Lower bearing truss type cantilever beam manufacturing machine and construction method

Abstract

The invention provides a lower bearing truss type cantilever beam forming machine which comprises an inverted-U-shaped portal frame and a walking mechanism, main trusses are arranged on the two sides of an opening in the bottom of the inverted-U-shaped portal frame, the two main trusses are arranged in parallel and perpendicular to the inverted-U-shaped portal frame, the main trusses and the inverted-U-shaped portal frame are fixedly connected together through an anchoring system, and the walking mechanism is arranged on the inverted-U-shaped portal frame. The walking mechanism comprises an on-beam walking system, a reverse jacking system and a limiting wheel, supporting feet and the reverse jacking system are arranged at the rear end of the top of a main cross beam of the main truss, and the limiting wheel is arranged at the rear end of the inner side of the main cross beam of the main truss; the inverted U-shaped portal frame and the on-beam walking system are connected together; and each main truss is provided with an outer mold demolding system connected with the outer mold system, the outer mold system, the bottom mold system and the inner mold system located on the inner side of the outer mold system are all fixedly connected to the upper side of the bottom platform, and the inner mold system is arranged on the upper side of the bottom mold system. The invention has the beneficial effects that through the unique design of the lower bearing truss, the front and rear U-shaped gantries are saved, and the operation interference on the upper part of the bridge beam surface is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to a bottom-bearing truss type cantilever beam-making machine and a construction method. Background Art

[0002] Traditional bridge construction methods have problems such as low construction efficiency and difficulty in quality control when facing large spans and complex terrains. New bridge construction equipment is urgently needed to meet construction needs. The structural form of traditional beam-making machines cannot adapt well to the special requirements of bridge construction in some cases. For example, some top-supported beam-making machines may cause the center of gravity to move upward and the stability to deteriorate due to the excessive height of the structure when constructing large spans. In addition, there are many operating interferences on the upper part of the beam surface of the top-supported beam-making machine, which is not conducive to the standardized organization of construction on site, and the main beam is heavy and the economy is poor. Summary of the invention

[0003] In view of this, the present invention aims to overcome the deficiencies of the above-mentioned problems in the prior art and proposes a bottom-supported truss type cantilever beam-making machine and a construction method.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A bottom-supported truss cantilever beam-making machine comprises an inverted U-shaped gantry and a running mechanism. Main trusses are arranged on both sides of the bottom opening of the inverted U-shaped gantry, and the two main trusses are arranged in parallel and perpendicular to the inverted U-shaped gantry. The main trusses and the inverted U-shaped gantry are fixed together by an anchoring system. The running mechanism comprises a beam running system, an anti-top system and a limiting wheel. Support feet and an anti-top system are arranged at the rear end of the top of the main crossbeam of the main truss, and a limiting wheel is arranged at the rear end of the inner side of the main crossbeam of the main truss; the inverted U-shaped gantry and the horizontally arranged beam running system are connected together; each main truss is provided with an outer mold demoulding system connected to the outer membrane system, the outer membrane system, the bottom mold system and the inner membrane system located on the inner side of the outer membrane system are all fixed to the upper side of the bottom platform, and the inner membrane system is arranged on the upper side of the bottom mold system.

[0006] Furthermore, the main truss has an inverted triangle structure.

[0007] The present application also provides a construction method of a bottom-bearing truss type cantilever beam-making machine, comprising the following steps:

[0008] S1. Pour the first section of concrete and remove the end formwork after the concrete reaches the designed strength;

[0009] S2. Demoulding of the bottom mould system: lower the bottom mould to the concrete surface by adjusting the through-hole jack of the suspension system of the bottom platform, and then remove the suspension rod of the suspension system at the rear middle part of the bottom platform;

[0010] S3. Demolding the outer formwork system, by first moving the outer formwork system laterally outward and then vertically downward through the outer formwork demoulding system, so that the outer formwork system is separated from the concrete surface;

[0011] S4. Demoulding the inner mould system: first fold the inner mould by using the turning cylinder on the inner mould system, then lower the inner mould by adjusting the through-hole jack of the inner sliding beam suspension system, and then move the inner mould inward by using the transverse cylinder to separate the inner mould from the concrete surface;

[0012] S5. Extend the running beam of the running mechanism and fix it with bolts;

[0013] S6. Loosen the anchor system and adjust the support legs to lower so that the anti-top system contacts the poured concrete flange;

[0014] S7. Fix the inner mold sliding hanger rod, remove the inner mold sliding beam fixed hanger rod and anchor system around the inner mold sliding hanger rod;

[0015] S8. Push the front slide through the traveling mechanism to drive the inverted U-shaped gantry, bottom mold system, outer mold system, and inner mold system to move forward together;

[0016] S9. After the inverted U-shaped gantry is moved into position, the anchoring system is installed, and the suspension rod of the suspension system at the rear middle part of the bottom platform is installed;

[0017] S10. Drive the inner mold pulley to make the inner mold return to the first segment box, leaving space for tying the reinforcement of the second segment bottom plate and web;

[0018] S11. Adjust the support foot elevation to contact the poured concrete flange while keeping the main truss level;

[0019] S12. Measure and adjust the elevation of the bottom formwork system and the outer formwork system, and tie the bottom plate and web reinforcement;

[0020] S13. Drive the inner mold pulley to move the inner mold system to the designed position, and anchor the inner mold sliding beam to the concrete beam;

[0021] S14. Adjust the elevation of the inner formwork system, tie the top plate reinforcement, and then pour the second section concrete;

[0022] S15. Repeat the above steps to complete the concrete pouring of all segments.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] The present invention adopts a unique lower bearing truss design, saves the front and rear U-shaped door frames, utilizes the main structure, and eliminates the rear anchorage. It is light in weight, has a large main truss rigidity, small deformation, and good economy. The running adopts an anti-top system and the casting is hard supported by supporting legs, so there is no risk of overturning. The front upper cross beam is low, the hanger length is short, the safety is high, there is no need to anchor the running beam, and there is less interference in the operation on the upper part of the bridge beam surface, which is convenient for standardized on-site layout and construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the mechanism of the bottom-supported truss cantilever beam-making machine according to an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the internal structure of a bottom-supported truss-type cantilever beam-making machine according to an embodiment of the present invention;

[0028] Figure 3 for Figure 1 A cross-sectional view along the 1-1 direction;

[0029] Figure 4 for Figure 1 A cross-sectional view along the 2-2 direction;

[0030] Figure 5 for Figure 1 A cross-sectional view along the 4-4 direction;

[0031] Figure 6 for Figure 1 Cross-sectional views along directions 3-3 and 5-5.

[0032] Description of reference numerals:

[0033] 1. Main truss; 2. Front upper crossbeam; 3. Inverted U-shaped portal frame; 4. Suspension system; 5. Bottom platform; 6. Bottom mold system; 7. External mold system; 8. Internal mold system; 9. Anchor system; 10. Traveling system on beam; 11. External mold demoulding system; 12. Anti-top system; 13. Limiting wheel; 14. Support foot. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0037] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0038] As shown in the figure, a bottom-supported truss cantilever beam-making machine includes an inverted U-shaped portal frame 3 and a running mechanism. Main trusses 1 are provided on both sides of the bottom opening of the inverted U-shaped portal frame 3, and the two main trusses 1 are arranged in parallel and perpendicular to the inverted U-shaped portal frame 3. The main trusses 1 and the inverted U-shaped portal frame 3 are fixed together by an anchoring system 9. The running mechanism includes a beam running system 10, an anti-top system 12 and a limiting wheel 13. Support feet 14 and an anti-top system 12 are provided at the rear end of the top of the main beam of the main truss 1, and a limiting wheel 13 is provided at the rear end of the inner side of the main beam of the main truss 1; the inverted U-shaped portal frame 3 and the horizontally arranged beam running system 10 are connected together; each main truss 1 is provided with an outer mold demoulding system 11 connected to the outer membrane system, and the outer membrane system, the bottom mold system 6 and the inner membrane system located on the inner side of the outer membrane system are all fixed to the upper side of the bottom platform 5, and the inner membrane system is arranged on the upper side of the bottom mold system 6. In this embodiment, the bottom platform 5 and the upper part of the outer formwork system 7 are connected together through the suspension system 4, the bottom membrane system, the bottom platform 5 and the inner membrane system are also connected together through the suspension system 4, and the bottom platform 5 and the main truss 1 are also fixed together through the suspension system 4. In addition, a front upper cross beam 2 is provided between the front ends of the two main trusses 1, the front end of the bottom platform 5 is hung on the front upper cross beam 2 through the suspension system 4, the rear end of the bottom formwork system 6 is hung on the main truss 1 through the suspension system 4, and the inner formwork system 8 is suspended on the front end of the poured segment concrete and the inner formwork slideway beam.

[0039] The main truss 1 is an inverted triangle structure.

[0040] In this embodiment, the bottom mold system 6 includes a bottom mold back rib and a bottom mold plate; the outer mold system 7 includes an outer guide beam, an outer mold main rib, an outer mold side truss, an outer mold upper flange truss, a back rib, and an outer mold plate structure; the inner mold system 8 includes an inner sliding beam, an inner mold main rib, an inner mold truss, an inner mold running beam, a back rib, and an inner mold plate structure; the suspension system 4 includes a front suspension rod of the bottom platform 5, a front suspension rod of the inner sliding beam, a rear suspension rod of the inner sliding beam, a rear suspension rod of the bottom platform 5, a rear middle suspension rod of the bottom platform 5, and a lower cross beam lifting lug; the anchoring system 9 includes an anchor beam, an anchor rod, and a lifting lug; the running mechanism includes a running system 10 on the beam, an anti-top system 12, and a limit wheel 13, and the anti-top system 12 includes an anti-top wheel. The structures are all welded with steel sections and steel plates, and are processed and manufactured in blocks. After being transported to the site, they are assembled into a whole.

[0041] The present application also provides a construction method of a bottom-bearing truss type cantilever beam-making machine, comprising the following steps:

[0042] S1. Pour the first section of concrete and remove the end formwork after the concrete reaches the designed strength;

[0043] S2. Demolding the bottom mold system 6, by adjusting the bottom platform 5 of the suspension system 4 through the jack, the bottom mold lowered to the concrete surface, and then remove the bottom platform 5 after the middle part of the suspension system 4 of the boom;

[0044] S3. Demolding the outer mold system 7, the outer mold system 7 is first moved laterally outward and then vertically lowered through the outer mold demolding system 11, so that the outer mold system 7 is separated from the concrete surface;

[0045] S4. Demolding the inner mold system 8, first fold the inner mold by the flip cylinder on the inner mold system 8, and then lower the inner mold by adjusting the inner sliding beam suspension system 4 through the jack, and then move the inner mold inward by the lateral cylinder to separate the inner mold from the concrete surface;

[0046] S5. Extend the running beam of the running mechanism and fix it with bolts;

[0047] S6. Relax the anchoring system 9, adjust the support leg 14 down, so that the anti-top system 12 is in contact with the poured concrete flange;

[0048] S7. Fix the inner mold sliding hanger hanger rod, remove the inner mold sliding hanger hanger rod around the inner mold sliding beam fixed hanger hanger rod and anchor system 9;

[0049] S8. Push the front slide through the traveling mechanism to drive the inverted U-shaped gantry 3, the bottom mold system 6, the outer mold system 7, and the inner mold system 8 to move forward together;

[0050] S9. After the inverted U-shaped gantry 3 is moved into place, the anchoring system 9 is installed, and the hanger of the suspension system 4 at the middle part of the bottom platform 5 is installed;

[0051] S10. The inner mold pulley is driven by a motor to return the inner mold to the first segment box, leaving space for tying the bottom plate and web reinforcement of the second segment;

[0052] S11. Adjust the elevation of the support leg 14 to contact the poured concrete flange while keeping the main truss 1 horizontal;

[0053] S12. Measure and adjust the elevation of the bottom formwork system 6 and the outer formwork system 7, and tie the bottom plate and web reinforcement;

[0054] S13. The inner mold pulley is driven by a motor to move the inner mold system 8 to the designed position, and the inner mold slide beam is fixed to the hanger rod anchored on the concrete beam;

[0055] S14. After adjusting the elevation of the inner formwork system 8, tie the top plate reinforcement, and then pour the second section of concrete;

[0056] S15. Repeat the above steps to complete the concrete pouring of all segments.

[0057] Compared with the prior art, the present invention has the following advantages:

[0058] The present invention saves the front and rear U-shaped door frames through the unique lower bearing truss design, utilizes the main structure, cancels the rear anchorage, is light in weight, has a main truss 1 with high rigidity, small deformation, and good economy. The running adopts the anti-top system 12, and the casting adopts the support legs 14 for hard support, without the risk of overturning. The front upper cross beam 2 is low, the length of the hanger is short, the safety is high, there is no need to anchor the running beam, and there is less interference in the operation on the upper part of the beam surface, which is convenient for standardized on-site layout and construction operations.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cantilever beam making machine with a bottom truss frame, characterized in that: It includes an inverted U-shaped portal frame and a running mechanism. Main trusses are provided on both sides of the bottom opening of the inverted U-shaped portal frame, and the two main trusses are arranged in parallel and perpendicular to the inverted U-shaped portal frame. The main trusses and the inverted U-shaped portal frame are fixed together by an anchoring system. The running mechanism includes a beam running system, an anti-top system and a limiting wheel. Support feet and an anti-top system are provided at the rear end of the top of the main crossbeam of the main truss, and a limiting wheel is provided at the rear end of the inner side of the main crossbeam of the main truss; the inverted U-shaped portal frame and the horizontally arranged beam running system are connected together; each main truss is provided with an outer mold demoulding system connected to the outer membrane system, the outer membrane system, the bottom mold system and the inner membrane system located on the inner side of the outer membrane system are all fixed to the upper side of the bottom platform, and the inner membrane system is arranged on the upper side of the bottom mold system.

2. A bottom-supported truss cantilever beam-making machine according to claim 1, characterized in that: The main truss is an inverted triangle structure.

3. A construction method using the bottom truss cantilever beam making machine described in any one of claims 1-2, characterized in that: The following steps are involved: S1. Pour the first section of concrete and remove the end formwork after the concrete reaches the designed strength; S2. Demoulding of the bottom mould system: lower the bottom mould to the concrete surface by adjusting the through-hole jack of the suspension system of the bottom platform, and then remove the suspension rod of the suspension system at the rear middle part of the bottom platform; S3. Demolding the outer formwork system, by first moving the outer formwork system laterally outward and then vertically downward through the outer formwork demoulding system, so that the outer formwork system is separated from the concrete surface; S4. Demoulding the inner mould system: first fold the inner mould by using the turning cylinder on the inner mould system, then lower the inner mould by adjusting the through-hole jack of the inner sliding beam suspension system, and then move the inner mould inward by using the transverse cylinder to separate the inner mould from the concrete surface; S5. Extend the running beam of the running mechanism and fix it with bolts; S6. Loosen the anchor system and adjust the support legs to lower so that the anti-top system contacts the poured concrete flange; S7. Fix the inner mold sliding hanger rod, remove the inner mold sliding beam fixed hanger rod and anchor system around the inner mold sliding hanger rod; S8. Push the front slide through the traveling mechanism to drive the inverted U-shaped gantry, bottom mold system, outer mold system, and inner mold system to move forward together; S9. After the inverted U-shaped gantry is moved into position, the anchoring system is installed, and the suspension rod of the suspension system at the rear middle part of the bottom platform is installed; S10. Drive the inner mold pulley to make the inner mold return to the first segment box, leaving space for tying the reinforcement of the second segment bottom plate and web; S11. Adjust the support foot elevation to contact the poured concrete flange while keeping the main truss level; S12. Measure and adjust the elevation of the bottom formwork system and the outer formwork system, and tie the bottom plate and web reinforcement; S13. Drive the inner mold pulley to move the inner mold system to the designed position, and anchor the inner mold sliding beam to the concrete beam; S14. Adjust the elevation of the inner formwork system, tie the top plate reinforcement, and then pour the second section concrete; S15. Repeat the above steps to complete the concrete pouring of all segments.

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