Blast construction method for penetrating complex building group by submarine tunnel at land region section

Abstract

The invention discloses a blast construction method for penetrating a complex building group by a submarine tunnel at a land region section, and aims to solve the problem of a particular construction process that the fractional blasting frequency and the maximum section explosive charge are not determined according to a vibration velocity control index and measured indexes in the prior art. The method comprises the following steps of: measuring a geological coefficient K and a vibration damping index a of a rock body at a construction engineering land section; selecting a vibration monitoring scheme; calculating the maximum section explosive charge; punching on a tunnel face to form periphery holes, cut holes and tunneling holes; machining bamboo sections, wooden sticks or a water stemming material, of which the diameter is less than that of the periphery holes serving as blast holes, into objects with lengths of 5 to 10cm and assembling the machined objects into the hole bottoms of the periphery holes serving as the blast holes; binding the machined objects by an air-spaced binding method to form a blasting cartridge strip, inserting the blasting cartridge strip into the periphery holes serving as the blast holes and sealing the periphery holes with the stemming material; forming the wedged cut holes; and performing the blasting on the tunnel face. A simple, safe, economic and practical construction method is provided for penetrating the building group by a long and big tunnel by controlling the blasting vibration.

Description

technical field [0001] The invention relates to a blasting and vibration construction method for a long tunnel passing through building groups, in particular to a blasting construction method for a subsea tunnel passing through complex building groups in a land section. Background technique [0002] With the continuous development of social economy and the continuous expansion of urban scale, the contradiction between the rapid expansion of urban population and limited space resources has become increasingly acute. Studies have shown that the development of underground space equivalent to 1 / 3 of the total area within a depth of 30m is equivalent to the area of ​​all urban ground buildings. Therefore, the governments of various countries pay more attention to the utilization of underground space, and regard it as the main method to solve the contradiction of urban intensification. Competing to develop urban underground rail transit projects, urban underground highway traffic...

AI Technical Summary

Problems solved by technology

[0011] The invention provides a blasting construction method for subsea tunnels passing through complex building groups in the land area, which solves the specific problem in the prior art that the number of blasting times and the maximum charge amount of the section are not determined according to the vibration velocity control index and the index obtained from the test. technical problems in construction

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