本文選題：樁板結構 + 嵌固形式　； 參考：《重慶交通大學》2016年碩士論文

【摘要】：樁板結構是近些年來出現的一種新型常見的邊坡加固結構,具有良好的防護加固效果,用途廣泛,可用于特殊土地區(qū),地震區(qū)和雨水多發(fā)區(qū)的高邊坡和路堤、路塹。在滑坡治理中更是常見的應用手段。本文研究了樁板結構與巖土體之間的相互作用機理與分析樁板結構嵌固深度的優(yōu)化設計。本文對樁板結構的研究主要有以下內容與結論:(1)樁板結構中樁身嵌固方式的研究。通過摩爾-庫倫準則確定條間剪力,改進了傳統(tǒng)的傳遞系數法。通過分析樁身在自由、鉸支、固定三種狀態(tài)下彎矩和位移的不同變化,并對比K法、M法的適用條件,從而找到樁身合理的嵌固條件與嵌固形式。(2)基于土拱效應理論,研究了樁板—巖土體相互作用的機理。分析了板位置不同時樁板結構的受力傳遞機制;根據“普氏卸載拱”理論,建立了樁板間巖土體的受力模型,通過數值分析,考慮靜態(tài)與地震作用下巖土對樁板結構及土拱效應的影響。(3)根據土拱效應原理及板位的變化,對樁板結構構件的設計進行了比較分析。通過數值模擬擋板在樁身前后時樁板結構的內力變化分析,提出了合理化的建議。(4)通過FLAC 3D數值模擬分析了樁身嵌固深度對滑坡穩(wěn)定性的影響,得出當樁身嵌固段長度為樁身總長度的1/2—1/3時最為合理,并采用等值梁法進行了驗證。提出一種簡單的、符合工程的樁身嵌固深度的方法。
[Abstract]:Pile-slab structure is a new type of common slope reinforcement structure in recent years. It has a good effect of protection and reinforcement. It can be used in high slope, embankment and cutting in special land area, earthquake area and Rain Water area. In landslide treatment is a common means of application. In this paper, the interaction mechanism between pile-slab structure and rock and soil is studied and the optimum design of the embedded depth of pile-slab structure is analyzed. The research of pile-slab structure in this paper includes the following contents and conclusions: 1) the research of pile-body embedded mode in pile-slab structure. The shear force between strips is determined by Moor-Coulomb criterion, and the traditional transfer coefficient method is improved. By analyzing the different changes of bending moment and displacement of pile body under three conditions: free, hinged and fixed, and comparing the applicable conditions of K method and M method, we can find out the reasonable inlay condition and embedded form of pile body based on the theory of soil arch effect. The mechanism of pile-slab-rock-soil interaction is studied. The stress transfer mechanism of pile-slab structure with different plate positions is analyzed, and the mechanical model of rock and soil between piles and plates is established according to the theory of "Presch unload arch", and the numerical analysis is carried out. Considering the influence of rock and soil on pile-slab structure and soil-arch effect under static and seismic action, the design of pile-slab structural members is compared and analyzed according to the principle of soil-arch effect and the change of plate position. Through the numerical simulation of the internal force change of the pile-plate structure in front and back of the pile, the rational suggestion is put forward. The influence of the embedded depth of the pile body on the stability of the landslide is analyzed by FLAC 3D numerical simulation. When the length of the fixed segment is 1 / 2 / 1 / 3 of the total length of the pile, the method of equivalent beam is used to verify it. In this paper, a simple method is presented to fit the depth of the pile body embedded in engineering.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TU435

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本文編號：1870557