Method and device for receiving pipe jacking machine under condition of high water pressure complicated geological conditions

Abstract

The invention provides a method for receiving a pipe jacking machine under condition of high water pressure complicated geological conditions. In the process when the pipe jacking machine extends out of a wall, air is charged into a receiving chamber and muddy water is discharged to always keep balance between the air pressure in the receiving chamber and the formation water pressure; after the pipe jacking machine completely goes into the receiving chamber, a sealing slurry is injected into the gap between a pipeline and the hole wall of a receiving well to seal and stop water, and the muddy water is discharged to reduce the pressure after the sealing slurry is solidified. The invention also provides a device for receiving the pipe jacking machine for the method; the device comprises an orifice pipe, a flange pipe, the receiving chamber, and a pressure stabilizing chamber, all of which are orderly and integrally connected together from back to front; an air bag is arranged in the pressure stabilizing chamber; the receiving method is suitable for various formations, in particular weak soil and sandy soil formations high in water and soil pressure at the receiving end, poor geological conditions and difficult to guarantee in reinforcement quality, and is high in receiving safety; if the device is applied to receiving the pipe jacking machine, the reinforcement to the soil at the receiving end can be reduced and even avoided; besides, the device can be recovered and reused, so that the construction cost can be reduced.

Description

technical field [0001] The invention relates to a method and device for receiving a pipe jacking machine, in particular to a method and device for receiving a pipe jacking machine under high water pressure and complex geological conditions, and belongs to the technical field of non-excavation engineering. Background technique [0002] As an important trenchless technology, the pipe jacking method has been very common in China. It has been widely used in the construction of water supply and drainage, power communication, oil and gas and other municipal and energy pipelines. Due to the high speed of pipe jacking construction, it is not harmful to the surrounding environment. The impact or impact is small, the construction site is small, the noise is low, and the advantages of being able to work deep underground will surely have a good development prospect in the next few decades. The starting and receiving of pipe jacking is the main risk stage of pipe jacking construction. In...

AI Technical Summary

Problems solved by technology

The starting and receiving of pipe jacking is the main risk stage of pipe jacking construction. In some complex situations, especially in unfavorable strata such as soft soil and sandy soil with high groundwater pressure, accidents such as water gushing and sand gushing are prone to occur. It will cause the failure of the entire pipe jacking project, and even cause the surface near the working well to collapse, threatening the safety of surrounding buildings and underground facilities

[0003] The existing pipe jacking machine receiving technology can realize the water-tight seal after the pipe jacking machine breaks the wall and exits the hole, but for the water and sand gushing accidents caused by the pressure imbalance inside and outside the wall of the receiving well opening during the process of the pipe jacking machine breaking the wall and exiting the hole And the sudden rise of pressure in the receiving cabin caused by the fast entry speed of the pipe jacking machine cannot be eliminated, and the construction safety risk is great; therefore, it is necessary to develop a pipe jacking with wide applicability, low use cost and high receiving safety. Receiver method and device

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