763 results about "Immersed tube" patented technology

The invention discloses a grouting pile of a plastic sleeve for strengthening a soft soil foundation and a pile-forming strengthening construction method thereof. The pile consists of a pile cap, a thread sleeve, an earthwork cloth, a joint, a pile body and a pile tip; the top of the sleeve is connected with the pile cap and the bottom of the sleeve is connected with the pile tip, the side wall of the sleeve is provided with an opening hole, the outside of the sleeve is packed by the earthwork cloth, each section of the sleeve is connected by the joint, and the sleeve is filled with granules and grouted with slurry inside so as to form the pile body and a pile periphery as a slurry spreading zone. The pile-forming strengthening method comprises: connecting the sleeve to the depth of the pile length by the joint and then to the pile tip, placing the sleeve and the pile tip into an immersed tube together, beating the sleeve into a foundation by a beating machine, leaving the sleeve and the pile tip in the foundation, feeding the granules into the sleeve and grouting the sleeve to form a slurry scattered material column, spreading a slurry liquid on the pile periphery to form a spreading zone under the grouting pressure or expanding the earthwork cloth outwards to form a gourd pile body, pouring the pile cap on the pile top, and paving a reinforced material and a gravel cushion after the pile body and the pile cap are dried so as to form a composite foundation. The pile type can strengthen the contact action between the pile and the soil, can improve the bearing capacity of the pile body greatly, and is an ideal pile type for strengthening the soft soil foundation.

The invention relates to a multi-section expansion screw pipe-deposition post, which is formed by inner pipe, outer pipe, upper and lower bow compression arms, axial pin, cylinder, hydraulic motor, vibrator and a cement head. First, entering said device into ground via vibration and rotation; lifting the steel cage into pipe; filling concrete; connecting the cylinder on the upper end of pipe to be expanded; vibration lifting the pipe to a preset height to be expanded; calling back it to be lifted and expanded again; calling it back and filling concrete and lifting the pipe from the hole to from several pipe-deposition post with multi-expanded head and multi-branch. The invention can fully utilize the bearing ability of soil, and the multi-section expanded head has strong strength of post, big distance between posts and less posts. Since the outer pipe with bigger outer diameter and the screw blades can discharge the soil, it can solve the soil-compression effect to confirm the operation quality with improved working efficiency, reduced cost and non-noise.

The invention relates to a plastic sleeve concrete pile and a construction method thereof. the plastic sleeve concrete pile comprises a cover board, plastic sleeves, pile tips, concrete and sleeve joints, wherein the top of each plastic sleeve is connected with the cover board and the lower part is connected with each pile tip, every two plastic sleeves are connected by the sleeve joint, and the concrete is poured in the plastic sleeves. The construction method comprises the following steps: connecting the prefabricated pile tips with the plastic sleeves, pulling the plastic sleeves together with the pile tips into an immersed tube after lifting the immersed tube at a certain height, starting a plastic sleeve concrete pile driver to drive the plastic sleeves with the pile tips together into the pile length designed depth, lifting the immersed tube after filling water into the plastic sleeves until 1/2-2/3 of pile length but remaining the plastic sleeves and the pile tips into the foundation, pumping filled water in the plastic sleeves, and pouring a concrete pile body and the cover board into the plastic sleeves to be made into the plastic sleeve concrete pile. The plastic sleeve concrete pile has small soil extrusion action, uneasy broken pile, flexible and rapid construction, easy control of pile body quality, higher bearing capacity of single pile and good cost performance; and the pouring is not influenced by outside.

The invention relates to a cloth bag squeezing concrete branch pile. The bottom of a branch pile body is connected with a prefabricated pile point, the pile body is composed of a concrete stiffness core, a reinforced body, a geotechnical cloth bag slurry pressing body, a geotechnical cloth bag, a branch squeezing cloth bag slurry pressing body, branch squeezing cloth bags and a cement soil pile from the inside to the outside. The branch squeezing cloth bags are arranged on a geotechnical cloth bag body at intervals. The geotechnical cloth bag slurry pressing body is formed by injecting slurry into the geotechnical cloth bag in a high-pressure mode, and the branch squeezing cloth bag slurry pressing body is formed by injecting slurry into branch squeezing cloth in a high-pressure mode. The reinforced body is composed of a vertical main rib and an annular hoop rib. A geotechnical cloth bag connecting body, a reinforced body vertical main rib connecting body and a limit groove of an immersed tube are sequentially arranged on the top face of the prefabricated pile point from the outside to the inside. By means of the pile, rigid and flexible compound pile effects are achieved, damage of a soil squeezing effect on concrete and mortar which are not initially set is reduced, and pile quality is guaranteed. In addition, common loading performance of flexible piles and rigid piles is improved by means of the branch pile.

The invention discloses a vibration immersed tube compaction pile model test device and a test method. The vibration immersed tube compaction pile model test device is characterized by comprising a transparent model groove, transparent soil for simulating soil around a pile and an immersed tube with pile shoes are arranged in the transparent model groove, a grouting pipe is arranged in the center of the immersed tube, and a pile sinking mechanism mounted on a support is arranged above the transparent model groove. A laser source is arranged on one side outside the transparent model groove, digital cameras capable of observing a transparent model groove space are arranged on a front view face and a top view face of the outside of the transparent model groove, and the digital cameras are connected with a processing device through data lines. The vibration immersed tube compaction pile model test device is easy and convenient to operate and high in repeatability; the prepared transparent soil and natural soil are good in soil nature similarity; according to the test method, the squeezing effect of a vibration immersed tube compaction pile under the conditions of different natures of the soil around the pile, different immersed tube section forms, different pile diameters and different pile lengths can be observed and measured in a visual mode; the vibration immersed tube compaction pile model test device and the test method have important significance in design and construction for guiding influences on surrounding buildings by pile-forming construction of vibration immersed tube piles.

The invention discloses a tube section joint fire-protection structure for an immersed tube tunnel and a construction method. The tube section joint fire-protection structure comprises a first protection component and a second protection component. The first protection component is a rigid structural component; and one end of the first protection component is used for being fixed to one side of the end of a first tube joint, and the other end of the first protection component is used for being movably connected to one side of the end of a second tube joint. The second protection component is a flexible structural component; and one end of the second protection component is used for being fixed to one side of the end of the first tube joint, and the other end of the second protection component is used for being fixed to one side of the end of the second tube joint. According to the construction method, the second protection component is mounted in the first place, and then the first protection component is mounted. According to the fire-protection structure for the immersed tube joints, two joint fire-protection structure bodies which combine rigidity and flexibility are formed through the first protection component and the second protection component; effectiveness and reliability of fire protection and heat insulation achieved during the operation period can be effectively improved; furthermore, the tube section joint fire-protection structure can be flexibly adapted to deformation of the tube section joints; during the construction period and the operation period, the tube section joint fire-protection structure can play the effective protection role for tube sections; and the construction method for the fire-protection structure for the tube section joints is simple, safe and efficient.

The invention relates to a crushed rock pile used for strengthening an extremely soft soil foundation and a construction method thereof, capable of effectively controlling filling quantity of crushed rock filler so as to reduce the foundation strengthening construction cost. The crushed rock pile comprises a net barrel (10) which vertically extends to a foundation supporting layer or design elevation and crushed rock filler (20) which is filled in the net barrel (10) densely, wherein the circumference of the net barrel (10) is provided with a grid structure, and the grid size of the grid structure is smaller than the grain size of the crushed rock filler (20). The construction method comprises the following steps of: mounting a pile head (30) at the lower end of an immersed tube, placing the net barrel (10) in the immersed tube; filling the crushed rock filler (20) into the net barrel (10); acting on the immersed tube by adopting static pressure or vibrating equipment so that the immersed tube is immersed into soil and reaches the foundation supporting layer or the design elevation; and vertically lifting the immersed tube upward until the immersed tube is pulled out of a pile hole. By adopting the crushed rock pile and the construction method provided by the invention, the crushed rock filler can be prevented from radially spreading outside a pile, so that the crushed rock filling quantity is bassically consistent with the volume of the pile body of the crushed rock pile, thereby well exerting the advantage of low manufacturing cost of the crushed rock pile.

The invention relates to a cement mixing pile with a stiffness core capable of draining and pre-pressing firstly and then grouting as well as a construction method thereof. The cement mixing pile comprises a vertical draining and grouting pipe arranged in the cement mixing pile, and more than one dual-layer telescopic horizontal draining and grouting pipes arranged at intervals on the vertical draining and grouting pipe, wherein a bulk solid pile with the stiffness core is arranged in the cement mixing pile, and the length of a horizontal draining and grouting pipe in an outer layer is smaller than that of the horizontal draining and grouting pipe in an inner layer when the horizontal draining and grouting pipe is in a telescopic state. In a construction process, an upper drawn steel immersed tube is vibrated, and the horizontal draining and grouting pipe departs from the steel immersed tube and is stretched to form a horizontal draining body. According to the invention, the advantages of drainage consolidation and composite foundation methods are integrated, and foundations can be dynamically reinforced according to the construction period and the settlement requirements on the premise of lower construction cost while the bearing capacity and the processing depth of the cement mixing pile are increased.

The invention relates to the field of tunnel construction, in particular to a template system used for overall pouring of a large-area tunnel immersed tube. The template system used for overall pouring of the large-area tunnel immersed tube comprises a bottom die, side dies, an inner die, an end die and a hydraulic drive system, wherein the hydraulic drive system drives the bottom die, the side dies and the inner die to move, be released and reset. The template system used for overall pouring of the large-area tunnel immersed tube improves the production efficiency of pouring of the immersed tube, improves the manufacturing precision of the immersed tube, can effectively avoid resource waste in the process of manufacturing of the immersed tube, and saves the production cost.

The invention provides a high-frequency hydraulic vibratory construction method for a cement-soil core-inserted combined pile. The high-frequency hydraulic vibratory construction method is a foundation reinforcing method, and includes forming a hole in a soil squeezing mode by a traditional immersed tube or drilling a hole by long spiral equipment, and filling stirred cement-soil mixtures into the drilled hole to for a pile; or directly forming a cement-soil pile by a stirring pile machine, immersing a rigid core pile into the uncured cement-soil pile by a high-frequency hydraulic vibratory hammer after cement-soil forms the pile, and forming the novel pile comprising the cement-soil pile and the core pile which jointly bear load. Compared with the prior art, the high-frequency hydraulic vibratory construction method has the advantages that the construction speed is high, the noise and the manufacturing cost are low, pollution is prevented, the quality of the formed novel pile is stable, and the formed novel pile is high in load bearing capacity. Besides, the construction efficiency is ten times of that of a common piling machine, the cost is saved by about 30% to 50% as compared with a precast pile, and is saved by about 40% to 50% as compared with a drilled grouting pile, and the high-frequency hydraulic vibratory construction method has substantial social and economical benefits.

The invention relates to a method for measuring the flexural rigidity of an immersed tube tunnel joint. The method comprises the following steps: 1, applying an axial external water pressure N0 to the immersed tube tunnel joint as an external force applied to a position having a distance of an initial eccentric throw e0 to the neutral axis of the immersed tube tunnel joint; 2, continuously applying prestressed cable pretensions T1 and T2 to the immersed tube tunnel joint; 3, measuring the displacement S0 and the corner theta of a GINA waterstop under the action of N0, T1 and T2; 4, using an immersed tube tunnel joint structure simplification model established by a steel plate and a spring element to calculate the compression amount SF1 and SF2 of the GINA waterstop, the prestressed cable extension amount ST1 and ST2 at a top board and a bottom board, the pressures F1 and F2 of the GINA waterstrop of the top board and the bottom board, and the pulling forces T1 and T2 of the prestressed cables of the bottom plate; and 4, calculating according to a force balancing equation to obtain the flexural rigidity Ktheta of the joint. Compared with the prior art, the method provided by the invention improves the design level and efficiency of the performance of the immersed tube tunnel joint.

The invention relates to the field of immersed tube tunnels, in particular to a movable reinforcement cage binding jig, which comprises a plurality of sliding tracks, an outer jig and an inner jig, wherein the sliding tracks are arranged in parallel, the outer jig is fixed out of a reinforcement cage, the inner jig is arranged in the reinforcement cage and is positioned on the sliding tracks, and the inner jig can move along the sliding tracks. The inner jig and the reinforcement cage of the movable reinforcement cage binding jig are arranged on the sliding tracks and can be removed and conveniently moved, the movable reinforcement cage binding jig is suitable for factory large-sized prefabricated parts, and a movable jig structure which can be quickly installed and removed is adopted, so that the work efficiency and the precision of binding the reinforcement cage are improved.

The invention discloses an immersed tube drainage structure, and further discloses a method for handling suddenly-produced foundation pit water bursting and fountains through the immersed tube drainage structure. When the water bursting phenomenon obviously occurs in a foundation pit and mud is sprayed out, landfill is conducted through original soil within the range of a core tube which has been dug, and then well digging and water pumping are conducted. A plurality of wells are formed for the core tube, and shaft bottom elevations are reduced till the shaft bottom elevations are below the natural ground and extend into high-water-content layers; after formation, a submerged pump is placed in each well to conduct water pumping; the upper openings of the wells are connected to form a water pumping network so that underground water can be pumped to a drainage system on the upper edge of the foundation pit; digging is continued after water inside the well is lowered below the foundation bottom elevations of the core tube; in the digging process, water pumping systems of the water pumps keeps working, blinding concrete pouring is conducted instantly after earth excavation conducted on the portions is completed; after pouring, the water pumping systems of the water pumps in the wells stop working after the raft foundation concrete pouring is completed and the strength reaches 75% of the designed strength. The drainage construction method is simple in process, and construction cost of foundation pit drainage construction can be effectively reduced.

The invention provides a pile machine special for an immersed tube pressure filling pile and a method of using the pile machine to conduct concrete pressure filling construction and reinforcing cage post inserting construction. The pile machine special for the immersed tube pressure filling pile is provided with a concrete pressure filling system and a reinforcing cage post inserting system, uses a hollow vibratory hammer, and is provided with an inner hammer. According to the pile machine special for the immersed tube pressure filling pile and the method of using the pile machine, the quality of the concrete pressure filling construction and the quality of the reinforcing cage post inserting construction can be guaranteed, the application range of the immersed tube pressure filling pile is enlarged, and good economic benefit and technological benefit are achieved.

The invention relates to a strength-core composite pile and a construction method. The outer periphery of the pile body is a granular pile, and a high-bonding strength pile core is arranged in the center of the granular pile. The construction method comprises the construction of the granular pile by the vibrating tube sinking method, and then driving the pile core with high bonding strength by the vibrating tube sinking method in the center of the granular pile. The invention can effectively reduce foundation deformation, enhance strength and rigidity of foundation soil, accelerate drainage and consolidation of soft soil, and prevent foundation soil from liquefying.

The invention discloses a construction technique for conveying an immersed tube for a long distance with a self-propelling-type semi-submersible boat, and the construction technique is used for conveying the immersed tube from an immersed tube prefabrication factory to a foundation trench zone for assembly construction of the immersed tube. A first immersing operation zone is arranged in a temporary mooring zone of the immersed tube prefabrication factory; a second immersed operation zone is arranged beside the foundation trench; the immersed tube and an immersed tube assembly boat are loaded on the self-propelling-type semi-submersible boat at the temporary mooring zone and are conveyed to a turning zone; the immersed tube assembly boat and the immersed tube are unloaded in the second immersed operation zone; the immersed tube is floating-conveyed to the foundation trench zone for assembly construction of the immersed tube by tugs and the immersed tube assembly boat; and a mooring fitting-out zone does not need to be arranged beside the foundation trench, so that time and economic investment during previous preparation work is greatly reduced, and construction work efficiency is improved.

The invention discloses a full-automatic monitoring, early warning, temperature control, moisturizing and curing system for prefabricated immersed tube sections. The system comprises a curing shed, a temperature moisture control system, a spraying system and an automatic control main machine, wherein the curing shed consists of a folding curing shed arranged in a prefabricated workshop and a fixing curing shed arranged outside the prefabricated workshop. The invention relates to a temperature control, moisturizing and curing system for prefabricated immersed tube sections, the system integrates the functions of temperature and moisture detection, early warning and automatic adjustment of ambient temperature and moisture, the immersed tube sections are subjected to heat preservation, moisture preservation and curing within 14 days after the concrete is poured in the immersed tube sections, and the curing method has incomparable advantages in curing effectiveness and timeliness against conventional curing methods.

The invention relates to the technical field of immersed tube prefabrication construction, in particular to a dry dock sequential method full-section integral immersed tube prefabrication formwork system. The system comprises an inner mold system, an outer mold system and an end mold system, wherein the inner mold system is located on the inner side of an immersed tube casting space and is connected with the outer mold system located outside the immersed tube casting space into a whole through the end mold system positioned at the longitudinal end part of the immersed tube casting space, the lower end of the inner mold system is provided with an inner mold travelling support device which is used for carrying out longitudinal, transverse and vertical position adjustment on the inner mold system, and the outer mold system is an outer side formwork structure capable of being adjusted in the longitudinal direction, the transverse direction and the vertical position. The immersed tube prefabrication method has the advantages of being accurate in position adjusting, less in main body structure damage and capable of operating all weather, so that the technical problems of sequential prefabrication, adjacent operation, compact space, longitudinal long-distance travel of an ultra-large super-heavy formwork is long, being prone to deviation and the like which occur to a sequential methodare solved.

The invention relates to a construction method for an immersed tube compaction cast-in-place concrete pile in the construction in a pebble bed, a puddingstone bed, a sand bed, and a strong weathered mudstone. Double casing pipes are hammered, simultaneously, the inner pipe is extracted from the stratum, then concrete is cast into the outer pipe, the inner pipe is positioned into the outer pipe and presses the surface of the concrete, then the outer pipe is pulled up at uniform speed, and the formation of the cast-in-place concrete pile is completed. Earth is not carried out when the hole is formed, therefore the degree of compaction of the earth among the piles is greatly enhanced, simultaneously, when the pile body concrete is cast, no hole collapse phenomenon of the outer pipe appears in the hole, even slurry wall protection is not required to be adopted, in addition, no bottom settlings exists at the bottom of the pile, thereby the characteristic that the bearing capacity of a single pile is high is ensured, and the invention has the advantages of no pollution on site and quick construction speed.

The invention discloses a construction pile foundation project and a method for constructing the same, in particular a method expanding bottom and forming pile by immersed tube. The method comprises the following steps that: an immersed tube with a metal pile head is pressed into a firm ground layer to a designed elevation; the metal pile head is taken out, soil body is burst by detonators, and then is absorbed; a bottom is expanded by a bottom expansion device, after a base cavity is formed at the bottom, the soil is taken out by an air absorption soil device; radial reinforcing steel bars are put into the base cavity and are hammered into the firm ground, the concretes which are prepared well on the ground are poured into the base cavity to form a concrete base; a prefabrication steel concrete pile body which is put into the concrete base and a cast-in-place concrete base are butt jointed and anchor fixed to form a whole through inserted reinforcing steel bars at the bottom of the concrete base; the immersed tube is pulled out, and a pile is formed. Compared with the prior art, the invention which uses the technical proposal has the advantages that: the process method is simple and advanced, the shape of the bottom expansion cavity is regular, soil is cleanly taken out without granular loose soil and the efficiency is high, thereby the bearing capacity of the single pile is effectively improved and reaches the designed specification, the quality of pile foundation project is ensured, the construction cost is lowered, the utilization ratio of the material strength is improved, the pile can be operated in the most economic condition and the constructing security is improved.