CN104532886B - A kind of bored concrete pile pile bottom sediment and pile end groundwork checkout gear and method - Google Patents
A kind of bored concrete pile pile bottom sediment and pile end groundwork checkout gear and method Download PDFInfo
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- CN104532886B CN104532886B CN201410826049.2A CN201410826049A CN104532886B CN 104532886 B CN104532886 B CN 104532886B CN 201410826049 A CN201410826049 A CN 201410826049A CN 104532886 B CN104532886 B CN 104532886B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/08—Investigation of foundation soil in situ after finishing the foundation structure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Structural Engineering (AREA)
- Soil Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of bored concrete pile pile bottom sediment and pile end groundwork checkout gear and method, belong to Construction Quality for Bore Filling Pile detection field, checkout gear comprises filling pile cage of reinforcement, pre-buried sound wave test tube, sonic test instrument and sonic test probe thereof, described pre-buried sound wave test tube is fixed on steel reinforcement cage along bored concrete pile depth direction, its front end leaves distance apart from stake end, is also provided with boring to 2～3 times of stake footpath degree of depth below stake end along pre-buried sound wave test tube direction. Detection method detects concrete pile body, pile bottom sediment and bearing course at pile end in conjunction with ultrasound test result and boring and coring result. The present invention is that a kind of accuracy of detection is high, easy to operate, the apparatus and method of digging bored concrete pile and pile bottom sediment and pile end groundwork are revolved in device structure detection simple and low cost of manufacture, these apparatus and method have been expanded the scope of application of ultrasonic Detection Method, improve the detection of core drilling method to pile bottom sediment, the two can be verified mutually, improve accuracy of detection.
Description
Technical field
The invention belongs to Construction Quality for Bore Filling Pile detection field, be specifically related to one and revolve and dig bored concrete pile and pile bottom sediment thereof and pile end groundwork detects.
Background technology
In order to detect filling concrete quality of pile, evaluation is revolved and is dug bored concrete pile pile body quality, pile bottom sediment, whether bearing course at pile end meets code requirement, after concreting, often to dig a pouring quality and detect revolving, detection method comprises low Strain Method, supercritical ultrasonics technology, core drilling method, wherein low Strain Method, ultrasonic wave is Non-Destructive Testing, be applicable to pile quality detection, core drilling method can detect pile body pouring quality by boring core, pile bottom sediment and bearing course at pile end proterties, it is larger that pile bottom sediment detection reliability is affected by construction level, because causing erroneous judgement, construction level cannot verify.
Low Strain Method in existing detection means, supercritical ultrasonics technology are for detection of pile body integrity, cannot detect pile bottom sediment and bearing course at pile end, core drilling method can be used as detecting pile bottom sediment and bearing course at pile end, but it bores core along whole stake and causes testing cost higher, amount detection is restricted, and pile bottom sediment to detect manually-operated artifical influence factor larger.
Summary of the invention
The object of the invention is to: provide a kind of accuracy of detection high, easy to operate, the apparatus and method of digging bored concrete pile and pile bottom sediment and pile end groundwork are revolved in device structure detection simple and low cost of manufacture, these apparatus and method have been expanded the scope of application of ultrasonic Detection Method, improve the detection of core drilling method to pile bottom sediment, the two can be verified mutually, improve accuracy of detection.
The object of the invention realizes by following technical proposals:
A kind of bored concrete pile pile bottom sediment and pile end groundwork checkout gear, comprise filling pile cage of reinforcement, pre-buried sound wave test tube, sonic test instrument and sonic test probe thereof, described pre-buried sound wave test tube is fixed on steel reinforcement cage along bored concrete pile depth direction, its front end leaves distance apart from stake end, also be provided with boring to 2～3 times of stake footpath degree of depth below stake end along pre-buried sound wave test tube direction, described pre-buried sound wave test tube front end is contained sediment section and one section of top cast-in-place pile concrete section thereof at the bottom of grout pile apart from stake end preset space, described sonic test probe placement also can be along moving up and down to described boring in pipe in pre-buried sound wave test tube.
Adopt the detection method of aforementioned bored concrete pile pile bottom sediment and pile end groundwork checkout gear, it is characterized in that: after cast-in-place pile concrete cast, first adopt rig along pre-buried cement bond logging pipe bit to 2～3 times of stake footpath degree of depth below stake end, utilize described rig to carry out full section and get core, then sonic test probe is holed and is carried out single hole and/or porous ultrasonic test along pre-buried sound wave test tube to below, detects concrete pile body, pile bottom sediment and bearing course at pile end in conjunction with ultrasound test result and boring and coring result:
A, employing are got core method concrete core sample are detected, adopt supercritical ultrasonics technology for detection of pile body integrity, simultaneously by the ultrasonic tesint result to described concrete core sample place concrete segment and the comparison result of this testing result, and do not get the ultrasonic tesint result of the concrete segment of core, calculate the compression strength of the concrete segment of not getting core;
B, employing are got core method pile bottom sediment section core are detected, and determine pile bottom sediment section sediment thickness by ultrasonic wave;
C, employing are got core method soil layer core under stake end are detected.
As selection, also by the weathering index of the rock stratum of soil layer under ultrasound examination stake end.
In such scheme, described in get core method and supercritical ultrasonics technology adopts existing method, as content in " architecture foundation pile inspection specifications " JGJ106.
Wherein, supercritical ultrasonics technology can be determined pile bottom sediment section sediment thickness according to test section parameters,acoustic difference.
Wherein, for supercritical ultrasonics technology with get core method and compare, thereby calculate the method for the compression strength of the concrete segment of not getting core, specifically can adopt linear fitting or comprehensive analogy method to determine.
For a fairly large number of situation of test, can select linear fitting: adopt and detect concrete crushing strength and the parameters,acoustic of getting core section simultaneously, set up the functional relation of the two by the method for linear fit, then according to this functional relation with do not get the parameters,acoustic of the concrete segment of core, obtain the intensity presumed value of the concrete segment of not getting core.
And test quantity is few, situation is next can select comprehensive analogy method: with reference to the fitting function relation of the existing aforementioned linear fitting of other similar engineerings, then according to existing supercritical ultrasonics technology with get core method data, ask calculation.
Beneficial effect of the present invention: because rig only creeps into pre-buried sound wave test tube front end to following 2～3 times of stake footpath distances of stake end, the distance that prior art core drilling method bores core along whole stake relatively shortens greatly, testing cost declines greatly thus, and adopts comparison scaling method to solve the test problems of not getting core section concrete; And simultaneously, because rig has crept into below stake end, greatly widen again the detection range of supercritical ultrasonics technology, thereby make can only survey along pre-buried sound wave test tube in prior art the supercritical ultrasonics technology of pile body, can further survey inspection pile bottom sediment and bearing course at pile end, and then utilize supercritical ultrasonics technology and core drilling method in conjunction with having improved detectability, both can gain mutually, realize thus the effect of achieving many things at one stroke:
1) utilize the fixing sonic tube apart from stake end certain distance of filling pile cage of reinforcement, avoid stake bottom sonic tube to damage;
2) utilize rig to drill the doubly stake footpath degree of depth of pre-buried sonic tube bottom concrete 2-3, and get a core and core carries out compression test;
3) utilize boring to carry out ultrasonic test, inspection stake bottom pile quality, sediment and supporting course;
4) utilize rear deep drill to have improvement ultrasonic wave can not accurately check the defect of pile bottom sediment and bearing course at pile end;
5) utilize and get core resistance to compression detection and ultrasound test result contrast raising sonic detection accuracy;
6) expanded the scope of application of ultrasound examination and improved its accuracy;
7) different soil strong adaptability, technique is simple, reduces testing cost.
Brief description of the drawings
Fig. 1 is the pre-buried sound wave test tube arrangement schematic diagram of the embodiment of the present invention;
Fig. 2 is the boring arrangement schematic diagram of the embodiment of the present invention;
Fig. 3 is the sonic test Probe arrangement structural representation of the embodiment of the present invention;
Fig. 4 is the testing process schematic diagram of the embodiment of the present invention;
Wherein 1 is that bored concrete pile, 2 is held for stake for bearing course at pile end, 11 for pile bottom sediment, 7 for boring, 6 for sonic test probe, 5 for sonic test instrument, 4 for pre-buried sound wave test tube, 3.
Detailed description of the invention
Following non-limiting examples is used for illustrating the present invention.
Shown in 3, a kind of bored concrete pile pile bottom sediment and pile end groundwork checkout gear, comprise bored concrete pile 1, pre-buried sound wave test tube 2, sonic test instrument 3 and sonic test probe 4 thereof, pre-buried sound wave test tube 2 is fixed on steel reinforcement cage along bored concrete pile 1 depth direction, its front end leaves certain distance apart from stake end 11, also be provided with boring 5 to stake end 2～3 times of stake footpath degree of depth below 11 along pre-buried sound wave test tube 2 directions, pre-buried sound wave test tube 2 front ends hold 11 preset spaces to contain sediment section and one section of top cast-in-place pile concrete section thereof at the bottom of grout pile apart from stake, sonic test probe 4 is positioned in pre-buried sound wave test tube 2 and can be along moving up and down to holing in 5 in pipe.
Shown in figure 4, adopt the detection method of aforementioned bored concrete pile pile bottom sediment and pile end groundwork checkout gear, after bored concrete pile 1 pouring concrete, first adopt rig to be drilled into stake end 2～3 times of stake footpath degree of depth below 11 along pre-buried sound wave test tube 2, utilize rig to carry out full section and get core, then sonic test probe 4 along pre-buried sound wave test tube 2 to below boring 5 carry out single hole (two a receipts) and/or porous (single-shot list receipts) ultrasonic test, in conjunction with ultrasound test result and boring and coring result detection concrete pile body, pile bottom sediment 6 and bearing course at pile end 7:
A, adopt and get core method and continue to use existing detection mode concrete core sample is detected to (carrying out indoor compressive strength test), adopt supercritical ultrasonics technology to continue to use existing detection mode for detection of pile body integrity, simultaneously by the ultrasonic tesint result to concrete core sample place concrete segment and the comparison result of this testing result, and do not get the ultrasonic tesint result of the concrete segment of core, calculate the compression strength of the concrete segment of not getting core;
B, adopt and get core method and continue to use existing detection mode pile bottom sediment section core is detected to (mainly differentiating sediment proterties), determine pile bottom sediment section sediment thickness by ultrasonic wave;
C, adopt and get core method and continue to use existing detection mode soil layer core under stake end is detected to (carrying out indoor compressive strength test), also can be by the weathering index of the rock stratum of soil layer under ultrasound examination stake end.
Wherein, get the detection separately of core method and supercritical ultrasonics technology and all can continue to use existing various detection mode.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. bored concrete pile pile bottom sediment and pile end groundwork detection method, comprise bored concrete pile pile bottom sediment and pile end groundwork checkout gear, this device comprises filling pile cage of reinforcement, pre-buried sound wave test tube, sonic test instrument and sonic test probe thereof, described pre-buried sound wave test tube is fixed on steel reinforcement cage along bored concrete pile depth direction, its front end leaves distance apart from stake end, also be provided with boring to 2～3 times of stake footpath degree of depth below stake end along pre-buried sound wave test tube direction, described pre-buried sound wave test tube front end is contained sediment section and one section of top cast-in-place pile concrete section thereof at the bottom of grout pile apart from stake end preset space, described sonic test probe placement also can be along moving up and down to described boring in pipe in pre-buried sound wave test tube, it is characterized in that: after cast-in-place pile concrete cast, first adopt rig along pre-buried cement bond logging pipe bit to 2～3 times of stake footpath degree of depth below stake end, utilize described rig to carry out full section and get core, then sonic test probe is holed and is carried out single hole and/or porous ultrasonic test along pre-buried sound wave test tube to below, detect concrete pile body in conjunction with ultrasound test result and boring and coring result, pile bottom sediment and bearing course at pile end:
A, employing are got core method concrete core sample are detected, adopt supercritical ultrasonics technology to detect pile body integrity, simultaneously by the ultrasound test result to described concrete core sample place concrete segment and the comparison result of this testing result, and do not get the ultrasound test result of the concrete segment of core, calculate the compression strength of the concrete segment of not getting core;
B, employing are got core method pile bottom sediment section core are detected, and determine pile bottom sediment section sediment thickness by ultrasonic wave;
C, employing are got core method soil layer core under stake end are detected.
2. bored concrete pile pile bottom sediment as claimed in claim 1 and pile end groundwork detection method, is characterized in that: also by the weathering index of the rock stratum of soil layer under ultrasound examination stake end.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105275024B (en) * | 2015-09-29 | 2017-10-20 | 华蓝设计（集团）有限公司 | Defective Big-Diameter Rock-Embedded Pile vertical bearing capacity detection and the method reinforced |
| CN105672381B (en) * | 2016-04-12 | 2018-08-03 | 西南石油大学 | A kind of ultrasonic wave pile bottom sediment thickness detection apparatus and detection method |
| CN106223375B (en) * | 2016-09-20 | 2017-12-29 | 广州聚散流沙科技有限公司 | Pre-buried type pile end groundwork detecting system |
| CN107288162B (en) * | 2017-07-18 | 2023-05-16 | 广州广检建设工程检测中心有限公司 | Device and method for detecting pile bottom sediment thickness of bored concrete pile |
| CN111456114B (en) * | 2019-01-21 | 2022-05-13 | 广州市市政工程试验检测有限公司 | Method for detecting thickness of pile body steel bar protection layer |
| CN111042096B (en) * | 2019-12-24 | 2021-05-11 | 河海大学 | Rapid detection and evaluation method for light soil subgrade |
| CN112505157A (en) * | 2020-10-09 | 2021-03-16 | 重庆北纬建设工程质量检测有限公司 | Technical process for detecting quality of address pile foundation rock soil |
| CN112881656B (en) * | 2021-03-02 | 2023-03-24 | 中国建筑西南勘察设计研究院有限公司 | Method for testing corrosion rate and crack connectivity of concealed soluble rock |
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| JPS57100306A (en) * | 1980-12-13 | 1982-06-22 | Nippon Doro Kodan | Method for measuring buried pile length |
| CN1077287A (en) * | 1992-04-08 | 1993-10-13 | 广州市建筑科学研究设计所 | Ultrasonic detection method for concrete piles |
| JP2003028622A (en) * | 2001-07-13 | 2003-01-29 | Fujita Corp | Method for measuring shape of structure and method for measuring degradation/damage |
| CN102364336A (en) * | 2011-04-29 | 2012-02-29 | 武汉华和机电技术有限公司 | Ultrasonic wave sensor for pile supersonic wave detection |
| US20130220017A1 (en) * | 2012-02-23 | 2013-08-29 | Sung Kim | Non-destructive inspection apparatus for detecting internal defect of concrete structure using ultrasonic waves |
| CN203100704U (en) * | 2013-01-31 | 2013-07-31 | 中国地质大学（武汉） | Pressed pile shape and pile length ultrasonic detection device |
| CN203551516U (en) * | 2013-10-30 | 2014-04-16 | 天津市建联工程勘测有限公司 | Device for detecting integrality of pile body by using low strain method |
| CN204401664U (en) * | 2014-12-26 | 2015-06-17 | 中国建筑西南勘察设计研究院有限公司 | A kind of castinplace pile pile bottom sediment and pile end groundwork checkout gear |
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