CN101694101A - Comprehensive detection method of anchoring status of prestress anchor cable - Google Patents
Comprehensive detection method of anchoring status of prestress anchor cable Download PDFInfo
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- CN101694101A CN101694101A CN200910191146A CN200910191146A CN101694101A CN 101694101 A CN101694101 A CN 101694101A CN 200910191146 A CN200910191146 A CN 200910191146A CN 200910191146 A CN200910191146 A CN 200910191146A CN 101694101 A CN101694101 A CN 101694101A
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Abstract
The invention discloses a comprehensive detection method of anchoring status of a prestress anchor cable. By detecting the anchor length, grouting plumpness, prestress and corrosive degree of the prestress anchor cable, the method conducts the contrastive analysis and comprehensive analysis of a single index and consequently analyzes the anchorage quality and safety performance of the prestress anchor cable. The detection method has great significance to control the construction quality of newly built anchoring engineering and grasp the operating status and safety of the existing anchoring engineering.
Description
Technical field
The present invention relates to a kind of detection method of civil engineering structure, particularly a kind of comprehensive detection method of anchoring status of prestress anchor cable.
Background technology
The prestress anchorage cable anchoring be development in recent years very fast, use reinforcing side slope technique more widely.The prestress anchorage cable anchoring can be given full play to the self-supporting ability of geotechnical body, regulates and improve self intensity and self-stable ability of geotechnical body, and a kind of strong active support means can be provided, and this is that non-prestressed supporting measure is beyond one's reach.
Anchoring is as permanent work, concealed work and prestress engineering, and the security and stability of engineering depends on the reinforcement effect of prestress anchorage cable to a great extent.And the anchoring quality of prestress anchorage cable and safety are the necessary conditions that guarantees the safe handling of prestress anchorage cable long period, are to make the normal basic data that uses of prestress anchorage cable and its anchoring status is detected.In the prior art, also do not have a kind of comprehensive detection analysis system of anchoring status of prestress anchor cable, just having caused does not have reliable foundation to existing newly-built and existing anchorage engineering yet.
Therefore, need a kind of comprehensive detection method of anchoring status of prestress anchor cable, when construction or in the use, by detecting and contrast, can be used in the anchoring status of check and analysis prestress anchorage cable, to the construction quality of controlling newly-built anchoring engineering, grasp the existing anchorage engineering operation conditions and safety significant.
Summary of the invention
In view of this, the invention provides a kind of comprehensive detection method of anchoring status of prestress anchor cable, when construction or in the use, by detecting and contrast, analyze the anchoring status of prestress anchorage cable, to the construction quality of controlling newly-built anchoring engineering, grasp the existing anchorage engineering operation conditions and safety significant.
Comprehensive detection method of anchoring status of prestress anchor cable of the present invention may further comprise the steps:
A. detect anchor long, grouting plumpness, prestressing force and the extent of corrosion of prestress anchorage cable, obtain the measured value of four indices;
B. the anchoring status comprehensive detection is divided into anchoring quality detection and anchoring safety detection;
The b1 anchoring quality detects and is divided into anchoring quality single index contrast detection and anchoring quality comprehensive detection;
Anchoring quality single index contrast detects: the anchor according to the measured prestress anchorage cable of step a is long, grouting plumpness and three measured values of prestressing force compare with the standard value of every quality index respectively, if nonconformance is arranged, then anchoring quality is defective; Otherwise, carry out the anchoring quality comprehensive detection;
The anchoring quality comprehensive detection:, grouting plumpness long and three numerical value of prestressing force lattice that are combined when the anchor of prestress anchorage cable, then with the anchoring quality classification, with the grouting plumpness of anchor cable as anchoring quality comprehensive detection conclusion and classification;
B2 anchoring safety detects and is divided into anchoring safety single index contrast detection and anchoring safety comprehensive detection;
Anchoring safety single index contrast detects: the anchor according to the measured prestress anchorage cable of step a is long, grouting plumpness, prestressing force and four measured values of extent of corrosion compare with the standard value of every safety index respectively, if nonconformance is arranged, then the anchoring safety is defective; Otherwise, carry out anchoring safety comprehensive detection;
Anchoring safety comprehensive detection: when anchor length, grouting plumpness, prestressing force and four numerical value of extent of corrosion of prestress anchorage cable are combined lattice, then with anchoring safety classification, with the anchor length of anchor cable as anchoring safety comprehensive detection conclusion and classification, the anchor of perhaps getting prestress anchorage cable is long, in grouting plumpness, prestressing force and four numerical value of extent of corrosion minimum as anchoring safety comprehensive detection conclusion and classification.
Further, among the step b1, the standard value of the anchor of prestress anchorage cable length, grouting plumpness and prestressed quality index is respectively:
The long quality index standard value of the anchor of anchor cable is 95% of a design load, and 95% of measured value＜design load is defective, otherwise is qualified;
Grouting plumpness quality index standard value is 75%, and plumpness＜75% is defective, and 75%≤plumpness is qualified;
Prestressing force quality index standard value is prestressed 20%, surveys prestressed loss of prestress rate or prestressing force LOADING RATES 〉=prestressed 20% for defective, otherwise is qualified;
Further, among the step b2, the anchor of anchor cable is long, the standard value of the safety indexes of grouting plumpness, prestressing force and extent of corrosion is respectively:
The long safety indexes standard value of the anchor of anchor cable is the long threshold of anchor, and actual measurement anchor length＜threshold is defective, otherwise is qualified; Threshold is according to formula
Calculate, wherein l '
c--interior anchoring segment length threshold, unit: m; E-injecting cement paste or muscle material modulus of elasticity, unit: kN/m
2A-injecting cement paste or muscle material sectional area, unit: m
2λ-injecting cement paste or muscle material side frictional resistance stiffness factor, unit: m
2/ kN;
Grouting plumpness safety indexes standard value is 75% plumpness, and plumpness＜75% is defective, and 75%≤plumpness is qualified;
Prestressing force safety indexes standard value is prestressed 30% for the loss of prestress rate, for the prestressing force LOADING RATES then is prestressing force numerical value, when loss of prestress rate＞prestressed 30% is defective, when prestressing force LOADING RATES＞prestressing force numerical value is defective, otherwise be qualified;
The extent of corrosion safety analysis when rate of corrosion 〉=4% is a heavy corrosion, then is defective, otherwise is qualified.
Beneficial effect of the present invention: comprehensive detection method of anchoring status of prestress anchor cable of the present invention,, grouting plumpness, prestressing force and extent of corrosion long by the anchor that detects prestress anchorage cable, carry out single index comparative analysis and analysis-by-synthesis, form index system, anchoring quality and safety to prestress anchorage cable are analyzed, to the construction quality of controlling newly-built anchoring engineering, grasp the existing anchorage engineering operation conditions and safety significant;
The anchor length that adopts anchor cable as index be because: anchor cable must have enough length and the unstable geotechnical body of side slope free face could be fixed on away from the deep of free face and stablize on the ground; Long ultimate bearing capacity of the anchor of anchor cable and inefficacy play an important role;
Adopt the grouting plumpness to be as index because: the grouting plumpness is the key factor that influences anchor safety and inefficacy; Occurring spillage in the work progress easily makes grouting not full;
Adopt prestressing force to be as index because: prestressing force is the basis of active anchor reinforcing side slope; In the use, prestressed variation is the key factor that influences safety;
Adopt extent of corrosion to be as index because: corrosion is the key factor that influences the anchor safety, is related to the durability and the safety of anchor cable.
The specific embodiment
The comprehensive detection method of anchoring status of prestress anchor cable of present embodiment may further comprise the steps:
A. detect anchor long, grouting plumpness, prestressing force and the extent of corrosion of prestress anchorage cable, obtain the measured value of four indices;
B. the anchoring status comprehensive detection is divided into anchoring quality detection and anchoring safety detection;
The b1 anchoring quality detects and is divided into anchoring quality single index contrast detection and anchoring quality comprehensive detection;
Anchoring quality single index contrast detects: the anchor according to the measured anchor cable of step a is long, grouting plumpness and three measured values of prestressing force compare with the standard value of every quality index respectively, if nonconformance is arranged, then anchoring quality is defective; Otherwise, carry out the anchoring quality comprehensive detection;
In the present embodiment, the standard value of the anchor of anchor cable length, grouting plumpness and prestressed quality index is respectively:
The long quality index standard value of the anchor of anchor cable is 95% of a design load, and 95% of measured value＜design load is defective, otherwise is qualified;
Grouting plumpness quality index standard value is 75%, and plumpness＜75% is defective, and 75%≤plumpness is qualified;
Prestressing force quality index standard value is prestressed 20%, surveys prestressed loss of prestress rate or prestressing force LOADING RATES 〉=prestressed 20% for defective, otherwise is qualified;
In the present embodiment, the concrete contrast lattice of tabulating as follows:
(1) anchor is long
The long testing result according to the form below of anchor is analyzed:
(2) grouting plumpness
Grouting plumpness testing result according to the form below is analyzed:
(3) prestressing force
Prestressing force testing result according to the form below is analyzed:
Anchoring quality comprehensive detection:, grouting plumpness long and three numerical value of prestressing force lattice that are combined when the anchor of anchor cable, then with the anchoring quality classification, in the present embodiment, the anchoring quality grade is divided into level Four: A (excellent), B (very), C (qualified), D (defective), with the grouting plumpness of anchor cable as anchoring quality comprehensive detection conclusion and classification;
B2 anchoring safety detects and is divided into anchoring safety single index contrast detection and anchoring safety comprehensive detection;
Anchoring safety single index contrast detects: the anchor according to the measured prestress anchorage cable of step a is long, grouting plumpness, prestressing force and four measured values of extent of corrosion compare with the standard value of every safety index respectively, if nonconformance is arranged, then the anchoring safety is defective; Otherwise, carry out anchoring safety comprehensive detection;
In the present embodiment, the anchor of prestress anchorage cable is long, the standard value of the safety indexes of grouting plumpness, prestressing force and extent of corrosion is respectively:
The long safety indexes standard value of the anchor of anchor cable is the long threshold of anchor, and actual measurement anchor length＜threshold is defective, otherwise is qualified; Threshold is according to formula
Calculate, wherein l '
c--interior anchoring segment length threshold, unit: m; E-injecting cement paste or muscle material modulus of elasticity, unit: kN/m
2A-injecting cement paste or muscle material sectional area, unit: m
2λ-injecting cement paste or muscle material side frictional resistance stiffness factor, unit: m
2/ kN;
Grouting plumpness safety indexes standard value is 75% plumpness, and plumpness＜75% is defective, and 75%≤plumpness is qualified;
Prestressing force safety indexes standard value is prestressed 30% for the loss of prestress rate, for the prestressing force LOADING RATES then is prestressing force numerical value, when loss of prestress rate＞prestressed 30% is defective, when prestressing force LOADING RATES＞prestressing force numerical value is defective, otherwise be qualified;
The extent of corrosion safety analysis when rate of corrosion 〉=4% is a heavy corrosion, then is defective, otherwise is qualified;
In the present embodiment, the concrete contrast lattice of tabulating as follows:
(1) anchor is long
The long testing result according to the form below of anchor is analyzed:
(4) grouting plumpness
(5) grouting plumpness testing result according to the form below is analyzed:
(2) prestressing force
Prestressing force testing result according to the form below is analyzed:
(3) corrosion
Corrosion index calculates after taking all factors into consideration the anti-corrosion measure factor of stratum corrosivity, anchor: the extent of corrosion of anchor is divided into the following fourth class: heavy corrosion, corresponding muscle material rate of corrosion 〉=4%; Moderate corrosion and slight corrosion, corresponding 4%＞muscle material rate of corrosion 〉=2%; Substantially there is not corrosion, corresponding muscle material rate of corrosion＜2%; According to the form below is analyzed:
Anchoring safety comprehensive detection: when anchor length, grouting plumpness, prestressing force and four numerical value of extent of corrosion of prestress anchorage cable are combined lattice, then with anchoring safety classification, with the anchor length of anchor cable as anchoring safety comprehensive detection conclusion and classification, the anchor of perhaps getting prestress anchorage cable is long, in grouting plumpness, prestressing force and four numerical value of extent of corrosion minimum as anchoring safety comprehensive detection conclusion and classification;
In the present embodiment, the anchoring safety grades is divided into three grades: safely, feel unwell complete, dangerous; The anchoring safety analysis is carried out on anchor long pointer analysis result basis by the following method: when anchor Chang'an complete analysis result when defective, then this anchor cable safety grades should be divided into dangerous; As complete analysis result in anchor Chang'an when being qualified or excellent, take all factors into consideration grouting plumpness, prestressing force, corrosion three indexs again and carry out analysis-by-synthesis; Under the simple scenario, analysis result least safe in the desirable single index is as Comprehensive analysis results.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. comprehensive detection method of anchoring status of prestress anchor cable is characterized in that: may further comprise the steps:
A. detect anchor long, grouting plumpness, prestressing force and the extent of corrosion of prestress anchorage cable, obtain the measured value of four indices;
B. the anchoring status comprehensive detection is divided into anchoring quality detection and anchoring safety detection;
The b1 anchoring quality detects and is divided into anchoring quality single index contrast detection and anchoring quality comprehensive detection;
Anchoring quality single index contrast detects: the anchor according to the measured prestress anchorage cable of step a is long, grouting plumpness and three measured values of prestressing force compare with the standard value of every quality index respectively, if nonconformance is arranged, then anchoring quality is defective; Otherwise, carry out the anchoring quality comprehensive detection;
The anchoring quality comprehensive detection:, grouting plumpness long and three numerical value of prestressing force lattice that are combined when the anchor of prestress anchorage cable, then with the anchoring quality classification, with the grouting plumpness of anchor cable as anchoring quality comprehensive detection conclusion and classification;
B2 anchoring safety detects and is divided into anchoring safety single index contrast detection and anchoring safety comprehensive detection;
Anchoring safety single index contrast detects: the anchor according to the measured prestress anchorage cable of step a is long, grouting plumpness, prestressing force and four measured values of extent of corrosion compare with the standard value of every safety index respectively, if nonconformance is arranged, then the anchoring safety is defective; Otherwise, carry out anchoring safety comprehensive detection;
Anchoring safety comprehensive detection: when anchor length, grouting plumpness, prestressing force and four numerical value of extent of corrosion of prestress anchorage cable are combined lattice, then with anchoring safety classification, with the anchor length of anchor cable as anchoring safety comprehensive detection conclusion and classification, the anchor of perhaps getting anchor cable is long, in grouting plumpness, prestressing force and four numerical value of extent of corrosion minimum as anchoring safety comprehensive detection conclusion and classification.
2. comprehensive detection method of anchoring status of prestress anchor cable according to claim 1 is characterized in that: among the step b1, the standard value of the anchor of prestress anchorage cable length, grouting plumpness and prestressed quality index is respectively:
The long quality index standard value of the anchor of anchor cable is 95% of a design load, and 95% of measured value＜design load is defective, otherwise is qualified;
Grouting plumpness quality index standard value is 75%, and plumpness＜75% is defective, and 75%≤plumpness is qualified;
Prestressing force quality index standard value is prestressed 20%, surveys prestressed loss of prestress rate or prestressing force LOADING RATES 〉=prestressed 20% for defective, otherwise is qualified.
3. comprehensive detection method of anchoring status of prestress anchor cable according to claim 1 and 2 is characterized in that: among the step b2, the anchor of prestress anchorage cable is long, the standard value of the safety indexes of grouting plumpness, prestressing force and extent of corrosion is respectively:
The long safety indexes standard value of the anchor of anchor cable is the long threshold of anchor, and actual measurement anchor length＜threshold is defective, otherwise is qualified; Threshold is according to formula
Calculate, wherein l '
c--interior anchoring segment length threshold, unit: m; E-injecting cement paste or muscle material modulus of elasticity, unit: kN/m
2A-injecting cement paste or muscle material sectional area, unit: m
2λ-injecting cement paste or muscle material side frictional resistance stiffness factor, unit: m
2/ kN;
Grouting plumpness safety indexes standard value is 75% plumpness, and plumpness＜75% is defective, and 75%≤plumpness is qualified;
Prestressing force safety indexes standard value is prestressed 30% for the loss of prestress rate, for the prestressing force LOADING RATES then is prestressing force numerical value, when loss of prestress rate＞prestressed 30% is defective, when prestressing force LOADING RATES＞prestressing force numerical value is defective, otherwise be qualified;
The extent of corrosion safety analysis when rate of corrosion 〉=4% is a heavy corrosion, then is defective, otherwise is qualified.
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| CN2009101911468A CN101694101B (en) | 2009-10-16 | 2009-10-16 | Comprehensive detection method of anchoring status of prestress anchor cable |
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| CN2009101911468A CN101694101B (en) | 2009-10-16 | 2009-10-16 | Comprehensive detection method of anchoring status of prestress anchor cable |
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Cited By (7)
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| CN104179176A (en) * | 2014-08-08 | 2014-12-03 | 山东科技大学 | Anchor wire prestress loss and rock-soil body creep coupling based computing method for side slope creep values |
| CN104196024A (en) * | 2014-08-08 | 2014-12-10 | 山东科技大学 | Prestressing loss computing method based on anchor cable prestressing losses and rock-soil body creep coupling |
| CN104265338A (en) * | 2014-09-17 | 2015-01-07 | 刘冰 | Efficiency determination method for roadway support unit |
| CN106226100A (en) * | 2016-07-15 | 2016-12-14 | 中南大学 | A kind of side slope prestress anchorage cable serviceability test structure and method of testing |
| CN113515802A (en) * | 2021-09-14 | 2021-10-19 | 四川交达预应力工程检测科技有限公司 | Machine learning-based anchor critical value detection method and system and storage medium |
| CN114088774A (en) * | 2021-11-24 | 2022-02-25 | 中铁五局集团建筑工程有限责任公司 | Anchor cable and rod grouting stage plumpness snap ring type detection device and detection method |
| CN114689695A (en) * | 2022-06-02 | 2022-07-01 | 长江水利委员会长江科学院 | Nondestructive testing analysis method for fullness of rock wall beam anchor rod |
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2009
- 2009-10-16 CN CN2009101911468A patent/CN101694101B/en not_active Expired - Fee Related
Cited By (12)
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| CN104179176A (en) * | 2014-08-08 | 2014-12-03 | 山东科技大学 | Anchor wire prestress loss and rock-soil body creep coupling based computing method for side slope creep values |
| CN104196024A (en) * | 2014-08-08 | 2014-12-10 | 山东科技大学 | Prestressing loss computing method based on anchor cable prestressing losses and rock-soil body creep coupling |
| CN104196024B (en) * | 2014-08-08 | 2016-10-26 | 山东科技大学 | The loss of prestress computational methods coupled with Rock And Soil creep are lost based on prestressd anchor cable |
| CN104179176B (en) * | 2014-08-08 | 2016-11-09 | 山东科技大学 | The slope creep amount computational methods coupled with Rock And Soil creep are lost based on prestressd anchor cable |
| CN104265338A (en) * | 2014-09-17 | 2015-01-07 | 刘冰 | Efficiency determination method for roadway support unit |
| CN106226100A (en) * | 2016-07-15 | 2016-12-14 | 中南大学 | A kind of side slope prestress anchorage cable serviceability test structure and method of testing |
| CN106226100B (en) * | 2016-07-15 | 2018-12-14 | 中南大学 | A kind of side slope prestress anchorage cable service performance test structure and test method |
| CN113515802A (en) * | 2021-09-14 | 2021-10-19 | 四川交达预应力工程检测科技有限公司 | Machine learning-based anchor critical value detection method and system and storage medium |
| CN114088774A (en) * | 2021-11-24 | 2022-02-25 | 中铁五局集团建筑工程有限责任公司 | Anchor cable and rod grouting stage plumpness snap ring type detection device and detection method |
| CN114088774B (en) * | 2021-11-24 | 2024-01-23 | 中铁五局集团建筑工程有限责任公司 | Clamping ring type detection device and detection method for plumpness in grouting stage of anchor cable and rod |
| CN114689695A (en) * | 2022-06-02 | 2022-07-01 | 长江水利委员会长江科学院 | Nondestructive testing analysis method for fullness of rock wall beam anchor rod |
| CN114689695B (en) * | 2022-06-02 | 2022-08-05 | 长江水利委员会长江科学院 | Nondestructive testing analysis method for fullness of rock wall beam anchor rod |
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