Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Retreating type intermittent control pre-grouting construction method for super-large and super-deep karst cave pile foundation in karst area
The invention relates to the technical field of karst area karst cave reinforcement treatment, and provides a karst area ultra-large and ultra-deep karst cave pile foundation retreating type intermittent control pre-grouting construction method which comprises the following steps: S1, measuring and setting out a cast-in-place pile pore-forming hole site center; s2, a geological drilling machine is used for drilling a plurality of circles of edge detection holes with the center of the cast-in-place pile pore-forming hole site as the circle center for sampling and edge detection; when the boundary of the karst cave is still not determined after the diameter change of the exploring edge reaches a certain distance, stopping exploring the edge; s3, vent holes communicating with the karst cave are formed beside the exploring edge holes through a drilling machine; s4, a grouting pipe is installed and constructed; S5, a grouting pump injects mortar into the karst cave through the grouting pipe; grouting is paused every time after grouting is conducted for a certain time, and grouting is conducted again after the grouting pipe is lifted upwards; and S6, the steps S4-S5 are repeated till backward intermittent grouting construction is conducted into the karst cave through all the exploring side holes. The method has the effect of reducing the karst cave reinforcement cost on the premise that the cast-in-place pile hole forming conditions are met.
本申请涉及岩溶区溶洞加固处理的技术领域，提出了一种岩溶区超大超深溶洞桩基后退式间歇控制预注浆施工方法，包括以下步骤：S1：灌注桩成孔孔位中心测量放样；S2：通过地质钻机以灌注桩成孔孔位中心为圆心，钻设若干圈探边孔进行取样探边；当探边变径达到一定距离后仍未确定溶洞边界时，停止探边；S3：在探边孔旁通过钻机施作与溶洞连通的排气孔；S4：注浆管安装施工：S5：注浆泵通过注浆管往溶洞内注入砂浆；每注入一定时间后暂停注浆，向上提升注浆管后再次进行注浆；S6：重复步骤S4‑S5：直至完成通过所有探边孔往溶洞内进行后退间歇式注浆施工。本申请具有在满足灌注桩成孔条件的前提下，降低溶洞加固成本的效果。
Retreating type intermittent control pre-grouting construction method for super-large and super-deep karst cave pile foundation in karst area
The invention relates to the technical field of karst area karst cave reinforcement treatment, and provides a karst area ultra-large and ultra-deep karst cave pile foundation retreating type intermittent control pre-grouting construction method which comprises the following steps: S1, measuring and setting out a cast-in-place pile pore-forming hole site center; s2, a geological drilling machine is used for drilling a plurality of circles of edge detection holes with the center of the cast-in-place pile pore-forming hole site as the circle center for sampling and edge detection; when the boundary of the karst cave is still not determined after the diameter change of the exploring edge reaches a certain distance, stopping exploring the edge; s3, vent holes communicating with the karst cave are formed beside the exploring edge holes through a drilling machine; s4, a grouting pipe is installed and constructed; S5, a grouting pump injects mortar into the karst cave through the grouting pipe; grouting is paused every time after grouting is conducted for a certain time, and grouting is conducted again after the grouting pipe is lifted upwards; and S6, the steps S4-S5 are repeated till backward intermittent grouting construction is conducted into the karst cave through all the exploring side holes. The method has the effect of reducing the karst cave reinforcement cost on the premise that the cast-in-place pile hole forming conditions are met.
本申请涉及岩溶区溶洞加固处理的技术领域，提出了一种岩溶区超大超深溶洞桩基后退式间歇控制预注浆施工方法，包括以下步骤：S1：灌注桩成孔孔位中心测量放样；S2：通过地质钻机以灌注桩成孔孔位中心为圆心，钻设若干圈探边孔进行取样探边；当探边变径达到一定距离后仍未确定溶洞边界时，停止探边；S3：在探边孔旁通过钻机施作与溶洞连通的排气孔；S4：注浆管安装施工：S5：注浆泵通过注浆管往溶洞内注入砂浆；每注入一定时间后暂停注浆，向上提升注浆管后再次进行注浆；S6：重复步骤S4‑S5：直至完成通过所有探边孔往溶洞内进行后退间歇式注浆施工。本申请具有在满足灌注桩成孔条件的前提下，降低溶洞加固成本的效果。
Retreating type intermittent control pre-grouting construction method for super-large and super-deep karst cave pile foundation in karst area
岩溶区超大超深溶洞桩基后退式间歇控制预注浆施工方法
ZHANG XINMIN (Autor:in) / WANG LIN (Autor:in) / DANG XIANGWEI (Autor:in) / KONG XIAOWANG (Autor:in) / SHEN BAITUN (Autor:in) / LIU PENG (Autor:in) / TIAN JIA (Autor:in) / CAO CE (Autor:in) / YANG YOUPING (Autor:in) / WANG HANWEN (Autor:in)
10.11.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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