Long spiral bored disadvantage when transporting concrete pump concrete, because of its small size of the pressure control uneven Jet rigs, soil pressure uneven pile in the process, when the concrete pressure is greater than the soil pressure Jet rigs, pile was slightly increased diameter state, on the contrary may form a miniature diameter state. Also outside of the pile and the soil has interwoven phenomenon, so the cylinder which model is not a constant cross-section jet grouting rig manufacturers, which brought some trouble to pile testing. The traditional method of course can be measured static load bearing capacity, but because of static load for a long time, is expensive, it is not general use; when the integrity of dynamic testing since, due to the pile does not fully comply and so assumed cylinder section, small Strain instrument sometimes not a good reaction it is complete, and dynamic testing bearing capacity is also not well used in this pile. So in the dynamic testing, sometimes misjudge phenomenon. Therefore, in the long spiral bored pile construction, pay attention to the speed of delivery of concrete and auger rod to enhance the speed, making it more economical construction, testing more convenient. 1 rig safety procedures, to check whether the former drill rigs running well, depth and rock drilling must be clearly the case, you must check the next diamond drill wear, the drill pipe for blockages, if there is a knot drill injury. 2, drill, at least three people with one person operating the rig, plus one rod, one grasp opening, avoiding falling into holes drilled hole fast. To stop the drill rig overtime, the whole is hit from the stop position. Such as the use of ladders should be placed firmly Jet rig equipment sales, operating on a ladder, the ladder should be someone good help, or with wire tied to a ladder and other fasteners. 3. Check carefully before to drill oil rope hoist, include references, a damaged must be promptly replaced, to have the time to drill at least three people with one person operating the rig, a person in charge of unloading drill pipe, one of the opening, when the hole When drilling big top water situation appears to use the rig to drill vertical, the operator should attach serious, with slip control drill, impact drill to avoid or shed roof beams, construction workers are not allowed to face the opening, to prevent high pressure water drilling wounding top, you must use the time to drill pad fork. 4, to drill, winch operations must be stable, unloading lever must always pay attention to opening and hoist operation to prevent rejection rope squeeze hands hurt. 5, each class construction workers enter the workplace, we must always pay attention to the case of the engine room roof, shed beam supporting the case, according to the order has the inside out, have to strictly implement the "knock state asked top" system, there is danger of discovery rock live rock or roof separation, should be promptly removed with a long-handled tool when dealing with problems, there is a man at the side care, and to ensure the smooth flow of retreat, indeed endangering personal safety, they can withdraw immediately. 6, drilling and grouting parallel operation, they should be careful opening the pressure gauge and high pressure pipe to drill drill rig personnel, when grouting pressure reaches 4.0Mpa above or grouting pressure instability, non-parallel appeared in the room work to prevent accidents caused by mud spray people.