CN211036997U - Supporting structure and supporting system - Google Patents

Abstract

The utility model provides a supporting construction and supporting system, wherein, supporting construction includes first sheet pile structure, second sheet pile structure, third sheet pile structure, pile top support subassembly and shutoff structure, first sheet pile structure set up in the first side of linkage segment, second sheet pile structure set up in the second side of linkage segment, third sheet pile structure set up in the third side of linkage segment, pile top support subassembly set up in the top of linkage segment, first sheet pile structure second sheet pile structure and third sheet pile structure three respectively with subassembly fixed connection is supported on the pile top, shutoff structure fixed connection in second sheet pile is structural and be located the below of basis tie beam, with right the bottom space of basis tie beam carries out the shutoff. The utility model discloses a supporting construction can avoid the original structure of existing building to receive destruction, can guarantee the excavation supporting security again.

Description

Support structure and support system

technical field

The invention relates to the technical field of construction engineering, in particular to a support structure and a support system.

Background technique

Most of the existing foundation pits are caused by the construction of new underground spaces in buildings. With the increase of urban renovation projects, projects of new underground space for existing buildings have begun to appear, and the foundation beams in the original structure of existing buildings are more likely to affect the support of new foundation pits. Especially in the construction of new foundation pits indoors and outdoors in existing buildings, there will be curtain wall foundation beams and steel structure foundation beams at the connection section between the indoor new foundation pits and the outdoor new foundation pits of existing buildings. When the foundation pit is constructed by excavating the earthwork inside and outside of the building, it is easy to cause damage to the original structures such as the curtain wall foundation beam and the steel structure foundation connecting beam of the new foundation pit connection between the indoor and outdoor buildings of the existing building. It is rare for newly built foundation pits to pass through the foundation beams. In this case, there is a lack of a support structure that can ensure that the original structure is not damaged and ensure the support safety of the new foundation pits inside and outside the existing buildings. .

Therefore, there is an urgent need for a support structure and a support system that can not only damage the original structure of the existing building, but also ensure the safety of foundation pit support.

SUMMARY OF THE INVENTION

The first object of the present invention is to provide a support structure that can avoid damage to the original structure of an existing building and ensure the safety of foundation pit support.

The second object of the present invention is to provide a support system that can avoid damage to the original structure of the existing building and can ensure the safety of foundation pit support.

In order to achieve the above-mentioned first purpose, the present invention provides a support structure for supporting the connecting section, foundation beam and foundation connecting beam between newly built foundation pits inside and outside the building, and the connecting section has a first section. A side surface, a second side surface and a third side surface, the second side surface is connected between the first side surface and the third side surface, the base connecting beam passes through the second side surface, the support The protective structure includes a first sheet pile structure, a second sheet pile structure, a third sheet pile structure, a pile top support component and a plugging structure, and the first sheet pile structure is arranged on the first side of the connecting section, so The second sheet pile structure is arranged on the second side of the connecting section, the third sheet pile structure is arranged on the third side of the connecting section, and the pile top supporting component is arranged on the top of the connecting section , the first sheet pile structure, the second sheet pile structure and the third sheet pile structure are respectively fixedly connected to the pile top support assembly, and the blocking structure is fixedly connected to the second sheet pile structure. The sheet pile is structurally located below the foundation tie beam, so as to block the space under the foundation tie beam.

Compared with the prior art, in the support structure of the present invention, the first sheet pile structure, the second sheet pile structure and the third sheet pile structure are correspondingly arranged on the exposed first side, the second side and the third side of the connecting section. To resist the earth pressure in the horizontal direction, the first sheet pile structure, the second sheet pile structure and the third sheet pile structure are fixed and positioned through the pile top support component, and the top of the support connection section can be fixed and positioned. The edge support seat is used to ensure the support safety of the soil body in the connection section, and the space under the foundation tie beam is blocked by setting a blocking structure under the foundation tie beam to avoid the foundation tie beam. The earthwork underneath is excavated, causing the earthwork on the second side of the connecting section to collapse, thereby avoiding damage to the original structure of the existing building. Therefore, the support structure of the present invention can avoid damage to the original structure of the existing building, and can also ensure the safety of foundation pit support; in addition, the first sheet pile structure, the second sheet pile structure, the third sheet pile structure, The pile top support components and the plugging structure can be constructed by prefabricated construction, which is simple and convenient to construct, and the construction speed is fast, which greatly reduces the construction cost and construction period of such foundation pits, has good economic and social benefits, and can be recycled. It is good to practice the concept of green environmental protection.

Preferably, the first sheet pile structure includes a plurality of first steel sheet piles, each of the first steel sheet piles is vertically disposed on the first side surface, and the first steel sheet piles are connected in sequence.

Preferably, the second sheet pile structure includes a plurality of second steel sheet piles, each of the second steel sheet piles is vertically disposed on the second side surface, and each of the second steel sheet piles is connected in sequence.

Preferably, the third sheet pile structure includes a plurality of third steel sheet piles, each of the third steel sheet piles is vertically arranged on the third side surface, and the third steel sheet piles are connected in sequence.

Preferably, the pile top support assembly includes a first connecting beam, a second connecting beam and a purlin, the first connecting beam is fixedly connected with the first sheet pile structure, and the first connecting beam is along the The top edge of the first side is arranged, the second connecting beam is fixedly connected to the third sheet pile structure, the second connecting beam is arranged along the top edge of the third side, and the purlin is connected to the The second sheet pile structure is fixedly connected, and the purlin is arranged along the top edge of the second side surface.

Preferably, the pile top support assembly further includes a plurality of pairs of tie rods, and each pair of tie rods is respectively connected between the first connecting beam and the second connecting beam.

Preferably, the pairs of tie rods are arranged at equal intervals.

Preferably, the blocking structure includes a plurality of blocking members, the blocking members are closely connected in sequence along the upper and lower directions and are located below the basic connecting beam, and the two ends of the blocking members are They are respectively fixedly connected with the second sheet pile structure.

Preferably, the blocking member located at the top is closely attached to the bottom of the base connecting beam.

In order to achieve the above second object, the present invention provides a support system, comprising a pair of supports and the above-mentioned support structure, the number of the support structures is two, and the pair of supports is connected to the two piles. between the top support components.

Compared with the prior art, the support system of the present invention connects the two support structures through the support members, so as to support the two opposite connection sections between the new foundation pits inside and outside the existing building. Structure The first sheet pile structure, the second sheet pile structure and the third sheet pile structure are correspondingly arranged on the exposed first side, the second side and the third side of the connecting section to resist the earth pressure in the horizontal direction, and then pass The pile top support assembly fixes and positions the first sheet pile structure, the second sheet pile structure and the third sheet pile structure, and at the same time can support the seat on the top outer edge of the support connection section, so as to ensure the soil mass of the connection section. The space under the foundation tie beam is blocked by setting up a blocking structure under the foundation tie beam to avoid the excavation of the earth under the foundation tie beam, which may lead to the first failure of the connection section. The earthwork on the two sides collapsed, thereby avoiding damage to the original structure of the existing building. Therefore, the support system of the present invention can avoid damage to the original structure of the existing building, and can also ensure the safety of foundation pit support; in addition, the first sheet pile structure, the second sheet pile structure, the third sheet pile structure, The pile top support components and the plugging structure can be constructed by prefabricated construction, which is simple and convenient to construct, and the construction speed is fast, which greatly reduces the construction cost and construction period of such foundation pits, has good economic and social benefits, and can be recycled. It is good to practice the concept of green environmental protection.

Preferably, the pair of braces are I-beams or steel pipes.

Description of drawings

FIG. 1 is a schematic three-dimensional structure diagram of the support system of the present invention when supporting the connection section between the newly built foundation pits inside and outside the building.

FIG. 2 is a schematic three-dimensional structure diagram of the support structure of the present invention when one of the connecting sections is supported.

FIG. 3 is a schematic three-dimensional structural diagram of another angle when the support structure shown in FIG. 2 supports one of the connecting sections.

FIG. 4 is a schematic structural diagram of the pile top support assembly of the support structure of the present invention.

FIG. 5 is a schematic structural diagram of the plugging structure of the support structure of the present invention.

Detailed ways

In order to describe the technical content and structural features of the present invention in detail, further description will be given below with reference to the embodiments and the accompanying drawings.

Please refer to FIGS. 1 to 3 , the support system 200 of the present invention is used to support the connecting section 500, the foundation beam 600 and the foundation connecting beam 700 between the newly built foundation pits inside and outside the building, and the connecting section 500 has a first A side surface 501, a second side surface 502 and a third side surface 503. The second side surface 502 is connected between the first side surface 501 and the third side surface 503. The foundation connecting beam 700 passes through the second side surface 502. There are two connection sections 500 between the new indoor foundation pit 300 and the new outdoor foundation pit 400. The two connection sections 500 are arranged in opposite directions. space. The support system 200 includes a pair of supports 6 and a support structure 100. The number of support structures 100 is two, and the two support structures 100 support two connection sections 500 correspondingly. The support structure 100 includes a first sheet pile structure 1, The second sheet pile structure 2 , the third sheet pile structure 3 , the pile top support assembly 4 and the plugging structure 5 , the first sheet pile structure 1 is arranged on the first side 501 of the connecting section 500 , and the second sheet pile structure 2 is arranged On the second side 502 of the connecting section 500, the third sheet pile structure 3 is arranged on the third side 503 of the connecting section 500, the pile top supporting component 4 is arranged on the top of the connecting section 500, the first sheet pile structure 1, the second The sheet pile structure 2 and the third sheet pile structure 3 are respectively fixedly connected to the pile top support assembly 4, and the plugging structure 5 is fixedly connected to the second sheet pile structure 2 and is located under the foundation connecting beam 700 to prevent The space under the foundation tie beam 700 is blocked; the braces 6 are connected between the two pile top support assemblies 4, and the number of braces 6 can be provided in multiples to ensure the connection stability of the two support structures 100 , so as to ensure the stability of the support system 200. Specifically, the supporting member 6 can be an I-beam or a steel pipe. Wherein, the above-mentioned fixed connection method may adopt the method of welding, but is not limited to this, and may also adopt the method of bolting and the like. More specific as follows:

Please refer to FIG. 2 and FIG. 3 , in this embodiment, the first sheet pile structure 1 includes a plurality of first steel sheet piles 11 , each first steel sheet pile 11 is vertically disposed on the first side 501 , and each first steel sheet pile 11 is vertically disposed on the first side surface 501 . The piles 11 are connected in sequence; the second sheet pile structure 2 includes a plurality of second steel sheet piles 21 , each second steel sheet pile 21 is vertically arranged on the second side 502 , and each second steel sheet pile 21 is connected in sequence; the third The sheet pile structure 3 includes a plurality of third steel sheet piles 31 , and each third steel sheet pile 31 is vertically disposed on the third side surface 503 , and the third steel sheet piles 31 are connected in sequence. The first steel sheet pile 11 , the second steel sheet pile 21 and the third steel sheet pile 31 may adopt the existing Larsen steel sheet piles, but are not limited thereto. It should be noted that, in other embodiments, the first sheet pile structure 1 , the second sheet pile structure 2 and the third sheet pile structure 3 may also use other sheet piles, such as wood piles and the like.

Please refer to FIG. 2 and FIG. 4 , the pile top support assembly 4 includes a first connecting beam 41 , a second connecting beam 42 and a purlin 43 . The first connecting beam 41 is fixedly connected with the first sheet pile structure 1 , and the first connecting beam 41 is arranged along the top edge of the first side 501, the second connecting beam 42 is fixedly connected to the third sheet pile structure 3, the second connecting beam 42 is arranged along the top edge of the third side 503, and the purlin 43 is connected to the second sheet pile structure 2. Fixed connection, the purlin 43 is arranged along the top edge of the second side surface 502, and the purlin 43 can play the role of fixing the second sheet pile structure 2 and transferring the load. Specifically, the first coupling beam 41 and the second coupling beam 42 may be channel steel coupling beams, and the purlin 43 may be existing HW-shaped steel, but not limited thereto. Further, the pile top support assembly 4 also includes a plurality of pairs of tie rods 44 , and each pair of tie rods 44 is respectively connected between the first connecting beam 41 and the second connecting beam 42 . By arranging the pair of tie rods 44 , the connection stability of the first connecting beam 41 , the second connecting beam 42 and the purlin 43 is improved. Specifically, each pair of tie rods 44 are arranged at equal intervals, so as to ensure the force balance. Wherein, the existing channel steel pairing rod can be used for the tie rod 44, but it is not limited to this; There are some ways of welding and fixing, but not limited to this.

Please refer to FIG. 2 and FIG. 5 , in this embodiment, the blocking structure 5 includes a plurality of blocking members 51 , and each blocking member 51 is closely connected in sequence along the upper and lower directions and is located below the basic connecting beam 700 , the two ends of the blocking member 51 are respectively fixedly connected with the second sheet pile structure 2 . The blocking member 51 is closely connected to the bottom of the foundation tie beam 700 in the upper and lower directions in turn, so as to block the space under the foundation tie beam 700 to prevent the earthwork under the foundation tie beam 700 from being opened. The earthwork on the second side surface 502 of the connection section 500 collapses due to the excavation, thereby avoiding damage to the original structure of the existing building. Specifically, the blocking member 51 located at the top is closely attached to the bottom of the basic connecting beam 700, and fully blocks all the space under the basic connecting beam 700, thereby further improving the safety.

Please refer to FIG. 1 to FIG. 5 , the method for supporting the connection section 500 of the existing building inside and outside the foundation pit of the present invention includes the following steps:

S1, provide a first sheet pile structure 1, a second sheet pile structure 2, a third sheet pile structure 3, a first coupling beam 41, a second coupling beam 42, a purlin 43 and a number of blocking members 51, and determine the existing For the positions of the foundation beam 600 and the foundation connecting beam 700 of the building, excavate the earthwork to a preset distance below the bottom surface of the foundation beam 600, and the preset distance should not exceed 20 cm. Install the guide frame at the line position, set the first sheet pile structure 1 on the first side 501 of the two connecting sections 500, set the second sheet pile structure 2 on the second side 502 of the two connecting sections 500, and set the third sheet pile structure on the second side 502 of the two connecting sections 500. 3 is arranged on the third side surface 503 of the two connecting sections 500;

S2, the first coupling beam 41 is fixedly connected with the first sheet pile structure 1, the first coupling beam 41 is set at the top edge position of the two first side surfaces 501, the second coupling beam 42 is connected with the third sheet pile structure 3. Fixed connection, and the second connecting beam 42 is arranged at the top edge position of the two third sides 503, the purlin 43 is fixedly connected with the second sheet pile structure 2, and the purlin 43 is arranged on the two second sides 502. At the top edge position, the pile top support assembly 4 for supporting the top of the connecting section 500 is formed; a through groove is excavated between the foundation beam 600 and the foundation connecting beam 700, and a plurality of pairs of tie rods 44 are passed through the through groove and are respectively connected between the first connecting beam 41 and the second connecting beam 42, and each pair of tie rods 44 are arranged at equal intervals;

S3, connect the brace 6 with the two surrounding purlins 43; clean up the earthwork at the top of the slope, and spray 100 mm thick plain concrete to protect the top of the slope;

S4, excavating earthwork in layers, the height of each layer shall not exceed 1 meter;

S5, after excavating to the bottom of the foundation tie beam 700, set one of the blocking pieces 51 under the foundation tie beam 700, and fix both ends of the blocking piece 51 to the second sheet pile structure 2 , to block the bottom space of the foundation connecting beam 700;

S6, as the earthwork continues to excavate, the remaining plugging members 51 are fixedly connected to the second sheet pile structure 2 from top to bottom, and the two adjacent plugging members 51 on the upper and lower sides are placed in close contact, so as to continue to compress the foundation. The bottom space of the tie beam 700 is blocked.

Wherein, in S5 and S6, the overlapping length between the blocking member 51 and the second sheet pile structure 2 is in the range of 200-300 mm.

To sum up, in the present invention, the first sheet pile structure 1 , the second sheet pile structure 2 and the third sheet pile structure 3 are correspondingly arranged on the exposed first side 501 , the second side 502 and the third side 503 of the connecting section 500 . , in order to resist the earth pressure in the horizontal direction, and then the first sheet pile structure 1, the second sheet pile structure 2, and the third sheet pile structure 3 are fixed and positioned through the pile top support component 4, and at the same time, the support connection section can be fixed and positioned. The outer edge of the top of the 500 supports the seat, so as to ensure the support safety of the soil body of the connection section 500, and by setting the blocking structure 5 under the foundation tie beam 700, the space under the foundation tie beam 700 is sealed. It can prevent the earthwork on the second side 502 of the connection section 500 from collapsing due to the earthwork under the foundation connecting beam 700 being excavated, thereby preventing the original structure of the existing building from being damaged. Therefore, the support structure 100 of the present invention can avoid damage to the original structure of the existing building, and can also ensure the safety of foundation pit support; in addition, the first sheet pile structure 1, the second sheet pile structure 2, the third sheet pile structure The pile structure 3, the pile top supporting component 4 and the plugging structure 5 can be constructed by prefabricated construction, the construction is simple and convenient, and the construction speed is fast, which greatly reduces the construction cost and construction period of such foundation pits, and has good economic and social benefits. It can be recycled and reused, and it is better to practice the concept of green environmental protection.

The above disclosures are only preferred examples of the present invention, and cannot be used to limit the scope of rights of the present invention. Therefore, the equivalent changes made according to the claims of the present invention all belong to the scope covered by the present invention.

Claims (11)

1. A supporting structure is used for supporting a connecting section, a foundation beam and a foundation connecting beam between newly-built foundation pits indoors and outdoors of a building, the connecting section is provided with a first side surface, a second side surface and a third side surface, the second side surface is connected between the first side surface and the third side surface, the foundation connecting beam is arranged on the second side surface in a penetrating way, the supporting structure is characterized by comprising a first sheet pile structure, a second sheet pile structure, a third sheet pile structure, a pile top supporting component and a plugging structure, the first sheet pile structure is arranged on the first side surface of the connecting section, the second sheet pile structure is arranged on the second side surface of the connecting section, the third sheet pile structure is arranged on the third side surface of the connecting section, the pile top supporting component is arranged on the top of the connecting section, and the first sheet pile structure, the second sheet pile structure and the third sheet pile structure are respectively and fixedly connected with the pile top supporting component, the blocking structure is fixedly connected to the second sheet pile structure and located below the foundation connecting beam so as to block the space below the foundation connecting beam.

2. The supporting structure of claim 1, wherein the first sheet pile structure comprises a plurality of first steel sheet piles, each first steel sheet pile is vertically arranged on the first side face, and the first steel sheet piles are connected in sequence.

3. The supporting structure of claim 1, wherein the second sheet pile structure comprises a plurality of second steel sheet piles, each second steel sheet pile is vertically arranged on the second side face, and the second steel sheet piles are connected in sequence.

4. The supporting structure of claim 1, wherein the third sheet pile structure comprises a plurality of third sheet piles, each third sheet pile is vertically arranged on the third side surface, and the third sheet piles are connected in sequence.

5. The supporting structure of claim 1, wherein the pile top supporting assembly comprises a first connecting beam, a second connecting beam and a surrounding purlin, the first connecting beam is fixedly connected with the first sheet pile structure, the first connecting beam is arranged along the top edge of the first side surface, the second connecting beam is fixedly connected with the third sheet pile structure, the second connecting beam is arranged along the top edge of the third side surface, the surrounding purlin is fixedly connected with the second sheet pile structure, and the surrounding purlin is arranged along the top edge of the second side surface.

6. The support structure of claim 5, wherein the pile top support assembly further comprises a plurality of tie-rods, each tie-rod being connected between the first and second connecting beams.

7. The support structure of claim 6, wherein each of the tie-rods is equally spaced.

8. The supporting structure according to claim 1, wherein the blocking structure comprises a plurality of blocking pieces, the blocking pieces are sequentially and tightly connected along the upper direction and the lower direction and are positioned below the foundation connecting beam, and two ends of each blocking piece are fixedly connected with the second sheet pile structures respectively.

9. The support structure of claim 8, wherein the top closure is affixed to the bottom of the foundation tie beam.

10. A support system including two counter-bracing members and a support structure according to any one of claims 1 to 9, the counter-bracing members being connected between two of said pile top support assemblies.

11. The support system of claim 10, wherein the counter-stay is an i-steel or steel tube.

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