Factors influencing on the bearing capacity and deformation of composite soil nailed wall are discussed . some conclusions are helpful to the design and construction of composite soil nailed wall in xi ' an area 探讨了复合土钉墙的承载机理以及复合土钉墙受力变形的影响因素，一些结论对西安地区复合土钉墙的设计施工具有参考价值。
Composite soil nailing wall ( csnw ) is a new bracing structure of foundation pit , which has been used widely in the region of shenzhen , shanghai , wuhan etc , and has obationed good economical and social performance 复合土钉墙支护是一种新型基坑支护方式，近年来已在深圳、上海、武汉等地区得到了广泛的应用，并取得了良好的经济效益和社会效益。
Soil nailing walls can ensure the stability of some trenches but the horizontal displacement is too large to satisfy the needs of building or concealed work " s security . how to reduce the displacement of the soil nailing wall system 有的基坑土钉墙支护能保证其稳定性，但水平位移过大，满足不了基坑周边既有建筑物或隐蔽物的要求，如何改善土钉墙支护结构位移过大的问题
The methods are put forward to check the anti - seepage stability , anti - heave stability and overall stability of the composite soil nailed wall , in which the mistakes of shearing force balance method now used in anti - heave stability is pointed out and corrected 归纳并研究了复合土钉墙的破坏形式，对复合土钉墙的抗渗流稳定性、抗隆起稳定性和整体稳定性进行了验算。对抗隆起稳定性验算中的剪力平衡法，指出了现行计算方法中的错误，推导出了正确的计算公式。
Fifteen degree or so of nail and anchor inclination is the optimized . some certain value of nail space is proposed by which soil nailing structure and earth nail wall can be differentiated . the method to analyze the gravity retaining wall is applied to earth nail wall 建议土钉和锚杆倾角采用15左右为宜；当土钉间距小于某一值，或土钉密度大于某一定值时，土钉支护形成重力式挡土墙，即土钉墙，此时可以采用重力式挡土墙的分析方法对土钉支护进行分析。
Some beneficial results of the csnw ' s behaviors are gotten . main research contents as follows : ( 1 ) the four destruction models and respective stability analysis methods are discribed in this paper , whose working mechnism and calculating methods are given . in addition , some defects of every method are also discussed ; ( 2 ) on the basis of traditional active soil pressure method and expirical siol pressure method , the calculating model of the laternal earth pressure which is a tetragon with the largest value in the center side is addressed 主要工作如下： ( 1 )本文给出了复合土钉墙的稳定性分析方法，该方法介绍了复合土钉墙的四种破坏类型，分析了每种破坏类型的受力机理，并给出了相应的计算方法和计算方法中的一些不足； ( 2 )在传统的主动土压力和经验土压力的基础上，建立了土钉墙中间大、上下小的四边形状分布的侧向土压力的计算模式。
There are no calculation analysis methods for it and the design main depends on experience . the behind schedule theories research obstructs the csnw ' s further development . therefore , the thesis focuses on this topic and following foundamental studies on the relate issues are performed . on the soil nailing and composite research foundation , according to csnw ' s present research condition and the engineering effective demand , the stability of csnw is studied systematically by methods of theories research and case research 理论研究的落后制约了复合土钉墙支护的进一步发展，因此，在前人对土钉及复合土钉研究的基础上，根据目前复合土钉墙支护的研究现状和工程的实际需要，本文针对当前深基坑支护中广泛应用的土钉墙及设计计算理论与设计方法，采用理论研究、工程实例相结合的方法，对土钉拉力和边坡的侧向土压力进行了分析研究。
As a foundation pit excavating support technology which is easy and celerity to implement , safe and less cost , soil nailing is getting more and more application to deep excavation construction . however , soil nailing cannot be used in very soft soil or for cases which deformation of the soil nailing has to be strictly limited . to cope with these more difficult situations , compound soil nailing , i . e . a combination of soil nailing with soil - cement mixing piles or mini pile , is recently developed 土钉支护作为一种经济可靠、快速简便的挡土技术,已在深基坑开挖施工中得到越来越多的应用,但单纯的土钉支护技术不能用于淤泥质土,砂土等不良土层及对变形控制严格的情况,所以近年来又发展了土钉与搅拌桩、微型桩等支护相结合的复合型土钉墙支护形式。
Abstract : the applied ranges and general characteristics and structural shapes and deformation - controlled technique etc . are researched on the composite soil - nailing wall with retaining water according to its engineering practice in shenzhen area , and the calculating method of its design is put forward 文摘:依据深圳地区的工程实践，对挡土挡水复合型土钉墙的适用范围、一般特点及结构型式、变形控制技术等进行了研究，并提出了挡土挡水复合型土钉墙的设计计算方法。
The paper also has a research on the influence of compound soil nailing behavior in the perspective of silt and hardpan of the effect of the width of soil - cement mixing piles . 3 . with the analysis of various effecting factors on compound soil nailing , the paper holds a analysis of the mechanism ’ s essence of the compound soil nailing 2 .深入分析了土体的弹性模量,水泥搅拌桩的弹性模量,水泥搅拌桩挡墙的宽度,土钉长度的变化以及土钉倾角的变化对复合型土钉墙变形性状和土钉轴力的影响,以及水泥搅拌桩挡墙的宽度在淤泥土层以及砂土土层中对复合型土钉墙支护变形性状的影响。
