During the construction and use of underground pipelines, due to continuous or discontinuous physical, chemical, biochemical and biological erosion, defects of different degrees often occur. The types of pipeline defects include pipeline leakage, pipeline blockage, pipeline displacement, mechanical wear, pipeline corrosion, pipeline cracks, pipeline rupture and pipeline collapse, etc. There are many reasons for pipeline leakage, generally speaking, there are …
The point CIPP repair technology is similar to the in-situ curing pipeline repair technology (CIPP), and also uses the same or similar materials. It is mainly used to repair partially damaged pipelines and has been applied for more than 30 years. During construction, the short liner is wrapped on an expandable roller and pulled into the site to be repaired …
When the water supply pipeline passes through railways, highways and river valleys, certain measures must be taken. When the pipeline crosses the railway, its crossing location, method and construction method shall strictly comply with the provisions of the technical specifications of the railway department for crossing the railway. According to the importance of the railway, the following measures shall be …
The basic function of HDD drilling rig is to realize guided feeding, rotation and reaming pullback, rotation and long-distance pullback of the lifeline to be laid, and at the same time provide a carrier for the angle adjustment of the trajectory. Drilling tools mainly include drill rods, screw drilling tools, transfer cases, etc., to achieve effective transmission of force and …
Construction characteristics of horizontal directional drilling 1. Directional drilling crossing construction will not hinder traffic, damage green space, vegetation and buildings, and affect the normal life and work order of residents. 2. Modern crossing equipment has high crossing accuracy and is easy to adjust the laying direction and burial depth. 3. The buried depth of urban pipe network is generally …
Because the existing pipelines in the city’s underground are criss-crossed, the pipelines are heavy, chaotic and dense, forming artificial underground obstacles, which brings difficulties and risks to the trenchless construction. The situation of causing economic losses occurs, so the underground pipeline detection of the construction site must be carried out before the trenchless construction. So what are the trenchless pipeline …
In the process of gas pipeline construction, due to the existence of some obstacles, the construction difficulty has increased. In this context, many gas companies have paid more and more attention to the horizontal directional drilling technology, which has gradually become one of the most important technologies at present. First, based on this, the research in this paper has certain …
The earliest forms of underground utility lines required trenches to be dug before pipes, lines, and cables were laid. Not only is this a laborious and time-consuming process, it becomes even more difficult in areas where production lines already exist. The practice of Horizontal Directional Drilling (HDD) began in the 1970s as a means of reducing the cost of installing …
With the rapid development of cities and the continuous expansion of the underground pipeline network, a large number of underground pipelines have been laid for a long time, and now they are facing the problem of reaching or approaching the service life. There are many drawbacks in the traditional excavation repair and pipeline replacement technology, which leads to the high …
With the acceleration of the urban process in my country, the construction scale of underground pipelines is getting larger and larger, and the awareness of environmental protection of the whole people has been enhanced. The pipe jacking technology plays an increasingly important role in the construction of underground pipelines. It can pass through urban roads, ground buildings, underground structures and …
