地層變位分配控制原理在小間距偏壓突變大斷面隧道中的應(yīng)用研究
發(fā)布時間：2018-10-05 14:41
【摘要】：利用分步變位控制原理研究復(fù)雜地質(zhì)淺埋暗挖小間距偏壓突變隧道施工過程中地層變形規(guī)律,對限制周邊環(huán)境及結(jié)構(gòu)本身復(fù)雜的隧道工程地表變形具有指導意義。依托深圳地鐵7號線工程實例,分析地表在多種復(fù)雜條件下的變形規(guī)律,結(jié)果表明,數(shù)值模擬過程中,注漿體充分發(fā)揮了作用,地表豎向沉降量(最大為14.82 mm)滿足標準要求,但實際監(jiān)測得到的地表沉降位移明顯超過標準值,因為地表變形不僅受注漿措施的控制,還會受到多種不確定因素的影響,但從現(xiàn)場觀測結(jié)果來看,同時經(jīng)相關(guān)單位論證后,表明并沒有因為隧道施工影響周邊建筑物的正常運行。因此保障隧道結(jié)構(gòu)及周圍環(huán)境安全才是最重要的,用統(tǒng)一標準進行地表沉降控制是不盡合理的,對處于復(fù)雜地質(zhì)環(huán)境中,且結(jié)構(gòu)本身復(fù)雜的隧道工程來說,日常沿用標準幾乎不適用。
[Abstract]:Using the principle of stepwise displacement control to study the formation deformation law in the construction process of shallow buried tunnel with small spacing and bias pressure in complex geology, it is of guiding significance to limit the surface deformation of tunnel engineering with complex surrounding environment and structure itself. Based on the engineering example of Shenzhen Metro Line 7, the deformation law of the surface under various complicated conditions is analyzed. The results show that the grouting body plays a full role in the process of numerical simulation, and the surface vertical settlement (maximum 14.82 mm) meets the standard requirements. However, the ground subsidence displacement obtained by actual monitoring is obviously higher than the standard value, because the surface deformation is not only controlled by grouting measures, but also affected by many uncertain factors. However, from the field observation results, and after demonstration by relevant units, It shows that the normal operation of surrounding buildings is not affected by tunnel construction. Therefore, it is the most important to ensure the safety of tunnel structure and surrounding environment. It is unreasonable to control the surface subsidence by using unified standard, for the tunnel engineering which is in the complex geological environment and the structure itself is complex. The standard of daily use is hardly applicable.
【作者單位】： 天津大學水利工程仿真與安全國家重點實驗室;天津大學建筑工程學院;中國水利水電第十四工程局有限公司;
【基金】：國家自然科學基金創(chuàng)新研究群體科學基金(51321065)
【分類號】：U455.4
本文編號：2253780
[Abstract]:Using the principle of stepwise displacement control to study the formation deformation law in the construction process of shallow buried tunnel with small spacing and bias pressure in complex geology, it is of guiding significance to limit the surface deformation of tunnel engineering with complex surrounding environment and structure itself. Based on the engineering example of Shenzhen Metro Line 7, the deformation law of the surface under various complicated conditions is analyzed. The results show that the grouting body plays a full role in the process of numerical simulation, and the surface vertical settlement (maximum 14.82 mm) meets the standard requirements. However, the ground subsidence displacement obtained by actual monitoring is obviously higher than the standard value, because the surface deformation is not only controlled by grouting measures, but also affected by many uncertain factors. However, from the field observation results, and after demonstration by relevant units, It shows that the normal operation of surrounding buildings is not affected by tunnel construction. Therefore, it is the most important to ensure the safety of tunnel structure and surrounding environment. It is unreasonable to control the surface subsidence by using unified standard, for the tunnel engineering which is in the complex geological environment and the structure itself is complex. The standard of daily use is hardly applicable.
【作者單位】： 天津大學水利工程仿真與安全國家重點實驗室;天津大學建筑工程學院;中國水利水電第十四工程局有限公司;
【基金】：國家自然科學基金創(chuàng)新研究群體科學基金(51321065)
【分類號】：U455.4
【相似文獻】
相關(guān)期刊論文 前1條
1 陳建濤;從損失控制原理看實施ISM的意義[J];中國水運;1996年09期
，本文編號：2253780
本文鏈接：http://sikaile.net/kejilunwen/daoluqiaoliang/2253780.html
