Tower crane engineering pile foundation

Abstract

The utility model relates to a tower crane engineering pile foundation, it includes: cross beam, bearing platform, its fixed setting is in the end and the middle part of cross beam, the bearing platform of middle part is used to install tower crane, cushion, its pad is in cross beam and bearing platform bottom surface, engineering pile, its fixed bearing platform bottom, rib beam grid, its layout is on the cushion, fixes cross beam and bearing platform, the utility model has enlarged the bottom area, is applicable to soft soil foundation, moreover has avoided the large -volume concrete pouring, has lightened the weight.

Description

Technical Field

[0001] This utility model relates to the field of tower crane foundations, and in particular to a tower crane engineering pile foundation. Background Technology

[0002] For example, Chinese Utility Model Announcement No. CN 207330189 U discloses a steel platform for tower cranes based on pipe pile foundations, relating to the technical field of tower crane steel platforms. It includes hollow pipe piles, a foundation section, and a steel frame. The hollow pipe piles are located within the ground, the foundation section is located inside the hollow pipe piles, and the steel frame is fixed to the foundation section. The foundation section includes columns and crossbars. The crossbars are located on the outer wall of the columns and are perpendicular to the axis of the columns. A cavity is provided inside the hollow pipe pile for the columns to pass through. The side wall of the cavity has a groove for positioning the crossbars. The columns slide within the cavity, and the crossbars slide within the grooves. However, this design is not suitable for overcoming the challenges of soft soil foundations, as the foundation base area is small, leading to rapid settlement and uneven settlement that can cause overturning. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a tower crane engineering pile foundation that has an enlarged bottom area, is suitable for soft soil foundations, and avoids large-volume concrete pouring, thus reducing weight.

[0004] To solve the above problems, a tower crane engineering pile foundation was adopted, which includes: Cross beam; The support platform is fixedly installed at the ends and middle of the cross beam, with the middle support platform used to install the tower crane; The subbase is placed on the bottom surface of the cross beam and the foundation. Engineering piles, which are fixed to the bottom of the pile cap; The ribbed grid, laid on the subbase, fixes the cross beams and the foundation.

[0005] With this structure, the cross beams connect the various foundations, avoiding the pouring of large volumes of concrete. The rib beam grid helps improve the overall integrity, helps adapt to soft soil foundations, and avoids rapid and uneven settlement.

[0006] As a further improvement of this utility model, the support platform is stepped, having an upper step and a lower step, the lower step being wider than the upper step; a semi-circular counterweight surrounds the upper step.

[0007] With this structure, the steps help to expand the tower crane column base and install counterweights. Adjusting the counterweights on each platform helps to coordinate the overall balance. Depending on the complex foundation conditions, the slower-settling parts need to have additional counterweights to ensure that the overall settlement rate remains consistent.

[0008] As a further improvement of this utility model, splicing plates are pre-embedded at both ends of the counterweight, and Z-shaped steel bars are welded to the back of the splicing plates. The Z-shaped steel bars are pre-embedded in the counterweight. The splicing plates extend out of the counterweight along the horizontal extension direction of the counterweight end face, and bolt holes are provided in the extended part. Two adjacent splicing plates are fixed together by bolt and nut assemblies.

[0009] With this structure, the counterweight can be fixed to prevent movement, and the Z-shaped steel bars make the spliced ​​panels more stable.

[0010] As a further improvement of this utility model, a concave annular groove is provided on the lower side of the counterweight, and a convex annular strip is provided on the upper side of the counterweight, wherein the concave annular groove is adapted to the convex annular strip.

[0011] With this structure, the counterweights can be stacked one on top of the other.

[0012] As a further improvement of this utility model, a lifting lug is pre-embedded on the side of the counterweight.

[0013] With this structure, the lifting lugs facilitate the transfer of counterweights.

[0014] This invention increases the base area, making it suitable for soft soil foundations, and avoids large-volume concrete pouring, thus reducing weight. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment.

[0016] Figure 2 This is a structural schematic diagram of the pile foundation of a pier cap project.

[0017] Figure 3 This is a structural diagram of the splicing panel.

[0018] Attached reference numerals: 1. Cross beam; 2. Foundation; 201. Upper step; 202. Lower step; 3. Subbase; 4. Engineering pile; 5. Rib grid; 6. Counterweight; 601. Splice plate; 602. Z-shaped reinforcement; 603. Concave annular groove; 604. Convex annular bar; 7. Bolt and nut assembly; 8. Lifting lug. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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 utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example 1 like Figures 1-3 As shown, cross beam 1, in this embodiment, cross beam 1 adopts a reinforced concrete structure with a concrete grade of not less than C35 to adapt to the deformation characteristics of soft soil foundation. 20C25 / 22C25 steel bars are respectively configured as main reinforcing bars at the top and bottom of the beam. C represents grade III steel bars. Double-layer parallel steel bar arrangement is adopted to ensure the strength and stability of the structure. The main reinforcement is anchored into the pile cap not less than laE (representing the minimum seismic anchorage length of the longitudinal tensile reinforcement) and extends beyond the pile centerline. The stirrups are C10@200 (6). Structural longitudinal reinforcement is set at intervals not greater than 200mm in the web of the beam. The web hooks C8@400 are arranged in a quincunx pattern to further improve the crack resistance and durability of the foundation.

[0022] The foundation 2 is located at the end and middle of the cross beam 1. It is stepped and has an upper step 201 and a lower step 202, with the lower step 202 being wider than the upper step 201. The cushion layer 3 is placed on the bottom surface of the cross beam 1 and the foundation 2; Engineering pile 4 is fixed to the bottom of pile cap 2; The counterweight 6 is a reinforced concrete structure in a semi-circular shape, encircling the upper step 201 and installed in pairs on the lower step 202. Splicing plates 601 are pre-embedded at both ends of the counterweight 6. Z-shaped reinforcing bars 602 are welded to the back of the splicing plates 601 and are pre-embedded in the counterweight 6. The splicing plates 601 extend horizontally from the end face of the counterweight 6 and have bolt holes 602 passing through the extended portion. Adjacent splicing plates 601 are spliced ​​together by bolt and nut assemblies 7. The counterweight 6 has a concave annular groove 603 on its lower side and a convex annular strip 604 on its upper side; the concave annular groove 603 and the convex annular strip 604 are adapted to each other; The counterweight 6 has a lifting lug 8 pre-embedded on its side; Rib grid 5 is provided on the pad 3; the rib grid 5 fixes the foundation 2 and the cross beam 1.

[0023] This embodiment has the following advantages. Advantages in construction period: Compared to traditional large-volume concrete foundation construction methods, this method significantly reduces the structural volume by splicing the foundation cap and cross beams, shortening the construction period for processes such as formwork and rebar tying. Furthermore, since no additional piling is required, substantial time is saved. This advantage is particularly pronounced in soft soil areas, as traditional methods often require complex foundation treatment.

[0024] Economic advantages: Compared to traditional large-volume concrete foundation construction methods, this process reduces the volume of the foundation structure, saving significant costs in terms of labor and materials. Especially in soft soil areas, the reduced need for foundation treatment further lowers project costs.

[0025] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several equivalent substitutions or obvious modifications can be made without departing from the concept of the present invention, and all such modifications, with identical performance or use, should be considered within the protection scope of the present invention.

Claims

1. A tower crane engineering pile foundation, characterized in that... include: Cross beam (1); The pier (2) is fixedly installed at the ends and middle of the cross beam, and the pier (2) in the middle is used to install the tower crane; The cushion layer (3) is placed on the bottom surface of the cross beam (1) and the foundation (2); Engineering pile (4), which is fixed to the bottom of the pile cap (2); Rib grid (5), which is laid on the pad (3), fixes the cross beam (1) and the foundation (2).

2. The tower crane pile foundation according to claim 1, characterized in that... The platform (2) is stepped, with an upper step (201) and a lower step (202), the lower step (202) being wider than the upper step (201); a semi-circular counterweight (6) surrounds the upper step (201).

3. The tower crane pile foundation according to claim 2, characterized in that... The counterweight (6) has pre-embedded splice plates (601) at both ends. The back of the splice plate (601) is welded with a Z-shaped steel bar (602). The Z-shaped steel bar (602) is pre-embedded in the counterweight (6). The splice plate (601) extends out of the counterweight (6) along the horizontal extension direction of the end face of the counterweight (6), and bolt holes are provided in the extended part. Two adjacent splice plates (601) are fixed together by bolt and nut assembly (7).

4. The tower crane pile foundation according to claim 3, characterized in that... The counterweight (6) has a concave annular groove (603) on its lower side and a convex annular strip (604) on its upper side. The concave annular groove (603) and the convex annular strip (604) are adapted to each other.

5. The tower crane pile foundation according to claim 4, characterized in that... The counterweight (6) has a pre-embedded lug (8) on its side.

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