Abstract

Provided is a rail structure. The rail structure comprises: prefabricated ballast bed assemblies, a plurality of prefabricated ballast bed assemblies being provided and arranged at intervals in a first predetermined direction; and a steel rail, the steel rail being fixedly arranged on the plurality of prefabricated ballast bed assemblies. Therefore, the problem in the prior art of a rail structure being difficult to maintain and repair is thus solved.

IPC Classes  ?

• E01B 2/00 - General structure of permanent way
• E01B 1/00 - BallastwayOther means for supporting the sleepers or the trackDrainage of the ballastway

Abstract

An improved process of an acid sulphate soil roadbed filling. An inorganic binder calcium carbonate is added to improve an acid sulphate soil and control the moisture content of a filling before blending, such that the acid sulphate soil can reach the requirements for compactness and strength and can be used for roadbed filling. When a road or railroad bed is built in an acid sulphate-rich area, the improved acid sulphate soil is effectively utilized as a roadbed filling, so that earth replacement filling and long-distance transportation and excavated material disposal are avoided to a great extent and earthwork engineering cost is saved.

IPC Classes  ?

• C09K 17/06 - Calcium compounds, e.g. lime
• C09K 103/00 - Civil engineering use
• C09K 109/00 - MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FORAPPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR pH regulation

Abstract

Provided is a bolted fastener assembly suitable for a heavy haul railway with an axle load of 35-40 tons. The bolted fastener assembly is composed of a T-shaped bolt (3), a nut (5), a flat washer (6), an elastic strip (4), an insulating gauge block (7), a railway subplate (2) and a pre-embedded iron base (1). The pre-embedded iron base (1) is embedded in advance in a concrete foundation, the T-shaped bolt (3) is mounted on the pre-embedded iron base (1) to fasten the elastic strip (4), the insulating gauge block (7) is provided between a steel rail and the pre-embedded iron base (1), and meanwhile left and right positions of the steel rail are adjusted by changing the insulating gauge blocks (7) of different thicknesses, and then the railway subplate (2) is provided under the railway to provide elasticity in a fastener system. Through the structure, all functions of an existing bolted fastener can be achieved, fewer parts are provided, the structure is simple, and maintenance operation is convenient.

IPC Classes  ?

• E01B 9/48 - Fastening the rail on the tie-plate by clamps by resilient steel clips
• E01B 9/30 - Fastening on wooden or concrete sleepers or on masonry with clamp members by resilient steel clips

Abstract

A steel-concrete composite beam structure suitable for a heavy haul railway. A steel main beam (3) is connected to a deck slab (2) by means of studs or shear studs (8). The steel main beam (3) adopts an I-shaped profile steel having a variable cross-section. The height of an end beam is less than that of an intermediate beam. The variable cross-section adopts arc transition. A lateral combination is provided between the I-shaped profile steels for connection. The composite beam is simple in structure and high in lateral rigidity, is convenient to maintain, and thus is suitable for different heights at piers.

IPC Classes  ?

• E01D 19/00 - Details of bridges

Abstract

A boltless fastener assembly suitable for a heavy-duty railway with an axle load of 35 to 40 tons. The boltless fastener assembly comprises a pre-embedded steel seat (1), an e-shaped elastic bar (2), an insulated rail gauge block (3), and a rubber spacer (4). A fastening and pressing arm end of the e-shaped elastic bar (2) is provided with an L-shaped blocking end (7). The pre-embedded steel seat (1) is improved with respect to the e-shaped elastic bar (2), and a hole (6) is provided in a portion of the pre-embedded steel seat (1) near the fastening and pressing arm end of the e-shaped elastic bar (2), such that the improved e-shaped elastic bar (2) can be mounted normally. During mounting, the L-shaped blocking end (7) of the e-shaped elastic bar (2) does not make contact with the pre-embedded steel seat (1), such that the mounting and force-bearing of the elastic bar (2) are not affected. When relatively large torsional deformation occurs on a steel rail, the L-shaped blocking end (7) on one side of the steel rail moves upwards and makes contact with an upper edge of the hole (6) of the pre-embedded steel seat, or the L-shaped blocking end (7) on one side of the steel rail engages with a second arm end (8) and generates a relatively large resistance force, so as to protect the steel rail against torsional deformation, thereby eliminating a situation in which the elastic bar (2) fails due to excessive deformation.

IPC Classes  ?

• E01B 9/48 - Fastening the rail on the tie-plate by clamps by resilient steel clips

Abstract

Disclosed is a fiber-reinforced prestressed reinforced concrete sleeper. The sleeper is integrally pouring molded and comprises: a sleeper body (3) and rail bearing areas (2), wherein steel rail clamping seats are arranged on the surfaces of the rail bearing areas (2), and there are two rail bearing areas (2) respectively located under a steel rail on two sides of the sleeper and located above the sleeper body (3). A fiber-reinforced material is only added into the rail bearing areas (2), reinforcement ribs are configured in the sleeper body (3) and the fiber-reinforced material is mainly disposed in a main stressed area under a steel rail bearing face. The fiber material is designed to be added into a specific area during the production of a concrete sleeper, thereby improving the wear-resistant property and the crack-resistant property of concrete, being well-adapted to a stressed condition of the sleeper, so that the service life of the concrete sleeper is increased and the stability of running of a railway is improved.

IPC Classes  ?

• E01B 3/28 - Transverse or longitudinal sleepersOther means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone
• E01B 3/32 - Transverse or longitudinal sleepersOther means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement
• E01B 3/34 - Transverse or longitudinal sleepersOther means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement with pre-tensioned armouring or reinforcement

Abstract

Disclosed is a corrugated plate assembly (100) for supporting for tunnels, comprising a plurality of corrugated plate units (110) connected to each other in the transverse and longitudinal directions. The longitudinal edge of each corrugated plate unit is provided with a first connecting plate (321) for connecting the corrugated plate units to each other in the longitudinal direction.

IPC Classes  ?

• E21D 11/15 - Plate liningsLaggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
• E01F 5/00 - Draining the sub-base of roads or ballastway of railways by trenches, culverts, or conduits

Abstract

A foam light soil railway subgrade structure. In the subgrade structure, a frame is constructed by using autoclaved aerated concrete blocks (6), and foam light soil (3) is poured into the frame, wherein the frame is constructed by using the autoclaved aerated concrete blocks (6) with the density of 400-500 kg/m3, the foam light soil (3) with the wet density of 550-600 kg/m3is poured to form an upper light soil (3) subgrade in the railway subgrade, and the foam light soil (3) with the wet density of 500-550 kg/m3 is poured to form a lower light soil (3) subgrade in the railway subgrade. Also provided is a construction method for the subgrade structure.

IPC Classes  ?

• E01B 2/00 - General structure of permanent way
• E01C 3/00 - Foundations for pavings

Abstract

Disclosed is a tensioning device for a prefabricated track slab, comprising: a side face tensioning mechanism (3), an end face tensioning mechanism (4), a power mechanism (2) connected to the side face tensioning mechanism (3) and the end face tensioning mechanism (4), and a control mechanism (1). In the tensioning device for the prefabricated track slab, a plurality of tensioning units are tensioned in the directions of end and side dies at the same time, so that the efficiency of tensioning is improved and the production cycle is shortened. Disclosed is a synchronous relaxation device for a pre-tensioned prefabricated track slab, comprising: an end relaxation mechanism (10), a side relaxation mechanism (20), a power mechanism (30) connected to the end relaxation mechanism (10) and the side relaxation mechanism (20), a control mechanism (40), and a die positioning device (50). The synchronous relaxation device for the pre-tensioned prefabricated track slab realizes the synchronous relaxation of a pre-stressed steel reinforcement in the longitudinal direction and the horizontal direction, so that the efficiency of relaxation is improved and the production cycle is shortened.

IPC Classes  ?

• B28B 23/04 - Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material wherein the elements are reinforcing members the elements being stressed

Abstract

A single bar same group automatic tensioning and locking device, comprising a tensioning beam (1) and a plurality of tensioning modules arranged in parallel, each tensioning module comprising a jack (2) and a tensioning rod (3), the jack (2) being mounted within the tensioning beam (1), the bottom of the jack (2) being fixed to the tensioning beam (1), the top of the jack (2) being connected to one end of the tensioning rod (3), the other end of the tensioning rod (3) extending out from the tensioning beam (1), the tensioning module also being provided with a force measurement sensor. The tensioning and locking device simultaneously carries out synchronous tensioning of single prestress steel bars, single bar independent sensors control a tensioning force, and the tensioning force is automatically locked after automatic tensioning has been carried out, so that a tensioning force value is uniform, stable and small in error, automatic machinery replaces manual operations, work accuracy and production yield are increased, and production costs are lowered.

IPC Classes  ?

• B28B 23/04 - Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material wherein the elements are reinforcing members the elements being stressed

Abstract

A wheel-rail vertical force continuous measuring method based on rail strain comprises the following steps: one section of the rail above a single sleeper is selected as an elastomer for measuring wheel-rail vertical force; two groups of appropriate strain outputs on a neutral axis of the elastomer are selected, slopes of all straight lines which are corresponding to different longitudinal action point positions of a induction region of the elastomer and determined by the strain outputs under two sleeper support reference states are obtained on the same vertical force strain output plane; the strain output of wheels passing through the induction region of the elastomer is measured, the longitudinal positions of the action points of the vertical force are identified, negative values which are corresponding to the slopes obtained are taken as combination factors, the combined strain output is obtained by combining the selected two groups of strain outputs, and the combined strain output is unrelated with the sleeper support state; and the vertical force is obtained by the combined strain output of the effective measuring region. A measuring device comprises an elastomer selecting unit (71), a strain selecting and parameter obtaining unit (72), a longitudinal position identifying and strain combining unit (73) and an output unit (74) which are connected.

IPC Classes  ?

• G01L 1/04 - Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs