CN215292528U - Grid steel frame connecting assembly and rail transit construction structure - Google Patents

Abstract

The utility model provides a grid steelframe coupling assembling and track traffic construction structures relates to the undercut construction technology field, the utility model provides a grid steelframe coupling assembling and track traffic construction structures include panel and anchor assembly, and anchor assembly is used for anchor to little pilot tunnel in the roof beam top backfill concrete, panel install on anchor assembly, and panel be used for with little pilot tunnel primary tributary steelframe owner muscle welded connection. The grid steel frame connecting assembly provided by the utility model can set different longitudinal steel frame intervals according to the actual stratum condition of each small pilot tunnel, and can ensure that the primary support steel frame for subsequent arch buckling construction is effectively connected with the primary support steel frame for the early small pilot tunnel by digesting the condition that the left and right small pilot tunnel steel frame intervals are inconsistent through the plates connected between the main reinforcements of the primary support steel frame for the small pilot tunnel; on the other hand, the small guide hole steel frame of the station does not need to reserve a later-stage buckling arch steel frame connecting node in advance, and mismatching of the primary support steel frame and the follow-up buckling arch steel frame in the construction process of the adjacent small guide holes is avoided.

Description

Grid steel frame connecting assembly and rail transit construction structure

Technical Field

The utility model belongs to the technical field of the undercut construction technique and specifically relates to a grid steelframe coupling assembling and track traffic construction structures are related to.

Background

In urban rail transit construction, when a central urban area does not have open excavation implementation conditions of subway stations, a hole Pile method or a PBA (Pin Beam Arch, "hole, Pile and wall" underground excavation reverse construction method) construction method is usually adopted, underground excavation small guide holes are arranged in advance, side piles, center columns and longitudinal beams are constructed through the small guide holes, then construction excavation is carried out to clamp soil between the support small guide holes for Arch buckling construction, Arch buckling primary support steel frames need to be erected on primary support steel frames of the small guide holes, and Arch buckling primary support steel frame connection nodes need to be reserved in the later period for implementing the small guide holes in the early period.

Because the small pilot tunnel primary support steel frame implemented in the early stage and the buckling arch primary support steel frame implemented in the later stage are determined to be not synchronized in the construction process, the small pilot tunnel primary support steel frames implemented in the early stage and adjacent two sides are independent, the small pilot tunnel primary support steel frames implemented in the early stage are difficult to accurately control on the same mileage cross section, and after soil body excavation in the buckling arch construction stage between the pilot tunnels in the later stage is caused, the buckling arch steel frames can be connected to the small pilot tunnel primary support steel frames implemented in the early stage at two sides in a twisting manner, so that the construction difficulty is high and the connection effect is poor; secondly, the geological conditions of the stations are different, the longitudinal steel frame spacing of the small pilot tunnels can be inconsistent according to different geological conditions, but in order to avoid that the buckling arch steel frame is difficult to construct due to the inconsistent spacing of the first small pilot tunnel steel frames implemented in the early period at two sides, the conventional method is that the longitudinal spacing of all the small pilot tunnel steel frames of the stations is uniformly set to be a small value according to the minimum small pilot tunnel with the worst geological conditions; finally, the small pilot tunnel primary support steel frame is implemented in the early stage and the buckling arch primary support steel frame is implemented in the later stage in an asynchronous construction mode, the later-stage buckling arch primary support steel frame connecting node needs to be reserved for the early-stage implementation of the small pilot tunnel primary support steel frame in the conventional method, however, due to the fact that the underground excavation often has the situations of over excavation, under excavation construction errors and deformation asynchronization among different small pilot tunnels, the large relative displacement of the later-stage buckling arch primary support steel frame connecting node reserved for the small pilot tunnels on two adjacent sides is caused, and therefore the follow-up buckling arch construction primary support steel frame and the early-stage small pilot tunnel primary support steel frame are difficult to be effectively connected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a grid steelframe coupling assembling and track traffic construction structures can guarantee that follow-up knot encircles construction primary frame and early little pilot tunnel primary frame and carry out effective connection.

In order to achieve the above object, the utility model provides a following technical scheme:

in a first aspect, the utility model provides a grid steelframe coupling assembling, including panel and anchor assembly, anchor assembly is used for anchor to little pilot hole inner beam top backfill concrete in, panel install in anchor assembly is last, just panel is used for with little pilot hole primary branch steelframe owner muscle welded connection.

Further, the plate is a steel plate.

Further, the anchoring part comprises a U-shaped steel bar, the U-shaped steel bar comprises a connecting bar and two anchoring bars, the connecting bar is welded to the plate, the two anchoring bars are respectively connected with two ends of the connecting bar, and the two anchoring bars are used for anchoring into the backfill concrete at the top of the inner beam of the small guide hole.

Furthermore, the two anchoring ribs are arranged in parallel relatively, an included angle between one of the anchoring ribs and the connecting rib is an acute angle, or one of the anchoring ribs is perpendicular to the connecting rib.

Further, the plane of the U-shaped steel bar is perpendicular to the plate.

And the connecting piece is used for being connected with the main ribs of the buckling arch primary support steel frame.

Further, the connecting piece and the anchoring piece are respectively positioned on two sides of the plate.

Furthermore, the connecting piece includes head rod and two second connecting rods, the head rod with panel welding, two the second connecting rod respectively with the both ends of head rod are connected, two the second connecting rod is used for with detain and encircle primary steel frame owner muscle welding.

Furthermore, the two second connecting rods are arranged in parallel relatively, and the two second connecting rods are perpendicular to the first connecting rods.

The second aspect, the utility model provides a track traffic construction structures, including above-mentioned scheme grid steelframe coupling assembling.

The utility model provides a grid steelframe coupling assembling and track traffic construction structures can produce following beneficial effect:

the grid steel frame connecting assembly effectively fixes the plate and the small guide hole structure implemented in advance in a proper mode to form a stable connecting node. Specifically, the anchoring part is anchored into the backfilled concrete at the top of the inner beam of the small pilot tunnel to form one effective fixing mode of the plate, and the plate is connected with the main ribs of the primary support steel frame, which are partially exposed out of the existing small pilot tunnel, and is the second effective fixing mode of the plate. During construction, according to actual buckling arch excavation construction conditions, the position of the connecting structure relative to main ribs of the small pilot tunnel primary support steel frame can be flexibly adjusted, and the buckling arch primary support steel frame can be effectively connected with the small pilot tunnel primary support steel frame implemented in advance according to the preset position through the connecting structure.

Compared with the prior art, use the utility model discloses grid steelframe coupling assembling that the first aspect provided can set up different vertical steelframe interval according to the actual stratum condition of every little pilot tunnel on the one hand, follow-up knot encircles construction steelframe and need not to match completely with the vertical steelframe interval of little pilot tunnel, through the inconsistent condition of little pilot tunnel steelframe interval about the panel digestion of connecting between little pilot tunnel primary joist frame main reinforcement, guarantee that follow-up knot encircles construction primary joist frame and early little pilot tunnel primary joist frame and carry out effective connection, and need not station little pilot tunnel steelframe interval and get the minimum in unison according to the most unfavorable geological conditions, thereby can save the engineering investment; on the other hand, the small-pilot-hole steel frame in the station does not need to reserve later-stage buckling arch steel frame connecting nodes in advance, and the problem that the reserved nodes and the follow-up buckling arch steel frame are not matched in connection due to construction errors and tunnel difference deformation of the primary support steel frame in the construction process of the adjacent small pilot holes is solved.

The utility model discloses the rail transit construction structures that the second aspect provided have the utility model discloses the grid steelframe coupling assembling that the first aspect provided, thereby have the utility model discloses all beneficial effects that the grid steelframe coupling assembling that the first aspect provided had.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a grid steel frame connection assembly provided by the present invention in use;

fig. 2 is a schematic structural view of a grid steel frame connection assembly provided by the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

fig. 4 is a sectional view B-B of fig. 3.

Icon: 1-a plate material; 2-an anchor member; 21-connecting ribs; 22-anchoring ribs; 3-a connector; 31-a first connecting rod; 32-a second connecting rod; 4-primary support steel frame main reinforcement of the small pilot tunnel; 5-buckling the main ribs of the arch primary support steel frame.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

Fig. 1 is a schematic structural view of a grid steel frame connection assembly provided by the present invention in use; fig. 2 is a schematic structural view of a grid steel frame connection assembly provided by the present invention; FIG. 3 is a cross-sectional view A-A of FIG. 1; fig. 4 is a sectional view B-B of fig. 3.

The embodiment of the first aspect of the utility model provides a grid steelframe coupling assembling, as shown in fig. 1 to fig. 4, including panel 1 and anchor assembly 2, anchor assembly 2 is used for anchor to little pilot hole inner beam top backfill concrete in, and panel 1 is installed on anchor assembly 2, and panel 1 is used for 4 welded connection with little pilot hole primary tributary steelframe owner muscle.

During actual construction, selecting a proper grid steel frame interval for design construction according to corresponding geological conditions in the early stage of small pilot holes, excavating soil bodies among the small pilot holes to carry out buckling arch construction after the sequential construction of conducting and backfilling the small pilot holes, side piles, center pillars, top longitudinal beams and longitudinal beam top plates is finished, circularly advancing the buckling arch construction according to design requirements at the moment, manually planing off concrete protective layers of the small pilot hole steel frames constructed in the early stage at connecting node positions to expose main ribs at the connecting node positions of primary support steel frames before the buckling arch steel frames are erected in each cycle, processing, welding and splicing the anchoring pieces 2 and the plates 1 at the same time on the ground, drilling construction after the holes are positioned towards the small pilot holes, inserting the processed anchoring pieces 2 into the holes and anchoring the plates, clamping the plates 1 to the exposed main ribs of the grid steel frames while inserting, and finally welding the exposed main ribs 4 of the small pilot hole steel frames and the plates 1, so far, the connection node of the main rib 5 of the buckling arch primary support steel frame and the main rib 4 of the primary support steel frame for completing the small pilot tunnel in advance is formed. The subsequent buckling arch primary support steel frame main ribs 5 are connected with the plates 1 which are longitudinally distributed on the fixed part, namely the buckling arch primary support steel frame main ribs 5 and the early small pilot tunnel primary support steel frame main ribs 4 form an effective connecting node. Because anchor assembly 2 and panel 1 are implemented for the later stage, can carry out the big appearance of dynamic adjustment node like this according to actual construction conditions, take place to warp or under the great condition of construction error in the little pilot tunnel of earlier stage construction, still can guarantee to detain that arch primary tributary steelframe can be connected with little pilot tunnel steelframe according to design size freely.

It should be noted that the anchoring member 2 may be anchored in the small pilot tunnel by using an anchor rod construction process, or a bar-planting construction process may be considered, and the anchoring member 2 is anchored by using a bar-planting glue. In addition, the anchoring piece 2 and the plate 1 can be welded on the ground, or can be welded in a hole after the angle is temporarily adjusted or the welding position is selected in the hole.

Specifically, be convenient for panel 1 and anchor assembly 2 and little pilot hole primary joist steelframe owner muscle 4 be connected, panel 1 is the steel sheet, and steel sheet and little pilot hole primary joist steelframe owner muscle 4 full weld welding, and the steel sheet has better intensity, can guarantee connection structure's stability.

Of course, other alloy materials with better strength can be adopted for the plate 1.

In some embodiments, as shown in fig. 2, the anchoring member 2 includes a U-shaped steel bar, the U-shaped steel bar includes a connecting bar 21 and two anchoring bars 22, the connecting bar 21 is welded to the slab 1, the two anchoring bars 22 are respectively connected to two ends of the connecting bar 21, and the two anchoring bars 22 are used for anchoring into the backfill concrete at the top of the inner beam of the small guide hole.

Specifically, in preparation, the connecting rib 21 and the plate 1 are welded and assembled, and then the two anchoring ribs 22 are anchored in the drilled holes on the small pilot holes. The anchoring ribs 22 constitute one of the effective fixing modes of the plate 1, and the welding of the plate 1 and the main ribs 4 of the small pilot hole primary steel frame constitute the other effective fixing mode of the plate 1, so that a stable connecting node is formed.

In some embodiments, as shown in fig. 2, the two anchoring ribs 22 are arranged in parallel, wherein the included angle between one of the anchoring ribs 22 and the connecting rib 21 is acute, and the included angle between the other anchoring rib 22 and the connecting rib 21 is obtuse.

It should be noted that the included angle between the anchoring rib 22 and the connecting rib 21 can be adjusted according to actual situations.

In some other embodiments, the two anchoring ribs 22 are perpendicular to the connecting rib 21.

In at least one embodiment, the plane in which the U-shaped reinforcing bars lie is perpendicular to the sheet 1.

The plate 1 can be directly connected with the main rib 5 of the buckling arch primary support steel frame or indirectly connected with the main rib 5 of the buckling arch primary support steel frame.

In some embodiments, as shown in fig. 4, in order to facilitate the connection between the plate 1 and the main rib 5 of the buckle arch primary steel frame, the grid steel frame connection assembly further includes a connection member 3 connected to the plate 1, and the connection member 3 is used to connect to the main rib 5 of the buckle arch primary steel frame.

In some embodiments, as shown in fig. 4, the connecting members 3 and the anchoring members 2 are respectively located on two sides of the plate 1, that is, the connection between the main rib 4 of the small-pilot-hole primary-support steel frame and the main rib 5 of the buckling-arch primary-support steel frame is realized through the plate 1 and the connecting members 3.

It should be noted that all the structures capable of connecting the plate 1 and the main rib 5 of the buckle arch primary steel frame may be the connecting member 3 mentioned in the above embodiments. For example, the connecting member 3 may be a connecting plate, a connecting rod, or the like.

In some embodiments, as shown in fig. 4, the connection member 3 includes a first connection rod 31 and two second connection rods 32, the first connection rod 31 is welded to the plate 1, the two second connection rods 32 are respectively connected to two ends of the first connection rod 31, and the two second connection rods 32 are used for welding to the main bars 5 of the buckle arch primary steel frame.

The connecting piece 3, the plate 1 and the buckling arch primary steel frame main rib 5 are connected in a welded mode, so that the connection firmness can be effectively guaranteed, and a stable connecting structure is formed.

In at least one embodiment, the first connecting rod 31 and the two second connecting rods 32 are of an integral structure, and in particular, the connecting member 3 may be formed by bending a section of steel bar.

In some embodiments, as shown in fig. 4, the two second connecting bars 32 are disposed in parallel, and the two second connecting bars 32 are perpendicular to the first connecting bars 31.

The utility model discloses the embodiment of the second aspect lies in providing a track traffic construction structure, the utility model discloses the track traffic construction structure that the embodiment of the second aspect provided includes above-mentioned grid steelframe coupling assembling.

The utility model discloses the rail transit construction structures that the embodiment of second aspect provided have the utility model discloses the grid steelframe coupling assembling that the embodiment of first aspect provided, thereby have the utility model discloses all beneficial effects that the grid steelframe coupling assembling that the embodiment of first aspect provided had.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. The utility model provides a grid steelframe coupling assembling, its characterized in that includes panel (1) and anchor assembly (2), anchor assembly (2) are used for anchor to little pilot hole roof beam top backfill concrete in, panel (1) install in anchor assembly (2) are last, just panel (1) are used for with little pilot hole primary support steelframe owner muscle (4) welded connection.

2. Grid steel frame connection assembly according to claim 1, characterized in that the plates (1) are steel plates.

3. The grid steel frame connecting assembly according to claim 1, wherein the anchoring member (2) comprises a U-shaped steel bar, the U-shaped steel bar comprises a connecting bar (21) and two anchoring bars (22), the connecting bar (21) is welded with the plate (1), the two anchoring bars (22) are respectively connected with two ends of the connecting bar (21), and the two anchoring bars (22) are used for anchoring into the backfill concrete of the beam top in the small guide hole.

4. The grid steel frame connecting assembly according to claim 3, wherein the two anchoring ribs (22) are arranged in parallel, an included angle between one of the anchoring ribs (22) and the connecting rib (21) is an acute angle, or one of the anchoring ribs (22) is perpendicular to the connecting rib (21).

5. A grid steel frame connection assembly according to claim 4, wherein the plane of the U-shaped steel bars is perpendicular to the plate (1).

6. The grid steel frame connecting assembly according to claim 1, further comprising a connecting piece (3) connected with the plate (1), wherein the connecting piece (3) is used for being connected with a buckling arch primary support steel frame main rib (5).

7. The grid steel frame connection assembly according to claim 6, wherein the connecting piece (3) and the anchoring piece (2) are respectively located on two sides of the plate (1).

8. The grid steel frame connecting assembly according to claim 7, wherein the connecting member (3) comprises a first connecting rod (31) and two second connecting rods (32), the first connecting rod (31) is welded to the plate (1), the two second connecting rods (32) are respectively connected to two ends of the first connecting rod (31), and the two second connecting rods (32) are used for welding with the buckling arch primary steel frame main rib (5).

9. The grid steel frame connection assembly of claim 8, wherein the two second connection rods (32) are arranged in parallel and the two second connection rods (32) are perpendicular to the first connection rods (31).

10. A rail transit construction structure comprising a grid steel frame connection assembly according to any one of claims 1 to 9.

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