CN212270958U

CN212270958U - Inner supporting structure for foundation pit

Info

Publication number: CN212270958U
Application number: CN202020718532.XU
Authority: CN
Inventors: 刁邦宏; 陈军培; 张龙武; 徐志海; 袁兴明; 李跃丰; 高双
Original assignee: Guangdong Yuji Construction Engineering Co ltd
Current assignee: Guangdong Yuji Construction Engineering Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-01-01
Anticipated expiration: 2030-04-30

Abstract

The utility model relates to the technical field of foundation pit protection, more specifically, it relates to an inner supporting structure of foundation pit, it includes first bearing structure and second bearing structure, the material of first bearing structure is cast-in-place reinforced concrete, first bearing structure includes the first purlin that sets up above two relative wall bodies of foundation pit fixedly and sets up the first bracing piece between two first purlins, first bracing piece has a plurality ofly; the second supporting structure is of a steel structure and comprises two second enclosing purlins fixedly arranged on the two opposite wall bodies of the foundation pit, and a second supporting rod fixedly arranged between the two second enclosing purlins of the foundation pit, wherein the second supporting rod is provided with a plurality of parts. The utility model discloses the in-process of installing and dismantling has labour saving and time saving's advantage.

Description

Inner supporting structure for foundation pit

Technical Field

The utility model belongs to the technical field of the technique of foundation ditch protection and specifically relates to a bearing structure in foundation ditch is related to.

Background

At present, a foundation pit is an earth pit excavated at a foundation design position according to the base elevation and the base plane size. Before excavation, an excavation scheme is determined according to geological and hydrological data and the conditions of buildings nearby the site, and waterproof drainage work is performed. The persons with low excavation depth can use the method of putting side slope to make the earth slope stable, and the size of the slope is determined according to the relevant construction project. When a deeper foundation pit and a building adjacent to the deeper foundation pit are excavated, a foundation pit wall supporting method, a concrete-sprayed wall protecting method and a large foundation pit are used, and even an underground continuous wall and a columnar column type bored pile are used for interlocking, so that an outer soil layer is prevented from collapsing; for those who have no influence on nearby buildings, the underground water level can be reduced by a well point method, and slope releasing open cut is adopted; in cold areas, natural cold air freezing method can be adopted for excavation and the like.

The existing Chinese patent with publication number CN1090183155A discloses an inner supporting structure of a foundation pit, wherein the supporting structure is arranged in the foundation pit and comprises a cast-in-situ bored pile, lattice columns arranged in the cast-in-situ bored pile, supporting piles attached to the wall of the foundation pit, palm plate belts arranged on the supporting piles at intervals, a first horizontal inner support, a second horizontal inner support, angle braces and a protective surface layer, the first horizontal inner support and the second horizontal inner support are arranged between two adjacent lattice columns at intervals, and the top surface of the first horizontal inner support is flush with the top surfaces of the lattice columns.

The above prior art solutions have the following drawbacks: the foundation pit inner supporting structure comprises a cast-in-situ bored pile, lattice columns arranged in the cast-in-situ bored pile, supporting piles attached to the wall of the foundation pit, palm plate belts arranged on the supporting piles at intervals, a first horizontal inner support, a second horizontal inner support, corner supports and a protective surface layer. The structure of the foundation pit inner supporting structure is complex, and time and labor are wasted in the installation and disassembly processes.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a supporting structure in foundation ditch has labour saving and time saving's advantage at the in-process of installation with the dismantlement.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a foundation pit inner supporting structure comprises a first supporting structure and a second supporting structure, wherein the first supporting structure is made of cast-in-place reinforced concrete, the first supporting structure comprises first enclosing purlins fixedly arranged above two opposite wall bodies of a foundation pit and a plurality of first supporting rods fixedly arranged between the two first enclosing purlins; the second supporting structure is of a steel structure and comprises two second enclosing purlins fixedly arranged on the two opposite wall bodies of the foundation pit, and a second supporting rod fixedly arranged between the two second enclosing purlins of the foundation pit, wherein the second supporting rod is provided with a plurality of parts.

By adopting the technical scheme, the first support structure is made of cast-in-place reinforced concrete, so that on one hand, the cast-in-place reinforced concrete has high rigidity, small deformation and strong safety and reliability, and is convenient for firmly supporting the upper part of the foundation pit; on the other hand, the cast-in-place reinforced concrete supporting structure needs to be dismantled at last, so that the chiseling on the surface layer is convenient, and time and labor are saved; the second supporting structure is a steel structure, the steel structure has light dead weight, high construction speed, convenient assembly and disassembly and low cost; compared with a concrete structure, the available space of the foundation pit is larger; meanwhile, the steel structure can be recycled.

The present invention may be further configured in a preferred embodiment as: and two adjacent first supporting rods are fixedly provided with connecting rods, and the connecting rods are fixed with the first supporting rods through concrete pouring.

Through adopting above-mentioned technical scheme, the connecting rod has increased the fastness that first bearing structure connects.

The present invention may be further configured in a preferred embodiment as: a first reinforcing plate is arranged between the first supporting rod and the first enclosing purlin; and a reinforcing rod is arranged between the second supporting rod and the second enclosing purlin.

By adopting the technical scheme, the first reinforcing plate, the first supporting rod and the first enclosing purlin form a triangular structure, the triangular structure has the advantage of stability, and the first reinforcing plate increases the stability of connection of the first supporting rod and the first enclosing purlin; the reinforcing rod, the second supporting rod and the second enclosing purlin form a triangular structure, and the reinforcing rod increases the stability of the second supporting rod and the second enclosing purlin in connection.

The present invention may be further configured in a preferred embodiment as: and reinforcing ribs are fixedly arranged between the end parts of the second supporting rods and the second enclosing purlin.

Through adopting above-mentioned technical scheme, the strengthening rib has further increased the fastness of being connected between second bracing piece and the second purlin of enclosing.

The present invention may be further configured in a preferred embodiment as: the first purlin and the side wall of the foundation pit are fixed through a first anchor rod, one end of the first anchor rod penetrates through the first purlin and is anchored in the wall of the foundation pit, and the other end of the first anchor rod is in threaded connection with a first nut; the second enclosing purlin and the side wall of the foundation pit are fixed through a second anchor rod, one end of the second anchor rod penetrates through the second enclosing purlin and is anchored in the wall body of the foundation pit, and the other end of the second anchor rod is in threaded connection with a second nut.

By adopting the technical scheme, the first enclosing purlin is fixed on the foundation pit wall through the first anchor rod, so that the firmness of connection between the first enclosing purlin and the foundation pit wall is improved; enclose the purlin with the second through the second stock and be fixed in the foundation ditch wall body, increased the second and enclosed purlin and foundation ditch wall connection's fastness.

The present invention may be further configured in a preferred embodiment as: a first cushion plate is arranged between the first anchor rod and the first enclosing purlin; and a second cushion plate is arranged between the second anchor rod and the second surrounding purlin.

By adopting the technical scheme, the first cushion plate increases the contact area between the first nut and the first enclosing purlin and increases the fixing effect of the first nut on the first enclosing purlin; the second backing plate increases the contact area between the second nut and the second enclosing purlin and increases the fixing effect of the second nut on the second enclosing purlin.

The present invention may be further configured in a preferred embodiment as: a third enclosing purlin and a fourth enclosing purlin are fixedly arranged on the other two opposite wall bodies of the foundation pit, and two ends of the third enclosing purlin are fixedly connected with the opposite side walls of the two first enclosing purlins respectively; and two ends of the fourth enclosing purlin are fixedly connected with the opposite side walls of the two second enclosing purlins respectively.

Through adopting above-mentioned technical scheme, the fastness of first enclosing purlin and third enclosing purlin installation has been increased.

The present invention may be further configured in a preferred embodiment as: a second reinforcing plate is fixedly arranged between the first enclosing purlin and the third enclosing purlin; and a third reinforcing plate is fixedly arranged between the second enclosing purlin and the fourth enclosing purlin.

By adopting the technical scheme, the first enclosing purlin, the third enclosing purlin and the second reinforcing plate form a triangular structure, the triangular structure has the advantage of stability, and the second reinforcing plate increases the firmness of connection between the first enclosing purlin and the third enclosing purlin; the second encloses purlin, fourth and encloses the triangular structure of purlin and third reinforcing plate constitution, and the third reinforcing plate has increased the second and has enclosed the fastness of being connected between purlin and the fourth.

To sum up, the utility model discloses a following at least one useful technological effect:

1. on one hand, the cast-in-place reinforced concrete has high rigidity, and is convenient for firmly supporting the upper part of the foundation pit; on the other hand, the cast-in-place reinforced concrete supporting structure needs to be dismantled at last, so that the chiseling on the surface layer is convenient, and time and labor are saved; the steel structure has light dead weight, high construction speed, convenient assembly and disassembly and low cost;

2. the first reinforcing plate increases the connection stability of the first supporting rod and the first enclosing purlin; the reinforcing rods increase the connection stability of the second supporting rods and the second enclosing purlin;

3. the first base plate increases the fixing effect of the first nut on the first enclosing purlin; the second backing plate increases the fixing effect of the second nut on the second purlin.

Drawings

Fig. 1 is a schematic structural diagram of an inner supporting structure of a foundation pit according to an embodiment of the present invention;

FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;

fig. 3 is a partially enlarged schematic view of a portion B in fig. 1.

In the figure, 1, a first enclosing purlin; 2. a first anchor rod; 3. a first backing plate; 4. a first nut; 5. a third purlin; 6. a third anchor rod; 7. a third base plate; 8. a second reinforcing plate; 9. a first support bar; 10. a first reinforcing plate; 11. a connecting rod; 12. a second purlin; 13. a second anchor rod; 14. a second backing plate; 15. a second nut; 16. a fourth purlin; 17. a fourth anchor rod; 18. a fourth base plate; 19. a fourth nut; 20. a second support bar; 21. a reinforcing bar; 22. reinforcing ribs; 23. a third reinforcing plate; 24. and a third nut.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a supporting structure in foundation ditch, including first bearing structure, first bearing structure's material is cast in situ reinforced concrete. The first supporting structure comprises a first enclosing purlin 1 fixedly arranged on the opposite wall bodies of the two foundation pits. The shape of first purlin 1 that encloses is the cuboid, and the length direction of first purlin 1 that encloses is the same with the length direction of foundation ditch, and the upper surface of first purlin 1 that encloses flushes with the upper surface at foundation ditch edge. The first purlin 1 and the foundation pit wall are fixed through a plurality of first anchor rods 2. Specifically, be provided with first backing plate 3 between first stock 2 and the first purlin 1 of enclosing, first backing plate 3 and the first purlin 1 of enclosing are passed in proper order and the anchor is in the foundation ditch wall body to the one end of first stock 2, and the other end threaded connection of first stock 2 has first nut 4. So set up, through the lateral wall that a plurality of first nut 4 is fixed in the foundation ditch edge with first purlin 1 that encloses, increased the fastness of first purlin 1 installation of enclosing.

Referring to fig. 1 and 2, the other two opposite side walls of the foundation pit are fixedly provided with third enclosing purlins 5, and the third enclosing purlins 5 are also made of cast-in-place reinforced concrete. Purlin 5 is enclosed to the third shape is the cuboid, the length direction that purlin 5 is enclosed to the third is the same with the width direction of foundation ditch, the upper surface that purlin 5 is enclosed to the third flushes with the first upper surface that encloses purlin 1, purlin 5 is enclosed to the third and the foundation ditch wall body is fixed through third stock 6, be provided with third backing plate 7 between purlin 5 is enclosed to third stock 6 and the third, third backing plate 7 and third are enclosed to the third and the purlin 5 is enclosed in proper order to the one end of third stock 6 and the anchor is on the foundation ditch wall body, the other end threaded connection of third stock 6 has third nut 24. And two ends of the third enclosing purlin 5 are fixed with the side walls opposite to the two first enclosing purlins 1 through concrete pouring. So set up, further increased the fastness of first purlin 1 installation of enclosing.

Referring to fig. 1 and 2, a second reinforcing plate 8 is fixedly arranged between the first enclosing purlin 1 and the third enclosing purlin 5, one end of the second reinforcing plate 8 is fixed with the side wall of the first enclosing purlin 1 through concrete pouring, and the other end of the second reinforcing plate 8 is fixed with the side wall of the third enclosing purlin 5 through concrete pouring. So set up, second reinforcing plate 8, first purlin 1 and the third of enclosing enclose 5 purlins of purlin and constitute the triangle-shaped structure, and the triangle-shaped structure has the advantage of stabilizing the support, has increased the first fastness of enclosing 1 and the third purlin 5 installation of enclosing.

Referring to fig. 1, the first supporting structure further includes a first supporting rod 9 fixedly disposed between the two first purlins 1, and the first supporting rod 9 has a plurality of. In this embodiment, first bracing piece 9 is two, and two first bracing pieces 9 are parallel to each other, and two first bracing pieces 9 all enclose purlin 1 mutually perpendicular with first. The shape of first bracing piece 9 is the cuboid, and the both ends of first bracing piece 9 are fixed through concrete placement with two first purlin 1 relative lateral walls respectively.

Referring to fig. 1, two first reinforcing plates 10 are fixedly arranged between each end of the first supporting rod 9 and the first surrounding purlin 1, and the two first reinforcing plates 10 are symmetrically distributed on two sides of the first supporting rod 9. One end of the first reinforcing plate 10 is fixed with the side wall of the first supporting rod 9 through concrete pouring, and the other end of the first reinforcing plate 10 is fixed with the side wall of the first purlin 1 through concrete pouring. So set up, first reinforcing plate 10, first bracing piece 9 and first purlin 1 of enclosing constitute the triangle-shaped structure, and the triangle-shaped structure has the advantage of stability, and first reinforcing plate 10 has increased first bracing piece 9 and the first stability of being connected of purlin 1 of enclosing.

Referring to fig. 1, a connecting rod 11 is fixedly arranged between the two first supporting rods 9, and two ends of the connecting rod 11 are respectively fixed to the side walls of the two first supporting rods 9 through concrete pouring. By the arrangement, the cast-in-place reinforced concrete has high rigidity, small deformation and strong safety and reliability, and the first support structure is convenient for firmly supporting the upper part of the foundation pit; on the other hand, the cast-in-place reinforced concrete supporting structure needs to be dismantled at last, and the chiseling on the surface layer is convenient.

Referring to fig. 1 and 2, the support structure in the foundation pit further includes a second support structure, the second support structure is a steel structure, and the second support structure is located below the first support structure. The second bearing structure encloses purlin 12 including the fixed second that sets up in two relative wall body abdomens of foundation ditch. The second encloses the shape of purlin 12 and is the cuboid, and the length direction of second enclosing purlin 12 is the same with the width direction of foundation ditch. The second purlin 12 and the foundation pit wall are fixed through a plurality of second anchor rods 13. Specifically, a second cushion plate 14 is arranged between the second anchor rod 13 and the second purlin 12, one end of the second anchor rod 13 sequentially penetrates through the second cushion plate 14 and the second purlin 12 and is anchored in the wall of the foundation pit, and the other end of the second anchor rod 13 is in threaded connection with a second nut 15. So set up, enclose purlin 12 through a plurality of second nut 15 with the second and be fixed in the lateral wall at foundation ditch edge, increased the second and enclosed the fastness of purlin 12 installation.

Referring to fig. 1 and 2, a fourth surrounding purlin 16 is fixedly arranged on the wall body of the foundation pit, the fourth surrounding purlin 16 is also of a steel structure, and the fourth surrounding purlin 16 is located below the third surrounding purlin 5. The shape of fourth purlin 16 is the cuboid, the length direction of fourth purlin 16 is the same with the width direction of foundation ditch, the upper surface of fourth purlin 16 flushes with the upper surface that the second encloses purlin 12, fourth purlin 16 is fixed through fourth stock 17 with the foundation ditch wall body, fourth stock 17 and fourth enclose and are provided with fourth backing plate 18 between purlin 16, fourth backing plate 18 and fourth purlin 16 are enclosed in proper order to the one end of fourth stock 17 and the anchor is in the foundation ditch wall body, the other end threaded connection of fourth stock 17 has fourth nut 19. And two ends of the fourth purlin 16 are respectively fixed with the opposite side walls of the two second purlins 12 by welding. So set up, further increased the fastness of second purlin 12 installation.

Referring to fig. 1 and 2, a third reinforcing plate 23 is fixedly arranged between the second purlin 12 and the fourth purlin 16, one end of the third reinforcing plate 23 is fixed to the side wall of the second purlin 12 through concrete pouring, and the other end of the third reinforcing plate 23 is fixed to the side wall of the fourth purlin 16 through concrete pouring. So set up, third reinforcing plate 23, second enclose purlin 12 and fourth and enclose purlin 16 and constitute the triangle-shaped structure, and the triangle-shaped structure has the advantage of stabilizing the support, has increased the second and has enclosed the fastness that purlin 12 and fourth enclosed purlin 16 installed.

Referring to fig. 1, the second supporting structure further includes a plurality of second supporting rods 20 welded between the two second purlins 12. In this embodiment, there are two second support bars 20, two second support bars 20 are parallel to each other, and both the two second support bars 20 are perpendicular to the second purlin 12. The second support rod 20 is in a cylinder shape, and two ends of the second support rod 20 are respectively welded to the opposite side walls of the two second purlins 12.

Referring to fig. 1 and 3, two reinforcing rods 21 are fixedly arranged between each end of the second supporting rod 20 and the second purlin 12, one end of each reinforcing rod 21 is welded to the side wall of the second purlin 12, and the other end of each reinforcing rod 21 is welded to the side wall of the second supporting rod 20. Stiffener 21, second bracing piece 20 enclose purlin 12 with the second and constitute the triangle-shaped structure, and the triangle-shaped structure has the advantage of stability, and stiffener 21 has increased the stability that second bracing piece 20 and second enclose purlin 12 and be connected. Reinforcing ribs 22 are welded between the two opposite side walls at each end of the second support rod 20 and the second enclosing purlin 12, and the firmness of connection between the second support rod 20 and the second enclosing purlin 12 is further increased by the reinforcing ribs 22.

The implementation principle of the embodiment is as follows: firstly, the first enclosing purlin 1 is fixed on two opposite side walls in the length direction of the foundation pit by using a first anchor rod 2 and a first nut 4, and then a first supporting rod 9 and a first reinforcing plate 10 are fixed between the two first enclosing purlins 1 by a concrete pouring fixing mode, so that the top of the foundation pit is fixed. The cast-in-place reinforced concrete has high rigidity, small deformation and strong safety and reliability, and is convenient for firmly supporting the upper part of the foundation pit; on the other hand, cast-in-place reinforced concrete bearing structure all needs to demolish at last, and it is comparatively convenient, labour saving and time saving to chisel at the surface course. When the foundation ditch excavates certain degree of depth, reuse second stock 13 and second nut 15 enclose purlin 12 with the second and be fixed in the first below of enclosing purlin 1, then enclose between the purlin 12 with two seconds through the welded mode with second bracing piece 20 is fixed in, then enclose the both sides of purlin 20 with the strengthening rib 22 through the welded mode, are fixed in the both sides of second bracing piece 20 with stiffener 21 through the welded mode at last. The steel structure has light dead weight, high construction speed, convenient assembly and disassembly and low cost; compared with a concrete structure, the available space of the foundation pit is larger; meanwhile, the steel structure can be recycled.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a bearing structure in foundation ditch which characterized in that: the support structure comprises a first support structure and a second support structure, wherein the first support structure is made of cast-in-place reinforced concrete, the first support structure comprises first enclosing purlins (1) fixedly arranged above two opposite wall bodies of a foundation pit and first support rods (9) fixedly arranged between the two first enclosing purlins (1), and the number of the first support rods (9) is multiple; the second bearing structure is a steel structure, the second bearing structure comprises second enclosing purlins (12) fixedly arranged on the two opposite wall bodies of the foundation pit, and second supporting rods (20) fixedly arranged between the two second enclosing purlins (12) of the foundation pit, and the second supporting rods (20) are provided with a plurality of.

2. An excavation internal support structure as defined in claim 1, wherein: and a connecting rod (11) is fixedly arranged between every two adjacent first supporting rods (9), and the connecting rod (11) is fixed with the first supporting rods (9) through concrete pouring.

3. An excavation internal support structure as defined in claim 1, wherein: a first reinforcing plate (10) is arranged between the first supporting rod (9) and the first surrounding purlin (1); and a reinforcing rod (21) is arranged between the second supporting rod (20) and the second surrounding purlin (12).

4. An excavation internal support structure as defined in claim 1, wherein: and reinforcing ribs (22) are fixedly arranged between the end parts of the second support rods (20) and the second purlin (12).

5. An excavation internal support structure as defined in claim 1, wherein: the first enclosing purlin (1) and the side wall of the foundation pit are fixed through a first anchor rod (2), one end of the first anchor rod (2) penetrates through the first enclosing purlin (1) and is anchored in the wall of the foundation pit, and the other end of the first anchor rod (2) is in threaded connection with a first nut (4); the second enclosing purlin (12) and the side wall of the foundation pit are fixed through a second anchor rod (13), one end of the second anchor rod (13) penetrates through the second enclosing purlin (12) and is anchored in the wall of the foundation pit, and the other end of the second anchor rod (13) is in threaded connection with a second nut (15).

6. An excavation internal support structure according to claim 5, wherein: a first cushion plate (3) is arranged between the first anchor rod (2) and the first surrounding purlin (1); and a second cushion plate (14) is arranged between the second anchor rod (13) and the second surrounding purlin (12).

7. An excavation internal support structure as defined in claim 1, wherein: a third enclosing purlin (5) and a fourth enclosing purlin (16) are fixedly arranged on the other two opposite walls of the foundation pit, and two ends of the third enclosing purlin (5) are fixedly connected with the opposite side walls of the two first enclosing purlins (1) respectively; and two ends of the fourth enclosing purlin (16) are respectively fixedly connected with the opposite side walls of the two second enclosing purlins (12).

8. An excavation internal support structure according to claim 7, wherein: a second reinforcing plate (8) is fixedly arranged between the first enclosing purlin (1) and the third enclosing purlin (5); and a third reinforcing plate (23) is fixedly arranged between the second enclosing purlin (12) and the fourth enclosing purlin (16).