CN103981908B - The monitoring and evaluation device and method of a kind of concrete pipe base and soil body coupling performance - Google Patents
The monitoring and evaluation device and method of a kind of concrete pipe base and soil body coupling performance Download PDFInfo
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- CN103981908B CN103981908B CN201410239401.2A CN201410239401A CN103981908B CN 103981908 B CN103981908 B CN 103981908B CN 201410239401 A CN201410239401 A CN 201410239401A CN 103981908 B CN103981908 B CN 103981908B
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Abstract
The invention discloses the monitoring and evaluation device and method of a kind of concrete pipe base and soil body coupling performance, comprise piezoelectric ceramics intelligent aggregate, piezoelectric ceramics intelligent aggregate array, data acquisition system (DAS), vertical load system and horizontal vibration load system; Method comprises step 1: specific location several piezoelectric ceramics intelligent aggregates embedding being connected with data acquisition system (DAS) by wire on the filling pile cage of reinforcement of pile foundation in advance before pile foundation is built, form piezoelectric ceramics intelligent aggregate array; Step 2: use concreting filling pile cage of reinforcement, forms concrete pipe base; Step 3: the change being observed signal in concrete coagulation process by data acquisition system, is judged the real time health state of pile foundation, and whether occur broken pile by analytic signal characteristic; Step 4: carry out long-term Real-Time Monitoring to pile foundation, judges concrete pipe base and soil body couple state.Present invention achieves the safety assessment of concrete-pile and long-term Real-Time Monitoring.
Description
Technical field
The invention belongs to civil engineering monitoring and evaluation technical field, relate to a kind of Real-time security monitoring device and method for concrete pile integrity and bearing capacity evaluation, particularly relate to the long-term Real-Time Monitoring of a kind of concrete pipe base and soil body coupling performance and apparatus for evaluating and method.
Background technology
At present, piezoelectric ceramics making intelligent aggregate is utilized to have some basic researches and document to describe for the detection of concrete-pile.
For the detection of pile integrity, utilize the fluctuation effect that piezoelectric ceramics array is formed, observe the running status of ripple in pile body and judge that the homogeneity of the long scope inner concrete of stake changes state.Existing background technology is in concrete pile body or piezoelectric ceramics intelligent aggregate array is arranged on surface, specific pumping signal is inputted to the intelligent aggregate doing actuator, signal is received by the intelligent aggregate making sensor after the transmission of pile body, judges pile foundation faulted condition by the character of contrast and analysis signal with change.Current technology only has interior the damage concrete pipe base of specific environment under given conditions to carry out fuzzy Judgment, limitation is very large and can not accurately judge damage position and degree of injury, and moisture invades the impact also actually rare description in existing document on signal in addition.
For the bearing capacity evaluation of stake, the load-bearing capacity of stake largely depends on concrete pipe base and soil body coupling performance.Also rare in the research of association area based on the research of intelligent aggregate to concrete pipe base and soil body coupling performance.
Summary of the invention
The object of this invention is to provide a kind of based on the monitoring and evaluation device and method of intelligent aggregate to concrete pipe base and soil body coupling performance, form piezoelectricity array observation ripple by intelligent aggregate and come the faulted condition of detection of pier foundation and the coupling performance of concrete pipe base and the soil body in stake and the behavior pattern between concrete pipe base and the soil body, pile foundation damage position and degree of injury are defined, concrete pipe base and soil body couple state are defined, thus determine its bearing capacity, judge its security performance.
The technical scheme that device of the present invention adopts is: the monitoring and evaluation device of a kind of concrete pipe base and soil body coupling performance, the piezoelectric ceramics intelligent aggregate array comprise piezoelectric ceramics intelligent aggregate, being made up of several piezoelectric ceramics intelligent aggregates, is characterized in that: also comprise data acquisition system (DAS), vertical load system and horizontal vibration load system; Described piezoelectric ceramics intelligent aggregate is positioned on poured pile base steel reinforcement cage, for imbedding when concrete perfusion in pile foundation as the signal emitting-source of flaw detection monitoring or receiver; Several described piezoelectric ceramics intelligent aggregates are embedded in specific location in pile foundation respectively and are connected with described data acquisition system (DAS) by wire, for realizing Real-time Collection and the transmission of signal; Described vertical load system and horizontal vibration load system are carried in described pile foundation respectively, for loading vertical and horizontal load to described pile foundation.
As preferably, piezoelectric patches, concrete cylindrical and wire that described piezoelectric ceramics intelligent aggregate is crossed by water-proofing treatment form, described piezoelectric patches is arranged in described concrete cylindrical, and described piezoelectric patches is connected with described data acquisition system (DAS) by described wire.
As preferably, described horizontal vibration load system is controlled by PC control system and measures.
The technical scheme that method of the present invention adopts is: the method for the monitoring and evaluation of a kind of concrete pipe base and soil body coupling performance, is characterized in that, comprises the following steps:
Step 1: specific location several piezoelectric ceramics intelligent aggregates embedding being connected with described data acquisition system (DAS) by wire on the filling pile cage of reinforcement of described pile foundation in advance before pile foundation is built, form piezoelectric ceramics intelligent aggregate array;
Step 2: with the filling pile cage of reinforcement described in concreting, form concrete pipe base;
Step 3: the change being observed signal in concrete coagulation process by described data acquisition system, is judged the real time health state of described pile foundation, and whether occur broken pile by analytic signal characteristic;
Step 4: long-term Real-Time Monitoring is carried out to described pile foundation, a piezoelectric ceramics intelligent aggregate is transmitted in described pile foundation as signal emitting-source firing stress ripple, other piezoelectric ceramics intelligent aggregate detects stress wave in different local response as signal receiver, measured waveform changes, the long-term health state of the pile foundation described in judgement and concrete pipe base and soil body couple state, especially pay close attention to the change of data during climate change.
The present invention, relative to prior art, has following beneficial effect:
1. in a long scope, in concrete casting-vibrate-condensation-consolidation process, ripple signal, in the change of travel path, determines the judgement of damage position and the definition of degree of injury, set up the criterion of pile integrity, assessment moisture invades the impact on ripple signal;
2. the operation characteristic of ripple in concrete pipe base inside and when atmospheric environment changes, operation Variation Features in the soil body and on Pile Soil interface, so that concrete pipe base and soil body coupling mechanism under atmospheric environment to be described, and along with the definition of multiple coupling relation and the change of coupled characteristic in the soil body growth course soil body;
3. changed by coupled characteristic, realize the judgement of soil body shear resistance and the judgement of concrete-pile load-bearing capacity, thus realize the safety assessment technique of concrete-pile;
4. realize the long-term Real-Time Monitoring of concrete pipe base.
Accompanying drawing explanation
Fig. 1: the structure drawing of device of the embodiment of the present invention.
Fig. 2: the piezoelectric ceramics intelligent aggregate structural drawing of the embodiment of the present invention.
Fig. 3: the flaw detection mode schematic diagram of the embodiment of the present invention.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with drawings and Examples, the present invention is described in further detail, should be appreciated that exemplifying embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Ask for an interview Fig. 1, Fig. 2, the technical scheme that device of the present invention adopts is: the monitoring and evaluation device of a kind of concrete pipe base and soil body coupling performance, the piezoelectric ceramics intelligent aggregate array 2 comprise piezoelectric ceramics intelligent aggregate 1, being made up of several piezoelectric ceramics intelligent aggregates 1, is characterized in that: also comprise data acquisition system (DAS) 3, vertical load system 4 and horizontal vibration load system 5; Piezoelectric patches 101, concrete cylindrical 102 and wire 103 that piezoelectric ceramics intelligent aggregate 1 is crossed by water-proofing treatment form, and piezoelectric patches 101 is arranged in concrete cylindrical 102, and piezoelectric patches 101 is connected with data acquisition system (DAS) 3 by wire 103; Horizontal vibration load system 5 is controlled by PC control system 501 and measures; Piezoelectric ceramics intelligent aggregate 1 is positioned on poured pile base steel reinforcement cage, for imbedding when concrete perfusion in pile foundation 6 as the signal emitting-source of flaw detection monitoring or receiver; Several piezoelectric ceramics intelligent aggregates 1 are embedded in specific location in pile foundation 6 respectively and are connected with data acquisition system (DAS) 3 by wire, for realizing Real-time Collection and the transmission of signal; Vertical load system 4 and horizontal vibration load system 5 are carried in pile foundation 6 respectively, for loading vertical and horizontal load to pile foundation 6.
The soil body is the inelastic body in a change.So border is difficult to define under study for action.But a fundamental assumption is set up, and namely can think that the border of pile foundation is relatively stable, be confirmable: the decision boundary setting up a couple state thus, carries out the definition of couple state: the ripple signal definition namely defining contact-extruding-separation.It is the nonlinear problem of a height that the growth of the soil body and concrete pipe base are coupled with the soil body: boundary nonlinear, material nonlinearity, external force is also stochastic variable.Definition and the judgement of such couple state are very difficult, and particularly the soil body self is in a development change process, and the couple state so only with sufficient intensity and stability is the primitive decision principle that pile foundation has enough bearing capacities.Under this prerequisite, in soil body change procedure, need to pay close attention to ripple all sudden changes in the soil body until on the travel path of pile body inside.The soil body is the multiple coupling system of a height in an atmosphere: the hole-soil body-water-temperature-chemistry-Li, ripple is travel path height change in this individual system, and only carry out Real-Time Monitoring and could to be coupled with the soil body to metastable concrete pipe base and to evaluate, thus determine its load-bearing capacity, judge its security performance.
Measured waveform change is the means being uniquely used for evaluating the soil body and concrete pipe base and soil body couple state.Due to frequency dispersion, the low frequency characteristic of R wave, be desirable measurement ripple to the multiple coupling soil body growth course of nonlinearity.Soil strength can judge its stability by observing the path rule of ripple in the soil body, thus in the relatively stable waveform relationship of coupling of hole-water-soil, reflects soil solidifying degree by ripple, judges the shear property of the soil body with this.Here, it is anticipated that the change of waveform reflects the coupling scenario of soil body mesoporosity-water-soil.The Changing Pattern of research frequency dispersion in this coupled relation.Frequency dispersion increases suddenly, then hole increases, and concrete pipe base is coupled with the soil body and improves, and soil body shear behavior declines, and concrete pipe base is downtrending with being coupled of the soil body.At this moment, observe the change of concrete pipe base and soil body surface of contact, when frequency dispersion increases to a certain degree, namely concrete pipe base be coupled with the soil body downtrending to a certain extent time, theoretically, soil body mesoporosity increases, concrete pipe base and soil body interface are in released state, and pile foundation week, native shear behavior decline increased, and was even tending towards 0, thus concrete pipe base is coupled with the soil body, function is tending towards 0, at this moment thinks that pile foundation loses load-bearing capacity.So in theory, key probes into the Changing Pattern of ripple on travel path.
The technical scheme that method of the present invention adopts is: the method for the monitoring and evaluation of a kind of concrete pipe base and soil body coupling performance, is characterized in that, comprises the following steps:
Step 1: specific location several piezoelectric ceramics intelligent aggregates 1 embedding being connected with data acquisition system (DAS) 3 by wire on the filling pile cage of reinforcement of pile foundation 6 in advance before pile foundation 6 is built, form piezoelectric ceramics intelligent aggregate array 2;
Step 2: use concreting filling pile cage of reinforcement, forms concrete pipe base 6;
Step 3: the change being observed signal in concrete coagulation process by data acquisition system (DAS) 3 collection, is judged the real time health state of pile foundation 6, and whether occur broken pile by analytic signal characteristic;
Step 4: long-term Real-Time Monitoring is carried out to pile foundation 6, a piezoelectric ceramics intelligent aggregate 1 is transmitted in pile foundation 6 as signal emitting-source firing stress ripple, other piezoelectric ceramics intelligent aggregate 1 detects stress wave in different local response as signal receiver, measured waveform changes, judge the long-term health state of pile foundation 6 and concrete pipe base and soil body couple state, especially pay close attention to the change of data during climate change.
Ask for an interview Fig. 3, the pile foundation flaw detection monitoring of the present embodiment adopts active sensing flaw detection mode: both a piezoelectric ceramics intelligent aggregate 1 transmitted in pile body as signal emitting-source firing stress ripple, and other piezoelectric ceramics intelligent aggregate 1 detects stress wave in different local response as signal receiver.In pile foundation, damage in various degree correspondingly can affect the transferring energy of stress wave.The energy-delivering decay of stress wave becomes corresponding relation with degree of injury.In the present invention, in concrete pipe base, different piezoelectric ceramics intelligent aggregates 1 is monitored being chosen as signal emitting-source-signal receiver the region different to pile foundation.In data topology network, the health status data of a pile foundation are stored in a modal processor and node data processing unit is uploaded to upper level data processing unit thus, a node data unit comprises data and stores and radio transmitter, the health status of different pile body is uploaded to central processing unit by upper level data cell, home control network communication protocol will be applied to Communications service, can carry out communication between data processing unit.
Although this instructions more employs the terms such as piezoelectric ceramics intelligent aggregate 1, piezoelectric ceramics intelligent aggregate array 2, data acquisition system (DAS) 3, vertical load system 4, horizontal vibration load system 5, piezoelectric patches 101, concrete cylindrical 102, wire 103 and PC control system 501, do not get rid of the possibility using other terms.Use these terms to be only used to describe essence of the present invention more easily, the restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Should be understood that, the part that this instructions does not elaborate all belongs to prior art.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; therefore the restriction to scope of patent protection of the present invention can not be thought; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that the claims in the present invention protect; can also make and replacing or distortion, all fall within protection scope of the present invention, request protection domain of the present invention should be as the criterion with claims.
Claims (3)
1. a method for the monitoring and evaluation of concrete pipe base and soil body coupling performance, utilizes the monitoring and evaluation device of concrete pipe base and soil body coupling performance to carry out the monitoring and evaluation of concrete pipe base and soil body coupling performance; The piezoelectric ceramics intelligent aggregate array (2) that described device comprises piezoelectric ceramics intelligent aggregate (1), is made up of several piezoelectric ceramics intelligent aggregates (1), is characterized in that: also comprise data acquisition system (DAS) (3), vertical load system (4) and horizontal vibration load system (5); Described piezoelectric ceramics intelligent aggregate (1) is positioned on poured pile base steel reinforcement cage, for imbedding when concrete perfusion in pile foundation (6) as the signal emitting-source of flaw detection monitoring or receiver; Several described piezoelectric ceramics intelligent aggregates (1) are embedded in specific location in pile foundation (6) respectively and are connected with described data acquisition system (DAS) (3) by wire, for realizing Real-time Collection and the transmission of signal; Described vertical load system (4) and horizontal vibration load system (5) are carried in described pile foundation (6) respectively, for loading vertical and horizontal load to described pile foundation (6);
It is characterized in that, comprise the following steps:
Step 1: specific location several piezoelectric ceramics intelligent aggregates (1) embedding being connected with described data acquisition system (DAS) (3) by wire on the filling pile cage of reinforcement of described pile foundation (6) in advance before pile foundation (6) is built, form piezoelectric ceramics intelligent aggregate array (2);
Step 2: with the filling pile cage of reinforcement described in concreting, form concrete pipe base (6);
Step 3: the change being observed signal in concrete coagulation process by the collection of described data acquisition system (DAS) (3), is judged the real time health state of described pile foundation (6), and whether occur broken pile by analytic signal characteristic;
Step 4: long-term Real-Time Monitoring is carried out to described pile foundation (6), a piezoelectric ceramics intelligent aggregate (1) is transmitted in described pile foundation (6) as signal emitting-source firing stress ripple, other piezoelectric ceramics intelligent aggregate (1) detects stress wave in different local response as signal receiver, measured waveform changes, the long-term health state of the pile foundation (6) described in judgement and concrete pipe base and soil body couple state, especially pay close attention to the change of data during climate change.
2. method according to claim 1, it is characterized in that: piezoelectric patches (101), concrete cylindrical (102) and wire (103) that described piezoelectric ceramics intelligent aggregate (1) is crossed by water-proofing treatment form, described piezoelectric patches (101) is arranged in described concrete cylindrical (102), and described piezoelectric patches (101) is connected with described data acquisition system (DAS) (3) by described wire (103).
3. method according to claim 1, is characterized in that: described horizontal vibration load system (5) is controlled by PC control system (501) and measured.
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| CN201410239401.2A CN103981908B (en) | 2014-06-03 | 2014-06-03 | The monitoring and evaluation device and method of a kind of concrete pipe base and soil body coupling performance |
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| CN105040747B (en) * | 2015-04-21 | 2017-06-13 | 浙江大学 | A kind of real-time monitoring device and method for pile works local scour experiment |
| CN105464149B (en) * | 2015-11-18 | 2017-12-15 | 湖北工业大学 | A kind of bored concrete pile clay content detection method |
| CN105891331A (en) * | 2016-04-01 | 2016-08-24 | 武汉科技大学 | Concrete structure defect online positioning method based on tubular piezoelectric intelligent aggregate |
| CN106501365A (en) * | 2016-12-21 | 2017-03-15 | 福州大学 | A kind of piezoelectric intelligent aggregate sensor array and using method for structure monitoring |
| CN109557184A (en) * | 2019-01-15 | 2019-04-02 | 福州大学 | For bridge pier sensor laying and method that stabilization by drainage construction quality monitors |
| CN111579355B (en) * | 2020-06-18 | 2023-04-28 | 湖北震泰建设工程质量检测有限责任公司 | Method for monitoring unbalanced load of static load test of bored concrete pile |
| CN111733899B (en) * | 2020-06-18 | 2022-02-18 | 湖北震泰建设工程质量检测有限责任公司 | Real-time safety monitoring method for pile top in static load test process of concrete cast-in-place pile |
| CN114622605B (en) * | 2022-03-11 | 2024-08-27 | 国网甘肃省电力公司经济技术研究院 | Concrete filling pile resistance tomography monitoring device and monitoring method |
| CN116837914A (en) * | 2023-07-06 | 2023-10-03 | 齐鲁高速公路股份有限公司 | Stress detection microsphere, system and method for cement mixing pile |
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| JPH1079535A (en) * | 1996-09-04 | 1998-03-24 | Toto Ltd | Laminated piezoelectric transformer |
| CN102507655A (en) * | 2011-10-24 | 2012-06-20 | 沈阳建筑大学 | Method for monitoring compaction of concrete-filled steel tube structure based on piezoelectric intelligent aggregate |
| CN103048384B (en) * | 2012-12-20 | 2017-12-26 | 刘铁军 | A kind of concrete humidity monitoring method based on piezoelectric intelligent aggregate |
| CN103792263A (en) * | 2014-01-23 | 2014-05-14 | 沈阳建筑大学 | Wireless intelligent aggregate health monitoring device and method for concrete structure |
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