CN110987082B - Safety detection method for reinforced concrete building structure - Google Patents
Safety detection method for reinforced concrete building structure Download PDFInfo
- Publication number
- CN110987082B CN110987082B CN201911331497.4A CN201911331497A CN110987082B CN 110987082 B CN110987082 B CN 110987082B CN 201911331497 A CN201911331497 A CN 201911331497A CN 110987082 B CN110987082 B CN 110987082B
- Authority
- CN
- China
- Prior art keywords
- detection
- reinforced concrete
- building structure
- checking
- building
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to a method for detecting the safety of a reinforced concrete building structure, which comprises the following steps: s1, engineering investigation; s2, appearance quality inspection, wherein the appearance quality inspection is carried out on the building bearing member to know the member defects; s3, checking the section of the component; s4, beam column inspection, wherein the concrete strength of the beam column is detected by adopting a core drilling method; s5, checking and calculating analysis, namely checking and calculating analysis of the bearing capacity of the modified building structure according to the detection results from S1 to S4 and the scheme provided by the entrustment unit; and S6, safety assessment. The invention has the advantages that the structure reliability of the building can be intuitively known by the staff, the staff can conveniently modify or continuously use the reinforced concrete building structure in the later period, the probability of personal threat of the reinforced concrete building structure is reduced, the staff can carry out construction with pertinence, and the construction quality of the reinforced concrete building structure in the later period is improved.
Description
Technical Field
The invention relates to the technical field of building detection, in particular to a safety detection method for a reinforced concrete building structure.
Background
At present, reinforced concrete building structures are the most important civil engineering and building structures and occupy the position of great importance in social infrastructure.
The existing transformation engineering is mostly transformed on the basis of the original building structure, however, various aging and deterioration phenomena (such as cracks and concrete strength reduction) inevitably occur in the reinforced concrete building structure in the using process, if the construction quality cannot be well guaranteed, the deterioration of the structure can be accelerated, and the personal safety of people is threatened easily.
Therefore, after the building is used for a certain period of time and is injured by external force or before a modification project is carried out, a scientific safety detection method for building structure quality and the like is needed to be adopted to identify the building structure, and personal safety of people is guaranteed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for detecting the safety of a reinforced concrete building structure.
The above object of the present invention is achieved by the following technical solutions:
a safety detection method for a reinforced concrete building structure comprises the following steps:
s1, carrying out engineering investigation, including investigation on geotechnical engineering investigation reports, construction drawings, use histories, use environments and the like;
s2, appearance quality inspection, wherein the appearance quality inspection is carried out on the building bearing member to know the member defects;
s3, checking the cross section of the component: sampling and measuring the cross-sectional dimension of the component;
s4, beam column inspection, wherein the concrete strength of the beam column is detected by adopting a core drilling method;
s5, checking and calculating analysis, namely checking and calculating analysis of the bearing capacity of the modified building structure according to the detection results from S1 to S4 and the scheme provided by the entrustment unit;
and S6, safety evaluation, namely, evaluating the structural safety of the building according to the detection and bearing checking result and the reliability identification standard of the civil building.
By adopting the technical scheme, the construction method has the advantages that the structural reliability of the building can be visually known by the workers, the workers can conveniently modify or continuously use the reinforced concrete building structure in the later period, the probability of personal threat of the reinforced concrete building structure is reduced, the workers can construct the reinforced concrete building structure in a targeted manner, and the construction quality of the reinforced concrete building structure in the later period is improved.
The present invention in a preferred example may be further configured to: in the engineering investigation process, the use history, the current situation and the use environment of the reinforced concrete building need to be investigated, including but not limited to the understanding of original drawing scanning pieces, geological survey reports, reconstruction and extension schemes, original design units, original construction units and original supervision units, and the collected data are sampled, compared and analyzed for authenticity.
By adopting the technical scheme, the using process of the reinforced concrete building is known, the hidden defect is generated in the using process of the reinforced concrete building and the detection of the hidden defect is enhanced, the accuracy of detection data is improved, the probability that the reinforced concrete building structure threatens the human body is reduced, the work personnel can carry out construction with pertinence, and the construction quality of the reinforced concrete building structure in the later period is improved.
The present invention in a preferred example may be further configured to: in the process of sampling and measuring the size of the section of the member, a steel bar position detector is adopted to sample and detect the steel bar configuration condition of the reinforced concrete column, the beam and the plate, and chiseling verification is carried out on partial positions.
By adopting the technical scheme, on the premise of ensuring the accuracy of detection data, the detection quantity is reduced, the detection cost is saved, and the damage degree to the reinforced concrete building is reduced aiming at destructive detection modes such as chiseling verification and the like.
The present invention in a preferred example may be further configured to: in the appearance quality inspection process, key inspection is carried out according to disaster parts known in the engineering investigation process, the surface quality, the structural stress and the node connection damage of the disaster parts are inspected, and icon drawing is carried out; the influence on the interior of a building element during a disaster is estimated.
By adopting the technical scheme, the recessive defect of the reinforced concrete building structure to be detected is subjected to targeted detection, so that the detection accuracy is improved, the accuracy of detection data is improved, and the probability of personal threat of the reinforced concrete building structure is reduced.
The present invention in a preferred example may be further configured to: in the beam column inspection process, core-pulling sampling is carried out on the concrete member by adopting a core-drilling sampling method, and the compressive strength is detected in a natural dry state; and comparing the concrete compressive strength detection result and the average value thereof in each interval range with the low design strength grade, checking the bearing capacity of the reinforced concrete building by combining the detection structure, and judging whether the original design requirements are met.
By adopting the technical scheme, the concrete detection of the member is carried out in batch, the operation is simple, the detection on a large scale is convenient, and the detection result of the strength of the concrete member is more accurate.
The present invention in a preferred example may be further configured to: in the process of checking the bearing capacity, the concrete strength of the detected component is taken as an actual value, and the concrete strength of the undetected component is taken as an estimated value; taking values according to design when the cross section sizes of the beam and the column meet the design, or taking values according to measured values; the grade of the steel bar refers to a real object, and whether the mechanical property of the steel bar meets the requirements of related national specifications or not is judged according to the type of the steel bar; when the non-fully-buried basement is designed, the embedding effect of the surrounding soil of the basement is not considered in the bearing capacity checking process.
By adopting the technical scheme, the detection quantity is reduced, the detection cost is saved, and the damage degree to the reinforced concrete building is reduced.
The present invention in a preferred example may be further configured to: in the beam column inspection process, firstly, determining each detection interval, coring amount and coring depth according to related building data acquired in the engineering investigation process, marking the distribution condition of reinforcing steel bars in a detection area through an ultrasonic detection device, marking and scribing in the detection area, taking two core samples at a position with lower reinforcing steel bar density and a position with higher reinforcing steel bar density in the same detection area, and calculating the average value of the core samples to be the concrete strength of the beam column at the position.
By adopting the technical scheme, the accuracy of detection data is improved and the probability of personal threat of the reinforced concrete building structure is reduced through comparison and detection.
The present invention in a preferred example may be further configured to: in the process of knowing the defects of the component, carrying out steel structure corrosivity detection on a coagulation component area with more steel structures, in the detection process, defining a corrosivity detection area and a comparison area, wherein data display of the steel structures at the corrosivity detection area and the comparison area in engineering investigation is the same, magnetizing a selected comparison area by using a strong magnetic field, recording magnetic field data at the selected comparison area after magnetization, chiseling to confirm that the corrosivity detection area meets the standard requirement, magnetizing the corrosivity detection area by using the same steps, comparing the magnetic field change at the two positions, and analyzing or chiseling to confirm the corrosivity detection area with the out-of-range value.
By adopting the technical scheme, the detection quantity is reduced, the detection accuracy is improved, the detection cost is saved, and the damage degree to the reinforced concrete building structure is reduced.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the reinforced concrete building structure has the advantages that the structural reliability of a building can be visually known by workers, the workers can conveniently modify or continuously use the reinforced concrete building structure in the later period, the probability that the reinforced concrete building structure threatens the human body is reduced, the workers can construct the reinforced concrete building structure in a targeted manner, and the construction quality of the reinforced concrete building structure in the later period is improved.
2. The detection range is reduced, the detection accuracy is improved, the detection cost is saved, and the damage degree to the reinforced concrete building structure is reduced.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the method for detecting the safety of a reinforced concrete building structure disclosed by the invention is used for detecting the safety of a certain reinforced concrete building structure on site, and comprises the following steps:
s1, engineering investigation, wherein the engineering for the reconstruction of the reinforced concrete building structure is to reconstruct the original structure, and in order to solve the structural reliability of the building and provide relevant basis for the reconstruction, the engineering investigation is required to be carried out in advance, including the investigation of geotechnical engineering investigation reports, construction drawings, use history, use environment and the like; the use history, the current situation and the use environment of the reinforced concrete building need to be investigated, including but not limited to the understanding of original drawing scanning pieces, geological survey reports, reconstruction and extension schemes, original design units, original construction units and original supervision units, the collected data are sampled, compared and analyzed for authenticity, the method to be reconstructed next is determined, and the position of a detection interval is analyzed.
S2, appearance quality inspection, wherein the appearance quality inspection is carried out on the building bearing member to know the member defects; the working personnel need to perform key inspection according to the disaster parts known in the engineering investigation process, inspect the surface quality, the structural stress and the node connection damage of the disaster parts and perform icon drawing; estimating the influence on the interior of the building component in the disaster occurrence process; the method comprises the steps that in the process of knowing defects of a component, a worker carries out steel structure corrosivity detection on a coagulated component area with more steel structures, a corrosivity detection area and a comparison area are defined in the detection process, data of the steel structures at the corrosivity detection area and the comparison area in engineering investigation are displayed in the same mode, a strong magnetic field is used for magnetizing a selected comparison area, magnetic field data at the selected comparison area are recorded after magnetization, chiseling is carried out to confirm that the corrosivity detection area meets the standard requirement, then the corrosivity detection area is magnetized in the same step, magnetic field changes at the two positions are compared, and the corrosivity detection area beyond the range value is analyzed or chiseling is confirmed.
S3, checking the cross section of the component: sampling and measuring the cross-sectional dimension of the component; and sampling and detecting the steel bar configuration condition of the reinforced concrete column, the beam and the plate by adopting a steel bar position detector, and performing chiseling verification on partial positions.
S4, beam column inspection, wherein the concrete strength of the beam column is detected by adopting a core drilling method; in the sampling inspection process, workers adopt a core drilling sampling method to perform core pulling sampling on the concrete member and perform compressive strength detection in a natural dry state; comparing the concrete compressive strength detection result and the average value thereof in each interval range with the low design strength grade, checking the bearing capacity of the reinforced concrete building by combining the detection structure, and judging whether the original design requirement is met; the method has the advantages that the concrete detection of the member is carried out in batches, the operation is simple, the measurement in a large range is convenient, and the detection result of the strength of the concrete member is more accurate; in the process of core drilling and sampling, a worker firstly determines each detection interval, core taking amount and core taking depth according to data of relevant buildings acquired in the process of engineering investigation, marks the distribution condition of reinforcing steel bars in a detection area through an ultrasonic detection device, marks and lines in the detection area, takes core samples at two positions of a position with lower reinforcing steel bar density and a position with higher reinforcing steel bar density in the same detection area, and calculates the average value of the core samples to be the concrete strength of the beam column at the position.
S5, checking and calculating analysis, namely checking and calculating analysis of the bearing capacity of the modified building structure according to the detection results from S1 to S4 and the scheme provided by the entrustment unit; the concrete strength of the detected component is taken as an actual value, and the concrete strength of the undetected component is taken as an estimated value; taking values according to design when the cross section sizes of the beam and the column meet the design, or taking values according to measured values; the grade of the steel bar refers to a real object, and whether the mechanical property of the steel bar meets the requirements of related national specifications or not is judged according to the type of the steel bar; when the non-fully-buried basement is designed, the embedding effect of the surrounding soil of the basement is not considered in the bearing capacity checking process; the detection quantity is reduced, the detection cost is saved, and the damage degree to the reinforced concrete building is reduced.
And S6, safety evaluation, namely, evaluating the structural safety of the building according to the detection and bearing checking result and the reliability identification standard of the civil building.
In the process of detecting the reinforced concrete building structure by the detection method, workers determine and compare detection results according to the following standard; the method comprises the following steps:
civil building reliability evaluation Standard (GB 50292-2015); building structure detection technology Standard (GB/T50344-2004); the technical standard of concrete structure field detection (GB/T50784-2013); technical Specification for detecting reinforcement in concrete (JGJ/T152-); the technical specification of the core drilling method for detecting the concrete strength (JGJ/T384-); building deformation measurement Specifications (JGJ 8-2016); building structure load code (GB 50009-2012); specification for concrete Structure design (GB 50010-2010); the technical regulation of concrete structure of high-rise buildings (JGJ-3-2010), data related to on-site actual exploration and physical detection, data files referred by consignors, national current specifications, regulations, standards and the like.
The detection instrumentation used in the detection process includes, but is not limited to: the device comprises an engineering drilling machine, a concrete steel bar position detector, a nonmetal plate thickness tester, calipers, a measuring tape, a laser range finder, a magnetizing device, a magnetizing detector and the like.
By adopting the safety detection method of the reinforced concrete building structure, the working state of the structural workpiece of the building component of the building structure is checked, the foundation base inspection condition and the deformation and damage inspection condition of the upper structure of the building structure are evaluated, the building main structure component of the building structure is detected, firstly, the structural plane layout is mapped, the size and the structural strength of the component are detected, a structural analysis model is drawn according to the detection data, the structural bearing capacity is checked, and the column bearing capacity, the axial pressure ratio of the frame column, the beam bearing capacity, the plate bearing capacity and the foundation bearing capacity are checked and evaluated.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (3)
1. A safety detection method for a reinforced concrete building structure is characterized by comprising the following steps: the method comprises the following steps:
s1, engineering investigation including geotechnical engineering investigation report, construction drawing, use history and use environment investigation;
s2, appearance quality inspection, wherein the appearance quality inspection is carried out on the building bearing member to know the defects of the member, in the appearance quality inspection process, the key inspection is carried out according to the disaster parts known in the engineering investigation process, the surface quality, the structural stress and the node connection damage of the member are inspected, and the icon drawing is carried out; the method comprises the steps of presuming the influence on the interior of a building component in the disaster occurrence process, carrying out steel structure corrosivity detection on a coagulated component area with more steel structures in the component defect knowing process, defining a corrosivity detection area and a comparison area in the detection process, wherein data display of the steel structures in the corrosivity detection area and the comparison area in engineering investigation is the same, magnetizing the selected comparison area by using a strong magnetic field, recording magnetic field data at the selected comparison area after magnetization, chiseling to confirm that the corrosivity detection area meets the standard requirement, magnetizing the corrosivity detection area by using the same steps, comparing the magnetic field change at the two positions, and analyzing or chiseling to confirm the corrosivity detection area with the out-of-range value;
s3, checking the cross section of the component: sampling measurement is carried out on the size of the section of the component, a reinforcing steel bar position detector is adopted to sample and detect the reinforcing steel bar configuration condition of a reinforced concrete column, a beam and a plate, and chiseling verification is carried out on partial positions;
s4, beam column inspection, wherein the concrete strength of a beam column is detected by adopting a core drilling method, each detection interval, coring amount and coring depth are determined according to data of relevant buildings acquired in the engineering investigation process, the distribution condition of steel bars in a detection area is marked by an ultrasonic detection device, marking and scribing are carried out in the detection area, two core samples at a position with lower steel bar density and a position with higher steel bar density are taken from the same detection area, and the average value of the core samples is calculated as the concrete strength of the beam column at the position;
s5, checking and calculating analysis, wherein the checking and calculating analysis is carried out on the bearing capacity of the modified building structure according to the detection results from S1 to S4 and the scheme provided by the entrustment unit, in the process of checking and calculating the bearing capacity, the strength of the concrete of the detected component is taken as an actual value, and the strength of the concrete of the undetected component is taken as an estimated value; taking values according to design when the cross section sizes of the beam and the column meet the design, or taking values according to measured values; the grade of the steel bar refers to a real object, and whether the mechanical property of the steel bar meets the requirements of related national specifications or not is judged according to the type of the steel bar; when the non-fully-buried basement is designed, the embedding effect of the surrounding soil of the basement is not considered in the bearing capacity checking process;
and S6, safety evaluation, namely, evaluating the structural safety of the building according to the detection and bearing checking result and the reliability identification standard of the civil building.
2. The reinforced concrete building structure safety detection method as claimed in claim 1, wherein: in the engineering investigation process, the use history, the current situation and the use environment of the reinforced concrete building need to be investigated, including but not limited to the understanding of original drawing scanning pieces, geological survey reports, reconstruction and extension schemes, original design units, original construction units and original supervision units, and the collected data are sampled, compared and analyzed for authenticity.
3. The reinforced concrete building structure safety detection method as claimed in claim 1, wherein: in the beam column inspection process, core-pulling sampling is carried out on the concrete member by adopting a core-drilling sampling method, and the compressive strength is detected in a natural dry state; and comparing the concrete compressive strength detection result and the average value thereof in each interval range with the low design strength grade, checking the bearing capacity of the reinforced concrete building by combining the detection structure, and judging whether the original design requirements are met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911331497.4A CN110987082B (en) | 2019-12-21 | 2019-12-21 | Safety detection method for reinforced concrete building structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911331497.4A CN110987082B (en) | 2019-12-21 | 2019-12-21 | Safety detection method for reinforced concrete building structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110987082A CN110987082A (en) | 2020-04-10 |
| CN110987082B true CN110987082B (en) | 2021-11-05 |
Family
ID=70074499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911331497.4A Active CN110987082B (en) | 2019-12-21 | 2019-12-21 | Safety detection method for reinforced concrete building structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110987082B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588683B (en) * | 2021-08-04 | 2024-04-26 | 广州市稳建工程检测有限公司 | Reinforced concrete structure detection system and detection method based on building |
| CN116188205B (en) * | 2023-05-04 | 2023-08-01 | 广东华厦工程顾问有限公司 | Intelligent analysis management and control system for building construction based on Internet of things technology |
| CN116934179B (en) * | 2023-09-15 | 2023-12-01 | 菏泽建工建筑设计研究院 | Building engineering quality detection data analysis management system based on big data |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002251427A (en) * | 2001-02-23 | 2002-09-06 | Kenzo Matsuo | Sales operation system for housing construction business |
| JP2013122443A (en) * | 2011-11-11 | 2013-06-20 | Hideo Ando | Biological activity measuring method, biological activity measuring device, method for transfer of biological activity detection signal and method for provision of service using biological activity information |
| CN104992036A (en) * | 2015-07-28 | 2015-10-21 | 青岛理工大学 | Situ monitoring based building damage evaluation and analysis system and method |
| CN106339815A (en) * | 2016-08-30 | 2017-01-18 | 北京易用视点科技有限公司 | Concrete construction process structured data realization method |
| CN106934729B (en) * | 2017-03-09 | 2021-03-30 | 河北省建筑科学研究院有限公司 | Building detection and identification method and device |
| CN107036658A (en) * | 2017-05-23 | 2017-08-11 | 吕梁学院 | A kind of appraisal procedure of shock resistance of the building and application |
| CN107300584A (en) * | 2017-07-05 | 2017-10-27 | 黄冈职业技术学院 | Corrosion of steel structure Magnetic sensing methods in a kind of armored concrete |
| CN109813799A (en) * | 2017-11-22 | 2019-05-28 | 周卫国 | Corrosion of steel structure Magnetic sensing methods in armored concrete |
| CN109115864A (en) * | 2018-07-17 | 2019-01-01 | 韩德耀 | Corrosion of steel structure Magnetic sensing methods in armored concrete |
-
2019
- 2019-12-21 CN CN201911331497.4A patent/CN110987082B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110987082A (en) | 2020-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110987082B (en) | Safety detection method for reinforced concrete building structure | |
| Masi et al. | An experimental study on the within-member variability of in situ concrete strength in RC building structures | |
| Samia et al. | Application of the combined method for evaluating the compressive strength of concrete on site | |
| Ramesh et al. | Health Monitoring of Structures by Using Non-Destructive Testing Methods | |
| Pereira et al. | Harmonising the classification of diagnosis methods within a global building inspection system: Proposed methodology and analysis of fieldwork data | |
| Jedidi et al. | Non-destructive testing for the diagnosis and repair of a reinforced concrete building | |
| Lorenzi et al. | Investigation of the potential for evaluation of concrete flaws using nondestructive testing methods | |
| Goh et al. | Understanding the stiffness of soils in Singapore from pressuremeter testing | |
| Lorenzi et al. | Application of ultrasonic pulse velocity to detect concrete flaws | |
| CN116147867A (en) | Bridge safety detection method and system | |
| Johnston | Silurian and Lower Devonian engineering properties | |
| Duvnjak et al. | Structural health monitoring of cultural heritage structures: Applications on Peristyle of Diocletian’s palace in Split | |
| Kabashi et al. | Evaluation the compressive strength in concrete structures using the in-situ test methods | |
| US10690586B2 (en) | Rapid detection and quantification of surface and bulk corrosion and erosion in metals and non-metallic materials with integrated monitoring system | |
| Ponzo et al. | Seismic assessment of the R/C buildings: the case study of Di. Coma. C Centre after the L’Aquila (Italy) 2009 seismic sequence | |
| Hrabová et al. | Using the ultrasonic method for the defectoscopy of failures in reinforced concrete columns | |
| Nemade et al. | STRUCTURAL HEALTH MONITORING IN CIVIL ENGINEERING | |
| Mohshin | Structural integrity assessment by destructive testing and nondestructive testing | |
| Gambilongo et al. | Evaluation of non-destructive techniques for mechanical characterisation of earth-based mortars in masonry joints | |
| Ericsson et al. | Non-destructive testing of the historic timber roof structures of the national museum in stockholm, sweden | |
| Ali et al. | EVALUATION OF IN SITU MECHANICAL PROPERTIES AND QUALITY OF CONCRETE STRUCTURES BY NON DESTRUCTIVE TESTING | |
| Juan et al. | The condition assessment scheme for ancient timber structure using material and deformation analysis | |
| Ahsan et al. | RELIABLE MEASUREMENT OF IN-SITU CONCRETE STRENGTH AND IMPLICATIONS IN BUILDING SAFETY ASSESSMENT | |
| Zhou et al. | Seismic damage detection for a masonry building using aftershock monitoring data | |
| Lokesh et al. | Study on Soundness of Reinforced Concrete Structures by NDT Approach |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |