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基坑樁錨設(shè)計(jì)計(jì)算過程(手算)(編輯修改稿)

2025-07-26 23:22 本頁面
 

【文章內(nèi)容簡介】 mn=則嵌固深度, t=+=.入土深度增大系數(shù)r0=即,樁的嵌固深度,t39。=r0t==五)樁身最大彎矩計(jì)算:)第一步開挖 。pp1坑底=2c1kp1==pp1下=r1h39。kp1+2c1kp1= ()+=pa1下=(r1h1+q)ka12c1ka1 =(+20)=EP=pp1坑底+pp1下2 x h39。=(+)Ea1=(pa1上 2+pa1下2 ) x h1=)設(shè)u點(diǎn)剪力為0,點(diǎn)u到此步開挖基坑底的距離為hu.ppu下=r1hukp1+2c1kp1= +=+EP1u=pp1坑底+ppu下2 x hu=(+) hu/2pau下=[r1(hu+h坑底)+q)ka12c1ka1=[(hu+)+20]=+12huEa1u=(pa1上 2+pau下2 )(hu+h坑底z0)=(+12hu)( hu+)/2因o點(diǎn)處剪力為0,即有,EP1u=Ea1u解得,hu=有,pau下=[r1(hu+h坑底)+q)ka12c1ka1=+12hu=37kpa.ppu下=r1hukp1+2c1kp1=+=.EP1u=Ea1u=hau=13(hu+h坑底z0)hpu=2pp1上+ppu下3(pp1上+ppu下)huhau= (+)/3=hpu=(+)/3(+)=M=Ea1uhauEP1uhpu=()=.六),可知開挖面上下各有一個(gè)剪力零點(diǎn),設(shè)其為Q,R,, y。) pa1Q下=[r1(h開挖x )+q]ka12c1ka1 =[()+20]=Ea1Q=(pa1上 2+pa1Q下2 ) x (h開挖xz0)Ea1Q=()()/2使得,Ea1Q=T1即,解得x=又,haQ=13(h開挖xz0)=Q點(diǎn)彎矩可計(jì)算MQ=T1h開挖d1xEa1QhaQ=[()]=.) pp1R上=2c1kp1==.pp1R下=r1ykp1+2c1kp1=+=+EP=pp1R上+pp1R下2 yEP1R=(++)y/2=(+)ypa1R下=r1h開挖+y+qka12c1ka1=[(+y)+20]=+12yEa1R=Pa1R下2(h開挖+yZ0)Ea1R=(+12y)(+)/2使得,Ea1R=T1+EP1R即解得,y=pp1R上=pp1R下=Ea1R=EP1R==haR=13(h開挖+yz0)=(+)/3=3mhpR=2pp1R上+pp1R下3(pp1R上+pp1R下)hRhpR=+(+)=hTR=(h開挖+yd1)=R點(diǎn)處彎矩,MR=T1hTR+EP1Rhp1REa1RhaR=+=七),知在開挖基坑面上下各有一個(gè)剪力為0的點(diǎn)。因,p下a1坑=(r1h基底+q)ka12c1ka1 =(+20)=ha坑=13(h基底z0)=()/3=Ea1坑底=Pa1坑下2(h基底Z0)=Ea1坑底T1+T2即,在該基坑底面與第二排錨桿之間存在剪力為0 的點(diǎn),設(shè)為U,該點(diǎn)到基坑底面的距離為x。pa1U下=[r1(h基底x )+q]ka12c1ka1 =[()+20]=E
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