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Construction method of jet grouting spiral anchor rod pile for power transmission line foundation
The invention discloses a construction method of a jet grouting spiral anchor rod pile for a power transmission line foundation, which at least comprises the following steps: step A, drilling a guide hole: drilling a hole to a preset depth in a stratum by using a drilling machine which is provided with a drill rod and a drill bit connected to the end part of the drill rod, an axial through channel is arranged in the drill rod, the drill bit is provided with a cavity communicated with the channel, and the guide hole is formed in the cavity; the drill bit is provided with at least two high-pressure jet nozzles radially penetrating to the cavity in the circumferential direction; step B, drill retreating and rotary spraying are conducted, after the drill bit drills to the preset depth, high-pressure cement paste is injected into the channel, and the high-pressure cement paste is sprayed out through a high-pressure jet nozzle to form high-speed jet flow to cut and stir surrounding rock and soil; c, spiral drilling and anchoring are conducted, specifically, a drill rod is replaced with a spiral anchor rod, and the spiral anchor rod is rotationally drilled to the designed depth from the guide hole; and step D, waiting for solidification of the cement paste. According to the construction method, the installation difficulty of the spiral anchor rod pile can be reduced, the stability of the spiral anchor rod pile is greatly improved, and the service life is greatly prolonged.
本发明公开了一种用于输电线路基础的旋喷螺旋锚杆桩施工方法，至少包括：步骤A，钻引导孔，用钻机在地层中钻孔至预定深度，所述钻机设置有钻杆和连接于钻杆端部的钻头，钻杆内部设置有轴向贯通的通道，钻头设置有与通道连通的腔体，所述钻头沿圆周方向设置有至少两个径向贯通至腔体的高压射流喷嘴；步骤B，退钻旋喷，所述钻头钻至预定深度后，向通道内注入高压水泥浆，高压水泥浆通过高压射流喷嘴喷出形成高速射流对周围岩土进行切割搅拌；步骤C，螺旋钻锚，将钻杆更换为螺旋锚杆，将螺旋锚杆从引导孔旋转钻进至设计深度；步骤D，等待水泥浆凝固。本施工方法可以降低螺旋锚杆桩的安装难度，并大幅度提高螺旋锚杆桩的稳固性和使用寿命。
Construction method of jet grouting spiral anchor rod pile for power transmission line foundation
The invention discloses a construction method of a jet grouting spiral anchor rod pile for a power transmission line foundation, which at least comprises the following steps: step A, drilling a guide hole: drilling a hole to a preset depth in a stratum by using a drilling machine which is provided with a drill rod and a drill bit connected to the end part of the drill rod, an axial through channel is arranged in the drill rod, the drill bit is provided with a cavity communicated with the channel, and the guide hole is formed in the cavity; the drill bit is provided with at least two high-pressure jet nozzles radially penetrating to the cavity in the circumferential direction; step B, drill retreating and rotary spraying are conducted, after the drill bit drills to the preset depth, high-pressure cement paste is injected into the channel, and the high-pressure cement paste is sprayed out through a high-pressure jet nozzle to form high-speed jet flow to cut and stir surrounding rock and soil; c, spiral drilling and anchoring are conducted, specifically, a drill rod is replaced with a spiral anchor rod, and the spiral anchor rod is rotationally drilled to the designed depth from the guide hole; and step D, waiting for solidification of the cement paste. According to the construction method, the installation difficulty of the spiral anchor rod pile can be reduced, the stability of the spiral anchor rod pile is greatly improved, and the service life is greatly prolonged.
本发明公开了一种用于输电线路基础的旋喷螺旋锚杆桩施工方法，至少包括：步骤A，钻引导孔，用钻机在地层中钻孔至预定深度，所述钻机设置有钻杆和连接于钻杆端部的钻头，钻杆内部设置有轴向贯通的通道，钻头设置有与通道连通的腔体，所述钻头沿圆周方向设置有至少两个径向贯通至腔体的高压射流喷嘴；步骤B，退钻旋喷，所述钻头钻至预定深度后，向通道内注入高压水泥浆，高压水泥浆通过高压射流喷嘴喷出形成高速射流对周围岩土进行切割搅拌；步骤C，螺旋钻锚，将钻杆更换为螺旋锚杆，将螺旋锚杆从引导孔旋转钻进至设计深度；步骤D，等待水泥浆凝固。本施工方法可以降低螺旋锚杆桩的安装难度，并大幅度提高螺旋锚杆桩的稳固性和使用寿命。
Construction method of jet grouting spiral anchor rod pile for power transmission line foundation
一种用于输电线路基础的旋喷螺旋锚杆桩施工方法
YU HUIYOU (author) / MAO HUAJIN (author) / ZHAO YONG (author) / ZHENG LILIANG (author)
2024-04-19
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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