一种地铁车站明挖基坑可移动式气膜天幕系统

Abstract

本实用新型提供了一种地铁车站明挖基坑可移动式气膜天幕系统，属于基坑施工技术领域。其技术方案为：包括设置在基坑内两侧冠梁上的轨道，两侧所述轨道之间设置有可移动支撑架，所述可移动支撑架上设置有气膜，所述气膜为气肋式膜结构。本实用新型的有益效果为：灵活高效，可随施工进度调整位置与覆盖范围，避免重复搭建，减少干扰与浪费；环境适应性强，气膜材料抗风雨、耐日晒，优于易损帆布和隔热差的钢结构，保障恶劣天气下的施工质量；节能环保，材料可回收，采光通风设计降低照明能耗与碳排放。该系统综合解决了传统防护棚灵活性差、成本高、能耗大等问题，适用于现代基坑施工。

Claims

1. A movable pneumatic membrane canopy system for an open excavation of a subway station, characterized in that, It includes a track (1) set on the cap beams (22) on both sides of the foundation pit (21), a movable support frame is set between the two tracks (1), and an air membrane (3) is set on the movable support frame. The air membrane (3) is an air rib membrane structure.

2. The movable air-supported membrane canopy system for open cut foundation pit of subway station according to claim 1, characterized in that, The movable support frame includes a pair of U-shaped long plates (4) respectively arranged on the two sides of the track (1). Two rows of roller groups are arranged on the lower side of the U-shaped long plates (4). The roller groups include several rollers (9). The track (1) has a U-shaped cross-section. A pair of grooves (5) that cooperate with the rollers (9) are provided on the inner bottom surface of the track (1). The roller groups in the corresponding columns are arranged in the grooves (5) on the corresponding sides. The rollers (9) roll along the grooves (5).

3. The movable air-supported canopy system for open cut foundation pit of subway station according to claim 2, characterized in that, The air film (3) has a semi-circular arc structure after being inflated. The bottom sides of the air film (3) are respectively set on the U-shaped long plates (4) on both sides. The bottom side of the air film (3) is provided with several sets of fixing plates (13) on both sides. The fixing plates (13) are provided with limit holes. The side walls of the U-shaped long plate (4) are provided with several sets of through grooves that cooperate with the fixing plates (13). The fixing plates (13) pass through the corresponding through grooves. The side wall of the U-shaped long plate (4) is provided with a number of bolts (10) through the threaded structure, which pass through the corresponding through groove. The lower end of the bolt (10) is rotatably provided with a pressure plate (11) that cooperates with the through groove. The pressure plate (11) is slidably disposed in the through groove. The lower side of the pressure plate (11) is provided with a limiting post (12) that cooperates with the limiting hole. The pressure plate (11) is pressed against the fixing plate (13), and the limiting post (12) is stuck in the limiting hole.

4. The movable air-supported membrane canopy system for open cut foundation pit of subway station according to claim 3, characterized in that, The movable support frame also includes a pair of semi-arc-shaped fixing steel rings (2) disposed between the two sides of the U-shaped long plates (4) and cooperating with the end face of the air film (3). The pair of fixing steel rings (2) are respectively disposed at both ends of the U-shaped long plates (4). Several sets of fixing plates (6) are provided on both sides of the air film (3). Several through grooves (6) are provided on the fixing steel ring (2) to cooperate with the fixing plates (6). The fixing plates (6) pass through the through grooves. Several sets of bolts (8) are provided on the inner arc surface of the fixing steel ring (2) through a threaded structure to the corresponding through grooves. The ends of the bolts (8) are rotatably provided with pressure plates (7) that cooperate with the through grooves. The pressure plates (7) are slidably disposed in the through grooves.

5. The movable air-supported membrane canopy system for open cut foundation pit of subway station according to claim 4, characterized in that, On the inner sides of the crown beams (22) on both sides, there are embedded steel plates (19) and square steel brackets (20) on the embedded steel plates (19). On the upper sides of the crown beams (22) on both sides, there are embedded steel plates (18). The track (1) is provided in four sets and is respectively provided on the embedded steel plates (18) and the square steel brackets (20). A pair of inner tracks (1) are called inner tracks (15), and a pair of tracks (1) located on both sides of the inner tracks (15) are called outer tracks (14). Both the inner tracks (15) and the outer tracks (14) are provided with matching movable support frames. The movable support frame on the inner track (15) is the inner support frame, and the movable support frame on the outer track (14) is the outer support frame. The outer support frame is sleeved around the inner support frame. Both the inner support frame and the outer support frame are provided with air films (3). The air film (3) on the inner support frame is a small air film (17), and the air film (3) on the outer support frame is a large air film (16). The large air film (16) is slidably sleeved around the small air film (17).

6. The movable air-supported membrane canopy system for open cut foundation pit of subway station according to claim 5, characterized in that, The inner support frame and the small air membrane (17) constitute the inner canopy mechanism; the outer support frame and the large air membrane (16) constitute the outer canopy mechanism; Both ends of the inner canopy mechanism are provided with a set of outer canopy mechanisms.

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