CN115506596A - Quality control method for post-tensioned pre-stressed beam construction - Google Patents
Quality control method for post-tensioned pre-stressed beam construction Download PDFInfo
- Publication number
- CN115506596A CN115506596A CN202210645785.2A CN202210645785A CN115506596A CN 115506596 A CN115506596 A CN 115506596A CN 202210645785 A CN202210645785 A CN 202210645785A CN 115506596 A CN115506596 A CN 115506596A
- Authority
- CN
- China
- Prior art keywords
- supplementing
- slurry
- grouting
- cylinder
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a quality control method for post-tensioned pre-stressed beam construction, which comprises the following steps: step 1: optimizing the mixing proportion of grouting cement; step 2: performing secondary pulp supplement; in order to ensure the stability of the secondary grout supplementing pipe, the cylinder drives the telescopic adjusting rod to move so as to realize the angle adjustment of the telescopic adjusting rod, then the secondary grout supplementing pipe is held by the stable bracket to improve the stability, in the grout supplementing process, the forward and reverse motors still drive the grout supplementing barrel to swing back and forth at a small angle so as to realize swinging type feeding, and because a gap exists between the stable bracket and the secondary grout supplementing pipe, the swinging process cannot influence the stability of the secondary grout supplementing pipe, so that the gap can be completely filled with materials in a grouting hole. And step 3: and (4) opening a pump to stretch strictly according to the reading of the oil pressure gauge in the prestress stretching process. The invention has the beneficial effects that: the method is scientific and reasonable, the structure of the prestressed beam is improved in time, and the grouting rate is improved; and the construction qualified rate is ensured.
Description
Technical Field
The invention relates to the field of building construction, in particular to a quality control method for post-tensioned pre-stressed beam construction.
Background
In the existing construction post-tensioning method bonding prestress engineering, the qualification rate of the post-tensioning method bonding prestress is only 80%, the on-site investigation of the problems is carried out, the following problems are found, the reading deviation of a tension oil gauge and the accumulated frequency of the non-compact prestressed beam grouting reaches 75%, the grouting cement mixing ratio does not meet the requirements, and the acceptance qualification rate is influenced.
Disclosure of Invention
In order to solve the problems, the invention discloses a quality control method for post-tensioned pre-stressed beam construction, which is scientific and reasonable, improves the structure of the pre-stressed beam in time and ensures the construction qualified rate.
The quality control method for post-tensioned pre-stressed beam construction comprises the following steps:
step 1: optimizing the mixing proportion of grouting cement;
step 2: performing secondary pulp supplement;
and step 3: and (4) opening a pump to stretch strictly according to the calculated oil pressure gauge reading in the prestress stretching process.
In the step 1, the grouting concrete is designed according to the compactness after grouting, the fluidity and the strength of the grouting cement, and the designed grouting cement has the following mixing ratio: cement: concrete admixture JM-3=0.45:1:0.05.
the invention further improves that: the step 2 comprises the following steps:
step 2.1: after the first pressure grouting, maintaining the pressure at 0.6MPa, and performing secondary artificial grout supplement within 4 hours;
step 2.2: inputting the secondary artificial grout supplementing into a secondary grout supplementing pipe from a grouting hole; wherein, the cement slurry in the secondary slurry supplementing pipe is supplemented through the slurry supplementing device until the grouting hole discharges the cement slurry.
The invention further improves that: the slurry supplementing device comprises a slurry supplementing trolley, a forward and reverse rotating motor, a slurry supplementing cylinder, a slurry supplementing pump and a stirring motor; the positive and negative rotation motor is fixed on the slurry supplementing trolley; wherein the output shaft of the positive and negative rotation motor is connected with a rotating platform; the slurry supplementing cylinder is fixed on the rotating platform; wherein the top of the slurry supplementing cylinder is provided with a stirring motor; wherein the stirring motor is connected with a stirring shaft in the slurry supplementing cylinder; a limiting rod is arranged on an output shaft of the forward and reverse rotating motor; wherein, travel switches are arranged at two ends of the limiting rod; the slurry supplementing trolley is respectively provided with a limiting block matched with the travel switch, and the forward and reverse rotating motors are driven to realize 5-10 by matching between the travel switch and the limiting block. Reciprocating rotation of the rotary shaft; the bottom of the slurry supplementing cylinder is externally connected with a slurry supplementing pump; the slurry supplementing pump is connected with a secondary slurry supplementing pipe.
The invention is further improved in that: a stabilizing tool is arranged on the side edge of the slurry supplementing trolley and comprises a supporting platform, a cylinder, a telescopic adjusting rod and a stabilizing bracket; the cylinder is fixed on the supporting platform; one end of the telescopic adjusting rod is rotatably arranged on the slurry supplementing trolley, and the other end of the telescopic adjusting rod is connected with a stable bracket; a cylinder shaft on the cylinder is connected with the telescopic adjusting rod; wherein the secondary slurry supplementing pipe is positioned in the stable bracket; wherein a gap is arranged between the stabilizing bracket and the secondary grout supplementing pipe.
The optimized grouting cement is fed into the grout supplementing cylinder, the stirring shaft is driven by the stirring motor to move, the grouting cement in the grout supplementing cylinder is stirred in time, and meanwhile, the forward and reverse rotating motor drives the rotating platform to achieve 5-10% by utilizing the matching between the travel switch and the limiting block. The materials in the barrel are uniformly mixed by the swing of the back and forth angle; then, feeding grouting liquid into a secondary grouting pipe by using a fluid infusion pump and feeding the grouting liquid into a grouting hole;
in order to ensure the stability of the secondary grout supplementing pipe, the cylinder drives the telescopic adjusting rod to move so as to realize the angle adjustment of the telescopic adjusting rod, then the secondary grout supplementing pipe is held by the stable bracket to improve the stability, in the grout supplementing process, the forward and reverse motors still drive the grout supplementing barrel to swing back and forth at a small angle so as to realize swinging type feeding, and because a gap exists between the stable bracket and the secondary grout supplementing pipe, the swinging process cannot influence the stability of the secondary grout supplementing pipe, so that the gap can be completely filled with materials in a grouting hole.
A supporting rod is arranged on the slurry supplementing trolley; the top of the supporting rod is provided with a universal bearing; wherein the universal bearing is in sliding fit with the bottom of the rotating platform; the stability of the rotation of the supporting platform is ensured.
The invention is further improved in that: the bottom of the slurry supplementing cylinder is arranged in a limiting ring of the rotating platform, so that the limiting is realized, and the position of the slurry supplementing cylinder can not be displaced when the rotating platform operates.
The invention further improves that: in the step 3, a tensile elongation value is adopted for rechecking; and controlling stress, and checking a tension elongation value.
The invention has the beneficial effects that: the method is scientific and reasonable, the structure of the prestressed girder is improved in time, and the grouting rate is improved; and the construction qualified rate is ensured.
Drawings
FIG. 1, a process flow diagram of the present invention;
FIG. 2 is a schematic structural view of a slurry replenishing device;
list of reference numerals:
wherein 1, a pulp supplementing trolley; 2-a positive and negative rotation motor; 3-a pulp supplementing cylinder; 4-slurry supplement pump; 5-a stirring motor; 6-rotating the platform; 7-a stirring shaft; 8-a limiting rod; 9-a travel switch; 10-a limiting block; 11-a support platform; 12-a cylinder; 13-telescopic adjusting rod; 14-stabilizing the bracket; 15-support rods; 16-universal bearings; 17-a limit ring; 18-secondary slurry supplementing pipe; 19-grouting holes.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and detailed description, which will be understood as being illustrative only and not limiting in scope. It should be noted that as used in the following description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
The salt city high and new technology industrial area develops mansion engineering, is located in the west area of salt city area, is at the east and north sides of the intersection of the century great road and the Xingxing road, and is convenient for traffic. The total building area is 46711 square meters, the total height of the building is 91.25m, four layers of skirt houses, one underground layer and nineteen above ground layers. The three-layer floor of the skirt building and the roof adopt a post-tensioning method to bond prestressed beams, the span is 24.8m, 4-615.24 steel strands are matched, 1860-level low-relaxation prestressed steel strands are adopted as prestressed tendons, the tensioning control stress sigma con =0.75 multiplied 1860=1395n/mm2, and the concrete strength grade is C40.
The quality control method for post-tensioned prestressed beam construction in the embodiment comprises the following steps:
step 1: optimizing the mixing proportion of grouting cement; the grouting material is designed according to the compactness after grouting, the fluidity and the strength of grouting cement, and the designed grouting cement has the following mixing ratio: cement: concrete admixture JM-3=0.45:1:0.05.
step 2: performing secondary pulp supplement; the quality control method for the construction of the tension prestressed beam comprises the following steps in the step 2:
step 2.1: after the first pressure grouting, maintaining the pressure at 0.6MPa, and performing secondary manual grout supplement within 4 hours;
step 2.2: inputting the secondary artificial grout supplementing into the secondary grout supplementing pipe from the grouting hole; wherein, the cement slurry in the secondary slurry supplementing pipe is supplemented through the slurry supplementing device until the grouting hole discharges the cement slurry.
The slurry supplementing device comprises a slurry supplementing trolley 1, a forward and reverse rotating motor 2, a slurry supplementing cylinder 3, a slurry supplementing pump 4 and a stirring motor 5; the positive and negative rotation motor 2 is fixed on the slurry supplementing trolley 1; wherein, the output shaft of the positive and negative rotation motor 2 is connected with a rotating platform 6; the slurry supplementing cylinder 3 is fixed on the rotating platform 6; wherein the top of the slurry supplementing cylinder 3 is provided with a stirring motor 5; wherein the stirring motor 5 is connected with a stirring shaft 7 in the slurry supplementing cylinder 3; a limiting rod 8 is arranged on an output shaft of the forward and reverse rotating motor 2; wherein, two ends of the limiting rod 8 are provided with travel switches 9; the slurry supplementing trolley 1 is respectively provided with a limit block 10 matched with the travel switch 9, and the forward and reverse rotating motor 2 is driven to realize reciprocating rotation of 5-10 degrees through the matching between the travel switch 9 and the limit block 10; the bottom of the slurry supplementing cylinder 3 is externally connected with a slurry supplementing pump 4; the slurry supplementing pump 4 is connected with a secondary slurry supplementing pipe 18; the slurry supplementing trolley 1 is provided with a support rod 15; the top of the support rod 15 is provided with a universal bearing 16; wherein the universal bearing 16 is matched with the bottom of the rotating platform 6 in a sliding way; the bottom of the slurry supplementing cylinder 3 is arranged in a limiting ring 17 of the rotating platform 6.
A stabilizing tool is arranged on the side edge of the slurry supplementing trolley 1, and the stabilizing tool comprises a supporting platform 11, an air cylinder 12, a telescopic adjusting rod 13 and a stabilizing bracket 14; the cylinder 12 is fixed on the supporting platform 11; one end of a telescopic adjusting rod 13 is rotatably arranged on the slurry supplementing trolley 1, and the other end of the telescopic adjusting rod is connected with a stable bracket 14; a cylinder shaft on the cylinder 12 is connected with the telescopic adjusting rod 13; wherein the secondary grout supplying pipe 18 is positioned in the stabilizing bracket 14; wherein a gap is arranged between the stabilizing bracket 14 and the secondary grout pipe 18.
The optimized grouting cement is fed into the grout supplementing cylinder 3, then the stirring shaft 7 is driven by the stirring motor 5 to move, the grouting cement in the grout supplementing cylinder 3 is stirred in time, and meanwhile, the forward and reverse rotating motor 2 drives the rotating platform 6 to realize 5-10 by utilizing the matching between the travel switch 9 and the limiting block 10. The materials in the barrel are uniformly mixed by the swing of the back and forth angle; then, the grouting liquid is sent into a secondary grouting pipe 18 and then sent into a grouting hole 19 by using a fluid infusion pump 4; in order to ensure the stability of the secondary grout supplementing pipe, the cylinder 12 drives the telescopic adjusting rod 13 to move so as to realize the angle adjustment of the telescopic adjusting rod, then the stable bracket 14 supports the secondary grout supplementing pipe 18 to improve the stability, in the grout supplementing process, the forward and reverse motor 2 still drives the grout supplementing barrel 1 to swing back and forth at a small angle so as to realize swing type feeding, and because a gap exists between the stable bracket and the secondary grout supplementing pipe, the stability of the secondary grout supplementing pipe cannot be influenced in the swinging process, so that the gap can be completely filled with the grout in the grouting hole.
And step 3: opening a pump to stretch strictly according to the calculated oil pressure meter reading in the prestress stretching process; rechecking by adopting a tension elongation value; and controlling stress, and checking a tension elongation value.
By the quality control method, the construction quality of the post-tensioned prestressed beam is effectively improved, under the condition of supervision, the prestressed beam is subjected to tracking inspection in the construction process of three-layer floors and roofs of the engineering skirt building, the position 100 and the position 2 which are unqualified are inspected together, the primary qualified rate reaches 98%, and the expected effect is achieved. The inspection result shows that the construction quality of the prestressed beam is good, and the preset target of 98% is achieved.
The technical means disclosed in the scheme of the invention are not limited to the technical means disclosed in the above embodiments, but also include the technical means formed by any combination of the above technical features.
Claims (8)
1. The quality control method for post-tensioned pre-stressed beam construction is characterized by comprising the following steps: the method comprises the following steps:
step 1: optimizing the grouting cement mixing proportion;
and 2, step: performing secondary pulp supplement;
and 3, step 3: and (4) opening a pump to stretch strictly according to the calculated oil pressure gauge reading in the prestress stretching process.
2. The quality control method for post-tensioned prestressed beam construction as recited in claim 1, wherein: in the step 1, the grouting concrete is designed according to the compactness after grouting, the fluidity and the strength of the grouting cement, and the designed grouting cement has the following mixing ratio: cement: concrete admixture JM-3=0.45:1:0.05.
3. the quality control method for the construction of the beam with the tensile prestress according to claim 1, wherein: the step 2 comprises the following steps:
step 2.1: after the first pressure grouting, maintaining the pressure at 0.6MPa, and performing secondary manual grout supplement within 4 hours;
step 2.2: inputting the secondary artificial grout supplementing into the secondary grout supplementing pipe from the grouting hole; and the cement slurry in the secondary slurry supplementing pipe is supplemented through the slurry supplementing device until the grouting hole discharges the cement slurry.
4. The quality control method for the construction of the beam with the tensile prestress according to claim 3, wherein: the slurry supplementing device comprises a slurry supplementing trolley (1), a forward and reverse rotating motor (2), a slurry supplementing cylinder (3), a slurry supplementing pump (4) and a stirring motor (5); the positive and negative rotation motor (2) is fixed on the slurry supplementing trolley (1); wherein the output shaft of the positive and negative rotation motor (2) is connected with a rotating platform (6); the slurry supplementing cylinder (3) is fixed on the rotating platform (6); wherein the top of the slurry supplementing cylinder (3) is provided with a stirring motor (5); wherein the stirring motor (5) is connected with a stirring shaft (7) in the slurry supplementing cylinder (3); a limiting rod (8) is arranged on an output shaft of the forward and reverse rotating motor (2); wherein, travel switches (9) are arranged at two ends of the limiting rod (8); the pulp supplementing trolley (1) is provided with limit blocks (10) matched with the travel switches (9), and the forward and reverse rotating motor (2) is driven to realize reciprocating rotation at an angle of 5-10 degrees through the matching between the travel switches (9) and the limit blocks (10); the bottom of the slurry supplementing cylinder (3) is externally connected with a slurry supplementing pump (4); the slurry supplementing pump (4) is connected with a secondary slurry supplementing pipe (18).
5. The quality control method for the construction of the tensioned prestressed beam as recited in claim 3, wherein: a stabilizing tool is arranged on the side edge of the slurry supplementing trolley (1), and the stabilizing tool comprises a supporting platform (11), an air cylinder (12), a telescopic adjusting rod (13) and a stabilizing bracket (14); the cylinder (12) is fixed on the supporting platform (11); one end of a telescopic adjusting rod (13) is rotatably arranged on the grout supplementing trolley (1), and the other end of the telescopic adjusting rod is connected with a stable bracket (14); a cylinder shaft on the cylinder (12) is connected with the telescopic adjusting rod (13); wherein the secondary grout-filling pipe (18) is positioned in the stable bracket (14); wherein a gap is reserved between the stabilizing bracket (14) and the secondary grout supplementing pipe (18).
6. The quality control method for the construction of the tensioned prestressed beam as recited in claim 3, wherein: a supporting rod (15) is arranged on the pulp supplementing trolley (1); the top of the support rod (15) is provided with a universal bearing (16); wherein the universal bearing (16) is in sliding fit with the bottom of the rotating platform (6).
7. The quality control method for the construction of the tensioned prestressed beam as recited in claim 3, wherein: the bottom of the slurry supplementing cylinder (3) is arranged in a limiting ring (17) of the rotating platform (6).
8. The quality control method for the construction of the tensioned prestressed beam as recited in claim 1, wherein: in the step 3, rechecking is carried out by adopting a tension elongation value; and controlling stress, and checking a tension elongation value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210645785.2A CN115506596A (en) | 2022-06-09 | 2022-06-09 | Quality control method for post-tensioned pre-stressed beam construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210645785.2A CN115506596A (en) | 2022-06-09 | 2022-06-09 | Quality control method for post-tensioned pre-stressed beam construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115506596A true CN115506596A (en) | 2022-12-23 |
Family
ID=84500610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210645785.2A Pending CN115506596A (en) | 2022-06-09 | 2022-06-09 | Quality control method for post-tensioned pre-stressed beam construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115506596A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1339221A1 (en) * | 1985-12-23 | 1987-09-23 | Трест Организации И Технологии Сельского Строительства "Молдоргтехсельстрой" | Apparatus for plastering surfaces |
| CN111794221A (en) * | 2020-06-28 | 2020-10-20 | 中国水利水电第四工程局有限公司 | Prestressed anchor cable construction method |
| CN112033734A (en) * | 2020-09-16 | 2020-12-04 | 贵州工程应用技术学院 | High-precision in-service concrete strength rapid detection equipment |
| CN112796525A (en) * | 2021-02-05 | 2021-05-14 | 中南建设（南通）建筑产业有限公司 | Secondary slurry supplementing device and method for slurry outlet of wallboard sleeve |
| CN215564516U (en) * | 2021-02-07 | 2022-01-18 | 中南建设（南通）建筑产业有限公司 | Joint filling device for secondary slurry filling of slurry outlet of wallboard sleeve |
-
2022
- 2022-06-09 CN CN202210645785.2A patent/CN115506596A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1339221A1 (en) * | 1985-12-23 | 1987-09-23 | Трест Организации И Технологии Сельского Строительства "Молдоргтехсельстрой" | Apparatus for plastering surfaces |
| CN111794221A (en) * | 2020-06-28 | 2020-10-20 | 中国水利水电第四工程局有限公司 | Prestressed anchor cable construction method |
| CN112033734A (en) * | 2020-09-16 | 2020-12-04 | 贵州工程应用技术学院 | High-precision in-service concrete strength rapid detection equipment |
| CN112796525A (en) * | 2021-02-05 | 2021-05-14 | 中南建设（南通）建筑产业有限公司 | Secondary slurry supplementing device and method for slurry outlet of wallboard sleeve |
| CN215564516U (en) * | 2021-02-07 | 2022-01-18 | 中南建设（南通）建筑产业有限公司 | Joint filling device for secondary slurry filling of slurry outlet of wallboard sleeve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102383418B (en) | Anti-seismic prefabricated concrete solid square pile and production method thereof | |
| CN106436569B (en) | A kind of prestressing force bridge floor attachment means and its method for prefabricating and construction method | |
| CN106758786B (en) | A kind of prefabricated assembled concrete-filled double skin steel tube lattice bridge pier | |
| CN101831875A (en) | Precast assembly process of prestressed concrete cylindrical hollow pier | |
| CN207194146U (en) | Prestressing force assembly concrete frame joint attachment structure | |
| CN109610314B (en) | Prefabricated bridge deck wet joint structure and assembling method | |
| CN210507142U (en) | Positioning adjustment device for concrete assembled bridge pier | |
| CN110206143A (en) | A kind of construction method of post-stressed assembly concrete frame structure | |
| CN202000251U (en) | Cylindrical hollow prefabricated prestressed concrete pier structure | |
| CN209443571U (en) | A kind of large span fabricated construction self-balancing tenon-prestressing combination connecting node | |
| CN108842591A (en) | Configure the precast segment T beam bridge construction and construction method of internal external pre-stress bundle | |
| CN109235637A (en) | A kind of large span fabricated construction self-balancing tenon-prestressing combination connecting node | |
| CN104831833A (en) | Assembly type shear wall structure by connecting prestress rough surface seams | |
| CN204662711U (en) | A kind of prestressing force hair side seam is linked and packed formula shear wall structure | |
| CN201924289U (en) | Bracket structure for 0# block of high-pier long-span continuous rigid frame bridge | |
| CN115506596A (en) | Quality control method for post-tensioned pre-stressed beam construction | |
| CN210482018U (en) | Pier is assembled to concrete | |
| CN212103636U (en) | Hollow pier is assembled in prefabrication based on UHPC seam | |
| CN85202839U (en) | Assembled prefabricated components made of reinforced concrete | |
| CN113897848B (en) | Grouting reinforcement construction method for old concrete pavement void slab | |
| CN206174293U (en) | Prefabricated constructional column | |
| CN206368308U (en) | Pre-stress type levelling prefabrication and assembly construction concrete | |
| CN1186509C (en) | Post-stretching prestressed concrete arch bar roof and its construction method | |
| CN211472128U (en) | Continuity combination beam | |
| CN113565212A (en) | Connecting structure of steel frame modular building foundation and prefabricated formwork bearing platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |