Current, CFG picket had received wide application in building a project, but there still are a few problems in the construction process in CFG picket, if undertake not easily be controllinged strictly to the dosage of concrete, the position that becomes stake not essence of life is accurate, because often jump,make the case of picket of construction occurrence leakage, often the phenomenon of carry secretly clay, and the circumstance that cannot achieve construction blueprint result, the occurrence metropolis of these circumstances more or less influence construction effect.
One, CFG is building the value in the projectCFG picket is compound foundation technology is law of labor of class of a kind of state, it applies labour civilian extensively to construct a field at present, if the building of industrial workshop and large high level are built, CFG picket gained very good economic society benefit in the application in building a project. CFG picket has following advantages in project:
The first, make building construction more convenient;
The 2nd, building construction quality is easier accuse, can improve project quality;
The 3rd, the deepness that builds consolidate is bigger, can build the extent that foundation sinks at the same time, increase foundation very well bearing ability.
These advantages are in above current structure got be reflectinged extensively in construction. Accordingly, CFG is very important one part in construction project.
2, the meaning of CFG picketCFG picket is the abbreviate of English Cement Fly-ash Gravel, the meaning that word of these 3 English represents is cement, fly ash and clastic rock. CFG picket technology was to use fly ash adequately the cement that flotsam of this one industry replaced one share, can reduce project cost greatly thereby, can strengthen picket itself again at the same time bearing ability, improved the quality of construction project.
In construction of the earth between picket
In the applied technology of CFG compound picket, pass a setting flexible mattress layer, can let Rangdejide arrive to sedimentation equably, and raise stake bearing strength, application is special economy on foundation of consolidate soft earth practical new-style fill holds post. The property of CFG compound picket is the picket of property of high strenth, tall felt, it and common mixture picket technology are put in substaintial distinction, basically be picket body used data is different, but in be out of shape the feature is mixed distinguish without what on degree getting power, at the same time CFG compound picket is designing method and groundwork nature to go up to also do not have substaintial distinction with other compound stake. That is to say CFG picket applies to balsa radical, independent base likewise, form foundation and box form foundation. CFG picket has very good earth sex as much, it applies to filling, saturation and blame saturation agglutinant earth, apply to the land with crowded close good result not only, apply to the soil with crowded close bad result as much.
3, CFG picket controls a point in the quality in construction process1, should have strict control to slump of spot CFG compound
It is in CFG picket in construction process, want to have strict control to slump of spot CFG compound, hold the measure of slump of good CFG compound. If the slump of CFG compound appears,cross big phenomenon, with respect to the appearance that can create compound occurrence separation, cause concrete to carry the phenomenon of occurrence depart of the aggregate inside conduit and oar body at the same time, because attrition force crosses the phenomenon that large generation conduit jams,can cause below the severe case of this kind of phenomenon, still can let picket carry generation float oar on the head at the same time, the intensity of body letting picket drops somewhat. If the slump of CFG compound appears,cross small phenomenon, because the compound fluidity of concrete is too small,also meet, produce the phenomenon that conduit jams likewise.
2, the examination that notices borer equipment in the construction site of CFG picket works
Facilities of special and easy occurrence artesian well gives the case that shows a state in the construction process that having CFG stake, before this is undertaking with respect to need the construction of CFG picket works, to artesian well equipment undertakes perfect overhaul, have facility in time maintain the job.
In construction of long helix borer
If appear,get frame frame-up or phenomenon of drill pipe bent appears easily of picket aperture deflective, if appear,at the same time abnormal drill pipe curvature can cause the compound inside the canal to undertake jamming. Accordingly, want to making want to have seasonable examination to borer equipment before construction go into operation, once discover the problem undertakes the overhaul in time, lest be in,breakdown appears in construction process, affect construction plan, when be being maintained to cannot having a part, want pair of seasonable spare partses to undertake changing. If produce borer exhaust valve jam phenomenon, can produce the air inside conduit cannot seasonable eduction, make gas exists inside the body of CFG picket cannot eduction, create the appearance of empty core, affect CFG picket greatly bearing ability, this undertakes to exhaust valve with respect to need seasonable dredge is mixed regularly clear the job. If appear,the drill pipe of CFG picket cannot have the case that gets, need undertakes checking to the power of borer, because different borer power needs to satisfy different earth,layer getting presents a demand, if appear in the course that gets to encounter fraise, need is right already bore undertakes fill expects, choose picket afresh again next undertake filling accordingly getting, appear possibly otherwise new drill collapse toward useless aperture direction aperture, perhaps make system of land of body of filling stake stake disturbs frictional resistance force is abate.
3, operation problem is paid attention to in the construction site of CFG picket
Because unplug tubal speed is controlled not accurate, unplug tubal rate may bring about picket diameter too quickly to slant small or shrink the neck snaps stake, and unplug tubal rate can cause grout too slow to distributing again not divide evenly, oar of picket diameter float is overmuch, picket body strength is not worth and form compound separation phenomenon, bring about inadequacy of picket body strength. Read drill pipe footage to count by accident for instance as a result of other error at the same time, did not observe borer hangs down place bring about picket body to tilt etc. Because this strengthens pair of operations,groom before the hillock of personnel, what education and technical tell sb one's real intentions prepare to work as construction is important one annulus.
4, after picket radical construction ends snap stake, receive stake
Picket radical construction ends, when detecting to CFG picket and compound foundation, with low meet an emergency reflection wave law detects the integrality of picket body concrete, discover the location position of picket body break, should analyse a reason, reach oneself problem is to be when construction, because carry,get rate faster, air was not released entirely, cause picket body to produce section break, the agitate time that is compound additionally is insufficient, workability is poor, picket of face of occurrence beehive hemp. Exterior reason is the machinery when earth builds construction is dug base when cubic meter of earth of hole level off, be touched by grab and forklift.
The solution is: Shallow ministry snaps stake, undertake handling alone to snapping stake, eliminate upside snaps stake, with as identical as picket body compound the diameter that press picket designs elevation filling picket. If be exterior reason earth,build an unit to use mechanical construction, cause large-scale shallow ministry to snap stake, answer to make plan jointly with design unit, inspect manage unit, construction unit.
Usually, detecting surely formerly on the foundation of plan, the choice breaks picket a few times to have single stake compound foundation dead load experiments, comparative integrality picket and result of the test that snap stake, break picket to whether can be used certainly, if decide compound foundation bears the weight of,force is mixed be out of shape can contented design asks, can not undertake handling, carry out experience to prove, when the action of load of before a few class that experiments in dead load, the deflection that snap stake slants big. Main reason is to rupture picket did not produce effect under the face, basically be the earth between picket is producing effect, the load that the place that snap stake shoulders is very small, but the load function with arrived particular is broken seam after closing, bottom picket body begins to produce effect. And in the design load falls, snap stake sedimentation as lesser as difference of in good condition picket. If do not accord with a requirement, need to undertake plan is proved designing. But man-hour is applied in CFG picket, want the construction quality of special attention shallow ministry, it is when excavate radical hole, place of elevation above 1m supports in picket, use artificial excavate certainly, lest touch picket body, assure the integrality of CFG picket and quality.
After picket head snaps stake, undertake receiving stake, when when picket very tall Cheng knows tall Cheng under construction icon, if open groove or eliminate picket head to must have filling stake, the pisolite concrete that can use higher than picket body strength first-class level receives picket to know picket to carry elevation on the head to construction icon, the practice sees a picture 1, the attention protects the land between good picket in the process that receive stake.
5, safe production has in the construction process of CFG picket
Above all, should be opposite regularly the construction personnel of CFG picket undertakes safety teachs the job, the security that enhances construction worker is on guard consciousness. When construction worker is having construction spot, must adorn safe protective equipment, and the artesian well of CFG picket is operated the job should hold card mount guard to undertake construction, the director that and should comply with leads undertakes construction works.
Next, in CFG picket base hole brim should use what steel tube makes to defend column, and suspension looks closely net, clear safe sign is installed in construction site, the construction personnel that prohibits having nothing to do enters the construction site of CFG picket.
Again, staff of forbidden blame work enters the construction site of CFG picket. Less than of limits of radius of big arm of machine of crane, picket undertakes in construction site, when machinery is working, construction personnel should is far from.
Finally, when the pump pressure compound of CFG picket due person specially assigned for a task conducts pump pressure operation, because of,prevent exhaust not free and operation error cause cartridge igniter, form harm.
4, brief summary
The construction craft of CFG picket is a kind of perfect with each passing day construction craft, the construction focal point with this construction the mainest craft is to undertake run the drilling tool into the well is mixed undertake unplugging tubal two shares program, meanwhile, still need to be aimed at different field condition, the program that different machine and different exercise face construction process to undertake unity and plan as a whole, such ability ensure the spot construction quality of CFG picket.
We are building the value in the project in analytic CFG, and on the meaning foundation of CFG picket, put forward CFG picket to control a point in the quality in construction process, specific include: The inspection job that should undertake to slump of spot CFG compound the strict control, construction site in CFG picket notices borer equipment, construction site in CFG picket pays attention to an operation problem, and safe production has in the construction process of CFG picket. Want science to raise CFG stake effectively quality of the construction in building a project, assure construction result!
