Bailey trestle steel pipe pile construction safety operation platform and construction method

Abstract

The invention discloses a bailey trestle steel pipe pile construction safety operation platform and a construction method. The safety operation platform mainly comprises a telescopic guide frame, an upper layer operation platform and a lower layer operation platform, wherein the upper layer operation platform and the lower layer operation platform are matched with the telescopic guide frame. The safety operation platform is installed at the front end of the bailey beam, and an operator can complete all work such as guiding, positioning, inserting and beating, cutting, installation of a cross brace and a diagonal bracing and installation of a load-bearing cross beam on the operation platform. After the work is completed, firstly, the inner-side upper-layer platform, the outer-side upper-layer platform and the outer-side lower-layer platform are dismantled, then the horizontal rod of the guide frame is retracted, and finally the guide frame and the inner-side lower-layer platform are integrally hoisted away from the steel pipe pile through a crane. The operation platform adopts an assembly type design, and is mounted and dismounted separately, so that high-risk behaviors such as adopting a crane to hoist an operator in an existing construction method are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel pipe Bailey bridge construction, in particular to a Bailey bridge steel pipe pile construction safety operation platform and a construction method. BACKGROUND

[0002] In the process of steel pipe Bailey bridge construction, the steel pipe pile construction needs to use a guide frame to assist in positioning and guiding the steel pipe pile. At the same time, in order to ensure the safety of construction personnel, an operation platform needs to be installed on the guide frame to facilitate the work of the workers in measuring and positioning, cutting the steel pipe pile, welding the cross brace and scissors brace, welding the pile head stiffener plate, installing the load-bearing cross beam, and other work.

[0003] The steel pipe pile construction process includes lifting operation, water operation, high-altitude operation, and fire operation, and the construction safety risk is high. Therefore, the safety management of the steel pipe pile construction process is a key link in the safety management of the bridge construction process.

[0004] In the existing construction method, the horizontal rod of the guide frame needs to pass through the space where the steel pipe pile cross brace and scissors brace are located in the bridge direction, and is located below the load-bearing cross beam. The operation platform is arranged on both sides of the steel pipe pile in the bridge direction. Therefore, the guide frame and the operation platform intersect and interfere with the subsequent steel pipe pile cross brace and scissors brace, pile head stiffener plate, and load-bearing cross beam in space, and the subsequent work cannot be completed without retaining the guide frame and the operation platform. Therefore, the construction is generally carried out according to the following method (see Figures 1-5 ; Figure 1 Steel pipe pile insertion and cutting, Figure 2 Removal of guide frame and operation platform, Figure 3 Hoisting of operation platform, Figure 4 Installation of cross brace, scissors brace, and load-bearing beam, Figure 5 Removal of operation platform):

[0005] Step one: steel pipe pile insertion and cutting of pile head are completed;

[0006] Step two: remove the guide frame and the operation platform;

[0007] Step three: the operation platform (people ride the operation platform) is hoisted by the crane to the steel pipe column, and the operation platform is hung on the steel pipe column pile head through the steel wire rope and the shackle to form a fixed operation platform; or the crane is used for long-time hoisting operation platform for operation;

[0008] Step four: weld the cross brace and scissors brace, the pile head stiffener plate, and install the load-bearing cross beam. Use chain hoist or use the crane to assist in lowering the operation platform to different heights for welding of the cross brace;

[0009] Step five: after the completion of the steel pipe column construction, the workers in the operation platform are hoisted to the bridge by the crane.

[0010] In the existing construction method, the operating personnel cannot complete all the work of the steel pipe pile construction in a safe operation platform at one time, and need to be hoisted to the steel pipe pile by a crane for operation. This behavior of "using a crane to transport personnel" violates the safety management regulations such as article 4.1.17 of "Construction Machinery Construction Safety Technical Regulations" (JGJ33-2012), and the lifting action of the platform needs to be assisted by a chain hoist and a crane in the construction process, which is a relatively complicated process and has high safety risks. SUMMARY

[0011] Therefore, in order to solve the above problems, the present application provides a Bailey bridge steel pipe pile construction safety operation platform and a construction method. The structure and construction method of the safety operation platform for the operating personnel in the whole process of the construction of the Bailey bridge from the steel pipe pile insertion to the installation of the pile top beam are solved, and the unsafe behavior of the operating personnel in the existing construction method, i.e. the operating personnel need to ride a crane to reach the steel pipe pile position by a hanging basket for operation, is avoided.

[0012] The present application is implemented in the following manner. A Bailey bridge steel pipe pile construction safety operation platform is constructed, and the safety operation platform mainly comprises a telescopic guide frame and upper and lower operation platforms matched with the guide frame. The safety operation platform is installed in sections at the front end of the Bailey beam, and the operating personnel can complete all the work such as steel pipe guiding, positioning, insertion, cutting, installation of cross bracing and scissors bracing, and installation of load-bearing cross beams on the operation platform. After the above work is completed, the inner and outer upper platforms and the outer lower platform are removed, the horizontal rod of the guide frame is retracted, and finally the guide frame and the inner lower platform are hoisted away from the steel pipe pile by a crane. The operation platform is designed in a fabricated manner, and the installation and removal are performed in sections, so that the high-risk behavior such as "hoisting the operating personnel by a crane" in the existing construction method is avoided.

[0013] According to the Bailey bridge steel pipe pile construction safety operation platform, the composition of the safety operation platform comprises a telescopic guide frame, an operation platform, and a ladder; and the safety operation platform is mainly welded from channel steel, square steel, and steel plates. During construction, the operating personnel can reach all positions of the platform through the straight ladder.

[0014] The operation platform comprises a lower platform and an upper platform. The lower platform comprises four inner and outer platforms. The upper platform comprises two inner and outer platforms and a platform passage. The lower platform is hung on the horizontal rod of the guide frame through the horizontal rod at the top, and the upper platform is placed on the horizontal rod of the guide frame and connected to the horizontal rod of the guide frame by bolts. The inner upper and lower platforms are connected to the outer rod of the horizontal rod of the guide frame, and the outer upper and lower platforms are connected to the inner rod of the horizontal rod of the guide frame.

[0015] The safety operation platform for the construction of the steel pipe pile of the Bailey bridge according to the application is characterized in that the telescopic guide frame is the most critical component of the safety operation platform, mainly comprising vertical rods, horizontal rods, inclined rods, guide frames and telescopic devices;

[0016] The guide frame is a square frame welded from a section steel, and the inner side length is 20-30 mm larger than the outer diameter of the corresponding steel pipe pile, so as to realize the functions of positioning and guiding the steel pipe pile.

[0017] The vertical rods, the horizontal rods and the inclined rods are processed and welded into a triangle from a channel steel or a square steel, and serve as the bearing structure of the operation platform and are connected with the Bailey beam through an ear plate (pin shaft connection).

[0018] The horizontal rod of the guide frame is composed of two nested square steel pipes, i.e., an outer rod and an inner rod, which can move relative to each other under the action of external force. The telescopic device provides power for the relative movement of the inner rod and the outer rod, and comprises a bidirectional jack, a pull rod, a nut, a sleeve and a beam, etc. The piston rod of the bidirectional jack is pushed out and retracted, and the force is transmitted to the high-frequency welded steel pull rod through the beam and the tension nut, so as to push or pull the inner rod to move in the outer rod, thereby realizing the telescoping of the horizontal rod of the guide frame.

[0019] The safety operation platform for the construction of the steel pipe pile of the Bailey bridge according to the application is characterized in that;

[0020] The telescoping and retracting process of the guide frame is as follows:

[0021] The telescoping process of the guide frame is as follows:

[0022] Step 1: connect the pull rod, the nut and the beam, extend the piston rod of the bidirectional jack, connect the beam and retract it, transmit the pushing force to the high-frequency welded steel pull rod on both sides, and finally push the inner rod out of the outer rod;

[0023] Step 2: after the inner rod is extended to the designed length, stop the action of the jack, install the guide frame, insert the middle bolt of the inner and outer rods, and limit the relative movement of the inner and outer rods.

[0024] The telescoping and retracting process of the guide frame is as follows:

[0025] Step 1: connect the pull rod, the nut and the beam, extend the piston rod of the bidirectional jack, connect the beam and retract it, transmit the pushing force to the high-frequency welded steel pull rod on both sides, and finally push the inner rod out of the outer rod;

[0026] Step 2: after the inner rod is extended to the designed length, stop the action of the jack, install the guide frame, insert the middle bolt of the inner and outer rods, and limit the relative movement of the inner and outer rods.

[0027] A construction method of the construction safety operation platform of the Bailey trestle steel pipe pile according to the above, characterized in that; the process of using the above safety operation platform for steel pipe pile construction specifically includes;

[0028] (1) the installation process of the safety operation platform is;

[0029] Step one: install the upper ladder to the guide frame, the crane lifts the guide frame, the horizontal rod of the guide frame is inserted through the crossbar at the top of the lower inner platform, and the lower inner platform is hung on the guide frame;

[0030] Step two: the crane installs the assembled guide frame to the front end of the Bailey beam;

[0031] Step three: use the crane to install the remaining operation platform to the guide frame and reliably connect;

[0032] (2) steel pipe pile construction on the safety operation platform;

[0033] After the safety operation platform is installed, the steel pipe pile insertion, pile head cutting, cross brace and scissors brace installation (once hoisted after being welded into a whole), pile head stiffening plate welding, and load-bearing beam installation can be sequentially completed on the platform; the cross brace and scissors brace and the load-bearing beam are hoisted into the design position from the space between the inner and outer platforms;

[0034] (3) safety operation platform disassembly;

[0035] Step one: use the crane to remove the inner and outer upper operation platforms and the outer lower platform;

[0036] Step two: retract the horizontal rod of the guide frame;

[0037] Step three: first, use the crane to hoist the guide frame, ladder, and inner lower platform away for disassembly; then, separate the inner lower platform from the guide frame and stack it (this process is the reverse of the installation process).

[0038] The present application has the following advantages: using the construction safety operation platform and the construction method proposed in the present application, the operating personnel can complete all the work of steel pipe guiding, positioning, insertion, cutting, cross brace and scissors brace installation, load-bearing beam installation, etc. on the safety operation platform, and finally the operation platform is disassembled in parts. During the entire construction process of the steel pipe pile, the operating personnel are working on a reliable operation platform, avoiding high-risk behaviors such as "crane hoisting operating personnel" in the existing construction method. The safety of trestle construction work is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 Steel pipe pile insertion and cutting schematic diagram;

[0040] Figure 2Schematic diagram of guide frame and operating platform dismantling;

[0041] Figure 3 Schematic diagram of the hoisting operation platform;

[0042] Figure 4 Schematic diagram of installation of cross braces, scissor braces, and load-bearing beams;

[0043] Figure 5 Schematic diagram of the dismantling operation platform;

[0044] Figure 6 Safe operation platform structure diagram;

[0045] Figure 7 Retractable guide frame structure diagram;

[0046] Figure 8 Expansion joint structure diagram;

[0047] Figure 9 Structural diagram of precision-rolled threaded steel tie rod;

[0048] Figure 10 Schematic diagram of the guide frame extension process;

[0049] Figure 11 Schematic diagram of the guide frame retraction process;

[0050] Figures 12-13 This is a schematic diagram illustrating the installation process of the safe operation platform;

[0051] Figure 14 Construction process diagram;

[0052] Figure 15 Schematic diagram of completed steel pipe pile construction;

[0053] Figure 16 A schematic diagram of step one of the demolition process;

[0054] Figure 17 Schematic diagram of demolition step two;

[0055] Figure 18 Schematic diagram of demolition step three. Detailed Implementation

[0056] The following will be combined with the appendix Figures 1-18 This invention will be described in detail, and the technical solutions in the embodiments of this invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0057] The present application provides a Bailey bridge steel pipe pile construction safety operation platform and a construction method; as shown in the figure, the safety operation platform mainly comprises a telescopic guide frame and upper and lower operation platforms matched with the guide frame. The safety operation platform is installed in sections at the front end of the Bailey beam, and the workers can complete all the work such as steel pipe guiding, positioning, driving, cutting, cross bracing and shear bracing installation, and load-bearing cross beam installation on the operation platform. After the above work is completed, the inner and outer upper platforms and the outer lower platform are removed first, then the horizontal rod of the guide frame is retracted, and finally the guide frame and the inner lower platform are lifted away from the steel pipe pile by a crane. The operation platform is designed in a modular manner, and the installation and removal are carried out in sections, avoiding the high-risk behavior of "lifting workers by a crane" in the existing construction method.

[0058] I. Structure of the safety operation platform

[0059] (1) Composition of the safety operation platform

[0060] As shown in the figure, the safety operation platform mainly comprises a telescopic guide frame, an operation platform, and a ladder. It is mainly welded by channel steel, square steel, and steel plate. During construction, workers can reach all positions on the platform through the straight ladder.

[0061] The operation platform includes a lower platform and an upper platform. The lower platform is divided into four inner and outer platforms, and the upper platform includes two inner and outer platforms and a platform passage. The lower platform is hung on the horizontal rod of the guide frame by the top cross rod, and the upper platform is placed on the horizontal rod of the guide frame and connected to the horizontal rod of the guide frame by bolts. Among them, the inner upper and lower platforms are connected to the outer rod of the horizontal rod of the guide frame, and the outer upper and lower platforms are connected to the inner rod of the horizontal rod of the guide frame.

[0062] (2) Structure of the telescopic guide frame

[0063] The telescopic guide frame is the most critical component of the safety operation platform described in the present patent, and its structure is shown in the figure. It mainly comprises vertical rods, horizontal rods, inclined rods, guide frames, and telescopic devices (see figure).

[0064] Among them, the guide frame is a square frame welded by profile steel, and the inner edge length is 20-30mm larger than the outer diameter of the corresponding steel pipe pile, realizing the functions of steel pipe pile positioning and guiding.

[0065] The vertical rods, horizontal rods, and inclined rods are processed and welded into a triangle shape by channel steel or square steel. As the load-bearing structure of the operation platform, they are connected to the Bailey beam through ear plates (pin shaft connection).

[0066] The horizontal rod of the guide frame is a two-nested square steel pipe, which is divided into an outer rod and an inner rod. Under the action of external force, the outer rod and the inner rod can move relatively. The telescopic device (see Figure 8) is powered by the relative movement of the inner and outer rods, including bidirectional jack, pull rod, nut, sleeve, beam, etc. The bidirectional jack piston rod pushes out and retracts, and the force is transmitted to the rolled thread steel pull rod through the beam and tension nut, thereby pushing or pulling the inner rod to move in the outer rod, realizing the extension and retraction of the horizontal rod of the guide frame.

[0067] The extension and retraction process of the guide frame is as follows Figures 10-11 ; Figure 10 The extension process of the guide frame, Figure 11 The retraction process of the guide frame;

[0068] The extension process of the guide frame;

[0069] Step one: connect the pull rod, nut and beam, extend the bidirectional jack piston rod, connect the beam and retract, transmit the pushing force to the rolled thread steel pull rod on both sides, and finally push the inner rod out of the outer rod;

[0070] Step two: when the inner rod reaches the designed length, stop the action of the jack, install the guide frame, insert the middle bolt of the inner and outer rods, and limit the relative movement of the inner and outer rods;

[0071] The retraction process of the guide frame;

[0072] Step one: connect the pull rod, nut and beam, extend the bidirectional jack piston rod, connect the beam and retract, transmit the pushing force to the rolled thread steel pull rod on both sides, and finally push the inner rod out of the outer rod;

[0073] Step two: after the inner rod is retracted into the outer rod, insert the tail bolt to limit the relative movement of the inner and outer rods; rotate the connecting sleeve to separate the pull rod from the segmented line, and use the crane to lift out the pull rod A section and the beam for proper fixing and storage.

[0074] The process of steel pipe pile construction using the safety operation platform of the present patent will be described in detail below.

[0075] (1) Installation of safety operation platform;

[0076] As shown in Figure 12 and Figure 13 , the installation process of the operation platform is as follows:

[0077] Step one: install the upper ladder to the guide frame, use the crane to lift the guide frame, pass the horizontal rod of the guide frame through the horizontal rod on the top of the lower inner platform, and hang the lower inner platform to the guide frame;

[0078] Step two: use the crane to install the assembled guide frame to the end of the front end beam;

[0079] Step three: use the crane to install the remaining operation platform to the guide frame and reliably connect them.

[0080] (2) Steel pipe pile construction on the safe operation platform;

[0081] After the safe operation platform is installed, the steel pipe pile is inserted and driven, the pile head is cut, the cross brace and scissors brace are installed (welded into a whole and hoisted at one time), the pile head stiffening plate is welded, and the bearing cross beam is installed on the platform in sequence. The cross brace, scissors brace and bearing cross beam are hoisted into the design position from the space between the inner and outer platforms. Figure 14 Construction process diagram, Figure 15 Steel pipe pile construction is completed.

[0082] (3) Safe operation platform dismantling;

[0083] Step one: the inner and outer upper operation platforms and the outer lower platform are dismantled by using a crane; Figure 16 Dismantling step one;

[0084] Step two: the horizontal rod of the guide frame is retracted; Figure 17 Dismantling step two;

[0085] Step three: first, the guide frame, ladder and inner lower platform are hoisted away by using a crane; then, the inner lower platform is separated from the guide frame and stacked (this process is the reverse of the installation process). Figure 18 Dismantling step three.

[0086] The patent has the following advantages: using the construction safe operation platform and the construction method proposed in the patent, the operating personnel can complete all the work such as steel pipe guiding, positioning, insertion, cutting, cross brace and scissors brace installation, and bearing cross beam installation on the safe operation platform, and finally the operation platform is dismantled in sections. During the entire steel pipe pile construction process, the operating personnel are working on reliable operation platforms, avoiding high-risk behaviors such as "crane hoisting operating personnel" in the existing construction method. The safety of the trestle construction operation is greatly improved.

[0087] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A safe operating platform for the construction of steel pipe piles for Bailey bridges, characterized in that... ； The safety operation platform mainly consists of a retractable guide frame and two compatible upper and lower operation platforms. The safety operation platform is installed in sections at the front end of the Bailey beam. Workers can complete all tasks on the operation platform, including guiding, positioning, driving, cutting, installing cross braces and scissor braces, and installing load-bearing beams. After these tasks are completed, the inner and outer upper platforms and the outer lower platform are first dismantled. Then, the horizontal bars of the guide frame are retracted, and finally, a crane is used to lift the guide frame and the inner lower platform as a whole away from the steel pipe pile. This operation platform adopts a prefabricated design, with installation and dismantling carried out in sections, avoiding the high-risk behavior of "lifting workers with a crane" as in existing construction methods.

2. The Bailey bridge steel pipe pile construction safety operation platform according to claim 1, characterized in that; The safety operation platform consists of a telescopic guide frame, an operating platform, and a ladder; it is mainly constructed from welded channel steel, square steel, and steel plates; during construction, workers can access various positions on the platform via the straight ladder. The operating platform includes a lower platform and an upper platform; the lower platform is divided into four platforms, inner and outer; the upper platform includes two platforms, inner and outer, and a platform passage; the lower platform is suspended from the guide frame horizontal bar by a top crossbar, and the upper platform is placed on the guide frame horizontal bar and connected to the guide frame horizontal bar by bolts; the inner upper and lower platforms are connected to the outer bars of the guide frame horizontal bar, and the outer upper and lower platforms are connected to the inner bars of the guide frame horizontal bar.

3. The Bailey bridge steel pipe pile construction safety operation platform according to claim 1, characterized in that; The telescopic guide frame is the most critical component of the aforementioned safe operating platform, and mainly includes vertical bars, horizontal bars, diagonal braces, guide frames, and telescopic devices; The guide frame is made of steel welded into a square frame, with the inner side length being 20-30mm larger than the outer diameter of the corresponding steel pipe pile, so as to realize the functions of positioning and guiding the steel pipe pile. The vertical, horizontal, and diagonal braces are made of channel steel or square steel and welded into triangles; they serve as the load-bearing structure of this operating platform and are connected to the Bailey beams via ear plates (pin connection); The guide frame horizontal bar consists of two nested square steel tubes, divided into an outer bar and an inner bar. Under the action of external force, the outer bar and the inner bar can move relative to each other. The telescopic device provides power for the relative movement of the inner and outer bars and includes a two-way jack, a tie rod, a nut, a sleeve, and a spreader beam. The piston rod of the two-way jack extends and retracts, and the force is transmitted to the threaded steel tie rod through the spreader beam and tension nut, thereby pushing or pulling the inner bar to move within the outer bar, realizing the telescopic movement of the guide frame horizontal bar.

4. The safety operation platform for Bailey bridge steel pipe pile construction according to claim 2, characterized in that... ； The extension and retraction process of the guide frame is as follows: The process of guide frame extension; Step 1: Connect the tie rod, nut, and spreader beam. The piston rod of the double-sided jack extends, connects to the spreader beam, and retracts, transferring the thrust to the two precision-rolled threaded steel tie rods on both sides, ultimately pushing the inner rod to extend out of the outer rod. Step 2: After the inner rod extends to the designed length, the jack stops moving, the guide frame is installed, and the bolts in the middle of the inner and outer rods are inserted to restrict the relative movement of the inner and outer rods; The guide frame retraction process; Step 1: Connect the tie rod, nut, and spreader beam. The piston rod of the double-sided jack is pushed out, and the thrust is transmitted to the two precision-rolled threaded steel tie rods on both sides through the spreader beam, which finally pulls the inner rod back into the outer rod. Step 2: After the inner rod retracts into the outer rod, insert the tail bolt to restrict the relative movement of the inner and outer rods; rotate the connecting sleeve to separate the tie rod from the segment line, and use a crane to lift out the tie rod section A and the spreader beam for proper securing and storage.

5. A construction method for a safety operation platform for Bailey bridge steel pipe pile construction according to claim 1, characterized in that; The process of constructing steel pipe piles using the aforementioned safe operating platform specifically includes: (1) The installation process of the safe operation platform is as follows; Step 1: Install the upper ladder onto the guide frame. The crane lifts the guide frame, and the horizontal bar of the guide frame passes through the crossbar at the top of the lower inner platform. The lower inner platform is then hung onto the guide frame. Step 2: Use a crane to install the assembled guide frame onto the end of the front Bailey beam; Step 3: Use a crane to install the remaining operating platform onto the guide frame and reliably connect it; (2) Steel pipe pile construction is carried out on a safe operating platform; After the safety operation platform is installed, the following tasks can be completed on the platform in sequence: driving steel pipe piles, cutting pile heads, installing cross braces and scissor braces (which are welded into a whole and then hoisted in one go), welding pile head stiffening plates, and installing load-bearing beams; the cross braces, scissor braces, and load-bearing beams are all hoisted into the designed positions from the space between the inner and outer platforms; (3) Dismantling of the safe operating platform; Step 1: Use a crane to dismantle the inner and outer upper operating platforms and the outer lower platform; Step 2: Retract the horizontal bar of the guide frame; Step 3: First, use a crane to lift the guide frame, ladder, and inner lower platform as a whole away from the front end of the trestle; then, detach the inner lower platform from the guide frame and stack it (this process is the reverse of the installation process).

Images