CN219364689U

CN219364689U - Pile column type tower crane foundation suitable for weak geological conditions

Info

Publication number: CN219364689U
Application number: CN202320289678.0U
Authority: CN
Inventors: 陈善彬; 王德明; 王俊; 周贵琪; 黄永; 王康熙
Original assignee: Road and Bridge International Co Ltd; Road and Bridge East China Engineering Co Ltd
Current assignee: Road and Bridge International Co Ltd; Road and Bridge East China Engineering Co Ltd
Priority date: 2023-02-12
Filing date: 2023-02-12
Publication date: 2023-07-18
Anticipated expiration: 2033-02-12

Abstract

The utility model relates to a pile column type tower crane foundation suitable for weak geological conditions, which comprises 4 concrete filling piles arranged according to 4 vertexes of a square, wherein the upper ends of the 4 piles are flush with the ground, a cross-shaped spandrel girder is arranged between the upper ends of the 4 piles, the bottom surfaces of the 4 ends of the cross-shaped spandrel girder are respectively supported at the upper ends of the 4 piles, and the top surfaces of each end of the cross-shaped spandrel girder are respectively provided with an anchor girder; 4 anchor rods are vertically embedded at the upper end of each pile, the upper ends of the 4 anchor rods penetrate through the spandrel girder and the anchoring girder, the top surface of the anchoring girder is in threaded connection with an anchoring nut, and the cross spandrel girder is provided with 4 bases for symmetrically anchoring the tower crane by taking a cross center as a symmetry. The utility model has small occupied area, strong bearing capacity and convenient later dismantling.

Description

Pile column type tower crane foundation suitable for weak geological conditions

Technical Field

The utility model belongs to the technical field of bridge construction, relates to an installation foundation of a tower crane used for bridge construction, and particularly relates to a pile type tower crane foundation applicable to weak geological conditions.

Background

Bridge construction sites typically employ tower cranes as hoisting equipment for large-scale components. The tower crane needs to be supported on a solid foundation, and the tower crane foundation needs to meet a certain vertical bearing capacity and has enough shearing resistance. The common tower crane foundation is generally a concrete foundation, but under the weak geological condition, the common concrete foundation can not meet the requirement of the bearing capacity of the tower crane, if the foundation is enlarged by adopting concrete, the construction cost is higher, the workload of breaking concrete is larger in the later-stage land reclamation, and a large amount of concrete waste is caused; another commonly used tower crane foundation is a steel pipe pile foundation, a plurality of steel pipe piles are inserted and driven to an underground bearing layer, a bearing beam is erected on the steel pipe piles to install a tower crane, the steel pipe pile foundation is suitable for weak geological conditions, but under the condition that the steel pipe piles are not required to be inserted and driven in other working procedures of engineering, piling equipment is independently put into the construction tower crane foundation, and the construction cost is relatively high.

Disclosure of Invention

The utility model aims to solve the problems and provide a pile type tower crane foundation suitable for weak geological conditions, and the construction cost of the tower crane foundation is reduced on the premise of meeting the bearing capacity requirement of the tower crane.

The technical scheme of the utility model is as follows:

the utility model provides a stake formula tower crane foundation suitable for under weak geological conditions which characterized in that: the pile comprises 4 piles which are arranged according to 4 vertexes of a square, wherein the piles are concrete filling piles, a reinforcement cage is arranged in concrete of each pile, the upper ends of the 4 piles are flush with the ground, a cross-shaped spandrel girder is arranged between the upper ends of the 4 piles, the bottom surfaces of the 4 ends of the cross-shaped spandrel girders are respectively supported at the upper ends of the 4 piles, and the top surfaces of each end of the cross-shaped spandrel girders are respectively provided with an anchor girder; 4 anchor rods are vertically embedded at the upper end of each pile, the upper ends of the 4 anchor rods penetrate through the spandrel girder and the anchoring girder on the spandrel girder, and an anchoring nut is screwed on the top surface of the anchoring girder; and 4 bases of the tower crane are symmetrically anchored on the cross-shaped spandrel girder by taking the center of the cross.

The utility model adopts the concrete filling pile as the tower crane foundation, and the concrete filling pile has strong bearing capacity, and can meet the vertical load and shearing requirements of the tower crane under the weak geological condition. Compared with a concrete expansion foundation, the utility model has small occupied area and small post-land reclamation engineering quantity; compared with a steel pipe pile foundation, the utility model can directly adopt pile foundation construction equipment of a bridge construction site for construction without adding pile driving equipment, thereby saving equipment cost.

Drawings

FIG. 1 is a schematic elevational view of the present utility model;

FIG. 2 is a schematic plan view of the present utility model;

fig. 3 is a schematic side view of the anchor rods embedded in each pile.

Detailed Description

As shown in fig. 1 and 2, the utility model comprises 4 piles 1 arranged according to 4 vertexes of a square, wherein the piles are concrete filling piles, a reinforcement cage is arranged in the concrete of the piles, the upper ends of the 4 piles are flush with the ground, a cross-shaped spandrel girder 2 is arranged between the upper ends of the 4 piles, the bottom surfaces of the 4 ends of the cross-shaped spandrel girder 2 are respectively supported at the upper ends of the 4 piles 1, and the top surfaces of each end of the cross-shaped spandrel girder are respectively provided with an anchor girder 3; 4 anchor rods 4 are vertically embedded at the upper end of each pile 1, the upper ends of the 4 anchor rods 4 penetrate through the spandrel girder and the anchoring girder on the spandrel girder, and an anchoring nut 5 is screwed on the top surface of the anchoring girder; and 4 bases 6 of the tower crane are symmetrically anchored on the cross-shaped spandrel girder by taking the cross-shaped center.

As shown in fig. 2, in the implementation of the present utility model, the cross-shaped spandrel girder 2 may be formed by welding a full-length spandrel girder 21 and two spandrel girder segments 22, wherein the two spandrel girder segments 22 are perpendicular to the full-length spandrel girder 21, and one ends of the two spandrel girder segments are respectively welded to two sides of the middle of the full-length spandrel girder, and the top surfaces of the full-length spandrel girder and the two spandrel girder segments are flush.

In the concrete implementation of the utility model, in order to further prevent the displacement of the spandrel girder and improve the shear capacity of the spandrel girder, two limit posts 7 can be arranged at the upper end of each pile on two sides of the spandrel girder, the lower ends of the two limit posts 7 are embedded in pile concrete, and the upper ends of the two limit posts are clung to the two sides of the spandrel girder.

As shown in fig. 3, in the concrete implementation of the present utility model, in order to enable accurate positioning during installation of the anchor rods, the upper ends of the anchor rods can be ensured to smoothly pass through preset through holes on the spandrel girder and the anchor girder, at least two positioning plates 8 can be arranged on 4 anchor rods 4 pre-buried in each pile in a penetrating manner, and the lower ends of the positioning plates 8 and each anchor rod 4 are welded with a reinforcement cage of the pile.

In the concrete implementation of the utility model, in order to facilitate pile drilling construction and save post pile top breaking procedures, a steel pile casing 9 with a certain length can be arranged at the upper end of each pile 1, the upper end of the steel pile casing is flush with the upper end of the pile, and the steel pile casing 9 and concrete of the pile 1 are poured into a whole.

The specific embodiments of the present utility model are as follows:

and (3) pile construction: 4 pile positions are lofted out on the ground, and a bridge pile foundation construction drill is adopted for drilling construction; in order to facilitate pile drilling construction, a steel pile casing can be buried at each pile position, the length of the steel pile casing is about 3m, the upper end of the steel pile casing is flush with the ground, and a drilling machine drills holes downwards in the steel pile casings; the depth of the pile hole is below the hard stratum and meets the design bearing capacity requirement of the pile; after drilling, a reinforcement cage is lowered, 4 anchor rods are installed in the reinforcement cage, positioning plates are arranged on the 4 anchor rods in a penetrating mode, the anchor rods are adjusted to be perpendicular to the horizontal plane, the positioning plates and the anchor rods are welded with the reinforcement cage, so that the anchor rods are prevented from displacement when concrete is poured by the anchor rods, and the upper ends of the anchor rods protrude to a certain length above pile tops; two limit posts are welded at the upper end of the reinforcement cage, and 4 anchor rods are positioned between the two limit posts; pouring concrete into the pile hole until the concrete is flush with the upper end of the steel pile casing;

and (3) mounting a spandrel girder: welding and processing a cross-shaped spandrel girder in advance; the full length spandrel girder of the cross spandrel girder and the two spandrel girder sections adopt double-spliced or multi-spliced I-steel, and the width of the double-spliced or multi-spliced I-steel is equal to the distance between two limit posts on the pile; the 4 ends of the cross-shaped spandrel girder are respectively placed between two limit posts on the 4 posts and are penetrated on anchor rods at the upper ends of the 4 posts, an anchoring beam is respectively installed on the top surface of the 4 ends of the spandrel girder, the anchoring beam is also penetrated on the anchor rods, and the anchoring beam and the spandrel girder are tightly pressed on the upper ends of the posts by screw nuts at the upper ends of the anchor rods;

and installing a tower crane base on the cross-shaped spandrel girder and anchoring the tower crane base by bolts to finish the construction of the tower crane foundation.

After bridge construction is completed, when the tower crane foundation is broken, excavating to a position below the steel pile casing, circumferentially cutting the pile, and integrally hoisting the spandrel girder and the steel pile casing by using a crane.

Claims

1. The utility model provides a stake formula tower crane foundation suitable for under weak geological conditions which characterized in that: the pile comprises 4 piles which are arranged according to 4 vertexes of a square, wherein the piles are concrete filling piles, a reinforcement cage is arranged in concrete of each pile, the upper ends of the 4 piles are flush with the ground, a cross-shaped spandrel girder is arranged between the upper ends of the 4 piles, the bottom surfaces of the 4 ends of the cross-shaped spandrel girders are respectively supported at the upper ends of the 4 piles, and the top surfaces of each end of the cross-shaped spandrel girders are respectively provided with an anchor girder; 4 anchor rods are vertically embedded at the upper end of each pile, the upper ends of the 4 anchor rods penetrate through the spandrel girder and the anchoring girder on the spandrel girder, and an anchoring nut is screwed on the top surface of the anchoring girder; and 4 bases of the tower crane are symmetrically anchored on the cross-shaped spandrel girder by taking the center of the cross.

2. The pile-type tower crane foundation according to claim 1, suitable for use in weak geological conditions, wherein: the cross spandrel girder comprises a full-length spandrel girder and two spandrel girder sections, wherein the two spandrel girder sections are perpendicular to the full-length spandrel girder, one ends of the two spandrel girder sections are welded on two sides of the middle of the full-length spandrel girder respectively, and the top surfaces of the full-length spandrel girder and the two spandrel girder sections are flush.

3. The pile-type tower crane foundation according to claim 1, suitable for use in weak geological conditions, wherein: two limit posts are arranged at the two sides of the spandrel girder at the upper end of each pile, the lower ends of the two limit posts are embedded in pile concrete, and the upper ends of the two limit posts are clung to the two sides of the spandrel girder.

4. The pile-type tower crane foundation according to claim 1, suitable for use in weak geological conditions, wherein: at least two locating plates are arranged on 4 anchor rods embedded in each pile in a penetrating mode, and the lower ends of the locating plates and the anchor rods are welded with a reinforcement cage of the pile.

5. The pile-type tower crane foundation according to claim 1, suitable for use in weak geological conditions, wherein: and a steel pile casing with a certain length is sleeved at the upper end of each pile, the upper end of the steel pile casing is flush with the upper end of each pile, and the steel pile casing and the pile are concreted into a whole.