c加筋挡土墙设计计算书6m 0.4坡比.doc

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1、MESA加筋挡土墙设计计算书本设计采用美国TET公司土工格栅加筋挡土墙设计软件进行设计计算,充分考虑了结构体的内、外部稳定性及总体稳定性。但未考虑孔隙水压力、地下水位、地震等影响。本设计为初步设计,仅供参考。一、工程名称:6米加筋土挡墙二、设计目标及要求:格栅最小抗拉拔安全系数FSpo1.50格栅有效长期强度抗拉安全系数FSt1.30最小抗直接滑动安全系数FSds1.50设定格栅抗拉拔最小抵抗长度Le1.00m容许偏心比率e/L0.1667设定每层格栅最小长度Lmin0.8h最小总体抗深层滑动安全系数FSg1.30设定每层格栅最小绝对长度Lomin2.50 m最小极限承载力安全系数FSb2.5

2、0挡墙最小埋深d0.00 m三、设计输入参数:图1 设计参数示意图挡墙高度h6.0m承载力因子Nc25.80挡墙埋深d0.0m承载力因子Ng16.72墙面倾角20加筋土粘聚力cr0kPa挡墙顶面坡度0加筋土内摩擦角jr28墙顶均匀附加荷载q20kPa加筋土容重gr19kN/m3挡墙地基土等效粘聚力cf0kPa墙背后回填土粘聚力cb0kPa挡墙地基土等效内摩擦角jf28墙背后回填土摩擦角jb28挡墙地基土等效容重gf19kN/m3墙背后回填土容重gb19kN/m3备注:格栅选用RS50HDPE,有效长期抗拉强度为:19.8kN/m。 挡墙高度、坡比及墙顶荷载承载力因子填料参数取值格栅间距及格栅加

3、筋长度最小值格栅强度取值四、设计输出结果:总体及外部稳定计算结果:土压力系数Kar(内部稳定分析)0.2399土压力系数Kab(外部稳定分析)0.2399梅耶霍夫应力sv97.68kPa(要求地基容许承载力必须大于此值)地基承载安全系数FSb7.62总体抗深层滑动最弱滑动面安全系数FSg1.336(所在滑动面圆心坐标为(-3.60,18.00),半径为18.58m)加筋土壤与地基土壤之间的直接滑动安全系数FSds1.812加筋土壤与地基土壤之间的e/L0.0053(最小抗倾覆安全系数4.86)格栅最不利断裂系数Fs1.331挡墙抗深层滑动面挡墙内部滑动面挡墙基地承载力挡墙偏心距挡墙滑动系数挡墙

4、格栅断裂安全系数挡墙格栅拉拨安全系数格栅布置及计算结果:附:主要相关计算公式1)外部稳定性分析计算: (1) (2)(墙背后回填土推力) (3)(附加荷载推力) (4)(总推力) (5)(公式3水平分力) (6)(公式4水平分力) (7)(公式5水平分力) (8)(加筋土重量) (9)(墙顶填土重量) (10) (11)(加筋土与地基土之间的滑动) (12)(i格栅层与加筋土之间的滑动) (13)(i层格栅下加筋填土重量) (14)(合力偏心距) (15)(地基极限承载力) (16)(地基总压力) (17) (18)2)内部稳定性分析计算: (19)(挡墙地基高程处由加筋土和附加荷载引起的推力

5、) (20)(某两层格栅中间点高程处) (21)(公式20水平分力) (22)(格栅层数) (23)(i层格栅所受拉力) (24)(i层格栅抗拉破坏安全系数) (25) (26) (27)(i层格栅的抗拉拔力) (28) (29) (30)(i层格栅抗拉拔安全系数) (31)3)总体深层稳定分析计算:(土体+格栅抗深层滑动) (32)(简化毕肖普条分法) (33)(格栅抗滑力矩) (34)customer qualification preliminary examination of the material of the borrower for the loan person, dete

6、rmine whether you meet the loan conditions (standard specification for details of the conditions the fifth chapter 5.1 loans and borrower conditions). 3. agree loan person decides to accept, according to interviews . First, the jurisdiction of the head office, branches and risk management, operation

7、al management should be strengthened on the Bank personal loan monitoring, inspection, management and guidance. Second, related personnel irregularities, according to qilu bank credits operational responsibility and accountability for implementation and the qilu bank employee violations of regulatio

8、ns dealing with regulations and other relevant rules of punishment and accountability. 9. According to file, and related system file 9.1 according to file a, and loan General II, and personal loan management provisional approach 9.2 related system file qilu Bank personal loan management approach 10.

9、 records table single records table single 1: personal loan customer talk record records table single 2: personal borrowing applications records table single 3: personal loan income proved records table single 4: personal loan survey declared table records table single 5: authorized Attorney (sample

10、) records table single 6: Personal most high borrowing support with application approval table records table single 7: personal single pen cycle borrowing application approval table records table single 8: drawing applications records table single 9: qilu Bank personal most high borrowing support with single records table single 10: arrived (quality) bet real right proved storage listing records table single 11: stop paid notice records table single机密第 9 页2019-2-7

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