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DCM construction method for offshore deep cement mixing pile with horizontal cantilever
The invention discloses a DCM construction method for an offshore deep cement mixing pile with a horizontal cantilever. The DCM construction method comprises the following steps that a DCM engineering ship is driven to a preset position; based on the stratum distribution data and the design construction coordinates of the cement soil mixing piles, the construction mode of the mixing piles is determined; if the gradient of the rock stratum at the construction position is smaller than a gradient threshold value, a direct stirring construction mode is adopted; if the gradient of the rock stratum at the construction position is larger than a gradient threshold value, a horizontal cantilever reinforcing and stirring construction mode is adopted, specifically, a variable-diameter drill bit mechanism in a drilling machine system is used for downwards stretching into the surface of the rock stratum and drilling to form a conical hole located in the surface of the rock stratum, and a horizontal cantilever pile hole is further constructed; and the four-axis DCM drill bit performs downward stirring construction and grouting to form a stirring pile group. The horizontal cantilever has the advantages that the intelligent and automatic degree is high, the horizontal cantilever can adapt to different seabed rock stratum terrains, and the horizontal cantilever can be constructed on a rock stratum with a steep slope, so that the stability is improved.
本发明公开了一种具有水平悬臂的海上深层水泥土搅拌桩的DCM施工方法，包括以下步骤：将DCM工程船行驶至预定位置；基于地层分布数据以及各水泥土搅拌桩的设计施工坐标，确定各搅拌桩的施工方式；若所施作位置的岩层坡度小于坡度阈值，则采用直接搅拌施工方式；若所施作位置的岩层坡度大于坡度阈值，则采用水平悬臂加固搅拌施工方式，其具体是指：利用钻机系统中的可变径式钻头机构下探入岩层表面并进行钻进以形成位于岩层表面的锥形孔，且进一步施作水平悬臂桩孔，四轴DCM钻头进行向下搅拌施工并注浆，以形成搅拌桩组。本发明的优点是：智能化和自动化程度高，可适应不同海床岩层地形，可在坡度较陡的岩层上施作水平悬臂，从而提高稳定性。
DCM construction method for offshore deep cement mixing pile with horizontal cantilever
The invention discloses a DCM construction method for an offshore deep cement mixing pile with a horizontal cantilever. The DCM construction method comprises the following steps that a DCM engineering ship is driven to a preset position; based on the stratum distribution data and the design construction coordinates of the cement soil mixing piles, the construction mode of the mixing piles is determined; if the gradient of the rock stratum at the construction position is smaller than a gradient threshold value, a direct stirring construction mode is adopted; if the gradient of the rock stratum at the construction position is larger than a gradient threshold value, a horizontal cantilever reinforcing and stirring construction mode is adopted, specifically, a variable-diameter drill bit mechanism in a drilling machine system is used for downwards stretching into the surface of the rock stratum and drilling to form a conical hole located in the surface of the rock stratum, and a horizontal cantilever pile hole is further constructed; and the four-axis DCM drill bit performs downward stirring construction and grouting to form a stirring pile group. The horizontal cantilever has the advantages that the intelligent and automatic degree is high, the horizontal cantilever can adapt to different seabed rock stratum terrains, and the horizontal cantilever can be constructed on a rock stratum with a steep slope, so that the stability is improved.
本发明公开了一种具有水平悬臂的海上深层水泥土搅拌桩的DCM施工方法，包括以下步骤：将DCM工程船行驶至预定位置；基于地层分布数据以及各水泥土搅拌桩的设计施工坐标，确定各搅拌桩的施工方式；若所施作位置的岩层坡度小于坡度阈值，则采用直接搅拌施工方式；若所施作位置的岩层坡度大于坡度阈值，则采用水平悬臂加固搅拌施工方式，其具体是指：利用钻机系统中的可变径式钻头机构下探入岩层表面并进行钻进以形成位于岩层表面的锥形孔，且进一步施作水平悬臂桩孔，四轴DCM钻头进行向下搅拌施工并注浆，以形成搅拌桩组。本发明的优点是：智能化和自动化程度高，可适应不同海床岩层地形，可在坡度较陡的岩层上施作水平悬臂，从而提高稳定性。
DCM construction method for offshore deep cement mixing pile with horizontal cantilever
具有水平悬臂的海上深层水泥土搅拌桩的DCM施工方法
LI SHAOHUA (author) / HUANG CHANGFU (author) / WANG PENG (author) / YANG YUYOU (author) / LI WENBING (author) / XIE LEI (author) / YAO TIEJUN (author) / LIU ZHONGXIN (author) / LEE KEONWANG (author) / QI WENRUI (author)
2023-08-01
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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