CN1566544A - Method for monitoring pile foundation construction quality and reinforcing pile foundation by electric exploring method - Google Patents
Method for monitoring pile foundation construction quality and reinforcing pile foundation by electric exploring method Download PDFInfo
- Publication number
- CN1566544A CN1566544A CN 03126858 CN03126858A CN1566544A CN 1566544 A CN1566544 A CN 1566544A CN 03126858 CN03126858 CN 03126858 CN 03126858 A CN03126858 A CN 03126858A CN 1566544 A CN1566544 A CN 1566544A
- Authority
- CN
- China
- Prior art keywords
- concrete
- pile
- quality
- mud
- sensor
- 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.)
- Granted
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a method of quality monitoring and reinforcement technology for pile construction using electrical resistivity survey method, which is suitable for construction quality monitoring of bored pile, underground diaphragm wall, tube-sinking cast-in-situ pile, CFG pile, etc. It is mainly characterized in that electrical resistivity survey method is used to detect declogging quality, monitor construction quality of concrete perfusion, and as a result, concrete faults property, affected extent and producing reasons can be judged accurately; and in concrete flow state, faults consolidation can be taken and treatment effects can be detected after that; water quality of sound ranging pipe can be also detected; and underground potential flow can be detected and treated. The invention says goodbye to the time of empirical pile construction, improves engineering quality effectively, reduces loss and guarantees construction period.
Description
Pile foundation engineering is a concealed work, the factor that influences the pile foundation construction quality is ever-changing, the quality problems that occur are a lot, consequence is also very serious, the direct losses that cause because of the pile foundation construction quality problems in the annual whole nation are no less than several hundred million units, and the pile foundation that therefore grows up detection market reaches the scale more than 1,000,000,000 yuan.The pile foundation construction quality is the key point of Control Engineering quality, cost, duration.Detect the way that guarantees workmanship by checking and accepting behind the pile at present, seeming lags behind and must pay a price for this reason, and the pile foundation construction process monitoring becomes more and more important.Now existing plant and instrument that relevant hole quality detects, the precipitation soil thickness detects, the concrete interface detects influence some of pile foundation construction quality factors but can only detect, and can't detect the result of concrete construction quality.Pile foundation construction quality monitoring is the direction of engineering detecting development, but does not still have major progress so far.
The purpose of this invention is to provide that a kind of principle is simple, the reliable pile foundation construction quality monitoring of method and reinforcing technique, by detecting sand factor, precipitation soil thickness and the settling rate thereof of estimating mud, guarantee hole quality clearly; By technology such as pile concrete pouring quality monitoring and the detection of concrete spouting end face absolute altitude, minimum pipe laying depth monitorings, accurately, in time estimate the pile concrete construction quality, judge that defects property, influence degree and generation reason appear in the concrete spouting process; Conscientiously adopt this monitoring technique guiding construction, reduce the pile body concrete quality problem that causes because of the precipitation soil thickness exceeds standard, pipe laying depth control is not tight etc., eliminate short circuit pile crown phenomenon, guarantee that pile concrete is continuous; Guidance is adopted when the concrete fluidised form and is poured into displacement method, gas-lift slag discharging method, jet grounting etc. carry out consolidation process and monitoring consolidation process to rejected region effect repeatedly; Promptly sound detecting pipe water quality is detected behind the concrete perfusion, judge whether sound detecting pipe leaks water inlet mud or mud, clearly whether decision the hole, prevents the cement paste plugging and eliminates the phenomenon that causes the sounding erroneous judgement because of spillage in the pipe, reduces unnecessary loss; Detect to judge whether pore-forming passes underground undercurrent, concrete mix and concrete are caused serious erosion so that take measures to prevent underground undercurrent.Take leave of the age of pile foundation by effective construction monitoring, reach the raising workmanship, reduce the loss, guarantee the effect of duration by the experience construction.
The invention is characterized in that electrical resistivity survey instrument (1) is mounted on the sensor of being made up of fixed electrode on the neighboring of conduit (4) outlet in the pore-forming (12) of pile foundation (2) (5) by lead (3), utilize different medium that the principle of different resistance or resistivity is arranged, detect the character and the distribution of concrete mix (6) in the pore-forming (12), mud (13), sand different mediums such as (14), reach the order that the pile foundation construction quality is detected and monitors.
Different media has different resistance or resistivity, can cause that respective change takes place measuring circuit electrical measurement value (as parameters such as voltage, electric currents).According to experiment, the concrete mix of identical match ratio has certain resistance or resistivity, sensor (5) with the fixed electrode composition, when concrete mix is emanated, fusion during different mediums such as mud, respective change can take place in the electrical measurement value of the concrete mix of segregation, and with the segregation degree stronger dependency relation is arranged.Test shows that also the compressive strength of concrete disintegration degree and electrical measurement value and concrete component has dependency relation, therefore according to surveying the classification that electrical measurement value prediction concrete strength is divided concrete defect, can accurately estimate the concrete practice of construction quality level of pile foundation, go forward to go a step further in pile foundation construction quality monitoring and pile foundation Dynamic Non-Destruction Measurement.
Sensor (5) is installed on the align member (17) that is fixed on conduit (4) the outlet neighboring, makes all concrete construction qualities of the as close as possible stake of sensor (5) guarantee the relatively low position of probability by align member, to improve the fraction that detects effect.Evenly arrange a plurality of sensors with appropriate to the occasion at same section, detect the order of severity of defective and the position relation of each sensor, accurately judge defects property, distribution and influence degree according to each sensor.
Pile foundation quality of concreting problem is much with the installation of conduit with use relevant.Sensor (5) is installed on the interior Side face of conduit (4) outlet, is used for the quality situation of the concrete mix (6) in the detected catheter (4), can be used for monitoring tube and whether return slurry, defective such as whether the analysis and judgement conduit occurs breaking or joint is not tight.When quality problems occurring, also can utilize the control of this sensor that the concrete of emanating in the conduit is emitted on the normal concrete spouting end face, so that in time remove with gas lift method etc.Sensor (5) is installed in conduit (4) and is slightly larger than apart from outlet top or equals the 2m place, the minimum pipe laying depth of concrete that is used for monitoring tube (4), can prevent to put forward the too fast accident that causes conduit to return slurry of pipe, simultaneously also can be used for monitoring concrete quality of pipe laying and top of concrete elevation, to prevent accident such as short circuit pile crown.
For sinking concrete filling pile (19) and adopt the CFG stake (20) etc. of immersed tube technology perfusion, sensor (5) is installed on the sword pin or interior Side face of stake pipe (18), be used to monitor the pouring quality of the concrete of perfusion or the mixture of concrete mixture (6), prevent quality accidents such as broken pile, necking down.Whether have underground water, mud etc. flow into stake pipe (18) in, make the concrete disintegration of stake pipe (18) interior back cover if utilizing sensor (5) also to can be used for monitoring the immersed tube process.
The invention is characterized in and sensor (5) is directly inserted in the mud (13) of pore-forming (12) by lead (3), according to sand factor difference in the mud, the phenomenon that the resistance of mud or resistivity also can change thereupon, utilize the content of relative measure of the change mud (13) medium sand (14) of electrical measurement value, the situation of change and the thickness of precipitation soil (11) medium sand content at the bottom of the sand factor of computation of mud (13) and the analysis and judgement stake.Because the electrical property of different mud has than big difference, for detecting the sand factor in the mud, should be by demarcating relation and the correlation curve of confirming electrical measurement value and sand factor.Sensor (5) is directly inserted in the coupling water (16) of the pre-buried sound detecting pipe (15) of pile foundation (2) by lead (3), by measuring the water quality of coupling water (16), whether leak water inlet mud, mud etc. in the decidable sound detecting pipe, to prevent that water mud from solidifying the back and stopping up sound detecting pipe, or because impurity effects such as mud to the normal coupling of ultrasonic emitting and reception, cause the erroneous judgement to the pile body concrete quality testing result.
Utilize electric exploring method to detect outside the sand factor and precipitation soil thickness of mud, in pile foundation construction, also have other application, as by detecting the sand factor distribution situation of different depth in the hole, can further help to analyze the outstanding sand ability and the clear poroid attitude of mud, help to improve construction technology; Also can be by measuring the precipitation soil thickness after a settling rate of end precipitation soil thickness is estimated certain hour, the time that is used to instruct clear hole and determines to cut the ball concrete perfusion; In clear hole and concrete spouting process, increase suddenly when detecting the precipitation soil thickness, feeling to pop one's head in by lead directly contacts harder sediment relatively, can be judged as the hole that collapses to occur.
The invention is characterized in that having used above-mentioned principle monitors the consolidation process process of the segregating concrete mixture (7) of fluidised form and detect the effect of consolidation process.Adopting jet grounting that the segregating concrete mixture (7) of fluidised form is carried out consolidation process is characterised in that by Grouting Pipe (8), the nozzle (9) that will be connected Grouting Pipe (8) exit is presented to the predetermined position of pile body segregating concrete mixture (7), with pressure cement paste (10) etc. is penetrated from nozzle (9), cement paste (10) and segregating concrete mixture (7) and precipitation soil (11) etc. are mixed.For in time the defective concrete being carried out consolidation process, nozzle (9) directly should be fixedly mounted on the neighboring of conduit (4) outlet, when being installed, conduit installed and fixed Grouting Pipe and nozzle, utilize moving up and down and rotating of conduit (4) when spraying grouting and reinforcing, it can be sprayed arbitrary defective of conduit periphery.
For guaranteeing to have time enough pile defect to be carried out consolidation process when the concrete fluidised form, the concrete mix that adopts should have enough initial setting times, simultaneously the job site should have corresponding construction equipment, as high pressure slurry pump, mix equipment such as slurry pulp storing barrel, churning pipe.
Consolidation process to concrete defect should be selected different reinforcing and processing methods for use according to the defect property difference, takes out the slag method, cuts ball perfusion, open cut facture etc. again as pouring into displacement method, gaslift repeatedly.Adopt gas lift method to take out the slag method and handle the pile concrete defective, the scene should have equipment such as air compressor machine, appendix, scum pipe.
Engineering practice is told us, after the pouring quality of pile concrete mixture meets the demands, also may be subjected to the serious erosion of underground undercurrent before concrete initial set, cement paste is run off form major defect.After the invention is characterized in that certain hour is left standstill in the hole clearly, sensor (5) is inserted in the mud (13) of pore-forming (2) by lead (3), measure whether washing away, diluting and cause its resistance or resistivity to change, of mud (13) because of underground undercurrent (21) to judge the existence of underground undercurrent (21).To there being the location of underground undercurrent (21), on reinforcing cage (22) neighboring, add a water-proof jacket (23), by the buffer action of water-proof jacket (23), avoid the erosion of underground undercurrent (21) with the protection pile concrete.Water-proof jacket (23) can adopt steel plate, plastic plate or thicker impermeability materials such as Polypropylence Sheet to make.
The schematic diagram of Fig. 1 pore-creating filling pile quality of concreting monitoring.
The schematic diagram of the multi-faceted monitoring of Fig. 2 pore-creating filling pile quality of concreting.
The schematic diagram of Fig. 3 pore-forming stake clear hole quality examination.
The schematic diagram of Fig. 4 pile foundation sound detecting pipe water quality detection.
Fig. 5 handles the schematic diagram of pile foundation concrete mix defective principle with high-pressure injection method.
Fig. 6 handles the schematic diagram of pile defect principle with the gas-lift slag discharging method.
The schematic diagram of Fig. 7 tube-sinking cast-in-situ pile pouring quality monitoring.
Fig. 8 prevents and treats the schematic diagram of underground undercurrent to concrete corrosion with water-proof jacket.
The present invention utilizes different medium that different resistance or resistivity are arranged, can cause that the principle of respective change takes place for the voltage, electric current etc. of measuring circuit, electrical resistivity survey instrument (1) is mounted on the sensor (5) on the neighboring of conduit (4) outlet by lead (3), the character and the distribution of check and analysis pore-forming (12) inner concrete mixture (6), mud (13), sand different mediums such as (14), be used to detect the pouring quality of clear hole construction quality and concrete mix, the compressive strength of assessment segregating concrete mixture.Make the as close as possible stake periphery of sensor (5) by align member (17) during detection, to improve the fraction of testing result.Sensor (5) is installed on the interior Side face of conduit (4) outlet, the quality of can detected catheter (4) inner concrete mix, defective such as whether monitoring tube occur returning slurry, break or joint is not tight, and be used to control the discharging of the interior segregating concrete of conduit.Sensor (5) is installed in conduit (4) outlet top to be slightly larger than or to equal the 2m place, can monitor minimum pipe laying depth, prevent the concrete quality problem that takes place because of pipe laying is too shallow, also can monitor the concrete quality of pipe laying simultaneously, prevent accidents such as short circuit pile crown.Conscientiously adopt this monitoring technique guiding construction, can significantly reduce the generation of construction quality accident, effectively improve the construction quality level.The present invention can monitor the consolidation process process of the segregating concrete mixture (7) of fluidised form and detect the consolidation process effect.When adopting high-pressure injection method to handle the pile concrete defective, cement paste (10) waited penetrate, cement paste (10) is mixed with segregating concrete mixture (7) and precipitation native (11) etc. play reinforcement effect from nozzle (9); Nozzle (9) directly is fixedly mounted on the outlet neighboring of conduit (4), when quality problems appear in concrete, can carries out effective consolidation process to defective fast.Directly sensor (5) is presented in the mud (13) by lead (3), can detect the sand factor and the distribution situation of different depth in the pore-forming, change thickness and state, the mud that to judge precipitation soil (11) according to sand factor and hang grittiness energy, prediction precipitation soil thickness, be used to instruct pore-forming and clear hole to construct.Adopt electric exploring method can also in the check and analysis hole whether underground undercurrent (21) appear, when underground undercurrent (21) occurring, on the neighboring of reinforcing cage (22), add water-proof jacket (23), can protect pile concrete to avoid the erosion of underground undercurrent.Electric exploring method also can be used for detecting sound detecting pipe water quality, prevents that cement paste plugging and mud from impacting the sounding result.The present invention is applicable to the detection and the monitoring of a plurality of work progresss of cast-in-place concrete pile, diaphragm wall, tube-sinking cast-in-situ pile, CFG stake etc. on the spot, take leave of the age of pile foundation concealed work by the experience construction, reach and improve workmanship, reduce the loss, guarantee the effect of duration, especially the construction to the pile foundation of grow up stake and complicated geological structure has important practical significance and historic significance.
Embodiment 1.
Pile foundation quality of concreting monitoring I
As shown in Figure 1, be mounted on electrical resistivity survey instrument (1) on the neighboring of conduit (4) outlet by lead (3), by the sensor (5) that two fixed electrodes are made, measure the voltage Vr that causes because of the dielectric resistance variation and change the pouring quality of analyzing concrete mix.
1. by following requirement instrument is demarcated earlier before detecting.
1.1 by designing requirement concrete batching mixture.
1.2 the silt and the mud of precipitation at the bottom of getting, the SN of weighing blended amount respectively are 5.0%, 10.0%, 20.0% 30.0%, 40.0%, 50.0%, 60.0% silt particle and mud, join in the concrete mix step by step, and mix are even.Sensor is inserted into respectively survey in the mixture of concrete mix and reads corresponding voltage value Vri.
1.3 as 1.2 do parallel demarcation more than three times.
1.4. the mixed proportion as 1.2 is made corresponding concrete standard test specimen respectively, maintenance was done compressive strength test after 28 days.
1.5. draw the relation curve of magnitude of voltage Vr and concrete crushing strength R, magnitude of voltage Vr and blended amount SN, concrete crushing strength R and blended amount SN.
2. determine the criterion of concrete disintegration degree and judgement:
2.1 detect the foundation of differentiation and determining of criterion.
The size of the concrete strength of concrete disintegration degree utilization prediction is as basis for estimation.Check and accept factors such as evaluation criteria, structure service condition according to concrete construction controlling level, concrete strength, the criterion quasi-definite of concrete disintegration degree is:
Normal concrete criterion prediction concrete strength is the Vr value of 0.95R correspondence, is defined as Vra
Slight segregation criterion prediction concrete strength is the Vr value of 0.85R correspondence, is defined as Vrb
Obviously segregation criterion prediction concrete strength is the Vr value of 0.5R correspondence, is defined as Vrc
Serious segregation criterion prediction concrete strength is the Vr value of 0.25R correspondence, is defined as Vrd.
(R is the pile foundation concrete design strength)
2.2 the concrete disintegration degree defines.
Actual measurement Vr concrete mix when following scope is in following quality condition:
Vri 〉=Vra is normal concrete
Vra＞Vri 〉=Vrb is slight segregation
Vrb＞Vri 〉=Vrc obviously emanates
Vrc＞Vri 〉=Vrd is serious segregation
Vri＜Vrd is cement stabilized soil or silt particle
3. determine the principle that the pile concrete pouring quality is estimated.
According to the last testing result of each section of pile body, draft by following principle and estimate pile concrete pouring quality classification:
Each measuring point Vri of I class stake is all more than or equal to the Vra criterion.
The Vri of the indivedual measuring points of a certain detection section of II class stake is not less than the Vrb criterion.
The continuous a plurality of measuring points of a certain detection section of III class stake or two Vri values that detect the same measuring point of section are not less than Vrc.
The continuous a plurality of measuring points of a certain detection section of IV class stake or two value Vri that detect the same measuring point of section are less than Vrc.
4. standard and quality of concreting is monitored in real time by following requirement:
4.1 after cutting the ball concrete perfusion, remove mud that sensor surface adheres to etc. by inserting the cleaning of shaking, then conduit is returned be inserted at the bottom of, detect the pouring quality of stake base concrete.Confirm to cut ball success back and continue concrete perfusion, promote the quality of concreting that conscientiously detects and write down each section of pile body with conduit mouth;
4.2 the concrete spouting construction monitoring should make every effort to make pile body concrete quality to reach I class pile beacon standard;
4.3 when the stake of II class occurring, should encrypt measuring point, confirm that there is not more serious mass defect in pile body;
4.4 when III class or the stake of IV class occurring, should consider when the concrete fluidised form, in time pile concrete to be carried out consolidation process, and make the quality level after the processing be not less than II class stake requirement.
Pile foundation quality of concreting monitoring II
As shown in Figure 2, on conduit (4) outlet neighboring, evenly fixedly mount a, b, three sensors of c, define the character of concrete defect by following method by align member (17):
1.a, all to be not less than Vrd be concrete disintegration for the Vri of b, c three measuring point measuring points.
2.a, any two measuring points of b, c are necking down with interior Vri less than Vrd.
3.a, the Vri of b, c three measuring points is broken pile less than Vrd all.
The size of above-mentioned concrete defect is determined by the plan-position and the absolute altitude of three sensors.
Sensor d of fixed installation on the inwall of conduit (4) outlet selects when cutting ball to show the d passage, cuts ball concrete perfusion process conduit with observation and the slurry phenomenon whether occurs returning.Cut again conduit is inserted to behind the ball at the bottom of, detect the degree of concrete displacement pile bottom sediment and mud by a, b, three measuring points of c, confirm to cut ball and whether successfully reach the degree that segregation appears in a base concrete.Concrete spouting process sensor d is if detect defective and concrete pipe laying depth when suitable, should judge problems such as catheter rupture or pipe joint be not tight to occur.
Sensor e of fixed installation on the outer wall at the about 2.2m of distance conduit outlet place is used for the minimum pipe laying depth of monitored concrete.Another passage is inserted sensor f in the pore-forming by lead (3), is used to detect concrete spouting end face absolute altitude, and the difference of detected top of concrete elevation and conduit mouth absolute altitude is a pipe laying depth.When the precipitation soil thickness more than sensor f detects the concrete spouting end face increases suddenly, can be judged as the concrete perfusion process hole phenomenon that occurs collapsing.Utilize sensor f to detect the top of concrete elevation, detect the quality of pipe laying section concrete, prevent the local segregation of short circuit pile crown and pile crown concrete, low defective such as strong with sensor e and a, b, c.
All the other are with embodiment 1.
Clear hole quality examination
As shown in Figure 3, electrical resistivity survey instrument (1) is inserted sensor (5) in the mud (13) of pore-forming (12) by lead (3), measures the content of mud (13) medium sand (14) and judges a thickness and a state of end precipitation soil (11), and the implementation step of detection is as follows:
1. cross sieve about the 0.074mm of aperture with the mud in clear hole, the pure mud of getting after being no less than 4000g and sieving is that 0 mud is standby as sand factor.Produce process and should not add water or other chemical substances in addition, guarantee pure mud except that sand factor, use the physics and the chemical property of mud identical with engineering piles.
2. discharge the outer sediment of stake when getting hole clearly, with mud in the clear water flush away sand, dry (drying) back is crossed about the 1.5mm of aperture and is sieved, and it is standby to get 4000g sand.
3. fully stir evenly the pure mud of preparation, the 1000g mud that weighs with scale is poured in the plastic cup.
4. sensor f is inserted the plastic cup center, detecting head surface sinks to about mud face 5cm, record correspondent voltage value Vs.
5. be the sand amount that to add in 2.5%, 5.0%, 7.5%, 10.0%, 20.0%, 30.0%, 40.0%, 50.0% o'clock by sand factor SL, join in the mud step by step and stir, will pop one's head in to insert to survey in the mud as 4 requirements and read and write down corresponding voltage value Vs.
6. require to do three parallel demarcation as 5.
7. should be in three parallel calibration process, the viscosity and the proportion of corresponding mud when measuring or calculating sand factor at different levels.
8. get three demarcation results and average, and draw the calibration curve of sand factor SL and magnitude of voltage Vs.
9. according to the sand factor that detects and the relation of corresponding voltage value, viscosity and proportion.According to requirement and self construction equipment and the managerial skills about clear hole quality such as construction technique normalizing, the sand factor of correspondence when determining suitable clear hole standard and being defined as precipitation.
10. will pop one's head in and progressively put into the mud of pore-forming, the Vsi of record different depth checks in its sand factor by calibration curve.Should conscientiously measure and write down the situation of change of actual measurement Vs at the bottom of the hole with the 10cm step pitch.Probe is transferred process when Vs suddenlys change, and the absolute altitude of corresponding position is drafted to precipitating native end face absolute altitude.When precipitating native end face absolute altitude and whole hole at the bottom of the stake difference of absolute altitude be the precipitation soil thickness.
This method is in other application of pore-forming and clear hole process:
1. settling rate is measured and is precipitated soil thickness and estimates
Left standstill 60 minutes behind the clear hole, precipitation soil thickness h0, h30 and the h60 of correspondence at the bottom of the stake when measuring 0 minute, 30 minutes and 60 minutes respectively as 10 methods are calculated as follows settling rate
Δh＝(h60-H0)
Utilize Δ h to estimate the precipitation soil thickness that may occur when Kong Houzhi cuts the ball concrete perfusion clearly,
ht＝h0+Δh·t≤[h]
Its value should be less than standard and designing requirement, otherwise should strengthen clear hole or manage to reduce the time of cutting ball work; Or take measures to improve the outstanding sand ability of mud.
2. contain the analysis of sand slope
Pore-forming and clear hole process by detecting the sand factor of different depth in the hole, are calculated the slope that sand factor changes in the hole
Kh＝(SL2-SL1)
2/(H2-H1)
And relatively sand factor is understood suspension and the distribution of sand in the stake hole along the line style of the distribution curve of hole depth, and the deslagging ability when helping to analyze pore-forming and clear hole is used for guiding construction.
3. the hole that collapses is judged
Clear hole or concrete spouting process, detected precipitation soil thickness increases suddenly, and feeling to pop one's head in by cable directly contacts on the harder relatively sediment, can be judged as the hole that collapses to occur.
All the other are with embodiment 1.
The sound detecting pipe water quality detection
As shown in Figure 4, behind the pile foundation concrete perfusion, promptly detect the water quality of sound detecting pipe, according to the phenomenon of V slurry＞V mud＞V water with the electrical resistivity survey instrument.Sensor (5) is inserted respectively in the coupling water (16) of sound detecting pipe (15), it is the lower constant of voltage that sound detecting pipe is the detected electrical measurement value of clear water, if bleed cement paste or mud in the sound detecting pipe, respective change can take place the electrical measurement value.The difference of actual measurement mud end face absolute altitude and pipe laying bottom surface absolute altitude for precipitation highly, precipitate that sensor fails to lay down when serious.When actual measurement precipitated height greater than 1/2 ultrasonic transducer height, sound detecting pipe should be done hole processing clearly.If detect when bleeding cement paste pigging immediately, prevent that cement paste from solidifying the back plugging.
All the other are with embodiment 1.
Embodiment 5
Handle pile concrete defective I with high-pressure injection method
As shown in Figure 5, the nozzle (9) that will be connected Grouting Pipe (8) exit by Grouting Pipe (8) is presented to the predetermined position of pile body segregating concrete mixture (7), pressure with about 20Mpa penetrates cement paste (10) from nozzle (9), cement paste (10) and segregating concrete mixture (7) and precipitation soil (11) etc. are mixed.Can cooperate simultaneously utilize conduit to insert to shake, methods such as wing plate stirring that steering nozzle utilizes sensor installation stir it, concrete perfusion displacement and disperse method such as segregating concrete mixture to carry out consolidation process.Processing procedure after extremely the quality of the segregating concrete mixture of reinforcing reaches requirement, continues concrete perfusion by normal process by the method encryption detection of rotary guide pipe.
When concrete defect appears at casing and goes into the rock section, can adopt big churning pressure, make that churning pressure is unlikely to cause serious reaming but take an examination in general location to consider.
Adopt this method should be equipped with equipment such as high pressure slurry pump, slurry mixing tank, pulp storing barrel.
All the other are with embodiment 1.
Handle pile concrete defective II with high-pressure injection method
As shown in Figure 5, nozzle (9) directly is fixedly mounted on the neighboring of conduit (4) outlet, Grouting Pipe (8) adopts high pressure rubber hose, every the colligation of the 2m left and right sides on conduit, when finding the pile concrete segregation, the conduit mouth skewer to defective concrete below, is begun with cement paste the segregating concrete mixture to be carried out consolidation process.
All the other are with embodiment 5.
Embodiment 7
Handle the pile concrete defective with the gas-lift slag discharging method
As shown in Figure 6, occur adopting this law to handle when major defect, broken pile, filling process are collapsed hole etc. when pile body.
1. if broken pile occurs, be emitted on more than the broken pile face, and then conduit is inserted in the concrete below the broken pile face by the concrete of sensor d monitoring with mud in the conduit and segregation.
2. extract the concrete of sediment, mud interlayer and interlayer end face from top to down out with gas lift method.Take out the slag process and should note replenishing mud, keep head height to boring.
3. handle local serious segregating concrete with gas lift method, also should utilize mud to do concrete and sediment that carrier extracts segregation from top to down,
4. again during concrete perfusion, should utilize conduit to insert shake, concrete be flowed tamp the position that is extracted, and detect the construction quality of concrete mix.
Adopt this law scene should have equipment such as air compressor machine, appendix, scum pipe.
All the other are with embodiment 2.
Embodiment 8
Use the electric exploring method monitoring quality of pipe sinking poured pile
Tube-sinking cast-in-situ pile is a kind of quick construction, economic and practical stake type, but this quality of pile is stable inadequately, is easy to generate necking down, quality problems such as broken pile.As shown in Figure 7,, adopt the precast reinforced concrete pile point for improving the construction quality of tube-sinking cast-in-situ pile, at the sword pin place thickened steel-tube thickness of stake pipe (18) outlet, and otch fixed installation sensor (5), be connected to the electrical resistivity survey instrument by lead (3).For guardwire is not damaged in the concrete perfusion process, lead (3) passes in the shaped steel that is fixed on stake pipe (8) interior Side, draws outside the pipe in stake pipe (18) charging aperture below.
Earlier pour into the high concrete of 1.5m as bottom concrete in pipe before the immersed tube, whether each soil layer excess pore water of immersed tube process monitoring and mud enter in the pipe, if having water, mud to enter in the pipe, should improve the bottom concrete influx height.Tube drawing concrete perfusion process should conscientiously be monitored and be guaranteed that stake pipe outlet section has concrete to exist, and could continue tube drawing, otherwise should stop to pull out anti-inserting and vibration, and concrete is fallen.When detecting a stake pipe outlet concrete mix and emanate because of underground excess pore water infiltration, should come the balance excess pore water pressure by improving pipe inner concrete height, manage the inner concrete excessive height but should not make.2m and 3m place respectively add a sensor in pipe, to help detection and control valve inner concrete influx height between the 2m to 3m.
All the other are with embodiment 1.
Embodiment 9
The CFG construction monitoring
As shown in Figure 7, adopt composite foundation and CFG stake and plain concrete pile, have remarkable economic efficiency, be widely used, quality problems are more as tube-sinking cast-in-situ pile, by bury the method for sensor (5) underground in stake pipe (18) exit, the pouring quality that is used for monitored concrete mixture and mixture comes control construction quality.
All the other are with embodiment 8.
Embodiment 10
Underground undercurrent detects and prevents and treats method
Leave standstill certain hour behind the clear hole, wash away or dilute mud in the pore-forming, the dielectric of local mud is changed so that underground undercurrent enters.As shown in Figure 3, sensor (5) is inserted in the mud (13) of pore-forming (12) by lead (3), when the flowing to of the underground undercurrent of the unknown, should evenly arrange 4 survey groups apart from the about 10-20cm bilateral symmetry of week stake place, the dielectric of continuous measurement pore-forming (12) mud, emphasis detects the special geology location that undercurrent may occur, when the magnitude of voltage of measuring obviously reduces, get rid of sensor cover and may be stained with clod, should judge the underground undercurrent existence that has.By analyzing the rule that mud electrical measurement value in inner plane position, hole changes, judge the flow direction of underground undercurrent.
As shown in Figure 8, when finding that there is underground undercurrent in the pile body location, at this point section and up and down general (22) neighboring of reinforcing bar of each 1m scope correspondence add a steel casing as water-proof jacket (23).The diameter of steel casing is slightly less than design stake footpath, so that underground undercurrent is not subjected to underground undercurrent short-term and long-term erosion from stake week effluent mistake with the protection pile concrete.For the pile foundation that underground undercurrent occurs, should consider its influence to bearing capacity of pile foundation, it is long to increase stake in case of necessity.
All the other are with embodiment 1.
Claims (10)
1. the method for quality monitoring of electric exploring method pile foundation construction and reinforcing technique, it is characterized in that electrical resistivity survey instrument (1) is mounted on the sensor of being made up of fixed electrode on the neighboring of conduit (4) outlet in the pore-forming (12) of pile foundation (2) (5) by lead (3), utilize different medium that the principle of different resistance or resistivity is arranged, detect the character and the distribution of concrete mix (6) in the pore-forming (12), mud (13), sand different mediums such as (14), reach the purpose that the pile foundation construction quality is detected and monitors.
2. according to claim 1, it is characterized in that sensor (5) is installed on the medial surface of conduit (4) outlet the quality of the concrete mix (6) in the detected catheter (4).
3. according to claim 1, it is characterized in that sensor (5) is installed in conduit (4) and is slightly larger than apart from outlet top or equals 2 meters, be used for the minimum pipe laying depth of concrete of monitoring tube (4).
4. according to claim 1, it is characterized in that sensor (5) is installed on the sword pin or medial surface of stake pipe (18) mouth of pipe, be used for detecting the pouring quality of concrete mix (6) of the pore-forming (12) of tube-sinking cast-in-situ pile (19) and CFG stake (20).
5. according to claim 1, it is characterized in that sensor (5) directly being inserted in the mud (13) of pore-forming (12) by lead (3), measure the content of mud (13) medium sand (14), the situation of change of precipitation soil (11) medium sand content at the bottom of the sand factor of computation of mud (13) and the analysis and judgement stake.
6. according to claim 1, it is characterized in that sensor (5) directly being inserted in the coupling water (16) of the pre-buried sound detecting pipe (15) of pile foundation (2) by lead (3), measure the water quality of coupling water (16), judge the mud impurity such as (13) that whether bleeds in the sound detecting pipe (15).
7. according to claim 1, it is characterized in that monitoring the consolidation process process of segregating concrete mixture (7) and detecting the consolidation process effect by being installed in sensor (5) on conduit (4) the outlet neighboring.
8. as described in the claim 7, it is characterized in that by Grouting Pipe (8), the nozzle (9) that will be connected Grouting Pipe (8) exit is presented to the predetermined position of pile body segregating concrete mixture (7), with pressure cement paste (10) is penetrated from nozzle (9), cement paste (10) and segregating concrete mixture (7) and precipitation soil (11) etc. are mixed.
9. according to claim 1, after it is characterized in that certain hour is left standstill in the hole clearly, sensor (5) is inserted in the mud (13) of pore-forming (12) by lead (3), measure mud (13) whether because of the washing away, dilute and cause its resistance or resistivity to change of underground undercurrent (21), judge the existence of underground undercurrent (21).
10. as described in the claim 9; it is characterized in that existing the location of underground undercurrent (21) at pore-forming (12); add a water-proof jacket (23) on the neighboring of reinforcing cage (22), by the buffer action of water-proof jacket (23), the protection pile concrete is avoided the erosion of underground undercurrent (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031268587A CN1296572C (en) | 2003-06-16 | 2003-06-16 | Method for monitoring pile foundation construction quality and reinforcing pile foundation by electric exploring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031268587A CN1296572C (en) | 2003-06-16 | 2003-06-16 | Method for monitoring pile foundation construction quality and reinforcing pile foundation by electric exploring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1566544A true CN1566544A (en) | 2005-01-19 |
| CN1296572C CN1296572C (en) | 2007-01-24 |
Family
ID=34469085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031268587A Expired - Fee Related CN1296572C (en) | 2003-06-16 | 2003-06-16 | Method for monitoring pile foundation construction quality and reinforcing pile foundation by electric exploring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1296572C (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102127917A (en) * | 2010-12-03 | 2011-07-20 | 中国民航大学 | Low-strain testing device for detecting integrity of ultralong bored concrete pile |
| CN101592588B (en) * | 2009-06-23 | 2012-01-04 | 中国海洋石油总公司 | Pile soil interaction mechanism testing device for riser |
| CN101004400B (en) * | 2006-01-17 | 2012-06-27 | 凯特科学研究所股份有限公司 | Defect detecting/degree-of-filling-in measuring apparatus for concrete during placement and method for defect detection/degree of filling-in measurement for the same |
| CN103437358A (en) * | 2013-09-13 | 2013-12-11 | 杭州银博交通工程材料有限公司 | Concrete pouring control system and method for cast-in-place pile |
| CN105275005A (en) * | 2015-10-16 | 2016-01-27 | 浙江工业大学 | Method for detecting pile foundation post-grouting quality by using electrical method well logging system |
| CN106013160A (en) * | 2016-06-29 | 2016-10-12 | 江苏中海昇物联科技有限公司 | Cast-in-place concrete pile grouting height control device and using method thereof |
| CN106124569A (en) * | 2016-08-30 | 2016-11-16 | 北京智博联科技股份有限公司 | A kind of for measuring the reinforced bar sleeve grouting probe of plumpness and method |
| CN106198641A (en) * | 2016-08-30 | 2016-12-07 | 北京智博联科技股份有限公司 | The probe of resistivity of media in measurement prefabricated concrete structure reinforced bar sleeve |
| CN106948385A (en) * | 2017-03-31 | 2017-07-14 | 江苏中海昇物联科技有限公司 | Concrete parameters test experience device |
| CN108086323A (en) * | 2018-02-02 | 2018-05-29 | 北京市政建设集团有限责任公司 | A kind of concrete construction control method |
| CN108107193A (en) * | 2017-12-15 | 2018-06-01 | 哈尔滨工业大学 | A kind of test device and method of fresh concrete education resistance energy |
| CN108368684A (en) * | 2015-12-03 | 2018-08-03 | 韩国地质资源研究院 | Utilize the basement rock grouting monitoring method of resistivity |
| CN110130419A (en) * | 2019-05-29 | 2019-08-16 | 华侨大学 | A kind of cement mixing pile detection of construction quality device and method |
| CN110230327A (en) * | 2019-04-02 | 2019-09-13 | 中建港务建设有限公司 | A kind of real-time monitoring system and method for sandy pile construction quality |
| CN111663524A (en) * | 2020-07-14 | 2020-09-15 | 东华理工大学 | Cast-in-place pile pouring elevation monitoring device and construction method thereof |
| CN114622605A (en) * | 2022-03-11 | 2022-06-14 | 国网甘肃省电力公司经济技术研究院 | Resistance tomography monitoring device and monitoring method for cast-in-place concrete pile |
| CN117091497A (en) * | 2023-10-16 | 2023-11-21 | 中铁大桥局集团有限公司 | Device and method for dynamically monitoring concrete slurry interface of bored pile |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB964267A (en) * | 1961-12-05 | 1964-07-22 | Foundation Engineering Ltd | Improvements in and relating to the measurement of the resistance offered by an area of soil to the movement of a pile installed for building and like purposes |
| JPS6259731A (en) * | 1985-09-11 | 1987-03-16 | Hazama Gumi Ltd | Inspection for defective covering of reinforced concrete structure |
| US5099696A (en) * | 1988-12-29 | 1992-03-31 | Takechi Engineering Co., Ltd. | Methods of determining capability and quality of foundation piles and of designing foundation piles, apparatus for measuring ground characteristics, method of making hole for foundation pile such as cast-in-situ pile and apparatus therefor |
| JP2548980B2 (en) * | 1988-12-29 | 1996-10-30 | 株式会社ジオトップ | Judgment of performance / quality of foundation piles, design method, and ground performance measurement device |
| CN2233948Y (en) * | 1995-11-02 | 1996-08-28 | 徐晓原 | Quality monitoring controller for sunk pouring pile |
| CN1294299A (en) * | 1999-10-27 | 2001-05-09 | 山东矿业学院 | CT technique for dynamically detecting deformation destroy of rock mass |
-
2003
- 2003-06-16 CN CNB031268587A patent/CN1296572C/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004400B (en) * | 2006-01-17 | 2012-06-27 | 凯特科学研究所股份有限公司 | Defect detecting/degree-of-filling-in measuring apparatus for concrete during placement and method for defect detection/degree of filling-in measurement for the same |
| CN101592588B (en) * | 2009-06-23 | 2012-01-04 | 中国海洋石油总公司 | Pile soil interaction mechanism testing device for riser |
| CN102127917A (en) * | 2010-12-03 | 2011-07-20 | 中国民航大学 | Low-strain testing device for detecting integrity of ultralong bored concrete pile |
| CN103437358A (en) * | 2013-09-13 | 2013-12-11 | 杭州银博交通工程材料有限公司 | Concrete pouring control system and method for cast-in-place pile |
| CN105275005A (en) * | 2015-10-16 | 2016-01-27 | 浙江工业大学 | Method for detecting pile foundation post-grouting quality by using electrical method well logging system |
| CN108368684A (en) * | 2015-12-03 | 2018-08-03 | 韩国地质资源研究院 | Utilize the basement rock grouting monitoring method of resistivity |
| CN108368684B (en) * | 2015-12-03 | 2021-01-08 | 韩国地质资源研究院 | Bedrock grouting monitoring method using resistivity |
| CN106013160A (en) * | 2016-06-29 | 2016-10-12 | 江苏中海昇物联科技有限公司 | Cast-in-place concrete pile grouting height control device and using method thereof |
| CN106013160B (en) * | 2016-06-29 | 2018-07-20 | 江苏中海昇物联科技有限公司 | Cast-in-place concrete pile influx height control device and its application method |
| CN106124569A (en) * | 2016-08-30 | 2016-11-16 | 北京智博联科技股份有限公司 | A kind of for measuring the reinforced bar sleeve grouting probe of plumpness and method |
| CN106198641A (en) * | 2016-08-30 | 2016-12-07 | 北京智博联科技股份有限公司 | The probe of resistivity of media in measurement prefabricated concrete structure reinforced bar sleeve |
| CN106948385A (en) * | 2017-03-31 | 2017-07-14 | 江苏中海昇物联科技有限公司 | Concrete parameters test experience device |
| CN108107193A (en) * | 2017-12-15 | 2018-06-01 | 哈尔滨工业大学 | A kind of test device and method of fresh concrete education resistance energy |
| CN108086323A (en) * | 2018-02-02 | 2018-05-29 | 北京市政建设集团有限责任公司 | A kind of concrete construction control method |
| CN110230327A (en) * | 2019-04-02 | 2019-09-13 | 中建港务建设有限公司 | A kind of real-time monitoring system and method for sandy pile construction quality |
| CN110230327B (en) * | 2019-04-02 | 2022-04-01 | 中建港航局集团有限公司 | Real-time monitoring system and method for sand pile construction quality |
| CN110130419A (en) * | 2019-05-29 | 2019-08-16 | 华侨大学 | A kind of cement mixing pile detection of construction quality device and method |
| CN111663524A (en) * | 2020-07-14 | 2020-09-15 | 东华理工大学 | Cast-in-place pile pouring elevation monitoring device and construction method thereof |
| CN114622605A (en) * | 2022-03-11 | 2022-06-14 | 国网甘肃省电力公司经济技术研究院 | Resistance tomography monitoring device and monitoring method for cast-in-place concrete pile |
| CN117091497A (en) * | 2023-10-16 | 2023-11-21 | 中铁大桥局集团有限公司 | Device and method for dynamically monitoring concrete slurry interface of bored pile |
| CN117091497B (en) * | 2023-10-16 | 2024-01-16 | 中铁大桥局集团有限公司 | Device and method for dynamically monitoring concrete slurry interface of bored pile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1296572C (en) | 2007-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1296572C (en) | Method for monitoring pile foundation construction quality and reinforcing pile foundation by electric exploring method | |
| CN110528511A (en) | A kind of the impact drilling pile construction method | |
| CN1924534A (en) | Method for detection and stopping leak for concrete buildings leakage source | |
| CN105926596B (en) | It is a kind of for stirring the agitating device and stirring means of ooze | |
| JP2010222809A (en) | Method for refilling inside of cable sheath of existing prestressed concrete (pc) structure with grout | |
| CN109024569A (en) | A kind of beading solution cavity pretreatment construction method | |
| CN107246007B (en) | A kind of CFG of construction method | |
| CN101078219A (en) | Tower crane foundation for construction and manufacturing method thereof | |
| CN102220762A (en) | Method and device for disposing underwater pouring concrete pile breaking accident | |
| CN115045270A (en) | Method for constructing cast-in-situ bored pile | |
| CN105136072B (en) | A kind of Tunnel Lining Cracks depth measurement method and measurement apparatus | |
| Ibragimov | Characteristics of Soil Grouting by Hydro-Jet Technology. | |
| CN101545259B (en) | Device and method for non-underwater concreting by using drilled pile | |
| CN108842839A (en) | A kind of installation method of bridge foundation washout monitoring device | |
| CN205333347U (en) | Movable water sampling device on intellectual detection system stationary flow layer | |
| CN110485413B (en) | Combined type protection rapid hole forming method for pile foundation of viaduct adjacent to subway | |
| CN208763077U (en) | A kind of concrete perfusion liquid level position monitor | |
| CN106759559A (en) | A kind of steel pipe reinforces piling strtucture and its construction method | |
| CN116537125B (en) | Sluice bottom plate void area targeting positioning and repairing method | |
| CN218373831U (en) | Anchor cable structure for karst fracture development zone | |
| CN117554432B (en) | Pile body pile forming quality prediction system and method for high-pressure jet grouting pile | |
| CN210315552U (en) | Mud proportion control device for cement mixing pile | |
| CN108446500A (en) | A method of estimation the prominent of tunnel privileged site gushes hidden danger form and disaster degree | |
| CN107724394A (en) | Tubing string cofferdam underwater gliders system and construction method | |
| CN211348109U (en) | Electrolytic manganese solution on-line measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |