CN113175123A - Hollow block structure reinforced by longitudinal and transverse prestressed anchor rods through pressure grouting and construction method thereof - Google Patents

Hollow block structure reinforced by longitudinal and transverse prestressed anchor rods through pressure grouting and construction method thereof Download PDF

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Publication number
CN113175123A
CN113175123A CN202110497708.2A CN202110497708A CN113175123A CN 113175123 A CN113175123 A CN 113175123A CN 202110497708 A CN202110497708 A CN 202110497708A CN 113175123 A CN113175123 A CN 113175123A
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China
Prior art keywords
prestressed anchor
longitudinal
wall body
anchor rod
wall
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CN202110497708.2A
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Chinese (zh)
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董有
鞠树森
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Beijing Zhufu International Anti Seismic Technology Co ltd
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Beijing Zhufu International Anti Seismic Technology Co ltd
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Priority to CN202110497708.2A priority Critical patent/CN113175123A/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
    • E04B2/14—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element
    • E04B2/16—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element using elements having specially-designed means for stabilising the position
    • E04B2/20—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element using elements having specially-designed means for stabilising the position by filling material with or without reinforcements in small channels in, or in grooves between, the elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
    • E04B2/14—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element
    • E04B2/26—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element the walls being characterised by fillings in all cavities in order to form a wall construction
    • 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
    • E04G23/0222—Replacing or adding wall ties
    • 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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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

The invention relates to a longitudinal and transverse prestressed anchor pressure grouting reinforced hollow block structure and a construction method thereof, wherein the structure comprises a wall body, a longitudinal prestressed anchor, a transverse prestressed anchor and a foundation; the wall body is of a concrete hollow block masonry structure, the foundation is a strip foundation under the wall, and the longitudinal prestressed anchor rods are vertically and uniformly inserted into the wall body; the upper end of the longitudinal prestressed anchor rod is anchored by adopting an anchorage device with a bolt, and the lower end of the longitudinal prestressed anchor rod is anchored in the foundation; a thin-wall steel pipe or a plastic pipe is sleeved on the longitudinal prestressed anchor rod, and mortar is poured between the thin-wall steel pipe or the plastic pipe and the concrete hollow building blocks of the wall body; the transverse prestressed anchor rod is arranged in the wall body after transverse drilling is carried out in the horizontal direction of the wall body, and anchorage devices with bolts are adopted at two ends for anchoring.

Description

Hollow block structure reinforced by longitudinal and transverse prestressed anchor rods through pressure grouting and construction method thereof
Technical Field
The invention relates to a pressure grouting reinforced hollow block structure adopting longitudinal and transverse prestressed anchor rods and a construction method thereof, belonging to the technical field of seismic reinforcement of existing buildings.
Background
The technology of adopting longitudinal and transverse through holes to put prestressed anchor rods for pressure grouting to perform earthquake reinforcement is a brand new earthquake reinforcement idea. The traditional method for seismic reinforcement outside a wall by adopting a prestress technology has great influence on the appearance, the structure and the construction process of an original structure. According to the technology, longitudinal and transverse prestressed anchor rods are arranged in the concrete hollow small-sized block masonry wall and are subjected to pressure grouting, then the steel bars are tensioned for anchoring, and the prestressed mortar anchor rods are formed for seismic reinforcement of the concrete hollow small-sized block masonry structure, so that wide application conditions are created for the method for seismic reinforcement of the masonry structure, and the prospect of practical application is shown.
Disclosure of Invention
The invention has proposed a and adopted the longitudinal, horizontal to put into the prestressed anchor pressure grouting and strengthen the hollow block structure and its construction method, namely adopt the longitudinal, horizontal to put into the prestressed anchor pressure grouting and carry on the method of anti-seismic reinforcement to the concrete hollow small-scale block masonry structure, mainly through putting into the longitudinal prestressed anchor in the concrete hollow block masonry wall, and carry on the pressure grouting, stretch-draw the steel reinforcement and carry on the anchorage; and transversely drilling a hole in the horizontal direction of the wall body, and putting in a prestressed anchor rod to form longitudinal and transverse prestressed mortar anchor rods for seismic reinforcement of the concrete hollow block masonry structure, wherein the prestressed longitudinal anchor rod is vertically and uniformly arranged, and each layer of bricks of the prestressed transverse anchor rod is drilled with the transverse anchor rod.
In order to achieve the purpose, the invention adopts the following technical scheme:
a adopts and puts into the prestressed anchor pressure grouting and strengthens the hollow block structure and its construction method longitudinally, including wall, longitudinal prestressed anchor, horizontal prestressed anchor, foundation; the wall body is of a concrete hollow block masonry structure, the foundation is a strip foundation under the wall, and the longitudinal prestressed anchor rods are vertically and uniformly inserted into the wall body; the upper end of the longitudinal prestressed anchor rod is anchored by adopting an anchorage device with a bolt, and the lower end of the longitudinal prestressed anchor rod is anchored in the foundation; a thin-wall steel pipe or a plastic pipe is sleeved on the longitudinal prestressed anchor rod, and mortar is poured between the thin-wall steel pipe or the plastic pipe and the concrete hollow building blocks of the wall body; the transverse prestressed anchor rod is arranged in the wall body after transverse drilling is carried out in the horizontal direction of the wall body, and anchorage devices with bolts are adopted at two ends for anchoring.
Furthermore, the longitudinal prestressed anchor rods and the transverse prestressed anchor rods are all phi 18-phi 20 prestressed anchor rods.
Further, the vertical arrangement interval of the longitudinal prestressed anchor rods is 400-600 mm.
Furthermore, the transverse prestressed anchor rod is drilled in each layer of building blocks in the horizontal direction of the wall body, the transverse prestressed anchor rod is placed in the transverse prestressed anchor rod, and anchorage devices with bolts are adopted at two ends of the transverse prestressed anchor rod for anchoring.
Furthermore, horizontal steel mesh sheets are arranged in the wall body every 5-6 layers of building blocks.
Furthermore, the horizontal reinforcing mesh is formed by welding phi 8 reinforcing steel bars.
Furthermore, an open trench is dug on the outer side of the foundation under the wall, an L-shaped opening is formed in the lower portion of the foundation along the vertical projection direction of the hole, the cross section of the L-shaped opening is rectangular, and the size of the cross section of the L-shaped opening is 600mm multiplied by 400 mm.
The hollow block structure reinforced by the prestressed anchor rods placed in the longitudinal direction and the transverse direction and pressure grouting and the construction method thereof adopt the following steps:
the method comprises the following steps: paying off a wall body needing to be reinforced by a mortar anchor rod according to a design drawing, vertically and uniformly arranging holes along the longitudinal wall direction, and determining the drilling position in the horizontal direction of the wall body;
step two: drilling each layer of building blocks in the horizontal direction of the wall body, placing a transverse prestressed anchor rod, tightening bolts of the transverse prestressed anchor rod by using a torque wrench to apply prestressed tension, and anchoring by using an anchorage device with bolts;
step three: excavating an open trench on the outer side of the foundation under the wall, and opening an L-shaped hole along the vertical projection direction of the hole;
step four: after being oiled, the longitudinal prestressed anchor rod is sleeved with a thin-wall steel pipe or a plastic pipe and inserted into the hole, and the longitudinal prestressed anchor rod is arranged in the wall body;
step five: adjusting the length of the longitudinal prestressed anchor rod to ensure that the lower end of the longitudinal prestressed anchor rod extends into the L-shaped hole, the anchoring length of the longitudinal prestressed anchor rod is not less than 700mm, and filling the hole with C35 concrete to anchor the lower end of the longitudinal prestressed anchor rod with the foundation;
step six: performing pressure grouting by adopting a pneumatic propulsion grouting machine, and grouting and compacting a gap between the concrete hollow block and the thin-wall steel pipe or the plastic pipe by using mortar;
step seven: and after the strength of the mortar reaches the designed strength, tightening the bolt at the upper end of the longitudinal prestressed anchor rod by using a torque wrench to apply prestressed tension, and anchoring by using an anchorage device with a bolt.
Has the advantages that:
the invention can effectively improve the crack resistance and shear resistance of the wall, inhibit the cracking of the wall, inhibit the development of cracks and improve the seismic resistance of the masonry structure, and particularly can effectively improve the seismic bearing capacity of the existing masonry building for seismic reinforcement.
Drawings
FIG. 1 is a structural plane layout diagram of a hollow block reinforced by vertically and horizontally placing prestressed anchor rods in pressure grouting;
fig. 2 is a sectional view taken along line a-a of fig. 1.
In the figure, 1 a wall body; 2 longitudinal prestressed anchor rods; 3, a transverse prestressed anchor rod; 4, foundation treatment; 5 thin-walled steel or plastic pipes; 6, horizontal reinforcing mesh sheets; 7, an anchorage device.
Detailed Description
A longitudinal and transverse prestressed anchor pressure grouting reinforced hollow block structure and a construction method thereof are adopted, as shown in figures 1-2, the hollow block structure comprises a wall body 1, a longitudinal prestressed anchor 2, a transverse prestressed anchor 3 and a foundation 4; the wall body 1 is a concrete hollow block masonry structure, the foundation 1 is a strip foundation under the wall, and the longitudinal prestressed anchor rods 2 are vertically and uniformly inserted into the wall body 1; the upper end of the longitudinal prestressed anchor rod 2 is anchored by adopting an anchorage device 7 with a bolt, and the lower end of the longitudinal prestressed anchor rod 2 is anchored in the foundation 4; a thin-wall steel pipe or plastic pipe 5 is sleeved on the longitudinal prestressed anchor rod 2, and mortar is poured between the thin-wall steel pipe or plastic pipe 5 and the concrete hollow building blocks of the wall body 1; the transverse prestressed anchor rods 3 are transversely drilled in the horizontal direction of the wall body 1 and then are placed into the wall body 1, and anchorage devices 7 with bolts are adopted at two ends for anchoring.
Furthermore, the longitudinal prestressed anchor rods 2 and the transverse prestressed anchor rods 3 are prestressed anchor rods with phi 18-phi 20.
Further, the vertical arrangement interval of the longitudinal prestressed anchor rods 2 is 400-600 mm.
Further, each layer of building blocks of the horizontal direction of the wall body 1 is drilled by the transverse prestressed anchor rods 3, the transverse prestressed anchor rods 3 are placed in, and anchorage devices 7 with bolts are adopted at two ends for anchoring.
Furthermore, horizontal steel mesh sheets 6 are arranged in the wall body 1 every 5-6 layers of building blocks.
Furthermore, the horizontal reinforcing mesh 6 is formed by welding phi 8 reinforcing steel bars.
Furthermore, an open trench is dug on the outer side of the foundation 4 under the wall, an L-shaped opening is formed in the lower portion of the vertical projection direction of the hole, the cross section of the L-shaped opening is rectangular, and the size of the cross section of the L-shaped opening is 600mm multiplied by 400 mm.
The hollow block structure reinforced by the prestressed anchor rods placed in the longitudinal direction and the transverse direction and pressure grouting and the construction method thereof adopt the following steps:
the method comprises the following steps: paying off a wall body needing to be reinforced by a mortar anchor rod according to a design drawing, vertically and uniformly arranging holes along the longitudinal wall direction, and determining the drilling position in the horizontal direction of the wall body 1;
step two: drilling each layer of building blocks in the horizontal direction of the wall body 1, placing a transverse prestressed anchor rod 3, tightening bolts of the transverse prestressed anchor rod 3 by using a torque wrench to apply prestressed tension, and anchoring by using an anchorage device 7 with bolts;
step three: an open trench is excavated on the outer side of the wall lower foundation 4, and an L-shaped hole is formed along the vertical projection direction of the hole;
step four: after being oiled, the longitudinal prestressed anchor rod 2 is sleeved with a thin-wall steel pipe or a plastic pipe 5 and is inserted into the hole, and the longitudinal prestressed anchor rod 2 is arranged in the wall body 1;
step five: adjusting the length of the longitudinal prestressed anchor rod 2 to ensure that the lower end of the longitudinal prestressed anchor rod 2 extends into the L-shaped hole, the anchoring length of the longitudinal prestressed anchor rod is not less than 700mm, and filling the hole with C35 concrete to anchor the lower end of the longitudinal prestressed anchor rod 2 to the foundation 4;
step six: performing pressure grouting by adopting a pneumatic propulsion grouting machine, and grouting and compacting a gap between the concrete hollow block and the thin-wall steel pipe or the plastic pipe by using mortar;
step seven: after the strength of the mortar reaches the designed strength, a torque wrench is used for screwing the bolt at the upper end of the longitudinal prestressed anchor rod 2 to apply prestressed tension, and an anchorage device 7 with a bolt is used for anchoring.
The invention relates to a concrete implementation mode of the hollow building block, which is not limited to the concrete implementation mode, and also provides two invention patents of 'a structure and a construction method for reinforcing the hollow building block by placing bamboo poles into vertical through holes through grouting' and 'a structure and a construction method for reinforcing the hollow building block by using wall-penetrating bolts'.

Claims (7)

1. A pressure grouting reinforced hollow block structure adopting longitudinal and transverse prestressed anchor rods and a construction method thereof are characterized in that: the wall comprises a wall body (1), a longitudinal prestressed anchor rod (2), a transverse prestressed anchor rod (3) and a foundation (4); the wall body (1) is of a concrete hollow block masonry structure, the foundation (1) is a strip foundation under the wall, and the longitudinal prestressed anchor rods (2) are vertically and uniformly inserted into the wall body (1); the upper end of the longitudinal prestressed anchor rod (2) is anchored by adopting an anchorage device (7) with a bolt, and the lower end of the longitudinal prestressed anchor rod (2) is anchored in the foundation (4); a thin-wall steel pipe or plastic pipe (5) is sleeved on the longitudinal prestressed anchor rod (2), and mortar is poured between the thin-wall steel pipe or plastic pipe (5) and the concrete hollow building blocks of the wall body (1); the transverse prestressed anchor rods (3) are transversely drilled in the horizontal direction of the wall body (1) and then are placed into the wall body (1), and anchorage devices (7) with bolts are adopted at two ends for anchoring; horizontal steel mesh sheets (6) are arranged in the wall body (1) every 5-6 layers of building blocks.
2. The method as claimed in claim 1, wherein the hollow block structure is reinforced by vertically and horizontally putting in prestressed anchor rods and pressure grouting, and the construction method comprises the following steps: the longitudinal prestressed anchor rods (2) and the transverse prestressed anchor rods (3) are all phi 18-phi 20 prestressed anchor rods.
3. The method as claimed in claim 1, wherein the hollow block structure is reinforced by vertically and horizontally putting in prestressed anchor rods and pressure grouting, and the construction method comprises the following steps: the vertical arrangement interval of the longitudinal prestressed anchor rods (2) is 400-600 mm.
4. The method as claimed in claim 1, wherein the hollow block structure is reinforced by vertically and horizontally putting in prestressed anchor rods and pressure grouting, and the construction method comprises the following steps: and the transverse prestressed anchor rods (3) are drilled in each layer of building blocks in the horizontal direction of the wall body (1), the transverse prestressed anchor rods (3) are placed in the transverse prestressed anchor rods, and anchorage devices (7) with bolts are adopted at two ends for anchoring.
5. The method as claimed in claim 1, wherein the hollow block structure is reinforced by vertically and horizontally putting in prestressed anchor rods and pressure grouting, and the construction method comprises the following steps: the horizontal reinforcing mesh (6) is formed by welding phi 8 reinforcing steel bars.
6. The method as claimed in claim 1, wherein the hollow block structure is reinforced by vertically and horizontally putting in prestressed anchor rods and pressure grouting, and the construction method comprises the following steps: an open trench is dug on the outer side of the foundation (4) under the wall, an L-shaped opening is formed in the lower portion of the vertical projection direction of the hole, the cross section of the L-shaped opening is rectangular, and the size of the cross section of the L-shaped opening is 600mm multiplied by 400 mm.
7. The method for reinforcing hollow block structure by means of longitudinal and transverse prestressed anchor pressure grouting according to claims 1-6, characterized in that: the method comprises the following specific steps:
the method comprises the following steps: paying off a wall body needing to be reinforced by a mortar anchor rod according to a design drawing, vertically and uniformly arranging holes along the longitudinal wall direction, and determining the drilling position in the horizontal direction of the wall body (1);
step two: drilling each layer of building blocks in the horizontal direction of the wall body (1), placing a transverse pre-stressed anchor rod (3), tightening bolts of the transverse pre-stressed anchor rod (3) by using a torque wrench to apply pre-stress tension, and anchoring by using an anchorage device (7) with bolts;
step three: an open trench is excavated on the outer side of the wall lower foundation (4), and an L-shaped hole is formed along the vertical projection direction of the hole;
step four: after being oiled, the longitudinal prestressed anchor rod (2) is sleeved with a thin-wall steel pipe or a plastic pipe (5) and is inserted into the hole, and the longitudinal prestressed anchor rod (2) is arranged in the wall body (1);
step five: adjusting the length of the longitudinal prestressed anchor rod (2) to ensure that the lower end of the longitudinal prestressed anchor rod is deeply inserted into the L-shaped hole, the anchoring length of the longitudinal prestressed anchor rod is not less than 700mm, and filling the hole with C35 concrete to anchor the lower end of the longitudinal prestressed anchor rod (2) and the foundation (4);
step six: performing pressure grouting by adopting a pneumatic propulsion grouting machine, and grouting and compacting a gap between the concrete hollow block and the thin-wall steel pipe or plastic pipe (5) by using mortar;
step seven: after the strength of the mortar reaches the designed strength, a torque wrench is used for screwing the bolt at the upper end of the longitudinal prestressed anchor rod (2) to apply prestressed tensioning, and an anchorage device (7) with a bolt is used for anchoring.
CN202110497708.2A 2021-05-07 2021-05-07 Hollow block structure reinforced by longitudinal and transverse prestressed anchor rods through pressure grouting and construction method thereof Pending CN113175123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110497708.2A CN113175123A (en) 2021-05-07 2021-05-07 Hollow block structure reinforced by longitudinal and transverse prestressed anchor rods through pressure grouting and construction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110497708.2A CN113175123A (en) 2021-05-07 2021-05-07 Hollow block structure reinforced by longitudinal and transverse prestressed anchor rods through pressure grouting and construction method thereof

Publications (1)

Publication Number Publication Date
CN113175123A true CN113175123A (en) 2021-07-27

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