Shield starting counter-force base

Abstract

The invention relates to a shield starting counter-force base, which comprises a counter-force foundation base (1) and an annular supporting pier (2); the annular supporting pier (2) is arranged on the counter-force foundation base (1); and the counter-force foundation base (1) and the annular supporting pier (2) have reinforced concrete structures. By the shield starting counter-force base, the requirements of a shield machine on installation, safety starting and normal tunneling construction in a vertical well are met. The shield starting counter-force base has the advantages that: (1) a series of problems that the scale of the vertical well is expanded, the investment is increased, the construction period is delayed, the contract is changed and the like due to the 2-meter lengthening of the shield machine are avoided; and (2) the shield starting counter-force base can substitute for the conventional counter-force rack, meet the requirements of the shield machine on assembly and starting in the vertical well, is favorable for reducing the scale of the vertical well and saving the engineering investment, and can be popularized in the similar engineering.

Description

technical field [0001] The invention relates to a starting reaction force seat of a shield machine, which is a reinforced concrete structure for carrying the reaction force when the shield machine starts out. Background technique [0002] In order to provide the reaction force for the shield machine to move forward, it is necessary to set up a reaction frame. The reaction frame used in the current project is a steel structure in the shape of a well on the vertical plane; in order to bear a strong reaction force, it needs to have sufficient rigidity. Therefore, a diagonal brace needs to be added behind the reaction frame, so the vertical space of the reaction frame is 2m~3m. Since the underground excavation of the shield machine requires a certain burial depth, the departure shaft is usually formed first, then assembled in the well, and then the reaction force is provided by the reaction frame to start. [0003] The first phase of the South-to-North Water Diversion Middle Ro...

AI Technical Summary

Problems solved by technology

If the Yellow River Crossing Project is implemented according to this plan, the project investment will not only greatly increase, but also because the blind hole is buried about 40m deep and the groundwater level is high, it will be difficult to form the hole without special excavation equipment, and the construction period will be greatly delayed, which is also not advisable.

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