CN213834262U - Portal frame structure for subway tunnel shaft construction - Google Patents

Abstract

The utility model discloses a portal frame structure is used in subway tunnel shaft construction, including multiunit door type frame and set up in the portal frame ceiling of multiunit door type frame top, this multiunit door type frame is coaxial and equidistant distribution, and each group door type frame all includes the first stand and the second stand that set up side by side, the bottom of first stand and second stand sets up respectively on the stand foundation bed, the upper end of first stand and second stand is passed through the floor and is connected with first crossbeam, is provided with second crossbeam and electric arc furnace maintenance platform between first stand and the second stand, the lower terminal surface central point of first crossbeam puts and is provided with walking beam and electric arc furnace, the electric arc furnace is provided with two and is located the both sides of walking beam respectively, be provided with many tie-beams between the up end of first crossbeam and the portal frame ceiling.

Description

Portal frame structure for subway tunnel shaft construction

Technical Field

The utility model belongs to the technical field of subway construction is relevant, concretely relates to portal frame structure is used in subway tunnel shaft construction.

Background

With the rapid development of the modernization of the urban traffic in China, the subway construction in China also steps into the rapid development period, the shaft construction activities are more and more common, but the shaft construction lifting is a difficult problem which troubles the shaft construction of the subway. Related equipment of subway construction among the prior art has following drawback: the construction of the urban subway shaft in China is generally promoted by the traditional gantry crane, so that the promotion efficiency is low, the maintenance cost is high, the depreciation cost is high, and the safe and efficient implementation of the construction of the subway shaft is severely restricted.

Disclosure of Invention

The utility model discloses to the technical problem that above-mentioned exists, a portal frame structure is used in subway tunnel shaft construction that does benefit to the construction, improves the efficiency of construction, reduces the construction risk is proposed.

The utility model adopts the technical proposal that:

a portal frame structure for the construction of a subway tunnel shaft,

the portal frame is built along the contour of the locking collar beam foundation pit, the portal frame comprises a plurality of groups of door-shaped frames which are coaxial and arranged at equal intervals and a portal frame ceiling arranged above the portal frame, soil bin steel frames are vertically arranged in the door-shaped frames, each group of door-shaped frames comprises a first upright and a second upright which are arranged in parallel, the bottoms of the first upright and the second upright are respectively arranged on upright foundation bases, the upper ends of the first upright and the second upright are connected with a first beam through rib plates, a second beam is arranged between the first upright and the second upright, electric arc furnace maintenance platforms are arranged on the first upright and the second upright and are positioned on the door-shaped frames far away from the locking collar beam foundation pit, two first door frame corner supports which are symmetrical to each other are arranged between the first beam and the second beam, two second door frame corner supports which are symmetrical to each other are arranged between the first upright and the second upright and the first beam, the electric arc furnace is characterized in that a vertically extending walking beam is arranged at the center of the lower end face of the first cross beam, electric arc furnaces are respectively arranged on two sides of the walking beam, and a plurality of connecting beams are arranged between the upper end face of the first cross beam and a ceiling of the portal frame.

Preferably, all be provided with third crossbeam, fourth crossbeam and bridging between two adjacent first stands and between two adjacent second stands, the bridging sets up between third crossbeam and fourth crossbeam, the bridging includes head rod and second connecting rod, connect through coupling assembling between head rod and the second connecting rod.

Preferably, the connecting assembly comprises a first rotating disk and a second rotating disk, the first rotating disk is provided with a circular shaft and is positioned at the central position of the first rotating disk, the circular shaft is provided with an inner hole, two opposite sides of the first rotating disc are provided with first arc-shaped connecting plates, the outer side surfaces of the two first arc-shaped connecting plates which are symmetrical to each other are provided with first fixed shafts, the free end of the first arc-shaped connecting plate is provided with a first circuitous part extending towards the direction of the circular shaft, the second rotating disk is positioned between the first circuitous part and the first rotating disk, a central through hole matched with the circular shaft is arranged on the second rotating disk, second arc-shaped connecting plates are arranged on two opposite sides of the second rotating disk, second fixed shafts are arranged on the outer side surfaces of the two mutually symmetrical second arc-shaped connecting plates, and a second circuitous part facing to the central perforation direction is arranged at the free end of the second arc-shaped connecting plate.

Preferably, a fixing nut is arranged in the inner hole, and a gasket is arranged between the fixing nut and the second rotating disc.

Preferably, the first connecting rod comprises two first connecting rod units, and the end parts of the two first connecting rod units are respectively sleeved on two first fixed shafts on the first rotating disc; the second connecting rod comprises two second connecting rod units, and the end parts of the two second connecting rod units are respectively sleeved on two second fixed shafts on the second rotating disc.

Preferably, the included angle between the adjacent first arc-shaped connecting plate and the second arc-shaped connecting plate is 60-120 degrees.

Preferably, stand foundation bed up end is provided with pre-buried steel sheet, set up the fixed orifices on the pre-buried steel sheet, the fixed orifices extends to in the stand foundation bed, first stand and second stand bottom all insert in the fixed orifices, all fix through the floor that two sets of symmetries set up between pre-buried steel sheet and first stand and the second stand.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a portal frame structure is including setting up in first stand and the second stand of shaft excavation both sides, and first stand and second stand bottom all are fixed in stand basis and sit, thereby the stability of stand has been improved, secondly, be provided with the second crossbeam between first stand and the second stand, be provided with a set of first door frame gusset of mutual symmetry between second crossbeam and first crossbeam, be provided with a set of second door frame gusset of mutual symmetry between first stand and second stand and first crossbeam, fix first crossbeam and first stand and second stand through first door frame gusset and second door frame gusset, the holistic stability of door type frame has been improved, and set up two sets of electric arc furnaces at the lower terminal surface of crossbeam, promote at the shaft excavation in-process through two sets of electric arc furnaces, to a great extent improved the security of subway shaft construction, High efficiency.

2. The utility model discloses a be provided with electric arc between first stand and the second stand among the portal frame structure and overhaul the platform and be located the walking beam below, make things convenient for the staff to overhaul the electric arc furnace, improved the security of operation simultaneously.

3. The utility model discloses a portal frame structure in adjacent two first stands and adjacent two second stands all be provided with third crossbeam and fourth crossbeam between, be provided with the bridging between third crossbeam and the fourth crossbeam, the bridging is formed by connecting coupling assembling through head rod and second connecting rod, and coupling assembling then includes first rotating disc and second rotating disc, be provided with the round axle on the first rotating disc and be located the central point of first rotating disc, be provided with the hole on the round axle, the relative both sides of first rotating disc are provided with first arc connecting plate, and two first arc connecting plate lateral surfaces that are mutually symmetrical all are provided with first fixed axle, the free end of first arc connecting plate is provided with the first circuitous portion that extends towards the round axle direction, the second rotating disc is located between first circuitous portion and the first rotating disc, the second rotating disc is provided with a central through hole matched with the circular shaft, the two opposite sides of the second rotating disc are provided with second arc-shaped connecting plates, the outer side surfaces of the two second arc-shaped connecting plates which are symmetrical to each other are provided with second fixed shafts, and the free end of each second arc-shaped connecting plate is provided with a second roundabout part facing the direction of the central through hole; through setting up first rotating circular disc and the second rotating circular disc that rotates the connection to set up in first rotating circular disc and fixed disk both sides and be connected first linkage unit and second connecting piece unit, it is more convenient to compare in traditional fastener connection, connects on the axis of the head rod unit of first rotating circular disc and second connecting rod unit all is in same inclined plane, makes the connecting rod unbent, has strengthened the support intensity of bridging.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a front view of a gantry structure for the construction of a subway tunnel shaft of the present invention;

fig. 2 is a left side view of the portal frame structure for the construction of the subway tunnel shaft of the present invention;

FIG. 3 is a top view of a column foundation;

fig. 4 is a schematic structural view of the connecting assembly.

Wherein, 1-column foundation base; 2-a first upright; 3-a second upright; 4-a second beam; 5-a first beam; 6-connecting the beams; 7-a portal frame ceiling; 8-an arc overhaul platform; 9-a second door frame gusset; 10-a first door frame gusset; 11-a walking beam; 12-an electric arc furnace; 13-a rib plate; 14-a third connecting beam; 15-a fourth connecting beam; 16-a cross brace; 1601 — a first connecting rod unit; 1602 — a second connecting rod unit; 17-a connecting assembly; 1701-first rotating disc; 1702-a first arcuate web; 1703-a first circuitous portion; 1704-round axis; 1705-inner hole; 1706-a first connecting shaft; 1707-a second rotating disk; 1708-a second arc-shaped connecting plate; 1709-a second circuitous portion; 1710-a second connecting shaft; 1711-perforating; 1712-a gasket; 1713-fixing the nut; 18-soil bin steel frames; 19-pre-burying a steel plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model particularly provides a portal frame structure for subway tunnel shaft construction, the portal frame is built along the contour of a locking collar beam foundation pit, as shown in figure 1 and figure 2, the portal frame structure comprises a plurality of groups of door-shaped frames and a portal frame ceiling 7 arranged above the plurality of groups of door-shaped frames, the plurality of groups of door-shaped frames are coaxially and equidistantly distributed, each group of door-shaped frames comprises a first upright 2 and a second upright 3 which are arranged side by side, the bottoms of the first upright 2 and the second upright 3 are respectively arranged on an upright foundation base 1, the upper ends of the first upright 2 and the second upright 3 are connected with a first beam 5 through a rib plate 13, a second beam 4 is arranged between the first upright 2 and the second upright 3, an electric arc furnace maintenance platform 8 is arranged on the first upright 2 and the second upright 3, the electric arc furnace maintenance platform 8 is positioned on the door-shaped frame far away from the locking collar beam foundation pit, two first door frame corner supports 10 which are symmetrical to each other are arranged between the first cross beam 5 and the second cross beam 4, two second door frame corner supports 9 which are symmetrical to each other are arranged between the first upright post 2 and the second upright post 3 and the first cross beam 5, a walking beam 11 is arranged at the center position of the lower end face of the first cross beam 4, electric arc furnaces 12 are arranged on two sides of the walking beam 11 respectively, and a plurality of connecting beams 6 are arranged between the upper end face of the first cross beam 5 and the portal frame ceiling 7.

Specifically, the electric arc furnace overhaul platform 8 is positioned on a door-shaped frame far away from a fore shaft collar beam foundation pit and comprises a horizontal supporting beam and a vertical protecting beam, the horizontal supporting beam is respectively connected with a first stand column 2 and a second stand column 3, the vertical protecting beam is arranged between the horizontal supporting beam and a walking beam, two inclined supports are further arranged at the bottom of the horizontal supporting beam, the end parts of the two inclined supports are respectively fixed on the first stand column and the second stand column, a pattern steel plate with the thickness of 3mm is arranged on the horizontal supporting beam, steel pipes with the diameter of 42mm are arranged on two sides of the pattern steel plate, the height of each steel pipe is 1.2m, a connecting steel pipe is arranged on the same radial steel pipe, so that a protective guard with the height of 1.2m is formed, the electric arc furnace overhaul platform 8 and the electric arc furnace 12 are respectively positioned at two ends of the walking beam 11, the upper end of the electric arc furnace overhaul platform 12 is in contact with the walking beam 11, and the electric arc furnace overhaul platform plays a good role in protecting safety of workers, greatly improves the use efficiency and the safety of the portal frame.

As shown in fig. 2 and fig. 3, in the utility model, all be provided with third crossbeam 14, fourth crossbeam 15 and bridging 16 between two adjacent first stands 2 and between two adjacent second stands 3, bridging 16 sets up between third crossbeam 14 and fourth crossbeam 15, bridging 16 includes head rod and second connecting rod, connect through coupling assembling 17 between head rod and the second connecting rod.

The connecting assembly comprises a first rotating disk 1701 and a second rotating disk 1707, a circular shaft 1704 is fixed at the center position of one side of the first rotating disk 1701, a through hole 1711 matched with the circular shaft 1704 is formed in the second rotating disk 1707, and the circular shaft 1704 is inserted into the through hole 1711 to realize the rotating connection between the second rotating disk 1707 and the first rotating disk 1701.

First arc-shaped connection plates 1702 are fixed to opposite sides of the first rotating disk 1701 by welding, respectively, ends of the two first arc-shaped connection plates 1702 are bent to form first roundabout portions 1703, a first connecting shaft 1706 with the axes in the same straight line is fixed at the central position on the two first arc-shaped connecting plates 1702, a second arc-shaped connecting plate 1708 is respectively fixed at the opposite position of the side surface of the same second rotating disk 1707 by welding, the end parts of the two second arc-shaped connecting plates 1708 are oppositely bent to form a second circuitous part 1709, a second connecting shaft 1710 with the axes on the same straight line is fixed at the center of the two second arc-shaped connecting plates 1708, the axes of the first connecting shaft 1706 and the second connecting shaft 1710 are both positioned on the same plane, the length of the connecting shaft is 100mm-300mm, and the ends of the first and second connecting shafts 1706, 1710 remote from the first and second rotating disks 1701, 1707 are provided with chamfers. The chamfer reduces the diameter of one end of each of the first connecting shaft 1706 and the second connecting shaft 1710 inserted into the first connecting rod unit 1601 and the second connecting rod 1602, facilitates the insertion of the first connecting shaft 1706 and the second connecting shaft 1710 into the first connecting rod unit 1601 and the second connecting rod 1602, bends the end of the first arc-shaped connecting plate 1701 to form a first detour 1703, positions the second rotating disk 1707 between the first detour 1703 and the first rotating disk 1701, bends the end of the second arc-shaped connecting plate 1708 to form a second detour 1709, positions the first rotating disk 1701 between the second detour 1709 and the second rotating disk 1707, makes the first rotating disk 1701 and the second rotating disk 1707 difficult to separate from each other, and makes the rotating relationship between the first rotating disk 1701 and the second rotating disk 1707 more stable.

By sleeving the first connecting rod unit 1601 on the first connecting shaft 1706 and sleeving the second connecting rod unit 1602 on the second connecting shaft 1710 in the same way, the first connecting rod unit 1601 sleeved on the first rotating disk 1701 and the second rotating disk 1707 and the second connecting rod unit 1602 cross each other, and then the first rotating disk 1701 and the second rotating disk 1707 are screwed into the inner hole 1705 on the circular shaft 1704 through the fixing nut 1713, so that the first rotating disk 1701 and the second rotating disk 1707 are fixed, two first connecting rod units 1601 are positioned on the same straight line, the same second connecting rod unit 1601 is positioned on the same straight line, and then the end parts of the two first connecting rod units 1601, the third beam 14 and the fourth beam 15 or two adjacent first columns 2 or two adjacent second columns 3 are fixed without bending, so as to achieve the effect of improving the supporting strength of the scissor brace 16. The first connecting rod and the second connecting rod are directly connected with the first connecting shaft 1706 and the second connecting shaft 1710 in a sleeved mode respectively, so that the inconvenience of connection of a traditional rotating fastener is avoided.

When the first and second rotating discs 1701 and 1707 are connected to the first and second connecting rods and disposed between the third and fourth beams 14 and 15, the angle between the first and second connecting rod units 1601 and 1602 located on the first and second rotating discs 1701 and 1707 is 60 ° to 120 °, which meets the construction specification.

As shown in fig. 4, 1 up end of stand foundation bed is provided with pre-buried steel sheet 22, set up the fixed orifices on the pre-buried steel sheet 22, the fixed orifices extends to in the stand foundation bed 1, all insert in the fixed orifices first stand 2 and 3 bottoms of second stand, all fix through the floor 13 that two sets of symmetries set up between pre-buried steel sheet 19 and first stand 2 and the second stand 3, improved the holistic stability of door type frame.

The above, only be the preferred embodiment of the utility model, it is not right the utility model discloses do any restriction, all according to utility model technical entity to any simple modification, change and the equivalent change of doing above embodiment, all still belong to the utility model discloses technical scheme's within the scope of protection.

Claims (7)

1. A portal frame structure for the shaft construction of a subway tunnel is characterized in that the portal frame is built along the contour of a locking collar beam foundation pit, the portal frame comprises a plurality of groups of door-shaped frames which are coaxially and equidistantly arranged and a portal frame ceiling arranged above the portal frame, soil bin steel frames are vertically arranged in the door-shaped frames along the inner part of each group, each group of door-shaped frames comprises a first stand column and a second stand column which are arranged side by side, the bottoms of the first stand column and the second stand column are respectively arranged on a stand column foundation base, the upper ends of the first stand column and the second stand column are connected with a first cross beam through rib plates, a second cross beam is arranged between the first stand column and the second stand column, electric arc furnace maintenance platforms are arranged on the first stand column and the second stand column, the electric arc furnace maintenance platforms are positioned on the door-shaped frames far away from the locking collar beam foundation pit, two first arc furnace corner supports which are mutually symmetrical are arranged between the first cross beam and the second cross beam, two second door frame corner supports which are symmetrical to each other are arranged between the first upright post and the first crossbeam, a vertically extending walking beam is arranged at the center of the lower end face of the first crossbeam, electric arc furnaces are respectively arranged on two sides of the walking beam, and a plurality of connecting beams are arranged between the upper end face of the first crossbeam and a portal frame ceiling.

2. The portal frame structure for the construction of the subway tunnel shaft according to claim 1, wherein a third cross beam, a fourth cross beam and a cross brace are arranged between two adjacent first columns and between two adjacent second columns, the cross brace is arranged between the third cross beam and the fourth cross beam, the cross brace comprises a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are connected through a connecting assembly.

3. The portal frame structure for subway tunnel shaft construction as claimed in claim 2, wherein said connecting assembly comprises a first rotating disc and a second rotating disc, said first rotating disc is provided with a circular shaft and located at the center of said first rotating disc, said circular shaft is provided with an inner hole, two opposite sides of said first rotating disc are provided with first arc connecting plates, two mutually symmetrical first arc connecting plates are provided with first fixing shafts at their outer side surfaces, the free end of said first arc connecting plate is provided with a first circuitous portion extending towards the circular shaft, said second rotating disc is located between said first circuitous portion and said first rotating disc, said second rotating disc is provided with a central through hole matched with the circular shaft, two opposite sides of said second rotating disc are provided with second arc connecting plates, two mutually symmetrical second arc connecting plates are provided with second fixing shafts at their outer side surfaces, and a second circuitous part facing to the central perforation direction is arranged at the free end of the second arc-shaped connecting plate.

4. The portal frame structure for the construction of the subway tunnel shaft of claim 3, wherein a fixing nut is arranged in the inner hole, and a washer is arranged between the fixing nut and the second rotating disc.

5. The portal frame structure for the construction of the shaft of the subway tunnel according to claim 3, wherein said first connecting rods comprise two first connecting rod units, the ends of the two first connecting rod units are respectively sleeved on two first fixed shafts on the first rotating disc; the second connecting rod comprises two second connecting rod units, and the end parts of the two second connecting rod units are respectively sleeved on two second fixed shafts on the second rotating disc.

6. The portal frame structure for subway tunnel shaft construction according to claim 3, wherein an included angle between adjacent first arc-shaped connecting plates and second arc-shaped connecting plates is 60-120 °.

7. The portal frame structure for subway tunnel shaft construction of claim 1, wherein the stand foundation base up end is provided with pre-buried steel sheet, set up the fixed orifices on the pre-buried steel sheet, the fixed orifices extends to in the stand foundation base, first stand and second stand bottom all insert in the fixed orifices, all fix through the floor that two sets of symmetries set up between pre-buried steel sheet and first stand and the second stand.

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