CN105113803B - A high-altitude sliding hoisting device and its implementation method for a mountain corridor truss - Google Patents

Abstract

The invention discloses a high-altitude sliding hoisting device of a corridor truss of a mountain and an implementing method of the high-altitude sliding hoisting device. The problem that a crane hoisting mode or a climbing pole hoisting mode cannot be used in a cliffy mountain in the prior art is solved. The high-altitude sliding hoisting device of the corridor truss of the mountain comprises supports, a sliding frame, a sliding rope and a traction mechanism; the supports are arranged at two ends of a mounting platform; the sliding frame is arranged on the top of the mounting platform and consists of upright columns; the sliding rope and the traction mechanism are used with the sliding frame; a crossbeam is arranged on tops of each two upright columns at the same end; rib plates with through holes are arranged on each crossbeam and are close to positions where the crossbeam is connected with the corresponding upright columns; the sliding rope penetrates in the rib plates on the tops of two ends of the sliding frame; two tips of the sliding rope are anchored to the support; and the corridor truss is positioned in the sliding frame, is dragged by the traction mechanism, and moves on the sliding rope through a movable pulley mounted on the sliding rope. By the high-altitude sliding hoisting device, technology quality of manufacturing assembly and hoisting of the corridor truss is ensured, construction safety and precision are ensured, construction cost is reduced greatly, and construction period is shortened.

Description

A high-altitude sliding hoisting device and its implementation method for a mountain corridor truss

technical field

The invention relates to the field of installation and lifting of steel structure trusses in corridors, in particular to a high-altitude sliding lifting device for corridor trusses in mountainous areas and a realization method thereof.

Background technique

Raw material transportation is an important process in cement industry production, and most limestone raw material mining areas and cement clinker production lines are different due to their respective operating conditions and geographical topography, limestone raw materials need to be installed and transported through overhead corridors and tunnels The system transports the raw materials to the raw material storage yard. In the prior art, the equipment required for the installation and lifting of the truss has a large structure and complex equipment, and is not suitable for installation and construction in high-altitude corridors with complex terrain in mountainous areas. The actual implementation and application are inconvenient, low in efficiency, and easy to delay the construction period.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned defects, and provide a high-altitude sliding hoisting device for mountain corridor trusses with simple structure, convenient implementation, reduced construction area, saving transportation costs, and high construction efficiency.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

A high-altitude sliding hoisting device for a mountain corridor truss, including brackets installed at both ends of the installation platform, a sliding frame arranged on the top of the installation platform and composed of columns, a sliding cable used in conjunction with the sliding frame, and a traction mechanism A crossbeam is installed on the top of the two columns at the same end, and a rib plate with a through hole is arranged on the crossbeam near its connection with the column, and the slide cable passes through the two ends of the sliding frame The ribs on the top and both ends are anchored on the bracket, the corridor truss is located in the sliding frame and is pulled by the traction mechanism, and moves on the sliding cable through the movable pulley installed on the sliding cable .

Further, the traction mechanism includes a hoist arranged on one of the brackets, and a fixed pulley arranged on the other bracket, and the traction rope of the hoist is connected to the gallery truss after bypassing the fixed pulley.

Further, the fixed pulley is arranged in the center, so that the traction rope of the hoist coincides with the center line of the gallery truss.

Further, slings are provided at the ends of the lower chords on both sides of the corridor truss, and the traction cables of the hoist move the corridor truss through the slings.

Further, a number of support columns are also provided at the lower part of the installation platform.

Further, the support column is anchored by a cable wind rope.

Further, a railing post is set every three meters on the upper part of the installation platform.

Further, the sliding frame is also provided with safety ropes for connecting construction workers.

Further, the corridor truss is connected to the movable pulley through an inverted chain hoist.

The above-mentioned method for realizing the high-altitude sliding hoisting device of a truss in a corridor in a mountainous area comprises the following steps:

(1) The steps of building brackets at both ends of the installation platform;

(2) The step of building a sliding frame through columns on the top of the installation platform;

(3) Weld the rib plate on the top of the sliding frame, pass the slide cable through the rib plate and anchor the two ends along the sliding direction to fix it on the bracket;

(4) The step of installing the traction mechanism on the bracket;

(5) Steps for assembling corridor trusses on the installation platform;

(6) Segment the corridor truss into several truss units;

(7) The step of connecting the truss unit with the movable pulley on the slide cable with an inverted chain hoist;

(8) The step of connecting the truss unit by the traction mechanism;

(9) Manually cooperate with the traction mechanism to continuously slide the truss unit until the truss unit slides to the installation position;

(10) Repeat steps (7) to (9) to slide all truss units to the installation position;

(11) After the truss units are temporarily fixed, they are docked and assembled to form a complete corridor truss;

(12) The steps of aligning the corridor truss with the embedded bolts, installing and fixing them.

The design principle of the present invention is: according to the installation principle of the sliding method in the grid installation method, combined with the actual design of the sliding cable structure, traction mechanism and safety system in the sliding system. The main load-bearing member of the suspension cable structure is the tensioned suspension cable. During the sliding process, the self-weight and horizontal traction force of the corridor truss are mainly borne by the suspension cable and the sliding frame; among them, the suspension cable mainly bears the self-weight of the truss, and the temporary support The mast primarily resists horizontal traction. For this reason, the present invention increases the rigidity of the sliding frame by reducing the sag of the suspension cables, thereby improving the tension of the steel cables and the stability of the sliding frame. The traction mechanism is mainly composed of a winch, the power direction is changed through the fixed pulley, and the traction truss slides into place. Since the corridor truss adopts non-standard design, its span and weight are not equal. There are many uncertain factors of risk in the sliding installation process. The control of the safety system adopts on-site measurement and actual measurement to monitor the deformation during the sliding installation process, and compare and analyze the deformation data and empirical data in real time to effectively ensure the index system, The deformation of the temporary support mast is controlled within the range to ensure construction safety.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The present invention is aimed at the characteristics of the steel truss in the corridor of the mountainous area conveying system. It utilizes the existing conveying corridor platform to complete the manufacture, and adopts the technical measures of "truss production and installation step by step" to quickly install the steel truss technology, which can reduce the construction area. Save on transportation costs.

(2) The present invention scientifically and rationally divides the construction sections in view of the complex terrain in mountainous areas, transportation materials, component road conditions, and construction period progress, and organizes construction in sections at the same time, thereby effectively shortening the construction period.

(3) The present invention adopts high-altitude fabrication and assembly and high-altitude sliding hoisting construction technology, which reduces the technical difficulty of corridor truss fabrication, assembly, and hoisting construction, and solves the extremely difficult problem that hoisting methods such as cranes and climbing poles cannot be used in steep mountainous areas. The technical quality of corridor truss production, assembly and hoisting ensures construction safety and precision, greatly reduces construction cost and shortens construction period.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic cross-sectional view of the present invention.

The names of the corresponding reference signs in the accompanying drawings are as follows:

1-column, 2-beam, 3-through hole, 4-rib plate, 5-bracket, 6-slip line, 7-hoist, 8-fixed pulley, 9-supporting column, 10-cable wind rope, 11-inversion Chain Hoist, 12-Gallery Truss.

detailed description

The present invention will be further described below with reference to the accompanying drawings and examples, and the embodiments of the present invention include but not limited to the following examples.

Example

As shown in Figures 1 and 2, this embodiment provides a high-altitude sliding hoisting device for a mountain corridor truss, which is used to solve the problem that hoisting methods such as cranes and climbing poles cannot be used in steep mountainous areas. The hoisting device mainly includes a bracket, a sliding frame, a sliding cable and a traction mechanism. The support is a four-column support column, which is arranged at both ends of the installation platform.

The sliding frame is composed of upright columns, and its structure is a rectangular parallelepiped frame or a cube frame. In this embodiment, the sliding frame is made of Φ219 steel pipes to make six upright columns each 2 meters long. Specifically, on both sides of the top of the continuous three-span concrete support Two columns are anchored each, the distance between the columns is greater than the width of the two chords of the corridor truss, and the top of the columns is welded with a beam. There is a through hole for the slide cable to pass through. When installing, the slide cable passes through the ribs at the top of both ends of the sliding frame, and the two ends of the slide cable are anchored to the adjacent four-column support columns at both ends along the sliding direction. Fix one end of the zipline before fixing it, and use an inverted chain hoist to tension the zipline at the other end. After the zipline is tensioned, use 4 sets of buckles to fix the zipline firmly. When the end bracket is a single bracket with a higher height, The anchorage angle of slide cable should be no more than 60 degrees, and support 5 needs to do effective pull anchor with cable wind rope, prevents that overturning accident takes place in the back end support of suspension cable stress.

The traction mechanism in this embodiment includes two parts: hoist and fixed pulley. During the sliding process of the road truss, there will be no large deviation, resulting in problems such as stop slipping and hooking, which will increase the quality and safety risks.

The installation of the traction mechanism is as follows: install and fix a winch on the rear four-column support of the gallery truss as the traction force for the sliding of the gallery truss; fix a certain pulley on the front four-column support with a wire rope, and the traction rope of the hoist and the gallery When connecting the trusses, first fix the 4.5m-long slings to the ends of the lower chords on both sides of the corridor trusses with buckles, and then connect the traction cables to the middle of the fixed slings. When the corridor trusses are pulled and stressed, the two The strings will be stressed at the same time, preventing the truss frame from being deformed in tension.

A moving pulley is installed on the sliding cable, and the corridor truss is connected with the sliding cable through the moving pulley. During construction, after the corridor truss is assembled on the installation platform, the corridor truss is connected with the moving pulley installed on the sliding cable with an upside-down chain hoist. For the chain hoist, slowly suspend the whole corridor truss about 50mm in the air, check whether there is any deformation or looseness of the zipline system bracket, zipline, upside-down chain hoist, movable pulley, etc. Check again whether there is any deformation or looseness of the sliding cable system bracket, sliding cable, chain hoist, pulley and other components. After confirming that all components of the zipline system are working normally, manually cooperate with the winch to continue the continuous sliding operation of the truss. During the sliding process, when the deflection arc is too large under the force of the zipline, use the inverted chain hoist to lift the truss to adjust the height of the truss , until the traction slides to the installation position of the steel truss.

The safety facilities in this embodiment mainly include railing posts, safety ropes and cable wind ropes, which are installed as follows: in the process of making, sliding and installing, they are all high-altitude operations, and the safety risk is very large. According to the construction conditions of each operation section, Take targeted security measures. When the platform is made, it is restricted by the width of the platform and it is convenient for the movement and turning of the truss members. Flexible protection is used, that is, the railing columns are welded and fixed every 3m on the platform, and they are tied to the railing columns with thick hemp ropes to form flexible protective railings; Before construction, for a single support with a high height, use 2 cable wind ropes to anchor the support to prevent the single support from overturning due to lateral force; rope on which the skid steer operator hangs the safety belt.

In this embodiment, the construction is organized in sections at the same time, and the single-piece truss is tested for lifting and sliding in the same way as the bottom-bearing truss. After the inspection is correct, the sectioned single-piece truss is slid into place. According to the position of the center line of the truss on the bracket and the sliding frame, adjust the position of each single-piece truss. After the adjustment is in place, temporarily fix the truss at both ends. The four-segment single-piece steel trusses are slid into place in sequence from far to near, temporarily fixed and single-piece butt jointed, and then the upper and lower chord supports are installed from the middle to both ends.

Installation and fixation and platform slab paving: After the truss slides to the support position, slowly loosen the chain hoist at a distance of 100mm from the column datum level, and manually pry the corridor truss so that the bolt holes of the corridor truss support are aligned with the pre-embedded column top Bolt, the inverted chain hoist slowly lowers the hook into place. The pillars are tightened with inclined irons (wedges) around the columns, and the corridor trusses are corrected so that the horizontal displacement and verticality deviation are within the allowable range of the specification and design, then welded and fixed, and then unhooked. After this work is completed, the subsequent steel platform pavement construction can be carried out.

According to the above-mentioned embodiments, the present invention can be well realized. It is worth noting that, based on the premise of the above-mentioned design principle, in order to solve the same technical problem, even if some insubstantial changes or modifications are made on the basis of the structure disclosed in the present invention, the essence of the adopted technical solution is still Like the present invention, it should also be within the protection scope of the present invention.

Claims (8)

1. A high-altitude sliding hoisting device for a mountain corridor truss, characterized in that it includes brackets (5) installed at both ends of the installation platform, a sliding frame set on the top of the installation platform and composed of columns (1), and the The sliding cable (6) used in conjunction with the sliding frame, and the traction mechanism; a crossbeam (2) is installed on the top of the two columns at the same end, and is set on the crossbeam (2) near its connection with the column There is a rib plate (4) with a through hole (3), the slide cable (6) passes through the rib plate (4) at the top of both ends of the sliding frame and the two ends are anchored on the bracket (5) , the corridor truss is located in the sliding frame and is pulled by the traction mechanism, and moves on the sliding cable (6) through the movable pulley installed on the sliding cable (6); on the sliding frame Safety ropes for connecting construction personnel are also provided; the corridor truss is connected to the movable pulley through an inverted chain hoist (11). 2. A high-altitude sliding hoisting device for mountain corridor trusses according to claim 1, characterized in that the traction mechanism includes a winch (7) set on one of the supports (5), and a hoist (7) set on the other The fixed pulley (8) on the bracket (5), the traction cable of the hoist (7) is connected to the corridor truss after bypassing the fixed pulley (8). 3. The high-altitude sliding hoisting device for trusses in corridors in mountainous areas according to claim 2, characterized in that the fixed pulley (8) is set in the center so that the traction cables of the hoist are aligned with the centerline of the corridor trusses unanimous. 4. The high-altitude sliding hoisting device for a mountain corridor truss according to claim 3, characterized in that slings are arranged at the ends of the lower chords on both sides of the corridor truss, and the traction rope of the hoist passes through the Said sling pulls the gallery truss to move. 5. The high-altitude sliding hoisting device for mountain corridor trusses according to any one of claims 1 to 4, characterized in that, a number of support columns (9) are also arranged at the lower part of the installation platform. 6. The high-altitude sliding hoisting device for truss trusses in corridors in mountainous areas according to claim 5, characterized in that, the support columns (9) are anchored by cable wind ropes (10). 7. The high-altitude sliding hoisting device for truss trusses in corridors in mountainous areas according to claim 1, characterized in that a railing post is arranged every three meters on the upper part of the installation platform. 8. The implementation method of a mountain corridor truss high-altitude sliding hoisting device according to any one of claims 1-7, characterized in that it comprises the following steps: (1) The steps of building brackets at both ends of the installation platform; (2) The steps of building a sliding frame through columns on the top of the installation platform; (3) Weld the rib plate on the top of the sliding frame, pass the slide cable through the rib plate and pull the anchors at both ends along the sliding direction to fix it on the bracket; (4) The steps of installing the traction mechanism on the bracket; (5) Steps for assembling corridor trusses on the installation platform; (6) Segment the corridor truss into several truss units; (7) The step of connecting the truss unit with the movable pulley on the cable by using an inverted chain hoist; (8) The steps of connecting the traction mechanism to the truss unit; (9) Manually cooperate with the traction mechanism to continuously slide the truss unit until the truss unit slides to the installation position; (10) Repeat steps (7)~(9) to slide all truss units to the installation position; (11) After the truss units are temporarily fixed, they are docked and assembled to form a complete corridor truss; (12) Steps for aligning the corridor truss with the embedded bolts, and installing and fixing them.