258results about How to "Reasonable structural stress" patented technology

The invention discloses a high ground stress weak surrounding rock tunnel excavation and support construction method. Excavation and support construction are conducted on a weak surrounding rock tunnel to be constructed in multiple sections from rear to front in the longitudinal extension direction of the tunnel. The method comprises the steps that 1, rock body strength and the maximum ground stress inside surrounding rock are tested; 2, the extrusion-type large-deformation level of the surrounding rock is determined; 3, a primary support scheme is determined, wherein the primary support scheme is determined according to the determined extrusion-type large-deformation level, and the primary support scheme is a profile steel frame support scheme or a grid steel frame and cover arch combined support scheme; 4, tunnel excavation and support construction are conducted; 5, excavation and support construction of the next section are conducted; 6, the fifth step is repeated for many times till the whole excavation and support construction process of the weak surrounding rock tunnel to be constructed is completed. According to the high ground stress weak surrounding rock tunnel excavation and support construction method, the steps are simple, the design is reasonable, construction is convenient, the use effect is good, the tunnel excavation and support construction process of the high ground stress weak rock tunnel can be completed easily, conveniently and rapidly, and the construction process is safe and reliable.

The invention provides a walking type incremental launching device. The device comprises a slide box, a slideway, a translation jack, a jacking jack and a deviation-rectifying jack assembly, wherein the slide box comprises slide box body units and slide box body connectors connecting the slide box body units; the slide box body units are movably connected by bolts; the slide box body units and the slide box body connectors are movably connected by bolts; the slide box body connectors are movably connected by bolts; the slideway comprises slideway body units and slideway body connectors; the slideway body units are movably connected by bolts; the slideway body units and the slideway body connectors are movably connected by bolts; the slideway body connectors are movably connected by bolts; the whole slide box is put on the slideway and is of an up-down structure; the jacking jack is installed in a jacking jack installation barrel on the slideway; the translation jack is installed on a translation jack installation plate on the slideway; and the deviation-rectifying jack assembly is installed on a deviation-rectifying jack installation rack on the slideway. Used in a method for bridge incremental launching construction, the device has the characteristics of strong generality, convenience in construction and low cost.

The invention discloses a water-rich weak surrounding rock long-and-big tunnel construction method. The method includes that a tunnel inclined shaft is arranged on one side of a main tunnel of a tunnel to be constructed, the main tunnel is divided into a tunnel entry section, a tunnel exit section and a middle connecting section connected between the tunnel entry section and the tunnel exit section, the middle connecting section is divided into an inclined shaft assisting construction entry section and an inclined shaft assisting construction exit section, and each of the tunnel entry section, the tunnel exit section, the inclined shaft assisting construction entry section and the inclined shaft assisting construction exit section is divided into multiple sections for construction. A construction method of each section includes: step 1, performing geological forecasting in advance, and when a debris flow formation exists ahead, entering a step 2, or else, entering a step 3; step 2, performing stability control construction; step 3, determining a primary supporting scheme; step 4, excavating the tunnel, and performing primary supporting construction; step 5, performing secondary lining construction on the tunnel. The water-rich weak surrounding rock long-big tunnel construction method is simple in step, reasonable in design, simple and convenient to construct, good in using effect, capable of meeting construction requirements of water-rich weak surrounding rock long-and-big tunnels, short in construction period and safe in construction process.

Provided is a thickened frame type ballastless track plate. The track plate comprises a base plate, bosses and track bearing tables. The base plate is of a cuboid, the two bosses are symmetrically arranged on one face of the base plate along the axis of the cuboid in the length direction, and the track bearing tables are evenly distributed in the length direction of the upper surfaces of the bosses. A through hole is formed in the base plate and is located between the two bosses symmetrically arranged on the base plate, and a frame structure connected between the two bosses through a transverse reinforcement concrete structure is formed. The thickened frame type ballastless track plate can effectively reduce track plate warping caused by temperature stress, eliminate a pull cracking phenomenon, and enhance running safety and comfort. The thickened frame type ballastless track plate is reasonable in structural stress, light, high in structural strength and capable of effectively improving the stress condition of a sleeper structural system, prolonging the service life of the structure and optimizing rack circuit parameters, improves the circuit transmission characteristic of a resonant track, can be directly and effectively connected with a current high-speed railway CRTS-I ballastless track plate, and is suitable for industrial production.

The invention belongs to the technical field of design and construction of tunnel and underground engineering and especially relates to a rock stratum underground excavation three-story subway station umbrella cover structure and a construction method thereof. The structure comprises a main arc structure and a reinforced concrete inverted arch. an underground two-story side wall and an underground three-story side wall are installed between the main arc structure and the reinforced concrete inverted arch. The main arc structure comprises an arch portion second lining middle segment and arch portion second lining side segments; the arch portion second lining side segments are positioned at two sides of the arch portion second lining middle segment; the reinforced concrete inverted arch comprises an inverted arch second lining middle segment and inverted arch second lining side segments; the top of the inverted arch second lining middle segment is provided with two bottom girders; the bottom of the arch portion second lining middle segment is provided with two top girders; steel-pipe columns are installed between the top girders and the bottom girders. The structure and the method of the invention is suitable for supporting structure and construction of weak rock stratum dug three-story subway station and large sections of underground space; the structure has good stability and increased construction efficiency.

The invention relates to an annular cross cable truss structure, belonging to the field of a spatial cable truss structure. The structure comprises an annular stressed truss part, and a cable truss system part, wherein the cable truss system part consists of an upper string stabilizing cable, a support rod and a lower string bearing cable; a fish-bellied cable truss, stressed on a plane, is formed by connecting an upper string cable, a lower string cable and the support rod; and the annular cross cable truss structure, which has good spatial stress performance, is formed by arranging a plurality of plane fish-bellied cable trusses in an annular and cross way; the upper string cable and the lower string cable are and fixed at an ear plate of the annular stressed truss through anchorages at cable ends; and the stressed truss provides constraint to balance the horizontal force in the cables. The annular cross cable truss structure provided by the invention has the advantages of novel structure form, rational structure stress, less structure parts, strong collapse resistance, and attractive architectural style and can automatically maintain stable outside a surface, and moreover, the annular cross cable truss structure is convenient to manufacture and install, thus, the structure has stronger practical values.

The invention provides a joint bearing low-temperature wear test system. The system comprises a base, a temperature box, a radial stress subsystem, a power subsystem, a temperature control subsystem, a wear measurement subsystem and a clamp subsystem. The clamp subsystem comprises a pushing block, a loading plate, an accompanying test bearing seat, a mandrel, an accompanying test bearing, an end cover and a locking part, which are independent detachable parts; the mandrel, the pushing block or the loading plate can be replaced to realize clamping in a life test of joint bearings with different diameters, so that the utilization rate and the universality of a test clamp are improved; and in addition, the clamp subsystem adopts the structural design improvement that a single-side flange is added to an inner hole of the loading plate, the thickness of the pushing block is reduced, the flange and the end cover cooperatively fix the accompanying test bearing, and the like, so that the mandrel deformation or breakage easily caused in the joint bearing wear test process is effectively avoided.

The invention discloses a fabricated steel-profiled steel sheet concrete combined board small box girder, and belongs to the field of civil engineering. The invention solves the problem of long construction time of the field pouring of the existing steel-concrete combined box girder. The small box girder comprises a steel box and profiled steel sheet concrete combined bridge panels; two rectangular box structures formed by corrugated steel web plates are welded on the surface of the steel bottom plate; upper steel braces are arranged on the upper edge end faces of the corrugated steel web plates, and the profiled steel sheet concrete combined bridge panels are arranged on two upper steel braces; the profiled steel sheet concrete combined bridge panel is formed by pouring and prefabricating concrete on the profiled steel plate with a reinforcing mesh; multiple reserve holes are arranged on the concrete board, and stud groups are welded in the reserve holes; concrete is poured in the reserve holes. Through the prefabrication and overall assembly of components, the small box girder can meet the demand of bridge construction of a modernized city, thus the construction influence on surrounding environment is reduced, the fast construction with few people is realized.

The invention relates to a reticulated shell-annular truss frame-irregular-shaped combination column combined support spherical tank system capable of slightly moving. The system comprises combined spherical tanks, reticulated shell-annular truss frame-irregular-shaped combination column combined supports, a rubber ball-damper shock-absorbing energy consumption device, wherein annular truss frames are encircled outside the reticulated shells, and are connected with the irregularly-shaped combination columns; the combined spherical tanks are arranged on the reticulated shell-annular truss frame-irregularly-shaped combination column combined supports; the rubber ball-damper shock-absorbing energy consumption device is arranged between the reticulated shell pitch points and the combined spherical tanks; the rubber ball- damper shock-absorbing energy consumption device is composed of dampers and rubber balls; the rubber balls are arranged at one ends of the dampers; concave slide tracks are arranged on the outer walls of the combined spherical tanks; the rubber balls are positioned in the concave slide tracks; the other ends of the dampers are fixed with the pitch points of the reticulated shells; the irregularly-shaped combination columns are composed of solid-web section steel and reinforced concrete; the solid-web section steel is placed in the reinforced concrete; an L-shaped support seat is arranged at the top ends of the combination columns. The system can move slightly in any direction under the strong shock or the strong wind, and has excellent energy consumption shock-absorbing performance and wing resistance.

The invention discloses a mounting equipment car. The mounting equipment car consists of power equipment, a chassis, a car body, electric equipment and the like, and is characterized in that a first extension column 6, a second extension column 12, a third extension column 24 and a fourth extension column 43 are correspondingly mounted at the upper sections of inner cavities of stand columns at four corners of a box; the other end of each stand column is connected to the top of the box; the top of the box can be vertically lifted to lift equipment; an extension lifting crane is mounted at thetop in the box; more than one layers of cross beam support structures and drive connecting devices are mounted on the inner and outer sides of a channel between longitudinal components on the two sides of the box to form a rotary recovered movable plane support structure; the equipment can be carried on cross beams; the cross beams can be automatically recovered on the two sides of the box; and the section of the box is n-shaped. The mounting equipment car reduces the equipment mounting construction flow, removes various cranes, vehicles, forklifts and tools in traditional construction, once finishes lifting, transportation and installation on one car, achieves automatic control and precise installation, realizes mechanical equipment installation, and greatly improves the equipment mounting efficiency.

The invention relates to a rotary lifting construction method for a cylindrical reticulated shell, and relates to a building construction method. The rotary lifting construction method comprises the following steps of: (1) splicing the cylindrical reticulated shell (1) on the ground; (2) supporting one end of the spliced cylindrical reticulated shell (1) by using a rotating hinge (3), and supporting a spliced extension operating surface (1-1) at the other end of the spliced cylindrical reticulated shell (1) by using a temporary support (4); (3) lifting the cylindrical reticulated shell (1) by using a lifter, so that the cylindrical reticulated shell (1) rotates around the rotating hinge (3), and continuing to splice the cylindrical reticulated shell (1) on the spliced extension operating surface (1-1); and (4) performing the lifting process and the splicing process alternately, so that the cylindrical reticulated shell (1) extends along the direction of an arc line until the cylindrical reticulated shell (1) reaches a designed position. By the rotary lifting construction method, the key problem of the forming of a cylindrical surface in the installation construction process of a cylindrical reticulated shell structure is solved, and an installation construction method without a support is provided.

The invention discloses a wooden structure house and a building process thereof. The wooden structure house comprises a house main body structure and a roof structure, wherein every floor of the house main body structure comprises a plurality of wall bodies 1; the adjacent floors are separated by a floor plate; the wall bodies 1 and the floor plate are an integrated composite board or are formed by splicing a plurality of composite boards arranged on the same plane; the integrated composite board is formed by piling a plurality of layers of wooden boards with same shapes and sizes; and the wooden board is formed by splicing a plurality of wooden plate strips which are arranged on the same plane. The building process comprises the following steps of: 1, on-site constructing foundation and basement, factory-prefabricating and transporting the integrated composite boards; and 2, using the prefabricated composite boards to assemble the wooden structure house on the spot. The wooden structure house in the invention is simple in construction process, controllable in construction quality, low in input investment, rational in structural stress of the built house, beautiful in shape, wide in application range and convenient for prefabricating the integrated boards and suspending on the spot.

The invention discloses a space truss multi-barrel base of an offshore wind power unit, which mainly comprises a connecting cylinder, three suction barrels arranged in a triangle shape or four suction barrels arranged in a quadrangle shape, and support pillars the number of which is the same as that of the suction barrels, wherein each suction barrel is fixedly connected with the connecting cylinder through the corresponding support pillar; and a support member with a truss structure is connected between every two support pillars. The invention is of an integrated structure which consists of a space truss system and a multi-suction-barrel base, transfers the overturning load suffered by the whole base into vertical underdraught and up-pull load on single-barrel base, fully utilizes the superiority of multi-barrel base for bearing vertical load, has the advantages that the bearing load of the structure is reasonable, and solves the difficulties that the construction cost of the offshore wind power unit is high and the construction is complicated.

The invention relates to a prefabricated cover beam steel bar jig frame and a manufacturing method of a prefabricated cover beam reinforcement cage and belongs to the technical field of bridge structure construction. According to the main technical scheme, the prefabricated cover beam steel bar jig frame comprises an underframe, a plurality of positioning frames and a grouting sleeve positioning disc; the multiple positioning frames are distributed on and connected to the underframe; main reinforcement positioning structures are arranged on the positioning frames and used for positioning main reinforcements in the prefabricated cover beam reinforcement cage; and the grouting sleeve positioning disc is arranged on the underframe and used for positioning an end grouting sleeve of the prefabricated cover beam reinforcement cage. The manufacturing method of the prefabricated cover beam reinforcement cage comprises the step that the prefabricated cover beam reinforcement cage is manufactured through the prefabricated cover beam steel bar jig frame. The prefabricated cover beam steel bar jig frame and the manufacturing method of the prefabricated cover beam reinforcement cage are mainly used for precisely positioning steel bars and the embedded end grouting sleeve of the prefabricated cover beam reinforcement cage, and the splicing precision and manufacturing quality of the prefabricated cover beam reinforcement bars are effectively improved.

The invention relates to a large cantilever wave-purlin combined PC bridge and a manufacture method thereof. The bridge comprises a concrete top plate and a concrete bottom plate, wherein two wavelike steel webs are arranged between the concrete top plate and the concrete bottom plate, the bottom ends of the two wavelike steel webs are respectively connected to two sides of the concrete bottom plate, the upper ends of the two wavelike steel webs are connected with the concrete top plate, an included angle between each wavelike steel web and the concrete bottom plate is not less than 90 degrees, vertical steel purlin pipes placed between the concrete top plate and the concrete bottom plate are arranged between the two wavelike steel webs, and steel purlin web inclined struts are arranged between the concrete top plate and the concrete bottom plate. The steel purlin web inclined struts are formed into a top plate large cantilever, the pulling stress is reduced, and the resistance to pressure is increased, so that the defects of no resistance to pressure and small torsional rigidity in the wavelike steel webs are remedied; the transverse flexural rigidity of the wavelike steel webs is good, and the longitudinal shearing rigidity is large, so that the defects of small transverse flexural rigidity and small longitudinal shearing rigidity of the steel purlin web inclined struts are remedied; and the large cantilever wave-purlin combined PC bridge has the advantages of light self weight, template bracket saving, convenience for construction, shortened construction period and low cost..

The invention relates to a slab-column structure hollow slap with mixed use of a filling rod and a filling box, and belongs to the field of general building constructions. The hollow slap comprises a column (1), a beam (2), a column side solid area (3), a beam side hollow area (4) and a central hollow area (5), and is characterized in that: a filling rod combined block (6) is arranged in the beamside hollow area (4); the orientation of the filling rod combined block (6) in the beam side hollow area (4) is accordant with the direction of the beam (2) which is adjacent to the filling rod combined block (6); the filling box (7) is arranged in the central hollow area (5); and the filling rod combined block (6) and the filling box (7) are positioned between an upper layer steel bar (8) and a lower layer steel bar (9) and are permanently embedded in concrete (10). A hollow floor provided by the invention is reasonably stressed along with a high hollow ratio, and the structure of the hollowfloor also has high reliability, earthquake resistance and cracking resistance, so the hollow floor has high economical efficiency and practicability.

The invention discloses a supporting steel frame of a high altitude large-span cantilever structure mold frame. The supporting steel frame comprises a floor slab, a supporting frame and a cantilever beam, wherein the supporting frame is of triangular shape; the lower end of the triangular supporting frame is mounted on an embedded iron piece on a lower floor slab; the upper end of the triangular supporting frame is provided with the cantilever beam; and one end of the cantilever beam penetrates in an anchoring ring mounted on an upper floor slab and is wedged through a wooden wedge. The supporting steel frame of the high altitude large-span cantilever structure mold frame, disclosed by the invention, has the advantages of reasonable stress, high rigidity, strong bearing force at the cantilever end, large cantilever span, strong bearing force, large rigidity of the frame body and capability of effectively ensuring the integral stability and construction safety of the large-span cantilever structure mold frame. The steel frame can be integrally spliced on the site in advance and has the advantages of lightweight frame body, convenience for mounting and detaching and labor and time conservation. The supporting steel frame can be recycled for multiple times, obtains better economic benefits and is worthy of being generalized.

The invention discloses a truss type retaining wall. The upper end of a lower part pile foundation is connected with an upper part truss structure through a bearing platform beam; the upper part truss structure comprises upper chord stand columns, lower chord stand columns, horizontal web girders, inclined web girders, transverse connecting beams and retaining plates; wherein the lower chord stand columns are connected through the transverse connecting beams to form a grid structure; each upper chord stand column is connected with the corresponding lower chord stand column through a plurality of horizontal web girders and a plurality of inclined web girders; every two adjacent upper chord stand columns are connected through the retaining plates to form an integrated retaining wall. The invention relates to a vertically placed cantilever truss structure system, which mainly utilizes the rationality and the stability of stress of truss triangular structure arrangement to improve the bearing capability and the lateral migration resisting ability of a retaining structure. Meanwhile, the overturning moment of a vertical truss retaining structure is balanced by utilizing the weight G of anti-pressure soil on the upper part of the bearing platform. According to the truss type retaining wall provided by the invention, the material intensity can be fully utilized, and the material utilization ratio is improved, and the construction cost of the foundation is reduced.

The invention mainly discloses a curtain wall. The curtain wall comprises hollow glass, upright columns and crossbeams, wherein the upright columns are connected with the crossbeams through first connecting joints to form a main structure body, and the hollow glass is connected with the crossbeams through second connecting joints. The hollow glass is assembled on the second connecting joints to form a hidden frame type curtain wall system. The novel curtain wall with the structure innovates the structure of the conventional curtain wall, initiates a new structure of a hidden frame type curtain wall in a curtain wall system, is reasonable in structure stress, is clean and elegant in appearance, and is safe and flexible to assemble.