Abstract

Disclosed in the present invention is an inner and outer formwork trolley for a buried culvert of a concrete structure. The inner and outer formwork trolley comprises one outer formwork trolley and several inner formwork trolleys, wherein all the inner formwork trolleys are arranged in the outer formwork trolley in parallel. The outer formwork trolley comprises an outer formwork assembly, an outer gantry assembly, an outer translation mechanism and an outer traveling mechanism, wherein the outer formwork assembly comprises two side formworks which constitute a cross section, the two side formworks are each connected to an inner side of a side edge of the outer gantry assembly, and each side formwork is formed by connecting several boards by means of bolts; a telescopic end of the outer translation mechanism is connected to a cross beam of the outer gantry assembly; and the outer traveling mechanism is arranged at the bottom of the outer gantry assembly. The inner and outer formwork trolley for a buried culvert of a concrete structure of the present invention involves fast and efficient construction, implements synchronous structural concrete pouring on a side wall and a top plate, and saves 50% of time compared with the conventional full-hall formwork support construction method.

IPC Classes  ?

• E01F 5/00 - Draining the sub-base of roads or ballastway of railways by trenches, culverts, or conduits

Abstract

Disclosed in the present invention are a hydraulic tunnel open-cut structure external mold formwork and a construction method. The hydraulic tunnel open-cut structure external mold formwork comprises a plurality of external mold formworks longitudinally arranged along a central axis. Each external mold formwork comprises external molds A, external molds B, and external molds C which are respectively symmetrically arranged. The external molds A, the external molds B, and the external molds C are connected by means of bolts, and the external mold formworks longitudinally arranged along the central axis are connected by means of bolts. The upper portion of each external mold formwork is correspondingly connected to a group of back frames. A pair of vertical supports are symmetrically connected to two sides of each external mold formwork. According to the present invention, a working face is expanded from an under-cut working face to an open-cut working face, thereby providing spatial conditions for the working of large devices.

IPC Classes  ?

• E02D 29/05 - Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
• E02D 15/02 - Handling of bulk concrete specially for foundation purposes
• E02B 9/06 - Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates
• E03F 3/06 - Methods of, or installations for, laying sewer pipes

Abstract

Disclosed in the present invention is a construction method for the replacement in stages of combination turnouts in large marshalling yards of operation lines. In the method, a combination turnout is divided into a plurality of new turnouts, and key-point construction is carried out in stages. The method specifically comprises the following steps: 1) surveying and laying out a replacement area; 2) pre-laying turnouts, wherein a plurality of new turnouts are laid on an outer side of an existing line; 3) dismantling existing line or existing turnouts, wherein existing line or existing turnouts within the range of turnouts requiring replacement are dismantled; 4) interposing and laying components of new turnouts, wherein the new turnouts within the range of those requiring replacement are moved to designated positions, and transition rails are laid according to the dismantling range to connect existing lines before and beyond each new turnout; 5) sequentially connecting the turnouts from front to rear, wherein after a new turnout is in place, said new turnout and the existing lines before and beyond same are finely adjusted to meet line opening requirements, and then opening the new turnout; and 6) repeating the above steps 3)-5) to lay and open other new turnouts. The present invention uses a staged replacement solution, which reduces the impact of turnout replacement work on transportation on existing lines.

IPC Classes  ?

• E01B 29/02 - Transporting, laying, removing, or renewing lengths of assembled track, assembled switches, or assembled crossings

Abstract

Disclosed in the present invention is a fixing device for a copper waterstop at a construction joint of an inverted siphon having a "three-pipe one-joint" concrete structure, comprising: an arc-shaped steel plate having one side connected to an internal formwork trolley as a whole, and the other side extending into a nose of a copper waterstop; an arc-shaped steel wing plate, comprising a first steel wing plate and a second steel wing plate which are perpendicularly fixed to a same side of the arc-shaped steel plate, wherein the first steel wing plate is tightly attached to the copper waterstop, and the second steel wing plate is flush with the top surface of the internal formwork trolley; a rectangular connecting plate which is connected to the arc-shaped steel plate, the first steel wing plate, and the second steel wing plate as a whole; and a triangular connecting plate, having one cathetus connected to the second steel wing plate as a whole, and the other cathetus connected to the arc-shaped steel plate as a whole. The fixing device for a copper waterstop in the present invention is easy to install, has high installation precision and can be repeatedly used; thus, requirements for operators are reduced, materials such as square timbers and formworks are saved, the construction efficiency is improved, the process cycle time is shortened, and the problem of being difficult to control the deviation of copper waterstops in installation and pouring processes is effectively solved.

IPC Classes  ?

• E04B 1/68 - Sealings of joints, e.g. expansion joints
• E04G 21/18 - Adjusting tools; Templates
• E04G 13/00 - Falsework, forms or shutterings for particular parts of buildings, e.g. stairs, steps, cornices or balconies
• E04G 9/06 - Forming boards or similar elements the form surface being of metal
• E04G 17/04 - Connecting or fastening means for metallic forming or stiffening elements
• E21D 11/38 - Waterproofing; Heat insulating; Soundproofing; Electric insulating

Abstract

A method for transplanting a tree into a park square, the method comprising the following steps: step I, selecting a nursery-grown tree from a nursery-grown tree source, and lifting and packaging the nursery-grown tree in a timely manner; step II, disposing, at a position in a park square close to the boundary of the square, a transplanting device for transferring the nursery-grown tree into the park square, transporting the nursery-grown tree to a road at the boundary of the park square, using a crane to hoist the nursery-grown tree into the park square, and manually vertically fixing the nursery-grown tree in the transplanting device; step III, transporting the nursery-grown tree to a prepared tree pit, removing a net bag (23), lowering an upper frame (2) to put a soil ball into the tree pit, removing straw ropes, performing soil filling, arranging a tree bracket to support the nursery-grown tree, releasing the nursery-grown tree from a trunk support device, and removing the transplanting device; and step IV, performing post-stage nursing on the transplanted nursery-grown tree. By means of the method, there is no need to use large-scale carrying equipment and large-scale crane equipment in a park square for transplanting nursery-grown trees, and thus the damage caused by these pieces of large-scale equipment to brick surfaces of the park square can be avoided.

IPC Classes  ?

• A01G 23/04 - Transplanting trees; Devices for grasping the root ball, e.g. stump forceps; Wrappings or packages for transporting trees
• A01G 23/02 - Transplanting, uprooting, felling or delimbing trees

Abstract

Disclosed in the present invention is a through-type transverse slide rail construction basket for external wall construction of a building, the construction basket comprising: a rear anchor rail, which horizontally surrounds an inner side surface of a reinforced concrete parapet; a main support beam, which is transversely arranged on a top edge of the reinforced concrete parapet, wherein a connecting seat is provided at an inner end of the main support beam, and a first steering member is provided at an outer end of the main support beam; an inclined brace, an upper inclined end of the inclined brace being connected to the connecting seat, and a lower inclined end of the inclined brace being connected to a fixing clip, which is snapped onto the rear anchor rail and slides horizontally; a support column, which is vertically arranged on the main support beam, wherein a second steering member is provided at an upper end of the support column; and a construction basket, which is located outside the reinforced concrete parapet and provided with an electric winch, wherein a traction steel wire rope is wound around the electric winch, and an outer end of the traction steel wire rope sequentially bypasses the first steering member and the second steering member and is then fixedly connected to the connecting seat. The present utility model has the advantages of ensuring that the main support beam can stably translate in the length direction of a reinforced concrete parapet, and thus easily achieving transverse movement and ascending-descending of the construction basket.

IPC Classes  ?

• E04G 3/30 - Mobile scaffolds; Scaffolds with mobile platforms suspended by flexible supporting elements, e.g. cables
• E04G 3/34 - Mobile scaffolds; Scaffolds with mobile platforms characterised by supporting structures provided on the roofs

Abstract

A construction formwork for an arc-shaped overhanging eave of a building. The construction formwork comprises a bottom formwork, end formworks and a side formwork, wherein the bottom formwork is supported below an overhanging eave by means of a scaffold, and the end formworks for the overhanging eave are correspondingly arranged at two ends of the bottom formwork; and the side formwork is arranged on an outer side of the overhanging eave, and two ends of the side formwork are correspondingly connected to end faces. The side formwork comprises a flexible formwork board, support rods and U-shaped connectors, wherein the plurality of support rods are distributed at equal intervals; any two adjacent support rods are connected by means of a U-shaped connector, and in response to the change in the degree of opening of the U-shaped connector under the action of an external force, the curvature of an arc corresponding to the side formwork correspondingly changes; and the flexible formwork board is tightly fitted to inner sides of the support rods and used for forming an outer arc-shaped face of the overhanging eave. The flexible formwork board is arranged on the inner sides of the support rods, and an outer arc-shaped face of an overhanging eave is formed by means of the flexible formwork board. The U-shaped connectors connect the support rods to each other, such that the degree of opening of the U-shaped connectors can be adjusted under the action of an external force, and when the openings of the U-shaped connectors change, the flexible formwork board can adapt to different arc-shaped curved faces.

IPC Classes  ?

• E04G 13/06 - Falsework, forms or shutterings for particular parts of buildings, e.g. stairs, steps, cornices or balconies for stairs, steps, cornices, balconies, or other parts corbelled out of the wall

Abstract

Disclosed in the present invention is a continuous-beam-support-method-based one-time cast-in-place construction method. The method comprises: laying box girder frameworks on a disk-lock-type full support; binding steel bars, pre-embedding corrugated pipes, and pouring concrete in the frameworks after all the frameworks are laid; then, mounting prestressed systems in the corrugated pipes; and finally, mounting steel arch ribs and suspenders, so that a bridge is constructed, wherein traction devices for assisting in the mounting of the prestressed systems are arranged in the corrugated pipes. When the bridge is constructed by the construction method of the present invention, one-time continuous concrete pouring is employed, and no construction joints are arranged, such that the aesthetics and the quality of a box girder are ensured; and the prestressed systems are mounted with the assistance of the traction devices during a construction process, preventing end portions of the prestressed systems and the corrugated pipes from coming into contact, thereby avoiding damage being caused to the corrugated pipes.

IPC Classes  ?

• E01D 21/00 - Methods or apparatus specially adapted for erecting or assembling bridges
• E01D 2/04 - Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type

Abstract

A large-section railway tunnel surrounding rock stability control method, comprising the following steps: step S1, using a soil strength device to measure the strength of soil in a tunnel; step S2, demarcating crushed areas of which soil strength is lower than a preset threshold and marking same as low-strength areas, and demarcating an area of which soil strength is higher than the preset threshold and marking same as a high-strength area; step S3, according to different strength parameters of the low-strength areas, calculating the amount of a grouting material needing to be grouted into the low-strength areas so as to reach the same strength, and grouting the corresponding amount of the grouting material into the low-strength areas; step S4, covering the surfaces of the low-strength areas with glass fiber cloths; and step S5, coating a concrete layer, and performing targeted grouting according to different strength of different crushed areas, so that the crushed areas having different strength are reinforced and then can reach consistent strength, and finally the purpose of uniformly strengthening the tunnel is achieved.

IPC Classes  ?

• E21D 11/10 - Lining with building materials with concrete cast in situ; Shuttering or other equipment adapted therefor

Abstract

A rubber rod drawing device for box girder prestressed pipelines. Rod drawing wheel groups are all arranged on a movable working platform and are distributed at intervals in a direction perpendicular to the drawing direction of rubber rods, and the rod drawing wheel groups respectively correspond to the rubber rods to be drawn. A jack for balancing the frictional resistance experienced by the rubber rod is provided between two adjacent rod drawing wheel groups, and a telescopic rod of the jack extends out of the movable working platform and abuts against an outer part of a prestressed pipeline. Each rod drawing wheel group is provided with two rows of rod drawing wheels, which are arranged in parallel and are distributed in the drawing direction of the rubber rod, wherein the rod drawing wheels are equipped with rod drawing wheel electric motors for driving same to rotate, the rotation axis of the rod drawing wheels is perpendicular to the extension axis of the rubber rod, and the peripheral edges of the two rows of rod drawing wheels in the same rod drawing wheel group respectively abut against two sides of the rubber rod. The jack is configured to abut against the outer part of the prestressed pipeline so as to balance the frictional resistance experienced by the rubber rod, thereby ensuring the stability and safety of the whole movable platform during usage.

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
• B28B 17/00 - SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER - Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping

Abstract

A bearing platform cofferdam system suitable for repairing a bridge pier of an existing bridge. The system comprises: a suspension mechanism, which is provided with a supporting frame arranged at the top of an existing bridge pier, a plurality of lifting appliances being provided on the supporting frame; and a cofferdam box body, which is provided with a steel structure prefabricated member arranged at the top of an existing open caisson foundation (G) and connected to a lifting appliance, and a cast-in-place bottom plate (2) connected to the existing bridge pier (M) and the existing open caisson foundation (G) in a sealed manner, wherein an anti-floating support (3) is provided between the cast-in-place bottom plate (2) and the supporting frame. The system has a stable structure, is safe and reliable, easy to construct, has a low material consumption and low cost, can not only serve as a cofferdam to isolate river water, but can also be used as a formwork for bearing platform construction, so that the construction cost is greatly saved on, the construction efficiency is improved, and the smooth proceeding of the overall replacement work of an existing bridge pier is effectively ensured.

IPC Classes  ?

• E01D 19/04 - Bearings; Hinges
• E01D 22/00 - Methods or apparatus for repairing or strengthening existing bridges

Abstract

A curtain wall construction platform, which comprises a bearing plate and at least two sets of support units arranged side-by-side between building levels; each support unit comprises a first vertical rod and a second vertical rod that are arranged perpendicular on a building level floor as well as a support arm perpendicularly connected to the first vertical rod and the second vertical rod, the support arm extending out from the building level floor and approaching a window frame upper edge between building levels; the top end of the first vertical rod abuts against the building level ceiling, and the bearing plate is arranged on adjacent support arms and overhangs a portion of the building level floor. By means of the first vertical rod and the second vertical rod being arranged between building levels and used for lifting the support arms to a set height, and further by means of erecting the bearing plate on a portion of the support arms overhanging the floor, a platform for construction workers to construct a curtain wall is formed, operations by the construction workers are facilitated, construction efficiency and construction quality are improved, and the problems in prior curtain wall construction where a high altitude boom lift is utilized or scaffolding is erected, construction work is time consuming and labor intensive, construction costs are high, and construction quality is poor are prevented.

IPC Classes  ?

• E04G 3/18 - Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by cantilevers or other provisions mounted in openings in the building, e.g. window openings

Abstract

An integral hoisting device for a beam transportation vehicle. The integral hoisting device for a beam transportation vehicle comprises: a hoisting frame, which is provided with a plurality of locating discs, the plurality of locating discs being uniformly distributed in the circumferential direction of the hoisting frame; a plurality of locating plates, one end of each locating plate being in one-to-one correspondence with the plurality of locating discs, the matched locating plates and locating discs being rotatably connected to each other, and the other end of each locating plate being connected to steel cables for hoisting the beam transportation vehicle; and a connecting frame, which is fixedly connected to the beam transportation vehicle and is detachably connected to the hoisting frame. Therefore, the hoisting efficiency of the beam transportation vehicle is significantly improved, and the hoisting time of the beam transportation vehicle is shortened.

IPC Classes  ?

• B66C 1/12 - Slings comprising chains, wires, ropes, or bands; Nets
• B66C 13/06 - Auxiliary devices for controlling movements of suspended loads, or for preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads

Abstract

A mounting device for a hoisting rod pallet and a hoisting rod nut of a girder crane. In the mounting device, one end of a support beam is connected, by means of a fixing plate, to a spreader of a girder crane for hoisting a box girder, and the other end of the support beam is welded to a vertical sleeve; one end of a lower cross beam is connected to a lower end of a telescopic upright post and is rotatable, and the other end of the lower cross beam is connected to a bracket; after the lower cross beam rotates 90 degrees along an axis of the telescopic upright post, the lower cross beam, the support beam and the telescopic upright post together form a frame in the shape of Chinese character "匚"; and the sleeve and the telescopic upright post are arranged in a sleeved manner and can move relative to each other in a vertical direction, so as to drive the bracket to move up and down in the vertical direction. Therefore, after a pallet and a hoisting rod nut are in place, the lower cross beam drives the bracket to rotate 90 degrees, so that the pallet and the hoisting rod nut are moved to be below a hoisting rod inside a box girder; then, the sleeve and the telescopic upright post move relative to each other in the vertical direction, so as to adjust a supporting height of the bracket; and the pallet and the hoisting rod nut are lifted upwards. In this way, there is no need for carrying and lifting by the operator, and therefore the burden on the operator is effectively reduced.

IPC Classes  ?

• B66C 1/22 - Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks

Abstract

A positioning reinforcing mesh for a prestressed duct, and a construction method therefor, which relate to the technical field of prefabrication construction of box girders of high-speed railways. The positioning reinforcing mesh for a prestressed duct comprises: two bottom-plate positioning steel bars, which are parallel to a bottom plate of a box girder, and two web-plate positioning steel bars, which are parallel with a web plate, wherein one end of each bottom-plate positioning steel bar is fixedly connected to the bottoms of the web-plate positioning steel bars; and a plurality of bottom-plate prestressed duct mesh holes are arranged between the two bottom-plate positioning steel bars, and a plurality of web-plate prestressed duct mesh holes are arranged between the two web plate positioning steel bars. By means of the construction method based on a positioning reinforcing mesh for a prestressed duct in the present invention, a prestressed reinforcing mesh can achieve accurate positioning, and is fixed firmly, thereby having high construction efficiency.

IPC Classes  ?

• B28B 23/02 - 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
• 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
• B28B 7/00 - Moulds; Cores; Mandrels