Deck truss type cantilever beam manufacturing machine and construction method

Abstract

The invention provides a deck truss type cantilever beam manufacturing machine which comprises a front inverted-U-shaped portal frame, a middle inverted-U-shaped portal frame and a rear inverted-U-shaped portal frame, and a triangular truss is erected above the front inverted-U-shaped portal frame, the middle inverted-U-shaped portal frame and the rear inverted-U-shaped portal frame. Temporary supporting legs and a walking system are arranged below the triangular truss, the lower portion of the anchoring system is connected with an inner mold system and an outer mold system, and the lower end of the inner mold system and the lower end of the outer mold system are fixed to a bottom mold system at the same time. Outer mold demolding systems are arranged on the front inverted-U-shaped portal frame and the rear inverted-U-shaped portal frame, suspension systems are arranged on the lower portion of the front inverted-U-shaped portal frame and the middle inverted-U-shaped portal frame, the lower ends of the suspension systems of the front inverted-U-shaped portal frame and the middle inverted-U-shaped portal frame are jointly connected to the two sides of the bottom platform, a front lower cross beam is arranged at the lower end of the suspension system of the front inverted-U-shaped portal frame, and a rear lower cross beam is arranged at the lower end of the middle inverted-U-shaped portal frame. The load-bearing system adopts the deck type triangular truss and the front, middle and rear groups of inverted U-shaped portals, so that the structure weight is light, the economical efficiency is good, the operation and daily inspection are convenient, and an anchoring walking beam is not needed.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to an upper 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, when some bottom-supported beam-making machines are used for large-span construction, they may occupy a large amount of space below during operation. For some projects with limited space on the construction site, this may affect the progress of other construction processes. It is necessary to arrange the construction sequence and site layout reasonably. The lower structure is located below the bridge deck. Once these components fail or are damaged, it is difficult for maintenance personnel to inspect and maintain them, which is not conducive to organizing construction on site. Summary of the invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes an upper-supported truss-type cantilever beam-making machine and a construction method to solve the problems that may arise in the lower-supported beam-making machine during bridge construction. A triangular truss is adopted, which is light in weight and highly adaptable.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A cantilever beam-making machine with an upper truss structure comprises a front inverted U-shaped gantry, a middle inverted U-shaped gantry and a rear inverted U-shaped gantry, a triangular truss is set up above the three, and the two ends of the triangular truss are respectively fixed to the front inverted U-shaped gantry and the rear inverted U-shaped gantry through an anchoring system; a temporary support leg and a running system are arranged below the triangular truss, and the lower part of the anchoring system is respectively connected to the inner mold system and the outer mold system, and the lower ends of the inner mold system and the outer mold system are simultaneously fixed to the bottom mold system; the front inverted U-shaped gantry and the rear inverted U-shaped gantry are both provided with an outer mold demoulding system, and a suspension system is provided at the lower part of the front inverted U-shaped gantry and the middle inverted U-shaped gantry, and the lower ends of the suspension systems of the two are commonly connected to the two sides of the bottom platform, and a front lower cross beam is arranged at the lower end of the suspension system of the front inverted U-shaped gantry, and a rear lower cross beam is arranged at the lower end of the middle inverted U-shaped gantry.

[0006] Furthermore, a walking beam anchoring steel bar is provided at the lower end of the temporary support leg.

[0007] Furthermore, the triangular truss includes a horizontal base frame, a vertical support frame is provided in the middle of the horizontal base frame, and two left and right oblique support frames are symmetrically arranged on both sides of the vertical support frame, and the upper ends of the two oblique support frames are simultaneously fixed to the top of the vertical support frame, and the lower ends of the oblique support frames are fixed to the left and right sides of the horizontal base frame, and the horizontal base frame has an outward cantilever section.

[0008] A construction method using an upper truss type cantilever beam making machine comprises the following steps:

[0009] S1. Pour the first section of concrete. After the concrete reaches the designed strength, remove the end formwork, adjust the outer and inner formwork systems so that the outer and inner formworks are separated from the concrete surface, and then tension the longitudinal prestressed tendons and perform grouting;

[0010] S2. Adjust the through-hole jack of the suspension system to separate from the bottom mold;

[0011] S3, extend the running beam of the running system and anchor it on the concrete beam of the first section;

[0012] S4, the sliding hanger rods for fixing the inner mold, dismantling the triangular truss, anchoring system and the hanging rods for fixing the sliding beams of the inner mold;

[0013] S5. Push the triangular truss through the traveling system to drive the bottom formwork, outer formwork and inner formwork forward together; after the triangular truss is moved into place, install the rear end anchoring system of the triangular truss and install the anchor rod at the bottom of the beam;

[0014] S6, driving the inner mold pulley to make the inner mold return to the first segment box, leaving space for tying the bottom plate and web reinforcement of the second segment;

[0015] S7. Measure and adjust the elevation of the bottom form and outer form, and tie the bottom plate and web reinforcement;

[0016] S8, driving the inner mold pulley to move the inner mold to the designed position, and anchoring the inner mold sliding beam fixing hanger hanger rod on the concrete beam;

[0017] S9. After adjusting the elevation of the inner formwork, tie the top plate reinforcement, and then pour the second section concrete;

[0018] S10. Repeat the above steps to complete the concrete pouring of all segments.

[0019] Furthermore, in step S1, after the concrete joint surface is processed, the longitudinal prestressed tendons are tensioned and grouting is performed.

[0020] Further, in step S3, when the running beam of the running system is extended, the extended part of the running beam is connected and fixed to the original running beam by bolts.

[0021] Further, in step S5, the triangular truss is pushed by the traveling system and the inner sliding beam is driven to move forward at the same time.

[0022] Further, in step S6 and step S8, the inner mold pulley is driven to move by a motor.

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

[0024] The invention adopts a specially designed upper truss design, and the load-bearing system adopts an upper triangular truss and three sets of inverted U-shaped portal frames at the front, middle and rear. The traveling system is provided with an anti-top wheel, which has no risk of overturning. The upper structure is light in weight and has good economy. The triangular truss structure is common to ordinary hanging baskets, and has strong invertability. The front hanging and rear anchoring, and the load-bearing system are all above the beam surface. The workers have a large space for activities, which is convenient for operation and daily inspection, and there is no need to anchor the traveling beam. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 1 The present invention provides a structural schematic diagram of a top-supported truss-type cantilever beam-making machine;

[0027] Figure 2 for Figure 1 Schematic diagram of the inner structure in;

[0028] Figure 3 for Figure 1 1-1 sectional view;

[0029] Figure 4 for Figure 1 2-2 sectional view in FIG.

[0030] Figure 5 for Figure 1 3-3 sectional view in FIG.

[0031] Figure 6 for Figure 1 4-4 sectional view;

[0032] Figure 7 Layout diagram of anchor reinforcement for walking beam. DETAILED DESCRIPTION

[0033] 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.

[0034] 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 a limitation on the present invention. In addition, the terms "first", "second", etc. 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", etc. 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.

[0035] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 invention can be understood according to specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] A cantilever beam making machine with a truss top, such as Figures 1 to 7 As shown, it includes a front inverted U-shaped gantry 1, a middle inverted U-shaped gantry 2, and a rear inverted U-shaped gantry 3, a triangular truss 4 is erected above the three, and the two ends of the triangular truss are respectively fixed to the front inverted U-shaped gantry and the rear inverted U-shaped gantry through an anchoring system 5; a temporary support leg 7 and a running system 6 are arranged below the triangular truss, and an inner mold system 14 and an outer mold system 9 are connected below the anchoring system, and the lower ends of the inner mold system and the outer mold system are both fixed to the bottom mold system 15 at the same time, and an outer mold demoulding system 8 is arranged on the front inverted U-shaped gantry and the rear inverted U-shaped gantry, and a suspension system 10 is arranged at the lower part of the front inverted U-shaped gantry and the middle inverted U-shaped gantry, and the lower ends of the suspension systems of the two are commonly connected to both sides of the bottom platform 11, and a front lower cross beam 12 is arranged at the lower end of the suspension system of the front inverted U-shaped gantry, and a rear lower cross beam 13 is arranged at the lower end of the middle inverted U-shaped gantry.

[0038] The bottom mold system consists of the bottom mold back rib and the bottom mold plate; the outer mold system consists of the outer sliding beam, the outer mold main rib, the outer mold side truss, the outer mold upper flange truss, the back rib, and the outer mold plate; the inner mold system consists of the inner sliding beam, the inner mold main rib, the inner mold truss, the inner mold running beam, the back rib, and the inner mold plate; the anchoring system consists of the rear anchor beam, the rear anchor rod, and the 50t through-hole jack; the running system includes the running beam, the front slide, the rear slide, the top push slide, and the hydraulic cylinder; the outer mold demoulding system includes the outer mold horizontal demoulding and the outer mold vertical demoulding. Preferably, each structural component is welded with steel sections and steel plates, and is processed and manufactured in blocks, transported to the site, and then assembled into a whole.

[0039] The lower end of the temporary support leg is provided with a walking beam anchoring steel bar. The triangular truss includes a horizontal base frame, a vertical support frame is provided in the middle of the horizontal base frame, and two left and right oblique support frames are symmetrically arranged on both sides of the vertical support frame. Preferably, the upper ends of the two oblique support frames are simultaneously fixed to the top of the vertical support frame, and the lower ends of the oblique support frames are both fixed to the left and right sides of the horizontal base frame, and the horizontal base frames are both left with outward cantilever sections, which can be used to conveniently connect the anchoring system and ensure the overall structural stability after the anchoring system is connected to the external mold system.

[0040] A construction method using an upper truss type cantilever beam making machine comprises the following steps:

[0041] S1. Pour the first section of concrete. After the concrete reaches the designed strength, remove the end formwork, adjust the outer and inner formwork systems so that the outer and inner formworks are separated from the concrete surface, and then tension the longitudinal prestressed tendons and perform grouting;

[0042] S2. Adjust the through-hole jack of the suspension system to separate from the bottom mold;

[0043] S3, extend the running beam of the running system and anchor it on the concrete beam of the first section;

[0044] S4, the sliding hanger rods for fixing the inner mold, dismantling the triangular truss, anchoring system and the hanging rods for fixing the sliding beams of the inner mold;

[0045] S5. Push the triangular truss through the traveling system to drive the bottom formwork, outer formwork and inner formwork forward together; after the triangular truss is moved into place, install the rear end anchoring system of the triangular truss and install the anchor rod at the bottom of the beam;

[0046] S6, driving the inner mold pulley to make the inner mold return to the first segment box, leaving space for tying the bottom plate and web reinforcement of the second segment;

[0047] S7. Measure and adjust the elevation of the bottom form and outer form, and tie the bottom plate and web reinforcement;

[0048] S8, driving the inner mold pulley to move the inner mold to the designed position, and anchoring the inner mold sliding beam fixing hanger hanger rod on the concrete beam;

[0049] S9. After adjusting the elevation of the inner formwork, tie the top plate reinforcement, and then pour the second section concrete;

[0050] S10. Repeat the above steps to complete the concrete pouring of all segments.

[0051] In step S1, after processing the concrete joint surface, the longitudinal prestressed tendons are tensioned and grouting is performed.

[0052] In step S3, when the running beam of the running system is extended, the extended part of the running beam is connected and fixed to the original running beam structure by bolts.

[0053] In step S5, the traveling system pushes the triangular truss and drives the inner sliding beam to move forward together.

[0054] In both step S6 and step S8, the inner mold pulley is driven to move by a motor.

[0055] The invention adopts a specially designed upper truss design, and the load-bearing system adopts an upper triangular truss and three sets of inverted U-shaped portal frames at the front, middle and rear. The traveling system is provided with an anti-top wheel, which has no risk of overturning. The upper structure is light in weight and has good economy. The triangular truss structure is common to ordinary hanging baskets, and has strong invertability. The front hanging and rear anchoring, and the load-bearing system are all above the beam surface. The workers have a large space for activities, which is convenient for operation and daily inspection, and there is no need to anchor the traveling beam.

[0056] 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 truss top, characterized in that: It includes a front inverted U-shaped gantry, a middle inverted U-shaped gantry and a rear inverted U-shaped gantry, a triangular truss is erected above the three, and the two ends of the triangular truss are respectively fixed to the front inverted U-shaped gantry and the rear inverted U-shaped gantry through an anchoring system; temporary legs and a traveling system are arranged below the triangular truss, and the lower part of the anchoring system is respectively connected to the inner mold system and the outer mold system, and the lower ends of the inner mold system and the outer mold system are simultaneously fixed to the bottom mold system; the front inverted U-shaped gantry and the rear inverted U-shaped gantry are both provided with an outer mold demoulding system, and a suspension system is provided at the lower part of the front inverted U-shaped gantry and the middle inverted U-shaped gantry, and the lower ends of the suspension systems of the two are commonly connected to both sides of the bottom platform, and a front lower cross beam is provided at the lower end of the suspension system of the front inverted U-shaped gantry, and a rear lower cross beam is provided at the lower end of the middle inverted U-shaped gantry.

2. The cantilever beam making machine of the upper truss type according to claim 1, characterized in that: A walking beam anchoring steel bar is arranged at the lower end of the temporary supporting leg.

3. The cantilever beam making machine of the upper truss type according to claim 1, characterized in that: The triangular truss comprises a horizontal base frame, a vertical support frame is arranged in the middle of the horizontal base frame, and two left and right oblique support frames are symmetrically arranged on both sides of the vertical support frame.

4. A construction method using the top truss cantilever beam making machine according to any one of claims 1 to 3, characterized in that: The steps include: S1. Pour the first section of concrete. After the concrete reaches the designed strength, remove the end formwork, adjust the outer and inner formwork systems so that the outer and inner formworks are separated from the concrete surface, and then tension the longitudinal prestressed tendons and perform grouting; S2. Adjust the through-hole jack of the suspension system to separate from the bottom mold; S3, extend the running beam of the running system and anchor it on the concrete beam of the first section; S4, the sliding hanger rods for fixing the inner mold, dismantling the triangular truss, anchoring system and the hanging rods for fixing the sliding beams of the inner mold; S5. Install the rear end anchoring system of the triangular truss and the anchor rod at the bottom of the beam; S6, driving the inner mold pulley to make the inner mold return to the first segment box, leaving space for tying the bottom plate and web reinforcement of the second segment; S7. Measure and adjust the elevation of the bottom form and outer form, and tie the bottom plate and web reinforcement; S8, driving the inner mold pulley to move the inner mold to the designed position, and anchoring the inner mold sliding beam fixing hanger hanger rod on the concrete beam; S9. After adjusting the elevation of the inner formwork, tie the top plate reinforcement, and then pour the second section concrete; S10. Repeat the above steps to complete the concrete pouring of all segments.

5. The construction method of a top truss type cantilever beam making machine according to claim 4, characterized in that: In step S1, after processing the concrete joint surface, the longitudinal prestressed tendons are tensioned and grouting is performed.

6. The construction method of a top truss type cantilever beam making machine according to claim 4, characterized in that: In step S3, when the running beam of the running system is extended, the extended part of the running beam is connected and fixed to the original running beam by bolts.

7. The construction method of a top truss type cantilever beam making machine according to claim 4, characterized in that: In steps S6 and S8, the inner mold pulley is driven to move by a motor.

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