飽和砂土中淺埋單藥包爆炸效應(yīng)研究
[Abstract]:In order to explore the optimal buried depth of the medicine package in saturated sand field, a series of shallow buried single charge explosion tests in saturated sandy soil were carried out based on the outdoor large explosion test site, and the variation rule of ultra-pore water pressure and explosion pit-forming effect were analyzed. The results show that both the peak value and cumulative value of pore water pressure decrease rapidly with the increase of explosion distance. The increase of entrapment depth is beneficial to the accumulation and maintenance of excess pore water pressure, and the ratio of super pore water pressure at the same ratio has an increasing trend with the increase of the ratio of buried depth. The ultra-pore water pressure ratio is approximately linear in the semi-logarithmic coordinates of the proportional distance, and its variation trend is basically consistent with that of the completely enclosed explosion. However, some explosion energy is dissipated directly through the free surface because of the small depth of the entrapment of the charge. The rise of excess pore water pressure is much weaker than that of deep buried explosion. Compared with the wet sand environment, the local sand around the crater in saturated sand has the tendency of liquefaction flow, which makes the transverse expansion of the crater more severe. Therefore, the diameter of the crater in saturated sand is larger than that in wet sand under the same dosage and buried depth.
【作者單位】: 武漢市市政建設(shè)集團(tuán)有限公司;寧波市交通建設(shè)工程試驗(yàn)檢測(cè)中心有限公司;河海大學(xué)土木與交通學(xué)院;中國地質(zhì)大學(xué)(武漢)工程學(xué)院;
【基金】:國家自然科學(xué)基金資助項(xiàng)目(51379067) 長江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃項(xiàng)目(IRT1125)~~
【分類號(hào)】:TU441;TU751.9
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