CN108166541A - The detection method of pile quality in reinforced concrete structure or hard whole basement rock - Google Patents

Abstract

The invention discloses a kind of detection methods of pile quality in reinforced concrete structure or hard whole basement rock, belong to Construction for Hydroelectric Project technique and Quality Control Technology field.A kind of detection method for pile quality in reinforced concrete structure or hard whole basement rock that can be effectively monitored to the construction quality of the various processes in work progress is provided.The detection method includes stake holes diameter, the detection of verticality and the detection of the concrete-pile pouring quality after the completion of pouring, wherein, when being detected to the diameter of stake holes, verticality, cage is visited using reinforcing bar it is equipped with the total powerstation with prism function and be detected；When the quality poured to the concrete-pile after the completion of pouring is detected, it is detected using ultrasonic wave or core boring sampling mode.

Description

The detection method of pile quality in reinforced concrete structure or hard whole basement rock

Technical field

The present invention relates to a kind of detection method, more particularly, in a kind of reinforced concrete structure or hard whole basement rock into The detection method of quality of pile belongs to Construction for Hydroelectric Project technique and Quality Control Technology field.

Background technology

In water power hydraulic engineering in reinforced concrete structure or hard whole basement rock fast pore-creating construction method conduct A kind of engineering measure of based process builds etc. in engineerings in the highway in China, railway, mine, room and obtains different degrees of application. At present other than being used for general soil layer and the softer foundation engineering of rock, in some skyscrapers, bridge, railway, mine, highway The support of load-bearing basis or retaining wall is used as in engineering construction.It is mainly used to penetrate firm hard formation in water power hydraulic engineering The basis of erosion control, impervious effect and agent structure is played to works, can be used for undertake earth-retaining, water-retaining structure object support Horizontal, vertical, antitorque load, can also be used as the consolidation process of reinforced concrete structure in water.

In China's water power hydraulic engineering, using in the reinforced concrete structure or hard whole basement rock fast pore-creating apply Work method can solve commonly drill inaccessiable quality, duration, safe effect.But this construction method, at present at me It there is no precedent that can seek in state's water power hydraulic engineering, the bottleneck of these construction technologies made to annoying construction building row always for many years Industry so that reinforced concrete structure or solid rock pore-forming are difficult to be promoted.How current construction technology means are combined, to it Works carries out reasonably optimizing.It can meet while works requires in itself and be conducive to rapid construction again, be always in industry The target try hard to gain.Meanwhile how to detect and control the drilling in formation of pile and pile quality and will be described Fast pore-creating construction method is introduced into essential means during hydraulic and hydroelectric engineering is built.

Invention content

The technical problems to be solved by the invention are：There is provided it is a kind of can effective applying to the various processes in work progress The detection method for pile quality in reinforced concrete structure or hard whole basement rock that working medium amount is monitored.

Used technical solution is to solve above-mentioned technical problem：A kind of reinforced concrete structure or hard whole basement rock The detection method of middle pile quality, the detection method include stake holes diameter, the detection of verticality and mixed after the completion of pouring The detection of solidifying soil stake pouring quality,

Wherein, when being detected to the diameter of stake holes, verticality, cage is visited using reinforcing bar and is equipped with the complete of prism function Instrument of standing is detected；When the quality poured to the concrete-pile after the completion of pouring is detected, taken using ultrasonic wave or drill core Sample loading mode is detected.

The beneficial effects of the invention are as follows：The application visits cage by using reinforcing bar and is equipped with the total powerstation detection with prism function Stake holes diameter and verticality detect by using the mode of ultrasonic wave or core boring sampling and the concrete-pile after the completion of pouring are poured Quality, realize to the hole quality and the comprehensive monitoring of pile quality in bore forming method, reach in work progress The purpose that the construction quality of various processes is effectively monitored, for will in reinforced concrete structure or hard whole basement rock it is quick The construction method of pore-forming is introduced into hydraulic and hydroelectric engineering construction and establishes solid foundation.

Further, it is equipped with the total powerstation progress stake holes diameter with prism function, verticality visiting cage using reinforcing bar It is to carry out in the steps below during detection,

First the plan-position of stake and pile foundation crest level are detected with total powerstation；Make again a 6m-12m long, diameter be less than set It counts the reinforcing bar within stake diameter 2cm and visits cage, the diameter and vertically that cage detect stake holes during stake holes is put into is visited by the reinforcing bar Degree.

Further, when visiting cage detection stake holes diameter by the reinforcing bar, reinforcing bar is visited using hanging device by cage Stake holes bottom surface slowly is put into from stake holes top surface, the steel cable for visiting cage during being put into for lifting by crane reinforcing bar must be placed in the middle, if suitable Profit passes through, then the diameter of stake holes meets design requirement；

At the same time, using the total powerstation with prism function, the steel cable that alignment lifting reinforcing bar visits cage is calculated per next rice Coordinate value, and determine whether the verticality of stake holes meets design requirement according to result of calculation.

Further, after intensity reaches more than 90% after concreting, then taken using ultrasound examination or drill core The mode of sample carries out the detection of concrete-pile pouring quality.

Further, before ultrasound examination is carried out, first whether the water in the type ultrasonic testing tube of inspection pre-plugged It fills, it is then whether unimpeded with the shot survey type ultrasonic testing tube less than ultrasound examination bore, measure ultrasonic wave with lining rope Whether there is sediment in detection pipe, detect the pouring quality of concrete-pile after qualification to be checked with ultrasound measuring instrument again.

Further, the type ultrasonic testing tube is installed to the corresponding of the steel reinforcement cage in the manufacturing process of steel reinforcement cage On position, and two ends are closed before being lifted into stake holes with steel reinforcement cage,

Wherein, seal operation is completed in the lower end of the type ultrasonic testing tube before lifting into stake holes, and upper end is mixed Solidifying soil completes closing work after water is filled before pouring.

Description of the drawings

Fig. 1 is the use that the detection method of pile quality in reinforced concrete structure of the present invention or hard whole basement rock is related to Reinforcing bar visits cage detection stake holes diameter and the schematic diagram of verticality；

Fig. 2 is related to super for the detection method of pile quality in reinforced concrete structure of the present invention or hard whole basement rock The layout drawing of sonic detecting tube；

Fig. 3 a~Fig. 3 c are that the detection method of pile quality in reinforced concrete structure of the present invention or hard whole basement rock relates to And self-control drilling tool structure diagram；

Fig. 4 is applied for what the detection method of pile quality in reinforced concrete structure of the present invention or hard whole basement rock was related to The flow chart of work technique.

In figure label for：Stake holes 1, reinforcing bar visit cage 2, type ultrasonic testing tube 3, steel reinforcement cage 4, bucket tooth 5, drill body 6.

Specific embodiment

Be as shown in Figure 1 and Figure 2 it is provided by the invention it is a kind of can be effectively to the construction matter of the various processes in work progress Measure the detection method for pile quality in reinforced concrete structure or hard whole basement rock being monitored.The detection side Method includes 1 diameter of stake holes, the detection of verticality and the detection of the concrete-pile pouring quality after the completion of pouring, wherein, to stake When the diameter in hole, verticality are detected, the total powerstation with prism function is equipped with using reinforcing bar spy cage 2 and is detected；Right When the quality that concrete-pile after the completion of pouring pours is detected, it is detected using ultrasonic wave or core boring sampling mode.This Application visits cage 2 by using reinforcing bar and is equipped with total powerstation detection 1 diameter of stake holes and verticality with prism function, by using super The mode of sound wave or core boring sampling detects the quality poured to the concrete-pile after the completion of pouring, realizes in bore forming method Hole quality and pile quality comprehensive monitoring, reach and the construction quality of the various processes in work progress effectively supervised The purpose of survey, for the construction method of the fast pore-creating in reinforced concrete structure or hard whole basement rock is introduced water conservancy and hydropower work Solid foundation is established in Cheng Jianshe.

In the above embodiment, in order to improve the stability in the precision and monitoring process of the monitoring of stake holes 1, using reinforcing bar It is to carry out in the steps below, first when spy cage 2 is equipped with 1 diameter of total powerstation progress stake holes with prism function, measuring for verticality The plan-position of stake and pile foundation crest level are detected with total powerstation；Make again a 6m-12m long, diameter be less than design stake diameter 2cm with Interior reinforcing bar visits cage 2, detects the diameter and verticality of stake holes 1 during stake holes 1 is put by reinforcing bar spy cage 2；And When visiting detection 1 diameter of stake holes of cage 2 by the reinforcing bar, reinforcing bar is visited slowly from 1 top surface of stake holes using hanging device by cage 2 1 bottom surface of stake holes is put into, the steel cable for visiting cage 2 during being put into for lifting by crane reinforcing bar must be placed in the middle, if passed through, stake holes Diameter meets design requirement；At the same time, using the total powerstation with prism function, alignment lifting reinforcing bar visits the steel cable measuring and calculating of cage 2 Go out the coordinate value per next meter, and determine whether the verticality of stake holes 1 meets design requirement according to result of calculation.

Meanwhile in order to ensure the reliability detected to the concrete-pile pouring quality after the completion of pouring and improve detection Feelings degree and be conveniently operated, after intensity reaches more than 90% after concreting, then using ultrasound examination or core boring sampling Mode carry out the detection of concrete-pile pouring quality, before ultrasound examination is carried out, first check the ultrasonic wave inspection of pre-plugged Whether whether the water in test tube 3 fills, then unimpeded with the shot survey type ultrasonic testing tube 3 less than 3 internal diameter of type ultrasonic testing tube, Whether type ultrasonic testing tube 3 in have sediment, again with ultrasound measuring instrument detection concrete-pile after qualification to be checked if being measured with lining rope Pouring quality, the type ultrasonic testing tube 3 are installed in the manufacturing process of steel reinforcement cage on the corresponding position of the steel reinforcement cage 4, And two ends are closed before being lifted into stake holes 1 with steel reinforcement cage 4, wherein, the lower end of the type ultrasonic testing tube 3 exists Lifting completes seal operation before entering stake holes 1, and closing work is completed in upper end after water is filled before concreting.

The application is other than providing above-mentioned detection method, is additionally provided such as attached drawing 3a, attached drawing 3b and attached drawing 3c institutes The self-control drilling tool shown.Wherein Fig. 3 a are a kind of structure diagram for making core drill by oneself, and Fig. 3 b are another knot for making core drill by oneself Structure schematic diagram, Fig. 3 c are the structure diagram that the broken core of self-control bores.

Self-control drilling tool shown in wherein attached drawing 3a and attached drawing 3b is self-control core drill, which includes 5 He of bucket tooth Drill body 6 with coring chamber, the bucket tooth 5 are arranged on the lower face of the drill body 6, the self-control coring The top for drilling through the drill body 6 is connect with external drilling rod；Slag core in stake holes preparation process passes through the coring Chamber discharges the stake holes under the cooperation of outer drill rod with drill body 6.The bucket tooth 5 and drill body 6 are by having strong resistance to heat and hard wearing Steel plate is made.At this point, difference of the self-control core drill according to the environment used, it can be with following two structures, Yi Zhongjie Structure is that the bucket tooth 5 is arranged to double structure, i.e., the drilling tooth and a toothrow of arrangement are inclined outwardly including a toothrow point The cut-out tooth of point inward slant arrangement, wherein the drilling tooth is distributed on the brill along the circumferential direction of the first end face of the drill body 6 Has the outside of the first end face of ontology 6, the diameter for the annulus that the crown of drilling tooth described in each part is formed is more than the tube structure The outer diameter of first end face；The circumferential direction of the cut-out tooth along the first end face of the drill body 6 is distributed on the first end face of the drill body 6 Inside, the diameter of annulus that the crown of cut-out tooth described in each part is formed are less than the internal diameter of the first end face of the tube structure.In this way, Since two rows of bucket tooths 5 can cut out the gap more than tube structure side wall inside and outside respectively in boring procedure, so as to Effectively to improve slag core by the coring chamber, the effect of stake holes is discharged with drill body 6 under the cooperation of outer drill rod, Slag core and/or hole wall and the side wall of tube structure is avoided to generate to rub and control and generate heat as possible again simultaneously.

The self-control core drill of above-mentioned this double Tooth structure is primarily adapted for use in such as reinforced concrete structure or hard rock Pore-forming on the hard ground such as stone.And when need rock is hard or soft geology on pore-forming when, due to the requirement phase to bucket tooth To relatively low, it is usually required mainly for loose dregs is quickly cleared out a machine bottom hole by being easy for of consideration.For this purpose, as shown in fig. 3b, this Application provides the self-control core drill of another structure, i.e., at this point, setting a bucket tooth peace again on the first end face of cylinder It shelves, the bucket tooth 5 described in each part is mounted on by the way that the bucket tooth mounting bracket is radially even on the first end face, pore-forming Loose dregs in the process is limited in the coring intracavitary by the bucket tooth mounting bracket.At this point, the bucket tooth mounting bracket Preferred structure is a truss for including slag core entrance, and the side of the truss is connect with the first end face, the truss The opposite side installation bucket tooth 5.

Corresponding with the self-control core drill of above structure, as shown in Figure 3c, present invention also provides one kind to be used in reinforcing bar Pore-forming on concrete structure or solid rock ground, especially too long in longitudinal reinforcement, concrete core sample can not or inconvenient to take When rising, core brill is broken in the self-control that break process is carried out to core sample.The self-control breaks core brill and includes cone there are one drilling blade and tools The drilling cramp at shape tip, the drilling blade is arranged along the conical surface sequence of the cone point, along the conical surface of the cone point The cutting end of drilling blade forms the bullet shaped drilling conical surface described in each part of sequence arrangement, and the self-control breaks core and drilled through institute The rear end for stating drilling cramp is connect with external drilling rod.Using the self-control of structure core is broken to bore, due to the entire drilling conical surface be in bullet-shaped, And the composition that the drilling conical surface is drilling blade cut end intermittence described in more than one piece, so as to can both improve the work(of cutting Can, while the defects of cutting force caused by can occurring heavy damage and whole cutting face to avoid drilling blade again is excessive, it is real Now break the function that core bores.When by the basis of pore-forming along sectional such as reinforced concrete structure or heavily fortified point existing for depth direction After the basis of hard rock crushes, above-mentioned self-control core drill can be reused again and carries out fast pore-creating and slags tap.

Certainly, in order to improve the drilling ability that the broken core of self-control described herein bores, simplify structure, the drilling cramp includes Transition truss and the high-strength wearable supporting rack for being packed in the transition truss front end, the cone point are arranged on the high-strength wearable The free end of supporting rack, projection of the free end in its cross section is in cross-shaped configuration, the drilling blade described in each part Along the cross-shaped configuration four vertex sequence arrange, the drilling cramp by be in taper type structure the transition truss small end It is connect with external drilling rod.Meanwhile be arranged to be cast or forged by high-strength wearable steel by the high-strength wearable supporting rack, And make made of high-strength wearable steel alloy between the drilling blade and the high-strength wearable supporting rack by being welded to connect For one all day body.

And in order to reduce the fretting wear degree of drilling tool and reinforced concrete structure or hard whole basement rock, the bucket tooth The drilling tooth of arrangement is inclined outwardly including a toothrow point, the drilling tooth is distributed on along the circumferential direction of the drill body lower face The outside of the drill body lower face.The bucket tooth further includes the cut-out tooth of toothrow point inward slant arrangement, and described cuts Broken teeth is distributed on the inside of the drill body lower face wherein along the circumferential direction of the drill body lower face.In this way, inside the Two row's bucket tooths, that is, drilling tooth makes core diameter become less than coring chamber, reduces inside drilling tool between core sample for cutting coring Friction, make core sample longer, number of slagging tap is few, and construction benefit is high；Outside first row bucket tooth cuts off tooth, for making drilling tool and original The distance increase of works, reduces the friction of drilling tool and original structure object, improves the service life of drilling tool, saved and changed drilling tool Number accelerates construction speed；Specific geometric dimension --- make core sample longer, core sample take-off speed is fast, subtracts small core sample with boring Have the friction of inner top, extend the service life of drilling tool, saved construction cost, accelerate construction progress, ensure that pore-forming matter Amount；Alloy steel-tooth is resistant to high-temperature wearable, and stronger to the cutting force of hard rock-concrete reinforcing bar, and cutting speed faster, saves The tooth time is about changed, improves penetration rate, has saved construction cost.Meanwhile another structure that the application uses is produced certainly Core bores, and can be adapted for not hard to rock or soft geology, can quickly remove dregs；The loose of a machine bottom hole can be cleared out rapidly Dregs.In short, during using this self-control drilling tool coring, core sample is long, and torque is big during brill, and coring bottom is easily disconnected with next original core, The disposable extraction efficiency of core sample is high, while causes pressure increase when drilling rod is contacted with drilling tool, and torque reduces, and avoids drilling rod well Head twists off, and drilling tool is prevented to fall into hole, has greatly saved construction cost, and improve and ensure that hole quality and speed. The self-control that the application provides breaks core and bores i.e. point bucket brill, too long suitable for longitudinal reinforcement, when concrete core sample can not take, using point Bucket, which bores, destroys core sample, and concrete slag and longitudinal reinforcement are taken out in part.During pore-forming, when longitudinal boulder diameter is slightly less than aperture, longitudinal direction Size is too deep, using this brill, can destroy boulder rapidly, take out dirt slag, fast pore-creating.

The specific embodiment of the present invention is further described with reference to embodiment, is not therefore limited the present invention System is among the embodiment described range.

Embodiment one

1st, engineering method feature

1.1 are effectively solved using fast pore-creating method in tendon concrete structure or hard whole basement rock in reinforced concrete Without explosion on soil structure object, works fast pore-creating construction difficult problem is not destroyed, so as to ensure that the requirement of quality, safety.

The 1.2 effective levels of ground water that solve are higher, and infiltration is larger in the hole in, pile foundation top surface absolute altitude shallower rock under water Stone.Pore-forming is without draining, Anti-seeping technology on reinforced concrete structures.

1.3 do not use mud when solving pore-forming, are effectively protected the balance of ecological environment, have saved construction site.

1.4 are marched into the arena, are appeared on the scene using fast pore-creating method in tendon concrete structure or hard whole basement rock, equipment, power supply Requirement, in construction site ground requirement it is low

1.5 using fast pore-creating method in tendon concrete structures or hard whole basement rock, does not have in hole during concreting Muddy water pours so that concrete does not have interlayer, be effectively guaranteed concrete combined with original structure object it is more closely knit.

When handling reinforced concrete structures reinforcing, it is effectively guaranteed binding ability of the new-old concrete without interlayer. It is poured using clear water pile underwater concrete so as to concreting so that concreting not slag inclusion, sediment is few in stake, ensure that The quality of casting concrete.

1.6 using fast pore-creating method in tendon concrete structure or hard whole basement rock, during speedily carrying out rescue work, no matter day Vaporous condition, geological conditions quality, can quickly put into emergency work construction.

2nd, the scope of application

This construction method be used for soft formation, gravel-boulder bed, severely-weathered layer to weak weathered layer and reinforced concrete structures in into Hole, be particularly suitable for cannot use explosion geology and reinforced concrete structures in and shallow water in reinforced concrete structures and Block stone carries out consolidation process and the quick works for handling side near water.It can be quickly hard whole during flood-fighting Grooving, pore-forming on body rock.If, not only can be with fast pore-creating using the method there is during pernicious gas under stratum, and energy Pernicious gas is excluded in time, is eliminated safe hidden trouble.Stake diameter is in the stake slot of 0.6m-2.5m, pile foundation and rock of the depth within 80m Stone or works intensity are in the stake slot engineering of 5-70MPa.

3rd, technological principle

It is combined using ordi-nary drilling machine with homemade various drilling tools and by the employee of Special Training in solid rock and steel Tendon concrete structure pore-forming.The mode of fast pore-creating is rotation, cutting.Simultaneously in stake according to the design needs, steel reinforcement cage is divided into, Embedding type ultrasonic testing tube carries out underwater casting using the concrete of high quality.

4 construction technology process and key points for operation

4.1 construction technology process, as shown in Figure 4.

4.2 key points for operation

4.2.1 measurement is put a little

According to pile foundation coordinate using total powerstation setting-out, and perform hole position label.

It is built 4.2.2 stake is faced

The security protection of aperture Spiral digging machine operative radius

4.2.3 stake pore-creating

Using common Spiral digging machine and self-control drilling tool drilling, the mode for the slagging-off that drills is gone out using different self-control drilling tool liftings Slag, the almost size of drilling must satisfy design requirement.The key points for operation of drilling are as follows：

It is well placed Spiral digging machine and adjusts drilling tool, make stake position center line and drilling tool midpoint and the control inside Spiral digging machine operating room Coordinate cross point in instrument disk overlaps, and drilling tool is slowly put in pile foundation original top surface and drills.

Data is surveyed in base area in boring procedure and reinforced concrete structures select corresponding drilling tool.It is specific as follows：

If rock stratum within 30MPa, selects common self-control core drill peace ground auger to be combined；If 30-70MPa is selected It selects special core drill and pointed drill is combined.

If during armored concrete pore-forming according to the thickness of concrete and designing pile length and the different drilling machine model of selection and Special drilling rod is configured.Within 30MPa, reinforcing bar exists the intensity of concreteWithin using self-control core drill peace ground auger be It can.As concrete strength is combined more than 30MPa using special core drill and tipped drill.

If meet top-most-surface plane reinforcing bar carries out cutting reinforced mesh using self-control drilling tool, reinforced mesh is after cutting finishes Slag is drilled out using level land.If reinforcement in concrete appears in different section and the unknown situation of diameter is first using self-control coring Rotation, cutting reinforced concrete structures are bored, then are slagged tap with special tipped drill.

If get into concrete bottom reinforcing bar stratum reticulare with basement rock contact surface, manipulator should control biasing strength, generally Being pressurized to 11-26Mpa is advisable, at a slow speed to reinforced mesh, concrete, basal surfaces are rotated, are cut, pore-forming.

In reinforced concrete structure during pore-forming, suitable clear water is added in, reduces the concrete bisque generated during drilling, drop The temperature of low drilling tool.

Instrument inside operating room need to be kept a close eye on by entering when armored concrete bottom surface 50cm is contacted with rock top surface in drilling Biasing strength in device drilling depth data and instrumentation table, the model of the continuous type and blade for adjusting drill bit.

During drilling meet vertical reinforcement using self-control core drill, changed when being drilled into 50cm self-control tipped drill carry out cutting of steel flaccidity of tendon and muscle to It slags tap.

It should be first using homemade core drill and self-control level land when reinforced concrete structures and basement rock drill into underwater Brill, which is combined drill, slags tap.

The wear condition of drilling tool is checked in boring procedure at any time, replaces the blade of drilling tool in time to ensure the dimensioning in aperture It is very little, manipulator's coordinate value on visualizer dial plate at any time, to ensure the verticality in aperture.As found there is the phenomenon that inclined hole, shrinkage cavity In time using the geometric dimension of self-control core drill correction hole.

4.2.4 stake borehole cleaning

After stake pore-creating, the loose slag of hole wall surrounding is first cleared up, then in cleaning pile bottom sediment, pile bottom sediment cannot surpass Go out design requirement, indices meet job specfication requirement.

4.2.5 stake pore-forming is checked and accepted

First the plan-position of stake and pile foundation crest level are detected with total powerstation.A 6m-12m long is made again, and diameter, which is less than, to be set It counts the reinforcing bar within stake diameter 2cm and visits cage, reinforcing bar is visited cage and be slowly put into a bottom surface from stake top face, was put by practical hanging device Visiting cage steel cable in journey must be placed in the middle.If passing through the diameter of stake, meet design requirement.Using with the complete of non-prism function It stands instrument, alignment visits cage steel cable and calculates coordinate value per next meter, and whether result of calculation meets design requirement.

4.2.6 the construction in reinforcing bar room

The position in steel bar meter room is determined according to construction site, carries out levelling of the land first, with one reinforcing bar of section steel manufacture Cage platform.Operating platform should be enough rigidity and stability, and be maintained on a horizontal position, surface smoothness should meet The job specfication requirement of construction screwing steel bars cage.Raw material of reinforcement rebar and detection pipe should be placed in the warehouse of movable steel construction.Steel Muscle and detection pipe should be placed on the platform of more than 30cm from the ground, and reinforcing bar is avoided to aoxidize.

4.2.7 the making and installation of steel reinforcement cage and detection pipe

Laboratory should first detect whether raw material meet design requirement when reinforcing bar and detection pipe enter storehouse.It in next step need to be into The detection of row connector and welding rod, in the making for carrying out steel reinforcement cage after passed examination.Steel reinforcement cage should be made on dedicated platform Make, after making, transported steel reinforcement cage by required stake position using trailer.

The production process of steel reinforcement cage

First qualified raw material according to drawing cut-tapping welding)-assembling steel reinforcement cage-assembling detection pipe- Produce examination

The installation procedure of steel reinforcement cage

The qualified steel reinforcement cage scene of transporting-being well placed hanging device-lifting steel reinforcement cage-is slowly put into hole- Check point position-fixed steel bars cage

Hoisting process points for attention

It should select the hanging device with size hook during lifting, be equipped with professional commander, when lifting, should first use hook, Method that is parallel that steel reinforcement cage is transferred to aperture optimum position from trailer, being then combined using size hook.

Steel reinforcement cage has first been fallen from the ground 1.5 or so using small hook level during lifting, size hook is being used to start simultaneously, is being made Steel reinforcement cage becomes 60 degree of an angle of inclination arrival and unclamps small hook slowly above, and starting hook makes steel reinforcement cage perpendicular to ground, rotation Turn large arm alignment pile foundation, be slowly put into hole, steel reinforcement cage is remained in hoisting process apart from ground 50cm-150cm.

It can be locally deformed in this way to avoid steel reinforcement cage with ground, ensure that the lifting quality of steel reinforcement cage, steel reinforcement cage is hung During filling large arm rotation, the position for the 1.5m-2m that should come up at steel reinforcement cage bottom is 1-2 root cable wind ropes by ground handling operator Fixed cable wind rope, being rotated with large arm slowly.This ensure that steel reinforcement cage nonvoluntary swing during rotation, also improves People during lifting, the safety coefficient of machine.

When steel reinforcement cage is put into bottom, the method for being suspended vacantly steel reinforcement cage should be used.Flying height should be with pile foundation bottom apart 3-5cm, this avoid the torsional deformations caused by the weight of steel reinforcement cage itself, ensure that the verticality of steel reinforcement cage, ensure that Bottom reinforcement bars are not given birth to stake base rock and are in direct contact, and pile foundation bottom forms a concrete cover.It, should after steel reinforcement cage fixes Clear water is filled in type ultrasonic testing tube, it is suitable for reading then to have closed detection pipe, in this way can be to avoid detection pipe during concreting Connector part spillage causes detection blockage.

When steel reinforcement cage is put into hole, check that whether Reinforced Hoop is welded with main reinforcement secured, such as finds defect timely processing.

It should detect whether pile bottom sediment meets design and construction requirement before reinforcement cage hoisting.As sediment exceeds design and construction Specification should use bottoming drill borehole cleaning in time, until reaching design and construction code requirement, just carry out the lifting of steel reinforcement cage.

4.2.8 the installation of conduit and hopper

Conduit uses the seamless steel pipe of diameter 300mm, and standard knot is 3m long, and connector is connected for silk mouth, and installs sealing Circle.Enclosed experiment should be first done before the main dress of conduit, by the way of air pressure or pouring water, enclosed experiment conduit should be greater than for enclosed experiment Stake is long by more than 30%.If the connector and conduit of conduit, which lead body, occurs leak, answer timely processing or change.

Hopper selects coagulation unit weight of soil according to the size of stake diameter, and the first bucket coagulation unit weight of soil should meet underwater concrete Job specfication requirement, the ball valve of hopper should meet job specfication requirement.Hopper is installed using steel cable, and a section is answered when installing conduit One section connection installation, the bottom of conduit should meet job specfication requirement with the distance of pile foundation bottom.The depth of water should meet under water in hole Concreting requirement.

4.2.9 pile foundation underwater concreting

Concrete stirring is transported using system mixing building mixing, transport using the tank car of 9-12m3, pile foundation underwater concrete It is as follows to pour main points：

It is designed before concreting according to underwater concrete

The ground material of mix proportion selection qualification, the selection of additive are mixed to adjust according to local weather conditions and transportation range Early strong and Slow setting time, the selection of main material cement of solidifying soil additive should meet the requirement of underwater concrete.

Concrete answers the moisture content height of base area material to adjust the slump of concrete in mix.

The concrete transportation time cannot exceed the Slow setting time of concrete, and concrete, which reaches construction site, must do slump Experiment, if slump does not meet underwater concrete requirement, concrete cannot put in storage, and should return to mixing station.Such as concrete Workability it is poor, pouring for concrete can not be carried out.

It answers whether detection of pier foundation bottom sediment meets job specfication design requirement before concrete warehousing, exceeds as sediment is blocked up Job specfication design requirement should withdraw from hopper and conduit carries out pile bottom sediment cleaning.Using flat less than steel reinforcement cage diameter during cleaning Subdrilling carries out sediment cleaning.

During casting concrete, side's amount of first time bottom concrete should meet the requirement of underwater concreting job specfication.

First time bottom concrete should be carried out after pouring pour drilling depth record and pipe laying depth, pipe laying depth should meet under water Concrete construction code requirement.

During pile foundation concreting, concrete penetration rate and pipe laying depth should be removed at any time, to removing Guan Shibi Conduit must be withdrawn from time.

During pile foundation concreting per pile answer it is continual pour, broken pile can be avoided the occurrence of in this way, cold construction joint Phenomenon.

Concreting should exceed design altitude 50cm-80cm, and the drainage sunk well in hole is should be noted that when pouring.

4.2.10 ultrasound examination or core boring sampling

Intensity reaches more than 90% after concreting, carries out ultrasound examination or core boring sampling, should before ultrasound examination Check whether water fills in ultrasonic wave duct, and with the shot less than ultrasonic wave bore, whether the ultrasonic wave duct of test is unimpeded, uses lining rope Whether measure in ultrasonic wave duct has sediment.

Core boring sampling carries out random sampling according to design requirement and carries out sampling record and inspection report.Ultrasound examination and brill Core sampling reaches design requirement, could carry out the work of next step.

4.2.11 clear up stake top concrete

Should meet design altitude when clearing up stake top concrete depth, if cleaning when reaching design altitude, concrete if any The uncompacted phenomenon of slag inclusion should be cleared up downwards until meeting Concrete Design requirement.Anchoring should be protected when clearing up pile crown Reinforcing bar and built-in fitting cut off the detection pipe more than top of concrete, close and detect nozzle, in order to preferably protect built-in fitting And anchor bar.Cover to reinforcement concrete first is divested with pneumatic pick, any excess concrete is being cut off with special stripping stake tool.

4.2.12 completion is cleared out a gathering place

After pile foundation indices acceptance(check), into the next step, such as site clearing is carried out without the next step.

Claims (6)

1. a kind of detection method of pile quality in reinforced concrete structure or hard whole basement rock, it is characterised in that：Described Detection method includes stake holes (1) diameter, the detection of verticality and the detection of the concrete-pile pouring quality after the completion of pouring,

Wherein, when being detected to the diameter of stake holes, verticality, cage (2) is visited using reinforcing bar and is equipped with the complete of prism function Instrument of standing is detected；When being detected to the concrete-pile pouring quality after the completion of pouring, using ultrasonic wave or core boring sampling Mode is detected.

2. the detection method of pile quality in reinforced concrete structure according to claim 1 or hard whole basement rock, It is characterized in that：Total powerstation progress stake holes (1) diameter, measuring for verticality with prism function are equipped with visiting cage (2) using reinforcing bar When, it is to carry out in the steps below,

First the plan-position of stake and pile foundation crest level are detected with total powerstation；A 6m-12m long is made again, diameter is less than design stake Reinforcing bar within diameter 2cm visits cage (2), visits cage (2) by the reinforcing bar and the straight of stake holes (1) is detected during stake holes (1) is put into Diameter and verticality.

3. the detection method of pile quality in reinforced concrete structure according to claim 2 or hard whole basement rock, It is characterized in that：When visiting cage (2) detection stake holes (1) diameter by the reinforcing bar, reinforcing bar is visited using hanging device by cage (2) and is delayed Slow slave stake holes (1) top surface is put into stake holes (1) bottom surface, and the steel cable for visiting cage (2) during being put into for lifting by crane reinforcing bar must be placed in the middle, If passed through, the diameter of stake holes meets design requirement；

At the same time, using the total powerstation with prism function, the steel cable that alignment lifting reinforcing bar visits cage (2) is calculated per next meter Coordinate value, and determine whether the verticality of stake holes (1) meets design requirement according to result of calculation.

4. the detection method of pile quality in reinforced concrete structure according to claim 1 or hard whole basement rock, It is characterized in that：After intensity reaches more than 90% after concreting, then by the way of ultrasound examination or core boring sampling into The detection of row concrete-pile pouring quality.

5. the detection method of pile quality in reinforced concrete structure according to claim 4 or hard whole basement rock, It is characterized in that：Before ultrasound examination is carried out, first check whether the water in the type ultrasonic testing tube (3) of pre-plugged fills, so It is whether unimpeded with the shot survey type ultrasonic testing tube (3) less than type ultrasonic testing tube (3) internal diameter afterwards, it measures ultrasonic wave with lining rope and examines Whether there is sediment in test tube (3), detect the pouring quality of concrete-pile after qualification to be checked with ultrasound measuring instrument again.

6. the detection method of pile quality in reinforced concrete structure according to claim 4 or 5 or hard whole basement rock, It is characterized in that：The type ultrasonic testing tube (3) is installed to the corresponding positions of the steel reinforcement cage (4) in the manufacturing process of steel reinforcement cage It puts, and two ends of closing before being lifted into stake holes (1) with steel reinforcement cage (4),

Wherein, seal operation is completed in the lower end of the type ultrasonic testing tube (3) before lifting enters stake holes (1), and upper end exists Work is closed in completion after water is filled before concreting.