Tower crane foundation structure and construction method

Abstract

The present application relates to the technical field of building construction, and particularly relates to a tower crane foundation structure and a construction method, which comprises a tower crane outrigger, a first concrete column, a concrete waterproof stopper, a second concrete column, a tower crane foundation pile cap and a basement concrete bottom plate; the tower crane foundation pile cap is located at the lower part of the basement concrete bottom plate, and four concrete columns are arranged on the tower crane foundation pile cap and penetrate the basement concrete bottom plate; the first concrete column is at least partially embedded in the basement concrete bottom plate, a concrete waterproof stopper is arranged around the outer side of the first concrete column, the concrete waterproof stopper is embedded in the basement concrete bottom plate to form a physical water-blocking barrier; the tower crane outrigger is embedded in the second concrete column wrapped on the upper part of the first concrete column to avoid the problem of water corrosion of the outrigger during use; the tower crane outrigger is embedded in the second concrete column, the column body of the second concrete column completely protrudes above the basement concrete bottom plate, and after completion, the second concrete column can be removed to take out the outrigger for reuse.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, and in particular to a tower crane foundation structure and a construction method. BACKGROUND

[0002] When building a building, the tower crane is one of the most common hoisting equipment, which is often used to transport various construction materials, such as steel bars, boards, components, etc. The tower crane foundation is an important part of the tower crane, and is one of the important factors affecting the overall stability of the tower crane. The tower crane foundation is made of reinforced concrete. The foundation slab elevation is generally set the same as the basement bottom plate elevation. The anti-seepage technology is relatively mature, and the conditions for preventing the support leg from being corroded by accumulated water are relatively good. The support leg is difficult to recycle.

[0003] However, when the tower crane foundation has to be set below the basement bottom plate due to some special reasons (such as inaccurate pre-insertion of basement vertical components on the tower crane foundation, local policy requirements, etc.), how to ensure that the tower crane support leg is not corroded by accumulated water, ensure the anti-seepage effect between the tower crane foundation and the basement bottom plate, and the support leg can be recycled is a new and difficult problem.

[0004] The information disclosed in this BACKGROUND section is only intended to enhance the understanding of the general background of the application, and should not be construed as recognition or suggestion that this information forms the prior art known to those skilled in the art. SUMMARY

[0005] The present application provides a tower crane foundation structure and a construction method, thereby effectively solving the problems in the background art.

[0006] In order to achieve the above purpose, the technical solution adopted by the present application is as follows: a tower crane foundation structure, comprising:

[0007] a tower crane support leg, a first concrete column, a concrete waterproof stopper, a second concrete column, a tower crane foundation slab, and a basement concrete bottom plate;

[0008] The tower crane foundation slab is arranged at the lower part of the basement concrete bottom plate;

[0009] The first concrete column is at least partially embedded in the basement concrete bottom plate, and a concrete waterproof stopper is arranged around the outside of the first concrete column;

[0010] The second concrete column is arranged at the top of the first concrete column, and a pouring joint surface is arranged between the first concrete column and the second concrete column;

[0011] The second concrete column at least partially wraps the tower crane support leg.

[0012] Further, the first concrete column is entirely embedded in the basement concrete bottom plate.

[0013] Further, the first concrete column is partially embedded in the basement concrete bottom plate.

[0014] Further, the concrete waterproof stopper is a column structure protruding outside the first concrete column, and a structural steel bar is arranged in the concrete waterproof stopper.

[0015] Further, the tower crane foundation slab, the first concrete column and the concrete waterproof stopper are integrally formed.

[0016] Further, the top surface of the first concrete column is roughened for increasing the bonding force between the pouring surface of the first concrete column and the second concrete column.

[0017] The application also comprises a construction method of the tower crane foundation structure, which is used for the construction of the tower crane foundation structure as described above, and further comprises the following steps:

[0018] integrally forming the tower crane foundation slab, the first concrete column and the concrete waterproof stopper;

[0019] pre-burying and fixing the tower crane supporting leg;

[0020] binding the steel bars of the second concrete column, supporting the formwork of the second concrete column and pouring the second concrete column;

[0021] removing the formwork, curing, checking and repairing and ensuring the forming quality of the concrete waterproof stopper;

[0022] pouring the basement concrete bottom plate and curing.

[0023] Further, the forming quality of the concrete waterproof stopper is accepted before pouring the basement concrete bottom plate, so as to ensure the anti-leakage effect between the first concrete column and the basement concrete bottom plate.

[0024] Further, the pouring of the basement concrete bottom plate and the construction joint of the first concrete column are vibrated and compacted.

[0025] Further, the formwork is removed after the concrete strength reaches at least 75% of the design strength.

[0026] The beneficial effects of the application are as follows:

[0027] 1. In cases where the tower crane foundation platform is below the basement floor slab and cannot be raised, the pre-embedded position of the tower crane outriggers is raised by setting up the first and second concrete columns. The outriggers are pre-embedded in the second concrete column, which is higher than the basement concrete floor slab, and do not exceed the length of the basement concrete floor slab. As part of the basement concrete floor slab, they do not need to be removed. In this way, when pouring the basement concrete floor slab, it can be poured directly to the edge of the column and tightly wrapped and connected. There is no need to leave a post-pouring hole in the basement concrete floor slab, so there is no problem of water accumulation in the post-pouring hole. At the same time, the outriggers are wrapped and protected in the column, which solves the problem of water accumulation and corrosion of the outriggers from the root and prevents the tower crane outriggers from being corroded by water accumulation.

[0028] 2. A continuous concrete waterproof stop is installed at the midpoint of the outer side of each first concrete column. The concrete waterproof stop is poured in one continuous process with the first concrete column. When pouring the basement concrete slab, it is poured directly up to the edge of the first concrete column. The concrete waterproof stop acts as a water-blocking barrier between the first concrete column and the basement concrete slab, effectively preventing water leakage and solving the problem of seepage prevention at the construction joint between the first concrete column and the basement concrete slab.

[0029] 3. The tower crane outriggers are embedded in the second concrete column protruding from the concrete basement slab, rather than in the tower crane foundation platform. The length of the second concrete column protruding from the concrete basement slab is sufficient to meet the length of the outriggers to be embedded. After completion, the second concrete column protruding from the concrete basement slab can be directly chiseled out, and the tower crane outriggers can be removed to achieve outrigger recycling and reuse. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the tower crane foundation structure in Example 1;

[0032] Figure 2 In order to be in Figure 1 A magnified view of a section at point A in the middle;

[0033] Figure 3 This is a schematic diagram of the tower crane foundation structure in Example 2;

[0034] Figure 4 This is a schematic diagram of the tower crane foundation structure in Example 3;

[0035] Figures 5 to 7 A schematic diagram illustrating the construction method for tower crane foundation structures;

[0036] Figure 8 This is a flowchart of the tower crane foundation structure.

[0037] Attached reference numerals: 1. Tower crane outrigger; 2. First concrete column; 3. Second concrete column; 4. Basement concrete slab; 5. Tower crane foundation platform; 6. Concrete waterproof seal. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] In the description of this invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] This invention relates to the field of building construction technology, and in particular to a construction method for preventing water accumulation and leakage of the tower crane foundation and for making the outriggers recyclable when the tower crane foundation platform is located below the basement floor slab.

[0042] Example 1:

[0043] like Figures 1 to 2 As shown: A tower crane foundation structure, comprising:

[0044] Tower crane outrigger 1, first concrete column 2, second concrete column 3, tower crane foundation platform 5, and basement concrete slab 4;

[0045] The tower crane foundation platform 5 is located at the bottom of the concrete basement slab 4;

[0046] The first concrete column 2 is at least partially embedded in the basement concrete slab 4, and a concrete waterproof stop 6 is provided around the outside of the first concrete column 2.

[0047] The second concrete column 3 is arranged on the top of the first concrete column 2, and a pouring joint surface is arranged between the first concrete column 2 and the second concrete column 3.

[0048] The second concrete column 3 wraps at least part of the tower crane leg 1.

[0049] By arranging the tower crane leg 1, the first concrete column 2, the second concrete column 3, the tower crane foundation slab 5 and the basement concrete bottom plate 4, the tower crane foundation slab 5 is arranged on the lower part of the basement concrete bottom plate 4, the first concrete column 2 is at least partially embedded in the basement concrete bottom plate 4, the concrete waterproof stop 6 is arranged around the outer side of the first concrete column 2, the second concrete column 3 is arranged on the top of the first concrete column 2, and a pouring joint surface is arranged between the first concrete column 2 and the second concrete column 3. The second concrete column 3 wraps the tower crane leg 1, four concrete columns are arranged on the tower crane foundation slab 5 to pass through the basement concrete bottom plate 4, and the basement concrete bottom plate 4 is poured in one time to the periphery of the first concrete column 2, so that water accumulation is avoided. The second concrete column 3 wraps the bottom of the tower crane leg 1, solves the problem of water accumulation and rust of the tower crane leg 1, avoids the hidden trouble of water accumulation and rust of the tower crane leg 1 in the use process, and improves the quality and safety.

[0050] The concrete waterproof stop 6 with a protruding column is arranged around the outer side of each first concrete column 2, which solves the leakage problem between the first concrete column 2 and the basement concrete bottom plate 4, and improves the anti-leakage effect of the construction joint between the tower crane foundation and the basement concrete bottom plate 4.

[0051] The tower crane leg 1 is embedded in the protruding second concrete column 3 instead of the tower crane foundation slab, and the length of the second concrete column 3 protruding from the basement concrete bottom plate is sufficient for the embedding length of the tower crane leg 1. After completion, the second concrete column 3 is directly removed, and the tower crane leg 1 is taken out to realize the recycling of the tower crane leg 1.

[0052] The pouring joint surface refers to the surface of pouring and connecting between the first concrete column 2 and the second concrete column 3.

[0053] According to the site construction condition, the number of the tower crane foundation slab 5 is confirmed, four concrete columns are arranged above each foundation slab for supporting the tower crane leg 1. A horizontal foundation beam is arranged between the four second concrete columns 3, which is also a concrete material for connecting the four second concrete columns 3 and increasing the strength between the second concrete columns 3, thereby increasing the stability of the tower crane leg 1.

[0054] As a preferred embodiment of the above, the first concrete column 2 is completely embedded in the basement concrete bottom plate 4 as a component of the basement concrete bottom plate 4.

[0055] Preferably, the first concrete column 2 is entirely embedded in the basement concrete bottom plate 4, that is, the thickness of the first concrete column 2 is equal to the thickness of the basement concrete bottom plate 4, the second concrete column 3 is arranged on the top of the first concrete column 2, is combined with the first concrete column 2 in pouring, the first concrete column 2 and the second concrete column 3 form an integral whole, and the tower crane support leg 1 is embedded in the protruding second concrete column 3, thereby solving the problem of water accumulation corroding the tower crane support leg 1, avoiding the hidden danger of water accumulation and corrosion of the tower crane support leg 1 in the use process, and improving the quality and safety.

[0056] In the embodiment, the concrete waterproof stop 6 is a column structure protruding on the outer side of the first concrete column 2, and the concrete waterproof stop 6 is internally provided with structural steel bars.

[0057] By arranging the concrete waterproof stop 6 as a continuous column structure protruding on the outer side of the first concrete column 2, and internally providing the concrete waterproof stop 6 with structural steel bars for strengthening the strength of the concrete waterproof stop 6, neither the main reinforcement of the first concrete column 2 needs to be welded with a waterproof steel plate, nor the thickness of the column steel reinforcement protective layer needs to be increased to arrange a groove for placing a water expansion waterproof strip, thereby well solving the leakage problem between the column and the basement concrete bottom plate.

[0058] The first concrete column 2 has a height same as the thickness of the basement concrete bottom plate 4, and a continuous column body concrete waterproof stop 6 is arranged on the periphery of the column, and the first concrete column 2 and the concrete waterproof stop 6 are integrally poured.

[0059] The concrete waterproof stop 6 of the first concrete column 2 is embedded in the basement concrete bottom plate 4, so that the twice-poured concrete components form an integrated anti-leakage effect.

[0060] The tower crane foundation pile cap 5, the first concrete column 2 and the concrete waterproof stop 6 are integrally poured.

[0061] By arranging the tower crane foundation pile cap 5, the first concrete column 2 and the concrete waterproof stop 6 to be integrally poured, the basement concrete bottom plate 4 is poured to the column periphery of the first concrete column 2, and water accumulation is avoided, thereby well solving the problem of water accumulation corroding the tower crane support leg 1.

[0062] As a preferred embodiment of the above embodiment, the top surface of the first concrete column 2 is roughened for increasing the adhesion between the pouring surfaces of the first concrete column 2 and the second concrete column 3. Thus, the pouring surfaces are more firm, and a connecting piece can be additionally arranged between the pouring combination surfaces of the first concrete column 2 and the second concrete column 3 for making the pouring of the first concrete column 2 and the second concrete column more firm.

[0063] The top surface of the first concrete column 2 should be chiseled to increase the bonding force between the first concrete column 2 and the second concrete column 3, and the height of the second concrete column 3 meets the pre-buried height of the tower crane leg 1 in the tower crane manufacturer's manual.

[0064] The concrete strength of the first concrete column 2 should be at least 75% of the design strength, and the concrete waterproof stop 6 part should not be removed by using a crowbar when the formwork is removed, and attention should be paid to the protection of the finished product of the concrete waterproof stop 6.

[0065] Example 2:

[0066] As shown in Figure 3 , unlike example 1, the thickness of the first concrete column 2 is lower than the thickness of the basement concrete bottom plate 4, the second concrete column 3 is arranged on the top of the first concrete column 2 and is combined with the first concrete column 2, and the tower crane leg 1 is pre-buried in the protruding second concrete column 3, which can achieve the effect of waterproofing. In this way, the second concrete part is arranged in the basement concrete bottom plate 4, which causes construction difficulty in subsequent dismounting of the tower crane leg 1.

[0067] Example 3:

[0068] As shown in Figure 4 , unlike example 1, the first concrete column 2 is partially embedded in the basement concrete bottom plate 4.

[0069] The thickness of the first concrete column 2 is higher than the thickness of the basement concrete bottom plate 4, the second concrete column 3 is also arranged on the top of the first concrete column 2 and is combined with the first concrete column 2, and the tower crane leg 1 is pre-buried in the protruding second concrete column 3, which can achieve the effect of waterproofing. In this way, the first concrete column 2 is partially arranged outside the basement concrete bottom plate 4, and the subsequent chiseling of the first concrete column 2 and the removal of the tower crane leg 1 can realize the recycling of the tower crane leg 1, thereby reducing the cost.

[0070] As shown in Figures 5 to 8 , the present application also includes a construction method of a tower crane foundation structure, which is used for the construction of the above-mentioned tower crane foundation structure and is preferred as the above-mentioned examples, and includes the following steps:

[0071] According to the site construction condition, the number of tower crane foundation slabs 5 is confirmed, four concrete columns are arranged above each foundation slab, and the tower crane leg 1 is fixed;

[0072] S10: as shown in Figure 5 , the tower crane foundation slab 5, the first concrete column 2 and the concrete waterproof stop 6 are integrally poured and formed; after the concrete strength reaches at least 75% of the design strength, the formwork is removed, attention is paid to the protection of the concrete waterproof stop 6, the structure of the concrete waterproof stop 6 is prevented from being damaged by external force, and the waterproof effect is affected.

[0073] S20: pre-burying and fixing the tower crane support leg 1;

[0074] S30: as shown, binding the steel bars of the second concrete column 3, supporting the formwork of the second concrete column 3, and pouring the second concrete column 3; Figure 6

[0075] A circle of steel bars is installed 2 cm inside the formwork, the tower crane support leg 1 is placed inside the steel bars, the tower crane support leg 1 is placed at the center position of the column, the second concrete column 3 after pouring forms an integral whole with the first concrete column 2, and the steel bars increase the strength of the concrete.

[0076] It should be noted that the steel bars are not bound before being placed in the formwork, and the steel bars are bound after the installation of the tower crane support leg 1 is completed, so as to prevent the longitudinal steel bars from affecting the installation of the tower crane support leg 1, facilitate the installation of the tower crane support leg 1, and improve the installation efficiency.

[0077] S40: formwork removal, maintenance, checking and supplementing, and ensuring the forming quality of the concrete waterproof joint 6;

[0078] S50: as shown, pouring the concrete bottom plate 4 and maintaining. Figure 7

[0079] It should be noted that there is no sequence requirement between the second concrete column 3 and the basement concrete bottom plate 4, and the second concrete column 3 can be poured onto the first concrete column 2 first, and then the pouring of the basement concrete bottom plate 4 is performed; or the basement concrete bottom plate 4 can be poured first, and then the second concrete column 3 is poured onto the first concrete column 2.

[0080] As a preferred embodiment of the above embodiment, before pouring the basement concrete bottom plate 4, the forming quality of the concrete waterproof joint 6 is also subjected to acceptance inspection, so as to ensure the anti-leakage effect between the first concrete column 2 and the basement concrete bottom plate 4.

[0081] As a preferred embodiment of the above embodiment, the pouring of the basement concrete bottom plate 4 and the construction joint vibration compaction of the first concrete column 2 are performed.

[0082] Before pouring the basement concrete bottom plate 4, the anti-leakage measures around the first concrete column 2 should be subjected to acceptance inspection, the construction joint of the first concrete column 2 should be vibrated and compacted during pouring, especially the joint parts should be vibrated and compacted, and at the same time, the vibration rod should pay attention to the protection of the finished product of the concrete waterproof joint 6. Within 7 days after pouring, the concrete should be watered and covered for maintenance every day, especially the maintenance of the construction joint parts of the first concrete column 2.

[0083] As a preferred embodiment of the above embodiment, after the concrete strength reaches at least 75% of the design strength, the formwork is removed and the waterproof joint should not be damaged.

[0084] ​​Before the formwork is removed, the concrete strength should reach at least 75% of the design strength. When removing the formwork, the concrete waterproof stop 6 should not be removed with a pry bar. Special attention should be paid to protecting the finished product of the concrete waterproof stop 6.

[0085] Beneficial effects:

[0086] 1. In the case where the tower crane foundation platform 5 is located below the basement floor slab and cannot be raised, the pre-embedded position of the tower crane leg 1 is raised by setting the first concrete column 2 and the second concrete column 3. The tower crane leg 1 is partially embedded in the second concrete column 3, not exceeding the length of the basement concrete floor slab 4, and is a component of the basement concrete floor slab 4 without needing to be removed. In this way, when pouring the basement concrete floor slab 4, it can be poured directly to the edge of the column and tightly wrapped and connected, without leaving a post-pouring hole on the basement concrete floor slab 4, thus avoiding the problem of water accumulation in the post-pouring hole. At the same time, the tower crane leg 1 is wrapped and protected in the column, which solves the problem of water accumulation and corrosion of the tower crane leg 1 from the root and prevents the tower crane leg 1 from being corroded by water accumulation.

[0087] 2. A continuous concrete waterproof stop 6 is installed at the midpoint of the outer side of each first concrete column 2. The concrete waterproof stop 6 is poured in one go with the first concrete column 2. When pouring the basement concrete slab 4, it is poured directly up to the edge of the first concrete column 2. The concrete waterproof stop 6 acts as a water-blocking barrier between the first concrete column 2 and the basement concrete slab 4, effectively preventing water leakage and solving the problem of seepage prevention at the construction joint between the first concrete column 2 and the basement concrete slab 4.

[0088] 3. The tower crane outrigger 1 is embedded in the second concrete column 3 protruding from the concrete base 4 of the basement, rather than in the tower crane foundation 5. The length of the second concrete column 3 protruding from the concrete base 4 of the basement is sufficient to meet the pre-embedded length of the tower crane outrigger 1. After completion, the second concrete column 3 protruding from the concrete base 4 of the basement can be directly chiseled out, and the tower crane outrigger 1 can be taken out to achieve the recycling and reuse of the tower crane outrigger 1.

[0089] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A tower crane foundation structure, characterized in that, include: Tower crane outriggers, first concrete column, concrete waterproof seal, second concrete column, tower crane foundation platform, and basement concrete slab; The tower crane foundation platform is located at the bottom of the concrete basement slab; The first concrete column is at least partially embedded in the concrete basement slab. A concrete waterproof stop is provided around the outside of the first concrete column. The concrete waterproof stop is a column structure protruding from the outside of the first concrete column. Structural steel bars are provided inside the concrete waterproof stop. The second concrete column is located on top of the first concrete column, and a pouring joint surface is provided between the first concrete column and the second concrete column; The second concrete column at least partially encloses the tower crane legs. The length of the second concrete column above the concrete basement slab meets the pre-embedded length of the tower crane legs. After completion, the second concrete column above the concrete basement slab is directly chiseled out, and the tower crane legs are removed to achieve the recycling and reuse of the tower crane legs.

2. The tower crane foundation structure according to claim 1, characterized in that, The first concrete column is completely embedded in the concrete basement slab.

3. The tower crane foundation structure according to claim 1, characterized in that, The first concrete column is partially embedded in the concrete basement slab.

4. The tower crane foundation structure according to claim 1, characterized in that, The tower crane foundation platform, the first concrete column, and the concrete waterproof seal are all cast in one go.

5. The tower crane foundation structure according to claim 1, characterized in that, The top surface of the first concrete column is roughened to increase the bond strength between the casting surfaces of the first and second concrete columns.

6. A construction method for a tower crane foundation structure, used for the construction of the tower crane foundation structure as described in claim 1, characterized in that, Includes the following steps: The tower crane foundation platform, the first concrete column, and the concrete waterproof stop were cast in one go. Pre-embedded and fixed tower crane outriggers; Tie the reinforcing bars of the second concrete column, erect the formwork for the second concrete column, and pour the second concrete column; Template removal, maintenance, inspection and repair, and ensuring the quality of waterproof sealing joint forming; Pour the concrete base slab for the basement and then cure it.

7. The construction method for the tower crane foundation structure according to claim 6, characterized in that, Before pouring the concrete basement slab, the quality of the concrete waterproof seal is inspected to ensure the anti-seepage effect between the first concrete column and the concrete basement slab.

8. The construction method for the tower crane foundation structure according to claim 6, characterized in that, The construction joint between the concrete basement slab and the first concrete column was vibrated and compacted.

9. The construction method for the tower crane foundation structure according to claim 6, characterized in that, The formwork should be removed once the concrete strength reaches at least 75% of the design strength.

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