墙背上的土压力为被动压力

1、挡土墙挡土墙内支撑内支撑钻孔灌注桩挡土钻孔灌注桩挡土墙墙加筋挡土墙加筋挡土墙20021hke 45o- /2 z x=k0 zpp压缩压缩 pa伸展伸展45o+ /2 f =c tan f oc)245tan(2)245(tan213 caaaakczk 2 )2/45(tan2 akaazk aakhe221 2/45 akcz 20 222221ckchkheaaa )245tan(2)245(tan2 czppppkczk 2 )2/45(tan2 pkpppkchkhe2212 ppppkchkkchkh266 ppkhe221 2/45 2/45 aaakckqz 2)( pppkc

2、kqz 2)( 无限均布超载的影响无限均布超载的影响（无粘性土）（无粘性土） 距挡土墙一定距离均距挡土墙一定距离均布超载的影响布超载的影响（无粘性土）（无粘性土） =45+ / 2 1h1ka1 1h1ka2 mjjwmjjjniiiawazhhhkk111 )cos(coscos qh)sin()sin(sin)sin()sin()sin(2rrak 49. 0)22045(tan)245(tan22 akm59. 1)2/2045tan(1810220 akcz kpa1 .307 . 010249. 05182| aahzakchk m/kn3 .51)59. 15(1 .3021)(2

3、10 zheaa m14. 1)59. 15(31 283. 0)2/3445(tan2 akm/kn8 .1136)1 .3583. 2(21)(2121 heaaa m15. 28 .1133626)83. 21 .35(3683. 2 kpa4 .10)23245(tan217)245(tan212111 hakpa2 . 4)21645tan(102)21645(tan217)245tan(2)245(tan22222111 chakpa6 .36)21645tan(102)21645(tan319217)245tan(2)245(tan2222222112 ）（）（ chham/kn

4、6 .713)6 .362 . 4(2124 .1021 ae 最复杂的情况？最复杂的情况？)sin()sin()(180sin)sin( we)sin()sin( weaakhhe2222221)cos()cos()sin()sin(1)cos(cos)(cos21 = 90 - - 222)cos()cos()sin()sin(1)cos(cos)(cos akppkhe221 222)cos()cos()sin()sin(1)cos(cos)(cos pkm/kn1 .63438. 0418212122 aakhe hcd tanarctan 21012222cos)sin(cos)si

5、n(sincos2)sin()sin()cos()cos(coscos)cos(ggkkkkkqa )sin(1coscos2)cos(coscos)1(2)1()cos(2)cos(sin)2()2(21cos10020102002020 chhhhckhhhckqhhhkqhhhhqkq )cos(coscoscos)cos()sin(0121 kkkkgq cos)sin()cos(22kkgq 21222coscossin2)sin()sin()sin()sin(sinsin)sin(ggkkqa )sin(cossin21 hqkqhc 2 cossin)sin()sin(1 qkg

6、 cossin)sin()sin(2 qkgacbea o o最危险滑最危险滑动面动面00221bhhbhea qh 0 0000213bhhbbhhc222)cos()cos()sin()sin(1)cos(cos)(cos 墙顶墙顶墙基墙基墙趾墙趾墙面墙面墙背墙背墙趾墙趾墙踵墙踵立壁立壁钢筋钢筋墙趾墙趾墙踵墙踵扶壁扶壁墙板墙板锚定板锚定板基岩基岩锚杆锚杆6 . 10 faxfaztzexegxk)cos( aazee)sin( aaxee cotzbxf 0tan bzzf zfeaeazeaxg 0 ox0 xfbz3 . 1)( tatannsgeegk 0cos ggn )cos(0

7、 aaneeeaeaneat ggngt 0o0sin ggt )sin(0 aateee1 1e2 2e3 3泄水孔泄水孔坡底坡底 坡脚坡脚坡角坡角坡高坡高滑动面滑动面坡肩坡肩坡面坡面ttfnwmwcos wsin ntan tantan ttkfs tantan satfsttkwttfn481. 0tantan sk 241. 0tantan ssatk 7 .25 5 .13 渗流作用的土坡比无渗流作用渗流作用的土坡比无渗流作用的土坡稳定时的坡角要小得多的土坡稳定时的坡角要小得多 wttfnjrlmfr xwms xwrlmmkfsrs 如何如何计算？计算？xwrlcmmkusrs =

8、 0时时 i iabcdiabhocrcdbalixieixi+1ei+1nitiwi12nhibiiiiiiiwtwn sincos ， iiiswtt siniiiiiiiiiifwlclct tancos)tan( )tancos(iiiiiiffwlctt iiiiiiiiiiiiiiiiiisfsfsbhbhlcwwlcttrtrtk sin)tancos(sin)tancos(10siniribrxii iiiiiisfshhblcttk sin)tancos/(0 0.601.802.853.754.103.051.501 1 1 1 1 1 1.1511.1633.4853.0

9、169.7576.2656.7327.9011.0 32.1 48.5 59.4158.3336.6212.671 2 3 4 5 6 7编号编号 中心高度中心高度(m) 条宽条宽(m) 重重wi(kn/m) i(o) w isin i 9.5 16.523.831.640.149.863.0w icos i 1.84 9.51 21.3936.5549.1243.3324.86合计合计186.60258.63 cl=165.5kn/mk=1.18 iiwiiiiiiiiiisdiabhrbhlcrk sin)tancos( iiiiiiiiiiiiiisbhhhbhhhlck sin)(tancos)(32sat1321bihi1hi2hi3hibihi1hi2hi3hi iiiiiiiiiswmbcbuwk sin1tan)(siiiikm tansincos )tansin(cossintan)( iiiiiiiiiiswbcbuwkhcn = 25 20 15 10 5 90 60 30 0 0 2 4 6 8 10 12 ns = 5.52 iiiiiiiiiiisxwmluxwbck tan)(cos1tan)(siiiikm tansincosisiiiiitxw