CN110512617B - Supporting structure, supporting system and supporting method for connecting sections of foundation pits inside and outside existing building - Google Patents
Supporting structure, supporting system and supporting method for connecting sections of foundation pits inside and outside existing building Download PDFInfo
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- CN110512617B CN110512617B CN201910831471.XA CN201910831471A CN110512617B CN 110512617 B CN110512617 B CN 110512617B CN 201910831471 A CN201910831471 A CN 201910831471A CN 110512617 B CN110512617 B CN 110512617B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000000903 blocking effect Effects 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 238000009412 basement excavation Methods 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 description 20
- 239000002689 soil Substances 0.000 description 11
- 238000004064 recycling Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
- E02D5/06—Fitted piles or other elements specially adapted for closing gaps between two sheet piles or between two walls of sheet piles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention provides a supporting structure, a supporting system and a supporting method for an existing building inner and outer foundation pit connecting section, wherein the supporting structure comprises a first sheet pile structure, a second sheet pile structure, a third sheet pile structure, a pile top supporting component and a blocking structure, the first sheet pile structure is arranged on a first side surface of the connecting section, the second sheet pile structure is arranged on a second side surface of the connecting section, the third sheet pile structure is arranged on a third side surface of the connecting section, 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 fixedly connected with the pile top supporting component respectively, and the blocking structure is fixedly connected to the second sheet pile structure and is positioned below a foundation connecting beam so as to block a space below the foundation connecting beam. The supporting structure can avoid the original structure of the existing building from being damaged, and can ensure the safety of foundation pit supporting.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a supporting structure, a supporting system and a supporting method for an inner foundation pit and an outer foundation pit connecting section of an existing building.
Background
Most of the existing foundation pits are generated by the construction of new underground spaces of buildings. With the increase of urban reconstruction engineering, projects of newly built underground spaces of existing buildings begin to appear, and foundation beams in the original structures of the existing buildings are easy to influence the support of newly built foundation pits. Especially in the construction engineering of the indoor and outdoor newly-built foundation pit of existing building, there are curtain wall foundation beams and steel structure foundation connecting beams at the junction between the indoor newly-built foundation pit of existing building and the outdoor newly-built foundation pit, when the foundation pit is built by the indoor and outdoor open earthwork of existing building, the original structures such as curtain wall foundation beams and steel structure foundation connecting beams of the indoor and outdoor newly-built foundation pit connecting sections of existing building are easily damaged, the condition that the foundation beams are penetrated by the indoor and outdoor newly-built foundation pit of existing building is less in the existing engineering, and under the condition, a supporting structure capable of guaranteeing the original structure is not damaged and guaranteeing the supporting safety of the indoor and outdoor newly-built foundation pit of existing building is lacking.
Therefore, there is an urgent need for a supporting structure, a supporting system and a supporting method for the connecting sections of the foundation pit inside and outside the existing building, which can not destroy the original structure of the existing building and can ensure the supporting safety of the foundation pit.
Disclosure of Invention
The first object of the present invention is to provide a supporting structure which can prevent the original structure of the existing building from being damaged and ensure the safety of the foundation pit supporting.
The second object of the present invention is to provide a supporting system which can prevent the original structure of the existing building from being damaged and ensure the safety of the foundation pit supporting.
The third object of the invention is to provide a supporting method for the connecting sections of the inner foundation pit and the outer foundation pit of the existing building, which is used for avoiding the original structure of the existing building from being damaged and ensuring the supporting safety of the foundation pit.
In order to achieve the first object, the present invention provides a supporting structure, which is used for supporting a connection section, a foundation beam and a foundation connecting beam between an indoor foundation pit and an outdoor foundation pit of a building, wherein the connection section is provided with a first side, a second side and a third side, the second side is connected between the first side and the third side, the foundation connecting beam is arranged on the second side in a penetrating manner, the supporting structure comprises 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 of the connection section, the second sheet pile structure is arranged on the second side of the connection section, the third sheet pile structure is arranged on the third side of the connection section, the pile top supporting component is arranged on the top of the connection section, the first sheet pile structure, the second sheet pile structure and the third sheet pile structure are respectively fixedly connected with the pile top supporting component, the second sheet pile structure and the third sheet pile structure are fixedly connected to the foundation connecting beam below the foundation connecting beam, and the pile top is fixedly connected to the foundation connecting beam below the plugging structure.
Compared with the prior art, the supporting structure has the advantages that the first sheet pile structure, the second sheet pile structure and the third sheet pile structure are correspondingly arranged on the first side face, the second side face and the third side face of the connecting section exposed to the outside so as to resist the soil pressure in the horizontal direction, the first sheet pile structure, the second sheet pile structure and the third sheet pile structure are fixedly positioned through the pile top supporting component, and meanwhile, the supporting seat can be arranged on the outer edge of the top of the supporting connecting section, so that the supporting safety of a soil body of the connecting section is ensured, and the space below the foundation connecting beam is blocked by arranging the blocking structure below the foundation connecting beam, so that the earthwork of the second side face of the connecting section is prevented from collapsing due to the fact that the earthwork below the foundation connecting beam is excavated, and the original structure of the existing building is prevented from being damaged. Therefore, the supporting structure can avoid the original structure of the existing building from being damaged, and can ensure the safety of foundation pit supporting; in addition, the first sheet pile structure, the second sheet pile structure, the third sheet pile structure, the pile top supporting component and the plugging structure can be constructed in an assembled mode, construction is simple and convenient, construction speed is high, construction cost and construction period of the foundation pit are greatly reduced, better economic and social benefits are achieved, recycling is achieved, and the idea of green environmental protection is better to trample.
Preferably, 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 each first steel sheet pile is connected in sequence.
Preferably, 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 each second steel sheet pile is connected in sequence.
Preferably, the third sheet pile structure comprises a plurality of third steel sheet piles, each third steel sheet pile is vertically arranged on the third side face, and each third steel sheet pile is connected in sequence.
Preferably, the pile top supporting component comprises a first connecting beam, a second connecting beam and an enclosing purlin, wherein 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 enclosing purlin is fixedly connected with the second sheet pile structure, and the enclosing purlin is arranged along the top edge of the second side surface.
Preferably, the pile top supporting assembly further comprises a plurality of pairs of pull rods, and each pair of pull rods is connected between the first connecting beam and the second connecting beam respectively.
Preferably, the pair of pull rods are arranged at equal intervals.
Preferably, the plugging structure comprises a plurality of plugging pieces, the plugging pieces are sequentially and closely connected along the upper direction and the lower direction and positioned below the foundation connecting beam, and two ends of the plugging pieces are fixedly connected with the second sheet pile structure respectively.
Preferably, the plugging piece at the top is tightly attached to the bottom of the foundation tie beam.
In order to achieve the second objective, the present invention provides a supporting system, which comprises a pair of supporting members and the supporting structures, wherein the number of the supporting structures is two, and the pair of supporting members are connected between two pile top supporting components.
Compared with the prior art, the supporting system has the advantages that the two supporting structures are connected through the supporting piece, so that two opposite connecting sections between the indoor foundation pit and the outdoor foundation pit of the existing building are supported, the supporting structure is correspondingly arranged on the first side face, the second side face and the third side face of the connecting section exposed outside through the first sheet pile structure, the second sheet pile structure and the third sheet pile structure, so that the soil pressure in the horizontal direction is resisted, the first sheet pile structure, the second sheet pile structure and the third sheet pile structure are fixedly positioned through the pile top supporting component, and meanwhile, the supporting seat can be arranged on the top outer edge of the supporting connecting section, so that the supporting safety of a soil body of the connecting section is guaranteed, and the space below the foundation tie beam is blocked through the arrangement of the blocking structure below the foundation tie beam, so that the soil below of the second side face of the connecting section is excavated, and the original structure of the existing building is prevented from being damaged. Therefore, the supporting system can avoid the original structure of the existing building from being damaged, and can ensure the safety of foundation pit supporting; in addition, the first sheet pile structure, the second sheet pile structure, the third sheet pile structure, the pile top supporting component and the plugging structure can be constructed in an assembled mode, construction is simple and convenient, construction speed is high, construction cost and construction period of the foundation pit are greatly reduced, better economic and social benefits are achieved, recycling is achieved, and the idea of green environmental protection is better to trample.
Preferably, the pair of supporting pieces are I-steel or steel pipes.
In order to achieve the third purpose, the invention provides a method for supporting the connecting section of the foundation pit inside and outside the existing building, which comprises the following steps: (1) Providing a first sheet pile structure, a second sheet pile structure, a third sheet pile structure, a first connecting beam, a second connecting beam, an enclosing purlin and a plurality of blocking pieces, determining the positions of a foundation beam and a foundation connecting beam of an existing building, smoothly excavating earthwork to a preset distance below the bottom surface of the foundation beam, arranging the first sheet pile structure on the first side surfaces of two connecting sections, arranging the second sheet pile structure on the second side surfaces of two connecting sections, and arranging the third sheet pile structure on the third side surfaces of two connecting sections; (2) Fixedly connecting the first connecting beam with the first sheet pile structure, arranging the first connecting beam at the top edge positions of the two first side surfaces, fixedly connecting the second connecting beam with the third sheet pile structure, arranging the second connecting beam at the top edge positions of the two third side surfaces, fixedly connecting the enclosing purlin with the second sheet pile structure, and arranging the enclosing purlin at the top edge positions of the two second side surfaces, thereby forming a pile top supporting assembly for supporting the top of the connecting section; (3) connecting a pair of support members between two surrounding purlins; (4) excavating earthwork in layers, wherein the height of each layer is not more than 1 meter; (5) After the foundation connecting beam is excavated to the bottom of the foundation connecting beam, one of the plugging pieces is arranged below the foundation connecting beam, and two ends of the plugging piece are fixedly connected to the second sheet pile structure so as to plug the bottom space of the foundation connecting beam; (6) And along with the continuous excavation of earthwork, the rest of the plugging pieces are fixedly connected onto the second sheet pile structure from top to bottom, and the two upper and lower adjacent plugging pieces are tightly attached to each other so as to continuously plug the bottom space of the foundation connecting beam.
Compared with the prior art, the method for supporting the connecting section of the inner foundation pit and the outer foundation pit of the existing building has the advantages that the first sheet pile structure, the second sheet pile structure and the third sheet pile structure are correspondingly arranged on the first side face, the second side face and the third side face of the connecting section exposed to the outside so as to resist the soil pressure in the horizontal direction, the first sheet pile structure, the second sheet pile structure and the third sheet pile structure are fixedly positioned through the pile top supporting component, and meanwhile, the supporting seat can be arranged on the outer edge of the top of the supporting connecting section, so that the supporting safety of the soil body of the connecting section is ensured, and the plugging structure is arranged below the foundation connecting beam so as to plug the space below the foundation connecting beam, so that the earthwork of the second side face of the connecting section is prevented from collapsing due to the fact that the earthwork below the foundation connecting beam is excavated, and the original structure of the existing building is prevented from being damaged. Therefore, the method for supporting the connecting sections of the foundation pit inside and outside the existing building can avoid the original structure of the existing building from being damaged, and can ensure the safety of foundation pit supporting; in addition, the first sheet pile structure, the second sheet pile structure, the third sheet pile structure, the pile top supporting component and the plugging structure can be constructed in an assembled mode, construction is simple and convenient, construction speed is high, construction cost and construction period of the foundation pit are greatly reduced, better economic and social benefits are achieved, recycling is achieved, and the idea of green environmental protection is better to trample.
Drawings
Fig. 1 is a schematic perspective view of a support system according to the present invention for supporting a connection section between newly-built foundation pits inside and outside a building.
Fig. 2 is a schematic perspective view of the supporting structure of the present invention when supporting one of the connection sections.
Fig. 3 is a schematic perspective view of another angle of the supporting structure shown in fig. 2 when supporting one of the connection sections.
Fig. 4 is a schematic structural view of a pile top supporting assembly of the supporting structure of the present invention.
Fig. 5 is a schematic structural view of a plugging structure of the support structure of the present invention.
Detailed Description
In order to describe the technical content and constructional features of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 to 3, the support system 200 of the present invention is used for supporting a connection section 500, a foundation beam 600 and a foundation connecting beam 700 between an indoor foundation pit and an outdoor foundation pit of a building, wherein the connection section 500 has a first side 501, a second side 502 and a third side 503, the second side 502 is connected between the first side 501 and the third side 503, the foundation connecting beam 700 is disposed through the second side 502, two connection sections 500 between the indoor foundation pit 300 and the outdoor foundation pit 400 of the building are distributed relatively, and a communication space for communicating the indoor foundation pit 300 with the outdoor foundation pit 400 is provided between the two connection sections 500. The support system 200 comprises a pair of support pieces 6 and support structures 100, wherein the number of the support structures 100 is two, and the two support structures 100 correspondingly support two connecting sections 500; the supporting structure 100 comprises a first sheet pile structure 1, a second sheet pile structure 2, a third sheet pile structure 3, a pile top supporting component 4 and a plugging structure 5, wherein the first sheet pile structure 1 is arranged on a first side surface 501 of the connecting section 500, the second sheet pile structure 2 is arranged on a second side surface 502 of the connecting section 500, the third sheet pile structure 3 is arranged on a third side surface 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 sheet pile structure 2 and the third sheet pile structure 3 are respectively and fixedly connected with the pile top supporting component 4, and the plugging structure 5 is fixedly connected on the second sheet pile structure 2 and is positioned below the foundation tie beam 700 so as to plug a space below the foundation tie beam 700; the opposite supporting pieces 6 are connected between the two pile top supporting components 4, and a plurality of opposite supporting pieces 6 can be arranged to ensure the connection stability of the two supporting structures 100, thereby ensuring the stability of the supporting system 200, and specifically, the opposite supporting pieces 6 can be I-steel or steel pipes. The fixing connection method may be a welding method, but is not limited thereto, and may also be a bolt fixing method. More specifically, the following are:
referring to fig. 2 and 3, in the present 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 sequentially connected; the second sheet pile structure 2 comprises a plurality of second steel sheet piles 21, each second steel sheet pile 21 is vertically arranged on the second side surface 502, and each second steel sheet pile 21 is connected in sequence; the third sheet pile structure 3 comprises a plurality of third steel sheet piles 31, each third steel sheet pile 31 is vertically arranged on the third side surface 503, and each third steel sheet pile 31 is connected in sequence. The first steel sheet pile 11, the second steel sheet pile 21 and the third steel sheet pile 31 may be, but not limited to, conventional lason steel sheet piles. It is noted that in other embodiments, other sheet piles, such as wood sheet piles, may be used for the first, second and third sheet pile structures 1, 2, 3.
Referring to fig. 2 and 4, the pile top supporting component 4 includes a first connecting beam 41, a second connecting beam 42 and an enclosing purlin 43, the first connecting beam 41 is fixedly connected with the first sheet pile structure 1, the first connecting beam 41 is fixedly connected with the third sheet pile structure 3 along the top edge of the first side surface 501, the second connecting beam 42 is fixedly connected with the third sheet pile structure 3 along the top edge of the third side surface 503, the enclosing purlin 43 is fixedly connected with the second sheet pile structure 2, the enclosing purlin 43 is arranged along the top edge of the second side surface 502, and the enclosing purlin 43 can play a role in fixing the second sheet pile structure 2 and transmitting loads. Specifically, the first connecting beam 41 and the second connecting beam 42 may be channel steel connecting beams, and the enclosing purlin 43 may be an existing HW steel, but is not limited thereto. Further, the pile top supporting assembly 4 further includes a plurality of pairs of tie rods 44, and each pair of tie rods 44 is connected between the first connecting beam 41 and the second connecting beam 42. By arranging the opposite pull rods 44, the connection stability of the first connecting beam 41, the second connecting beam 42 and the enclosing purlin 43 is improved. Specifically, the pairs of tie rods 44 are disposed at equal intervals to ensure force balance. The counter pull rod 44 may be an existing channel steel counter pull rod, but is not limited thereto; the connection manner of the tie rod 44 and the first connecting beam 41 and the connection manner of the tie rod 44 and the second connecting beam 42 may be a conventional welding and fixing manner, but are not limited thereto.
Referring to fig. 2 and 5, in the present embodiment, the plugging structure 5 includes a plurality of plugging members 51, each of the plugging members 51 is sequentially and closely connected in an up-down direction and is located below the foundation tie beam 700, and two ends of the plugging member 51 are fixedly connected with the second sheet pile structure 2 respectively. The plugging pieces 51 are sequentially and closely connected below the foundation connecting beam 700 along the up-down direction, so that the space below the foundation connecting beam 700 is plugged, and the collapse of earthwork of the second side surface 502 of the connecting section 500 caused by excavation of earthwork below the foundation connecting beam 700 is avoided, and the original structure of the existing building is further prevented from being damaged. Specifically, the plugging member 51 at the top is closely attached to the bottom of the base contact beam 700, and fully plugs the entire space under the base contact beam 700, thereby further improving safety.
Referring to fig. 1 to 5, the method for supporting the connection section 500 of the foundation pit inside and outside the existing building according to the present invention comprises the following steps:
s1, providing a first sheet pile structure 1, a second sheet pile structure 2, a third sheet pile structure 3, a first connecting beam 41, a second connecting beam 42, an enclosing purlin 43 and a plurality of blocking pieces 51, determining the positions of a foundation beam 600 and a foundation connecting beam 700 of an existing building, smoothly excavating earthwork to a preset distance below the bottom surface of the foundation beam 600, setting a construction paying-off position, installing a guide frame according to the construction paying-off position, setting the first sheet pile structure 1 on a first side surface 501 of two connecting sections 500, setting the second sheet pile structure 2 on a second side surface 502 of the two connecting sections 500, and setting the third sheet pile structure 3 on a third side surface 503 of the two connecting sections 500;
s2, fixedly connecting a first connecting beam 41 with a first sheet pile structure 1, arranging the first connecting beam 41 at the top edge positions of two first side surfaces 501, fixedly connecting a second connecting beam 42 with a third sheet pile structure 3, arranging the second connecting beam 42 at the top edge positions of two third side surfaces 503, fixedly connecting an enclosing purlin 43 with a second sheet pile structure 2, and arranging the enclosing purlin 43 at the top edge positions of two second side surfaces 502, thereby forming a pile top supporting component 4 for supporting the top of a connecting section 500; a through groove is cut between the foundation beam 600 and the foundation connecting beam 700, a plurality of tie rods 44 pass through the through groove and are respectively connected between the first connecting beam 41 and the second connecting beam 42, and the tie rods 44 are arranged at equal intervals;
s3, connecting the opposite supporting piece 6 between the two surrounding purlins 43; cleaning earthwork of the slope top, and spraying plain concrete with the thickness of 100 millimeters on the slope top for protection;
s4, excavating earthwork in layers, wherein the height of each layer is not more than 1 meter;
s5, after the foundation connecting beam 700 is excavated to the bottom, one of the plugging pieces 51 is arranged below the foundation connecting beam 700, and two ends of the plugging piece 51 are fixedly connected to the second sheet pile structure 2 so as to plug the bottom space of the foundation connecting beam 700;
s6, along with the continuous excavation of earthwork, the rest of the blocking pieces 51 are fixedly connected to the second sheet pile structure 2 from top to bottom, and the upper and lower adjacent blocking pieces 51 are tightly attached to each other so as to continuously block the bottom space of the foundation connecting beam 700.
Wherein in S5 and S6 the overlap between the blocking element 51 and the second sheet pile structure 2 has a length in the range of 200-300 mm.
In summary, the first sheet pile structure 1, the second sheet pile structure 2 and the third sheet pile structure 3 are correspondingly arranged on the first side 501, the second side 502 and the third side 503 of the connecting section 500 exposed to the outside so as to resist the soil 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 fixedly positioned through the pile top supporting component 4, and meanwhile, a supporting seat can be arranged on the top outer edge of the supporting connecting section 500, so that the supporting safety of the soil body of the connecting section 500 is ensured, and the space below the foundation connecting beam 700 is blocked by arranging the blocking structure 5 below the foundation connecting beam 700, so that the collapse of the soil of the second side 502 of the connecting section 500 caused by the excavation of the soil below the foundation connecting beam 700 is avoided, and the original structure of the existing building is further prevented from being damaged. Therefore, the supporting structure 100 of the invention can avoid the original structure of the existing building from being damaged, and can ensure the safety of foundation pit supporting; in addition, the first sheet pile structure 1, the second sheet pile structure 2, the third sheet pile structure 3, the pile top supporting component 4 and the plugging structure 5 can be constructed in an assembling mode, the construction is simple and convenient, the construction speed is high, the construction cost and the construction period of the foundation pit are greatly reduced, better economic and social benefits are achieved, the recycling is achieved, and the green and environment-friendly idea of trampling is better.
The foregoing disclosure is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (9)
1. The utility model provides a supporting structure, is used for supporting the linkage segment, foundation beam and the foundation tie beam between the indoor and outdoor newly-built foundation ditch of building, the linkage segment has first side, second side and third side, the second side is connected in between first side and the third side, foundation tie beam wears to locate the second side, its characterized in that, supporting structure includes first sheet pile structure, second sheet pile structure, third sheet pile structure, pile top supporting component and shutoff structure, first sheet pile structure set up in the first side of linkage segment, the second sheet pile structure sets up in the second side of linkage segment, the third sheet pile structure sets up in the third side of linkage segment, pile top supporting component set up in the top of linkage segment, first sheet pile structure, second sheet pile structure and third sheet pile structure are respectively with pile top supporting component fixed connection, the second sheet pile structure is located the foundation tie beam below the shutoff structure is located to the foundation tie beam is fixed to the bottom;
the pile top supporting assembly comprises a first connecting beam, a second connecting beam, an enclosing purlin and a plurality of opposite pull rods, wherein 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 enclosing purlin is fixedly connected with the second sheet pile structure, and the enclosing purlin is arranged along the top edge of the second side surface; each pair of pull rods is connected between the first connecting beam and the second connecting beam respectively;
the plugging structure comprises a plurality of plugging pieces, the plugging pieces are sequentially and tightly connected along the upper direction and the lower direction and positioned below the foundation connecting beam, and two ends of the plugging pieces are fixedly connected with the second sheet pile structure respectively.
2. The support structure of claim 1, wherein the first sheet pile structure comprises a plurality of first steel sheet piles, each of the first steel sheet piles being disposed vertically on the first side, each of the first steel sheet piles being connected in sequence.
3. The support structure of claim 1, wherein the second sheet pile structure comprises a plurality of second steel sheet piles, each of the second steel sheet piles being disposed vertically on the second side, each of the second steel sheet piles being connected in sequence.
4. The support structure of claim 1, wherein the third sheet pile structure comprises a plurality of third steel sheet piles, each of the third steel sheet piles being disposed vertically on the third side, each of the third steel sheet piles being connected in sequence.
5. The support structure of claim 1, wherein each of said pairs of tie rods are equally spaced.
6. The support structure of claim 1, wherein the top-located plugs abut the bottom of the foundation tie beam.
7. A support system comprising a pair of support members and the support structure of any one of claims 1-6, the number of support structures being two, the pair of support members being connected between two pile top support assemblies.
8. The support system of claim 7, wherein the pair of struts are i-steel or steel tubes.
9. The supporting method for the connecting section of the inner foundation pit and the outer foundation pit of the existing building is characterized by comprising the following steps of:
(1) Providing a first sheet pile structure, a second sheet pile structure, a third sheet pile structure, a first connecting beam, a second connecting beam, an enclosing purlin and a plurality of blocking pieces, determining the positions of a foundation beam and a foundation connecting beam of an existing building, smoothly excavating earthwork to a preset distance below the bottom surface of the foundation beam, arranging the first sheet pile structure on the first side surfaces of two connecting sections, arranging the second sheet pile structure on the second side surfaces of two connecting sections, and arranging the third sheet pile structure on the third side surfaces of two connecting sections;
(2) Fixedly connecting the first connecting beam with the first sheet pile structure, arranging the first connecting beam at the top edge positions of the two first side surfaces, fixedly connecting the second connecting beam with the third sheet pile structure, arranging the second connecting beam at the top edge positions of the two third side surfaces, fixedly connecting the enclosing purlin with the second sheet pile structure, and arranging the enclosing purlin at the top edge positions of the two second side surfaces, thereby forming a pile top supporting assembly for supporting the top of the connecting section;
(3) Connecting a pair of supporting pieces between the two surrounding purlins;
(4) Excavating earthwork in layers, wherein the height of each layer is not more than 1 meter;
(5) After the foundation connecting beam is excavated to the bottom of the foundation connecting beam, one of the plugging pieces is arranged below the foundation connecting beam, and two ends of the plugging piece are fixedly connected to the second sheet pile structure so as to plug the bottom space of the foundation connecting beam;
(6) And along with the continuous excavation of earthwork, the rest of the plugging pieces are fixedly connected onto the second sheet pile structure from top to bottom, and the two upper and lower adjacent plugging pieces are tightly attached to each other so as to continuously plug the bottom space of the foundation connecting beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910831471.XA CN110512617B (en) | 2019-09-03 | 2019-09-03 | Supporting structure, supporting system and supporting method for connecting sections of foundation pits inside and outside existing building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910831471.XA CN110512617B (en) | 2019-09-03 | 2019-09-03 | Supporting structure, supporting system and supporting method for connecting sections of foundation pits inside and outside existing building |
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| Publication Number | Publication Date |
|---|---|
| CN110512617A CN110512617A (en) | 2019-11-29 |
| CN110512617B true CN110512617B (en) | 2024-03-15 |
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| CN201910831471.XA Active CN110512617B (en) | 2019-09-03 | 2019-09-03 | Supporting structure, supporting system and supporting method for connecting sections of foundation pits inside and outside existing building |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585678A (en) * | 1984-07-11 | 1986-04-29 | Kabushiki Kaisha Ask Kenkyusho | Steel sheet pile, sheet pile assembly thereof and the method of constructing the assembly |
| CN106284296A (en) * | 2016-09-28 | 2017-01-04 | 南京工业大学 | Supporting structure of double-row steel sheet piles and construction method thereof |
| CN109235445A (en) * | 2018-09-11 | 2019-01-18 | 中国化学工程第六建设有限公司 | Steel sheet pile and base pit stand construction |
-
2019
- 2019-09-03 CN CN201910831471.XA patent/CN110512617B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585678A (en) * | 1984-07-11 | 1986-04-29 | Kabushiki Kaisha Ask Kenkyusho | Steel sheet pile, sheet pile assembly thereof and the method of constructing the assembly |
| CN106284296A (en) * | 2016-09-28 | 2017-01-04 | 南京工业大学 | Supporting structure of double-row steel sheet piles and construction method thereof |
| CN109235445A (en) * | 2018-09-11 | 2019-01-18 | 中国化学工程第六建设有限公司 | Steel sheet pile and base pit stand construction |
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| CN110512617A (en) | 2019-11-29 |
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