40results about How to "Control differential settlement" patented technology

The invention discloses a low implantation line double-wire section terminal spine type bearing rail beam limiting structure in medium and low speed magnetic levitation transportation engineering. The limiting structure comprises bearing rail beam lower subgrade filling, a bearing rail beam underlayer, two adjacent sections of bearing rail beams, vertical slab staggering prevention lapping plates, horizontal slab staggering prevention bosses and a bearing rail beam backfill material, wherein the vertical slab staggering prevention lapping plates are fixedly arranged on the bearing rail beam lower subgrade filling, and the lower ends of the vertical slab staggering prevention lapping plates stretch into the bearing rail beam lower subgrade filling. According to the invention, slab staggering prevention reinforced concrete lapping plates are arranged at bearing rail beam section positions, the bearing rail beam is arranged on the same reinforced concrete slab staggering prevention plate with a certain rigidity, and the problem that the rail surface is unsmooth due to differential settlement of the bearing rail beam lower subgrade is effectively solved.

The invention discloses an intra-segment limit structure for bearing-trail beams at a double-line section of a middle-low speed magnetic levitation traffic engineering low-laying line. The limit structure comprises roadbed stuffing below the bearing-trail beams, a bedding layer under the bearing-trail beams, two adjacent bearing-trail beams, vertical dislocation-prevention lapping plates, transverse dislocation-prevention bosses and bearing-trail beam backfill stuffing. The vertical dislocation-prevention lapping plates are fixedly arranged on the roadbed stuffing below the bearing-trail beams and the lower ends of the vertical dislocation-prevention lapping plates extend into the roadbed stuffing below the bearing-trail beams. According to the invention, the dislocation-prevention reinforced concrete lapping plates are arranged between the segment positions of the bearing-trail beams, the bearing-trail beams are arranged on the same reinforced concrete dislocation-prevention bedplate with certain rigidity, and thus the problem of the uneven rail surface as the foundation below the bearing-trail beams has differential settlements is effectively avoided.

The invention discloses a treatment structure of a high-water-level soft soil bridgehead roadbed that comprises buoyancy bodies that are arranged below the underground water level of a soft soil layerand are made of waterproof materials with the volume density not larger than 1.0 g / cm < 3 >, wherein the multiple buoyancy bodies are arranged in the passing direction of a road at intervals, and each buoyancy body is horizontally arranged in the width direction of the road; the upper portion of each buoyancy body is provided with one jacking pipe, the jacking pipes and the buoyancy bodies are horizontally arranged in the same direction, each jacking pipe is of a half-pipe structure with an opening in one side, and the openings of the jacking pipes are buckled to the upper surfaces of the buoyancy bodies; and a rigid connecting body is connected between the two adjacent jacking pipes. According to the treatment structure, a corresponding using method is adopted, differential settlement ofhigh-water-level soft foundation bridgehead roadbeds of a newly-built road and an existing road can be effectively treated, and the problem of bridgehead bumping caused by differential settlement issolved.

The invention belongs to the technical field of medium-low speed maglev traffic engineering low-set lines and discloses a medium-low speed maglev traffic engineering double-line filling section pile foundation support beam type rail bearing beam transition section structure. The transition section structure comprises multiple pile foundation bearing structures, a reinforced concrete support beam, reinforced concrete rail bearing beam base plates, two rows of reinforced concrete beam type structures, lower roadbed filler of a rail bearing beam, two-side backfill filler of the rail bearing beam, a bridge abutment, a trapezoid filling body and end walls, wherein the reinforced concrete beam type structures are connected to the top ends of the reinforced concrete rail bearing beam base plates in a supported mode, and the two-side backfill filler of the rail bearing beam is supported by the lower roadbed filler of the rail bearing beam. The transition section structure is higher in long-term stability, the high requirement for rail bearing beam structural deformation and post-construction settlement is met, the requirement for long-term stability, durability and construction quality controllability of a foundation bed is met, and smooth transition between a maglev elevated structure and a low-set line transition section F rail is effectively achieved.

The invention discloses a highway widened subgrade structure, comprising an original subgrade, the slope of the original subgrade is provided with a number of steps, fixed piles are arranged longitudinally on the upper part of the steps, and connecting components are arranged between the fixed piles; A new roadbed is arranged on the top surface of the fixed pile, and the new roadbed is fixedly connected with the original roadbed; a filler layer is arranged between the new roadbed and the original roadbed, and the filler layer is fixedly connected with the fixed pile. The highway widened subgrade structure and the construction method thereof provided by the invention are simple in construction and high in construction efficiency, and the original subgrade and the new subgrade are effectively combined through fixed piles, connecting components and reinforcing layers, thereby reducing the occurrence of occurrences between the new subgrade and the original subgrade. The probability of sideslip is reduced, and the new roadbed instability, road surface damage, uneven settlement at the junction of the new and old roadbeds, and overall performance decline in the widened expressway are reduced. It has important theoretical significance and practical value.

The invention belongs to the technical field of low lines of medium-low speed maglev transportation engineering, and discloses an independent pier column type rail bearing beam structure at a double-line excavating section of the medium-low speed maglev transportation engineering. The independent pier column type rail bearing beam structure comprises a plurality of pile foundation bearing structures, a reinforced concrete rail bearing beam bottom plate, two rows of reinforced concrete beam-type structures and backfill materials on the two sides of a rail bearing beam; the top part of each pile foundation bearing structure is connected with the reinforced concrete rail bearing beam bottom plate; the top end of the reinforced concrete rail bearing beam bottom plate is connected with the reinforced concrete beam-type structures; drainage ditches are formed beside the backfill materials on the two sides of the rail bearing beam; a drainage slope is formed on the side, far away from the backfill material on each of the two sides of the rail bearing beam, of the corresponding drainage ditch. According to the independent pier column type rail bearing beam structure at the double-line excavating section of the medium-low speed maglev transportation engineering, high requirements of a rail structure of the medium-low speed maglev transportation engineering on deformation and post-construction settlement of a rail bearing beam structure can be met; the requirements for long-term stability, durability and construction quality controllability of a foundation bed can also be met; moreover, the economic property is higher.

The invention belongs to the technical field of medium-low speed maglev traffic engineering low arrangement lines and discloses a medium-low speed maglev traffic engineering double-line excavation section pile foundation combined type rail bearing beam structure. The medium-low speed maglev traffic engineering double-line excavation section pile foundation combined type rail bearing beam structure comprises a plurality of first pile foundation bearing structures, a pile foundation support beam combined bearing structure, two rows of reinforced concrete rail bearing beam base plates, two rows of reinforced concrete beam type structures and rail bearing beam two-side backfill filler. The top end of each first pile foundation bearing structure is connected with the corresponding reinforced concrete rail bearing beam base plate in a bearing mode. The top ends of the reinforced concrete rail bearing beam base plates are connected with the reinforced concrete beam type structures in a bearing mode. A drainage ditch is arranged beside the rail bearing beam two-side backfill filler and is provided with a drainage slope. According to the medium-low speed maglev traffic engineering double-line excavation section pile foundation combined type rail bearing beam structure, the requirements of a medium-low speed maglev traffic engineering rail structure for deformation of the rail bearing beam structure and high post-construction settlement can be met, the requirements of long-term stability, durability and construction quality controllability of a foundation bed can also be met, and the economy is better.

The invention belongs to the technical field of medium-low speed maglev traffic engineering low arrangement lines and discloses a medium-low speed maglev traffic engineering double-line excavation section independent pier column type rail bearing beam transition segment structure. The medium-low speed maglev traffic engineering double-line excavation section independent pier column type rail bearing beam transition segment structure comprises pile foundation bearing structures, reinforced concrete rail bearing beam base plates, two rows of reinforced concrete beam type structures, rail bearing beam two-side backfill filler, a bridge abutment and an end wall. The top ends of the pile foundation bearing structures are connected with the reinforced concrete rail bearing beam base plates in a bearing mode. The top ends of the reinforced concrete rail bearing beam base plates are connected with the reinforced concrete beam type structures in a bearing mode. A first drainage ditch is arranged beside the rail bearing beam two-side backfill filler. The side, far away from the rail bearing beam two-side backfill filler, of the first drainage ditch is provided with a first drainage slope. According to the medium-low speed maglev traffic engineering double-line excavation section independent pier column type rail bearing beam transition segment structure, the long-term stability is better. The high requirements for deformation of the rail bearing beam structure and post-construction settlement are met, the requirements of long-term stability, durability and construction quality controllability of a foundation bed are also met, and the smooth transition of a maglev elevated structure and a low arrangement line transition segment F rail is achieved effectively.

The invention belongs to the technical field of low-embedded lines of medium-low speed magnetic levitation traffic engineering and discloses an independent pier stud type bearing rail beam structure at fill sections of double lines in medium-low speed magnetic levitation traffic engineering. The structure comprises pile foundation bearing structures, reinforced concrete bearing trail beam baseboards, two rows of reinforced concrete beam structures, under-bearing trail beam roadbed filler and bearing trail beam either side backfill filler. Multiple pile foundation bearing structures are arranged; the reinforced concrete beam structures are borne on the tops of the reinforced concrete bearing trail beam baseboards; and the bearing trail beam either side backfill filler is borne by the under-bearing trail beam roadbed filler. The defects of traditional bearing rail beam structures of low-embedded lines can be overcome, the long-term stability is better, the high requirements for distortion and post-construction settlement of bearing trail beam structures of track structures in medium-low speed magnetic levitation traffic engineering are met, the requirements for long term stability and durability of foundation beds as well as controllability of construction quality are met, and the economical efficiency is better.

The invention discloses snowflake steel sheet piles and a machining and construction method thereof. Each steel sheet pile comprises a pile body, supporting plates located at the upper end of the pilebody and a pile cap located at the top end of the pile body. The snowflake steel sheet piles are built in sections, and steel plates are laid on the steel sheet piles after building the snowflake steel sheet piles to enable pile groups to be connected integrally. Compared with the prior art, the snowflake steel sheet piles and the machining and construction method thereof have the advantages that(1) the bearing capacity of pile shafts is increased by the snowflake pile bodies; (2) the whole stiffness of the steel sheet piles is enhanced by an axisymmetric star design, and pile deformation iscontrolled effectively; (3) the arranging positions of the supporting plates conform to the law of stress diffusion of soil around the piles to be conductive to enabling the pile shafts to be stressed fully and enable the pile shafts to reach a small settlement; (4) the snowflake steel sheet piles are built at the bridge head of a highway bridge which is opened to traffic, the steel plates are laid at the tops of the piles, and differential settlement of the bridge head can be effectively controlled; and (5) the steel sheet piles are built in sand soil and soft soil areas by a crane, the steel plates are laid on the steel sheet piles, heavy machinery can enter quickly, the construction period is shortened, and the engineering efficiency is improved.

The invention belongs to the technical field of medium- and low-speed maglev traffic engineering low-lying circuits and discloses a medium- and low-speed maglev double-line filled section pile foundation combined bearing rail beam transition segment structure, comprising a plurality of first pile foundation bearing structures, a pile foundation joist combined bearing structure, a reinforced concrete bearing rail beam bottom plate, two rows of reinforced concrete beam structures, bearing rail beam lower roadbed filling, bearing rail beam bilateral backfill, a bridge abutment, a trapezoidal filling mass and an end wall; the top end of the reinforced concrete bearing rail beam bottom plate bears the reinforced concrete beam structures, and the bearing rail beam bilateral backfill is borne through the bearing rail beam lower roadbed filling. The structure has better long-term stability, meets the high requirement on deformation and post-construction settlement of bearing rail beam structures, also meets the requirements on foundation bed long-term stability and durability and construction quality controllability, and enables effective smooth transition between a maglev elevated structure and a low-lying circuit transition segment F rail.

The invention belongs to the technical field of medium-low speed maglev traffic engineering low-set lines and discloses a medium-low speed maglev traffic engineering double-line filling section pile foundation support beam type rail bearing beam transition section structure. The transition section structure comprises multiple pile foundation bearing structures, a reinforced concrete support beam, reinforced concrete rail bearing beam base plates, two rows of reinforced concrete beam type structures, lower roadbed filler of a rail bearing beam, two-side backfill filler of the rail bearing beam, a bridge abutment, a trapezoid filling body and end walls, wherein the reinforced concrete beam type structures are connected to the top ends of the reinforced concrete rail bearing beam base plates in a supported mode, and the two-side backfill filler of the rail bearing beam is supported by the lower roadbed filler of the rail bearing beam. The transition section structure is higher in long-term stability, the high requirement for rail bearing beam structural deformation and post-construction settlement is met, the requirement for long-term stability, durability and construction quality controllability of a foundation bed is met, and smooth transition between a maglev elevated structure and a low-set line transition section F rail is effectively achieved.

The invention belongs to the technical field of medium-low speed maglev traffic engineering low arrangement lines and discloses a medium-low speed maglev double-line excavation section pile foundation support beam separate width type rail bearing beam structure. The medium-low speed maglev double-line excavation section pile foundation support beam separate width type rail bearing beam structure comprises a plurality of pile foundation bearing structures, a reinforced concrete support beam, two rows of reinforced concrete rail bearing beam base plates, two rows of reinforced concrete beam type structures and rail bearing beam two-side backfill filler. The tops of the reinforced concrete rail bearing beam base plates are connected with the reinforced concrete beam type structures in a bearing mode. The rail bearing beam two-side backfill filler achieves bearing connection through rail bearing beam lower roadbed filler. According to the medium-low speed maglev double-line excavation section pile foundation support beam separate width type rail bearing beam structure, the defects of a traditional low arrangement line rail bearing beam structure can be avoided, the long-term stability is better, the high requirements of a medium-low speed maglev traffic engineering rail structure for deformation of the rail bearing beam structure and post-construction settlement are met, the requirements of long-term stability, durability and construction quality controllability of a foundation bed are also met, and the economy is better.

The invention provides a cascading waterfall waterscape structure on an artificial stacked mountain and a construction method of the cascading waterfall waterscape structure, belonging to the field of a garden engineering technology, and aiming at solving the problem that in the existing cascading waterfall waterscape engineering, water leakage is caused due to the settlement of the artificial stacked soil body, so that the quality of the engineering can be influenced. The cascading waterfall waterscape structure comprises a pool body and a riverbed which are connected with each other; the artificial stacked mountain sequentially comprises a base layer, a common planting soil layer and a high-quality planting soil layer from bottom to top, wherein the base layer is built by construction waste which does not contain pollutant and radioactive substances. The construction method comprises the steps of 1, stacking and tamping the base layer, the common planting soil layer and the high-quality planting soil layer of the artificial stacked mountain in a layered way; 2, laying a middle coarse sand cushion layer, a geosynthetic clay liner and a plain concrete cushion layer from bottom to top layer by layer at the position of the pool body to build the pool body; 3, laying a middle coarse sand cushion layer, a geosynthetic clay liner and a plain concrete cushion layer from bottom to top layer by layer to form the riverbed; 4, building a reinforced concrete retaining wall I at the part where the pool body is connected with the riverbed; 5, building at least one reinforced concrete retaining wall II in the riverbed.

The invention discloses a method for determining stiffness matching of under-cross railway engineering. The method comprises the following steps that firstly, the engineering property of rock-soil bodies under a roadbed is determined, and then stiffness matching design is carried out in relevant areas with a tunnel as the center in the cross section direction of the tunnel. The method for stiffness matching design of shield under-cross railway engineering of soft soil areas is safe, reliable, scientific, reasonable and low in cost; through a reasonable partition scheme and the stiffness matching design, smooth transition of the structural stiffness is achieved, differential settlement of the roadbed can be effectively controlled, and safe operation of a train is guaranteed. The method guarantees stability of a tunnel face, and a shield is made to smoothly penetrate through the railway roadbed.

The invention belongs to the technical field of medium-low maglev transport engineering low circuits and discloses a combined rail-bearing beam structure for a double-line filling section pile foundation in medium-low maglev transport engineering. The combined rail-bearing beam structure comprises multiple first pile foundation bearing structures, a pile foundation supporting beam combined bearing structure, a reinforced concrete rail-bearing beam bottom plate, two rows of reinforced concrete beam structures, a roadbed filler under a rail-bearing beam and backfilling fillers on the two sides of the rail-bearing beam. The top end of the reinforced concrete rail-bearing beam bottom plate is connected with the reinforced concrete beam structures in a bearing mode; the backfilling fillers on the two sides of the rail-bearing beam are connected through the roadbed filler under the rail-bearing beam in a bearing mode. The combined rail-bearing beam structure can overcome the defect of a traditional low-circuit rail-bearing beam structure, is better in long-term stability, can meet the high requirements of the medium-low maglev transport engineering rail structure for rail-bearing beam structure deformation and post-construction settlement and the controllable requirements for long-term stability, durability and construction quality of a foundation bed, and is higher in economical efficiency.

The invention belongs to the technical field of middle / low-speed magnetic suspension traffic engineering low arrangement lines, and discloses a middle / low-speed magnetic suspension double-line filling section independent pier column type bearing rail beam transition section structure which comprises pile foundation bearing structures, reinforced concrete bearing rail beam bottom plates, two rows of reinforced concrete beam type structures, a roadbed filling under a bearing rail beam, backfill fillings on two sides of the bearing rail beam, a bridge abutment, a trapezoid filling body and end walls; the top ends of the reinforced concrete bearing rail beam bottom plates carry the reinforced concrete beam type structures; the backfill fillings on two sides of the bearing rail beam are carried by the roadbed filling under the bearing rail beam. The high / low-speed magnetic suspension double-line filling section independent pier column type bearing rail beam transition section structure is better in long-term stability, meets high requirements on bearing rail beam structure deformation and post-construction settlement, and meets the requirement of controllability on long-term stability, durability and construction quality of a foundation bed. According to the invention, one end, close to an elevated bridge, of each of the reinforced concrete bearing rail beam bottom plates is lap-jointed on the bridge abutment, so that the smooth transition of a magnetic suspension elevated structure and a low arrangement line transition section F rail is realized effectively.

The invention belongs to the technical field of medium-low speed maglev traffic engineering low-set lines and discloses a medium-low speed maglev traffic engineering double-line filling section pile foundation support beam type rail bearing beam structure. The rail bearing beam structure comprises multiple pile foundation bearing structures, a reinforced concrete support beam, reinforced concrete rail bearing beam base plates, two rows of reinforced concrete beam type structures, lower roadbed filler of a rail bearing beam and two-side backfill filler of the rail bearing beam, wherein the reinforced concrete beam type structures are connected to the top ends of the reinforced concrete rail bearing beam base plates in a supported mode, and the two-side backfill filler of the rail bearing beam is supported by the lower roadbed filler of the rail bearing beam. The rail bearing beam structure can overcome the defects of traditional low-set line rail bearing beam structures and is higher in long-term stability, the high requirement of a medium-low speed maglev traffic engineering track structure for rail bearing beam structural deformation and post-construction settlement is met, the requirement for long-term stability, durability and construction quality controllability of a foundation bed is met, and economical property is higher.

The invention relates to an improvement method for directly using high liquid limit soft soil as a prefabricated assembled roadbed filling material, which is characterized in that it comprises the following steps: adding quicklime powder, low-grade cement, Fly ash powder, and then according to the order of addition, stir at high speed respectively to obtain the first-stage initial mixture, and then perform the initial stuffing, then add polyacrylate emulsion, styrene-acrylic emulsion, and water-absorbing resin in sequence, perform secondary stuffing, and then add Rice straw, polystyrene foam emulsion, and water-absorbing resin are stuffed three times, and finally, a packaged block that meets the needs of road filling is packaged. Compared with the prior art, the present invention has the advantage that it solves the problem of using high The liquid limit soft soil is directly used for subgrade filling, which not only realizes the recycling of local resources, but also realizes the prefabricated assembly of the filling, and improves the overall strength and bearing capacity of the filling subgrade.

The invention discloses a construction method of a high-polymer grouting-reinforced antisettling widened roadbed. The method is characterized by arranging a geotechnical engineering pipe network; the geotechnical engineering pipe network is a rectangular grid composed of PVC (polyvinyl chloride) pipes arranged in an array mode; the PVC pipes in the rectangular grid communicate with each other; the inside of the geotechnical engineering pipe network is respectively provided with a grouting hole and a vent hole which extend convexly upwards, and a grout passing hole which extends convexly downwards; the geotechnical engineering pipe network is laid in the fill stratum to form the fill stratum geotechnical engineering pipe network; the high-polymer grout is injected into the fill stratum geotechnical engineering pipe network through the grouting hole to form the fill stratum grouted geotechnical engineering pipe network; and the high-polymer grout is also injected into the vertical column hole formed in the fill stratum through the grout passing hole to form the vertical reinforcing column. The method enhances the lateral communication between the new and old road embankments, and effectively controls the differential settlement, so that the new and old roadbeds are combined more firmly and can not easily slump.