本文選題：地質(zhì)力學(xué) + 廣西盆地　； 參考：《巖石力學(xué)與工程學(xué)報》2017年S1期

【摘要】：貴廣高鐵廣西段位于廣西盆地東北部,是連接"一帶一路"的高速通道,為查明研究區(qū)的地應(yīng)力分布特征,為隧道的設(shè)計提供基礎(chǔ)資料,在廣西5個不同地區(qū)開展了8個鉆孔的水壓致裂地應(yīng)力測量工作,結(jié)果表明:研究區(qū)內(nèi)最大水平主應(yīng)力S_H方向主要表現(xiàn)為NNW-NWW,這與華南區(qū)域應(yīng)力場相一致;S_H和最小水平主應(yīng)力S_h的梯度小于全國平均地應(yīng)力梯度。在深度小于300 m的范圍內(nèi),三向主應(yīng)力相對大小以S_HS_hS_v為主,在這種應(yīng)力狀態(tài)下有利于逆斷層的活動;在深度大于300 m的范圍內(nèi),三向主應(yīng)力相對大小以S_HS_vS_h為主,在這種應(yīng)力狀態(tài)下有利于走滑斷層的活動,這種應(yīng)力狀態(tài)與研究區(qū)以逆斷兼走滑的斷層結(jié)果較為一致。研究區(qū)側(cè)壓力系數(shù)的值和μ_m值(最大剪應(yīng)力與平均主應(yīng)之比)均表明測區(qū)內(nèi)斷層處于穩(wěn)定狀態(tài),這與研究區(qū)屬于構(gòu)造穩(wěn)定區(qū)的研究結(jié)果相一致。
[Abstract]:The Guangxi section of Gui-Guang high-speed railway is located in the northeast of Guangxi Basin. It is a high-speed passage connecting "Belt and Road". It can provide basic data for the design of tunnels and to find out the characteristics of in-situ stress distribution in the study area. In five different regions of Guangxi, the in-situ stress measurement of hydraulic fracturing of 8 boreholes has been carried out. The results show that the maximum horizontal principal stress Sh direction is mainly NNW-NWW-NNW, which is consistent with the regional stress field in South China. The gradient of SSP H and the minimum horizontal principal stress Sh is smaller than that of the national average in-situ stress gradient. In the range of depth less than 300m, the relative magnitude of the three-way principal stress is S_HS_hS_v, which is favorable to the activity of the reverse fault in this stress state, and the relative magnitude of the three-way principal stress is S_HS_vS_h when the depth is larger than 300m. This state of stress is favorable to the activity of strike-slip faults, which is consistent with the results of the faults with reverse fault and strike-slip in the study area. The values of the lateral pressure coefficient and 渭 M (the ratio of the maximum shear stress to the mean principal response) indicate that the faults in the measured area are in a stable state, which is consistent with the results of the study on the structural stability in the study area.
【作者單位】： 中國地震局地殼應(yīng)力研究所;中國地震局地殼動力學(xué)重點實驗室;中國科學(xué)技術(shù)大學(xué)地球和空間科學(xué)學(xué)院;中國地質(zhì)科學(xué)院水文地質(zhì)環(huán)境地質(zhì)研究所;中國建筑科學(xué)研究院;
【基金】：國家自然科學(xué)基金資助項目(41404036,41574081) 中國地震局地殼應(yīng)力研究所中央級公益性科研院所基本科研業(yè)務(wù)專項資助項目(ZDJ2016 10)~~
【分類號】：P642

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