Tank room dome construction method based on BIM

Abstract

The present invention relates to a tank room dome construction method based on BIM, comprising the following steps: a. earthwork construction, excavating earthwork according to the laying-out position; b. constructing the tank room foundation, and constructing the tower crane foundation at the center of the tank room foundation at the same time; c. installing the tower crane on the tower crane foundation; d. constructing the tank room concrete wall; e. using the tower crane to hoist the off-site steel tank bottom plate to the tank room foundation to construct the steel tank bottom plate; f. using the tower crane to construct the steel tank by the inverted installation method; g. backfilling the outer side of the tank room; h. using the top of the steel tank as a formwork platform to assemble the tire frame platform, and connecting the tire frame platform with the tower crane through a steel wire rope; i. lifting the tire frame platform to the designed height and fixing it; j. constructing the tank room dome on the tire frame platform; k. after the tank room dome reaches the strength, the tire frame platform is removed. The present invention shortens the construction period and reduces the construction cost.

Description

Technical Field

[0001] The invention relates to a dome construction method, in particular to a tank room dome construction method based on BIM. Background Art

[0002] The tank room of large-capacity earth-covered oil tanks is getting larger and larger, and the construction of the dome structure of the large-span reinforced concrete oil tank room has become a construction problem. The traditional reinforced concrete tank room construction process sequence is: tank room foundation construction--concrete tank wall construction---erection of full-floor scaffolding--support of formwork--binding steel bars--pouring concrete--maintenance---dismantling of formwork---construction of oil tanks inside the tank room. This construction method must be constructed in sequence, with many construction processes and long concrete maintenance time, resulting in a long construction period. In addition, the later steel structure oil tank construction is difficult to load and unload in a narrow space, and there are many safety hazards. The existing construction method requires the erection of a full-floor scaffolding, and the installation and removal of the scaffolding is large, and the construction cost is high. Summary of the invention

[0003] The purpose of the present invention is to provide a tank room dome construction method based on BIM to solve the problems of long construction period, high cost and many potential safety hazards of existing concrete tank room construction methods.

[0004] The present invention is implemented as follows: a tank room dome construction method based on BIM includes the following steps.

[0005] a. Earthwork construction: excavate the earth according to the layout position.

[0006] b. Carry out the construction of the tank room foundation and at the same time construct the tower crane foundation at the center of the tank room foundation.

[0007] c. Install the tower crane on the tower crane foundation.

[0008] d.Construction of the tank room concrete wall.

[0009] e. Use a tower crane to hoist the off-site steel tank bottom plate to the tank room foundation to carry out the construction of the steel tank bottom plate.

[0010] f. Use a tower crane to construct the steel tank using the inverted installation method.

[0011] g. Backfill the outside of the tank room.

[0012] h. Use the top of the steel tank as a formwork platform to assemble the tire frame platform, and connect the tire frame platform to the tower crane through steel wire ropes.

[0013] i. Lift the tire frame platform upwards to the designed height and secure it.

[0014] j. Construction of tank room dome is carried out on the tire frame platform.

[0015] k. After the tank room dome reaches sufficient strength, the tire frame platform is removed.

[0016] When the tank room concrete wall is constructed, a corbel for supporting the tire frame platform is arranged on the top of the concrete wall.

[0017] The tire frame platform includes a main beam and several ring beams. When splicing the tire frame platform in step h, the outermost ring beams are not spliced ​​first. In step i, after the tire frame platform is lifted up to the designed height, the outermost ring beams are spliced ​​and supported by the corbels.

[0018] In step j, after the tire frame platform is accepted, the back ribs and formwork are laid on the tire frame platform, and then the steel bars are tied. After the steel bars are accepted, concrete is poured and cured.

[0019] In step h, the two ring beams of the tire frame platform are connected to the standard section of the tower crane through wire ropes, and a hand winch is arranged on the wire ropes. In step i, the tire frame platform is lifted to the designed height by installing the standard section and adjusting the hand winch.

[0020] The concrete pouring of the tank room dome adopts a spiral rising method of pouring the lower part first and then the upper part.

[0021] Use BIM technology to design the tire frame platform and calculate the connection points between the tire frame platform and the wire rope.

[0022] The part of the steel tank top that is higher than the tank room top will not be constructed first. Square wood is placed on the steel tank top as pads for the tire frame platform. After the tank room dome construction is completed, the remaining part of the steel tank top and the top equipment will be constructed.

[0023] The present invention is a tank room dome construction method based on BIM, which adopts a tower crane plus a tire frame platform to change the original construction sequence of first constructing the dome of the reinforced concrete tank room and then constructing the steel tank. Adding a tower crane as a horizontal and vertical transportation equipment can reduce the working surface in the foundation pit, greatly reduce the amount of earthwork excavation and filling engineering, and thus shorten the construction period and reduce costs. First, the tank room concrete wall is constructed, and then the tower crane is used to construct the steel tank bottom plate and the steel tank. After the construction of the top of the steel tank is completed, the top of the steel tank is used as a formwork platform to make the tire frame platform, and the tire frame platform is lifted to the design height before the tank room dome is constructed on the tire frame platform. Since the steel tank is constructed first and then the tank room dome is constructed, and the tower crane can be used to quickly transport materials, the construction efficiency of the steel tank is greatly improved, thereby shortening the overall construction period. The present invention does not need to set up a full-house scaffolding, saving the erection and dismantling of the scaffolding, and the production, installation and dismantling of the steel frame platform are less, reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic diagram of the tank room dome construction of the present invention.

[0025] Figure 2 It is a structural diagram of a tire frame platform of the present invention.

[0026] In the figure: 1. Tank room foundation; 2. Tank room concrete wall; 3. Steel tank; 4. Bottom plate; 5. Tower crane; 6. Dome; 7. Structural hole; 8. Tire frame platform; 9. Wire rope; 10. Corbel; 8-1. Main beam; 8-2. Ring beam. DETAILED DESCRIPTION

[0027] The present invention is a tank room dome 6 construction method based on BIM, which specifically includes the following steps.

[0028] a. First, carry out earthwork construction and excavate the earth according to the layout position.

[0029] b. Carry out the construction of tank room foundation 1, and at the same time construct the foundation of tower crane 5 at the center of tank room foundation 1.

[0030] Specifically, it includes the construction of the ring beam of the tank room foundation 1, the construction of the tower crane 5 foundation, the construction of backfill sand in the foundation and the construction of asphalt sand.

[0031] c. After the tank room foundation 1 is constructed, the tower crane 5 is installed on the tower crane 5 foundation.

[0032] The height of the tower crane 5 is greater than a certain height of the tank room dome 6, so that it can operate safely, and the tower crane 5 can be used as a material transportation device during the construction of the steel tank 3 bottom plate 4, tank room, tire frame platform 8 and dome 6.

[0033] d. Construction of the tank room concrete wall 2.

[0034] The tank room concrete wall 2 is constructed using a tower crane 5, which is used to transport materials required for construction such as steel bars and formwork. When constructing the tank room concrete wall 2, a circle of brackets 10 is added to the inner side of the top of the concrete wall, and the brackets 10 are used to support the tire frame platform 8 in the later stage.

[0035] e. Use the tower crane 5 to hoist the off-site steel tank bottom plate 4 onto the tank room foundation 1 to carry out the construction of the steel tank bottom plate 4.

[0036] The foundation of the tower crane 5 and the surrounding steel tank bottom plate 4 will not be constructed for the time being, and will be constructed after the tower crane 5 is dismantled.

[0037] f. Use the tower crane 5 to construct the steel tank 3 using the inverted installation method.

[0038] Among them, the part of the top of the steel tank 3 that is higher than the top of the tank room is not constructed first. Square wood is placed on the top of the steel tank 3 as a pad for the tire frame platform 8. After the construction of the tank room dome 6 is completed, the remaining part of the top of the steel tank 3 and the top equipment are constructed.

[0039] g. After the construction of steel tank 3 is completed, the outer side of the tank room can be backfilled with earth.

[0040] h. Use the top of the steel tank 3 as a formwork platform to assemble the tire frame platform 8, and connect the tire frame platform 8 to the tower crane 5 through the wire rope 9.

[0041] Among them, the tire frame platform 8 includes a main beam 8-1 and a plurality of ring beams 8-2. The plurality of main beams 8-1 are radially distributed. The ring beams 8-2 connect the main beams 8-1 in sequence to form a tire frame platform 8 projected as a circle. At the same time, the main beams 8-1 are arc-shaped, and the formed tire frame is a dome 6-shaped structure. There is no main beam 8-1 inside the innermost ring beam 8-2, so that the tower crane 5 can pass through the inner ring beam 8-2.

[0042] When splicing the tire frame platform 8, the outermost ring beam 8-2 is not spliced ​​first. When the tire frame platform 8 is lifted later, the bracket 10 on the tank room concrete wall 2 will not hinder the movement of the spliced ​​tire frame. The two ring beams 8-2 of the tire frame platform 8 are connected to the standard section of the tower crane 5 through the wire rope 9, and a hand winch is arranged on the wire rope 9.

[0043] The tire frame platform 8 is designed using BIM technology and the connection points between the tire frame platform 8 and the wire rope 9 are calculated to ensure that the force load on the tire frame is reasonable. It is finally determined that the tire frame platform 8 has four ring beams 8-2 from the inside to the outside, and eight main beams 8-1 are evenly distributed around the center of the tire frame platform 8. The wire rope 9 is connected to the second ring beam 8-2 and the third ring beam 8-2 of the tire frame platform 8.

[0044] i. Lift the tire frame platform 8 upward to the designed height and secure it.

[0045] The tire frame platform 8 is lifted to the designed height by adding standard sections and adjusting the hand chain hoist. After the tire frame platform 8 is lifted to the designed height, the outermost ring beam 8-2 is spliced ​​and supported by the corbel 10, thereby fixing the tire frame platform 8 on the concrete wall 2 of the tank room.

[0046] j. Construction of the tank chamber dome 6 is carried out on the tire frame platform 8.

[0047] After the tire frame platform 8 is accepted, the back ribs and templates are laid on the tire frame platform 8, and then the steel bars are tied. After the steel bars are accepted, concrete is poured and maintained.

[0048] A structural hole 7 is left at the top center of the tank chamber dome 6.

[0049] First, the dome 6 formwork is constructed. Φ48×3.5 steel pipes are fully laid on the upper part of the ring beam 8-2 as the formwork back ribs, and multiple layers of wooden formwork are laid on the steel pipes.

[0050] As dome 6 has a large span and a large slope ratio, it needs to be constructed in sections. The chord inclination angle from the lower part of the thin shell to the spherical ring structure along the meridian direction is not large, so a single-sided formwork is selected. The inner formwork is prefabricated on-site in an enlarged style and assembled in sections (the whole sheet is used directly according to the specifications of the plywood to minimize random sawing and waste of wooden formwork). In order to facilitate construction, the inner formwork is assembled and installed to the top at one time.

[0051] Then the dome 6 reinforcement is installed. The equally divided warp reinforcement uses 12@800 threaded steel bars, which are bent on the ground and directly pulled into the inner curvature of the dome 6. The weft reinforcement uses φ14@400; the reinforcement is placed on the dome 6 template in situ, with the weft reinforcement placed first and the hoop reinforcement placed later, and tied firmly from top to bottom with annealed wire.

[0052] Finally, the concrete pouring construction is carried out. The dome 6 concrete pouring adopts the spiral rising method of first the lower part and then the upper part. The concrete uses commercial concrete, and the slump of the pump truck is controlled below 120mm. The concrete is vibrated with a small rod.

[0053] k. After the tank room dome 6 reaches the required strength, the tire frame platform 8 is removed.

[0054] The specific method of dismantling the supporting steel platform is as follows. After the concrete is poured, it is maintained, and the frame platform 8 can be dismantled only when the concrete strength reaches 100%. The dismantling process is to first dismantle the tower crane 5 operating room and the big arm, and then dismantle the tower crane 5 standard section, and then dismantle the tower crane 5 standard section through the structural hole 7, and then dismantle the frame platform 8 through the structural hole 7. After the frame platform 8 is dismantled, the unconstructed part of the top of the steel tank 3 is installed through the structural hole 7.

[0055] Before dismantling the steel platform, safety precautions should be taken. Technical safety briefings should be given to all personnel participating in the operation, and the dismantling operation should be carried out according to the determined plan under unified command. When dismantling the platform frame, the force-bearing components and wire ropes 9 of the frame should be fully checked to see if they meet the structural requirements, and safety technical briefings should be given to the construction personnel. When dismantling the steel platform, two or more people must be in a group. It is forbidden to dismantle the platform alone to prevent accidents caused by uneven force. When multiple people or groups are dismantling, they should strengthen command, ask each other and coordinate the operation steps. It is strictly forbidden to dismantle the platform arbitrarily without following the procedures. Temporary support and pulling measures should be added during the dismantling operation to prevent the platform from shaking and affecting the safety of the operation. The dismantling site should have reliable safety enclosures and be supervised by special personnel. Non-operating personnel are strictly prohibited from entering the dismantling operation area. It is strictly forbidden to throw the dismantled rod parts and materials to the ground. The materials that have been hoisted to the ground must be stacked in designated places to keep the site civilized.

[0056] After the tower crane 5 is dismantled, the bottom plate 4 of the steel tank 3 of the foundation part of the tower crane 5 is constructed.

[0057] The present invention is a BIM-based tank room dome 6 construction method. The lower part of the tank room dome 6 needs to be supported during construction. Since a full-floor scaffolding is used for support in the prior art, the steel tank 3 can only be constructed after the tank room dome 6 is constructed. Since the space left for materials to pass through after the tank room dome 6 is constructed is very small, the efficiency of material transportation is greatly affected, resulting in a long construction period.

[0058] The present invention adopts a tower crane 5 plus a tire frame platform 8 to change the original construction sequence of first constructing the dome 6 of the reinforced concrete tank room and then constructing the steel tank 3. The steel tank 3 is constructed first, and then the tank room dome 6 is constructed after the steel tank 3 is constructed. In this way, when the steel tank 3 is constructed, there is enough space for transporting materials. At the same time, adding the tower crane 5 as horizontal and vertical transportation equipment can greatly improve the transportation efficiency, thereby accelerating the construction period.

[0059] The present invention does not need to set up a full-house scaffolding, thus saving the scaffolding setting up and dismantling works. Since the tire frame platform 8 only exists between the top of the steel tank 3 and the tank chamber dome 6, the manufacturing, installation and dismantling works of the tire frame platform 8 are relatively small, thus reducing the construction cost.

Claims

1. A tank room dome construction method based on BIM, characterized in that: The following steps are involved: a. Earthwork construction: excavate the earth according to the layout position; b. Carry out the construction of the tank room foundation and at the same time construct the tower crane foundation at the center of the tank room foundation; c. Install the tower crane on the tower crane foundation; d.Construction of the concrete wall of the tank room; e. Use the tower crane to hoist the off-site steel tank bottom plate to the tank room foundation to carry out the construction of the steel tank bottom plate; f. Use tower crane to construct the steel tank by inverted installation method; g. Backfill the outside of the tank room; h. Use the top of the steel tank as a formwork platform to assemble the tire frame platform, and connect the tire frame platform to the tower crane through steel wire ropes; i. Lift the tire frame platform to the designed height and secure it; j. Carry out the construction of tank room dome on the tire frame platform; k. After the tank room dome reaches sufficient strength, the tire frame platform is removed.

2. The tank room dome construction method based on BIM according to claim 1 is characterized in that: When the tank room concrete wall is constructed, a corbel for supporting the tire frame platform is arranged on the top of the concrete wall.

3. The tank room dome construction method based on BIM according to claim 2 is characterized in that: The tire frame platform includes a main beam and several ring beams. When splicing the tire frame platform in step h, the outermost ring beams are not spliced ​​first. In step i, after the tire frame platform is lifted up to the designed height, the outermost ring beams are spliced ​​and supported by the corbels.

4. The tank room dome construction method based on BIM according to claim 1 is characterized in that: In step j, after the tire frame platform is accepted, the back ribs and formwork are laid on the tire frame platform, and then the steel bars are tied. After the steel bars are accepted, concrete is poured and cured.

5. The tank room dome construction method based on BIM according to claim 1 is characterized in that: In step h, the two ring beams of the tire frame platform are connected to the standard section of the tower crane through wire ropes, and a hand winch is arranged on the wire ropes. In step i, the tire frame platform is lifted to the designed height by installing the standard section and adjusting the hand winch.

6. The tank room dome construction method based on BIM according to claim 4 is characterized in that: The concrete pouring of the tank room dome adopts a spiral rising method of pouring the lower part first and then the upper part.

7. The tank room dome construction method based on BIM according to claim 1 is characterized in that: Use BIM technology to design the tire frame platform and calculate the connection points between the tire frame platform and the wire rope.

8. The tank room dome construction method based on BIM according to claim 1 is characterized in that: The part of the steel tank top that is higher than the tank room top will not be constructed first. Square wood is placed on the steel tank top as pads for the tire frame platform. After the tank room dome construction is completed, the remaining part of the steel tank top and the top equipment will be constructed.

Images