Sliplining is the simplest method that can be used for structural and non-structural trenchless repair of pipelines. This method was used to renew the damaged pipeline in 1940. The experience of more than 70 years shows that the interpenetration method is a kind of pipeline renewal technology with good technical and economical efficiency, and has all the advantages of trenchless …
Horizontal directional drilling (HDD) is a method of underground utility installation that uses a drilling rig to bore a hole horizontally through soil or rock. HDD rigs are essential tools for many construction projects, especially those involving trenchless technology. Here’s a beginner’s guide on how to use HDD rigs. Equipment Needed To use an HDD rig, you will need the …
This issue mainly introduces the TV detection and sonar detection technology in the pipeline detection method. TV detection is mainly suitable for detection when the water level in the pipeline is low, and it can comprehensively check the structural and functional conditions of the drainage pipeline. Sonar testing can only be used to detect underwater objects. It can detect mud …
Pipe jacking construction technology has become an indispensable part of the current municipal engineering with a series of advantages such as small impact on the environment and saving manpower. However, due to the pipe jacking construction technology, additional stress field is generated in the surrounding soil, resulting in changes in mechanical properties such as loading and unloading, causing soil disturbance. …
Any kind of trenchless construction technology, if there is no standard to regulate, or if the construction is not in accordance with the standard, quality problems may occur. Although we are vigorously promoting CIPP repair technology, we cannot take potential quality problems lightly. Recognizing the possible problems in this method will help us to further improve the technology and improve …
When the pipeline is buried in quicksand layer or soft soil layer, the pipeline foundation is vulnerable to instability and fracture, causing interface disconnection and leakage, causing soil and water loss around the pipeline, pipeline sinking and damage, and road surface collapse. Therefore, to ensure the quality and long-term effect of pipeline repair, the pipeline foundation and surrounding soil must …
The spiral pipe jacking machine is a kind of equidistant spiral rod for mud discharge of roadheader head, including a cylinder, a spiral rod, a spiral vane group fixed on the spiral rod and a mud discharge pipe. The cylinder and the mud discharge pipe are sleeved outside the spiral vane group. The spiral vane group includes several spiral vanes …
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 …
