CN110847189A

CN110847189A - Fabricated foundation pit upright post underpinning structure

Info

Publication number: CN110847189A
Application number: CN201911330323.6A
Authority: CN
Inventors: 黄致兴; 姜晓光; 梁伟桥; 王召磊; 马卓; 杨晶明; 林斌; 王艺霖; 陶宇
Original assignee: Metallurgical Construction Research Institute (shenzhen) Co Ltd; China Jingye Engineering Corp Ltd
Current assignee: Metallurgical Construction Research Institute (shenzhen) Co Ltd; Central Research Institute of Building and Construction Co Ltd MCC Group; China Jingye Engineering Corp Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-02-28

Abstract

The invention discloses an assembled foundation pit upright post underpinning structure which is used for dismantling a foundation pit upright post between two supporting cross beams and comprises two support posts, a bracket beam and a jacking piece, wherein the two support posts are respectively positioned on two sides of the supporting cross beam, two ends of the bracket beam are respectively detachably connected with the two support posts, one end of the jacking piece is detachably connected with the bracket beam, the other end of the jacking piece is detachably connected with the supporting cross beam, and the jacking piece can jack up the supporting cross beam. The assembled foundation pit stand underpins the structure simple structure, convenient and practical, and can dismantle fast after finishing using, convenient recycle.

Description

Fabricated foundation pit upright post underpinning structure

Technical Field

The invention relates to the technical field of building structures, in particular to an assembled foundation pit stand column underpinning structure.

Background

The foundation pit engineering is a soil retaining structure, underground water control, environmental protection and other measures required for ensuring the safety and stability of an underground space formed by downward excavation of the ground during the construction of an underground structure. Because the excavation period of the existing project is short, the foundation pit construction is often carried out under the condition that the underground structure scheme is not determined, and if the foundation pit adopts a pile-supported supporting mode, the inner supporting system and the underground structure can conflict, so that the construction of a main structure is influenced.

The existing underpinning technology is mainly used for structures such as bridges, tunnels, subway stations and the like, and has the disadvantages of complex underpinning structure, high underpinning cost, long construction period and non-recyclability. The foundation pit engineering belongs to temporary engineering, and construction period is short, requires that the underpinning structure is with low costs, erects simply and recoverable, and at present, does not have the suitable underpinning structure to the foundation pit engineering.

Disclosure of Invention

The invention aims to provide an assembly type foundation pit stand underpinning structure which is simple in structure, convenient and practical, can be quickly disassembled after being used and is convenient to recycle.

In order to achieve the technical effects, the technical scheme of the fabricated foundation pit upright post underpinning structure is as follows:

the invention discloses an assembled foundation pit stand column underpinning structure, which is used for dismantling a foundation pit stand column between two supporting cross beams and comprises: the number of the pillars is two, and the two pillars are respectively positioned on two sides of the supporting cross beam; the two ends of the bracket beam are respectively detachably connected with the two pillars; and one end of the jacking piece is detachably connected with the bracket beam, the other end of the jacking piece is detachably connected with the supporting cross beam, and the jacking piece can jack up the supporting cross beam.

In some embodiments, the fabricated foundation pit column underpinning structure further comprises; the independent foundation is arranged on the ground; the column foot plates are two, each column foot plate is connected between the independent foundation and the support column, one side of each column foot plate is connected with the support column in a welded mode, and the other side of each column foot plate is detachably connected with the independent foundation through a first connecting piece.

In some embodiments, the fabricated foundation pit upright underpinning structure further comprises two bracket connecting plates, each bracket connecting plate is connected between the bracket beam and the pillar, one side of each bracket connecting plate is connected with the bracket beam in a welding mode, and the other side of each bracket connecting plate is connected with the pillar through a second connecting piece.

In some embodiments, the fabricated foundation pit column underpinning structure further comprises a supporting connecting plate, the supporting connecting plate is clamped between the jacking piece and the supporting cross beam, and the supporting connecting plate is detachably connected with the supporting cross beam through a third connecting piece.

In some specific embodiments, the fabricated foundation pit column underpinning structure further comprises a guide assembly, and the guide assembly comprises: a first guide member having one end connected to the bracket beam; and one end of the second guide piece is connected with the supporting connecting plate, and the other end of the second guide piece is sleeved on the other end of the first guide piece.

In some more specific embodiments, the guide assembly further comprises a guide connecting plate connected between the bracket beam and the first guide member, one end of the guide connecting plate is welded to the first guide member, and the other end is detachably connected to the bracket beam by a fourth connecting member.

In some optional embodiments, the first guide comprises two first channel steels with opposite openings, and the second guide comprises two second channel steels with opposite openings.

In some optional embodiments, each of the pillars includes a plurality of square pipes which are sequentially spliced, and two adjacent square pipes are connected by using an angle steel and a fifth connecting member.

In some alternative embodiments, the jacking members comprise jacks.

According to the fabricated foundation pit upright post underpinning structure, the bracket beam is detachably connected with the support post, and the two ends of the jacking piece are respectively detachably connected with the supporting beam and the bracket beam, so that the supporting beam can be quickly installed to underpin the supporting beam and the foundation pit upright post can be removed.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of an assembled foundation pit column underpinning structure according to an embodiment of the present invention.

Fig. 2 is a schematic partial structural view of an assembled foundation pit column underpinning structure according to an embodiment of the present invention.

Fig. 3 is an exploded view of the structure shown in fig. 2.

Reference numerals:

1. a pillar; 2. a bracket beam; 3. a jacking piece; 4. an independent foundation; 5. a toe plate; 6. a bracket connecting plate; 7. supporting the connecting plate; 8. a guide assembly; 81. a first guide member; 82. a second guide member; 83. a guide connecting plate; 9. angle steel;

100. a foundation pit upright post; 200. and supporting the cross beam.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The specific structure of the fabricated foundation pit column underpinning structure according to the embodiment of the invention is described below with reference to fig. 1 to 3.

As shown in fig. 1-3, the invention discloses an assembly type foundation pit upright post underpinning structure, which is used for dismantling a foundation pit upright post 100 between two supporting cross beams 200, and comprises two support posts 1, two bracket beams 2 and two jacking members 3, wherein the two support posts 1 are respectively positioned at two sides of the supporting cross beams 200, two ends of the bracket beams 2 are respectively detachably connected with the two support posts 1, one end of each jacking member 3 is detachably connected with the bracket beam 2, the other end of each jacking member is detachably connected with the supporting cross beam 200, and the jacking members 3 can jack up the supporting cross beams 200.

It will be appreciated that in the actual dismantling process, two columns 1 are first placed on both sides of the foundation pit upright 100 to be dismantled, then the bracket beam 2 is mounted on the two columns 1, and the jacking members 3 are mounted on the bracket beam 2. After all the parts are installed, the supporting cross beam 200 is jacked up by the jacking piece 3, so that when the jacking force of the jacking piece 3 reaches a specified value, the to-be-disassembled cutting and disassembling of the foundation pit upright 100 and the supporting cross beam 200 can be carried out. Make the use of the fabricated foundation pit stand underpinning structure of this embodiment very convenient like this to this fabricated foundation pit stand underpins structure is comparatively simple, and easy to assemble has shortened foundation pit stand 100's dismantlement time limit.

In addition, both ends of the jack 3 are detachably coupled with the support beam 200 and the bracket beam 2, respectively, due to the detachable coupling between the bracket beam 2 and the pillar 1. Therefore, after the foundation pit support is replaced (namely after the foundation pit support system is stressed and converted to the main structure), the bracket beam 2 can be detached from the strut 1, and the jacking piece 3 is detached from the supporting beam 200 and the bracket beam 2, so that the assembled foundation pit upright post replacement structure can be detached after one-time use is finished so as to realize repeated use.

According to the fabricated foundation pit upright post underpinning structure, due to the jacking piece 3 capable of jacking the supporting cross beam 200, the bracket beam 2 supporting the jacking piece 3 and the support post 1, the jacking piece 3 can jack the supporting cross beam 200 in the using process, so that an operator can conveniently cut and disassemble the foundation pit upright post 100 and the supporting cross beam 200, and the disassembly period of the foundation pit upright post 100 is shortened. In addition, because the bracket beam 2 and the pillar 1 are detachably connected, and two ends of the jacking piece 3 are detachably connected with the supporting beam 200 and the bracket beam 2 respectively, the repeated recycling of the fabricated foundation pit upright underpinning structure is realized.

In some embodiments, the fabricated foundation pit and column underpinning structure further comprises an independent foundation 4 and two column foot plates 5, wherein the independent foundation 4 is arranged on the ground, the number of the column foot plates 5 is two, each column foot plate 5 is connected between the independent foundation 4 and the support column 1, one side of each column foot plate 5 is connected with the support column 1 in a welding mode, and the other side of each column foot plate 5 is detachably connected with the independent foundation 4 through a first connecting piece.

It can be understood that the support column 1 is connected to the independent foundation 4 through the column foot plate 5, so that the stability of the support column 1 is improved, the construction accident caused by toppling of the support column 1 in the construction process is avoided, and the use safety of the fabricated foundation pit stand column underpinning structure is improved.

Advantageously, in an embodiment of the invention, the first connection means comprise a connection anchor embedded in the independent foundation 4 and a connection nut fitted on the connection anchor. From this, adopt the structure of connecting the crab-bolt cooperation coupling nut can promote the joint strength between footing 5 and the independent basis 4 to the stability of pillar 1 has been promoted. Of course, in other embodiments of the present invention, the first connecting member may be formed in other connecting structures, and is not limited to the structure of the connecting anchor and the connecting nut of the present embodiment.

In some embodiments, the fabricated foundation pit column underpinning structure further comprises two bracket connecting plates 6, each bracket connecting plate 6 is connected between the bracket beam 2 and the pillar 1, one side of each bracket connecting plate 6 is connected with the bracket beam 2 in a welding mode, and the other side of each bracket connecting plate 6 is connected with the pillar 1 through a second connecting piece. It can be understood that the bracket beam 2 is connected to the support column 1 through the bracket connecting plate 6, so that the stability of the bracket beam 2 is improved, the construction accident caused by falling of the bracket beam 2 in the construction process is avoided, and the use safety of the fabricated foundation pit upright post underpinning structure is improved.

Advantageously, in an embodiment of the invention, the second connection means comprise a connection bolt passing through the stanchion 1 and the bracket connection plate 6 and a connection nut fitted on the connection bolt. Therefore, the structure that the connecting bolt is matched with the connecting nut can improve the connecting strength between the bracket connecting plate 6 and the strut 1, so that the stability of the bracket beam 2 is improved. Of course, in other embodiments of the present invention, the second connecting member may also be formed into other connecting structures, and is not limited to the structure of the connecting bolt and the connecting nut of the present embodiment.

In some embodiments, the fabricated foundation pit column underpinning structure further comprises a supporting connecting plate 7, the supporting connecting plate 7 is clamped between the jacking piece 3 and the supporting cross beam 200, and the supporting connecting plate 7 is detachably connected with the supporting cross beam 200 through a third connecting piece. It can be understood that the jacking pieces 3 are connected to the supporting cross beam 200 through the bracket connecting plates 6, so that the stability of the jacking pieces 3 is improved, and the phenomenon that the jacking pieces 3 shake in the construction process and cannot stably jack the supporting cross beam 200 is avoided.

Advantageously, in an embodiment of the invention, the third connecting means comprise a connecting anchor passing through the supporting cross-member 200 and the supporting connecting plate 7 and a connecting nut fitted on the connecting anchor. Therefore, the structure of the connecting anchor bolt matched with the connecting nut can improve the connection strength between the supporting connecting plate 7 and the supporting cross beam 200, so that the stability of the jacking piece 3 is improved. Of course, in other embodiments of the present invention, the third connecting member can also be formed into other connecting structures, and is not limited to the structure of the connecting anchor bolt and the connecting nut of the present embodiment.

In some specific embodiments, the fabricated foundation pit column underpinning structure further comprises a guide assembly 8, the guide assembly 8 comprises a first guide 81 and a second guide 82, one end of the first guide 81 is connected with the bracket beam 2, one end of the second guide 82 is connected with the support connecting plate 7, and the other end is sleeved on the other end of the first guide 81. It can be understood that, because a pot head of second guide 82 is established on first guide 81, when jacking 3 jacking supporting beam 200 like this, because the limiting effect of first guide 81 to second guide 82 makes supporting beam 200 can only produce the displacement of vertical direction, can also restrain the deformation of whole assembled foundation ditch stand underpinning structure in addition, has guaranteed the stability of assembled foundation ditch stand underpinning structure.

In some more specific embodiments, the guide assembly 8 further comprises a guide connecting plate 83, the guide connecting plate 83 is connected between the carrier beam 2 and the first guide 81, one end of the guide connecting plate 83 is connected to the first guide 81 by welding, and the other end is detachably connected to the carrier beam 2 by a fourth connecting member. Therefore, the installation and the disassembly of the guide assembly 8 by a user are facilitated, the connection stability between the guide assembly 8 and the bracket beam 2 can be well ensured, and the guide effect of the guide assembly 8 is ensured.

Advantageously, in the embodiment of the invention, the fourth connecting element comprises a connecting anchor passing through the carrier bar 2 and the guide web 83 and a connecting nut engaging on the connecting anchor. Thus, the structure in which the connection anchor is fitted with the connection nut can enhance the strength of connection between the guide connection plate 83 and the bracket beam 2, thereby enhancing the stability of the guide assembly 8. Of course, in other embodiments of the present invention, the fourth connecting member can also be formed into other connecting structures, and is not limited to the structure of the connecting anchor bolt and the connecting nut of the present embodiment.

Advantageously, the bracket beam 2 is made of an i-steel profile, which can reduce the production cost of the fabricated foundation pit column underpinning structure.

In some alternative embodiments, the first guide 81 includes two first channel beams with opposite openings, and the second guide 82 includes two second channel beams with opposite openings. The channel steel is adopted as the guide piece, so that the cost of the guide assembly 8 can be well reduced, and the production cost of the whole fabricated foundation pit stand underpinning structure is reduced.

In some optional embodiments, each pillar 1 includes a plurality of square pipes spliced in sequence, and two adjacent square pipes are connected by angle steel 9 and a fifth connecting member. It will be appreciated that the length of the square tube is typically 3m, 6m, 9 m. Therefore, square pipes with different lengths can be selected to be spliced into the support column 1 according to actual needs in the actual use process, so that the production cost is reduced on one hand, and the transportation and assembly of the support column are facilitated on the other hand.

In some alternative embodiments, the jacking members 3 are jacks. Of course, in other embodiments of the present invention, the jacking member 3 may also be other mechanisms capable of performing jacking, and is not limited to the jack of this embodiment.

Example (b):

the fabricated foundation pit post underpinning structure of one embodiment of the present invention is described below with reference to fig. 1-3.

As shown in fig. 1-3, the fabricated foundation pit column underpinning structure of the present embodiment includes a pillar 1, a bracket beam 2, a jacking member 3, an independent foundation 4, a toe board 5, a bracket connecting plate 6, and a support connecting plate 7. The pillar 1 is two, and two pillars 1 are located supporting beam 200's both sides respectively, and every pillar 1 all has two square pipes to splice and forms and adopt angle steel 9 and fifth connecting piece to link to each other between two adjacent square pipes. The number of the bracket beams 2 is two, and the two bracket beams 2 are distributed at intervals along the extending direction of the pillar 1. Independent basis 4 is connected subaerial, and toe board 5 is two, and every toe board 5 is connected between independent basis 4 and pillar 1, and one side of every toe board 5 links to each other with pillar 1 welding, and the opposite side can be dismantled with independent basis 4 through first connecting piece and link to each other. The number of the bracket connecting plates 6 is four, each bracket connecting plate 6 is connected between the bracket beam 2 and the strut 1, one side of each bracket connecting plate 6 is connected with the bracket beam 2 in a welding mode, and the other side of each bracket connecting plate 6 is connected with the strut 1 through a second connecting piece. The number of the supporting and connecting plates 7 is two, each supporting and connecting plate 7 is clamped between one jacking piece 3 and one supporting cross beam 200, and each supporting and connecting plate 7 is detachably connected with the first supporting cross beam 200 through a third connecting piece.

The number of the guide assemblies 8 is four, each guide assembly 8 comprises a first guide member 81, a second guide member 82 and a guide connecting plate 83, one end of the first guide member 81 is connected with one side of the guide connecting plate 83 in a welding manner, and the other side of the guide connecting plate 83 is detachably connected with the bracket beam 2 through a fourth connecting member. One end of the second guide 82 is connected to the support connection plate 7, and the other end is fitted over the other end of the first guide 81. Each first guide 81 includes two first channel steels with opposite openings, and each second guide 82 includes two second channel steels with opposite openings.

The fabricated foundation pit upright post underpinning structure of the embodiment achieves the purpose of dismantling the conflict upright post, and has the advantages of safety, reliability, short construction period, low construction cost, energy conservation and the like.

In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims

1. The utility model provides an assembled foundation ditch stand underpins structure, its characterized in that, assembled foundation ditch stand underpins structure is used for demolising foundation ditch stand (100) between two supporting beam (200), assembled foundation ditch stand underpins structure includes:

the number of the pillars (1) is two, and the two pillars (1) are respectively positioned on two sides of the supporting cross beam (200);

the two ends of the bracket beam (2) are respectively detachably connected with the two pillars (1);

the support beam comprises a jacking piece (3), one end of the jacking piece (3) is detachably connected with the bracket beam (2), the other end of the jacking piece is detachably connected with the support beam (200), and the jacking piece (3) can jack up the support beam (200).

2. The fabricated foundation pit column underpinning structure of claim 1, wherein the fabricated foundation pit column underpinning structure further comprises;

the independent foundation (4), the said independent foundation (4) is set up on the ground;

toe board (5), toe board (5) are two, every toe board (5) are connected independent basis (4) with between pillar (1), every one side of toe board (5) with pillar (1) welding links to each other, the opposite side through first connecting piece with independent basis (4) can be dismantled continuously.

3. The fabricated foundation pit column underpinning structure of claim 1, characterized in that the fabricated foundation pit column underpinning structure further comprises two bracket connecting plates (6), each bracket connecting plate (6) is connected between the bracket beam (2) and the pillar (1), one side of each bracket connecting plate (6) is welded with the bracket beam (2), and the other side is connected with the pillar (1) through a second connecting piece.

4. The fabricated foundation pit column underpinning structure according to claim 1, characterized in that the fabricated foundation pit column underpinning structure further comprises a supporting connecting plate (7), the supporting connecting plate (7) is clamped between the jacking piece (3) and the supporting cross beam (200), and the supporting connecting plate (7) is detachably connected with the supporting cross beam (200) through a third connecting piece.

5. The fabricated foundation pit column underpinning structure of claim 4, characterized in that it further comprises a guiding component (8), said guiding component (8) comprising:

a first guide member (81), one end of the first guide member (81) being connected to the carriage beam (2);

and one end of the second guide piece (82) is connected with the supporting connecting plate (7), and the other end of the second guide piece (82) is sleeved on the other end of the first guide piece (81).

6. The fabricated foundation pit column underpinning structure of claim 5, characterized in that the guide assembly (8) further comprises a guide connecting plate (83), the guide connecting plate (83) is connected between the bracket beam (2) and the first guide (81), one end of the guide connecting plate (83) is connected with the first guide (81) in a welding way, and the other end is detachably connected with the bracket beam (2) through a fourth connecting piece.

7. The fabricated foundation pit column underpinning structure of claim 5, wherein the first guide (81) comprises two first channel steels with opposite openings, and the second guide (82) comprises two second channel steels with opposite openings.

8. The fabricated foundation pit upright post underpinning structure as claimed in claim 1, wherein each strut (1) comprises a plurality of square tubes which are spliced in sequence, and two adjacent square tubes are connected by angle steel (9) and a fifth connecting piece.

9. The fabricated foundation pit column underpinning structure of any one of claims 1-8, characterized in that the jacking piece (3) comprises a jack.