58results about How to "Reduce pile diameter" patented technology

The invention relates to a self-supporting construction method for a multilayer underground structure next to an existing building. When the distance between a proposed underground building and the existing building is within 15 meters, the construction method is adopted, and the method specifically comprises the following operation steps: 1, supporting pile construction; 2, developing and controlling an earthwork of a negative first layer; 3, controlling holes at a frame column position and setting a retaining wall; 4, carrying out the construction of frame columns of a negative second layer; 5, carrying out the construction of top beams and plates of the negative second layer and columns, beams and plates of the negative first layer; 6, mounting horizontal steel supports; 7, developing and digging the earthwork of the negative second layer; and 8, carrying out the construction of other structures of bottom plates, walls and the like of the negative second layer according to a conventional method. The method skillfully uses the rigidity of an underground engineering structure self to provide a supporting point for the supporting pile so that the supporting pile is changed into a three-span indeterminate member from a cantilever member, so the bending moment load effect of the supporting pile is greatly reduced, then the designed pile length and section area of the supporting pile can be greatly reduced, the construction cost is saved by about over 35 percent, and the integral construction progress of the underground structural engineering is accelerated.

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 an offshore wind power and marine ranching integrated structure system, and relates to the field of wind power generation. The offshore wind power and marine ranching integrated structure system comprises a central pile, side piles, horizontal rods, connecting ends, upper stay cables, lower stay cables and a marine aquiculture area. The upper end of the central pile is connected with the bottom of a fan tower, and four or six or eight side piles are arranged around the central pile. The central pile and the side piles as well as the side piles are connected through the horizontal rods, the upper stay cables and the lower stay cables. The marine aquiculture area is defined by the side piles, the horizontal rods and the lower stay cables. According to the structure system, the multi-pile foundation form with good bearing capacity and overall stability is adopted, the problems of overlarge section design, difficult pile driving and insufficient rigidity of traditional single-pile foundations are solved, and on-site installation is convenient; the aquiculture area is arranged in a wind power foundation, so that offshore wind power and marine ranching are organically combined, the influence of offshore wind power plant construction on the fishery can be reduced, synchronous development of the offshore wind power industry and the marine ranching industry is promoted, and wide engineering application prospects are achieved.

The invention discloses a composite pile foundation structure. Cylindrical connecting sections are respectively arranged in the centers of the top and the bottom of a truss on the three-pile tripod foundation; the upper and lower connecting sections are inserted into a single-pile foundation; the single-pile foundation is fixedly connected with the connecting sections; and welding, grouting connection through a shear key or elastic connection through an elastic body can be adopted. The advantages of definite stress of the single-pile foundation, high soil layer applicability, convenient construction, high horizontal bearing capacity of the three-pile tripod foundation and the like are fully utilized, compared with the independent single-pile foundation or the three-pile tripod foundation, the composite pile foundation structure has the advantages that the integral rigidity, horizontal load resistance, vertical load resistance and bending moment resistance are greatly improved, particularly the stress mode of the single-pile structure is changed, the bending moment load of the fan load on the foundation is effectively realized, and the horizontal displacement of the wind power structure is reduced, so that the pile length, the pile diameter, the wall thickness and the penetration depth of the pile foundation are reduced; and therefore, the material cost is greatly reduced, and the construction process is simple.

The invention provides a prestressed foundation pit support bored pile, which comprises a hollow cylindrical pile body. A cavity communicating in the axial direction of the pile body is formed in thepile body, and reinforcements are arranged in the cavity; a reinforcement cage is tightly connected with the pile body, a plurality of prestressed reinforcements are arranged on the positions, close to the excavated side of a foundation pit, on the pile body at intervals and extend in the axial direction of the pile body, and corrugated pipes coaxially sleeve the prestressed reinforcements; the top ends of the prestressed reinforcements and the top ends of the corrugated pipes are fixed to the end face of the top end of the pile body through anchorage devices; and the bottom ends of the prestressed reinforcements penetrate through the corrugated pipes and are fixed to the pile body through anchorage sections.

The invention discloses a method of crude soil solidifying pile sinking used in building operation and its construction device. The method of pile sinking is that cut moving is stirred into stirred cut crude soil as pre-selected at pre-calculated position of the ground base; prepared curing agent is pressed into the stirred cut crude soil and stirred uniformly into solidified soil; the prefabricated pile is sunk into the solidified soil, the ground base is formed into crude soil solidified pile base. The construction device includes bottom head, stirring machine upright equipped on the bottom head, deep lift stirring machine equipped on the stirring machine upright, pile driver upright equipped on the bottom head, pile driver equipped on the pile diver upright. The advantage of the ground base formed by this method is high intension, strong bearing capacity, and low cost.

The invention discloses a pile type offshore embankment, a design method and application, and belongs to the technical field of coast engineering. The arrangement structure of the pile type offshore embankment is in a sine curve form. The design method comprises: collecting historical data such as a shoreline, water depth and a wind field near a to-be-shielded area; determining a to-be-shielded sea area range, a corresponding wave frequency spectrum and a direction spectrum, and calculating an input condition of S3; and determining the length L of the main axis of the offshore embankment, the sine wave length (m) of a control element in a sine curve arrangement form, the sine amplitude A of a non-control element, the spacing d of single piles of the control element, the number N of the single piles and the width a of the single piles of the non-control element. The interference of long-period waves can be effectively blocked through sinusoidal array arrangement, wave resonance of a to-be-shielded area is avoided, meanwhile, the interference of short waves can be effectively blocked through the single piles arranged in an array mode, the wave dissipation frequency is expanded from the narrow bandwidth to the wide bandwidth, and then the wave blocking efficiency of the pile type offshore embankment is improved.

The invention relates to an offshore wind-driven generator multi-pile-suction barrel-jacket foundation structure and a construction method thereof. The offshore wind-driven generator multi-pile-suction barrel-jacket foundation structure and the construction method thereof are simple in structure, convenient to construct, low in cost, safe and stable. According to the technical scheme, the offshorewind-driven generator multi-pile-suction barrel-jacket foundation structure is characterized in that a plurality of suction barrels are uniformly arranged at the bottom of a jacket, wherein guide sleeves communicating with the interiors of the suction barrels are arranged in the centers of the tops of the suction barrels; the jacket is supported on a seabed through the suction barrels and fixed to the seabed through steel pipe piles inserted into the guide sleeves and driven into the seabed; and high-strength grouting materials are poured into gaps between the guide sleeves and the steel pipepiles. The offshore wind-driven generator multi-pile-suction barrel-jacket foundation structure and the construction method thereof are suitable for the technical field of ocean engineering.

The invention discloses a static pressure type rear support screw pile based on bionics, which comprises a pile tip, an outer sleeve, a flange and an empennage, the empennage is arranged at the upperend of the outer sleeve, the flange is arranged at the top ends of the empennage and the outer sleeve, an outer support blade is arranged at the lower part of the outer sleeve, and when the outer support blade is pressed at the top of the outer sleeve, the outer supporting blades are unfolded outwards. A built-in steel pipe or a flexible anchor rod is arranged in the outer sleeve, and the pile tipis fixedly connected with the built-in steel pipe or the flexible anchor rod. By optimally designing the pile body, the side resistance is small during static pressure pile sinking penetration, the outer supporting blades are unfolded through secondary sinking of the outer sleeve, the vertical uplift and compression resistance bearing capacity of the outer supporting blades is improved, the horizontal bearing capacity of the outer supporting blades is improved through the arrangement of the empennage, and the uplift bearing capacity of the pile side and the blades is improved by utilizing thecharacteristics of compression shrinkage and tension expansion of negative poisson ratio materials. The method has the advantages of small soil disturbance, low construction noise and environmental friendliness.

The invention relates to the technical field of foundation pit supporting in engineering construction, and particularly relates to a construction method of a steel-reinforced concrete secant pile andan arc-shaped protective tool. The steel-reinforced concrete secant pile comprises a secant pile body composed of a plurality of meat piles and plain piles, wherein the meat piles and the plain pilesare sequentially and alternately arranged and engaged with one another. The secant pile body is completed by repeatedly mounting and dismounting the arc-shaped protective tool in pile holes of the plain piles and inserting H-shaped steel ribs into pile holes of the meat piles and pile holes of the plain piles. By the adoption of the method of inserting the H-shaped steel ribs, the rigidity and strength of the secant pile body can be improved, the pile diameter of a supporting pile is reduced, and the excavation amount and the concrete pouring amount are reduced; the H-shaped steel ribs can bepulled out to be recycled, so that the material cost is reduced, the construction period is shortened, and meanwhile environmental protection is facilitated; and the arc-shaped protective tool is placed before plain pile concrete pouring, then in-mold concrete pouring is conducted, and thus materials can be further saved.

The invention provides a precast perforated pipe pile. A perforated pipe and concrete arranged in and out the perforated pipe form a pipe body, and the outer wall of the pipe body is provided with a self-tapping screw which is a spiral bump arranged on the outer wall of the pipe body. The bottom end of the pipe body is a flat head or a tip head, and the top end of the pipe body is a multi-face column and is externally sheathed with a side limited ring. The side limited ring is in a horn shape, and foundation soil is arranged between the pipe body and the side limited ring. The preparation method of the precast perforated pipe pile comprises the following steps: the perforated pipe is manufactured by steel pipes with different specifications, and the thickness is larger than 2 mm; the aperture of perforated holes in the perforated pipe is manufactured by a cutting mode and is determined according to the grain diameter of stone in the concrete, and the distribution of the perforated holes from the pile top to the pile end is determined according to the distribution characteristics of additional stress of the pile; the spiral bump of the outer pipe of the perforated pipe is determined according to the bearing capacity of single pile and the rotational torque; and a variety of parameters of the perforated pipe precast pile are determined according to shared building load, final foundation deformation, foundation soil conditions and conditions for affecting pile sinking.

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 discloses a multifunctional comprehensive fan single-pile type foundation and a dynamic damping adjusting method thereof. The multifunctional comprehensive fan single-pile type foundation comprises a single-pile type foundation body with an operation platform, a hydraulic damper, a fixing frame and a fixing pile; the hydraulic damper is provided with a mounting position allowing the single-pile type foundation body to penetrate through; the single-pile type foundation body penetrates through the mounting position of the hydraulic damper and is fixedly connected to the hydraulic damper through the fixing frame; one end of the fixing pile is installed at the bottom of the hydraulic damper, the other end of the fixing pile is driven into a seabed to be fixed, and the fixing pile is used for fixing the hydraulic damper to the seabed; a plurality of one-way valves are arranged on the hydraulic damper, in the process of changing the internal volume of the hydraulic damper, external water can be injected into the hydraulic damper or existing water in the hydraulic damper can be discharged through the one-way valves; and meanwhile, water flow is adjusted, so that dynamic adjustment of damping is achieved, the structural stability of the single-pile type foundation is improved, and economical efficiency is improved.

The invention discloses a prestressed reinforcement rock-socketed cast-in-place pile which comprises a steel casing of the cast-in-place pile and a plurality of reinforcing steel bars, wherein the plurality of reinforcing steel bars are respectively sleeved in a steel sleeve; the lower ends of the reinforcing steel bars extend out of a closure plate; the upper ends of the reinforcing steel bars are fixedly connected with the lower side of an anchoring plate respectively; a plurality of transverse connecting pipes are communicated with the lower ends of the reinforcing steel bars respectively; the plurality of reinforcing steel bars extending out of the anchoring plate respectively are stretched one by one to form prestressed reinforcements, and the steel sleeve is fully filled with cement paste. The invention also discloses a construction method of the prestressed reinforcement rock-socketed cast-in-place pile. The method comprises the following steps of 1, preparation before embedding of the reinforcing steel bars; 2, embedding of the reinforcing steel bars; 3, concrete pouring; 4, stretching of the prestressed reinforcements; 5, filling of the steel sleeve 6 by the cement paste; 6, concrete pouring and sealing. Due to the adoption of the prestressed reinforcement rock-socketed cast-in-place pile construction method, the bending resistance of the rock-socketed cast-in-place pile can be greatly enhanced by applying prestress to the high-tensile reinforcing steel bars, the diameter of the rock-socketed cast-in-place pile is reduced, and the construction cost is lowered.

The invention discloses a construction method for reinforcing the foundation of a soft soil area. The construction method comprises the following steps of: preparing a construction facility; preparing a construction plant; measuring and lofting and the like. The construction method is a safe, economic and efficient construction method for reinforcing the foundation of the soft soil area. The method is high in on-site operability, and can be popularized easily; moreover, by the method, the construction safety and the construction quality of foundation reinforcement of a filling area beside an operation line of the soft soil area are guaranteed.

The invention relates to a composite pile structure for an iron tower of an electric transmission line. The composite pile structure comprises a pile body and pile body fastening pieces. The pile body fastening pieces are arranged on two sides of the pile body. Compared with the prior art, the composite pile structure has the advantages of shortening length of the pile body, effectively reducing horizontal displacement, saving concrete dosages, and the like.

The invention discloses a single-pile-casing construction method for a static pressure sinking pipe carrier cast-in-place pile. A static pile driver and a single pile casing can be used for manufacturing the carrier pile; carrier concrete materials are put in at a time, the construction speed is obviously increased, and energy conservation and environment friendliness are achieved; and the pulling resistance of the carrier pile manufactured through the static pile driver and the single pile casing is obviously improved. The method includes the following steps that firstly, a field is cleaned, surveying and setting out are conducted, and the static pile driver is moved to a station; secondly, the steel pile casing provided with a conical valve pile tip is pressed to the designed elevation; thirdly, concrete with the amount needed by a carrier is put into the steel pile casing at a time; fourthly, the steel pile casing is pulled upwards to be exposed out of the ground, and the space formed by upward pulling of the steel pile casing is automatically filled with the put-in carrier concrete ; fifthly, the pile tip is closed, the steel pile casing is pressed downwards, the downward pressing force and the elevation reach preset values, and the carrier concrete is compacted to form an expanded carrier; sixthly, closing is automatically relieved, pile body concrete is poured, or a reinforcement cage is firstly placed, and then concrete is poured; and seventhly, the steel pile casing is pulled out of the ground while vibration is conducted, and the pile is formed.

The invention discloses an umbrella-type supporting structure for slope prevention and control and a construction method thereof. The umbrella-type supporting structure comprises a plurality of supporting units which are arranged at intervals and soil baffles arranged between the adjacent supporting units; the supporting units comprise vertical piles, toe beams, heel beams, bracing beams and diagonal beams, wherein the toe beams and the heel beams are vertically and rigidly connected to the two side faces of the vertical piles, the bracing beams are rigidly connected between the toe beams andthe vertical piles, and the diagonal beams are rigidly connected between the heel beams and the vertical piles; and the soil baffles are arranged between the adjacent vertical piles, and included angles are formed between the bracing beams and the vertical piles as well as between the diagonal beams and the vertical piles correspondingly. The umbrella-type supporting structure can resist the larger lateral load of a soil body, and is high in deformation-resisting capacity, good in supporting effect, small in structural internal force, safe and economic.