A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
High-precision hole forming method suitable for deep foundation pit pile foundation with long hollow pile
The invention discloses a high-precision hole forming method suitable for a deep foundation pit pile foundation with a long hollow pile. The high-precision hole forming method comprises the following steps that S1, the hollow pile diameter D1 and the long steel pile casing diameter D2 are calculated; s2, rotary excavating and tapping construction; s21, paying off and positioning, and burying an orifice pile casing; s22, a rotary excavating drill bit with the diameter D1 is selected, a hole is formed to a strong weathering layer, and drilling of an empty pile part is completed; s23, the long steel casing follows up to a strong weathering layer; and S24, after the long steel casing is adjusted and positioned, a rotary excavating drill bit with the diameter of D3 is replaced to continue drilling to the designed depth of the pile foundation, then the perpendicularity of a final hole of the pile foundation is detected, if the perpendicularity does not meet the requirement, the pile foundation is backfilled, the steps S21-S23 are repeated till the requirement for the perpendicularity of the final hole is finally met, and drilling is finished. And S3, hole cleaning. According to the method, a whole set of construction method for one-time hole forming through overlong pile foundation ground drilling is provided, and an iteration deviation correction strategy convenient to implement on site is given, so that the construction quality and precision are guaranteed.
本发明公开了一种适用于具有长空桩的深基坑桩基高精度成孔方法，包括如下步骤：S1：空桩桩径D1及长钢护筒直径D2计算；S2：旋挖开孔施工；S21：放线定位，埋设孔口护筒；S22：选用直径D1的旋挖钻头，成孔至强风化层，完成空桩部分钻孔；S23：长钢护筒跟进至强风化层；S24：长钢护筒调整定位完成后，置换直径为D3的旋挖钻头继续钻进至桩基设计深度，然后检测桩基的终孔垂直度，若垂直度不满足要求，则回填桩基，重复步骤S21～S23，直到最终满足终孔垂直度要求，钻孔结束；S3：清孔。本发明方法提供了超长桩基地面钻进一次成孔的全套施工方法，并给出便于现场实施的迭代纠偏策略，从而保证了施工质量和精度。
High-precision hole forming method suitable for deep foundation pit pile foundation with long hollow pile
The invention discloses a high-precision hole forming method suitable for a deep foundation pit pile foundation with a long hollow pile. The high-precision hole forming method comprises the following steps that S1, the hollow pile diameter D1 and the long steel pile casing diameter D2 are calculated; s2, rotary excavating and tapping construction; s21, paying off and positioning, and burying an orifice pile casing; s22, a rotary excavating drill bit with the diameter D1 is selected, a hole is formed to a strong weathering layer, and drilling of an empty pile part is completed; s23, the long steel casing follows up to a strong weathering layer; and S24, after the long steel casing is adjusted and positioned, a rotary excavating drill bit with the diameter of D3 is replaced to continue drilling to the designed depth of the pile foundation, then the perpendicularity of a final hole of the pile foundation is detected, if the perpendicularity does not meet the requirement, the pile foundation is backfilled, the steps S21-S23 are repeated till the requirement for the perpendicularity of the final hole is finally met, and drilling is finished. And S3, hole cleaning. According to the method, a whole set of construction method for one-time hole forming through overlong pile foundation ground drilling is provided, and an iteration deviation correction strategy convenient to implement on site is given, so that the construction quality and precision are guaranteed.
本发明公开了一种适用于具有长空桩的深基坑桩基高精度成孔方法，包括如下步骤：S1：空桩桩径D1及长钢护筒直径D2计算；S2：旋挖开孔施工；S21：放线定位，埋设孔口护筒；S22：选用直径D1的旋挖钻头，成孔至强风化层，完成空桩部分钻孔；S23：长钢护筒跟进至强风化层；S24：长钢护筒调整定位完成后，置换直径为D3的旋挖钻头继续钻进至桩基设计深度，然后检测桩基的终孔垂直度，若垂直度不满足要求，则回填桩基，重复步骤S21～S23，直到最终满足终孔垂直度要求，钻孔结束；S3：清孔。本发明方法提供了超长桩基地面钻进一次成孔的全套施工方法，并给出便于现场实施的迭代纠偏策略，从而保证了施工质量和精度。
High-precision hole forming method suitable for deep foundation pit pile foundation with long hollow pile
一种适用于具有长空桩的深基坑桩基高精度成孔方法
CHEN KEXU (author) / LYU WENZHI (author) / XIAO SHUIFENG (author) / XUE GANG (author) / LUO YUNKAI (author) / LIANG HAO (author) / LI JIANHU (author) / TANG TAO (author)
2024-03-26
Patent
Electronic Resource
Chinese
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