The pilot hole is the first step in the construction of trenchless engineering, followed by reaming. Managed jobs are based on this. Whether the quality of the guide hole, such as the turning radius of the deflection section, the smoothness of the trajectory curve, and the position of avoiding underground obstacles, is directly related to the success or failure of …
In the construction of long-distance horizontal directional drilling through pilot holes, due to the large frictional resistance between the drill string and the hole wall, the rotation of the drill bit obviously lags behind the rotation of the drilling rig power head, which makes it difficult to control the downhole tool face angle. , so that the steering accuracy is …
More recently, the industry has introduced systems that allow the installation of folded plastic pipe relining products through manhole entrances. These systems, known as FFP systems, utilize thermoplastics that have been deformed from a circular shape (i.e. folded) to produce a smaller net cross-section that can Easily feed it into existing sewers. These FFP products are typically extruded PVC or …
1. Classification and performance of mud 1.1 Classification China’s bentonite resources are very rich, including calcium-based bentonite and sodium-based bentonite, in addition to hydrogen-based, aluminum-based, sodium-calcium-based and unclassified bentonite. Bentonite, also known as bentonite, etc., is a clay rock with montmorillonite (also known as microcrystalline kaolinite, kaolinite) as the main component – montmorillonite clay rock, often containing a small amount …
Pipe Jacking Scope 1. It can be widely used in municipal, telecommunication, electric power, gas, tap water, heat and other pipeline projects. 2. Urban and rural trenchless horizontal directional drilling power piping project, and open excavation power piping project. 3. Urban and rural trenchless horizontal directional drilling sewer and sewage pipe works. Industrial wastewater discharge project. Benefits of pipe jacking …
With the continuous advancement of urbanization in China, the age of drainage pipelines is increasing year by year, and the administrative departments have gradually strengthened supervision over the construction of pipeline networks. However, judging from the results of the construction and actual operation of drainage pipelines, after a large number of buried pipelines have been put into operation for several …
Pipeline trenchless repair, mechanical spiral winding repair, Jiangsu Nanpai pipeline trenchless mechanical spiral winding repair, on-site construction. Make pipeline defects invisible, check pipeline ruptures, deformations, dislocations, collapses, and cracks. The optical focusing function is better, and the built-in light source of the lens is strong enough to observe the inside of the pipe. Excavation-free repair for environmental protection dredging detection …
(1) Process characteristics The lining method repair technology adopts the method of repairing without excavation at all, and will not damage the environment around the original pipeline. The construction operation can be carried out only by using the inspection well, which covers a small area and has few safety measures, and does not require personnel to enter the construction. Pipeline, …
I. Introduction Pipeline repair technology has mainly emerged with the aging of urban infrastructure. Urban water supply and drainage, gas and other pipeline systems, like other old structures, are more and more likely to be damaged. The pipelines are deeply buried and invisible, and it is impossible to understand the specific conditions of the underground pipelines to a certain extent, …
At present, the repair methods for municipal pipelines are mainly divided into two categories: excavation repair and trenchless repair technology. Excavation repair is a relatively traditional construction method. With the continuous advancement of technology, trenchless repair technology first appeared in developed areas. Because of its many advantages that traditional excavation technology does not have, it is gradually popularized and applied. …
How to deal with the mud generated by trenchless pipe jacking construction? In terms of urban construction, we are increasingly adopting trenchless pipe jacking construction technology, through steering, directional drilling and other means, in the case of excavation of a very small part of the surface (generally refers to small area excavation at the entrance and exit) , The construction …
During the use of the horizontal directional rotary mud pump, various problems may occur, and these 6 types of failures are the most common. Fault 1: The pump does not absorb water Sometimes, during the use of the mud pump, the mud pump does not absorb water due to insufficient filling water and the inability to discharge the air in …
