CN102127917A - Low-strain testing device for detecting integrity of ultralong bored concrete pile - Google Patents
Low-strain testing device for detecting integrity of ultralong bored concrete pile Download PDFInfo
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- CN102127917A CN102127917A CN 201010570694 CN201010570694A CN102127917A CN 102127917 A CN102127917 A CN 102127917A CN 201010570694 CN201010570694 CN 201010570694 CN 201010570694 A CN201010570694 A CN 201010570694A CN 102127917 A CN102127917 A CN 102127917A
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Abstract
The invention provides a low-strain testing device for detecting integrity of an ultralong bored concrete pile. The testing device comprises a plurality of relay sensors, a plurality of sensor protecting bodies, a signal cable, a pile top sensor, a force hammer and an engineering detector. The testing device has the following advantages: the testing device detects the integrity of the bored concrete pile by embedding the relay sensors in the appropriate parts of the pile body and adopting the methods of field data acquisition and signal analysis, so not only can the stress wave propagation distance be reduced, but also the structure of the pile body can not be damaged, thus ensuring the quality of the pile body and the safety of the upper structure; the testing device has high detection precision, high detection speed, low impact on the construction process, simple structure and low detection cost; and besides, the device can be applicable to the piles with different length by adjusting the quantity of the embedded sensors, so the device can solve the problem that the integrity of the long piles with length being more than 50m can not be accurately detected at present and has wide range of application.
Description
Technical field
The invention belongs to technical field of buildings, particularly relate to a kind of being specifically designed to and detect the low strain detection testing device that length surpasses the concrete spouting pile integrality of 50m.
Background technology
Increasing along with large span, super-span structure and large-scale tall buildings, has the cast-in-place concrete pile that anti-seismic performance is good, settling amount is little, bearing capacity is high, can solve the advantages such as bearing capacity of special soil base, especially length is more and more general above 50 meters long stake application, so the quality of pile foundation has become the key factor that influences superstructure safety.At present, the method that is used to detect pile quality is more, and method commonly used comprises ultrasonic transmission beam method, bore extracting core process and low strain back wave etc.Surpass 50 meters long stake for length, commonplace employing is ultrasonic transmission beam method in the present pile foundation engineering, but because this method needs pre-buried sound detecting pipe, and the diameter to pile body has certain requirement, therefore detection efficiency is low, the cost height, thus construction speed there is certain influence.And the boring and coring rule can cause certain infringement to pile body, particularly, bigger along the elongated boring and coring difficulty of pile body for elongated stake, and coming out for broken pile or the damaged also difficult inspection of section in some cases, therefore operate also cumbersomely, inconvenience is adopted.Though the operating process of low strain reflected is easy, cost is lower, but, for the long stake more than 50 meters, reflection at the bottom of this method is difficult to detect, produce wide pulse signal even if use bigger power rod to knock, also differing detects stake end signal clearly surely, and precision is relatively poor.The substantive test data shows that the stake that above-mentioned these methods can effectively detect is long generally to be no more than 40 meters.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of accuracy of detection height, simple in structure and the low strain detection testing device that is used to detect ultra-long concrete castinplace pile integrality that cost is low.
In order to achieve the above object, the low strain detection testing device that is used to detect ultra-long concrete castinplace pile integrality provided by the invention comprises a plurality of relay sensors, a plurality of sensor protection body, signal cable, stake top sensor, power hammer and engineering detecting instrument; Wherein a plurality of relay sensors are separated by a distance to be fixed on the longitudinal reinforcement of cast-in-place concrete pile, and the external packets of each relay sensor is covered with a sensor protection body with protection against the tide and shock resistance effect; Stake top sensors coupled is on the end face of cast-in-place concrete pile; Lead-out wire on the power hammer links to each other with the engineering detecting instrument, and its tup is positioned at the top face of cast-in-place concrete pile, so can knock the end face at cast-in-place concrete pile when working downwards; The engineering detecting instrument joins with a plurality of relay sensors and stake top sensor simultaneously by signal cable.
Described relay sensor is a piezoelectric ceramics compressional wave sensor, and stake top sensor is low strain detection sensor commonly used.
Described sensor protection body is by epoxy resin and cement mortar multi-shell curing and make.
The low strain detection testing device that is used to detect ultra-long concrete castinplace pile integrality provided by the invention is to adopt the integrality that detects cast-in-place concrete pile in the method for the pre-buried relay sensor of the suitable position of pile body and on-site data gathering and signal analysis, so not only can reduce the stress wave propagation distance, need not to destroy the structure of pile body simultaneously, therefore can guarantee the quality of pile body and the safety of superstructure, and the precision height that detects, speed is fast, influence to work progress is little, simple in structure, it is low to detect cost.In addition, this device can utilize the method for adjusting pre-buried sensor quantity to be applicable to that different stakes is long, can solve the present problem that long pile integrality can't accurately detect more than 50 meters, and is therefore applied widely.
Description of drawings
Fig. 1 is the low strain detection testing device structural representation that is used to detect ultra-long concrete castinplace pile integrality provided by the invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the low strain detection testing device that is used to detect ultra-long concrete castinplace pile integrality provided by the invention is elaborated.
As shown in Figure 1, the low strain detection testing device that is used to detect ultra-long concrete castinplace pile integrality provided by the invention comprises a plurality of relay sensors 1, a plurality of sensor protection body 2, signal cable 3, stake top sensor 4, power hammer 6 and engineering detecting instrument 5; Wherein a plurality of relay sensor 1 is separated by a distance to be fixed on the longitudinal reinforcement of cast-in-place concrete pile 7, and the external packets of each relay sensor 1 is covered with a sensor protection body 2 with protection against the tide and shock resistance effect; Stake top sensor 4 is coupling on the end face of cast-in-place concrete pile 7; Lead-out wire on the power hammer 6 links to each other with engineering detecting instrument 5, and its tup is positioned at the top face of cast-in-place concrete pile 7, so can knock the end face at cast-in-place concrete pile 7 when working downwards; Engineering detecting instrument 5 joins with a plurality of relay sensors 1 and stake top sensor 4 simultaneously by signal cable 3.
Described relay sensor 1 is a piezoelectric ceramics compressional wave sensor, and stake top sensor is low strain detection sensor commonly used.
Described sensor protection body 2 is by epoxy resin and cement mortar multi-shell curing and make.
Now the course of work of utilizing low strain detection testing device provided by the invention to detect ultra-long concrete castinplace pile integrality is described below:
1) at first epoxy resin and cement mortar layering are wrapped on the relay sensor 1, simultaneously the sensor lead-out wire are outwards drawn, make sensor protection body 2 after the curing by the staff;
2) a plurality of relay sensor 1 lead-out wire ends that have sensor protection body 2 are connected with signal cable 3 bottoms, joint area should be carried out sealing and moistureproof the processing;
3) with on a plurality of relay sensor that has a sensor protection body 21 longitudinal reinforcement that is fixed on the cast-in-place concrete pile 7 of building in advance separated by a distance, bottom with signal cable 3 also is fixed on the longitudinal reinforcement simultaneously, top causes ground, and the quantity of relay sensor 1 and installation site need to determine as calculated according to stake is long;
4) the beginning concreting should guarantee that in this process signal cable 3 is not torn, until forming cast-in-place concrete pile 7;
5) after the intensity for the treatment of cast-in-place concrete pile 7 reached pre-provisioning request, the good stake of coupling top sensor 4 linked to each other by signal cable 3 stake top sensor 4 then with engineering detecting instrument 5 on its end face, power was hammered into shape 6 lead-out wire and engineering detecting instrument 5 and was joined;
6) firmly hammer 6 into shape and knock the suitable position at cast-in-place concrete pile 7 tops, utilize engineering detecting instrument 5 to gather the signal of relay sensor 1 and stake top sensor 4 simultaneously;
7) engineering detecting instrument 5 will be handled and analyze the signal of above-mentioned collection, at last according to the low strain wave attenuation characteristic of foundation pile, adopt concrete spouting pile integrality vibration image analysis technology assessment to go out the integrality of pile body.
Claims (3)
1. low strain detection testing device that is used to detect ultra-long concrete castinplace pile integrality is characterized in that: the described low strain detection testing device that is used to detect the concrete spouting pile integrality comprises a plurality of relay sensors (1), a plurality of sensor protection body (2), signal cable (3), stake top sensor (4), power hammer (6) and engineering detecting instrument (5); Wherein a plurality of relay sensors (1) standoff distance is fixed on the longitudinal reinforcement of cast-in-place concrete pile (7), and the external packets of each relay sensor (1) is covered with a sensor protection body (2) with protection against the tide and shock resistance effect; Stake top sensor (4) is fixed on the end face of cast-in-place concrete pile (7) by couplant; Lead-out wire on the power hammer (6) links to each other with engineering detecting instrument (5), and its tup is positioned at the top face of cast-in-place concrete pile (7), so can knock the end face in cast-in-place concrete pile (7) when working downwards; Engineering detecting instrument (5) joins with a plurality of relay sensors (1) and stake top sensor (4) simultaneously by signal cable (3).
2. the low strain detection testing device that is used to detect ultra-long concrete castinplace pile integrality according to claim 1, it is characterized in that: described relay sensor (1) is a piezoelectric ceramics compressional wave sensor, and stake top sensor (4) is low strain detection sensor commonly used.
3. the low strain detection testing device that is used to detect ultra-long concrete castinplace pile integrality according to claim 1 is characterized in that: described sensor protection body (2) is by epoxy resin and cement mortar multi-shell curing and make.
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| CN 201010570694 CN102127917A (en) | 2010-12-03 | 2010-12-03 | Low-strain testing device for detecting integrity of ultralong bored concrete pile |
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| CN 201010570694 CN102127917A (en) | 2010-12-03 | 2010-12-03 | Low-strain testing device for detecting integrity of ultralong bored concrete pile |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877490A (en) * | 2012-09-18 | 2013-01-16 | 河海大学 | Method for detecting quality of large-diameter tubular pile at low strain |
| CN103255785A (en) * | 2012-02-15 | 2013-08-21 | 陈彦平 | Technology for performing foundation pile quality detection and geology survey by adopting single tube longitudinal wave method |
| CN103362151A (en) * | 2013-07-30 | 2013-10-23 | 中国化学工程第一岩土工程有限公司 | Method for detecting prestress concrete pipe pile horizontal stress |
| CN103821184A (en) * | 2014-01-27 | 2014-05-28 | 广东省建筑科学研究院 | Stress wave multi-point excitation method and multi-point excitation device for detecting quality of foundation piles |
| CN103898928A (en) * | 2014-03-12 | 2014-07-02 | 广东省建筑科学研究院 | Improved high strain method |
| CN104110031A (en) * | 2013-04-22 | 2014-10-22 | 南通市常青建筑安装工程有限公司 | High-bearing-capacity foundation pile and method for processing same and foundation |
| CN104612187A (en) * | 2014-12-31 | 2015-05-13 | 梁夏萍 | Low-strain dynamic monitoring device for underwater pile foundation |
| CN104727352A (en) * | 2015-02-04 | 2015-06-24 | 水利部交通运输部国家能源局南京水利科学研究院 | Installation method of PHC tubular pile optical fiber strain gauge |
| CN107014987A (en) * | 2017-06-06 | 2017-08-04 | 四川大学 | The intelligent Multiinputoutput concrete component health monitor method of square-section self-induction |
| CN107064473A (en) * | 2017-06-06 | 2017-08-18 | 四川大学 | Circular cross-section self-induction intelligence Multiinputoutput concrete component health monitor method |
| CN107142977A (en) * | 2017-07-10 | 2017-09-08 | 荣垂强 | Low strain dynamic two-speed signal averaging detection method under the percussion of building foundation center |
| CN107782788A (en) * | 2017-10-31 | 2018-03-09 | 中国电力科学研究院有限公司 | A kind of experimental rig of transmission line of electricity poured pile base Pile Integrity Testing |
| CN108894244A (en) * | 2018-08-14 | 2018-11-27 | 广东电网有限责任公司 | A kind of electric power pylon foundation structure integrality low strain dynamic uplink wave detecting method |
| CN109208657A (en) * | 2018-10-31 | 2019-01-15 | 湖南湘建检测有限公司 | A kind of low strain dynamic quality testing measuring tool and its test method |
| CN110173005A (en) * | 2019-05-15 | 2019-08-27 | 浙江大学 | The Kong Zhongshuan measuring point low strain integrity test device and method of foundation pile |
| CN110552344A (en) * | 2018-06-01 | 2019-12-10 | 北京新桥技术发展有限公司 | Automatic control device for lifting height of guide pipe in pouring process of cast-in-place pile |
| CN111549833A (en) * | 2020-05-11 | 2020-08-18 | 安徽建大交通科技有限公司 | Foundation pile detection method and system and storage medium |
| CN111579355A (en) * | 2020-06-18 | 2020-08-25 | 湖北震泰建设工程质量检测有限责任公司 | Concrete cast-in-place pile static load test unbalance loading monitoring method based on piezoelectric impedance frequency shift |
| CN113833035A (en) * | 2021-09-09 | 2021-12-24 | 浙江永欣联科信息科技股份有限公司 | Existing pile foundation monitoring and early warning system and evaluation method for sea-crossing bridge |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255785A (en) * | 2012-02-15 | 2013-08-21 | 陈彦平 | Technology for performing foundation pile quality detection and geology survey by adopting single tube longitudinal wave method |
| CN102877490A (en) * | 2012-09-18 | 2013-01-16 | 河海大学 | Method for detecting quality of large-diameter tubular pile at low strain |
| CN102877490B (en) * | 2012-09-18 | 2014-06-11 | 河海大学 | Method for detecting quality of large-diameter tubular pile at low strain |
| CN104110031A (en) * | 2013-04-22 | 2014-10-22 | 南通市常青建筑安装工程有限公司 | High-bearing-capacity foundation pile and method for processing same and foundation |
| CN104110031B (en) * | 2013-04-22 | 2017-12-26 | 南通市常青建筑安装工程有限公司 | High-bearing capacity foundation pile and its processing method with basis |
| CN103362151A (en) * | 2013-07-30 | 2013-10-23 | 中国化学工程第一岩土工程有限公司 | Method for detecting prestress concrete pipe pile horizontal stress |
| CN103821184A (en) * | 2014-01-27 | 2014-05-28 | 广东省建筑科学研究院 | Stress wave multi-point excitation method and multi-point excitation device for detecting quality of foundation piles |
| CN103821184B (en) * | 2014-01-27 | 2015-11-25 | 广东省建筑科学研究院集团股份有限公司 | A kind of stress wave multi-point exciting method and multi-point exciting device detecting pile quality |
| CN103898928A (en) * | 2014-03-12 | 2014-07-02 | 广东省建筑科学研究院 | Improved high strain method |
| CN104612187A (en) * | 2014-12-31 | 2015-05-13 | 梁夏萍 | Low-strain dynamic monitoring device for underwater pile foundation |
| CN104612187B (en) * | 2014-12-31 | 2015-12-09 | 梁夏萍 | Underwater pile low-strain dynamic measure device |
| CN104727352A (en) * | 2015-02-04 | 2015-06-24 | 水利部交通运输部国家能源局南京水利科学研究院 | Installation method of PHC tubular pile optical fiber strain gauge |
| CN107064473A (en) * | 2017-06-06 | 2017-08-18 | 四川大学 | Circular cross-section self-induction intelligence Multiinputoutput concrete component health monitor method |
| CN107014987A (en) * | 2017-06-06 | 2017-08-04 | 四川大学 | The intelligent Multiinputoutput concrete component health monitor method of square-section self-induction |
| CN107142977A (en) * | 2017-07-10 | 2017-09-08 | 荣垂强 | Low strain dynamic two-speed signal averaging detection method under the percussion of building foundation center |
| CN107782788A (en) * | 2017-10-31 | 2018-03-09 | 中国电力科学研究院有限公司 | A kind of experimental rig of transmission line of electricity poured pile base Pile Integrity Testing |
| CN110552344A (en) * | 2018-06-01 | 2019-12-10 | 北京新桥技术发展有限公司 | Automatic control device for lifting height of guide pipe in pouring process of cast-in-place pile |
| CN108894244A (en) * | 2018-08-14 | 2018-11-27 | 广东电网有限责任公司 | A kind of electric power pylon foundation structure integrality low strain dynamic uplink wave detecting method |
| CN108894244B (en) * | 2018-08-14 | 2019-10-18 | 广东电网有限责任公司 | A kind of electric power pylon foundation structure integrality low strain dynamic uplink wave detecting method |
| CN109208657A (en) * | 2018-10-31 | 2019-01-15 | 湖南湘建检测有限公司 | A kind of low strain dynamic quality testing measuring tool and its test method |
| CN110173005A (en) * | 2019-05-15 | 2019-08-27 | 浙江大学 | The Kong Zhongshuan measuring point low strain integrity test device and method of foundation pile |
| CN111549833A (en) * | 2020-05-11 | 2020-08-18 | 安徽建大交通科技有限公司 | Foundation pile detection method and system and storage medium |
| CN111579355A (en) * | 2020-06-18 | 2020-08-25 | 湖北震泰建设工程质量检测有限责任公司 | Concrete cast-in-place pile static load test unbalance loading monitoring method based on piezoelectric impedance frequency shift |
| CN113833035A (en) * | 2021-09-09 | 2021-12-24 | 浙江永欣联科信息科技股份有限公司 | Existing pile foundation monitoring and early warning system and evaluation method for sea-crossing bridge |
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Application publication date: 20110720 |