山西建筑
山西建築
산서건축
SHANXI ARCHITECTURE
2012年
33期
71-73
,共3页
水射流%开口钢管桩%流场模拟%试验分析
水射流%開口鋼管樁%流場模擬%試驗分析
수사류%개구강관장%류장모의%시험분석
water jet%opening steel pipe piles%flow field simulation%trial analysis
针对大直径、超长钢管桩建设中存在的问题,提出利用水射流技术辅助开展沉桩,理论分析了不同喷嘴的水力参数,并数值模拟喷嘴的流场特性及各喷嘴对岩土体内部应力作用分析,最后选用等变速型喷嘴制作射流喷头,开展射流辅助沉桩实验,结果显示随着射流强度的提高,沉桩需要的锤击次数越小,同时也反映要根据实际沉桩状况及时进行射流排量的调节。
針對大直徑、超長鋼管樁建設中存在的問題,提齣利用水射流技術輔助開展沉樁,理論分析瞭不同噴嘴的水力參數,併數值模擬噴嘴的流場特性及各噴嘴對巖土體內部應力作用分析,最後選用等變速型噴嘴製作射流噴頭,開展射流輔助沉樁實驗,結果顯示隨著射流彊度的提高,沉樁需要的錘擊次數越小,同時也反映要根據實際沉樁狀況及時進行射流排量的調節。
침대대직경、초장강관장건설중존재적문제,제출이용수사류기술보조개전침장,이론분석료불동분취적수력삼수,병수치모의분취적류장특성급각분취대암토체내부응력작용분석,최후선용등변속형분취제작사류분두,개전사류보조침장실험,결과현시수착사류강도적제고,침장수요적추격차수월소,동시야반영요근거실제침장상황급시진행사류배량적조절。
For the problems in the construction of large diameter or long steel pipe piles, water jet technology was in support of the pile driving in the paper. The article analyzed the different nozzle hydraulic parameters in theoretical aspects, and then analyzed flow field of the nozzle and the internal stress of the rock mass with numerical simulation. At last, shift type nozzle to produce jet nozzle, to carry out the experimental jet assisted pile driving. The results showed the jet strength increased, the smaller number of times would the pile driving hammering display. Also it reflected that the jet emission should be regulated in a timely manner according to the actual pile driving conditions.