Counter-force system for rectangular shield tunneling

Abstract

The invention provides a counter-force system for rectangular shield tunneling. The counter-force system is arranged inside an original well and comprises a counter-force frame, an opened negative ring, a closed negative ring system and a steel beam, wherein the counter-force frame, the opened negative ring and the closed negative ring system are connected in sequence in the direction of shield tunneling, the counter-force frame is fixedly arranged on the side wall of the original well, opposite to the opening of the original well, the closed negative ring system penetrates through the opening of the original well, the steel beam is located on the inner side of the opened negative ring, and the two ends of the steel beam are connected with the closed negative ring system and the counter-force frame respectively. Due to the introduction of the unique closed negative ring system and steel beam, the whole system is clearly stressed, the structure is more stable, and the steel beam does not need to be machined every time to meet the length demand; meanwhile, due to the fact that the number of counter-force steel supports is reduced, the allocation and transportation space of construction materials is increased. The counter-force system suitable for the rectangular shield tunneling is provided.

Description

technical field [0001] The invention relates to an improvement of a shield tunneling construction, in particular to a reaction force system for a rectangular shield tunneling. Background technique [0002] During the construction of shield tunneling, part of the negative ring segment in the initial working shaft usually needs to be set as an open negative ring for lifting construction materials and equipment, and a steel ring and 4 steel supports are installed on the upper part of the open negative ring to transfer Reaction force. [0003] In the construction of rectangular shield, if the steel ring and steel support are still installed on the upper part of the open negative ring according to the conventional method, on the one hand, due to the different starting conditions of the shield each time, the connection position of the steel support and the steel ring is different, resulting in The force of the steel ring is uncertain, which brings difficulties to the design of th...

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Problems solved by technology

[0003] In the construction of rectangular shield, if the steel ring and steel support are still installed on the upper part of the open negative ring according to the conventional method, on the one hand, due to the different starting conditions of the shield each time, the connection position of the steel support and the steel ring is different, resulting in The force of the steel ring is uncertain, which brings difficulties to the design of the steel ring. On the other hand, because some steel supports need to be set as oblique supports, the length of the oblique steel supports varies with each connection position, resulting in steel The support needs to be processed each time, or when the length of the steel support is insufficient, a steel plate is added behind the steel support, which will cause certain safety hazards to the construction of the shield hole. Moreover, since multiple steel supports are set on the upper part of the negative ring of the opening, It also occupies part of the construction material lifting space

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