CN114032919A - Assembled suspension supporting device and method for foundation pit supporting - Google Patents

Abstract

The invention provides an assembled suspension support device and method for foundation pit support, which relate to the field of foundation pit support and comprise a plurality of groups of stand columns arranged at intervals and a plurality of groups of lattice beams horizontally arranged, wherein the lattice beams are fixedly connected with the stand columns and are positioned on the same vertical plane, the lattice beams bear the horizontal pressure of the inner wall side of a foundation pit, and the space at the upper part of the foundation pit is effectively utilized through a suspension structure system, so that the space between the stand columns is increased, and a larger construction space is provided for excavating the lower part of the foundation pit; the lattice beam has the advantages of high portability and bearing capacity, and can bear larger axial load; the components can be freely combined and assembled according to the stress of the foundation pit, and the flexibility is high; the assembly type construction is convenient and fast, can be repeatedly used, and is green and environment-friendly.

Description

Assembled suspension supporting device and method for foundation pit supporting

Technical Field

The invention relates to the field of foundation pit support, in particular to an assembled suspension supporting device and method for foundation pit support.

Background

Common types of existing foundation pit supports include concrete supports, steel structure supports and the like, wherein the concrete supports are widely adopted, but the concrete supports are disposable, so that the resource waste is serious, the dismantling workload is large, the volume of the dismantled garbage is large, and the transportation is difficult; and steel construction is strutted and is the plane shape, be difficult to effectively utilize foundation ditch upper portion space, and because steel construction horizontal brace stability is relatively poor than the concrete, can produce great temperature stress when the foundation ditch span is great, the stand interval that causes foundation ditch support mostly is 8 meters to 15 meters, lead to the lower part construction space less, the construction degree of difficulty is big, consequently how realize resource cyclic utilization in the foundation ditch support field, reduce carbon emission, and the construction space of increase foundation ditch has become the technological problem that the field is waited to solve urgently.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects in the prior art and provides an assembled suspension supporting device and method for foundation pit supporting.

The invention is realized by the following technical scheme: the utility model provides an assembled strutting arrangement that suspends in midair for excavation supporting, includes the lattice roof beam that the stand and the multiunit level that the multiunit interval set up were laid, lattice roof beam and stand fixed connection, and multiunit lattice roof beam are in same vertical plane, and the lattice roof beam bears the horizontal pressure of excavation inner wall side.

According to the technical scheme, the steel frame structure is preferable to further comprise an inclined strut rod, and two ends of the inclined strut rod are fixedly connected with the lattice beam and the upright column which are located on the uppermost side respectively.

According to the above technical solution, preferably, adjacent lattice beams are connected by a suspension post.

According to the technical scheme, the steel wire rope truss structure further comprises a plurality of groups of web members, and two ends of each web member are fixedly connected with the diagonal bracing members and the lattice beams respectively.

According to the technical scheme, preferably, the lattice beam comprises four groups of parallel chords and a plurality of groups of rectangular connecting pieces, four ends of each rectangular connecting piece are fixedly connected with the chords respectively, and reinforcing rods are arranged in the rectangular connecting pieces.

According to the above technical solution, preferably, the lattice beams, the columns, the diagonal bracing members and the suspension columns are all made of steel pipe concrete members, and the web members are made of steel pipe members.

According to the technical scheme, preferably, the lattice beam, the upright column, the diagonal bracing member, the hanging column and the web member are all connected through standard flange joints.

The invention also provides an assembly type suspension supporting method for foundation pit supporting, which adopts the assembly type suspension supporting device for foundation pit supporting and comprises the following steps:

(1) inserting the upright column into the set depth of the foundation pit according to the depth of the foundation pit;

(2) horizontally hoisting the lattice beam on the uppermost layer to the upright column and fixedly connecting the lattice beam with the upright column;

(3) installing an inclined strut rod piece, and fixedly connecting two ends of the inclined strut rod piece with the lattice beam and the upright post which are positioned on the uppermost side respectively; and simultaneously, the two ends of the web member are respectively and fixedly connected with the diagonal bracing member and the lattice beam;

(4) and (5) erecting lattice beams and hanging columns of corresponding soil layers along with the completion of the layer-by-layer excavation of the soil layers.

The invention has the beneficial effects that:

(1) the upper space of the foundation pit is effectively utilized through the suspension structure system, so that the distance between the stand columns is increased, and a larger construction space is provided for excavating the lower part of the foundation pit;

(2) the lattice beam has the advantages of high portability and bearing capacity, and can bear larger axial load;

(4) the components can be freely combined and assembled according to the stress of the foundation pit, and the flexibility is high;

(5) the assembly type construction is convenient and fast, can be repeatedly used, and is green and environment-friendly.

Drawings

FIG. 1 illustrates an isometric schematic structural view according to an embodiment of the present invention;

FIG. 2 illustrates a front view structural schematic according to an embodiment of the present invention;

FIG. 3 illustrates a schematic top view of the structure mounted within a foundation pit according to an embodiment of the invention;

in the figure: 1. a column; 2. a lattice beam; 3. a diagonal brace member; 4. a web member; 5. hoisting a column; 6. a chord member; 7. a rectangular connecting piece; 8. and a supporting device.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in the figure, the invention provides an assembled suspension support device 8 for foundation pit support, which comprises a plurality of groups of columns 1 arranged at intervals, a plurality of groups of lattice beams 2 arranged horizontally, a plurality of groups of diagonal bracing members 3 and a plurality of groups of web members 4, wherein the lattice beams 2 are fixedly connected with the columns 1, the plurality of groups of lattice beams 2 are positioned on the same vertical plane, the lattice beams 2 bear the horizontal pressure on the inner wall side of a foundation pit, two ends of each diagonal bracing member 3 are respectively and fixedly connected with the lattice beam 2 and the column 1 positioned at the uppermost side, two ends of each web member 4 are respectively and fixedly connected with the diagonal bracing members 3 and the lattice beams 2, the diagonal bracing members 3 and the web members 4 are used for bearing the vertical load of the lattice beams 2, so that the interval between the columns 1 can reach 15-40m, and the requirement of increasing the construction space at the bottom of the foundation pit is realized.

According to the above embodiment, preferably, the adjacent lattice beams 2 are connected by the hanging columns 5, so that the lattice beams 2 at the lower layer can be conveniently added, and the stability of the foundation pit support is further enhanced.

According to the above embodiment, preferably, the lattice beam 2 includes four parallel chords 6 and a plurality of sets of rectangular connectors 7, four ends of the rectangular connectors 7 are respectively and fixedly connected with the chords 6, and reinforcing rods are arranged in the rectangular connectors 7, so that the overall strength of the lattice beam 2 is increased while the size of the lattice beam is reduced.

According to the above embodiment, it is preferable that the lattice girders 2, the columns 1, the diagonal bracing members 3, and the suspension posts 5 are all made of concrete filled steel tube members which are filled with concrete and can bear a large axial load, and the web members 4 are made of steel tube members and are all made of a fixed-length standard.

According to the embodiment, preferably, the lattice beam 2, the upright post 1, the diagonal bracing member 3, the suspension post 5 and the web member 4 are connected through the standard flange joints, and the reinforcing ribs are additionally arranged at the joints, so that the force transmission of the joints can be ensured, the steel pipe and the concrete can work together, and the splicing and recycling according to the size of the foundation pit are realized.

Based on the assembled suspension support device 8 for foundation pit support, the invention also provides an assembled suspension support method for foundation pit support, which comprises the following steps:

(1) inserting the upright post 1 into the set depth of the foundation pit according to the depth of the foundation pit;

(2) horizontally hoisting the lattice beam 2 positioned on the uppermost layer onto the upright post 1, and fixedly connecting the lattice beam with the upright post 1;

(3) installing an inclined strut rod piece 3, and fixedly connecting two ends of the inclined strut rod piece 3 with the lattice beam 2 and the upright post 1 which are positioned at the uppermost side respectively; and simultaneously, two ends of the web member 4 are respectively and fixedly connected with the diagonal bracing member 3 and the lattice beam 2;

(4) along with the completion of the layer-by-layer excavation of the soil layer, the latticed beams 2 and the hanging columns 5 of the corresponding soil layer are erected, namely the second layer of latticed beams 2 are connected with the first layer of latticed beams 2 through the hanging columns 5 to form an auxiliary supporting structure of the second layer of latticed beams 2, similarly, the second layer of latticed beams 2 and the downward hanging columns 5 form an auxiliary supporting structure of the third layer of latticed beams 2, the operation space between the second layer of latticed beams 2 and the downward hanging columns 5 can be ensured by analogy in sequence, the plurality of layers of latticed beams 2 can be arranged, the hanging columns 5 serving as the auxiliary structures are not installed at the moment when each layer of soil layer is excavated, and the lower layer of latticed beams 2 and the corresponding hanging columns 5 are erected after each layer of soil layer is excavated.

The invention has the beneficial effects that:

(1) the upper space of the foundation pit is effectively utilized through the suspension structure system, so that the distance between the stand columns 1 is increased, and a larger construction space is provided for excavating the lower part of the foundation pit;

(2) the lattice beam 2 has the advantages of high portability and bearing capacity, and can bear larger axial load;

(4) the components can be freely combined and assembled according to the stress of the foundation pit, and the flexibility is high;

(5) the assembly type construction is convenient and fast, can be repeatedly used, and is green and environment-friendly.

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 describing the invention and simplifying the 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 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 invention, it is to 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. The utility model provides an assembled strutting arrangement that suspends in midair for excavation supporting, its characterized in that includes the stand that the multiunit interval set up and the latticed roof beam that the multiunit level was laid, latticed roof beam with stand fixed connection, and multiunit latticed roof beam are in same vertical plane, and the latticed roof beam bears the horizontal pressure of foundation ditch inner wall side.

2. The assembly type suspension supporting device for foundation pit support of claim 1, further comprising a diagonal member, wherein two ends of the diagonal member are respectively and fixedly connected with the lattice beam and the upright column positioned at the uppermost side.

3. The fabricated suspension support device for foundation pit support of claim 2, wherein adjacent lattice beams are connected by suspension posts.

4. The assembly type suspension supporting device for foundation pit support of claim 3, further comprising a plurality of groups of web members, wherein two ends of the web members are respectively fixedly connected with the diagonal bracing members and the lattice beams.

5. The assembly type suspension supporting device for foundation pit support according to claim 4, wherein the lattice beam comprises four groups of parallel chords and a plurality of groups of rectangular connecting pieces, four ends of each rectangular connecting piece are fixedly connected with the chords respectively, and reinforcing rods are arranged in the rectangular connecting pieces.

6. The fabricated suspension support device for foundation pit support according to claim 5, wherein the lattice beams, the columns, the diagonal bracing members and the suspension posts are all made of steel pipe concrete members, and the web members are made of steel pipe members.

7. The fabricated suspension support device for foundation pit support of claim 6, wherein the lattice beam, the upright column, the diagonal bracing members, the suspension post and the web member are all connected by standard flange joints.

8. An assembled suspension supporting method for foundation pit supporting, which is characterized in that the assembled suspension supporting device for foundation pit supporting of claim 7 is adopted, and comprises the following steps:

(1) inserting the upright column into the set depth of the foundation pit according to the depth of the foundation pit;

(2) horizontally hoisting the lattice beam on the uppermost layer to the upright column and fixedly connecting the lattice beam with the upright column;

(3) installing an inclined strut rod piece, and fixedly connecting two ends of the inclined strut rod piece with the lattice beam and the upright post which are positioned on the uppermost side respectively; and simultaneously, the two ends of the web member are respectively and fixedly connected with the diagonal bracing member and the lattice beam;

(4) and (5) erecting lattice beams and hanging columns of corresponding soil layers along with the completion of the layer-by-layer excavation of the soil layers.

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