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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 …

With the continuous advancement of urbanization and the number of years of drainage pipelines increasing year by year, the administrative authorities have gradually strengthened the supervision of the construction of the pipeline network. However, judging from the results of drainage pipeline construction and actual operation, after a large number of buried pipelines are put into operation for several years, due …

The arrival of the heavy snow festival tells us that winter is really coming. Is the cold winter suitable for trenchless pipe jacking? If it is not suitable, what should the construction unit do when the construction period is tight? According to many years of construction experience, it is known that trenchless construction is not very suitable in winter because …

1. Technical Content Trenchless buried pipe construction technology is mainly used for pipe jacking method, directional drilling crossing technology and large section rectangular channel excavation technology. (1) Pipe jacking method Pipe jacking method is a construction method for laying pipes in soft soil or water-rich soft ground. With the continuous development and maturity of pipe jacking technology, a large number …

1. Hydraulic system part Some common fault handling table of hydraulic system Failure phenomenon Cause of issue Method of exclusion Under pressure 1. The pressure gauge is damaged Replace the pressure gauge 2. The pump speed is too low Check the diesel engine 3. Internal leakage of actuator Replace the seal of the actuator or replace the new actuator (cylinder …

1. Definition of polyurethane spraying An emerging trenchless pipeline repair technology that sprays the lining material onto the inner surface of the existing pipeline to form a lining covering layer to improve the pipeline’s pressure resistance, corrosion resistance, and wear resistance. 2. Scope of use (1) Structural repair or chemical protection of reinforced concrete pipes, brick pipes, cast iron pipes, …

Troubleshoot and solve the oil leakage of horizontal directional drilling rig 1. The overflow valve leaks oil 1. Treatment method for oil leakage at the bottom of the overflow valve: replace the sealing ring and remove the connecting bolt. 2. Treatment method for oil leakage at the back of the overflow valve: tighten the bolts with an Allen wrench. 2. …

1. Why is trenchless technology needed? Answer: (1) Pipeline laying, replacement, and repair work that passes through rivers, lakes, important traffic arteries, and important buildings without excavation. (2) Social reasons: It can solve the interference of traditional excavation construction on the normal life of residents, and the damage and adverse effects on the traffic, environment, and surrounding building foundations. (3) …

Although trenchless technology started later than other technologies, it has been developed by leaps and bounds in theory and construction techniques in recent years. Trenchless technology, as an extremely important construction method for laying pipelines, has its own unique advantages. It can avoid excavating the roadbed on the ground, and has the characteristics of low impact on related buildings and …