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Adjustable propulsion mechanism for soil pressure balance type shield

A technology of earth pressure balance and propulsion mechanism, which is applied in the direction of earth drilling, mining equipment, tunnels, etc., can solve the problems of narrow applicable geological range and inability to solve shield tunneling, and achieve the effect of increasing the geological applicable range

Inactive Publication Date: 2011-06-29
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the existing non-partitioned and partitioned systems cannot solve the unbalanced load phenomenon caused by the special geological conditions or self-weight and direction-changing load of the shield; at the same time, because the distance between the shield propulsion hydraulic cylinders is not adjustable, the Applicable geological range is narrow

Method used

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  • Adjustable propulsion mechanism for soil pressure balance type shield
  • Adjustable propulsion mechanism for soil pressure balance type shield
  • Adjustable propulsion mechanism for soil pressure balance type shield

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Embodiment Construction

[0018] The technical solutions of the present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

[0019] Such as figure 1 As shown, the present embodiment mainly includes a propulsion jack 7, an intermediate joint 4, a dial 6, a chute partition 5, and a brace 8. Among them, the left end of the propulsion jack 7 is fixedly connected to the right end of the middle joint 4, the left end of the middle joint 4 is slidingly connected with the chute partition 5, the chute partition 5 is fixedly connected with the dial 6, and the chute partition 5 is fixedly connected with the shield shell 2 , the propulsion jack 7 is supported on the segment 9 through the support block 8 .

[0020] Such as figure 2 As shown, 12 intermediate joints 4 are arranged on the T-shaped chute 3 of the chute dividing plate 5 along the circumferential direction of the chute dividing plate 5. Taking the horizontal axis as a reference, the circumferent...

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Abstract

The invention discloses an adjustable propulsion mechanism for a soil pressure balance type shield, which belongs to the technical field of tunnel engineering. A middle junction fixedly connected with propulsion jacks are arranged on a circular T-shaped chute of a chute barrier plate; a circular disk of the middle junction is arranged in the T-shaped chute; a pressure piece, a spring and a loading piece of the middle junction are sequentially sleeved on a cylinder of a top body and pressed on the chute barrier plate by adjusting nuts; a pressure resistant hard rubber block is fixedly connected with the circular disk of the top body; the chute barrier plate is fixedly connected with a dial and a shield and one end of the propulsion jack is supported on a supporting barrier acted on a pipe piece. Because the middle junction is connected with the chute barrier plate in a sliding mode, the distance between the propulsion jacks is adjustable and the distribution of the propulsion jacks canbe optimized according to the concrete working geologic parameter of the shield and the deadweight of the shield, thereby overcoming the unbalance loading phenomenon of the shield due to special geologic conditions, or the deadweight or reversal loads. The adjustable propulsion mechanism is suitable for a soil pressure balance type shield.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, in particular to an adjustable propulsion mechanism for an earth pressure balance shield. Background technique [0002] In recent years, in Asia, Europe and the United States, the earth pressure balance shield construction has the characteristics of small impact on the ground and underground environment, fast excavation speed, and small surface settlement, and has been widely used in the construction of urban underground tunnels. Especially in my country, the use ratio of earth pressure balance shield is the highest. [0003] The propulsion system is a key component of the earth pressure balance shield, which mainly undertakes the jacking task of the entire shield. The existing shield propulsion system is composed of equally spaced hydraulic jacks fixedly arranged on the support ring part of the shield and close to the shell of the shield. [0004] In order to reduce the complexity o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/06
Inventor 冯平法唐晓强王立平邓孔书陈旭
Owner TSINGHUA UNIV
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