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A platform for research: civil engineering, architecture and urbanism
Construction method for rotary drilling of super-hard rock stratum
The invention discloses a construction method for rotary drilling of a super-hard rock stratum, and relates to the technical field of construction hole forming. The construction method comprises the following steps that 1, the compressive strength of a rock layer is determined to be a; 2, according to a preset construction scheme, the pile diameter of a formed hole is determined; 3, the number of layers of small holes, the circle center distance from the circle center of each layer of small holes to the circle center of the formed hole and the radius of the small holes are determined according to the pile diameter; 4, the number of the small holes in each layer is determined according to the hardness and the circle center distance of the rock layer; 5, the position of each small hole is determined, and a mark is made; 6, the small holes are drilled by a down-the-hole hammer in cooperation with a drilling machine according to the mark; and 7, rotary drilling is carried out by using a rotary drilling machine. According to the construction method, the small holes are formed in the complete hard rock through the down-the-hole hammer, the section is changed into a small section, the stratum stress is released, so that the rock is easier to break, then the rotary drilling machine is used for drilling, and therefore the effects of being high in hole forming speed, low in cost, high in mechanization degree and low in safety risk are achieved in the construction environment of the super-hard rock stratum.
本发明公开了一种超硬岩层旋挖成孔的施工方法，涉及施工成孔技术领域。本发明包括一下步骤：步骤一：确定岩石层的抗压强度为a；步骤二：根据预设的施工方案，确定成孔的桩径；步骤三：根据桩径确定小孔的层数，每层小孔圆心到成孔圆心的圆心距，小孔半径；步骤四：根据岩石层的硬度和圆心距确定每层小孔的数量；步骤五：确定每个小孔的位置，并做好标记；步骤六：按照标记用潜孔锤配合钻机打小孔；步骤七：使用旋挖钻机旋挖成孔。本发明通过在完整的坚硬岩石上通过潜孔锤成小孔，变大断面为小断面，释放地层应力，让岩石更容易破碎，再用旋挖钻机进行钻进，从而在超硬岩层的施工环境下具备成孔速度快、成本低、机械化程度高和安全风险低的效果。
Construction method for rotary drilling of super-hard rock stratum
The invention discloses a construction method for rotary drilling of a super-hard rock stratum, and relates to the technical field of construction hole forming. The construction method comprises the following steps that 1, the compressive strength of a rock layer is determined to be a; 2, according to a preset construction scheme, the pile diameter of a formed hole is determined; 3, the number of layers of small holes, the circle center distance from the circle center of each layer of small holes to the circle center of the formed hole and the radius of the small holes are determined according to the pile diameter; 4, the number of the small holes in each layer is determined according to the hardness and the circle center distance of the rock layer; 5, the position of each small hole is determined, and a mark is made; 6, the small holes are drilled by a down-the-hole hammer in cooperation with a drilling machine according to the mark; and 7, rotary drilling is carried out by using a rotary drilling machine. According to the construction method, the small holes are formed in the complete hard rock through the down-the-hole hammer, the section is changed into a small section, the stratum stress is released, so that the rock is easier to break, then the rotary drilling machine is used for drilling, and therefore the effects of being high in hole forming speed, low in cost, high in mechanization degree and low in safety risk are achieved in the construction environment of the super-hard rock stratum.
本发明公开了一种超硬岩层旋挖成孔的施工方法，涉及施工成孔技术领域。本发明包括一下步骤：步骤一：确定岩石层的抗压强度为a；步骤二：根据预设的施工方案，确定成孔的桩径；步骤三：根据桩径确定小孔的层数，每层小孔圆心到成孔圆心的圆心距，小孔半径；步骤四：根据岩石层的硬度和圆心距确定每层小孔的数量；步骤五：确定每个小孔的位置，并做好标记；步骤六：按照标记用潜孔锤配合钻机打小孔；步骤七：使用旋挖钻机旋挖成孔。本发明通过在完整的坚硬岩石上通过潜孔锤成小孔，变大断面为小断面，释放地层应力，让岩石更容易破碎，再用旋挖钻机进行钻进，从而在超硬岩层的施工环境下具备成孔速度快、成本低、机械化程度高和安全风险低的效果。
Construction method for rotary drilling of super-hard rock stratum
一种超硬岩层旋挖成孔的施工方法
HE ZHENGYONG (author)
2021-06-11
Patent
Electronic Resource
Chinese
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