61results about How to "Reduce settlement difference" patented technology

The invention discloses a roadbed reinforcement structure for preventing vehicle bump at bridge head, comprises an anti-settling plate arranged at the middle position of the bridge abutment and the backfill area behind the bridge abutment, wherein the anti-settling plate is connected with the bridge abutment rib plate through the brackets, a lower backfill area is arranged below the anti-settlingplate, an upper backfill area is arranged above the anti-settling plate, and a side of the anti-settling plate far away from the bridge abutment is a general roadbed backfill area. The invention alsodiscloses a construction method of a roadbed reinforcement structure for preventing vehicle bump at a bridge head. In the invention, the anti-settlement plate separates the backfill behind the abutment into two layers, reduces the height of the backfill behind the abutment, further reduces the settlement difference between the rigid abutment structure and the flexible embankment, strictly controlsthe compactness of the backfill on the abutment, thereby achieving the purpose of eliminating the uneven settlement between the abutment and the embankment, and effectively preventing the vehicle bump phenomenon at the bridge head.

The invention discloses a foundation treatment method of a collapsible loess slope cut-and-fill joint part. The cut-and-fill joint part of a constructed slope is subjected to foundation treatment by M cut-and-fill layers from top to bottom, and a cut-and-fill layer at the bottom of the M cut-and-fill layers is a bottom cut-and-fill layer. The foundation treatment method of the collapsible loess slope cut-and-fill joint part includes a bottom cut-and-fill layer foundation treatment step, a last cut-and-fill layer foundation treatment step and a once or twice repeating step. The bottom cut-and-fill layer foundation treatment step includes excavating a cut step, treating a soft cut foundation and a fill foundation, building a fill area soil body and constructing the cut-and-fill joint part, wherein the construction process of the cut-and-fill joint part includes mounting a geogrid and constructing a rigid connection framework. The once or twice repeating step includes repeating the former two steps until the foundation treatment process of the M cut-and-fill layers is completed. The foundation treatment method is simple in steps, convenient to implement, good in foundation treatment effect and capable of solving the problem that joint effect of cutting and filling of the existing collapsible loess slope cut-and-fill joint part is poor and differential settlement of the cut-and-fill joint part is easy to cause and the like.

The invention discloses a method for treating foundation by combined hammers. Three hammer bodies, including a column hammer, a middle hammer and a flat hammer which are of different shapes, intensities of pressure and specific gravities, are utilized for tamping loose foundation soil layer by layer according to certain programs and technical requirements, so as to realize the aim of consolidating the foundation soil in deep, middle and superficial layers. Compared with the common heavy-tamping method and other pile work composite foundation treatment methods, the method of the invention can make the effective consolidation depth and the reinforced effect of compacting soil among piers prominent and can treat the loose and soft foundation soil of which the thickness reaches nearly 20 meters, the depth and the diameter of a tamped pit can be respectively adjusted, and the tamped pit can be backfilled with original soil or other replacement materials to form a tamped pier or a replacement pier; and therefore the bearing capacity of the foundation can be greatly improved, and the settling amount and the differential settlement of buildings can be directly reduced. The method can fully utilize various on-site soil materials and utilize huge amounts of waste skeletal materials of construction waste from city removal, reduce the cost of treating the foundation and save high energy consumption materials (rolled steel products and cement), and has obvious effects of environment protection and energy conservation.

The extradeep extruding and ramming method includes leveling ground, the first spot ramming, the second spot ramming and final widespread ramming. The said reinforcing ramming process can raise effect strengthening depth by over one time without needing raising single-ramming power and elevating power of rammer compactor, raise foundation strength and stability, decrease settling volume, raise bearing capacity and reach the effects of extradeep extrusion and deep replacement. The present invention provides simplest construction method for reinforcing deep soft ground.

The invention discloses a subway foundation pit deep-buried karst cave treatment method, and relates to the field of foundation pit karst cave construction. The treatment method comprises the following steps: S1, carrying out construction preparation work, specifically, mastering and knowing the karst grouting project general situation of a construction area, and carrying out construction site leveling, surveying and setting out and settlement observation pile arrangement; S2, carrying out a process test, determining a filling material and a grouting material of the karst cave and proportioning parameters of the grouting material, selecting a proper filling material, and preparing grouting slurry; S3, carrying out drilling construction, and carrying out construction edge detection on the karst cave to determine the type of the karst cave and the position of a hole; S4, carrying out grouting construction; and S5, carrying out hole sealing, specifically, cleaning a sleeve valve grouting pipe, installing a sealing device at the end of the hole, and after the grouting quality of the karst cave is checked to be qualified, carrying out hole sealing and treatment on the karst cave. According to the method, 'head falling' and 'collapse' of shield construction can be prevented, excessive ground surface settlement or collapse accidents can be prevented, post-construction settlement difference is reduced, and operation safety is met.

The invention provides a construction method of a super high-rise building reinforced layer steel structure outrigger truss, belonging to the technical field of construction engineering. The method comprises the steps of construction preparation, outrigger truss processing and pre-assembly, outrigger truss lower chord member installation, floor concrete pouring, outrigger truss upper chord installation, web member installation, wall column steel bar binding, wall column formwork erection, beam plate formwork erection and steel bar binding, beam plate column concrete pouring, stress monitoring and analysis, web member post-welding, finishing coat and fire-proof paint brushing. According to the construction method of the super high-rise building reinforced layer steel structure outrigger truss, the whole truss is decomposed into parts and components which can be hoisted by field lifting equipment by utilizing the connection relationship of all rod pieces of the outrigger truss, so that integral hoisting is changed into high altitude bulk, the difficulty that the outrigger truss needs to be lifted by a large crane is overcome, and the construction is better in flexibility and operability.

The invention relates to a miniature vertical-oblique combined pile for a power transmission tower. The miniature vertical-oblique combined pile comprises standing columns, bearing platforms, a connecting beam and miniature piles. One standing column is disposed in the middle of the top end of each bearing platform. The adjacent bearing platforms are connected through the connecting beam. The miniature piles are evenly disposed at the bottom of each bearing platform. The miniature vertical-oblique combined pile has the advantages that the bearing platforms are connected into an integral structure by the connecting beam, force borne between the bearing platforms is coordinated, sedimentation difference between foundations can be reduced, and destroying of the power transmission tower on the upper portion due to uneven sedimentation of several tower legs is avoided; by the miniature vertical and oblique piles, the requirements of pressure resistance, pulling resistance and overturn resistance are satisfied, horizontal force resistance is increased, force bearing performance by completely using the vertical piles can be improved effectively, and foundation deformation under complex loads is reduced.

The invention provides an active comprehensive load reduction structure and method for a high-fill roadbed culvert. The load reduction structure comprises a culvert, a load reduction groove and a pressurization type self-adaptive system. The culvert is arranged on a foundation and comprises a culvert base plate, culvert side walls arranged at the two ends of the culvert base plate and a culvert cover plate. The load reduction groove is fixed to the top of the culvert cover plate, and the load reduction groove is filled with a light flexible material. Earth-stone side walls are arranged on thetwo sides of the culvert correspondingly, and the tops of the earth-stone side walls protrude out of the load reduction groove. The pressurization type self-adaptive system comprises a single-chip microcomputer, a plurality of pressure sensors and a plurality of jacking and stretching devices. The single-chip microcomputer is arranged in the culvert, and the multiple pressure sensors are arrangedat the position where stress on the top of the culvert is concentrated and electrically connected with the single-chip microcomputer. The jacking and stretching devices are electrically connected withthe single-chip microcomputer and used for initial jacking of the bottom of the upper wall and later stress adjustment. The technical scheme provided by the invention has the beneficial effects thata load reduction effect is obvious, acontrollable stress of the culvert can be realized, and data support is provided for scientific research in related fields.

The invention discloses a structure of apparatus and buttress integrated foundation in a steam turbine room; the structure comprises a raft; a pad layer is arranged below the raft; plain fills for backfilling after all the apparatus and buttress integrated foundation in the steam turbine are constructed, are arranged above the raft. With the adoption of the basic structure of the integrated raft, the repeated construction problem that the earth has to be excavated and backfilled for multiple times when needing to change and enlarge the apparatus and buttress integrated foundation in the steam turbine, is avoided; the unnecessary waste in the construction is avoided, the construction cost is saved, and the construction period is shortened. And the foundation structure using the above integrated raft further can effectively reduce the differential settlement between the foundations of the apparatus.

The invention discloses a combined-rammer construction technology for foundation treatment. In the construction technology, a plurality of rammers with different diameters, shapes and pressure intensities are adopted and combined reasonably, and replacement or compacted pier bodies are formed through deep-layer compaction, middle-layer compaction and superficial-layer compaction in virtue of different dynamical pressure equivalents produced by the different rammers, so as to achieve the purpose of improving the effective reinforced depth of a soil body and the bearing capacity of a foundation; and the soil among piers are reinforced and compacted effectively under the action of lateral compression generated during the construction of the pier bodies. The construction technology is the third-generation foundation treatment technology adopting dynamic compaction and dynamic compaction replacement methods, not only gives full play to the technological advantages of a traditional dynamic compaction (replacement) method and a novel pillar-rammer dynamic compaction (replacement) method, but also is developed to a new height, and becomes a fire-new construction technology which is suitable for various soft foundations and has a better reinforcement treatment effect.

The invention discloses a stone floor system and a construction method thereof, relates to the field of building decoration, and aims to solve the problem of higher influence on stone floor pavement flatness by self weight and dry humidity of cement mortar in the prior art. The stone floor system is characterized by comprising a gravel leveling layer, a cement pulp layer and a floor layer; and thefloor layer comprises multiple floors. The stone floor system further comprises a leveling mechanism; the leveling mechanism comprises a lower bearing plate, butting columns and upper pressing plates; the two ends of the lower bearing plate are in butt joint with the lower parts of two adjacent floors at the same time; the butting columns are positioned between two adjacent floors; the lower endsof the butting columns are in butt joint with a base layer ground, and the upper ends extend out planes of upper surfaces of the floors and are transversely provided with through holes; the upper pressing plates penetrate through the through holes; and the two ends are in butt joint with the upper surfaces of two adjacent floors. The stone floor system and the construction method thereof can reduce the troubles caused by self weight of stones and the dry humidity of the cement mortar, and improve the overall flatness of the floors.

The invention discloses a rib column distributed turnout foundation structure for a middle-low speed magnetic levitation low-arranged line. The rib column distributed turnout foundation structure for the middle-low speed magnetic levitation low-arranged line comprises turnout zone foundation treatment reinforced concrete rafts, reinforced concrete turnout beam bar-type rib column foundations, reinforced concrete cast-in place piles, steel plates and embedded bolts. The turnout zone foundation treatment reinforced concrete rafts are arranged horizontally, and the multiple reinforced concrete cast-in place piles are arranged at the bottom end faces of the turnout zone foundation treatment reinforced concrete rafts; the reinforced concrete cast-in place piles penetrate a soft stratum to extend into a bearing stratum, to decrease the deformation of turnout beams in the rotation process. The rib column distributed turnout foundation structure for the middle-low speed magnetic levitation low-arranged line ensures that the turnout beams are not deformed greatly in the rotation process due to inadequate foundation stiffness, and meets the requirements for foundation strength and stability by the turnout beams.

The invention relates to a frame and spring combination type bridge and road transition section structure integrated with a bridge abutment. The frame and spring combination type bridge and road transition section structure comprises the bridge abutment, a beam and a subgrade body and further comprises a steel reinforced concrete transition section frame and a plurality of high-strength spring bundles. The steel reinforced concrete transition section frame comprises a prefabricated horizontal steel reinforced concrete plate and a prefabricated oblique steel reinforced concrete supporting plate. The prefabricated horizontal steel reinforced concrete plate is connected with the upper end of the bridge abutment through a first high-strength hinged bolt, the prefabricated oblique steel reinforced concrete supporting plate is connected with the lower end of the bridge abutment through a second high-strength hinged bolt, and the other end of the prefabricated horizontal steel reinforced concrete plate is connected with the other end of the prefabricated oblique steel reinforced concrete supporting plate through a third high-strength hinged bolt. The prefabricated oblique steel reinforced concrete supporting plate is fixedly attached to the subgrade body. The high-strength spring bundles are vertically installed between the prefabricated horizontal steel reinforced concrete plate and the prefabricated oblique steel reinforced concrete supporting plate. The frame and spring combination type bridge and road transition section structure solves the problem that a sedimentation difference is caused by a rigidity difference between special-shaped buildings in a transport line.

The invention discloses a construction method for solving the problem of vehicle bump at a bridge head. The construction method comprises the following steps: arranging a connecting structure which comprises cement flyash gravel (CFG) piles, a soil filling structure, a cemented soil grouting treatment zone and geonets; sequentially leveling and compacting the original road bed under the soil filling structure through vibration; laying the CFG piles under the soil filling structure; laying the geonets and the soil filling structure from bottom to top from the bottom layer; and grouting and curing cemented soil to finish the whole construction process. The method disclosed by the invention has simplicity of operation, can greatly reduce the maintenance cost in bridge head treatment of a road construction administration section, effectively decreases the problems of vehicle bump at the bridge head, improves driving comfort and safety, has high construction quality, reduces the differential settlement between a bridge abutment and the original road bed to a large extent, and prolongs the service life of a road surface.

The invention discloses a framework, truss and high-strength spring combined bridge-road transition section structure integrated with a bridge abutment. The framework, truss and high-strength spring combined bridge-road transition section structure comprises a foundation, the bridge abutment, a beam body, a roadbed body, a framework transition section structure, a high-strength spring bundle and a reinforced concrete prefabricated truss member, wherein the framework transition section structure comprises a reinforced concrete prefabricated horizontal plate and a reinforced concrete prefabricated diagonal bracing plate; the reinforced concrete prefabricated horizontal plate and the upper end of the bridge abutment are connected by a bolt; the reinforced concrete prefabricated diagonal bracing plate and the lower end of the bridge abutment are connected by the other bolt; the other end of the reinforced concrete prefabricated horizontal plate and the other end of the reinforced concrete prefabricated diagonal bracing plate are connected by another bolt; a cavity is formed by the reinforced concrete prefabricated horizontal plate, the bridge abutment and the reinforced concrete prefabricated diagonal bracing plate; the reinforced concrete prefabricated truss member and the high-strength spring bundle are arranged in the cavity; the reinforced concrete prefabricated diagonal bracing plate is in contact with the roadbed body in an attaching manner; the roadbed body provides powerful support for a structure with a framework, a truss and a high-strength spring; the reinforced concrete prefabricated truss structure can be used for effectively controlling the settlement of a bridge-road transition area.

The invention provides a garbage pool bottom plate and unloading platform frame column foundation settlement difference treatment system and method. A garbage pool, a peripheral frame and an unloading platform are subjected to first-stage construction except the part of a connecting span of the unloading platform and the garbage pool; second-stage construction is conducted on the discharging platform and the garbage pool connecting span floor slab and the discharging platform and the garbage pool connecting span frame beam, and water injection pre-sedimentation treatment is conducted when the garbage pool is constructed to the preset height; the unloading platform and garbage pool connecting cross frame beam is supported at the top of a bracket on the side of a garbage pool frame column, and a rotating gap with a preset width is reserved between the unloading platform and garbage pool connecting cross frame beam and the garbage pool frame column; the unloading platform and the garbage pool connecting cross floor slab are supported at the tops of the lifting lugs on the side of the frame beam of the side wall of the garbage pool, and a rotating seam with a preset width is reserved between the unloading platform and the garbage pool connecting cross floor slab and the frame beam of the side wall of the garbage pool; according to the method, the construction period and cost of foundation treatment are saved, only the discharging platform is connected and spans in the second stage for construction in the water injection pre-pressing stage, continuous construction can be conducted in the garbage pool and other areas of the discharging platform, and the engineering construction period is shortened.