CN1065422A - The real-time monitoring method for quality of cement mixing method - Google Patents
The real-time monitoring method for quality of cement mixing method Download PDFInfo
- Publication number
- CN1065422A CN1065422A CN 91102056 CN91102056A CN1065422A CN 1065422 A CN1065422 A CN 1065422A CN 91102056 CN91102056 CN 91102056 CN 91102056 A CN91102056 A CN 91102056A CN 1065422 A CN1065422 A CN 1065422A
- Authority
- CN
- China
- Prior art keywords
- pile
- cement
- spray
- quality
- real
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Piles And Underground Anchors (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to a kind of cement as hardening agent, send in the ground by the spray feed system, utilize the rotation of stirring machine agitator simultaneously, make soil with hardening agent fully mix the real-time monitoring method for quality that condenses into cement mixing method thoroughly.Cement mixed ratio in the mixing pile formation of pile and spray uniformity coefficient signal are received by density sensor that is installed on conveyance conduit and flow sensor, and through (mould-number) A/D of signal conversion and MICROCOMPUTER PROCESSING, demonstrate the stack semi-invariant of hardening agent spray amount on the reflection pile body and the numerical table or the curve of pile body depth relationship, compare with the pile body design load, as required weak pile cutoff is mixed additional spray again.
Description
The present invention relates to a kind of cement as hardening agent, send in the ground by the spray feed system, utilize the rotation of stirring machine agitator simultaneously, make soil and hardening agent fully mix the soil cement induration that is condensed into thoroughly, especially the real-time monitoring method for quality of cement mixing method, by cement mixed ratio in the cement mixing method formation of pile and spray uniformity coefficient are carried out the continuous dynamic monitoring, to guarantee the pile quality of cement mixing method.
Cement mixing method is to make hardening agent with cement, on the spot soil and grout or cement powder is forced to mix and stir the formation cement earth pile with stirring machine in the ground deep.It can form column, grid-like and block pile body according to requirement of engineering, add solid also can be soft can be hard.Therefore both can be used as the composite foundation under buildings, the Equipment Foundations, can be used as the pile foundation under the isolated footing again.Yet the accurate evaluation problem of cement-earth stirring pile quality but is not well solved all the time, and the quality assessment of cement mixing method is cement mixing method moulding or fixed the detection more later in the prior art.The quality determining method of cement mixing method commonly used at present summed up in Guo Zhiye " Zhejiang building " first phase nineteen ninety " cement-earth stirring pile quality detects and an analyzes " literary composition.1, feeler inspection: adopt the portable penetrometer instrument, hit the soil cement intensity that number is judged each pile cutoff according to feeler inspection.2, boring with sampling: pass through or sleeve pipe is pressed in the stake of firm moulding with mark, take out cement-like soil, observe the degree that stirs, and make test block, make a strength test by the length of time.Pile is surpassed 7 days pile body, and available rig is got stamen and is checked on the quality, and can know the degree that stirs of seeing soil cement from stamen.3, the moving survey: according to the quality of data inspection stakes such as time domain waveform, velocity of longitudinal wave, spectrum analysis and general power.4, pricker is visited: insert the pile body of mixing pile with the tack drill rod of a certain specification, judge the soil cement intensity of each pile cutoff with the degree of depth of insertion pile body.Huang is new in addition, pacify in the alleyway, Zhou Guojun " Jiangsu building " 872, and " soft soil foundation deep mixing reinforcement method " literary composition also discloses a kind of thin-wall sampler, carries out the check of pile quality behind pile in seven days.The above-mentioned quality determining method to cement mixing method exists common weak point to be: only just can detect in the cement mixing method moulding or after solidifying, not only because there is its limitation at the position of detecting, the total quality that may not necessarily reflect mixing pile truly, and, even there are quality problems in tested pile body, repair also has suitable inconvenience; If near suitable position piling again this defective in quality mixing pile, like this standby time of equipment longer, utilization factor is not high.The equipment of promptly withdrawing if piling finishes finds that pile body exists quality problems to settle a machine piling then more inconvenient again.In a word, this existing deficiency of method of afterwards carrying out the pile quality check is conspicuous.
The objective of the invention is to overcome existing above-mentioned deficiency in the prior art, and provide a kind of easy to use, in the process of soil cement stirring pile, just can reflect pile quality, be convenient in time remedy the deficiency on the pile quality, guarantee the method for real-time of mixing pile pile quality.
The objective of the invention is to be realized by following technological means.Cement-earth stirring pile quality method of real-time of the present invention, density sensor and flow sensor are installed on the spray feed pipeline of cement hardener, cement hardener in the mixing pile pile dynamic process mix than with spray uniformity coefficient signal, receive by density sensor and flow sensor, and by (mould-number) A/D conversion and MICROCOMPUTER PROCESSING, the numerical table that demonstrates the stack semi-invariant of cement hardener spray amount and pile body depth relationship on the reflection pile body is or/and curve, by carrying out quantitative comparison with the pile body design load, as required existing weak pile cutoff on the pile body is repeated to stir and/or additional spray in real time, to guarantee the pile quality of cement mixing method.
The advantage that the present invention is compared with prior art had is fairly obvious.1, cement mixing method system quality of pile is except the fixed factor of routine, and key is cement mixed ratio and spray uniformity coefficient.Because the present invention carries out dynamically monitoring in real time as finds that the pile cutoff of a certain degree of depth on the pile body exists the cement mixed ratio deficiency or stirs inhomogeneous cement mixed ratio in the mixing pile formation of pile and spray uniformity coefficient, do not meet the pile body designing requirement, can be in real time by this pile cutoff being repeated stirring and/or additional spray, in time remedy the real pile quality that has guaranteed every mixing pile effectively.2, owing to the quality monitoring to pile body is real-time monitoring, avoid the bigger defective of local detection stochastic error, and in case find to exist on the pile body quality problems, the stake machine only needs in former stake position agitator to be dropped to this weakness pile cutoff and stirs again or additional spray, very convenient, not only quality can guarantee, and the construction period of engineering can have certain amplitude to shorten.
Description of drawings is as follows:
Fig. 1 is a cement-earth stirring pile quality real-time monitoring system block diagram.
Fig. 2 is the stack semi-invariant of reflection cement spray amount and the Cartesian plot of pile body depth relationship.
The relation curve of Fig. 3 radiation intensity and density.
The present invention will be described in further detail by following embodiment and accompanying drawing.
Embodiment one:
In the present embodiment, cement mixing method is made hardening agent with cement, with the boring of (SJB-1 type) deep mixer, on the spot soil and grout are forced to mix and stir in the ground deep, form cement mixing method with certain intensity and load-bearing capacity by series of physical-chemical reaction.The quality of pile body is except cement mark, spouting velocity, stirs again etc. outside the technological requirement, and key is cement mixed ratio (being the ratio of cement mixed weight with the undisturbed soil capacity) and spray uniformity coefficient.In the monitoring system that designs according to real-time monitoring method for quality of the present invention (referring to Fig. 1), radiant type density sensor 4 and electromagnetic flow sensor 3 are installed on grout spray feed pipeline 1, in the cement mixing method formation of pile, no matter be that dry powder shape or slimy cement hardener are all carried along the axis of spray feed pipeline 1, its cement mix than with spray uniformity coefficient signal, receive by density sensor 4 and flow sensor 3, by density converter 6, flow converter 5, and density signal (mould-number) A
1/ D
1Converter 8, flow signal (mould-number) A
2/ D
2Converter 7, input microcomputer 9 is handled, and sends into the inner diameter values of the bore value series cement slurry spray feed pipeline of microcomputer, and the stirring rate of agitator and the reciprocal number of times that stirs are changing value, are once keyed in by microcomputer keyboard according to the working-yard operational circumstances.Is the mixing pile degree of depth for the ease of system controlled by computer and analysis according to H in the kinematic relation H=vt formula of stirring-head, V is the upper and lower reciprocating average velocity of stirring-head, t is the required time of the single stroke of stirring-head, and pile body length segmentation and time slice are converted.As a certain mixing pile length is 10 meters, the technological process of mixing pile is two reciprocal agitation stroke (amounting to 40 meters), the average translational speed of stirring-head is 1 meter/minute, then finish this mixing pile in theory required time be 40 minutes, wherein the 1st minute, the 20th minute and all stack accumulations in the 0-1 of pile body rice pile cutoff of the 40th minute grout spray amount.When stirring-head is finished two reciprocal agitation stroke by technological requirement after, go out the coordinate curve of actual spray amount and the pile body degree of depth on the pile body by computer printing, referring to Fig. 2.The stack semi-invariant and the pile body design theory spray amount of every meter section cement spray amount are compared, just can draw the conclusion whether quality of this each pile cutoff of mixing pile adheres to specification.Among Fig. 2,1,4 meet requirement, and the spray of pile cutoff hardening agent shown in 2 is excessive, 3 select shown in the semi-invariant deficiency (stake dark 3-4 rice) of pile cutoff hardening agent spray.Need repeat stirring or/and replenish spray for the corresponding pile cutoff that is lower than design spray amount Qm ' error range-δ, to guarantee the quality of pile body.In fact the real-time analysis of the cement mixed ratio in the mixing pile formation of pile and spray uniformity coefficient being carried out with microcomputer is dynamically continuous, if be necessary the pile body segmentation to be divided to half meter one length at interval, even thinner.It is relevant with precision that pile body length is cut apart hop count, and cutting apart more, the detailed rules and regulations precision heals high.
In the present embodiment, it is the nuclear radiation densimeter of NNF-210 that density sensor 4 is selected model for use, and its output signal is: 0～10mA direct current standard signal.The principle of work of density sensor is to utilize under the certain condition of measured object thickness, and different densities absorbs different principles to radiation, and measuring cement is density of medium or concentration in the hardening agent spray pipeline 1, carries out continuous non-contact measurement.Internal diameter of the pipeline is D, and density is the measured medium of p, after being passed by ray, and transmitted intensity I exponent function relation when transmitted intensity I on the sensor and p=0:
In the formula: μ
mMass absorption coefficient
I-incident transmitted intensity (p=0)
I-emergent ray intensity (p=0)
The p-Media density
D-passes the thickness (D=d) of medium
The relation curve of Media density p and transmitted intensity is referring to accompanying drawing 3.
It is the electromagnetic flowmeter of LDZ-5 type that flow sensor 3 is selected model for use, output signal is the standard signal of 0～10mA, bore and cement are that the internal diameter of hardening agent spray pipeline 1 is suitable or more smaller mutually, and with ring flange 2 with these flow sensor 3 coaxial being installed on the spray pipeline 1, and measured medium this flow sensor 3 of flowing through.If hardening agent is the cement of dry powder shape, because the variation of measured medium, so flow sensor also need do corresponding adjustment, generally selects differential pressure flowmeter such as Venturi meter or orifice flowmeter for use.Density sensor can also be selected the condenser type densitometer for use except aforesaid radiation type density meter.
Embodiment two:
Form pile body at mixing pile by technological requirement except embodiment one is described, after agitator is lifted from ground, numerical table that is gone out by computer printing or curve and pile body design load compare, the pile quality of evaluation mixing pile is also done outside the corresponding compensation, can also in last lifting return of puddler head, carry out the Real-Time Evaluation of mixing pile pile quality, automatically weak pile cutoff be carried out corresponding compensation.Block diagram referring to accompanying drawing 1, in last return of stake machine puddler head, the cement mixed ratio and the spray uniformity coefficient signal of each pile cutoff on the mixing pile pile body that receives by density sensor 4 and flow sensor 3, handle through (mould-number) A/D conversion input microcomputer, (several-Mo) D through control signal then
3/ A
3Converter 11, analog signal amplifier 12, control executing mechanism 13.The directly action of control stirring-head 14.If the pile cutoff of a certain degree of depth of pile body does not reach designing requirement, stirring-head 14 can stir in the process that upwards promotes herein in real time again or/and replenish spray, continue upwards to promote after reaching design load, stirring-head 14 is according to the control of microcomputer signalizing activity again.After stirring-head was lifted from ground, this mixing pile had also just been finished by designing requirement.
Although the real-time monitoring method for quality of cement mixing method of the present invention has been done comparatively detailed explanation by embodiment, yet the cement that belongs to the present invention's design is that hardening agent is except single cement powder and grout, can also mix additives such as calcium lignosulfonate, gypsum and triethanolamine in cement, the mixing pile quality monitoring method and the previous embodiment of this type of hardening agent are identical.
Claims (3)
1, a kind of cement as hardening agent, send in the ground by the spray feed system, utilize the rotation of stirring machine agitator simultaneously, make soil and hardening agent fully mix the soil cement induration that is condensed into thoroughly, especially the real-time monitoring method for quality of cement mixing method, it is characterized in that density sensor and flow sensor are installed on the spray feed pipeline of cement hardener, cement hardener in the mixing pile pile dynamic process mixes than being received by density sensor and flow sensor with spray uniformity coefficient signal, and by (mould-number) A/D conversion and MICROCOMPUTER PROCESSING, the numerical table that demonstrates the stack semi-invariant of cement hardener spray amount and pile body depth relationship on the reflection pile body is or/and curve, by carrying out quantitative comparison, as required the weak pile cutoff on the pile body is repeated to stir and/or additional spray in real time with the pile body design load.
2, the real-time monitoring method for quality of cement mixing method as claimed in claim 1 is characterized in that mixing than density sensor and flow sensor with spray uniformity coefficient signal in order to the reception cement hardener is respectively radiant type density sensor and electromagnetic flow sensor.
3, the real-time monitoring method for quality of cement mixing method as claimed in claim 1, it is characterized in that: weak pile cutoff is repeated to stir and/or additional spray in real time, can be according to curing agent ratio and spray uniformity coefficient signal, directly control the action of puddler head by microcomputer, last promotes the reparation of finishing automatically in the return weak pile cutoff at the puddler head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91102056 CN1065422A (en) | 1991-03-30 | 1991-03-30 | The real-time monitoring method for quality of cement mixing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91102056 CN1065422A (en) | 1991-03-30 | 1991-03-30 | The real-time monitoring method for quality of cement mixing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1065422A true CN1065422A (en) | 1992-10-21 |
Family
ID=4905389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91102056 Pending CN1065422A (en) | 1991-03-30 | 1991-03-30 | The real-time monitoring method for quality of cement mixing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1065422A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831909A (en) * | 2010-05-11 | 2010-09-15 | 河海大学 | Cement mixing pile construction slurry flow real-time control device |
| CN102493431A (en) * | 2011-12-05 | 2012-06-13 | 中冶天工集团有限公司 | Real time monitoring strengthening method preventing pile foundation from descending |
| CN103913560A (en) * | 2013-01-05 | 2014-07-09 | 中交武汉港湾工程设计研究院有限公司 | Real-time monitoring system of condensing state of concrete and real-time monitoring method |
| CN103981861A (en) * | 2013-05-17 | 2014-08-13 | 林建省 | Pile foundation theory, lime soil pile carrying capacity and lime soil pile stirring impacting operation system |
| CN112301953A (en) * | 2020-11-25 | 2021-02-02 | 廊坊中达水利工程有限公司 | Construction method for river course slope protection slope toe by cement soil mixing pile |
| CN117868103A (en) * | 2024-02-20 | 2024-04-12 | 广州穗岩土木科技股份有限公司 | Construction method for stirring planting pile |
-
1991
- 1991-03-30 CN CN 91102056 patent/CN1065422A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831909A (en) * | 2010-05-11 | 2010-09-15 | 河海大学 | Cement mixing pile construction slurry flow real-time control device |
| CN102493431A (en) * | 2011-12-05 | 2012-06-13 | 中冶天工集团有限公司 | Real time monitoring strengthening method preventing pile foundation from descending |
| CN102493431B (en) * | 2011-12-05 | 2014-04-09 | 中冶天工集团有限公司 | Real time monitoring strengthening method preventing pile foundation from descending |
| CN103913560A (en) * | 2013-01-05 | 2014-07-09 | 中交武汉港湾工程设计研究院有限公司 | Real-time monitoring system of condensing state of concrete and real-time monitoring method |
| CN103913560B (en) * | 2013-01-05 | 2016-04-13 | 中交武汉港湾工程设计研究院有限公司 | The real-time monitoring system of concrete coagulation state and method of real-time |
| CN103981861A (en) * | 2013-05-17 | 2014-08-13 | 林建省 | Pile foundation theory, lime soil pile carrying capacity and lime soil pile stirring impacting operation system |
| CN112301953A (en) * | 2020-11-25 | 2021-02-02 | 廊坊中达水利工程有限公司 | Construction method for river course slope protection slope toe by cement soil mixing pile |
| CN117868103A (en) * | 2024-02-20 | 2024-04-12 | 广州穗岩土木科技股份有限公司 | Construction method for stirring planting pile |
| CN117868103B (en) * | 2024-02-20 | 2024-05-31 | 广州穗岩土木科技股份有限公司 | Construction method for stirring planting pile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Rahman et al. | In-line rheological measurements of cement grouts: Effects of water/cement ratio and hydration | |
| Yılmaz et al. | Predicting the uniaxial compressive strength of cemented paste backfill from ultrasonic pulse velocity test | |
| Halkola | Keynote lecture: Quality control for dry mix methods | |
| CN206752536U (en) | A kind of cast-in-situ bored pile bottom hole sediment measurement apparatus | |
| CN109781847B (en) | Method for detecting concrete slump through sound waves | |
| CN100510750C (en) | Method for in-situ detecting quality of deep-cement-mixed soil based on mixing uniformity | |
| Amziane et al. | Measurement of workability of fresh concrete using a mixing truck | |
| CN1065422A (en) | The real-time monitoring method for quality of cement mixing method | |
| CN109085326A (en) | A kind of pressure slip pipe instrument device and evaluation method detecting concrete pumpability | |
| Hover | Some recent problems with air-entrained concrete | |
| CN105424578A (en) | Method for measuring communicating porosity of concrete by using non-contact impedance method and testing device | |
| Sear et al. | Abrams law, air and high water-to-cement ratios | |
| CN101812854B (en) | Control method of construction quality of deep mixing piles based on energy consumption monitoring | |
| CN116907893A (en) | Evaluation system and method for submersible stirring effect | |
| KR102401974B1 (en) | Measuring device for managing mixture proportion | |
| Suraneni | Ultrasonic wave reflection measurements on self-compacting pastes and concretes | |
| CN115389369A (en) | Automatic change mud spot test device | |
| Druss | Guidelines for design and installation of soil-cement stabilization | |
| CN216209167U (en) | Detection device for concrete | |
| JP2867891B2 (en) | Measurement method of cement content in soil cement | |
| Puppala et al. | Special specification for deep soil mixing | |
| Murata et al. | New method of testing the flowability of grout | |
| EP0440825A1 (en) | Method of re-using slurry in ground improving construction work | |
| Håkansson et al. | In-line Measurements of Rheological Properties of Cement-Based Grouts-Introducing the UVP+ PD Method | |
| CN214616501U (en) | CFG pile drilling construction depth detection and construction control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |