灌注桩自动控制检测仪器的设计与应用  

Design and Application of Automatic Control and Detection Instrument for Cast-in-situ Bored Pile

作　　者：王海林[1] 程帅奇 陈士通[1] 

机构地区：[1]石家庄铁道大学河北省交通应急保障工程技术研究中心,石家庄050043

出　　处：《铁道标准设计》2017年第8期79-83,共5页Railway Standard Design

基　　金：国家重点研发计划(2016YFC0802207)

摘　　要：针对灌注桩施工质量及钻孔内泥浆浓度无法实时监控的问题,根据钻孔内泥浆浓度、沉渣厚度及混凝土对应变片产生不同的侧向压力而提出一种新型仪器,旨在实现对灌注桩从钻机成孔到混凝土灌注各个施工过程中的可视化检测;并为钻孔过程中,针对泥浆提供一种自动控制与检测设备,即实现了自动控制制浆、送浆、关停泥浆泵、检测泥浆浓度的一套自动化设备。研究结论:(1)随时检测成孔过程中护筒内泥浆的高度和浓度,并视情况自动控制送浆泵的开停;(2)实现对钻孔内任一层泥浆浓度及沉渣厚度的检测,可有效提醒何时达到灌注要求;(3)在灌注混凝土过程中,通过自动检测钻孔内的灌注高度,实现对拔导管根数、混凝土灌注量及抽浆泵开停的控制;(4)实现对孔径、孔中孔洞和人防位置等孔内情况的检测及对钻机钻头磨损情况的控制;(5)本研究成果可为灌注桩检测提供一种可视化方法。In view of the fact that the construction quality of bored pile and mud concentration in drilling can not be monitored in real time,and based on the different lateral pressure of strain gauge arising from the mud concentration in drilling,the sediment thickness and the concrete,this paper puts forward a new type of instrument to realize the visual inspection of bored pile in each construction process from hole drilling to concrete filling,and provides an automatic equipment for control and inspection of slurry during the process of drilling,which fulfills auto-control of slurry making,slurry transporting,mud pump switching and mud concentration detecting. Research conclusions：（ 1） controlling the start and stop of the feeding pump accordingly while monitoring the height and concentration of slurry in real-time during the process of drilling;（ 2） detecting mud concentration and thickness of sediment in borehole of any layer and alarming when drilling perfusion is satisfied;（ 3） during the process of concrete pouring,controlling the number of catheter pulled,concrete volume and start or stop of pump based on automatic detection of drilling perfusion height;（4） detecting bore diameter,hole and position of civil air defense and controlling drill bit wear condition;（5） the results of this study can provide a visual method for the detection of bored pile.

关 键 词：钻孔灌注桩 质量控制 设计理论 施工技术 检测 

分 类 号：U443.154[建筑科学—桥梁与隧道工程]