Steel column sectional shelf-unit construction and steel column sectional shelf-unit
The present invention relates to a kind of construction and special-purpose falsework thereof of bridge construction, relate in particular to a kind of steel column sectional shelf-unit construction and steel column sectional shelf-unit thereof.
When building urban interchange or viaduct and cross over means of transportation such as existing road, bridge, often need take the part runway erection construction falsework of existing road.Traditional rack form mainly contains bowl fastening type support and Bei Lei boom support.The bowl fastening type support element is single, and impact resistance is relatively poor, and bracket assembly is originally higher, and because single rack bearing is limited in one's ability, thereby for the bigger bridge of weight, the number of holders that needs is bigger, it is bigger to cause taking ground space, influences the traffic capacity easily.Shellfish thunder boom support condition of construction is complicated, and lifting component is difficult, removes to be difficult for.Thus, more than two kinds of traditional rack forms all inevitably the traffic of present situation road is produced and disturbs and cause traffic congestion, and then produce a series of social concern.
Summary of the invention
The object of the present invention is to provide a kind of steel column sectional shelf-unit construction; This worker's method adopts the steel column sectional shelf-unit to replace traditional bowl fastening type support and Bei Lei boom support; Can reduce and take existing path resource; Effectively alleviate traffic above-ground pressure, solved the problem in the long-term puzzlement Urban Bridge construction preferably, have the advantages that cost is low, construction is quick, safe.The present invention also provides a kind of steel column sectional shelf-unit of special use.
To achieve these goals, steel column sectional shelf-unit construction of the present invention comprises the bracket basis treatment step, makes said bracket basis satisfy required requirement for bearing capacity; And set up steel column sectional shelf-unit step, and steel strut is connected with said bracket basis, install after whole steel struts, with connecting between each said steel strut, distribution beam is set on said steel strut top.
Said distribution beam can be a semi girder, is made up of i iron or Bei Leiliang.
Said steel strut is made up of more piece steel strut member, at first head is saved the steel strut member and is connected to said bracket basis, connects all the other joint steel strut members then successively.
Steel column sectional shelf-unit construction of the present invention also comprises the preparation of construction step.
Steel column sectional shelf-unit construction of the present invention comprises also sandbox or jack step is installed that said sandbox or jack are placed on said distribution beam.
Steel column sectional shelf-unit construction of the present invention can not be provided with distribution beam on the top of said steel strut yet, said sandbox or jack directly is placed on the top of said steel strut.
The present invention also provides a kind of steel column sectional shelf-unit, comprises steel column support and distribution beam, and said steel column support is made up of a plurality of steel struts that are vertically fixed on the bracket basis, and the top of said steel strut is provided with distribution beam.
Said distribution beam is a semi girder, is made up of i iron or Bei Leiliang.
Because the distribution beam of the steel column sectional shelf-unit that construction of the present invention is used is a semi girder; Providing under the situation of equal supporting surface; The floor space of the used support of the present invention is lacked than conventional stent; Thereby reduce and to take existing path resource, can reduce the influence of work progress to the existing road traffic.
Description of drawings
Fig. 1 is the used steel column sectional shelf-unit front view of steel column sectional shelf-unit construction of the present invention;
Fig. 2 is the used steel column sectional shelf-unit of a steel column sectional shelf-unit construction of the present invention vertical view;
Fig. 3 is the front view of steel column sectional shelf-unit construction cheek of the present invention when directly being placed on the steel strut top.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described further.
The used steel column sectional shelf-unit of construction of the present invention mainly is made up of steel strut 2; The bottom of every steel strut 2 is connected with bracket basis 1 and is vertically fixed on the bracket basis 1, connects to guarantee the resistance to overturning of steel column supporting structure through bearing diagonal 6 between the steel strut 2.Steel strut 2 tops can be provided with distribution beam 3.Sandbox 5 or jack directly or indirectly are placed on the distribution beam 3; The bridge superstructure deadweight and the working load that comprise girder steel case 7 (see figure 2)s are delivered on the distribution beam 3 through sandbox 5 or jack, through distribution beam 3 load are distributed to each steel strut 2 then.
When using steel column sectional shelf-unit construction provided by the invention and constructing, in the both sides of being crossed over road and/or in the middle of road, set up the steel column sectional shelf-unit as required respectively, concrete construction process mainly comprises: preparation of construction; Bracket basis is handled; Assembling steel column support; Distribution beam is set; Sandbox or jack are installed.
At first, according to working drawing design, site contour, build establishment such as scheme and appointed condition constructure scheme, and according to intensity, rigidity and the stability of the different construction stage supports of construction stage load checking computations.According to working drawing, according to the strong point measurement and positioning is carried out in the installation site of steel strut 2, guarantee the accurate of steel strut 2 positions.
Preparation of construction work is handled bracket basis 1 after accomplishing.Bracket basis 1 need be placed on the ground that satisfies requirement for bearing capacity.In order to prevent that moderate finite deformation appears in the basis in bridge construction process, can the substrate foreign material be removed totally, also can avoid substrate to receive the water logging bubble and endure cold.
Treat that bracket basis 1 processing reaches after the requirement of setting, promptly can begin to assemble the steel column support.At first, the used steel strut member of inspection does not have gross distortion and cross section to weaken to guarantee them.Then, with total powerstation accurate setting-out is carried out at the mounting plane control point of steel strut 2.Each steel strut 2 can be formed by connecting a plurality of steel strut members.During assembling; Adopt the form of merogenesis lifting steel strut member; At first head is saved the steel strut member and is connected with bracket basis 1 such as pre-embedded bolt through basic built-in fitting, respectively save between the steel strut member with the connection of flange high-strength bolt at all the other then, while steel column top also can adopt flange high-strength bolt connected mode to be connected with top rail; Make that like this easy installation and removal of steel strut 2 is quick, greatly improved operating efficiency.For increasing steel strut 2 bottom rigidity and quality of connection, can add with basic built-in fitting junction all around in steel strut 2 bottoms and weld the triangular steel plate of putting more energy into, for example be four.It is vertical to remain steel strut 2 during installation.For guaranteeing the stability of construction period support, bearing diagonal 6 is set between steel strut 2 in order to guarantee the resistance to overturning of supporting structure.The steel strut member can adopt 609 millimeters of external diameters, the pipe steel column that wall thickness is 16 millimeters.
The assembling of steel column support is provided with distribution beam 3 after accomplishing on steel strut 2.At first can i iron be set or Bei Leiliang makes distribution beam 3, and distribution beam 3 is welded on steel strut 2 tops on every steel strut 2 tops.Distribution beam 3 can be arranged to semi girder.Sandbox 5 or jack are placed on the distribution beam 3, and be as illustrated in fig. 1 and 2.Distribution beam 3 also can be arranged to simply supported beam, and can weld spandrel girder again this moment on distribution beam 3, and sandbox 5 or jack are placed on the spandrel girder.Alternatively, also distribution beam 3 can be set, but load-bearing is come on the top that sandbox 5 or jack directly are placed on steel strut 2, as shown in Figure 3.For example can also use that i iron couples together a plurality of distribution beam 3, come load-bearing thereby form working platform.
Simple, the easy accessibility of the structure of the combination steel column support that construction of the present invention is used and making, material can be selected pipe steel column and i iron for use, and these all are to be easy to lease the material that obtains, and have greatly reduced use cost.
In addition, because distribution beam 3 adopts the semi girder form, and loading is delivered to steel strut 2, thereby the quantity and the floor space of the steel strut 2 that needs are less by distribution fine strain of millet 3, also less to the influence of road.