本文選題：類(lèi)矩形盾構(gòu) + 光滑粒子流體動(dòng)力學(xué)(SPH)方法��； 參考：《同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年11期

【摘要】：異型盾構(gòu)由于自身斷面幾何形狀的特殊性,需要對(duì)其同步注漿的擴(kuò)散效果及參數(shù)控制進(jìn)行深入研究.利用光滑粒子流體動(dòng)力學(xué)(SPH)方法對(duì)國(guó)內(nèi)第1條類(lèi)矩形盾構(gòu)法隧道工程中同步注漿擴(kuò)散機(jī)制和參數(shù)獲取進(jìn)行研究.分析結(jié)果表明,漿液擴(kuò)散模式具有縱環(huán)向相互關(guān)聯(lián)的擠壓填充性流動(dòng)特征,其在盾構(gòu)頂/底部填充效率較差;高流動(dòng)度和早強(qiáng)高抗剪性漿液的擴(kuò)散面弧度與壓力損失率效果以及整環(huán)流動(dòng)封閉效率和填充均勻度都優(yōu)于液態(tài)漿和抗剪漿;注入率150%對(duì)周邊環(huán)境的擾動(dòng)程度最小,上下孔位漿液注入比為4∶3∶2∶1的注漿效果最好,體現(xiàn)為漿液壓力分布更均勻;而考慮較快的閉合/充盈時(shí)間可以認(rèn)為對(duì)稱(chēng)孔位布置更適合類(lèi)矩形盾構(gòu)同步注漿施工.
[Abstract]:Due to the particularity of its section geometry, the diffusion effect of synchronous grouting and the control of its parameters need to be deeply studied. The diffusion mechanism and parameter acquisition of synchronous grouting in the first class of rectangular shield tunneling in China are studied by using smooth particle hydrodynamics (SPH) method. The results show that the slurry diffusion model has the characteristics of compression-filled flow with longitudinal and circumferential correlation, and its filling efficiency at the top / bottom of shield is poor. The diffusion surface radians and pressure loss rates of high mobility, early strength and high shear resistance slurry, as well as the sealing efficiency and filling uniformity of annular flow are superior to those of liquid slurry and shear slurry, and the injection rate of 150% has the least disturbance to the surrounding environment. The slurry injection ratio of 4: 3: 2: 1 in the upper and lower hole position is the best, which shows that the slurry pressure distribution is more uniform, and considering the faster closing / filling time, it can be considered that the symmetrical hole position arrangement is more suitable for the synchronous grouting construction of rectangular shield machine.
【作者單位】： 同濟(jì)大學(xué)土木工程學(xué)院;上海隧道工程股份有限公司;
【基金】：國(guó)家自然科學(xué)基金(51378388) 上海市科學(xué)技術(shù)委員會(huì)重點(diǎn)科研項(xiàng)目(14DZ1207900)
【分類(lèi)號(hào)】：U455.43
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本文編號(hào)：1807237