42results about How to "Reduce the number of piles" patented technology

The invention relates to a construction method of a spiral oil-extruding filling pile composite foundation in the stratum containing soft clay, which comprises the following steps: determining the structural size, the position and the number of spiral oil-extruding filling piles; manufacturing and constructing a vertical drainage well in the middle part of the design positions of every two adjacent spiral oil-extruding filling piles; manufacturing and constructing each spiral oil-extruding filling pile according to the design position in the middle part between every two finished vertical drainage wells; and then paving drain liner layers on the foundation surface. The invention aims at providing a method for treating the spiral oil-extruding filling pile composite foundation in the stratum containing the soft clay, which avoids the negative oil-extruding effect of the spiral oil-extruding filling piles, improves the drain speed of saturated clay around piles, improves the strength of soil bodies around the piles and under the piles, substantially reduces the settlement after construction, improves the effectiveness and the use range of the spiral oil-extruding filling piles, increases the space length between the piles, reduces the pile number, saves the engineering investment, and accelerates the construction progress.

A method for pouring concrete into pile hole and compressing and its vibrator are disclosed; including the following steps: (1) according to the work mode of concrete pile to choose the type of vibrator, use shape steel or steel pipe as the structural force-passing element; when there is mud staying in the upper part, use steel pipe; (2) pour concrete into the pile hole; (3) insert the vibrator into the concrete to vibrate and stress. The method suits for CFG pile dry work pouring pile method, wet work circulative pouring method and digging-drilling method etc.

The invention discloses a method for constructing a long auger bored cast-with-pressure concrete uplift pile. The method for constructing the long auger bored cast-with-pressure concrete uplift pile comprises the steps that the preparation for construction is made, paying-off for positioning is conducted, a drilling machine is prepared to work, a hole is formed by the drilling machine, drill lifting and fine aggregate concrete pouring are conducted at the same time, the hole is sealed and grouting is conducted, a steel reinforcement cage is inserted, and drilling tools and an earthwork are cleaned. The method for constructing the long auger bored cast-with-pressure concrete uplift pile has the advantages that concrete is pressed in a soil body and is located on the bottom and the side wall of the pile according to the specific grouting technique, the concrete and the soil body are glued into a whole, and in this way, the contact area between a pile body and the soil body is increased; compared with a traditional uplift pile, the uplift performance of the long auger bored cast-with-pressure concrete uplift pile is improved remarkably.

The invention discloses a deep-hole inverted-T-shaped pile based high-rise earthquake-resistant building structure, which is characterized in that a whole-plate foundation is supported by a lower cast-in-place pile, underground and aboveground buildings are sequentially constructed on the whole-plate foundation, the cast-in-place pile is a deep-hole inverted-T-shaped pile, and a pile-base shock-insulating pad is arranged between a pile leg and a foundation. According to the invention, the construction is performed based on the deep-hole inverted-T-shaped pile, so that the bearing capacity of a single bearing pile is effectively improved, and the number of the pile and the construction cost can be significantly reduced. According to the invention, the bottom of the inverted-T-shaped pile is provided with the pile-base shock-insulating pad, and a basic shock-insulating pad is arranged below the whole-plate foundation, so that the vibration of earthquakes is absorbed by using a soft cushion pad below a rigid structure, therefore, an earthquake-resistant effect can be effectively achieved, the earthquake-resistant capacity of a building can be improved, and the life safety of residents in disasters can be ensured.

The invention provides a pipe pile with post-pressure-grouting grouting pipes. The pipe pile comprises a pipe pile body, the grouting pipes which are arranged in the pipe pile body and symmetrically arranged with the axis of the pipe pile body as the center and a steel pile point arranged at the lower end of the pipe pile body. Slurry discharge holes are formed in the positions, corresponding to the pouring pipes, on the steel pile point. Blocking plates which are used for covering the slurry discharge holes and can be jacked up by the grouting pressure are welded to the positions corresponding to the slurry discharge holes in a spot welding manner. The two grouting pipes are vertically arranged. The pipe pile body is formed by the multiple-joint butt joint. Each grouting pipe comprises multiple sections matched with the sections, corresponding to the grouting pipe, of the pipe pile in length. The portions, close to the joints of the pipe pile body, of the sections of the grouting pipes are connected through pipe joints. By the adoption of the pipe pile with the post-pressure-grouting grouting pipes, the single-pile bearing force of the prefabricated concrete pipe pile is improved effectively, the modulus of compression of foundation soil is increased, the settlement of a building is reduced, the pile length is reduced, the number of piles is reduced, the stability of the building is guaranteed, and the building cost is saved.

The invention relates to a core-grouted static pressure anchor rod pile forming device, which comprises a standard pile section and a bottom pile section, wherein a hard plastic pipe is embedded in the center of the cross section of the standard pile section; the bottom end of the hard plastic pipe is connected with a straight-through hollow chamber, and the four corners of the top end thereof are respectively provided with an anchor rod hole; the four corners of the bottom end of the standard pile section are respectively provided with a connecting hole; the connecting holes correspond to the axial positions of the anchor rod holes; a bottom hard plastic pipe is embedded in the center of the cross section of the bottom pile section; the bottom end of the bottom hard plastic pipe is in threaded connection with a hard plastic casing pipe; the four corners of the top surface of the bottom pile section are respectively provide with a bottom anchor rod hole; the bottom anchor rod holes correspond to the axial positions of the anchor rod holes; reinforcing steel bars the upper parts of which are provided with nuts are anchored into the bottom anchor rod holes; the nuts and the connecting holes are configured; a plurality of lower outlet pipes are communicated in the circumferential direction of the hard plastic casing pipe; and a plurality of upper outlet pipes are communicated in the circumferential direction of the straight-through hollow chamber. The invention has the advantages that firstly, the value of the pile bearing capacity can be increased, and thereby, the number of piles can be decreased so as to reduce construction cost, and the quality is reliable; secondly, the influence of compaction soil on adjacent buildings can be reduced so as to protect the surrounding construction environment.

The invention discloses a horizontal bearing combined foundation based on piles and an underground continuous wall and a method.The horizontal bearing combined foundation comprises the underground continuous wall and the multiple horizontal load-bearing piles arranged underground, a top plate is arranged at the top face of the underground continuous wall, the horizontal load-bearing piles are embedded into the bottom face of the underground continuous wall, and the combined foundation is used for bearing horizontal loads.The piles and the underground continuous wall are combined to serve as the foundation bearing horizontal loads, the advantage of high horizontal rigidity of the underground continuous wall is brought into play, and meanwhile embedding of the foundation is guaranteed through the piles on the lower portion.

The invention discloses a fan bearing platform assembly improving pile uplift bearing capacity. The fan bearing platform assembly comprises a bearing platform and foundation piles supporting the bearing platform; the bearing platform comprises a cylindrical upper platform column, a middle cylindrical middle platform column, a lower inverted circular truncated cone and an annular bottom convex platform which are concentrically connected in the axial direction; the diameter of the upper platform column is smaller than that of the cylindrical middle platform column, the large diameter of the upper portion of the lower inverted circular truncated cone is equal to the diameter of the cylindrical middle platform column, and the outer diameter of the bottom convex platform is equal to the small diameter of the lower portion of the lower inverted circular truncated cone; an anchor bolt cage connected with a fan tower barrel stretches into the bottom of the bearing platform; a lower anchor plate of the anchor bolt cage is located in the bottom convex platform, and an upper anchor plate of the anchor bolt cage is located above the upper platform column; the conical surface of the inverted circular truncated cone and the surface of the bottom convex platform are coated with cushion layers; and the bottom of the bearing platform is vertically provided with one or more circles of cylindrical foundation piles. By inverting a traditional bearing platform type structure, the thickness of a soil covering body is decreased, the excavation quantity and the backfill quantity of bearing platform soil are substantially reduced, the vertical pressure of the piles is reduced, the uplift force of the piles is increased, and the construction difficulty is lowered.

The invention discloses a drilling and high-pressure grouting construction method for an uplift pile. The drilling and high-pressure grouting construction method includes the steps that step1, construction preparation is performed; step2, paying-off positioning is performed; step3, a drilling machine is in place; step4, drilling is performed; step5, casing running is performed; step6, drilling is continued to a designed elevation; step7, hole sealing grouting is performed; step8, concrete pouring is performed; step9, steel bars are inserted; step10, drilling tool and earthwork clearing is performed. The drilling and high-pressure grouting construction method has the advantages that in the drilling process, noise is low, vibration is small, the construction period is short, influences on surrounding traffic and social activities are small, and the construction method is a green construction method; while the uplift bearing capacity of a foundation is improved, the construction method saves a lot of resources and energy, and has remarkable social benefits.

The invention provides a foundation pit supporting composite retaining wall with water pumping and recharging functions. The foundation pit supporting composite retaining wall comprises a plurality ofpipe piles, connecting structures, a water pumping structure and a recharging structure. The plurality of pipe piles are arranged in the circumferential direction and are of hollow structures; the connecting structures are connected with the two adjacent pipe piles to form a circumferentially closed retaining wall; the water pumping structure is arranged on the pipe wall of at least one pipe pile, faces the inner side of the foundation pit, communicates with a soil body on the inner side of the foundation pit and the hollow structure, and is suitable for guiding underground water on the innerside of the foundation pit into the hollow structure of the pipe pile; the recharging structure is arranged on the pipe wall of the pipe pile provided with the water pumping structure, faces the outer side of the foundation pit, is located above the water pumping structure and communicates with the soil body and the hollow structure on the outer side of the foundation pit, is suitable for recharging the underground water in the hollow structure into the soil body on the outer side of the foundation pit. The invention further provides a construction method of the foundation pit supporting composite retaining wall.

The invention discloses a tensile type pile soil deformation coordinator. The tensile type pile soil deformation coordinator comprises an outer barrel, a push rod, a ductile plate, a force transmission end plate and a force transmission pendant; the outer barrel is a barrel-shaped member, one end of the barrel-shaped member is opened, the force transmission pendent is buckled on an opened port of the outer barrel, the force transmission end plate is sleeved by the inner cavity of the outer barrel in a clearance manner, the ductile plate is sleeved by the inner cavity of the outer barrel, the two ends of the ductile plate are respectively connected onto the inner bottom surface of the force transmission pendant and the force transmission end plate, the push rod penetrates through a through hole at the middle part of the force transmission pendent and penetrates into the outer barrel, and a penetration end of the push rod is propped against the force transmission end plate. As the ductile plate is sleeved by the inner cavity of the outer barrel and the two ends of the ductile plate are respectively connected onto the inner bottom surface of the force transmission pendant and the force transmission end plate, the thickness and the width of the ductile plate (low yield point steel) are adjusted through calculation, so that the pressure-displacement curve of equipment at various tonnages meets the specific response spectrum, and the tensile type pile soil deformation coordinator has the advantage that the load on the soil is easy to control when a compound pile foundation is designed.

A high-bearing-capacity micro-settlement shearing resistant prestressed pipe pile is provided with a cylindrical prestressed reinforced concrete pile body and is characterized in that a grouting pipe is arranged in a pipe cavity or the pipe wall of the prestressed pipe pile, a pile large end formed by cement slurry poured in after pile forming is arranged at the end of the pipe pile, and a reinforcement cage is placed into the pipe cavity and concrete is poured when the material strength of the pile body is smaller than the sum of side resistance and end bearing capacity of the soil layer to form a reinforced concrete pile core. Compared with the originally designed punched and drilled pile, the engineering pile production price can be reduced by 50-70%, the construction period is shortened by 60-70%, mud pollution is avoided, the field is clean and civilized, and the post-construction settlement amount is small. Compared with the existing prestressed pipe pile, the single pile bearing capacity of the prestressed pipe pile is greatly improved, the number of the piles used in projects is reduced, production cost is reduced and the construction period is shortened.

The invention discloses a multi-branch disk square bored pile and belongs to the field of buildings. The multi-branch disk square bored pile comprises a pile body, a steel reinforcement cage and concrete branch disks, wherein the steel reinforcement cage is arranged in the pile body; the concrete branch disks are arranged on the pile body. Compared with a square bored pile with equal length and equal sectional area, the multi-branch disk square bored pile has the advantages that under the condition that only a small number of concrete materials are added, the bearing capacity of a single pile is improved to a larger extent, the number of piles is decreased, and the cost of pile foundation engineering is reduced.

The invention discloses a suspended reverse wall working well supporting structure and a construction method, solves the problem of poor strength of a working well supporting structure in the prior art, and has the beneficial effects that the working well supporting structure is improved, and the construction is facilitated. The specific scheme is as follows: the suspended reverse wall working well supporting structure comprises a well wall; the well wall comprises multiple sections from top to bottom; every two adjacent sections of well walls are connected; the top of the well wall extends towards the peripheral side to be provided with a coping plate; the coping plate is connected with the well wall to form a suspended well wall; a plurality of rows of supporting piles are arranged at the outer side of the well wall in the width direction of the coping plate; the insides of the supporting piles are hollow; the coping plate is connected with the top of each supporting pile through pouring of the coping plate and concrete pouring in the supporting piles; and all the supporting piles and the coping plate are used as a composite suspension stress structure to suspend the well wall.

The invention provides an I-shaped bidirectional row pile foundation with prestressed pull rods and anti-push retaining walls. The I-shaped bidirectional row pile foundation comprises an I-shaped pile bearing platform, hole digging piles, an underground diaphragm wall and straining beams, the upper end face of a web plate of the I-shaped pile bearing platform is connected with arch feet and is parallel to the projection line direction of a main arch on the horizontal plane, flanges intersect with the projection line direction of the main arch on the horizontal plane, the hole digging piles are distributed on the lower end face of the I-shaped pile bearing platform at equal intervals, the hole digging piles and the I-shaped pile bearing platform form a row pile foundation, the underground diaphragm wall is arranged on the lower end face of the I-shaped pile bearing platform, the extending direction of the underground diaphragm wall is parallel to the flanges of the I-shaped pile bearing platform, and the underground diaphragm wall is located on the edge of the flange on the side, close to the tail end of the arch axis, of the I-shaped pile bearing platform. The straining beams are reinforced concrete prestressed straining beams, horizontal loads generated in the out-of-plane direction when the main arch inclines can be effectively resisted through the web structure of the I-shaped pile bearing platform, and meanwhile damage to a roadbed close to the arch feet is avoided.

The invention discloses a construction method for solving pile foundation over-filling and sediment in karst regions. The method comprises the following steps: a rotary pile drilling machine or a down-the-hole hammer is adopted to guide a hole, the diameter of the guide hole is 20-100mm larger than that of a tubular pile, and a proper amount of fine aggregate concrete is poured into the range of abearing stratum at the lower end part of the tubular pile. After the prestressed high-strength concrete pipe pile is conveyed to be close to the bottom of a hole, a hammering pile driver or a staticpressure machine is started, a gap between the pipe wall and the hole wall of the pipe pile is filled with fine aggregate concrete poured into the pile end in advance through extrusion, the pile end is stabilized, and the sediment problem is solved. The method well solves the difficult problems of pile foundation over-filling and pile bottom sediment in karst regions. Compared with a traditional cast-in-place pile, the cast-in-place pile has obvious advantages in the aspects of construction quality, construction period and engineering investment.