东方鼎盛国际-复合土钉墙-计算书.doc

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1、东侧2-2剖面双排微型桩+预应力锚杆+土钉墙----------------------------------------------------------------------验算项目:----------------------------------------------------------------------[验算简图]----------------------------------------------------------------------[验算条件]-------------------------------------

2、---------------------------------[基本参数]所依据的规程或方法：《建筑基坑支护技术规程》JGJ120-99基坑深度：9.500(m)基坑内地下水深度：11.300(m)基坑外地下水深度：11.300(m)基坑侧壁重要性系数：1.000土钉荷载分项系数：1.250土钉抗拉抗力分项系数：1.300整体滑动分项系数：1.300[坡线参数]坡线段数3序号水平投影(m)竖向投影(m)倾角(°)1-0.0005.00090.021.2000.0000.031.8004.50068.2[土层参数]土层层数6序号土类型土层厚容重饱和容重粘聚力内摩擦

3、角钉土摩阻力锚杆土摩阻力水土(m)(kN/m^3)(kN/m^3)(kPa)(度)(kPa)(kPa)1粉土3.68019.020.015.021.558.058.0合算2粉土3.62019.318.012.521.562.078.0分算3粘性土1.76019.218.027.011.035.043.0分算4粉土1.96019.618.015.021.858.072.0分算5粘性土3.22019.419.627.011.051.051.0合算6粉土0.92019.419.618.021.755.055.0分算[超载参数]超载数1序号超载类型超载值(kN/m)作用深度

4、(m)作用宽度(m)距坑边线距离(m)形式长度(m)1局部均布20.0000.0004.0003.000条形[土钉参数]土钉道数6序号水平间距(m)垂直间距(m)入射角度(度)钻孔直径(mm)长度(m)配筋11.5001.30010.01009.0001d1821.5001.30010.01009.0001d1831.5001.30010.01009.0001d1841.5002.60010.010011.0001d2051.5001.20010.010011.0001d2061.5001.20010.01007.0001d20[花管参数]基坑内侧花管排数0基坑内侧

5、花管排数2序号横向间距(m)纵向间距(m)入射角度(度)钻孔直径(mm)长度(m)发挥系数抗拉力(kN)1-2.9001.00090.01509.0001.00060.020.7001.00090.01509.0001.00060.0[锚杆参数]锚杆道数1序号水平间距(m)竖向间距(m)入射角度(度)锚固体直径(mm)锚杆长度(m)锚杆锚固长度(m)抗拉力(kN)11.5005.20015.015018.00013.000180.0[坑内土不加固][内部稳定验算条件]考虑地下水作用的计算方法：总应力法土钉拉力在滑面上产生的阻力的折减系数：0.500*********

6、**********************************************************[验算结果]*******************************************************************[局部抗拉验算结果]工况开挖深度破裂角土钉号土钉长度受拉荷载标准值抗拔承载力设计值抗拉承载力设计值满足系数(m)(度)(m)Tjk(kN)Tuj(kN)Tuj(kN)抗拔抗拉11.80044.8023.10044.819.0002.3113.0106.939.21437.09734.40044.819.000

7、0.0103.5106.9999.000999.00029.0003.3115.7106.928.26726.12047.00055.819.0000.0108.3106.9999.000999.00029.0003.3115.7106.928.26926.12039.00018.2125.7106.95.5224.69458.20055.219.0000.096.7106.9999.000999.00029.0003.3104.3106.925.04625.66639.00018.5113.8106.94.9124.612411.00093.3107.1126