A fixed door slot for concrete pouring of large steel ladle reinforced concrete protection door

Abstract

A fixed door slot for concrete pouring of a large steel ladle reinforced concrete protective door, the fixed door slot is composed of a side wall, a bottom plate, a pre-embedded fixed support, an anti-collision safety guardrail, an adjustable reinforcement bolt support, and an adjustable support base; the height of the fixed door slot is higher than the height of the steel ladle reinforced concrete protective door to be processed, an anti-collision safety guardrail is arranged around the top of the side wall of the fixed door slot, the pre-embedded fixed support is embedded in the side wall concrete, the adjustable reinforcement bolt support is connected to the pre-embedded fixed support, the adjustable support base is arranged on the bottom plate, and the side wall and the bottom plate together form a box-type structure. The use of this special fixed door slot ensures that the steel ladle reinforced concrete protective door is in a horizontal and vertical state during the concrete pouring process, and ensures that the steel door panel of the steel ladle reinforced concrete protective door is not deformed during the entire concrete pouring process, and at the same time, placing the steel ladle reinforced concrete protective door in the fixed door slot reduces the construction space height of the steel ladle reinforced concrete protective door.

Description

Technical field:

[0001] The present invention is mainly applied to the technical field of protective engineering, and is particularly suitable for the construction of filling concrete inside the door cavity of a large steel-clad reinforced concrete protective door. Background technology:

[0002] With the continuous development of my country's national defense, national defense projects are becoming increasingly important. At present, there are four common forms of large protective doors in the field of protective engineering in my country: a. Steel-clad steel tube concrete structure; b. Steel-clad reinforced concrete structure; c. Beam-slab structure; d. Box-type steel plate + reinforced concrete combination structure. Among them, the steel-clad reinforced concrete structure has been widely used in recent years.

[0003] After the traditional steel ladle reinforced concrete protective door is welded in the factory, it is usually poured in a horizontal manner, and the concrete is transported to the door panel cavity by a concrete pump truck. The biggest disadvantages of this method are: 1. The door panel is difficult to level when it is laid flat, and a cavity sandwich is easily formed between the concrete surface and the steel door panel at the final stage of concrete pouring, resulting in a loose combination of the steel plate and concrete, which ultimately affects the overall force of the steel ladle reinforced concrete protective door; 2. Because the slump of pumped concrete is large, generally reaching 160mm to 200mm, if the protective door is not placed horizontally during horizontal concrete pouring, it is easy to cause local deformation of the steel door panel, thereby affecting the overall appearance quality of the steel ladle reinforced concrete protective door, and at the same time creating hidden dangers for the subsequent opening and closing operation of the protective door. Summary of the invention:

[0004] The present invention aims to provide a fixed door groove for concrete pouring of a steel ladle reinforced concrete protection door, which can eliminate the quality problems of cavity interlayer and door panel deformation generated when the protection door is poured horizontally.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] The present invention provides a fixed door groove for pouring concrete of a large steel ladle reinforced concrete protection door. As a fixed container for the steel ladle reinforced concrete protection door, the fixed door groove is arranged below the ground and consists of a side wall, a bottom plate, a pre-buried fixed fulcrum, an anti-collision safety guardrail, an adjustable reinforcement bolt support, and an adjustable support base; the height of the fixed door groove is higher than the height of the steel ladle reinforced concrete protection door to be processed, an anti-collision safety guardrail is arranged around the top of the side wall of the fixed door groove, the pre-buried fixed fulcrum is buried in the side wall concrete, the adjustable reinforcement bolt support is connected to the pre-buried fixed fulcrum, the adjustable support base is arranged on the bottom plate, and the side wall and the bottom plate together form a box-type structure.

[0007] The fixed door groove has sufficient width and length. When the steel ladle reinforced concrete protection door is placed in the fixed door groove, a working surface with a width of 1.2 meters is ensured around the steel ladle reinforced concrete protection door.

[0008] The anti-collision safety pier is 30cm high.

[0009] The embedded fixed support point adopts a national standard steel pipe with a diameter of 480mm and a wall thickness of 10mm.

[0010] The embedded fixed support point is embedded in the side wall concrete to a depth of 30 cm.

[0011] The embedded fixed support point is embedded in the concrete end and welded with a steel plate, the size of the steel plate is 150×150 cm.

[0012] The pre-buried fixed fulcrums are arranged in a plum blossom shape on the side wall in the length direction and are regularly arranged on the side wall in the width direction, with two pre-buried fixed fulcrums buried in each row.

[0013] The vertical spacing of the embedded fixed support points should be the same as the lengthwise spacing.

[0014] The adjustable supporting base is composed of a steel plate and adjustable bolts.

[0015] The side wall and bottom plate of the fixed door slot are made of reinforced concrete with a thickness of 50 cm.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention adopts a special fixed door groove as a fixed container for the steel ladle reinforced concrete protection door, and transfers the concrete filling of the conventional steel ladle reinforced concrete protection door from the ground to below the ground, thereby reducing the construction height and the construction difficulty.

[0018] 2. The present invention adopts adjustable reinforcement bolt support for reinforcement, which is more reliable and scientific than the traditional reinforcement method.

[0019] 3. The adjustable reinforcing bolt support of the present invention and the reinforcing bolts on the adjustable support base are adjustable bolts, which can ensure that the steel ladle reinforced concrete protection door is in a horizontal and vertical state during the pouring process, and prevent the concrete pouring quality from being affected by the uneven steel ladle reinforced concrete protection door during the pouring process.

[0020] 4. By adopting the present invention, the steel ladle reinforced concrete protective door stands upright, which reduces the area of ​​concrete entering the warehouse and can ensure that the concrete can be evenly stressed during the pouring process, avoiding quality problems such as drying and cold joints when the concrete is spread over a large area.

[0021] 5. The present invention can be used for factory-scale mass production and prefabrication of steel ladle reinforced concrete protective doors.

[0022] In summary, the present invention provides a special container suitable for the construction of concrete filling inside the door cavity of a large steel ladle reinforced concrete flat plate protective door. The special fixed door groove is used to ensure that the steel ladle reinforced concrete protective door is in a horizontal and vertical state during the concrete pouring process. At the same time, the steel ladle reinforced concrete protective door is placed in the fixed door groove to reduce the construction space height of the steel ladle reinforced concrete protective door. Therefore, the present invention uses a special fixed door groove to reinforce the steel ladle reinforced concrete protective door to ensure that the steel door plate of the steel ladle reinforced concrete protective door is not deformed during the entire concrete pouring process. Description of the drawings:

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the reinforced steel ladle reinforced concrete protection door of the present invention;

[0025] Figure 3 The present invention is used to cast concrete for a steel ladle reinforced concrete protective door.

[0026] Reference numerals in the figures:

[0027] 1- anti-collision safety guardrail, 2- embedded fixed fulcrum, 3- fixed door slot, 4- adjustable reinforcement bolt support, 5- attached flat plate vibrator, 6- steel ladle reinforced concrete protection door, 7- chute, 8- adjustable support base, 9- reserved chute hole, 10- receiving hopper, 11- top surface of the first layer of concrete. Specific implementation method:

[0028] The present invention will be further described below in conjunction with specific embodiments. Figure 1-Figure 3The present invention provides a fixed gate slot for pouring concrete of a large steel ladle reinforced concrete protection door. As a fixed container of the steel ladle reinforced concrete protection door, it is set below the ground. The fixed gate slot 3 is composed of a side wall, a bottom plate, a pre-embedded fixed support 2, an anti-collision safety guard pier 1, an adjustable reinforcement bolt support 4, and an adjustable support base 8. The bottom bearing capacity of the fixed gate slot 3 should meet the requirement of bearing the overall weight of the steel ladle reinforced concrete. The fixed gate slot 3 has sufficient width and length to meet the needs of the operator to work vertically up and down. When the steel ladle reinforced concrete protection door 6 is placed in the fixed gate slot 3, a working surface with a width of 1.2 meters should be ensured around the steel ladle reinforced concrete protection door 6. The height of the fixed gate slot 3 is higher than the height of the steel ladle reinforced concrete protection door 6 to be processed, so that the tank truck can be unloaded in place during concrete pouring. An anti-collision safety guard pier 1 is set around the top of the side wall of the fixed gate slot 3. The main purpose is to ensure the safety of the tank truck reversing and prevent objects on the ground from falling into the fixed gate slot 3 to cause personal injury. The height of the anti-collision safety guard pier 1 is preferably 30 cm. The embedded fixed support 2 can be made of a national standard steel pipe with a nominal diameter of 480mm and a wall thickness of 10mm. The depth of the embedded fixed support 2 in the side wall concrete is 30cm. The embedded concrete end should be welded with a steel plate, and the size of the steel plate should be 150×150cm. The embedded fixed support 2 is arranged in a plum blossom shape on the side wall in the length direction and regularly arranged on the side wall in the width direction. Two embedded fixed support points 2 are embedded in each row, and the vertical spacing is the same as the length spacing. The adjustable reinforcement bolt support 4 is connected to the embedded fixed support 2. The adjustable support base 8 is set on the bottom plate and is composed of a steel plate and adjustable bolts. It is mainly used to adjust the horizontality of the steel ladle reinforced concrete protection door 6. At the same time, it can be appropriately raised or lowered according to the size of the steel ladle reinforced concrete protection door 6 to meet the concrete pouring requirements. The thickness of the side walls and bottom plate of the fixed door groove 3 should be 50 cm. It is made of reinforced concrete. The side walls and the bottom plate together constitute a box-type structure, which is mainly used to place the steel ladle reinforced concrete protection door 6 to be poured, providing a reliable temperature reinforcement measure for the concrete pouring of the steel ladle reinforced concrete protection door 6, and at the same time meeting the requirements of concrete self-unloading.

[0029] When the invention is used to cast concrete for a large steel-clad reinforced concrete protective door, the following construction steps are included:

[0030] 1. Transportation and positioning of the steel ladle reinforced concrete protection door 6: During the on-site construction process, the processed hollow steel ladle reinforced concrete protection door 6 is first transported to the fixed door groove 3; after being hoisted into place, it is first stabilized and the adjustable reinforcement bolts 4 on the sides and ends are quickly applied for reinforcement. After the reinforcement of the sides and ends is completed and it is determined that the steel ladle reinforced concrete protection door 6 is stable, the crane can be removed.

[0031] 2. Precise positioning and reinforcement of the steel ladle reinforced concrete protection door 6: After the initial stabilization is completed, use a measuring instrument to perform precise positioning measurement. After the measurement is completed, positioning reinforcement is performed. The height and horizontality of the steel ladle reinforced concrete protection door 6 are adjusted by adjusting the adjustable bolts on the adjustable support base 8 at the bottom of the fixed door groove 3, and the verticality of the steel ladle reinforced concrete protection door 6 is adjusted by adjusting the adjustable bolts on the adjustable reinforcement bolt support 4 on the side and end.

[0032] 3. Install the attached flat plate vibrator 5: After the overall reinforcement of the steel ladle reinforced concrete protection door 6 is completed, install the attached flat plate vibrator 5. The attached flat plate vibrator 5 adopts the ZW-10 attached concrete vibrator with a vibration frequency of 2840r.PM, an exciting force of 980kgf, a rated voltage of 380V, a motor power of 2.2kW, and an effective radius of 2.0m. The specific arrangement quantity is calculated and determined according to the size of the steel ladle reinforced concrete protection door 6. During on-site operation, it is finally ensured that the vibration radius of the attached flat plate vibrator 5 overlaps by 50cm to achieve full coverage vibration without blind spots.

[0033] 4. Install the pouring chute 7 and the receiving hopper 10: After the attached flat vibrator 5 is installed, install the pouring chute 7 and the receiving hopper 10. The receiving hopper 10 and the chute 7 must be connected. The receiving hopper 10 is trumpet-shaped, and the chute 7 is round. The chute 7 can be a hose chute, which mainly passes through and avoids the steel bars in the steel ladle reinforced concrete protection door 6. The diameter of the chute 7 is determined according to the spacing between the steel bars in the steel ladle reinforced concrete protection door 6; the distance between the bottom of the chute 7 and the bottom plate of the steel ladle reinforced concrete protection door 6 is not more than 30CM. The number of chutes 7 is determined according to the length of the steel ladle reinforced concrete protection door 6, but the horizontal spacing shall not be greater than 2 meters. The chute 7 is inserted into the steel ladle reinforced concrete protection door 6 through the reserved chute hole 9 at the upper end of the steel ladle reinforced concrete protection door 6. The chute 7 should be connected by a small section of 1 meter in length. During the concrete pouring process, as the concrete rises, the chute 7 is gradually raised from the steel ladle reinforced concrete protection door 6 and the chute 7 is removed in sections in time to prevent the chute 7 from being buried too deep and unable to be taken out.

[0034] 5. Concrete pouring construction: Concrete is transported by concrete mixer truck to the hopper 10 at the upper edge of the fixed gate slot 3, and is put into the warehouse by self-unloading. Each unloading ensures that the inflow of each chute 7 is the same, so that the rising height of the concrete in the fixed gate slot 3 is maintained at the same level; the attached flat vibrator 5 should be turned on before the concrete is put into the warehouse. The pouring speed of concrete into the warehouse should take into account the lateral pressure of the concrete at the bottom of the steel ladle reinforced concrete protection door 6 and the combined force of the outer adjustable reinforcement bolt support 4, to ensure that the outer adjustable reinforcement bolt support 4 can meet the lateral pressure generated by the concrete on the steel plate of the steel ladle reinforced concrete protection door 6 during the pouring and rising process, and the steel plate shall not be deformed.

[0035] Casting construction includes concrete performance configuration, steel-clad reinforced concrete protection door 6 concrete construction and concrete construction control:

[0036] 1) Concrete performance configuration, using the following proportions and standards of concrete:

[0037]

[0038] 2) Concrete construction of steel-clad reinforced concrete protective door 6: The vertical direction is a regular rectangle, and the concrete is poured layer by layer from the bottom to the top.

[0039] In the first step, concrete is unloaded from the chute 7 into the bottom of the steel ladle reinforced concrete protection door 6. During the unloading process, it is ensured that the height each time does not exceed 50 cm, and the rise in the height direction is evenly distributed.

[0040] In the second step, when laying the second layer of concrete on the top surface 11 of the first layer of concrete, it should be ensured that the bubbles in the first layer of concrete are completely eliminated. Concrete shall not be laid when bubbles are continuously eliminated. The thickness of the second layer of concrete is guaranteed to be less than 50 cm. The unloading method is the same as the laying method of the first layer of concrete. During the pouring, the steel plate deformation of the steel ladle reinforced concrete protection door 6 is observed at any time. If deformation exceeding the allowable deformation of the specification is found, the concrete pouring should be suspended. The concrete pouring can be continued after the concrete is stable for a period of time. If water seepage is found during the pouring process, a straw should be used to promptly remove the water in the bin to prevent the concrete from segregating and other quality problems due to water seepage.

[0041] The third step is to repeat the process by analogy. As the number of layers increases, the concrete continues to increase, and finally the pouring of the entire warehouse of concrete is completed.

[0042] 3) Concrete construction control: In this embodiment, C60 self-compacting concrete is used as an example, and the expansion degree of concrete is preferably controlled within 660-755mm.

[0043] 6. Set up measurement observation points on both sides of the steel ladle reinforced concrete protection door 6, and observe the deformation of the steel plate of the steel ladle reinforced concrete protection door 6 at any time during the pouring process. If the deformation exceeds 1mm, immediately slow down the pouring speed, and continue pouring the upper concrete after the lower layer is close to initial setting and has a certain bearing capacity.

[0044] 7. In the final stage of concrete pouring, the concrete height is flush with the reserved chute hole 9 on the top of the ladle reinforced concrete protection door 6. After the concrete is finally set, the cast ladle reinforced concrete protection door 6 can be lifted out of the fixed door groove 3, that is, the production of the ladle reinforced concrete protection door is completed, and then the construction of the next ladle reinforced concrete protection door 6 can be carried out; in the later stage, the concrete at the reserved chute hole 9 on the ladle reinforced concrete protection door 6 is manually chiseled and sealed with a small steel plate.

Claims

1. A fixed door slot for concrete pouring of a large steel ladle reinforced concrete protection door, as a fixed container for the steel ladle reinforced concrete protection door, characterized by: The fixed door slot (3) is arranged below the ground and is composed of a side wall, a bottom plate, a pre-buried fixed support point (2), an anti-collision safety guard pier (1), an adjustable reinforcement bolt support (4), and an adjustable support base (8); the height of the fixed door slot (3) is higher than the height of the steel-clad reinforced concrete protective door (6) to be processed, an anti-collision safety guard pier (1) is arranged around the top of the side wall of the fixed door slot (3), the pre-buried fixed support point (2) is buried in the side wall concrete, the adjustable reinforcement bolt support (4) is connected to the pre-buried fixed support point (2), the adjustable support base (8) is arranged on the bottom plate, and the side wall and the bottom plate together form a box-type structure.

2. According to claim 1, a large steel ladle reinforced concrete protection door concrete pouring fixed door groove, characterized in that: The fixed door groove (3) has sufficient width and length. When the steel ladle reinforced concrete protection door (6) is placed in the fixed door groove (3), a working surface with a width of 1.2 meters is ensured around the steel ladle reinforced concrete protection door (6).

3. According to claim 1, a large steel ladle reinforced concrete protection door concrete pouring fixed door groove, characterized in that: The anti-collision safety pier (1) has a height of 30 cm.

4. According to claim 1, a large steel ladle reinforced concrete protection door concrete pouring fixed door groove, characterized in that: The embedded fixed support point (2) is made of a national standard steel pipe with a diameter of 480 mm and a wall thickness of 10 mm.

5. According to claim 1, a large steel ladle reinforced concrete protection door concrete pouring fixed door groove, characterized in that: The pre-buried fixed support point (2) is embedded in the side wall concrete to a depth of 30 cm.

6. According to claim 1, a large steel ladle reinforced concrete protection door concrete pouring fixed door groove, characterized in that: The embedded fixed support point (2) is embedded in the concrete end and welded with a steel plate, the size of the steel plate is 150×150 cm.

7. The fixed door groove for concrete pouring of a large steel ladle reinforced concrete protection door according to claim 1 is characterized by: The pre-buried fixed fulcrums (2) are arranged in a plum blossom shape on the side wall in the length direction and are regularly arranged on the side wall in the width direction, with two pre-buried fixed fulcrums (2) buried in each row.

8. The fixed door groove for concrete pouring of a large steel ladle reinforced concrete protection door according to claim 1 is characterized by: The vertical spacing of the embedded fixed support points (2) is the same as the lengthwise spacing.

9. The fixed door groove for concrete pouring of a large steel ladle reinforced concrete protection door according to claim 1 is characterized by: The adjustable support base (8) is composed of a steel plate and adjustable bolts.

10. The fixed door groove for concrete pouring of a large steel ladle reinforced concrete protection door according to claim 1 is characterized by: The side walls and bottom plate of the fixed door slot (3) are made of reinforced concrete with a thickness of 50 cm.

Images