Pipe-jacking construction method for large section of complicated formation

Abstract

The invention discloses a pipe-jacking construction method for a large section of a complicated formation. The pipe-jacking construction method for the large section of the complicated formation comprises the steps of control of settlement of existing structures in a pipe-jacking construction process, control of construction parameters during jacking in different geological formations, control ofjacking in a formation which is soft in top and hard in bottom, control of jacking in a hard rock stratum and line-type control in curve pipe-jacking and process. A seam at a curve pipe-jacking jointmeets the requirement, it ensures that water does not leak from a seam between pipes, the engineering quality is ensured, a jacking pipe can successively downwards penetrate through a high-speed waterguiding pipe and a sewage pipe, the safety of various structures is ensured, it can be ensured that settlement of a pipe-jacking line is in a controlled state, potential safety hazards are reduced, settlement can be controlled effectively, the jacking pipe can safely and smoothly penetrate through the formation, the safety of opening a bin for changing a knife can be ensured, and smooth jacking of a pipe-jacking machine under the condition of hard rocks is ensured.

Description

technical field [0001] The invention relates to the technical field of pipe jacking construction, in particular to a large-section pipe jacking construction method in complex formations. Background technique [0002] The early pipe jacking construction work was completed in the United States between 1896 and 1900, and then the technology was gradually determined by many railway companies as the standard method for jacking cast iron pipes under the railway. Because of the addition of relay rooms in the pipe jacking section, the jacking length has also developed from less than 100m in the early stage to more than 1000m. The sewer pipe jacking project in Hamburg, Germany in 1970 was the first concrete pipe jacking project over a kilometer in the world. At present, the development of large-section pipe jacking in Japan, Germany and other countries is relatively mature, and the diameter of pipe jacking can reach 4-5 m. [0003] The earliest construction of pipe jacking technolo...

AI Technical Summary

Problems solved by technology

At present, the maximum diameter of pipe jacking construction in my country has reached 4 m, but the overall diameter of pipe jacking construction is not large, especially in hard limestone.