Bottom-carrying protection structure for erecting beam slab overcrossing existing line

Abstract

The utility model provides a beam plate erection bottom-carrying protection structure overcrossing existing lines, which comprises a plurality of T-shaped beams distributed along the transverse bridge direction and extending along the longitudinal bridge direction, a plurality of lifting holes distributed along the longitudinal bridge direction and lifting rods with the upper ends penetrating through the lifting holes are arranged on two sides of the width direction of the T-shaped beams, and the lifting rods are hung on the T-shaped beams through hanging nuts. The lower end of the suspender is arranged on a main beam extending in the longitudinal bridge direction in a penetrating mode, the lower end of the suspender is in threaded connection with a supporting nut for supporting the main beam, a plurality of distribution beams extending in the transverse bridge direction and distributed in the longitudinal bridge direction are laid on the main beam, protection bottom plates are laid on the distribution beams, and the protection bottom plates below the adjacent T beams are connected together in a lap joint mode. And the outer side of the protective bottom plate of the T-beam located on the outermost side is provided with edge protection. The utility model aims to provide the bottom-carrying protective structure for erecting the beam slab over the existing line, which can conveniently realize the effect of not influencing the passage of the lower part of the construction bridge, and solves the problem that the existing protective structure needs long under-bridge outage time.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a bottom protection structure for beam and slab erection that crosses an existing railway line. Background Technology

[0002] With the continuous improvement of transportation infrastructure, more and more highways are being constructed by crossing existing roads via bridges. When constructing bridges across roads, after the beams are erected, a protective backstop is required to prevent construction debris from falling onto the bridge deck and posing a safety hazard to traffic below. Traditional backstop construction involves assembling the backstop structure on the road below after all the beams are installed, and then using a crane to lift the entire structure in sections to the bottom of the beams for installation. This method requires dedicated traffic control on the existing road below the bridge, has a long construction period, is inefficient, and significantly impacts traffic flow on the existing road. If the bridge crosses an existing highway, the cost of traffic control is high, and the safety risks are significant. Utility Model Content

[0003] The present invention aims to provide a bottom protection structure for the erection of beams and slabs that cross existing railway lines without affecting the passage under the construction bridge, thus solving the problem that existing protection structures require long downtime under the bridge.

[0004] To achieve the above objectives, this utility model employs the following technology: a bottom protection structure for beam-slab erection over existing railway lines, comprising several T-beams distributed transversely and extending longitudinally. The T-beams are characterized by having several lifting holes distributed longitudinally on both sides of their width direction, and lifting rods with their upper ends inserted into the lifting holes. The lifting rods are suspended from the T-beams by suspension nuts. The lower ends of the lifting rods are inserted into the longitudinally extending main beam, and the lower ends of the lifting rods are threadedly connected to a supporting nut that holds the main beam. Several distribution beams distributed longitudinally and extending transversely are laid on the main beam, and protective base plates are laid on the distribution beams. The protective base plates under adjacent T-beams overlap, and the outer side of the protective base plate of the outermost T-beam is provided with edge protection. This ensures that during construction, objects will not fall to the ground and affect underground passage.

[0005] Preferably, the upper end of the hanger rod is threaded with an upper clamping nut, which, in conjunction with the suspension nut, clamps the beam plate of the T-beam. The lower end of the hanger rod is threaded with a lower clamping nut, which, in conjunction with the support nut, clamps the main beam. This provides a more stable fixation.

[0006] Preferably, a shock-absorbing spring is installed at the lower end of the boom, with the upper end of the spring supported on the lower surface of the main beam and the lower end supported on the supporting nut. This reduces vibrations when items fall onto the protective base plate.

[0007] Preferably, the main beam is a channel steel structure, with the openings of the channel steel forming the main beam facing downwards. This method is convenient to use and provides good stability during installation.

[0008] Preferably, the distribution beam is a channel steel structure with the openings of the channel steel forming the distribution beam facing downwards. This method is convenient due to the availability of materials and provides good stability during installation.

[0009] Preferably, the protective base plate is a steel plate structure.

[0010] Preferably, the edge protection includes a guardrail connected to the outer side of the protective base plate of the outermost T-beam and a diagonal tie rod whose upper end is connected to the protective tie rod. The lower end of the diagonal tie rod is fixed to the protective base plate of the outermost T-beam. This makes the edge protection more secure.

[0011] Preferably, a threaded connector is welded to the distribution beam below the outermost T-beam. This threaded connector passes through the lower end of the tie rod, and a pressing nut is threaded onto the threaded connector to press the lower end of the tie rod against the protective base plate of the outermost T-beam. This facilitates connection.

[0012] Preferably, the distribution beam is a channel steel structure with the openings of the channel steel forming the distribution beam facing downwards. The guardrail includes several vertical bars and a barrier connecting the vertical bars. The lower end of each vertical bar is provided with a lower horizontal clamp and an upper horizontal clamp, forming a locking slot. The lower horizontal clamp passes through the groove of the channel steel forming the distribution beam, and the upper horizontal clamp is located on the upper surface of the protective base plate of the outermost T-beam. The locking slot is used to prevent the guardrail from tipping over. This achieves a detachable connection without drilling bolt holes in the protective base plate. The connection is reliable.

[0013] Preferably, the upper horizontal clamp is a flat plate structure, forming a tightening gap between the upper horizontal clamp and the upper surface of the protective base plate of the outermost T-beam. Each side of the upper horizontal clamp along the longitudinal direction of the bridge has a wedge-shaped block that passes through the tightening gap. The outer end of each wedge-shaped block has a driving block, and the threaded end of the locking threaded rod passes through the two driving blocks and connects to the locking nut. In use, tightening the locking nut drives the two wedge-shaped blocks to close, thus locking the clamp. This provides both a secure hold and reduces effort during assembly.

[0014] Beneficial effects:

[0015] 1) This utility model features an integral steel structure base, ensuring robustness and reliability. The installation of the T-beams is carried out simultaneously with the construction of this utility model, eliminating the safety hazards associated with welding operations performed while the crane is in a suspended state.

[0016] 2) This utility model is decomposed into beams and slabs as units. Each bottom support unit is pre-assembled in the prefabrication yard and attached to the beams and slabs by bolting with hangers. After each beam and slab is installed and placed, the bottom support structure between the two beams and slabs only needs to be overlapped and welded firmly. At the same time as the beams and slabs are installed, the bottom support structure is also overlapped to form an overall bottom support structure.

[0017] 3) This utility model completes the bottom-line installation construction immediately after the beam and slab installation is completed, eliminating the need for separate traffic control for the bottom-line construction and saving traffic organization time.

[0018] 4) This utility model allows for the pre-assembly of the bottom support structure in the prefabrication yard, which can be directly achieved using the prefabrication yard gantry crane. This is convenient and quick. During installation, the structure is attached to the beam slab and installed simultaneously with the beam erection, eliminating the need for a crane for lifting and reducing labor intensity. It also saves the cost of traffic control measures specifically for the bottom support structure construction, thus saving on construction costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of Embodiment 1 of the present utility model;

[0020] Figure 2 This is a schematic diagram of Embodiment 2 of the present invention;

[0021] Figure 3 for Figure 2 A magnified view of a portion of point A;

[0022] Figure 4 for Figure 2 A magnified view of a portion of point B;

[0023] Figure 5 for Figure 2 A magnified view of a portion at point C;

[0024] Figure 6 for Figure 2 A schematic diagram of the D-D cross-section.

[0025] In the diagram: T-beam 1, hanger rod 2, suspension nut 3, main beam 5, support nut 6, distribution beam 7, protective base plate 8, edge protection 9, diagonal tie rod 10, vertical rod 11, upper clamping nut 12, lower clamping nut 13, shock-absorbing spring 14, connecting threaded head 15, pressing nut 16, lower horizontal clamp 17, upper horizontal clamp 18, tightening gap 19, wedge block 20, drive block 21, locking threaded rod 22, locking nut 23. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1, see Figure 1 A protective structure for a beam-slab structure spanning an existing railway line includes several T-beams 1 distributed transversely and extending longitudinally. Each T-beam has several suspension holes distributed longitudinally on both sides along its width, and suspension rods 2 with their upper ends inserted into the suspension holes. The suspension rods are suspended from the T-beams by suspension nuts 3. The lower ends of the suspension rods are inserted into a main beam 5 extending longitudinally, and the lower ends of the suspension rods are threadedly connected to a support nut 6 that supports the main beam. Several distribution beams 7 extending transversely and distributed longitudinally are laid on the main beams. Protective base plates 8 are laid on the distribution beams. The protective base plates under adjacent T-beams overlap. An edge protection 9 is provided on the outer side of the protective base plate of the outermost T-beam. The edge protection includes a guardrail connected to the outer side of the protective base plate of the outermost T-beam and a diagonal tie rod 10 connected at its upper end to a protective tie rod. The lower end of the diagonal tie rod is fixed to the protective base plate of the outermost T-beam. The guardrail includes several vertical bars 11 and a barrier frame connecting the vertical bars together. The upper end of the hanger is threaded with an upper clamping nut 12, which, in conjunction with a suspension nut, clamps the beam plate of the T-beam. The lower end of the hanger is threaded with a lower clamping nut 13, which, in conjunction with a support nut, clamps the main beam. The main beam is a channel steel structure, with the openings of the channel steel forming the main beam facing downwards. This design allows for easy material sourcing and provides good stability during installation. The distribution beam is also a channel steel structure, with the openings of the channel steel forming the distribution beam facing downwards. The protective base plate is a steel plate structure.

[0028] Example 2 differs from Example 1 in that:

[0029] See Figures 2 to 6A shock-absorbing spring 14 is installed at the lower end of the suspension rod. The upper end of the shock-absorbing spring is supported on the lower surface of the main beam, and the lower end is supported on the support nut. A connecting threaded head 15 is welded to the distribution beam below the outermost T-beam. The connecting threaded head is installed on the lower end of the diagonal tie rod, and a pressing nut 16 is threaded onto the connecting threaded head to press the lower end of the diagonal tie rod against the protective base plate of the outermost T-beam. The lower end of the vertical rod is provided with a lower horizontal clamp 17 and an upper horizontal clamp 18. A locking slot is formed between the lower horizontal clamp and the upper horizontal clamp. The lower horizontal clamp is installed in the groove of the channel steel that constitutes the distribution beam, and the upper horizontal clamp is located on the upper surface of the protective base plate of the outermost T-beam. The locking slot is used to prevent the guardrail from tipping over. Both the upper and lower horizontal clamps are flat plate structures. The upper horizontal clamp forms a tightening gap 19 with the upper surface of the protective base plate of the outermost T-beam. The upper horizontal clamp has a wedge block 20 on each side along the longitudinal direction of the bridge, which passes through the tightening gap. The outer end of the wedge block is provided with a drive block 21. The threaded end of the locking thread rod 22 passes through the two drive blocks and is connected to the locking nut 23.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bottom protection structure for erecting a beam slab across an existing line, comprising a plurality of T-beams extending in the longitudinal direction of the bridge along the transverse direction of the bridge, characterized in that, The two sides of the T beam in the width direction are provided with a plurality of lifting holes distributed along the longitudinal bridge direction, and an upper end of a lifting rod is arranged in the lifting hole. The lifting rod is hung on the T beam through a hanging nut. The lower end of the lifting rod is arranged in the main beam extending in the longitudinal bridge direction. A supporting nut is threadedly connected to the lower end of the lifting rod to support the main beam. The main beam is provided with a plurality of distribution beams extending in the transverse bridge direction and distributed in the longitudinal bridge direction. A protective bottom plate is arranged on the distribution beam. The protective bottom plates below adjacent T beams are overlapped together. The outer side of the protective bottom plate of the outermost T beam is provided with a side protection. The side protection comprises a protective fence connected to the outer side of the protective bottom plate of the outermost T beam and a diagonal pull rod connected to the upper end of the protective fence. The lower end of the diagonal pull rod is fixed to the protective bottom plate of the outermost T beam.

2. The bottom-hanging protective structure for erecting a beam slab across an existing line according to claim 1, characterized in that, The upper end of the lifting rod is threadedly connected with an upper clamping nut. The upper clamping nut clamps the beam plate of the T beam in cooperation with the hanging nut. The lower end of the lifting rod is threadedly connected with a lower clamping nut. The lower clamping nut clamps the main beam in cooperation with the supporting nut.

3. The bottom-hanging protective structure for erecting a beam slab across an existing line according to claim 1 or 2, characterized in that, The lower end of the lifting rod is provided with a damping spring. The upper end of the damping spring is supported on the lower surface of the main beam, and the lower end of the damping spring is supported on the supporting nut.

4. The bottom-hanging protective structure for erecting beam slabs over existing lines according to claim 1 or 2, characterized in that, The main beam is a channel steel structure. The opening of the channel steel constituting the main beam faces downward.

5. The bottom-hanging protective structure for erecting beam slabs over an existing line according to claim 1 or 2, characterized in that, The distribution beam is a channel steel structure. The opening of the channel steel constituting the distribution beam faces downward.

6. The bottom-hanging protective structure for erecting beam slabs over existing lines according to claim 1 or 2, characterized in that, The protective bottom plate is a steel plate structure.

7. The bottom-hanging protective structure for erecting beam slabs over an existing line according to claim 1 or 2, characterized in that, A connecting threaded head is welded on the distribution beam below the outermost T beam. The connecting threaded head is arranged on the lower end of the diagonal pull rod. A pressing nut is threadedly connected to the connecting threaded head to press the lower end of the diagonal pull rod on the protective bottom plate of the outermost T beam.

8. The bottom-hanging protective structure for erecting beam slabs over existing lines according to claim 1 or 2, characterized in that, The distribution beam is a channel steel structure. The opening of the channel steel constituting the distribution beam faces downward. The protective fence comprises a plurality of vertical rods and a blocking frame connecting the vertical rods together. The lower end of the vertical rod is provided with a lower horizontal clamping head and an upper horizontal clamping head. The lower horizontal clamping head and the upper horizontal clamping head form a clamping opening therebetween. The lower horizontal clamping head is arranged in the groove of the channel steel constituting the distribution beam. The upper horizontal clamping head is located on the upper surface of the protective bottom plate of the outermost T beam. The clamping opening is used to prevent the protective fence from falling.

9. The bottom-hanging protective structure for erecting a beam slab across an existing line according to claim 8, characterized in that, The upper horizontal clamping head is a flat plate structure. A gap is formed between the upper horizontal clamping head and the upper surface of the protective bottom plate of the outermost T beam. The upper horizontal clamping head is provided with a wedge-shaped block arranged in the gap on each side in the longitudinal bridge direction. The outer end of the wedge-shaped block is provided with a driving block. The threaded end of the locking threaded rod is connected with a locking nut after penetrating through the two driving blocks.

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