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CN-122014007-A - Closed protective door frame system for dynamic isolation of track area and station construction area

CN122014007ACN 122014007 ACN122014007 ACN 122014007ACN-122014007-A

Abstract

The invention discloses a closed protection portal system for dynamically isolating a track area from a station construction area, which is erected above a bottom plate of a underground excavation station and spans the track area, and comprises a plurality of modularized portal units which are arranged in parallel and a protection net which covers the outer side of the modularized portal units, wherein the modularized portal units are supported by upright posts, cross beams and corners to form a portal structure, the bottoms of the upright posts are fixed with the bottom plate of the station through detachable bottom plate connecting pieces, the upright posts are detachably connected with the cross beams, the upright posts are used as template supporting frames for non-standard section negative two-layer side wall concrete operation, and the upper surfaces of the cross beams bear station structure construction scaffolds, and the adjacent portal units are connected through longitudinal connecting rods to form an integral protection gallery. The invention realizes the totally-enclosed hard isolation of the track area, integrates protection and construction support functions, is quickly assembled and disassembled by modular design, adapts to dynamic construction, improves the safety and efficiency of cross operation, shortens the construction period and reduces the cost.

Inventors

  • MAO YUFEI
  • SUN GUORU
  • WANG XIAOMING
  • LIU GUOTAO
  • Wen Shinian

Assignees

  • 中电建铁路建设投资集团有限公司
  • 中电建(青岛)建设有限公司

Dates

Publication Date
20260512
Application Date
20260213

Claims (9)

  1. 1. A closed protective portal system for dynamically isolating a track area from a station construction area, erected above a sub-excavated station floor and spanning the track area, comprising: A plurality of modularized portal units (1) arranged in parallel, and a protective net (2) covered on the outer sides of the modularized portal units; The modularized portal frame unit (1) comprises two upright posts (11) which are vertically arranged, a cross beam (12) which is connected with the tops of the two upright posts (11), and corner supports (15) below the cross beam (12) to form a portal structure; The bottom of the upright post (11) is provided with a bottom plate connecting piece (13) for being detachably fixed with the station bottom plate; The top of the upright post (11) and the lower part of the cross beam (12) are respectively provided with a beam plate connecting piece (131) for installing and detaching the upright post (11) and the cross beam (12); the upright post (11) is used for a formwork support frame system when the non-standard section negative two-layer side wall concrete is constructed; The upper surface of the beam (12) is provided with a supporting plane for bearing the scaffold (3) for construction of the upper station structure; Two adjacent modularized portal units (1) are connected through a longitudinal connecting rod (14) to form an integral stable protection corridor.
  2. 2. The closed type protective portal system for dynamically isolating a track area from a station construction area according to claim 1, wherein the top of the cross beam (12) is provided with first positioning structure structures (121) at intervals along the length direction thereof for limiting the horizontal displacement of the bottom support (33) of the scaffold upright (31), and the side surface of the upright (11) is provided with second positioning structure structures (111) vertically oriented to the distribution beam.
  3. 3. The closed protective portal system for dynamic isolation of a track area from a station construction area according to claim 2, wherein the first positioning structure (121) is a limiting clip or a vertical short bar welded to the top surface of the cross beam (12); The second positioning structure (111) is a positioning angle iron welded on the side surface of the upright post (11) and is used for placing the vertical distribution beam.
  4. 4. The closed protective portal system for dynamic isolation of a track area from a station construction area according to claim 1, characterized in that the floor connection (13) is a connection plate with bolt holes, fixed to the station floor by means of anchoring high-strength bolts; the upright post (11) and the cross beam (12) and the longitudinal connecting rod (14) and the modularized portal frame unit (1) are all connected by adopting the high-strength bolts in a disassembling mode.
  5. 5. The closed protective gantry system for dynamic isolation of a track area from a station construction area according to claim 1, further comprising a gantry mounting spreader (4), the gantry mounting spreader (4) comprising: A walking frame (41) capable of straddling and temporarily fixing to the cross beam (12) of the modular gantry unit (1) installed; And the lifting mechanism (42) is arranged at the front end overhanging part of the walking frame (41) and is used for lifting the gantry mounting lifting appliance (4) component to be mounted.
  6. 6. The closed protective portal system for dynamic isolation of a track area from a station construction area according to claim 5, wherein the walking frame (41) comprises two side sills (411) arranged in parallel, the distance between the two side sills (411) is matched with the longitudinal distance of the modular portal unit (1), and a U-shaped buckle (412) for being clamped on the cross beam (12) is arranged below the side sills (411).
  7. 7. The closed protective portal system for dynamic isolation of a track area from a station construction area according to claim 1, wherein the protective screen (2) is a steel wire mesh with mesh aperture not more than 50mm x 50mm and is connected to the modular portal unit (1) by means of lashing or hooking.
  8. 8. The closed protective portal system for dynamic isolation of a track area from a station construction area according to claim 2, characterized in that when the preset position of the scaffold upright (31) is dislocated from the cross beams (12), a longitudinal distribution beam (5) is provided that is erected on top of two adjacent cross beams (12), the scaffold upright (31) being supported on the longitudinal distribution beam (5) with a jacking (32) back-fastened; when the upright post (11) is used for non-standard section negative two-layer side wall concrete operation, when the preset position of the horizontal support is staggered with the upright post (11), vertical distribution beams (6) erected on two adjacent upright posts (11) are arranged, the horizontal support (7) is supported on the vertical distribution beams (6) by a horizontal support (71), and the horizontal support mode of reinforcing the mouth support through a rail-mounted area can be adopted temporarily.
  9. 9. The closed protective portal system for dynamic isolation of a track area from a station construction area according to claim 8, wherein the longitudinal distribution beams (5) and the vertical distribution beams (6) are double-spliced channel steel or double-spliced i-steel.

Description

Closed protective door frame system for dynamic isolation of track area and station construction area Technical Field The invention relates to the technical field of underground engineering construction safety protection, in particular to a closed protection portal system for dynamically isolating a track area from a station construction area. Background In the construction of urban subway underground excavation stations, the situation that the section shield/TBM equipment needs to pass through the stations which are not finished to go through the stations and start occurs often, and at the moment, two high-risk operations of equipment passing and station structure construction exist in the stations at the same time, so that a vertically crossed three-dimensional operation surface is formed. For example, chinese patent application number CN202311273773.2 discloses a protective isolation device and structure for existing detachable wall in subway rail-facing area, and relates to the technical field of rail traffic engineering. The plugging plate comprises a top connecting plate, a bottom groove plate, a mounting frame and a plurality of plugging plates, and further comprises an embedded fixing connecting plate, wherein the embedded fixing connecting plate is connected with the mounting frame, the mounting frame is arranged at the two ends of the bottom groove plate close to the bottom of the mounting frame, the plugging plates are arranged in parallel and connected, two sides of the plugging plates are respectively connected with 2 mounting frames, and two ends of the bottom of the top connecting plate are respectively connected with the tops of the 2 mounting frames. The protection isolation device is arranged on the outer layer of the detachable wall body in a covering mode, a subway equipment area and a rail line area are divided into a protected area and a non-protected area, and construction operation can be independently carried out in the two areas without mutual interference. The plurality of protection isolating devices are connected and installed, so that the problems that the protection isolating devices are heavy and inconvenient to assemble and install due to overlarge single protection isolating device can be effectively reduced, and the construction speed is improved. For another example, chinese patent application No. CN202310792592.4 discloses an isolation structure and method for over-standing construction. The isolation structure for the station crossing construction comprises transverse steel beams and main steel beams which are transversely arranged and longitudinally arranged, and is characterized in that isolation film structures are arranged on the transverse steel beams and the main steel beams, the lower ends of the isolation film structures are connected with dense-mesh safe green nets, the lower ends of the dense-mesh safe green nets are connected with vertical hard isolation structures, and the vertical hard isolation structures are located on the inner sides of platforms. Compared with the prior art, can construct during the train operation, set up the back of finishing, possess isolation and the safety protection nature of high demand, fully kept apart with the track district for the construction does not influence each other with the train operation in the station, has improved work efficiency and has improved construction safety. For another example, chinese patent application No. CN202221338719.2 discloses a highway over-span existing railway protection shed frame device, where the highway over-span existing railway protection shed frame device is in an n shape, the top of the highway over-span existing railway protection shed frame device is located at the same level with the top of the highway bridge pier, the highway over-span existing railway protection shed frame device includes a protection shed frame foundation, a protection shed frame body and a protection shed frame ceiling, the protection shed frame body is formed by fixedly connecting a plurality of vertical uprights and cross bars with F level, the bottoms of the uprights are connected with the protection shed frame foundation through a lower support of the pipe frame, and the tops of the uprights are connected with the protection shed frame ceiling through an upper support of the pipe frame. The traditional protective measures are mainly to adopt temporary steel pipe railings and safety nets for area separation, have insufficient protective strength, cannot effectively resist objects with certain quality such as scaffold pipes, steel bars, tools and the like which are possibly fallen in the upper construction, form a great threat to the safety of large-scale precise equipment and personnel passing below, have poor stability, are not reliably connected with a main structure, are easy to knock down, cannot serve as a reliable supporting foundation for the upper scaffold to set up, limit the depth of cross operatio