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CN-121976810-A - Reinforcing apparatus suitable for weak soil layer shield tunnel

CN121976810ACN 121976810 ACN121976810 ACN 121976810ACN-121976810-A

Abstract

The invention discloses a reinforcing device suitable for a shield tunnel of a weak soil layer, which comprises a shield body, wherein a containing cavity is arranged at the rear end of the shield body, a push-out oil cylinder is arranged in the containing cavity, a plurality of supporting components are placed in the containing cavity, the supporting components comprise supporting rods which are hinged in an interactive manner, the supporting rods are hinged to form a ring shape, the positions where the supporting rods are hinged in an interactive manner are in an interactive manner against the outer wall and the inner wall of the containing cavity, the supporting rods are of a contractive structure, a plug rod is arranged at the position where the supporting rods above the tunnel are hinged in an interactive manner, and the plug rod is plugged into the inner wall of the tunnel by pushing. The support assembly is pushed out of the accommodating cavity through the lifting rod, then clamped in the shield rear grouting layer when the pipe piece is paved, and is spread to form an annular support, so that the reinforcement strength is improved.

Inventors

  • LIU JIANYOU
  • WANG CHAO
  • CHEN HUI
  • ZOU JINFENG
  • MENG CHAO
  • HE CHUANG

Assignees

  • 中铁工程设计咨询集团有限公司
  • 中南大学

Dates

Publication Date
20260505
Application Date
20260323

Claims (7)

  1. 1. The reinforcing device suitable for the soft soil layer shield tunnel comprises a shield body (1) and is characterized in that a containing cavity (11) is formed in the rear end of the shield body (1), an pushing oil cylinder (2) is arranged in the containing cavity (11), and a plurality of supporting components are placed in the containing cavity (11); The support component comprises a supporting rod (3) which is hinged in an interactive mode, the supporting rod (3) is hinged to form an annular shape, the mutual hinged positions of the supporting rod (3) are in alternating contact with the outer wall and the inner wall of the accommodating cavity (11), the supporting rod (3) is of a contractive structure, the inserting rod (4) is arranged at the mutual hinged positions of the supporting rod (3) above the tunnel, and the inserting rod (4) is inserted into the inner wall of the tunnel through pushing.
  2. 2. The reinforcing device suitable for the soft soil layer shield tunnel according to claim 1, wherein the telescopic end of the push-out oil cylinder (2) is fixedly connected with two lifting rods (5), an avoidance channel is formed between the two lifting rods (5), and the inserting rod (4) passes through the avoidance channel.
  3. 3. The reinforcing device for the soft soil layer shield tunnel of claim 1, wherein the hinging shaft (31) is arranged at the hinging position of the supporting rods (3), one side of the hinging shaft (31) is hinged with the guide plate (32), the intrados of the guide plate (32) is provided with a guide groove, the guide groove is slidably connected with the guide rod (33), the upper end of the guide rod (33) is provided with a limit boss, and the guide rod (33) is fixedly connected with one side of the inserted rod (4).
  4. 4. The reinforcing device for the shield tunnel of the weak soil layer according to claim 3, wherein the lower end of the inserted link (4) is fixedly connected with the supporting plate (41), and the duct piece is provided with the avoiding groove (42).
  5. 5. The reinforcing device for the shield tunnel of the weak soil layer according to claim 1, wherein the supporting rod (3) comprises a hinging rod (34) and a sliding rod (35), a slot (36) is formed in one side of the hinging rod (34), the sliding rod (35) is in sliding fit with the slot (36), scraping plates (37) are fixedly connected to one side of the sliding rod (35) at intervals, and scraping plates (38) are arranged on the upper side of one end of each scraping plate (37).
  6. 6. The reinforcing device for the shield tunnel of the weak soil layer according to claim 5, wherein the bottom of the scraper (38) is provided with a clamping groove (39), the inserted link (4) is provided with a through hole (411), and a reinforcing steel bar (412) is penetrated into the through hole (411).
  7. 7. The reinforcing device for the soft soil layer shield tunnel of claim 6, wherein a damping sleeve is arranged in the through hole (411), and steel bars (412) penetrate through the damping sleeve in a damping manner.

Description

Reinforcing apparatus suitable for weak soil layer shield tunnel Technical Field The invention relates to the technical field of shield tunnel reinforcement, in particular to a reinforcing device suitable for a shield tunnel in a weak soil layer. Background Along with the development of society, underground engineering is more and more widely applied, especially in the aspect of energy, communication and municipal engineering construction, the non-excavation construction technology is more and more widely applied in subway construction, and the shield construction technology is also the leading edge technology in the non-excavation mode. The shield reinforcement of the soft soil stratum often adopts a grouting reinforcement mode, anchor rods are needed to be inserted into dense drilling holes in the circumferential direction of a tunnel, the construction progress is affected on one hand, the anchor rods support a certain aspect independently, and reinforcement differentiation exists. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides a reinforcing device suitable for a shield tunnel in a weak soil layer, so that the problems in the prior art are solved. In order to achieve the above purpose, the present invention adopts the following technical scheme: the reinforcing device suitable for the shield tunnel of the weak soil layer comprises a shield body, wherein a containing cavity is formed at the rear end of the shield body, a push-out oil cylinder is arranged in the containing cavity, and a plurality of supporting components are placed in the containing cavity; The support component comprises a supporting rod which is hinged in an alternating manner, the supporting rod is hinged to form an annular shape, the mutual hinged positions of the supporting rods are in alternating contact with the outer wall and the inner wall of the accommodating cavity, the supporting rod is of a contractive structure, the inserting rod is arranged at the mutual hinged positions of the supporting rods above the tunnel, and the inserting rod is inserted into the inner wall of the tunnel through pushing. Preferably, the telescopic end of the push-out oil cylinder is fixedly connected with two lifting rods, an avoidance channel is formed between the two lifting rods, and the inserted rod passes through the avoidance channel. Preferably, the articulated department of branch sets up the articulated shaft, and articulated connection deflector is connected to articulated shaft one side, and the intrados of deflector sets up the guide way, and the guide bar is connected in the guide way sliding, and the guide bar upper end sets up spacing boss, guide bar fixed connection in inserted bar one side. Preferably, the lower end of the inserted link is fixedly connected with the supporting plate, and the duct piece is provided with the avoiding groove. Preferably, the branch includes articulated pole and slide bar, and articulated pole one side sets up the slot, slide bar and slot slip adaptation, at slide bar one side interval fixed connection scraper blade, scraper blade one end upside sets up the scraper blade. Preferably, the bottom of the scraper is provided with a clamping groove, the inserted link is provided with a through hole, and the through hole is internally penetrated with a reinforcing steel bar. Preferably, a damping sleeve is arranged in the through hole, and the reinforcing steel bar passes through the damping sleeve in a damping manner. The invention provides a reinforcing device suitable for a shield tunnel in a weak soil layer. The beneficial effects are as follows: (1) And the support assembly at the outermost end is pushed out of the accommodating cavity through the lifting rod, then the support assembly is clamped in the shield rear grouting layer when the pipe piece is paved, the support assembly is spread to form an annular support, and the reinforcement strength is improved. (2) Through the sliding rod relative slip, scraper blade scrapes out the slot at tunnel inner wall, and the slip casting gets into behind the shield of being convenient for, cooperates the reinforcing bar on the one hand at the inserted bar of top and certainly swings down, and the reinforcing bar is brought full inserted bar swing, overcomes the hidden danger that inserted bar inclination is too big difficult to impress tunnel inner wall, and on the other hand reinforcing bar can be along with inserted bar impress in the slot, and the reinforcing bar is as the skeleton further strengthens the supporting effect. Drawings FIG. 1 is a schematic view of the basic structure of the present invention with the shield partially removed; FIG. 2 is a front view of the support assembly; FIG. 3 is a schematic view of the strut support principle of the support assembly; FIG. 4 is a schematic view of the structure in which the lifting rods support the struts of the support assembly (within the receiving cavity); FIG.