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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention discloses a method for eliminating loess collapsibility through microbial grouting. The method comprises the steps that bacillus pasteurii liquid is slowly and evenly added into loess, natural infiltration is conducted till the bacillus pasteurii liquid completely infiltrates a soil body, standing is conducted for 25-35 min, then 1-2 mol/L cementing liquid with the same amount as the bacillus pasteurii liquid is slowly and evenly added, standing is conducted for 24-48 h at the environment temperature of 25-30 DEG C, and circulation is conducted for no less than 4 times. Calcium carbonate precipitates are induced to be generated through the bacterial liquid in a urea hydrolysis technology mode, and loess collapsibility is eliminated; and according to the method, the loess site soil samples of different collapsibility grades are reinforced by utilizing the MICP reinforcing technology, so that the purpose of eliminating the loess collapsibility is achieved, the method has the advantages that the method is simple, the raw materials are easy to obtain, the cost is low, the effect of eliminating the loess collapsibility is obvious, and the method has important practical engineering significance.

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.

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.