57results about How to "Speed ​​up the consolidation" patented technology

A vacuumizing-electroosmosis-stacking combined soft-foundation consolidating system consists of telescopic water drainage electrodes, a conductive circuit, a direct-current power supply, horizontal water drainage pipes and a vacuum pump, wherein the water drainage electrodes, the conductive circuit and the horizontal drainage pipes are all arranged below a vacuum film, and the telescopic water drainage electrodes with telescopic upper ends are capable of being powered on and draining water. A vacuumizing-electroosmosis-stacking combined soft-foundation consolidating method includes the technical steps of arranging plastic water drainage plates and the water drainage electrodes, connecting the horizontal water drainage pipes and leads, paving geotextile, performing vacuumizing, electroosmosis and stacking preloading, and compressing the water drainage electrodes and the like. By the vacuumizing-electroosmosis-stacking combined soft-foundation consolidating system, the difficult problem of combination of electroosmosis, vacuum preloading and stacking preloading is solved, and three foundation treatment methods of electroosmosis, vacuum preloading and stacking preloading are combined so that the vacuumizing-electroosmosis-stacking combined soft-foundation consolidating method is particularly suitable for silt-based soft foundation with low osmotic coefficient and capable of shortening foundation treatment period and improving treatment effect greatly and is an economic and practical soft-foundation treatment method.

The invention discloses a method for increasing the foundation bearing capacity. The method is characterized in that a vacuum preloading technology and a grouting technology are organically integrated, a vacuum state is formed in the stratum of a soft soil foundation by utilizing a vacuum pump in a vacuum water draining system, the technical condition of vacuum preloading is reached through controlling the vacuum degree of the stratum, and prepared grout is grouted in the stratum in a reasonable time; on one hand, the stratum negative pressure caused by vacuum is fully utilized, the grout can be more easily permeated in the stratum within a control time, the space occupied by stratum pore water (the stratum pore water is drained due to vacuum water draining) is filled, the strength is increased after concretion consolidation, thus the bearing capacity of the soft soil foundation is effectively increased, the consolidation settlement amount caused by the vacuum water loss can be simultaneously reduced, the consolidation rate can be effectively quickened, and the processing rate can be increased; and on the other hand, the vacuum state in the stratum is utilized, thus the grout can be conveniently permeated in the stratum, and the energy consumption is reduced.

The invention discloses a structure and method for conducting reinforcing processing on a soft foundation by combining surcharge preloading and vacuum preloading. The structure comprises first woven fabric, a first pervious bed, a second pervious bed, a surcharge slurry layer, second woven fabric and a sealing film which are sequentially arranged on surface soil of a soft foundation processing region, and further comprises first long vertical drain boards, first short vertical drain boards, a horizontal branch filter tube, a horizontal master filter tube, a vacuum pump and second vertical drain boards. The first long vertical drain boards and the first short vertical drain boards are inserted into the soft foundation processing region, the horizontal branch filter tube is placed in the first pervious bed, the horizontal branch filter tube is connected with the vacuum pump through the horizontal master filter tube, and the second vertical drain boards are inserted into the surcharge slurry layer. The structure and method have the advantages that the vertical drain boards in two different lengths are inserted in the soft foundation processing region, the corresponding vertical drain boards are inserted into the surcharge slurry layer, water draining is then conducted on the vacuum condition, therefore, the solidification cycle can be shortened and the bearing capacity of the solidified foundation is high.

The invention discloses a plastic drainage device which is used in soft foundation processing and composed of a plastic drainage pipe, a base and a cloth bag. The base sleeves the bottom of the plastic drainage pipe in the integral form. With the base, flatness and verticality of the plastic drainage pipe is guaranteed, and the bottom of the plastic drainage pipe is out of extrusion and damage. The cloth bag closely covers the whole device to filter soil particles. The plastic drainage pipe is used for draining for a surface channel. Pore water enters the surface channel from the surrounding and then is drained. The method that the water is drained from the inside of the plastic pipe is replaced. More importantly, the plastic drainage pipe is in the axisymmetric structure, the pressure dissipation rule of the pore water is met, allowing the pore water to enter the plastic pipe from the surrounding and achieving good drainage effect. The plastic drainage device has the advantages such as simple structure, low cost and good effect.

The invention relates to the technical field of concrete permeable piles, in particular to a bearing permeable concrete-ECC composite precast pile and a preparation method thereof. The composite precast pile comprises an outer layer, an inner layer, a connecting piece, a drill bit and a pile top protection cap; the inner layer is of a columnar structure made of ECC concrete, the side wall of the inner layer is wrapped with the outer layer made of permeable concrete, and the upper end of the inner layer is higher than the upper end of the outer layer to form a convex part; the drill bit is fixed to the lower end of the inner layer through the connecting piece; the pile top protection cap is of a cylindrical body with a groove, and the convex part can be inserted into the groove and closelymatched with the groove. According to the composite precast pile, good bending performance is provided for a pile body through the excellent tension strain-hardening performance and ductility of the ECC concrete of the inner layer, and a certain degree of horizontal displacement of a pile head is achieved; and the permeability performance of the pile body is ensured by the permeable concrete of the outer layer, the effect of a vertical drainage channel can be achieved, so as to accelerate the dissipation of excess pore water pressure of soil, and the consolidation rate of a foundation is increased.

The invention provides a seepage draining method for a fine-grained tailing pond, a seepage draining system and application, and relates to the technical field of tailing treatment. According to the seepage draining method, a seepage draining area is defined on the beach surface of the tailing pond through adopting a floating body, a base layer and a sand wall are formed in the seepage draining area through using deposition and solidification of coarse tailings, a seepage draining body is arranged in the sand wall, and the permeability coefficient of the coarse tailings is higher than the permeability coefficient of fine tailings, so that moisture in the coarse tailings enters a water guide pipe along the seepage draining body firstly and then flows to a sub-dam drainage ditch to be drained; and a large amount of moisture is contained in the fine tailings outside the seepage draining area, the moisture in the fine tailings is gradually gathered in the seepage draining area and enters the seepage draining body along with the difference of pore water pressure inside and outside the seepage draining area, the coarse tailing sand wall is used for reversely filtering the fine tailings,and the seepage draining body is used for reversely filtering the coarse tailings, so that the seepage draining body is not easy to block by the fine tailings, seepage draining of the fine tailings isrealized, the seepage draining area and the seepage slope of a dam body are increased, and the seepage draining efficiency is improved.

The invention discloses a soft soil foundation pit dewatering device. The device comprises a plurality of water collecting wells positioned on the periphery of a foundation pit, and a steel pipe is arranged in the water collecting well in a sleeved mode; a plurality of holes are uniformly distributed in the steel pipe, and sand gravel is filled between the inner walls of the water collecting wellsand the outer wall of the steel pipe; the outer wall of the steel pipe is wrapped with geotechnical cloth, and a water pump is arranged at the bottom, close to the steel pipe, of the inner cavity ofthe steel pipe; a water pumping hole of the water pump is connected with a water pumping pipe, and a sliding groove is vertically formed in the inner wall of the steel pipe located below the water pumping pipe; and a filtering mechanism is arranged below the water pumping pipe in the steel pipe, wherein the first filter screen and the second filter screen are horizontally arranged in the steel pipe in sequence from bottom to top, the two sides of the first filtering frame are correspondingly connected with the sliding groove through the first sliding blocks, the two sides of the second filtering frame are correspondingly connected with the sliding groove through second sliding blocks, and a connecting rod is arranged between the first sliding block and the second sliding block; a second baffle rod is horizontally arranged at the top end of the sliding groove; and an elastic floating device is arranged between the top of the second sliding block and the second baffle rod.

The invention relates to a vacuum-bag-type liquid injection pressurization combined grouting reinforcement super-soft soil foundation treatment method. Equipment adopted comprises a drainage system and a liquid injection pressurization system. The liquid injection pressurization system comprises liquid injection pressurization bags 10, transverse liquid injection pressurization branch pipes 6, water injection valves 4, tee couplings, a transverse liquid injection pressurization main pipe 13 and liquid injection pressurization equipment 1. The liquid injection pressurization bags 10 are made of elastic materials capable of transmitting liquid pressure. Liquid injection sealing openings 5 are formed in the tops of the corresponding liquid injection pressurization bags 10, and the two sides of the upper portions of the liquid injection pressurization bags 10 communicate with water injection pipes 11 and are further connected to the transverse liquid injection pressurization branch pipes 6 through the water injection pipes 11. The water injection valves 4 are arranged on the transverse liquid injection pressurization branch pipes 6. Vertical drainage plates 9 are distributed on the peripheries of the liquid injection pressurization bags 10. The treatment method includes the following steps of (1) equipment arrangement and communication, (2) a vacuum liquid injection pressurization stage and (3) a grouting pile body forming stage.

The invention discloses a comprehensive treatment method of a soft foundation. The comprehensive treatment method comprises the following steps of firstly, designing and constructing vibro-replacement stone columns; secondly, designing, distributing and precipitating a drainage system for vacuum well points among the columns; thirdly, designing and constructing a broken stone hardcore; fourthly, designing and constructing low-energy dynamic consolidation; fifthly, leveling the broken stone hardcore. The comprehensive treatment method disclosed by the invention is a novel comprehensive treatment method of the soft foundation, which is formed by organically combining four foundation treatment techniques of vibro-replacement stone column, vacuum well point precipitation, a hardcore method and dynamic consolidation on the basis of the characteristics of a soft soil layer, and is great in treatment depth and improvement amplitude of foundation bearing capacity, and has technical and economic advantages of great improvement amplitude of the foundation bearing capacity, low construction cost and good treatment effect.

The invention discloses a foundation treatment method based on dynamic accurate control on nonuniform settlement. The method comprises the steps of (1) prefabricating a permeable pile, wherein a pile body is a hollow pipe pile; (2) connecting a pipe cap with a drain pipe, connecting the pipe cap with the prefabricated permeable pile hermetically, and driving the pile body to a position below the ground water level of a foundation; (3) dividing a treatment area of the foundation into unit areas, and configuring a vacuum draining pump for each unit area; (4) arranging a vacuum pipe network, ditching on the spot to bury all pipe sections into the foundation, and connecting an external interface with the vacuum draining pump; (5) arranging a mattress layer between a composite foundation and a base; (6) building the base, and then performing construction of an upper structure; (7) when nonuniform settlement of the foundation appears during building settlement, controlling the vacuum degree of different unit areas in the foundation by using the unit areas divided in the step (3) and the configured vacuum draining pump. By adopting the foundation treatment method disclosed by the invention, the settling amounts of different areas of the foundation are accurately controlled, and problems caused by nonuniform settlement are solved.

The invention discloses a seepage drainage system of a tailing dam. The seepage drainage system comprises two layers of geomats and a vacuum seepage drainage pipe, wherein the two layers of geomats are stacked up and down, a layer of geotechnical fabric wraps each layer of geomat, the vacuum seepage drainage pipe is laid between the two layers of geomats, a plurality of drain holes are formed in the vacuum seepage drainage pipe, the vacuum seepage drainage pipe is connected with a vacuum pump, an upper coarse tailing layer is laid on the geotechnical fabric wrapping the geomat at the upper layer of the two layers of geomats, and a lower coarse tailing layer is laid on the geotechnical fabric wrapping the geomat at the lower layer of the two layers of geomats. The vacuum seepage drainage pipe is sandwiched between the geomats, and the coarse tailing layers are laid outside the geotechnical fabric, and thus, physical clogging of fine particles in tailings on seepage drainage facility andcalcification chemical clogging around the seepage drainage pipe can be prevented; and vacuum sucked negative pressure is combined with positive pressure to perform seepage drainage, the seepage drainage influence radius can be expanded, the hydraulic gradient of the seepage drainage path is improved, seepage drainage of fine particle tailings is accelerated, the seepage drainage efficiency is improved, and the safety and the stability of the dam are promoted.

The invention discloses a waste mud dehydration and solidification treatment method which adopts a multi-layer vacuum treatment method, and a plurality of layers of horizontal plastic drainage platesand a plurality of rows of vertical plastic drainage plates are laid in a mud pit, so that the problem of insufficient lower-layer mud treatment effect is solved, and the solidification speed is increased; multi-layer horizontal drainage can be achieved only by filling slurry and precipitating in batches, multi-layer vacuum is formed in the slurry through the multi-layer horizontal drainage system, the drainage path is shortened, and the drainage effect is better; moreover, the flocculating agent is also adopted, so that the vacuum dehydration effect and the solidification speed can be improved, meanwhile, a curing agent is added, soil solidification is realized while vacuum dehydration is performed, and further treatment is not needed; by adopting the method, the treatment speed of the waste mud can be rapidly increased, and the curing effect of the waste mud is enhanced.

The invention relates to a surface-layer fast solidification method for a soft foundation with dredger soil. The surface-layer fast solidification method includes steps of delimiting a construction region with the certain area and erecting a safe construction channel on the periphery of the construction region; laying two layers of non-woven fabrics on a soil surface in the construction region; building a shallow-layer water drainage plate; then distributing filter tubes among the non-woven fabrics to be used as water drainage channels and connecting submersible type vacuum pumps onto the filter tubes to realize vacuum water drainage; laying plastic membranes on the tops of the upper-layer non-woven fabrics to be used as air closure membranes; observing settlement on the membranes in a vacuum water drainage process and draining water accumulated on the membranes in time; using vibrators on the air closure membranes in good time to increase vibration load in the middle of a water drainage solidification period, and wrapping non-woven fabrics on the vibrators to realize membrane protection during vibration; and completing surface-layer solidification after bearing capacity of the solidified soil reaches 50Kpa or meets designed requirements. By the aid of the method, a work period can be shortened, work procedures such as work cushioning and the like are omitted, waste recovery of the soil is realized, solidification speed is fast, an effect is good, and assembly line production can be realized.

The invention discloses a device for moulding and forming a drilled hole wall. The device for moulding and forming the drilled hole wall comprises a slurry bin, an expansion mechanism and a connecting mechanism, wherein, the slurry bin is positioned at the lower end of the device; the lower part of the slurry bin is provided with a one-way valve; a piston seat is arranged on the upper part of an inner cavity and is sealed with the inner wall of the slurry bin; the expansion mechanism is positioned on the middle part of the device and comprises a hollow core bar and an expansion pipe which is sleeved on the outer side of the hollow core bar; the lower part of the expansion pipe is tightly pressed through a lower pressure pipe; the upper end and the lower end of the lower pressure pipe are in threaded connection with the core bar and the slurry bin; the upper part of the expansion pipe is tightly pressed by an upper pressure pipe, and the upper pressure pipe is sleeved on the core bar; the connecting mechanism is positioned on the upper part of the device and comprises a hollow upper joint which is in threaded connection with the upper end of the core bar; the upper joint is provided with an inner thread which is connected with a drill rod; and radial small holes which are communicated with the inner cavity of the expansion pipe are formed on the core bar. The device for moulding and forming the drilled hole wall has the characteristics of low cost, good supporting effect, high supporting speed, and high safety and reliability; the device is connected with hole walls well, and the formed hole walls are high in elastoplasticity; and the device slightly abrades the drill rod and facilitates subsequent drilling operation.

The invention discloses a low-water-level inverted siphon precipitation vacuum and surcharge united preloading reinforcement deep soft foundation system. The low-water-level inverted siphon precipitation vacuum and surcharge united preloading reinforcement deep soft foundation system comprises a soft soil foundation, a surcharge, plastic drainage boards, water absorption pipelines, precipitation wells, a filter cloth, a sand bed, a sealing film, a vacuum pump, a water drawing pit, a water drawing box and a centrifugal pump. According to the low-water-level inverted siphon precipitation, vacuumand surcharge united preloading reinforcement deep soft foundation system disclosed by the invention, a low-water-level inverted siphon precipitation vacuum and surcharge united preloading reinforcement deep soft foundation method is adopted, a low-water-level design idea of the vacuum water drawing box is provided, an idea of inverted siphon is combined to enable the zero point of the water level of the system to move downwards, so that the underground water level of the reinforcement site is effectively reduced; the inverted siphon effect is formed between the precipitation wells and the water drawing box, so that the underground water level of the site is reduced by the system, and vacuum pressure of lied soft soil can also be substantially increased; the ground stabilization to the deep soft soil is greatly improved by the processing method, duration can be shortened, and construction maintenance cost is reduced; and the method is simple in technology, and convenient to implement,and can be used for practical engineering.

The invention relates to an ultrasonic vibrating vacuum preloading test method. A system used by the ultrasonic vibrating vacuum preloading test method comprises a model box for accommodating a test soil sample, wherein water draining plates are inserted into the test soil sample; the water draining plates are connected with a hose through water draining plate-steel wire hose adapters; the hose isconnected with a water and gas separating tank equipped with a vacuum pressure gauge; the water and gas separating tank is connected with a vacuum pump through a hose and a control valve; the water draining plates are ultrasonic vibrating water draining plates; ultrasonic transducers connected with an ultrasonic generator are fixed to the water draining plates. By the ultrasonic vibrating vacuumpreloading test method, clogging of the water draining plates can be effectively prevented, the consolidation rate of vacuum preloading drainage is increased, the dissipation of pore water pressure isaccelerated, and the soil reinforcing effect is improved.

The invention relates to an ultrasonic vibration device used for vacuum preloading testing. The ultrasonic vibration device is used for a vacuum preloading testing system with a drain board, and the ultrasonic vibration device is characterized in that the ultrasonic vibration device comprises an ultrasonic generator and an ultrasonic transducer, the ultrasonic transducer is fixed to the drain board of the vacuum preloading testing system, and the ultrasonic generator is connected with the ultrasonic transducer. By means of the ultrasonic vibration device, clogging of the drain board can be effectively prevented, the vacuum preloading drainage consolidation rate is improved, pore water pressure dissipating is accelerated, and the soil stabilization effect is improved.