工程地质学报
工程地質學報
공정지질학보
2014年
5期
824-831
,共8页
翟才雅%李安龙%刘涛%苏宇
翟纔雅%李安龍%劉濤%囌宇
적재아%리안룡%류도%소우
花岗岩地区%地铁隧道%钻爆法%振动传播规律
花崗巖地區%地鐵隧道%鑽爆法%振動傳播規律
화강암지구%지철수도%찬폭법%진동전파규률
Granite areas%Subway tunnel%Drill and blast method%Vibration propagation
青岛为典型花岗岩地区，地铁隧道开挖采用钻爆法。本文首先采用现场实测与统计分析的方法分析了青岛地铁3号线3个工点的隧道爆破监测数据，较为系统地研究了钻爆法施工条件下地表及邻近构筑物的最大振速、主频分布与爆破参数的相关关系，采用线性回归法拟合出包含上述因素的经验公式。采用数值模拟手段，模拟爆破条件下地表及临近建筑物的振动的响应，并将模拟结果与实测数据进行对比，研究主要结论如下：（1）最大振速随比例距离基本呈指数的形式衰减，随着比例距离的增加，最大振速值逐渐减小；（2）爆破引起的振动主频随比例距离分布较为随机，无法建立两者之间的数学模型，主频多在20～70Hz范围内；（3）建筑物内部中三矢量方向上的最大振速均随着楼层的增高呈一定的增加趋势，建筑物外部的地表振速要大于内部质点的速度。
青島為典型花崗巖地區，地鐵隧道開挖採用鑽爆法。本文首先採用現場實測與統計分析的方法分析瞭青島地鐵3號線3箇工點的隧道爆破鑑測數據，較為繫統地研究瞭鑽爆法施工條件下地錶及鄰近構築物的最大振速、主頻分佈與爆破參數的相關關繫，採用線性迴歸法擬閤齣包含上述因素的經驗公式。採用數值模擬手段，模擬爆破條件下地錶及臨近建築物的振動的響應，併將模擬結果與實測數據進行對比，研究主要結論如下：（1）最大振速隨比例距離基本呈指數的形式衰減，隨著比例距離的增加，最大振速值逐漸減小；（2）爆破引起的振動主頻隨比例距離分佈較為隨機，無法建立兩者之間的數學模型，主頻多在20～70Hz範圍內；（3）建築物內部中三矢量方嚮上的最大振速均隨著樓層的增高呈一定的增加趨勢，建築物外部的地錶振速要大于內部質點的速度。
청도위전형화강암지구，지철수도개알채용찬폭법。본문수선채용현장실측여통계분석적방법분석료청도지철3호선3개공점적수도폭파감측수거，교위계통지연구료찬폭법시공조건하지표급린근구축물적최대진속、주빈분포여폭파삼수적상관관계，채용선성회귀법의합출포함상술인소적경험공식。채용수치모의수단，모의폭파조건하지표급림근건축물적진동적향응，병장모의결과여실측수거진행대비，연구주요결론여하：（1）최대진속수비례거리기본정지수적형식쇠감，수착비례거리적증가，최대진속치축점감소；（2）폭파인기적진동주빈수비례거리분포교위수궤，무법건립량자지간적수학모형，주빈다재20～70Hz범위내；（3）건축물내부중삼시량방향상적최대진속균수착루층적증고정일정적증가추세，건축물외부적지표진속요대우내부질점적속도。
Qingdao is the typical granite region,which uses the drill and blast method to the excavate tunnel. Firstly,the article analyzes the measured blasting data of 3 work site which belong to Qingdao Metro Line 3 using field measurement and statistical analysis.The correlation between vibration velocity of surface and neighboring buildings and the frequency characteristics caused by blasting of blasting distance and dose were researched.The empirical formula including the above factors was concluded by regression analysis.The numerical modeling method was used to research the influence of blast to surface and neighboring buildings,and the simulate particle vibration data was compared with the measured by numerical simulation.The main conclusions are as follows:(1 )with the increase of blasting distance,the maximum vibration velocity of surface particle decreases in the form of index attenuation.(2)the vibration frequency caused by blasting is distributing randomly with scaled distance,therefore it is unable to establish the mathematical model between them,and the dominant frequency mostly ranges from 20 to 70 Hz.(3)with the stories increase,the maximum vibration velocity of three-vectors has the magnifying trend.The maximum vibration velocity of the particle inside the building is generally less than the particle closing to the building exterior surface.
