48results about How to "Improve pile side friction" patented technology

The invention relates to a cast-in-situ bored pile with the wall protected through microorganism soil solidification and a construction method. The construction method includes the steps that a, a hole is drilled through a drilling rig, and meanwhile microorganism bacterium liquid is injected into the drilled hole and diffused into a foundation around the drilled hole; b, a separation plate is placed into the drilled hole; c, a cementing solution is injected into the drilled hole and diffused into the foundation around the drilled hole and reacts with the microorganism bacterium liquid to generate calcium carbonate crystals, and soil around the drilled hole is solidified; d, after the separation plate sinks to the bottom of the hole, the separation plate is lifted out; and e, the step a, the step b, the step c and the step d are repeated until hole forming is completed. Mud is not used for protecting the wall in the construction process of the cast-in-situ bored pile with the wall protected through microorganism soil solidification, so that mud cakes and pollution are avoided, and pile side friction resistance is brought into full play; in addition, a microorganism solidified soil layer and a microorganism wall protecting cementing surface are formed by the reinforced soil around the pile and can not only prevent hole collapse but also bear loads in combination with the pile, and therefore the bearing capacity of the single pile is improved.

The invention relates to a partial prestressed concrete bamboo joint pile; a central through hole penetrating through the whole partial prestressed concrete bamboo joint pile is formed in the longitudinal axis direction; the cross section of the inner periphery of the partial prestressed concrete bamboo joint pile is round; the cross section of the outer periphery of the partial prestressed concrete bamboo joint pile is round-angle triangular, round-angle quadrangular and round-angle hexagonal; the partial prestressed concrete bamboo joint pile comprises main ribs extending along the length direction of the bamboo joint pile and hoop ribs spirally surrounding the main ribs; the main ribs comprise prestressed ribs and non-prestressed ribs; concrete protection layers are arranged inside and outside the hoop ribs; the outsides of the main ribs are connected by the hoop ribs through fixing, roll-welding or binding; the prestressed ribs and the non-prestressed ribs are all positioned at the angles and the edges of triangles, quadrangles and hexagons defined by the hoop ribs; the partial prestressed concrete bamboo joint pile is provided with horizontal bosses; reinforcing ribs are arranged in the horizontal bosses. The triangles, quadrangles and hexagons, defined by the hoop ribs, at the outer peripheries of the prestressed ribs and the non-prestressed ribs are connected by binding or welding.

The invention discloses a while-drilling casing pile side sectional high-pressure grouting system and method. The grouting system comprises a prestress concrete tube pile, an upper end socket plate, a lower end socket plate, a grouting tube, a reserved tube and a baffle control structure, wherein the upper end socket plate and the lower end socket plate are arranged at the two ends of the prestress concrete tube pile. The upper end socket plate and the adjacent lower end socket plate are connected in a welded mode, and the upper end socket plate and the lower end socket plate are provided with connecting grooves which are formed in the radial direction of the prestress concrete tube pile and stretch out of the outer wall. A plurality of sealing baffles are movably arranged at the circumferential edge of the upper end socket plate. The grouting tube is inserted into the reserved tube. The grouting tube is provided with a grout outlet communicated with the connecting grooves. A plurality of through holes are formed in each of the upper end socket plate and the lower end socket plate. By means of the while-drilling casing pile side sectional high-pressure grouting system and method, high-pressure grouting is achieved, grout can enter peripheral rock and soil more deeply in a seepage or compaction or separation mode, a pile body and the periphery rock and soil are bonded, the friction resistance on the pile side is remarkably increased, and the bearing performance of the while-drilling casing pile is further improved.

The invention discloses a composite pile body formed by concrete and a concretion body and a construction method thereof; the composite pile body is formed by the different combination of the concrete pile body, a pile side concretion body formed by slurry sprayed from the pile side and a pile bottom concretion body formed by slurry sprayed from the pile bottom; the construction method comprises that: a hole is drilled to a preset depth by a driller; according to the need of a design proposal, the pile bottom concretion body is formed after slurry is sprayed from the pile bottom; the concrete is affused by lifting a drill stem, and the pile side concretion body with different shapes is formed by controlling the rotation of the drill stem and the spraying of the slurry; after the drill stem is lifted to the pile top and a height mark is designed, if the pile body is a reinforced concrete type composite pile body, a steel reinforcement cage also needs to be inserted to complete the construction of the composite pile body. The composite pile body formed by the concrete and the concretion body and the construction method can effectively improve the bearing capacity of the pile body and has high construction efficiency and high economical efficiency.

The invention discloses a bamboo-reinforced cement-soil pile with a plastic sleeve, which comprises a pile hole arranged in the soil body; a plastic sleeve is arranged in the pile hole, and a bamboo reinforcement cage is arranged inside the plastic sleeve; the plastic sleeve A grouting channel is provided in the pipe; cement soil is injected from the grouting channel, and the inner hole of the plastic casing is filled and the bamboo reinforcement cage is wrapped; a grouting filling is provided between the outer layer of the plastic casing and the pile hole. The construction method is construction preparation → pile driver in place → immersed pipe → hoisting into plastic casing → hoisting into bamboo reinforcement cage → pouring cement soil → vibrating pipe pulling → grouting or filling with sand and gravel → pile formation; construction method Simple, high construction efficiency, good construction quality and low project cost, can ensure the bearing capacity of the foundation of the project and meet the requirements of the construction period, effectively increase the pile side friction resistance, improve the bending and shearing resistance of cement-soil piles, and at the same time The pile body and the soft soil foundation are used to form a composite foundation with geogrid, which has high bearing capacity and can effectively solve the uneven settlement of the structure.

The invention discloses a static drill squeezed branch and pipe pile combined pile type. The static drill squeezed branch and pipe pile combined pile type comprises a pipe pile, a squeezed branch pile and an expanded pile, wherein the outer wall of the pipe pile is sleeved with the squeezed branch pile, and the expanded pile is connected with the end of the squeezed branch pile. The pipe pile is a hollow pipe. The pipe is filled with cement soil, and the solid pipe pile is formed. The squeezed branch pile comprises a squeezed branch pile body and squeezed branches distributed on the squeezed branch pile body at equal intervals in the axial direction. The squeezed branch pile is a cement soil pile. The expanded pile is an expanded concrete pile body. According to the static drill squeezed branch and pipe pile combined pile type, part of a soil body is extruded to the hole wall, the pile side friction is increased, discharge of an original soil body is reduced, meanwhile part of the residual soil body is dug out, a large-caliber pile foundation is formed, and the pile foundation bearing force is improved; then the squeezed branches are arranged, pre-pressure is applied to the side wall, the contact area of the combined pile and the soil is increased, the effective area of the pile body is increased, and the bearing force of the combined pile is improved; and then expansive concrete is pressed into a pile end expanded hole to form pre-pressure on the pile end, and the bearing capacity of the pile end is further improved.

The invention discloses a square cylindrical pipe pile which at least comprises a square pile body; and a half-cylindrical outer surface is arranged on the outer surface on each side of the square pile body. The invention further discloses a processing method of the square cylindrical pipe pile. Due to the structural design of the half-cylindrical outer surfaces, the shape of the outer surface of the pipe pile is improved, the friction coefficient of the outer surface is increased and the pile side friction force of the pipe pile is improved. Simultaneously, due to the structural design of the half-cylindrical outer surfaces, the end area of the pipe pile is enlarged and the pile-end bearing capacity of the pipe pile is increased. Therefore, the square cylindrical pipe pile integrates the advantages of a circular pile and a square pile, simultaneously overcomes the inherent defects of the circular pile and the square pile, and has the characteristics of higher anti-compression friction force, higher anti-shearing performance, higher anti-pulling capacity, significant progress and beneficial effects.

The invention relates to a prestressed concrete pipe pile combining a post grouting technology with an expanding technology. The prestressed concrete pipe pile comprises a prestressed concrete pipe pile body, a hemispheric pile head, a grouting hole, valves, hinges, a grouting pipe, line spray pipes, a hydraulic jack, a high-strength alloy blade, a blade fixing plate, a cubic thick steel cushion block, a blade outlet gap and spouting ports, wherein a grouting device is arranged in the prestressed concrete pipe pile body, the grouting device comprises a grouting pipe and the grouting hole, andthe grouting hole is formed in the outlet end of the grouting pipe; the line spray pipes are arranged at the two sides of the prestressed concrete pipe pile body; one spouting port is formed in each line spray pipe; one valve and one hinge are welded to each spouting port; and each valve is connected to the grouting hole through the corresponding hinge. The prestressed concrete pipe pile disclosedby the invention has the following beneficial effects: due to the adopted pile-side post grouting technology, the exertion level of pile-side friction resistance can be increased to a large extent; and moreover, compared with the traditional point grouting technology, the pile-side friction resistance is much easily increased due to line grouting, so that the bearing capacity of a pile body is improved.

The invention relates to a technical field of civil engineering, in particular to a multi-power guide linkage compound drilling tool, a preparation method and a pile type. The drilling tool comprisesa guide linkage drilling tool, a middle power drilling tool and an upper power drilling tool arranged in turn with a shaft sleeve. The upper power drill and the middle power drill are respectively provided with a power mechanism. The guided drilling tool is provided with a guide device. At least one of the guide drilling tool, the middle power drilling tool and the upper power drilling tool is composed of a drilling tool body with function of squeezing and discharging soil. In construction, each drill tool is transformed from a traditional linkage mode to an active drive with linkage auxiliarymode. The squeezing and discharging of the soil, and the drilling and grouting concrete pilling can be achieved at the same time. The automation degree is high and the work efficiency is improved. The modified diameter of a pile and reasonable working method make the bearing capacity of single pile be further increased, thereby reducing cost. Comprehensive factors above shorten the duration of construction.

The invention discloses an expressway soft foundation intelligent processing and monitoring system and a monitoring and early warning method. The system comprises a highway soft foundation processingscheme cloud database module, , a snowflake-shaped steel sheet pile 3D printing module, a snowflake-shaped steel sheet pile deformation optical fiber sensing module, a roadbed settlement optical fibersensing module, a climate change optical fiber sensing module, an optical fiber data automatic acquisition and transmission module, an on-site road condition monitoring module, a solar power supply and data transmission module, an optical fiber data processing and analysis module, a monitoring result display module, a highway soft foundation processing effect evaluation module, a soft foundationprocessing effect cloud platform data management and early warning module and a mobile phone remote receiving module. During monitoring, 3D printing and snowflake-shaped steel sheet piles are used forrapid construction, BOTDR is used for monitoring roadbed settlement, snowflake-shaped steel sheet pile deformation and climate information, an evaluation result is displayed on a mobile phone mobileterminal in the form of a chart, and remote monitoring and long-term evaluation are realized for a road section secondary reinforcement scheme with an unsatisfactory processing effect.

The invention discloses a square cylindrical corrugated tube pile which at least comprises a square cylindrical pile body. The outer surface of each edge of the square cylindrical pile body is of a corrugated shape. The invention also discloses a processing method of the square cylindrical corrugated tube pile. For the square cylindrical corrugated tube pile disclosed by the invention, due to the structure design of the corrugated outer surface, the shape of the outer surface of the tube pile is improved, the friction coefficient of the outer surface is increased, and the pile-side friction of the tube pile is improved. Meanwhile, due to the structure design of the corrugated outer surface, the end area of the tube pile is increased and the pile end bearing capacity of the tube pile is improved. Therefore, the square cylindrical corrugated tube pile disclosed by the invention combines the advantages of a round pile and a square pile, the respective inherent defects of the round pile and the square pile are also overcome, and the square cylindrical corrugated tube pile has higher compression resistance friction, higher shear resistance and higher pull-out resistance capability and has obvious progressive and beneficial effects.

The invention discloses a quincunx-shaped reinforced pipe pile, which at least comprises a pile body and is characterized in that the cross section of the pile body is quincunx-shaped. The invention additionally discloses a fabrication method of the quincunx-shaped reinforced pipe pile. Since the design of a semicircular quincunx-shaped structure is adopted, the exterior shape of the pipe pile is improved, the friction coefficient of the exterior surface is increased and the pile side friction of the pipe pile is improved. Moreover, also since the design of the semicircular quincunx-shaped structure is adopted, the end area of the pipe pile is increased and the pile end bearing capacity of the pipe pile is improved. Therefore, the quincunx-shaped reinforced pipe pile disclosed by the invention has the advantages of a circular pipe and a square pipe, overcomes the inherent defects of the circular pipe and the square pipe at the same time, has higher anti-pressing friction, higher anti-shearing performance and a higher anti-pulling ability, and makes an obvious progress and a beneficial effect.

The invention discloses a square-prism-reinforced pipe pile, which at least comprises a square pile body. A prismatic outer surface is arranged on the outer surface at each side of the square pile body, and a reinforcing rib is also arranged on the outer surface of the square pile body. Furthermore, the invention discloses a machining method of the square-prism-reinforced pipe pile. Due to the structural designs of the prismatic outer surface and the reinforcing rib, the square-prism-reinforced pipe pile provided by the invention is improved in outer surface shape, increased in friction coefficient of the outer surface and enhanced in pile-side friction force. Simultaneously, due to the structural designs of the prismatic outer surface and the reinforcing rib, the square-prism-reinforced pipe pile is also increased in end area and improved in pile-end bearing capacity. Therefore, the square-prism-reinforced pipe pile provided by the invention has the advantages of a round pile and a square pile, simultaneously also overcomes the respective inherent disadvantages of the round pile and the square pile and is higher in pressure-resistant friction force, higher in shear performance, higher in pullout resistance, and obvious in improvement and beneficial effect.

The invention relates to a settlement prevention method for a bridge pile foundation. The settlement prevention method comprises the following steps of (S1) excavating a foundation pit at a specified soil layer, and paving a compensation layer above the foundation pit; (S2) paving a first concrete layer on the compensation layer, and fixing a screw pile of the pile foundation to the interior of the first concrete layer after a positioning block of the pile foundation is fixed to the pile foundation; (S3) paving a second concrete layer between the first concrete layer and the lower part of a bearing platform after the bearing platform is placed on the upper end face of the pile foundation; and (S4) paving a backfill soil layer on the second concrete layer and tamping. According to the settlement prevention method, the pile side friction resistance and the bearing capacity of the pile foundation are improved, and settlement is slowed down.

The invention provides a cement-soil composite prefabricated threaded pile and a pile forming method thereof. The cement-soil composite prefabricated threaded pile includes: a cement-soil pile and a prefabricated threaded pile arranged in the cement-soil pile; the prefabricated threaded pile is inserted into the cement-soil pile by a drilling machine after the cement-soil pile is piled. inside the pile. The method for forming a cement-soil composite prefabricated threaded pile includes the following steps: step A: first forming a cement-soil pile; step B: using a drilling rig to place the prefabricated threaded pile into the cement-soil pile to form a cement-soil composite prefabricated threaded pile. The present invention enhances the side-limiting effect of the soil around the prefabricated threaded pile and the cement-soil, increases the pile side frictional resistance of the prefabricated threaded pile, thereby forming a cement-soil composite prefabricated threaded pile with higher vertical compression resistance, pull-out resistance and horizontal bearing capacity .