Concrete pouring system and visual detection method for large cavity-divided closed steel box girder

Abstract

The invention relates to a concrete pouring system and a visual detection method for a large-scale cavity-divided closed steel box girder, and the method comprises the following steps: 1, connecting side plates at the periphery of the large-scale cavity-divided closed steel box girder with a bottom plate, and manufacturing a rectangular three-dimensional structure without a top cover; 2, a middle partition plate is manufactured, and a lower bracket is installed; thirdly, the first electric wire and the grouting device are arranged in the second through hole in a penetrating mode; fourthly, a middle partition plate is installed; fifthly, the upper end of the first electric wire and the upper end of the grouting device correspondingly penetrate out of a first penetrating hole in the top plate; sixthly, the top plate is sealed at the tops of the peripheral side plates; 7, connecting the first power supply and the first indicator in series through a first electric wire; eighthly, concrete is poured; and ninthly, concrete is continuously poured till the concrete overflows out of the first penetrating holes, and construction is completed. The technical problem that in a traditional pouring mode, pouring of the most unfavorable position and an effective monitoring means cannot be achieved is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering construction, and particularly relates to a concrete pouring system and a visual detection method for a large-scale divided-cavity closed steel box girder. Background Art

[0002] In the traditional method of pouring concrete in a closed box girder in separate chambers, due to the fluidity of concrete pouring, the concrete at the farthest corner in the rectangular cavity often cannot be poured densely, and it is impossible to determine whether it is poured densely. Summary of the invention

[0003] The purpose of the present invention is to provide a concrete pouring system and a visual detection method for a large-scale divided-cavity closed steel box girder, so as to solve the technical problem that the traditional pouring method cannot cast in the most unfavorable position and has no effective monitoring means.

[0004] To achieve the above purpose, the present invention adopts the following technical solution.

[0005] A concrete pouring system for a large-scale divided-cavity closed steel box girder, the large-scale divided-cavity closed steel box girder comprises a rectangular three-dimensional structure surrounded by a bottom plate, four side plates and a top plate; a middle partition is arranged inside the rectangular three-dimensional structure along the longitudinal length; the middle partition divides the internal space of the rectangular three-dimensional structure into an upper cavity and a lower cavity; lower brackets are arranged on the top and the side walls on both sides of the lower cavity; a first through hole is provided on the top plate of the large-scale divided-cavity closed steel box girder along the longitudinal interval, and a second through hole is provided on the middle partition at a position corresponding to the first through hole; the concrete pouring system comprises a grouting device and a first monitoring device; the grouting device has a group, which is arranged along the longitudinal interval, and the grouting device is arranged corresponding to the first through hole; the grouting device is penetrated in the first through hole and the second through hole, Used to pour concrete into the lower cavity; there is a group of the first monitoring devices, which are arranged at intervals along the longitudinal direction, and the first monitoring devices are arranged corresponding to the first perforations; the first monitoring devices include a first power supply, a first wire and a first indicator; the first power supply and the first indicator are arranged on the top of the large-scale divided chamber closed steel box girder, and the first power supply and the first indicator are connected in series to form a circuit through the first wire; the lower part of the first wire extends into the lower cavity, close to the position of the middle partition, and the first wire is disconnected at the position in the lower cavity; the wires on both sides of the circuit break are horizontally bent to the left and right sides respectively to form a first bending section, and the first bending section is laid on the lower bracket close to the position of the middle partition; the ends of the first bending sections on both sides extend to the top corners close to the left and right sides of the lower cavity respectively.

[0006] Preferably, the grouting device includes a main grouting pipe, a branch grouting pipe and a grouting pump; the main grouting pipe is penetrated in the first perforation, and the lower end of the main grouting pipe passes through the second perforation and extends into the lower cavity, and the upper end of the main grouting pipe is connected to the grouting pump; the lower end of the main grouting pipe is divided into two branch grouting pipes, and the two branch grouting pipes are horizontally arranged on the left and right sides of the main grouting pipe; the branch grouting pipes are laid on the lower bracket.

[0007] Preferably, first anti-shear bolts are respectively arranged on the bottom surface of the middle partition at the top of the lower cavity and on the side walls around the lower cavity; a first drag rod is connected between the ends of the laterally adjacent first anti-shear bolts located at the bottom of the middle partition and between the longitudinally adjacent first anti-shear bolts; the first drag rod and the first anti-shear bolt constitute the lower bracket.

[0008] Preferably, the sub-grouting pipe is arranged at a position not more than 100 mm away from the middle partition.

[0009] Preferably, the distance between the end of the first bending section and the side wall on the corresponding side of the lower cavity is not greater than 100 mm; the distance between the first bending section and the middle partition is not greater than 50 mm.

[0010] Preferably, lower U-shaped partitions are arranged in the lower cavity along the longitudinal intervals; the second perforations are located between adjacent lower U-shaped partitions or between the lower U-shaped partition at the end and the end plate of the large-scale divided-chamber closed steel box girder; upper U-shaped partitions are arranged in the upper cavity along the longitudinal intervals; the upper U-shaped partitions and the lower U-shaped partitions are arranged vertically corresponding to each other.

[0011] Preferably, a second monitoring device is also included; the second monitoring device includes a second power supply, a second electric wire and a second indicator; the second power supply and the second indicator are arranged on the top of the large-scale divided-cavity enclosed steel box girder, and the second power supply and the second indicator are connected in series to form a circuit through the second electric wire; an upper bracket is arranged on the top and the side walls on both sides of the upper cavity; the lower part of the second electric wire extends into the upper cavity, close to the top plate of the large-scale divided-cavity enclosed steel box girder, and the second electric wire is disconnected at the position in the upper cavity; the electric wires on both sides of the circuit break are horizontally bent to the left and right sides respectively to form a second bending section, and the second bending section is laid on the upper bracket close to the top plate; the end of the second bending section extends to the position close to the left and right side walls of the large-scale divided-cavity enclosed steel box girder.

[0012] A visual detection method for a concrete pouring system of a large-scale divided-cavity closed steel box girder comprises the following steps: Step 1: Connect the side plates and bottom plate of the large-scale compartment-enclosed steel box girder to form a rectangular three-dimensional structure without a top cover; Step 2: Make the middle partition and install the lower bracket; Step 3: insert the first wire and the grouting device into the second through hole, and horizontally bend the lower ends of the wire to form a first bending section; then lay the first bending section on the lower bracket, and make the end of the first bending section close to the corner of the middle partition and the side plate corresponding to the large-scale compartment-enclosed steel box girder; Step 4: Install the middle partition: Connect the sides of the middle partition to the side panels of the large-scale compartment-enclosed steel box girder accordingly; Step 5, passing the upper end of the first electric wire and the upper end of the grouting device through the first through-hole on the top plate respectively; Step 6: seal the top plate to the top of the surrounding side plates; Step 7, connecting the first power source and the first indicator in series via a first wire; Step eight, pouring concrete, using the theoretical calculated volume to control the pouring volume, when the calculated volume of concrete is reached or the pouring device can no longer pour concrete, inject the grouting material into the cavity through the grouting pump pressure, and observe the first indicator at the same time to determine whether the concrete has reached the designed height. When the first indicator shows on, it can be proved that the concrete has reached the required design height and the large-scale compartment closed steel box girder has reached a full state; Step nine, continue pouring concrete until concrete overflows from the first perforation, and the construction is now completed.

[0013] Preferably, when the grouting device includes a main grouting pipe, branch grouting pipes and a grouting pump, in step three, two branch grouting pipes are horizontally laid on the lower bracket.

[0014] Preferably, when the concrete pouring system includes a second monitoring device, a second electric wire is installed in the upper cavity between step four and step five; the upper end of the second electric wire and the upper end of the grouting device are first passed through the first through hole on the top plate correspondingly; after the top plate is sealed on the top of the surrounding side plates, the second power supply and the second indicator are connected in series through the second electric wire.

[0015] Compared with the prior art, the present invention has the following characteristics and beneficial effects.

[0016] 1. During construction, the method of the present invention pours self-compacting concrete into the cavity under the box beam through a grouting device, and controls the pouring volume by using the theoretical calculated volume. When the calculated volume is reached or the self-compacting concrete cannot be poured into the steel casing any further, the grouting material is pressure-injected into the cavity through a grouting pump, and the first indicator is observed at the same time. The grouting material liquid level rises, and the electrical conductivity of the grouting material is used to connect the circuit, the system current loop, and the first indicator is triggered to display the connection, which can prove that the concrete has reached the design height and the cavity under the box beam has reached a full state, thereby ensuring that the pouring quality meets the design requirements.

[0017] 2. When pouring concrete in a closed box girder in a sub-cavity, due to the characteristics of the fluidity of concrete pouring, the concrete at the farthest corner in the rectangular cavity often cannot be poured densely, and it is impossible to determine whether it is poured densely. Therefore, a corresponding grouting device and a monitoring device are provided in the present invention, wherein the main grouting pipe in the grouting device is used for grouting, and the sub-grouting pipes on both sides guide the slurry to the sub-grouting pipes horizontally arranged on both sides of the left and right cavities of the main grouting pipe, and are monitored by a monitoring device. If the circuit is not connected, the grouting pump is continued to be used for grouting until the circuit is connected. This construction method can ensure the construction quality and has an effective and reliable detection method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a cross-sectional structural schematic diagram of an upper bracket and a lower bracket arranged in a large-scale divided-cavity closed steel box girder of the present invention.

[0020] Figure 2 The invention discloses a cross-sectional structural diagram of a grouting device arranged in a large-scale divided-cavity closed steel box girder.

[0021] Figure 3 It is a cross-sectional structural schematic diagram of a first monitoring device arranged in a large-scale divided-cavity closed steel box girder of the present invention.

[0022] Figure 4 It is a schematic cross-sectional structure diagram of a second monitoring device arranged in a large-scale divided-cavity closed steel box girder of the present invention.

[0023] Figure 5 This is a schematic diagram of the longitudinal section structure of the first monitoring device installed in the large-scale divided cavity closed steel box girder of the present invention. Figure numerals: 1-large divided chamber closed steel box girder, 2-middle partition, 3-upper cavity, 4-lower cavity, 5-first perforation, 6-second perforation, 7-lower bracket, 8-grouting device, 8.1-main grouting pipe, 8.2-sub-grouting pipe, 8.3-grouting pump, 9-first monitoring device, 9.1-first power supply, 9.2-first electric wire, 9.3-first indicator, 9.4-first bending section, 10-first shear bolt, 11-first drag rod, 12-lower U-shaped partition, 13-upper U-shaped partition, 14-second monitoring device, 14.1-second power supply, 14.2-second electric wire, 14.3-second indicator, 15-upper bracket, 16-second shear bolt, 17-second drag rod. DETAILED DESCRIPTION

[0024] like Figure 1-5As shown, the concrete pouring system of this large-scale divided-cavity closed steel box girder, the large-scale divided-cavity closed steel box girder 1 includes a rectangular three-dimensional structure surrounded by a bottom plate, four side plates and a top plate; a middle partition plate 2 is arranged inside the rectangular three-dimensional structure along the longitudinal length; the middle partition plate 2 divides the internal space of the rectangular three-dimensional structure into an upper cavity 3 and a lower cavity 4; lower brackets 7 are arranged on the top and side walls of the lower cavity 4; first through holes 5 are provided on the top plate of the large-scale divided-cavity closed steel box girder 1 along the longitudinal interval, and second through holes 6 are provided on the middle partition plate 2 at the position corresponding to the first through holes 5; the concrete pouring system includes a grouting device 8 and a first monitoring device 9; the grouting device 8 has a group, which is arranged along the longitudinal interval, and the grouting device 8 is arranged corresponding to the first through hole 5; the grouting device 8 is penetrated in the first through hole 5 and the second through hole 6 to pour concrete into the lower cavity 4 ; There is a group of the first monitoring devices 9, which are arranged at intervals along the longitudinal direction, and the first monitoring devices 9 are arranged corresponding to the first perforations 5; the first monitoring devices 9 include a first power supply 9.1, a first wire 9.2 and a first indicator 9.3; the first power supply 9.1 and the first indicator 9.3 are arranged on the top of the large-scale divided chamber closed steel box girder 1, and the first power supply 9.1 and the first indicator 9.3 are connected in series to form a circuit through the first wire 9.2; the lower part of the first wire 9.2 extends into the lower cavity 4, close to the position of the middle partition 2, and the first wire 9.2 is disconnected at the position inside the lower cavity 4; the wires on both sides of the circuit break are horizontally bent to the left and right sides respectively to form a first bending section 9.4, and the first bending section 9.4 is laid on the lower bracket 7 close to the position of the middle partition 2; the ends of the first bending sections 9.4 on both sides extend to the top corners close to the left and right sides of the lower cavity 4 respectively.

[0025] In this embodiment, the grouting device 8 includes a main grouting pipe 8.1, a branch grouting pipe 8.2 and a grouting pump 8.3; the main grouting pipe 8.1 is penetrated in the first perforation 5, and the lower end of the main grouting pipe 8.1 passes through the second perforation 6 and extends into the lower cavity 4, and the upper end of the main grouting pipe 8.1 is connected to the grouting pump 8.3; the lower end of the main grouting pipe 8.1 is divided into two branch grouting pipes 8.2, and the two branch grouting pipes 8.2 are horizontally arranged on the left and right sides of the main grouting pipe 8.1; the branch grouting pipes 8.2 are laid on the lower bracket 7.

[0026] In this embodiment, first anti-shear bolts 10 are respectively arranged on the bottom surface of the middle partition 2 at the top of the lower cavity 4 and on the side walls around the lower cavity 4; a first drag rod 11 is connected between the ends of the laterally adjacent first anti-shear bolts 10 located at the bottom of the middle partition 2 and between the longitudinally adjacent first anti-shear bolts 10; the first drag rod 11 and the first anti-shear bolt 10 constitute the lower bracket 7.

[0027] In this embodiment, second anti-shear bolts 16 are respectively arranged on the bottom surface of the top plate at the top of the upper cavity 3 and on the side walls around the upper cavity 3; a second drag rod 17 is connected between the ends of the second anti-shear bolts 16 adjacent to each other in the transverse direction and between the second anti-shear bolts 16 adjacent to each other in the longitudinal direction at the bottom of the top plate; the second drag rod 17 and the second anti-shear bolts 16 constitute the upper bracket 15.

[0028] In this embodiment, the sub-grouting pipe 8.2 is arranged at a position not more than 100 mm away from the middle partition plate 2.

[0029] In this embodiment, the distance between the end of the first bending section 9.4 and the side wall of the corresponding side of the lower cavity is not greater than 100 mm; the distance between the first bending section 9.4 and the middle partition 2 is not greater than 50 mm.

[0030] In this embodiment, lower U-shaped partitions 12 are arranged in the lower cavity 4 along the longitudinal intervals; the second perforation 6 is located between adjacent lower U-shaped partitions 12 or between the lower U-shaped partition 12 at the end and the end plate of the large-scale divided-chamber closed steel box girder 1; upper U-shaped partitions 13 are arranged in the upper cavity 3 along the longitudinal intervals; the upper U-shaped partitions 13 are arranged vertically corresponding to the lower U-shaped partitions 12; the upper U-shaped partitions 13 are arranged inverted.

[0031] In this embodiment, two of the first monitoring devices 9 are arranged between each two adjacent lower U-shaped partitions 12; the first wire 9.2 of one of the first monitoring devices 9 is disconnected at the location inside the lower cavity 4, and the first bent sections 9.4 on both sides of the circuit break extend to the two top corners near the front lower U-shaped partition 12 respectively; when the concrete is poured to the two top corners on the front side of the lower cavity 4, the corresponding two ends of the first bent sections 9.4 are connected to form a loop, so that the first indicator 9.3 on the circuit has an indication. The first wire 9.2 of the other first monitoring device 9 is disconnected at the location inside the lower cavity 4, and the first bent sections 9.4 on both sides of the circuit break extend to the two top corners near the rear lower U-shaped partition 12 respectively; when the concrete is poured to the two top corners on the rear side of the lower cavity 4, the corresponding two ends of the first bent sections 9.4 are connected to form a loop, so that the first indicator 9.3 on the circuit has an indication.

[0032] In this embodiment, a second monitoring device 14 is also included; the second monitoring device 14 includes a second power supply 14.1, a second electric wire 14.2 and a second indicator 14.3; the second power supply 14.1 and the second indicator 14.3 are arranged on the top of the large-scale divided cavity closed steel box girder 1, and the second power supply 14.1 and the second indicator 14.3 are connected in series to form a circuit through the second electric wire 14.2; an upper bracket 15 is arranged on the top and the side walls of the upper cavity 3; the lower part of the second electric wire 14.2 extends into the upper cavity 3, close to the top plate position of the large-scale divided cavity closed steel box girder 1, and the second electric wire 14.2 is disconnected at the position inside the upper cavity 3; the electric wires on both sides of the circuit break are horizontally bent to the left and right sides respectively to form a second bending section 14.4, and the second bending section 14.4 is laid on the upper bracket 15 close to the top plate position; the end of the second bending section 14.4 extends to the position close to the left and right side walls of the large-scale divided cavity closed steel box girder 1.

[0033] In this embodiment, two second monitoring devices 14 are arranged between each two adjacent upper U-shaped partitions 13; the second wire 14.2 of one of the second monitoring devices 14 is disconnected at the position located in the upper cavity 3, and the second bent sections 14.4 on both sides of the circuit break are respectively extended to the two vertices near the front upper U-shaped partition 13; when the concrete is poured to the two vertices on the front side of the upper cavity 3, the corresponding two second bent sections 14.4 ends are connected to form a loop, so that the second indicator 14.3 on the circuit has an indication. The second wire 14.2 of the other second monitoring device 14 is disconnected at the position located in the upper cavity 3, and the second bent sections 14.4 on both sides of the circuit break are respectively extended to the two vertices near the rear upper U-shaped partition 13; when the concrete is poured to the two vertices on the rear side of the upper cavity 3, the corresponding two second bent sections 14.4 ends are connected to form a loop, so that the second indicator 14.3 on the circuit has an indication.

[0034] The visual detection method of the concrete pouring system of the large-scale divided-cavity closed steel box girder includes the following steps.

[0035] Step 1: Connect the surrounding side plates and the bottom plate of the large-scale divided-chamber closed steel box girder 1 to form a rectangular three-dimensional structure without a top cover.

[0036] Step 2: Make the middle partition 2 and install the lower bracket 7.

[0037] Step three, pass the first electric wire 9.2 and the grouting device 8 through the second through-hole 6, and bend the lower ends of the electric wire horizontally to form a first bending section 9.4; then lay the first bending section 9.4 on the lower bracket 7, and make the end of the first bending section 9.4 close to the corner of the side plate corresponding to the middle partition plate 2 and the large-chambered closed steel box girder 1.

[0038] Step 4, installing the middle partition 2: connecting the sides of the middle partition 2 to the side plates of the large-scale compartment-enclosed steel box girder 1; Step five: pass the upper end of the first electric wire 9.2 and the upper end of the grouting device 8 through the first through-hole 5 on the top plate respectively.

[0039] Step 6: Seal the top panel to the top of the surrounding side panels.

[0040] Step seven, connecting the first power source 9.1 and the first indicator 9.3 in series via the first wire 9.2.

[0041] Step eight, pouring concrete, using the theoretical calculated volume to control the pouring volume, when the calculated volume of concrete is reached or the pouring device can no longer pour concrete, the grouting material is injected into the cavity through the grouting pump 8.3 under pressure, and the first indicator 9.3 is observed at the same time to determine whether the concrete has reached the designed height. When the first indicator 9.3 shows on, it can be proved that the concrete has reached the required design height and the large-scale divided chamber closed steel box girder 1 has reached a full state.

[0042] Step nine, continue pouring concrete until concrete overflows from the first perforation 5, and the construction is now completed.

[0043] In this embodiment, when the grouting device 8 includes a main grouting pipe 8.1, branch grouting pipes 8.2 and a grouting pump 8.3, in step three, two branch grouting pipes 8.2 are horizontally laid on the lower bracket 7.

[0044] In this embodiment, when the first indicator 9.3 shows that the circuit is not connected, the grouting pump continues to be used to inject grout into the corresponding cavity until the circuit is connected.

[0045] In this embodiment, when the concrete pouring system includes the second monitoring device 14, the second electric wire 14.2 is installed in the upper cavity 3 between step 4 and step 5; the upper end of the second electric wire 14.2 and the upper end of the grouting device 8 are first passed through the first through hole 5 on the top plate correspondingly; after the top plate is sealed on the top of the surrounding side plates, the second power supply 14.1 and the second indicator 14.3 are connected in series through the second electric wire 14.2.

[0046] In this embodiment, upper vertical partitions 16 are respectively arranged at intervals along the longitudinal direction on the left and right sides of the upper cavity 3 ; lower vertical partitions 17 are respectively arranged at intervals along the longitudinal direction on the left and right sides of the lower cavity 4 .

[0047] In this embodiment, the first indicator 9.3 and the second indicator 14.3 are LED indicator lights or display screens.

[0048] In this embodiment, the grouting material level rises, and the conductivity of the concrete grouting material is used to connect the current circuit of the first monitoring device 9, and the first indicator 9.3 shows that it is connected, which can prove that the concrete has reached the design required height and the lower cavity of the box girder has reached a full state, thereby ensuring that the pouring quality meets the design requirements.

[0049] The above embodiments are not exhaustive of specific implementation methods, and there may be other embodiments. The above embodiments are intended to illustrate the present invention rather than to limit the protection scope of the present invention. All applications derived from simple variations of the present invention fall within the protection scope of the present invention.

Claims

1. A concrete pouring system for a large-scale divided-cavity closed steel box girder, the large-scale divided-cavity closed steel box girder (1) comprising a rectangular three-dimensional structure surrounded by a bottom plate, four side plates and a top plate; a middle partition plate (2) is arranged inside the rectangular three-dimensional structure along the longitudinal length; the middle partition plate (2) divides the internal space of the rectangular three-dimensional structure into an upper cavity (3) and a lower cavity (4); the characteristics are: A lower bracket (7) is provided on the top and side walls of the lower cavity (4); a first through hole (5) is provided on the top plate of the large-scale compartmentalized closed steel box girder (1) along the longitudinal interval, and a second through hole (6) is provided on the middle partition plate (2) at a position corresponding to the first through hole (5); the concrete pouring system comprises a grouting device (8) and a first monitoring device (9); the grouting device (8) has a group and is arranged along the longitudinal interval, and the grouting device (8) is provided corresponding to the first through hole (5); the grouting device (8) is penetrated in the first through hole (5) and the second through hole (6) to pour concrete into the lower cavity (4); The first monitoring devices (9) are arranged in a group and spaced apart in the longitudinal direction, and the first monitoring devices (9) are arranged corresponding to the first perforations (5); the first monitoring devices (9) include a first power source (9.1), a first wire (9.2) and a first indicator (9.3); the first power source (9.1) and the first indicator (9.3) are arranged on the top of the large-scale divided chamber closed steel box girder (1), and the first power source (9.1) and the first indicator (9.3) are connected in series through the first wire (9.2) to form an electric The circuit is provided with a first conductive wire (9.2); the lower portion of the first conductive wire (9.2) extends into the lower cavity (4) near the middle partition (2), and the first conductive wire (9.2) is disconnected at a position located in the lower cavity (4); the conductive wires on both sides of the circuit break are horizontally bent to the left and right sides respectively to form a first bent section (9.4), and the first bent section (9.4) is laid on a lower bracket (7) near the middle partition (2); the ends of the first bent sections (9.4) on both sides extend to the top corners near the left and right sides of the lower cavity (4).

2. The concrete pouring system for a large-scale divided-cavity closed steel box girder according to claim 1 is characterized in that: The grouting device (8) comprises a main grouting pipe (8.1), branch grouting pipes (8.2) and a grouting pump (8.3); the main grouting pipe (8.1) is arranged in the first perforation (5), and the lower end of the main grouting pipe (8.1) passes through the second perforation (6) and extends into the lower cavity (4), and the upper end of the main grouting pipe (8.1) is connected to the grouting pump (8.3); the lower end of the main grouting pipe (8.1) is divided into two branch grouting pipes (8.2), and the two branch grouting pipes (8.2) are horizontally arranged on the left and right sides of the main grouting pipe (8.1); the branch grouting pipes (8.2) are laid on a bracket.

3. The concrete pouring system for a large-scale closed steel box girder with divided chambers according to claim 1 is characterized in that: First anti-shear bolts (10) are respectively arranged on the bottom surface of the middle partition (2) at the top of the lower cavity (4) and on the side walls around the lower cavity (4); first drag rods (11) are connected between the ends of the first anti-shear bolts (10) adjacent to each other in the transverse direction and between the first anti-shear bolts (10) adjacent to each other in the longitudinal direction at the bottom of the middle partition (2); the first drag rods (11) and the first anti-shear bolts (10) constitute the lower bracket (7).

4. The concrete pouring system for a large-scale closed steel box girder with divided chambers according to claim 2 is characterized in that: The sub-grouting pipe (8.2) is arranged at a position no more than 100 mm away from the middle partition plate (2).

5. The concrete pouring system for a large-scale closed steel box girder with divided chambers according to claim 2 is characterized in that: The distance between the end of the first bent section (9.4) and the side wall on the corresponding side of the lower cavity is no greater than 100 mm; and the distance between the first bent section (9.4) and the middle partition (2) is no greater than 50 mm.

6. The concrete pouring system for a large-scale closed steel box girder with divided chambers according to claim 1 is characterized in that: Lower U-shaped partitions (12) are arranged in the lower cavity (4) along the longitudinal interval; the second through hole (6) is located between adjacent lower U-shaped partitions (12) or between the lower U-shaped partition (12) at the end and the end plate of the large-scale divided cavity closed steel box girder (1); upper U-shaped partitions (13) are arranged in the upper cavity (3) along the longitudinal interval; the upper U-shaped partitions (13) and the lower U-shaped partitions (12) are arranged vertically correspondingly.

7. The concrete pouring system for a large-scale closed steel box girder with divided chambers according to claim 1 is characterized in that: The invention also comprises a second monitoring device (14); the second monitoring device (14) comprises a second power source (14.1), a second electric wire (14.2) and a second indicator (14.3); the second power source (14.1) and the second indicator (14.3) are arranged on the top of the large-scale divided cavity closed steel box girder (1), and the second power source (14.1) and the second indicator (14.3) are connected in series to form a circuit through the second electric wire (14.2); upper brackets (15) are arranged on the top and the side walls of both sides of the upper cavity (3); The lower portion of the second electric wire (14.2) extends into the upper cavity (3) near the top plate of the large-sized divided cavity enclosed steel box girder (1), and the second electric wire (14.2) is disconnected at a position located in the upper cavity (3); the electric wires on both sides of the circuit break are horizontally bent to the left and right sides respectively to form a second bent section (14.4), and the second bent section (14.4) is laid on an upper bracket (15) near the top plate; the ends of the second bent section (14.4) extend to positions near the left and right side walls of the large-sized divided cavity enclosed steel box girder (1).

8. A visual detection method for a concrete pouring system of a large-scale compartmentalized closed steel box girder as claimed in any one of claims 1 to 7, characterized in that: The steps include: Step 1: Connect the side plates and the bottom plate of the large-scale compartment-enclosed steel box girder (1) to form a rectangular three-dimensional structure without a top cover; Step 2: making a middle partition (2) and installing a lower bracket (7); Step three, inserting the first electric wire (9.2) and the grouting device (8) into the second through hole (6), and horizontally bending the lower ends of the electric wire to form a first bent section (9.4); then laying the first bent section (9.4) on the lower bracket (7), and making the end of the first bent section (9.4) close to the corner of the side plate corresponding to the middle partition plate (2) and the large-scale compartment-enclosed steel box girder (1); Step 4, installing the middle partition (2): connecting the sides of the middle partition (2) to the side panels of the large-scale compartment-enclosed steel box girder (1) accordingly; Step 5, passing the upper end of the first electric wire (9.2) and the upper end of the grouting device (8) through the first through hole (5) on the top plate respectively; Step 6: seal the top plate to the top of the surrounding side plates; Step seven, connecting the first power source (9.1) and the first indicator (9.3) in series via the first electric wire (9.2); Step eight, pouring concrete, using the theoretical calculated volume to control the pouring volume, when the calculated volume of concrete is reached or the pouring device can no longer pour concrete, injecting the grouting material into the cavity through the grouting pump (8.3) under pressure, and observing the first indicator (9.3) at the same time to determine whether the concrete has reached the designed height. When the first indicator (9.3) shows "on", it can be proved that the concrete has reached the required designed height and the large-scale compartment sealed steel box girder (1) has reached a full state; Step nine, continue pouring concrete until concrete overflows from the first perforation (5), and the construction is completed.

9. The visual detection method for the concrete pouring system of a large-scale divided-cavity closed steel box girder according to claim 8 is characterized in that: When the grouting device (8) includes a main grouting pipe (8.1), branch grouting pipes (8.2) and a grouting pump (8.3), in step three, two branch grouting pipes (8.2) are horizontally laid on the lower bracket (7).

10. The visual detection method for the concrete pouring system of a large-scale divided-cavity closed steel box girder according to claim 8, characterized in that: When the concrete pouring system includes a second monitoring device (14), a second electric wire (14.2) is installed in the upper cavity (3) between step 4 and step 5; the upper end of the second electric wire (14.2) and the upper end of the grouting device (8) are first passed through the first through hole (5) on the top plate correspondingly; after the top plate is sealed on the top of the surrounding side plates, the second power supply (14.1) and the second indicator (14.3) are connected in series through the second electric wire (14.2).

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