6results about How to "Improve pile quality" patented technology

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.

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.

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 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 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.