27results about How to "Improve pile quality" patented technology

The invention relates to the technical field of real-time prediction of three-dimensional forms, in particular to a real-time dynamic prediction system and method for the three-dimensional form of a high-pressure jet grouting pile. The method comprises the following steps: carrying out stratum characteristic identification on a construction site to obtain stratum distribution data; key monitoring point positions are determined according to the stratum distribution data, and a multi-source sensor monitoring network is established; carrying out anti-interference optimization processing on the multi-source sensor monitoring network, and carrying out real-time acquisition on high-pressure jet grouting parameters to obtain real-time high-pressure jet grouting data; and spatio-temporal evolution processing based on injection pressure, lifting speed and rotating speed is conducted on the real-time high-pressure jet grouting data, and parameter change characteristic data are generated. According to the method, the construction stratum distribution and the high-pressure jet grouting parameters are obtained and analyzed in real time, the parameter-stratum response relation model is established, grout diffusion and pile body forming dynamic prediction are conducted on different stratum characteristics in a targeted mode, and the precise construction capacity under the complex stratum condition is greatly improved.

The invention relates to the technical field of cast-in-place pile construction, in particular to a cast-in-place pile drilling device for a pump station and a construction technology, and the cast-in-place pile drilling device comprises a drilling mechanism, a slurry recycling mechanism, a supporting mechanism and a tamping mechanism. According to the device, when the sliding plate descends, the first one-way rotating plate is driven to descend together, clay between the sliding plate and the soil discharging shell can be scraped and pushed to the position below the drilling barrel through the first one-way rotating plate, when the clay is discharged into the bottom of a hole, external air can be discharged into the space between a drill bit and the bottom of the hole together, and therefore the negative pressure strength can be reduced; a sliding plate continues to press downwards, clay can be compacted layer by layer through a compacting plate, when the sliding plate ascends, blocking is conducted through a second one-way rotating plate, and therefore the situation that the soil is backfilled into a soil discharging shell can be prevented, clay backfilling and tamping can be conducted on the collapsed hole wall at the first time, the collapse area is prevented from being increased, and the construction efficiency is improved. Emergency treatment can be carried out when hole wall collapse and hole wall hole shrinkage occur through the tamping mechanism, and it is guaranteed that follow-up drilling construction is recovered as soon as possible.

The invention discloses a composite lubricating sleeve with a pile sinking soil plug reducing effect. The device comprises a flexible substrate and a microstructure anti-drag layer which are compounded together, the outer circumferential face of the flexible base is attached to the inner circumferential face, close to a pile shoe, of a prefabricated pipe pile, and solid lubricating particles are evenly mixed in the flexible base. The microstructure resistance reduction layer is composed of a plurality of micro convex points which are regularly distributed on the inner circumferential face of the flexible substrate in a dot matrix shape, and solid lubricating particles are packaged in the micro convex points. According to the method, the pile sinking construction difficulty and equipment requirements can be effectively reduced, pile body deviation and equipment energy consumption caused by too large resistance are reduced, and the construction cost is directly saved. The core innovation of the method lies in that the blocking forming process is actively intervened through a multiple cooperation mechanism of solid particle lubrication, micro-convex-point blocking and micro-rolling, the controllability of the pile sinking process and the perpendicularity of a pile body are greatly improved, and the pile sinking quality is improved from the source. The composite lubricating sleeve is unique in technical path, and the technical span from passive treatment to active prevention and control is achieved.

The application discloses a long spiral drilling machine concrete automatic pouring control method and system, the method comprises the following steps: in response to the pipeline filling rate and / or the concrete pressure reaching the preset value, the drill pipe automatic lifting mode is started; according to the feedforward speed and the feedback correction amount generated based on the concrete pressure deviation, the lifting speed is calculated, the winch equipment is controlled to lift the drill pipe according to the lifting speed, and the real-time correction of the lifting speed is carried out in the lifting process; the total lifting length is divided into multiple preset lengths, when the drill pipe is lifted by the preset length each time, the pile filling rate in the preset length range is calculated, if the pile filling rate is lower than the preset filling rate, the underfilling backfilling is carried out, after the backfilling is completed, the drill pipe returns to the original position and continues to lift until the concrete pouring is completed. The pouring process of the concrete is changed from the experience type manual adjustment to the closed loop control based on the pile filling rate and / or the concrete pressure, the underfilling and overfilling phenomena are avoided, and the piling quality is higher and more stable.

The invention belongs to the technical field of bridge pile foundation construction, and discloses an underwater cast-in-place pile pouring device and a using method thereof. The underwater cast-in-place pile pouring device comprises a bearing plate, a guide pipe and a hoisting piece. Wherein the number of the guide pipes is two. The two guide pipes are arranged on the bearing plate in a spaced mode in the horizontal direction, pouring channels used for pouring concrete are formed in the guide pipes and are arranged in a penetrating mode in the vertical direction, first cutting openings are formed in the positions, close to the bottom ends of the pouring channels, of the opposite sides of the two guide pipes, and second cutting openings are formed in the positions, close to the bottom ends of the pouring channels, of the two guide pipes. Second cutting openings are formed in the opposite sides of the two guide pipes, the pouring channel communicates with the outside through the first cutting openings and the second cutting openings, and the hoisting piece is arranged on the bearing plate. The underwater cast-in-place pile pouring device is used in the using method of the underwater cast-in-place pile pouring device. Through the arrangement, the underwater cast-in-place pile pouring device can improve the construction efficiency and the pile forming quality.

This invention discloses a construction device for cast-in-place piles in highway construction, belonging to the field of cast-in-place pile construction technology. It includes a main body mechanism for placing a reinforcing cage, with an insertion mechanism for inserting the cage into the ground and an adjustment mechanism for adjusting the construction height and angle. By incorporating an inner rotating frame, friction wheels, and clamping roller assembly within the main body mechanism, combined with the preload of the clamping springs, the invention can stably clamp the reinforcing cage onto the friction wheels. Driven by a rotating motor, it achieves a precise 90° rotation of the reinforcing cage from a horizontal to a vertical position. This process avoids the collision with the hole wall or skewing problems that may occur during manual hoisting and alignment, ensuring the accuracy of the vertical insertion of the reinforcing cage into the pile hole, thereby improving the quality of the pile.

This invention discloses an outward-extending anti-buoyancy anchor construction device and an expanded-diameter high-pressure jet grouting anti-buoyancy pile, relating to the foundation field. The aim is to increase the maximum tensile force that the anti-buoyancy anchor can withstand and improve the pile quality of the anti-buoyancy pile. The technical solution adopted is as follows: The outward-extending anti-buoyancy anchor construction device includes a pile head, a casing, and anti-buoyancy reinforcement. The pile head is threadedly connected to the casing, and the anti-buoyancy reinforcement is located inside the casing. The lower end of the anti-buoyancy reinforcement is connected to the pile head. A flip-and-embed component is fixed to the outer periphery of the anti-buoyancy reinforcement, and the flip-and-embed component includes a fixed reinforcement and a movable reinforcement. The expanded-diameter high-pressure jet grouting anti-buoyancy pile includes a grouting consolidation body inside the pile hole and a jet grouting consolidation body outside the pile hole. The jet grouting consolidation body is a consolidation body formed by high-pressure jet grouting to the pile hole wall. The grouting consolidation body and the jet grouting consolidation body are a single unit. The movable reinforcement can be flipped and extended to embed into the jet grouting consolidation body corresponding to the soft strata, increasing the pile diameter and bearing capacity of the anti-buoyancy pile. This invention is used for the construction of anti-buoyancy piles.

The present invention provides an underwater foundation of a building and a construction method and construction equipment thereof, belonging to the technical field of buildings. The underwater foundation of the building includes a plurality of rotary bored piles, a cap, a pier, a cap outer mold caisson and a pier outer mold caisson, the cap is fixedly connected to the top of the plurality of rotary bored piles; the pier is fixedly connected to the top of the cap, and the upper part extends above the water surface; the cap outer mold caisson is arranged outside the cap; the pier outer mold caisson is arranged outside the pier. The construction method is used for the construction of the underwater foundation of the above-mentioned building. The construction equipment includes a construction platform and a continuous concrete pouring device arranged on the construction platform. The present invention forms a cap and a pier through a cap outer mold caisson and a pier outer mold caisson, and connects a certain number of rotary bored piles through the cap, which is conducive to improving the quality of pile foundation construction and the safety of the building, and is particularly suitable for the construction of water buildings such as wind power projects, bridges or drilling platforms.

The invention discloses a cloth bag wrapping type cloth bag pile suitable for a karst area and a construction method, and relates to the technical field of karst area construction. The cloth bag does not need to be completely wrapped along the pile length, the cloth bag with the needed length is wrapped according to the specific position of the karst cave, and compared with a steel casing follow-up method, the material cost is low; compared with a backfilling method and a grouting method, the problems of slurry loss, pile body necking, diameter breaking and the like can be effectively solved, the construction cost is low, the pile forming quality is good, the cloth bag diameter redundancy is utilized, poured concrete slurry reaches the karst cave position to extrude the cloth bag to form a branch disc structure, the pile foundation bearing capacity can be improved, and the pile foundation construction period is shortened. And the safety of the pile foundation in the karst area is ensured.

This invention discloses a semi-precast component and pile-forming equipment for cast-in-place piles in the field of precast pile technology, aiming to solve the problem of groundwater erosion carrying away the concrete of cast-in-place piles in existing technologies. It includes: an airbag inflated to the designed dimensions and shape of the cast-in-place pile through a gas exchange port; concrete is poured into the inflated airbag through a filling inlet and vented through the gas exchange port; the airbag prevents the concrete from being washed away by groundwater in the pile hole, greatly improving the quality of the cast-in-place pile; a skeleton provides support for the deflated airbag, maintaining its low-resistance shape; the airbag's low-resistance shape facilitates placement into the pile hole; after inflation, the skeleton expands radially within the cast-in-place pile, providing tensile strength, reinforcement, and crack resistance; and mud can be poured into the filling inlet to protect the pile hole and prevent collapse.

The invention discloses an ultrahigh-pressure large-flow jet grouting pile construction method. The treatment method comprises the following steps that S1, construction preparation is conducted; s2, hole guiding; and S3, guniting. According to the method, on one hand, the pile position is determined through multi-line intersection, the perpendicularity is detected section by section while drilling is conducted so that the guide hole meeting the technical requirement can be accurately formed, a large-diameter and large-depth formed pile body can be achieved under the combination of ultrahigh-pressure water and ultrahigh-pressure mud, the pile forming quality is good, the seepage isolation and water stop effects are excellent, and the method is very suitable for construction under the water-rich sand layer condition; and on the other hand, hole guiding and pile forming speed is high, construction period is effectively shortened, and cost is saved.

The utility model discloses a concrete pipe pile center plugging structure which comprises a pipe pile body inserted in the ground, a bearing and positioning structure is arranged in the pipe pile body, a steel cage is inserted on the bearing and positioning structure, cement is poured between the steel cage and a pipe pile and located above the bearing and positioning structure, and the cement is filled with cement. The center plugging structure of the concrete pipe pile relates to the technical field of building construction, is reasonable in structure and convenient to install, can enable the air bag to expand through inflation to achieve interference fit with the inner wall of the pipe pile after the steel cage is inserted and positioned, effectively plugs a pile core channel, prevents materials such as cement paste from infiltrating, and improves the construction efficiency. The pile body compactness and the pile forming quality are improved; controllable inflation is achieved through the one-way valve and the air pipe system, construction operation and later adjustment are facilitated, good sealing performance, reliability and adaptability are achieved, the engineering construction efficiency and the quality control level are remarkably improved, and the problems of exposure and eccentricity of the reinforcement cage are solved through the positioning pin.

The application discloses a bored pile hole cleaning device and a construction method, and belongs to the field of foundation construction. The device comprises a mud pump, a cleaning pipeline connected with the mud pump, a connecting ring fixedly arranged on the cleaning pipeline, an installation ring fixedly connected to the connecting ring, a first rotating ring rotatably arranged on the connecting ring, a plurality of arc-shaped plates arranged on the first rotating ring, a driving assembly arranged on the first rotating ring and used for driving the arc-shaped plates to move, and a rotating assembly arranged in the installation ring and used for driving the first rotating ring to rotate. The application has the effect of improving the pile forming quality of the bored pile.

The present application relates to a kind of lime-soil compaction pile construction system for collapsible loess area, before construction, good technology, material, equipment and site preparation, such as familiar drawing, prepare soil and lime, debug hole and ramming equipment, level site and surveying and setting out etc..During construction, first carry out test pile to determine parameters, large-scale hole formation follows specific sequence and strictly controls pile diameter, perpendicularity etc.;Pile formation first clean bottom ram, then layered packing ramming, accurate operation by control system;After pile formation, do well maintenance.Quality detection uses low-strain dynamic penetration method to detect pile integrity, plate load test to detect composite foundation bearing capacity.The method is applied to a certain commercial complex project, construction is smooth, hole formation and pile formation quality meet the standards, efficiency is improved, construction period is shortened.

This utility model discloses a sealing device for precast pipe piles, including a sealing cover plate, a swing cover, and limiting components. The sealing cover plate is disposed on the top of the precast pipe pile; an opening is formed on the sealing cover plate. The swing cover includes a cover body and a rotating shaft; the outline of the cover body matches the opening; both ends of the rotating shaft are connected to the edge of the opening to straddle the opening. The swing cover rotates around the rotating shaft to close or open the opening. Limiting components are disposed on both sides of the rotating shaft to lock or unlock the rotation state of the swing cover. During construction, the closed swing cover dynamically seals the inner hole of the pipe pile, preventing soil and rocks from falling into the inner hole of the pipe pile; before core grouting, the limiting components can be released to open the swing cover, achieving non-destructive and rapid disassembly. The sealing device balances sealing reliability and construction convenience, and has the advantages of simple structure and high turnover efficiency.

This invention discloses a construction control method for large-diameter bored piles in hillside soil-rock mixture strata, including the construction of a data monitoring module, the deployment of an initial parameter module, the deployment of a real-time control module, preliminary control of the construction process, dynamic prediction of the construction process, dynamic control of the construction process, and continuous model optimization. The method involves real-time acquisition of drilling parameters, mud properties, vibration signals, and slurry return parameters; deployment of an initial parameter module to generate initial construction parameters based on geological feature vectors; deployment of a real-time control module employing a two-stage hybrid intelligent model architecture to sequentially perform real-time condition diagnosis and intelligent parameter control; implementation of a construction process encompassing preliminary control, dynamic prediction, and dynamic control; and finally, system self-learning through continuous model optimization. This method transforms the construction process from static experience-based dependence to dynamic intelligent control, effectively preventing problems such as borehole collapse and deviation, and significantly improving borehole quality, construction efficiency, and safety.

The invention relates to a cast-in-situ bored pile top elevation control device which comprises a control rod, a chassis, a guide pipe, a limiting assembly and a clamping assembly. The lower end of the control rod is connected with the base plate, the control rod is sleeved with the guide pipe in a sliding mode, the guide pipe is connected with the clamping assembly, and the clamping assembly is connected with the side wall of a steel casing. The limiting assembly is connected to the control rod and used for limiting the guide pipe. The limiting assembly comprises a positioning ring and an adjusting screw rod; the control rod is sleeved with the positioning ring, and the adjusting screw penetrates through the positioning ring to be connected with the side wall of the control rod. The clamping assembly comprises a fixing clamp and a fastening screw rod; one end of the fixing clamp is connected with the guide pipe, and the fastening screw is arranged on the side wall of the other end of the fixing clamp. According to the pile top elevation control device for the cast-in-situ bored pile, the existing defects are overcome, the pile foundation pile forming quality is guaranteed, and material waste is reduced.

The utility model relates to the technical field of offshore cofferdam steel sheet pile engineering, and discloses a guide device for improving the driving precision of an overwater steel sheet pile, which comprises two guide frames respectively positioned on two sides of the steel sheet pile, each guide frame comprises an upper guide beam, a lower guide beam and a plurality of guide piles, the upper guide beam and the lower guide beam are positioned on the same plane, and the guide piles are positioned on the upper guide beam and the lower guide beam. The surface of the upper guide beam and the surface of the lower guide beam are attached to the surface of the steel sheet pile, the guide piles are connected to the surface of the upper guide beam, and the lower guide beam is connected to the bottom of the upper guide beam. According to the guide device for improving the driving precision of the water steel sheet pile, the upper guide beam and the lower guide beam are arranged, double-layer constraint is conducted on the two sides of the steel sheet pile, the steel sheet pile is not prone to inclining in the sinking process, the perpendicularity and the inclination rate of driving of the steel sheet pile are guaranteed, then the pile sinking quality is improved, the overall sheet pile wall is neat, and the using amount of deviation rectifying piles is reduced.

The invention belongs to the technical field of composite piles, and discloses a prefabricated pile end long pile casing pulling and grouting composite pile which comprises a prefabricated pipe pile, and an expanding pile shoe used for reaming is arranged at the bottom end of the prefabricated pipe pile to form a main body structure of the composite pile; a grouting pipe is coaxially arranged in an inner cavity of the prefabricated pipe pile, the bottom end of the grouting pipe communicates with the expanding pile shoe, the top end of the grouting pipe extends out of the prefabricated pipe pile, and the grouting pipe grouts the space between the outside of the prefabricated pipe pile and the pile hole through the expanding pile shoe. And the prefabricated pipe pile is slidably sleeved with a pile end protection cylinder, the bottom end of the pile end protection cylinder abuts against the top end of the expanded pile shoe, the pile end protection cylinder is synchronously lifted up during grouting, and grouting is conducted on the space between the pile end protection cylinder and the expanded pile shoe. The device is simple in structure, the problem that in the pile foundation installation process, surrounding soil collapse holes block a grouting channel is solved through upward pulling of the long pile casing, the construction technology is simple, equipment can be repeatedly used, cost is saved, and the pile foundation pile forming quality is improved.

The utility model provides a cast-in-situ bored pile which comprises a bottom plate, a drilling assembly and a supporting assembly, a through groove is formed in the bottom plate, and a fixing column is fixedly connected to the top of the bottom plate; the drilling assembly is arranged on the inner side of the through groove and comprises a center rod, a spiral blade, a round hole and a linkage rod, the center rod is arranged on the inner side of the through groove, the spiral blade is fixedly connected to the outer side of the center rod, and the round hole is formed in the center rod. When the cast-in-situ bored pile is in a common stratum, the two plugs keep the state of blocking the two round holes all the time, when the cast-in-situ bored pile drills into a certain stable soil layer, pressure is applied to the linkage rod, so that the plugs leave the round holes, the linkage rod extends into the soil layer, drilling operation continues, a larger drilling space is formed, and the drilling efficiency is improved. And after concrete is poured, a larger spiral section space is formed, the pile forming quality of the cast-in-place pile is improved, and the drilling effect is improved.

The present invention discloses a multiple high-pressure adaptive micro-disturbance rotary jet drilling tool, which belongs to the technical field of rotary jet grouting. The multiple high-pressure adaptive micro-disturbance rotary jet drilling tool of the present invention includes a rotary jet diverter, a rotary jet drill rod, a vacuum suction device and a drill bit. It creatively adopts a multi-channel high-pressure rotary jet diverter, and cooperates with the rotary jet drill rod to realize high-pressure jetting at multiple levels, which increases the construction efficiency by many times and improves the pile quality; each level injection point is a high-pressure gas and high-pressure polymer dual-channel nozzle, which protects the high-pressure strength of the high-pressure polymer jet and cuts the soil more effectively. In addition, the vacuum suction device is creatively adopted, and no manual intervention is required during the entire rotary jetting process, which avoids quality problems caused by manual operation errors, and the construction operation is simpler and more convenient; at the same time, the wireless pressure sensor at the bottom can transmit the pressure in the underground hole to the mechanical equipment operating platform in real time, and can dynamically adjust the pressure in the hole; it no longer relies on imported MJS equipment, which greatly reduces the construction cost of micro-disturbance rotary jet grouting.

The invention provides a non-preloading sea silt geology prefabricated square pile composite deviation rectifying method. The method comprises the steps that (1) deviation is rectified by adopting a heaped loading method within the deviation range of 300 mm; (2) rectifying the deviation of the engineering pile with the deviation of 300mm-600mm by adopting a pushing and pulling method; and (3) when the deviation is more than 600mm, a pulling and stacking combined deviation correction method is adopted for deviation correction. The prefabricated concrete square pile is subjected to composite deviation rectifying treatment through a stacking method, a pushing method and a pulling method, the engineering cost is greatly reduced, the construction progress is accelerated, and good social benefits and economic benefits are achieved; besides, as long as the square pile has better pile body quality and pile body strength, the pile body is not obviously broken, the slight defect part of the square pile is not at the joint position, and the deviation belongs to the integral deviation of the pile body, the deviation can be corrected according to the construction process, so that the fund can be saved, the construction period can be ensured, and a reference can be provided for projects with similar conditions in the future.

The invention discloses a semicircular secant pile construction method. The semicircular secant pile construction method comprises the steps that 1, a semicircular steel mold is manufactured; 2, drilling holes are formed in the positions where the secant piles need to be poured through drilling equipment; (3) the local semicircular reinforcement cage is lowered into the drill hole formed in the step (2) through hoisting equipment; 4, the semicircular steel mold manufactured in the step 1 is put down into the drill hole formed in the step 2, and the semicircular steel mold is spliced with the upper part section of the local semicircular reinforcement cage; 5, a concrete guide pipe is inserted into the drill hole, and concrete pouring is conducted; and 6, the semicircular steel mold is pulled out through hoisting equipment, so that the semicircular steel mold is separated from the drilled hole. Compared with a whole pile pouring and half concrete chiseling method, the semicircular secant pile construction method has the characteristics of simplicity, convenience, rapidness and good pile forming quality. And the semicircular mold can be repeatedly used. The construction method can reduce the consumption of concrete and the chiseling of concrete in the later period, and meets the requirement of green construction.

The application discloses a high-pressure rotary jet grouting pile equipment for sedimentary rock pebble layer and a construction method thereof, and belongs to the field of foundation construction. The equipment comprises a caterpillar vehicle provided with guide rail columns and a mounting mechanism. A rotary chuck and a positioning mechanism are slidably arranged on the guide rail columns. A drill rod is detachably connected with a power head arranged on the rotary chuck. The positioning mechanism is used for limiting and driving a protective sleeve arranged on the drill rod. The protective sleeve is formed by sequentially connecting sleeve units at the head and tail. The mounting mechanism is used for mounting the sleeve unit to be mounted to the drill rod coaxially. The mounting mechanism comprises a base, a support frame and a hydraulic cylinder. The base is arranged above the positioning mechanism. The lower end of the support frame is rotatably arranged on the base. The upper end of the support frame is used for temporarily fixing the sleeve unit to be mounted. One end of the hydraulic cylinder is rotatably arranged on the base, and the other end is rotatably connected with the support frame. The sleeve unit can be mounted without stopping the operation, and each sleeve unit limits the drill rod, thereby ensuring the perpendicularity of the drill rod.

The invention provides a pile forming machine tool construction control method and machine tool for a spiral replacement cement reinforced soil pile, and relates to the technical field of long spiral replacement cement reinforced soil piles, the method comprises the following steps: adding a flow state cement reinforced soil composite material into a slurry stirring machine according to a preset proportion for mixing to obtain flow state cement reinforced soil; based on the pile position determined through surveying and setting out, drilling of a preformed hole is conducted through a spiral drill rod; flow-state cement reinforcing soil is poured into the preformed hole, and a spiral drill rod is lifted through a lifting system; the automatic control system dynamically adjusts the lifting speed of the spiral drill rod and the flow of the poured flow-state cement reinforced soil according to the monitored pressure numerical value of the pressure sensor; and after the spiral drill rod is lifted to the preset pile bottom elevation, pouring of the flow-state cement reinforcing soil is stopped, the drill rod is cleaned, and pile forming construction of the next pile position is conducted. According to the method, the lifting speed of the spiral drill rod and the flow of the poured flow-state cement reinforced soil can be better controlled in practical application.

The utility model relates to the technical field of construction drilling machine equipment, in particular to multi-channel powder spraying mixing pile drilling machine equipment which comprises a drilling machine main body, and the drilling machine main body comprises a drilling rod and a multi-layer mutual shearing mixing drill bit. At least a gas material channel and a gas flow channel are arranged in the drill rod, so that high-pressure gas and curing agent powder can be continuously, uniformly and quantitatively supplied to a gas material pipeline of the drilling machine. Gas-solid two-phase mixed compressed fluid and high-pressure airflow enter a focusing area at the bottom of the multi-layer mutual-shearing stirring drill bit through a gas material channel and an airflow channel of the drilling tool, and the two high-pressure fluids become more uniform after being reflected, mixed and gasified in the focusing area. High-pressure spraying and stirring of a foundation soil body are achieved through stirring blades of the multi-layer mutual-shearing stirring drill bit and nozzles at the far end and the near end, and curing agent powder and undisturbed soil body are fully stirred and mixed to form the large-diameter high-quality powder spraying stirring pile under the staggered-layer shearing stirring effect of the multi-layer mutual-shearing stirring drill bit.

The invention discloses a large-diameter cast-in-situ bored pile hole cleaning device under complex stratum conditions, comprising: a hole cleaning support member comprising an upper support member, a hole cleaning pouring rotary transmission member and a lower separation support member, the upper support member and the lower separation support member providing support for the circumferential rotation of the connected hole cleaning pouring rotary transmission member in a drill hole; the wall protection hole cleaning part comprises a rotating wall protection part, a wall protection power part and an upper hole cleaning part, the rotating wall protection part rotates on the hole cleaning pouring rotary transmission part in the circumferential direction of the hole cleaning pouring rotary transmission part, and the rotating wall protection part is driven by the wall protection power part connected with the rotating wall protection part to move in the axial direction of the hole cleaning pouring rotary transmission part; and the bottom hole cleaning part is used for cleaning the bottom of the drill hole below the lower partition supporting part. The hole cleaning quality and the hole cleaning efficiency can be remarkably improved, the pouring efficiency and the pile forming quality of the cast-in-place pile are remarkably improved, and falling and collapse of residues on the hole wall of the drilled hole can be remarkably reduced.