How did the tower crane at the construction site be removed from such a high place?

The tower crane consists of a standard section of sections. Only the upper part of the section is relatively fixed. To be raised, a standard section is installed inside.

Then use the hydraulic device on the tower crane to lift the relatively fixed fuselage to the specified position, and clamp it with the connector (of course, the connection must be removed when lifting). Add the standard section, and then lift and fix. Of course, it must be fixed before it can be used.

And so it gradually rises. Demolition is the reverse process of this.

In fact, the installation and dismantling are completed by itself, you carefully observe the section below the tower crane control room, you will find that it is just a set, set on the steel structure below.

When it is actually necessary to rise, first the sleeve is raised, and then a section is added in the middle, and the sleeve is ascending one section. So slowly, the tower crane went up, and it was the opposite when it was dismantled.

The installation of the sleeve is generally done close to the ground and is done by the crane.

Generally, the tower crane is installed after pouring the foundation and then reaching a certain strength. Installation sequence: tower derrick (reinforcing section, standard section) - tower cap --- tower back wall - installation of half counterweight - tower front wall --- installation of remaining counterweight --- through wire rope --- lifting and commissioning.

The whole hoisting process needs to be completed with the cooperation of the lifting truck crane.

If the crane tower of the construction site is to be removed, let the workers go up to dismantle, and then the machine assists below, so that the things that are removed can be removed smoothly, and the auxiliary of the crane increases the progress.

Some small tower cranes are similar to the structure of the replacement type, which can be lowered by themselves one by one. In addition, there are some relatively high tower cranes, it is necessary to install a small tower crane on the top of the building, and then use this small tower crane to dismantle the large tower crane.

When the tower crane is installed, it is installed section by section, and it is the same when it is dismantled, but it is dismantled from top to bottom.

Although the tower crane on the construction site is operated at a very high place, it is divided into pieces and dismantled by part by part when dismantling. It's not particularly complicated.

"Tower crane" "i.e. tower crane".

It will be installed at the beginning of construction, and it will be hoisted by a general mobile crane and combined one by one. Inside the tower, there is a hydraulic jack for future climbing. When the building is built layer by layer, and the height is about to touch the tower crane, it is time to climb the work.

At this time, the tower crane engineer will loosen the screws that fix the tower crane, operate the jack, raise the tower crane about one meter, and then fix the tower column on the structure of the building, then retract the jack and fix the bottom on the building structure, and then loosen the upper screw, support the jack, and then rise one meter, just like that, repeatedly operate, stretch and contract, to the required height, and then the tower column is indeed fixed.

When the tower crane is to be removed when the building is completed, a small crane will be lifted to the roof with the tower crane first, and then the tower crane will be lowered to the roof with the shrinkage of the jack, and then decomposed into several sections, lifted down with a small crane, and then the small crane will be decomposed into smaller components and taken down by elevator. After the tower crane is dismantled, it is necessary to make up the original structure of the tower crane.

There is another way to stretch the tower column with its own jack, and then use its own boom to lift a section of the column body and put it in, and then retract the jack, and in this way, the column body becomes longer.

Disassembly sequence: the tower crane descends to the roof height, the balance weight is left from the tail of the balance arm to the third position, 1 counterweight, balance weight, balance arm, tower top, cab, slewing mechanism, sleeve and standard section.

1. According to the tower crane operation procedure, the tower is lowered to the initial installation height, and the wire rope of the luffing and lifting mechanism is dismantled.

2. Use the truck crane to dismantle the tower crane, remove the counterweight first, and only retain the counterweight from the tail of the arm to the position of the tower.

3. Removal of the boom: the truck crane lifts the boom slightly, and the wire rope with the lifting mechanism bypasses the pulley group on the top of the tower and the boom lever to dismantle the boom lever, and then disassembles the pin shaft at the root of the boom, and then the truck lifts the boom to the ground.

4. After removing the remaining counterweight, the truck crane slightly lifts the balance arm to remove the tie rod, and then dismantles the pin shaft of the root when it reaches the horizontal position of the balance arm, and lifts the balance arm to the ground.

5. Removal of the tower cap.

6. Dismantle the cab and slewing mechanism assembly. Before removing the turntable and the sleeve pin and bolt, the sleeve is fixed.

7. Remove the sleeve frame and standard section.

1. Install the base section and hoist the standard section. The base section of the tower body (8570kg) is installed on the foundation, and the standard section (1 section) that is pre-assembled is hoisted and installed on the base section that has been installed, and is connected with the pin shaft of 8 60 (60 208 285).

2. Install the climbing sleeve. Lift the climbing frame (16760kg in total) on the already installed tower body, and adjust the gap between the climbing frame and the standard section (2-3mm).

3. Install the slewing tower and the driver's cab. Lifting the slewing tower body (1900kg), pay attention to the direction of the ear plate used for installing the balance arm ladder during installation, and make the side of the welded ear plate face the side of the installation of the balance arm jujube transport; Use 4 110 (110-275 370) pins to fasten the slewing tower body and the upper and lower supports.

4. Install the balance arm. Assemble the balance arm on the ground, install the walkway, electric control cabinet and railing, lift the balance arm (12640kg in total), and connect the balance arm Zhaoyan Town with 2 pieces of 110 (110-275 370) pin shaft and the slewing tower body, and open the cotter pin.

5, install a frame assembly has been installed ladder and platform a frame assembly (9250kg) lifted, first the tower top front chord with 4 110 pin shaft and balance arm connection.

6. Pre-install 4 pieces of 5 tons of counterweight (near the tower body).

7. Assemble the hoisting boom 45 meters on the ground, try to lift the balance arm, adjust the lifting point to make it balanced, and tie a guide rope at its root in advance.

8. Wear and wrap the hoisting wire rope and the installation is completed.

This is the same as building a transmission tower, a section is connected with bolts and nuts, installed on it, and removed and returned.

There are several ways to connect the tower crane to the height:

The upper jacking and joint connection height is to raise the upper part of the tower body above the top of the tower body to a height with the help of the sleeve frame, so as to form a space, and the standard section of the tower body is introduced from the side and connected with the lower tower body. Or insert this space from top to bottom and connect with the lower tower. There are two ways to add joint height in jacking:

One is to use the sleeve frame to jack and connect the height; The other is to adopt the assembled outer tower body structure, first from the top of the outer tower body to assemble the height, and then by the lower part of the inner tower body structure upwards, so that the tower body structure increases a certain height.

Do you know how the tower crane on the construction site is raised?

The tower crane at the construction site is first installed by the installation team and the steam crane, and then it is relied on the built-in hydraulic system on the tower crane to lift the joint.

First, the tower crane was lowered with the hydraulic device of the tower crane itself, and then the tower crane was disassembled with a truck crane.

Tower crane industry group, see my name for the group number.

After the tower crane of the super high-rise building is dismantled on the roof, the roof crane is installed to transport it down, and the roof crane is removed with a lifting rod or a small lifting machinery, and the rest is unloaded with a construction lift, and the demolition work of the tower crane is completed.

Tower crane, referred to as internal climbing crane, is a tower crane installed in the elevator shaft or stairwell inside the building, which can gradually climb up with the construction process. In addition to the special internal climbing tower crane, the general self-elevating tower crane can also be used as an internal climbing tower by replacing the climbing system and transforming and adding some accessories.

How is a tower crane installed on a construction site? Deceptively simple but intricate!

The tower crane installation is divided into two types: independent height and attachment height: 1Independent height installation mainly uses truck cranes, after installing and fastening from the bottom beam, install the foundation section, support section and standard section in turn, and then install the rotating part of the jacket frame, then install the tower cap, the rear arm, and finally install the crane arm, and finally install the remaining counterweight, after the above-mentioned installation is in place (the installation of the steam crane is completed), it is the jacking plus section to the independent height requirement.

2.The installation of the attachment height is the same as the work after the installation of the above-mentioned steam crane, the only additional work is that the anchor attachment device needs to be installed first, and then jacked section by section through the jacking system of the tower crane itself, until the required height!

3.The dismantling of the tower is in reverse order of installation, and it cannot be dismantled by one wrong step!

The foundation section or the bottom section is hoisted into the foundation, the level is measured, the direction is determined, and then look at the scene, whether one or two reinforcing joints need to be added to the bottom section, and then installed, if not, the upper sleeve is installed and then the guardrail is installed on the sleeve and then the guardrail is hoisted into the jacking cylinder, and then the upper guardrail is installed and hoisted into the cable, and the cab is installed on the slewing.

Then go up and rotate and insert eight screws, wear nuts and tighten them, lay the slewing pin, and then go up to the tower cap and drive the pin from low to high, and then connect the assembled rear arm to the slewing and tower cap, hang a piece of counterweight and put it into the back arm, fight the forearm in turn, and lay the tie rod, find the center point, lift and slew and tower cap connection, and then lift the remaining counterweight into the rear arm, finish, Ah Q