve; and (5) excavating earthwork to a set depth, and tensioning and locking the steel strand after enabling the concrete expanded head to reach a curing period. The expanded head is formed by the fine aggregate concrete and is integrated with the surrounding soil body, so that the uplift bearing capacity is higher, and the problem of sediment at the bottom of a hole is solved in the construction process.
本发明公开了一种混凝土扩大头预应力抗拔锚杆的施工方法，步骤为：(1)将钢套管活动地抵压在桩端锚具上并一起下沉到设定深度，该桩端锚具上固定连接有钢绞线，并在钢绞线上套设有固定在锚固板上的防护管；(2)在钢套管与防护管之间灌入细石混凝土；(3)反复将钢套管向上提升和向下插入，使细石混凝土流出钢套管，逐渐形成混凝土扩大头；继续灌入细石混凝土，在钢套管内形成设定高度的桩体；(4)拔出钢套管；(5)开挖土方到设定深度，在混凝土扩大头达到养护期后，对钢绞线进行张拉并锁定。本申请所形成的扩大头由细石混凝土形成，且与周围的土体形成为一个整体，具有更高的抗拔承载力，在施工过程中，没有孔底沉渣问题。
Construction method of concrete expanded head prestress anti-pulling anchor rod
一种混凝土扩大头预应力抗拔锚杆的施工方法
LI RENMIN (Autor:in) / GENG XIAOBO (Autor:in) / GE LIRUI (Autor:in) / WANG TAO (Autor:in) / LIU XIAOBO (Autor:in) / LIU FEI (Autor:in) / WANG JIANLAN (Autor:in)
16.04.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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