【Construction Case】HDL-200C top drive drilling rig for water stopper curtain of overseas dam

Construction technology      Construction technology of concrete anchor rod for dam water stop curtain cover   1.Construction preparation: the stratum is volcanic debris rock, the drilling rig uses HDL-200C top drive drilling rig, and the water pump sends water to discharge slag.   2.Measurement and layout: determine the hole position according to the design coordinates and report to the supervisor for verification and confirmation.   3.Drilling: align the drilling machine with the hole position, adjust the mast vertically, connect the 73 impact drill rod 102 impact drill bit, open the top impact water discharge drilling machine, drill to the hole depth and clear the hole, then pull out the drill rod.   4.Installation of anchor rods: use the hoist crane of the drilling machine to lift the anchor rods made into the hole, exposing 0.35m, and pour cement mortar.       Customer feedback    The customer thinks The drilling rig layout is reasonable The piping is neat The hydraulic system is simple and clear The strength of each action cylinder is sufficient   Construction efficiency is visible      Stratigraphic conditions      Drill rig configuration: 73 impact drill pipe and 102 impact drill bit Process type: water stop curtain borehole construction Stratigraphic conditions: moderately weathered rock Construction Angle (°): 90 Aperture (mm): 105 Hole depth (m): 9  

05-20-2025

【Construction case】SJ-25A rotary injection water stop construction

Stratum situation     Drilling rig model: SJ-25A Drill configuration: 60 double spin drill rod Process type: rotary spray water stop Construction technology: double rotary spray Construction Angle (°): 90 Pore size (mm): 500 Hole depth (m): 12 Construction efficiency (min): 60 Pure drilling time (min): 20 Pure removal removal drill time (min): 15   Construction technology   Construction configuration   One SJ-25A drill and one 90 high pressure pump Work progress   1、Site leveling, laying steel plate to ensure the smooth and reliable working face of the drilling rig, and determine the position of each pile according to the requirements.   2、Lift the drilling rig to the pile position, adjust the flatness of the drill bit to the center of the pile position, and position the bottom roller drum.   3、Install the drill pipe and drill bit, start the high pressure pump, pressure 10 mpa, direct drilling construction. When it reaches 6 meters, the pressure increases to 24 MPa and drills to 12 meters deep.   4、Control the footage speed, about 300mm per minute, and the following hard layer control at about 100mm per minut.   5、Adjust the high pressure pump pressure to 30 mpa, the lifting speed is 10cm / minute, the rotation speed is 10 rpm / minute, slowly spray to the specified position depth of the hole, and then remove the drill pipe.   6、Clean the drill pipe and drill and move the machine to the next hole.   —— Anman drilling rig sales service: Wang Bing  

07-09-2024

【Construction case】SJL-120 rotary jet drilling rig was constructed in MJS

Stratum situation   Location (province): Zhejiang Province Location (city): Hangzhou Drill model: SJL-120 rotary jet drill Process type: rotary spray reinforcement Construction technology: MJS construction method Stratigraphy: 1-3 meters backfill, 3-25 rice flour sand layer contains a small amount of mud Construction Angle (°): 90 Pile diameter (mm): 2,400 Hole depth (m): 19     Construction technology   Configuration:   ① A hole introduction drill, with 89 drill rod + 250-300 three-wing drill bit; ② A SJL-120 rotary jet drill, equipped with 142 porous drill + 142 porous drill rod + porous shunt + 25 diameter 6-layer high pressure pipe + 19 diameter 4-layer high pressure pipe; ③ One 230 high pressure grouting pump, two 90E high pressure grouting pumps (one pre-cut water and one reverse slurry water); ④ A 10 kg 12 cubic air compressor, pressure to ensure 0.8~1.0Mpa; ⑤ A car crane; ⑥ A return mud pump; ⑦ A fully automatic mixing station; ⑧ A set of cement tanks.     1、According to the requirements to determine the pile position, first with the hole drill, due to the characteristics of silt formation-cohesion is very small, easy to lead to hole collapse, it is recommended to use bentonite wall when the hole;   2、After drawing the hole, remove the hole drill, level the site to ensure the stability of the MJS rig (the steel plate should be laid when the site conditions are not met), align the drill at the center of the pile according to the requirements, and adjust the level with the support leg;     3、The crane lifts the drill bit and holds the power head, and seals the nozzle and suction nozzle with tape (prevent the nozzle and suction nozzle from being blocked during the drilling process. The tape is recommended to use the easy to break type), and then connect the drill rod in turn (pay attention to each joint sealing ring and sensor wire joint when connecting the drill rod), install the shunt after the required depth, and then connect the slurry pipe, gas pipe and water pipe to the shunt;     4、Open the background air compressor and high pressure pump grouting pump (230 high pressure grouting pump will pre-cut the bottom of the pile with clean water first, and change to cement slurry after 5 minutes) Pulp pressure is 40 mpa, pre-cut water pressure is 25~30 mpa, pressure is 0.9~1.0 mpa, reverse slurry water pressure is 10~15 mpa, rotary speed is 3 r/min, and lifting speed is 2.5cm / min During construction, pay attention to the change of rotary pressure and ground pressure ① to prevent drilling; ② bad reverse slurry and high ground pressure will lead to formation disturbance; good reverse slurry and low ground pressure will lead to hole collapse drilling The normal situation is: the hole has pulp and not excessive                   —— Anman Drilling Rig sales service: Lu Xinke      

04-19-2024