發(fā)布時間：2018-11-24 19:45

【摘要】：【目的】凍結(jié)法施工中,為了工后跟蹤注漿及控制融沉,必須了解地鐵聯(lián)絡(luò)通道解凍溫度發(fā)展規(guī)律�！痉椒ā恳攒浲了淼缆�(lián)絡(luò)通道凍結(jié)法工程為背景,對解凍溫度場、深層土體溫度變化規(guī)律等進行了實測;為更有效控制融沉,對其跟蹤注漿時機及順序、注漿工藝及材料進行了優(yōu)化�！窘Y(jié)果】聯(lián)絡(luò)通道解凍20 d內(nèi),部分土體溫度開始達到0℃附近,凍土進入相變階段;入土深度越大,土體相變階段持續(xù)時間越長;軟土融沉主要發(fā)生在解凍前2個月,側(cè)墻及頂部完全解凍需要4個月,則跟蹤注漿至少應(yīng)持續(xù)的時間為3~4個月�！窘Y(jié)論】控制融沉過程中,注漿應(yīng)按照由底部→頂部→側(cè)墻的順序先后進行;同時要根據(jù)實測溫度和地面沉降量實行雙控標(biāo)準(zhǔn)。合理安排施工順序和注漿參數(shù),加強監(jiān)測,可以進一步使得聯(lián)絡(luò)通道周邊土層受融沉影響范圍縮小,降低聯(lián)絡(luò)通道頂部受融沉的影響程度。
[Abstract]:[objective] in order to track grouting and control thawing settlement after construction, it is necessary to understand the development rule of the thawing temperature in the connection channel of subway. [methods] the thawing temperature field is studied based on the freezing method of tunnel connection channel in soft soil. The temperature variation law of deep soil is measured. In order to control thawing subsidence more effectively, the timing and sequence of grouting, grouting process and material were optimized. [results] within 20 days of thawing through the contact channel, the temperature of some soil began to reach 0 鈩，

本文編號：2354817