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With the continuous deepening of urban modernization, urban underground pipelines (such as sewage pipelines, water pipelines, gas pipelines, heat pipelines, power cables and communication cables, Etc.) will become more and more dense, forming a huge underground pipeline network system. Since the service life of all pipelines is limited, when they are used for a certain period of time, they will …

The construction process of horizontal directional drilling can generally be divided into three steps: pilot hole drilling, pre-expanding, and pipeline pulling back. The quality of the pilot hole trajectory directly affects the size of the pullback force, and the risk avoidance of directional crossing is largely reflected in the construction process of directional drilling. Daher, only by mastering advanced steering …

With the development of trenchless pipeline construction technology, the problem that large-scale slope excavation or support excavation cannot be carried out in the main urban area has been solved. This paper mainly studies the application cases of pipe jacking and directional drilling and hosting technology in hydraulic engineering in trenchless pipeline construction technology, and analyzes the cost of the two …

Sliplining ist die einfachste Methode, die für die bauliche und nichttragende grabenlose Instandsetzung von Rohrleitungen eingesetzt werden kann. Diese Methode wurde verwendet, um die beschädigte Rohrleitung in 1940. Die Erfahrung von mehr als 70 Jahre zeigen, dass es sich bei der Interpenetrationsmethode um eine Art Rohrleitungserneuerungstechnologie mit guter technischer und wirtschaftlicher Effizienz handelt, and has all the advantages of trenchless …

Direktionale Horizontalbohrungen (HDD) ist eine Methode der unterirdischen Versorgungsinstallation, bei der ein Bohrgerät verwendet wird, um ein Loch horizontal durch Boden oder Gestein zu bohren. HDD-Rigs sind unverzichtbare Werkzeuge für viele Bauprojekte, insbesondere solche mit grabenloser Technologie. Hier ist eine Anleitung für Anfänger zur Verwendung von 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. wie auch immer, 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. Daher, 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 …