Determination of the size of the seal zone and the pressure of the soil on underground communications in the process of deformation of the soil by the wedge tip

• Main Authors: Alexander Posmituha, Svyatoslav Kravets, Vladimir Suponyev, Yevhenii Kulazhenko
• Format: Article
• Language: English
• Published: PC Technology Center 2018-05-01
• Series: Tehnologìčnij Audit ta Rezervi Virobnictva
• Subjects: trenchless technology; static perforation of soil; sealing zone; soil pressure; engineering communications
• Online Access: http://journals.uran.ua/tarp/article/view/146626

The object of the study is a working element with a wedge tip for static perforation of the soil with the laying of several cases for underground utilities. One of the problems that require research is the laying, location and proximity of various types of underground utilities, laid trenchless way. The study of the zone of influence of working bodies on the ground and communication will give us the opportunity to more efficiently design the use of underground space, to reduce the risks of damage to or destruction of communications and reduce the cost of the work. Studies are based on the law of conservation of mass before and after compaction of the soil with a wedge tip and on the basic theories of soil mechanics. This allows you to determine the pressure of the soil on the working element and on the communication, located nearby. The result obtained in the work shows that the pressure value is not the same in different directions of the wedge working element. It is also proved that the number of cases, which are simultaneously laid, have little effect on the zone of elastic-plastic deformation of the soil. These effects make this form of hole indispensable when you need to simultaneously lay several, more than 3, cases, compared to the traditional conical-cylindrical tip. To determine the soil pressure on underground utilities were used only the size of the working elements, and data that are easy to determine – the type and density of soil, humidity, porosity and other standardized characteristics. The use of this method has a significant advantage over other methods, which are based on empirical relationships that are either difficult to determine or their reliability is questionable. Due to the reduction of the cross-sectional area of the deformable soil, the wedge working body is indispensable for stretching the group of cases.