32 results about "Plaggen soil" patented technology

The invention discloses a compound solidifier for mucky soil, which includes, by weight, 46% of cement, 34% of slag, 15% of fly ash, and 5% of triethanolamine. In the invention, cement is used as a main solidifying material, the fly ash and the slag are used as alkaline activators, and the triethanolamine is used as a surfactant. The compound solidifier, on the basis of solidification mechanism, aims to increase pH value of soil body, promote procedure of hydration reaction of cement and setting and hardening of a hydrate, and enhance activity of ions participating in the reaction; by selecting the solidifying material and other components, the optimal solidification effect is achieved through a series of reactions. The invention also provides applications of the compound solidifier for mucky soil in solidification treatment of soft soil foundation. In practical engineering, addition amount of the compound solidifier is regulated so as to fit and solidify soft soil in different organic matter content and water content, thereby achieving best solidification and economic effect.

The invention provides a method for carrying out dynamic compaction composite treatment on a sludge soil foundation through gravel piles, a drain board and an upper filling body, and belongs to the technical field of building foundation treatment. The method comprises the steps that S1, a construction cushion layer is laid; S2, construction of the gravel piles is achieved, and a vibration sunken tube method is adopted; S3, geotechnical cloth and a cushion layer below the tops of the gravel piles are laid; S4, construction of the plastic drain board is achieved; S5, an upper cushion layer and geotechnical cloth are laid; and S6, layered and staged dynamic compaction of the filling body is achieved. By means of the method, the advantages of preloading and dynamic compaction dynamic consolidation of the gravel piles and the plastic drain board are achieved fully, the advantages are complemented, and the defects of a single foundation treatment method are avoided.

The invention relates to the technical field of soft soil solidification, in particular to a soft soil hardening agent for a sea area environment, which comprises the following components in parts by weight: 20-40 parts of cement, 8-12 parts of ground fly ash, 34-50 parts of slag powder, 13-15 parts of gypsum and 3-5 parts of an early strength activator. The soft soil hardening agent is suitable for soft foundation treatment processes of deep mixing piles, high-pressure jet grouting piles and the like in a sea area environment, marine silt and mucky soil with high water content, high organic matter content and high salt content are solidified, and compared with traditional cement, the soft soil hardening agent has better gelling property and economic value; and the soft soil hardening agent has the advantages of simple production process, low cost, wide raw material source, environmental protection and the like.

The invention discloses a mucky soil dehydration device vehicle and a using method thereof. The mucky soil dehydration device vehicle comprises a sludge treatment vehicle body, a curing chamber and afilter pressing chamber are arranged on the sludge treatment vehicle body, the filter pressing chamber is located at the lower end of the curing chamber, the upper end of the curing chamber is connected with a sludge inlet pipe, an opening is formed in the bottom of the curing chamber, the curing chamber is communicated with the filter pressing chamber, a storage barrel is connected to one side ofthe curing chamber, a second motor is arranged at the lower end of the curing chamber, and a connecting shaft is arranged on the inner wall of the curing chamber. According to the mucky soil dehydration device, sludge is added into the curing chamber, a curing agent in the storage barrel is added into the sludge, then the sludge is stirred by stirring blades, so that the sludge is cured firstly,the sludge and sewage are preliminarily filtered through a first filter screen plate, finally, the sludge and the sewage are subjected to filter pressing through cooperation of a pressing plate and asecond filter screen plate, drying is conducted through a heating pipe while filter pressing treatment is conducted, so that the filter pressing efficiency is improved, and the sludge treatment work is accelerated.

The invention discloses a pile casing device for brine stratum mucky soil cast-in-place pile construction, which comprises a pile casing head, a fixed transverse plate and an outer pile casing body, the upper surface of the pile casing head is fixedly connected with the fixed transverse plate, the lower surface of the pile casing head is fixedly connected with the outer pile casing body, and reinforcing ribs are fixedly arranged on the outer surface of the outer pile casing body. The number of the reinforcing ribs is four, a plurality of first through holes are fixedly formed in the outer surfaces of one sides of the reinforcing ribs, a partition plate is fixedly arranged on one sides of the first through holes, a plurality of second through holes are formed in the partition plate, and the second through holes correspond to the first through holes in position. The outer pile casing body, the first inner pile casing body and the second inner pile casing body are arranged, so that the phenomena that a pile body deflects, a pile hole shrinks, collapses and even cannot be formed easily in the drilling process when a sludge layer is thick or located in a middle layer are effectively avoided, a mud wall protection process is avoided, and pollution to underground soil and water is completely eradicated.

The invention relates to the technical field of building construction, and discloses a foundation pit reinforcement construction method for a mucky soil layer, which is used for improving the stability of a foundation pit in a foundation pit construction process. The foundation pit reinforcing construction method for the mucky soil layer comprises the steps that firstly, cement mixing piles are constructed; step 2, constructing a cast-in-situ bored pile; step 3, underground diaphragm wall construction; step 4, precipitation well construction; and fifthly, the foundation pit is excavated. And foundation pit reinforcement construction is conducted through an enclosure structure formed by the cement mixing piles, the cast-in-situ bored piles and the underground continuous wall and a dewatering well drainage system.

The invention discloses a tunneling method of an EPB-TBM dual-mode tunnel boring machine composite stratum. The tunneling method is characterized in that in terms of water-rich sandy soil with a stratum of 18.8-21.4 meters in buried depth, silt soil with a stratum of 21-23.5 meters in buried depth, sludge and muddy soil with a stratum of 23.8-24.4 meters in buried depth and an upper-soft and lower-hard stratum of 23 meters in buried depth, a tunnel boring machine is in an EPB mode and adopts a soil pressing balance mode for tunneling; in terms of tunneling on a hard-rocky stratum, the tunnel boring machine is in a TBM mode and adopts an open mode for tunneling; in terms of an upper-soft and lower-hard with a stratum of 16 meters in buried depth, the tunnel boring machine is in the EPB modeand adopts the soil pressing balance mode for tunneling; and in terms of soft rock with a stratum of 16 meters in buried depth, the tunnel boring machine is in the EPB mode and adopts a half-open mode for tunneling. According to the tunneling method, ground settlement or bumping amount can be decreased to the greatest extent, the tunneling efficiency can be ensured, and construction risks and engineering investment are reduced.

The invention discloses a foundation structure of a soft soil stratum and a construction method thereof, and relates to the field of foundation construction. The problems that high backfill soil and adeep soft muddy soil foundation are poor in stability, and foundation settlement and differential settlement are difficult to control are solved. According to the construction method, small holes aredistributed in the pile periphery of a prefabricated pipe pile in a staggered mode at will, pre-buried barbs are arranged at the small holes, the prefabricated pipe pile is sleeved with geotextile tobe implanted into a soft soil layer, water in soil around the pile permeates through the geotextile and enters an inner pipe from the small holes to be pumped out, after drainage consolidation, the geotextile is torn off, soil around the prefabricated pipe pile enters the pipe through the small holes in the side surface of the prefabricated pipe pile, then foundation soil is backfilled in the pipe of the prefabricated pipe pile, a pile cap is cast in place at the top end of the prefabricated pipe pile, and a first reinforced layer, a cushion layer, a second reinforced layer and a soil fillinglayer are sequentially laid on the pile cap. According to the foundation structure, the foundation bearing capacity of a coastal soft mudflat area can be effectively improved, the filling load borneby soil between piles is small, filling settlement is reduced, and the construction period is effectively shortened.

The invention discloses a stratum cast-in-situ bored pile with a soft upper part and a hard lower part. The stratum cast-in-situ bored pile comprises a foundation, a strongly weathered granite layer,coarse sand, silty clay, mucky soil, a formed hole, a sleeve, a drill rod, drill teeth, a down-the-hole hammer, a reinforcement cage, vertical reinforcements, connecting reinforcements and a concretefilling mechanism. The stratum cast-in-situ bored pile has the beneficial effects that the drill rod and an outer side sleeve are used for double-combination drilling, an outer side sleeve protectionwall facilitates continuous soil discharging of the drill rod, the overall rigidity is high, the drilling force is large, the hole forming precision is high, the drill rod and outer side sleeve can adapt to powerful drilling of various complex stratums and is suitable for construction of various construction methods, a mud protection wall is replaced with the sleeve following protection wall in the drill rod drilling process, environmental pollution caused by slurry can be reduced conveniently, drilling is conducted through double combination of a drill rod drill bit and the outer side sleeve,hole forming can be achieved conveniently and rapidly, dust is little, noise is low, environmental pollution is small in the hole forming process, the reinforcement cage is hung on the steel casing through threaded steel bars, and the reinforcement cage can be prevented from falling off the cage or floating in the pouring process.

The invention relates to a mucky soil layer mixing pile reinforcing structure and a construction method, and is applied to the field of mixing pile technology, the mucky soil layer mixing pile reinforcing structure comprises a mixing pile body used for reinforcing a mucky soil layer, and reinforcing ribs are arranged in the mixing pile body used for reinforcing the mucky soil layer in the depth direction; the reinforcing ribs are provided with reinforcing mechanisms used for improving the connecting strength between the mixing pile body and a muddy soil layer on the peripheral side of the mixing pile body. The reinforcing mechanism comprises a connecting core and a plurality of external expansion ribs, the connecting core is arranged on the reinforcing rib in a sleeving mode, the external expansion ribs are hinged to the peripheral side of the connecting core at intervals, and the reinforcing rib is provided with an external supporting mechanism used for abutting the external expansion ribs into a muddy soil layer on the peripheral side of the mixing pile body. The stirring pile has the advantages that the stirring pile and the surrounding muddy soil layer are connected more tightly, and then the connecting strength of the stirring pile and the surrounding muddy soil layer is improved.

The invention discloses a construction method for reinforcing a PHC pipe pile core in a mucky soil layer area. The construction method comprises the following steps that according to a pile body quality report of low strain detection of the PHC pipe pile after excavation of a mucky soil body foundation, and sludge filled in an inner cavity of the PHC pipe pile which is judged to be in class II and class III quality grades by using a high-pressure jet grouting drilling machine is stirred and diluted; and then high-pressure compressed air of a high-pressure jet grouting drilling machine is used for gradually extruding slurry water formed through stirring and dilution out of an inner cavity of the PHC pipe pile; then reinforcing steel bars are continuously arranged in the weld joint cracking position area of a PHC pipe pile connector, then concrete is used for filling a pile core reinforcing space, and therefore pile core reinforcing work at the weld joint cracking position of the PHC pipe pile connector is completed. According to the construction method for reinforcing the PHC pipe pile core in the mucky soil layer area, the project construction period can be ensured, and the project construction cost increased by follow-up pile refilling can be reduced.

The invention provides a sample layering treatment device for argillaceous soil core column sample detection, and belongs to the technical field of geological survey, the sample layering treatment device comprises a sample placing part and a slitting and dividing part which are matched for use, and the slitting and dividing part is used for slitting and dividing a core column sample into independent sample units; the slitting and dividing part comprises a plurality of slitting discs which have an anti-sticking function and expand gaps between adjacent independent sample units to facilitate taking of the independent sample units, a radial limiting shaft is rotationally connected to the processing seat, middle connecting pieces are connected to the slitting discs, and the slitting discs are axially connected to the radial limiting shaft in a sliding mode through the middle connecting pieces. According to the sample layering treatment device for detecting the argillaceous soil core column sample, the sample slitting and dividing treatment efficiency and the slitting precision are effectively improved, the whole slitting process has the advantages of being high in stability and good in cut sample quality, the geological structure can be known by directly observing the sample in the slitting process, and the sample is fully and effectively utilized.

The invention discloses a prefabricated caisson mold construction method capable of replacing a brick forming die with mucky soil, and relates to the technical field of buildings. The prefabricated caisson mold construction method capable of replacing the brick forming die with the mucky soil comprises the following specific operation steps that S1, a current geological condition is judged, and if the mucky soil is very poor in cohesive force, prone to collapse and large potential safety hazards are caused, the step S2 is carried out; according to the prefabricated caisson mold construction method capable of replacing the brick forming die with the mucky soil, a caisson type steel mold is prefabricated in advance, the mold can be immediately hoisted in place after a foundation pit is excavated, the risk of slope collapse is prevented, the safety of elevator shaft and water-collecting well earth excavation is ensured, the engineering cost is reduced, the later maintenance cost is eliminated, the soft foundation bed forming die can replace a brick forming die, can play a role in protecting a wall, prevents earthwork collapse, forms a whole with a cushion layer, is good in waterproof performance and integrality, and can prevent the soft foundation bed layer from sinking and cracking due to uneven settlement.

The invention relates to a draining and dewatering system, in particular to a sludge soil draining and dewatering system and a construction method. The sludge soil draining and dewatering system comprises sand-containing water flow subsystems, a high-pressure rotary spraying subsystem and an draining well subsystem; a plurality of sand-containing water flow subsystems are arranged around the drainage well subsystem and are respectively connected with the high-pressure rotary spraying subsystem; sludge soil is replaced by sand-containing water through the high-pressure rotary spraying subsystem, so that a horizontal drainage body is formed; the high-pressure rotary spraying subsystem comprises a plurality of pipes, a nozzle is arranged at the bottom of the high-pressure rotary spraying subsystem, and the upper part of the high-pressure rotary spraying subsystem is respectively connected with a water pump, an air compressor and a vacuum pump; the sand-containing water flow subsystem comprises a sand-containing water pump and a sand-containing water bucket connected with the multiple pipes through the sand-containing water pump; the drainage well subsystem comprises a drainage well, a drainage pump is arranged in the drainage well, and water permeable holes are formed in the side wall of the drainage well. Compared with the prior art, the sludge soil is replaced with a soil body with good permeability through sand-containing water preparation, high-pressure water flushing, high-pressure rotary spraying, horizontal drainage and the like, permeation and collection of underground water are facilitated, and then the purpose of drainage and dewatering is effectively achieved through the drainage well.

The invention belongs to the technical field of deep foundation pit construction, and particularly discloses a deep and thick soft soil deep foundation pit soft soil body pre-reinforcement method. The method comprises the steps that a foundation pit supporting structure is constructed firstly, then soft soil body in a deep foundation pit is subjected to pre-reinforcement treatment to form a reinforcement body, the side face of the reinforcement body is tightly attached to the foundation pit supporting structure, the top of the reinforcement body is close to the ground, and the thickness of the reinforcing body is smaller than or equal to the thickness of the soft soil body above the excavation face of the deep foundation pit. According to the method, soft soil layers such as upper sludge and mucky soil in the foundation pit are subjected to pre-reinforcement treatment, the soil body strength is improved, and deformation of the foundation pit supporting structure is effectively controlled, so that the construction safety of the deep and thick soft soil deep foundation pit is guaranteed.

The invention discloses a construction method for progressive excavation of a plain river-adjacent reservoir basin under a mucky soil condition. The construction method comprises the following steps: driving a circle of continuous stirring piles at a dam foot; a reservoir is divided into four large areas, and main drainage ditches are dug in the two sides of a main road; paving a temporary construction road by utilizing the surface muck of the reservoir basin area, compacting the road surface, and excavating a secondary drainage ditch on the outer side of the temporary construction road; each small area is divided into a plurality of strip areas, and strip excavation is conducted from the small area on the outermost side of each large area; after the excavation of the outermost strip is completed, excavating the next small-area strip, and progressively excavating to the center of the reservoir basin in sequence; and the temporary construction road and the main road are excavated. According to the method, progressive partition excavation is conducted from the periphery to the center, and unexcavated mucky soil is solidified, so that construction vehicles and workers can enter the interior to conduct excavation construction of the center area. And a flow construction method is adopted and can be carried out simultaneously, so that the construction period is effectively shortened.

The invention discloses a leaching/wet detoxification method for different chromium pollution media. According to the method, miscellaneous fill and gravels which are subjected to chromium pollution are subjected to pretreatment, scrubbing and screening, then graded leaching is conducted, and the content of hexavalent chromium in the miscellaneous fill and gravels is reduced. Chromium-polluted silty clay and mucky soil are pretreated, scrubbed and screened, then materials larger than 2 mm are leached, the content of hexavalent chromium in the silty clay and mucky soil is reduced, materials of 2 mm or less are subjected to wet detoxification, and the content of hexavalent chromium in the silty clay and mucky soil reaches the standard. By adopting the organic combination of a same set of treatment system, the two working procedures of leaching and wet detoxification can be switched respectively, so that the investment and operation cost is reduced while the treatment effect is ensured.

The invention provides a semi-closed pipe type soil sampler, which comprises a sampling barrel, the rear end of the sampling barrel is connected with a drill pipe connecting pipe, and the front end of the sampling barrel is provided with a blade, and is characterized in that the sampling barrel is formed by splicing two semi-closed pipes, the front ends and the rear ends of the two semi-closed pipes are respectively connected with an outer cavity and the drill pipe connecting pipe to hoop and fix the outer cavity and the drill pipe connecting pipe, and an opening and closing cable spring is arranged in the outer cavity; an opening and closing claw of the opening and closing cable spring faces the rear end, the blade is movably connected to the front end of the outer cavity in an inserted mode and movably connected with the outer cavity in a telescopic mode, the rear end of the blade is inserted into the opening and closing cable spring, and opening and closing of the opening and closing claw of the opening and closing cable spring are controlled through front-back stretching and retracting of the blade in the outer cavity. The sampling operation is simple and easy to implement, the performance is reliable, the universality is good, the original state sampling effect of flow mud, sludge, mucky soil and soft plastic cohesive soil is obviously improved, the sampling quality is greatly improved, and the industrial problem is well solved.

The invention relates to an out-of-cylinder pile distributed composite foundation-cylinder type offshore wind power foundation and a construction method. The out-of-cylinder pile distributed compositefoundation-cylinder type offshore wind power foundation is suitable for a sea area with soft soil such as thick sludge, mucky soil and silt covering the offshore surface layer in China. The wind power foundation comprises a concrete transition section, a composite cylinder type foundation, a concrete circular bottom plate and cylinder periphery piles. The composite cylinder type foundation is ofa lower-opening cavity multi-branch-bin structure and sinks in the soft soil of the surface layer, the cylinder top makes contact with the mud surface, and the cylinder periphery piles are evenly distributed on the periphery of the composite cylinder type foundation. The advantages of underwater deep cement mixing piles (or sand compaction piles) and the advantages of the cylinder type foundationare combined, the bearing area of the cylinder type foundation is large, stability is good, and piling is not needed; but under the condition of the soft soil, the cylinder type foundation is large insedimentation and inclination, the cement piles (or the sand compaction piles) are arranged in the cylinder type foundation, the foundation deformation problem of the cylinder type foundation is solved, the manufacturing size of a suction cylinder is reduced, and the foundation manufacturing cost is reduced.

The invention discloses a synthetic system and method for sludge soil layer deep foundation pit supporting. The system comprises ABCD sludge soil mass supporting portion regions, EFGHJA soft soil layer supporting portion regions, a bottom plate layer, ESC-H Larsen piles, reinforced high-pressure jet grouting cement soil pile anchor rods, annular crown beams and waist beams. The multiple reinforcedhigh-pressure jet grouting cement soil pile anchor rods are fixedly arranged in soil mass around the wall of a foundation pit. The ABCD sludge soil mass supporting portion regions and the EFGHJA softsoil layer supporting portion regions are connected end to end to form a polygon. The annular crown beams are fixedly arranged on the top of the polygon in the ABCD sludge soil mass supporting portion regions, the annular waist beams are arranged in the middle of an inner cavity, and the bottom plate layer is arranged at the bottom of the inner cavity. The multiple ESC-H Larsen piles are arrangedbetween the annular crown beams. The shortage in traditional steel plate pile application is overcome, the use amount of steel is optimized and reduced, envelop structure potential safety hazards caused by the fact that the rigidity of a supporting plate belt is too high in a weak portion of a water stop envelop structure are avoided, and the synthetic system and method have high cost performancein a deep foundation pit supporting structure.