CN219993294U - Explosion construction protects existing structure and prevents flying stone device - Google Patents

Abstract

The utility model relates to a blast construction protection existing structure flyer prevention device, which comprises a protection steel plate, a support fixing piece and a buffer assembly, wherein the support fixing piece is arranged on the protection steel plate, the support fixing piece comprises a support frame and a plurality of inclined supporting rods which are parallel to each other, the protection steel plate is connected with the support frame through bolts, the protection steel plate is used for shielding a top plate, the inclined supporting rods are respectively fixedly connected with two opposite side edges of the support frame, the inclined supporting rods are obliquely arranged on the support frame, and the inclined supporting rods are simultaneously used for being connected with an enclosure structure through bolts; the buffer component is used for buffering the impact of flying stones and the protective steel plate. The utility model can reduce the possibility of threatening the flying stone to the structural safety of the foundation pit roof.

Description

Explosion construction protects existing structure and prevents flying stone device

Technical Field

The utility model relates to the field of foundation pit building technology, in particular to a device for protecting an existing structure from flying stones in blasting construction.

Background

Since a subway station is usually located in a busy section of an urban area, a cover-excavation method is generally used for excavation of a foundation pit when the subway station is constructed. The cover excavation method is used for excavating the foundation pit, so that the influence on the ground is small, and the ground traffic is blocked only in a short time, so that the influence on the urban road traffic is reduced. The top-down method is adopted to prevent the sinking of adjacent buildings caused by digging foundation pits and restore road traffic as soon as possible.

The top-down construction method is to excavate the underground diaphragm wall downwards to a certain depth from the ground, then the underground diaphragm wall can be used as an enclosure structure of the foundation pit, the middle part of the foundation pit is supported by a middle upright post of the main structure of the underground building, then the top plate is poured by using the unexcavated soil body as a soil mould, and the top plate is poured and fixed on the underground diaphragm wall at the same time, and can be used as a powerful transverse strut to prevent the underground diaphragm wall from deforming into the foundation pit, and the road is restored after backfilling on the top plate, so that the traffic is restored. And finally, excavating the foundation pit layer by layer from the top plate to the bottom of the foundation pit layer by layer, and constructing a main body structure layer by layer until the bottom of the foundation pit.

In the foundation pit excavation process, when excavating to the stratum, the loose bedrock needs to be blasted for excavation. The huge energy generated by explosion can be released in a short time, so that broken stone splashes, and broken stone violently impacts the roof which is an existing structure at the top of the foundation pit, so that the structural safety of the roof is threatened, the road structure on the roof is unstable, and the risk of unsafe driving exists on the urban roads.

Disclosure of Invention

In order to reduce the possibility of threatening the flying stone to the structural safety of the foundation pit roof, the utility model provides a device for protecting the existing structure from flying stone in blasting construction.

The utility model provides a blast construction protection existing structure flyrock prevention device, which adopts the following technical scheme:

the utility model provides a blasting construction protection existing structure prevents flying stone device, includes the protection steel sheet, sets up in the support mounting and the buffering subassembly of protection steel sheet, the support mounting includes support frame and a plurality of oblique vaulting pole that are parallel to each other, protection steel sheet bolted connection is in the support frame, the protection steel sheet is used for sheltering from the roof, a plurality of oblique vaulting pole respectively fixed connection in the opposite both sides border of support frame, a plurality of oblique vaulting pole is all set up in the slope of support frame, a plurality of oblique vaulting pole is used for bolted connection in envelope simultaneously; the buffer component is used for buffering the impact of flying stones and the protective steel plate.

Through adopting above-mentioned technical scheme, a plurality of diagonal braces make the support frame be fixed in the building envelope of foundation ditch steadily, and the support frame makes the protection steel sheet shelter from the foundation ditch roof steadily to splash to the route of foundation ditch roof to the flyash that produces because of the blasting blocks, in order to reduce flyash striking foundation ditch roof, and cause the possibility of threat to the structural safety of foundation ditch roof. The buffer assembly buffers the impact of the flyrock and the protection steel plate to reduce the impact force generated by the flyrock impacting the protection steel plate, so as to reduce the possibility that the impact force generated by the flyrock impacting the protection steel plate is overlarge and the connection stability of the support frame and the diagonal brace relative to the enclosure structure is affected, so that the protection steel plate can protect the flyrock more stably.

Optionally, the buffering subassembly includes the blotter and sets up in the mounting of blotter, the blotter covers in the protection steel sheet, the mounting is used for making the blotter detachable connection in the protection steel sheet.

By adopting the technical scheme, the buffer pad has certain elasticity, and can absorb part of impact energy generated when the flying stone impacts the protection steel plate so as to reduce impact force generated when the flying stone impacts the protection steel plate, so that the protection steel plate can protect the flying stone more stably; meanwhile, the buffer pad can reduce noise generated when flying stones strike the protective steel plate. The fixing piece enables the buffer cushion to be detachably connected to the protection steel plate, and the buffer cushion is convenient to replace after being damaged by multiple impacts.

Optionally, the mounting includes a plurality of fixing bolt, a plurality of screw has been seted up to the protection steel sheet, and a plurality of fixing bolt wears to locate the blotter, just fixing bolt inserts simultaneously and threaded connection in the protection steel sheet, the buffer pad is held between the spiral shell head of protection steel sheet and fixing bolt.

Through adopting above-mentioned technical scheme, the cushion is held between fixing base and fixing bolt's spiral shell head for the blotter is fixed in the protection steel sheet steadily. After the cushion pad is damaged, the fixing bolt is screwed out of the protective steel plate, so that the cushion pad is detached from the protective steel plate relatively to facilitate replacement.

Optionally, the blotter wears to establish and fixedly connected with fixed swivel nut, fixing bolt wears to establish and threaded connection in fixed swivel nut, fixing bolt's spiral shell head is contradicted in the sleeve mouth border of fixed swivel nut.

By adopting the technical scheme, the fixing bolt is penetrated and connected with the fixing screw sleeve in a threaded manner, so that the possibility that the thread of the fixing bolt damages the cushion pad in the penetrating and rotating process of the fixing bolt relative to the cushion pad is reduced; meanwhile, the fixing screw sleeve is made of a rigid material, compared with the screw head of the fixing bolt which is abutted against the buffer pad, the screw head of the fixing bolt is abutted against the edge of the sleeve opening of the fixing screw sleeve, so that the buffer pad and the protection steel plate are connected more stably.

Optionally, the blotter includes a plurality of buffering and divides the pad, a plurality of buffering divides the pad amalgamation each other, and a plurality of buffering divides the pad all to dismantle through the mounting and connect in the protection steel sheet.

Through adopting above-mentioned technical scheme, after the blotter part received the damage, only need to divide the buffering of this department to fill up and change to promote the convenience of changing the blotter, and can reduce the cost of changing the blotter. In order to protect a newly built main structure of a building, the support frame, the protection steel plate and the buffer pad are required to be detached from the enclosure structure on the upper part of the main structure, the main structure is moved to the next layer for reinstallation, the buffer pad is split into a plurality of buffer sub-pads, so that the buffer pad is conveniently transferred, and the construction difficulty is reduced.

Optionally, the protection steel sheet includes a plurality of minute steel sheet, and a plurality of divide the steel sheet amalgamation each other, and a plurality of divide the steel sheet all bolted connection in the support frame.

Through adopting above-mentioned technical scheme, for protecting newly-built building major structure, need dismantle support frame, protection steel sheet and buffer pad relative upper portion's envelope to remove to next floor reinstallation, split into a plurality of steel plates that divide with the protection steel sheet, so that shift the protection steel sheet, reduce the construction degree of difficulty.

Optionally, the support frame includes a plurality of support sub-frames, and a plurality of support sub-frames are mutually arranged and are pieced together, and adjacent two support sub-frames are mutually bolted connection, a plurality of diagonal brace corresponds fixed connection respectively in a plurality of support sub-frames, a plurality of the arrangement direction of support sub-frames is perpendicular to diagonal brace.

Through adopting above-mentioned technical scheme, for protecting newly-built building major structure, need dismantle support frame, protection steel sheet and buffer pad relative upper portion's envelope to remove to next floor reinstallation, split into a plurality of supports with the support frame and divide the frame, so that shift the support and divide the frame, reduce the construction degree of difficulty.

Optionally, the cushion pad is fixedly connected with an acoustic panel, and the acoustic panel is located between the cushion pad and the protection steel plate.

Through adopting above-mentioned technical scheme, the acoustic panel can effectively reduce the degree that noise that foundation ditch blasting produced was transmitted to the external world to reduce the noise that foundation ditch construction produced and lead to the fact the possibility of influence to urban environment.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. the protection steel plate stably shields the foundation pit roof so as to block the path of flying rocks generated by blasting to the foundation pit roof, so that the possibility that the flying rocks strike the foundation pit roof to threaten the structural safety of the foundation pit roof is reduced;

2. the buffer assembly buffers the impact between the flying stone and the protection steel plate so as to reduce the possibility that the impact force generated by the impact of the flying stone on the protection steel plate is too large and influences the connection stability of the support frame and the diagonal brace relative to the enclosure structure, so that the protection steel plate can protect the flying stone more stably;

3. the sound absorbing plate can effectively reduce the degree of noise transmission to the external world that the foundation ditch blasting produced to reduce the noise that the foundation ditch construction produced and lead to the fact the possibility that influences to urban environment.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

FIG. 2 is a schematic cross-sectional view of the structure of line A-A in FIG. 1.

Fig. 3 is a schematic cross-sectional view of the line B-B in fig. 1.

FIG. 4 is an enlarged schematic view of the portion C in FIG. 3

Reference numerals: 1. a protective steel plate; 11. dividing steel plates; 2. a support fixing member; 21. a support frame; 211. a support sub-frame; 22. a diagonal brace; 3. a buffer assembly; 31. a cushion pad; 311. buffering and separating the pad; 32. a fixing member; 321. a fixing bolt; 4. fixing the screw sleeve; 5. a sound absorbing panel; 51. a sound-absorbing sub-board; 6. a connecting plate; 7. and a fixing plate.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-4.

The embodiment of the utility model discloses a device for protecting an existing structure from flying stones in blasting construction. Referring to fig. 1, the blast construction protection existing structure flyer prevention device comprises a protection steel plate 1, a support fixing piece 2 and a buffer component 3, wherein the support fixing piece 2 comprises a support frame 21 and a plurality of diagonal braces 22, the diagonal braces 22 are mutually parallel, the diagonal braces 22 are obliquely arranged on the support frame 21, one ends of the diagonal braces 22 are respectively and fixedly connected with two opposite side edges of the support frame 21, and the other ends of the diagonal braces 22 are simultaneously used for being connected with an enclosure structure of a foundation pit through bolts, so that the diagonal braces 22 can be detachably connected with the enclosure structure of the foundation pit.

Referring to fig. 1 and 2, the supporting frame 21 is in a grid shape, the outline of the outer side edge of the grid of the supporting frame 21 is rectangular, the inner walls at four corners of the grid of the supporting frame 21 are respectively fixedly connected with the connecting plates 6, and the protection steel plates 1 are simultaneously connected with the plurality of connecting plates 6 by bolts, so that the protection steel plates 1 are firmly connected with the supporting frame 21, and meanwhile, the protection steel plates 1 are detachably connected with the supporting frame 21. The cushion assembly 3 includes a cushion pad 31 and a fixing member 32, the cushion pad 31 is covered on the shield steel plate 1, and the fixing member 32 is used to detachably connect the cushion pad 31 to the shield steel plate 1. The screw head of the bolt penetrating through the protective steel plate 1 is embedded in the protective steel plate 1, so that the buffer pad 31 is attached and fixed on the protective steel plate 1.

The support frame 21 is stably fixed to the enclosure structure of the foundation pit through the inclined support rods 22, the support frame 21 enables the protection steel plate 1 to stably shield the top plate of the foundation pit, so that the path of flying stones generated by blasting splashed to the top plate of the foundation pit is blocked, the possibility that flying stones strike the top plate of the foundation pit and threaten the structural safety of the top plate of the foundation pit is reduced.

The cushion pad 31 has a certain elasticity, and can absorb a part of impact energy generated when the flying stone impacts the protection steel plate 1, so as to reduce impact force generated when the flying stone impacts the protection steel plate 1, reduce possibility that the impact force generated when the flying stone impacts the protection steel plate 1 is overlarge, and influence the connection stability of the support frame 21 and the diagonal brace 22 relative to the enclosure structure, so that the protection steel plate 1 can protect the flying stone more stably; meanwhile, the buffer cushion 31 can reduce noise generated when flying stones strike the protective steel plate 1, and reduce the possibility that noise generated by foundation pit construction affects urban environment.

Referring to fig. 3 and 4, the protection steel plate 1 is provided with a plurality of screw holes, and a plurality of screw hole arrays are respectively arranged on the protection steel plate 1. The fixing member 32 includes a plurality of fixing bolts 321, the plurality of fixing bolts 321 penetrate through the cushion pad 31, and the fixing bolts 321 are simultaneously inserted and screwed into the protection steel plate 1, and the cushion pad 31 is clamped between the protection steel plate 1 and screw heads of the fixing bolts 321. The cushion pad 31 is penetrated and fixedly connected with the fixing screw sleeve 4, the fixing bolt 321 is penetrated and connected with the fixing screw sleeve 4 in a threaded manner, and the screw head of the fixing bolt 321 is abutted against the edge of the sleeve opening of the fixing screw sleeve 4.

The cushion pad 31 is clamped between the fixing base and the screw head of the fixing bolt 321, so that the cushion pad 31 is stably fixed to the shield steel plate 1. After the cushion pad 31 is damaged, the fixing bolts 321 are screwed out of the protective steel plate 1 so as to detach the cushion pad 31 relative to the protective steel plate 1, and after the cushion pad 31 is damaged by multiple impacts, the cushion pad 31 is convenient to replace.

The fixing bolt 321 is penetrated and connected with the fixing screw sleeve 4 in a threaded manner, so that the possibility that the thread of the fixing bolt 321 damages the cushion pad 31 in the process of penetrating and rotating the fixing bolt 321 relative to the cushion pad 31 is reduced; meanwhile, since the fixing screw sleeve 4 is made of a rigid material, compared with the screw head of the fixing bolt 321 which is abutted against the buffer pad 31, the screw head of the fixing bolt 321 is abutted against the edge of the sleeve opening of the fixing screw sleeve 4, so that the connection between the buffer pad 31 and the protection steel plate 1 is more stable.

Referring to fig. 2 and 3, in order to further reduce noise transferred to urban areas from the foundation pit construction, a sound absorbing plate 5 is fixedly connected to one side of the cushion pad 31 facing the protection steel plate 1, and the sound absorbing plate 5 is located between the cushion pad 31 and the protection steel plate 1. The acoustic panel 5 can effectively reduce the degree of noise transmission to the external world that the foundation ditch blasting produced to reduce the possibility that noise that foundation ditch construction produced caused the influence to urban environment.

After the roof is poured, excavating a foundation pit layer by layer from the roof to the bottom of the foundation pit layer by layer, and constructing a main body structure layer by layer until the bottom of the foundation pit. When a main structure of a building is built, and foundation pits are continuously blasted downwards to excavate, broken stones generated by blasting can impact the main structure of the newly built building. In order to protect the newly built main structure of the building, it is necessary to disassemble the supporting frame 21, the protection steel plate 1 and the buffer pad 31 with respect to the upper enclosure structure and move to the next layer of the main structure to reinstall, so as to protect the newly built main structure of the building against flying stones.

Referring to fig. 1 and 2, in order to facilitate the transfer of the supporting frame 21, the protection steel plate 1 and the buffer pad 31, the supporting frame 21 includes a plurality of supporting sub-frames 211, the plurality of supporting sub-frames 211 are mutually aligned and spliced, the plurality of supporting sub-frames 211 are respectively fixedly connected with the fixing plates 7, and the fixing plates 7 of two adjacent supporting sub-frames 211 are mutually connected by bolts. The inclined strut 22 is fixedly connected to the supporting sub-frames 211, and the arrangement direction of the supporting sub-frames 211 is perpendicular to the axis of the inclined strut 22.

Referring to fig. 1 and 2, the protection steel plate 1 includes a plurality of sub-steel plates 11, the plurality of sub-steel plates 11 are spliced with each other, the plurality of sub-steel plates 11 are distributed on the supporting frame 21 in an array, and the plurality of sub-steel plates 11 are respectively connected to the plurality of supporting sub-frames 211 by corresponding bolts.

Referring to fig. 1 and 2, the cushion pad 31 includes a plurality of cushion sub-pads 311, the cushion sub-pads 311 are mutually spliced, the cushion sub-pads 311 are distributed on the protection steel plate 1 in an array, the fixing bolts 321 are correspondingly arranged on the cushion sub-pads 311, and the cushion sub-pads 311 are correspondingly connected to the steel sub-plates 11. The sound absorbing plate 5 also comprises a plurality of sound absorbing sub-plates 51, the number of the sound absorbing sub-plates 51 is corresponding to the number of the buffer sub-pads 311, and the plurality of sound absorbing sub-plates 51 are respectively and fixedly connected to the plurality of buffer sub-pads 311.

The support frame 21, the protection steel plate 1 and the buffer pad 31 are detached from the enclosure structure on the upper portion of the support frame 21, the support frame 21 is detached into a plurality of support sub-frames 211, meanwhile, the protection steel plate 1 can be detached into a plurality of sub-steel plates 11, and the buffer pad 31 is detached into a plurality of buffer sub-pads 311, so that the support frame 21, the protection steel plate 1 and the buffer pad 31 are conveniently transferred, and the construction difficulty is reduced.

And, when the cushion pad 31 is partially damaged, only the damaged cushion sub-pad 311 is required to be replaced, so that the convenience of replacing the cushion pad 31 is improved, and the cost of replacing the cushion pad 31 can be reduced.

The implementation principle of the explosion construction protection existing structure flyrock prevention device provided by the embodiment of the utility model is as follows: the support frame 21 is stably fixed to the enclosure structure of the foundation pit through the inclined support rods 22, the support frame 21 enables the protection steel plate 1 to stably shield the top plate of the foundation pit, so that the path of flying stones generated by blasting splashed to the top plate of the foundation pit is blocked, the possibility that flying stones strike the top plate of the foundation pit and threaten the structural safety of the top plate of the foundation pit is reduced. The cushion pad 31 has a certain elasticity, and can absorb a part of impact energy generated when the flying stone collides with the protection steel plate 1, so as to reduce impact force generated when the flying stone collides with the protection steel plate 1, and enable the protection steel plate 1 to protect the flying stone more stably.

When the foundation pit is excavated by continuing to blast downwards after the main structure of the upper layer of building is built, the support frame 21, the protection steel plate 1 and the buffer pad 31 are detached relative to the upper part of the enclosure structure, the support frame 21 is detached into a plurality of support sub-frames 211, meanwhile, the protection steel plate 1 is detached into a plurality of sub-steel plates 11, and the buffer pad 31 is detached into a plurality of buffer sub-pads 311, so that the support frame 21, the protection steel plate 1 and the buffer pad 31 are transferred to the next layer of the main structure of the building, and the main structure of the new building is protected from flying rocks.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (8)

1. The utility model provides a present structure of blasting construction protection prevents flying stone device which characterized in that: the anti-collision device comprises a protection steel plate (1), a support fixing piece (2) and a buffer component (3), wherein the support fixing piece (2) is arranged on the protection steel plate (1), the support fixing piece (2) comprises a support frame (21) and a plurality of inclined supporting rods (22) which are parallel to each other, the protection steel plate (1) is connected with the support frame (21) through bolts, the protection steel plate (1) is used for shielding a top plate, the inclined supporting rods (22) are respectively and fixedly connected with two opposite side edges of the support frame (21), the inclined supporting rods (22) are obliquely arranged on the support frame (21), and the inclined supporting rods (22) are simultaneously used for being connected with an enclosure structure through bolts; the buffer component (3) is used for buffering the impact of the flying stone and the protection steel plate (1).

2. The blast construction protecting existing structure stone fly-away preventing device according to claim 1, wherein: the buffer assembly (3) comprises a buffer pad (31) and a fixing piece (32) arranged on the buffer pad (31), the buffer pad (31) is covered on the protection steel plate (1), and the fixing piece (32) is used for enabling the buffer pad (31) to be detachably connected with the protection steel plate (1).

3. The blast construction protecting existing structure stone fly-away preventing device according to claim 2, wherein: the fixing piece (32) comprises a plurality of fixing bolts (321), a plurality of screw holes are formed in the protection steel plate (1), the fixing bolts (321) penetrate through the buffer pad (31), the fixing bolts (321) are simultaneously inserted and connected with the protection steel plate (1) in a threaded mode, and the buffer pad (31) is clamped between the protection steel plate (1) and screw heads of the fixing bolts (321).

4. A blast construction protecting existing structure from flying rocks apparatus according to claim 3, wherein: the cushion pad (31) is penetrated and fixedly connected with the fixed screw sleeve (4), the fixed bolt (321) is penetrated and connected with the fixed screw sleeve (4) in a threaded manner, and the screw head of the fixed bolt (321) is abutted to the edge of the sleeve opening of the fixed screw sleeve (4).

5. The blast construction protecting existing structure stone fly-away preventing device according to claim 2, wherein: the buffer pad (31) comprises a plurality of buffer sub-pads (311), a plurality of buffer sub-pads (311) are mutually spliced, and a plurality of buffer sub-pads (311) are detachably connected to the protection steel plate (1) through fixing pieces (32).

6. The blast construction protecting existing structure stone fly-away preventing device according to claim 1, wherein: the protection steel plate (1) comprises a plurality of sub-steel plates (11), the sub-steel plates (11) are mutually spliced, and the sub-steel plates (11) are connected with the supporting frame (21) through bolts.

7. The blast construction protecting existing structure stone fly-away preventing device according to claim 1, wherein: the support frame (21) comprises a plurality of support sub-frames (211), a plurality of support sub-frames (211) are mutually arranged and spliced, two adjacent support sub-frames (211) are mutually connected through bolts, a plurality of diagonal bracing rods (22) are respectively and correspondingly fixedly connected to the support sub-frames (211), and the arrangement direction of the support sub-frames (211) is perpendicular to the diagonal bracing rods (22).

8. The blast construction protecting existing structure stone fly-away preventing device according to claim 2, wherein: the sound absorbing plate (5) is fixedly connected to the cushion pad (31), and the sound absorbing plate (5) is located between the cushion pad (31) and the protection steel plate (1).