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31results about How to "Reduce void ratio" patented technology

Deepwater single-wall steel plate pile cofferdam structure with low buried depth and construction method thereof

The invention discloses a deepwater single-wall steel plate pile cofferdam structure with low buried depth. The structure comprises a plurality of bored piles, a steel plate pile cofferdam around the bored piles, bagged sand positioned outside the cofferdam and arranged on the surface of a river bed, and high-pressure rotary jet piles constructed in the cofferdam and outside the bored piles, wherein the plane size of the cofferdam is greater than that of a bearing platform to be constructed so as to reserve a construction space. By using the steel plate pile cofferdam, the deepwater low pile bearing platform and the underwater part of a pier of a bridge can be constructed with relatively low cost and minimum construction risk, and a double-wall steel cofferdam scheme with relatively high cost does not need to be adopted for construction, so that the turnover steel consumption of the cofferdam serving as a temporary project is saved, and the application range of the deepwater steel plate pile cofferdam construction technology is enlarged.
Owner:THE FIRST ENG OF CCCC FOURTH HARBOR ENG +1

Construction method of vibrating immersed tube gravel slip-casting pile

InactiveCN101487254AGood reinforcement effectVibration compaction effect is obviousBulkheads/pilesEngineeringImmersed tube
The invention relates to a construction method for a vibration sinking pipe crushed stone grouting pile, which is a new method which integrates foundation treatment and deep foundation construction process into a whole and comprises the steps as follows: (1) sinking pipe is vibrated; (2) a reinforcing cage and an injection pipe are placed; (3) crushed stone is poured; (4) the pile is formed by pulling the pipe under vibration; (5) a drainage ditch is excavated; and (6) the pile is formed by injection. The method solves the problem that the prior art can not be compatible with the foundation treatment and deep foundation construction and makes up the shortages of the prior art.
Owner:郝东明

High-efficiency curing method for soft soil site with high moisture content

ActiveCN109763480AEfficient reinforcementReduce inputSoil preservationSoil scienceCement slurry
The invention belongs to the technical field of environment rock-soil engineering and discloses a high-efficiency curing method for a soft soil site with high moisture content. The high-efficiency curing method comprises an in situ chemical curing step and a preloading drainage step; the in situ chemical curing step comprises investigating sites, determining physical and chemical indexes such as depth, area, moisture content, organic matter content, liquid plastic limit and salt content of the soft soil site; blending a curing agent, determining the types, adding ratio, and initial and final setting time of the curing agent based on the physical and chemical indexes; blocking the site, and building partition walls for site blocking in the soft soil site; carrying out chemical curing construction, and uniformly mixing the blended curing agent with to-be-cured soft soil; carrying out preloading drainage construction according to three construction modes of vacuum preloading or surchargepreloading or vacuum surcharge preloading; unloading and repairing the site; after preloading time reaches 28 days, swabbing off drained water from the upper surface layer of curing blocks, unloadingand injecting cement slurry into a drain board for secondary repair and reinforcement by adopting a high-pressure grouting pump.
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI

Road filling material prepared from slag soil and electric furnace slag and preparation method of road filling material

The invention discloses a road filling material prepared from slag soil and electric furnace slag and a preparation method of the road filling material. According to the total weight of the road filling material, the road filling material comprises the following components in percentage by weight: 1-12% of active micro powder, 20-50% of electric furnace slag, 20-70% of slag soil and 0.02-0.06% of an activator. According to the road filling material, the requirements of road indexes can be met; the slag soil and the electric furnace slag can be fully used.
Owner:北京元泰达环保科技有限公司

Saline soil area combined drain system and combined water drain forced ramming foundation treating method thereof

InactiveCN101349052AImprove foundation bearing capacity and modulusSave ground treatment costsSoil preservationProcess regionEngineering
The invention relates to a combined drainage system in a saline oil region and a method for processing the combined drainage and strongly tamping foundation. The method comprises the following steps: firstly, the combined drainage system for dredging and discharging groundwater is arranged in the foundation soil of a treatment region; the combined drainage system comprises a drainage passage combined by plastic drainage strips and dinas drainage piles; each plastic drainage strip and each dinas drainage pile are covered and a construction and operation surface layer is paved on the surface of the treatment region; the strongly tamping is carried out on the construction and operation surface layer by a tamping hammer; a tamping pit is formed in each dynamic tamping position; after groundwater in the foundation is collected in the tamping pits, pumped and discharged to the outside of a construction field; and the tamping pits are backfilled and leveled, thereby completing the first point tamping. The combined drainage system and the method solve the problem of discharging groundwater, substantially improve the bearing capacity of the foundation and the modulus, meet the requirements of constructing various buildings in the saline oil region, can save the expenses of foundation treatment by over 40 percent and shorten the construction period of the foundation treatment by more than one half.
Owner:JIAN YAN FOUND ENG

Dynamic compaction treatment method of deep foundation displacement

The invention relates to a construction method of a building foundation treatment technology, in particular to a dynamic compaction treatment method of deep foundation displacement. The method comprises two construction schemes, the first construction scheme adopts a method that sand-gravel pile construction is conducted first, and then dynamic compaction is conducted, pores are formed through a vibration pipe sinking method, piles are formed by stuffing, and local compaction is conducted on soil between the piles; the second construction scheme adopts a method that the dynamic compaction is conducted first, and then the sand-gravel pile construction is conducted, full compaction is conducted on a field, the pores are formed through the vibration pipe sinking method, and the piles are formed by the stuffing. According to the dynamic compaction treatment method of the deep foundation displacement, the advantages of the vibration pipe sinking sand-gravel pile method and the dynamic compaction method on treating soft foundations are combined, and the part displacement of the soft foundations and the dual compaction effects of the dynamic compaction and the vibration are achieved. The dynamic compaction treatment method of the deep foundation displacement has the advantages of being good in treatment effect, low in treatment cost, economical, reasonable and capable of saving resources.
Owner:山东建勘集团有限公司

A method for improving in-service tailings pond capacity and a device thereof

The present invention discloses a method for improving an in-service tailings pond capacity and a device thereof, belonging to a field of tailings pond expansion technology. The method and the device are realized through a three-step tailings pond processing: a step of installing a working cushion for a tailings pond with a designed pond capacity and constructing a drainage system for drainage consolidation; a step of increasing the dam body height, discharging new tailings mud into the pond, and installing the working cushion and constructing a drainage system for a second time when the mud reaches the newly-increased dam body height; a last step of conducting consolidation processing on the newly-discharged tailings mud and storing the mud in different areas and on different layers via a paving system. The method for improving the in-service tailings pond capacity and the device thereof substantially reduce horizontal acting force of original tailings mud on an original tailings dam while a saturation line of the tailings dam body is lowered, with safety of the tailing pond improved, void ratio of a tailings soil mass greatly reduced, and the capacity of the tailings tank enhanced. Therefore the service life of the tailings pond is prolonged. The construction device of improving in-service tailings pond capacity has characteristics of easy operation, flexible combination, quick operation, and succinct and efficient construction technology.
Owner:BEIHANG UNIV

Bonding filling material and method for carrying out downhole filling using the same

The present invention relates to a bonding filling material and a method for carrying out downhole filling using the same, wherein the said gangue bonding filling material comprises: 68.6-82.2% by weight of gangue; 12.7-21.8% by weight of coal ash; and 1-18.7% by weight of water. Pressure intensity of the rammer compacter for filling and compacting in filling the bonding filling material is more than or equal to 20 Mpa. According to the invention, filling effect and filling quality are improved, and the movement of the overlying strata can be effectively controlled. The bonding filling material is filled directly without any additives, and the bonding property of the bonding filling material is increased due to the addition of coal ash as one filling material. The conveying system in the invention has simple requirements and enables continuity and high effectiveness of the filling. Downhole treatment of gangue and coal ash is fulfilled, and ecological and living environment around mining area are improved.
Owner:JIZHONG ENERGY +1

Sludge dewatering concentration and consolidation treatment method

The invention relates to an environment-friendly and efficient method for dewatering consolidation of sludge in the urban waters and sewage treatment plants, belonging to the technical field of sludge dewatering processes. The method comprises the following steps: adding a certain amount of lime milk into the sludge to be treated, wherein the addition is generally 0.1-1wt%; adding the liquid obtained by mixing sodium silicate and sulfuric acid through a high-speed stirrer, wherein the addition is 0.01-0.5wt%; stirring for about 2-10 minutes, blowing in air or carbon dioxide to reduce the pH value to 7.5-8.5; and putting the slurry into a sedimentation tank or air flotation tank for separation. Through a series of water absorption, hydrolysis and hydration reactions, an irreversible condensation hardened shell is formed, and the sludge particles have certain water stability and strength stability. After that, generally 5-10wt% of the mixture of cement, lime and fly ash is added so that the sludge is internally dense; and after being hardened, the sludge has certain structural strength. Through the water absorption effect of the solidified material after two-step treatment, the moisture content of the sludge can be effectively reduced, and certain 'pollution reduction' and 'strengthening and solidifying' effects are realized.
Owner:TIANJIN POLYTECHNIC UNIV

Saline soil area combined drain system and forced ramming foundation treating method thereof

The invention relates to a combined drainage system in a saline oil region and a method for treating the strongly tamping foundation. The method comprises the following steps: firstly, plastic drainage strips are constructed in a treatment region, then a dinas drainage undercourse is paved on the position of the surface of the treatment region coated with each drainage strip; the plastic drainage strips and the dinas drainage undercourses are combined to form a passage for dredging and discharging groundwater; points are distributed on the dinas drainage undercourses and strongly tamped by a tamping hammer; a tamping pit is formed in each strongly tamping position; after the groundwater in the foundation flows into each plastic drainage strip, flows to the dinas drainage undercourse by the plastic drainage strips and are collected in the tamping pits by the dinas drainage undercourses; the groundwater collected in the tamping pits is pumped and discharged to the outside of a construction field; and finally, the tamping pits are backfilled and leveled. The combined system and the method can substantially improve the bearing capacity of the foundation and the modulus, meet the requirements of constructing various buildings in the saline oil region, save the expenses of foundation treatment and shorten the construction period of the foundation treatment.
Owner:JIAN YAN FOUND ENG

Multi-vibroflot resonance ground treatment equipment and method

ActiveCN103215944BSignificant compaction and reinforcement effectImprove bearing capacitySoil preservationResonanceArchitectural engineering
The invention discloses multi-vibroflot resonance ground treatment equipment and a multi-vibroflot resonance ground treatment method, and relates to the technical field of sandy soil ground treatment. The equipment comprises an equipment main body, a cantilever, a suspension cable component, channel steel, at least two steel ropes and vibration devices in a number which corresponds to that of the steel ropes, wherein the equipment main body is connected with the suspension cable component through the cantilever; the suspension cable component is fixedly connected with the middle position of the channel steel; the two sides of the channel steel are connected with the at least two uniformly distributed steel ropes; the lower parts of the steel ropes are fixedly connected with the corresponding vibration devices; the vibration devices are vibroflots in which skewed rotors driven by motors are arranged, and are provided with water inlets which are connected with a high-pressure water pump; and a buffering vibration-proof gasket is arranged between each vibration device and the corresponding steel rope. The construction method is simple, the equipment and the method are rational in design, convenient to implement, low in construction cost and high in working efficiency, can be effectively applied to a sandy soil ground treatment process, and have good treatment effects, and the construction quality is easily ensured.
Owner:SHANGHAI HARBOUR SOFT SOIL TREATMENT ENG CO LTD +1

PERC solar cell sintering method

The invention discloses a PERC solar cell sintering method. The method includes a warming step and a cooling step. In the warming step, temperature is raised to 600 DEG C from 300 DEG C at a temperature rise rate of 30-90 DEG C / s. According to the invention, a comparatively high temperature rise rate is adopted, so that Al-Si balance is achieved quickly and diffusing amount and depth of Si to Al are reduced, and thus Al-Si cavity proportion is reduced. As the experiments prove, compared with the prior art, the Al-Si cavity proportion of a solar cell obtained by utilizing the method provided by the invention is reduced by over 60 percents and the battery efficiency is improved by 0.14-0.30 percent. An extraordinary technical effect is achieved.
Owner:CSI CELLS CO LTD +1

Device and method for reinforcing soft soil foundation through combination of strong drainage preloading and electroosmosis

The invention discloses a device and method for reinforcing a soft soil foundation through combination of strong drainage preloading and electroosmosis, and relates to the technical field of soft soil foundation reinforcing engineering. The device for reinforcing the soft soil foundation through the combination of strong drainage preloading and electroosmosis comprises at least one drainage assembly, the drainage assembly comprises at least one strong drainage plate and an electroosmosis unit, the strong drainage plate is coated with a filter membrane, a drainage channel is formed between the strong drainage plate and the filter membrane, the strong drainage plate is connected with a Venturi tube, and the interior of the Venturi tube is hollow to form a jet flow inner cavity of which the front and back are correspondingly connected with a fluid inlet and a fluid outlet; and the electroosmosis unit comprises an anode and a cathode which are matched for use, the anode is a steel bar inserted into the soft soil foundation, the cathode is an electrode arranged in the drainage channel, and the electrode and the steel bar are matched to enable pore water with positive charges to permeate the filtering membrane and flow into the drainage channel. The soft soil foundation can be reinforced, the consolidation effect of the deep layer part and the shallow layer part is further improved, and the void ratio of the soil body is reduced.
Owner:GUANGZHOU SHENGZHOU FOUND ENG

Foam aluminum pole piece coating equipment and pole piece production method using the same

The present application provides foamed aluminum pole piece coating equipment and a pole piece production method using the same. The foamed aluminum pole piece coating equipment includes: a slurry pool, including a squeeze roller, the slurry pool is formed with a first cavity, the squeeze roll is arranged in the first cavity containing the slurry, and the squeeze roll includes a roller The blade and the blade connected to the roller are formed by protruding toward the outside of the roller, and the squeeze roller is used to guide the slurry to the aluminum foam pole piece by rotating the blade; the scraper mechanism includes the first scraper and the second scraper arranged at intervals Two scrapers, the first scraper and the second scraper are equipped with a comb-like tooth structure, the comb-like tooth structure is used to scrape off part of the slurry on the surface of the foamed aluminum; the driving mechanism is located on the scraper mechanism away from the slurry pool One side is used to drive the displacement of the aluminum foam pole piece relative to the scraper mechanism and the slurry pool. The foamed aluminum pole piece coating equipment can ensure that the slurry in the foamed aluminum is filled densely, and can also realize functions such as automatic coating, scraping off excess slurry, standing to dry, and accurately controlling the thickness of the pole piece.
Owner:ZHONGTIAN SUPERCAPACITOR TECH CO LTD +1

Preparation method of full-body granite ceramic tile

The invention belongs to the field of ceramic tiles, relates to a preparation method of a full-body granite ceramic tile and aims to solve the problems of non-uniform coloring, long production periodand high production cost of an existing full-body granite ceramic tile. The following technical schemes are adopted: the preparation method comprises the following steps that: S1, raw materials are crushed and ball-milled, the crushed and ball-milled material is sieved, and iron is removed, so that slurry A is prepared; S2, the slurry A in the S1 is subjected to powder formation, pressing and pre-drying, so that a brick blank B can be obtained; S3, the brick blank B in the S2 is sequentially subjected to ground coat spraying, protective glaze spraying, pattern spraying and dry granular glaze spraying treatment to obtain a brick blank C, the caliber of dry granular glaze spraying nozzles is 2.8-3.0 mm, each nozzle is of a spiral structure, the multiple nozzles are connected with the same glaze suction pipe, and a quarter ball valve is installed on the glaze suction pipe; and S4, the brick blank C in the S3 is subjected to material throwing and drying, the treated brick blank C is put into a firing kiln so as to be fired and molded, so that a sample D can be obtained; and S5, the sample D in the S4is processed, inspected and classified. The full-body granite ceramic tile is uniform in coloring, short in production period and low in production cost.
Owner:广东强辉陶瓷有限公司

Large-area hydraulic fill dredging powder ground base disposed by vibration liquidizing drainage

A large-area hydraulic fill dredging powder ground base disposed by a vibration liquidizing drainage relates to a disposition of hydraulic fill dredging powder ground soft base in geotechnical engineering and port engineering. The technical scheme adopted the invention in that a waterborne excavator and a land excavator are adopted. The base is characterized in that a vertical or horizontal vibration force is exerted to the powder ground base by using a grab bucket of the waterborne excavator; a vibration part is fully liquidized through the repeated downward and upward vibrations of the grab bucket; drainage ditches are excavated at a interval of 20 m * 20 m in the field to drain the free water liquidized by the vibration of the waterborne excavator; and local areas with poor disposing effect are reinforced and disposed by the land excavator. The invention is used for large-area hydraulic fill dredging powder ground base disposition.
Owner:上海交通建设总承包有限公司 +1

Foamed aluminum pole piece coating equipment and pole piece manufacturing method applying same

The invention provides foamed aluminum pole piece coating equipment and a pole piece manufacturing method applying same. The foamed aluminum pole piece coating equipment comprises a slurry pool, the slurry pool comprising an extrusion roller, a first cavity being formed in the slurry pool, the extrusion roller being arranged in the first cavity containing slurry, the extrusion roller comprising a roller and blades connected with the roller, the blades protruding towards the outer side of the roller, and the extrusion roller being used for enabling the blades to guide the slurry to a foamed aluminum pole piece through rotation; a scraping plate mechanism, comprising a first scraping plate and a second scraping plate which are arranged at an interval, comb-shaped tooth structures being arranged on the first scraping plate and the second scraping plate, and the comb-shaped tooth structures being used for scraping part of slurry on the surface of the foamed aluminum; a driving mechanism, arranged on the side, away from the slurry pool, of the scraper mechanism and used for driving the foamed aluminum pole piece to move relative to the scraper mechanism and the slurry pool. The foamed aluminum pole piece coating equipment can ensure that slurry in foamed aluminum is filled compactly, and can also achieve the effects of automatic coating, redundant slurry scraping, standing for drying, accurate pole piece thickness control and the like.
Owner:ZHONGTIAN SUPERCAPACITOR TECH CO LTD +1

Method for reinforcing an arch bridge by spraying UHPC (Ultra High Performance Concrete) and planting steel bars

The invention discloses a method for reinforcing an arch bridge by spraying UHPC (Ultra High Performance Concrete) and planting steel bars. The method comprises the following steps: (1) planting the steel bars on the side surfaces and the bottom surfaces of arch ribs of an arch ring; (2) spraying UHPC materials on the side surfaces and the bottom surfaces of the arch rings and the arch ribs at the positions where the steel bars are planted in the step (1) so as to form UHPC base layers; (3) after the UHPC foundation layer is stable, a reinforcing mesh being hung at the position where bar planting treatment is conducted; (4), the UHPC material being sprayed to the side faces of the arch ring and the arch rib and the bottom face of the arch ring and the arch rib again at the position where the steel bar planting treatment is conducted in the step 1 to form a UHPC reinforcing layer with the thickness being a second set value. The thickness of the reinforcing layer can be effectively reduced, meanwhile, the reinforcing procedure of the arch bridge is reduced, the construction speed is increased, and the engineering cost is reduced.
Owner:CHONGQING JIAOTONG UNIVERSITY

A Construction Method of Sprinkling Water Impact Rolling on Shallow Drought Coral Sand Foundation

ActiveCN108301393BEconomic compaction effectImprove compactionSoil preservationSoil scienceCoral sand
The invention relates to the field of shallow dredging and filling coral sand foundation treatment, in particular to a construction method of spraying and impacting rolling on shallow dredging and filling coral sand foundations. In view of the looseness, low density and slightly high compressibility of the dredged coral sand foundation that has been transshipped and refilled on site, this construction method requires that the site be leveled first, and then sprinkled on the site until the coral sand foundation is close to the optimal level. Moisture content state (moisture content ≥ 20%), then use a 25 kJ triangular impact roller for impact rolling, and always cooperate with watering during the impact rolling process until the foundation is compacted. The number of times of impact rolling is 20 times, and then it is rolled with a 25t vibrating smooth surface roller until there is no obvious wheel mark. The construction method of the invention can improve the compactness of the foundation of the dredged coral sand island reef, increase the bearing capacity of the foundation, reduce the settlement of the foundation after construction, and has the advantages of simple operation and good effect.
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI

Inverted filter material water permeable pile composite foundation and water permeable rate measuring device and method thereof

The invention discloses an inverted filter material water permeable pile composite foundation and a water permeable rate measuring device and method thereof. The composite foundation comprises recycled concrete water permeable piles, prestressed concrete piles, geotextile wrapping the recycled concrete water permeable piles and a mattress layer laid at the tops of the water permeable piles. The measuring device comprises a sleeve, an inner support arranged in the sleeve, a pervious concrete test piece arranged on the inner support and geotextile wrapping a water permeable concrete test piece.Waste concrete is recycled to be made into recycled concrete, the recycled concrete is combined with the geotextile, resources are saved, meanwhile, the foundation has good water permeability, water can be drained to the maximum extent, sandy soil is reserved, piping and quicksand caused by hydraulic power are prevented, the bearing capacity of the foundation is improved, and sedimentation of a building is reduced; the corresponding water permeable rate testing device is simple in structure, the testing method is convenient to use, and the water permeable performance of the water permeable concrete and the impermeability of a concrete test block can be rapidly detected.
Owner:NANCHANG UNIV

A method for improving in-service tailings pond capacity and a device thereof

The present invention discloses a method for improving an in-service tailings pond capacity and a device thereof, belonging to a field of tailings pond expansion technology. The method and the device are realized through a three-step tailings pond processing: a step of installing a working cushion for a tailings pond with a designed pond capacity and constructing a drainage system for drainage consolidation; a step of increasing the dam body height, discharging new tailings mud into the pond, and installing the working cushion and constructing a drainage system for a second time when the mud reaches the newly-increased dam body height; a last step of conducting consolidation processing on the newly-discharged tailings mud and storing the mud in different areas and on different layers via a paving system. The method for improving the in-service tailings pond capacity and the device thereof substantially reduce horizontal acting force of original tailings mud on an original tailings dam while a saturation line of the tailings dam body is lowered, with safety of the tailing pond improved, void ratio of a tailings soil mass greatly reduced, and the capacity of the tailings tank enhanced. Therefore the service life of the tailings pond is prolonged. The construction device of improving in-service tailings pond capacity has characteristics of easy operation, flexible combination, quick operation, and succinct and efficient construction technology.
Owner:BEIHANG UNIV

Saline soil area combined drain system and forced ramming foundation treating method thereof

ActiveCN101349051BAvoid crowdingSave construction and development fundsSoil preservationProcess regionEngineering
The invention relates to a combined drainage system in a saline oil region and a method for treating the strongly tamping foundation. The method comprises the following steps: firstly, plastic drainage strips are constructed in a treatment region, then a dinas drainage undercourse is paved on the position of the surface of the treatment region coated with each drainage strip; the plastic drainagestrips and the dinas drainage undercourses are combined to form a passage for dredging and discharging groundwater; points are distributed on the dinas drainage undercourses and strongly tamped by a tamping hammer; a tamping pit is formed in each strongly tamping position; after the groundwater in the foundation flows into each plastic drainage strip, flows to the dinas drainage undercourse by theplastic drainage strips and are collected in the tamping pits by the dinas drainage undercourses; the groundwater collected in the tamping pits is pumped and discharged to the outside of a construction field; and finally, the tamping pits are backfilled and leveled. The combined system and the method can substantially improve the bearing capacity of the foundation and the modulus, meet the requirements of constructing various buildings in the saline oil region, save the expenses of foundation treatment and shorten the construction period of the foundation treatment.
Owner:JIAN YAN FOUND ENG

Method for constructing non-filled vibration-compacted sand piles on silty-fine sand foundation

The invention discloses a method for constructing non-filled vibration-compacted sand piles on a silty-fine sand foundation, which includes the steps: firstly, measuring pile positions and setting out lines; secondly, constructing vibration-compacted sand piles, namely, for each vibration-compacted sand pile, setting a vibrator in place, forming a hole for vibration nearby the hole, controlling the vibrator to vertically penetrate into the silty-fine sand foundation to a pile bottom designed elevation at the speed V<descent>; in formation of the hole, using the vibrator to synchronously compact and strength constructed piles around the vibration-compacted sand pile being constructed, performing compaction to form the piles, and controlling the vibrator to slowly ascend to an opening of the hole at the speed V<ascent>; and thirdly, completing construction of the plurality of vibration-compacted sand piles. The method is simple, reasonable in design, convenient in implementation, low in manufacture cost, high in work efficiency, easy for guarantee on construction quality, and can be used for solving the problems that the existing foundation treatment method is high in input cost, complex in construction process, low in construction efficiency, poor in foundation reinforcement effect, unsuitable for deep foundation reinforcement and the like in treatment of the silty-fine sand foundation.
Owner:SCEGC NO 6 CONSTR ENG GRP CO LTD

Connection substrate

A through-conductor 11 provided within a through-hole in a ceramic substrate has a metal porous body 20, glass phases 17, 19 formed in air holes 16A-16D in the metal porous body 20, and voids 30, 31 within the air holes. The area ratio of the air holes in a cross-section of the through-conductor 11 is 5-50%. When the through-conductor 11 is divided into a first portion 11A on a first-main-surface11a side and a second portion 11B on a second-main-surface 11b side as viewed along the thickness direction B of the ceramic substrate, the area ratio of the glass phases in the first portion 11A is greater than the area ratio of the glass phases in the second portion 11B, and the area ratio of the voids in the first portion 11A is less than the area ratio of the voids in the second portion 11B.
Owner:NGK INSULATORS LTD

Composite grouting pile treatment process for deep road diseases

The invention provides a composite grouting pile treatment process for deep road diseases, and belongs to the technical field of road repair. The method comprises the following steps that 1, a ground penetrating radar is adopted for detection, the types and positions of highway diseases can be accurately mastered, and then a hole site scheme is reasonably customized according to defects; according to the grouting pile, holes are formed in a roadbed and a pavement to form the pile, the cement composite stable gravel material is poured to form a deep composite foundation, then inorganic silicon compound slurry is injected into the roadbed and a base layer through the grouting holes, moisture and air in cracks are discharged in a filling, permeating and compacting mode, the space of the cracks is occupied, and therefore the deep composite foundation is formed. The void ratio is reduced, the strength is improved, after a period of time, an original roadbed is cemented into a whole through chemical cementing, ion exchange, inert filling and compaction, a new composite supporting pile structure system is formed, and therefore the roadbed and a base layer are reinforced. The maintenance time can be 1-3 hours, and the traffic maintenance time is short.
Owner:浙江实路工程技术有限公司

A high-efficiency solidification method for soft soil sites with high moisture content

ActiveCN109763480BEfficient reinforcementReduce inputSoil preservationSoil scienceEngineering
The invention belongs to the technical field of environment rock-soil engineering and discloses a high-efficiency curing method for a soft soil site with high moisture content. The high-efficiency curing method comprises an in situ chemical curing step and a preloading drainage step; the in situ chemical curing step comprises investigating sites, determining physical and chemical indexes such as depth, area, moisture content, organic matter content, liquid plastic limit and salt content of the soft soil site; blending a curing agent, determining the types, adding ratio, and initial and final setting time of the curing agent based on the physical and chemical indexes; blocking the site, and building partition walls for site blocking in the soft soil site; carrying out chemical curing construction, and uniformly mixing the blended curing agent with to-be-cured soft soil; carrying out preloading drainage construction according to three construction modes of vacuum preloading or surchargepreloading or vacuum surcharge preloading; unloading and repairing the site; after preloading time reaches 28 days, swabbing off drained water from the upper surface layer of curing blocks, unloadingand injecting cement slurry into a drain board for secondary repair and reinforcement by adopting a high-pressure grouting pump.
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI

A landfill anti-seepage system and a breakdown monitoring method for prolonging the breakdown time of heavy metal ions

The invention discloses a landfill seepage-proof system for prolonging breakdown time of heavy metal irons and a breakdown method. The system comprises a seepage-proof cushion layer, a number direct current power supply, an electric current sensor, a computer and an alarming device. The seepage-proof cushion layer comprises a lower outer layer high-density polyethylene geomembrane, a lower conductive geotextile, a middle swelling clay layer, an upper conductive geotextile and an upper outer layer high-density polyethylene geomembrane. The upper conductive geotextile is connected with a negative pole of the number direct current power supply to serve as a cathode. The lower conductive geotextile is connected with a positive pole of the number direct current power supply to serve as an anode. Electric field force is applied to the middle seepage-proof cushion layer through the upper conductive geotextile and the lower conductive geotextile, so that the pollution irons of heavy metal and the like move reversely, and accordingly, the service life of the seepage-proof cushion layer is greatly prolonged. A microstructure of the middle swelling clay layer changes into a particle packing structure from an original flocculent structure under the effect of the electric field force, so that the transportation and diffusion of pollutants are better prevented.
Owner:ZHEJIANG UNIV

A pile-forming steel pipe for bottom-expanding crushed stone pile and its construction method

The invention discloses a pile-forming steel pipe for bottom-expanding crushed stone piles and a construction method thereof, wherein the pile-forming steel pipe for bottom-expanding gravel piles includes a straight pipe feeding part at the upper part of the pile pipe and a bottom-expanding part at the lower part, wherein the bottom-expanding part includes enlarged The head-type valve pile tip, the hydraulic propulsion device for expanding the bottom, the fixed shaft for the fixed connection of the side wall of the pile tube, and the pushing steel plate, the pushing steel plate is an even number, and is arranged symmetrically on the outside of the pile tube The bottom hydraulic propulsion device is arranged in the fixed shaft and connected with the pushing steel plate. The pile-forming steel pipe construction of the present invention can solve the problem that gravel piles form an inverted trapezoidal shape with a small bottom and a big top due to excessive self-weight stress of the lower soil body, which improves the bearing performance of the pile body itself and strengthens the resistance to the lower soil body at the same time. The compaction effect reduces the consolidation settlement of the composite foundation and greatly improves the bearing capacity.
Owner:SOUTHEAST UNIV

Synchronous blast-enlarging treatment method for liquified soil foundation of highway

This invention relates to synchronous explosion extending method for liquefied foundation of high way. Said method contains distributing explosion extending holes and drainage ditch along road, the hole is filled with explosive, burster and explosive loading pipe for sealing hole, the top of each hole excavated with stone filling pit having volume greater than that of explosion extending cavity, the explosion extending is operated in two time delay. Said invention both forms explosion extending cavity and explosion stone filling with fine water charge and effectively solidifying explosion soil body, greatly reduces the adverse effect to around environment.
Owner:CHINA UNIV OF MINING & TECH
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