The reason: lack of early irrigation reserves concrete, concrete reserves have been enough, but the end of the catheter away from the mouth of the hole bottom spacing is too large, can not be buried under the concrete behind the mouth end of the catheter, so that the mud from the bottom into the mouth; conduit fitting lax joints between rubber pad by high-pressure balloon catheter squeeze, or weld cracking, water flows from the joints or welds; catheter excessive lifting, or sounding wrong, the bottom port catheter beyond the original concrete surface, a bottom opening into the mud. 2. Prevention and Treatment: If the first one due to the above reasons, you should immediately put the catheter will be scattered in the bottom of the hole with concrete mixture reverse circulation drill rig is pumped out through the debris, or air suction machine hydraulic suction machine and grab cleared seriously should be taken to re-drill steel cage made clear, re-delegated skeleton, catheter and put sufficient reserves of the first concrete refilled. If the second, three causes, as the case may be, to pull the original pipe weight change under the new pipe; or original catheterization continued irrigation, but before the infusion should be within the catheter into the water and sediment and soil with Suction pumping method sucked out. To re-new pipe, submersible pumps must be drained of water inside the tube, in order to continue pouring of concrete. To prevent the pumping of mud outside the catheter through the original irrigation concrete plunged from the mouth end of the catheter, catheter insertion should have enough depth within the concrete, generally should be greater than 200 cm. Because of submersible pumps can not be drained of all water conduit, continued irrigation concrete mix should increase the amount of cement to improve consistency after poured into the catheter, the catheter before poured into small amplitude jitter or be hung vibrators vibrating moment so that the original concrete to make up the loss of mobility. After the return to normal perfusion concrete mix. If the concrete surface in the water, when not in the initial setting, you can set the waterproof plug at the bottom of the catheter, the catheter re-inserted into the concrete (catheter side plus gravity to overcome the buoyancy of water). After the concrete is slightly built irrigation catheter mention catheter, using new concrete weight will press out the bottom plug, then continue perfusion. If the concrete surface in the water, has been the initial setting, the catheter can not be re-inserted into the concrete, can be additional smaller diameter steel casing in the original protective tube surface, hammering method using weight or pressed into the original concrete surface following the proper depth, then The guard barrel pumping grout, and sludge and weak top surface layer of the original concrete cleaned, and then in ordinary concrete to protect the barrel perfusion pile design.