Acoustic emission monitoring of surrounding rock of overpass tunnels with small clear spacing 小净距立交隧道开挖围岩稳定性声发射监测
It is clear that a combination spacing of vertical and horizontal wells is perspective to develop the reservoir with low permeability. 低渗透储层水平井&直井联合布井技术具有广泛的应用前景,其布井方式至关重要。
Cost Comparison and Analysis of Tunnels with Small Clear Spacing, Multiple Arch Tunnels and Common Separated Tunnels 小净距隧道、连拱隧道、普通分离式隧道造价对比分析
Model tests were carried out to investigate the influence of relative displacement between pile and soil, embankment height, width and clear spacing of cap-beam, and geotextile on pile-soil stress ratio and settlements of the embankments. 本文通过模型试验,研究了桩土相对位移、路堤高度、桩梁净间距、桩梁宽度及水平加筋体等因素对桩土应力比及路堤沉降的影响。
On rational clear spacing of tunnel with small clear spacing based on strength reduction technique 基于强度折减法小净距隧道合理净距的研究
We find clear evidence showing that the deviation of critical point is only due to the difference of higher order terms of lattice spacing a. 观察到仅由于格点间隔α的高次幂项不同而引起临界点明显漂移的现象。
Study on site monitoring of large-section highway tunnels with small clear spacing 大断面小净距公路隧道现场监测分析研究
In different patterns, the difference of wheat's 1000-grain-weight and starch content shows no significant, protein content in tree is higher than outside tree, especially the tendency shows clear in long row spacing. 在不同配置模式下,小麦千粒重、淀粉含量差异不显著,蛋白质含量林内要高于林外,尢其在大行距林分,这种表现更为明显。
Higher ratio of embankment height to cap-beam clear spacing as well as higher ratio of cap-beam width to clear spacing would result in higher pile-soil stress ratio. 路堤高度与桩梁净间距之比越大,桩土应力比越大;桩梁宽度与桩梁净间距之比越大,桩土应力比也越大;
A Simulated Algorithm Applied to the Calculation of Highway Lateral Clear Spacing 一种用于确定公路横净距值的计算机模拟解算方法
When the ratio of embankment height to cap-beam clear spacing h/ s ≤ 1.4, apparent differential settlements might occur on the surface of embankment. 当路堤高度与桩梁净间距之比小于1.4时,无论是否使用水平加筋体,路堤顶面均会出现明显的差异沉降;
Application of Small Clear Spacing Tunnel in Mountainous Expressways 小净距隧道在山区高速公路中的应用
The numerical results show that the height of the equal settlement plane is mainly influenced by the pile-cap clear spacing and has nearly no relationship with the pile-subsoil relative displacements, the reinforcements tensile strengths, and the mechanical properties of embankment fill. 数值模拟发现,等沉面高度主要决定于桩梁净间距,而桩土相对位移、路堤填料强度参数c、φ及水平加筋体拉伸强度对等沉面高度几乎没有影响。
TEM observation shows that after creep the boundary of subgrain is clear, the phase difference between subcrystals is very small, while the subgrain boundary dislocation spacing decreases, the dislocation density within subgrain almost unchanged. TEM组织观察表明蠕变之后亚晶粒边界清晰,亚晶之间的位相差很小,同时亚晶界位错间距减小,亚晶内位错密度几乎不变。