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A platform for research: civil engineering, architecture and urbanism
Rotary drilling method for upper-soft lower-hard stratum
The invention relates to a rotary drilling hole-forming method for an upper-soft and lower-hard stratum, which comprises the following steps: S1, drilling a plurality of reinforcing pile holes in a loose soil layer in the upper-soft and lower-hard stratum, pouring reinforcing slurry into the reinforcing pile holes by adopting a jet grouting pile machine, and obtaining reinforcing piles after the reinforcing slurry is solidified; s2, a plurality of rotary drilling holes are drilled in the pre-pile-forming position of the reinforced loose soil layer through a cutting tooth cylinder drill of a rotary drilling rig, and when drilling is conducted on the position of an original enclosure structure body in the upper-soft lower-hard stratum, the original enclosure structure body is cut off and continues to be drilled downwards; it is ensured that an original enclosure structure body in the rotary digging hole is completely cut off, and the rotary digging hole bottom is stable; and S3, the cut-off original enclosure structure body is taken out of the rotary digging hole, and then pile forming operation is completed. After the loose soil layer is reinforced through the reinforcing pile, the construction surface is more stable, so that the steel casing used in the rotary drilling process can be shortened, the position of a drilling machine for drilling the rotary drilling hole can be more stable, and the precision of the drilled rotary drilling hole is higher.
本发明涉及一种上软下硬地层的旋挖成孔方法，包括以下步骤：S1、在上软下硬地层中的松散土层上钻多个加固桩孔，采用旋喷桩机向加固桩孔内灌入加固浆，加固浆凝固后得到加固桩；S2、采用旋挖钻机的截齿筒钻在加固后的松散土层上的预先成桩位置钻多个旋挖孔，其中在钻至上软下硬地层中的原有围护结构体位置时，将原有围护结构体切断并继续向下钻进，确保旋挖孔内的原有围护结构体被完全切断且旋挖孔底稳定；S3、将切断的原有围护结构体从旋挖孔取出，然后完成成桩作业。本发明通过加固桩对松散土层进行加固后，使施工面更稳固，从而能够减短钻取旋挖孔过程中所使用的钢护筒，且能够使钻取旋挖孔的钻机的位置更稳定，钻取的旋挖孔的精度更高。
Rotary drilling method for upper-soft lower-hard stratum
The invention relates to a rotary drilling hole-forming method for an upper-soft and lower-hard stratum, which comprises the following steps: S1, drilling a plurality of reinforcing pile holes in a loose soil layer in the upper-soft and lower-hard stratum, pouring reinforcing slurry into the reinforcing pile holes by adopting a jet grouting pile machine, and obtaining reinforcing piles after the reinforcing slurry is solidified; s2, a plurality of rotary drilling holes are drilled in the pre-pile-forming position of the reinforced loose soil layer through a cutting tooth cylinder drill of a rotary drilling rig, and when drilling is conducted on the position of an original enclosure structure body in the upper-soft lower-hard stratum, the original enclosure structure body is cut off and continues to be drilled downwards; it is ensured that an original enclosure structure body in the rotary digging hole is completely cut off, and the rotary digging hole bottom is stable; and S3, the cut-off original enclosure structure body is taken out of the rotary digging hole, and then pile forming operation is completed. After the loose soil layer is reinforced through the reinforcing pile, the construction surface is more stable, so that the steel casing used in the rotary drilling process can be shortened, the position of a drilling machine for drilling the rotary drilling hole can be more stable, and the precision of the drilled rotary drilling hole is higher.
本发明涉及一种上软下硬地层的旋挖成孔方法，包括以下步骤：S1、在上软下硬地层中的松散土层上钻多个加固桩孔，采用旋喷桩机向加固桩孔内灌入加固浆，加固浆凝固后得到加固桩；S2、采用旋挖钻机的截齿筒钻在加固后的松散土层上的预先成桩位置钻多个旋挖孔，其中在钻至上软下硬地层中的原有围护结构体位置时，将原有围护结构体切断并继续向下钻进，确保旋挖孔内的原有围护结构体被完全切断且旋挖孔底稳定；S3、将切断的原有围护结构体从旋挖孔取出，然后完成成桩作业。本发明通过加固桩对松散土层进行加固后，使施工面更稳固，从而能够减短钻取旋挖孔过程中所使用的钢护筒，且能够使钻取旋挖孔的钻机的位置更稳定，钻取的旋挖孔的精度更高。
Rotary drilling method for upper-soft lower-hard stratum
一种上软下硬地层的旋挖成孔方法
SHI XINPENG (author) / CHOCRON (author) / CHEN CHAOJUN (author) / LIU HAILONG (author) / MO YONGWEI (author) / CHEN JINPEI (author) / XIAO QIANG (author) / GONG YUANZHONG (author) / ZHANG GUOLIN (author) / ZHOU WENLONG (author)
2022-11-04
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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