CN114876054B - Construction technology for improving quality of stiff concrete conversion layer - Google Patents
Construction technology for improving quality of stiff concrete conversion layer Download PDFInfo
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- CN114876054B CN114876054B CN202210544170.0A CN202210544170A CN114876054B CN 114876054 B CN114876054 B CN 114876054B CN 202210544170 A CN202210544170 A CN 202210544170A CN 114876054 B CN114876054 B CN 114876054B
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- 238000010276 construction Methods 0.000 title claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 22
- 238000005516 engineering process Methods 0.000 title description 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 80
- 239000010959 steel Substances 0.000 claims abstract description 80
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000008569 process Effects 0.000 claims abstract description 21
- 239000010410 layer Substances 0.000 claims description 31
- 238000009434 installation Methods 0.000 claims description 17
- 238000003466 welding Methods 0.000 claims description 12
- 239000011241 protective layer Substances 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 6
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004886 process control Methods 0.000 abstract description 3
- 238000012797 qualification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000000051 modifying effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/16—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
-
- 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
- E04G21/14—Conveying or assembling building 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a construction process for improving the quality of a stiff concrete conversion layer, which aims at solving the problems of position deviation of reserved holes of a steel column, mounting position deviation of longitudinal ribs of a stiff concrete beam and position deviation of holes of the steel column, has strong pertinence, strict process control, good rectifying effect, improved working efficiency and construction period saving.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction process for improving the quality of a stiff concrete conversion layer.
Background
The steel member is used as a stiff framework to be wrapped in concrete, so that the steel member has the advantages of large span, high rigidity, high strength and the like, but the construction difficulty is also large, and the biggest problem is that the deviation of the position of a reserved hole of a steel column and the deviation of the installation position of a longitudinal rib of a stiff concrete beam occur, so that the construction quality cannot be guaranteed, and the improvement is urgently needed.
Disclosure of Invention
In order to solve the problems, the invention discloses a construction process for improving the quality of a stiff concrete conversion layer, which has the advantages of strong pertinence, strict process control, good rectifying effect, improved working efficiency and construction period saving.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a construction process for improving the quality of a stiff concrete conversion layer comprises the following steps:
s1: installing prefabricated section steel columns, section steel beams and connecting section steel in place, and welding a shaping steel frame;
s2: binding steel bars at the outer side of the section steel frame and the beam column joint area;
s3: pouring concrete, and curing and forming.
Further, in order to prevent the installation deviation, the following measures are taken in the installation of the steel column in the step S1:
s11: after the profile steel column is manufactured and molded in a factory, a central line is lapped on flange plates at two ends of the profile steel column and is used as a mark for controlling the axis and the verticality during installation, and beam column section numbers are all numbered during factory delivery so as to be convenient to install; the fillet welds of the upper flange plate and the lower flange plate are welded by adopting two welders at the opposite symmetrical positions along the same direction by adopting the same current and the same welding speed, so that the purpose of controlling deformation is achieved;
s12, elevation control
According to the design requirement, determining the elevation of the installed profile steel column, determining the elevation and deviation of the installed profile steel column, adjusting the elevation according to the length of the profile steel column to be installed, and adjusting the gap between column heads by using a steel gasket;
s13, verticality and deflection control
Drawing column shaft center lines on two flange plates perpendicular to each other of the steel column, observing from different directions by using two theodolites according to floor axes, adjusting and controlling the verticality and deflection by using a cable rope, measuring the vertical deflection of the installed steel column, adjusting, reserving the inclination amount, and counteracting the inclination amount by means of deformation in the installation and welding process;
s14, rechecking
The installation accuracy of the profile steel column is directly related to the construction of the frame beam, the construction is strictly controlled, the adjustment is rechecked layer by layer, and the error accumulation is prevented. After rechecking is qualified, fixing a cable rope, screwing up the lug plate by using a connecting plate, and loosening a hook of a tower crane for welding;
s15, correcting the bottom elevation, the verticality, the axis and the span of the steel beam to enable the steel beam to meet the design requirements.
Furthermore, the deviation of the steel column is controlled within +/-2 mm, so that the requirement is met.
Further, in the process of binding the steel bars in step S2, the solution method for the deviation of the longitudinal bar row spacing of the section steel beam comprises the following steps: during construction, the accurate position of the longitudinal bar is marked on the stirrup, and when the binding error of a worker exceeds the standard, the position is adjusted in time.
Furthermore, the row spacing deviation of all the section steel beams on site is controlled within +/-2 mm, so that the requirements are met.
Furthermore, before the concrete is poured in step S3, in order to prevent the deviation of the longitudinal rib protection layer of the section steel beam, a novel protection layer cushion block needs to be manufactured, so that the installation is ensured to be in place.
Furthermore, the allowable deviation of the thickness of the protective layer of all the section steel beams on site is controlled within +/-2 mm, so that the requirements are met.
Further, novel protective layer cushion includes base, backing plate and locating piece, the backing plate sets up between base and locating piece, the locating piece is the sunken square structure in middle part, and four sides of locating piece are equipped with the circular arc of same size, and the central part in the sunken district in locating piece middle part is less than the height of circular arc lower limb, and the locating piece back is equipped with two location blind holes, be equipped with the connecting hole that matches with the location blind hole on the backing plate, the base upper surface is equipped with the locating pin that matches with location blind hole, connecting hole.
As an improvement of the invention, the number of the backing plates is more than or equal to 1.
As a modification of the invention, the thickness of the backing plate is 2-4mm.
The beneficial effects of the invention are as follows:
according to the construction process for improving the quality of the stiff concrete conversion layer, disclosed by the invention, the countermeasures are formulated aiming at main reasons influencing the qualification rate of the stiff concrete conversion layer, the process is strictly controlled, the rectifying and modifying effects are good, the acceptance qualification rate is improved, the working efficiency is improved, and the construction period is saved.
Drawings
Fig. 1 is a diagram of the corrective action of the present invention.
FIG. 2 is a schematic diagram of a novel protective layer pad according to the present invention.
List of drawing identifiers:
1. the device comprises a base, 2, a base plate, 3, a positioning block, 4, an arc, 5, a connecting hole, 6 and a positioning pin.
Description of the embodiments
The present invention is further illustrated in the following drawings and detailed description, which are to be understood as being merely illustrative of the invention and not limiting the scope of the invention.
As shown in FIG. 1, the construction process for improving the quality of the stiffness concrete conversion layer comprises the following three steps:
1: installing prefabricated section steel columns, section steel beams and connecting section steel in place, and welding a shaping steel frame;
2: binding steel bars at the outer side of the section steel frame and the beam column joint area;
3: pouring concrete, and curing and forming.
The invention mainly solves the quality problems found in the construction process of the traditional stiff concrete conversion layer, and specifically comprises the following steps:
the quality problems of the stiffness concrete conversion layer which are finished in the past are firstly investigated, and a large amount of statistical data are collected, and the acceptance rate of the stiffness concrete is only 80 percent. See questionnaires for details:
from the above table, it can be seen that some subjective reasons are removed, and the main reasons affecting the acceptance rate of the stiff concrete conversion layer are as follows: the position deviation of the reserved holes of the steel column, the mounting position deviation of the longitudinal ribs of the stiff concrete beam and the position deviation of the holes of the steel column, the cumulative frequency reaches 80.1%, which is the main object for solving the problem.
And then, setting up a rectifying and modifying measure, wherein the set qualification rate is required to reach more than 95%.
Modification and implementation
Implementing the following steps: deviation of longitudinal rib protection layer of section steel beam
1. Aiming at the deviation of the upper protective layer and the lower protective layer of the shaped steel beam, the invention prepares a customized novel protective layer plastic cushion block, the height of which can be adjusted, the thickness deviation is controlled to be not more than 2mm,
as shown in fig. 2, the novel protective layer cushion block comprises a base 1, a base plate 2 and a positioning block 3, the base plate 2 is arranged between the base 1 and the positioning block 3, the positioning block is of a square structure with a sunken middle part, circular arcs 4 with the same size are arranged on four sides of the positioning block, the center part of a sunken area in the middle part of the positioning block is lower than the height of the lower edge of the circular arcs, two positioning blind holes are arranged on the back of the positioning block, a connecting hole 5 matched with the positioning blind holes is formed in the base plate 2, and positioning pins 6 matched with the positioning blind holes and the connecting hole 5 are arranged on the upper surface of the base.
A plurality of backing plates 2 can be placed between the base 1 and the positioning block 3 according to the height requirement, and the thickness of each backing plate is 2-4mm, so that the total thickness is ensured to reach the standard.
And II, implementation: longitudinal rib row spacing deviation of section steel beam
1. The accurate position of the longitudinal bar is marked on the stirrup by chalk during construction.
2. When the binding error of workers exceeds the standard, the steel bar is timely adjusted, and the longitudinal bar row spacing deviation of the section steel beam is ensured to be within +/-2 mm.
And (3) implementation: steel column installation deviation
1. After the steel beam column is manufactured and molded in a factory, the center line is lapped on flange plates at two ends of the steel beam column and is used as a mark for controlling the axis and the verticality during installation, and beam column section numbers are all numbered during factory delivery so as to facilitate installation. The fillet welds of the upper flange plate and the lower flange plate are welded by two welders at the opposite symmetrical positions by adopting the same current and the same welding speed along the same direction, thereby achieving the purpose of controlling deformation.
2. Elevation control
According to design requirements, determining the elevation of the installed steel column, controlling the error within a standard allowable range, measuring the elevation and deviation of the installed steel column, adjusting the elevation according to the length of the steel column to be installed, and adjusting gaps among column heads by using steel gaskets;
3. verticality and deflection control
Drawing column shaft center lines on two flange plates perpendicular to each other of a steel column, observing from different directions by using two theodolites according to floor axes, adjusting and controlling the verticality and deflection of the steel column by using a cable rope (a cable rope for a side column and an adjustable supporting rod), measuring the vertical deviation of the installed steel column, properly adjusting, slightly reserving an inclination amount, and counteracting the inclination amount by means of deformation in the installation and welding process;
4. rechecking
The installation accuracy of the profile steel column is directly related to the construction of the frame beam, the construction is strictly controlled, the adjustment is rechecked layer by layer, and the error accumulation is prevented. After rechecking is qualified, fixing the cable rope, screwing the lug plate by using a connecting plate, and loosening the hook of the tower crane for welding.
5. Correcting the bottom elevation, verticality, axis and span of the steel beam to enable the steel beam to meet design requirements;
after implementation, the test is carried out: the deviation of the beam column is +/-2 mm, and the requirements are met.
Through modification of attack and strict process control, the acceptance rate of the stiff concrete conversion layer is effectively improved, tracking inspection is carried out in the construction process of the subsequent XX project, the positions of 100 parts are inspected together, the positions of unqualified 2 parts are inspected together, the primary qualification rate reaches 98%, the expected effect is achieved, the working efficiency is improved, and the construction period is saved. Through the activity, a set of construction experience of the stiff concrete conversion layer is explored, and a beneficial experience is provided for construction of similar engineering in future. The method also writes a stiff concrete conversion layer construction operation instruction book, and improves staff quality through full staff learning.
Claims (7)
1. A construction process for improving the quality of a stiff concrete conversion layer is characterized by comprising the following steps of: the method comprises the following steps:
s1: installing prefabricated section steel columns, section steel beams and connecting section steel in place, and welding a shaping steel frame;
when the profile steel column is installed, in order to prevent the installation deviation, the following measures are adopted:
s11: after the profile steel column is manufactured and molded in a factory, a central line is lapped on flange plates at two ends of the profile steel column and is used as a mark for controlling the axis and the verticality during installation, and beam column section numbers are all numbered during factory delivery so as to be convenient to install; the fillet welds of the upper flange plate and the lower flange plate are welded by adopting two welders at the opposite symmetrical positions along the same direction by adopting the same current and the same welding speed, so that the purpose of controlling deformation is achieved;
s12, elevation control
According to the design requirement, determining the elevation of the installed profile steel column, determining the elevation and deviation of the installed profile steel column, adjusting the elevation according to the length of the profile steel column to be installed, and adjusting the gap between column heads by using a steel gasket;
s13, verticality and deflection control
Drawing column shaft center lines on two flange plates perpendicular to each other of the steel column, observing from different directions by using two theodolites according to floor axes, adjusting and controlling the verticality and deflection by using a cable rope, measuring the vertical deflection of the installed steel column, adjusting, reserving the inclination amount, and counteracting the inclination amount by means of deformation in the installation and welding process;
s14, rechecking
The installation precision of the profile steel column is directly related to the construction of the frame beam, is strictly controlled, and is adjusted by rechecking layer by layer so as to prevent error accumulation; after rechecking is qualified, fixing a cable rope, screwing up the lug plate by using a connecting plate, and loosening a hook of a tower crane for welding;
s15, correcting the bottom elevation, the verticality, the axis and the span of the steel beam to enable the steel beam to meet the design requirements;
s2: binding steel bars at the outer side of the section steel frame and the beam column joint area;
s3: in order to prevent the deviation of the longitudinal rib protection layer of the section steel beam, a novel protection layer cushion block is required to be manufactured, the installation is ensured to be in place, then concrete is poured, and the section steel beam is cured and molded;
the novel protective layer cushion block comprises a base, a base plate and a positioning block, wherein the base plate is arranged between the base and the positioning block, the positioning block is of a square structure with a sunken middle part, four sides of the positioning block are provided with circular arcs of the same size, the central part of a sunken area in the middle part of the positioning block is lower than the height of the lower edge of each circular arc, two positioning blind holes are formed in the back of the positioning block, connecting holes matched with the positioning blind holes are formed in the base plate, and positioning pins matched with the positioning blind holes and the connecting holes are arranged on the upper surface of the base.
2. The construction process for improving the quality of a stiff concrete conversion layer according to claim 1, wherein: the deviation of the section steel column is controlled within +/-2 mm, so that the requirement is met.
3. The construction process for improving the quality of a stiff concrete conversion layer according to claim 1, wherein: in the process of binding the steel bars in the step S2, the solution method for the deviation of the longitudinal bar row spacing of the section steel beam comprises the following steps: during construction, the accurate position of the longitudinal bar is marked on the stirrup, and when the binding error of a worker exceeds the standard, the position is adjusted in time.
4. A construction process for improving the quality of a stiff concrete conversion layer according to claim 3, characterized in that: and the row spacing deviation of all the section steel beams on site is controlled within +/-2 mm, so that the requirements are met.
5. The construction process for improving the quality of a stiff concrete conversion layer according to claim 1, wherein: the allowable deviation of the thickness of the protective layer of all the section steel beams on site is controlled within +/-2 mm, so that the requirements are met.
6. The construction process for improving the quality of a stiff concrete conversion layer according to claim 1, wherein: the number of the backing plates is more than or equal to 1.
7. The construction process for improving the quality of a stiff concrete conversion layer according to claim 1, wherein: the thickness of the backing plate is 2-4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210544170.0A CN114876054B (en) | 2022-05-19 | 2022-05-19 | Construction technology for improving quality of stiff concrete conversion layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210544170.0A CN114876054B (en) | 2022-05-19 | 2022-05-19 | Construction technology for improving quality of stiff concrete conversion layer |
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| Publication Number | Publication Date |
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| CN114876054A CN114876054A (en) | 2022-08-09 |
| CN114876054B true CN114876054B (en) | 2023-11-21 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806660A (en) * | 2014-01-17 | 2014-05-21 | 永升建设集团有限公司 | Stiff concrete structure beam-column node construction method |
| CN108222265A (en) * | 2018-01-16 | 2018-06-29 | 中厦建设有限公司 | A kind of multidirectional super large steel reinforced concrete conversion layer node construction engineering method |
| CN108412125A (en) * | 2018-02-28 | 2018-08-17 | 浙江勤业建工集团有限公司 | A kind of strengthening concrete composite structure frame beam column construction |
| CN110924537A (en) * | 2019-10-31 | 2020-03-27 | 江林 | Construction process of H-shaped steel concrete transfer beam-reinforced concrete column joint |
| CN111576620A (en) * | 2020-06-18 | 2020-08-25 | 中国建筑第五工程局有限公司 | Construction method for beam-column core area of stiffened concrete structure |
| CN211850389U (en) * | 2020-03-28 | 2020-11-03 | 四川华远建设工程有限公司 | Steel bar protective layer cushion block |
| CN215696768U (en) * | 2021-06-29 | 2022-02-01 | 华中科技大学 | Rolling die for steel bar positioning fingerprint module |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9475215B2 (en) * | 2013-03-15 | 2016-10-25 | Redi-Rock International, Llc | Form for casting a concrete light pole base |
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2022
- 2022-05-19 CN CN202210544170.0A patent/CN114876054B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806660A (en) * | 2014-01-17 | 2014-05-21 | 永升建设集团有限公司 | Stiff concrete structure beam-column node construction method |
| CN108222265A (en) * | 2018-01-16 | 2018-06-29 | 中厦建设有限公司 | A kind of multidirectional super large steel reinforced concrete conversion layer node construction engineering method |
| CN108412125A (en) * | 2018-02-28 | 2018-08-17 | 浙江勤业建工集团有限公司 | A kind of strengthening concrete composite structure frame beam column construction |
| CN110924537A (en) * | 2019-10-31 | 2020-03-27 | 江林 | Construction process of H-shaped steel concrete transfer beam-reinforced concrete column joint |
| CN211850389U (en) * | 2020-03-28 | 2020-11-03 | 四川华远建设工程有限公司 | Steel bar protective layer cushion block |
| CN111576620A (en) * | 2020-06-18 | 2020-08-25 | 中国建筑第五工程局有限公司 | Construction method for beam-column core area of stiffened concrete structure |
| CN215696768U (en) * | 2021-06-29 | 2022-02-01 | 华中科技大学 | Rolling die for steel bar positioning fingerprint module |
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| CN114876054A (en) | 2022-08-09 |
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