CN114016743B - Concrete pouring method for large-sized steel-clad reinforced concrete protective door - Google Patents
Concrete pouring method for large-sized steel-clad reinforced concrete protective door Download PDFInfo
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- CN114016743B CN114016743B CN202111434015.5A CN202111434015A CN114016743B CN 114016743 B CN114016743 B CN 114016743B CN 202111434015 A CN202111434015 A CN 202111434015A CN 114016743 B CN114016743 B CN 114016743B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/0007—Implements for finishing work on buildings for mounting doors, windows or frames; their fitting
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/70—Door leaves
- E06B3/7015—Door leaves characterised by the filling between two external panels
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/70—Door leaves
- E06B3/7015—Door leaves characterised by the filling between two external panels
- E06B2003/7028—Door leaves characterised by the filling between two external panels of cementituous type, e.g. concrete
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
A concrete pouring method for a large-sized reinforced concrete-clad protective door is suitable for filling concrete in a door cavity of a reinforced concrete-clad flat protective door, a specially-made fixed door slot is used as a fixed container of the reinforced concrete-clad protective door, the protective door is vertically arranged in the fixed door slot, conventional concrete filling of the protective door is transferred from the ground to the ground, and the fixed door slot is matched with an adjustable reinforcing bolt for supporting so as to ensure that the protective door is in a horizontal state and a vertical state in the concrete pouring process; the compactness in the concrete pouring process is ensured by adopting the attached vibrator and the layered pouring method; and a simpler self-discharging mode is adopted for concrete pouring. Therefore, the pouring method adopts the self-unloading vertical concrete pouring method of the flat protective door, ensures that the steel door plate of the protective door cannot deform in the whole concrete pouring process, avoids the quality problems of cavity interlayers and door plate deformation generated when the protective door is horizontally poured, and can realize industrialized batch production and prefabrication.
Description
The technical field is as follows:
the invention is mainly applied to the technical field of protection engineering, and is particularly suitable for concrete filling construction in the door cavity of the large-sized reinforced concrete-clad protective door.
Background art:
with the continuous development of national defense industry in China, national defense engineering is increasingly important. At present, the large-scale protective door in the field of protective engineering in China is common in four forms: a. steel ladle steel pipe concrete structure form; b. steel ladle reinforced concrete structure form; c. the beam-slab structure form is a beam-slab type; d. box steel sheet + reinforced concrete integrated configuration. Among them, the ladle reinforced concrete structure form has been widely used in recent years.
After the traditional steel-clad reinforced concrete protective door is welded in a factory, concrete is mostly poured in a horizontal mode, and concrete is transported into a door plate cavity through a concrete pump truck. The biggest disadvantages of this method are: 1. the door plate is not easy to level when being horizontally placed, a cavity interlayer is easy to form between the concrete surface and the steel door plate in the ending stage of concrete pouring, so that the combination of the steel plate and the concrete is not compact, and the overall stress of the steel-clad reinforced concrete protective door is finally influenced; 2. because the slump of the pump concrete is large and generally reaches 160-200 mm, when the concrete is poured by a horizontal method, if the protective door is not placed horizontally, the steel door plate is easy to deform locally, so that the overall appearance quality of the reinforced concrete protective door with the steel ladle is influenced, and meanwhile, hidden troubles are generated on the opening and closing operation of the subsequent protective door.
The invention content is as follows:
the invention aims to provide a concrete construction method of a steel-clad reinforced concrete protective door, which solves the quality problem of deformation of a cavity interlayer and a door plate generated when the protective door is horizontally poured, and can be used for industrial mass production and prefabrication of the steel-clad reinforced concrete protective door.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
the invention provides a concrete pouring method for a large-sized steel-clad reinforced concrete protective door, which comprises the following construction steps: 1. the special fixed gate slot is arranged below the ground and consists of a side wall, a bottom plate, a pre-embedded fixed fulcrum, an anti-collision safety protection pier and an adjustable support base; the height of the fixed gate slot is higher than that of the steel ladle reinforcing steel bar protection gate, an anti-collision safety protection pier is arranged on one circle of the top of the side wall of the fixed gate slot, and a pre-buried fixed fulcrum is embedded in side wall concrete; the side walls and the bottom plate jointly form a box-shaped structure. 2. During on-site construction, the steel ladle reinforcing steel bar protection door with the processed cavity is transferred into the fixed door groove; after the steel ladle steel bar protective door is hoisted in place, the steel ladle steel bar protective door is firstly stably stopped, the adjustable reinforcing bolt supports which are used as the side surface and the end head are grasped for reinforcing, and the crane can be removed after the steel ladle steel bar protective door is determined to be stable. 3. After preliminary firm, adopt measuring instrument to carry out the accurate positioning measurement, fix a position and consolidate after the measurement is accomplished, adjust ladle reinforcing bar guard gate's height and levelness through adjusting the adjustable support base of fixed gate tank bottom, support through the adjustable reinforcing bolt who adjusts side and end and adjust ladle reinforcing bar guard gate straightness that hangs down. 4. And after the whole reinforcement of the steel ladle reinforcing steel bar protective door is finished, the attached flat vibrator is installed. 5. And after the attached flat plate vibrator is installed, a pouring chute and a receiving hopper are installed, the receiving hopper and the chute must be communicated, and the chute penetrates into the steel ladle reinforcing bar protective door from a reserved chute hole at the upper end of the steel ladle reinforcing bar protective door. 6. The concrete is transported to a hopper-receiving position on the upper edge of the fixed gate trough by a concrete mixer truck, and is put into a bin in a self-discharging mode, and the same inflow of each chute is ensured by discharging each time; before the concrete is delivered into the warehouse, the attached flat vibrator is started, and the pouring and warehousing speed of the concrete is controlled. Constructing the concrete of the steel ladle reinforcing steel bar protective door, wherein the vertical direction is a regular rectangle, and the concrete is poured from the bottom to the upper part in a layered mode; firstly, the concrete is self-unloaded from a chute to enter the bottom of a steel ladle reinforcing steel bar protective door, the height of each time is ensured not to exceed 50cm in the unloading process, and the concrete rises in the height direction in a uniform distribution manner; secondly, when a second layer of concrete is laid on the top surface of the first layer of concrete, the bubbles of the first layer of concrete are completely removed, the thickness of the second layer of concrete is ensured to be below 50cm, and the discharging mode is the same as the first layer of concrete laying mode; and thirdly, analogizing in sequence, and continuously increasing the concrete along with the increase of the number of layers, and finally completing the pouring construction of the whole bin of concrete. 7. The steel ladle reinforcing steel bar protective door is characterized in that measurement observation points are arranged on two sides of the steel ladle reinforcing steel bar protective door, the deformation condition of a steel plate of the steel ladle reinforcing steel bar protective door is observed at any time in the pouring process, and the pouring speed is immediately slowed down if the deformation exceeding more than 1mm occurs. 8. When the concrete is poured to the final stage, the height of the concrete is flush with the reserved chute hole at the top of the steel ladle reinforcing steel bar protective door, after the concrete is finally set, the poured steel ladle reinforcing steel bar protective door is lifted out of the fixed door groove, and then the construction of the next steel ladle reinforcing steel bar protective door is carried out; and in the later stage, manual work is adopted to pick and chisel the concrete at the reserved chute hole on the steel ladle reinforcing steel bar protective door and use a small steel plate for plugging.
The side walls and the bottom plate of the fixed door slot are made of reinforced concrete, and the thickness of the side walls and the bottom plate is 50cm; when the steel ladle reinforcing steel bar protection door is placed in the fixed door groove, the working surface with the width of 1.2 meters is ensured around the steel ladle reinforcing steel bar protection door.
The height of the anti-collision safety protection pier is 30cm.
The embedded fixed pivot adopts a national standard steel pipe with the diameter of 480mm and the wall thickness of 10mm, and the embedded depth of concrete is 30cm; and welding steel plates with the size of 150 multiplied by 150cm at the end embedded into the concrete.
The embedded fixed fulcrums are arranged on the side wall in the length direction in a quincunx shape, and are regularly arranged on the side wall in the width direction, and 2 embedded fixed fulcrums are embedded in each row; the distance between the pre-buried fixed pivot points in the vertical direction is the same as that in the length direction.
The adjustable supporting base is composed of a steel plate and an adjustable bolt.
The attached flat plate vibrator adopts a ZW-10 attached concrete vibrator, the vibration frequency is 2840r.P.M, the excitation force is 980kgf, the rated voltage is 380V, the motor power is 2.2kW, and the action radius is 2.0m.
The receiving hopper is horn-shaped, the chute is circular, the chute is a hose chute, the distance between the upper bottom plate of the side wall and the bottom of the chute is less than or equal to 30CM, and the horizontal distance between the chutes is less than or equal to 2 meters.
The concrete performance configuration adopts the following mixture ratio and standard concrete:
the concrete construction control is that when C60 self-compacting concrete is adopted, the expansion degree of the concrete is controlled to be 660-755mm.
Compared with the prior art, the invention has the following beneficial effects:
1. the pouring method adopts the specially-made fixed gate slot as the fixed container of the steel-clad reinforced concrete protective gate, and the conventional steel-clad reinforced concrete protective gate concrete filling is transferred from the ground to the ground, so that the construction height is reduced, and the construction difficulty is reduced.
2. The pouring method provided by the invention adopts the mode of supporting by the adjustable reinforcing bolt in the fixed door slot for reinforcement, and is firmer and more scientific than the traditional reinforcing mode.
3. The adjustable reinforcing bolt in the fixed door groove and the reinforcing bolt on the adjustable supporting base adopted in the pouring method are adjustable bolts, so that the steel ladle reinforcing steel bar protective door can be ensured to be in a horizontal state and a vertical state in the pouring process, and the pouring quality is prevented from being influenced by the fact that the steel ladle reinforcing steel bar protective door is not horizontal in the pouring process of concrete.
4. The pouring method adopts the attached vibrator and the layered concrete pouring method, ensures the compactness in the concrete pouring process, prevents the phenomena of vibration leakage and the like, overcomes the defect of tight fit between the concrete and the steel plate of the steel ladle reinforced concrete protective door in the traditional method, and integrally enhances the filling construction quality of the concrete of the steel ladle reinforced concrete protective door.
5. By adopting the pouring method, the steel ladle reinforcing steel bar protective door is erected, the area of concrete entering a bin is reduced, the uniform stress of the concrete in the pouring process can be ensured, and the quality problems of drying, cold joint and the like when the concrete is spread in a large area are avoided.
6. The pouring method can carry out quick pouring by adopting a self-unloading concrete pouring mode, the corresponding concrete tank cars are configured according to the number of the chutes, the time for continuously and alternately changing the feed openings for ensuring the synchronous rising of the concrete pouring is reduced in the whole process, the time spent in pouring is greatly reduced as long as the concrete is supplied in time in the pouring process, the concrete pouring speed is accelerated, the construction efficiency is improved, the construction period is saved, and the construction cost is saved.
7. According to the pouring method, the special chute hole is reserved on the steel ladle reinforcing steel bar protective door, so that the later plugging procedure is reduced; the natural soil pressure on the two sides of the fixed gate slot is used for resisting the lateral pressure of the steel plate of the steel ladle reinforcing steel bar protective door by concrete in the concrete construction process of the steel ladle reinforcing steel bar protective door, so that the construction quality is ensured.
In conclusion, the invention discloses a concrete filling construction method suitable for the interior of a door cavity of a large-sized steel-clad reinforced concrete flat protective door, which ensures that the steel-clad reinforced protective door is in a horizontal state and a vertical state in the concrete pouring process by adopting a method of matching a special fixed door groove and supporting by an adjustable reinforcing bolt, reduces the space height of the steel-clad reinforced protective door by putting the steel-clad reinforced protective door into the fixed door groove, and simplifies the concrete pouring process by adopting a simpler self-unloading mode for concrete pouring. Therefore, the pouring method of the invention adopts the special fixed gate slot to reinforce the steel-clad reinforced concrete protective gate, and ensures that the steel door plate of the steel-clad reinforced concrete protective gate cannot deform in the whole process of concrete pouring.
Description of the drawings:
FIG. 1 is a schematic view of the fixed door slot configuration of the present invention;
FIG. 2 is a schematic view of a steel reinforcement protective door of a fixed door slot reinforcement ladle according to the present invention;
fig. 3 is a concrete pouring schematic diagram of the ladle reinforcing steel bar protective door of the invention.
Reference numbers in the figures:
1-anti-collision safety protection pier, 2-pre-embedded fixed pivot, 3-fixed gate slot, 4-adjustable reinforcing bolt support, 5-attached flat vibrator, 6-steel ladle reinforcing steel bar protection gate, 7-chute, 8-adjustable support base, 9-reserved chute slot hole, 10-receiving hopper, and 11-first layer concrete top surface.
The specific implementation mode is as follows:
the invention is further explained by combining the specific embodiment, and referring to fig. 1-3, the invention provides a concrete pouring method for a large-sized reinforced concrete-clad protective door, which is a self-unloading vertical concrete pouring method for a large-sized reinforced concrete-clad flat protective door, and comprises the following construction steps:
1. specially-made fixed door slot 3: a specially-made fixed door slot 3 is used as a fixed container of the reinforced concrete protective door of the steel ladle. The fixed gate slot 3 is the core content of the invention, the fixed gate slot 3 is arranged below the ground and consists of a side wall, a bottom plate, a pre-embedded fixed pivot 2, an anti-collision safety protection pier 1 and an adjustable supporting base 8. The fixed gate slot 3 is constructed to meet the following points: A. the bottom bearing capacity of the fixed door slot 3 meets the requirement of bearing the whole weight of the steel-clad reinforced concrete; B. the fixed door slot 3 has enough width and length to meet the requirement of vertical operation of operators, and when the steel ladle reinforcing steel bar protective door 6 is placed in the fixed door slot 3, the periphery of the steel ladle reinforcing steel bar protective door 6 is suitable for ensuring a working surface with the width of 1.2 meters; C. the height of the fixed gate slot 3 is higher than that of the steel ladle reinforcing steel bar protective gate 6 to be processed, so that the tank car can conveniently take place and self-unload when pouring concrete; D. 3 side wall tops of fixed gate slot should set up anticollision safety fender mound 1, and the main objective is to guarantee the tank car safety of backing a car, prevents simultaneously that ground upper portion object from falling into fixed gate slot 3 and causing personnel's injury, and anticollision safety fender mound 1 height 30cm is suitable. E. The embedded fixed pivot 2 can adopt a national standard steel pipe with a nominal diameter of 480mm and a wall thickness of 10mm, the embedded depth of concrete in the side wall is 30cm, a steel plate is welded at the end of the embedded concrete, and the size of the steel plate is preferably 150 multiplied by 150cm. The pre-buried fixed fulcrums 2 are preferably arranged on the side walls in the length direction in a plum blossom shape, the side walls in the width direction are preferably arranged regularly, 2 pre-buried fixed fulcrums 2 are buried in each row, and the distance in the vertical direction is preferably the same as that in the length direction. F. The adjustable supporting base 8 is composed of a steel plate and an adjustable bolt, is mainly used for adjusting the levelness of the steel ladle reinforcing steel bar protective door 6, and can be properly lifted or lowered according to the size of the steel ladle reinforcing steel bar protective door 6 to meet the pouring requirement of concrete. The side wall and the bottom plate of the fixed door slot 3 are preferably 50cm in thickness, and are made of reinforced concrete, and the side wall and the bottom plate jointly form a box structure which is mainly used for placing a steel ladle reinforcing bar protective door 6 to be poured, so that a reinforcement measure with reliable temperature is provided for the concrete pouring of the steel ladle reinforcing bar protective door 6, and the self-discharging requirement of concrete can be met.
2. The steel ladle reinforcing steel bar protective door 6 is transferred and transported and put in place: in the field construction process, the steel ladle reinforcing steel bar protective door 6 with the processed cavity is transferred into the fixed door slot 3; after the steel ladle steel bar protective door is hoisted in place, the steel ladle steel bar protective door is firstly stably stopped, the adjustable reinforcing bolt supports 4 which are used as the side surfaces and the end heads are tightly clamped for reinforcing, the adjustable reinforcing bolt supports 4 are connected to the pre-buried fixed supporting points 2, the reinforcing part of the side surfaces and the end heads is completed, and the crane can be removed after the steel ladle steel bar protective door 6 is determined to be stable.
3. The steel ladle reinforcing steel bar protective door 6 is precisely positioned and reinforced: after the preliminary firm, adopt measuring instrument to carry out the accurate positioning measurement, fix a position and consolidate after the measurement is accomplished, adjust ladle reinforcing bar guard gate 6's height and levelness through adjusting the adjustable bolt on the adjustable support base 8 in fixed gate groove 3 bottom, adjust ladle reinforcing bar guard gate 6's straightness that hangs down through adjusting the adjustable bolt on the adjustable reinforcing bolt support 4 of side and end.
4. Installing an attached flat vibrator 5: the steel ladle reinforcing steel bar protection door 6 is integrally reinforced and then is provided with the attached flat plate vibrator 5, the attached flat plate vibrator 5 adopts a ZW-10 attached concrete vibrator, the vibration frequency is 2840r.P.M, the excitation force is 980kgf, the rated voltage is 380V, the motor power is 2.2kW, the action radius is 2.0m, the specific arrangement quantity is calculated and determined according to the size of the steel ladle reinforcing steel bar protection door 6, the attachment flat plate vibrator 5 is finally guaranteed to be lapped by 50cm in the vibration radius during field operation, and non-blind area full-coverage vibration is realized.
5. Installing a pouring chute 7 and a receiving hopper 10: after the attached flat plate vibrator 5 is installed, a chute 7 and a receiving hopper 10 are installed, the receiving hopper 10 must be communicated with the chute 7, the receiving hopper 10 is horn-shaped, the chute 7 is circular, the chute 7 can be a hose chute and mainly penetrates through and avoids steel bars in a steel ladle steel bar protective door 6, and the diameter of the chute 7 is determined according to the row spacing between the steel bars in the steel ladle steel bar protective door 6; the distance between the bottom of the chute 7 and the bottom plate of the steel ladle reinforcing bar protection door 6 is not more than 30CM, the number of the chutes 7 is determined according to the length of the steel ladle reinforcing bar protection door 6, but the horizontal distance is not more than 2 m. Chute 7 penetrates in ladle reinforcing bar guard gate 6 by reservation chute hole 9 of ladle reinforcing bar guard gate 6 upper end, and chute 7 is connected by the segment of 1 meter length, and at the concrete placement in-process, along with the rising of concrete, gradually improve chute 7 from ladle reinforcing bar guard gate 6 in and in time pull down chute 7 section by section, prevent that chute 7 burial depth is too much, the unable condition of taking out.
6. Concrete warehousing and pouring construction: the concrete is transported to the position of the receiving hopper 10 on the upper edge of the fixed door slot 3 by the concrete mixer truck, and is put into a bin in a self-discharging mode, and the inflow of each chute 7 is ensured to be the same by discharging each time, so that the rising height of the concrete in the fixed door slot 3 is kept at the same level; the attached flat vibrator 5 is started before the concrete is put into a warehouse, the common acting force of the lateral pressure of the concrete at the bottom of the steel ladle reinforcing steel bar protective door 6 and the outer adjustable reinforcing bolt support 4 is considered in the speed of pouring and putting the concrete into the warehouse, and the outer adjustable reinforcing bolt support 4 is ensured to be capable of resisting the lateral pressure generated by the concrete to the steel plate of the steel ladle reinforcing steel bar protective door 6 in the process of pouring and rising and preventing the steel plate from deforming.
The pouring construction comprises concrete performance configuration, concrete construction of a steel ladle reinforcing steel bar protective door 6 and concrete construction control:
1) The concrete performance configuration adopts the following mixture ratio and standard concrete:
2) And (3) concrete construction of the steel ladle reinforcing steel bar protective door 6: the vertical direction is a regular rectangle, and the pouring is sequentially carried out from the bottom to the upper part in a layering manner.
Firstly, concrete enters the bottom of a steel ladle reinforcing steel bar protective door 6 from a chute 7 in a self-unloading manner, the height of each time is ensured not to exceed 50cm in the unloading process, and the concrete is uniformly distributed in the ascending of the height direction.
And secondly, when the second layer of concrete is laid on the top surface 11 of the first layer of concrete, the bubbles of the first layer of concrete are completely removed, the concrete cannot be laid under the condition that the bubbles are continuously removed, the thickness of the second layer of concrete is ensured to be below 50cm, the discharging mode is the same as the first layer of concrete laying mode, the steel plate deformation observation of the steel ladle steel bar protective door 6 is carried out at any time during the casting, the concrete casting is suspended when the deformation exceeding the standard allowance is found, the concrete casting is continued after the concrete is stabilized for a period of time, the bleeding in the bin is timely removed by a suction pipe when the bleeding phenomenon is found in the casting process, and the quality problems of segregation and the like caused by the bleeding of the concrete are prevented.
And thirdly, analogizing in sequence, and continuously increasing the concrete along with the increase of the number of layers, and finally completing the pouring construction of the whole bin of concrete.
3) Controlling concrete construction: in this embodiment, as an example of C60 self-compacting concrete, the expansion of the concrete is preferably controlled to 660-755mm.
7. The two sides of the steel ladle reinforcing steel bar protective door 6 are provided with measurement observation points, the deformation condition of the steel plate of the steel ladle reinforcing steel bar protective door 6 is observed at any time in the pouring process, if the deformation exceeding more than 1mm occurs, the pouring speed is slowed down immediately, and after the concrete of the lower layer is close to initial setting and has certain bearing capacity, the concrete pouring of the upper layer is continued.
8. In the final stage of concrete pouring, the height of the concrete is flush with the reserved chute hole 9 at the top of the steel ladle reinforced concrete protective door 6, after the concrete is finally set, the poured steel ladle reinforced concrete protective door 6 can be lifted out of the fixed door groove 3, namely, the manufacture of the steel ladle reinforced concrete protective door is finished, and then the construction of the next steel ladle reinforced concrete protective door 6 is carried out; and in the later stage, manually chiseling the concrete at the reserved chute hole 9 and plugging the concrete by using a small steel plate.
Claims (10)
1. A concrete pouring method for a large-sized steel-clad reinforced concrete protective door is characterized by comprising the following steps: the pouring method comprises the following construction steps:
1. specially-made fixed door slot (3): the fixed door slot (3) is arranged below the ground and consists of a side wall, a bottom plate, a pre-embedded fixed fulcrum (2), an anti-collision safety protection pier (1) and an adjustable support base (8); the fixed door slot (3) has enough width and length, and when the steel ladle reinforcing steel bar protection door (6) is placed in the fixed door slot (3), a working surface with certain width is ensured around the steel ladle reinforcing steel bar protection door (6); the height of the fixed door slot (3) is higher than that of a steel ladle reinforcing steel bar protective door (6) to be processed; the top of the side wall is provided with a circle of anti-collision safety protection piers (1); the pre-buried fixed pivot (2) is buried in the concrete of the side wall; the side walls and the bottom plate form a box-shaped structure together;
2. the steel ladle reinforcing steel bar protection door (6) is transferred and transported and is in place: in the field construction process, the steel ladle reinforcing steel bar protective door (6) with the processed cavity is transferred into the fixed door groove (3); after the steel ladle steel bar protective door is hoisted in place, the steel ladle steel bar protective door is firstly stably stopped, an adjustable reinforcing bolt support (4) which is used for constructing the side surface and the end head is tightly clamped for reinforcing, the adjustable reinforcing bolt support (4) is connected to an embedded fixed fulcrum (2), the reinforcing part of the side surface and the end head is completed, and a crane can be removed after the steel ladle steel bar protective door (6) is determined to be stable;
3. the steel ladle reinforcing steel bar protective door (6) is precisely positioned and reinforced: after the preliminary stabilization is finished, a measuring instrument is adopted to carry out accurate positioning measurement, positioning reinforcement is carried out after the measurement is finished, the height and the levelness of the steel ladle reinforcing steel bar protective door (6) are adjusted by adjusting an adjustable bolt on an adjustable supporting base (8) at the bottom of a fixed door groove (3), and the verticality of the steel ladle reinforcing steel bar protective door (6) is adjusted by adjusting an adjustable bolt on an adjustable reinforcing bolt support (4) at the side surface and the end head;
4. installing an attached flat vibrator (5): after the steel ladle reinforcing steel bar protection door (6) is integrally reinforced, the attached flat plate vibrators (5) are installed, the specific arrangement number of the attached flat plate vibrators (5) is calculated and determined according to the size of the steel ladle reinforcing steel bar protection door (6), and the attached flat plate vibrators (5) are finally ensured to be overlapped by 50cm in vibrating radius during field operation, so that non-blind-area full-coverage vibrating is realized;
5. installing a pouring chute (7) and a receiving hopper (10): after the attached flat vibrator (5) is installed, a pouring chute (7) and a receiving hopper (10) are installed, the receiving hopper (10) and the chute (7) must be communicated, and the diameter of the chute (7) is determined according to the row spacing between the steel bars in the steel bar protecting door (6) of the ladle; the number of the chutes (7) is determined according to the length of the steel ladle reinforcing steel bar protection door (6); the chute (7) penetrates into the steel ladle reinforcing steel bar protective door (6) from a reserved chute hole (9) at the upper end of the steel ladle reinforcing steel bar protective door (6);
6. concrete warehousing and pouring construction: the concrete is transported to the position of a receiving hopper (10) on the upper edge of the fixed door slot (3) by a concrete mixer truck, and is put into a bin in a self-unloading mode, and the inflow of each chute (7) is ensured to be the same by each unloading, so that the rising height of the concrete in the fixed door slot (3) is kept at the same level; before concrete enters a warehouse, the attached flat plate vibrator (5) is started to control the speed of pouring the concrete into the warehouse, and the outer adjustable reinforcing bolt support (4) can meet the requirement of resisting the lateral pressure generated by the concrete to a steel plate of a steel ladle reinforcing steel bar protective door (6) in the process of pouring and rising without deforming the steel plate;
the pouring construction comprises concrete performance configuration, concrete construction of a steel ladle reinforcing steel bar protective door (6) and concrete construction control:
the steel ladle steel bar protective door (6) is constructed by concrete, is in a regular rectangle in the vertical direction, and is poured from the bottom to the upper part in a layered mode; firstly, the concrete is self-unloaded from a chute (7) and enters the bottom of a steel ladle reinforcing steel bar protective door (6), the unloading height of each time is ensured not to exceed 50cm in the unloading process, and the concrete is uniformly distributed in the ascending of the height direction; secondly, when a second layer of concrete is paved on the top surface (11) of the first layer of concrete, the bubbles of the first layer of concrete are completely removed, the thickness of the second layer of concrete is ensured to be below 50cm, and the unloading mode is the same as the paving mode of the first layer of concrete; thirdly, analogizing in sequence, and continuously increasing the concrete along with the increase of the number of layers to finally finish the pouring construction of the whole bin of concrete;
7. measuring observation points are arranged on two sides of the steel ladle reinforcing steel bar protective door (6), the deformation condition of a steel plate of the steel ladle reinforcing steel bar protective door (6) is observed at any time in the pouring process, if the deformation exceeding more than 1mm occurs, the pouring speed is slowed down immediately, and after the lower-layer concrete is close to initial setting and has certain bearing capacity, the upper-layer concrete pouring is continued;
8. in the final stage of concrete pouring, the height of the concrete is flush with a reserved chute hole (9) at the top of the steel ladle reinforced concrete protective door (6), after the concrete is finally set, the poured steel ladle reinforced concrete protective door (6) is lifted out of the fixed door groove (3), namely the steel ladle reinforced concrete protective door is manufactured, and then the construction of the next steel ladle reinforced concrete protective door (6) is carried out; and in the later stage, manual work is adopted to pick and chisel concrete at the reserved chute hole (9) on the reinforced concrete protective door of the steel ladle and to plug the concrete by using a small steel plate.
2. The method for pouring the concrete of the large-sized steel-clad reinforced concrete protective door according to claim 1, which is characterized in that: the side walls and the bottom plate of the fixed door slot (3) are made of reinforced concrete, and the thickness is 50cm; when the steel ladle reinforcing steel bar protection door (6) is placed in the fixed door groove (3), the working surface with the width of 1.2 meters is ensured around the steel ladle reinforcing steel bar protection door (6).
3. The method for pouring the concrete of the large-sized steel-clad reinforced concrete protective door according to claim 1, which is characterized in that: the height of the anti-collision safety protection pier (1) is 30cm.
4. The method for pouring the concrete for the large-sized steel-clad reinforced concrete protective door according to claim 1, which is characterized by comprising the following steps of: the embedded fixed pivot (2) adopts a national standard steel pipe with the diameter of 480mm and the wall thickness of 10mm, and the embedded depth of concrete is 30cm; and welding steel plates with the size of 150 multiplied by 150cm at the end embedded into the concrete.
5. The method for pouring the concrete of the large-sized steel-clad reinforced concrete protective door according to claim 1, which is characterized in that: the embedded fixed fulcrums (2) are arranged on the side wall of the fixed door slot (3) in the length direction in a quincunx shape, the side wall of the fixed door slot (3) in the width direction is regularly arranged, and 2 embedded fixed fulcrums (2) are embedded in each row; the distance between the embedded fixed supporting points (2) in the vertical direction of the side wall of the fixed door slot (3) is the same as the distance in the length direction of the fixed door slot (3).
6. The method for pouring the concrete for the large-sized steel-clad reinforced concrete protective door according to claim 1, which is characterized by comprising the following steps of: the adjustable supporting base (8) is composed of a steel plate and an adjustable bolt.
7. The method for pouring the concrete of the large-sized steel-clad reinforced concrete protective door according to claim 1, which is characterized in that: the attached flat plate vibrator (5) adopts a ZW-10 attached concrete vibrator, the vibration frequency is 2840r.P.M, the excitation force is 980kgf, the rated voltage is 380V, the motor power is 2.2kW, and the action radius is 2.0m.
8. The method for pouring the concrete for the large-sized steel-clad reinforced concrete protective door according to claim 1, which is characterized by comprising the following steps of: connect hopper (10) for tubaeform, chute (7) are circular, chute (7) are the hose chute, chute (7) bottom apart from ladle reinforcing bar guard gate (6) bottom plate distance ≦ 30CM, chute (7) horizontal spacing ≦ 2 meters.
9. The method for pouring the concrete of the large-sized steel-clad reinforced concrete protective door according to claim 1, which is characterized in that: the concrete performance configuration adopts the following mixture ratio and standard concrete, the designed expansion degree of the concrete is 660-755mm, the water-cement ratio is 0.28, the sand rate is 49%, and the concrete materials per cubic meter are 177kg of water, 475kg of cement, 95kg of fly ash, 63kg of mineral powder, 767kg of 0-5mm fine aggregate, 789kg of 5-10mm coarse aggregate and 9.5kg of AJF water reducing agent.
10. The method for pouring the concrete of the large-sized steel-clad reinforced concrete protective door according to claim 1, which is characterized in that: the concrete construction control is that when C60 self-compacting concrete is adopted, the expansion degree of the concrete is controlled to be 660-755mm.
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