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A platform for research: civil engineering, architecture and urbanism
Combined type post-grouting cast-in-situ bored pile construction method adopting double-liquid slurry
The invention discloses a composite post-grouting cast-in-situ bored pile construction method adopting double-liquid slurry, which comprises the following steps of: when a reinforcement cage is manufactured, binding a concrete guide pipe and a grouting pipe on the reinforcement cage, sealing a slurry outlet at the lower part of the grouting pipe, and then putting the grouting pipe into a formed hole together; and after the underwater concrete is poured, grouting can be started when the concrete strength reaches 50% of the design strength. The construction method has the beneficial effects that the Neyton polymer slurry grouting material and the pile end and pile side annular composite grouting pipe are adopted, slurry is injected into the grouting pipe through a composite post-grouting method and sprayed out through the slurry outlet spray head, so that soil bodies, sediment and mud cakes at the pile end and the pile side are effectively reinforced, the bearing capacity of a single pile can be improved, and the construction cost is reduced. And the pile length and the settlement value are reduced, the construction cost can be comprehensively saved by 8%, and the method can flexibly cope with variable construction environments, is particularly suitable for super-long rotary excavating cast-in-place piles, and has remarkable economic benefits.
本发明公开了一种采用双液浆的复合式后注浆钻孔灌注桩施工方法，在制作钢筋笼时，将混凝土导管和注浆管绑扎在钢筋笼上，在注浆管下部出浆口做好密封处理后便可一并下放至成孔内，浇筑完成水下混凝土后待混凝土强度达到设计强度的50％即可开始注浆。本发明的有益效果是：采用“奈普顿聚合物泥浆注浆材料”和“桩端+桩侧环向的复合式注浆管”，使用复合式后注浆法将泥浆分别注入注浆管内，由出浆口喷头喷射出，使得桩端和桩侧土体、沉渣及泥皮均得到有效加固，从而可以提高单桩承载力，减少了桩长和沉降值，综合可以节约8％的工程造价，能够灵活地应对多变的施工环境，尤其针对超长旋挖灌注桩同样适用，具有较为显著的经济效益。
Combined type post-grouting cast-in-situ bored pile construction method adopting double-liquid slurry
The invention discloses a composite post-grouting cast-in-situ bored pile construction method adopting double-liquid slurry, which comprises the following steps of: when a reinforcement cage is manufactured, binding a concrete guide pipe and a grouting pipe on the reinforcement cage, sealing a slurry outlet at the lower part of the grouting pipe, and then putting the grouting pipe into a formed hole together; and after the underwater concrete is poured, grouting can be started when the concrete strength reaches 50% of the design strength. The construction method has the beneficial effects that the Neyton polymer slurry grouting material and the pile end and pile side annular composite grouting pipe are adopted, slurry is injected into the grouting pipe through a composite post-grouting method and sprayed out through the slurry outlet spray head, so that soil bodies, sediment and mud cakes at the pile end and the pile side are effectively reinforced, the bearing capacity of a single pile can be improved, and the construction cost is reduced. And the pile length and the settlement value are reduced, the construction cost can be comprehensively saved by 8%, and the method can flexibly cope with variable construction environments, is particularly suitable for super-long rotary excavating cast-in-place piles, and has remarkable economic benefits.
本发明公开了一种采用双液浆的复合式后注浆钻孔灌注桩施工方法，在制作钢筋笼时，将混凝土导管和注浆管绑扎在钢筋笼上，在注浆管下部出浆口做好密封处理后便可一并下放至成孔内，浇筑完成水下混凝土后待混凝土强度达到设计强度的50％即可开始注浆。本发明的有益效果是：采用“奈普顿聚合物泥浆注浆材料”和“桩端+桩侧环向的复合式注浆管”，使用复合式后注浆法将泥浆分别注入注浆管内，由出浆口喷头喷射出，使得桩端和桩侧土体、沉渣及泥皮均得到有效加固，从而可以提高单桩承载力，减少了桩长和沉降值，综合可以节约8％的工程造价，能够灵活地应对多变的施工环境，尤其针对超长旋挖灌注桩同样适用，具有较为显著的经济效益。
Combined type post-grouting cast-in-situ bored pile construction method adopting double-liquid slurry
一种采用双液浆的复合式后注浆钻孔灌注桩施工方法
GUO JUNHUA (author) / HUANG XIN (author) / XIONG QINGFANG (author) / GUO YIYOU (author) / HU YUCHEN (author) / YUAN LINNA (author) / HU ZHICHUN (author) / HU YUNJIA (author) / QI GUOHE (author) / XU WENQIANG (author)
2024-09-27
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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