A construction system and method suitable for large volume confined space concrete pouring

Abstract

The application discloses a construction system and method suitable for large-volume confined position concrete pouring, and the construction system comprises a distribution system and a material preparation system, the distribution system comprises a walking structure, a lifting mechanism, a feeding mechanism and a distribution mechanism, the lifting mechanism is arranged on the walking structure, and the feeding mechanism and the distribution mechanism are hingedly connected with a connecting base arranged on the top of the lifting mechanism; the material preparation system comprises a material preparation groove, a discharging platform and a feeding platform, the discharging platform is a passing platform for a concrete transport vehicle to pour concrete into the material preparation groove, and the feeding platform is a lifting platform for an excavator to dig the concrete in the material preparation groove into a feeding hopper, the feeding hopper is arranged above a feeding end of the feeding mechanism of a crawler-type distribution machine, and the construction system is used for construction, which can not only meet the conveying of three-stage mixed concrete, but also can improve the distribution height, solves the problems of material preparation and distribution during the large-volume confined position concrete pouring, improves the construction efficiency and reduces the construction cost.

Description

Technical Field

[0001] This invention relates to the field of concrete construction technology, and in particular to a construction system and method suitable for pouring large-volume confined concrete. Background Technology

[0002] In the construction of large-scale water conservancy projects and dams, graded concrete (with aggregate particle size generally 5-80mm) is widely used due to its good compressive strength and temperature control characteristics. However, graded concrete has poor pumpability, which means it cannot be directly pumped into the formwork. During the construction of the Laomukong Ship Lock project on the Minjiang River (the overall height of the upper lock head is 31.5m, and the planar dimensions are 55m*18m), according to the overall progress plan of the Laomukong right bank project, the ship lock and the civil engineering of the adjacent power plant on the left bank were basically carried out simultaneously, which led to the ship lock construction... Concrete pouring for the left pier of the upper gate is restricted (there are no conditions to set up an equipment placement platform behind the left pier wall of the upper gate), so the traditional concrete placement method cannot be used, namely, filling a platform behind the left pier or directly leveling the site and using excavators, concrete placing booms, or a combination of concrete placing booms and 150T crawler cranes equipped with lifting tanks. None of these methods can cover the area 15m below the top of the left pier of the upper gate (although a 500T crawler crane can reach this height, it will significantly increase the construction cost).

[0003] Therefore, while meeting the requirements for conveying three-grade concrete, how to increase the placement height, improve construction efficiency, reduce construction costs, and how to prepare materials for concrete pouring in such large-volume, limited-compartment spaces have become the key issues in concrete construction for this type of project. Summary of the Invention

[0004] One of the objectives of this invention is, at least, to provide a construction system and method suitable for pouring concrete in large-volume confined spaces, addressing the problems existing in the prior art. This system not only meets the requirements for conveying three-grade concrete but also increases the placement height, solving the problems of material preparation and placement during the pouring of concrete in large-volume confined spaces, thereby improving construction efficiency and reducing construction costs.

[0005] To achieve the above objectives, the technical solution adopted by the present invention includes the following aspects.

[0006] A construction system suitable for large-volume confined space concrete pouring includes: a concrete placement system and a material preparation system. The concrete placement system includes a traveling structure, a lifting mechanism, a feeding mechanism, and a placing mechanism. The lifting mechanism is mounted on the traveling mechanism, and the feeding mechanism and the placing mechanism are both hinged to a connecting base mounted on top of the lifting mechanism. The material preparation system includes a material preparation trough, an unloading platform, and a feeding platform. The unloading platform is a passageway for concrete trucks to unload concrete into the material preparation trough. The feeding platform is a lifting platform for an excavator to dig concrete from the material preparation trough into a feeding hopper. The feeding hopper is mounted above the feeding end of the feeding mechanism of the tracked concrete placement machine.

[0007] Preferably, the walking mechanism includes a tracked chassis and a counterweight. A slewing bearing is provided on the top of the tracked chassis, and an upper support frame is provided on the slewing bearing. The counterweight is located at the rear of the tracked chassis and is positioned opposite to the fabric placing mechanism.

[0008] Preferably, the lifting mechanism includes an inner frame, an outer frame, a lifting cylinder, and a variable angle cylinder. The inner frame is fixedly connected to the upper support frame, and the outer frame is fitted over the inner frame. The two ends of the lifting cylinder are connected to the inner frame and the outer frame respectively, and are located inside the two. The extension and retraction of the lifting cylinder causes the outer frame to rise and fall with the inner frame as a guide rail. Two variable angle cylinders are arranged between the outer frame and the fabric feeding mechanism. One end of the variable angle cylinder is hinged to the outer frame and is located in the middle of the outer frame near the fabric feeding mechanism. The other end of the variable angle cylinder is hinged to the fabric feeding mechanism and is located at the bottom of the first section of the fabric feeding mechanism. The fabric feeding mechanism is a telescopic fabric belt frame.

[0009] Preferably, a guide assembly is welded to the inner side of the outer jacket; a balance arm is provided in the middle of the outer jacket on the side away from the fabric mechanism, and a counterweight is provided at the tail of the balance arm.

[0010] Preferably, the connecting base is located on the top of the outer frame. The connecting base includes a fixed bracket and a small support frame connected by a small turntable. The lower leg structure of the fixed bracket is welded to the outer frame, and the upper part of the fixed bracket is hinged to the root of the fabric mechanism. The small turntable allows the small support frame to rotate. The upper part of the small support frame is hinged to the feeding mechanism, and a receiving groove is provided on the inner side of the small support frame.

[0011] Preferably, the material preparation trough, unloading platform and loading platform are arranged on the ground and the heights of the three are adapted to each other. The material preparation trough is a rigid cubic structure with an opening at the top. The unloading platform and loading platform are located on both sides of the material preparation trough. The sections of the unloading platform and loading platform away from the material preparation trough (1) are respectively the slope section and the slope section ´, and the sections close to the material preparation trough are respectively the plane section and the plane section ´.

[0012] Preferably, both the unloading platform and the loading platform are provided with two rows of threaded steel bars at their tops; the unloading platform is also provided with a limiting plate at its top, which is located near the right end of the unloading platform, which is the end closest to the material preparation trough, and the side of the limiting plate away from the right end of the unloading platform is an arc shape that is concave inward toward the right end of the unloading platform; multiple baffles are provided along the length of the unloading platform on both sides.

[0013] Preferably, the unloading platform further includes an extended planar section that is detachably connected to the planar section via connecting bolts. The extended planar section and the planar section are provided with a connector at one end that is close to each other. The connector has two rows of connecting holes for installing connecting bolts.

[0014] Preferably, the material preparation trough is arranged in a groove excavated in the ground, the groove being adapted to the size of the material preparation trough, or the groove can be directly used as the material preparation trough, and the inner wall and bottom of the groove are filled with concrete; the unloading platform and the loading platform are both on the ground.

[0015] A construction method suitable for pouring large-volume confined space concrete, when using the above-mentioned construction system suitable for pouring large-volume confined space concrete, includes the following steps: Step 1: The construction system is in place. The material placement system is arranged according to the construction point, and the material preparation system is placed near the feeding end of the material placement system's feeding mechanism. Step 2: Place the feeding hopper above the feeding end of the feeding mechanism; Step 3: According to the construction schedule, use concrete trucks to unload the concrete into the material preparation tank; Step 4: Use an excavator to dig the concrete from the preparation trough into the loading hopper; Step 5: The material is transferred to the placing mechanism for pouring through the feeding mechanism. Before pouring, the working height of the self-elevating placing machine is adjusted through the lifting mechanism according to the material placement height requirements. During pouring, the material placement speed is adjusted according to the pouring progress of the silo surface, and the angle of the placing mechanism is adjusted through the lifting mechanism.

[0016] In summary, by adopting the above technical solution, the present invention has at least the following beneficial effects: 1. Using this construction system can not only meet the transportation of three-grade concrete, but also increase the placement height, solving the problems of material preparation and placement when pouring large-volume, limited-position concrete, thus improving construction efficiency and reducing construction costs; 2. The lifting and lowering of the outer frame is achieved by the extension and retraction of the lifting cylinder, thus meeting the requirements for concrete placement at different heights. The guide component arranged inside the vertical lifting component plays a guiding role and resists lateral pressure. When the outer frame is lifted and lowered, the inner frame acts as a guide rail and resists unbalanced torque. The extension and retraction of the variable angle cylinder realizes the adjustment of the angle of the placing mechanism. The upper support frame rotates around the central axis of the slewing bearing, so that the lifting mechanism and the above structure rotate as a whole, thus meeting the requirements for concrete placement in different directions. The balance of the crawler concrete placing machine is achieved by the counterweight and counterweight blocks. The rotation of the small support frame allows for fine adjustment of the feeding mechanism, reducing the deviation when the feeding mechanism discharges material. 3. The material preparation system uses the unloading platform as a passageway for concrete trucks to unload concrete into the material preparation trough, and the loading platform as a lifting platform for excavators to dig concrete from the material preparation trough into the loading hopper. This solves the problem that three-grade concrete cannot be directly pumped into the trough due to its poor pumpability when pouring concrete in large-volume, limited-compartment concrete. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the fabric system according to an exemplary embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the material preparation system according to an exemplary embodiment of the present invention.

[0019] Figure 3 This is a structural diagram showing the relative positions of the feeding hopper and the feeding mechanism.

[0020] Figure 4 This is a structural diagram showing the relative positions of the lifting mechanism, the traveling mechanism, and the cloth-laying mechanism.

[0021] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0022] Figure 6 for Figure 1 Enlarged diagram of point B in the middle.

[0023] Figure 7 This is an elevation view of the unloading platform.

[0024] Figure 8 This is a plan view of the unloading platform.

[0025] Figure 9 This is a schematic diagram of the baffle arrangement.

[0026] Figure 10 This is an elevation view of the material loading platform.

[0027] Figure 11 This is a floor plan of the loading platform.

[0028] Figure 12 This is another elevation view of the unloading platform.

[0029] Figure 13 This is the elevation view of the extended plan section.

[0030] Figure 14 for Figure 12 Enlarged diagram of point C in the middle.

[0031] Figure 15 This is a structural schematic diagram of the connector.

[0032] In the diagram, the markings are as follows: 1-Traveling structure, 101-Crawler chassis, 102-Counterweight, 103-Slewing bearing, 104-Upper support frame, 2-Lifting mechanism, 21-Inner frame, 22-Outer frame, 23-Lifting cylinder, 24-Angle cylinder, 25-Balance boom, 26-Tie rod, 27-Counterweight block, 28-Guide assembly, 3-Loading mechanism, 4-Packing mechanism, 5-Connecting base, 51-Fixed bracket, 52-Small support frame, 6-Material trough, 7-Unloading platform, 71-Lower cross brace, 72-Vertical brace, 73-Upper cross brace, 74-Main panel, 75- - Longitudinal connecting bar, 76- Limiting plate, 77- Anti-slip reinforcing bar, 78- Baffle, 79- First lifting lug, 701- Lower horizontal brace, 702- Vertical brace, 703- Upper horizontal brace, 704- Main panel, 705- Longitudinal connecting bar, 706- Anti-slip reinforcing bar, 707- Third lifting lug, 708- Connector, 8- Loading platform, 81- Lower horizontal brace, 82- Vertical brace, 83- Upper horizontal brace, 84- Main panel, 85- Longitudinal connecting bar, 86- Anti-slip reinforcing bar, 87- Second lifting lug, 9- Loading hopper, 10- Small turntable. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so that the objectives, technical solutions, and advantages of the present invention will be clearer. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0034] In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. Example 1

[0035] This embodiment provides a construction system suitable for large-volume, confined-position concrete pouring, referencing... Figures 1-3 The construction system applicable to large-volume confined space concrete pouring includes a concrete placement system and a material preparation system. The concrete placement system includes a traveling structure 1, a lifting mechanism 2, a feeding mechanism 3, and a concrete placement mechanism 4. The lifting mechanism 2 is mounted on the traveling mechanism 1. The feeding mechanism 3 and the concrete placement mechanism 4 are both hinged to the connecting base 5 mounted on the top of the lifting mechanism 2. The material preparation system includes a material preparation trough 6, an unloading platform 7, and a feeding platform 8. The unloading platform 7 is a passageway for concrete trucks to unload concrete into the material preparation trough 6. The feeding platform 8 is a lifting platform for excavators to dig concrete from the material preparation trough 6 into the feeding hopper 9. The feeding hopper 9 is mounted above the feeding end of the feeding mechanism 3 of the tracked concrete placement machine.

[0036] refer to Figure 1 and Figure 4 The traveling mechanism 1 includes a tracked chassis 101 and a counterweight 102. The tracked chassis 101 serves as the core load-bearing and moving component of the tracked concrete placing boom. A slewing bearing 103 is mounted on the top of the tracked chassis 101. The slewing bearing 103 includes an outer ring and an inner ring. The outer ring of the slewing bearing 103 is connected to the tracked chassis 101 by a first high-strength bolt (a bolt with a tensile strength greater than 8.8, such as grade 12.9). An upper support frame 104 is mounted on the slewing bearing 103. The upper support frame 104 is connected to the inner ring of the slewing bearing 103 by a second high-strength bolt (a bolt with a tensile strength greater than 8.8, such as grade 12.9). Symmetrically arranged on the upper support frame 104 are the same as those on the slewing bearing. The double slewing reduction gear (not shown in the figure) is engaged with the outer ring of bearing 103. The double slewing reduction gear rotates under the drive of the power unit and the control of the control unit (the power unit is the power source of the concrete placing boom, and the control unit is used to control the concrete placing boom to achieve various operations). This causes the upper support frame 104 to rotate around the central axis of the slewing bearing 103. The rotation of the upper support frame 104 causes the lifting mechanism 2 and the above structures to rotate as a whole, thereby satisfying the concrete placing in different directions. The counterweight 102 is set at the tail of the tracked chassis 101 and is set opposite to the placing mechanism 4 (located on the side of the lifting mechanism 2 away from the placing mechanism 4). The counterweight 102 is used to achieve the balance of the entire tracked concrete placing boom.

[0037] refer to Figure 4The lifting mechanism 2 is mounted on the upper support frame 104 located on the tracked chassis 101. The lifting mechanism 2 includes an inner frame 21, an outer frame 22, a lifting cylinder 23, and a variable angle cylinder 24. The inner frame 21 and the outer frame 22 are both rigid frames with an integral rectangular structure. The inner frame 21 is mounted on the upper support frame 104 and is fixedly connected to the upper support frame 104 by a first pin (e.g., a pin with a diameter of 60mm). The outer frame 22 is fitted outside the inner frame 21. The lifting cylinder 23 is located inside the inner frame 21 and the outer frame 22, and both ends of the lifting cylinder 23 are connected to the inner frame 21 and the outer frame 22, respectively. The extension and retraction of the lifting cylinder 23 causes the outer frame 22 to rise and fall with the inner frame 21 as a guide rail, thereby meeting the requirements for concrete placement at different heights. A guide assembly 28 (see reference) is welded to the inner side of the outer frame 22. Figure 5 When the outer frame 22 is raised or lowered, the guide assembly 28 serves to guide and resist lateral pressure; the two variable angle cylinders 24 are arranged between the outer frame 22 and the fabric mechanism 4. One end of the variable angle cylinder 24 is hinged to the outer frame 22 and is located in the middle of the outer frame 22 near the fabric mechanism. The other end of the variable angle cylinder 24 is hinged to the fabric mechanism 4 and is located at the bottom of the first section of the fabric mechanism 4. The fabric mechanism 4 is a telescopic fabric belt frame (in this embodiment, 3 sections are used as an example, and the fabric radius can reach 60m); the outer... A balance boom 25 is provided in the middle of the side of the sleeve frame 22 away from the cloth-laying mechanism 4. One end of the balance boom 25 is connected to the outer sleeve frame 22 by a third high-strength bolt. The balance boom 25 is also fixed to the outer sleeve frame 22 by a tie rod 26. A counterweight 27 is provided at the tail of the balance boom 25. The counterweight 27 is used not only to balance the cloth-laying mechanism 4, but also to balance the whole machine. When operating at high elevation angles and with a long boom extension, the counterweight 27 and the counterweight 102 can effectively counteract the overturning moment and ensure the stability of the whole machine.

[0038] refer to Figure 1 and Figure 6 The connecting base 5 is located on the top of the outer frame 22. The connecting base 5 includes a fixed bracket 51 and a small support frame 52 connected by a small turntable 10. The lower leg structure of the fixed bracket 51 is welded to the outer frame 22. The upper part of the fixed bracket 51 is hinged to the root of the fabric mechanism 4. The small turntable 10 is located on the top of the fixed bracket 51. The small turntable 10 includes an inner ring and an outer ring. The outer ring of the small turntable 10 is connected to the fixed bracket 51 by a fourth high-strength bolt. The inner ring of the small turntable 10 is connected to the small support frame 52 by a fifth high-strength bolt. A reducer (not shown in the figure) is provided on the small support frame 52. The output shaft of the reducer is meshed with the outer ring of the small turntable 10. The reducer rotates under the drive of the power device and the control of the control device, causing the small support frame 52 to rotate. The upper part of the small support frame 52 is hinged to the feeding mechanism 3. A receiving groove is provided on the inner side of the small support frame 52.

[0039] The material preparation trough 6, unloading platform 7, and loading platform 8 are arranged on the ground, and their heights are adapted to each other. The material preparation trough 6 is a rigid cubic structure with an open top (dimensions such as 4m long * 3m wide * 1m high). The unloading platform 7 and loading platform 8 are located on both sides of the material preparation trough 6 (preferably facing each other). The sections of the unloading platform 7 and loading platform 8 away from the material preparation trough 6 are respectively a slope section and a slope section ', and the sections of the unloading platform 7 and loading platform 8 close to the material preparation trough 6 are respectively a flat section and a flat section '. In this embodiment, the unloading platform 7 has an overall length of 8m and a width of 3m, and the loading platform 8 has an overall length of 7m and a width of 3.5m as an example. The length of the flat section is 2m, and the length of the flat section ' is 5m. In actual use, the excavator is positioned on the flat section ' of the loading platform 8 to dig material.

[0040] refer to Figure 2 , Figure 7 and Figure 8The unloading platform 7 includes a lower horizontal brace 71, a vertical brace 72, an upper horizontal brace 73, and a main panel 74. The lower horizontal brace 71, vertical brace 72, and upper horizontal brace 73 are all made of I-beams. The two flanges of the lower horizontal brace 71 and upper horizontal brace 73 are arranged vertically, while the two flanges of the vertical brace 72 are arranged horizontally. The main panel 24 is made of patterned steel plate (e.g., 8mm thick patterned steel plate). Multiple lower horizontal braces 71 are arranged side-by-side along the width of the unloading platform 7, and their overall width is adapted to the width of the unloading platform 7. They are positioned near the sides of the unloading platform 7. The vertical supports 72 are arranged in a denser configuration; multiple vertical supports 72 are welded side-by-side to the top of the lower horizontal support 71 along its length. The vertical supports 72 in the flat section have the same height, while the vertical supports 72 in the sloping section have an inclined end away from the lower horizontal support 71, and their height is arranged according to the slope of the sloping section. A longitudinal connecting rib 75 is welded to the connection between the vertical support 72 and the lower horizontal support 71, and the length of the longitudinal connecting rib 75 is adapted to the width of the unloading platform 7. Multiple upper horizontal supports 73 are welded side-by-side to the top of the vertical supports 72 along the width of the unloading platform 7, and are connected to the lower horizontal support 71. Each support 71 corresponds to a lower cross brace 71. The upper cross brace 73 is welded to the top of the lower cross brace 71 at one end on the slope section. The main panel 74 is laid on top of the upper cross brace 73. A limiting plate 76 is welded to the top of the main panel 74. The limiting plate 76 is located near the right end of the main panel 74, which is the end closest to the material preparation trough 6. The side of the limiting plate 76 away from the right end of the main panel 74 is an arc shape that curves inward towards the right end of the main panel 74. The limiting plate 76 is used to limit the movement of the concrete transport vehicle. When the concrete transport vehicle unloads into the material preparation trough 6, it reverses. The unloading platform 7 uses a limiting plate 76 to restrict the rear wheels of the concrete transport truck, preventing it from entering the material preparation trough 6. The arc-shaped design reduces or avoids damage to the truck's tires. Two rows of anti-slip reinforcing bars 77 are welded to the top of the main panel 74, located near both sides of the unloading platform 7. Multiple anti-slip reinforcing bars 77 in each row are arranged side-by-side along the length of the main panel 74. The anti-slip reinforcing bars 77 are made of threaded steel bars (e.g., 20mm diameter threaded steel bars arranged at 250mm intervals). (Reference) Figure 9 Several baffles 78 (7-8 baffles) are arranged along the length of the main panel 74 near both sides of the unloading platform 7. The bottom of the baffles 78 is welded to multiple anti-slip steel bars 77. The baffles 78 limit the concrete transport vehicle and prevent the concrete transport vehicle from falling off the unloading platform 7 and overturning. Two first lifting lugs 79 are welded to both sides of the unloading platform 7.

[0041] refer to Figure 1 , Figure 10 and Figure 11The loading platform 8 includes a lower horizontal brace '81', a vertical brace '82', an upper horizontal brace '83', and a main panel '84'. The lower horizontal brace '81', vertical brace '82', and upper horizontal brace '83' are all made of I-beams. The two flanges of the lower horizontal brace '81' and upper horizontal brace '83' are arranged vertically, while the two flanges of the vertical brace '82' are arranged horizontally. The main panel '84' ​​is made of patterned steel plate (e.g., 8mm thick patterned steel plate). Multiple lower horizontal braces '81' are arranged side-by-side along the width of the loading platform 8, with their overall width matching the width of the loading platform 8, and are densely arranged near the sides of the loading platform 8. Multiple vertical braces '82' are welded side-by-side to the top of the lower horizontal brace '81 along its length. The vertical braces '82' located in the flat section ' have the same height, while the vertical braces '82' located in the sloping section ' have an inclined end away from the lower horizontal brace '81, and their height is determined by the slope of the sloping section '. The arrangement includes a longitudinal connecting rib 85 welded to the connection between the vertical support 82 and the lower horizontal support 81, the length of which is adapted to the width of the loading platform 8; multiple upper horizontal supports 83 are welded side-by-side to the top of the vertical support 82 along the width of the loading platform 8, corresponding one-to-one with the lower horizontal supports 81, and one end of the upper horizontal support 83 located on the slope section is also welded to the top of the lower horizontal support 81; the main panel 84 is laid on top of the upper horizontal supports 83, and two rows of anti-slip steel bars 86 are welded to the top of the main panel 84 near both sides of the loading platform 8, with multiple anti-slip steel bars 86 in each row arranged side-by-side along the length of the main panel 84, and the anti-slip steel bars 86 are threaded steel bars (e.g., 20mm diameter threaded steel bars arranged at 250mm intervals); two second ear plates 87 are welded to both sides of the loading platform 8.

[0042] As one preferred embodiment, reference is made to Figures 12-15The unloading platform 7 also includes an extended planar section, which is detachably connected to the planar section by connecting bolts. These connecting bolts are high-strength bolts (bolts with a tensile strength greater than 8.8 grade, such as grade 12.9). The height and width of the extended planar section are the same as those of the planar section. The extended planar section includes a lower horizontal brace ´701, a vertical brace ´702, an upper horizontal brace ´703, and a main panel ´704. The lower horizontal brace ´701, vertical brace ´702, and upper horizontal brace ´703 are all made of I-beams. The two flanges of the lower horizontal brace ´701 and upper horizontal brace ´703 are arranged vertically, while the two flanges of the vertical brace ´702 are arranged horizontally. The main panel ´704 is made of checkered steel plate. Fabrication (e.g., using 8mm thick patterned steel plates): Multiple lower cross braces ´´701 are arranged side-by-side along the width of the extended planar section, with their overall width matching the width of the extended planar section, and are densely arranged near both sides of the extended planar section; Multiple vertical braces ´´702 are welded side-by-side to the top of the lower cross braces ´´701 along the length of the lower cross braces ´´701, and longitudinal connecting ribs ´´705 are welded to the connection between the vertical braces ´´702 and the lower cross braces ´´701, the length of which matches the width of the extended planar section; Multiple upper cross braces ´´703 are welded side-by-side to the top of the vertical braces ´´702 along the width of the extended planar section, and correspond one-to-one with the lower cross braces ´´701. The main panel 704 is laid on top of the upper cross brace 703. Two rows of anti-slip reinforcing bars 706 are welded to the top of the main panel 704, located near both sides of the extended planar section. Multiple anti-slip reinforcing bars 706 in each row are arranged side-by-side along the length of the main panel 704. The anti-slip reinforcing bars 706 are threaded reinforcing bars (e.g., 20mm diameter threaded reinforcing bars arranged at 250mm intervals). Additionally, multiple baffles 78 are arranged along the length of the main panel 704, near both sides of the extended planar section. The bottom of each baffle 78 is welded to multiple anti-slip reinforcing bars 706. The limiting plate 76 is welded to the top of the main panel 704, near the main panel 703. At the end furthest from the planar section, the bottom of the limiting plate 76 is welded to the top of the main panel 704; two third lifting lugs 707 are welded to both sides of the extended planar section; when the extended planar section is connected to the planar section by connecting bolts, a connector 708 is welded to the end of the extended planar section closest to the planar section, and the two connectors 708 are located at the two farthest lower cross braces 701, with two rows of connecting holes for installing connecting bolts on the connectors 708, the two rows of connecting holes being located on both sides of the vertical brace 702; the other two connectors 708 are welded to the end of the planar section closest to the extended planar section, and are located at the two farthest lower cross braces 71, the two rows of connecting holes being located on both sides of the vertical brace 72.

[0043] In practical applications, a groove adapted to the size of the material preparation trough 6 can be excavated on the ground, and the material preparation trough 6 can be arranged in the groove (or the groove can be directly used as the material preparation trough 6, with concrete poured on the inner wall and bottom of the groove). At this time, the unloading platform 7 and the loading platform 8 are both on the ground. The ground serves as a passage platform for concrete transport vehicles to unload concrete into the material preparation trough 6, and also as a lifting platform for excavators to dig concrete from the material preparation trough 6 into the loading hopper 9. Example 2

[0044] This embodiment provides a construction method suitable for large-volume confined space concrete pouring. When using the construction system shown in Embodiment 1, the method includes the following steps: Step 1: The construction system is in place. The material placement system is arranged according to the construction point, and the material preparation system is placed near the feeding end of the feeding mechanism 3 of the material placement system. Step 2: Place the feeding hopper 9 above the feeding end of the feeding mechanism 3; Step 3: According to the construction schedule, use concrete trucks to unload the concrete into the material preparation tank 6; Step 4: Use an excavator to excavate the concrete from the material preparation trough 6 into the feeding hopper 9; Step 5: The material is transferred to the material placement mechanism 4 by the feeding mechanism 3 for pouring. Before pouring, the working height of the self-elevating material placement machine is adjusted by the lifting cylinder 23 of the lifting mechanism 2 according to the material placement height requirements. During pouring, the material placement speed is adjusted according to the pouring progress of the silo surface, and the angle of the material placement mechanism 4 is adjusted by the angle-changing cylinder 24 of the lifting mechanism 2.

[0045] The above description is merely a detailed illustration of specific embodiments of the present invention and is not intended to limit the invention. Various substitutions, modifications, and improvements made by those skilled in the art without departing from the principles and scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction system suitable for large-volume, confined-space concrete pouring, characterized in that, include: The concrete placement system and the material preparation system include a walking structure (1), a lifting mechanism (2), a feeding mechanism (3) and a concrete placement mechanism (4). The lifting mechanism (2) is set on the walking mechanism (1). The feeding mechanism (3) and the concrete placement mechanism (4) are both hinged to the connecting base (5) set on the top of the lifting mechanism (2). The material preparation system includes a material preparation trough (6), an unloading platform (7) and a feeding platform (8). The unloading platform (7) is a passage platform for concrete trucks to unload concrete into the material preparation trough (6). The feeding platform (8) is a lifting platform for excavators to dig concrete from the material preparation trough (6) into the feeding hopper (9). The feeding hopper (9) is set above the feeding end of the feeding mechanism (3) of the tracked concrete placement machine.

2. The construction system for large-volume confined space concrete pouring according to claim 1, characterized in that, The walking mechanism (1) includes a tracked chassis (101) and a counterweight (102). A slewing bearing (103) is provided on the top of the tracked chassis (101), and an upper support frame (104) is provided on the slewing bearing (103). The counterweight (102) is located at the rear of the tracked chassis (101) and is positioned opposite to the fabric distribution mechanism (4).

3. The construction system for large-volume confined space concrete pouring according to claim 2, characterized in that, The lifting mechanism (2) includes an inner frame (21), an outer frame (22), a lifting cylinder (23), and a variable angle cylinder (24). The inner frame (21) is fixedly connected to the upper support frame (104), and the outer frame (22) is sleeved outside the inner frame (21). The two ends of the lifting cylinder (23) are connected to the inner frame (21) and the outer frame (22) respectively, and are located inside the two. The extension and retraction of the lifting cylinder (23) causes the outer frame (22) to be positioned above the inner frame. (21) Lifting and lowering the guide rail; Two variable angle cylinders (24) are set between the outer frame (22) and the fabric mechanism (4). One end of the variable angle cylinder (24) is hinged to the outer frame (22) and located in the middle of the outer frame (22) near the fabric mechanism (4). The other end of the variable angle cylinder (24) is hinged to the fabric mechanism (4) and located at the bottom of the first section of the fabric mechanism (4). The fabric mechanism (4) is a telescopic fabric belt frame.

4. The construction system for large-volume confined space concrete pouring according to claim 3, characterized in that, The inner side of the outer frame (22) is welded with a guide assembly (28); a balance arm (25) is provided in the middle of the side of the outer frame (22) away from the fabric mechanism (4), and a counterweight (27) is provided at the tail of the balance arm (25).

5. The construction system for large-volume confined space concrete pouring according to claim 3, characterized in that, The connecting base (5) is set on the top of the outer frame (22). The connecting base (5) includes a fixed bracket (51) and a small support frame (52) connected by a small turntable (10). The lower leg structure of the fixed bracket (51) is welded to the outer frame (22), and the upper part of the fixed bracket (51) is hinged to the root of the fabric mechanism (4). The small turntable (10) allows the small support frame (52) to rotate. The upper part of the small support frame (52) is hinged to the feeding mechanism (3), and a receiving groove is provided on the inner side of the small support frame (52).

6. The construction system for large-volume confined space concrete pouring according to claim 1, characterized in that, The material preparation trough (1), unloading platform (2) and loading platform (3) are arranged on the ground and their heights are matched. The material preparation trough (1) is a rigid cubic structure with an opening at the top. The unloading platform (2) and loading platform (3) are located on both sides of the material preparation trough (1). The sections of the unloading platform (2) and loading platform (3) away from the material preparation trough (1) are respectively the slope section and the slope section ', and the sections close to the material preparation trough (1) are respectively the flat section and the flat section '.

7. The construction system for large-volume confined space concrete pouring according to claim 6, characterized in that, The top of both the unloading platform (2) and the loading platform (3) is provided with two rows of threaded steel bars; the top of the unloading platform (2) is also provided with a limiting plate (26), which is arranged near the right end of the unloading platform (2). The right end of the unloading platform (2) is the end near the material preparation trough (1), and the side of the limiting plate (26) away from the right end of the unloading platform (2) is an arc shape that is concave towards the right end of the unloading platform (2); multiple baffles (78) are provided on both sides of the unloading platform (7) along the length of the unloading platform (7).

8. The construction system for large-volume confined space concrete pouring according to claim 7, characterized in that, The unloading platform (2) also includes an extended planar section that is detachably connected to the planar section by connecting bolts. A connector (208) is provided at one end of the extended planar section that is close to the planar section. Two rows of connecting holes for installing connecting bolts are provided on the connector (208).

9. The construction system for large-volume confined space concrete pouring according to any one of claims 6 to 8, characterized in that, The material preparation trough (1) is arranged in a groove dug in the ground. The groove is adapted to the size of the material preparation trough (1), or the groove is directly used as the material preparation trough (1). The inner wall and bottom of the groove are filled with concrete. The unloading platform (2) and the loading platform (3) are both on the ground.

10. A construction method suitable for large-volume confined space concrete pouring, characterized in that, When using the construction system for pouring large-volume confined space concrete as described in any one of claims 1-9, the following steps are included: Step 1: The construction system is in place. The material placement system is arranged according to the construction location, and the material preparation system is arranged near the feeding end of the feeding mechanism (3) of the material placement system. Step 2: Place the feeding hopper (9) above the feeding end of the feeding mechanism (3); Step 3: According to the construction schedule, use a concrete transport truck to unload the concrete into the material preparation tank (6); Step 4: Use an excavator to dig the concrete from the preparation trough (6) into the loading hopper (9); Step 5: The material is transferred to the material placement mechanism (4) through the feeding mechanism (3) for pouring. Before pouring, the working height of the self-elevating material placement machine is adjusted through the lifting mechanism (2) according to the material placement height requirements. During pouring, the material placement speed is adjusted according to the pouring progress of the silo surface, and the angle of the material placement mechanism (4) is adjusted through the lifting mechanism (2).

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