Support-free bailey truss system for silo construction

Abstract

The utility model relates to a support-free bailey truss system for silo construction, which comprises a plurality of standard truss units and a central upright post, the plurality of standard truss units are arranged in a circular array by taking the central upright post as a center, the inner side end part of each standard truss unit is fixedly connected with the top of the central upright post, and the central upright post is fixedly connected with the central upright post. The outer side end part of each standard truss unit is lapped on the wall of the silo, and the side end part is fixedly connected with the bottom of the central upright post through a tension piece, so that a self-balancing stable structure with bearing capacity is formed. The utility model has the advantages that: 1) the length of the central upright post can be greatly reduced, and materials are saved; the method has the advantages of being simple in structure, convenient to operate, free of cable ropes or buttress structures, capable of reducing construction measures and potential influences on the silo wall, capable of releasing the construction space of the silo bottom, capable of greatly improving the construction efficiency, and capable of adjusting the stress condition of the tension piece at any time through the center hole jack so as to ensure that the bailey truss platform is in a proper state.

Description

Technical Field

[0001] The utility model relates to the technical field of temporary construction platforms, in particular to a supportless Bailey truss system for silo construction. Background Technique

[0002] For the storage of grain, oil, rice, flour, etc., the more common form is silos, usually including two main forms: steel structure silos and concrete silos. Among them, concrete silos have more advantages in economic indicators.

[0003] Generally, the main wall structure of a concrete silo is constructed by the slip form process. After being lifted to the designed height, a hollow cylindrical structure is formed. In order to construct the silo top structure, the Bailey truss process is mainly adopted at present. The traditional Bailey truss structure is similar to the keel of an umbrella, with a main steel column landing in the middle, and a truss structure arranged along the circumference of the silo is supported above it to carry the upper load and serve as a construction platform.

[0004] The disadvantages of the above traditional Bailey truss are that its central column is a full-height landing column. On the one hand, the steel consumption is very large and it occupies the construction space of the silo bottom structure, causing construction difficulties. On the other hand, the slenderness ratio of the central column is relatively large, and guy ropes or buttress structures need to be set to maintain the compression stability of the column. If a buttress structure is set, embedded parts need to be set on the silo wall, increasing the leakage risk of the silo. The above problems will lead to an increase in the construction cost and construction period of the silo structure, and will also affect the use function of the silo to a certain extent. Summary of the Invention

[0005] The purpose of the utility model is to provide a supportless Bailey truss system for silo construction according to the deficiencies of the above-mentioned prior art. By adopting a structure system similar to a beam string structure, a tension rod (or wire rope) is arranged between the bottom of the central column and the upper truss, so that the Bailey truss itself becomes a stable structure with load-bearing capacity, which can be supported only on the silo wall; the space at the bottom of the silo can be released, the guy ropes or buttress structures can be cancelled, and the construction of the silo top and bottom can be carried out synchronously, reducing costs and shortening the construction period.

[0006] The purpose of the utility model is achieved by the following technical solutions:

[0007] A supportless Bailey truss system for silo construction, characterized in that: it includes standard truss units and a central column. Among them, a plurality of the standard truss units are arranged in a circular array with the central column as the center. A fixed connection is formed between the inner ends of each of the standard truss units and the top of the central column. The outer ends of each of the standard truss units are placed on the silo wall, and the ends on this side are fixedly connected to the bottom of the central column through tension members, forming a self-balanced and load-bearing stable structure, which serves as a construction platform for the upper structure of the silo.

[0008] The center includes a supporting column section, at least one standard column section, and a bottom supporting column section from top to bottom in the height direction. The supporting column section is arranged at the top of the standard column section and is fixedly connected to the standard truss unit. The bottom supporting column section is arranged at the bottom of the standard column section and is fixedly connected to the tension member.

[0009] A steel disc is arranged at the bottom of the bottom supporting column section, and a connection hole for fixedly connecting with the tension member is opened on the steel disc.

[0010] Connection devices are respectively arranged at the upper and lower ends of the standard column section. This connection device is used for the connection between the standard column section and the supporting column section or the bottom supporting column section, and when using more than one standard column section, for the connection between each standard column section. By increasing or decreasing the standard column section, the length of the central column can be adjusted.

[0011] A number of stiffening steel corbels are evenly arranged along the circumferential direction at the upper part of the supporting column section. A steel corbel for fixedly connecting with the standard truss unit is arranged above the stiffening steel corbel, and a stiffening box-shaped steel ring beam for fixedly connecting with the standard truss unit is arranged at the top of the supporting column section.

[0012] The stiffening box-shaped steel ring beam is used to be closely connected with the upper chord of the standard truss unit, to resist the horizontal force generated by the tension member, and reduce the shear force borne by the high-strength bolts at the connection, so as to maintain the stability of the whole system.

[0013] The bottom supporting column section, the standard column section, and the supporting column section can all adopt circular steel pipes.

[0014] One end of the standard truss unit is provided with a telescopic device for placing on the silo wall. The telescopic device can be adjusted in length within a certain range to adapt to possible construction errors. The other end of the standard truss unit is provided with a steel corbel for fixedly connecting with the central column.

[0015] A through jack is arranged at the position of the standard truss unit corresponding to the tension member, and prestress can be applied or its length can be adjusted through the tension member to ensure the levelness of the construction platform.

[0016] The tension member is a tie rod or wire rope, which can be composed of round steel, steel wire rope or steel strand, and its cross-sectional area is determined according to the calculation. It can also be an overall servo-controlled hydraulic rod. If a hydraulic rod is used, the through jack can be cancelled.

[0017] The advantages of the present utility model are:

[0018] 1) The length of the central column can be greatly reduced, saving materials;

[0019] 2) No guy ropes or buttress structures are required, reducing construction measures and potential impacts on the silo wall;

[0020] 3) The construction space at the bottom of the silo is released, which can greatly improve construction efficiency;

[0021] 4) Through the through-hole jack, the stress of the tension member can be adjusted at any time to ensure that the Bailey truss platform is in a proper state. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present utility model;

[0023] Figure 2 is Figure 1 the top view of

[0024] Figure 3 is a schematic structural diagram of the standard truss unit in the present utility model;

[0025] Figure 4 is a schematic structural diagram of the bottom support column in the present utility model;

[0026] Figure 5 is a schematic structural diagram of the standard column section in the present utility model;

[0027] Figure 6 is a schematic structural diagram of the supporting column section in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The features of the present utility model and other related features are further described in detail below with reference to the accompanying drawings through embodiments for the understanding of those skilled in the same industry:

[0029] As Figures 1-6 shown, the reference numerals 1-14 in the figure respectively represent: standard truss unit 1, bottom support column section 2, standard column section 3, supporting column section 4, tension member 5, through-hole jack 6, high-strength bolt 7, telescopic device 8, steel corbel 9, through-hole jack 10, steel disc 11, stiffened steel corbel 12, steel plate 13, and stiffened box-shaped steel ring beam 14.

[0030] Embodiment: As Figures 1 to 6 shown, the unsupported Bailey truss system for silo construction in this embodiment includes: standard truss unit 1, bottom support column section 2, standard column section 3, supporting column section 4, tension member 5, and through-hole jack 6.

[0031] Combined with Figure 1 and Figure 2 shown, the standard truss units 1 are evenly arranged along the circumference of the silo wall. One end is provided with a telescopic device 8 for being erected on the silo wall and can also be adjusted to a certain extent according to construction errors. The other end is provided with a steel corbel 9, which is connected to the top of the supporting column section 4 through high-strength bolts 7.

[0032] As Figure 1 shown in the figure, the bottom support column section 2, the standard column section 3, and the supporting column section 4 form the central column. Among them, the supporting column section 4 is arranged above the standard column section 3, and the bottom support column section 2 is arranged below the standard column section 3. The bottom of the bottom support column section 2 is connected to the through jack 6 arranged at the outer end of the standard truss unit 1 through the tension member 5, thus forming a self-balanced structural system with load-bearing capacity.

[0033] At this time, the working principle of this embodiment is: using the tension member 5 to combine the standard truss unit 1 and the central column into a structural system with load-bearing capacity, and integrally installing it on the top of the silo, so as to release the construction space at the bottom of the silo (there are no longer floor-standing columns), and save a large amount of materials and related auxiliary facilities.

[0034] As Figure 4 shown in the figure, a steel disc 11 is arranged at the bottom of the bottom support column section 2. The steel disc 11 is perforated, and the tension member 5 passes through the perforation and is fixed. The thickness of the steel disc 11 is determined according to the force calculation.

[0035] As Figure 5 shown in the figure, the appropriate length of the central column is determined according to the force calculation and adjusted through the standard column section 3. Connecting devices for connecting with adjacent column sections are arranged at the upper and lower ends of the standard column section 3 to achieve the effect of modular installation and improve the construction efficiency.

[0036] As Figure 6 shown in the figure, a stiffened steel corbel 12 is arranged above the supporting column section 4, and there is a steel plate 13 on it for connecting with the standard truss unit 1; a protruding stiffened box-shaped steel ring beam 14 is arranged at the top of the supporting column section 4 for tightly connecting with the end of the standard truss unit 1 to bear and resist the horizontal force generated by the tension member 5, reduce the shear force borne by the high-strength bolts 7 at the connection, and maintain the stability of the whole system.

[0037] As Figure 1 shown in the figure, the unsupported Bailey truss system should be pre-assembled on the ground, at least two mutually perpendicular standard truss units 1 and the corresponding tension members 5 are arranged to make it have its own stability, and then it is integrally hoisted to the top of the silo, and the remaining standard truss units 1 are installed one by one and symmetrically. Finally, the flatness of the construction platform is adjusted through the through jack 6. During the use process, the flatness of the platform should be measured regularly. If there are problems, it should be adjusted in time through the through jack 6.

[0038] Although the above embodiments have described in detail the concept and embodiments of the purpose of the present invention with reference to the drawings, those of ordinary skill in the art can recognize that various improvements and transformations can still be made to the present invention without departing from the scope defined by the claims. Therefore, they are not elaborated one by one here.

Claims

1. A supportless Bailey truss system for silo construction, characterized in that: It includes standard truss units and a central column. A plurality of the standard truss units are arranged in a circular array centered on the central column. A fixed connection is formed between the inner ends of each of the standard truss units and the top of the central column. The outer ends of each of the standard truss units are placed on the silo wall, and the ends on this side are fixedly connected to the bottom of the central column through tension members, forming a self-balanced and load-bearing stable structure.

2. The unbraced Bailey truss system for silo construction according to claim 1, characterized in that: The center includes, from top to bottom in the height direction, a supporting column section, at least one standard column section, and a bottom supporting column section. The supporting column section is arranged at the top of the standard column section and is fixedly connected to the standard truss unit. The bottom supporting column section is arranged at the bottom of the standard column section and is fixedly connected to the tension member.

3. The un-supported Bailey truss system for silo construction according to claim 2, wherein: A steel disc is arranged at the bottom of the bottom supporting column section, and connection holes for fixedly connecting with the tension member are formed in the steel disc.

4. The unbraced Bailey truss system for silo construction according to claim 2, wherein: Connection devices are respectively arranged at the upper and lower ends of the standard column section. The connection devices are used for the connection between the standard column section and the supporting column section or the bottom supporting column section, and for the connection between each standard column section when more than one standard column section is used.

5. The un-supported Bailey truss system for silo construction according to claim 2, wherein: A number of stiffening steel corbels are evenly arranged along the circumferential direction at the upper part of the supporting column section. A steel corbel for fixedly connecting with the standard truss unit is arranged above the stiffening steel corbels. A stiffening box-shaped steel ring beam for fixedly connecting with the standard truss unit is arranged at the top of the supporting column section.

6. The unbraced Bailey truss system for silo construction according to claim 1, wherein: A telescopic device for placing on the silo wall is arranged at one end of the standard truss unit, and the length of the telescopic device can be adjusted within a certain range. A steel corbel for fixedly connecting with the central column is arranged at the other end of the standard truss unit.

7. A supportless Bailey truss system for silo construction according to claim 1 or 6, characterized in that: A through jack is arranged at the position of the standard truss unit corresponding to the tension member for adjusting the length of the tension member.

8. A supportless Bailey truss system for silo construction according to claim 1, characterized in that: The tension member is a tie rod or a wire rope.

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