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 …
In recent years, with the continuous innovation and maturity of the trenchless repair technology for buried pipelines, more and more industrial enterprises choose to use the trenchless method to replace the traditional method of excavation and replacement of new pipes for pipeline repair and renewal. So how to choose the appropriate method among the wide variety of trenchless repair methods, …
Trenchless drilling rigs use high-pressure water jets to cut holes in soft ground. The directional drilling bottom drilling tool is composed of an elbow joint and a drill bit with a nozzle. Drill string back to straight hole. If the drill string does not rotate, under the action of feed force and water jet, a directional arc hole can be …
Underground pipelines play an important role in production and life. With the passage of time, due to corrosion, long operating years and other reasons, the pipeline will inevitably have various damages and leaks, so it needs to be repaired and even replaced. In addition, the whole line is replaced with new pipelines, which is not only a huge amount of …
With the aging and damage of the drainage pipes laid and used in the early stage, the trenchless repair of the pipes and the renewal of the pipes have gradually become the more prominent problems currently faced. With the continuous advancement of the modernization process, the underground pipelines have become increasingly complex, and the load of the roads has become …
