A movable type of deep foundation pit blasting protection cover

Abstract

This utility model relates to the field of protection technology for deep foundation pit blasting construction, and in particular to a movable protective cover plate for deep foundation pit blasting. It includes several columns, with a truss bolted between the columns. Movable wheels are installed at the bottom of each column, and a canopy mesh is movably overlapped at the top of the truss. The truss is hoisted using a hoisting wire rope. One side of each column is bolted to one end of a guy rope. The outer wall of each movable wheel is rolled to the inner wall of a track. The bottom of the track is welded to the top of a pre-embedded steel plate, and several ear plates are provided above the pre-embedded steel plate. This device allows for flexible adjustment of the protection range during deep foundation pit blasting construction, improving construction efficiency and ensuring construction safety. It has advantages such as flexible movement and easy assembly / disassembly, and can adapt to the blasting operation needs of different areas of deep foundation pits, suitable for different construction scenarios.

Description

Technical Field

[0001] This utility model relates to the field of protection technology for deep foundation pit blasting construction, specifically to a movable deep foundation pit blasting protection cover. Background Technology

[0002] During deep foundation pit blasting operations, the flying rocks and shock waves generated by the blasting pose a serious threat to the surrounding environment and the safety of construction personnel. Traditional protective covers are mostly fixed, which has problems such as fixed protection range, inflexible movement and adjustment, and inconvenience in disassembly and assembly. They are difficult to adapt to the blasting operation needs of different areas of deep foundation pits, and have low construction efficiency and significant safety hazards.

[0003] In the process of realizing this utility model, the inventors discovered the following problems with the existing technology: the traditional protective cover plates are inconvenient to disassemble and assemble and are not flexible to move during deep foundation pit operations. Therefore, a movable deep foundation pit blasting protective cover plate is provided to achieve flexible adjustment of the protection range, improve construction efficiency, and ensure construction safety. Utility Model Content

[0004] The purpose of this utility model is to provide a movable deep foundation pit blasting protection cover to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a walkable deep foundation pit blasting protection cover, comprising columns, characterized in that: the number of columns is several, a truss is installed between the multiple sets of columns by bolts, a movable wheel is installed at the bottom of the column, a canopy mesh is movably overlapped at the top of the truss, the truss is hoisted by a hoisting steel wire rope, and one side of the column is connected to one end of a guy rope by bolts;

[0006] The outer wall of the moving wheel is in rolling connection with the inner wall of the track. The bottom of the track is welded to the top of the embedded steel plate. Several ear plates are provided above the embedded steel plate. One end of the moving wheel is connected to the output shaft of the servo motor.

[0007] The truss includes an upper chord and a lower chord below the upper chord. The upper chord is bolted to the lower chord via purlins. One end of the upper chord is bolted to a rib. A top beam is intersecting below the rib. A vertical brace is below the top beam. A bottom beam is below the vertical brace.

[0008] The beneficial effects of this utility model are: it enables the columns and truss structures to move along a preset track, and the columns and truss structures are assembled and hoisted by two-point binding, making disassembly very convenient. The position of the protective cover plate can be adjusted to the next area as needed after the blasting is completed.

[0009] To achieve structural stability of the truss structure:

[0010] Further configuration: the upper and lower chords of the truss are both made of 80×80×3.0mm galvanized square tubing, the connecting truss is made of 60×60×2.0mm galvanized square tubing stair truss, and the columns are made of 150×150×3.0mm square tubing. The longitudinal spacing of the columns is 4.95m, the transverse spacing is 12m, and the front and rear columns are connected by bolts of 60×60×2.0mm square steel stair truss.

[0011] By adopting the above technical solution, the truss structure uses a galvanized square tube structure, which maintains stable load-bearing capacity while controlling the overall weight.

[0012] To achieve the protective capabilities and effective protection range of the protective structure:

[0013] Further configuration: The roof mesh is installed on the truss, symmetrically from the middle to both sides, and the non-standard section of flexible steel wire mesh with a density of 6m in length and 3m in width, and the steel structure color steel tile roof is 16m long.

[0014] By adopting the above technical solution, the protective structure can completely cover the entire column and truss structure.

[0015] To achieve orbital stability:

[0016] Further configuration: The track is made of three (or two) sets of L50×3.0 angle steel with a lateral spacing of 0.5m, and is welded to the pre-embedded steel plate with full weld at the joint.

[0017] By adopting the above technical solution, the track can accommodate the size of the rollers and can support the truss structure and the column as a whole without sinking.

[0018] To achieve overall stability of the column and truss structure:

[0019] Further configuration: the guy ropes are spaced 6m apart longitudinally, connected to the column at the top and the ear plate at the bottom, and the hoisting is carried out by two-point binding. The hoisting points are located at 1 / 3 of both ends of the beam member. The angle between the hoisting wire rope and the horizontal plane is 45°-60°. The wire rope is selected as 6×37+IWR, φ17.5mm, with a nominal tensile strength of 1670MPa.

[0020] By adopting the above technical solutions, the guy ropes can ensure the stability of the overall structure, and the hoisting can ensure structural stability.

[0021] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the cross-sectional arrangement of the column of this utility model;

[0023] Figure 2 This is a schematic diagram of the longitudinal section arrangement of the column of this utility model;

[0024] Figure 3 This is a schematic diagram of the purlin of this utility model;

[0025] Figure 4 This is a schematic diagram of the truss structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the pre-assembly of a single truss structure according to this utility model;

[0027] Figure 6 This is a schematic diagram of the truss structure installation of this utility model;

[0028] Figure 7 This is a schematic diagram of the column installation of this utility model;

[0029] Figure 8 This is a schematic diagram of the guy rope arrangement of this utility model;

[0030] Figure 9 This is a schematic diagram of the track installation of this utility model.

[0031] In the diagram: 1. Column; 2. Truss; 201. Truss upper chord; 202. Truss lower chord; 203. Purlin; 204. Rib; 205. Top beam; 206. Vertical brace; 207. Bottom beam; 3. Casters; 4. Roof mesh; 5. Hoisting wire rope; 6. Guy rope; 7. Track; 8. Embedded steel plate; 9. Ear plate; 10. Servo motor. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0033] Please see Figures 1 to 9 A movable deep foundation pit blasting protection cover includes columns 1, a number of columns 1, and trusses 2 are bolted between multiple sets of columns 1. The bottom of the columns 1 is equipped with movable wheels 3, and the top of the trusses 2 is movably connected with a canopy mesh 4. The trusses 2 are hoisted by hoisting steel wire ropes 5. One side of the column 1 is connected to one end of the guy rope 6 by bolts.

[0034] The outer wall of the movable wheel 3 is in rolling connection with the inner wall of the track 7. The bottom of the track 7 is welded to the top of the embedded steel plate 8. Several ear plates 9 are provided above the embedded steel plate 8. One end of the movable wheel 3 is connected to the output shaft of the servo motor 10.

[0035] The truss 2 includes an upper chord 201, a lower chord 202 below the upper chord 201, the upper chord 201 being bolted to the lower chord 202 via purlins 203, a rib 204 being bolted to one end of the upper chord 201, a top beam 205 being provided below the rib 204, a vertical brace 206 being provided below the top beam 205, and a bottom beam 207 being provided below the vertical brace 206.

[0036] In this embodiment, as Figure 3 As shown, both the upper chord 201 and the lower chord 202 of the truss are made of 80×80×3.0mm galvanized square tubing. The connecting truss is a 60×60×2.0mm galvanized square tubing stair truss, and the column 1 is made of 150×150×3.0mm square tubing. The longitudinal spacing of the column 1 is 4.95m, the transverse spacing is 12m, and the front and rear columns 1 are connected by bolts of 60×60×2.0mm square steel stair truss.

[0037] In this embodiment, as Figure 2 As shown, the roof mesh 4 is installed on the truss 2, symmetrically from the middle to both sides. The non-standard section of flexible steel wire mesh with a density of 6m in length and 3m in width is 16m long.

[0038] In this embodiment, as Figure 9 As shown, track 7 is made of three or two sets of L50×3.0 angle steel with a lateral spacing of 0.5m, and is welded to the pre-embedded steel plate 8. The joint is fully welded.

[0039] In this embodiment, as Figure 7 As shown, the guy ropes 6 have a longitudinal spacing of 6m, are connected to the column 1 at the top and the ear plate 9 at the bottom, and are hoisted by two-point binding. The hoisting points are located at 1 / 3 of both ends of the beam member. The hoisting wire rope 5 is at an angle of 45°-60° to the horizontal plane. The wire rope is 6×37+IWR, φ17.5mm, and has a nominal tensile strength of 1670MPa.

[0040] The working process of this movable deep foundation pit blasting protection cover is as follows:

[0041] First, the site is hardened. After leveling the original ground, a 0.5% cross slope is pre-set. 20cm thick C25 concrete is used for hardening. Control stakes are set at 5m intervals. After the formwork is installed, concrete is poured and compacted with a plate vibrator. During the initial setting, it is manually smoothed. Expansion joints are set at 10m lengths and filled with foam board. After reaching the required strength, the expansion joints are cut. Then, pre-embedded steel plates 8 are embedded, and rails 7 are welded on the pre-embedded steel plates 8. The rails 7 are made of three (or two) sets of L50×3.0 angle steel with a transverse spacing of 0.5m. Welding is performed at the joints. The welds are full and free of weld defects. E4303 type welding rods are used. Welding current, arc voltage, welding speed, etc. are performed according to the specifications based on the base material. The weld joints are cleaned before welding, and the appearance and dimensions of the welds are checked after welding. First- and second-level welds are subjected to ultrasonic or radiographic testing as required.

[0042] The columns 1 and truss 2 are then spliced ​​together. The longitudinal spacing of the columns 1 is 4.95m and the transverse spacing is 12m. The front and rear columns 1 are connected by 60×60×2.0mm square steel stair truss bolts. The upper chord 201 and lower chord 202 of the truss are connected by several purlins 203 to form a stable structure. The ribs 204, top beams 205, vertical braces 206 and bottom beams 207 make the multi-truss structure spliced ​​with the columns 1 into a whole. It moves on the track 7 by moving wheels 3. The moving wheels 3 are driven by servo motors 10 (model: HGKR43JK) and the braking function is achieved by the reverse rotation of servo motors 10 (model: HGKR43JK). After moving to the predetermined position, it is connected to the columns 1 at one end and the ear plates 9 on the pre-embedded steel plates 8 by multiple guy ropes 6, so that the overall structure maintains stability.

[0043] Select a tower crane or a 25-ton truck crane based on the weight of the components and the hoisting height. Use 6×37+IWR steel wire ropes with a diameter of 17.5mm and a nominal tensile strength of 1670MPa. Perform anti-overturning calculations to ensure stability before hoisting the truss 2 structure and the roof mesh 4. During hoisting, the angle between the hoisting steel wire rope 5 and the horizontal plane should be 45°-60°.

[0044] During dismantling, the process proceeds from high to low, removing the mesh panels, stair trusses, main beams, columns, etc., with clear work procedures and safety measures for each step.

[0045] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0046] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A walkable form of deep foundation pit blasting protection cover plate comprising a stand column (1), characterized in that: The number of columns (1) is several. A truss (2) is installed between the multiple sets of columns (1) by bolts. A moving wheel (3) is installed at the bottom of the column (1). A roof mesh (4) is movably overlapped at the top of the truss (2). The truss (2) is hoisted by hoisting wire rope (5). One side of the column (1) is connected to one end of the guy rope (6) by bolts. The outer wall of the moving wheel (3) is rolledly connected to the inner wall of the track (7). The bottom of the track (7) is welded to the top of the embedded steel plate (8). Several ear plates (9) are provided above the embedded steel plate (8). One end of the moving wheel (3) is connected to the output shaft of the servo motor (10). The truss (2) includes an upper chord (201), and a lower chord (202) is provided below the upper chord (201). The upper chord (201) is bolted to the lower chord (202) via purlins (203). One end of the upper chord (201) is bolted to a rib (204). A top beam (205) is provided below the rib (204). A vertical brace (206) is provided below the top beam (205). A bottom beam (207) is provided below the vertical brace (206).

2. A walkable form of deep excavation blast protection cover sheet as claimed in claim 1, characterised in that: The upper chord (201) and lower chord (202) of the truss are both made of 80×80×3.0mm galvanized square tubing. The connecting truss is made of 60×60×2.0mm galvanized square tubing stair truss. The columns (1) are made of 150×150×3.0mm square tubing. The longitudinal spacing of the columns (1) is 4.95m and the transverse spacing is 12m. The front and rear columns (1) are connected by bolts of 60×60×2.0mm square steel stair truss.

3. A walkable form of a deep foundation pit blasting protection cover plate according to claim 1, characterized in that: The roof mesh (4) is installed on the truss (2) and is installed symmetrically from the middle to both sides. The non-standard section of flexible steel wire mesh has a length of 6m and a width of 3m. The steel structure color steel tile roof is 16m long.

4. A walkable form of deep foundation pit blasting protection cover plate as claimed in claim 1, characterized in that: The track (7) is made of three or two sets of L50×3.0 angle steel with a horizontal spacing of 0.5m. It is welded to the pre-embedded steel plate (8) with full welding at the joint.

5. A walkable form of a deep foundation pit blasting protection cover plate according to claim 1, characterized in that: The guy ropes (6) are spaced 6m apart longitudinally, with the upper part connected to the column (1) and the lower part connected to the ear plate (9). The hoisting is carried out by two-point binding, with the hoisting points located at 1 / 3 of both ends of the beam member. The hoisting wire rope (5) is at an angle of 45°-60° to the horizontal plane. The wire rope is 6×37+IWR, φ17.5mm, with a nominal tensile strength of 1670MPa.

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