本工程止水帷幕密封墙采用双轴粘土搅拌桩工艺。①定位 平整施工场地后，按

The water-proof curtain sealing wall of this project adopts biaxial clay mixing pile technology. <br>① positioning <br>formation after the construction site, determined according to the pile pile floorplan. Move the mixer to the designed pile position, <br>position and align , the stake error of the pile position is less than 50mm, and the allowable deviation of the verticality of the mixing shaft (per meter) does not exceed 15mm. <br>② Construction sequence <br>The long axis direction of the two axes of the clay mixing pile is perpendicular to the direction of the sealing wall, and the clay mixing pile is constructed sequentially from one end to the other end. <br>③ pulp <br>mud pit boundary region disposed reinforcement using mechanical excavation, a plastic film covered with geotextile bottom. <br>The permeability coefficient of the clay curtain wall is less than 5 * 10-6cm / s, and the mud mixing ratio is based on the indoor mixing ratio test, and the unit mixing index is 30%. <br>After completion, the mud pool is treated and filled with medium coarse sand, and all the mud in the pool is transported to the sealed trench. <br>④ stirred sink spraying <br>the starter motor and a mortar pump, so that along a stirrer <br>while stirring the guide frame setsudo good mixing and mud will sink into the ground, the spray while rotating, to ensure stirring and spray speed of sinking Simultaneously, the sinking speed is not greater than 1.2m / min. The mixing depth is generally 10 ~ 20cm deeper than the design depth. When stirring to the end of the pile, it should sit at the bottom for more than 30 seconds to ensure that the slurry reaches the end of the pile. Drilling grouting volume is about 50 ~ 60%. <br>⑤ Stirring and rising <br>When the stirring head sinks to the design depth and sits on the bottom for more than 30 seconds, it starts to lift, spraying the slurry while rotating, the lifting speed is not more than 0.8m / min. When the mixing head is raised to 1m from the top of the pile, it should be decelerated. When the spraying hole is exposed to the ground, the lifting should be stopped, and the mixing should be performed for a few seconds to ensure that the pile head is even and dense. Increase the grouting volume by about 20 ~ 30%. <br>(6) The <br>submerged grouting and subsidence are basically the same as the four steps, the difference is that the amount of drilling grouting is about 10 ~ 20%. <br>(7) Stir up again<br>It is basically the same as the 5 steps, the difference is to increase the grouting volume by 10 ~ 15% per month. <br>(8). Shift: The <br>mixer is shifted, and repeat steps 3, 4, 5, 6, and 7.

The sealing wall of the water-stopping curtain of this project adopts the two-axis clay mixing pile process.<br>(1) Positioning <br>After leveling the construction site, the pile position is determined according to the pile layout plan. Move the blender to the design pile,<br>In the alignment, the pile loft ingress splendor error is less than 50mm, and the verticality of the mixing shaft (per meter) allows a deviation of no more than 15mm.<br>(2) Construction order<br>The long axis direction of the double axis of the clay mixing pile is perpendicular to the direction of the sealing wall, and the clay mixing pile is constructed continuously from one end to the other.<br>(3) Pulp <br>The mud pool is set at the boundary of the reinforced area, with mechanical excavation and plastic film and earthen cloth on the bottom.<br>The penetration coefficient of the clay curtain wall is less than 5 x 10-6cm/s, and the mud doping ratio is based on the indoor fit ratio test, and the unit doping index is 30%.<br>After completion, the mud pool is processed, filled with medium coarse sand, and all the mud in the pool is transported to the sealed ditch.<br>(4) Stirring spray to sink <br>Start the motor and mortar pump so that the blender is along<br>The guide frame stirs the cut soil to sink while pressing the mixed mud into the foundation, rotating the side spray, to ensure that the stirring and sinking and the spray speed is synchronized, the sinking speed is not greater than 1.2m/min. Stirring depth is generally more than the design depth of 10 to 20 cm, when stirring to the end of the pile, should sit at the bottom for more than 30 seconds, to ensure that the slurry is completely to the end of the pile. Drilling into the pulp amount of about 50 to 60%.<br>(5) Stirring up<br>When the mixing head sinks to the design depth and sits at the bottom for more than 30 seconds, start lifting, spinning the side to spray the slurry at no greater than 0.8m/min. When the mixing head is raised to 1m from the top of the pile, it should be slowed down, and when the spray outlet is exposed to the ground, the lift should be stopped and the stirring should be stirred for a few seconds to ensure that the pile head is evenly compact. The amount of raised slurry is about 20 to 30%.<br>6, stir the spray to sink again<br>The difference is essentially the same as the 4 steps, the difference is that the amount of drilling slurry is about 10 to 20%.<br>7, stir again to rise<br>The difference is to increase the amount of pulp 10 to 15% monthly, which is basically the same as the 5 steps.<br>(8), shift:<br>Shift the blender and repeat the 3, 4, 5, 6, 7 steps.

The sealing wall of the water stop curtain of the project adopts the technology of biaxial clay mixing pile.<br>Location<br>After the construction site is leveled, the pile position shall be determined according to the plan layout of pile position. Move the mixer to the design pile position,<br>For positioning and alignment, the setting out error of pile position is less than 50 mm, and the allowable deviation of verticality of mixing shaft (per meter) is not more than 15 mm.<br>② Construction sequence<br>The long axis of the double axis of the clay mixing pile is perpendicular to the direction of the sealing wall, and the continuous construction from one end to the other is adopted for the clay mixing pile.<br>3. Pulping<br>The mud pit is set at the boundary of the reinforcement area, which is excavated mechanically, and the bottom is paved with plastic film and geotextile.<br>The permeability coefficient of clay curtain wall is less than 5 * 10-6cm / s. according to the indoor mix proportion test, the unit mixing index is 30%.<br>After completion, the mud pit shall be treated and filled with medium coarse sand, and all mud in the pit shall be transported to the sealing ditch.<br>④ Mixing and shotcreting sinking<br>Start the motor and mortar pump to make the mixer<br>When the guide frame is agitated and cut into soil and sinks, the mixed mud shall be pressed into the foundation, and the mud shall be sprayed while rotating to ensure that the mixing sinking and spraying speed are synchronous, and the sinking speed shall not be greater than 1.2m/min. Generally, the mixing depth is 10-20cm deeper than the design depth. When mixing to the pile end, the bottom shall be set for more than 30 seconds to ensure that the slurry completely reaches the pile end. The amount of drilling grouting is about 50-60%.<br>⑤ Agitation rise<br>When the mixing head sinks to the design depth and sits at the bottom for more than 30 seconds, it starts to lift and spray while rotating, with the lifting speed no more than 0.8m/min. When the mixing head is lifted to 1m from the pile top, it shall be slowed down. When the shotcrete mouth is exposed to the ground, the lifting shall be stopped and the mixing shall be carried out for several seconds to ensure that the pile head is uniform and dense. The grouting amount is about 20-30%.<br>(6) . mixing and shotcreting again to sink<br>The difference is that the amount of grouting is about 10-20%.<br>(7) . stir again to rise<br>The difference is that the grouting volume is increased by 10-15% per month.<br>(8) , shift:<br>Shift the mixer and repeat steps 3, 4, 5, 6 and 7.