CN220167130U - Bottom structure of antiknock shelter - Google Patents

Abstract

The utility model provides a bottom structure of an antiknock shelter mounted on a steel structure platform, comprising: a bottom part, four main frame beams and a plurality of support members; the bottom part comprises a flat plate and a corrugated plate; the corrugated plate comprises a plurality of groups of corrugated unit elements which are sequentially connected, and each group of corrugated unit elements comprises an upper chord plate, a lower chord plate and two middle connecting plates; the four main frame beams are respectively connected with the periphery of the corrugated plate, each main frame beam is I-steel, and the top surfaces of the upper wing plates of the main beams of all the main frame beams are connected with the bottom surface of the flat plate; the main girder webs of the two main frame girders are respectively connected with the lower chord plates at the two ends of the corrugated plate; the lower chord plates of the plurality of groups of corrugated single elements are provided with supporting members, each supporting member is arranged on one lower chord plate, and the supporting members are channel steel. The bottom structure can overcome the defect that the rigidity of the bottom structure of the existing antiknock shelter is overlarge and the vibration response is overlarge under the action of explosion load, so that the bottom structure can be well adapted to the working environment of a steel structure platform.

Description

Bottom structure of antiknock shelter

Technical Field

The utility model relates to the technical field of engineering antiknock, in particular to a bottom structure of an antiknock shelter which is fixedly arranged on a steel structure platform.

Background

With the world's intensive development of petroleum and natural gas energy, such as steel-structured drilling and oil production platforms, the focus of design is on how to ensure safe production. Fire and explosion are always the main factors endangering the safety of the platform, but due to the limitation of the working environment of the steel structure platform, people are difficult to evacuate beyond the safe distance in time. At this point, an anti-knock shelter is a suitable choice.

Unlike chemical plant areas, it is difficult to find a complete reinforced concrete foundation as its base for an antiknock shelter on a steel structure platform, most of which are mounted directly on brackets formed by the intersection of the horizontal girders of the platform steel structure. Specifically: first, the bottom of the anti-knock shelter placed on the foundation is hardly affected by shock waves when the bottom of the anti-knock shelter is in direct contact with the ground, and the bottom of the anti-knock shelter of the steel structure platform needs to bear shock wave loads from bottom to top, so that the anti-knock shelter of the steel structure platform needs to fully consider the anti-knock capability of the bottom. Secondly, instrument and personnel in the antiknock shelter are all located on the bottom plate part, can produce very big vertical vibration acceleration when the bottom receives instantaneous impact, cause the injury to personnel to seriously influence the function of using of precision instruments, how effectual reduction bottom structure is the impact response under the explosive load also is the key of design. Thirdly, the anti-knock shelter is fixed on the frame of the steel structure platform, and if impact load is transmitted to the frame of the steel structure platform too much, a large burden is caused to the frame, so that the safety of the whole structure of the steel structure platform is endangered. Therefore, how to effectively reduce the reaction force of the anti-blast shelter to the frame of the steel structural platform is also a consideration.

As shown in fig. 1, the existing anti-knock shelter is based on the design concept of a container, and the existing bottom structure of the anti-knock shelter comprises a bottom plate part, four main frame beams 1 and a plurality of supporting members 2; the bottom plate component comprises a corrugated plate 4 and a flat plate 3 arranged above the corrugated plate 4, four main frame beams 1 are respectively connected with the periphery of the corrugated plate 4, the main frame beams 1 adopt square steel pipes, and all the main frame beams 1 surrounding the periphery of the corrugated plate 4 form a cube structure; the top surface of each main frame beam 1 is connected with a flat plate 3; the bottom surface of the main frame beam 1 is connected with a connecting cushion block; the corrugated plate 4 includes a plurality of groups of corrugated unit elements connected in sequence, all of the corrugated unit elements being sequentially arranged along the width direction of the corrugated plate 4, each group of corrugated unit elements including an upper chord 43, a lower chord 41 and two intermediate connection plates 42, the lower chord 41, one of the intermediate connection plates 42, the upper chord 43 and the other intermediate connection plate 42 being sequentially connected; the upper chord 43 has a higher level than the lower chord 41; in the width direction of the corrugated plate 4, the lower chord plates 41 of the corrugated unit elements at both edges of the corrugated plate 4 are connected to the main frame girder 1, and the support members 2 are provided on the lower chord plates 41 of the other sets of corrugated unit elements of the corrugated plate 4; the bottom surface of each support member 2 is connected to a corresponding lower chord 41, and the top surface of each support member 2 is connected to the flat plate 3. The supporting member 2 is a steel pipe with a rectangular cross section; a plurality of support members 2 are added between the two main frame beams 1, and the support members 2 are welded with the corrugated plates 4 to resist lateral displacement caused by the stress of the corrugated plates 4.

The bottom structure of the existing antiknock shelter has the advantages that: the flat plate 3 and the corrugated plate 4 which are positioned at the inner layer and the outer layer are tightly connected through the supporting member 2, the structure is compact, the integrity is good, the rigidity is high, the supporting member 2, the flat plate 3 and the corrugated plate 4 bear shock wave load jointly, and the deformation is small. The existing bottom structure of the anti-knock shelter has the disadvantages that: the high overall stiffness of the anti-knock shelter results in a high vibrational response under impact load and a high vibrational acceleration of the panel 3. For the side panels and top panels of the anti-blast shelter, they do not directly contact the equipment and personnel, so the impact of the short time high vibration acceleration response is small. However, for the bottom structure, because the bottom structure directly carries the instrument and personnel, the safety of the personnel can be endangered due to the excessively high vibration acceleration, and the use function of the instrument is seriously affected, which is an important difference between the antiknock shelter in the existing factory and the antiknock shelter of the steel structure platform and the defect that the existing antiknock shelter is applied to the steel structure platform. In addition, the main frame beam 1 of the existing bottom structure is compact in structure, large in bending rigidity, small in deformation under the impact effect, and when the corrugated plate 4 of the antiknock shelter is subjected to impact load, the impact force is transferred to the frame of the steel structure platform at the bottom through the main frame beam 1 more completely, so that the integral strength of the steel structure platform is not good.

Disclosure of Invention

In view of the above-described drawbacks of the prior art, the present utility model has been made to solve the above-described problems, and an object thereof is to provide a bottom structure of an anti-knock shelter capable of reducing impact vibration applied to an upper flat plate and reducing impact reaction force transmitted to a steel structure platform frame.

To achieve the above and other related objects, the present utility model provides a base structure for an anti-knock shelter, comprising: a bottom part, four main frame beams and a plurality of support members;

the bottom part comprises a flat plate and a corrugated plate arranged below the flat plate; the corrugated plates comprise a plurality of groups of corrugated unit elements which are sequentially connected, all the corrugated unit elements are sequentially arranged along the width direction of the corrugated plates, each group of corrugated unit elements comprises an upper chord plate, a lower chord plate and two middle connecting plates, and the lower chord plate, one middle connecting plate, the upper chord plate and the other middle connecting plate are sequentially connected; the horizontal height of the upper chord plate is higher than that of the lower chord plate;

the four main frame beams are respectively connected with the periphery of the corrugated plate, each main frame beam is I-steel, and each main frame beam comprises a main beam upper wing plate, a main beam web plate and a main beam lower wing plate which are sequentially connected from top to bottom; the top surfaces of the main girder upper wing plates of all the main frame girders are connected with the bottom surface of the flat plate; along the width direction of the corrugated plate, the main girder webs of the two main frame girders which are sequentially arranged are respectively connected with the lower chord plates at the two ends of the corrugated plate;

the lower chord plates of the plurality of groups of corrugated single elements are provided with supporting members, each supporting member is arranged on one lower chord plate, the supporting members are channel steel, and each supporting member comprises an upper plate body, a side plate piece and a lower plate body which are sequentially connected; the lower plate body of each support member is connected to the corresponding lower chord.

Preferably, the bottom structure of the anti-knock shelter further comprises at least one intermediate auxiliary beam; the middle auxiliary beam is I-steel, and comprises an auxiliary beam upper wing plate, an auxiliary beam web plate and an auxiliary beam lower wing plate which are sequentially connected from top to bottom;

the auxiliary girder web plate of each intermediate auxiliary girder is connected with the lower chord plate of one corrugated single element, and the auxiliary girder upper wing plate of each intermediate auxiliary girder is connected with the bottom surface of the flat plate.

Preferably, the connection part of the main frame beam and the lower chord plate is a main beam connection position, and the height of the main beam connection position is less than or equal to one half of the height of the main frame beam.

Preferably, each main frame beam is fixed on a connecting cushion block, and the connecting cushion blocks are welded on the steel structure platform.

As described above, the bottom structure of the anti-knock shelter of the present utility model has the following beneficial effects:

in the bottom structure of the antiknock shelter, the main frame beams are I-steel, the four main frame beams are respectively connected with the periphery of the corrugated plate, and the flat plate is connected with the corrugated plate through the main frame beams; the supporting member is channel steel, the supporting member is connected with the corrugated plate, a space is reserved between the supporting member and the flat plate, then the flat plate is separated from the corrugated plate in the area between the two main frame beams along the width direction of the corrugated plate, when explosion occurs, the double-layer structure formed by the flat plate and the corrugated plate can separate the impacted corrugated plate from the flat plate, so that the impact effect is not directly transmitted to the flat plate, the impact vibration suffered by the flat plate is effectively reduced, and the safety of internal precise instruments and personnel is protected; because the bending rigidity of the corrugated plate and the supporting member is low and enough plastic deformation space is provided, the energy absorption effect of the bottom part can be obviously improved, the impact reaction force transferred to the frame of the steel structure platform is effectively reduced, and the overall impact resistance of the steel structure platform is ensured; the bottom structure can overcome the defect that the rigidity of the bottom structure of the existing antiknock shelter is overlarge and the vibration response is overlarge under the action of explosion load, so that the bottom structure can be well adapted to the working environment of a steel structure platform.

Drawings

Figure 1 shows a schematic view of the internal structure of a prior art anti-blast shelter in the width direction.

Figure 2 shows a schematic view of the internal structure of the bottom structure of the anti-blast shelter of the present embodiment in the width direction.

Figure 3 shows a schematic view of the structure of the base structure of the anti-blast shelter of this embodiment, with the vertical members attached and the instrument deployed.

Figure 4 shows a schematic perspective view of the enclosure of the four main frame beams of the base structure of the anti-blast shelter of this embodiment in a closed configuration.

Fig. 5 shows the acceleration time course at the first measuring point of the instrument when the inventive bottom structure is used and when the prior inventive bottom structure is used.

Fig. 6 shows the acceleration time course at the second measuring point of the instrument when the inventive bottom structure is used and when the prior inventive bottom structure is used.

Fig. 7 shows velocity time curves at a first measurement point and a second measurement point of the instrument when the base structure of the present utility model is employed and when the base structure of the present utility model is employed.

Fig. 8 shows the displacement time course curves at the first and second measuring points of the instrument when the base structure of the present utility model is used and when the base structure of the present utility model is used.

Fig. 9 shows a cross-sectional maximum reaction force time curve of the connecting pad when the bottom structure of the present utility model is used and the conventional bottom structure of the present utility model is used.

Fig. 10 shows the energy absorbed time course curve with the base structure of the present utility model and with the base structure of the present utility model.

Description of the reference numerals

1. Main frame beam

2. Support member

3. Flat plate

4. Corrugated plate

41. Bottom chord

42. Intermediate connecting plate

43. Upper chord plate

100. Main frame beam

110. Main girder upper wing plate

120. Girder web

130. Main girder lower wing plate

200. Support member

210. Upper plate body

220. Side plate

230. Lower plate body

300. Flat plate

400. Corrugated plate

410. Corrugated unit element

411. Upper chord plate

412. Bottom chord

413. Intermediate connecting plate

500. Intermediate auxiliary beam

510. Auxiliary beam upper wing plate

520. Auxiliary girder web

530. Auxiliary beam lower wing plate

600. Connecting cushion block

701. First measuring point

702. Second measuring point

801. Vertical component

802. Top structure

900. Instrument for measuring and controlling the intensity of light

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

Please refer to the accompanying drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

As shown in fig. 2-10, the bottom structure of the anti-blast shelter of the present embodiment comprises: a bottom part, four main frame beams 100 and a plurality of support members 200;

the bottom part includes a flat plate 300 and a corrugated plate 400 disposed under the flat plate 300; the corrugation plate 400 includes a plurality of sets of corrugation unit pieces 410 connected in sequence, all of the corrugation unit pieces 410 being sequentially arranged along a width direction of the corrugation plate 400, each of the sets of corrugation unit pieces 410 including an upper chord 411, a lower chord 412, and two intermediate connection plates 413, the lower chord 412, one of the intermediate connection plates 413, the upper chord 411, and the other intermediate connection plate 413 being sequentially connected; the upper chord 411 has a higher level than the lower chord 412;

the four main frame beams 100 are respectively connected with the periphery of the corrugated plate 400, the main frame beams 100 are I-shaped steel, and the main frame beams 100 comprise a main beam upper wing plate 110, a main beam web plate 120 and a main beam lower wing plate 130 which are sequentially connected from top to bottom; the top surfaces of the main girder upper wing plates 110 of all the main frame girders 100 are connected with the bottom surface of the flat plate 300; along the width direction of the corrugated plate 400, the girder webs 120 of the two main frame girders 100 sequentially arranged are respectively connected with the lower chord plates 412 at both ends of the corrugated plate 400; the girder web 120 is connected with the connected lower chord 412 by welding; the main girder upper wing plate 110 of the main frame girder 100 is welded with the flat plate 300;

the lower chord plates 412 of the plurality of groups of corrugated unit elements 410 are provided with supporting members 200, each supporting member 200 is installed on one lower chord plate 412, the supporting members 200 are channel steel, and the supporting members 200 comprise an upper plate body 210, a side plate 220 and a lower plate body 230 which are sequentially connected; the lower plate body 230 of each support member 200 is connected to a corresponding lower chord 412.

In the bottom structure of the anti-explosion shelter of the utility model, the main frame beams 100 are I-steel, four main frame beams 100 are respectively connected with the periphery of the corrugated plate 400, and the flat plate 300 is connected with the corrugated plate 400 through the main frame beams 100; the supporting member 200 is a channel steel, the supporting member 200 is connected with the corrugated plate 400, and a space is reserved between the supporting member 200 and the flat plate 300, so that the flat plate 300 is separated from the corrugated plate 400 along the width direction of the corrugated plate 400 in the area between the two main frame beams 100, and when explosion occurs, the double-layer structure formed by the flat plate 300 and the corrugated plate 400 can separate the impacted corrugated plate 400 from the flat plate 300, so that the impact effect is not directly transmitted to the flat plate 300, the impact vibration suffered by the flat plate 300 is effectively reduced, and the safety of internal precise instruments and personnel is protected; because the bending rigidity of the corrugated plate 400 and the supporting member 200 is low and enough plastic deformation space is provided, the energy absorption effect of the bottom part can be obviously improved, the impact reaction force transferred to the frame of the steel structure platform is effectively reduced, and the overall impact resistance of the steel structure platform is ensured; the bottom structure can overcome the defect that the rigidity of the bottom structure of the existing antiknock shelter is overlarge and the vibration response is overlarge under the action of explosion load, so that the bottom structure can be well adapted to the working environment of a steel structure platform.

The bottom structure of the anti-knock shelter, further comprising at least one intermediate auxiliary beam 500; the middle auxiliary beam 500 is I-steel, and the middle auxiliary beam 500 comprises an auxiliary beam upper wing plate 510, an auxiliary beam web 520 and an auxiliary beam lower wing plate 530 which are sequentially connected from top to bottom;

the auxiliary girder web 520 of each intermediate auxiliary girder 500 is connected to the lower chord 412 of one corrugated unit piece 410, and the auxiliary girder upper wing 510 of each intermediate auxiliary girder 500 is connected to the bottom surface of the flat plate 300. The secondary web 520 of the intermediate secondary beam 500 forms a staggered connection with the connected lower chord 412; the intermediate auxiliary beam 500, the main frame beam 100, and the support member 200 are respectively connected to different corrugated unit elements 410. Each of the intermediate auxiliary beams 500 extends in the same direction as the length direction of the corrugation plates.

Too large a distance between two oppositely disposed main frame beams 100 in the width direction of the corrugation plate 400 may cause insufficient rigidity of the bottom structure, so at least one intermediate auxiliary beam 500 is disposed between the two main frame beams 100 to improve the rigidity of the bottom structure. The plurality of intermediate auxiliary beams 500 may be disposed in a dispersed manner as needed.

The connection between the main frame beam 100 and the lower chord 412 is a main beam connection position, and the height of the main beam connection position is less than or equal to one half of the height of the main frame beam 100, so that a larger interval can be provided between the corrugated plate 400 and the flat plate 300, so that the impact applied to the impacted corrugated plate 400 is not directly transferred to the flat plate 300.

Each main frame beam 100 is fixed to a connection pad 600, and the connection pad 600 is welded to the steel structure platform so that the bottom structure is connected to the steel structure platform. The connection pad 600 is of a solid structure. The bottom of the main frame beam 100 and the connection pads 600 may be bolted or welded, and the number and spacing of the connection pads 600 disposed under each main frame beam 100 may be appropriately adjusted.

In the present embodiment, the number and the interval of the supporting members 200 arranged in the width direction of the corrugation plate 400 can be appropriately adjusted. The materials of the main frame beams 100, the support members 200, the flat plates 300, the corrugated plates 400, the intermediate auxiliary beams 500, and the connection pads 600 may be selected from any one of the following: carbon steel, stainless steel. The spacing between flat plate 300 and corrugated plate 400 is greater than the maximum vertical displacement of corrugated plate 400 under an explosive load.

A method of designing a base structure for an anti-knock shelter comprising the steps of:

s1: determining the size and thickness of the bottom corrugated plate 400, the depth and width of the corrugated structure of the corrugated plate 400, the size and spacing of the main frame beams 100 and the size and spacing of the supporting members 200 according to the anti-explosion impact fortification requirements, the bracket structure size of the steel structure platform and the explosion impact wave overpressure;

s2: calculating to obtain the vertical displacement of the corrugated plate 400 under the overpressure action of the explosion shock wave in the step S1, and determining the interval between the corrugated plate 400 and the flat plate 300 according to the vertical displacement;

s3: determining the size, thickness, and whether the support member 200 and the size of the support member 200 are required or not according to the interval between the corrugation plate 400 and the flat plate 300, the weight load of the internal instrument and the person, etc., determined in S2;

s4: and (3) building a structural finite element model according to the design scheme of the integral shelter, applying a design load to perform power analysis, examining the power response of the structural finite element model and comparing the power response with the design requirement, if the power response does not meet the requirement, repeating the steps S1 to S3 to perform structural optimization and reinforcement.

The bottom structure of the anti-explosion shelter optimizes the bottom structure form of the existing anti-explosion shelter, uses the I-shaped steel to replace the traditional square steel pipe as the main frame beam 100 at the bottom, reduces the section of the supporting member 200, and changes the section of the supporting member into a channel steel with thinner thickness; the flat plate 300 is separated from the corrugation plate 400, and the flat plate 300 and the corrugation plate 400 are welded to the main frame beam 100, respectively.

The bottom structure protects the delicate instruments and personnel inside the anti-riot shelter from the transient impacts and vibrations by separating the flat panel 300 from the corrugated panel 400 such that the blast impact cannot be directly transmitted to the flat panel 300. The bending rigidity of the corrugated plate 400 is reduced by reducing the section modulus of the supporting member 200, so that the corrugated plate 400 generates larger plastic deformation in the impact response process and absorbs more impact wave energy, thereby effectively reducing the counter-force peak value transmitted to the frame of the steel structure platform and being beneficial to the overall impact resistance of the steel structure platform.

In summary, the bottom structure of the anti-knock shelter can effectively reduce the bottom impact vibration response, thereby better protecting the safety of internal instruments and personnel and reducing the impact transmitted to the bracket of the steel structure platform through the energy absorption function. The bottom structure not only can be applied to antiknock shelters of steel structure drilling and oil production platforms, but also is applicable to other platform shelters mainly comprising steel frame structures, and has wide application prospect.

Example 1

As shown in fig. 2 to 10, the bottom structure of the existing anti-riot shelter of a steel structure drilling platform is arranged on the frame of the steel structure drilling platform through the connection cushion block 600, and according to explosion risk analysis, the bottom structure of the anti-riot shelter may be subjected to the action of explosion impact from bottom to top, so that the impact resistance of the bottom structure of the anti-riot shelter is ensured and needs to be considered in design: 1 controlling the counterforce of an anti-riot shelter to a frame of a steel structure drilling platform; 2 minimize impact on the internal equipment and personnel of the anti-riot shelter.

The bottom structure of the anti-riot shelter was subjected to an explosion shock wave reflected overpressure peak of 50kPa for 50ms, acting on the outer surface of the bottom structure of the anti-riot shelter in the form of a regular triangle load.

The four main frame beams 100 are sequentially connected to enclose a closed structure, and the intermediate auxiliary beams 500 are disposed at intervals of one fourth of the total width among the total widths between the two main frame beams 100 along the width direction of the corrugated plate 400. All vertical members 801 are welded to the top surface of the main girder upper wing plate 110 of the main frame girder 100. All vertical members 801 are connected to a roof structure 802.

The height of the main frame beam 100 is 300mm, the width of the main frame beam 100 is 150mm, the thickness of the girder web 120 is 6.5mm, and the thicknesses of the girder upper wing plate 110 and the girder lower wing plate 130 are 9mm.

The height of the intermediate auxiliary beam 500 is 300mm, the width of the intermediate auxiliary beam 500 is 150mm, the thickness of the auxiliary beam web 520 is 6.5mm, and the thicknesses of the auxiliary beam upper wing plate 510 and the auxiliary beam lower wing plate 530 are both 9mm.

All vertical members 801 are welded to the main girder upper wing plates 110 of the main frame girder 100. The bottom part is divided into a double-layer structure, the upper layer is a 5mm steel flat plate 300, the periphery of the upper layer is welded with the main beam upper wing plate 110 of the main frame beam 100, the lower layer is a 3mm steel corrugated plate 400, the corrugated plate 400 is separated from the upper layer flat plate 300 by a vertical distance of 220mm, and the periphery of the corrugated plate 400 is welded with the main beam web 120 of the main frame beam 100.

The corrugated plate 400 is provided with the supporting members 200 on the successive sets of corrugated unit pieces 410, and one supporting member 200 is provided on the lower chord 412 of each corrugated unit piece 410. The height of the support member 200 is 80mm, the width of the support member 200 is 40mm, the thickness of the side plate 220 of the support member 200 is 20mm, and the thicknesses of the upper plate body 210 and the lower plate body 230 of the support member 200 are 2.5mm. The lower plate body 230 of the support member 200 is welded with the corrugation plate 400.

As shown in fig. 3, the corrugated plate 400, the flat plate 300, the main frame beam 100, the vertical members 801 and the supporting members 200 are all made of Q235B steel, and have a yield strength of 235MPa, a tensile strength of 370MPa, an elastic modulus of 210GPa and a poisson ratio of 0.3. And (3) establishing a simulation model for effect comparison, wherein the size of a model grid is 20mm, and the calculation result is shown in table 1.

TABLE 1 summary of calculation results

As can be seen from the comparison of the above calculation results, in the case of almost the same steel consumption, the bottom structure of the antiknock shelter of the embodiment has two measuring points of the instrument 900, wherein one measuring point of the instrument 900 is the first measuring point 701 in fig. 3, and the other measuring point of the instrument 900 is the second measuring point 702 in fig. 3; the maximum acceleration at the two instrument 900 stations is 35% of the maximum acceleration produced at the two instrument 900 stations using the existing anti-knock shelter base structure, the maximum velocity at the two instrument 900 stations is 33% of the maximum velocity produced at the two instrument 900 stations using the existing anti-knock shelter base structure, and the maximum displacement at the two instrument 900 stations is 32% of the maximum displacement produced at the two instrument 900 stations using the existing anti-knock shelter base structure. In brief, the bottom structure of the anti-detonation shelter of the present embodiment substantially reduces the impact of the detonation on the internal equipment 900 and personnel. In addition, the maximum counterforce of the cross section of the connecting cushion block 600 in the bottom structural form of the anti-explosion shelter of the embodiment is 82% of that of the existing anti-explosion shelter, and the energy absorbed by the bottom structure is 325% of that of the existing anti-explosion shelter, which means that the bottom structural form of the embodiment can reduce the counterforce transmitted to the frame of the steel structural platform by absorbing more explosion energy, thereby better protecting the overall safety of the platform structure.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (4)

1. A base structure for an anti-blast shelter, comprising: a bottom part, four main frame beams (100) and a plurality of support members (200);

the bottom part comprises a flat plate (300) and a corrugated plate (400) arranged below the flat plate (300); the corrugated plate (400) comprises a plurality of groups of corrugated unit elements (410) which are sequentially connected, all the corrugated unit elements (410) are sequentially arranged along the width direction of the corrugated plate (400), each group of corrugated unit elements (410) comprises an upper chord plate (411), a lower chord plate (412) and two middle connecting plates (413), and the lower chord plates (412), one middle connecting plate (413), the upper chord plate (411) and the other middle connecting plate (413) are sequentially connected; the level of the upper chord plate (411) is higher than the level of the lower chord plate (412);

the four main frame beams (100) are respectively connected with the periphery of the corrugated plate (400), the main frame beams (100) are I-shaped steel, and the main frame beams (100) comprise main beam upper wing plates (110), main beam webs (120) and main beam lower wing plates (130) which are sequentially connected from top to bottom; the top surfaces of the main girder upper wing plates (110) of all the main frame girders (100) are connected with the bottom surface of the flat plate (300); along the width direction of the corrugated plate (400), the main girder webs (120) of the two main frame girders (100) which are sequentially arranged are respectively connected with the lower chord plates (412) at the two ends of the corrugated plate (400);

the lower chord plates (412) of the corrugated single elements (410) are provided with the supporting members (200), each supporting member (200) is installed on one lower chord plate (412), the supporting members (200) are channel steel, and each supporting member (200) comprises an upper plate body (210), a side plate (220) and a lower plate body (230) which are connected in sequence; the lower plate body (230) of each support member (200) is connected to the corresponding lower chord plate (412).

2. The base structure of the anti-knock shelter of claim 1, wherein: further comprising at least one intermediate auxiliary beam (500); the middle auxiliary beam (500) is I-steel, and the middle auxiliary beam (500) comprises an auxiliary beam upper wing plate (510), an auxiliary beam web plate (520) and an auxiliary beam lower wing plate (530) which are sequentially connected from top to bottom;

the auxiliary girder web (520) of each of the intermediate auxiliary girders (500) is connected to the lower chord plate (412) of one of the corrugated unit pieces (410), and the auxiliary girder upper wing plate (510) of each of the intermediate auxiliary girders (500) is connected to the bottom surface of the flat plate (300).

3. The base structure of the anti-knock shelter of claim 1, wherein: the connection part of the main frame beam (100) and the lower chord plate (412) is a main beam connection position, and the height of the main beam connection position is less than or equal to one half of the height of the main frame beam (100).

4. The base structure of the anti-knock shelter of claim 1, wherein: each main frame beam (100) is fixed on a connecting cushion block (600), and the connecting cushion blocks (600) are welded on the steel structure platform.