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A platform for research: civil engineering, architecture and urbanism
Construction method for pile-soil isolation of empty pile section of super-long test pile
The invention discloses a construction method for pile-soil isolation of an empty pile section of a super-long test pile. The construction method comprises the steps of pile position setting, pile casing preparation, outer pile casing sinking, inner pile casing sinking and inner and outer pile casing sealing. The construction method disclosed by the invention is high in construction efficiency, good in quality guarantee and accurate and reliable in data, overcomes the adverse conditions that a large-volume soil body with large basement depth is excavated and needs to be supported and then tested, and improves the result accuracy of reducing friction force by adopting an empirical parameter method for calculation deduction and a high-pressure jet grouting vibroflotation method for dispersing the soil body in the past; the defects that an existing double-sleeve device is complex to manufacture and install and not high in quality guarantee are overcome; according to the method, it is ensured that the friction force of the empty pile section soil of the super-long test pile is effectively eliminated, and accurate bearing capacity value data can be obtained for the test of the super-long test pile.
本发明公开了一种超长试桩空桩段桩土隔离的施工方法，包括桩位放点、准备护筒、外护筒沉设、内护筒沉设以及内、外护筒封闭步骤。本发明施工方法施工效率高、质量保证好、数据准确可靠，克服了开挖地下室深度较大方量土体并需要支护再进行试验的不利条件，提高了以往采用经验参数法计算扣减、高压旋喷振冲法冲散土体从而减小摩擦力的结果准确性，以及避免了现有双套管装置制作、安装复杂、质量保证不高的弊端；本发明确保超长试桩空桩段土体摩擦力有效消除，能够为超长试桩的试验取得较为准确的承载力取值数据。
Construction method for pile-soil isolation of empty pile section of super-long test pile
The invention discloses a construction method for pile-soil isolation of an empty pile section of a super-long test pile. The construction method comprises the steps of pile position setting, pile casing preparation, outer pile casing sinking, inner pile casing sinking and inner and outer pile casing sealing. The construction method disclosed by the invention is high in construction efficiency, good in quality guarantee and accurate and reliable in data, overcomes the adverse conditions that a large-volume soil body with large basement depth is excavated and needs to be supported and then tested, and improves the result accuracy of reducing friction force by adopting an empirical parameter method for calculation deduction and a high-pressure jet grouting vibroflotation method for dispersing the soil body in the past; the defects that an existing double-sleeve device is complex to manufacture and install and not high in quality guarantee are overcome; according to the method, it is ensured that the friction force of the empty pile section soil of the super-long test pile is effectively eliminated, and accurate bearing capacity value data can be obtained for the test of the super-long test pile.
本发明公开了一种超长试桩空桩段桩土隔离的施工方法，包括桩位放点、准备护筒、外护筒沉设、内护筒沉设以及内、外护筒封闭步骤。本发明施工方法施工效率高、质量保证好、数据准确可靠，克服了开挖地下室深度较大方量土体并需要支护再进行试验的不利条件，提高了以往采用经验参数法计算扣减、高压旋喷振冲法冲散土体从而减小摩擦力的结果准确性，以及避免了现有双套管装置制作、安装复杂、质量保证不高的弊端；本发明确保超长试桩空桩段土体摩擦力有效消除，能够为超长试桩的试验取得较为准确的承载力取值数据。
Construction method for pile-soil isolation of empty pile section of super-long test pile
一种超长试桩空桩段桩土隔离的施工方法
WANG CHENG (author) / DONG TIANLEI (author) / HOU JIANWEI (author) / LI JUNLIN (author) / QIN QINGFA (author) / ZHAO ZHENGGAO (author) / XIE ZHIGANG (author) / LEE JEONG-WOONG (author) / ZHOU DEBIAO (author) / LIU XIAOQING (author)
2022-05-13
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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