CN210710435U

CN210710435U - Low clearance underground wall lower cage construction structures

Info

Publication number: CN210710435U
Application number: CN201921643727.6U
Authority: CN
Inventors: 任海丹; 陈梅琴; 陈钢; 何宜龙; 陆兴江; 曹国鹏; 马永库
Original assignee: Hangzhou Huafeng Foundation Engineering Co Ltd
Current assignee: Hangzhou Huafeng Foundation Engineering Co Ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-06-09
Anticipated expiration: 2029-09-29

Abstract

The utility model relates to a cage construction structures under low headroom underground wall solves subway and overpass intersection construction headroom limited, the big problem of the construction degree of difficulty. This construction structures sets up the portal frame above the wall slot, the portal frame includes two A type stands, is equipped with the crossbeam between the top of two A type stands, the crossbeam below is equipped with the hoist and mount calabash of two liftable, and the hoist and mount calabash is gone up to hang and is equipped with upper segment steel reinforcement cage, the wall slot top is erect and is equipped with the hypomere steel reinforcement cage, the notch at the wall slot is spanned through the channel-section steel in the upper portion of hypomere steel reinforcement cage, the outside of A type stand still is equipped with the lift control device of hoist and mount calabash. The utility model discloses design the gallows and carry out segmentation hoist and mount concatenation to the steel reinforcement cage of underground wall under the limited condition of overpass below space height, accomplish the cage construction under the low headroom underground wall, ensure construction safety under limited space condition, guarantee construction quality, avoid causing the influence to the overpass.

Description

Low clearance underground wall lower cage construction structures

Technical Field

The utility model belongs to the building engineering field relates to an underground works construction structure, in particular to cage construction structure under low headroom underground wall.

Background

Along with the development of economy in China, the population density of cities is continuously improved, the quantity of all vehicles owned by people is continuously improved, the urban ground traffic pressure is higher and higher, and especially in the early and late peak periods, the situation of bottom traffic jam is more and more serious. In view of the above situation, constructors build elevated and overpasses above the ground and track traffic such as subways and the like below the ground to form a three-dimensional traffic network, thereby alleviating the situation of travel congestion.

In the subway planning construction process, the crossing with the existing viaduct is inevitable. The underground diaphragm wall structure construction of the subway needs grooving, placing a reinforcement cage and then pouring concrete. According to the design depth of a subway, the depth of an underground continuous wall can even reach tens of meters, in an open area, a reinforcement cage of the underground continuous wall with the depth of 20 meters and 30 meters can be hoisted by a crane for one-time cage lowering, however, at the intersection of the subway and a viaduct, because the height below the viaduct is limited, the cage can not be lowered for one time, the cage needs to be spliced in sections, and the current hoisting cage lowering construction mode can not meet the low-clearance cage lowering construction requirement below the viaduct.

Disclosure of Invention

The utility model aims to solve the problem that construction is accomplished to the cage mode under subway and the overpass intersection construction headroom is limited, and the steel reinforcement cage of continuous wall body in underground can't adopt current crane direct hoist and mount, provides a cage construction structures under low headroom underground wall, adopts the lower cage construction of the mode completion steel reinforcement cage of the portal frame segmentation hoist and mount concatenation that is less than the overpass height.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a cage construction structures under low headroom underground wall, includes the wall groove of accomplishing the excavation, its characterized in that: wall groove top sets up the portal frame, the portal frame includes two A type stands, is equipped with the crossbeam between the top of two A type stands, the crossbeam below is equipped with the hoist and mount calabash of two liftable, and the hoist and mount calabash is gone up to hang and is equipped with upper segment steel reinforcement cage, the hypomere steel reinforcement cage has been erect at the wall groove top, but the channel-section steel is transversely worn to be equipped with more than two on hypomere steel reinforcement cage's the upper portion, and the channel-section steel is transversely striden and is established the notch in the wall groove, the bottom of A type stand is equipped with a plurality of walking wheels, walking wheel symmetry is striden and is established in wall groove both sides and can follow the walking of wall groove direction. And setting the height of the portal frame according to the height below the overpass, wherein the height of the portal frame does not exceed the height below the overpass, and reserving a buffer space with the height of at least 50 cm. After this device hypomere steel reinforcement cage lower cage, transversely penetrate a plurality of channel-section steels and erect the notch at the wall groove to guarantee the sufficient elevation in the upper end of hypomere steel reinforcement cage, so that with the butt joint of upper segment steel reinforcement cage. The side that portal frame was carried to upper segment steel reinforcement cage use the truck-mounted crane, two hoist and mount hoists below the crossbeam adopt the duplex to lift to hoist the upper segment steel reinforcement cage and return straight, when necessary, the portal frame can be followed wall slot extending direction and removed spacious department and hoist the upper segment steel reinforcement cage, align upper segment steel reinforcement cage and hypomere steel reinforcement cage and weld and assemble the back, take the channel-section steel out, the hoist and mount calabash is transferred, to setting for the elevation on the upper segment steel reinforcement cage, adopt the channel-section steel to alternate and erect the back, portal frame hoist and mount next upper segment steel reinforcement cage and continue the concatenation.

Preferably, the outer sides of the lower parts of the two A-shaped stand columns are respectively provided with a control platform, the control platforms are provided with winches for winding and unwinding the steel cable, the winches on the two control platforms are respectively connected with the two hoisting hoists through the steel cable, and the cross beam is provided with a pulley for steering the steel cable.

Preferably, for a set of corresponding winch and hoisting block, the end part of the beam and the upper part of the hoisting block are respectively provided with a pulley.

Preferably, a connecting plate is arranged at the joint of the upper section steel reinforcement cage and the lower section steel reinforcement cage, vertical steel bars of the upper section steel reinforcement cage and the lower section steel reinforcement cage are welded with the connecting plate, and the length of a welding seam is not less than 250 mm.

Preferably, the two hoisting hoists are arranged along the extension direction of the cross beam and symmetrically arranged on two sides of the midpoint of the cross beam.

Preferably, the steel reinforcement cage conveying device further comprises a truck-mounted crane used for conveying the steel reinforcement cage to the portal frame, and the direction of the steel reinforcement cage conveyed by the truck-mounted crane is perpendicular to the traveling direction of the portal frame.

The utility model discloses design the gallows and carry out segmentation hoist and mount concatenation to the steel reinforcement cage of underground wall under the limited condition of overpass below space height, accomplish the cage construction under the low headroom underground wall, ensure construction safety under limited space condition, guarantee construction quality, avoid causing the influence to the overpass.

Drawings

Fig. 1 is the utility model discloses a first section hoisting structure schematic diagram.

Fig. 2 is a schematic diagram of a splicing state structure of the present invention.

Fig. 3 is a schematic side view of the present invention.

Fig. 4 is the state schematic diagram of the steel reinforcement cage is sent into by the truck-mounted crane of the utility model.

In the figure: 1. the device comprises a portal frame, 2 and A-type columns, 3, a cross beam, 4, a walking base, 5, a control platform, 6, a winch, 7, a steel cable, 8, a pulley, 9, a hoisting hoist, 10, a reinforcement cage, 10a, an upper section reinforcement cage, 10b, a lower end reinforcement cage, 11, an overhead frame, 12, a wall groove, 13, channel steel, 14, a connecting plate, 15 and a truck-mounted crane.

Detailed Description

The present invention will be further described with reference to the following specific embodiments and accompanying drawings.

Example (b): a low clearance underground wall lower cage construction structure is shown in figures 1-4. The construction background of the structure is as follows: nine-standard section of Hangzhou Haicheng inter-city railway engineering, located in Haining City of Zhejiang province. According to the engineering requirement, part of underground walls need to be constructed below the elevated frames 11. The clearance height between the viaduct and the ground is about 10m, the construction depth of the underground wall is more than 30m, a total of 5 viaduct piers are positioned above the station structure, and the steel pipe columns (constructed) at the lower part of the pier bearing platform are used as permanent columns of the station main structure.

The structure of this implementation sets up portal frame 1 including accomplishing the wall groove 12 of excavation, wall groove top, the portal frame includes two A type stands 2, is equipped with crossbeam 3 between the top of two A type stands, the crossbeam below is equipped with the hoist and mount calabash 9 of two liftable, and two hoist and mount calabash 9 set up along 3 extending direction of crossbeam to in crossbeam mid point bilateral symmetry setting. The bottom of the A-shaped upright post 2 is provided with a walking base 4, the bottom of the walking base 4 is provided with a plurality of walking wheels, and the walking wheels are symmetrically arranged on two sides of the wall groove 12 in a striding mode and can walk along the direction of the wall groove. And the outer side of the A-shaped upright post is also provided with a lifting control device for lifting the hoist 9. The outer sides of the lower parts of the two A-shaped stand columns 2 are respectively provided with a control platform 6, the control platforms are provided with windlasses 7 for winding and unwinding steel cables, and the windlasses on the two control platforms are respectively connected with a hoisting hoist 9 on one corresponding side through a steel cable 8. For a group of corresponding windlasses 7 and hoisting hoists 9, pulleys 8 are respectively arranged on the end part of the beam and above the hoisting hoists.

The hoisting of the first section of the steel reinforcement cage 10 is as shown in fig. 1, the two hoisting hoists hoist the steel reinforcement cage 10 to the wall slot 12 and transfer the steel reinforcement cage until the upper end of the steel reinforcement cage reaches a set elevation, and the steel channel 13 is used for penetrating and erecting. Two sections of reinforcement cages are spliced as shown in figures 2-3, two hoisting hoists 9 jointly hoist an upper section of reinforcement cage 10a, a lower section of reinforcement cage 10b is erected at the top of the wall slot, more than two extractable channel steels 13 transversely penetrate through the upper part of the lower section of reinforcement cage, and the channel steels cross the notch erected in the wall slot 12. The butt joint of the upper section steel reinforcement cage and the lower section steel reinforcement cage is provided with a connecting plate 14, and the height of the connecting plate is 1500 mm. The vertical steel bars of the upper section steel bar cage and the lower section steel bar cage are welded with the connecting plate, and the length of the welding line is not less than 300 mm.

As shown in fig. 4, the scheme further comprises a truck-mounted crane 15 for conveying the reinforcement cage to the portal frame 1, wherein the direction of conveying the reinforcement cage of the truck-mounted crane is perpendicular to the traveling direction of the portal frame. The reinforcement cage 10 is delivered to the side of the portal frame by the truck-mounted crane, and the two hoisting hoists adopt a double-crane hoisting crane to straighten the reinforcement cage.

Claims

1. The utility model provides a cage construction structures under low headroom underground wall, includes the wall groove of accomplishing the excavation, its characterized in that: wall groove top sets up the portal frame, the portal frame includes two A type stands, is equipped with the crossbeam between the top of two A type stands, the crossbeam below is equipped with the hoist and mount calabash of two liftable, and the hoist and mount calabash is gone up to hang and is equipped with upper segment steel reinforcement cage, the hypomere steel reinforcement cage has been erect at the wall groove top, but the channel-section steel is transversely worn to be equipped with more than two on hypomere steel reinforcement cage's the upper portion, and the channel-section steel is transversely striden and is established the notch in the wall groove, the bottom of A type stand is equipped with a plurality of walking wheels, walking wheel symmetry is striden and is established in wall groove both sides and can follow the walking of wall groove direction.

2. The structure of claim 1 for constructing a low clearance underground wall lower cage, wherein: the outer sides of the lower parts of the two A-shaped stand columns are respectively provided with a control platform, the control platforms are provided with winches for winding and unwinding steel cables, the winches on the two control platforms are respectively connected with two hoisting hoists through the steel cables, and the cross beam is provided with a pulley for steering the steel cables.

3. A low headroom underground wall lower cage construction structure as claimed in claim 2, wherein: for a group of corresponding windlasses and hoisting hoists, pulleys are respectively arranged at the end part of the beam and above the hoisting hoists.

4. A low headroom underground wall lower cage construction structure as claimed in claim 1, 2 or 3, wherein: the butt joint of the upper section steel reinforcement cage and the lower section steel reinforcement cage is provided with a connecting plate, the vertical steel bars of the upper section steel reinforcement cage and the lower section steel reinforcement cage are welded with the connecting plate, and the length of a welding line is not less than 250 mm.

5. A low headroom underground wall lower cage construction structure as claimed in claim 1, 2 or 3, wherein: the two hoisting hoists are arranged along the extension direction of the beam and symmetrically arranged on two sides of the midpoint of the beam.

6. A low headroom underground wall lower cage construction structure as claimed in claim 1, 2 or 3, wherein: the steel reinforcement cage conveying device is characterized by further comprising a truck-mounted crane used for conveying a steel reinforcement cage to the portal frame, and the direction of the conveying steel reinforcement cage of the truck-mounted crane is perpendicular to the traveling direction of the portal frame.