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A platform for research: civil engineering, architecture and urbanism
Foundation soft interlayer reinforcing method combined with pile foundation construction
The invention discloses a foundation soft interlayer reinforcing method combined with pile foundation construction, which is characterized in that in the construction process of a cast-in-place pile, three PVC (polyvinyl chloride) pipes are uniformly bound on a reinforcement cage, the bottoms of the pipes are plugged by rubber plugs, two days after the pile construction is completed, grouting holes are drilled along the PVC pipes by a geological drilling machine, and the grouting holes are communicated with the PVC pipes; after the depth of the grouting holes penetrating through the soft interlayer on the lower portion of the hard interlayer into the hard layer meets the requirement, reinforcement is conducted through the sleeve valve pipe cloth bag grouting technology, a cloth bag expands in a gourd shape under the action of grouting pressure, surrounding soil is compacted in the process, redundant water and air in the soft interlayer are discharged, and the effect of reinforcing the soft interlayer is achieved; the outer grouting pipe is a steel pipe with the steel thickness not smaller than 5 mm, after cloth bag grouting construction is completed, the part above the pile bottom can be dismantled and recycled, the part below the pile bottom is reserved in a cloth bag grouting body, the reinforcement effect on the grouting body is achieved, the three PVC pipes pre-buried in the pile can serve as post-pile grouting pipes, and the grouting effect is good. And the lower sleeve valve pipe cloth bag grouting body and the pile body form a whole.
本发明公开一种与桩基施工相结合的加固基础软夹层的方法，其特点在于，灌注桩施工过程中，在钢筋笼上均匀绑扎三根PVC管，管底用橡胶堵头封堵，桩施工完成两天后，利用地质钻机沿PVC管钻设注浆孔，注浆孔穿透硬夹层下部软夹层入硬层深度满足要求后，再利用袖阀管布袋注浆工艺进行加固，布袋在注浆压力的作用下呈现葫芦形膨胀，过程中挤密周围土体，排出软夹层内多余的水分和空气，以起到加固软夹层的效果，注浆外管采用钢厚度不小于5mm的钢管，布袋注浆施工完成后，桩底以上部分能够拆除回收再利用，桩底以下部分保留在布袋注浆体中，对注浆体起到加筋的作用，预埋在桩内的三根PVC管能作为桩后压浆注浆管，使下部袖阀管布袋注浆体与桩体形成一个整体。
Foundation soft interlayer reinforcing method combined with pile foundation construction
The invention discloses a foundation soft interlayer reinforcing method combined with pile foundation construction, which is characterized in that in the construction process of a cast-in-place pile, three PVC (polyvinyl chloride) pipes are uniformly bound on a reinforcement cage, the bottoms of the pipes are plugged by rubber plugs, two days after the pile construction is completed, grouting holes are drilled along the PVC pipes by a geological drilling machine, and the grouting holes are communicated with the PVC pipes; after the depth of the grouting holes penetrating through the soft interlayer on the lower portion of the hard interlayer into the hard layer meets the requirement, reinforcement is conducted through the sleeve valve pipe cloth bag grouting technology, a cloth bag expands in a gourd shape under the action of grouting pressure, surrounding soil is compacted in the process, redundant water and air in the soft interlayer are discharged, and the effect of reinforcing the soft interlayer is achieved; the outer grouting pipe is a steel pipe with the steel thickness not smaller than 5 mm, after cloth bag grouting construction is completed, the part above the pile bottom can be dismantled and recycled, the part below the pile bottom is reserved in a cloth bag grouting body, the reinforcement effect on the grouting body is achieved, the three PVC pipes pre-buried in the pile can serve as post-pile grouting pipes, and the grouting effect is good. And the lower sleeve valve pipe cloth bag grouting body and the pile body form a whole.
本发明公开一种与桩基施工相结合的加固基础软夹层的方法，其特点在于，灌注桩施工过程中，在钢筋笼上均匀绑扎三根PVC管，管底用橡胶堵头封堵，桩施工完成两天后，利用地质钻机沿PVC管钻设注浆孔，注浆孔穿透硬夹层下部软夹层入硬层深度满足要求后，再利用袖阀管布袋注浆工艺进行加固，布袋在注浆压力的作用下呈现葫芦形膨胀，过程中挤密周围土体，排出软夹层内多余的水分和空气，以起到加固软夹层的效果，注浆外管采用钢厚度不小于5mm的钢管，布袋注浆施工完成后，桩底以上部分能够拆除回收再利用，桩底以下部分保留在布袋注浆体中，对注浆体起到加筋的作用，预埋在桩内的三根PVC管能作为桩后压浆注浆管，使下部袖阀管布袋注浆体与桩体形成一个整体。
Foundation soft interlayer reinforcing method combined with pile foundation construction
一种与桩基施工相结合的加固基础软夹层的方法
WU TAO (author) / KANG ZENGZHU (author) / LI KAI (author) / SONG JIE (author) / LIU GUANGLEI (author) / WU SIYU (author)
2022-11-08
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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