Abstract

An anchorage system for the horizontal rotation of a cable, and a construction method. The anchorage system comprises an anchorage structure, transfer cable saddles, a main cable saddle and diverting cable saddles, wherein a cable rotation channel is provided in the anchorage structure; and the main cable saddle is arranged at the central axis of the top of the cable rotation channel, and the diverting cable saddles are fixedly arranged at the top of the cable rotation channel and are symmetrically distributed along the main cable saddle. The main cable saddle comprises a first main cable saddle and a second main cable saddle, the first main cable saddle and the second main cable saddle being axially connected by means of a force transmission mechanism; each diverting cable saddle comprises a cable saddle body; and a cable comprises a first cable and a second cable, wherein the first main cable saddle is used for inverted-U-shaped rotation of the first cable at the top of the cable rotation channel, and the second main cable saddle and the diverting cable saddles are used for M-shaped rotation of the second cable at the top of the cable rotation channel. By means of these configurations, stress at the central axis of the top of the anchorage structure can be dispersed to two sides of the top of the anchorage structure, thus avoiding stress concentration of the anchorage structure.

IPC Classes  ?

• E01D 19/14 - Towers; Anchors; Saddle supports
• E01D 19/16 - Suspension cables; Cable clamps for suspension cables
• E01D 21/00 - Methods or apparatus specially adapted for erecting or assembling bridges

Abstract

A top-down construction type assembly construction method for a paved road surface, the method comprising: step I, manufacturing a prefabricated slab: using a top-down construction method to manufacture the prefabricated slab, wherein vertically penetrating bolt sleeves are arranged in the prefabricated slab, and the bolt sleeves are evenly arranged in the prefabricated slab; and step II, mounting the prefabricated slab: on a clean lower bearing plate, placing the prefabricated slab in one step according to the mounting sequence of a mounting section, then finely adjusting the position and elevation of the prefabricated slab, performing grouting construction after the adjustment is completed, and finally forming a complete paved road surface. The prefabricated slab is manufactured by means of firstly laying bricks and then pouring concrete, and finally the prefabricated slab is rolled over and mounted, thus eliminating on-site concrete bonding between the bricks and the lower bearing plate, improving the overall stability of the bricks and the prefabricated slab after being mounted, and greatly reducing the separation of the bricks from a road during operation. Thus, assembled mounting for a paved road surface is implemented, the engineering cost is saved, and the construction period is shortened.

IPC Classes  ?

• E01C 5/06 - Pavings made of prefabricated single units made of units with cement or like binders
• E01C 5/00 - Pavings made of prefabricated single units
• E01C 9/00 - Special pavings; Pavings for special parts of roads or airfields
• 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

Abstract

A variable cross-section intelligent bridge making machine, which comprises a hanging beam, the hanging beam being arranged on the end face of an already placed section of a bridge; main beams, two main beams being detachably fixed to ends of C-shaped components, one end of each main beam extending to the placed section, and the other end extending out of an end face of the placed section; an outer mold, the outer mold being arranged at parts of the main beams extending out of the end face of the placed section, and an inner mold is correspondingly arranged in the outer mold; two guide rails, the two guide rails being correspondingly arranged at two sides of the bridge deck, and supporting bases slidably assembled in the guide rails are arranged at the two respective ends of the hanging beam; and counter-force mechanisms, the counter-force mechanisms being correspondingly arranged at the ends of the main beams extending out from the placed section. The variable cross-section intelligent bridge-building machine is arranged on the already placed section of the bridge, and said bridge-building machine is fully supported by means of the hanging beam and the main beams; upon being driven by external force, the hanging beam can slide along the guide rails, thereby implementing automatic movement.

IPC Classes  ?

• E01D 21/00 - Methods or apparatus specially adapted for erecting or assembling bridges
• E01D 21/10 - Cantilevered erection
• E01D 101/24 - Concrete

Abstract

Provided in the present invention is a construction method for an upper surface course made of a steel slag-asphalt mixture. The construction method comprises the following steps: preparation of construction materials, acceptance of a middle surface course, construction of a binding course, mixing of a steel-asphalt mixture, transportation of a steel slag-asphalt mixture, paving of the steel slag-asphalt mixture, rolling of the steel slag-asphalt mixture, arrangement and treatment of construction joints, and inspection and acceptance, wherein the rolling of the steel slag-asphalt mixture comprises preliminary rolling, re-rolling and final rolling, the rolling speeds of preliminary rolling and re-rolling are 4-5 km/h, and the rolling speed of final rolling is 2-3 km/h. The construction method of the present invention has the characteristics of a simple construction process and high construction efficiency; moreover, the binding power and shear strength of the steel slag-asphalt mixture used in the upper surface course and the aging resistance, wear resistance, etc. of an asphalt pavement are improved to a certain extent compared with those of a common gravel mixture, such that the service level of a road can be effectively improved.

IPC Classes  ?

• E01C 7/18 - Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders

Abstract

A construction method for a steel-concrete main girder of a cable-stayed bridge. The steel-concrete main girder is constructed in a multi-segmental manner. The construction method comprises the following steps: step 1, carrying out cast-in-place construction on a segment of concrete side main girder (1) on a main tower (100) and steel-concrete main girders on two sides of the main tower (100) by using a bracket (4); step 2, constructing the remaining midspan cantilever segments of steel-concrete main girders by using a front-pivot guyed form traveler (3); assembling a cantilever form traveler on the steel-concrete main girder, binding a steel bar, hoisting a steel cross beam (2), pouring concrete, applying a tensile prestress after the strength thereof reaches design requirements, and hoisting a bridge deck panel; step 3, moving the cantilever form traveler forward to the next segment, and repeating the construction process in step 2 to construct the next segment; step 4, constructing a side-span cast-in-place segment, using a floor support to construct the side-span cast-in-place segment, wherein the support uses a support scheme of a pile foundation and a Bailey beam; step 5, joining the side span; and step 6, joining the midspan. The construction method can ensure that the steel-concrete main girder has sufficient integrity and robustness, and can save construction time.

IPC Classes  ?

• E01D 21/00 - Methods or apparatus specially adapted for erecting or assembling bridges
• E01D 21/06 - Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
• E01D 21/10 - Cantilevered erection

Abstract

A test apparatus and method for measuring the frictional resistance of a thixotropic mud, the test apparatus comprising: a test platform (1). A prefabricated concrete block is filled in a sliding box (2) and is used for simulating an on-site reinforced concrete box culvert, and a thixotropic mud (13) is spread on the surface of the concrete (12). A loading apparatus is loaded above the concrete (12) along the longitudinal direction, and a soil sample (14) is filled in the loading apparatus, in order to simulate an overlying soil mass on the box culvert in a jacking construction process, and once loaded, the soil sample (14) is in contact with the thixotropic mud (13). A horizontal force gauge (7) is horizontally fixed onto a side portion of the loading apparatus, and a baffle (18) facing the horizontal force gauge (7) is arranged on the test platform (1). The sliding box (2) is driven to slide along the test platform (1) towards the baffle (18), and the baffle (18) blocks the horizontal force gauge (7), so as to produce sliding displacement between the loading apparatus and the sliding box (2), and the frictional resistance between the soil sample (14) and the concrete (12) is displayed by means of the horizontal force gauge (7), thereby simulating the interactions between a box culvert, mud, and overlying soil in the box culvert jacking process.

IPC Classes  ?

• G01N 19/02 - Measuring coefficient of friction between materials

Abstract

A dry desilting method for a riverway. In a working process, a river channel must be locally cut off, to allow both banks to have a certain amount of space and facilitate riverway desilting. Furthermore, riverway desilting is thorough, desilting depth is easy to control, sludge concentration is high, transportation costs are low, and engineering costs are relatively low. In the overall process, river channel desilting is carried out in segments, early-stage preparation and later-stage working is carried out at the same time, and the working process is efficient and rapid, thus both ensuring the smoothness of the river channel desilting project, and ensuring that impact on the surroundings is reduced to a minimum.

IPC Classes  ?

• E02F 5/28 - Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other waters
• E02D 19/04 - Restraining of open water by coffer-dams
• C02F 11/00 - Treatment of sludge; Devices therefor