土工格室_应用效果很好的公路建设新材料由刀豆文库小编整理，希望给你工作、学习、生活带来方便，猜你可能喜欢“土工格室检验报告公路”。
土工格室_应用效果很好的公路建设新材料
New materials of highway construction of geocell _ good application effect
随着人们对土工格室特性的进一步了解，已经发现其具有其它土工材料（土工布、土工膜、土工格栅、土工模袋、土工网等）不可替代的优势，使其在诸多领域有着独特的应用前景。With the further understanding of cell characteristics of soil, has been found with other geotechnical material(geotextile, geomembrane, geogrid, geotextile bag, geonet)irreplaceable advantages, so it has a unique application future in many fields.1 土工格室的特点Characteristics of geocell
土工格室是一种采用高强度聚乙烯片材，经超声波焊接等方法连接,展开后呈蜂窝状的三维立体网格结构材料,属于特种土工合成材料。在岩石工程中与土、砂、石等填料共同构成不同视粘聚力、不同加筋强度、不同深度的垫层。这些垫层可以根据工程的要求放置于需要的位置，用以加固公路的路基、边坡防护、修建挡土墙等。其最大的特点是可以完成岩石工程中常规方法难以处理的多种疑难问题，如桥头跳车、软基沉陷、翻浆、塌方等。具有材质轻，耐磨损，耐老化，耐化学腐蚀，适用温度范围宽，拉伸强度高，刚性、韧性好，抗冲击力强，尺寸相对稳定，运输方便等特点。在施工中连接简单易行，施工方法简单，从而简化了施工工序，提高了施工速度；并可以反复多次使用。
Geocell is a kind of high strength polyethylene sheet, connected by ultrasonic welding method, after the start of a three-dimensional grid structure material honeycomb, belongs to the special geotechnical synthetic material.In rock engineering and soil, sand, stone and other packing together constitute the cushion different apparent cohesion, different reinforcement strength, different depth.The cushion can according to engineering requirements placed on the required position, strengthening the highway roadbed, slope protection, retaining wall.Its biggest characteristic is can be a variety of difficult problems in rock engineering, conventional methods is difficult to deal with, such as the bridgehead soft foundation subsidence, frost heave，.With light weight, abrasion resistance, aging resistance, chemical corrosion resistance, wide applicable temperature range, high tensile strength, rigidity, good toughne, strong shock resistance, size is relatively stable, the characteristics of convenient transportation etc..In the construction of the connection is simple, simple construction method, which simplifies the construction proce, improve the construction speed and can be repeatedly used.2 土工格室的基本原理principles of geocell
土工格室之所以具有卓越功效而受到工程界的关注,还应从其基本原理说起。国外文献中在描述其原理时称其为“一种蜂窝状三维限制系统，可以在很大范围内显著提高普通填充材料在承载和虫蚀控制应用中的性能。”它的关键原理就是三维限制。大家都知道，当汽车行驶在沙漠上时，就会压出两道深深的辙印，被压部分深深下陷，车辙两侧会高高隆起。后面的车辆如果继续沿着车辙前进，沉陷部分会进一步下沉、隆起部分会进一步隆起，直到隆起部分蹭到了车底盘、沉陷的车辙埋没了大半个轮子，进而无法前进。之所以如此，就是因为当外荷作用于地基表面时，依据普朗特尔理论和泰勒理论可知：在集中荷载的作用下，主动区1受压下沉，并将力向两侧分解传递给过渡区2，过度区2又传给被动区3，被动区就会毫无限制地发生形变而隆起。也就是说，载荷一旦作用于路基，在载荷的下方就会形成起契状的主动区域，它又通过过渡区域进行挤压，从而使被动区域发生隆起。也就是说，通过沿滑
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移线的剪切力和移动主动、过渡、被动三个区域的力决定了地基的承载能力。
不仅在沙基地上可以十分明显的体会到以上原理的真实过程，在软基公路上也会找到这种的样板，只不过其形成的速率较之在砂上的变化慢些罢了。即使较好的路基材料也仍然无法避免其横向移动。一般的高速公路路基都高出地面好几米，吸水翻浆不太容易，但长期沉降依然存在。究其原因，雨水滲透、材料流失、基地下沉是其中部分原因，路基路面在车轮荷载长期碾压、振动力的作用下，材料向路基断面两侧横向位移不可否认是另外一个十分重要的原因。以我省各地各级公路为例，都有在该路的主行车道上可以明显感觉到路面已经被压出了一条“S”型沟状带。部分高速公路也不例外，汽车行驶在行车道上的颠簸明显强烈于行驶在超车带上的感觉，在道桥连接段尤为明显（俗称“桥头跳车”）。这种沟状路基沉降就是路基材料横向滑移的典型。
Geocell has superior efficacy and attention in engineering field, also should be the basic principle about.Foreign literature in the description of its principle called “ a honeycomb three-dimensional restriction system, can significantly improve the ordinary filling materials in bearing and insect pest control performance of applications in a wide range.” The key principle of it is three-dimensional limit.As we all know, when the car traveling in the desert, will be out of two deep ruts, preed part deeply sunken, rutting on both sides will be high uplift.The rear of the vehicle if it continues along the rut forward, subsidence will sink further, uplift part will further uplift, until the uplift part to rub the car chais, subsidence of rutting buried half a wheel, and unable to move forward.So, is because when the load acting on the ground surface, on the basis of the theory of Plant M and Taylor's Theory: under concentrated loads, the sinking active region 1 compreion, and the force to both sides to break the transmiion to the transition zone 2, zone 2 and over to the paive zone 3, paive area will occur without limit the deformation and uplift.That is to say, once loads acting on the subgrade, the active area shape of wedge in lower load will be formed, it is extruded through the transition region, so that the paive region was uplifted.That is to say, the bearing capacity of the foundation of the decision by the initiative, the shear stre along the slip line and mobile transition, paive three regional force.Not only the real
proce of experience is very obvious to the above principle in sand base, in the soft base road will alsofind this model, but in the sand than changes in its formation rate is slow.Even if the roadbed material better still cannot avoid its lateral movement.Highway subgrade are generally higher than the ground several meters, water boiling is not easy, but the long-term settlement still exist.Investigate its reason, rainwater infiltration, material lo, base subsidence was part of the reason, subgrade and pavement under wheel load, long rolling vibration under the action of lateral displacement of subgrade section, material to the two sides can not be denied is another very important reason.In our province all levels of highway as an example, there are the main lanes in the road can clearly feel the pavement has been out a “ S ” type groove band.Part of the highway is no exception, the car in the driveway jolts obviously strong driving in the overtaking with feeling, especially in the bridge connecting segment(commonly known as the “ bridgehead ”).The gutter subgrade settlement is a typical material of subgrade transverse slip.工程中常规处理路基的方法无需赘述，其目的就是提高地基材料的抗剪力和摩擦力，减少或延缓地基材料在荷载的压力或震动作用下发生移动的能力，因而工程中对材料的要求必然有许多苛刻的限制，如果不能就近获取所需材料，就需要外购这些材料，购买材料的费用和运输费用占去整个工程成本的很大部分。而使用土工格室就可以就地或就近取材，甚至可以使用在常规情况下不能使用的材料，从而大幅度减少材料购置费用和运输费用。为什么会这样http:///http:///http:///http:///
