An aqueduct cast-in-place support structure and a method for removing a beam support thereof

Abstract

The application discloses an aqueduct cast-in-place support structure, which comprises a bent cap cast on the top of a pier column and a beam support arranged between the bent caps of two adjacent pier columns. The bent cap is provided with a pair of hanging pieces on the left and right sides respectively. Each pair of hanging pieces is arranged on the front and back sides of the bent cap and is fixedly connected through a fixing mechanism. The left and right sides of the hanging piece are respectively provided with a support seat and a mounting seat for mounting a lowering mechanism. The two ends of the beam support are detachably connected to the lower ends of the corresponding hanging pieces. The top of the beam support is provided with a formwork system, and the aqueduct is cast on the formwork system. The two ends of the aqueduct are supported on the bent caps of the two adjacent pier columns and are supported on the support seats of the corresponding hanging pieces. The support seat is supported on the bent cap. The application further discloses a method for dismounting the beam support of the aqueduct cast-in-place support structure. The aqueduct cast-in-place support structure and the method for dismounting the beam support thereof can reduce the loosening of the hanging pieces during the dismounting of the beam support and improve the overall stability.

Description

Technical Field

[0001] This invention relates to the field of aqueduct construction technology, and in particular to a method for removing the cast-in-place support structure and beam supports of an aqueduct. Background Technology

[0002] The existing cast-in-place support for the aqueduct includes a cap beam cast on top of the pier, longitudinal pipes embedded in the cap beam, and a longitudinal frame set between two adjacent cap beams. The longitudinal pipe runs through both sides of the cap beam and is fitted with tie rods extending from both ends of the longitudinal pipe. Hangers are fixed to the corresponding ends of the tie rods on both the front and rear sides of the cap beam. A lifting and adjusting mechanism is installed at the lower end of the hangers. The two ends of the longitudinal frame are respectively set on the lifting and adjusting mechanisms on the corresponding cap beams. A formwork system is installed on the top of the longitudinal frame, which can be adjusted to the formwork height through the lifting and adjusting mechanism. The aqueduct is cast on the formwork system, and the two ends of the aqueduct are supported on the cap beams of two adjacent piers. The unloading process of the cast-in-place support longitudinal frame involves setting up unloading systems (including crossbeams and two hoists) between the two ends of the aqueduct and the two ends of the longitudinal frame. Specifically, the crossbeams are first placed on the top surface of the aqueduct, with both ends extending from the sides of the aqueduct. Hoists are then installed at both ends of the crossbeams and positioned on both sides of the longitudinal frame. After the longitudinal frame is tightened by the unloading system, the connection between the longitudinal frame and the lifting and adjusting mechanism is removed. The longitudinal frame is then lowered a suitable distance by the unloading system to detach the formwork system on the longitudinal frame from the aqueduct, thus achieving demolding. The longitudinal frame is then lowered to the ground by the unloading system, and the longitudinal frame and formwork system are then dismantled.

[0003] In existing cast-in-place supports for aqueducts, one type involves no direct support relationship between the ends of the aqueduct and the hanging components on the top surface of the cap beam. Firstly, during the aqueduct pouring process, before the concrete solidifies, the weight of the middle section of the aqueduct is supported by the formwork system on the lower ends of the corresponding hanging components. This results in a large stress on the lower end of each hanging component, leading to stress imbalance and poor stability. Changes in concrete weight and impact forces cause significant shaking of the formwork system, easily causing the hanging components to loosen. Furthermore, since the aqueduct is poured in sections (the section between two adjacent piers), the hanging components on both sides of the pier are subjected to stress on the lower end of the hanging components on one side (front or rear), further exacerbating the overall stress imbalance and poor stability. Secondly, the hanging components cannot be used during the unloading of the longitudinal frame. During the unloading process, the unloading system needs to be installed on the aqueduct, resulting in high installation costs.

[0004] Another option is to allow the end of the aqueduct to be directly supported by the hanging components on the top surface of the cap beam. However, during the unloading of the longitudinal frame, the weight of the longitudinal frame originally suspended from the lower end of the hanging components on the outside of the cap beam will be added to the hanging components on the top surface of the cap beam. As a result, the hanging components on the top surface of the cap beam will experience increased stress, while the hanging components on the outside of the cap beam will experience reduced stress. Furthermore, since the top surface of the cap beam is generally difficult to flatten during construction, the hanging components on the outside of the cap beam are prone to tilting up and down, which can cause the hanging components to loosen and affect the stability of the overall structure.

[0005] Furthermore, the two ends of the crossbeam are connected to the two sides of the longitudinal frame via a hoist. The crossbeam is stressed at both ends, and the longitudinal frame is prone to swaying during the lowering process, causing uneven stress on both ends of the crossbeam and lateral tilting. If the crossbeam is fixed to the aqueduct, it will not only increase the fixing cost, but also damage the structure of the aqueduct. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a cast-in-place support structure for aqueduct that can reduce the loosening of the hanging parts during the pouring of the aqueduct, reduce the loosening of the hanging parts during the unloading of the beam support, and improve the overall stability.

[0007] A method for unloading beam supports of a cast-in-place aqueduct support structure is also provided to reduce loosening of hanging components during the unloading process and improve overall stability.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A cast-in-place support structure for an aqueduct includes a cap beam cast on top of a pier and a beam support set between the cap beams of two adjacent piers. Each cap beam has a pair of hanging members on its left and right sides. Each pair of hanging members is respectively located on the front and rear sides of the cap beam and is fixedly connected by a fixing mechanism. Each hanging member has a support seat and a mounting seat for installing a lowering mechanism on its left and right sides. The two ends of the beam support are detachably connected to the lower ends of the corresponding hanging members. A formwork system is installed on the top of the beam support, and an aqueduct is cast on the formwork system. The two ends of the aqueduct are respectively supported on the cap beams of two adjacent piers and supported on the support seats of the corresponding hanging members. The support seats are supported on the cap beams.

[0010] As a further improvement to the above technical solution:

[0011] The top of the hanging component is provided with a horizontal hanging part, which is pressed against the top surface of the cap beam.

[0012] A wooden pad is placed between the support base and the aqueduct.

[0013] The fixing mechanism includes a longitudinal pipe and a tie rod. The longitudinal pipe is embedded in the cap beam and runs through the front and rear sides of the cap beam. The tie rod is inserted into the longitudinal pipe, and its two ends extend from the two ends of the longitudinal pipe respectively. Each pair of hanging parts is fixed to the two ends of the corresponding tie rod.

[0014] The two ends of the pull rod are respectively threaded with fixing nuts, and the fixing nuts are pressed against the corresponding hanging parts.

[0015] The lower end of the hanging component is equipped with a lifting and adjusting mechanism, and both ends of the beam support can be detachably connected to the lifting and adjusting mechanism on the corresponding hanging component.

[0016] The lifting and adjusting mechanism includes a screw, an adjusting nut, and a transverse hanging beam. The top end of the screw is fixed to the hanging component, the transverse hanging beam is sleeved on the screw and clamped and fixed by the adjusting nut, and the end of the beam support is placed on the corresponding transverse hanging beam.

[0017] After the top surface of the beam support is provided with transverse distribution beams at intervals along the length direction, the template system is installed on top of each transverse distribution beam.

[0018] A method for removing beam supports of a cast-in-place aqueduct support structure includes the following steps:

[0019] S1. Installation of the lowering mechanism: Install the lowering mechanism on the mounting base of each hanging component at both ends of the beam support, and connect both ends of the beam support to the corresponding lowering mechanism.

[0020] S2. Dismantle the connection between the beam support and the hanging components;

[0021] S3. Demolding: The beam support is lowered a suitable distance by each lowering mechanism, so that the template system on the beam support is separated from the aqueduct, thus achieving demolding;

[0022] S4. Dismantling: Continue to lower the beam supports to the ground through each lowering mechanism, and then dismantle the beam supports and formwork system.

[0023] As a further improvement to the above technical solution:

[0024] The lowering mechanism includes continuous jacks and steel strands. The continuous jacks are mounted on the mounting base and connected to the beam support through the steel strands. The continuous jacks of each lowering mechanism are connected to a control module. In steps S3 and S4, the control module controls each continuous jack to operate synchronously so that the lowering mechanism can be lowered smoothly.

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] The present invention relates to a cast-in-place support structure for aqueducts. Firstly, the aqueduct is supported on support seats for hanging components, and these support seats are supported on a cap beam. During the aqueduct pouring process, although the weight of the middle section of the aqueduct is supported by the formwork system on the lower ends of the corresponding hanging components at both ends, the weight of the two ends of the aqueduct is also supported by the support seats on the cap beam. Thus, for a single hanging component, in addition to the force on its lower end, its support seat is also subjected to pressure from the aqueduct's end, pressing the hanging component tightly between the aqueduct's end and the cap beam, improving the stability of the individual hanging component. Simultaneously, during the pouring process, the weight at both ends and the middle of the aqueduct gradually increases, meaning both the tensile force on the lower end of the hanging component and the upward supporting force (the reverse force of the compressive force on the support seat) increase, resulting in a relatively balanced force distribution on the hanging component and good stability. Furthermore, relative to the hanging component as a whole, the force distribution is more balanced, leading to better overall stability. Secondly, when the beam support is unloaded, the lowering mechanism is installed on the mounting base. On the one hand, this avoids installing the lowering mechanism on the aqueduct, reducing installation costs and damage to the aqueduct structure. On the other hand, during the unloading process, the beam support is lowered by the lowering mechanism installed on the mounting base. The weight of the beam support, which was originally suspended from the lower end of the outer suspension member of the cap beam, is added to the suspension member and the mounting base. This is equivalent to changing the force originally applied by the aqueduct to the lower end of the suspension member and the support base to the force applied to the mounting base and the support base of the suspension member. Since the support base and the mounting base are fixed on the left and right sides of the suspension member respectively, the rotational force on the mounting base and the support base will make the overall force on the suspension member more balanced, reduce the tilting during the descent, thereby reducing the loosening of the suspension member and improving the stability of the overall structure.

[0027] The present invention discloses a method for unloading beam supports of a cast-in-place aqueduct support structure. During the unloading process, a lowering mechanism is installed on a mounting base. This avoids installing the lowering mechanism directly on the aqueduct, reducing installation costs and minimizing damage to the aqueduct structure. Furthermore, during the unloading process, the lowering mechanism, mounted on the mounting base, transfers the weight of the beam support, originally suspended from the lower end of the outer hanging member of the cap beam, to the hanging member and the mounting base. This effectively changes the force originally applied by the aqueduct to the lower end of the hanging member and the support base to the force applied to the mounting base and the support base. Since the support base and the mounting base are fixed to the left and right sides of the hanging member respectively, the rotational force on the mounting base and the support base makes the overall force on the hanging member more balanced, reducing wobbling during descent and thus reducing loosening of the hanging member, thereby improving the overall structural stability. Attached Figure Description

[0028] Figure 1 This is a side view schematic diagram of the cast-in-place support structure for the aqueduct of the present invention.

[0029] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0030] Figure 3This is a schematic diagram of the main structure of the cast-in-place support structure for the aqueduct of the present invention.

[0031] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0032] Figure 5 This is a right-side structural schematic diagram of the hanging components of the cast-in-place support structure for the aqueduct of the present invention.

[0033] Figure 6 This is a left-side structural schematic diagram of the hanging components of the cast-in-place support structure for the aqueduct of the present invention.

[0034] Figure 7 This is a side view of the beam support structure of the cast-in-place support structure for the aqueduct of the present invention during its lowering.

[0035] Figure 8 This is a front view schematic diagram of the beam support structure of the cast-in-place support structure of the aqueduct of the present invention during its lowering.

[0036] The labels in the diagram represent:

[0037] 1. Cap beam; 11. Pier column; 2. Hanging component; 21. Support seat; 22. Mounting seat; 23. Horizontal hanging part; 3. Beam support; 31. Transverse distribution beam; 4. Fixing mechanism; 41. Longitudinal pipe; 42. Tie rod; 43. Fixing nut; 5. Formwork system; 6. Aqueduct; 7. Lowering mechanism; 71. Continuous jack; 72. Steel strand; 73. Control module; 8. Pad; 9. Lifting and adjusting mechanism; 91. Screw; 92. Adjusting nut; 93. Transverse hanging beam. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] Example 1:

[0043] Figures 1 to 6 This invention illustrates an embodiment of the cast-in-place support structure for an aqueduct. The structure includes a cap beam 1 cast on the top of a pier 11 and a beam support 3 positioned between the cap beams 1 of two adjacent piers 11. A pair of hanging members 2 are provided on the left and right sides of the cap beam 1, respectively. Each pair of hanging members 2 is positioned on the front and rear sides of the cap beam 1 and is fixedly connected by a fixing mechanism 4. Support seats 21 and mounting seats 22 for installing a lowering mechanism 7 are provided on the left and right sides of the hanging members 2, respectively. The two ends of the beam support 3 are detachably connected to the lower ends of the corresponding hanging members 2. A template system 5 is installed on the top of the beam support 3, and an aqueduct 6 is cast on the template system 5. The two ends of the aqueduct 6 are supported on the cap beams 1 of two adjacent piers 11 and on the support seats 21 of the corresponding hanging members 2. The support seats 21 are supported on the cap beam 1.

[0044] First, the aqueduct 6, part of the cast-in-place support structure, is supported on the support seats 21 of the hanging components 2, which in turn are supported on the cap beam 1. During the pouring of the aqueduct 6, although the weight of the middle part of the aqueduct 6 is supported by the formwork system 5 on the lower ends of the corresponding hanging components 2 at both ends, the weight of the two ends of the aqueduct 6 is also supported on the cap beam 1 through the support seats 21. Thus, for a single hanging component 2, in addition to the force on its lower end, its support seat 21 is also subjected to the pressure on the end of the aqueduct 6, pressing the hanging component 2 tightly between the end of the aqueduct 6 and the cap beam 1, improving the stability of the single hanging component 2. At the same time, during the pouring process, the weight at both ends and the middle of the aqueduct 6 gradually increases, that is, the tensile force on the lower end of the hanging component 2 and the upward support force (the reverse force of the pressure on the support seat 21) both increase, making the hanging component 2 relatively balanced in terms of force and good in terms of stability. In addition, the force is more balanced relative to the hanging component 2 as a whole, resulting in better overall stability. Secondly, when the beam support 3 is unloaded, the lowering mechanism 7 is installed on the mounting base 22. On the one hand, this avoids installing the lowering mechanism 7 on the aqueduct 6, reducing installation costs and damage to the aqueduct 6 structure. On the other hand, during the unloading process of the beam support 3, it is lowered by the lowering mechanism 7 installed on the mounting base 22. The weight of the beam support 3, which was originally suspended from the lower end of the outer hanging member 2 of the cover beam 1, is added to the hanging member 2 and the mounting base 22. This is equivalent to changing the force originally applied by the aqueduct 6 to the lower end of the hanging member 2 and the support base 21 to the force applied to the mounting base 22 and the support base 21 of the hanging member 2. Since the support base 21 and the mounting base 22 are fixed on the left and right sides of the hanging member 2 respectively, the rotational force on the mounting base 22 and the support base 21 will make the overall force on the hanging member 2 more balanced, reducing the tilting during the descent process, thereby reducing the loosening of the hanging member 2 and improving the stability of the overall structure.

[0045] In this article, the left and right sides refer to the two sides along the width direction of the aqueduct 6, that is, the perpendicular lines on the left and right sides are parallel to the width direction of the aqueduct 6, and the front and back sides refer to the two sides along the length direction of the aqueduct 6, that is, the perpendicular lines on the front and back sides are parallel to the length direction of the aqueduct 6.

[0046] Furthermore, in this embodiment, the top of the hanging component 2 is provided with a horizontal hanging part 23, which is pressed against the top surface of the cap beam 1. The horizontal hanging part 23 is hung on the top surface of the cap beam 1. In this way, the hanging component 2 can not only be subjected to the tension at the lower end, but also to the upward supporting force of the top surface of the cap beam 1, which improves the load-bearing strength of the hanging component 2 and reduces the stress on the fixing mechanism 4.

[0047] Furthermore, in this embodiment, a wooden pad 8 is placed between the support base 21 and the aqueduct 6 to prevent the aqueduct 6 from being crushed by localized force on the support base 21. The pad 8 is made of 5cm square timber.

[0048] Furthermore, in this embodiment, the fixing mechanism 4 includes a longitudinal pipe 41 and a tie rod 42. The longitudinal pipe 41 is embedded in the cap beam 1 and passes through the front and rear sides of the cap beam 1. The tie rod 42 passes through the longitudinal pipe 41, and the two ends of the tie rod 42 extend from the two ends of the longitudinal pipe 41 respectively. Each pair of hanging parts 2 is fixed to the two ends of the corresponding tie rod 42.

[0049] During formwork erection, the beam support 3 is suspended in mid-air via the hanging brackets 2 to support the formwork system 5. It does not touch the ground and is not limited by the height of the piers 11. For high piers, no additional support is needed, resulting in lower construction costs and a shorter construction period. Furthermore, the lifting and adjusting mechanism 9 adjusts the formwork system 5 to the required erection height, improving erection efficiency and positioning accuracy, thus enhancing construction quality. Utilizing mechanical principles, temporary ties are achieved via tie rods 42. The hanging brackets 2 convert the structural force from the vertical force of the hanging brackets 2 to the horizontal force of the tie rods 42, reducing manual labor, improving construction safety, increasing installation and dismantling efficiency, and allowing for reuse. This is particularly beneficial for aqueduct construction with high piers, significantly improving efficiency. A lowering system is installed on the aqueduct 6 to lower the beam support 3 and formwork system 5, enabling demolding of the formwork system 5 and facilitating reuse in different construction locations, further improving efficiency and reducing costs. The close coordination of each step in this aqueduct cast-in-place support method reduces construction costs, minimizes land occupation, and improves both efficiency and quality.

[0050] Furthermore, in this embodiment, both ends of the pull rod 42 are threadedly connected to fixing nuts 43, which abut against the corresponding hanging member 2. Both ends of the pull rod 42 are provided with external threads, and the fixing nuts 43 are connected to the external threads at the ends of the pull rod 42. The ends of the pull rod 42 pass through the hanging member 2, and the fixing nuts 43 press the hanging member 2 tightly onto the cover beam 1 from the outside of the hanging member 2.

[0051] Furthermore, the hanging parts 2 on both sides of the cap beam 1 are simultaneously installed on the tie rod 42. The two ends of the tie rod 42 have opposite spiral directions. In this way, when the hanging parts 2 on both sides of the cap beam 1 are installed on the tie rod 42 at the same time, the fixing nuts 43 of the tie rod 42 are tightened simultaneously, which can press the hanging parts 2 on both sides of the cap beam 1 onto the cap beam 1 at the same time, making the installation operation more convenient and quick.

[0052] Furthermore, in this embodiment, a lifting adjustment mechanism 9 is installed at the lower end of the hanging component 2, and both ends of the beam support 3 can be detachably connected to the lifting adjustment mechanism 9 on the corresponding hanging component 2. The height of the formwork system 5 can be adjusted through the lifting adjustment mechanism 9. For example, during formwork erection, the formwork system 5 can be adjusted to the erection height through the lifting adjustment mechanism 9, which improves the efficiency of formwork erection and the accuracy of the formwork position, thereby improving the construction quality.

[0053] Furthermore, in this embodiment, the lifting and adjusting mechanism 9 includes a screw 91, an adjusting nut 92, and a transverse hanging beam 93. The top end of the screw 91 is fixed to the hanging component 2, and the transverse hanging beam 93 is fitted onto the screw 91 and clamped and fixed by the adjusting nut 92. The end of the beam support 3 is placed on the corresponding transverse hanging beam 93. The screw 91, adjusting nut 92, and transverse hanging beam 93 enable the beam support 3 to be installed in a longitudinal suspended manner, which is convenient for construction and disassembly. Moreover, the height of the beam support 3 relative to the ground can be adjusted by turning the adjusting nut 92, thereby adjusting the erection height of the formwork system 5 on the beam support 3, which is convenient for erection.

[0054] Furthermore, in this embodiment, after the top surface of the beam support 3 is provided with transverse distribution beams 31 spaced along the length direction, the formwork system 5 is installed on top of each transverse distribution beam 31. The beam support 3 is a Bailey beam support. The transverse distribution beams 31 are fixed to the beam support 3 by U-bolts. After the formwork system 5 is installed, the strength is tested using the surcharge preloading method.

[0055] Example 2:

[0056] Figure 7 and Figure 8 An embodiment of the method for removing the beam support of the cast-in-place support structure of the aqueduct according to the present invention is shown. The method for removing the beam support of the cast-in-place support structure of the aqueduct includes the following steps:

[0057] S1. Installation of the lowering mechanism 7: Install the lowering mechanism 7 on the mounting base 22 of each hanging part 2 at both ends of the beam support 3, and connect both ends of the beam support 3 to the corresponding lowering mechanism 7.

[0058] S2. Dismantle the connection between beam support 3 and hanging component 2;

[0059] S3, Demolding: The beam support 3 is lowered a suitable distance by each lowering mechanism 7, so that the template system 5 on the beam support 3 is separated from the aqueduct 6, thus achieving demolding;

[0060] S4. Demolition: Continue to lower the beam support 3 to the ground through each lowering mechanism 7, and then dismantle the beam support 3 and the formwork system 5.

[0061] In this embodiment, the lowering mechanism 7 includes continuous jacks 71 and steel strands 72. The continuous jacks 71 are mounted on the mounting base 22 and connected to the beam support 3 through the steel strands 72. The continuous jacks 71 of each lowering mechanism 7 are connected to a control module 73. In steps S3 and S4, the control module 73 controls each continuous jack 71 to operate synchronously so that the lowering mechanism 7 is lowered smoothly.

[0062] When the beam support 3 is unloaded, the lowering mechanism 7 is installed on the mounting base 22. On the one hand, this avoids installing the lowering mechanism 7 on the aqueduct 6, reducing installation costs and damage to the aqueduct 6 structure. On the other hand, during the unloading process of the beam support 3, it is lowered by the lowering mechanism 7 installed on the mounting base 22. The weight of the beam support 3, which was originally suspended from the lower end of the outer hanging member 2 of the cover beam 1, is added to the hanging member 2 and the mounting base 22. This is equivalent to changing the force originally applied by the aqueduct 6 to the lower end of the hanging member 2 and the support base 21 to the force applied to the mounting base 22 and the support base 21 of the hanging member 2. Since the support base 21 and the mounting base 22 are fixed on the left and right sides of the hanging member 2 respectively, the rotational force on the mounting base 22 and the support base 21 will make the overall force on the hanging member 2 more balanced, reduce the tilting during the descent, thereby reducing the loosening of the hanging member 2 and improving the stability of the overall structure.

[0063] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A cast-in-place support structure for an aqueduct, comprising a cap beam (1) cast on top of a pier (11) and a beam support (3) disposed between the cap beams (1) of two adjacent piers (11), characterized in that: The cap beam (1) is provided with a pair of hanging parts (2) on its left and right sides respectively. Each pair of hanging parts (2) is set on the front and rear sides of the cap beam (1) and is fixedly connected by a fixing mechanism (4). The left and right sides of the hanging parts (2) are provided with a support seat (21) and a mounting seat (22) for installing the lowering mechanism (7) respectively. The two ends of the beam support (3) can be detachably connected to the lower end of the corresponding hanging parts (2). The top of the beam support (3) is equipped with a template system (5). A trough (6) is poured on the template system (5). The two ends of the trough (6) are supported on the cap beam (1) of two adjacent piers (11) respectively and supported on the support seat (21) of the corresponding hanging parts (2). Above, the support seat (21) is supported on the cover beam (1), so that the hanging part (2) is pressed between the end of the aqueduct (6) and the cover beam (1); the fixing mechanism (4) includes a longitudinal pipe (41) and a tie rod (42). The longitudinal pipe (41) is embedded in the cover beam (1) and passes through the front and rear sides of the cover beam (1). The tie rod (42) is inserted in the longitudinal pipe (41). The two ends of the tie rod (42) extend from the two ends of the longitudinal pipe (41) respectively. Each pair of hanging parts (2) is fixed at the two ends of the corresponding tie rod (42). The two ends of the tie rod (42) are threaded with fixing nuts (43). The fixing nuts (43) are pressed against the corresponding hanging parts (2).

2. The cast-in-place support structure for the aqueduct according to claim 1, characterized in that: The top of the hanging component (2) is provided with a horizontal hanging part (23), which is pressed onto the top surface of the cap beam (1).

3. The cast-in-place support structure for the aqueduct according to claim 1, characterized in that: A wooden pad (8) is placed between the support base (21) and the aqueduct (6).

4. The cast-in-place support structure for the aqueduct according to claim 1, characterized in that: The lower end of the hanging component (2) is equipped with a lifting adjustment mechanism (9), and both ends of the beam support (3) can be detachably connected to the lifting adjustment mechanism (9) on the corresponding hanging component (2).

5. The cast-in-place support structure for the aqueduct according to claim 4, characterized in that: The lifting adjustment mechanism (9) includes a screw (91), an adjusting nut (92) and a transverse hanging beam (93). The top end of the screw (91) is fixed on the hanging part (2). The transverse hanging beam (93) is sleeved on the screw (91) and clamped and fixed by the adjusting nut (92). The end of the beam support (3) is placed on the corresponding transverse hanging beam (93).

6. The cast-in-place support structure for the aqueduct according to claim 1, characterized in that: After the top surface of the beam support (3) is provided with transverse distribution beams (31) spaced along the length direction, the template system (5) is installed on the top of each transverse distribution beam (31).

7. A method for removing the beam support of a cast-in-place aqueduct support structure according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Installation of the lowering mechanism (7): Install the lowering mechanism (7) on the mounting seat (22) of each hanging part (2) at both ends of the beam support (3), and connect both ends of the beam support (3) with the corresponding lowering mechanism (7); S2. Dismantle the connection between the beam support (3) and the hanging component (2); S3, Demolding: The beam support (3) is lowered by each lowering mechanism (7) to a suitable distance, so that the template system (5) on the beam support (3) is separated from the aqueduct (6), thus achieving demolding; S4. Demolition: Continue to lower the beam support (3) to the ground through each lowering mechanism (7), and then dismantle the beam support (3) and the formwork system (5).

8. The method for removing the beam support of the cast-in-place support structure of the aqueduct according to claim 7, characterized in that: The lowering mechanism (7) includes a continuous jack (71) and a steel strand (72). The continuous jack (71) is mounted on the mounting base (22) and connected to the beam support (3) through the steel strand (72). The continuous jacks (71) of each lowering mechanism (7) are connected to a control module (73). In steps S3 and S4, the control module (73) controls each continuous jack (71) to operate synchronously so that the lowering mechanism (7) is lowered smoothly.

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