喷混凝土

"Shotcrete: or gunite, Concrete applied by spraying."

喷制混凝土：喷射施工用的混凝土。

Compared with the general concrete spray layer, the stress distribution is more homogeneous and the yield capacity is better.

与素混凝土喷层相比，聚丙烯纤维混凝土喷层中的应力分布较均匀，有较好的让压能力。

For the slope protection,domestic and foreign have various methods,such as:clean surface, and shotcrete stone surface and the use of concrete,asphalt,riprap,etc.,but these have a fatal weakness,the use of clean face,and shotcrete stone surface and the use of concrete,asphalt,riprap protection methods such as the slope,often due to excessive destruction of the human impact of the original natural and ecological environment.so that the entire road is almost formed a gray line,and While these protective measures outside the slope formed a protective layer of solid layer,but if there is a protective layer of water into the lower water flow and form,these protective measures will also be destroyed.

对于边坡的防护，国内、国外均有多种方法，比如：抹面、喷浆、石砌护面以及利用混凝土、沥青、抛石等等，但这些都有着致命的弱点，利用抹面、喷浆、石砌护面以及利用混凝土、沥青、抛石等方法进行防护的边坡，往往由于过多的人为影响破坏了原来的自然生态环境，使整条公路几乎形成一条灰色的路线，同时，这些防护措施虽然在边坡外面形成了一层坚固的防护层，但只要有水渗入防护层下部并形成水流时，这些防护措施也将被冲毁。

The application of "anchoring and shotcreting" supporting technology in the bunker construction is introduced,"anchoring and shotcreting"is a kind of timbering fashion of safety ,especially in surrounding wall rock on bad conditions.

介绍了"锚网喷+混凝土"联合支护技术在煤仓施工中的应用，"锚网喷+混凝土"联合支护技术是一种安全可靠的支护方式，尤其是在稳定性较差的围岩中的应用。

Using FEM, the coupled action of thermal stress and crustal stress has been taken into account. The regularities of distribution of the horizontal displacement of surface of slope and the shear stress of junction plane between shotcrete and rock are discussed too. According to the analysis, under the combined action of thermal stress and crustal stress, top and foot of slope are liable to be destructed. Ordinary, the destructional form of the top is tensile failure and the bottom is shear failure. There are some time effect of displacement and stress in the surface of slope and distribution of temperature in slope, which agrees with actual measured rules.

采用有限元的方法，考虑地应力与温度应力的耦合作用，分析了在一定的边界温度作用下不同时刻边坡喷层面的水平位移，以及喷层与岩层结合面处的剪应力的分布规律；指出在温度应力与地应力的共同作用下，喷混凝土边坡坡顶与坡脚均为容易发生破坏的地方，通常坡顶的破坏型式为拉张破坏而坡脚则为剪切破坏；边坡内的温度分布、边坡表面的位移与应力的变化均存在一定的时间效应，这一规律与实测规律比较吻合。

This paper expatiate the study on nail-shotting gun examination system, and applying that equipment to shotcrete strength examination in tunnel. That examinaton method is a better undamage examination method.

本文研究气压射钉枪检测系统，并将其应用于隧道喷混凝土强度检测，是一种比较理想的无损检测方法。

With the development of information-construction, More and more quick, abundant, reliable, undamage examination method to concrete strength are needed. The traditonal examination method to concrete strength can not satisfy the examination request. Study on nail-shotting gun examination system for shotcrete strength is very important for either theory or practice.

随着信息化施工的发展，对快速、大量、可靠、无损检测混凝土强度的技术要求越来越高，传统的强度检测方法难以满足要求，研究喷混凝土强度气压射钉枪检测系统具有重要的理论和实际意义。

The dry and wet jet two types of jet aircraft, conveying gas from the former dry mixing materials, in the nozzle and pressure mixture of water emitted from the latter by the gas or to transport concrete pump nozzle emitted by the concrete mixture.

分干式喷射机和湿式喷射机两类，前者由气力输送干拌合料，在喷嘴处与压力水混合后喷出；后者由气力或混凝土泵输送混凝土混合物经喷嘴喷出。

The dry and wet jet twotypes of jet aircraft, conveying gas from the former dry mixingmaterials, in the nozzle and pressure mixture of water emitted fromthe latter by the gas or to transport concrete pump nozzle emittedby the concrete mixture.

分干式喷射机和湿式喷射机两类，前者由气力输送干拌合料，在喷嘴处与压力水混合后喷出；后者由气力或混凝土泵输送混凝土混合物经喷嘴喷出。

In view of development of national economy and environmen tal protectio n, necessity of researching wet shotcrete technology is discussed in this paper based on rebound reduction, dust reduction and construction quality of wet shotc rete.

摘 要：从国民经济的发展和环境保护的观点出发，从湿喷混凝土减弹、降尘和保证建设质量的角度，论述了湿喷混凝土研究的必要性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。