CN110424784B - Tower crane construction method of steel structure indirect cooling tower - Google Patents
Tower crane construction method of steel structure indirect cooling tower Download PDFInfo
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- CN110424784B CN110424784B CN201910724347.3A CN201910724347A CN110424784B CN 110424784 B CN110424784 B CN 110424784B CN 201910724347 A CN201910724347 A CN 201910724347A CN 110424784 B CN110424784 B CN 110424784B
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- tower
- indirect cooling
- cooling tower
- fixed
- cranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/10—Buildings forming part of cooling plants
- E04H5/12—Cooling towers
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Jib Cranes (AREA)
Abstract
The invention provides a tower crane construction method of a steel structure indirect cooling tower, and belongs to the technical field of civil construction. The method comprises the following steps: arranging m fixed tower cranes for covering a hoisting area of a conical section of the indirect cooling tower in the indirect cooling tower; after the conical section of the indirect cooling tower is built, arranging n fixed tower cranes for covering a hoisting area of a straight cylinder section of the indirect cooling tower in the indirect cooling tower by using the m fixed tower cranes, wherein m and n are integers more than or equal to 2; connecting n fixed tower cranes and reinforcing rings of straight cylinder sections of the indirect cooling tower by using a plurality of wall attaching rods, wherein each wall attaching rod is connected to different positions of each reinforcing ring; the wall-attached rod is connected with the reinforcing ring and the n fixed tower cranes through a hinged connection structure; the structure of the wall-attached rod is a spatial lattice structure; judging whether the acting force of each wall-attached rod on the indirect cooling tower is greater than a preset threshold value or not; if yes, an upper support rod and a lower support rod are arranged. By adopting the method, the construction efficiency of the indirect cooling tower and the safety of the fixed tower crane and the indirect cooling tower can be improved.
Description
Technical Field
The invention relates to the technical field of civil construction, in particular to a tower crane construction method of a steel structure indirect cooling tower.
Background
The existing indirect cooling tower is generally a steel structure indirect cooling tower, the steel structure indirect cooling tower generally comprises a main body structure formed by a conical section, a straight cylinder section and the like, and the conical section is positioned at the lower part of the straight cylinder section. Wherein the height of the cone section is about 50 meters, and the diameter is larger; the height of the straight cylinder section reaches about 170 meters, the diameter of the straight cylinder section is smaller than that of the conical section, and the diameter of the straight cylinder section is about 100 meters.
The construction method of the tower crane of the steel structure indirect cooling tower commonly used at present comprises the following steps: firstly, a crawler crane is adopted to build a conical section of the indirect cooling tower, and then a fixed tower crane is adopted to build a straight cylinder section of the indirect cooling tower.
However, the crawler crane has low efficiency and high endurance requirement on a walking road, and the construction and disassembly costs are high, so that the engineering cost is high.
Disclosure of Invention
The invention provides a tower crane construction method of a steel structure indirect cooling tower, which aims to improve the construction efficiency and safety of the indirect cooling tower.
In order to achieve the aim, the invention provides a tower crane construction method of a steel structure indirect cooling tower, which comprises the following steps:
arranging m fixed tower cranes for covering a hoisting area of a conical section of the indirect cooling tower in the indirect cooling tower;
after the construction of the conical section of the indirect cooling tower is finished, arranging n fixed tower cranes for covering a hoisting area of a straight cylinder section of the indirect cooling tower in the indirect cooling tower by using the m fixed tower cranes, wherein m and n are integers more than or equal to 2;
connecting the n fixed tower cranes and the reinforcing rings of the straight cylinder sections of the indirect cooling tower by using a plurality of wall attaching rods, wherein one end part of each wall attaching rod is connected to different positions of the reinforcing rings; the wall-attached rod is connected with the reinforcing ring and the n fixed tower cranes through a hinged connection structure; the structure of the wall attaching rod is a spatial lattice structure;
judging whether the acting force of each wall-attached rod on the indirect cooling tower is greater than a preset threshold value or not;
if the action force is larger than the preset value, an upper support rod and a lower support rod are arranged at the end parts of the stiffening plates, corresponding to the wall-attached rods, connected with the reinforcing rings, so that the action force is dispersed.
Optionally, m is greater than or equal to n.
Optionally, m fixed tower cranes and n fixed tower cranes are along the circumference of the indirect cooling tower is evenly distributed in the indirect cooling tower.
Optionally, there are 2 or more than 2 tower crane models the same in m fixed tower cranes.
Optionally, utilize m fixed tower cranes are in n portion of arranging in the inside of indirect cooling tower is used for covering the fixed tower crane in the hoist and mount district of indirect cooling tower straight section of thick bamboo section, include:
removing the fixed tower cranes with overlapped coverage areas according to the lifting area of the straight cylinder section of the indirect cooling tower;
and rebuilding the fixed tower crane used for covering the hoisting area of the straight cylinder section of the indirect cooling tower by using the standard section of the dismantled fixed tower crane, and/or increasing the height of the undetached fixed tower crane.
Optionally, m-n-2.
Optionally, the one end of attaching the wall pole pass through the steel pipe with cross gusset plate on the beaded finish is connected, the other end pass through the round pin hinge otic placode with fixed tower crane is connected.
Optionally, the wall attaching rods are divided into 3 lines, and each line is provided with 3 wall attaching rods.
Optionally, the fixed tower crane is a movable arm type tower crane.
According to the tower crane construction method of the steel structure indirect cooling tower, the fixed tower cranes are adopted in the process of building the indirect cooling tower conical section and the indirect cooling tower straight cylinder section, and the standard section of the fixed tower crane used for building the indirect cooling tower conical section can be used for building the fixed tower crane of the indirect cooling tower straight cylinder section, so that the construction efficiency of the indirect cooling tower can be improved, the outgoing cost of the tower crane is reduced, and the engineering cost is reduced; in addition, the fixed tower crane and the indirect cooling tower are hinged by adopting the wall attaching rods in a space lattice mode, and the upper support rods and the lower support rods are arranged according to the acting force of the wall attaching rods on the indirect cooling tower, so that the safety of the fixed tower crane and the indirect cooling tower is improved.
Drawings
FIG. 1 is a schematic diagram of a tower crane arrangement of an intercooling tower cone section provided by the invention;
FIG. 2 is a schematic diagram of a tower crane arrangement of a straight cylinder section of an indirect cooling tower provided by the invention;
FIG. 3 is a schematic diagram of a tower crane arrangement of an intercooling tower cone section provided by the invention;
FIG. 4 is a schematic structural view of a tower crane wall-attached rod provided by the invention;
FIG. 5 is a schematic structural view of the connection between a tower crane wall-attached rod and a cross gusset plate connecting plate provided by the invention;
FIG. 6 is a schematic diagram of the arrangement of the wall-attached rod of the straight cylinder section of the indirect cooling tower provided by the invention;
FIG. 7 is a schematic view of an upper and lower brace arrangement provided by the present invention;
FIG. 8 is a flow chart of a tower crane construction method of the steel structure indirect cooling tower provided by the invention.
[ reference numerals are described below ]:
1-an intercooling tower conical section; 2-fixed tower crane; 3-fixed tower crane; 4-fixed tower crane; 5-straight section of indirect cooling tower; 6-fixed tower crane; 7-fixed tower crane; 10-fixed tower crane; 11-a fixed tower crane; 12-a fixed tower crane; 13-fixed tower crane; 14-standard section of wall-attached rod; 15-attaching a wall rod conversion section; 16-pin hinge lug plate; 17-a steel pipe; 18-a cross gusset plate; 19-stiffening plates inside the indirect cooling tower; 20-attaching wall rods; 21-a reinforcement ring; 22-upper stay bar; 23-a lower stay; 24-medial extension rod.
Detailed Description
In order to make the objects, advantages and features of the present invention clearer, the following provides a tower crane construction method of a steel structure indirect cooling tower, which is provided by the present invention, with reference to the accompanying drawings. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
The invention provides a tower crane construction method of a steel structure indirect cooling tower, which comprises the following steps as shown in figure 8:
s101: arranging m fixed tower cranes for covering a hoisting area of a conical section of the indirect cooling tower in the indirect cooling tower; wherein m is an integer greater than or equal to 2.
In the implementation, when a small part of area of the intercooling tower conical section 1 is not covered by the fixed tower crane, the hoisting can be completed by utilizing the assistance of a truck crane.
S102: after the conical section of the indirect cooling tower is built, arranging n fixed tower cranes for covering a hoisting area of a straight cylinder section of the indirect cooling tower in the indirect cooling tower by using m fixed tower cranes; wherein n is an integer greater than or equal to 2.
Optionally, m is greater than or equal to n. Alternatively, m is equal to 2, 3 or 4. For example, as shown in fig. 1 and 2, 3 fixed tower cranes may be used when constructing the intercooling tower cone section 1, and 2 fixed tower cranes may be used when constructing the intercooling tower straight section 5. Wherein the height of the indirect cooling tower conical section is about 50 meters, and the maximum diameter of the indirect cooling tower conical section 1 is about 150 meters; the height of the straight cylinder section 5 of the indirect cooling tower is about 170 meters, the diameter of the straight cylinder section 5 of the indirect cooling tower is smaller than that of the conical section 1 of the indirect cooling tower, and the diameter of the straight cylinder section 5 of the indirect cooling tower is about 100 meters. As shown in fig. 3, according to another specific solution provided in the embodiment of the present invention, 4 fixed tower cranes may be used when constructing the intercooling tower cone segment 1.
Alternatively, referring to fig. 2, m may be 2, so that the intercooling tower straight section 5 may be continuously built on the basis of 2 fixed tower cranes of the intercooling tower cone section 1 without removing the fixed tower cranes to move the position again.
S103: connecting n fixed tower cranes and reinforcing rings of straight cylinder sections of the indirect cooling tower by using a plurality of wall attaching rods, wherein one end part of each wall attaching rod is connected to different positions of each reinforcing ring; wherein, the wall-attached rod is connected with the reinforcing ring and the n fixed tower cranes through a hinged connection structure; the structure of the wall-attached rod is a space lattice structure.
The wall attaching rods have larger acting force on the indirect cooling tower and are generally and uniformly distributed at the reinforcing ring part of the indirect cooling tower. In order to meet the full coverage of the tower crane for hoisting the straight cylinder section 5 of the indirect cooling tower, the distance between the center of the general tower crane and the main structure of the indirect cooling tower is far, generally about 25 meters, and therefore the wall-attached rod is long. Because the wall attaching rod is longer and bears larger axial force, in order to reduce the second-order effect of the wall attaching rod caused by self weight, the wall attaching rod can adopt a space lattice structure, and the structure of the wall attaching rod is shown in figure 4. The structural size, the section specification of the member, the structure of the connecting node and the like of the wall attaching rod can be checked by combining the computer simulation construction analysis technology.
Every attaches the hookup location difference of wall pole and beaded finish, and specific hookup location can combine the atress condition of intercooling tower to confirm, can disperse fixed tower crane like this to the effort of intercooling tower, improves the security of intercooling tower and fixed tower crane.
In order to reduce the additional influence on the wall attaching rod caused by the uncooled settlement of the indirect cooling tower and the tower crane, the two ends of the wall attaching rod are preferably hinged. Optionally, the joint of the wall-attached rod and the tower crane is of a hinged structure, and the joint of the wall-attached rod and the indirect cooling tower is converted into a cross-shaped connecting structure. As shown in fig. 4, the wall-attached pole is composed of a wall-attached pole standard knot 14 and a wall-attached pole conversion knot 15, and a hinge lug plate 16 is provided at one end thereof, and a steel pipe 17 is provided at the other end thereof. As shown in fig. 5, the steel pipes 17 are connected with the cross gusset plates 18 by welding, wherein the cross gusset plates 18 are connected with the stiffening plates 19 inside the indirect cooling tower.
Optionally, referring to fig. 2 and 6, 3 wall-attached rods may be provided, and the number of each wall-attached rod is 3, so as to enhance the stability of the fixed tower crane. The 1-channel wall-attached rod refers to each wall-attached rod on the same layer of reinforcing ring.
S104: and judging whether the acting force of each wall-attached rod on the indirect cooling tower is greater than a preset threshold value. If so, arranging an upper stay bar and a lower stay bar at the end part of the stiffening plate which corresponds to the wall-attached rod and is connected with the reinforcing ring; if not, the upper support rod and the lower support rod are not needed.
In the implementation, the computer simulation construction analysis technology can be combined to judge whether the acting force of the wall-attached rod on the indirect cooling tower is greater than a preset threshold value; if so, an upper brace and a lower brace are provided at the end of the stiffener plate connected to the reinforcement ring to distribute the force. As shown in fig. 7, the tower crane wall attaching rod 20 is connected to the outer side of the reinforcing ring 21, and the upper stay 22 and the lower stay 23 are provided to the inner extension rod 24 of the reinforcing ring 21 to disperse the force of the tower crane wall attaching rod 20 on the indirect cooling tower.
S105: and arranging an upper stay bar and a lower stay bar at the end part of the stiffening plate which corresponds to the wall-attached rod and is connected with the reinforcing ring so as to disperse the acting force.
According to the tower crane construction method of the steel structure indirect cooling tower, the fixed tower cranes are adopted in the process of building the indirect cooling tower conical section 1 and the indirect cooling tower straight cylinder section 5, and the standard section of the fixed tower crane used for building the indirect cooling tower conical section 1 can be used for building the fixed tower crane of the indirect cooling tower straight cylinder section 5, so that the construction efficiency of the indirect cooling tower can be improved, the outgoing cost of the tower crane is reduced, and the engineering cost is reduced; in addition, the fixed tower crane and the indirect cooling tower are hinged by adopting the wall attaching rods in a space lattice mode, and the upper support rods and the lower support rods are arranged according to the acting force of the wall attaching rods on the indirect cooling tower, so that the safety of the fixed tower crane and the indirect cooling tower is improved.
The method provided by the invention can also be used for various buildings of cooling towers or similar intercooling tower structures.
Optionally, m fixed tower cranes and n fixed tower cranes are uniformly distributed in the indirect cooling tower along the circumference of the indirect cooling tower. As shown in fig. 1, the fixed tower cranes 2-4 are uniformly distributed inside the intercooling tower cone section 1 along the circumferential direction of the intercooling tower cone section 1; as shown in fig. 2, the fixed tower cranes 6-7 are uniformly distributed inside the indirect cooling tower straight-tube section 5 along the circumferential direction of the indirect cooling tower straight-tube section 5; as shown in FIG. 3, the fixed tower cranes 10-13 are uniformly distributed inside the intercooling tower section 1 along the circumferential direction of the intercooling tower section 1. By adopting an even distribution mode, the overlapping condition of the coverage areas between the tower cranes can be reduced, and the total coverage area of the tower crane is increased.
Optionally, there are 2 or more than 2 tower crane models the same in m fixed tower cranes. For example, the model of the fixed tower crane 10-13 in fig. 3 has 2 or more than 2 tower crane models the same, after the intercooling tower cone 1 is built, the fixed tower crane 11 and the fixed tower crane 13 can be detached, the standard knot of the detached tower crane can be used for the fixed tower crane 10 and the fixed tower crane 12, the fixed tower crane 10 and the fixed tower crane 12 can become the fixed tower crane 6 and the fixed tower crane 7 in fig. 2 after the standard knot of the tower crane is added, so that the access cost of the tower crane can be reduced.
The tower crane foundation generally needs to meet the requirement of about 150kPa on the bearing capacity of the foundation, when the lower lying foundation can not meet the requirement, the foundation is improved or a pile foundation is arranged, and the treatment range of the foundation is not less than the range of the tower crane foundation. The tower crane foundation is preferably a bearing platform type independent foundation, and the general bearing platform has a large size of about 8 meters multiplied by 1.8 meters so as to effectively ensure the anti-overturning performance of the tower crane during operation. The concrete forms of the tower crane foundation and the foundation are determined by calculation according to the model and the stress performance of the concrete tower crane.
The tower crane construction method of the steel structure indirect cooling tower provided by the invention can be used for determining the specific structures of the tower crane overlong wall-attached rod, indirect cooling tower reinforcing measures and the like by applying computer simulation analysis, so that the safety of the tower crane construction method of the indirect cooling tower is ensured.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the claims of the present invention.
Claims (8)
1. A tower crane construction method of a steel structure indirect cooling tower is characterized by comprising the following steps:
arranging m fixed tower cranes for covering a hoisting area of a conical section of the indirect cooling tower in the indirect cooling tower;
after the construction of the conical section of the indirect cooling tower is finished, arranging n fixed tower cranes for covering a hoisting area of a straight cylinder section of the indirect cooling tower in the indirect cooling tower by using the m fixed tower cranes, wherein m and n are integers more than or equal to 2;
connecting the n fixed tower cranes and the reinforcing rings of the straight cylinder sections of the indirect cooling tower by using a plurality of wall attaching rods, wherein one end part of each wall attaching rod is connected to different positions of the reinforcing rings; the wall-attached rod is connected with the reinforcing ring and the n fixed tower cranes through a hinged connection structure; the structure of the wall attaching rod is a spatial lattice structure; the wall attaching rods are divided into a plurality of channels, each channel is provided with a plurality of wall attaching rods, and each wall attaching rod is a wall attaching rod on the same layer of reinforcing ring; one end of the wall attaching rod is connected with the cross gusset plate on the reinforcing ring through a steel pipe;
judging whether the acting force of each wall-attached rod on the indirect cooling tower is greater than a preset threshold value or not;
if the action force is larger than the preset value, an upper support rod and a lower support rod are arranged at the end parts of the stiffening plates, corresponding to the wall-attached rods, connected with the reinforcing rings, so that the action force is dispersed.
2. The tower crane construction method of the steel structure indirect cooling tower according to claim 1, wherein m is greater than or equal to n.
3. The tower crane construction method of the steel structure indirect cooling tower according to claim 1 or 2, wherein the m fixed tower cranes and the n fixed tower cranes are uniformly distributed inside the indirect cooling tower along the circumferential direction of the indirect cooling tower.
4. The tower crane construction method of the steel structure indirect cooling tower according to claim 3, wherein 2 or more than 2 tower cranes in the m fixed tower cranes have the same model.
5. The tower crane construction method of the steel structure intercooling tower as claimed in claim 4, wherein the arranging n fixed tower cranes for covering the hoisting area of the intercooling tower straight section inside the intercooling tower by using the m fixed tower cranes comprises:
removing the fixed tower cranes with overlapped coverage areas according to the lifting area of the straight cylinder section of the indirect cooling tower;
and rebuilding the fixed tower crane used for covering the hoisting area of the straight cylinder section of the indirect cooling tower by using the standard section of the dismantled fixed tower crane, and/or increasing the height of the undetached fixed tower crane.
6. The tower crane construction method of the steel structure indirect cooling tower according to claim 1, wherein m = n = 2.
7. The tower crane construction method of the steel structure indirect cooling tower according to claim 1, wherein the wall attaching rods are divided into 3 lines, and each line is provided with 3 wall attaching rods.
8. The tower crane construction method of the steel structure indirect cooling tower of claim 1, wherein the fixed tower crane is a swing arm tower crane.
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| CN201910724347.3A CN110424784B (en) | 2019-08-07 | 2019-08-07 | Tower crane construction method of steel structure indirect cooling tower |
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| CN201910724347.3A CN110424784B (en) | 2019-08-07 | 2019-08-07 | Tower crane construction method of steel structure indirect cooling tower |
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| CN110424784B true CN110424784B (en) | 2021-02-23 |
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| CN113336108A (en) * | 2021-04-21 | 2021-09-03 | 中国化学工程第三建设有限公司 | Movable mast tool for dismantling high-altitude tower crane in cooling tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2119471C2 (en) * | 1971-04-21 | 1982-06-09 | Ipari Epülettervezö Vállalat, Budapest | Tower construction with a metal skeleton |
| CN103979437A (en) * | 2014-05-26 | 2014-08-13 | 上海市机械施工集团有限公司 | Tower crane wall attached member bar device |
| CN204980941U (en) * | 2015-06-19 | 2016-01-20 | 中天建设集团有限公司 | Tower crane that can make up different length attaches wall pole |
| CN106759883B (en) * | 2016-11-30 | 2019-05-24 | 上海市机械施工集团有限公司 | The tower crane construction method of large-scale steel structure air cooling tower |
| CN206529229U (en) * | 2017-02-27 | 2017-09-29 | 中建八局第三建设有限公司 | It is a kind of to increase the tower crane device of independence and freedom height |
| CN107826989B (en) * | 2017-11-07 | 2019-04-19 | 中国化学工程第三建设有限公司 | A kind of double tower for indirect cool tower installation hangs the installation method of adhering bar part |
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