CN201177585Y - Pile foundation high strain detection device - Google Patents

Pile foundation high strain detection device Download PDF

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Publication number
CN201177585Y
CN201177585Y CN 200820079890 CN200820079890U CN201177585Y CN 201177585 Y CN201177585 Y CN 201177585Y CN 200820079890 CN200820079890 CN 200820079890 CN 200820079890 U CN200820079890 U CN 200820079890U CN 201177585 Y CN201177585 Y CN 201177585Y
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China
Prior art keywords
pile
foundation
sensing device
engine
strain
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Expired - Lifetime
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CN 200820079890
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Chinese (zh)
Inventor
苏荣臻
鲁先龙
刘华清
郑卫锋
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China Electric Power Research Institute Co Ltd CEPRI
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BEIJING ELECTRIC POWER CONSTRUCTION RESEARCH INSTITUTE OF SGCC
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Priority to CN 200820079890 priority Critical patent/CN201177585Y/en
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Publication of CN201177585Y publication Critical patent/CN201177585Y/en
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Abstract

The utility model relates to a high-strain pile foundation detection device, which comprises a pile driver for transferring force between a heavy hammer and a foundation pile, and two pairs of sensors symmetrically arranged on the surface of the pile driver and fixedly connected with the pile driver. By arranging the pile driver for transferring force between the heavy hammer and the foundation pile and the two pairs of sensors symmetrically arranged on the surface of the pile driver, the high-strain pile foundation detection device can be directly arranged between the heavy hammer and the foundation pile to be detected while detecting the engineering quality of the pile foundation. The high-strain pile foundation detection device has the advantages of simple and convenient installation, low construction cost and high practicability, and can be applied to high-strain dynamic detection method to improve the accuracy of the detected data.

Description

The high strain-Sensing device of pile foundation
Technical field
The utility model relates to construction engineering technical field, particularly relates to the high strain-Sensing device of a kind of pile foundation.
Background technology
When the pile foundation engineering quality testing, adopt the high stress drive detection method that foundation pile vertical compression bearing capacity and pile construction integrity in the pile foundation are detected usually.Adopt in the high stress drive detection method testing process, the technician need excavate out the foundation pile pile crown, and the acceleration transducer that the high stress drive detection method is used and strain force sensor are installed in the stake side surface place apart from the two times of foundation pile diameters in stake top.In addition, when changing to other foundation piles and detect, need reinstall acceleration transducer and strain force sensor.The inventor finds that there is following defective at least in prior art in realizing process of the present invention:
1, install before existing acceleration transducer and the strain force sensor, need excavate out the pile crown of foundation pile, also need carry out consolidation process the pile crown behind the excavation, and comparatively loaded down with trivial details to the consolidation process of the part of the pile crown behind the excavation, increased the testing amount.
2, install before acceleration transducer and the strain force sensor, also need the pile crown that excavates and consolidation process is good is partly polished, on the flat surface after the grinding process, fixedly mount acceleration transducer and strain force sensor by expansion bolt.Do not install when tight as the surface irregularity after the grinding process and/or expansion bolt, will influence pick-up unit and obtain valid data, thereby influence the accuracy of data.
The utility model content
The purpose of this utility model provides the high strain-Sensing device of a kind of pile foundation, in order to realize convenient the installation, improves the technique effect of detection efficiency.
To achieve these goals, the utility model provides a kind of pile foundation high strain-Sensing device, be included in and carry out the pile engine that power is transmitted between weight and the foundation pile, the surface of described pile engine is symmetrically arranged with two pairs of sensors, and described sensor is fixedlyed connected with described pile engine.
On the basis of technique scheme, every pair of described sensor can comprise an acceleration transducer and a strain force sensor.Described acceleration transducer and strain force sensor can be arranged on the surface apart from the pile engine of the two times of pile engine diameters of pile engine end face or the length of side.Also can be provided with bolt hole on the described pile engine, described sensor adopts bolt to fixedly connected with described pile engine by described bolt hole.Can align with described strain force sensor central horizontal in the center of described acceleration transducer.Preferably, the distance between the center of described acceleration transducer and the described strain force sensor center is 6cm~8cm.
On the basis of technique scheme, the bottom of described pile engine can be the hat bottom, and described hat bottom comprises fixedly connected crown and shade.Preferably, the length of described shade is 40cm~80cm.
In the high strain-Sensing device of the pile foundation that the utility model proposes, can between weight and foundation pile to be detected, carry out the pile engine that power is transmitted by being provided with, and be symmetrical arranged two pairs of sensors on the pile engine surface, every pair of sensor can comprise an acceleration transducer and a strain force sensor, makes the high strain-Sensing device of application pile foundation of the present utility model carry out the pile foundation engineering quality testing and has following advantage at least:
1, the high strain-Sensing device of pile foundation is installed simple: in actual pile foundation engineering quality testing process, directly the high strain-Sensing device of pile foundation is arranged between weight and the foundation pile to be measured, the high strain-Sensing device of pile foundation does not need foundation pile pile crown to be detected is partly excavated and the pile crown that has excavated is carried out consolidation process, therefore the high strain-Sensing device of pile foundation has saved the pile crown part of excavating foundation pile to be detected and the construction working amount of the pile crown that has excavated being carried out consolidation process, improved operating efficiency, the high strain-Sensing device of pile foundation is installed simple, convenient, construction cost is low, and is practical;
2, the high strain-Sensing device of pile foundation is applied in the high stress drive detection method, the detection data that obtain are accurate: because the high strain-Sensing device of pile foundation is provided with pile engine, and set in advance sensor (for example: acceleration transducer and strain force sensor) on the surface of pile engine, therefore, can guarantee that sensor mounting surface is smooth and it is tight to install, thereby guarantee to adopt the high stress drive detection method to detect the accuracy of data.
Description of drawings
Fig. 1 is the high strain-Sensing device first example structure synoptic diagram of the utility model pile foundation;
Fig. 2 is the high strain-Sensing device first embodiment cross-sectional view of the utility model pile foundation;
Fig. 3 is the high strain-Sensing device second example structure synoptic diagram of the utility model pile foundation;
Fig. 4 is the high strain-Sensing device second embodiment cross-sectional view of the utility model pile foundation;
Fig. 5 is the utility model pile foundation detection system structural representation.
Description of reference numerals:
The 11-pile engine; The 12-sensor; The 121-acceleration transducer;
The 122-strain force sensor; The 123-bolt hole; 13-hat bottom;
The 131-crown; The 132-shade; The 2-ram engine;
The 21-weight; The 3-foundation pile; 4-ground;
The 5-analytical equipment.
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Fig. 1 is the high strain-Sensing device first example structure synoptic diagram of the utility model pile foundation.Fig. 2 is the high strain-Sensing device first embodiment cross-sectional view of the utility model pile foundation.As depicted in figs. 1 and 2, the high strain-Sensing device of the utility model pile foundation comprises pile engine 11 and two pairs of sensors 12.Sensor 12 is symmetricly set on the surface of pile engine 11.Improve the accuracy that sensor obtains data for making, pile engine 11 need be a flat surface with the junction of sensor 12.Sensor 12 is fixedlyed connected with pile engine 11, and for example: sensor 12 can be bolted to connection on the flat surface of pile engine 11.
In actual pile foundation engineering quality testing process, the high strain-Sensing device of pile foundation is arranged between weight and the foundation pile to be measured, and sensor 12 adopts data line to be connected with external analysis equipment.In testing process, the power that the high strain-Sensing device of pile foundation applies weight by pile engine 11 passes to foundation pile to be measured, be symmetricly set on pile engine 11 lip-deep two pairs of sensors 12 and obtain the relevant detection data, and the detection data that will obtain send the external analysis equipment that is connected with sensor 12 to, external analysis equipment is analyzed accordingly to detecting data, can obtain the quality information of foundation pile to be measured.
Fig. 3 is the high strain-Sensing device second example structure synoptic diagram of the utility model pile foundation.Fig. 4 is the high strain-Sensing device second embodiment cross-sectional view of the utility model pile foundation.As shown in Figure 3 and Figure 4, the difference of high strain-Sensing device first embodiment of present embodiment and the utility model pile foundation is, comprises an acceleration transducer 121 and a strain force sensor 122 in the present embodiment in the pair of sensors 12 at least.Acceleration transducer 121 and strain force sensor 122 are fixedly installed on the flat surface of pile engine 11.Two ends of strain force sensor 122 are respectively arranged with a bolt hole 123, the center of acceleration transducer 121 is provided with a bolt hole 123, the relevant position of the flat surface of pile engine 11 also is provided with bolt hole 123, and strain force sensor 122 and acceleration transducer 121 adopt bolt to be fixedly connected on the flat surface of pile engine by bolt hole 123 respectively.Preferably, acceleration transducer 121 and strain force sensor 122 can be arranged on from the surface of the pile engine 11 of pile engine two times of pile engine 11 diameters in 11 tops or the length of side, are respectively applied for stake top speed wave and the Reeb, stake top of detecting foundation pile.Further, acceleration transducer 121 and strain force sensor 122 parallel and center-aligned, the center distance 6cm~8cm of the center of acceleration transducer 121 and strain force sensor 122.
The high strain-Sensing device of present embodiment pile foundation is in actual pile foundation quality testing process, be arranged between weight and the foundation pile to be measured, therefore, in order to make the high strain-Sensing device of present embodiment pile foundation be connected, the bottom design of pile engine 11 can be become hat bottom 13 with the foundation pile consolidation.This hat top 13 can specifically comprise crown 131 and shade 132.Preferably, the length of shade is 40cm~80cm.Crown 131 is fixedlyed connected with the main body of pile engine 11, in testing process, the stake top of foundation pile 3 to be measured is connected with crown 131, shade 132 be distributed in foundation pile to be measured around, when effectively having avoided the weight off-centre application of force, the high strain-Sensing device of pile foundation improves the security of testing process from the danger of foundation pile to be measured top landing.
The principle of work of the high strain-Sensing device of pile foundation is described below by an application example of the high strain-Sensing device of the utility model pile foundation.Fig. 5 is the utility model pile foundation detection system structural representation.Pile foundation detection system shown in Figure 5 comprises the high strain-Sensing device of the utility model pile foundation, and concrete application scenarios can be: adopt the high stress drive detection method in the pile foundation quality engineering, the vertical compression bearing capacity and the pile body integrity of foundation pile detected.As shown in Figure 5, this pile foundation detection system comprises the high strain-Sensing device of pile foundation, ram engine 2 and foundation pile 3.Ram engine 2 is provided with weight 21.The main body of foundation pile 3 has been imbedded underground in the piling work work progress, and the part pile crown of foundation pile 3 bassets 4.The high strain-Sensing device of pile foundation is arranged between weight 21 and the foundation pile 3, and pile engine 11 is fixedlyed connected with the stake top portion that foundation pile 3 bassets.The hammer force that weight 21 applies straight down is applied on the pile engine 11, and pile engine 11 passes to foundation pile 3 with this hammer force, until foundation pile being squeezed into default absolute altitude.In the process of ram engine piling, be arranged on the signal that pile engine 11 lip-deep sensors 12 (as: acceleration transducer and strain force sensor) receive foundation pile 3 reflections, this signal can comprise the stake Reeb, top and the speed wave of foundation pile.Sensor 12 sends to outside analytical equipment 5 by data line with the signal that obtains.Outside analytical equipment is carried out wave form analysis according to the wave equation theory of travelling wave to stake Reeb, top and speed wave that detection obtains, thereby obtains the bearing capacity of this foundation pile.Because high strain detecting method excitation energy and detection significant depth are big, thereby when judging the defectives such as the integrated slit of pile body of foundation pile, can find out whether these defectives influence the vertical compression bearing capacity of foundation pile, and rationally judge the defect level of foundation pile.
In order to guarantee the integrity of the high strain-Sensing device of pile foundation in the piling process, should select the material of the high strain-Sensing device of pile foundation according to the strength of materials of foundation pile in the concrete construction environment, pile engine 11 strengths of materials should be greater than the strength of materials of foundation pile pile body to be measured, for example: if the material of foundation pile pile body to be measured is the concrete of C30, then the material selected for use of pile engine 11 is required to be concrete or the other materials of intensity greater than C30.
In the high strain-Sensing device of the pile foundation that the utility model proposes, can between weight and foundation pile to be detected, carry out the pile engine that power is transmitted by being provided with, and be symmetrical arranged two pairs of acceleration transducers and strain force sensor on the pile engine surface, make that using the high strain-Sensing device of pile foundation of the present utility model carries out the pile foundation engineering quality testing and have following advantage at least:
1, the high strain-Sensing device of pile foundation is installed simple: in actual pile foundation engineering quality testing process, directly the high strain-Sensing device of pile foundation is arranged between weight or the foundation pile to be measured, the high strain-Sensing device of pile foundation does not need foundation pile pile crown to be detected is partly excavated and the pile crown that has excavated is carried out consolidation process, therefore the high strain-Sensing device of pile foundation has saved the pile crown part of excavating foundation pile to be detected and the construction working amount of the pile crown that has excavated being carried out consolidation process, improved operating efficiency, the high strain-Sensing device of pile foundation is installed simple, convenient, construction cost is low, and is practical;
2, the high strain-Sensing device of pile foundation is applied in the high stress drive detection method, the detection data that obtain are accurate: because the high strain-Sensing device of pile foundation is provided with pile engine, and set in advance sensor (for example: acceleration transducer and strain force sensor) on the surface of pile engine, therefore, can guarantee that sensor mounting surface is smooth and it is tight to install, thereby guarantee to adopt the high stress drive detection method to detect the accuracy of data.
The utility model can be used as an independently high strain-Sensing device of pile foundation, also can be set to the part of ram engine; Sensor is detachable or the like in the high strain-Sensing device of pile foundation, and the technical scheme of these distortion is carried out the implementation that pile foundation detects in the piling process similar to the aforementioned embodiment, do not giving unnecessary details.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of the utility model embodiment technical scheme.

Claims (8)

1, the high strain-Sensing device of a kind of pile foundation is characterized in that, is included in to carry out the pile engine that power is transmitted between weight and the foundation pile, and the surface of described pile engine is symmetrically arranged with two pairs of sensors, and described sensor is fixedlyed connected with described pile engine.
2, the high strain-Sensing device of pile foundation according to claim 1 is characterized in that, every pair of described sensor comprises an acceleration transducer and a strain force sensor in described two pairs of sensors.
3, the high strain-Sensing device of pile foundation according to claim 2 is characterized in that, described acceleration transducer and strain force sensor are arranged on the surface apart from the pile engine of the two times of pile engine diameters of pile engine end face or the length of side.
4, the high strain-Sensing device of pile foundation according to claim 3 is characterized in that, also is provided with bolt hole on the described pile engine, and described sensor adopts bolt to fixedly connected with described pile engine by described bolt hole.
5, the high strain-Sensing device of pile foundation according to claim 4 is characterized in that, aligns with described strain force sensor central horizontal in the center of described acceleration transducer.
6, the high strain-Sensing device of pile foundation according to claim 5 is characterized in that, the distance between the center of described acceleration transducer and the described strain force sensor center is 6cm~8cm.
According to the high strain-Sensing device of the described arbitrary pile foundation of claim 1~6, it is characterized in that 7, the bottom of described pile engine is the hat bottom, described hat bottom comprises fixedly connected crown and shade.
8, the high strain-Sensing device of pile foundation according to claim 7 is characterized in that, the length of described shade is 40cm~80cm.
CN 200820079890 2008-04-11 2008-04-11 Pile foundation high strain detection device Expired - Lifetime CN201177585Y (en)

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Application Number Priority Date Filing Date Title
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102268886A (en) * 2010-06-04 2011-12-07 中国海洋石油总公司 Method for detecting and evaluating design bearing capacity of pile foundation of offshore oil platform
CN102877490A (en) * 2012-09-18 2013-01-16 河海大学 Method for detecting quality of large-diameter tubular pile at low strain
CN103088848A (en) * 2012-11-23 2013-05-08 中国电力科学研究院 Installation auxiliary equipment of high-strain sensor
CN103437355A (en) * 2013-08-22 2013-12-11 上海建工集团股份有限公司 Device and method for recording hammered times of precast pile automatically
CN104196065A (en) * 2014-09-27 2014-12-10 上海岩联工程技术有限公司 Wireless intelligent high strain sensor and wireless intelligent high strain detection method
CN105040750A (en) * 2015-07-31 2015-11-11 河海大学 Pile foundation length testing method based on thermal response
CN106323774A (en) * 2016-11-14 2017-01-11 山东祺龙海洋石油钢管股份有限公司 Marine riser pile driving operation hammering test device and test method
CN112012253A (en) * 2020-08-29 2020-12-01 东南大学 Split type fast loading method pile foundation detection device and method thereof
CN112012254A (en) * 2020-08-29 2020-12-01 东南大学 Pile foundation comprehensive detection method based on unloading point method
CN112443000A (en) * 2020-11-24 2021-03-05 中冶建设高新工程技术有限责任公司 High strain detection device
CN113235672A (en) * 2021-05-07 2021-08-10 中国铁建港航局集团有限公司 Sensor installation method for pile foundation detection
CN113404095A (en) * 2021-04-12 2021-09-17 昆山求正工程质量检测有限公司 Detection equipment and detection method for high strain of foundation pile

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102268886B (en) * 2010-06-04 2013-08-14 中国海洋石油总公司 Method for detecting and evaluating design bearing capacity of pile foundation of offshore oil platform
CN102268886A (en) * 2010-06-04 2011-12-07 中国海洋石油总公司 Method for detecting and evaluating design bearing capacity of pile foundation of offshore oil platform
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
CN103088848A (en) * 2012-11-23 2013-05-08 中国电力科学研究院 Installation auxiliary equipment of high-strain sensor
CN103088848B (en) * 2012-11-23 2015-07-22 中国电力科学研究院 Installation auxiliary equipment of high-strain sensor
CN103437355B (en) * 2013-08-22 2015-09-09 上海建工集团股份有限公司 A kind of devices and methods therefor of automatic record preformed pile hammer number
CN103437355A (en) * 2013-08-22 2013-12-11 上海建工集团股份有限公司 Device and method for recording hammered times of precast pile automatically
CN104196065B (en) * 2014-09-27 2016-07-06 上海岩联工程技术有限公司 A kind of intelligent wireless Large strain sensor and wireless high strain monitoring method
CN104196065A (en) * 2014-09-27 2014-12-10 上海岩联工程技术有限公司 Wireless intelligent high strain sensor and wireless intelligent high strain detection method
CN105040750A (en) * 2015-07-31 2015-11-11 河海大学 Pile foundation length testing method based on thermal response
CN106323774A (en) * 2016-11-14 2017-01-11 山东祺龙海洋石油钢管股份有限公司 Marine riser pile driving operation hammering test device and test method
CN106323774B (en) * 2016-11-14 2019-03-19 山东祺龙海洋石油钢管股份有限公司 Marine riser piling work Hammering Test device and test method
CN112012253A (en) * 2020-08-29 2020-12-01 东南大学 Split type fast loading method pile foundation detection device and method thereof
CN112012254A (en) * 2020-08-29 2020-12-01 东南大学 Pile foundation comprehensive detection method based on unloading point method
CN112012254B (en) * 2020-08-29 2021-08-03 东南大学 Pile foundation comprehensive detection method based on unloading point method
CN112443000A (en) * 2020-11-24 2021-03-05 中冶建设高新工程技术有限责任公司 High strain detection device
CN113404095A (en) * 2021-04-12 2021-09-17 昆山求正工程质量检测有限公司 Detection equipment and detection method for high strain of foundation pile
CN113404095B (en) * 2021-04-12 2022-03-01 昆山求正工程质量检测有限公司 Detection equipment and detection method for high strain of foundation pile
CN113235672A (en) * 2021-05-07 2021-08-10 中国铁建港航局集团有限公司 Sensor installation method for pile foundation detection

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Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE

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Effective date: 20090724

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Address after: Beijing City, Haidian District small business Qinghe Road No. 15 Chinese Electric Power Research Institute of the Ministry of science and technology, zip code: 100192

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Address before: Beijing City, Xuanwu District Guang'an South Binhe Road 33, zip code: 100055

Patentee before: Beijing Electric Power Construction Research Institute of SGCC

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Granted publication date: 20090107