Auxiliary device for shield tunneling machine to reach receiving position and auxiliary receiving construction method

Abstract

The invention relates to an auxiliary for a shield tunneling machine to reach a receiving position, and relates to an auxiliary receiving construction method. In the auxiliary device, a bottom framework is welded at the bottom of a barrel in a cylindrical shape, with a back end cap being a planar cap; an edge flange of the back end cap is connected with an end flange of the barrel through a bolt; a transitional connecting ring is connected with one end of the barrel opposite to the back end cap through a flange; the transitional connecting ring is used for being connected with a central portal plate; and the back end cap is provided with a material inlet-outlet gate, a pressure meter, and a grouting-discharging hole having a valve. A reaction frame of a back gauge positioning component is used for being welded with an embedded part in the construction site. An obliquely supporting element is located on one side of the reaction frame opposite to a sleeve, is supported by a rigid prefabricated element in the construction site, and presses against the reaction frame. Supporting columns are firmly supported among the reaction frame, the end of the barrel and the back end cap. A delivery pipeline of a filler component extends from the ground to a feed port on the upper side of the barrel; and the delivery pipeline is connected with the barrel by a flange.

Description

technical field [0001] The invention relates to an auxiliary device for reaching receiving of a shield tunnel boring machine and a construction method for auxiliary receiving. Background technique [0002] With the rapid development of the country's economy and the continuous acceleration of urbanization, urban rail transit has also achieved unprecedented development. Shield method construction has become the preferred construction method for urban subway construction due to its safety and high efficiency. However, due to the ever-changing engineering geology, the engineering risks faced by the shield tunneling method are also different. Especially when the shield tunneling starts and arrives, the engineering risks faced have become one of the important risk sources in the entire construction process. Among the many shield tunneling engineering accidents that have occurred, the geological conditions of the portal are the most common in the silty sand layer with poor stabilit...

AI Technical Summary

Problems solved by technology

Among the many shield tunneling engineering accidents that have occurred, the geological conditions of the portal are the most common in the silty sand layer with poor stability, high permeability coefficient, and rich water content. Although relevant reinforcement measures have been taken for the portal, the Accidents of leakage or even tunnel door collapse when the shield arrives in this stratum are still common

Images