A common foundation for tower crane conversion and its construction method

Abstract

The present application relates to a common foundation for tower crane conversion and a construction method thereof, and relates to the field of building construction technology. The construction method of the common foundation for tower crane conversion includes the following steps: S1: preliminary preparation; S2: using the embedded section of the heavy tower crane as the main load-bearing component, the embedded section is provided with a footing one for connecting with the heavy tower crane, and a footing two for connecting with the light tower crane is installed on the embedded section; S3: excavating a foundation pit, and installing a horse stool in the foundation pit; S4: connecting the embedded section with the horse stool, and the footing one and the footing two are exposed to the ground; S5: pouring concrete into the foundation pit. The coordination of the various components in the present application can complete the construction of the common foundation, and the common foundation can be used for conversion of different tower cranes. The common foundation uses the original embedded section of the heavy tower crane as the load-bearing component of the foundation, and there is no need to make new embedded sections. Therefore, the common foundation can meet the construction needs and save production costs.

Description

Technical Field

[0001] The present application relates to the field of building construction technology, and in particular to a common foundation for tower crane conversion and a construction method thereof. Background Art

[0002] The structural form of large-scale sports stadiums and exhibition halls is generally: the main structure adopts a reinforced concrete frame structure, and the partial structure adopts a rigid structure; the roof structure adopts steel trusses, grids and other steel structures. When organizing the construction of such large-scale venues, the selection of lifting and hoisting equipment is particularly important. Different lifting and hoisting equipment needs to be selected at different construction stages to fully present the overall technical solution.

[0003] In actual operations, QTZ615 type tower crane is mostly used in the main structure construction phase. QTZ615 type tower crane has a smaller lifting weight and is a light tower crane. Taking 80-meter arm length as an example, the maximum lifting weight of QTZ615 type tower crane is about 26 tons, and the end lifting weight is about 3.5 tons. It is mainly suitable for reinforced concrete structure construction and the lifting of small H-shaped steel structure components such as steel rods and steel beams of rigid structures; QTZ1800 type tower crane is mostly used in the roof steel structure construction phase. QTZ1800 type tower crane has a larger lifting weight and is a heavy tower crane. Taking 80-meter arm length as an example, the maximum lifting weight of QTZ1800 type tower crane is about 64 tons, and the end lifting weight is about 18 tons. It can be used for lifting larger steel structure components.

[0004] In order to achieve the replacement of different tower cranes at different construction stages, two independent tower crane embedded sections and foundations need to be prepared on site. On the one hand, this leads to an increase in economic costs. The production of two embedded sections and foundations requires more materials such as steel bars and concrete. On the other hand, in order to install two tower cranes at different positions, the construction site has to reserve more openings, which will lead to reduced construction quality and increased safety risks. Summary of the invention

[0005] In order to improve the problem in the prior art that in order to achieve the replacement of different tower cranes at different construction stages, it is necessary to prepare embedded sections and foundations of two independent tower cranes, the present application provides a common foundation for tower crane conversion and a construction method thereof.

[0006] The application provides a common foundation for tower crane conversion and a construction method thereof, which adopts the following technical solutions:

[0007] A construction method for a common foundation for tower crane conversion comprises the following steps:

[0008] S1: Preliminary preparation: determine and analyze the specifications of the tower crane required at the construction site according to construction requirements;

[0009] S2: prepare a common foundation, use the embedded section of the heavy tower crane as the main load-bearing member, the embedded section is provided with a first anchor for connecting with the heavy tower crane, and a second anchor for connecting with the light tower crane is installed on the embedded section;

[0010] S3: Construction preparation, excavation of foundation pit, installation of horse stool in the foundation pit;

[0011] S4: Install the common foundation, connect the embedded section with the horse stool, and expose the first and second anchors to the ground;

[0012] S5: Fix the common foundation and pour concrete into the foundation pit.

[0013] By adopting the above technical solution, before making the common foundation, the construction requirements are first analyzed to clarify the lifting requirements, determine the specifications of the tower crane required for the construction site, and then analyze the tower crane required for the construction site; thereafter, the embedded section of the heavy tower crane is used as the main load-bearing component, and the embedded section is provided with the original anchor 1 for connecting with the heavy tower crane. Subsequently, the anchor 2 for connecting with the light tower crane is added to the embedded section, and the anchor 2 and the embedded section together constitute the common foundation. At this time, the common foundation is equipped with both anchor 1 and anchor 2, that is, the common foundation can be connected with the heavy tower crane. It can be connected with a tower crane and can also be connected with a light tower crane; when the common foundation is prepared, the common foundation is transported to the construction site, and then a foundation pit is excavated at the construction site, and a horse stool for connecting with the embedded section is installed in the foundation pit; then, the embedded section is connected to the horse stool, thereby installing the embedded section in the foundation pit, and the anchor one and the anchor two are exposed to the ground; and when the installation of the embedded section is completed, concrete is poured into the foundation pit, and after the concrete solidifies, the common foundation is fixed in the foundation pit, and the anchor one and the anchor two are also fixed and exposed to the ground for connection with the tower crane.

[0014] The cooperation of various components in the above process can complete the construction of the common foundation. The common foundation can be converted for different tower cranes, and it can meet the installation of tower cranes of different specifications at the same time. The common foundation uses the embedded sections of the original heavy tower crane as the load-bearing components of the foundation, and there is no need to make new embedded sections. Therefore, the common foundation can not only meet the construction needs but also save production costs.

[0015] Optionally, a plurality of supporting legs are provided at the bottom of the horse stool, and the ends of the supporting legs away from the horse stool have horizontal bent sections; in step S3, when installing the horse stool in the foundation pit, the bent sections of the supporting legs are fitted into the foundation pit, and the horizontality of the horse stool is checked. After ensuring that the horse stool is in a horizontal state, concrete is poured at the supporting legs to form a cushion layer.

[0016] By adopting the above technical solution, the horse stool is connected to the embedded section to install the embedded section in the foundation pit, and before connecting the horse stool to the embedded section, the horse stool needs to be installed and fixed in the foundation pit. When installing the horse stool, fit the bending sections on the multiple legs with the bottom surface of the foundation pit. At this time, the multiple legs jointly support the horse stool. Since the bending sections are set horizontally, the horse stool is in a horizontal state; after the placement of the horse stool is completed, check the horizontality of the horse stool. After ensuring that the horse stool is in a horizontal state, pour concrete into the foundation pit. The concrete forms a cushion layer at the legs, thereby fixing the horse stool, and then the embedded section can be installed. The coordination of the various components in the above process can complete the installation of the horse stool. By ensuring the horizontality of the horse stool, the horizontality of the subsequent embedded section installation can be used to avoid the tilt of the embedded section and ensure the verticality of the embedded section.

[0017] Optionally, there is a space between the cushion layer and the horse stool. After the concrete of the cushion layer solidifies, the bottom layer of steel bars connected to the supporting legs are tied between the cushion layer and the horse stool.

[0018] By adopting the above technical scheme, after the concrete of the cushion layer solidifies, the bottom layer of steel bars is tied in the space formed by the cushion layer and the horse stool, and the bottom layer of steel bars is connected to the supporting legs. The bottom layer of steel bars is used to improve the tightness of the connection between the multiple supporting legs, and improve the stability of the multiple supporting legs when located in the foundation pit. At the same time, during the process of tying the bottom layer of steel bars, the horizontality of the horse stool can also be adjusted.

[0019] Optionally, a first threaded hole is provided on the horse stool, and a connecting bolt is threadedly connected to the embedded section; in step S4, when the embedded section is connected to the horse stool, the connecting bolt is docked with the first threaded hole, and the connecting bolt is screwed into the first threaded hole to connect the embedded section to the horse stool.

[0020] By adopting the above technical solution, when connecting the embedded joint and the horse stool, the connecting bolt is docked with the first threaded hole, and then the connecting bolt is screwed so that the connecting bolt is threadedly connected to the first threaded hole. The connecting bolt thereby connects the horse stool and the embedded joint, and the connection method is simple and easy to operate; in addition, the embedded joint can also be aligned by adjusting the connecting bolt on the embedded joint, thereby ensuring the verticality of the embedded joint.

[0021] Optionally, in step S4, after the embedded section is connected to the horse stool, the surface layer steel bars are tied around the embedded section.

[0022] By adopting the above technical solution, after the embedded section is connected to the horse stool, the surface steel bars are tied around the embedded section to improve the stability of the embedded section in the foundation pit and avoid the embedded section being impacted and tilted when concrete is subsequently poured into the foundation pit.

[0023] Optionally, a fixing rod is provided on the second anchor, and a plurality of reinforcement rods are staggeredly provided on the fixing rod, and the plurality of reinforcement rods are all fixedly connected to the embedded section.

[0024] By adopting the above technical solution, the cooperation of the fixing rod and the plurality of reinforcing rods can improve the stability of the second anchor when it is located on the embedded joint, and improve the connection strength between the second anchor and the embedded joint.

[0025] A common foundation for tower crane conversion is applied to the construction method of the common foundation for tower crane conversion, including a pre-embedded section, on which a plurality of first anchors are arranged around the pre-embedded section, and a plurality of second anchors are arranged around the inner sides of the plurality of first anchors.

[0026] By adopting the above technical solution, the common foundation includes a pre-buried section for being buried in a foundation pit, a plurality of anchors 1 are arranged around the pre-buried section, the anchors 1 can be connected to a heavy tower crane, and a plurality of anchors 2 are arranged on the inner side of the plurality of anchors 1, the anchors 2 can be connected to a light tower crane, thereby making the common foundation convertible for different tower cranes and able to simultaneously meet the installation requirements of tower cranes of different specifications.

[0027] Optionally, the embedded section includes a plurality of support rods, each of which is provided with a ground anchor 1, the plurality of support rods are arranged in a surrounding manner, a connecting rod is provided between two adjacent support rods, each of which is provided with a ground anchor 2, and a reinforcing rod is also provided between two adjacent support rods.

[0028] By adopting the above technical scheme, the support rods and the connecting rods are used to support the anchors one and two, and the support rods and the connecting rods cooperate to form the basic frame of the embedded section. The embedded section as a whole is composed of a frame structure, which can reduce the dead weight of the embedded section, improve the convenience of the embedded section during transportation, facilitate the transportation of the embedded section to the construction site, and facilitate the installation of the embedded section into the foundation pit; the reinforcing rod between the two adjacent support rods can improve the tightness of the connection between the support rods, thereby improving the overall strength of the embedded section.

[0029] Optionally, a support plate is provided at the bottom of the support rod, and a plurality of connecting bolts are threadedly connected to the support plate.

[0030] By adopting the above technical solution, the embedded section is connected to the horse stool through the connecting bolts on the support plate. The connection method is simple and easy to operate, and has high flexibility.

[0031] Optionally, a plurality of bolts are provided on the support rod along the length and width directions.

[0032] By adopting the above technical solution, after the embedded section is installed in the foundation pit, concrete needs to be poured into the foundation pit, thereby fixing the embedded section and burying it in the foundation pit, and the bolts can be used to enhance the bonding ability between the support rod and the concrete, thereby improving the stability of the embedded section when it is located in the foundation pit.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. The cooperation of various components in this application can complete the construction of the common foundation. The common foundation can be converted for different tower cranes, which can simultaneously meet the installation of tower cranes of different specifications. The common foundation uses the pre-buried sections of the original heavy tower crane as the load-bearing components of the foundation, and there is no need to make new pre-buried sections. Therefore, the common foundation can meet the construction requirements and save production costs;

[0035] 2. When connecting the embedded joint to the horse stool, dock the connecting bolt with the first threaded hole, and then screw the connecting bolt so that the connecting bolt is threadedly connected to the first threaded hole. The connecting bolt thus connects the horse stool to the embedded joint. The connection method is simple and easy to operate. In addition, the embedded joint can be aligned by adjusting the connecting bolt on the embedded joint, thereby ensuring the verticality of the embedded joint.

[0036] 3. The support rods and the connecting rods are used to support the anchors one and two. The support rods and the connecting rods cooperate with each other to form the basic frame of the embedded section. The embedded section as a whole is composed of a frame structure, which can reduce the weight of the embedded section and improve the convenience of the embedded section during transportation. It is beneficial to transport the embedded section to the construction site and to install the embedded section in the foundation pit. The reinforcing rods between the two adjacent support rods can improve the tightness of the connection between the support rods, thereby improving the overall strength of the embedded section. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of a common foundation in a construction method of a common foundation that can be used for tower crane conversion in Example 1 of the present application;

[0038] Figure 2 yes Figure 1 A top view of

[0039] Figure 3 It is a schematic diagram of the horse stool in the application embodiment 1;

[0040] Figure 4 is a schematic diagram of the common foundation in the application embodiment 1 being installed in the foundation pit;

[0041] Figure 5 It is a schematic diagram of the coordination of the common foundation, the oblique reinforcement, the surface reinforcement and the tie reinforcement in the first embodiment of the application;

[0042] Figure 6 It is a schematic diagram of a common foundation for tower crane conversion in Example 2 of the present application;

[0043] Figure 7 yes Figure 6 A magnified view of part A;

[0044] Figure 8 It is a structural schematic diagram of the QTZ1800 tower crane selected in Example 2 of the present application.

[0045] Explanation of the reference numerals in the accompanying drawings: 1. Embedded section; 2. Anchor one; 3. Anchor two; 4. Support rod; 5. Connecting rod; 6. Reinforcing rod; 7. Bolt; 8. Support plate; 9. Connecting bolt; 10. Horse stool; 11. Air vent; 12. Mounting plate; 13. Connecting plate; 14. Support plate; 15. Pin hole; 16. Reinforcing plate; 17. Second connecting seat; 18. Reinforcement rod; 19. Support foot; 20. Bending section; 21. Pad layer; 22. Bottom layer of steel bars; 23. Fixing rod; 24. Diagonal tie bars; 25. Surface layer of steel bars; 26. Tie bars. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1-8 This application is described in further detail.

[0047] Example 1

[0048] Embodiment 1 of the present application discloses a construction method of a common foundation for tower crane conversion, comprising the following steps:

[0049] S1: Preliminary preparation: determine and analyze the specifications of the tower crane required at the construction site according to construction requirements;

[0050] S2: Reference Figure 1 and Figure 2 , prepare a common foundation, use the embedded section 1 of the heavy tower crane as the main load-bearing member, the embedded section 1 is provided with a foot 2 for connecting with the heavy tower crane, and the embedded section 1 is additionally provided with a foot 2 for connecting with the light tower crane;

[0051] S3: Construction preparation, laying out the common foundation, excavating the foundation pit,

[0052] Reference Figure 3 and Figure 4 , multiple horse stools 10 are installed in the foundation pit, a first threaded hole is opened on the horse stool 10, a plurality of legs 19 are arranged at the bottom of the horse stool 10, the legs 19 are made of steel bars, and one end of the plurality of legs 19 away from the horse stool 10 has a horizontal bending section 20;

[0053] Fit the bent section 20 of the support leg 19 to the foundation pit, check the levelness of the horse stool 10, and after ensuring that multiple horse stools 10 are in a horizontal state, pour concrete at the support leg 19 to form a cushion layer 21;

[0054] There is space between the cushion layer 21 and the horse stool 10. After the concrete reaches a certain strength (preferably 48 hours), the bottom steel bar 22 connected to the support leg 19 is tied between the cushion layer 21 and the horse stool 10. The bottom steel bar 22 passes through the space between the horse stool 10 and the cushion layer 21. When the bottom steel bar 22 passes under the horse stool 10 plate, it is not allowed to cut off the bottom steel bar 22;

[0055] S4: Reference Figure 1 and Figure 4 , install the common foundation, the embedded section 1 is threadedly connected with a connecting bolt 9, the connecting bolt 9 is butted with the first threaded hole on the horse stool 10, the connecting bolt 9 is screwed into the first threaded hole to connect the embedded section 1 to the horse stool 10, the connecting bolt 9 is adjusted to align the embedded section 1, and the verticality error of the embedded section 1 is ensured to be less than 1 / 1000;

[0056] Foot 1 2 and foot 2 3 are exposed above the ground;

[0057] Reference Figure 5 , tie the oblique tie bar 24 on the embedded section 1, the upper end of the oblique tie bar 24 is welded on the embedded section 1, and the lower end is tied to the bottom steel bar 22, and the surface steel bar 25 and the tie bar 26 are tied around the embedded section 1;

[0058] Check the horizontality of the embedded section 1, and measure the height of the anchor 1 2 and the anchor 2 3 above the ground;

[0059] S5: Fix the common foundation and pour concrete into the foundation pit;

[0060] Check the height of footing 1 2 and footing 2 3 above the ground to ensure that they are the same as the measured values ​​before pouring;

[0061] Carry out concrete maintenance.

[0062] In the embodiment of the present application, in order to further improve the stability of the second anchor 3 when it is located on the embedded section 1 , a fixing rod 23 is welded to the second anchor 3 , and the fixing rod 23 is welded to the embedded section 1 .

[0063] In the embodiment of the present application, after the excavation of the foundation pit is completed, the slope method around the foundation pit needs to be determined according to the soil conditions. The soil layer at the bottom of the foundation pit needs to reach a certain foundation bearing capacity, and if necessary, strengthening technical measures such as sand and gravel replacement, soil reinforcement, and pile foundation can be adopted.

[0064] The implementation principle of the construction method of a common foundation for tower crane conversion in Example 1 of the present application is as follows: before making the common foundation, the construction requirements are first analyzed to clarify the hoisting requirements, determine the specifications of the tower crane required at the construction site, and then analyze the tower crane required at the construction site; thereafter, the embedded section 1 of the heavy tower crane is used as the main load-bearing component, and the embedded section 1 is provided with the original anchor 1 2 for connecting with the heavy tower crane, and then the anchor 2 3 for connecting with the light tower crane is added to the embedded section 1, and the anchor 2 3 and the embedded section 1 together constitute a common foundation. At this time, the common foundation is equipped with both anchor 1 2 and anchor 2 3, that is: The common foundation can be connected to both heavy tower cranes and light tower cranes; after the common foundation is prepared, it is transported to the construction site, and then a foundation pit is excavated at the construction site, and a horse stool 10 for connecting with the embedded section 1 is installed in the foundation pit; then, the embedded section 1 is connected to the horse stool 10, thereby installing the embedded section 1 in the foundation pit, and at this time, the anchor 1 2 and the anchor 2 3 are exposed to the ground; and after the installation of the embedded section 1 is completed, concrete is poured into the foundation pit, and after the concrete solidifies, the common foundation is fixed in the foundation pit, and at this time, the anchor 1 2 and the anchor 2 3 are also fixed and exposed to the ground for connection with the tower crane.

[0065] The cooperation of various components in the above process can complete the construction of the common foundation. The common foundation can be converted for different tower cranes, and it can simultaneously meet the installation of tower cranes of different specifications. The common foundation utilizes the embedded section 1 of the original heavy tower crane as the load-bearing member of the foundation, and there is no need to make new embedded sections 1. Therefore, the common foundation can not only meet the construction needs, but also save production costs.

[0066] Example 2

[0067] Example 2 of the present application discloses a common foundation for tower crane conversion, which is applied to the construction method of a common foundation for tower crane conversion in Example 1, with reference to Figure 1 and Figure 2 The common foundation for tower crane conversion includes a pre-buried section 1 for being buried in a foundation pit, a plurality of anchors 2 and a plurality of anchors 2 3 are arranged on the top of the pre-buried section 1, the anchor 1 2 is used to connect with a heavy tower crane, the anchor 2 3 is used to connect with a light tower crane, the plurality of anchors 1 2 are arranged around, the plurality of anchors 2 3 are arranged around the inner side of the plurality of anchors 1 2, and a connector for connecting with the foundation pit is arranged at the bottom of the pre-buried section 1.

[0068] Reference Figure 1 and Figure 6The embedded section 1 includes a plurality of support rods 4, each of which is provided with a ground foot 2, and the plurality of support rods 4 are arranged in a surrounding manner, and a reinforcing rod 6 is arranged between two adjacent support rods 4; a connecting rod 5 is arranged between two adjacent support rods 4, and the end of the connecting rod 5 is fixed to the top of the support rod 4, each connecting rod 5 is provided with a ground foot 2 3, and each ground foot 2 3 is fixed with a fixing rod 23.

[0069] Reference Figure 1 and Figure 6 A plurality of reinforcing rods 18 are staggered on the connecting rod 5, some of the reinforcing rods 18 are fixed to the connecting rod 5 and the fixing rod 23 at the same time, and another part of the reinforcing rods 18 are fixed to the supporting rod 4 and the fixing rod 23 at the same time. The reinforcing rods 18 are used to improve the tightness of the connection between the anchor 2 3 and the connecting rod 5 and the supporting rod 4, thereby improving the stability of the anchor 2 3 when it is located on the embedded node 1.

[0070] Reference Figure 1 and Figure 6 The support rod 4, the connecting rod 5, the reinforcing rod 6, the fixing rod 23 and the reinforcing rod 18 are all selected to be H-shaped steel structures, which are simple to manufacture and low in cost.

[0071] Reference Figure 1 and Figure 6 A plurality of bolts 7 are arranged on the support rod 4 along the length and width directions. After the embedded section 1 is installed in the foundation pit, concrete needs to be poured into the foundation pit to fix the embedded section 1 and bury it in the foundation pit. The bolts 7 are used to enhance the bonding ability between the support rod 4 and the concrete, thereby improving the stability of the embedded section 1 when it is located in the foundation pit.

[0072] Reference Figure 1 and Figure 3 A support plate 8 is fixed at the bottom of the support rod 4, and the connecting piece includes a plurality of connecting bolts 9 threadedly connected to the support plate 8. A horse stool 10 is arranged in the foundation pit, and a plurality of first threaded holes are opened on the horse stool 10. The first threaded holes correspond to the connecting bolts 9 and can be threadedly connected to the connecting bolts 9.

[0073] When installing the embedded section 1 in the foundation pit, a horse stool 10 is installed in the foundation pit in advance. After that, the embedded section 1 is placed in the foundation pit, the connecting bolt 9 is connected with the corresponding first threaded hole, and the connecting bolt 9 is rotated to screw the connecting bolt 9 into the first threaded hole, thereby fixing the support plate 8 on the horse stool 10, and then installing and fixing the embedded section 1 in the foundation pit; and in the process of rotating the connecting bolt 9 to connect the support rod 4, the embedded section 1 can also be aligned, and then the verticality of the embedded section 1 can be controlled.

[0074] Reference Figure 1 and Figure 3In the embodiment of the present application, air holes 11 are provided on the support plate 8, and the air holes 11 are used to improve the density of the concrete filled under the support plate 8.

[0075] Reference Figure 1 and Figure 6 The anchor 2 includes a mounting plate 12, which is fixed to the top of the support rod 4. A connecting plate 13 is vertically fixed on the mounting plate 12, and a pin hole 15 is opened on the connecting plate 13. Support plates 14 are attached to both sides of the connecting plate 13. The bottom of the supporting plate 14 is fixed to the connecting plate 13, and the top is used to abut against the tower crane; when the first connecting seat is connected to the corresponding tower crane, the bottom end of the tower crane is abutted against the supporting plate 14. At this time, the holes processed on the tower crane are connected with the pin holes 15 on the connecting plate 13, and the pin shaft is passed through the hole and the pin hole 15 at the same time, thereby completing the connection of the tower crane. The cooperation between the supporting plate 14 and the connecting plate 13 can improve the stability of the connection between the tower crane and the corresponding anchor.

[0076] Reference Figure 6 and Figure 7 The anchor 2 3 includes a second connecting seat 17, and a second connecting hole is opened on the second connecting seat 17. The second threaded hole is used for threaded connection with a bolt. When connecting with the corresponding tower crane through the second connecting seat 17, the threaded hole processed on the tower crane is connected with the second threaded hole, and the bolt is passed through the threaded hole on the tower crane and the second threaded hole at the same time, and the connection between the tower crane and the corresponding anchor is completed by threaded connection.

[0077] In the embodiment of the present application, in order to improve the overall strength of the common foundation, the top of the support rod 4 is connected to the mounting plate 12 by welding, the bottom is connected to the support plate 8 by welding, the two ends of the connecting rod 5 are connected to the two support rods 4 by welding, the second anchor 3 is welded and fixed to the connecting rod 5, and the second anchor 3, the connecting rod 5, the support rod 4 and the reinforcement rod 18 are also fixedly connected by welding.

[0078] In the embodiment of the present application, according to the structure of most tower cranes used at the construction site, the number of anchors 2 and anchors 3 is set to four, and the connecting lines between the four anchors 2 form a rectangular frame; in other embodiments, the number and specific structure of anchors 2 and anchors 3 can be adjusted for suitability of the tower cranes actually under construction.

[0079] In the embodiment of the present application, the structures of the foot 1 2 and the foot 2 3 are designed with reference to the QTZ615 tower crane and QTZ1800 tower crane required for construction. Figure 6 The standard section size of QTZ615 tower crane is 2300×2300×6000mm (length×width×height), which can be installed on the common foundation through anchor 23; refer to Figure 8The standard section size of QTZ1800 tower crane is 3200×3200×6000mm (length×width×height), which can be installed on a common foundation through anchor 1 2; in other embodiments, the specific structure of anchor 1 2 and anchor 2 3 can be designed according to the tower crane selected in the actual construction, and the structure of anchor 1 2 and anchor 2 3 can be the same or different; in other embodiments, the required pin holes 15 or threaded holes can be processed on the corresponding tower crane according to the structure of anchor 1 2 and anchor 2 3, so that the tower crane can establish a connection with the corresponding anchor.

[0080] In the embodiment of the present application, the common foundation is installed in the foundation pit. After the installation of the common foundation is completed, C35 concrete needs to be poured into the foundation pit, thereby burying the common foundation underground. At this time, anchor 1 2 and anchor 2 3 are exposed to the ground. After the common foundation is installed in the foundation pit, steel bars need to be provided on the common foundation according to factors such as the tower crane model and foundation conditions to improve the stability of the common foundation when it is located in the foundation pit.

[0081] The implementation principle of a common foundation that can be used for tower crane conversion in Example 2 of the present application is as follows: when the common foundation is used, the embedded section 1 is connected to the foundation pit by a connecting piece, thereby installing the embedded section 1 in the foundation pit, and then, concrete is poured into the foundation pit, thereby burying the embedded section 1 in the foundation pit. At this time, the anchor 1 2 and the anchor 2 3 at the bottom of the embedded section 1 are exposed to the ground and used to connect with the tower crane; after the concrete poured in the foundation pit solidifies and takes shape, the anchor 1 2 and the anchor 2 3 are fixed, and multiple anchors 2 are arranged around and located on the outside of multiple anchors 2 3. The anchor 1 2 can be used to connect to a heavy tower crane, and multiple anchors 2 3 can be used to connect to a light tower crane, thereby making the common foundation available for conversion of different tower cranes, which can simultaneously meet the installation of tower cranes of different specifications.

[0082] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A construction method for a common foundation for tower crane conversion, characterized in that: The following steps are involved: S1: Preliminary preparation: determine and analyze the specifications of the tower crane required at the construction site according to construction requirements; S2: prepare a common foundation, use the embedded section (1) of the heavy tower crane as the main load-bearing member, the embedded section (1) is provided with a first anchor (2) for connecting with the heavy tower crane, and a second anchor (3) for connecting with the light tower crane is installed on the embedded section (1); S3: Construction preparation, excavation of foundation pit, installation of horse stool (10) in the foundation pit; S4: Install the common foundation, connect the embedded section (1) with the horse stool (10), and expose the first foot (2) and the second foot (3) to the ground; S5: Fix the common foundation and pour concrete into the foundation pit; The second foot (3) is provided with a fixing rod (23), a plurality of reinforcing rods (18) are staggeredly arranged on the fixing rod (23), the plurality of reinforcing rods (18) are all fixedly connected to the embedded section (1), and the fixing rod (23) is fixedly connected to the embedded section (1); The plurality of second footings (3) are independently arranged, and the plurality of second footings (3) are arranged around the inner side of the plurality of first footings (2).

2. The construction method of a common foundation for tower crane conversion according to claim 1 is characterized in that: The bottom of the horse stool (10) is provided with a plurality of supporting legs (19), and one end of the plurality of supporting legs (19) away from the horse stool (10) has a horizontal bent section (20); in step S3, when installing the horse stool (10) in a foundation pit, the bent section (20) of the supporting leg (19) is fitted with the foundation pit, and the horizontality of the horse stool (10) is checked. After ensuring that the horse stool (10) is in a horizontal state, concrete is poured at the supporting leg (19) to form a cushion layer (21).

3. The construction method of a common foundation for tower crane conversion according to claim 2 is characterized in that: There is a space between the cushion layer (21) and the horse stool (10). After the concrete of the cushion layer (21) solidifies, the bottom layer of steel bars (22) connected to the supporting legs (19) are tied between the cushion layer (21) and the horse stool (10).

4. The construction method of a common foundation for tower crane conversion according to claim 1 is characterized in that: A first threaded hole is provided on the horse stool (10), and a connecting bolt (9) is threadedly connected to the embedded section (1); in step S4, when the embedded section (1) is connected to the horse stool (10), the connecting bolt (9) is docked with the first threaded hole, and the connecting bolt (9) is screwed into the first threaded hole to connect the embedded section (1) to the horse stool (10).

5. The construction method of a common foundation for tower crane conversion according to claim 1 is characterized in that: In step S4, after the embedded section (1) is connected to the horse stool (10), the surface layer steel bars (25) are tied around the embedded section (1).

6. A common foundation for tower crane conversion, applied to the construction method of a common foundation for tower crane conversion as claimed in any one of claims 1 to 5, characterized in that: It comprises a pre-buried section (1), on which a plurality of first ground feet (2) are arranged around the pre-buried section (1), and inside of the plurality of first ground feet (2) are a plurality of second ground feet (3) arranged around.

7. The common foundation for tower crane conversion according to claim 6, characterized in that: The embedded section (1) comprises a plurality of support rods (4), each of which is provided with a first anchor (2), the plurality of support rods (4) are arranged in a surrounding manner, a connecting rod (5) is provided between two adjacent support rods (4), each of which is provided with a second anchor (3), and a reinforcing rod (6) is also provided between two adjacent support rods (4).

8. The common foundation for tower crane conversion according to claim 7, characterized in that: A support plate (8) is provided at the bottom of the support rod (4), and a plurality of connecting bolts (9) are threadedly connected to the support plate (8).

9. The common foundation for tower crane conversion according to claim 7, characterized in that: The support rod (4) is provided with a plurality of bolts (7) along the length and width directions.

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