CN214219398U - Large-gradient door opening support - Google Patents
Large-gradient door opening support Download PDFInfo
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- CN214219398U CN214219398U CN202022934923.8U CN202022934923U CN214219398U CN 214219398 U CN214219398 U CN 214219398U CN 202022934923 U CN202022934923 U CN 202022934923U CN 214219398 U CN214219398 U CN 214219398U
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Abstract
The utility model discloses a heavy grade door opening support, including the concrete foundation, bottom fixed connection is in four stands on the concrete foundation, be fixed in the sandbox on every stand top, the door opening truss of the double-pin I-steel that two horizontal levels set up and a plurality of mutual parallel arrangement, the equal vertical and vertical setting of a plurality of door opening trusses, the part that every door opening truss is close to both ends is fixed in respectively on two double-pin I-steels, every door opening truss is the trapezium structure of crouching down form, every door opening truss all includes the lower chord member that the level set up, the last chord member of putting to one side and connect a plurality of montants and a plurality of down chord member between last chord member and lower chord member, the last chord member of a plurality of door opening trusses is located same inclined plane. The utility model discloses simple structure, equipment convenience, satisfy in the finite space under the prerequisite of heavy grade commodity circulation passageway construction, guarantee the normal work of construction access road.
Description
Technical Field
The utility model relates to a heavy grade commodity circulation passageway construction field specifically is a heavy grade door opening support.
Background
The standing platform type logistics channel often needs to cross the existing road, a door opening support structure form is often adopted to guarantee normal passing of the construction access road, for the high-gradient logistics channel, the construction space is relatively narrow, the existing door opening support form often cannot guarantee the clearance requirement of normal passing of the construction access road, the site clearance can be increased by downwards excavating the self-construction access road, the construction period is long, the engineering quantity is large, and the construction cost is greatly increased.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a heavy grade door opening support, under the prerequisite that satisfies the heavy grade logistics channel construction in the finite space, guarantee the normal work of construction access.
The technical scheme of the utility model is that:
a high-gradient door opening support comprises a concrete foundation, four upright posts, a sandbox, two horizontally arranged double-spliced I-beams and a plurality of door opening trusses, wherein the bottom ends of the four upright posts are fixedly connected to the concrete foundation, the sandbox is fixed at the top end of each upright post, the two horizontally arranged double-spliced I-beams are arranged in parallel, the two double-spliced I-beams are arranged horizontally and are parallel to each other, the parts, close to the two ends, of each double-spliced I-beam are respectively fixed at the top ends of the two sandboxs, a plurality of door opening trusses are arranged vertically and longitudinally, the parts, close to the two ends, of each door opening truss are respectively fixed on the two double-spliced I-beams, each door opening truss is of a horizontal trapezoidal structure, each door opening truss comprises a horizontally arranged lower chord, an obliquely arranged upper chord, a plurality of vertical rods and a plurality of inclined rods, the front end of the upper chord is higher than the horizontal height of the rear end of the upper chord, and the two ends of the lower chord of each door opening truss are respectively fixedly connected with the two double-spliced I-beams, the upper chords of the door opening trusses are located on the same inclined plane.
The bottom of each stand all be fixed in on a concrete foundation that corresponds, the equal pre-buried steel sheet in top of polylith concrete foundation, the bottom of each stand is connected with the pre-buried steel sheet full weld that corresponds.
And in the four upright columns, two upright columns which are symmetrical along the longitudinal axis of the door opening support are connected with each other through a cross brace.
And reinforcing pull rods are connected among the door opening trusses.
And the door opening trusses are welded with the two double-spliced I-shaped steels through round steel with the diameter of 18 mm.
The sandbox is welded to the top end of each upright post, and the height of the sandbox is not more than 5 cm.
The utility model has the advantages that:
(1) the utility model discloses welding process is carried out on the construction site, simple structure, and the equipment is convenient, can save the site operation time.
(2) The utility model discloses solved construction pavement effectively and had not enough problem with beam slab bottom headroom, can reduce the whole height of support under the prerequisite of guaranteeing the normal construction of heavy grade commodity circulation channel beam slab to ensure that the construction pavement has sufficient headroom height, satisfy all kinds of construction machinery current.
(3) The utility model discloses door opening truss structure is light, and maneuverability is strong, uses small-size hoisting machinery to accomplish the installation, has guaranteed the installation demand in the finite space, has effectively avoided the collision problem of large-scale hoisting machinery during operation and the cast-in-place letter case roof beam in both sides, has reduced the construction risk.
(4) The utility model discloses door opening truss simple structure, the ann tears the convenience open, has sufficient bearing capacity, and used repeatedly many times has reduced construction cost.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a schematic structural view of the door opening truss of the present invention.
In the upper drawing, 1-concrete foundation, 2-upright column, 3-sandbox, 4-double H-shaped steel, 5-door opening truss, 6-cross brace, 7-large-gradient beam slab, 8-upturning beam, 51-lower chord, 52-upper chord, 53-vertical bar and 54-diagonal bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, a large-gradient door opening support comprises four concrete foundations 1, four upright posts 2 with bottom ends respectively fixedly connected to pre-buried steel plates at the top ends of the corresponding concrete foundations 1, a sandbox 3 welded and fixed at the top end of each upright post 2, two horizontally arranged double-spliced I-shaped steels 4 and a plurality of door opening trusses 5 arranged in parallel;
each concrete foundation 1 is 2.5m long, 1m wide and 0.8m high, and adopts a reinforced concrete structure;
each upright post 2 is a steel pipe upright post with the diameter of 529mm and the wall thickness of 10mm, and 14a shear braces 6 are connected between two upright posts 2 which are symmetrical along the longitudinal axis of the door opening support in the four upright posts 2, so that the stability of the door opening support is improved;
the height of each sandbox 3 is equal and is not more than 5 cm; each double-spliced I-steel 4 is a double-spliced 45b I-steel with the length of 9m, the two double-spliced I-steels 4 are transversely arranged and are parallel to each other, and the parts, adjacent to the two ends, of each double-spliced I-steel 4 are welded to the top ends of the corresponding two sandboxes 3 respectively;
the door opening trusses 5 are all vertically arranged, the reinforcing pull rods are connected between the door opening trusses 5, the parts, close to two ends, of each door opening truss 5 are fixed on the two double-spliced I-shaped steels 4 respectively, each door opening truss 5 is of a horizontal trapezoidal structure, each door opening truss 5 comprises a lower chord 51, an upper chord 52, a plurality of vertical rods 53 and a plurality of inclined rods 54, the upper chord 52 is arranged in an inclined mode, the vertical rods 53 and the inclined rods 54 are connected between the upper chord 52 and the lower chord 51, the horizontal height of the front end of the upper chord 52 is higher than that of the rear end of the upper chord, the upper chord 52, the lower chord 51 and the vertical rods 53 are all made of 12# channel steel, the inclined rods 54 are made of 10# channel steel, two end portions of each door opening truss lower chord 51 are welded and fixed with the two double-spliced I-shaped steels 4 through phi 18mm round steel respectively, and the upper chords 52 of the door opening trusses are located on the same inclined plane.
The door opening support that the installation was accomplished is inspected and is accepted the qualification, ensures that the door opening support does not produce under the wind load effect and rocks, causes adverse effect to construction safety.
During the concrete implementation, the load which has the highest frequency and plays a control role in the door opening support structure during the construction comprises the dead weight P of the reinforced concrete1＝55.35kN/m2(ii) a Self weight P of template2＝6kN/m3(ii) a Load P generated by vibrating concrete3＝2KN/m2(ii) a Considering the load P of the constructor and the construction machine4＝2.5kN/m2(ii) a Concrete side pressure P54.0 Kpa. And selecting the novel truss with the largest stress for analysis according to the arrangement position of the support and the load distribution condition. According to the road and bridge construction calculation manual, the standard value of the load design value when the structural strength is calculated is multiplied by the corresponding fractional coefficient (the fractional coefficient of the permanent load is 1.2; the fractional coefficient of the variable load is 1.4).
The door opening truss is integrally modeled by adopting finite element analysis software, the bearing capacity of the door opening truss is analyzed under the action of the load, the checking result of the door opening support structure is shown in table 1 in combination with relevant specifications, and the structural performance of the door opening support meets the construction use requirement.
TABLE 1 door opening support structure calculation result table
| Name (R) | Calculated value | Allowable value of component | Remarks for note |
| Bending moment (door opening truss) | 7.13kN·m | / | Satisfy the requirement of |
| Shear (door opening truss) | 33.26kN | / | Satisfy the requirement of |
| Combined stress (door opening truss) | 118.7MPa | 215MPa | Satisfy the requirement of |
| Deflection (door opening truss) | 2.7mm | 7000/400＝17.55mm | Satisfy the requirement of |
| Support counter-force (door opening truss channel steel) | 18.13kN | / | Satisfy the requirement of |
| Stress (double splicing I-steel) | 12.6MPa | 205MPa | Satisfy the requirement of |
| Deflection (double splicing I-steel) | 5.9mm | 5400/400＝13.5mm | Satisfy the requirement of |
| Stress (column) | 9.14Mpa | 205Mpa | Satisfy the requirement of |
| Slenderness ratio (column) | 20 | 150 | Satisfy the requirement of |
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a heavy grade door opening support which characterized in that: the steel door comprises a concrete foundation, four upright posts, a sandbox, two horizontally arranged double-spliced I-beams and a plurality of door opening trusses, wherein the bottom ends of the four upright posts are fixedly connected to the concrete foundation, the sandbox is fixed at the top end of each upright post, the two horizontally arranged double-spliced I-beams and the door opening trusses are arranged in parallel, the two double-spliced I-beams are transversely arranged and are parallel to each other, the parts, close to the two ends, of each double-spliced I-beam are respectively fixed at the top ends of the two corresponding sandboxes, the door opening trusses are vertically and longitudinally arranged, the parts, close to the two ends, of each door opening truss are respectively fixed on the two double-spliced I-beams, each door opening truss is of a horizontal inverted trapezoidal structure and comprises a lower chord, an obliquely arranged upper chord, a plurality of vertical bars and a plurality of inclined bars which are connected between the upper chord and the lower chord, the horizontal height of the front end of the upper chord is higher than that of the rear end of the upper chord, and the two end of the lower chord of each door opening truss are respectively fixedly connected with the two double-spliced I-beams, the upper chords of the door opening trusses are located on the same inclined plane.
2. A large-gradient door opening support as claimed in claim 1, wherein: the bottom of each stand all be fixed in on a concrete foundation that corresponds, the equal pre-buried steel sheet in top of polylith concrete foundation, the bottom of each stand is connected with the pre-buried steel sheet full weld that corresponds.
3. A large-gradient door opening support as claimed in claim 1, wherein: and in the four upright columns, two upright columns which are symmetrical along the longitudinal axis of the door opening support are connected with each other through a cross brace.
4. A large-gradient door opening support as claimed in claim 1, wherein: and reinforcing pull rods are connected among the door opening trusses.
5. A large-gradient door opening support as claimed in claim 1, wherein: and the door opening trusses are welded with the two double-spliced I-shaped steels through round steel with the diameter of 18 mm.
6. A large-gradient door opening support as claimed in claim 1, wherein: the sandbox is welded to the top end of each upright post, and the height of the sandbox is not more than 5 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022934923.8U CN214219398U (en) | 2020-12-09 | 2020-12-09 | Large-gradient door opening support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022934923.8U CN214219398U (en) | 2020-12-09 | 2020-12-09 | Large-gradient door opening support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214219398U true CN214219398U (en) | 2021-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022934923.8U Active CN214219398U (en) | 2020-12-09 | 2020-12-09 | Large-gradient door opening support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214219398U (en) |
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2020
- 2020-12-09 CN CN202022934923.8U patent/CN214219398U/en active Active
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