CN104314114B - Pile foundation low-strain dynamic tester capable of being used in underwater high-pressure environment - Google Patents
Pile foundation low-strain dynamic tester capable of being used in underwater high-pressure environment Download PDFInfo
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- CN104314114B CN104314114B CN201410647125.3A CN201410647125A CN104314114B CN 104314114 B CN104314114 B CN 104314114B CN 201410647125 A CN201410647125 A CN 201410647125A CN 104314114 B CN104314114 B CN 104314114B
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- stress wave
- hammer
- wave receiving
- housing
- left cavity
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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
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
Abstract
The invention discloses a pile foundation low-strain dynamic tester capable of being used in underwater high-pressure environment, which integrates a driving hammer and a stress wave receiving probe in a stress wave generation receiving device, simultaneously realizes the automation of the falling and the folding of the driving hammer, leads the axis of the gravity center of the stress wave generation receiving device to be positioned on the stress wave receiving probe through a balancing weight, and the lower end of the stress wave receiving probe to be provided with a gelatinous adhesive layer, thus leading the stress wave receiving probe to be connected with a pile at the lower part by a medium without manually pressing the stress wave receiving probe. The invention can effectively overcome the influence of the underwater high-pressure environment, can complete the low-strain detection of the pile foundation under the underwater high-pressure environment without underwater operation of operators, greatly saves the test cost, and has the advantages of accurate test and convenient use.
Description
Technical field
The present invention relates to the technical field of pile measurement, particularly relate to the pile measurement device be applicable to wet hyperbaric environment, specifically, be a kind of low-strain foundation pile dynamic tester that can be used for wet hyperbaric environment.
Background technology
Large-section in-situ concrete pile is widely adopted because of advantages such as bearing capacity are high, construction noise is little, it be typically by after hand excavation or rig pore-forming at underground or underwater grouting pile, its quality is affected by many factors such as construction technologies, especially concrete pouring operation and is difficult to control to, therefore the quality problems of pile foundation generally exist, as blocked up in sediment, pile body is uneven (local folder mud, isolation, honeycomb etc.).So, before carrying out next process, it is necessary to concrete piles weight and integrity are detected and evaluate, the underwater pile platform of the most such as offshore pile foundation platform.Offshore pile foundation platform is by Texas deck, lower guide pipe support and passes jacket leg and squeezes into the pile foundation in seabed and form.Owing to being chronically in severe marine environment, these piling strtuctures are constantly corroded and are destroyed, the long term of wind, wave, stream and ice load, the pile foundation motion that wave causes, the reasons such as the corrosion of rod member, the naughty erosion of sea bed, and the apposition growth of marine growth all can affect the bearing capacity of stake；And all load that offshore pile foundation platform is subject to all are undertaken by pile foundation, so the quality of piling can directly affect the safety of jacket platform, once have an accident, will result in serious casualties and platform globality is damaged, so the detection to this type of underwater pile is particularly important.
In general house pile measurement, pile defect is spot-check by the general mode using sampling observation, then uses every mode that must examine to detect in ocean or fluviatic pile foundation.The detection mode that test for static load combines generally is used with low-strain measurement during to general house detection of pier foundation bearing capacity.Low-strain measurement is, by low-strain dynamic measure instrument, pile body is carried out stress wave detection, is analyzed the stress wave returned thus carries out a kind of test of the work such as pile defect type and the determination of position, the check and correction of construction stake length and the qualitative estimation of strength grade of concrete.But, existing low-strain dynamic measure instrument is not appropriate in deep water using, on the one hand it is due to when using dynamic tester detection, it is generally required to two people coordinate, probe is pressed against on pile crown by one people, and another hands hand hammer or power hammer tap stake top and produce stress wave, and the preliminary judgment curves of display of the other people pile integrity tester by being connected with probe is the most qualified, and record corresponding pile No., recycle special software and data are further analyzed；On the other hand, in deepwater high-pressure environment, low strain dynamic operation not only cost of labor is high, operation component difficulty is big to use artificial diving to carry out, and dynamic tester probe can cause sensor sensitivity to decline by water leaking-in under deepwater high-pressure, the low strain dynamic curve distortion pounded out is mixed and disorderly, poor effect.Expensive cost of labor, the highly difficult and poor Detection results of detection seriously limit the application in ocean and sea, river pile measurement of the low-strain dynamic measure instrument.
Summary of the invention
The technical problem to be solved is for the above-mentioned state of the art, there is provided a kind of rationally to assemble to save labour turnover by hammering and detection device, and without operator's underwater performance, and can effectively overcome the low-strain foundation pile dynamic tester being applicable to wet hyperbaric environment of detection obstacle that wet hyperbaric environment brings.
The present invention solves the technical scheme that above-mentioned technical problem used:
A kind of low-strain foundation pile dynamic tester that can be used for wet hyperbaric environment, including data processor, data processor is connected by watertight line has stress wave to occur to receive device, stress wave occurs to receive device and includes hammer and stress wave receiving transducer, wherein: stress wave occurs to receive device and is provided with an inner chamber body, this inner chamber body is divided into left cavity and right cavity by waterproof interlayer, left cavity lower openings, hammer is placed in left cavity, stress wave receiving transducer is placed in right cavity, the bottom laminating of stress wave receiving transducer is equipped every briquetting, include every pressure hard layer and laminating gelatinous layer every briquetting, fixing with the laminating of stress wave receiving transducer every pressure hard layer, laminating gelatinous layer side bonds with every pressure hard layer, opposite side extends to outside the housing that stress wave occurs to receive device, coordinate with housing seal conflict every pressure hard layer；Right cavity is provided with balancing weight and the damping layer of the vibration isolation for being transmitted with left cavity by stress wave receiving transducer；Left cavity is built-in with driving motor and by driving motor-driven cylinder and gear block, the hammer handle of hammer stretches in cylinder and can move up and down under the promotion of cylinder, the tup of hammer is connected with hammer handle and can stretch out housing under the promotion of hammer handle, fixture block it is provided with on hammer handle, it is provided with retractable screens on gear block protruding, fixture block can be blocked when screens projection is stretched out and make hammer to fall；Being provided with sealing flange in the middle part of left cavity, sealing flange is provided with sealing floating ring with the hammer handle place of cooperation；Data processor includes controller, and controller controls to drive the running of motor and protruding the stretching of screens.
For optimizing technique scheme, the concrete measure taked also includes:
Being provided with flexible water partition film between above-mentioned left cavity bottom and tup, flexible water partition film and housing, tup are collectively forming seal combination and prevent water under high pressure from entering left cavity.
Above-mentioned inner chamber body top is filled with glue-line, and glue-line parcel stretches into the junction of the watertight line in housing seal casinghousing and watertight line.
Above-mentioned inscribe in the middle part of briquetting is formed with sealing dogging shoulder, seals dogging shoulder top and is pressed on lower housing portion.
The junction of above-mentioned housing, sealing dogging shoulder and stress wave receiving transducer is provided with sealing ring.
Above-mentioned glue-line is epoxy AB glue.
Compared with prior art, hammer and stress wave receiving transducer are integrated into a stress wave and occur to receive in device by the present invention, it is simultaneously achieved the automatization that hammer falls and packs up, stress wave is made to occur the axis receiving the center of gravity of device on stress wave receiving transducer by balancing weight, when stress wave occurs reception device to fall stake top, it is fixed on stake top by deadweight, controls to drive motor to operate by controller, hammer is made to tap stake top, it is achieved stress wave signal collection.The whole gatherer process of stress wave signal is completed by the dynamic tester of the present invention, without underwater operation personnel, only needing operating personnel to carry out the debugging of data processor at surface platform, completing the single operating personnel of whole low-strain measurement can complete, and is greatly saved testing cost.There is to receive device and have employed many places and seal and arrange in the stress wave of the present invention, it is ensured that its under water environment under high pressure can normally work.At left cavity, have employed flexible water partition film and seal floating ring double containment, it is ensured that motor can normally work.At right cavity, use the setting sealing dogging shoulder, by water cycle factors to housing, it is ensured that stress wave receiving transducer by the biggest pressure, is not arranged by sealing ring, be possible to prevent water to enter right cavity, prevent the water inlet of stress wave receiving transducer from affecting work.Due to hammer and stress wave receiving transducer set in one apparatus, tap fashionable dress to buy property the stress wave vibrations that raw vibrations can make stress wave receiving transducer receive from left cavity to transmit, the accuracy of impact monitoring, therefore, the present invention uses damping layer the form that stress wave receiving transducer wraps up to be isolated or reduces the stress wave vibrations transmitted from left cavity, to increase the accuracy of monitoring.The beating effect of counter-blow hammer of the present invention has been also carried out improving, the stress wave feedback good in order to obtain waveform, when needing hammer to tap, to contact time of stake soon short for speed, and this needs one big momentum of the instantaneous acquisition of hammer, upspring immediately after striking stake, and no longer fall；The present invention uses and drives motor pushing cylinder that the hammer of original state realizes the thrust of a moment, and hammer strikes stake and upsprings to protruding with screens during initial position and fixture block to coordinate and make hammer block not fall, thus realizes preferable beating effect.The stress wave of the present invention occurs to receive device and also has further technological improvement: there is the laminating gelatinous layer of colloidality stress wave receiving transducer lower end, thus allow stress wave receiving transducer realize the most outstanding medium with the stake of bottom be connected, strengthen precision and the intensity of stress wave feedback.
The present invention can effectively overcome the impact of wet hyperbaric environment, it is not necessary to operator carry out underwater performance can complete the low strain vibration test under wet hyperbaric environment, is greatly saved testing cost, and the present invention also has the advantage that test is accurate, easy to use simultaneously.
Accompanying drawing explanation
Fig. 1 is the hammer of present invention structural representation when lifting；
Fig. 2 is the hammer of present invention structural representation when falling half；
Fig. 3 is the hammer of present invention structural representation when falling；
Fig. 4 is the structure diagram of low-strain dynamic measure instrument of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 to Fig. 4 show the structural representation of the present invention.
Reference therein is: data processor 1, controller 11, stress wave occurs to receive device 2, left cavity 2a, right cavity 2b, housing 2c, waterproof interlayer 21, flexible water partition film 22, glue-line 23, balancing leg 24, hammer 3, hammer handle 31, fixture block 31a, tup 32, stress wave receiving transducer 4, every briquetting 41, every pressure hard layer 41a, laminating gelatinous layer 41b, seal dogging shoulder 41c, sealing ring 41d, balancing weight 5, damping layer 6, drive motor 7, cylinder 71, gear block 8, screens projection 81, sealing flange 9, seal floating ring 91.
nullAs shown in Figures 1 to 4，A kind of low-strain foundation pile dynamic tester that can be used for wet hyperbaric environment of the present invention，Including data processor 1，Data processor 1 is connected by watertight line has stress wave to occur to receive device 2，Stress wave occurs to receive device 2 and includes hammer 3 and stress wave receiving transducer 4，Wherein: stress wave occurs to receive device 2 and is provided with an inner chamber body，This inner chamber body is divided into left cavity 2a and right cavity 2b by waterproof interlayer 21，Left cavity 2a lower openings，Hammer 3 is placed in left cavity 2a，Stress wave receiving transducer 4 is placed in right cavity 2b，The bottom laminating of stress wave receiving transducer 4 is equipped every briquetting 41，Include every pressure hard layer 41a and laminating gelatinous layer 41b every briquetting 41，Fixing with stress wave receiving transducer 4 laminating every pressure hard layer 41a，Laminating gelatinous layer 41b side bonds with every pressure hard layer 41a，Opposite side extends to outside the housing 2c that stress wave occurs to receive device 2，Seal to conflict every pressure hard layer 41a and housing 2c and coordinate；Right cavity 2b is provided with balancing weight 5 and the damping layer 6 of the vibration isolation for being transmitted with left cavity 2a by stress wave receiving transducer 4；Left cavity 2a is built-in with and drives motor 7 and the cylinder 71 driven by driving motor 7 and gear block 8, the hammer handle 31 of hammer 3 stretches in cylinder 71 and can move up and down under the promotion of cylinder 71, the tup 32 of hammer 3 is connected with hammer handle 31 and can stretch out housing 2c under the promotion of hammer handle 31, fixture block 31a it is provided with on hammer handle 31, it is provided with retractable screens projection 81 on gear block 8, fixture block 31a can be blocked when screens projection 81 is stretched out and make hammer 3 to fall；Being provided with sealing flange 9 in the middle part of left cavity 2a, sealing flange 9 is provided with sealing floating ring 91 with hammer handle 31 place of cooperation；Data processor 1 includes controller 11, and controller 11 controls the running of driving motor 7 and the flexible of screens projection 81.
In embodiment, being provided with flexible water partition film 22 between left cavity 2a bottom and tup 32, flexible water partition film 22 and housing 2c, tup 32 are collectively forming seal combination and prevent water under high pressure from entering left cavity 2a.
In embodiment, inner chamber body top is filled with glue-line 23, and glue-line 23 parcel stretches into the junction of the watertight line in housing 2c seal casinghousing 2c and watertight line.
In embodiment, in the middle part of briquetting 41, inscribe is formed with sealing dogging shoulder 41c, seals dogging shoulder 41c top and is pressed on housing 2c bottom.
In embodiment, the junction of housing 2c, sealing dogging shoulder 41c and stress wave receiving transducer 4 is provided with sealing ring 41d.
In embodiment, glue-line 23 is epoxy AB glue.
The specifically used method of the present invention is as follows: lay through after a period of time in pile foundation, with steel pipe, stress wave is occurred to receive device 2 and deliver to pile foundation top, then allow stress wave occur to receive device 2 freely fall, balancing leg 24 and laminating gelatinous layer 41b are attached to stake top, screens projection 81 is in the state of stretching out, hammer 3 is in eminence, blocked by screens projection 81, as shown in Figure 1, then control to drive motor 7 to operate with controller 11, control screens protruding 81 to retract simultaneously, cylinder 71 counter-blow hammer 3 applies the downward impulse force of a moment, rebound after making hammer 3 driven pile top, as shown in Figures 2 and 3.The retracted mode of screens projection 81 only can continue a bit of time, when hammer 3 starts to fall, screens protruding 81 can be stretched out under the control of controller 11 again, again blocked by screens projection 81 when hammer 3 returns eminence, hammer 3 is stoped again to fall, hammer 3 returns to the state of Fig. 1, and the stress wave that hammer 3 taps, by the bounce-back at the bottom of stake, is received by stress wave receiving transducer 4, deliver to data processor 1 show, analyze and achieve, the most repeatedly tap three times.After obtaining abundant sound wave curve, sound wave is occurred receives device 2 and mentions recovery.
Below being only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment, and all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be regarded as protection scope of the present invention.
Claims (6)
- null1. the low-strain foundation pile dynamic tester that can be used for wet hyperbaric environment，Including data processor (1)，Described data processor (1) is connected by watertight line has stress wave to occur to receive device (2)，Described stress wave occurs to receive device (2) and includes hammer (3) and stress wave receiving transducer (4)，It is characterized in that: described stress wave occurs to receive device (2) and is provided with an inner chamber body，This inner chamber body is divided into left cavity (2a) and right cavity (2b) by waterproof interlayer (21)，Described left cavity (2a) lower openings，Described hammer (3) is placed in left cavity (2a)，Described stress wave receiving transducer (4) is placed in right cavity (2b)，The bottom laminating of described stress wave receiving transducer (4) is equipped every briquetting (41)，Described includes every pressure hard layer (41a) and laminating gelatinous layer (41b) every briquetting (41)，Described is fixing with stress wave receiving transducer (4) laminating every pressure hard layer (41a)，Described laminating gelatinous layer (41b) side bonds with every pressure hard layer (41a)，Opposite side extends to stress wave and occurs to receive the housing (2c) of device (2) outward，Described coordinates with housing (2c) sealing conflict every pressure hard layer (41a)；Described right cavity (2b) is provided with balancing weight (5) and the damping layer (6) of the vibration isolation for stress wave receiving transducer (4) and left cavity (2a) being transmitted；Described left cavity (2a) is built-in with and drives motor (7) and the cylinder (71) driven by driving motor (7) and gear block (8), the hammer handle (31) of described hammer (3) stretches in cylinder (71) and can move up and down under the promotion of cylinder (71), the tup (32) of described hammer (3) is connected with hammer handle (31) and can stretch out housing (2c) under the promotion of hammer handle (31), it is provided with fixture block (31a) on described hammer handle (31), retractable screens it is provided with protruding (81) on described gear block (8), described screens protruding (81) can block fixture block (31a) when stretching out makes hammer (3) to fall；Described left cavity (2a) middle part is provided with sealing flange (9), and described sealing flange (9) is provided with sealing floating ring (91) with hammer handle (31) place of cooperation；Described data processor (1) includes controller (11), and described controller (11) controls the running of driving motor (7) and the flexible of screens protruding (81).
- A kind of low-strain foundation pile dynamic tester that can be used for wet hyperbaric environment the most according to claim 1, it is characterized in that: be provided with flexible water partition film (22) between described left cavity (2a) bottom and tup (32), described flexible water partition film (22) and housing (2c), tup (32) are collectively forming seal combination and prevent water under high pressure from entering left cavity (2a).
- A kind of low-strain foundation pile dynamic tester that can be used for wet hyperbaric environment the most according to claim 2, it is characterized in that: described inner chamber body top is filled with glue-line (23), described glue-line (23) parcel stretches into the junction of the watertight line in housing (2c) seal casinghousing (2c) and watertight line.
- A kind of low-strain foundation pile dynamic tester that can be used for wet hyperbaric environment the most according to claim 3, it is characterized in that: described is formed with sealing dogging shoulder (41c) every briquetting (41) middle part inscribe, and described sealing dogging shoulder (41c) top is pressed on housing (2c) bottom.
- A kind of low-strain foundation pile dynamic tester that can be used for wet hyperbaric environment the most according to claim 4, is characterized in that: the junction of described housing (2c), sealing dogging shoulder (41c) and stress wave receiving transducer (4) is provided with sealing ring (41d).
- A kind of low-strain foundation pile dynamic tester that can be used for wet hyperbaric environment the most according to claim 5, is characterized in that: described glue-line (23) is epoxy AB glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410647125.3A CN104314114B (en) | 2014-11-16 | 2014-11-16 | Pile foundation low-strain dynamic tester capable of being used in underwater high-pressure environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410647125.3A CN104314114B (en) | 2014-11-16 | 2014-11-16 | Pile foundation low-strain dynamic tester capable of being used in underwater high-pressure environment |
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| Publication Number | Publication Date |
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| CN104314114A CN104314114A (en) | 2015-01-28 |
| CN104314114B true CN104314114B (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410647125.3A Active CN104314114B (en) | 2014-11-16 | 2014-11-16 | Pile foundation low-strain dynamic tester capable of being used in underwater high-pressure environment |
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| CN108301820B (en) * | 2018-05-02 | 2023-04-21 | 重庆科技学院 | Acoustic wave detection device in stratum borehole and detection method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05306923A (en) * | 1992-04-30 | 1993-11-19 | Takenaka Komuten Co Ltd | Three-dimensional method and instrument for measuring surface |
| CN1090044A (en) * | 1993-01-07 | 1994-07-27 | 修朝英 | Portable integrated dynamic test-pile analyzing instrument |
| JPH09196897A (en) * | 1996-01-22 | 1997-07-31 | Mitsubishi Heavy Ind Ltd | Diagnosis method for soundness of underground construction |
| CN201068574Y (en) * | 2007-03-16 | 2008-06-04 | 天津市大地海陆岩土工程技术开发有限公司 | Heave hand hammer large long pile strain 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 |
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Effective date of registration: 20180529 Address after: 350000 Hongxin building 408, new road 408, Lang Qi Town, Fuzhou, Fujian province. Patentee after: Fujian land and sea engineering survey design Co., Ltd. Address before: 315040 room 4, No. 3, Grand Hyatt garden, 881, 100 Zhangdong Road, Jiangdong District, Ningbo, Zhejiang, China. Patentee before: Zhang Sicheng |
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Inventor after: Zeng Qingyou Inventor before: Zhang Sicheng |
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Address after: 350008 Building 5, fuwanpian standard workshop, Jinshan industrial concentration area, No. 869, Panyu Road, Gaishan Town, Cangshan District, Fuzhou City, Fujian Province Patentee after: Fujian Luhai Engineering Technology Co.,Ltd. Address before: 350000 Hongxin building 408, new road 408, Lang Qi Town, Fuzhou, Fujian province. Patentee before: FUJIAN LUHAI ENGINEERING INVESTIGATION & DESIGN CO.,LTD. |
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