10020results about "Bulkheads/piles" patented technology

The invention relates to the technical field of engineering construction control, in particular to a self-adaptive control method and system for a cement mixing pile, and the method comprises the steps: setting the slurry preparation ratio parameter of a slurry preparation barrel of a feeding hopper according to the working information of the cement mixing pile, and conveying the prepared slurry to a slurry storage barrel of a discharging hopper; collecting a slurry static pressure signal of a slurry storage barrel of the blanking hopper, and monitoring the load dynamic characteristics of a stirring motor of the blanking hopper in real time in the stirring process; the slurry spraying quality parameters of the slurry are analyzed, and when the slurry spraying quality parameters reach the preset feeding standard, the slurry is conveyed to a slurry spraying pipeline to be matched with a cement mixing pile for pile forming work; when the guniting quality parameter exceeds the interval of the feeding standard, a real-time matching error is obtained; and generating a ratio correction instruction to correct the pulping ratio parameters. According to the invention, the dynamic closed-loop control of the pile forming quality of the cement mixing pile under the complex geological condition is effectively realized, and the industry bottleneck that the traditional open-loop proportioning system cannot respond to the slurry state change in real time is broken through.

The invention relates to the technical field of offshore wind power foundation engineering, in particular to an offshore wind turbine pile group structure suitable for complex geology and a mounting method of the offshore wind turbine pile group structure. The offshore wind turbine pile group structure suitable for the complex geology comprises guide assemblies and a pile group system frame, wherein each guide assembly is composed of a steel pipe pile guide sleeve, a jacket guide sleeve and a connecting ring plate, and the pile group system frame integrates the multiple guide assemblies through a connecting frame. The modular overall pile group structure design is achieved through the pile group system frame integrating the multiple guide assemblies and the connecting frame, the fan load is dispersed to the multiple pile foundations through the pile group synergistic effect, and therefore the bearing capacity of the whole foundation is improved, the foundation can adapt to different seabed geological conditions, and the construction efficiency is improved. The development requirement of offshore wind power in a complex environment is met, efficient installation, high bearing capacity and geological adaptability optimization of the offshore wind turbine foundation are achieved, stable support is provided for an offshore wind turbine generator, the construction cost is reduced, and the construction efficiency is improved.

The invention relates to the technical field of cast-in-place pile detection, and discloses a cast-in-place pile integrity detection system based on a multi-mode ultrasonic array, and the system comprises a deformable multi-mode ultrasonic probe which is used for adaptively adjusting the posture through an intelligent material driver; the intelligent coupling injection module is used for automatically cleaning the inner wall of an internal channel of the cast-in-place pile; the multi-source data processing module is used for receiving the original ultrasonic waveform data and the real-time position information of the ultrasonic probe; the deep learning recognition module is used for generating a recognition result including defect categories and preliminary features; the defect positioning and evaluating module is used for constructing a defect model comprising defect space coordinates, geometric dimensions and severity parameters; and the diagnosis decision module is used for providing targeted repair suggestions. The ultrasonic signals are transmitted and received through the integrated longitudinal wave transducer, the transverse wave transducer and the Rayleigh wave transducer, the internal structure information of the pile body is obtained, in this way, the ultrasonic beam coverage range is expanded, and the detection blind area of the area between the sounding pipes in a traditional method is effectively made up.

The invention belongs to the technical field of steel sheet piles, and discloses a steel sheet pile for compensating stratum loss during pile pulling and a construction method.The steel sheet pile comprises a plurality of steel sheet pile units, and each steel sheet pile unit comprises a plurality of steel sheet piles; the foundation pit sides of the steel sheet pile units are connected with a plurality of compensation bags, and grouting systems are arranged on the foundation pit sides of the compensation bags. The foundation pit side of the steel sheet pile is coated with viscous grease, the side, facing the steel sheet pile, of the compensation bag is coated with pressure-sensitive adhesive, and the compensation bag is temporarily connected with the steel sheet pile; the grouting system comprises a main grouting pipe, the bottom of the main grouting pipe is connected with a horizontal grouting pipe, the side, facing the steel sheet pile, of the horizontal grouting pipe is connected with a plurality of flow dividing pipes, and the flow dividing pipes correspond to the compensation bags. A vertical branch pipe is upwards separated from the middle position of the flow dividing pipe, and is connected with a grouting connector at the bottom end of the corresponding compensation bag; the tail end of the flow dividing pipe is downwards divided into an inclined grouting pipeline, and the inclined grouting pipeline faces the lower portion of the steel sheet pile. The technical problem that filling is not timely due to the fact that grouting pipes are installed to fill gaps after steel sheet piles are pulled out in the prior art is solved.

The invention relates to geotechnical engineering pile foundation equipment, in particular to intelligent cast-in-place pipe pile equipment integrated with a multi-source sensor and a construction method. A spiral sleeve; a double-layer sleeve wall protection system; an outer sleeve anti-rotation pressing system; and a pile core soil anti-rising telescopic system and the like. The intelligent PCC pile construction equipment integrates torque, rotating speed, drilling speed, drilling pressure and other multi-source sensors and an artificial intelligence algorithm to achieve intelligent sensing and control over a pile machine, efficient combined soil spinning of a spiral sleeve and a double-layer sleeve wall protection system is achieved through a hollow rotating power equipment system, an annular cavity is rapidly formed, a reinforcement cage is put down, concrete is poured to form a PCC pile, and the construction efficiency of the PCC pile is improved. Finally, the inner sleeve and the outer sleeve of the double-layer sleeve wall protection system are pulled out in a vibrating mode at the same time under the action of the winch up-pulling system, and the inner sleeve and the outer sleeve are in butt joint and reset with the annular rotary excavating soil taking system, the problems that a traditional PCC pile is limited in application in complex stratums and a reinforcement cage cannot be put down are solved, and the construction intelligence is achieved.

The invention relates to an offshore wind power pile foundation anti-scouring structure, and belongs to the technical field of offshore wind power construction, and the offshore wind power pile foundation anti-scouring structure comprises a pile foundation main body, a plurality of spoilers, a protective cylinder, a sand seepage cover and filling stones; the pile foundation main body is columnar, and the pile foundation main body is configured to be inserted into a seabed of a preset area; the pile foundation body is sleeved with the protection barrel, one end of the protection barrel is located on a seabed, the other end of the protection barrel is covered with the sand seepage cover, and a plurality of through holes are formed in the barrel wall of the protection barrel. The multiple spoilers are arranged outside the protective cylinder in the circumferential direction of the protective cylinder and connected with the protective cylinder, each spoiler comprises a spoiler vertical plate and a spoiler side plate, the spoiler vertical plate is parallel to the axis direction of the pile foundation body, and an acute included angle is formed between the spoiler side plate and the spoiler vertical plate; the space between the protective cylinder and the pile foundation body is filled with the filling stone, and the beneficial effect of prolonging the service life of the offshore wind power pile foundation is achieved.

Disclosed in the present invention are high-rise pile cap equipment under a horizontal load and a centrifuge test method for foundation bearing characteristics thereof. The equipment comprises a model box, a sand layer, a model pile cap, at least eight model piles, a horizontal loading device, at least two laser displacement sensors, an axial force sensor, and a plurality of strain gauges. The method comprises: S1, performing one-way horizontal loading on high-rise pile cap equipment under a horizontal load to obtain an ultimate foundation bearing capacity situation, a model pile body axial force distribution situation, a pile foundation axial force comparison situation, a model pile body bending moment distribution situation, and a model pile body bending moment comparison situation of the equipment; and S2, performing one-way variable amplitude cyclic loading on the high-rise pile cap equipment under the horizontal load to obtain a foundation displacement situation, an effect of the number of cycles on foundation stiffness, an effect of a cyclic load amplitude on the foundation stiffness, and a foundation inclination situation. In this way, the foundation design of the high-rise pile cap can be optimized, and a basis and a reference for evaluating safety of foundation long-term service are provided.

The invention discloses a side slope protection system based on slide-resistant piles, and belongs to the technical field of side slope treatment. The system comprises a data acquisition module, a digital twin modeling module, a multi-pile cooperative control module, an anti-slide pile parameter adjustment module, a stress change capture module and a risk prediction and early warning module. Multi-dimensional data are acquired in real time through the data acquisition module, the multi-pile cooperative control module divides a core group and a cooperative group, virtual parameters are dynamically adjusted in combination with the parameter adjustment module, the stress trend is tracked through the stress change capture module, and the risk prediction and early warning module generates multi-level early warning. The technical effects of slide-resistant pile supporting parameter dynamic optimization, pile group collaborative unloading, stability intelligent prediction and risk active early warning are achieved, and the problems that in the prior art, slide-resistant pile static design cannot adapt to slope dynamic changes, multi-pile collaboration is insufficient, risk assessment lags behind, and the parameter adjustment cost is high are solved.

The invention discloses an assembly type foundation pit support structure for controlling top deformation and a construction method thereof.The foundation pit support structure comprises precast piles, pile top beams and shear walls with end bearing plates, the pile top beams are arranged on the upper sides of the precast piles, shear connectors are pre-buried in the pile top beams, the shear walls with the end bearing plates are arranged between every two adjacent precast piles, and the end bearing plates are arranged between the precast piles. The tops of the shear walls with the end bearing plates are fixed to the pile top beams through shear connectors. Pit top cast-in-place concrete layers are arranged on the upper sides of the pile top beams and the shear walls with the end bearing plates, and stiff steel beams are arranged in the pit top cast-in-place concrete layers. The pile top crown beam, the shear wall with the end bearing plate and the pit top cast-in-place concrete layer are in reinforced connection with a soil layer outside the foundation pit through anchor rods. By constructing a mechanical transmission path of'soil layer-anchor rod-wall beam integration-pile 'cooperative bearing, soil pressure on the outer side of the foundation pit is efficiently transmitted to the precast pile through the anchor rod, the shear wall and the top beam, and deformation of the top of the enclosure structure is effectively controlled.

The utility model relates to the technical field of pile shoes, and discloses an anti-sinking pile shoe which comprises a cylindrical pile shoe body, four pile fixing blocks are arranged in the pile shoe body and evenly distributed around the inner wall of the pile shoe body, and a square through hole penetrating through the pile shoe body is formed in the circumferential face of the pile shoe body. Four movable assemblies are arranged at the bottom of the pile shoe body, and each movable assembly is arranged in the two through holes in a penetrating mode and connected with the pile fixing block. Through the arrangement of the movable assembly, the pile shoe can actively pierce into the stratum in the tripping-in process, bottom anchoring of the pile shoe is achieved, and lateral sliding of the pile shoe is prevented; the telescopic structure of the movable assembly can be slowly unfolded until the telescopic structure is completely located in the tripping-in process, the bottom area of the pile shoe is increased, the bearing performance is improved, better stability is achieved, and risks caused by differential settlement are reduced.

This invention relates to a construction method for driving piles using a vibratory driven pile unit. The original walking pile frame is replaced with a crawler crane. Utilizing the flexible movement of the crawler crane, the machine can move immediately after driving one pile to drive the next. At this time, crushed stone can be added to the previous pile, and then the pile can be extracted. This back-and-forth operation greatly improves construction efficiency. The crawler crane is equipped with an adjustment frame, which is fixed at the bottom by a bottom-fixing cylinder. The mast adjusts the upper position of the pile frame, and the adjustment frame adjusts the lower position of the pile frame, ensuring the verticality of the crushed stone piles during driving and extraction. During use, the mast adjusts the position of the pile frame, and the vibratory lifting mechanism drives the hoisting rope to move the vibratory hammer up and down through the slide frame for driving or extracting piles.

The invention discloses a freezing pipe relative position adjusting structure for inter-pile freezing water stop, which comprises an inner ring stirrup, the inner ring stirrup is fixed on the inner ring of an outer ring stirrup of a reinforcement cage, a freezing pipe is positioned between the inner ring stirrup and the outer ring stirrup, and a driving device drives the freezing pipe to move around the inner ring stirrup so as to adjust the relative position of the freezing pipe. The operation of lowering the freezing pipe along with the reinforcement cage is transformed, the position of the freezing pipe is adjusted through the driving motor, the accuracy can be guaranteed in the lowering stage, and after lowering is finished, the freezing pipe can be precisely and secondarily adjusted through the driving motor according to the inclination measurement result of the vertical hole, so that the accuracy is further guaranteed; the high-precision requirement for lowering the freezing pipe in the reinforcement cage can be met, and compared with the situation that multiple workers need to repeatedly adjust the lifting point and prize and correct in alignment in traditional construction, the labor cost and the alignment time are greatly saved.

The invention discloses a tailing pond underground anti-seepage wall grooving and quincunx curtain grouting synergistic process, and relates to the technical field of grouting collaboration.The tailing pond underground anti-seepage wall grooving and quincunx curtain grouting synergistic process comprises the following steps that S1, anti-seepage wall bodies are constructed in a foundation of a to-be-treated area, the anti-seepage wall bodies are continuously arranged along the treatment axis, a wall body groove section is formed through the underground grooving technology, and the wall body groove section is formed; s2, curtain grouting treatment is synchronously or firstly carried out on the lower area or the upstream side of the anti-seepage wall body, a multi-row sequential hole arrangement mode is adopted for curtain grouting, grouting holes are arranged in a staggered or quincuncial mode, a continuous curtain anti-seepage layer is formed, and the anti-seepage wall body is formed; and S3, the anti-seepage wall and the curtain grouting bodies are provided with lap joint areas in the vertical direction or the horizontal direction, and a wall-curtain integrated anti-seepage structure is formed. The plastic concrete anti-seepage wall is constructed in the foundation, the multiple rows of quincunx curtain grouting bodies are arranged in the foundation, and the lap joint structures are arranged between the plastic concrete anti-seepage wall and the multiple rows of quincunx curtain grouting bodies; unification of structural stability and anti-seepage continuity of the underground anti-seepage system is achieved.

The invention discloses a construction method for constructing a deep foundation pit by using an existing structure, and relates to the technical field of foundation pit construction.The construction method comprises the steps that the existing enclosure structure is positioned, a crown beam of the existing enclosure structure is chiseled away after excavation, and a fender post design scheme is confirmed; small-diameter secant piles are constructed according to the fender post design scheme, and a newly-built fender post is formed; the joint of the newly-built enclosure structure and the existing enclosure structure is reinforced; the crown beam is constructed, and the newly-built enclosure structure and the existing enclosure structure are connected; according to the excavation process, the defect position of the enclosure structure is reinforced; establishing and training a correlation model based on the water level data and the deformation data to obtain a water level deformation correlation model; and according to the real-time water level change, performing defect prediction and early warning on the enclosure structure in combination with the water level deformation correlation model, and reinforcing the defects of the enclosure structure. According to the method, the occupied area of the enclosure structure is reduced, the existing enclosure piles are repaired, and the defects of the enclosure structure can be accurately found and reinforced.

The invention discloses an air-pressure-assisted precession pile pressing method for a prefabricated pipe pile used for a soft and hard interaction layer working condition. The prefabricated pipe pile comprises a pile body, a pile head, a rotary supporting piece and a jet swirling rod. The jet swirling rod is fixedly connected with the pile head through a fixer carried by the pile head, and a jet pipe in the jet swirling rod is connected with a gas guide groove in the pile head; air nozzles and drilling threads are distributed on the surface of the pile head. According to the pile sinking method for the prefabricated pipe pile, the air pressure is used for assisting the screw-in pile pressing system, air curtain resistance reduction and pile head screw-in are combined, the integrated operation of penetration and pile forming is achieved, hole guiding is not needed, and the conventional procedures of secondary drilling pretreatment, backfilling, re-pressing and the like are avoided. The equipment can work continuously, multiple sets of machines and tools do not need to go in and out of the site repeatedly, mechanical and labor cost is saved, and the equipment is suitable for soft-hard interaction strata and high in construction efficiency.

The invention relates to the technical field of photovoltaic support pile foundation construction, in particular to an auxiliary device for photovoltaic support pile foundation construction, which comprises a base, an elastic limiting mechanism is arranged in the base, clamping frames are fixedly mounted on the outer side of the base at equal intervals in an annular arrangement, and clamping blocks are movably connected in the clamping frames. A connecting mechanism is fixedly installed on the outer side of the clamping block and installed in the clamping frame through an elastic limiting mechanism. The device can be flexibly combined and installed, the whole pile foundation structure can be promoted to form an integral structure, meanwhile, the device is provided with a corresponding adjusting structure, the whole device can be flexibly and adaptively adjusted, the pile foundation structures of different sizes can be stably clamped and positioned, a plurality of dispersed pile foundations can be promoted to be connected into a whole, and the practicability is high. The whole photovoltaic support has high adaptability, and meanwhile, the stability of the photovoltaic support in the whole application period can be further improved.

The present application discloses a method for measuring impact force of debris flow and application, and a design method for barrier energy dissipation pile array. The method for measuring vertical impact force of debris flow measures the tangential velocity of debris flow at the impact point to measure the vertical impact force distribution of debris flow on the impact point. Further, the design method for pile array simplifies the free section of energy dissipation pile as a cantilever beam, which generates a bending resistance when impacted by debris flow, and the bending resistance continuously works to dissipate the impact kinetic energy of debris flow. According to the motion characteristics of debris flow, the impact time and distance parameters are further derived to solve the problems of measuring and designing the stability parameters of single energy dissipation pile, the energy dissipation parameters of barrier energy dissipation pile array, and the number parameters of barrier energy dissipation pile array. The present application also provides the application of each measuring and designing method. The present application provides a more scientific and perfect solution for the energy dissipation design of barrier energy dissipation pile array to resist the impact damage of rockfall and debris flow caused by landslide disaster.

The invention discloses a foundation pit supporting strength self-adaptive adjusting method and system based on real-time monitoring data, and relates to the technical field of engineering control, and the method comprises the following steps: collecting monitoring data of a foundation pit supporting structure in real time; preprocessing the monitoring data to obtain standardized time series data; inputting the standardized time sequence data into a pre-trained LSTM prediction model, and outputting a displacement prediction value sequence; calculating a prediction state index based on the displacement prediction value sequence; with minimization of the maximum prediction state index and minimization of the total support strength adjustment cost as targets, a multi-target optimization model is constructed, and the optimal prestress adjustment amount of each intelligent support execution mechanism is solved; and the optimal prestress adjusting quantity is converted into a control instruction, and a corresponding intelligent supporting execution mechanism is driven to act. The foundation pit supporting strength can be automatically and accurately adjusted according to data monitored in real time.

The invention relates to the technical field of deformation prediction, in particular to a rock high slope excavation anchoring deformation prediction method based on artificial intelligence, and the method comprises the following steps: obtaining multi-source image data, analyzing rock volume and gravity center transfer, extracting a corresponding relation between abnormal stress and displacement, constructing a structure offset path, and screening continuous abnormal features. And extracting a key deformation rate interval to obtain an anchoring deformation trend prediction result. According to the method, the position of an unbalanced section is judged by constructing a gravity center transfer track and a mass difference space sequence and combining a coupling relation between a stress abnormal point and a displacement response direction, a collaborative evolution section of a structure offset path and a stress boundary is extracted, and a continuous abnormal zone is screened according to a crack change and joint fluctuation trend. A key change interval is extracted in combination with the time feature of the shear deformation rate, dynamic judgment of a structural deformation path and an extension direction is completed, and the spatial continuity recognition capability and the time response resolution are enhanced.

The invention discloses a local reinforcing device of a marine concrete pile and a construction method of the local reinforcing device, and belongs to the technical field of pile foundation construction engineering.The local reinforcing device comprises a reinforced concrete pipe pile, a steel pipe with an epoxy anti-corrosion coating and annular positioning hoops, and the upper end and the lower end of the outer wall of the steel pipe with the epoxy anti-corrosion coating are each connected with a set of annular positioning hoops; the steel pipe with the epoxy anti-corrosion coating and the reinforced concrete pipe pile are coaxially arranged, the steel pipe with the epoxy anti-corrosion coating is located at the broken pile position of the reinforced concrete pipe pile, and the steel pipe with the epoxy anti-corrosion coating and the reinforced concrete pipe pile are locked through the two sets of annular positioning hoops. By adopting the steel pipe with the anti-corrosion coating, welding the shear nails in the steel pipe, pouring the ultra-high performance concrete UHPC and a corresponding construction method, by utilizing the characteristics of high flowability, high impermeability and early high strength of the ultra-high performance concrete UHPC and combining the interface strengthening effect of the shear nails, the pain point of the traditional technology is accurately solved, and the construction efficiency is improved. And a reliable scheme is provided for ocean engineering broken pile reinforcement.

An expandable multifunctional integrated-construction skyscraper building platform and a construction method using the same are provided. The expandable multifunctional integrated- construction skyscraper building platform includes: a building foundation part, including an underground level, a basement level and a ground level which form a main body; an external frame part, a bottom of the external frame part being fixed deep into the underground level, and a top of the external frame part running through the basement level and the ground level to reach upper air such that lifting platform parts arranged on the external frame part are capable of going up from the underground level for construction; a transportation elevator part and a three-layer enclosure part, mounted on the building foundation part; a top transfer part, mounted on a Chinese character “Ri” frame at a top of the external frame part; and a carrying tower.

The invention discloses a large-diameter super-long permanent steel casing sinking positioning system and a construction method thereof. The large-diameter super-long permanent steel casing sinking positioning system comprises an adjustable lifting guide frame, an inner wall supporting component and a positioning monitoring and dynamic closed-loop deviation rectifying system. The guide frame is a double-layer guide frame with adjustable height so as to meet the sinking of steel casings with different lengths; transverse support members are arranged on the inner wall of the steel casing at equal intervals to prevent water pressure difference between the inside and outside of the steel casing at the deepwater position or local deformation under the action of impact load; the monitoring and dynamic closed-loop correction system comprises a total station scanner and a double-shaft inclinometer, the plane position and perpendicularity of the steel casing are fed back in real time, the steel casing is fixed through an automatic position adjusting jack and a V-shaped pressing block, the plane position and perpendicularity of the steel casing are dynamically corrected in real time, and it is ensured that the top face of the casing meets the construction standard. According to the positioning system and the construction method thereof, the technical problems of poor adaptability, low positioning precision, delayed deviation correction response and the like in the sinking process of a large-diameter super-long steel casing in a complex stratum in a deepwater area can be solved.

The invention relates to the technical field of wind power foundations, in particular to a wind power foundation and a construction method thereof. Comprising a base and four concrete pile foundations, a hydraulic column is installed at the top end of each concrete pile foundation, an expansion supporting piece is arranged on each concrete pile foundation, the movable end of each hydraulic column is hinged to the base, a universal ball seat is embedded in the center of the base, a foundation column is installed on the top face of the universal ball seat, and a limiting disc is installed at the bottom of the foundation column; a set of limiting springs are installed between the limiting disc and the base, the base column is slidably sleeved with a universal sliding sleeve, the top and the bottom of the universal sliding sleeve are each provided with a turbulent flow device, a lantern ring is embedded in the universal sliding sleeve, four universal hinge joints are embedded in the lantern ring, and four hydraulic push rods are hinged to the base. According to the invention, a wind-resistant stable system which takes an electric control system as a core and is deeply linked with the hydraulic push rod, the universal sliding sleeve and the turbulent flow device is constructed, and the technical breakthrough from passive bearing to active counteracting is realized.

The invention discloses a drainage and prevention combined type embankment structure and a construction method, and belongs to the technical field of water conservancy projects. The embankment structure comprises a base and a protection structure arranged on the base in a coherent mode, the protection structure is composed of main pipe piles and arc-shaped sheet piles which are arranged at intervals, and an embankment is divided into a backwater side and a waterside. Side edge and top consolidation bodies are formed at the bottoms of the main pipe piles through grouting of the auxiliary pipe piles and the miniature pipes so as to enhance bearing; the arc-shaped sheet piles are tightly connected with the main pipe piles through the connecting end plates, the cap beams, the locking opening pipes and the connecting bolts, and a sealing anti-seepage system is formed on the backwater side. Meanwhile, a water collecting and draining system is arranged in the main pipe pile, and water on the water facing side is allowed to be drained orderly through the water collecting holes, the graded gravel materials, the water collecting pipe and the drainage blind pipe. Through combination of'prevention 'and'drainage', the anti-seepage safety of the backwater side is ensured, seepage water is timely dredged to eliminate seepage pressure, damage to the structure caused by water pressure accumulation is avoided, and unification of stability and safety of the embankment structure is achieved.

The invention relates to the technical field of building construction, in particular to a large-diameter rotary excavating hole forming and long spiral cast-in-place pile combined construction method under special geology. Comprising the following steps: S1, positioning a pile foundation; and S2, a rotary drilling rig is used for installing a cutting tooth cylinder drill for drilling, and in the drilling process, a steel casing is synchronously followed up to support the hole wall. And S3, after the rotary drilling rig drills through the hard barrier layer, a drilling tool is replaced with a double-bottom cutting tooth bailing drilling bucket, and broken objects in the steel casing are cleaned. And S4, the cleaned holes are backfilled with plain soil to the ground surface. And S5, the steel casing is pulled out of the backfilled plain soil. And S6, a long spiral drilling machine is used for drilling in the backfilled pile position till the designed elevation is reached. And S7, concrete is poured to the position above the designed pile top elevation through a drill rod center pipeline of the long spiral drilling machine. And S8, after the concrete is poured, the reinforcement cage is implanted into the pile hole filled with the concrete. According to the method, the advantages of the two pile forming processes are combined, and continuous and reliable pile forming operation is expected to be achieved under the complex geological condition.

The invention relates to the construction technology of a hoop bottom die, and discloses a hoop bottom die integrated quick-mounting system which comprises a bottom die plate arranged on the outer side of the end of a vertical pile, and the bottom die plate is used for side die erecting and pouring forming positioning of a vertical pile cap; the main beam and the secondary beam are fixed to the bottom of the bottom formwork, first transverse rib plates and second transverse rib plates are fixed to the main beam and the secondary beam respectively, and a fastening and locking buckle assembly is arranged between the first transverse rib plates with the ends in butt joint; the hoop body is arranged at the end of the vertical pile in a sleeving mode through a bolt, hoop pressure-bearing ribs used for bearing and supporting the bottom formwork and the main beam are arranged on the side of the hoop body, and a hoop guide chain which is integrally detached in a hoisting mode is further arranged between the outer side of the hoop body and the secondary beam. According to the hoop and bottom die integrated quick assembly system, bottom die integrated quick assembly and disassembly construction of double-pile and single-pile cap construction operation can be achieved, secondary bottom disassembly during disassembly is not needed, and the die erecting and pouring efficiency of pile cap construction is improved.

The invention relates to the technical field of pile foundation construction, in particular to a long spiral secant pile construction method under water conservancy anti-seepage complex geological conditions, and the construction method comprises the steps that a long spiral pile driver is provided with a first power head and a second power head, a sleeve is pressed downwards through the second power head, and then the first power head is used for driving a drill rod to drill; the sleeve and the drill rod drill down synchronously until the drill bit drills to the elevation of the bed rock surface to form a pile hole; the sleeve is left in the pile hole, the rotary drilling rig is used for drilling the bed rock, a drill rod of the long spiral pile driver is put down to the bottom of the pile hole, concrete is pumped into the pile hole, and when the concrete is poured to the bed rock surface, the drill rod and the sleeve are lifted while the concrete is pumped into the pile hole till pressure pouring is completed. In a complex stratum with a huge thick loose high-permeability sandy gravel covering layer and ultrahigh-strength hard bed rock coexisting, high-precision stable hole forming and collapse prevention are achieved at the same time, hard rock is reliably and accurately drilled to reach the designed depth, and it is ensured that concrete secant piles are tightly engaged to form a continuous and effective diaphragm wall.

The invention relates to the technical field of environmental vibration reduction and isolation control, and discloses a vibration isolation pile, a row pile structure and a construction method of the vibration isolation pile, the vibration isolation pile comprises sleeves arranged between a subway tunnel and a basement, at least two sleeves are sequentially nested from outside to inside, and an annular filling space is formed between every two adjacent sleeves; a core filling space is formed in the inner cavity of the innermost sleeve; the annular filling space and the core filling space are divided into a plurality of vibration isolation sections in the height direction of the annular filling space and the core filling space, and each vibration isolation section corresponds to a soft soil layer or a hard soil layer on the outer side; in each vibration isolation section, the annular filling space and the core filling space are each internally provided with a rigid vibration isolation layer or a flexible vibration isolation layer, and the rigid vibration isolation layers and the flexible vibration isolation layers are alternately arranged in the radial direction of the casing pipe. The technical problems that in the prior art, the vibration isolation effect of a vibration isolation pile is the same, vibration isolation cannot be conducted according to vibration propagation characteristics and vibration isolation requirements of different soil layers, and the vibration isolation effect of the vibration isolation pile is poor are solved.

The invention relates to the technical field of pile foundations, in particular to a variable-section anti-seismic spiral pile foundation and a construction method.The variable-section anti-seismic spiral pile foundation comprises a pile body, a spiral blade set, a seismic isolation layer and an anti-seismic ring, and the spiral blade set and the pile body form the spiral pile foundation through pouring in a construction soil layer; the shock insulation layer is installed on the top of the pile body and integrated with the pile body through pouring, the anti-seismic ring is arranged outside the shock insulation layer in a surrounding mode and connected with the shock insulation layer, the spiral blade set is composed of a plurality of sets of spiral blades of different specifications, and the spiral blades are arranged upwards from the lower portion of the pile body from small to large. And compared with the scheme that the outer diameter of the blade is increased in the prior art, the economic construction cost is reduced, and the anti-seismic performance and the bearing capacity are synchronously improved.

The invention provides a granite residual soil side slope intelligent anchoring system and an instability early warning method, and the system comprises a multi-source sensing monitoring module which is used for collecting side slope rock-soil body permeability parameters, anchoring structure states and environment data in real time; the dynamic osmotic analysis module is used for dynamically correcting the osmotic coefficient and dividing a saturation region according to the real-time osmotic parameters in combination with the disintegration characteristics of the granite residual soil; the intelligent anchoring regulation and control module is used for regulating the prestress of the anchor rod and the working state of the drainage hole in real time based on the permeation saturation area distribution and the anchor rod state data; and the CNN instability early warning module is used for fusing the multi-source sensing data through a convolutional neural network, outputting a slope instability index and triggering early warning. The technical problems that an existing side slope anchoring system cannot accurately capture the penetration sudden change and anchoring degradation coupling risk of granite residual soil under heavy rainfall, the early warning precision is low, and response lags are solved.