Tower crane foundation structure

Abstract

The utility model relates to the technical field of tower crane fixing, in particular to a tower crane foundation structure which comprises a foundation pit, a foundation cushion layer, a tower crane foundation, a water collecting well, retaining walls, a plurality of cross braces and a pedal, the cross braces are arranged between the retaining walls on the opposite sides for supporting, the outer side soil pressure borne by the retaining walls can be shared, and the stability of the retaining walls is improved. The wall body cracking, water seepage and collapse risks of the retaining wall are reduced, so that the tower crane is safer; the cross brace can serve as a supporting structure of the pedal, it is guaranteed that the pedal can be stably arranged above the space on the inner side of the retaining wall, the risk that personnel step missing and fall is avoided, a tower crane driver can reach the top from the bottom of the tower crane without entering a foundation pit, and the tower crane driver can directly reach the tower crane from the pedal; and a tower crane driver can get on and off the tower crane more conveniently and safely.

Description

Technical Field

[0001] This utility model relates to the field of tower crane fixing technology, and in particular to a tower crane foundation structure. Background Technology

[0002] Currently, in building construction projects, tower cranes are commonly used for material transportation during the main construction phase. During tower crane foundation construction, the bearing stratum is determined based on the preliminary geological survey report, and the foundation is fixed on this stratum. However, if the bearing stratum soil quality is poor or insufficient, or if the bearing stratum is too deep, it is necessary to excavate to a certain depth to utilize the bearing stratum for load-bearing capacity.

[0003] For example, Chinese patent application No. 202110061037.5 discloses a self-drainage structure and construction method for a tower crane foundation pier. The self-drainage structure includes a foundation layer, on which a tower crane foundation pier is mounted. A tower crane foundation section is installed on the foundation pier. A solid brick retaining wall is constructed around the foundation pier. A sump is built on one side of the retaining wall and connected to a drainage outlet. A drainage ditch is located on one side of the sump, containing a self-priming sewage pump connected to the drainage ditch via a pipe. This solution ensures the load-bearing capacity of the tower crane foundation base, but it still has some drawbacks:

[0004] (1) The masonry retaining wall is only 240mm thick. When the bearing layer is located in a deeper soil layer, the foundation pit needs to be excavated deeper and the height of the retaining wall needs to be increased. In order to have enough space to construct the retaining wall, the foundation pit needs to be widened. In order to avoid the cost from continuing to increase due to the excessive length of the retaining wall, a gap will be left between the foundation pit and the retaining wall. Soil needs to be backfilled between the retaining wall and the foundation pit after the construction of the retaining wall. When the backfill height is greater than 5m, the stability of the wall cannot be guaranteed, and there is a risk of wall cracking, water seepage, and collapse.

[0005] (2) The gap between the retaining wall and the tower crane poses a safety hazard, as it can easily cause people to fall into the gap when working around the device.

[0006] (3) The gap between the retaining wall and the tower crane: When the tower crane operator goes up and down the tower crane, he needs to go down to the tower crane foundation and then climb up to the tower crane operating room, which is cumbersome, poses a safety hazard and is inconvenient.

[0007] (4) There is no filtration system above the water collection well, which can easily cause debris to accumulate, damage the water pump, or make cleaning inconvenient. Utility Model Content

[0008] The purpose of this utility model is to overcome the shortcomings of existing tower crane foundations when the bearing layer of the tower crane's preset position is located in a deeper soil layer, such as the risk of wall cracking, water seepage and collapse of the retaining wall, the safety risk of the gap between the retaining wall and the tower crane, and the safety hazards and inconvenience for the tower crane operator when getting on and off the tower crane. This invention provides a tower crane foundation structure.

[0009] In a first aspect, this utility model provides a tower crane foundation structure, comprising:

[0010] The foundation pit, the bottom of which is located on the surface of the bearing layer;

[0011] A foundation cushion layer, which covers the bottom of the foundation pit and is located on the surface of the bearing layer;

[0012] A tower crane foundation is provided above the foundation pad, and a tower crane embedded part is pre-embedded in the tower crane foundation, with the top of the tower crane embedded part higher than the tower crane foundation.

[0013] A water collection well is located on the side of the tower crane foundation. The bottom of the water collection well has a water collection well foundation, which is set on the foundation pad. The top surface elevation of the water collection well foundation is lower than the top surface elevation of the tower crane foundation.

[0014] A retaining wall is provided in an enclosing shape around the embedded parts of the tower crane. The bottom of the retaining wall is located on the foundation of the tower crane, the foundation pad and / or the sump, and the top extends to the ground. When the bottom of the retaining wall is located on the foundation pad, a retaining wall foundation is provided at the bottom of the retaining wall, and the retaining wall foundation is located on the foundation pad.

[0015] Several horizontal braces, all of which are connected between the retaining walls on opposite sides, and the vertical projection of the horizontal braces is misaligned with the embedded parts of the tower crane;

[0016] Backfill soil, which fills the space between the retaining wall and the edge of the foundation pit;

[0017] The tread is mounted on the cross brace and covers the space inside the retaining wall. The vertical projection of the tread is offset from the tower crane embedded parts.

[0018] The tower crane foundation structure of this utility model covers the bottom of the foundation pit with a foundation pad, ensuring that water accumulation in the pit will not damage the foundation. The tower crane foundation is set above the foundation pad, which is located on the surface of the bearing layer. Embedded components for the tower crane are pre-installed within the tower crane foundation for connection, ensuring stable force transmission from the tower crane to the bearing layer and guaranteeing the stability and safety of the tower crane. A water collection well is provided on the side of the tower crane foundation, with the top surface elevation of the well foundation lower than the top surface elevation of the tower crane foundation. This allows water accumulation on the top surface of the tower crane foundation to flow into the water collection well, reducing the impact of water accumulation on the embedded components and the tower crane foundation. Retaining soil... The wall is used to prevent the backfill soil between the retaining wall and the edge of the foundation pit from impacting and squeezing the tower crane. By setting cross braces between the retaining walls on opposite sides for support, the external soil pressure borne by the retaining wall can be distributed, improving the stability of the retaining wall and thus reducing the risk of wall cracking, water seepage, and collapse. In addition, the cross braces can also serve as a support structure for the footboard, ensuring that the footboard can be stably installed above the space inside the retaining wall, avoiding the risk of personnel falling into the gap. Furthermore, it allows the tower crane operator to go directly from the footboard to the tower crane without having to enter the foundation pit to get from the bottom to the top, making it more convenient and safer for the tower crane operator to get on and off the tower crane.

[0019] Preferably, the cross bracing has at least two layers, each layer of cross bracing is arranged in a rectangular grid, and the tread is set on the top layer of cross bracing, which can improve the stability of the retaining wall and at the same time improve the stability of the tread support.

[0020] Preferably, the spacing between adjacent cross braces is 800mm-1200mm, which can improve the stability of the retaining wall and avoid construction complexity and cost waste caused by excessively dense bracing.

[0021] Preferably, the cross brace is a steel pipe, and the end of the cross brace is pressed against the inner side of the retaining wall by a support top. If the support top adopts a threaded telescopic structure, it can be adjusted in the length direction of the cross brace, providing stable support and convenient installation.

[0022] Preferably, the pedal is divided into several splicing plates, which are laid on the cross brace. The splicing plates can be removed to facilitate the installation of the pedal.

[0023] Preferably, the top of the retaining wall is 100mm-300mm higher than the ground to prevent ground water from entering the interior of the retaining wall from the side and to prevent water accumulation on the tower crane foundation from soaking the tower crane's embedded parts.

[0024] Preferably, a pump is installed in the water collection well, and the foundation elevation of the water collection well is not less than 500mm lower than the foundation elevation of the tower crane, so as to avoid the pump being unable to pump water when the water depth of the water collection well is shallow and rainwater will soak the embedded parts of the tower crane.

[0025] Preferably, the upper side wall of the water collection well is provided with a cantilever, and a filter well cover is supported on the cantilever. The filter well cover is lower than the surface of the tower crane foundation, which solves the problem that the lack of a filtration system above the water collection well can easily cause debris to accumulate, damage to the water pump, or inconvenience in cleaning.

[0026] Preferably, the bottom of the retaining wall near the foundation of the water collection well is set on the foundation of the water collection well, the retaining wall on the opposite side of the foundation of the water collection well with respect to the tower crane foundation is set on the retaining wall foundation, and the remaining retaining walls are set on the tower crane foundation. The water collection well is located between the tower crane foundation and the adjacent retaining wall.

[0027] This design allows for the widening of the enclosed space within the retaining wall, which is beneficial for tower crane construction. Furthermore, placing the sump between the tower crane foundation and the adjacent retaining wall allows the tower crane foundation and the adjacent retaining wall to serve as the sidewalls of the sump, simplifying its construction. Additionally, partially constructing the retaining wall on the foundations of the tower crane foundation and the sump allows for the direct use of these foundations as the retaining wall foundations, reducing the required height of the retaining wall and lowering costs.

[0028] Preferably, the sump foundation, tower crane foundation, retaining wall foundation, and retaining wall are all reinforced concrete components. The sump foundation, tower crane foundation, and retaining wall foundation all have pre-embedded steel bars corresponding to the retaining wall, which can better form a whole and make the retaining wall more stable.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0030] This utility model provides a tower crane foundation structure. By setting horizontal braces between the retaining walls on opposite sides for support, the external soil pressure borne by the retaining walls can be distributed, improving the stability of the retaining walls and thus reducing the risk of wall cracking, water seepage, and collapse, making the tower crane safer. In addition, the horizontal braces can also serve as a support structure for the footboard, ensuring that the footboard can be stably installed above the space inside the retaining wall, avoiding the risk of personnel falling into the gap. Furthermore, the tower crane operator does not need to enter the foundation pit to ascend from the bottom to the top of the tower crane, but can directly ascend from the footboard, making it more convenient and safer for the tower crane operator to get on and off the tower crane. Attached Figure Description

[0031] Figure 1 This is an elevation view of the tower crane foundation structure (without the tower crane installed).

[0032] Figure 2 A plan view of the tower crane foundation structure (for tower crane installation);

[0033] Figure 3 This is a schematic diagram after the foundation pad layer has been constructed;

[0034] Figure 4 This is a schematic diagram showing the foundations of the tower crane, retaining wall, and sump.

[0035] Figure 5 This is a schematic diagram showing the construction of the retaining wall.

[0036] Figure 6 This is a schematic diagram after the construction of the cross bracing.

[0037] The markings in the diagram are: 1. Foundation pad; 2. Tower crane foundation; 3. Sump; 31. Sump foundation; 32. Pump; 33. Cantilever; 34. Filter well cover; 4. Retaining wall; 41. Retaining wall foundation; 42. Horizontal brace; 421. Support top bracket; 5. Tower crane; 51. Tower crane embedded parts; 6. Step plate; 61. Splicing plate. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0039] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0040] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0041] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0042] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0043] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0044] Example 1

[0045] like Figures 1-6 As shown, a tower crane foundation 2 structure includes: a foundation pit, a foundation pad 1, a tower crane foundation 2, a sump 3, a retaining wall 4, several cross braces 42, and a treadle 6.

[0046] The bottom of the foundation pit is located on the surface of the bearing layer, which is not shown in the figure;

[0047] The foundation cushion layer 1 covers the bottom of the foundation pit and is located on the surface of the bearing layer; by covering the bottom of the foundation pit with the foundation cushion layer 1, it is ensured that the foundation will not be damaged by water accumulation in the foundation pit.

[0048] like Figure 1 As shown, the tower crane foundation 2 is set above the foundation pad 1. A tower crane embedded part 51 is pre-embedded in the tower crane foundation 2, and the top of the tower crane embedded part 51 is higher than the tower crane foundation 2. The tower crane foundation 2 is set above the foundation pad 1, which is located on the surface of the bearing layer. The tower crane embedded part 51 is pre-embedded in the tower crane foundation 2 for connecting the tower crane 5. This ensures that the force of the tower crane 5 is stably transmitted to the bearing layer, thus ensuring the stability and safety of the tower crane 5 in use.

[0049] like Figure 1 As shown, the water collection well 3 is located on the side of the tower crane foundation 2. The bottom of the water collection well 3 has a water collection well foundation 31. The water collection well foundation 31 is set on the foundation pad 1. The top surface elevation of the water collection well foundation 31 is lower than the top surface elevation of the tower crane foundation 2, so that the water accumulated on the top surface of the tower crane foundation 2 can flow into the water collection well 3, reducing the impact of water accumulation on the tower crane embedded parts 51 and the tower crane foundation 2.

[0050] In an optional embodiment, a pump 32 is installed in the water collection well 3, and the elevation of the water collection well foundation 31 is not less than 500mm lower than the elevation of the tower crane foundation 2, so as to avoid the pump 32 being unable to pump water when the water depth of the water collection well 3 is shallow and rainwater will soak the tower crane embedded parts 51.

[0051] Furthermore, the upper side wall of the water collection well 3 is provided with a cantilever 33, and a filter well cover 34 is supported on the cantilever 33. The filter well cover 34 is lower than the upper surface of the tower crane foundation 2, which solves the problem that the water collection well 3 has no filtration system above it, which easily causes debris to accumulate, the water pump 32 to be damaged, or cleaning to be inconvenient.

[0052] like Figure 5 As shown, the retaining wall 4 is arranged in an enclosing shape around the tower crane embedded part 51. The bottom of the retaining wall 4 is located on the tower crane foundation 2, the foundation pad 1 and / or the sump foundation 31, and the top extends to the ground. When the bottom of the retaining wall 4 is located on the foundation pad 1, a retaining wall foundation 41 is provided at the bottom of the retaining wall 4, and the retaining wall foundation 41 is located on the foundation pad 1. The retaining wall 4 is used to prevent the backfill soil between the retaining wall 4 and the edge of the pit from impacting and squeezing the tower crane 5.

[0053] In an optional embodiment, the top of the retaining wall 4 is 100mm-300mm higher than the ground to prevent ground water from entering the interior of the retaining wall 4 from the side and to prevent water accumulation in the tower crane foundation 2 from soaking the tower crane embedded parts 51.

[0054] like Figure 6 As shown, all the horizontal braces 42 are connected between the retaining walls 4 on the opposite sides. The vertical projection of the horizontal braces 42 is offset from the tower crane embedded parts 51 to avoid affecting the installation of the tower crane 5. By setting horizontal braces 42 between the retaining walls 4 on opposite sides for support, the external soil pressure borne by the retaining wall 4 can be shared, the stability of the retaining wall 4 can be improved, and the risk of wall cracking, water seepage and collapse of the retaining wall 4 can be reduced.

[0055] Backfill soil is filled between the retaining wall 4 and the edge of the foundation pit, not shown in the figure;

[0056] like Figure 2 and Figure 6 As shown, the step 6 is mounted on the cross brace 42 and covers the inner space of the retaining wall 4. The vertical projection of the step 6 is offset from the tower crane embedded part 51. The cross brace 42 serves as a support structure for the step 6, ensuring that the step 6 can be stably mounted above the inner space of the retaining wall 4, avoiding the risk of personnel falling into the gap. Furthermore, it allows the tower crane operator to access the tower crane 5 directly from the step 6 without having to enter the pit, making it more convenient and safer for the operator to ascend and descend the tower crane 5.

[0057] In an optional embodiment, the pedal 6 is divided into several splicing plates 61, which are laid on the cross brace 42. The splicing plates 61 can be removed to facilitate the installation of the pedal 6.

[0058] In an optional embodiment, the cross brace 42 is provided with at least two layers, such as... Figure 1 As shown, the cross brace 42 is configured in three layers. Figure 1 and Figure 2 As shown, each layer of the horizontal bracing 42 is arranged in a rectangular grid, and the tread plate 6 is set on the top layer of the horizontal bracing 42, which can improve the stability of the retaining wall 4 and at the same time improve the stability of the support for the tread plate 6.

[0059] Furthermore, the spacing between adjacent cross braces 42 is 800mm-1200mm, which can improve the stability of the retaining wall 4 and avoid the construction complexity and cost waste caused by excessively dense installation.

[0060] Furthermore, the cross brace 42 is a steel pipe, and the end of the cross brace 42 is pressed against the inner side of the retaining wall 4 by a support top 421. If the support top 421 adopts a threaded telescopic structure, it can be adjusted in the length direction of the cross brace 42, providing stable support and convenient installation.

[0061] In optional implementations, such as Figure 1 As shown, the retaining wall 4 ( ) is located near the foundation 31 of the water collection well. Figure 1 The bottom of the retaining wall 4 on the right side is set on the water collection well foundation 31. The retaining wall 4 (on the opposite side of the water collection well foundation 31 with respect to the tower crane foundation 2) Figure 1 The retaining wall 4 on the left side is set on the retaining wall foundation 41, which can widen the enclosed space of the retaining wall 4, which is beneficial to the construction of the tower crane 5. The other retaining walls 4 are set on the tower crane foundation 2, and the tower crane foundation 2 and the sump foundation 31 can be directly used as the retaining wall foundation 41, eliminating the need to construct a separate retaining wall foundation 41, reducing the setting height of the corresponding retaining wall 4, and lowering costs. The sump 3 is located between the tower crane foundation 2 and the adjacent retaining wall 4, and setting the sump 3 between the tower crane foundation 2 and the adjacent retaining wall 4 can utilize the tower crane foundation 2 and the adjacent retaining wall 4 as the sidewall of the sump 3, making the construction of the sump 3 simpler.

[0062] In this embodiment, the water collection well foundation 31, tower crane foundation 2, retaining wall foundation 41 and retaining wall 4 are all reinforced concrete components. The water collection well foundation 31, tower crane foundation 2 and retaining wall foundation 41 are all pre-embedded with steel bars corresponding to the retaining wall 4, which can better form a whole and make the retaining wall 4 more stable.

[0063] The construction method of the tower crane foundation 2 in this embodiment is as follows:

[0064] S1. After excavation to the bearing stratum, a foundation pit is formed. The pit is then supported using conventional methods for both support and construction. The shape of the excavated pit is adapted to the enclosure shape of the retaining wall. Foundation cushion layer 1 is constructed within the pit, as follows: Figure 3 As shown, the foundation pad 1 covers the bottom of the foundation pit, ensuring that rainwater will not damage the foundation even if it accumulates in the pit, and can effectively control the thickness of the steel reinforcement protective layer of the sump foundation 31, tower crane foundation 2 and retaining wall foundation 41.

[0065] S2, such as Figure 4As shown, the tower crane foundation 2, sump foundation 31, and retaining wall foundation 41 are constructed on the foundation pad 1. The elevation of the sump foundation 31 is at least 500mm lower than that of the tower crane foundation 2. This is mainly to accommodate a pump 32 inside the sump, reducing the risk that the pump 32 will be unable to pump water when the water depth in the sump is shallow, and that rainwater will flood the tower crane embedded parts 51. Embedded steel bars are installed in the sump foundation 31 and the retaining wall foundation 41 corresponding to the retaining wall 4. The tower crane embedded parts 51 are embedded in the tower crane foundation 2, and the corresponding steel bars of the retaining wall 4 are also embedded in the tower crane foundation 2, allowing the retaining wall 4 to better connect with the tower crane foundation 2 as a whole. A cantilever 33 is installed above the sump 3, such as... Figure 1 As shown, the cantilever lug 33 is located on the side of the tower crane foundation 2 near the water collection well 3. The cantilever lug 33 can be a reinforced concrete structure or a stainless steel structure, etc.

[0066] S3, such as Figure 5 As shown, a retaining wall 4 is constructed on top of the tower crane foundation 2, the sump foundation 31, and the retaining wall foundation 41. The height of the retaining wall 4 is from the top surface of the tower crane foundation 2, the sump foundation 31, and the retaining wall foundation 41 to the ground, generally 100mm-300mm above the ground, to prevent rainwater from flowing into the inside of the tower crane foundation 2 when the ground is flooded. When constructing the retaining wall 4 near the sump 3, the cantilever 33 on the inner side of the retaining wall 4 is constructed corresponding to the cantilever 33 on the side of the tower crane foundation 2. After the retaining wall 4 is constructed, a space for the sump 3 is formed between the tower crane foundation 2 and the retaining wall 4. A water pump 32 is installed in the sump 3, and then a filter well cover 34 is installed on the cantilever 33 constructed earlier. The cantilever 33 supports the filter well cover 34. The filter well cover 34 installed above the sump 3 solves the problem that the lack of a filtration system above the sump 3 easily leads to the accumulation of debris, which can damage the water pump 32 or make cleaning inconvenient.

[0067] S4, such as Figure 6 As shown, after construction is completed, the tower crane 5 is installed on the foundation of the tower crane embedded part 51. The tower crane embedded part 51 can be better connected with the tower crane foundation 2 to form a whole. Then, 48*3mm steel pipes are used as cross braces 42 and installed from bottom to top. The spacing of the 48*3mm steel pipes is 1000*1000mm. The ends of the 48*3mm steel pipes are tightened and fixed with support top brackets 421. This can avoid the safety problem of the retaining wall 4 cracking, seeping water or collapsing due to excessive soil lateral pressure during backfilling after construction.

[0068] S5, such as Figure 1 and Figure 2 As shown, Figure 1To illustrate the tower crane, a platform 6 is installed on the upper end of a 48*3mm steel pipe and retaining wall 4. Platform 6 is a rigid horizontal protective structure capable of withstanding the load of people walking on it. Furthermore, platform 6 is composed of several interlocking plates 61, making installation easier. This platform 6 serves as horizontal protection, reducing the entry of rainwater or debris into the foundation pit and preventing construction workers from falling in. It also serves as a passageway for the tower crane operator to ascend and descend, solving the problem of the cumbersome, unsafe, and inconvenient process of climbing from the tower crane foundation 2 to the tower crane operator's room.

[0069] S6. Finally, backfill soil on the outside of retaining wall 4. The backfill soil on the outside can settle naturally without the need for layered compaction. This part of the soil is not under stress, which saves the construction time and cost of layered compaction.

[0070] The tower crane foundation 2 structure described in this embodiment can adopt a process method that saves materials and other resources. The tower crane foundation 2 structure is solid and stable, which solves the problems of large safety hazards, long construction period and high construction cost of the existing technology, and greatly improves the safety of the tower crane foundation 2.

[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tower foundation construction, characterized in that, include: The foundation pit, the bottom of which is located on the surface of the bearing layer; A foundation cushion layer, which covers the bottom of the foundation pit and is located on the surface of the bearing layer; A tower crane foundation is provided above the foundation pad layer. An embedded tower crane component is pre-embedded in the tower crane foundation, and the top of the embedded tower crane component is higher than the tower crane foundation. A water collection well is located on the side of the tower crane foundation. The bottom of the water collection well has a water collection well foundation, which is set on the foundation pad. The top surface elevation of the water collection well foundation is lower than the top surface elevation of the tower crane foundation. A retaining wall is provided in an enclosing shape around the embedded parts of the tower crane. The bottom of the retaining wall is located on the foundation of the tower crane, the foundation pad and / or the sump, and the top extends to the ground. When the bottom of the retaining wall is located on the foundation pad, the bottom of the retaining wall is provided with a retaining wall foundation, and the retaining wall foundation is located on the foundation pad; Several horizontal braces, all of which are connected between the retaining walls on opposite sides, and the vertical projection of the horizontal braces is misaligned with the embedded parts of the tower crane; Backfill soil, which fills the space between the retaining wall and the edge of the foundation pit; The tread is mounted on the cross brace and covers the space inside the retaining wall. The vertical projection of the tread is offset from the tower crane embedded parts.

2. A tower foundation construction according to claim 1, characterized in that In the vertical direction, the cross bracing is provided in at least two layers, and each layer of cross bracing is arranged in a rectangular grid. The tread is provided on the top layer of cross bracing.

3. A tower foundation construction according to claim 2, characterized in that The spacing between adjacent cross braces is 800mm-1200mm.

4. A tower foundation construction according to claim 1, characterized in that The cross brace is a steel pipe, and the end of the cross brace is pressed tightly against the inner side of the retaining wall by a support top.

5. A tower foundation construction according to claim 1, characterized in that The pedal is divided into several splicing panels, which are laid on the cross brace and can be removed.

6. A tower foundation construction according to claim 1, characterized in that The top of the retaining wall is 100mm-300mm higher than the ground.

7. A construction of a tower foundation according to any one of claims 1 - 6, characterized in that The water collection well is equipped with a water pump, and the foundation elevation of the water collection well is at least 500mm lower than the foundation elevation of the tower crane.

8. A tower foundation construction according to claim 7, characterized in that The upper side wall of the water collection well is provided with a cantilever, and a filter well cover is supported on the cantilever. The filter well cover is lower than the surface of the tower crane foundation.

9. A construction of a tower foundation according to any one of claims 1-6, characterized in that, The bottom of the retaining wall near the foundation of the sump is set on the foundation of the sump, the retaining wall on the opposite side of the foundation of the sump about the tower crane foundation is set on the retaining wall foundation, and the remaining retaining walls are set on the tower crane foundation. The sump is located between the tower crane foundation and the adjacent retaining wall.

10. A tower foundation construction according to claim 9, characterized in that The foundations of the sump, tower crane, retaining wall, and retaining wall are all reinforced concrete components, and the foundations of the sump, tower crane, and retaining wall all contain pre-embedded reinforcing bars corresponding to the retaining wall.

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