CN204199183U - Spanning existing railway cast-in-place beam cradle construction safeguard structure in one - Google Patents

Abstract

The utility model discloses a protective structure for the construction of a hanging basket on an existing cast-in-place railway beam, which comprises a protective hanger installed at the bottom of the hanging basket for construction of the cast-in-place beam and a protective structure for the hanging basket and the protective hanger. The temporary connection device for connection; the hanging basket includes the main truss, the bottom formwork and the bottom support frame; the bottom support frame is located under the bottom formwork, and the bottom support frame includes multiple lower longitudinal beams, front lower beams and rear lower beams; the protective hanger includes hangers The frame frame, the bottom insulation plate installed at the bottom of the frame frame and the side insulation structure surrounded by the side insulation plates installed on the outer wall around the frame frame of the frame frame. The front crossbeam and the rear crossbeam above the front and rear sides of the multi-channel longitudinal distribution beam, the front crossbeam is hung on the front lower crossbeam, and the rear crossbeam is hung on the rear lower crossbeam. The utility model has the advantages of simple structure, reasonable design, convenient assembly and disassembly, and good use effect, and can solve various problems existing in the existing protective scaffolding.

Description

A protective structure for the construction of cast-in-place beam hanging baskets on existing railways with upper spans

technical field

The utility model belongs to the technical field of cast-in-place beam construction, in particular to a protective structure for the construction of a hanging basket for cast-in-place beams spanning existing railways.

Background technique

Nowadays, there are many construction projects of cast-in-place beams spanning existing lines. For the construction of cast-in-place beams spanning existing lines, hanging basket construction is usually used. During the construction of hanging baskets, in order to ensure that the existing lines crossed below Operational security, security protection is particularly important. During the construction of the hanging basket, when the vertical distance between the bottom surface of the beam body of the cast-in-place beam and the catenary of the existing line that is located below it is relatively close, how to ensure the safety and security of the existing Xi’an line that is crossed during the construction process Preventing personnel from electric shock is a difficult point in construction. In addition, the construction site is limited and the construction period is short, so the construction is very difficult.

At present, when constructing cast-in-place beams spanning highways and railways, protective scaffolding is usually used for protection. As shown in Figure 1, the cast-in-place beam to be constructed is a concrete cast-in-place beam 1 that spans the existing railway line. 1, the vertical distance between the bottom surface of the beam body and the catenary catenary cable of the existing railway line is only 1.9m, while the vertical distance between the bottom of the hanging basket and the catenary catenary cable is only 0.7m. When the protective scaffolding 12 is arranged on the outside for protection, the protective scaffolding 12 generally adopts steel pipe columns, I-shaped truss beams or Bailey beams to build, although it has the ability to effectively prevent falling objects from high altitudes and prevent catenary high-voltage electric shocks from affecting people. However, there are defects such as large span, large consumables, difficulty in erection and dismantling, low safety factor and high cost, need for skylight points and block construction, and long construction period during construction.

Utility model content

The technical problem to be solved by the utility model is to provide a protective structure for the construction of the cast-in-place beam hanging basket on the existing railway, which is simple in structure, reasonable in design, convenient to disassemble and assemble, and good in use effect. , which can solve the problems existing in the existing protective scaffolding, such as large span, many consumable materials, difficult erection and dismantling, low safety factor, high cost, and long construction period.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a protective structure for the construction of a hanging basket on an existing cast-in-place railway beam, which is characterized in that it includes a hanging basket installed on the cast-in-place beam to be constructed The protective hanger at the bottom and the temporary connection device connecting the hanging basket and the protective hanger, the cast-in-place beam constructed is a concrete cast-in-place beam spanning the existing railway line, and the concrete cast-in-place beam is located in the existing Above the railway line; the hanging basket is located at the front end of the poured beam section of the concrete cast-in-place beam, and the hanging basket includes the main truss installed on the top of the beam body of the poured beam section, and the The bottom formwork at the bottom of the beam body and the bottom support frame supporting the bottom formwork, the bottom formwork is located under the main truss; the bottom support frame is located under the bottom formwork, and the bottom support frame includes multiple lower longitudinal Beams and front lower beams and rear lower beams respectively located under the front and rear sides of the multiple lower longitudinal beams. Arranged along the transverse bridge direction of the concrete cast-in-place beam; the protective hanger includes a hanger frame, a bottom insulating plate installed on the bottom of the hanger frame and a side insulation board installed on the outer wall around the hanger frame The side insulation structure surrounded by plates, the side insulation structure is located above the bottom insulation plate and forms an outer insulation structure arranged outside the hanger frame with the bottom insulation plate; the hanger frame includes multiple channels in parallel The longitudinal distribution beams laid out and the front beams and rear beams respectively arranged on the front and rear sides of the multiple longitudinal distribution beams, the longitudinal distribution beams are arranged along the longitudinal bridge direction of the concrete cast-in-place beams, the front beams and the rear beams They are all arranged along the transverse bridge direction of the concrete cast-in-place beam, and the multiple longitudinal distribution beams are arranged from left to right along the transverse bridge direction of the concrete cast-in-place beam and they are all arranged on the same plane; the front beam is located at the front lower beam and it is hung on the front lower beam by the front hanger or the front sling, and the rear beam is located directly below the rear lower beam and it is hung on the rear lower beam by the rear hanger or the rear sling Above; the leftmost longitudinal distribution beam among the multiple longitudinal distribution beams is the left distribution beam, and the rightmost longitudinal distribution beam among the multiple longitudinal distribution beams is the right distribution beam, and the temporary connection The device includes a plurality of left connecting rods connected between the left distribution beam and the hanging basket and a plurality of right connecting rods connected between the right distribution beam and the hanging basket.

The above-mentioned protective structure for the construction of the existing cast-in-place railway beam hanging basket on the upper span is characterized in that: the plurality of longitudinal distribution beams are all arranged in parallel with the bottom formwork.

The above-mentioned protective structure for the construction of the existing cast-in-place railway beam hanging basket on the upper span is characterized in that: a plurality of square timbers are arranged on the multiple longitudinal distribution beams from front to back, and the plurality of square timbers are all arranged on the same plane superior.

The above-mentioned protective structure for the construction of the existing cast-in-place railway beam hanging basket on the upper span is characterized in that: a layer of scaffolding boards are tiled on the plurality of square logs.

The above-mentioned protective structure for the construction of the existing cast-in-place railway beam hanging basket on the upper span is characterized in that: a plurality of square timbers are arranged along the transverse bridge direction of the concrete cast-in-place beam, and the top surface of the scaffold board is connected to the front beam and the rear beam. The top surface is even.

The above-mentioned protective structure for the construction of the existing cast-in-place railway beam hanging basket on the upper span is characterized in that: a layer of bottom steel plates are tiled on the bottom of the longitudinal distribution beams, and the bottom insulating board is tiled on the bottom of the bottom steel plates .

The above-mentioned protective structure for the construction of the existing cast-in-place railway beam hanging basket on the upper span is characterized in that: the bottom steel plate is provided with a waterproof layer.

The above-mentioned protective structure for the construction of the existing cast-in-place railway beam hanging basket on the upper span is characterized in that: the height of the side insulation structure is 1m to 1.5m; the inner side of the side insulation board is provided with a layer of side steel plates , the side steel plate is fixed on the outer wall of the hanger frame, and the side insulating plate is fixed on the side steel plate by a plurality of fastening bolts.

The above-mentioned protective structure for the construction of the existing cast-in-place railway beam hanging basket on the upper span is characterized in that: the left side beam and the right side side beam are respectively arranged on the left and right sides of the main truss, and the left side side beam and the right side side beam are arranged respectively. The right side beams are all arranged horizontally, the upper ends of the plurality of left connecting rods are fixed on the left side beam and the lower ends are fixed on the left side distribution beam, and the plurality of right side connecting rods are connected The upper ends of the rods are all fixed on the right longitudinal beam and the lower ends are fixed on the right side distribution beam; the longitudinal distribution beam is channel steel; the front beam and the rear beam are arranged in parallel by two The channel steel is composed; the left connecting rod and the right connecting rod are vertical connecting rods arranged vertically, and the vertical connecting rod is channel steel or steel pipe.

The above-mentioned protective structure for the construction of the existing cast-in-place railway beam hanging basket on the upper span is characterized in that: a plurality of left longitudinal connecting rods are arranged on the plurality of left connecting rods from top to bottom, and multiple left longitudinal connecting rods are arranged on the plurality of left connecting rods. The side connecting rods are fastened and connected as a whole through multiple left longitudinal connecting rods to form a left connecting frame, and the multiple left longitudinal connecting rods are arranged horizontally; A plurality of right longitudinal connecting rods are provided at the bottom, and the plurality of right longitudinal connecting rods are fastened and connected as a whole through the plurality of right longitudinal connecting rods to form a right connecting frame, and the plurality of right longitudinal connecting rods The rods are arranged horizontally; steel wire dense mesh is installed on the outside of the left connecting frame and the right connecting frame.

Compared with the prior art, the utility model has the following advantages:

1. The structure is simple, the design is reasonable, and the input cost is low. It consists of a protective hanger at the bottom of the hanging basket for construction of the cast-in-place beam and a temporary connection device for connecting the hanging basket and the protective hanger.

2. The protective hanger adopted has a simple structure, reasonable design, convenient disassembly and assembly, and good use effect. The load-bearing beams (specifically, the front beam and the rear beam) in the protective hanger are located above the longitudinal distribution beam, so that the protective hanger and the lower The safety distance between the catenary of the existing railway across is greatly increased, and the protective hanger and the bottom formwork of the hanging basket are arranged in parallel, which is not only conducive to drainage, but also can further increase the distance between the protective hanger and the existing bridge below. Safety distance between catenaries of railways

3. The connection between the front and rear beams of the protective hanger structure and the longitudinal distribution beam is convenient and reliable, which can effectively improve the overall rigidity and connection strength of the protective hanger structure.

4. The bottom and side of the protective hanger structure are closed with insulating plates. At the same time, a layer of bottom steel plates is set at the bottom of the bottom insulating plate, and a layer of side steel plates is set on the inner side of the side insulating plates. The bottom insulating plate and the bottom The steel plates and the side insulating plates and side steel plates are connected by fastening bolts, which is not only convenient for disassembly and assembly, but also reliable in connection and good in sealing effect, which can ensure the protective effect of the protective hanger.

5. There is a waterproof layer on the bottom steel plate, which is easy to install and can ensure the protective effect of the protective hanger.

6. The use effect is good and the practical value is high. The protective hanger is installed at the bottom of the hanging basket through a temporary connection device, and the surrounding of the protective hanger is insulated and sealed. It has the functions of waterproof, anti-electricity, fire prevention, and falling objects. During actual construction , the protective hanger is connected with the hanging basket as a whole, and moves forward together with the hanging basket. In addition, the protective hanger is easy to install, does not need to work above the existing line, can reduce the construction of the skylight blockade, and can effectively reduce the risk of electric shock and the safety hazard caused to the operation line. It has the advantages of convenient construction, fast construction speed, less consumables, and low cost. , good safety protection effect, safe and reliable construction process, etc., can effectively ensure the operation safety of existing railway lines, and have achieved significant economic and social benefits. Compared with the protective scaffolding, the utility model is superior to the large-span protective scaffolding in terms of material, process, measures and cost, and is more practical, economical and safe.

To sum up, the utility model has simple structure, reasonable design, convenient disassembly and assembly, good use effect, and can effectively solve the existing protective scaffolds with large span, many consumables, difficult erection and dismantling, low safety factor and high cost. , Long construction period and other issues.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Fig. 1 is a schematic diagram of the protective state of the existing protective scaffolding.

Fig. 2 is a reference diagram of the use state of the utility model.

FIG. 3 is a partially enlarged schematic diagram of A in FIG. 2 .

Explanation of reference signs:

1—concrete cast-in-place beam; 2—left longitudinal connecting rod; 3-1—main truss;

3-2—bottom template; 3-3—lower longitudinal beam; 3-4—front lower beam;

3-5—rear lower beam; 4-1—longitudinal distribution beam; 4-2—bottom insulation board;

4-3—front crossbeam; 4-4—rear crossbeam; 5—front suspender;

6—rear suspension rod; 7—left connecting rod; 8—square wood;

9—screw board; 10—left side beam; 12—protective scaffolding.

Detailed ways

As shown in Figures 2 and 3, the utility model includes a protective hanger installed at the bottom of the hanging basket for the construction of the cast-in-place beam and a temporary connection device for connecting the hanging basket with the protective hanger, The cast-in-place beam constructed is a concrete cast-in-place beam 1 spanning the existing railway line, and the concrete cast-in-place beam 1 is located above the existing railway line. The hanging basket is located at the front end of the poured beam section of the concrete cast-in-place beam 1, and the hanging basket includes a main truss 3-1 installed on the top of the beam body of the poured beam section, and a beam located at the poured beam section. The bottom template 3-2 at the bottom of the body and the bottom support frame supporting the bottom template 3-2, the bottom template 3-2 is located below the main truss 3-1. The bottom support frame is located below the bottom formwork 3-2, and the bottom support frame includes multiple lower longitudinal beams 3-3 arranged in parallel and front panels respectively located under the front and rear sides of the multiple lower longitudinal beams 3-3. The lower beam 3-4 and the rear lower beam 3-5, the lower longitudinal beam 3-3 is arranged along the longitudinal direction of the concrete cast-in-place beam 1, and the front lower beam 3-4 and the rear lower beam 3-5 are arranged along the The concrete cast-in-place beam 1 is arranged in the transverse bridge direction. The protective hanger includes a hanger frame, a bottom insulating plate 4-2 installed at the bottom of the hanger frame, and a side insulating structure surrounded by side insulating plates installed on the outer walls around the hanger frame , the side insulating structure is located above the bottom insulating plate 4-2 and forms an outer insulating structure arranged outside the hanger frame with the bottom insulating plate 4-2. The hanger frame includes multiple longitudinal distribution beams 4-1 arranged in parallel, and front beams 4-3 and rear beams 4-4 respectively arranged on the front and rear sides of the multiple longitudinal distribution beams 4-1. The longitudinal distribution beam 4-1 is arranged along the longitudinal bridge direction of the concrete cast-in-place beam 1, and the front beam 4-3 and the rear beam 4-4 are arranged along the transverse bridge direction of the concrete cast-in-place beam 1. The distribution beams 4-1 are arranged from left to right along the cross-bridge direction of the concrete cast-in-place beam 1 and are all arranged on the same plane. The front crossbeam 4-3 is located directly below the front lower crossbeam 3-4 and is hung on the front lower crossbeam 3-4 through the front suspension rod 5 or the front sling, and the rear crossbeam 4-4 is located at the rear lower crossbeam. Just below the crossbeam 3-5 and it hangs on the rear lower crossbeam 3-5 by the rear side suspension rod 6 or the rear side sling. The leftmost longitudinal distribution beam 4-1 among the multiple longitudinal distribution beams 4-1 is the left distribution beam, and the rightmost longitudinal distribution beam 4-1 among the multiple longitudinal distribution beams 4-1 For the distribution beam on the right side, the temporary connection device includes a plurality of left connecting rods 7 connected between the distribution beam on the left side and the hanging basket and a plurality of connecting rods 7 connected between the distribution beam on the right side and the hanging basket. right connecting rod between the baskets.

In this embodiment, the plurality of longitudinal distribution beams 4-1 are arranged parallel to the bottom template 3-2.

During actual construction, a plurality of square timbers 8 are arranged on the plurality of longitudinal distribution beams 4-1 from front to back, and the plurality of square timbers 8 are all arranged on the same plane.

In this embodiment, a layer of scaffolding boards 9 is tiled on the plurality of square logs 8 .

And, described scaffold board 9 is bamboo plywood.

During actual layout and installation, a plurality of square timbers 8 are arranged along the transverse direction of the concrete cast-in-place beam 1, and the top surface of the scaffolding board 9 is flush with the top surfaces of the front beam 4-3 and the rear beam 4-4.

In this embodiment, a layer of bottom steel plate is flatly laid on the bottom of the plurality of longitudinal distribution beams 4-1, and the bottom insulating plate 4-2 is flatly laid on the bottom of the bottom steel plate.

In addition, the thickness of the bottom steel plate was 3 mm. The bottom insulating plate 4-2 is fixed on the bottom steel plate by a plurality of fastening bolts.

In this embodiment, a layer of side steel plates are arranged on the inside of the side insulating plates, and the side steel plates are fixed on the outer wall of the hanger frame, and the side insulating plates are fixed on the on the side steel plate. In addition, the thickness of the side steel plate was 3 mm.

In this embodiment, a waterproof layer is provided on the bottom steel plate.

In this embodiment, the height of the side insulation structure is 1m˜1.5m.

During actual construction, the longitudinal distribution beam 4-1 is channel steel. Both the front beam 4-3 and the rear beam 4-4 are composed of two parallel channel steels.

In this embodiment, the upper ends of the left connecting rod 7 and the right connecting rod are both fixed on the hanging basket by connecting bolts. Therefore, the actual assembly and disassembly is very simple, and the connection is reliable.

In this embodiment, the left and right sides of the main truss 3-1 are respectively provided with a left side beam 10 and a right side side beam, and the left side side beam 10 and the right side side beam are arranged horizontally. The upper ends of the left connecting rods 7 are all fixed on the left longitudinal beam 10 or the main truss 3-1 and the lower ends thereof are fixed on the left distribution beam, and the upper ends of the multiple right connecting rods are It is fixed on the right longitudinal beam and its lower end is fixed on the right distribution beam.

In this embodiment, both the left connecting rod 7 and the right connecting rod are vertical connecting rods arranged vertically, and the vertical connecting rods are channel steel or steel pipe.

During actual construction, multiple left connecting rods 7 are provided with multiple left longitudinal connecting rods 2 from top to bottom, and multiple left connecting rods 7 are tightened by multiple left longitudinal connecting rods 2. It is fixedly connected as a whole and forms a left connecting frame, and the plurality of left longitudinal connecting rods 2 are arranged horizontally; the plurality of right connecting rods are arranged with a plurality of right longitudinal connecting rods from top to bottom, and multiple The right connecting rod is fastened and connected as a whole by multiple right longitudinal connecting rods to form a right connecting frame, and the multiple right longitudinal connecting rods are all arranged horizontally. Steel wire dense mesh is installed on the outside of the left connecting frame and the right connecting frame.

In this embodiment, the front lower beam 3-4 is hung on the main truss 3-1 by steel straps, and the rear lower beam 3-5 is hung on the main truss 3-1 by steel straps or the poured on the beam section;

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (10)

1. a upper spanning existing railway cast-in-place beam cradle construction safeguard structure, it is characterized in that: comprise the safety cradle and the temporary connecting device that described Hanging Basket is connected with described safety cradle that are arranged on the cradle bottom that constructed Cast-in-situ Beam is constructed, Cast-in-situ Beam of constructing be cross over the cast-in-situ concrete beam (1) of existing railway line, and cast-in-situ concrete beam (1) is positioned at above described existing railway line, described Hanging Basket is positioned at the section of the casting beams front end of cast-in-situ concrete beam (1), described Hanging Basket comprise be installed on described in the beam body top of casting beams section main couple (3-1), be positioned at described in casting beams section beam body bottom soffit formwork (3-2) and bottom support frame that soffit formwork (3-2) is supported, described soffit formwork (3-2) is positioned at main couple (3-1) below, described bottom support chord position is in soffit formwork (3-2) below, described bottom support frame comprises lower longeron (3-3) that multiple tracks is parallel laying and lays respectively at front lower transverse beam (3-4) and the rear lower transverse beam (3-5) of down either side before and after lower longeron (3-3) described in multiple tracks, described lower longeron (3-3) is along the vertical bridge of cast-in-situ concrete beam (1) to laying, and described front lower transverse beam (3-4) and rear lower transverse beam (3-5) are all laid along the direction across bridge of cast-in-situ concrete beam (1), the sidepiece insulation system that described safety cradle comprises suspension bracket skeleton, is arranged on the bottom insulation plate (4-2) bottom described suspension bracket skeleton and surrounded by the sidepiece insulating slab be arranged on described suspension bracket skeleton surrounding lateral wall, described sidepiece insulation system is positioned at bottom insulation plate (4-2) top and itself and bottom insulation plate (4-2) form the outside insulation system be laid in outside described suspension bracket skeleton, described suspension bracket skeleton comprises the longitudinal distribution beam (4-1) and the front beam (4-3) be laid in respectively before and after longitudinal distribution beam (4-1) described in multiple tracks above both sides and rear cross beam (4-4) that multiple tracks is parallel laying, described longitudinal distribution beam (4-1) is along the vertical bridge of cast-in-situ concrete beam (1) to laying, described front beam (4-3) and rear cross beam (4-4) are all laid along the direction across bridge of cast-in-situ concrete beam (1), longitudinal distribution beam (4-1) described in multiple tracks to be laid and it is all laid on same plane from left to right along the direction across bridge of cast-in-situ concrete beam (1), described front beam (4-3) is positioned at immediately below front lower transverse beam (3-4) and it is hung on front lower transverse beam (3-4) by front side suspension rod (5) or front side hoist cable, and described rear cross beam (4-4) is positioned at immediately below rear lower transverse beam (3-5) and it is hung on rear lower transverse beam (3-5) by rear side suspension rod (6) or rear side hoist cable, the longitudinal distribution beam (4-1) being positioned at the leftmost side in longitudinal distribution beam (4-1) described in multiple tracks is left side distribution beam, the longitudinal distribution beam (4-1) being positioned at the rightmost side in longitudinal distribution beam (4-1) described in multiple tracks is right side distribution beam, and described temporary connecting device comprises many and is connected to left-side connecting bar (7) between described left side distribution beam and described Hanging Basket and the many right-side connecting bar be connected between described right side distribution beam and described Hanging Basket.

2., according to spanning existing railway cast-in-place beam cradle construction safeguard structure in one according to claim 1, it is characterized in that: longitudinal distribution beam (4-1) described in multiple tracks all with soffit formwork (3-2) in parallel laying.

3. according to spanning existing railway cast-in-place beam cradle construction safeguard structure in the one described in claim 1 or 2, it is characterized in that: longitudinal distribution beam (4-1) described in multiple tracks is provided with from front to back multiple lumps of wood (8), multiple described lumps of wood (8) is all laid on same plane.

4. according to spanning existing railway cast-in-place beam cradle construction safeguard structure in one according to claim 3, it is characterized in that: the upper tiling of multiple described lumps of wood (8) has one deck scaffold floor (9).

5. according to spanning existing railway cast-in-place beam cradle construction safeguard structure in one according to claim 4, it is characterized in that: multiple described lumps of wood (8) is laid along the direction across bridge of cast-in-situ concrete beam (1), and the end face of described scaffold floor (9) is mutually concordant with the end face of rear cross beam (4-4) with front beam (4-3).

6. according to spanning existing railway cast-in-place beam cradle construction safeguard structure in the one described in claim 1 or 2, it is characterized in that: longitudinal distribution beam (4-1) bottom tiling described in multiple tracks has steel plate at the bottom of one deck, and described bottom insulation plate (4-2) is laid in bottom steel plate of the described end.

7., according to spanning existing railway cast-in-place beam cradle construction safeguard structure in one according to claim 6, it is characterized in that: steel plate of the described end is provided with one deck waterproofing course.

8. according to spanning existing railway cast-in-place beam cradle construction safeguard structure in the one described in claim 1 or 2, it is characterized in that: the height of described sidepiece insulation system is 1m ~ 1.5m; The inner side of described sidepiece insulating slab is provided with one deck side steel plate, and described side Interal fixation is on the lateral wall of described suspension bracket skeleton, and described sidepiece insulating slab is fixed on the steel plate of described side by multiple fastening bolt.

9. according to spanning existing railway cast-in-place beam cradle construction safeguard structure in the one described in claim 1 or 2, it is characterized in that: the left and right sides of described main couple (3-1) is respectively arranged with left-hand stringer (10) and right-hand stringer, described left-hand stringer (10) and described right-hand stringer are all laid in level, the upper end of many described left-side connecting bar (7) is all fixed on that left-hand stringer (10) is upper and its lower end is all fixed in the distribution beam of described left side, the upper end of many described right-side connecting bar is all fixed in described right-hand stringer and its lower end and is all fixed in the distribution beam of described right side, described longitudinal distribution beam (4-1) is channel-section steel, described front beam (4-3) and rear cross beam (4-4) form by two channel-section steels in parallel laying, described left-side connecting bar (7) and described right-side connecting bar are in the vertical vertical link to laying, and described vertical link is channel-section steel or steel pipe.

10. according to spanning existing railway cast-in-place beam cradle construction safeguard structure in the one described in claim 1 or 2, it is characterized in that: many described left-side connecting bar (7) are provided with longitudinal rod on the left of multiple tracks (2) from top to bottom, left-side connecting bar described in multiple tracks (7) is fastenedly connected by left side longitudinal rod (2) described in multiple tracks and is integrated and forms left side link, and described in multiple tracks, left side longitudinal rod (2) is all laid in level; Many described right-side connecting bar are provided with longitudinal rod on the right side of multiple tracks from top to bottom, and right-side connecting bar described in multiple tracks is fastenedly connected by right side longitudinal rod described in multiple tracks and is integrated and forms right side link, and described in multiple tracks, right side longitudinal rod is all laid in level; Outside described left side link and described right side link, steel wire Dense mesh screen is all installed.