加筋挡土墙设计说明

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1、加筋土挡土墙设计说明哈尔滨工业大学·评语：成绩：签名：年月日目录第1章设计资料1第2章筋带受力计算1第3章内部稳定性验算3第4章外部稳定验算5加筋挡土墙设计说明1.结构尺寸设计设计各项计算资料汇列如下：(1)挡土墙不受浸水影响，墙高H=10m，顶部填土0.6m，基础埋深2m；(2)路基宽24.5m，路面宽18m；(3)荷载标准：公路一级；(4)面板规格：，十字形混凝土板，板厚20cm，混凝土强度等级C20。(5)筋带采用聚丙烯土工带，带宽为18mm，厚2.0mm，容许拉应力，摩擦系数f=0.4；(6)筋带节点间距：；(7)填料：砂性土，重度，内摩擦角，粘聚力；(8)地基：砂性

2、土，重度，内摩擦角，粘聚力，地基承载力标准值；(9)墙体采用矩形断面，加筋体宽为10.0m；(10)墙顶填料与加筋土填料相同，横坡为6%，摩阻系数为。2.筋带受力计算(1)计算加筋体上填土重力换算为等代均布土层厚度：已知，等代均布土层厚度计算如下：，故取。（2）计算车辆荷载换算成等代均布土层：墙高时，。则，。(3)筋带受拉计算：筋带受拉拉力包括三个部分：车辆荷载，墙顶路堤填土和墙后填料引起的筋带拉力。其中：静止土压力系数：；主动土压力系数：；当时，；当时，；bc=0.9m。筋带编号hi(m)kiLci(m)Lc(m)σai(kpa)γ1hi(kpa)γ2h2(kpa)Sx(m

3、)Sy(m)Ti(KN)10.20.4725.824.59.504220.420.42.8020.60.4526.2524.59.3312220.420.43.29310.4426.4524.59.2620220.420.43.7841.40.4326.6524.59.1928220.420.44.2451.80.4126.8524.59.1236220.420.44.6762.20.4027.0524.59.0644220.420.45.0672.60.3927.2524.58.9952220.420.45.42830.3827.4524.58.9360220.420.45

4、.7593.40.3627.6524.58.8668220.420.46.05103.80.3527.8524.58.8076220.420.46.31114.20.3428.0524.58.7384220.420.46.54124.60.3328.2524.58.6792220.420.46.731350.3128.4524.58.61100220.420.46.89145.40.3028.6524.58.55108220.420.47.02155.80.2928.8524.58.49116220.420.47.12166.20.3129.0524.58.43124220.

5、420.47.97176.60.3129.2524.58.38132220.420.48.371870.3129.4524.58.32140220.420.48.78197.40.3129.6524.58.26148220.420.49.19207.80.3129.8524.58.21156220.420.49.60218.20.3130.0524.58.15164220.420.410.01228.60.3130.2524.58.10172220.420.410.422390.3130.4524.58.05180220.420.410.83249.40.3130.6524.

6、57.99188220.420.411.24259.80.3130.8524.57.94196220.420.411.653.内部稳定性验算(1)已知筋带断裂强度标准值，抗拉容许应力，拉筋容许应力提高系数，筋带厚度为2mm，利用容许应力法计算结果见下表：筋带编号Ti(KN)需要筋带面积mm2选取根数安全系数12.8056.0031.9323.2965.8031.6433.7875.6052.3844.2484.8052.1254.6793.4051.9365.06101.2051.7875.42108.4051.6685.75115.0051.5796.05121.0051.

7、49106.31126.2051.43116.54130.8051.38126.73134.6051.34136.89137.8051.31147.02140.4051.28157.12142.4051.26167.97159.4071.58178.37167.4071.51188.78175.6071.44199.19183.8071.37209.60192.0071.312110.01200.2081.442210.42208.4081.382310.83216.60101.662411.24224