CN114991557A - Concrete strip foundation reinforced by additional concrete sleeve and construction method thereof - Google Patents
Concrete strip foundation reinforced by additional concrete sleeve and construction method thereof Download PDFInfo
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- CN114991557A CN114991557A CN202210747339.2A CN202210747339A CN114991557A CN 114991557 A CN114991557 A CN 114991557A CN 202210747339 A CN202210747339 A CN 202210747339A CN 114991557 A CN114991557 A CN 114991557A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/027—Preventive constructional measures against earthquake damage in existing buildings
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/48—Foundations inserted underneath existing buildings or constructions
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0229—Increasing or restoring the load-bearing capacity of building construction elements of foundations or foundation walls
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Abstract
The invention relates to a concrete strip foundation reinforced by an additional concrete sleeve and a construction method thereof, wherein the concrete strip foundation comprises the additional concrete sleeve, a new concrete cushion, an anchoring steel bar, an outer sleeve base, anchoring angle steel, a wall-penetrating bolt, a ring main bar, a vertical steel bar and a horizontal steel bar, and the concrete strip foundation is characterized in that: the additional concrete sleeves are positioned on two sides of the concrete strip foundation; the external concrete sleeve is bent by the ring main rib, the lower end of the external concrete sleeve is connected with the outer sleeve base, and the upper end of the external concrete sleeve is welded with the anchoring angle steel; the anchoring angle steel is arranged along the whole length of the concrete shear wall in the horizontal direction, and the anchoring angle steel is connected and fixed with the through-wall bolt; two ends of the through-wall bolt are fixedly connected with the long limb part of the anchoring angle steel through nuts; the top of the vertical steel bar in the outer sleeve base is welded with the ring main bar, and the foundation has the most remarkable advantage of effectively improving the strength, rigidity and durability of the foundation.
Description
Technical Field
The invention relates to a concrete strip foundation reinforced by an additional concrete sleeve and a construction method thereof, belonging to the technical field of seismic reinforcement of existing buildings.
Background
At present, a large number of existing buildings cannot meet the requirement of earthquake resistance, earthquake resistance reinforcement and transformation need to be carried out on the buildings, and particularly, the foundation part is relatively weak. The existing building earthquake-resistant reinforcement transformation aims to solve the problem of reinforcement of foundation foundations firstly, and the load of the whole building is transmitted to the foundation through the foundation, so that the earthquake-resistant reinforcement of the foundation foundations plays a significant role in the earthquake-resistant reinforcement of the existing buildings. Only if the foundation has enough strength, rigidity and durability, the safety and normal use of the whole building can be ensured.
The invention mainly aims at the existing concrete structure strip foundation which can not meet the requirement of bearing capacity, and adopts a method of adding a concrete sleeve to increase the base area of the foundation to perform earthquake-resistant reinforcement, and the reinforcement method is suitable for the existing concrete structure strip foundation when the bearing capacity of the foundation or the base area size of the foundation can not meet the requirement.
Disclosure of Invention
The invention provides a concrete strip foundation reinforced by an additional concrete sleeve and a construction method thereof, which mainly aim to improve the strength, rigidity and durability of a foundation and ensure the safety and normal use of a whole building.
The technical scheme of the invention is as follows:
the utility model provides an adopt plus concrete cover to consolidate concrete bar foundation and construction method thereof, includes plus concrete cover, newly-added concrete cushion, anchor reinforcing bar, overcoat base, anchor angle steel, wall bolt, ring owner muscle, vertical reinforcement, horizontal reinforcement, its characterized in that: the additional concrete sleeves are positioned on two sides of the concrete strip foundation, when the foundation bears eccentric compression, the asymmetric widened strip foundation is adopted, and when the foundation bears central compression, the symmetric widened strip foundation is adopted; the external concrete sleeve is bent by the ring main rib, the lower end of the external concrete sleeve is connected with the outer sleeve base, and the upper end of the external concrete sleeve is welded with the anchoring angle steel; horizontal steel bars and stirrups are bound in the externally-added concrete sleeve; the ring main reinforcement of the external concrete sleeve and the anchoring reinforcement are welded together; the anchoring steel bars are embedded into the concrete shear wall every 300-400 mm along the height direction from the outer sleeve base to the concrete shear wall, and the anchoring steel bars are embedded into the anchoring steel bars every 400mm along the horizontal direction; the depth of the anchoring steel bar implanted into the concrete shear wall or the original concrete strip foundation is not less than 180 mm; the anchoring angle steel is arranged along the horizontal direction of the concrete shear wall in a full-length mode, mounting holes are made in the long limb parts of the anchoring angle steel in advance, the anchoring angle steel is arranged close to the wall, the anchoring angle steel is connected and fixed with wall penetrating bolts, and then epoxy resin glue is poured for filling the gaps; the short limb part of the anchoring angle steel is welded with a main ring rib; the through-wall bolt is provided with a hole in the concrete shear wall in advance, and after penetrating through the hole of the concrete shear wall, the two ends of the through-wall bolt are fastened and connected with the long limb part of the anchoring angle steel by nuts; the top of the vertical steel bar in the jacket base is welded with the ring main bar; the horizontal steel bars are arranged along the whole length in the horizontal direction; the material used by the newly added concrete cushion layer is the same as that of the original basic cushion layer; the additional concrete sleeve is divided into separate sections every 1500-2000 mm in the horizontal direction, and construction can be carried out in batches, in sections or at intervals.
Further, the strength grade of the additional concrete sheath concrete is not lower than C30.
Furthermore, the main ring ribs are phi 12 steel bars and are arranged one by one at intervals of 300-400 mm along the horizontal direction.
Furthermore, the horizontal steel bars and the stirrups bound in the externally-added concrete sleeve are phi 6 steel bars, and the horizontal steel bars are arranged in a phi 6@300 mode.
Furthermore, the type of the anchoring angle steel is L75 multiplied by 50 multiplied by 8.
Furthermore, the outer sleeve base is composed of 5 phi 12 steel bars, and the strength grade of the poured concrete is not lower than C20.
Furthermore, the anchoring steel bars and the vertical steel bars are phi 16 steel bars, and hot rolled steel bars of HPB300 or HRB335 grade are adopted.
Further, the minimum thickness of the additional concrete sleeve is not less than 200 mm.
Furthermore, welding wires of the anchoring angle steel and the steel bars and welding wires of the steel bars are all E50 series welding wires.
The concrete strip foundation reinforced by the additional concrete sleeve and the construction method thereof adopt the following steps:
the method comprises the following steps: firstly, drilling a hole in a concrete shear wall according to the requirements of a design drawing, installing a through-wall bolt and fixing an anchoring angle steel;
step two: and (4) chiseling and cleaning the concrete shear wall and the original concrete strip foundation.
Step three: and paving a cushion layer made of the same material as the original foundation cushion layer on the foundation of the widened part of the original foundation cushion layer, and tamping.
Step four: before the steel bars are bound in the concrete sleeve and concrete is poured, a layer of high-strength cement paste or a concrete interface agent is paved to increase the binding force of the concrete foundation between the new structure and the old structure.
Step five: and (4) punching on the original concrete strip foundation according to a design drawing, and implanting anchoring reinforcing steel bars.
Step six: and welding the ring main reinforcement on the anchoring angle steel and the anchoring reinforcing steel bar, bending the lower end of the ring main reinforcement into a closed ring shape to serve as the jacket base reinforcing steel bar, welding the vertical reinforcing steel bar on the ring main reinforcement, and binding the horizontal reinforcing steel bar and the stirrup.
Step seven: and (4) before the additional concrete sleeve is poured, carrying out concrete pouring construction after the steel bar arrangement, the anchoring steel bar arrangement, the template support and the like are checked to be qualified.
Has the beneficial effects that:
the concrete strip foundation has the most obvious advantages that the concrete strip foundation is reinforced by the additional concrete sleeve, the strength, the rigidity and the durability of the foundation can be effectively improved, the construction period is short, and the concrete strip foundation is safe and reliable. The method is particularly suitable for the seismic reinforcement of the strip foundation with the existing concrete structure when the bearing capacity of the foundation or the base area size of the foundation does not meet the requirement. If the technology is popularized and applied to the seismic reinforcement of the old building, the economic benefit and the social benefit are obvious.
Drawings
FIG. 1 is a schematic plan view of a concrete sheath reinforced concrete strip foundation;
fig. 2 is a sectional view of fig. 1 through 1.
In the figure, 1: adding a concrete sleeve; 2: adding a concrete cushion; 3: an original foundation pad layer; 4: anchoring the steel bars; 5: a concrete shear wall; 6: original concrete strip foundation; 7: a jacket base; 8: anchoring angle steel; 9: a through-wall bolt; 10: a ring main rib; 11: vertical reinforcing steel bars; 12: and (7) horizontal reinforcing steel bars.
Detailed Description
The utility model provides an adopt plus concrete cover to consolidate concrete bar foundation and construction method thereof, refer to fig. 1, fig. 2 and show, including plus concrete cover 1, newly add concrete cushion 2, anchor reinforcing bar 4, overcoat base 7, anchor angle steel 8, through-wall bolt 9, ring owner muscle 10, vertical reinforcement 11, horizontal reinforcement 12, its characterized in that: the additional concrete sleeve 1 is positioned on two sides of the original concrete strip foundation 6, when the foundation bears eccentric compression, the asymmetric widened strip foundation is adopted, and when the foundation bears central compression, the symmetric widened strip foundation is adopted; the external concrete sleeve 1 is bent by the ring main reinforcement 10, the lower end of the external concrete sleeve is connected with the outer sleeve base 7, and the upper end of the external concrete sleeve is welded with the anchoring angle steel 8; horizontal steel bars 12 and stirrups are bound in the additional concrete sleeve 1; the ring main reinforcement 10 of the additional concrete sleeve 1 is welded with the anchoring reinforcement 4; the anchoring steel bars 4 are embedded into the concrete shear wall 5 every 300-400 mm along the height direction from the outer sleeve base 7 to the concrete shear wall 4, and the anchoring steel bars 4 are embedded into the anchoring steel bars 4 every 400mm along the horizontal direction; the depth of the anchoring steel bar 4 implanted into the concrete shear wall 5 or the original concrete strip foundation 6 is not less than 180 mm; the anchoring angle steel 8 is arranged along the whole length of the concrete shear wall 5 in the horizontal direction, a mounting hole is made in the long limb part of the anchoring angle steel 8 in advance, the anchoring angle steel is arranged to be attached to the wall and is connected and fixed with a wall penetrating bolt 9, and then epoxy resin glue is poured for filling gaps; the short limb part of the anchoring angle steel 8 is welded with a main ring rib 10; the through-wall bolt 9 is provided with a hole in the concrete shear wall 5 in advance, and after penetrating through the hole in the concrete shear wall 5, the two ends of the through-wall bolt are fastened and connected with the long limb part of the anchoring angle steel 8 by nuts; the top of a vertical steel bar 11 in the outer sleeve base 7 is welded with a ring main bar 10; the horizontal steel bars 12 are arranged along the whole length in the horizontal direction; the material used by the newly added concrete cushion layer 2 is the same as the material of the original foundation cushion layer 3; the additional concrete sleeve 1 is divided into separate sections at intervals of 1500-2000 mm along the horizontal direction, and can be constructed in batches, in sections or at intervals.
Further, the strength grade of the concrete of the additional concrete sleeve 1 is not lower than C30.
Furthermore, the ring main reinforcement 10 is a phi 12 reinforcement and is arranged one by one at intervals of 300-400 mm along the horizontal direction.
Furthermore, the horizontal steel bars 12 and the stirrups bound in the additional concrete sleeve 1 are phi 6 steel bars, and the horizontal steel bars 12 are arranged in a phi 6@300 mode.
Further, the model number of the anchoring angle steel 8 is L75 multiplied by 50 multiplied by 8.
Furthermore, the outer sleeve base 7 is formed by 5 phi 12 steel bars, and the strength grade of the poured concrete is not lower than C20.
Furthermore, the anchoring steel bars 4 and the vertical steel bars 11 are phi 16 steel bars, and hot rolled steel bars of HPB300 or HRB335 grade are adopted.
Further, the minimum thickness of the additional concrete sleeve 1 is not less than 200 mm.
Further, welding between the anchoring angle steel 8 and the steel bars, welding between the steel bars and welding rods are all E50 series welding rods.
The concrete strip foundation reinforced by the additional concrete sleeve and the construction method thereof adopt the following steps:
the method comprises the following steps: firstly, drilling holes in a concrete shear wall 5 according to the requirements of design drawings, installing wall penetrating bolts 9 and fixing anchoring angle steel 8;
step two: and (3) chiseling and cleaning the concrete shear wall 5 and the original concrete strip foundation 6.
Step three: and paving a cushion layer made of the same material as the original foundation cushion layer 3 on the foundation of the widened part of the original foundation cushion layer 3, and tamping.
Step four: before the steel bars are bound in the concrete sleeve 1 and concrete is poured, a layer of high-strength-grade cement paste is paved or a concrete interface agent is coated to increase the binding force of the concrete foundation between the new structure and the old structure.
Step five: and (4) punching holes on the original concrete strip foundation 6 according to a design drawing, and implanting anchoring steel bars 4.
Step six: welding the ring main reinforcement 10 on the anchoring angle steel 8 and the anchoring reinforcement 4, bending the lower end of the ring main reinforcement 10 into a closed ring shape as the reinforcement of the jacket base 7, welding the vertical reinforcement 11 on the ring main reinforcement 10, and then binding the horizontal reinforcement 12 and the stirrup.
Step seven: and (3) before the additional concrete sleeve 1 is poured, carrying out concrete pouring construction after the steel bar arrangement, the anchoring steel bar 4 arrangement, the template support and the like are checked to be qualified.
The above is a typical embodiment of the present invention, and the specific implementation of the present invention is not limited thereto.
Claims (9)
1. A concrete strip foundation reinforced by an additional concrete sleeve and a construction method thereof are characterized in that: including plus concrete cover (1), newly-added concrete cushion (2), anchor reinforcing bar (4), overcoat base (7), anchor angle steel (8), through-wall bolt (9), ring owner muscle (10), vertical reinforcement (11), horizontal reinforcement (12), its characterized in that: the additional concrete sleeve (1) is positioned on two sides of the original concrete strip foundation (6), when the foundation bears eccentric compression, the asymmetric widened strip foundation is adopted, and when the foundation bears central compression, the symmetric widened strip foundation is adopted; the external concrete sleeve (1) is bent by the ring main rib (10), the lower end of the external concrete sleeve is connected with the outer sleeve base (7), and the upper end of the external concrete sleeve is welded with the anchoring angle steel (8); horizontal steel bars (12) and stirrups are bound in the additional concrete sleeve (1); the ring main reinforcement (10) of the additional concrete sleeve (1) is welded with the anchoring reinforcement (4); the anchoring steel bars (4) are embedded into the concrete shear wall (5) every 300-400 mm along the height direction from the outer sleeve base (7) to the concrete shear wall, and the anchoring steel bars (4) are embedded into the anchoring steel bars (4) every 400mm along the horizontal direction; the depth of the anchoring steel bar (4) implanted into the concrete shear wall (5) or the original concrete strip foundation (6) is not less than 180 mm; the anchoring angle steel (8) is arranged along the horizontal direction of the concrete shear wall (5) in a full-length mode, a mounting hole is made in the long limb part of the anchoring angle steel (8) in advance, the anchoring angle steel is arranged close to the wall, is connected and fixed with a wall penetrating bolt (9), and then epoxy resin glue is poured for filling the gap; the short limb part of the anchoring angle steel (8) is welded with a main ring rib (10); the through-wall bolt (9) is provided with a hole in the concrete shear wall (5) in advance, and after penetrating through the hole in the concrete shear wall (5), two ends of the through-wall bolt are fastened and connected with the long limb part of the anchoring angle steel (8) by nuts; the top of a vertical steel bar (11) in the outer sleeve base (7) is welded with the ring main bar (10); the additional concrete sleeve (1) is divided into separate sections every 1500-2000 mm in the horizontal direction, and construction can be carried out in batches, sections or intervals.
2. The method for reinforcing the concrete strip foundation by the additional concrete sleeve and the construction method thereof according to the claim 1, is characterized in that: the concrete strength grade of the additional concrete sleeve (1) is not lower than C30.
3. The method for reinforcing the concrete strip foundation by the additional concrete sleeve and the construction method thereof according to the claim 1 are characterized in that: the ring main reinforcement (10) is a phi 12 reinforcement and is arranged one by one at intervals of 300-400 mm along the horizontal direction.
4. The method for reinforcing the concrete strip foundation by the additional concrete sleeve and the construction method thereof according to the claim 1 are characterized in that: horizontal steel bars (12) and stirrups bound in the externally-added concrete sleeve (1) are phi 6 steel bars, and the horizontal steel bars (12) are arranged in a phi 6@300 mode.
5. The method for reinforcing the concrete strip foundation by the additional concrete sleeve and the construction method thereof according to the claim 1, is characterized in that: the type of the anchoring angle steel (8) is L75 multiplied by 50 multiplied by 8.
6. The method for reinforcing the concrete strip foundation by the additional concrete sleeve and the construction method thereof according to the claim 1 are characterized in that: the outer sleeve base (7) is formed by 5 phi 12 steel bars, and the strength grade of the poured concrete is not lower than C20.
7. The method for reinforcing the concrete strip foundation by the additional concrete sleeve and the construction method thereof according to the claim 1 are characterized in that: the anchoring steel bars (4) and the vertical steel bars (11) are phi 16 steel bars, and hot rolled steel bars of HPB300 or HRB335 grade are adopted.
8. The method for reinforcing the concrete strip foundation by the additional concrete sleeve and the construction method thereof according to the claim 1 are characterized in that: the minimum thickness of the additional concrete sleeve (1) is not less than 200 mm.
9. The method for reinforcing the concrete strip foundation by the additional concrete sleeve and the construction method thereof according to any one of claims 1 to 8, is characterized in that: the method comprises the following steps:
the method comprises the following steps: firstly, drilling holes on a concrete shear wall (5) according to the requirements of design drawings, installing wall penetrating bolts (9) and fixing anchoring angle steel (8);
step two: and (3) roughening and cleaning the concrete shear wall (5) and the original concrete strip foundation (6).
Step three: and paving a cushion layer made of the same material as the original foundation cushion layer (3) on the foundation of the widened part of the original foundation cushion layer (3), and tamping.
Step four: before steel bars are bound in the additional concrete sleeve (1) and concrete is poured, a layer of high-strength-grade cement paste is paved or a concrete interface agent is coated to increase the bonding force of the concrete foundation between the new structure and the old structure.
Step five: and (4) punching holes on the original concrete strip foundation (6) according to a design drawing, and implanting anchoring steel bars (4).
Step six: the ring main reinforcement (10) is welded on the anchoring angle steel (8) and the anchoring reinforcing steel bar (4), the lower end of the ring main reinforcement (10) is bent into a closed ring shape to serve as a jacket base (7) reinforcing steel bar, the vertical reinforcing steel bar (11) is welded on the ring main reinforcement (10), and then the horizontal reinforcing steel bar (12) and the stirrup are bound.
Step seven: and (3) before the concrete sleeve (1) is poured, after the steel bar arrangement, the anchoring steel bar (4) arrangement, the template support and the like are checked to be qualified, carrying out concrete pouring construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210747339.2A CN114991557A (en) | 2022-06-28 | 2022-06-28 | Concrete strip foundation reinforced by additional concrete sleeve and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210747339.2A CN114991557A (en) | 2022-06-28 | 2022-06-28 | Concrete strip foundation reinforced by additional concrete sleeve and construction method thereof |
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| CN114991557A true CN114991557A (en) | 2022-09-02 |
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| CN202210747339.2A Pending CN114991557A (en) | 2022-06-28 | 2022-06-28 | Concrete strip foundation reinforced by additional concrete sleeve and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116220419A (en) * | 2023-02-17 | 2023-06-06 | 上海二十冶建设有限公司 | Construction method for reinforcing tower crane foundation by foundation expansion method |
-
2022
- 2022-06-28 CN CN202210747339.2A patent/CN114991557A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116220419A (en) * | 2023-02-17 | 2023-06-06 | 上海二十冶建设有限公司 | Construction method for reinforcing tower crane foundation by foundation expansion method |
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