A deviation-correcting tool head and a method for correcting the deviation of the tool head

Abstract

The invention belongs to the field of pipe jacking construction. The existing tool head is usually corrected during the jacking process; and thus the tool head can not return to a predetermined routeonly after marching at a distance, so that a tool pipe still deviates from the predetermined route. In order to solve the problem, the invention provides an error-correcting tool head and an error correction method for a tool head. Spraying holes are formed in the head of a tool head along the peripheral direction; high-pressure water jet nozzles and guniting nozzles that can oscillate are arranged in the spraying holes, wherein the oscillating angle is equal to a number by dividing 360 degrees by the spraying hole number. When error correction is carried out, an automatic control system adjusts the directions and the spraying amounts of the high-pressure water jet nozzles and the guniting nozzles according to a deviation direction and deviation amount that are detected by a monitoring system; the excess soil is cut by using the high-pressure water jet; and the soil that is cut excessively due to deviation is supplemented by guniting. Therefore, original-position righting of the tool head is realized, so that the follow-up pipeline can carry out jacking along a predetermined route.

Description

technical field [0001] The invention relates to the field of pipe jacking construction, more specifically, it relates to a deviation correcting tool head and a method for correcting the deviation of the tool head. Background technique [0002] The tool head, also known as the tool tube, is the first part to be jacked in the pipe jacking construction. It is usually a tubular structure, and a cutter head is arranged at the end to cut the soil, and to open and lead the way for the subsequent jacking work pipe. Due to the complex geological conditions, for example, there are rocks that are difficult to cut in the soil layer, which will cause the tool head to deviate from the predetermined pipeline, which will cause the subsequent working pipe to also deviate. In order to solve the offset, an offset monitoring mechanism is usually installed inside the tool head and four correcting cylinders are evenly distributed along the circumferential direction of the head position. The corre...

AI Technical Summary

Problems solved by technology

However, the pipeline of the aforementioned distance is already in an offset state and cannot be changed. Therefore, even if the tool head returns to the predetermined pipeline, the subsequent jacking pipe will still advance along the offset path (such as figure 1 As shown), after the final pipe jacking construction is completed, the entire pipeline will have offset sections like this one after another, instead of laying along the predetermined pipeline, resulting in low project quality, and this problem needs to be improved

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