37results about How to "Reduce the depth of burial" patented technology

The invention discloses a caisson and pile combined foundation of consolidated subsoil and a construction method of the caisson and pile combined foundation. The caisson and pile combined foundation of the consolidated subsoil comprises the consolidated subsoil, a sand-gravel cushion, a caisson, bored piles, pile bottom grout, top seal concrete and scour protection. The main construction method comprises the following steps: consolidating the foundation with an underwater compaction sand pile or a deep-layer cement mixing pile; laying the sand-gravel cushion on the consolidated subsoil; sinking the caisson with a skirt, pile sinking guide holes and grouting reserved pipes on the sand-gravel cushion; after the caisson is located, constructing bored piles through the pile sinking guide holes; after construction of the bored piles, casting the top seal concrete at the bottom in the caisson; grouting the bottom of the caisson through the grouting reserved pipes at the bottom of the caisson, carrying out pile bottom grouting through grouting pipes in the pile, and at last casting the top plate of the caisson. In the construction process, the scour protection shall be performed around the caisson according to requirements. The caisson and pile combined foundation of the consolidated subsoil and the construction method of the caisson and pile combined foundation, disclosed by the invention, can effectively improve vertical and horizontal bearing capacity of the caisson, and control sedimentation and horizontal displacement of the caisson.

The invention discloses a freezing bottom-sealing construction method for a deep foundation pit, and relates to a construction method for a foundation pit bracing structure. The freezing bottom-sealing construction method is characterized by comprising the following steps: (1) constructing underground diaphragm walls; (2) drilling and laying freezing pipes; (3) performing stratified excavation, and meanwhile, commencing the freezing of a foundation pit baseplate within the design time; (4) after the bottom of the foundation pit is excavated, pouring the foundation pit baseplate, namely a concrete baseplate; and (5) cutting off the freezing pipes exposed in the foundation pit. The freezing bottom-sealing construction method provided by the invention has the advantages that under the premise that the construction safety is guaranteed, the underground diaphragm wall buried depth can be greatly shortened, and the underground diaphragm wall construction difficulty and the construction risk can be reduced.

The invention relates to a flange extension type column foot for a narrow flange steel column, and a construction technology of the column foot. The column foot is characterized in that the column foot is embedded into a reinforced concrete foundation; the column foot comprises a bottom plate arranged at the bottom end face of the steel column, and flange extension plates arranged on two side walls of two flanges of the steel column respectively; the flange extension plates are welded on the side walls of the flanges by groove complete-penetration welds, and welded with the bottom plate; vertical stiffening ribs are welded between the two opposite flange extension plates; horizontal stiffening ribs are arranged at a top port of a containing cavity; a plurality of studs are uniformly on the bottoms of outer wall surfaces of the two flanges respectively; and anchor bolts are arranged at the two ends of the bottom plate. According to the column foot, with the adoption of the horizontal stiffening ribs and the vertical stiffening ribs, the effective bearing width of an embedded part of the steel column is increased, a bending moment and a shearing force borne by an imbedded column foot node can be transferred conveniently, the embedded depth of the steel column can be reduced significantly, and the embedded depth of the foundation or a bearing platform can be further reduced. The column foot has better economic benefits in engineering practices.

The invention provides a drought geological grounding grid comprising vertical grounding electrodes, horizontal grounding bodies, a grounding lead-out wire and a lightning rod. The drought geological grounding grid also comprises multiple grounding trenches. There are multiple vertical grounding electrodes. There are multiple horizontal grounding bodies. One horizontal grounding body is fixedly arranged in one grounding trench. The multiple vertical grounding electrodes and the multiple horizontal grounding bodies are arranged at the periphery of the lightning rod. The two ends of the horizontal grounding bodies are fixedly connected with the upper ends of the vertical grounding electrodes and connected with the grounding lead-out wire at the position of being close to the lightning rod. The grounding lead-out wire is connected with the lightning rod. The two ends of another part of the horizontal grounding bodies are fixedly connected with the upper ends of the vertical grounding electrodes. The vertical grounding electrodes are vertically arranged below the grounding trenches. The upper ends of the vertical grounding electrodes are higher than the bottom of the grounding trenches. The horizontal grounding bodies and the upper ends of the vertical grounding electrodes are wrapped by a resistance reduction agent layer. A mixed water retention agent fine soil layer is laid on the bottom part of the grounding trenches. A common backfill soil layer is arranged on the mixed water retention agent fine soil layer. The drought geological grounding grid is mainly used for the substation grounding grid of drought areas so that the laying depth of the grounding electrodes can be greatly reduced.

The invention discloses a lifting pile. The lifting pile comprises a base barrel used for being buried underground, a telescopic pile stretching out of or retracting back into the base barrel, a pulling unit used for pulling the telescopic pile to retract back into the base barrel or release the telescopic pile to stretch out of the base barrel, and a jacking unit used for storing energy when thetelescopic pile retracts back into the base barrel and releasing energy when the pulling unit releases the telescopic pile so as to jack the telescopic pile out of the base barrel. By the adoption ofthe above technical scheme, the structure is simple and reliable, and the effect that the burying depth of the base barrel is further reduced can be achieved.

The invention belongs to the technical field of offshore wind power foundations, and discloses a long and short pile bucket foundation suitable for deep water complex sea areas and a construction method of the bucket foundation. The bucket foundation comprises a bucket structure composed of a bucket top cover and a bucket apron board. A plurality of side tanks are arranged in the bucket structure.A plurality of short piles are evenly and annularly distributed in the bucket structure, and the short piles are arranged in the side tanks. The top ends of the short piles are flush with the buckettop cover, holes are formed in the portions, corresponding to top openings of the short piles, of the bucket top cover, and the bottom ends of the short piles are basically flush with the bucket apronboard. A long pile is embedded in each short pipe, the tops of the long piles of the bucket foundation arranged in place are cut off to be flush with the bucket top cover, and the top ends of the long piles and the top ends of the short piles are subjected to cover sealing treatment together. According to the construction method, the long piles are driven into the earth and then the bucket structure is sunk or the bucket structure is sunk and then the long piles are driven into the earth. The bucket foundation has good anti-overturning performance, skid resistance and stability, high in bearing capacity and precise to construct and install, the installation stability and safety of the bucket foundation in the deep water complex sea areas are improved, and the application range of bucket foundation installation is expanded.

The invention relates to a solar photovoltaic thermal/electric heat tracing system for a permafrost-buried pipe. The solar photovoltaic thermal/electric heat tracing system has the characteristics as follows: (1) a heat-storing and heat-tracing resistance wire is electrified and heated by a solar photovoltaic conversion system on a permafrost-buried part of a fluid pipeline on a user side so as to achieve all-weather heat tracing fluid supply; (2) the solar photovoltaic thermal/electric heat tracing system is used for heat tracing protection on a trunk pipeline buried into a permafrost layer so as to prevent the fluid trunk pipeline from freezing (coagulating); (3) a heat-insulating layer made of a phase change heat storage material is wrapped around the permafrost-buried part of the fluid pipeline on the user side, and through electrification-caused thermal storage in the daytime and coagulation-caused heat release at night, heat storage and delayed heat release are achieved; (4) storing remaining electricity of the solar photovoltaic conversion system in a storage battery, and controlling a circuit by a temperature control system according to the real-time temperature around the pipeline so as to achieve intermittent power supply heat tracing, thereby saving energy. The solar photovoltaic thermal/electric heat tracing system has the characteristics of simple and flexible structure, energy conservation, environmental friendliness and the like; without using an additional power supply and power equipment, the investment, maintenance and operating costs can be greatly reduced.

The invention discloses a helical ridge cleaning device which is applied to a corn ridge-planting no-till planter, and belongs to the technical field of agricultural machinery. The helical ridge cleaning device is arranged in front of an opener, and mainly comprises a cutter shaft and a circular knife welded on the cutter shaft; the surface of the circular knife is formed by constant speed movement of element lines which are vertical to the cutter shaft around the cutter shaft; the helical angle of the circular knife at the outer diameter position is minimum, and the helical angle at the inner diameter position is maximum, the helical angle alpha r at the inner diameter position is 48 to 50 degrees, the helical angle alpha g at the average radius position is 26 to 30 degrees, and the screw pitch S is 90 to 110mm, which ensures the straws in the ridge can be successfully cleaned to the field ditch. Compared with the single-disk cleaning device, during operation, the cut straws and stubbles be cleaned to the field ditch when cutting off the straws and stubbles on the ridge so as to prevent the field ditch from clogging; meanwhile, the helical ridge cleaning device has the advantages of small buried depth, no throwing-soil, small power consumption and small damage on the shape of ridge.

The invention discloses a rock steep slope high-cantilever slope closing reinforcing structure and a construction method thereof, and aims to effectively solve the technical problems of difficult reinforcement of a high-cantilever steep slope roadbed and high investment. The reinforcing structure comprises reinforcing piles, supporting blocks, grouting anchor rod bodies, connecting beams, metal bolts, soil retaining plates and roadbed structures, wherein the reinforcing piles are arranged in a rock foundation outside the steep slope roadbed at intervals by a certain depth; the supporting blocks are vertically arranged at intervals along the inner sides of the reinforcing piles and are fixedly connected with the reinforcing piles, and pin penetrating holes are vertically reserved in the middle of the block bodies; the grouting anchor rod bodies are vertically and transversely arranged in a stepped rock slope body at intervals, and the outer sides of the anchor rods are exposed to a certain length; the inner ends of the connecting beams are placed on the stepped rock body and fixedly connected with the exposed ends of the grouting anchor rod bodies, the outer ends of the connecting beams are placed on the supporting blocks, and the same pin penetrating holes are reserved in the positions where the pin penetrating holes are reserved in the supporting blocks; the metal bolts are arranged in the reserved pin penetrating holes on the connecting beams and the supporting blocks; the soil retaining plates are arranged on the inner sides between every two adjacent reinforcing piles;and the roadbed structures are arranged on the inner sides of the reinforcing piles and the soil retaining plates in a layered mode.

The invention relates to an anchor rod combined anti-floating system. The anchor rod combined anti-floating system comprises a plurality of main anti-floating anchor rod assemblies, and the adjacent main anti-floating anchor rod assemblies are connected through channel steel purlines; and each main anti-floating anchor rod assembly comprises a drill hole, an anchor rod body, a polygonal base plate, a conventional base plate and a plurality of I-shaped cushion blocks, wherein an anchor rod hole is formed in the middle of the polygonal base plate and the middle of the conventional base plate, the anchor rod body is arranged in the anchor rod hole in a penetrating mode, and the I-shaped cushion blocks are assembled between the polygonal base plate and the conventional base plate. The anchor rod combined anti-floating system is simple in structure and ingenious in design, has the characteristics of being low in construction cost, good in structural reliability, high in adaptability and the like, and has good construction convenience.

The invention discloses a composite foundation structure applicable to an offshore wind power plant fan and a construction method. The composite foundation structure comprises a steel pipe pile, corefilling concrete and a plurality of pre-stressed anchor cables, wherein the bottom end of the steel pipe pile penetrates into a bearing layer of the offshore foundation; the core filing concrete is poured into the steel pipe pile and placed on the bearing layer; and the top ends of the pre-stressed anchor cables are anchored on the inner wall of the steel pipe pile, and the bottom ends penetrate through the core filling concrete and are embedded in a micro-weathered rock layer of the offshore foundation. According to the composite foundation structure formed by effectively combining the steelpipe pile, the core filling concrete and the pre-stressed anchor cables, and the parts cooperatively work to bear the vertical force, the horizontal force and the bending moment caused by the horizontal force of the upper and lower structure together, thereby ensuring the bearing capacity and stability requirements of the foundation structure on the one hand, and reducing the buried depth of the steel pipe pile and reducing the construction difficulty and the construction cost on the other hand.

The invention provides a vehicle blocking device. The vehicle blocking device comprises a buried box body, a first driving cylinder, a gear, a second driving cylinder and a connecting rod mechanism, the gear is installed in the buried box body in a pivoted mode. An anti-collision stand column and a turnover door are pivotally mounted at a top opening of the buried box body; the lower end of the anti-collision stand column is connected with the gear. The output end of the first driving cylinder is provided with a rack meshed with the gear, the output end of the second driving cylinder is connected with one side of the turnover door through the connecting rod mechanism, and the first driving cylinder and the second driving cylinder are both installed in the buried box body. The anti-collision stand column can be erected in a rotating mode, so that the burying depth of the buried box body is reduced, in addition, due to the arrangement of the buried box body, all elements arranged in the buried box body are well protected, the waterproof and moistureproof capacity is improved, and the problems of short circuit and the like can be effectively avoided.