CN210421113U

CN210421113U - Bearing and supporting structure of large deep foundation pit inverted support steel support

Info

Publication number: CN210421113U
Application number: CN201921338837.1U
Authority: CN
Inventors: 郭海东; 李慧民; 田卫; 段品生; 钟兴举; 柴庆
Original assignee: Xian University of Architecture and Technology
Current assignee: Xian University of Architecture and Technology
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-04-28
Anticipated expiration: 2029-08-16

Abstract

The utility model discloses a large-scale deep basal pit back-supporting steel shotcrete's bearing support structure mainly includes midseat, medium plate, embedded steel bar, body frame and bottom plate, midseat middle part fixed mounting has the body frame, and the subframe that the lateral wall set up through bolt fixed mounting symmetry around the body frame is located the homonymy subframe tip fixed mounting has the roof, the subframe is close to roof department and has seted up the slide opening, roof outside cover is established and is installed the roof-rack, and the roof-rack middle part is run through and is installed and wear the round pin, wears the round pin and runs through the subframe via the slide opening, press between roof lateral wall and the roof-rack inner wall and establish and install the buffer board. The utility model has reasonable structural design, the support structure is flexibly connected with the side wall, and the damage to the main body side wall is small after the enclosure structure is deformed; the side wall does not need to be pre-embedded with a steel plate, so that the integrity of the side wall is ensured, and the use amount of the steel plate is saved; the supporting structure form of components of a whole that can function independently can be divided into the multipart hoist and mount, reduces the hoist and mount degree of difficulty.

Description

Bearing and supporting structure of large deep foundation pit inverted support steel support

Technical Field

The utility model relates to a bearing structure specifically is a large-scale deep basal pit props bearing support structure that steel supported.

Background

Along with the increase of the underground space engineering construction of China, the underground engineering represented by the subway develops faster and faster, the excavation depth of the station foundation pit is deeper and deeper, and in the construction of main body engineering of the station, the steel support back-bracing of the foundation pit is indispensable. In the construction process of the deep foundation pit, the bearing and supporting structure of the steel support is as follows: and a steel plate is embedded in the main body side wall, and a bottom support is welded on the embedded steel plate.

The problems of the existing structure are as follows: the steel support is rigidly connected with the side wall, and the main body side wall is greatly damaged after the enclosure structure deforms; the pre-buried steel plate at the side wall supporting position is easy to seep water and difficult to seep water; the length of the steel support is 25.4m, the dead weight of each steel support is 10 tons, the whole hoisting process is easy to collide, the hoisting precision requirement is high, the hoisting is difficult, and the back-up period is long.

Disclosure of Invention

An object of the utility model is to provide a large-scale deep basal pit backs down bearing support structure who props steel shotcrete to solve the problem that proposes in the above-mentioned background art.

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

a bearing and supporting structure of a large-scale deep foundation pit back-bracing steel support mainly comprises a middle seat, a medium plate, pre-buried steel bars, a main frame and a bottom plate, wherein the middle part of the middle seat is fixedly provided with the main frame, the front side wall and the rear side wall of the main frame are fixedly provided with symmetrically arranged auxiliary frames through bolts, the end parts of the auxiliary frames positioned at the same side are fixedly provided with a top plate, the auxiliary frames are close to the top plate and are provided with sliding holes, the outer side of the top plate is sleeved with a top frame, the middle part of the top frame is provided with a through pin in a penetrating way, the through pin penetrates through the auxiliary frames through the sliding holes, a buffer plate is arranged between the side wall of the top plate and the inner wall of the top frame in a pressing way, the medium plates are fixedly arranged at the two ends of the main frame, the medium plates are fixedly assembled with the auxiliary frames through bolts, the embedded steel bar lower part fixed connection ground, embedded steel bar upper portion and steel bar post lower part lateral wall in close contact with, from interior to overcoat is established between embedded steel bar and the steel bar post and is installed fourth strengthening ring, third strengthening ring, second strengthening ring and the first strengthening ring that the symmetry set up, the cover is established between embedded steel bar and steel bar post and fourth strengthening ring, third strengthening ring, second strengthening ring and the first strengthening ring and is installed the strengthening ring, it has the concrete to fill between bottom plate lower wall and the ground.

As a further aspect of the present invention: and the side wall of the penetrating pin positioned outside the top frame is provided with a limiting pin in a penetrating way.

As a further aspect of the present invention: the reinforcing ring is made by winding and tightening thin steel bars.

As a further aspect of the present invention: the middle part of the main frame is fixedly provided with bolt seats which are arranged at equal intervals, and the middle part of the auxiliary frame is provided with through holes matched with the bolt seats.

As a further aspect of the present invention: the buffer board adopts square asbestos board.

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

the utility model has reasonable structural design, the support structure is flexibly connected with the side wall, and the damage to the main body side wall is small after the enclosure structure is deformed; the side wall does not need to be pre-embedded with a steel plate, so that the integrity of the side wall is ensured, and the use amount of the steel plate is saved; the supporting structure form of components of a whole that can function independently can be divided into the multipart hoist and mount, reduces the hoist and mount degree of difficulty.

Drawings

Fig. 1 is a schematic structural diagram of a load-bearing support structure of a large deep foundation pit inverted support steel support.

Fig. 2 is a top view of a load-bearing support structure of a large deep foundation pit inverted support steel support.

Fig. 3 is a schematic position diagram of the bottom plate and the reinforcing steel bar column in the bearing and supporting structure of the inverted-bracing steel support of the large-scale deep foundation pit at an upward viewing angle.

Fig. 4 is a structural schematic diagram of a main view angle among embedded steel bars, concrete, a bottom plate and steel bar columns in a bearing support structure of a large deep foundation pit inverted support steel support.

Fig. 5 is a structural schematic diagram of a left view angle between a main frame and an auxiliary frame in a bearing and supporting structure of a large deep foundation pit inverted support steel support.

Fig. 6 is a schematic sectional view of a main view angle among a top frame, a buffer plate, a through pin, a middle plate and an auxiliary frame in a bearing support structure of a large deep foundation pit inverted support steel support.

In the figure: the auxiliary frame comprises a middle seat 1, a connecting plate 2, a bolt seat 3, an auxiliary frame 4, a middle plate 5, a top plate 6, a buffer plate 7, a sliding hole 8, a first reinforcing ring 9, concrete 10, embedded steel bars 11, steel bar columns 12, a through pin 13, a top frame 14, a main frame 15, a bottom plate 16, a limiting seat 17, a reinforcing ring 18, a fourth reinforcing ring 19, a third reinforcing ring 20 and a second reinforcing ring 21.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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 is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "disposed" are to be construed broadly, and may for example be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, in an embodiment of the present invention, a load-bearing support structure of a large-scale deep foundation pit back-bracing steel support mainly includes a middle seat 1, a middle plate 5, pre-embedded steel bars 11, a main frame 15 and a bottom plate 16, wherein the middle part of the middle seat 1 is fixedly provided with the main frame 15, the front and back side walls of the main frame are fixedly provided with symmetrically arranged sub-frames 4 through bolts, the end part of the sub-frame 4 located at the same side is fixedly provided with a top plate 6, the position of the sub-frame 4 close to the top plate 6 is provided with a sliding hole 8, the outer side of the top plate 6 is sleeved with a top frame 14, the middle part of the top frame 14 is provided with a through pin 13, the through pin 13 penetrates through the sub-frame 4 through the sliding hole 8, a buffer plate 7 is pressed between the side wall of the top plate 6 and the inner wall of the top frame 14, the two ends of the main frame 15 are, 2 middle parts of connecting rod have spacing seat 17 through bolt fixed mounting, and 17 bottom fixed mountings of spacing seat have

bottom plate

16, and 16 bottom lateral walls fixed mounting of bottom plate has reinforcing bar post 12 that the equidistance was arranged, 11 lower part fixed connection ground of embedded steel bar, 11 upper portions of embedded steel bar and the 12 lower part lateral walls in close contact with of reinforcing bar post, from interior to exterior establish between embedded steel bar 11 and the reinforcing bar post 12 and install the fourth strengthening ring 19, third strengthening ring 20, second strengthening ring 21 and first strengthening ring 9 that the symmetry set up, the cover is established between embedded steel bar 11 and reinforcing bar post 12 and fourth strengthening ring 19, third strengthening ring 20, second strengthening ring 21 and first strengthening ring 9 and is installed strengthening ring 18, it has concrete 10 to fill between 16 lower walls of bottom plate and the ground.

And a limit pin is arranged on the side wall of the penetrating pin 13 positioned outside the top frame 14 in a penetrating way.

The reinforcing ring 18 is made by winding and tightening a thin reinforcing steel bar.

The middle part of the main frame 15 is fixedly provided with bolt seats 3 which are arranged at equal intervals, and the middle part of the auxiliary frame 4 is provided with through holes matched with the bolt seats 3.

The buffer plate 7 is a square asbestos plate.

The utility model discloses a theory of operation is:

the utility model relates to a bearing support structure of large-scale deep basal pit back-bracing steel shotcrete, when using, pre-buried reinforcing bar 11 of arranging at the back-bracing position pre-buried equidistance, cooperate strengthening ring 18 with reinforcing bar 11 through fourth strengthening ring 19, third strengthening ring 20, second strengthening ring 21 and first strengthening ring 9 and fixedly connect reinforcing bar post 12 with pre-buried reinforcing bar 11, later pack concrete 10 between bottom plate 16 lower wall and ground, form the fixed supporting seat, the bearing capacity is big, the structure is safe and reliable, not only can satisfy the bearing requirement of steel shotcrete back-bracing, and be convenient for the back-bracing hoist and mount of body frame 15 through spacing seat 17 at bottom plate 16 top, spacing stability is better, later fix subframe 4 on body frame 15 through the bolt, later cover the top frame 14 cover that embeds there is buffer board 7 at the tip of subframe 4 through wearing round pin 13, after accomplishing, top frame 14 lateral wall closely contacts the side wall that is supported, the side wall of the main body is not required to be provided with an embedded steel plate and a bottom support, so that the using amount of the steel plate is reduced, the side wall is not embedded with steel bars, the integrity of the side wall is ensured, the water seepage diseases of the wall are reduced, the stability of the side wall is ensured through the deformation of the buffer plate 7 in a certain range, the rigid connection is avoided, the damage to the side wall of the main body is small after the enclosure structure is deformed, the split support structure can be divided into a plurality of parts for hoisting, the hoisting difficulty is reduced, the support structure is flexibly connected with the side wall, and the damage to the side wall of the main; the side wall does not need to be pre-embedded with a steel plate, so that the integrity of the side wall is ensured, and the use amount of the steel plate is saved; the supporting structure form of components of a whole that can function independently can be divided into the multipart hoist and mount, reduces the hoist and mount degree of difficulty.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The bearing support structure of the large-scale deep foundation pit back-bracing steel support mainly comprises a middle seat (1), a middle plate (5), embedded steel bars (11), a main frame (15) and a bottom plate (16), and is characterized in that the middle part of the middle seat (1) is fixedly provided with the main frame (15), the front side wall and the rear side wall of the main frame are fixedly provided with auxiliary frames (4) which are symmetrically arranged through bolts, the end parts of the auxiliary frames (4) positioned at the same side are fixedly provided with a top plate (6), the positions of the auxiliary frames (4) close to the top plate (6) are provided with sliding holes (8), the outer side of the top plate (6) is sleeved with a top frame (14), the middle part of the top frame (14) is provided with a penetrating pin (13) in a penetrating way, the penetrating pin (13) penetrates through the auxiliary frames (4) through the sliding holes (8), a buffer plate (7) is arranged between the side wall of the top plate (6) and the, middle plate (5) is through bolt and subframe (4) fixed mounting, both ends fixed mounting has connecting rod (2) around middle seat (1), and there is spacing seat (17) at connecting rod (2) middle part through bolt fixed mounting, and spacing seat (17) bottom fixed mounting has bottom plate (16), and bottom plate (16) bottom lateral wall fixed mounting has steel bar post (12) that the equidistance was arranged, embedded bar (11) lower part fixed connection ground, embedded bar (11) upper portion and steel bar post (12) lower part lateral wall in close contact with, from interior and overcoat is established between embedded bar (11) and steel bar post (12) and is installed fourth strengthening ring (19), third strengthening ring (20), second strengthening ring (21) and first strengthening ring (9) that the symmetry set up, embedded bar (11) and steel bar post (12) and fourth strengthening ring (19), third strengthening ring (20), A reinforcing ring (18) is sleeved between the second reinforcing ring (21) and the first reinforcing ring (9), and concrete (10) is filled between the lower wall of the bottom plate (16) and the ground.

2. The heavy deep foundation pit inverted bracing steel support bearing support structure according to claim 1, wherein a limit pin is installed through the side wall of the through pin (13) outside the top frame (14).

3. The heavy deep foundation pit inverted bracing steel support bearing support structure according to claim 1, wherein the reinforcing ring (18) is made by winding and tightening thin steel bars.

4. The bearing and supporting structure of the inverted bracing steel support of the large-scale deep foundation pit according to claim 1, wherein the bolt seats (3) are fixedly arranged in the middle of the main frame (15) at equal intervals, and the through holes matched with the bolt seats (3) are formed in the middle of the auxiliary frame (4).

5. The large deep foundation pit inverted bracing steel support bearing support structure according to claim 1, wherein the buffer plate (7) is a square asbestos plate.