A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Sectional type grouting reinforcement method for existing pile foundation
The invention relates to the technical field of existing pile foundation reinforcement engineering and grouting engineering and particularly relates to a sectional type grouting reinforcement method for an existing pile foundation. A drilling position is arranged on a soil layer around an existing pile, first-stage drilling is adopted at the drilling position to open to the position a, a first-stage orifice pipe is installed, and grouting and sealing are conducted; then sectional grouting is carried out till grouting at the final hole position is completed; in the sectional type grouting, the grouting process of each section comprises the steps that secondary drilling is carried out, a grouting pipe is placed in, grouting and sealing are carried out, and drilling and grouting reinforcement are carried out in the grouting pipe; the depth of the second-stage drilling hole is the sum of the length of the previous section of drilling hole and the length of the designed reinforcing section; the depth of the position a is 24-26% of the length of the existing pile, and the depth of the end hole position is 0.9-1.1 times of the length of the existing pile. According to the grouting reinforcement method, grout can be prevented from moving upwards, pile foundation reinforcement is more sufficient, and the pile foundation bearing capacity after grouting can be obtained accurately.
本发明涉及既有桩基加固工程和注浆工程技术领域，具体涉及一种既有桩基分段式注浆加固方法。在既有桩周围的土层布置钻孔位置，在钻孔位置采用一级钻孔开孔到a处，安装一级孔口管，并注浆封固；然后分段式注浆直至完成终孔位置的注浆；分段式注浆中，每段注浆的过程为：进行二级钻孔，放入注浆管并注浆封固，在注浆管中钻孔，注浆加固；二级钻孔的深度为前一段钻孔长度与设计加固段长度之和；a处位置的深度为既有桩长度的24～26％，终孔位置的深度为既有桩长度的0.9～1.1倍。本发明的注浆加固方法能够防止浆液上返、使桩基加固更加充分，且能较精确的得到注浆后的桩基承载力。
Sectional type grouting reinforcement method for existing pile foundation
The invention relates to the technical field of existing pile foundation reinforcement engineering and grouting engineering and particularly relates to a sectional type grouting reinforcement method for an existing pile foundation. A drilling position is arranged on a soil layer around an existing pile, first-stage drilling is adopted at the drilling position to open to the position a, a first-stage orifice pipe is installed, and grouting and sealing are conducted; then sectional grouting is carried out till grouting at the final hole position is completed; in the sectional type grouting, the grouting process of each section comprises the steps that secondary drilling is carried out, a grouting pipe is placed in, grouting and sealing are carried out, and drilling and grouting reinforcement are carried out in the grouting pipe; the depth of the second-stage drilling hole is the sum of the length of the previous section of drilling hole and the length of the designed reinforcing section; the depth of the position a is 24-26% of the length of the existing pile, and the depth of the end hole position is 0.9-1.1 times of the length of the existing pile. According to the grouting reinforcement method, grout can be prevented from moving upwards, pile foundation reinforcement is more sufficient, and the pile foundation bearing capacity after grouting can be obtained accurately.
本发明涉及既有桩基加固工程和注浆工程技术领域，具体涉及一种既有桩基分段式注浆加固方法。在既有桩周围的土层布置钻孔位置，在钻孔位置采用一级钻孔开孔到a处，安装一级孔口管，并注浆封固；然后分段式注浆直至完成终孔位置的注浆；分段式注浆中，每段注浆的过程为：进行二级钻孔，放入注浆管并注浆封固，在注浆管中钻孔，注浆加固；二级钻孔的深度为前一段钻孔长度与设计加固段长度之和；a处位置的深度为既有桩长度的24～26％，终孔位置的深度为既有桩长度的0.9～1.1倍。本发明的注浆加固方法能够防止浆液上返、使桩基加固更加充分，且能较精确的得到注浆后的桩基承载力。
Sectional type grouting reinforcement method for existing pile foundation
一种既有桩基分段式注浆加固方法
WANG ZHE (author) / LI ZHAOFENG (author) / YU JIANQUAN (author) / LIN CHUNJIN (author) / WANG WEI (author) / ZHANG MING (author) / ZHAO JUN (author) / LIU BIN (author) / LIU DEZHOU (author)
2022-02-11
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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