本文選題：地下廠房 + 監(jiān)測��； 參考：《地下空間與工程學(xué)報》2016年03期

【摘要】：猴子巖地下廠房洞室群規(guī)模巨大,其中主廠房、主變室、尾調(diào)室跨度分別達(dá)到29.2m、18.8 m和23.5 m,廠區(qū)擠壓破碎帶及裂隙密集帶發(fā)育,實(shí)測地應(yīng)力量級為21.53 MPa~36.43MPa,為高地應(yīng)力區(qū)。筆者采用三維非線性有限元法,根據(jù)6個剖面的監(jiān)測資料,進(jìn)行了包含巖錨梁巖臺的上部第2級開挖跟蹤反饋,并對后續(xù)第3、4級開挖進(jìn)行了預(yù)測分析。結(jié)果表明,猴子巖地下廠房在第2級開挖后洞周變位較大,巖錨梁處最大變位為38.05 mm,塑性區(qū)發(fā)育深度6.02 m,該計算結(jié)果與現(xiàn)場監(jiān)測結(jié)果吻合。預(yù)測第3、4級開挖后,邊墻處變位分別增至47.26 mm和71.65 mm,塑性區(qū)進(jìn)一步加深達(dá)8.4 m,但各洞室間未連通。本次計算為后續(xù)施工提供了重要的參考依據(jù),并認(rèn)為現(xiàn)有條件下地下廠房圍巖整體穩(wěn)定性良好,加固處理措施有效。
[Abstract]:The cavern group of monkey rock underground powerhouse is very large, in which the span of main workshop, main transformer room and tail-adjusting chamber is up to 29.2mt 18.8 m and 23.5 m, respectively. The compressive fracture zone and fissure-dense zone are developed in the plant area. The measured in-situ stress is 21.53 MPA ~ (36.43) MPA, which is a high in-situ stress zone. Based on the monitoring data of six sections, the author used the three-dimensional nonlinear finite element method to carry out the follow-up feedback of the second stage excavation of the upper part containing the rock anchor beam platform, and the prediction and analysis of the follow-up excavation of the third stage and the fourth stage. The results show that the maximum displacement of rock anchor beam is 38.05 mm and the depth of plastic zone is 6.02 m. The calculated results are in good agreement with the field monitoring results. It is predicted that the displacement of the side wall increases to 47.26 mm and 71.65 mm, and the plastic zone is further deepened to 8.4 m after the 3rd stage excavation, but there is no connection between the caverns. This calculation provides an important reference basis for the subsequent construction, and it is considered that the overall stability of surrounding rock of underground powerhouse is good under the existing conditions, and the reinforcement measures are effective.
【作者單位】： 蘭州市城關(guān)區(qū)林業(yè)局徐家山林場;四川大學(xué)水力學(xué)及山區(qū)河流開發(fā)與保護(hù)國家重點(diǎn)實(shí)驗(yàn)室水利水電學(xué)院;中國水電顧問集團(tuán)成都勘測設(shè)計研究院;
【分類號】：TV731.6

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