【摘要】：由于塢式結(jié)構(gòu)(又稱為U型結(jié)構(gòu))具有整體性好、防滲性強(qiáng)、對(duì)地基承載力要求較低等優(yōu)點(diǎn),越來(lái)越多的建于軟土地基和復(fù)雜地基上的船閘采用這種結(jié)構(gòu)。船閘的閘首作為船閘工程的主要組成部分,閘首工程結(jié)構(gòu)計(jì)算的正確性對(duì)保證船閘設(shè)計(jì)的合理性起著決定性的作用,而現(xiàn)如今在閘首的設(shè)計(jì)方面主要還是將空間問(wèn)題簡(jiǎn)化為平面問(wèn)題進(jìn)行計(jì)算,為了能反映船閘三維結(jié)構(gòu)的受力特點(diǎn),本文依托潁上復(fù)線船閘,借助ANSYS分析軟件采用解析法及三維非線性法對(duì)船閘閘首應(yīng)力及變形特征進(jìn)行計(jì)算分析,并采用單因素分析法探討回填土參數(shù)及回填土表面荷載對(duì)結(jié)構(gòu)內(nèi)力的影響,得到以下結(jié)論：(1)通過(guò)對(duì)解析法計(jì)算結(jié)果和有限元法計(jì)算結(jié)果進(jìn)行對(duì)比分析,得到兩種方法的計(jì)算結(jié)果比較接近,說(shuō)明三維數(shù)值模型能夠較真實(shí)反映閘首復(fù)雜荷載和使用條件,驗(yàn)證了模型的正確性和實(shí)用性以及計(jì)算結(jié)果的準(zhǔn)確性。(2)通過(guò)不同工況下對(duì)結(jié)構(gòu)應(yīng)力和位移的分析,可以得到閘門上的水壓力是引起閘首結(jié)構(gòu)在順河向產(chǎn)生位移的主要原因;閘首底板表面在三種工況下都產(chǎn)生了不同程度的拉應(yīng)力,在閘首邊墩與底板接觸部位以及邊墩與閘門接觸部位出現(xiàn)不同程度的應(yīng)力集中；在三種工況下,由于有回填土壓力的作用,左側(cè)邊墩變形和應(yīng)力大于右側(cè)邊墩,豎直方向閘首結(jié)構(gòu)主要受到壓應(yīng)力。(3)通過(guò)對(duì)影響結(jié)構(gòu)受力的因素進(jìn)行分析,結(jié)果表明：土體強(qiáng)度越高結(jié)構(gòu)本身的應(yīng)力、接觸應(yīng)力、沉降位移、水平位移及摩擦滑移越小,反之就越大,但土體內(nèi)摩擦角變化的影響較粘聚力對(duì)結(jié)構(gòu)受力和位移影響更敏感；回填土表面均布荷載對(duì)結(jié)構(gòu)物的受力和位移影響較大,是結(jié)構(gòu)受力影響的關(guān)鍵因素。
[Abstract]:Due to the advantages of docking structure (also called U-shaped structure), such as good integrity, strong impermeability and low requirement for foundation bearing capacity, more and more locks built on soft soil foundation and complex foundation adopt this kind of structure. As the main component of lock engineering, the correctness of structural calculation of lock head plays a decisive role in ensuring the rationality of lock design. At present, in the design of the gate head, the space problem is mainly simplified to a plane problem to be calculated. In order to reflect the stress characteristics of the three-dimensional structure of the lock, this paper relies on the Yingshang double line lock. The stress and deformation characteristics of shiplock head are calculated and analyzed by means of analytical method and three-dimensional nonlinear method with ANSYS analysis software, and the influence of backfill parameters and backfill surface load on structural internal force is discussed by single factor analysis method. The main conclusions are as follows: (1) by comparing and analyzing the results of the analytical method and the finite element method, the results of the two methods are close to each other, which shows that the three-dimensional numerical model can reflect the complex load and the operating conditions of the sluice head more truthfully. The correctness and practicability of the model and the accuracy of the calculation results are verified. (2) through the analysis of the stress and displacement of the structure under different working conditions, it can be concluded that the water pressure on the gate is the main cause of the displacement of the head structure along the river; The surface of the bottom plate of the sluice head produces different degrees of tensile stress under three working conditions, and the stress concentration is different in the contact part between the side pier and the bottom plate and the contact part between the side pier and the gate, and in the three conditions, Because of the backfill earth pressure, the deformation and stress of the left side pier is larger than that of the right side pier, and the vertical sluice head structure is mainly subjected to compressive stress. (3) through the analysis of the factors that affect the force of the structure, The results show that the higher the strength of soil, the smaller the stress, contact stress, settlement displacement, horizontal displacement and friction slip of the structure itself, but the more sensitive is the influence of the change of the internal friction angle of the soil than the cohesive force on the stress and displacement of the structure. The load distribution on the backfill surface has a great influence on the stress and displacement of the structure, which is the key factor of the influence of the structure.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U641

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本文編號(hào)：2118720