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A platform for research: civil engineering, architecture and urbanism
Cast-in-situ bored pile construction method for sandy gravel riverbed dam construction
The invention relates to the field of water conservancy and hydropower engineering, in particular to a cast-in-situ bored pile construction method for sandy gravel riverbed dam construction. The cast-in-situ bored pile construction method comprises the following steps of performing consolidation grouting: drilling a plurality of consolidation holes in dam foundations on two banks, and grouting the consolidation holes; performing high-pressure jet grouting: drilling a single row of grouting holes in the designated position of a riverbed, and performing high-pressure jet grouting on the grouting holes; performing curtain grouting: drilling a single row of curtain holes in the designated position of the upstream of the dam foundations after consolidation grouting and high-pressure jet grouting are completed, and grouting the curtain holes; punching a cast-in-place pile: drilling a plurality of punched holes in the designated positions of the dam foundations, and then putting steel bar limiting cages in the punched holes, wherein a plurality of hook claws are hinged to the steel bar limiting cages, and the hook claws are embedded in the hole walls of the punched holes; and arranging driving pieces for driving the plurality of hook claws to turn over on the steel bar limiting cages, and grouting the punched holes after the hook claws are embedded in the hole walls of the punched holes so as to form a pile foundation. The cast-in-situ bored pile construction method has the effect of improving the subsequent settlement problem of a dam.
本申请涉及水利水电工程的领域，尤其是涉及一种用于砂卵石河床建坝的钻孔灌注桩施工方法，其包括以下步骤，固结灌浆：两岸坝基钻设多个固结孔，向固结孔灌浆；高压旋喷灌浆：在河床位于指定位置钻设单排灌浆孔，向灌浆孔进行高压旋喷灌浆；帷幕灌浆：在固结灌浆和高压旋喷灌浆完成后，在坝基上游指定位置处钻设单排帷幕孔，向帷幕孔灌浆；冲孔灌注桩：在坝段基础位于指定位置钻设多个冲孔，而后向冲孔内放入钢筋限位笼，钢筋限位笼铰接有多个钩爪，钩爪用于嵌设于冲孔的孔壁；钢筋限位笼设置有驱使多个钩爪翻转的驱动件，在钩爪嵌入冲孔的孔壁后，再往冲孔灌浆，形成桩基础。本申请具有改善大坝后续沉降问题的效果。
Cast-in-situ bored pile construction method for sandy gravel riverbed dam construction
The invention relates to the field of water conservancy and hydropower engineering, in particular to a cast-in-situ bored pile construction method for sandy gravel riverbed dam construction. The cast-in-situ bored pile construction method comprises the following steps of performing consolidation grouting: drilling a plurality of consolidation holes in dam foundations on two banks, and grouting the consolidation holes; performing high-pressure jet grouting: drilling a single row of grouting holes in the designated position of a riverbed, and performing high-pressure jet grouting on the grouting holes; performing curtain grouting: drilling a single row of curtain holes in the designated position of the upstream of the dam foundations after consolidation grouting and high-pressure jet grouting are completed, and grouting the curtain holes; punching a cast-in-place pile: drilling a plurality of punched holes in the designated positions of the dam foundations, and then putting steel bar limiting cages in the punched holes, wherein a plurality of hook claws are hinged to the steel bar limiting cages, and the hook claws are embedded in the hole walls of the punched holes; and arranging driving pieces for driving the plurality of hook claws to turn over on the steel bar limiting cages, and grouting the punched holes after the hook claws are embedded in the hole walls of the punched holes so as to form a pile foundation. The cast-in-situ bored pile construction method has the effect of improving the subsequent settlement problem of a dam.
本申请涉及水利水电工程的领域，尤其是涉及一种用于砂卵石河床建坝的钻孔灌注桩施工方法，其包括以下步骤，固结灌浆：两岸坝基钻设多个固结孔，向固结孔灌浆；高压旋喷灌浆：在河床位于指定位置钻设单排灌浆孔，向灌浆孔进行高压旋喷灌浆；帷幕灌浆：在固结灌浆和高压旋喷灌浆完成后，在坝基上游指定位置处钻设单排帷幕孔，向帷幕孔灌浆；冲孔灌注桩：在坝段基础位于指定位置钻设多个冲孔，而后向冲孔内放入钢筋限位笼，钢筋限位笼铰接有多个钩爪，钩爪用于嵌设于冲孔的孔壁；钢筋限位笼设置有驱使多个钩爪翻转的驱动件，在钩爪嵌入冲孔的孔壁后，再往冲孔灌浆，形成桩基础。本申请具有改善大坝后续沉降问题的效果。
Cast-in-situ bored pile construction method for sandy gravel riverbed dam construction
用于砂卵石河床建坝的钻孔灌注桩施工方法
ZHANG ZHIGANG (author) / DONG GUOCONG (author) / ZENG BAOZHEN (author)
2022-01-18
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
Construction method of cast-in-situ bored pile for water-rich sandy stratum
| European Patent Office | 2021