1) sand layer
砂土层
1.
Mr Ji pit is deep freeze,the larger diameter shaft shaft against clay,sand layer,layer of gravel to take advanced construction,and guarantee the quality and safety of the project,and achieved good economic and social benefits.
丁集煤矿副井是我国冻结深度、井筒直径较大的井筒,针对黏土层、砂土层、砾石层采取先进的施工方法,保证了工程质量和安全,取得了良好的经济效益和社会效益。
2.
The construction on different layers,such as sand layer and clay layer is analyzed and summarized,which provides reference for similar construction later on.
结合西安一处实际工程,介绍了机械化顶管施工的施工工艺和注意事项,对机械化顶管施工方法在砂土层、黏土层不同的施工情况进行了分析和总结,对今后同类型施工具有参考作用。
2) thick sandy soil layer
厚砂土层
1.
Simulating on damage law of disturbed thick sandy soil layer and transference of load in shallow seam;
浅埋煤层采动厚砂土层破坏规律模拟
2.
Mathematical model of "arch beam" of thick sandy soil layer movement in shallow seam
浅埋煤层地表厚砂土层“拱梁”结构模型研究
3.
By simulating model test of dynamic load transmitting, the “arch type” and “thick arc shell” damage form of thick sandy soil layer upon shallow coal seam in first weighting is revealed.
通过实测发现了厚砂土层载荷传递现象,提出了顶板关键层载荷层载荷传递因子的概念。
3) sand formation
砂类土层
1.
The practice experience and construction result of directly put leoss near by the engineering site into borehole to make mud when making bored piles in sand formations were introduced.
介绍了砂类土层中进行泥浆护壁钻孔灌注桩施工时,采用施工场区临近地层黄土注入孔内直接造浆成孔的实践经验和施工效果。
4) soil and sand interbed
土砂互层
1.
Experimental study for the break angle and the breaking up of the shallow tunnel in soil and sand interbed;
土砂互层中浅埋隧道破裂角及破坏试验研究
5) sandy strata
砂性土层
1.
The suitable additives (soapy water and foaming agent) are used to improve construction condition when tunnel passes through sandy strata.
土压平衡盾构掘进是软土地区地铁隧道施工的主要方法之一,但是盾构在穿越塑流性差、含水量高、渗透系数大的砂性土层时,存在土体受扰动发生液化、流砂或由于螺旋出土器出土困难使工作面形成“干饼”等许多技术难题。
补充资料：砂土液化
| 砂土液化 Sand Liquefaction 饱水的疏松粉、细砂土在振动作用下突然破坏而呈现液态的现象。其机制是饱和的疏松粉、细砂土体在振动作用下有颗粒移动和变密的趋势，对应力的承受从砂土骨架转向水，由于粉和细砂土的渗透力不良，孔隙水压力会急剧增大，当孔隙水压力大到总应力值时，有效应力就降到0，颗粒悬浮在水中，砂土体即发生液化。砂土液化后，孔隙水在超孔隙水压力下自下向上运动。如果砂土层上部没有渗透性更差的覆盖层，地下水即大面积溢于地表；如果砂土层上部有渗透性更弱的粘性土层，当超孔隙水压力超过盖层强度，地下水就会携带砂粒冲破盖层或沿盖层裂隙喷出地表，产生喷水冒砂现象。地震、爆炸、机械振动等都可以引起砂土液化现象，尤其是地震引起的范围广、危害性更大。砂土液化的防治主要从预防砂土液化的发生和防止或减轻建筑物不均匀沉陷两方面入手。包括合理选择场地；采取振冲、夯实、爆炸、挤密桩等措施，提高砂土密度；排水降低砂土孔隙水压力；换土，板桩围封，以及采用整体性较好的筏基、深桩基等方法。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条