Construction method for upright installation and alternate pushing in-position of ultrahigh inclined lattice tower

Abstract

The invention discloses a construction method for vertically mounting and alternately pushing an ultrahigh inclined lattice tower in place. The construction method comprises the following steps: firstly, completing integral assembly of the lattice tower and mounting of a top pushing support frame on the ground; then the tower is vertically installed, and a hinged support and a temporary support are arranged at the bottom of the tower; a plurality of hydraulic pushing devices are installed on the main structure, and the tower is stably rotated to a designed inclined state from a vertical state through the alternate pushing effect of the hydraulic pushing devices; and finally, the supplementary rod is installed, the temporary device is dismantled, and final fixing with the main structure is completed. The high-altitude operation risk is effectively avoided, the temporary supporting cost is saved, accurate in-place of the ultrahigh inclined tower is achieved through hydraulic synchronous control, and remarkable safety and economic benefits are achieved. The invention discloses a construction method for vertically mounting and alternately pushing an ultrahigh inclined lattice tower in place. The construction method comprises the following steps: firstly, completing integral assembly of the lattice tower and mounting of a top pushing support frame on the ground; then the tower is vertically installed, and a hinged support and a temporary support are arranged at the bottom of the tower; a plurality of hydraulic pushing devices are installed on the main structure, and the tower is stably rotated to a designed inclined state from a vertical state through the alternate pushing effect of the hydraulic pushing devices; and finally, the supplementary rod is installed, the temporary device is dismantled, and final fixing with the main structure is completed. The high-altitude operation risk is effectively avoided, the temporary supporting cost is saved, accurate in-place of the ultrahigh inclined tower is achieved through hydraulic synchronous control, and remarkable safety and economic benefits are achieved.

Description

Technical Field

[0001] This invention relates to the field of steel structure construction technology, and more specifically to a construction method for the alternating jacking and positioning of an ultra-high inclined lattice tower. Background Technology

[0002] Currently, in the field of steel structure construction in China, a mature, reliable, and efficient technical system has not yet been established for the installation of ultra-high, large-angle inclined lattice towers. The core technical bottlenecks in this field are reflected in two main aspects: firstly, the safety control during construction is extremely difficult; secondly, the accuracy of the final installation configuration is difficult to guarantee.

[0003] Traditional construction methods mainly suffer from the following technical limitations: Firstly, while using vertical jigs for the installation of individual components at height avoids the difficulties of overall hoisting, it requires a significant investment in temporary support structures and high-altitude work platforms. This not only results in extremely high costs but also poses significant safety risks due to the inherent instability of the ultra-high jig system itself.

[0004] Secondly, while using inclined support frames can match the tower's design angle, it places extremely stringent requirements on the spatial layout of the construction site. This method necessitates an additional, complex, and massive support system, which consumes a large amount of steel and occupies a large area, significantly increasing construction costs and making it extremely unsuitable for projects with limited space.

[0005] Secondly, if the method of manual adjustment and fixation using guy ropes and hand-operated hoists is adopted, that is, after the tower is initially positioned, the guy ropes are tightened in the opposite direction of the inclination, and then fine-tuning is done manually, this method not only requires a large construction site, which is almost impossible to implement in densely populated urban areas, but also its inclination control depends entirely on the experience of the workers, making it difficult to guarantee accuracy, prone to cumulative errors, and resulting in significant quality uncertainty.

[0006] In summary, existing traditional methods have significant drawbacks in terms of economic efficiency (high costs), construction efficiency (complex procedures and long cycles), and project quality (poor precision control). Therefore, there is an urgent need to develop a new, safe, precise, efficient, and cost-controllable installation process to overcome existing technological bottlenecks and meet the construction needs of modern large-scale and complex steel structure projects. Summary of the Invention

[0007] This invention provides a construction method for the vertical installation of ultra-high inclined lattice towers using alternating jacking. This method can effectively avoid the risks of high-altitude assembly, save on temporary support costs, and achieve high-precision installation.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a construction method for the vertical installation and alternating jacking of an ultra-high inclined lattice tower, comprising the following steps: Step 1: Complete the ground assembly of the lattice tower and install the jacking support frame on the top of the lattice tower; Step 2: Install the lattice tower upright, with a hinged support on one side of the bottom of the tower and a temporary support on the other side; Step 3: Install the jacking device on the main structure. One end of the jacking device is hinged to the jacking support frame, and the other end is slidably connected to the main structure. Step 4: By alternately pushing with multiple jacking devices, rotate the lattice tower from an upright state to the designed tilted state; Step 5: Install the supplementary rods at the bottom of the lattice tower and remove the hinged supports; Step Six: Connect and fix the lattice tower to the main structure, remove the jacking device, and complete the inclined installation of the lattice tower.

[0009] Furthermore, the jacking support frame includes diagonal braces, a first horizontal bar parallel to the lattice tower, and a second horizontal bar perpendicular to the lattice tower. One end of the diagonal brace is connected to the top of the lattice tower, and the other end is connected to a node of the first and second horizontal bars. The jacking device is hinged to the first horizontal bar. The jacking support frame includes at least two diagonal braces, at least one first horizontal bar, and at least one second horizontal bar. One end of the diagonal brace is connected to the top of the lattice tower, and the other end is connected to a node of the first and second horizontal bars. The axis of the first horizontal bar is parallel to the tower body direction of the lattice tower, and the hydraulic jacking device is hinged to the first horizontal bar.

[0010] Furthermore, the jacking device comprises two sets: hydraulic jacking device one and hydraulic jacking device two. The lattice tower is installed in place by alternating jacking by these two devices. During the jacking process, the two sets of jacking devices operate alternately; while one set jacks and provides forward power, the other set retracts and prepares for the next jacking stroke. The hydraulic jacking device is a computer-controlled synchronous hydraulic jacking system, capable of real-time monitoring and control of the displacement and pressure at the jacking point, ensuring that the rotation process of the lattice tower is synchronous and stable.

[0011] Furthermore, the hinge support includes a universal adjustment mechanism, allowing a deflection of -5° to +5° during installation. The hinge support is either a universal hinge support or a ball joint support, capable of adaptively allowing a deflection of -5° to +5° at the bottom of the lattice tower during the jacking process.

[0012] Furthermore, before the inclined installation of the lattice tower in step six, guy ropes are symmetrically installed on both sides of the upright lattice tower. After the jacking device is installed and in operation, the guy ropes are removed.

[0013] In summary, this invention involves installing a lattice-type tower upright, setting a hinged support at the bottom, and then using multiple hydraulic jacking devices to alternately push the top, causing the tower to rotate from an upright position to the designed tilted state. Compared with the prior art, this invention has the following beneficial effects: The method of this invention uses a method of first installing the inclined lattice tower vertically and then hydraulically pushing it into place, which avoids the high-altitude operation risks of traditional jig installation. The method of the present invention does not require the erection of temporary support frames, which can save on the cost of measures and reduce the consumption of turnover materials; (3) The method of the present invention uses hydraulic synchronous control to eliminate accumulated errors, which can achieve precise positioning of the design state. Attached Figure Description

[0014] Figure 1 This is a front view of the installation process of the construction method of the present invention; Figure 2 This is a top view of the installation process of the construction method of the present invention; Figure 3 This is a schematic diagram of the tower erection stage of the construction method of the present invention; Figure 4 This is a schematic diagram of the initial state of the tower alternating installation in the construction method of the present invention; Figure 5 This is a schematic diagram showing the completed state of the tower alternating installation in the construction method of the present invention; Figure 6 This is a schematic diagram showing the completed unloading state of the tower in this invention.

[0015] Attached diagram labels: 1. Lattice tower; 2. Temporary support frame; 3. Hinge support; 4. Jacking support frame; 41. Diagonal brace; 42. Horizontal bar one; 43. Horizontal bar two; 5. Main structure; 6. Hydraulic jacking device one; 7. Hydraulic jacking device two; 8. Sliding track; 9. Guy rope; 10. Supplementary pole. Detailed Implementation

[0016] The following is in conjunction with the appendix Figures 1 to 6 The specific implementation method of the construction method of alternating jacking and positioning of an ultra-high inclined lattice tower frame according to the present invention will be further described in detail.

[0017] A construction method for vertically installing an ultra-high inclined lattice tower with alternating jacking and pushing, comprising the following steps: Step 1: Complete the ground assembly of the lattice tower 1, and install the jacking support frame 4 on the top of the lattice tower 1; Step 2: Install the lattice tower 1 vertically, install the hinge support 3 on one side of the bottom of the tower, and install the temporary support 2 on the other side; Step 3: Install a hydraulic jacking device on the main structure 5. One end of the hydraulic jacking device is hinged to the jacking support frame 4, and the other end is installed on the sliding track 8 set on the main structure. Step 4: Rotate the lattice tower 1 from an upright position to the designed tilt position using a hydraulic jacking device; Step 5: Install the supplementary rod 10 at the bottom of the lattice tower 1 and remove the hinge support 3; Step 6: Connect and fix the lattice tower 1 to the main structure 5, remove the hydraulic jacking device, and complete the inclined installation of the lattice tower 1.

[0018] In this preferred embodiment, the lattice tower 1 has a height of not less than 90m and is designed to be tilted at a 70° angle to the ground, with its top connected to the main structure. During ground assembly of the lattice tower 1, the jacking support frame 4 is formed by welding together two diagonal rods 41, one horizontal rod 42, and two horizontal rods 43, and is installed on the top of the lattice tower 1. The hydraulic jacking device is hinged to one of the horizontal rods 42.

[0019] In this preferred embodiment, the hinged support 3 is pre-embedded in the ground and can be adjusted in all directions, allowing the lattice tower 1 to deflect by -5° to +5° during installation.

[0020] In this preferred embodiment, the jacking device includes two sets of hydraulic jacking devices. The lattice tower 1 is installed by alternating jacking of hydraulic jacking device 5 and hydraulic jacking device 6. One end of the hydraulic jacking device is connected to the inclined lattice tower 1 via a hinged joint through an ear plate. A sliding rail is provided at the top of the main structure. The other end of the hydraulic jacking device is connected to the sliding rail 8 via a wedge-shaped clamp. The device is driven to crawl by a hydraulic cylinder. When the hydraulic cylinder extends and the jacking device is working, it automatically jacks the stop block on the side of the slide rail to prevent relative sliding during the sliding process.

[0021] In this preferred embodiment, before the inclined installation of the lattice tower 1, guy ropes 9 are installed on both sides of the lattice tower 1. After the top hydraulic jacking device 1 5 and hydraulic jacking device 2 6 are installed and fixed, the guy ropes 9 are removed.

[0022] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A construction method for the vertical installation and alternating jacking of an ultra-high inclined lattice tower, characterized in that, Includes the following steps: Step 1: Complete the ground assembly of the lattice tower and install the jacking support frame on the top of the lattice tower; Step 2: Install the lattice tower upright, with a hinged support on one side of the bottom of the tower and a temporary support on the other side; Step 3: Install the jacking device on the main structure. One end of the jacking device is hinged to the jacking support frame, and the other end is slidably connected to the main structure. Step 4: By alternately pushing with multiple jacking devices, rotate the lattice tower from an upright state to the designed tilted state; Step 5: Install the supplementary rods at the bottom of the lattice tower and remove the hinged supports; Step Six: Connect and fix the lattice tower to the main structure, remove the jacking device, and complete the inclined installation of the lattice tower.

2. The construction method for vertical installation and alternating jacking of ultra-high inclined lattice towers according to claim 1, characterized in that: The jacking support frame includes an inclined rod, a horizontal rod one parallel to the lattice tower, and a horizontal rod two perpendicular to the lattice tower. One end of the inclined rod is connected to the top of the lattice tower, and the other end is connected to the node of the horizontal rod one and the horizontal rod two. The jacking device is hinged to the horizontal rod one.

3. The construction method for vertical installation and alternating jacking of ultra-high inclined lattice towers according to claim 1, characterized in that: The number of jacking devices is two sets, including hydraulic jacking device one and hydraulic jacking device two. The lattice tower is installed in place by alternating jacking of the two.

4. The construction method for vertical installation and alternating jacking of ultra-high inclined lattice towers according to claim 1, characterized in that: The hinge support includes a universal adjustment mechanism that allows for a deflection of -5° to +5° during installation.

5. The construction method for vertical installation and alternating jacking of ultra-high inclined lattice towers according to claim 1, characterized in that: Before the inclined installation of the lattice tower in step six, guy ropes are symmetrically installed on both sides of the upright lattice tower. After the jacking device is installed and in operation, the guy ropes are removed.

Images