CN215165915U - Reinforced structure for reinforcing existing building - Google Patents
Reinforced structure for reinforcing existing building Download PDFInfo
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- CN215165915U CN215165915U CN202121306710.9U CN202121306710U CN215165915U CN 215165915 U CN215165915 U CN 215165915U CN 202121306710 U CN202121306710 U CN 202121306710U CN 215165915 U CN215165915 U CN 215165915U
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Abstract
The utility model provides a reinforcing structure for reinforcing the existing building, wherein the foundation of the existing building is a raft plate; the reinforced structure comprises a jet grouting pile, a Larsen steel sheet pile and an anchor rod static pressure steel pipe pile, wherein the jet grouting pile is arranged around the raft; the Larsen steel plate pile penetrates through the jet grouting pile along the axial direction of the jet grouting pile, the top of the Larsen steel plate pile is higher than the top of the jet grouting pile, and the bottom of the Larsen steel plate pile is lower than the bottom of the jet grouting pile; the anchor rod static pressure steel-pipe pile runs through the raft, and the top of anchor rod static pressure steel-pipe pile is located the interval between the edge of major structure and raft, and the top and the raft of anchor rod static pressure steel-pipe pile are connected, and the bottom of anchor rod static pressure steel-pipe pile is less than the bottom of foundation ditch. The peripheral soil body of raft can be consolidated to the jet grouting pile, and the flexibility and the anti deformability of jet grouting pile can be increased to the larsen steel sheet pile to can prevent the groundwater infiltration raft board side of foundation ditch side, anchor rod static pressure steel-pipe pile can be consolidated, make the whole even subsidence of existing building and effectively prevent its too big settlement.
Description
Technical Field
The utility model relates to a construction technical field, in particular to reinforced structure that consolidates existing building.
Background
With the development of underground works such as subways and underground shopping malls, more and more works are set underground. In the underground engineering construction process, the ground needs to be excavated, and in the excavation process, if existing buildings are arranged around the excavation area, the existing buildings are possibly subjected to excessive settlement and even collapse in the excavation process.
However, no reinforcing structure is available to better prevent excessive settlement of existing buildings during excavation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a reinforced structure that consolidates is carried out existing building to solve the technical problem that does not have the too big settlement that prevents of existing building that reinforced structure can be better at present to excavate the in-process.
In order to solve the technical problem, the utility model provides a reinforcing structure for reinforcing an existing building, wherein the existing building is based on a raft, a main body structure is arranged on the raft, and the main body structure is spaced from the edge of the raft;
the reinforced structure comprises rotary jet grouting piles, Larsen steel sheet piles and anchor rod static pressure steel pipe piles, the rotary jet grouting piles are arranged around the raft, the tops of the rotary jet grouting piles are higher than the tops of the raft, and the bottoms of the rotary jet grouting piles are lower than the bottoms of the raft;
the Larsen steel sheet pile penetrates through the jet grouting pile along the axial direction of the jet grouting pile, the top of the Larsen steel sheet pile is higher than that of the jet grouting pile, and the bottom of the Larsen steel sheet pile is lower than that of the jet grouting pile; one side of the Larsen steel sheet pile is a foundation pit to be excavated, and the other side of the Larsen steel sheet pile is the existing building;
the anchor rod static pressure steel pipe pile runs through the raft, the top of the anchor rod static pressure steel pipe pile is located the main structure with on the interval between the edges of the raft, the top of the anchor rod static pressure steel pipe pile with the raft is connected, the bottom of the anchor rod static pressure steel pipe pile is less than the bottom of the foundation pit.
Optionally, an underground continuous wall is arranged around the foundation pit, and the bottom of the anchor rod static pressure steel pipe pile is lower than the bottom of the underground continuous wall.
Optionally, a soil layer and a C20 fine stone concrete layer are arranged inside the anchor rod static pressure steel pipe pile, the soil layer is located below the C20 fine stone concrete layer, and the height of the soil layer is 4-6 meters;
the bottom of the soil layer is flush with the bottom of the anchor rod static pressure steel pipe pile, and the top of the C20 fine stone concrete layer is flush with the top of the anchor rod static pressure steel pipe pile.
Optionally, the top of the anchor rod static pressure steel pipe pile is located inside the raft, a C35 concrete layer and a steel bar layer are arranged on the top of the anchor rod static pressure steel pipe pile, and the C35 concrete layer and the concrete layer included in the raft are connected into a whole; the reinforcing steel bar layer is positioned inside the C35 concrete layer and is connected with the reinforcing steel bars included in the raft plates in a welding mode.
Optionally, a tapered through hole is formed in the raft, the tapered through hole is used for being inserted into the anchor rod static pressure steel pipe pile, the top diameter of the tapered through hole is smaller than the bottom diameter of the tapered through hole, and the top diameter of the tapered through hole is larger than the diameter of the anchor rod static pressure steel pipe pile.
Optionally, the length of the jet grouting pile is 8 meters, the length of the larsen steel plate pile is 9 meters, and the length of the anchor rod static pressure steel pipe pile is 36 meters.
Optionally, the bottom of the anchor rod static pressure steel pipe pile is located in the powdery clay layer.
Optionally, the number of the jet grouting piles is two, and the larsen steel sheet piles penetrate through one row of the jet grouting piles close to the foundation pit.
Optionally, the major structure of existing building is the elevator, the first side of raft is located between elevator and the existing floor, the second side of raft with first side is parallel, the second side is close to the foundation ditch, the third side of raft is parallel with the fourth side, the third side with be provided with many between the elevator stock static pressure steel-pipe pile, the fourth side with be provided with many between the elevator stock static pressure steel-pipe pile.
Optionally, the anchor rod static pressure steel pipe piles are symmetrically arranged around the elevator.
The utility model provides a pair of carry out reinforced structure that consolidates to existing building, set up and spout the stake soon and can consolidate the peripheral soil body of raft, it can increase the flexibility and the anti deformability who spouts the stake to set up the Larsen steel sheet pile, and can prevent the groundwater infiltration raft board side of foundation ditch side, it can consolidate the raft to set up stock static pressure steel-pipe pile, stock static pressure steel-pipe pile and natural foundation undertake upper portion major structure's load jointly, stock static pressure steel-pipe pile can make the whole even sinking of existing building, and prevent effectively that it from subsiding excessively greatly.
Drawings
Fig. 1 is a schematic structural diagram of a reinforcing structure for reinforcing an existing building according to an embodiment of the present invention.
Fig. 2 is a schematic view of a part of the top position of the anchor rod static pressure steel pipe pile according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of an anchor rod static pressure steel pipe pile and a raft provided by an embodiment of the present invention.
Fig. 4 is a cross-sectional view of a reinforcing structure for reinforcing an existing building according to an embodiment of the present invention.
[ reference numerals are described below ]:
the existing building-1, the raft-11, the main structure-12, the raft including the steel bar-111, the conical through hole-112; the method comprises the following steps of (1) jet grouting pile-2, Larsen steel sheet pile-3, anchor rod static pressure steel pipe pile-4, anchor rod-5, foundation pit-6, ground-7 and existing floor-8; basement outer wall and floor-81 of existing floor; soil layer-41, C20 fine stone concrete layer-42, C35 concrete layer-43 and reinforcing steel layer-44.
Detailed Description
To make the objects, advantages and features of the present invention clearer, the present invention provides a reinforced structure for reinforcing existing buildings, which is further described in detail with reference to the accompanying drawings. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
The present embodiment provides a reinforcing structure for reinforcing an existing building, and referring to fig. 1 to 4, a raft 11 is a foundation of the existing building 1, a main body structure 12 is arranged on the raft 11, and the main body structure 12 is spaced from the edge of the raft 11; the reinforced structure comprises a jet grouting pile 2, a Larsen steel sheet pile 3 and an anchor rod static pressure steel pipe pile 4, wherein the jet grouting pile 2 is arranged around the raft 11, the top of the jet grouting pile 2 is higher than the top of the raft 11, and the bottom of the jet grouting pile 2 is lower than the bottom of the raft 11; the Larsen steel sheet pile 3 penetrates through the jet grouting pile 2 along the axial direction of the jet grouting pile 2, the top of the Larsen steel sheet pile 3 is higher than the top of the jet grouting pile 2, and the bottom of the Larsen steel sheet pile 3 is lower than the bottom of the jet grouting pile 2; one side of the Larsen steel sheet pile 3 is a foundation pit 6 to be excavated, and the other side of the Larsen steel sheet pile is the existing building; the anchor rod static pressure steel pipe piles 4 penetrate through the raft 11, the top of the anchor rod static pressure steel pipe piles 4 is located on the interval between the edges of the main body structure 12 and the raft 11, the top of the anchor rod static pressure steel pipe piles 4 is connected with the raft 11, and the bottom of the anchor rod static pressure steel pipe piles 4 is lower than the bottom of the foundation pit 6.
Wherein below is deeper into the ground; the top of the larsen steel sheet pile 3 may be in the same plane as the ground 7.
The embodiment provides a carry out reinforced structure of reinforcement to existing building, set up jet grouting pile 2 and can consolidate the peripheral soil body of raft 11, set up Larsen steel sheet pile 3 and can increase jet grouting pile 2's flexibility and anti deformability, and can prevent the groundwater infiltration raft 11 side of 6 sides in foundation ditch, it can consolidate raft 11 to set up anchor rod static pressure steel-pipe pile 4, anchor rod static pressure steel-pipe pile 4 undertakes upper portion major structure 12's load with natural foundation jointly, anchor rod static pressure steel-pipe pile 4 can make the whole even sinking of existing building, and prevent effectively that it from excessively greatly subsiding.
The reinforcing structure for reinforcing the existing building provided by the embodiment can control the settlement or the rise of the existing building within 4mm, meet the conventional construction requirement of +/-2 cm, and keep the original use function of the existing building.
Optionally, referring to fig. 1, an underground continuous wall is arranged around the foundation pit 6, and the bottom of the anchor rod static pressure steel pipe pile 4 is lower than the bottom of the underground continuous wall. This arrangement can further reduce settlement of existing buildings.
Optionally, referring to fig. 3, a soil layer 41 and a C20 fine stone concrete layer 42 are arranged inside the anchor rod static pressure steel pipe pile 4, the soil layer 41 is located below the C20 fine stone concrete layer 42, and the height of the soil layer 41 is 4-6 meters; the bottom of the soil layer 41 is flush with the bottom of the anchor rod static pressure steel pipe pile 4, and the top of the C20 fine stone concrete layer 42 is flush with the top of the anchor rod static pressure steel pipe pile 4. The strength of the anchor rod static pressure steel pipe pile 4 can be improved by the arrangement. The soil layer 41 is reserved in the anchor rod static pressure steel pipe pile 4, so that the use amount of C20 fine aggregate concrete can be reduced, and the cost is reduced. In other embodiments, the inside of the anchor rod static pressure steel pipe pile 4 may be provided with the C20 fine stone concrete layer 42 to further improve the strength of the anchor rod static pressure steel pipe pile 4.
Optionally, referring to fig. 2, the top of the anchor rod static pressure steel pipe pile 4 is located inside the raft 11, a C35 concrete layer 43 and a steel bar layer 44 are arranged on the top of the anchor rod static pressure steel pipe pile 4, and the C35 concrete layer 43 is integrated with the concrete layer included in the raft 11; the reinforcing layer 44 is located inside the C35 concrete layer 43 and is welded to the reinforcing bars 111 included in the raft 11. The top that sets up like this and can make stock static pressure steel-pipe pile 4 forms an organic whole structure with raft 11, increases anti effect of subsiding.
Optionally, referring to fig. 1-2, a tapered through hole 112 is provided on the raft 11, the tapered through hole 112 is used for inserting the anchor rod static pressure steel pipe pile 4, a top diameter of the tapered through hole 112 is smaller than a bottom diameter of the tapered through hole 112, and a top diameter of the tapered through hole 112 is larger than a diameter of the anchor rod static pressure steel pipe pile 4. The tapered through hole 112 can guide the anchor rod static pressure steel pipe pile 4, and the anchor rod static pressure steel pipe pile 4 is conveniently pressed into the position below a foundation by a jack. The tapered through hole 112 can be embedded with 6M 25 anchor rods 5 to provide pile-pressing counterforce.
Optionally, referring to fig. 1 to 4, the length of the jet grouting pile 2 is 8 meters, the length of the larsen steel sheet pile 3 is 9 meters, and the length of the anchor rod static pressure steel pipe pile 4 is 36 meters. Wherein, the length refers to the height of the pile; the length of the single anchor rod static pressure steel pipe pile 4 can be 2-3 meters, and the piles are connected in a welding mode; the jet grouting pile 2 may have a diameter of 600 mm. The arrangement can reinforce most of the existing buildings. The length of each pile can be adjusted according to actual conditions during specific construction.
Optionally, the bottom of the anchor rod static pressure steel pipe pile 4 is located in the powder clay layer. The arrangement can reduce the settlement of the existing building.
Optionally, referring to fig. 1, the jet grouting piles 2 are arranged in two rows, and the larsen steel sheet pile 3 penetrates through one row of jet grouting piles 2 close to the foundation pit 6. One row of jet grouting piles 2 close to the foundation pit 6 and the Larsen steel sheet piles 3 jointly form a waterproof curtain, the waterproof effect can be improved, and the Larsen steel sheet piles 3 can also increase the flexibility and the deformation resistance of the jet grouting piles 2.
Optionally, refer to fig. 1 and 4 and show, the major structure 12 of existing building is the elevator, raft 11's first side is located between elevator and the existing floor 8, raft 11's second side with first side is parallel, the second side is close to foundation ditch 6, raft 11's third side is parallel with the fourth side, the third side with be provided with many between the elevator stock static pressure steel-pipe pile 4, the fourth side with be provided with many between the elevator stock static pressure steel-pipe pile 4. The elevator in this embodiment may be an elevator that is added outside the existing floor 8 after the construction of the existing floor 8 is completed, and the elevator may be reinforced by the scheme provided in this embodiment. The top of the basement exterior wall and floor 81 of the existing floor is located below ground 7.
Alternatively, referring to fig. 1 and 4, a plurality of anchor rod static pressure steel pipe piles 4 are symmetrically arranged about the elevator. Thus, the pressure on the raft 11 can be uniformly dispersed into the foundation through the anchor rod static pressure steel pipe piles 4.
As a specific example, referring to fig. 1 to 4, two elevators are provided on one side of the existing floor 8, and the reinforcing structures corresponding to the two elevators are the same. The diameter of the anchor rod static pressure steel pipe pile 4 is
The wall thickness was 8mm and the length L was 36 m. The design value of the bearing capacity of the single pile (of the anchor rod static pressure steel pipe pile 4) is designed according to the foundation design specification (DGJ08-11-2010)7.2.8 of Shanghai city. Soil layer conditions and single pile bearing capacity are shown in the following table:
the standard value of the vertical bearing capacity of the single anchor rod static pressure steel pipe pile 4 can be 900kN, and the design value of the vertical bearing capacity of the single anchor rod static pressure steel pipe pile can be 450 kN. The 5 th to 31b th layers with good soil property are selected as pile foundation bearing layers, and the settlement compression layers are mainly the 7 th to 12 th layers and the 8 th to 1 st layers.
To sum up, the utility model provides a pair of carry out reinforced structure that consolidates to existing building, set up jet grouting pile 2 and can consolidate the peripheral soil body of raft 11, set up Larsen steel sheet pile 3 and can increase jet grouting pile 2's flexibility and resistance to deformation ability, and can prevent the groundwater infiltration raft 11 side of 6 sides in foundation ditch, set up stock static pressure steel-pipe pile 4 and can consolidate raft 11, upper portion major structure 12's load is born jointly with natural ground to stock static pressure steel-pipe pile 4, stock static pressure steel-pipe pile 4 can make the whole even sinking of existing building, and prevent effectively that it from excessively greatly subsiding.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art according to the above disclosure are within the scope of the present invention.
Claims (10)
1. A reinforced structure for reinforcing an existing building, which is characterized in that the foundation of the existing building is a raft plate, a main body structure is arranged on the raft plate, and the main body structure is spaced from the edge of the raft plate;
the reinforced structure comprises rotary jet grouting piles, Larsen steel sheet piles and anchor rod static pressure steel pipe piles, the rotary jet grouting piles are arranged around the raft, the tops of the rotary jet grouting piles are higher than the tops of the raft, and the bottoms of the rotary jet grouting piles are lower than the bottoms of the raft;
the Larsen steel sheet pile penetrates through the jet grouting pile along the axial direction of the jet grouting pile, the top of the Larsen steel sheet pile is higher than that of the jet grouting pile, and the bottom of the Larsen steel sheet pile is lower than that of the jet grouting pile; one side of the Larsen steel sheet pile is a foundation pit to be excavated, and the other side of the Larsen steel sheet pile is the existing building;
the anchor rod static pressure steel pipe pile runs through the raft, the top of the anchor rod static pressure steel pipe pile is located the main structure with on the interval between the edges of the raft, the top of the anchor rod static pressure steel pipe pile with the raft is connected, the bottom of the anchor rod static pressure steel pipe pile is less than the bottom of the foundation pit.
2. The reinforcement structure for reinforcing an existing building according to claim 1, wherein an underground continuous wall is provided around the foundation pit, and a bottom of the anchor rod static pressure steel pipe pile is lower than a bottom of the underground continuous wall.
3. The reinforcing structure for existing buildings according to claim 1, wherein the anchor rod static pressure steel pipe pile is internally provided with a soil layer and a C20 fine stone concrete layer, the soil layer is positioned below the C20 fine stone concrete layer, and the height of the soil layer is 4-6 m;
the bottom of the soil layer is flush with the bottom of the anchor rod static pressure steel pipe pile, and the top of the C20 fine stone concrete layer is flush with the top of the anchor rod static pressure steel pipe pile.
4. The reinforced structure for reinforcing the existing building, according to claim 1, wherein the top of the anchor rod static pressure steel pipe pile is positioned inside the raft, the top of the anchor rod static pressure steel pipe pile is provided with a C35 concrete layer and a steel bar layer, and the C35 concrete layer is integrated with the concrete layer included in the raft; the reinforcing steel bar layer is positioned inside the C35 concrete layer and is connected with the reinforcing steel bars included in the raft plates in a welding mode.
5. The reinforcement structure for reinforcing an existing building according to claim 1, wherein the raft is provided with tapered through holes for inserting the anchor rod static pressure steel pipe piles, the top diameter of the tapered through holes is smaller than the bottom diameter of the tapered through holes, and the top diameter of the tapered through holes is larger than the diameter of the anchor rod static pressure steel pipe piles.
6. The reinforcement structure for reinforcing an existing building according to claim 1, wherein the length of the jet grouting pile is 8m, the length of the larsen steel sheet pile is 9 m, and the length of the anchor rod static pressure steel pipe pile is 36 m.
7. The reinforcing structure for reinforcing an existing building, according to claim 1, wherein the bottom of the anchor rod static pressure steel pipe pile is located at the powder clay layer.
8. The reinforcement structure for existing buildings according to claim 1, wherein the number of the jet grouting piles is two, and the larsen steel sheet pile penetrates through the one row of the jet grouting piles near the foundation pit.
9. The reinforcement structure for reinforcing an existing building according to claim 1, wherein the main structure of the existing building is an elevator, the first side of the raft is located between the elevator and an existing floor, the second side of the raft is parallel to the first side, the second side is close to the foundation pit, the third side of the raft is parallel to the fourth side, a plurality of anchor rod static pressure steel pipe piles are arranged between the third side and the elevator, and a plurality of anchor rod static pressure steel pipe piles are arranged between the fourth side and the elevator.
10. The reinforcing structure for reinforcing an existing building, according to claim 9, wherein a plurality of the anchor rod static pressure steel pipe piles are symmetrically disposed with respect to the elevator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121306710.9U CN215165915U (en) | 2021-06-10 | 2021-06-10 | Reinforced structure for reinforcing existing building |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121306710.9U CN215165915U (en) | 2021-06-10 | 2021-06-10 | Reinforced structure for reinforcing existing building |
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| CN215165915U true CN215165915U (en) | 2021-12-14 |
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| CN202121306710.9U Active CN215165915U (en) | 2021-06-10 | 2021-06-10 | Reinforced structure for reinforcing existing building |
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- 2021-06-10 CN CN202121306710.9U patent/CN215165915U/en active Active
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