A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Auxiliary hole-forming construction method for cast-in-situ bored pile
The invention discloses an auxiliary hole-forming construction method for a cast-in-situ bored pile. The auxiliary hole-forming construction method comprises the following steps that drilling operation is conducted; lifting the drill rod; inserting a protective tube; lifting the follow pipe; drilling is conducted repeatedly; a grouting pipe is inserted; high-pressure grouting is conducted, specifically, the grouting influence ranges of every two adjacent grout reinforced composite soil layers form an occlusion range; and pile foundation construction, wherein the outer contour line of the pile foundation and the grouting influence range of the grout reinforced composite soil layer form a pile foundation invasion range. The method has the beneficial effects that under the geological condition of a huge thick sand layer, composite reinforcement is conducted on the soil body within a certain range around the drilled hole, the grouting influence ranges of every two adjacent grouting holes are engaged, the grouting holes radially intrude into a certain range of a pile foundation, and after the soil body around the pile is reinforced through high-pressure rotary jet grouting, the grouting effect is good. A closed and stable circular curtain with certain strength is formed around the pile foundation, and under the protection effect of the circular curtain, the safety and stability of the hole wall and no hole collapse can be guaranteed during rotary excavating construction of the pile foundation.
本申请公开了一种钻孔灌注桩辅助成孔施工方法，包括如下步骤：钻孔作业；提拔钻杆；插入护管；提拔跟管；重复钻孔；插入注浆管；高压注浆：相邻两浆液加固复合土层的注浆影响范围形成咬合范围；桩基施工：桩基外轮廓线与浆液加固复合土层的注浆影响范围形成侵入桩基范围。本申请的有益效果：在巨厚砂层地质条件下，对钻孔周边一定范围的土体进行复合加固，相邻两个注浆孔的注浆影响范围形成咬合，且径向侵入桩基一定范围，桩周土体经过高压旋喷注浆加固后，桩基周围形成闭合的、具有一定强度且稳固的圆形帷幕，在此圆形帷幕的保护作用下，能保障桩基旋挖施工时孔壁安全稳固、不塌孔。
Auxiliary hole-forming construction method for cast-in-situ bored pile
The invention discloses an auxiliary hole-forming construction method for a cast-in-situ bored pile. The auxiliary hole-forming construction method comprises the following steps that drilling operation is conducted; lifting the drill rod; inserting a protective tube; lifting the follow pipe; drilling is conducted repeatedly; a grouting pipe is inserted; high-pressure grouting is conducted, specifically, the grouting influence ranges of every two adjacent grout reinforced composite soil layers form an occlusion range; and pile foundation construction, wherein the outer contour line of the pile foundation and the grouting influence range of the grout reinforced composite soil layer form a pile foundation invasion range. The method has the beneficial effects that under the geological condition of a huge thick sand layer, composite reinforcement is conducted on the soil body within a certain range around the drilled hole, the grouting influence ranges of every two adjacent grouting holes are engaged, the grouting holes radially intrude into a certain range of a pile foundation, and after the soil body around the pile is reinforced through high-pressure rotary jet grouting, the grouting effect is good. A closed and stable circular curtain with certain strength is formed around the pile foundation, and under the protection effect of the circular curtain, the safety and stability of the hole wall and no hole collapse can be guaranteed during rotary excavating construction of the pile foundation.
本申请公开了一种钻孔灌注桩辅助成孔施工方法，包括如下步骤：钻孔作业；提拔钻杆；插入护管；提拔跟管；重复钻孔；插入注浆管；高压注浆：相邻两浆液加固复合土层的注浆影响范围形成咬合范围；桩基施工：桩基外轮廓线与浆液加固复合土层的注浆影响范围形成侵入桩基范围。本申请的有益效果：在巨厚砂层地质条件下，对钻孔周边一定范围的土体进行复合加固，相邻两个注浆孔的注浆影响范围形成咬合，且径向侵入桩基一定范围，桩周土体经过高压旋喷注浆加固后，桩基周围形成闭合的、具有一定强度且稳固的圆形帷幕，在此圆形帷幕的保护作用下，能保障桩基旋挖施工时孔壁安全稳固、不塌孔。
Auxiliary hole-forming construction method for cast-in-situ bored pile
一种钻孔灌注桩辅助成孔施工方法
ZHU XIANGYONG (author) / TIAN HUANXIANG (author) / LIAO YUE (author) / TANG XI (author) / LIAO YU (author) / WU YONGKE (author) / WANG DONGMEI (author) / ZHANG QUAN (author)
2024-09-17
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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