33 results about "Masonry arch" patented technology

The invention discloses a reinforcing method of a masonry arch bridge, which comprises the following steps of: a, planting ribs on an arch ring of the arch bridge along the cambered surface direction of the arch bridge; b, planting ribs at the position close to the two sides, on the circular arc surface of the arch ring along the cambered surface direction of the arch bridge; and c, forming symmetrically distributed reinforced concrete ribs along the distribution direction of the planted ribs in the step a and the step b in a way of casting molding, wherein the cross section of the reinforcedconcrete ribs is L-shaped. The reinforced concrete ribs which are of integral structures are formed along the two sides of the arch ring in the way of planting the ribs and casting concrete, then load can be directly transferred to an arch base through the symmetrically distributed reinforced concrete ribs of which the cross section is L-shaped, and the stress to the reinforced concrete ribs is equal to that to a ribbed arch bridge. When the method is compared with the method of singly increasing the area of the arch ring, the dependence on the primary arch ring is smaller, even the primary arch ring can be supported, the damage to the primary arch ring is small, the requirement of increasing the loading capacity of the masonry arch bridge is met, and the damage to the primary old arch ring is avoided to the maximal degree.

The invention discloses a masonry arch bridge using lightweight concrete as arch filler. The masonry arch bridge comprises a main arch ring (1), a spandrel arch (3) and an arch filler layer (2) and is characterized in that the arch filler layer (2) is a lightweight concrete filler layer, and the apparent density of the lightweight concrete filler layer is 800kg/m<3>-1950kg/m<3>; a leveling layer (4) is arranged on the top surface of the arch filler layer (2); a waterproof layer (7) is arranged between the main arch ring (1) and the arch filler layer (2); and saw joints (5) are arranged along the transverse direction of the bridge; and water permeating pipes (6) are arranged in the lowest position of each filler formed by the pairwise saw joints (5) and at two sides of a side wall. The waterproof layer (7) is formed by laying a permanent condensate or asphalt. The masonry arch bridge has the advantages that the stress of the arch can be effectively improved, the internal force of a dead load is reduced, and the carrying capacity of a bearing live load of the masonry arch bridge is increased.

The invention discloses a technique for safe improvement as well as ecological repair and reconstruction of a mine soil discharge yard. The technique is implemented according to the following processes and steps: carrying out comprehensive optimization according to experience, calculation and land use properties to determine slope, slope length and flat pan width of the soil discharge yard, and designing slope cutting grade of an accumulation side slope of the soil discharge yard into three grades, wherein the height of each grade of slope is 9-11 m, the flat pan width of the side slope is 4-8 m, and the slope ratio is as follows: the first grade is 1:(2.0-2.1), the second grade is 1:(1.7-1.8) and the third grade is 1:(1.45-1.60); preparing the flat pan into a horizontal, slope or reverse slope type; and constructing the first-grade and second-grade side slopes by adopting grass planting in stone masonry arch rack, slope bottom apron protection, and designing mortar flag stone side slope flat pan and water discharge channel of the flat pan as well as slope edging, constructing the third-grade side slope by a vetiver grass slope protection greening technique, firstly sowing Bahia grass in the flat pan of the soil discharge yard with the seed amount of 15-25 g/m<2>, after sowing, maintaining and managing in time, checking seedlings and supplementing deficient seedlings, harvesting 1-2 times every year and maintaining seedling height of 20-30 cm when most stem tillers enter fringe-bearing flourishing growth stage, and planting fruit trees or crops in the flat pan after 1-2 years. In the technique disclosed by the invention, engineering measure and biological measure are comprehensively adopted to ensure the safety of the mine soil discharge yard and achieve good ecological repair effect and landscape effect; and plants adaptable to local conditions are planted and the cost is lower.

The invention discloses a method for adjusting the weight of fillers on a masonry arch bridge in a partitioning manner. The masonry arch bridge comprises a main arch ring (1), spandrel arch rings (2), a filler layer (3) on arches, and a bridge panel (4). The method comprises the steps: the filler layer (3) on the arches is divided into an arch top area (31) and spandrel arch areas (32), wherein the arch top area (31) is formed between the main arch ring (1) and the bridge panel (4), and the spandrel arch areas (32) are formed between the spandrel arch rings (2) and the bridge panel (4); lightweight concrete fillers with the apparent density from 800kg/m3 to 1200 kg/m3 are filled into the arch top area (31), and lightweight concrete fillers or ordinary soil quality fillers with the apparent density from 1200kg/m3 to 1950 kg/m3 are filled into the spandrel arch areas (32); and the weight of the filler layer (3) on the arches is adjusted by calculating three objective functions, i.e. bending moments Md, M1/4 and Mj generated by the main arch ring on the arch top, the one quarter of an arch span, and arch feet, and the like. The method has the advantages that the utilization efficiency of arch ring materials can be improved, the distribution of the internal force of the main arch ring is improved, and the carrying capacity of the arch bridge is improved.

An adjustable masonry arch form is disclosed. The adjustable masonry arch form has a planar base section to support the masonry elements which will form the masonry arch, and a plurality of attachment elements secured to the planar base for securing the form to a structure. The adjustable masonry arch form is constructed from material rigid enough to support the masonry elements, but flexible enough to be bent to conform to any given arched construction without unwanted buckling of the form. The masonry elements which form the masonry arch are placed directly on the planar base of the form in the desired configuration and secured in the masonry arch by mortar. The form is left in position permanently, obviating the need to build a temporary arch support saving time and expense and obviating waste of materials.

The invention relates to the technical field of arch bridges, in particular to a reinforced portable integral prefabricated masonry arch bridge, which comprises a bridge body and a bridge deck, wherein the inner side of the bridge body is provided with an arch ring; the arch ring comprises a main body consisting of a plurality of prefabricated arch blocks arranged in turn, and a fiber reinforced composite material connecting layer fixedly attached to the upper surface of the main body; side faces of every two adjacent prefabricated arch blocks are attached to each other; lower surfaces of all prefabricated arch blocks form a lower surface of the arch ring; the fiber reinforced composite material connecting layer is fixedly connected with the upper surface of each prefabricated arch block; a transverse pull rod is arranged between arch feet of the bridge body; and two ends of the transverse pull rod are fixedly connected with the bridge body through bolts. Compared with the prior art, the transverse pull rod is arranged between the arch feet of the bridge body and is used for providing self lateral restriction for an arch body, so that the bearing capacity and stability of the arch bridge structure are improved and the arch bridge can be applied to soft foundations.

A novel RC-masonry combined arch bridge structure is composed of a first-stage structure, a second-stage structure and a building on an arch, wherein a whole space structure composed of RC arch ribs,RC cross beams and pier abutments serves as the first-stage structure; the RC arch ribs and the cross beams of the first-stage structure are prefabricated section by section in the early stage of construction, hoisted section by section, combined and cast in place into a whole. When the whole first-stage structure reaches design strength, masonry arch plates are built on the first-stage structurestrip by strip and section by section to serve as the second-stage structure, wherein the middle arch rib masonry arch plate is built first, and then the edge arch rib masonry arch plates are built. According to the thickness of a main arch ring, a later-stage structure or the building on the arch built on the second-stage structure layer by layer is determined till the whole bridge is formed, andconstruction is finished. According to the construction method, the RC arch ribs play a role in bearing components, and an arch frame formed by the arch ribs is a formwork support for later-stage structure construction, so that the waste caused when the arch frame in a traditional masonry arch bridge support construction method only serves as a construction support and is detached after the archring is built is avoided.

The invention discloses an ultra-high-performance concrete lattice reinforcement structure and a method thereof for reinforcing a masonry arch bridge. The reinforcement structure comprises primary main arch rings, shear-resistant connectors and ultra-high-performance concrete longitudinal and transverse reinforcement strips. The original main arch rings are provided with the shear-resistant connectors, so that the ultra-high-performance concrete longitudinal and transverse reinforcement strips are integrated with the original main arch rings. The defects of low material strength, low bonding strength, poor durability and the like of ordinary concrete are compensated, so that reinforcement layers and the original main arch rings form an integrated part to jointly bear stress, and the application status of deviation between a reinforcement design calculation theory and the actual stress state is improved. The consumption amount of reinforcing materials is small, loads of the original main arch rings are reduced, and meanwhile ultra-high-performance concrete reinforcement layers share more live load effects. The long-term use performance and durability of a bridge are improved, the situations of cracking, damage, water seepage and other damage of concrete at the junctions of the reinforcement layers and the original main arch rings are avoided, and the lifetime cost of reinforcement of the masonry arch bridge is reduced.

The invention discloses a novel reinforcing method of a fabricated masonry arch body. The novel reinforcing method comprises the following steps: a, concrete arch blocks are prefabricated; b, the concrete arch blocks are linearly arrayed and flatly laid to be orderly so as to form an arch block linear array; c, an FRP cloth is flatly laid on the upper surface of the arch block linear array to obtain the flexible arch body; d, a mortar protective layer is poured; e, left and right side permanent supports are poured; f, left and right side temporary supports are fixedly placed; g, left and rightside jacks are mounted; h, hoisting is prepared; i, the flexible arch body is hoisted, and arch rings are formed; j, lifting eye bolts are dismantled; k, the arch rings are pushed in place; l, the left and right side jacks are reset; m, the step h to the step l are repeated to complete subsequent arch ring mounting operation till all the needed arch rings are mounted below a bridge floor of an original bridge; and n, the left and right side temporary supports are dismantled. According to the reinforcing method, an original bridge structure can be effectively machined, the construction processis convenient and quick, and durability is good.

A method of enlarging the space beneath a masonry arch bridge 301, the masonry arch bridge 301 comprising a masonry arch 303 and a spandrel wall at each end of the masonry arch 303, the method comprising forming a moveable portion 332 of the masonry arch bridge 301 by cutting the spandrel walls to form a cut 330 on each side of the masonry arch 303, applying a lifting force to the masonry arch 303 to raise the masonry arch 303 to a raised position, and securing the masonry arch 303 in the raised position.

The invention provides a filling type concrete shell plate arch bridge. The filling type concrete shell plate arch bridge is an innovative bridge type structure of a masonry arch bridge and has the advantages that material obtaining is easy and convenient, the force is reasonable, the manufacturing cost is low, and the application range is wide. Based on original computational examples, brief introduction PPT slides and a WORD manuscript of the filling type concrete shell plate arch bridge are further summarized and supplemented from the aspects of structural sketches, force principle analysis, section calculation methods, side wall stability checking, material strength design indexes and the like. 'Five different' and 'five first' of the bridge type are outstandingly reflected, specifically, 'five different' comprises that the structures are different, materials are different, the force is different, calculation methods are different, and construction is different; and 'five first' comprises that the stabilized soil materials are used for the bridge structure for the first time; the stabilized soil materials are proposed to be used for bridge structure strength calculation indexes through tests for the first time; the masonry composite system arch bridge is designed for the first time, and a series of internal force and section strength checking is conducted; the calculation method for an arch building to participate in calculation of the force of a main arch ring is put forward for the first time; and related formulas of a 'stabilized soil-reinforced concrete' composite structure to conduct section strength calculation according to a reinforced concrete structure section calculation mode are deduced for the first time.

The invention discloses a construction method for quickly breaking and dismantling a masonry arch bridge based on bridge deck cutting, which comprises the following steps of: 1, collecting or actually measuring structural parameters of the masonry arch bridge to be broken and dismantled, and acquiring span, rise, bridge deck pavement thickness, width and steel bar arrangement condition; step 2, cutting the to-be-broken masonry arch bridge deck, wherein the cutting position at least comprises bridge deck pavement right above an arch foot on one side; thirdly, a long-arm hook machine is adopted for breaking and dismantling an arch foot on the other side of the masonry arch bridge, and the whole span of the masonry arch bridge collapses and falls off; and fourthly, the collapsed and fallen masonry materials are cleared and transported, and masonry arch bridge forcible entry operation is completed. According to the method, the whole-span collapse can be realized, the masonry material is crushed into small blocks by utilizing the falling energy of the whole-span collapse, the quick breaking and removing and clearing are realized, the breaking and removing safety risk is reduced, the construction period is shortened to the greatest extent, the construction cost is reduced, and the interference and influence on the surrounding environment are reduced.

The invention discloses a masonry arch bridge technical condition parametric structure modeling and intelligent evaluation system, which comprises a masonry arch bridge evaluation model unit, a structure model unit, a disease input unit, a Web client, a field acquisition unit, a MongoDB database and an object storage unit, and is characterized in that the evaluation model unit sets composition ofa structure model and an intelligent evaluation algorithm; the structural model unit determines modeling parameters and component number rules of a masonry arch bridge, and the Web client accesses andedits a MongoDB database and an object storage unit, automatically and manually associates diseases, checks scores and generates a report. On the basis of the evaluation model unit, the structure model unit and the disease input unit, parameterized structure modeling and intelligent evaluation are achieved, and the problems that the masonry arch bridge technical condition evaluation recording process is tedious, not visual, low in efficiency, not standard, prone to making mistakes in the evaluation process and the like are solved.