CN114059791A - Method for reinforcing and heightening circular structure pool by prestressed concrete technology - Google Patents
Method for reinforcing and heightening circular structure pool by prestressed concrete technology Download PDFInfo
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- CN114059791A CN114059791A CN202111339483.4A CN202111339483A CN114059791A CN 114059791 A CN114059791 A CN 114059791A CN 202111339483 A CN202111339483 A CN 202111339483A CN 114059791 A CN114059791 A CN 114059791A
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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
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
- E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/122—Machines for joining reinforcing bars
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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
-
- 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
- E04G23/0225—Increasing or restoring the load-bearing capacity of building construction elements of circular building elements, e.g. by circular bracing
-
- 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
- E04G23/0266—Enlarging
-
- 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
- E04H4/00—Swimming or splash baths or pools
- E04H4/0075—Swimming or splash baths or pools made of concrete
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G2021/127—Circular prestressing of, e.g. columns, tanks, domes
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a method for reinforcing a heightened circular structure pool by a prestressed concrete technology, which comprises the following steps: a plurality of prestressed ring beams are arranged on the outer side of the original pool wall of the pool in a surrounding manner, a plurality of anchoring ribs extending along the vertical direction are arranged on the outer side of the original pool wall of the pool, a prestressed rib is arranged in each prestressed ring beam, and the tail end of each prestressed rib penetrates through the anchoring ribs; tensioning the prestressed tendons, anchoring the tail ends of the prestressed tendons to the anchoring ribs, and performing anticorrosion sealing treatment on the exposed parts of the prestressed tendons; and (5) constructing a heightening component, wherein the heightening component comprises a pool wall, a walkway plate, a central cylinder, a water outlet well and a mud outlet well which are heightened in situ. The invention obviously improves the stress condition of the circular water pool through smaller engineering quantity, thereby improving the bearing capacity of the circular water pool, realizing the effects of reinforcing and improving the processing capacity of the water pool, and being a circular water pool reinforcing and heightening transformation method with simple and reliable structure, convenient construction, small engineering quantity and smaller cost.
Description
Technical Field
The invention relates to a method for reinforcing a heightened round structure pool by a prestressed concrete technology. The method is suitable for upgrading and transforming projects of municipal sewage treatment plants in the field of water supply and drainage.
Background
With the ever-increasing significance of environmental protection, the country is increasing the effort to protect and improve the ecological environment, including improving the urban sewage treatment level, continuing to reduce the emission of COD and ammonia nitrogen, and other measures, which puts higher demands on the capacity of sewage treatment facilities, and thus a large amount of sewage treatment upgrading and reconstruction projects are developed nationwide. Because the existing sewage treatment facilities are limited by conditions such as sites, tank volumes and the like, and the demand of sewage treatment is difficult to meet, the structural water tank of the original sewage treatment facilities needs to be modified and expanded, which is the standard improvement project of the sewage treatment plant.
At present, the standard improvement project of a sewage treatment plant mostly adopts the modes of heightening the wall of the tank, adding a partition wall and the like to modify the operation process of a structure water tank, but the existing modification mode has the defects of complex construction process, slow project progress, high modification project cost, narrow construction surface, difficulty in construction and the like.
On the other hand, the structural water tank of some sewage treatment facilities still needs to keep normal operation when being reformed, which puts higher requirements on the reforming method, namely, the construction is needed under the condition of water, and the normal use and operation of the facilities cannot be influenced, so the traditional reforming method of additionally arranging partition walls, supporting columns and the like is difficult to use. Therefore, a pool transformation technology which is reliable in structure, convenient to construct and capable of meeting the requirements is required.
Disclosure of Invention
The invention provides a method for reinforcing a heightened circular structure pool by a prestressed concrete technology aiming at the limit requirements of the construction method and conditions on the above conditions, and the method can be used for reinforcing the heightened circular structure pool by water-carrying construction, and has the advantages of simple and reliable structure, convenient construction, fast progress and low cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a method for reinforcing a heightened circular structure pool by a prestressed concrete technology, which comprises the following steps:
and 3, constructing heightening members, wherein the heightening members comprise heightening members at original positions of the pool wall, the walkway plate, the central cylinder, the water outlet well and the mud outlet well.
Preferably, in the step 1, each circle of prestressed tendons is composed of a plurality of unbonded prestressed steel strands, and the unbonded prestressed steel strands of adjacent circles of prestressed tendons are arranged in a staggered manner.
Preferably, in the step 2, the prestressed tendons are tensioned after the concrete reaches 100% of the designed strength, wherein the tensioning sequence is from bottom to top, and the tensioning sequence is divided into two times, namely when the concrete reaches the strengths of C15 and C40.
Preferably, in the step 3, the heightening member construction has a chiseled part, the heightening member longitudinal rib is welded with the original member longitudinal rib, and the reinforcing steel bar is implanted into the original member at other positions; and (4) planting reinforcing steel bars on the original pool wall in the vertical direction at the hole plugging part, and welding the two sides of the hole plugging part with chiseled reinforcing steel bars of the pool wall.
Preferably, the steps areIn step 1, the size of the prestressed ring beam is 400mm multiplied by 400mm, the diameter of the prestressed steel strand is 15.24mm, and the ultimate strength standard value Fptk is 1860N/mm2。
Preferably, in the step 2, the tendon tensioning control stress σ con is 1300N/mm2And controlling the stress and strain in the tensioning process with the tensioning stress of 0-1.03 sigma con.
Preferably, four anchoring ribs are equidistantly arranged on the outer side of the original pool wall of the pool, and two ends of one prestressed tendon are respectively anchored on the two anchoring ribs which are opposite to each other.
Preferably, in the step 2, the step of performing the corrosion prevention sealing treatment on the exposed portion of the tendon further includes: the part of the prestressed tendon exposed out of the side face of the anchoring rib is anchored through a clamping piece anchorage device and an anchoring base plate, and after an anticorrosive coating is formed by brushing epoxy resin, micro-expansion fine stone concrete is poured.
The annular prestressed concrete structure is additionally arranged on the outer side of the pool wall of the circular pool, so that the annular tensile force applied to the pool wall can be resisted, the stress condition of the pool wall is improved, and the bearing capacity of the pool is improved; the construction of the reinforced part only needs to construct a ring beam and an anchoring rib outside the pool wall and tension the prestressed steel strands, and the reinforcement of the pool can be completed under the condition of not influencing the normal operation of the pool. The pond is directly heightened in the original position, reduces the engineering volume as far as possible, and new and old component connection adopts bar planting and chisels out partial steel bar welding process, has fully guaranteed the joint strength of newly-increased component and former component. Similarly, the construction of the heightened part can be completed under the condition of not influencing the normal operation of the pool.
The invention obviously improves the stress condition of the circular water pool through smaller engineering quantity, thereby improving the bearing capacity of the circular water pool, realizing the effects of reinforcing and improving the processing capacity of the water pool, and being a circular water pool reinforcing and heightening transformation method with simple and reliable structure, convenient construction, small engineering quantity and smaller cost.
Drawings
Fig. 1 is a plan view of the present embodiment.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a schematic structural diagram of the connection of the ring beam and the pool wall.
Fig. 4 is a schematic view of the connection of the anchoring rib to the pool wall.
Fig. 5 is a schematic diagram of anchoring of the prestressed steel strands.
Fig. 6 shows the placement of the prestressed steel strands.
Fig. 7 is a schematic diagram of corrosion prevention and sealing of the prestressed steel strand.
FIG. 8 is a schematic view of a mud well heightening process.
Fig. 9 is a schematic view of a process for heightening a walkway plate.
Fig. 10 is a schematic view of a process for heightening a center barrel.
FIG. 11 is a schematic view of hole plugging.
The figure is marked with: 1. a prestressed ring beam; 2. an anchor rib; 3. pre-stressed steel strands; 4. a tank wall; 5. a central barrel; 6. heightening the top of the pond; 7. the top of the original pool; 8. a clip anchor; 9. an anchor backing plate; 10. a spiral rib; 11. an anticorrosive layer; 12. micro-expanded fine aggregate concrete; 13. and (5) reinforcing steel bars.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The invention discloses a method for reinforcing a heightened circular structure pool by a prestressed concrete technology, which comprises the following steps:
The anchoring ribs 2 are equidistantly arranged on the outer side of the original pool wall of the pool, and two ends of one prestressed tendon are respectively anchored on the anchoring ribs 2 which are opposite to each other.
Specifically, in the step 1, each circle of prestressed tendons is composed of a plurality of unbonded prestressed steel strands 3, and the unbonded prestressed steel strands 3 of adjacent circles of prestressed tendons are arranged in a staggered manner.
The size of the prestressed ring beam 1 is 400mm multiplied by 400mm, the diameter of the prestressed steel strand is 15.24mm, and the ultimate strength standard value Fptk is 1860N/mm2。
And 2, tensioning the prestressed tendons, anchoring the tail ends of the prestressed tendons to the anchoring ribs 2, and performing anticorrosion sealing treatment on the exposed parts of the prestressed tendons.
The step of performing the anticorrosion sealing treatment on the exposed part of the prestressed tendon further comprises the following steps: the part of the prestressed tendon exposed out of the side surface of the anchoring rib 2 is provided with a spiral tendon 10 which is anchored by a clip anchorage 8 and an anchor backing plate 9, and after an anticorrosive coating 11 is formed by brushing epoxy resin, micro-expansion fine stone concrete 12 is poured.
Specifically, in the step 2, the prestressed tendons are tensioned after the concrete reaches 100% of the designed strength, the tensioning sequence is from bottom to top, and the tensioning is performed twice in total, namely when the concrete reaches the strengths of C15 and C40. The stretching control stress sigma con of the prestressed tendon is 1300N/mm2And controlling the stress and strain in the tensioning process with the tensioning stress of 0-1.03 sigma con.
And 3, constructing heightening members, wherein the heightening members comprise pool walls, walkway plates, central cylinders 5 and heightening members at original positions of water outlet wells or mud outlet wells.
As shown in fig. 8, 9 and 10, in step 3, a chiseled portion is formed during the construction of the heightening member, the vertical reinforcement of the heightening member is welded to the vertical reinforcement of the original member, and the reinforcing bars 13 are implanted into the original member at other positions. As shown in figure 11, the holes are sealed, and reinforcing bars are planted on the original pool wall in the vertical direction, and two sides of the holes are welded with the reinforcing bars 13 of the chiseled part of the pool wall.
The annular prestressed concrete structure is additionally arranged on the outer side of the pool wall of the circular pool, so that the annular tensile force applied to the pool wall can be resisted, the stress condition of the pool wall is improved, and the bearing capacity of the pool is improved; the construction of the reinforced part only needs to construct a ring beam and an anchoring rib outside the pool wall and tension the prestressed steel strands, and the reinforcement of the pool can be completed under the condition of not influencing the normal operation of the pool. The pond is directly heightened in the original position, reduces the engineering volume as far as possible, and new and old component connection adopts bar planting and chisels out partial steel bar welding process, has fully guaranteed the joint strength of newly-increased component and former component. Similarly, the construction of the heightened part can be completed under the condition of not influencing the normal operation of the pool.
The invention obviously improves the stress condition of the circular water pool through smaller engineering quantity, thereby improving the bearing capacity of the circular water pool, realizing the effects of reinforcing and improving the processing capacity of the water pool, and being a circular water pool reinforcing and heightening transformation method with simple and reliable structure, convenient construction, small engineering quantity and smaller cost.
Claims (8)
1. A method for reinforcing a heightened circular structure pool by a prestressed concrete technology is characterized by comprising the following steps:
step 1, a plurality of prestressed ring beams are arranged on the outer side of the original pool wall of the pool in a surrounding manner, a plurality of anchoring ribs extending along the vertical direction are arranged on the outer side of the original pool wall of the pool, a prestressed rib is arranged in each prestressed ring beam, and the tail end of each prestressed rib penetrates through the anchoring ribs;
step 2, tensioning the prestressed tendons, anchoring the tail ends of the prestressed tendons to the anchoring ribs, and performing anticorrosion sealing treatment on the exposed parts of the prestressed tendons;
and 3, constructing a heightening member, wherein the heightening member comprises a pool wall, a walkway plate, a central cylinder, a water outlet well or a heightening member at the original position of a mud outlet well.
2. The method for reinforcing a heightened round structure pool by using the prestressed concrete technology as claimed in claim 1, wherein in the step 1, each circle of prestressed tendons is composed of a plurality of unbonded prestressed steel strands, and the unbonded prestressed steel strands of the adjacent circles of prestressed tendons are arranged in a staggered manner.
3. The method for reinforcing a pool of elevated circular structures by using prestressed concrete technology as claimed in claim 1, wherein in said step 2, said prestressed reinforcement is tensioned after the concrete reaches 100% of the designed strength, the tensioning sequence is from bottom to top, and the tensioning sequence is divided into two times, respectively after the concrete reaches C15 and C40 strengths.
4. The method for reinforcing a heightened circular structure pool by the prestressed concrete technology as claimed in claim 1, wherein in the step 3, chiseling parts are arranged in the construction of the heightening member, the heightening member longitudinal ribs are welded with the original member longitudinal ribs, and reinforcing steel bars are implanted into the original member at other positions; and (4) planting reinforcing steel bars on the original pool wall in the vertical direction at the hole plugging part, and welding the two sides of the hole plugging part with chiseled reinforcing steel bars of the pool wall.
5. The method for reinforcing a heightened circular structure pool by using prestressed concrete technology as claimed in claim 2, wherein in the step 1, the dimensions of the prestressed ring beam are 400mm x 400mm, the diameter of the prestressed steel strand is 15.24mm, and the ultimate strength standard value Fptk is 1860N/mm2。
6. The method for reinforcing a pool of elevated circular structures by using prestressed concrete technology as claimed in claim 1, wherein in said step 2, the prestressed tendons stretch the controlled stress σcon＝1300N/mm2The tensile stress is 0-1.03 sigmaconThe tensioning process controls stress and strain.
7. The method as claimed in claim 1, wherein the four anchoring ribs are equally spaced from each other on the outer side of the original pool wall, and both ends of a tendon are anchored to the two anchoring ribs opposite to each other.
8. The method for reinforcing a pool of elevated circular structures by using prestressed concrete technology as claimed in claim 1, wherein said step 2 of performing anticorrosion sealing treatment on the exposed portion of the prestressed tendon further comprises: the part of the prestressed tendon exposed out of the side face of the anchoring rib is anchored through a clamping piece anchorage device and an anchoring base plate, and after an anticorrosive coating is formed by brushing epoxy resin, micro-expansion fine stone concrete is poured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111339483.4A CN114059791A (en) | 2021-11-12 | 2021-11-12 | Method for reinforcing and heightening circular structure pool by prestressed concrete technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111339483.4A CN114059791A (en) | 2021-11-12 | 2021-11-12 | Method for reinforcing and heightening circular structure pool by prestressed concrete technology |
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| CN114059791A true CN114059791A (en) | 2022-02-18 |
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| CN202111339483.4A Pending CN114059791A (en) | 2021-11-12 | 2021-11-12 | Method for reinforcing and heightening circular structure pool by prestressed concrete technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115162731A (en) * | 2022-06-16 | 2022-10-11 | 北京市政路桥股份有限公司 | Pool construction method based on prestress engineering |
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| CN103469817A (en) * | 2013-09-30 | 2013-12-25 | 中铁一局集团有限公司 | Existing subway station main structure broadening construction method |
| CN105378129A (en) * | 2013-04-08 | 2016-03-02 | Re-Fer股份公司 | Method for producing prestressed concrete structures by means of profiles made of shape memory alloys and structure produced according to said method |
| CN106760593A (en) * | 2016-11-23 | 2017-05-31 | 西南科技大学 | A kind of barnacle wall strengthens method |
| US20170314277A1 (en) * | 2014-12-18 | 2017-11-02 | Re-Fer Ag | Method for producing prestressed structures and structural parts by means of sma tension elements, and structure and structural part equipped therewith |
| CN212530853U (en) * | 2020-03-09 | 2021-02-12 | 合肥水泥研究设计院有限公司 | Reinforcement structure of a cement plant silo |
| CN212535187U (en) * | 2020-06-15 | 2021-02-12 | 江西聚闻工程技术有限公司 | Reinforcing apparatus of prestressed beam |
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2021
- 2021-11-12 CN CN202111339483.4A patent/CN114059791A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2768166A1 (en) * | 1997-09-11 | 1999-03-12 | Dominique Raymond Lu Quantinet | Concrete silo cell reinforcing method |
| CN101109227A (en) * | 2007-09-05 | 2008-01-23 | 中国建筑第七工程局 | Construction method of single-stride large cantilever double-pre-stress concrete steel concrete crossbeam |
| CN101575916A (en) * | 2008-05-08 | 2009-11-11 | 贵阳铝镁设计研究院 | Reinforcing mode for pool wall of pool |
| CN101761240A (en) * | 2008-12-23 | 2010-06-30 | 贵阳铝镁设计研究院 | Method and structure for adding partition in prior pool |
| CN102661056A (en) * | 2012-03-12 | 2012-09-12 | 河海大学 | Apparatus for underpinning reinforced concrete column by adopting prestress technology |
| CN105378129A (en) * | 2013-04-08 | 2016-03-02 | Re-Fer股份公司 | Method for producing prestressed concrete structures by means of profiles made of shape memory alloys and structure produced according to said method |
| CN103469817A (en) * | 2013-09-30 | 2013-12-25 | 中铁一局集团有限公司 | Existing subway station main structure broadening construction method |
| US20170314277A1 (en) * | 2014-12-18 | 2017-11-02 | Re-Fer Ag | Method for producing prestressed structures and structural parts by means of sma tension elements, and structure and structural part equipped therewith |
| CN106760593A (en) * | 2016-11-23 | 2017-05-31 | 西南科技大学 | A kind of barnacle wall strengthens method |
| CN212530853U (en) * | 2020-03-09 | 2021-02-12 | 合肥水泥研究设计院有限公司 | Reinforcement structure of a cement plant silo |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115162731A (en) * | 2022-06-16 | 2022-10-11 | 北京市政路桥股份有限公司 | Pool construction method based on prestress engineering |
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