Reinforced concrete foundation of engineering tower crane and foundation template

Abstract

The utility model provides a reinforced concrete foundation of an engineering tower crane. The reinforced concrete foundation comprises a concrete foundation and a reinforcing steel bar assembly arranged in the concrete foundation, the concrete foundation is circular, and the distance from the center point of the concrete foundation to any point on the circumference of the concrete foundation is the radius of the circle, so that the anti-overturning moments of the concrete foundation in any direction are the same. The utility model further discloses a foundation formwork which comprises a steel formwork assembly arranged outside the reinforced concrete foundation. According to the utility model, under the condition of the same concrete dosage (the volume of the foundation is not changed), the height of the foundation (punching checking calculation is not considered) is not considered, the base area of the foundation is not changed (bearing capacity checking calculation is not considered), the geometrical shape of the foundation is changed from a rectangle to a circle, and the area of the circle is equal to that of the rectangle; and the distance from the center point of the foundation to any point on the circumference is the radius of the circle, so that the anti-overturning moments of the foundation in any direction are the same.

Description

TECHNICAL FIELD

[0001] The utility model relates to a reinforced concrete foundation technical field, concretely relates to a kind of engineering tower crane reinforced concrete foundation and foundation formwork. BACKGROUND

[0002] The existing design scheme of the reinforced concrete foundation of tower crane is all equilateral rectangle (such as Figure 1 Indicated), and the foundation resists overturning moment M of crane by self weight and the moment from the center point to the edge of the foundation. The rectangular foundation has different angles on the horizontal plane, and the length of the side is L. The distance from the center of the rectangle to the corner point is the longest (see Figure 2 Line segment / 2), and the distance from the center point of the rectangle to the perpendicular line of the edge of the rectangle is the shortest (see Figure 2 Line segment L / 2). The working arm of the tower crane reciprocates on the horizontal plane according to the demand during work, and only coincides with the diagonal line of the foundation or the perpendicular line of the edge at a specific point in time. When the working arm coincides with the diagonal line of the foundation, the anti-overturning moment of the foundation is the largest, and when the working arm coincides with the perpendicular line of the edge, the anti-overturning moment of the foundation is the smallest. When the working arm is at other angles, the anti-overturning moment of the foundation is between the maximum value and the minimum value and is not a fixed value. SUMMARY

[0003] The utility model provides a kind of engineering tower crane reinforced concrete foundation and foundation formwork, solve the anti-overturning moment useless redundancy when working arm is at other arbitrary angles in prior art, save cost, save construction period.

[0004] The technical scheme of the utility model is realized as follows:

[0005] A kind of engineering tower crane reinforced concrete foundation, including concrete foundation and the steel bar arranged in concrete foundation;The concrete foundation is circular, and the distance from the center point of the concrete foundation to any point on the circumference of the concrete foundation is the radius of the circle, so that the anti-overturning moment of the concrete foundation in any direction is the same.

[0006] Further, the steel bar includes a plurality of stress steel bars, construction steel bars and distribution steel bars arranged above the stress steel bars and the construction steel bars respectively;

[0007] The stress steel bars and the construction steel bars are respectively located at the bottom and the top of the concrete foundation, and are arranged radially towards the circumference of the concrete foundation with the center of the concrete foundation as the center. The stress steel bars are calculated according to different models of tower crane, and the construction steel bars are set according to the minimum reinforcement ratio.

[0008] The distribution steel is arranged in a circular ring shape with the same interval and centering on the concrete foundation center, and is bound with a binding wire at the intersection with the stress steel and the construction steel.

[0009] Further, among the plurality of distribution steels on the construction steel, one distribution steel with an outer diameter larger than that of the other distribution steels is used as a standing steel.

[0010] Further, the standing steel is located at the middle position of the plurality of distribution steels in the upper layer.

[0011] Further, the concrete foundation center is provided with a steel cylinder for positioning and supporting the stress steel and the construction steel, wherein the stress steel and the construction steel are bent and inserted into the steel cylinder for anchoring.

[0012] The foundation template comprises a steel template assembly arranged outside the reinforced concrete foundation, and the steel template assembly is composed of a plurality of arc-shaped steel templates arranged in a ring shape with equal intervals around the outside of the reinforced concrete foundation, and the adjacent sides of every two arc-shaped steel templates are fixed by steel buckle members.

[0013] Further, each of the arc-shaped steel templates has an outward turned edge, and at least two positioning holes for installing the buckle members are formed on the two sides of the arc-shaped steel template.

[0014] Further, the steel template assembly is bundled with at least two soft steel ropes for fastening the arc-shaped steel templates, and the outward turned edge of the arc-shaped steel template is provided with a fixing groove for adapting the soft steel rope.

[0015] Further, the fixing groove is an inclined groove, and the side inclined downward is close to the concrete foundation; and the groove opening of the fixing groove is chamfered.

[0016] Further, one of the arc-shaped steel templates is provided with a hand-operated ratchet fastener for pulling and tightening or loosening the soft steel rope.

[0017] The technical scheme provided by the application has the beneficial effects that:

[0018] 1、The utility model discloses, under the same concrete consumption (the foundation volume is invariable), neither consider the height of foundation, the foundation bottom area is invariable, the geometric shape of foundation changes from rectangle to circle, makes the circular area equal with the rectangular area, then, the distance from the foundation center point to the arbitrary point on the circumference is the radius of circle, thereby, the anti-overturning moment of foundation in any direction is same, avoids the safety redundancy of rectangular foundation, saves the steel material.

[0019] 2. The arc-shaped steel formwork is completely matched with the circular foundation in geometric shape, the complicated process of traditional rectangular foundation artificial brick laying brick formwork is eliminated, labor and materials are saved, the steel formwork can be used repeatedly, and the cost is saved accordingly. Ensure that the formwork is installed once, reduce the splicing error. Simplify the formwork and formwork process, and avoid the risk of formwork deformation, ensure the roundness and size accuracy of the foundation outer contour. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0021] Figure 1 The existing rectangular reinforced concrete foundation bearing engineering tower crane state diagram;

[0022] Figure 2 The existing rectangular reinforced concrete foundation top view schematic diagram;

[0023] Figure 3 The existing rectangular reinforced concrete foundation and the improved circular concrete foundation of the present application are compared;

[0024] Figure 4 The sectional view of the reinforced concrete foundation of the present application is shown;

[0025] Figure 5 The reinforced concrete foundation of the present application is shown;

[0026] Figure 6 The reinforced concrete foundation of the present application is shown;

[0027] Figure 7 The foundation formwork of the present application is shown;

[0028] Figure 8 The existing arc-shaped steel formwork is shown.

[0029] In the drawing: 10 concrete foundation, 20 steel bar, 21 stress steel bar, 22 construction steel bar, 23 distribution steel bar, 30 steel cylinder, 40 steel formwork assembly, 41 arc-shaped steel formwork, 42 outer edge flange, 43 positioning hole, 44 buckle, 45 hand-operated ratchet tightener, 46 soft steel cable, 47 fixed groove. DETAILED DESCRIPTION

[0030] The technical solutions of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model. Embodiment 1

[0031] With reference to Figure 1 , Figure 2 , Figure 3 , a reinforced concrete foundation of a tower crane, comprising a concrete foundation 10 and various types of steel bars 20 arranged in the concrete foundation 10; the concrete foundation 10 is circular, and the distance from the center point of the concrete foundation 10 to any point on the circumference of the concrete foundation 10 is the radius of the circle, so that the overturning moment resistance of the concrete foundation 10 in any direction is the same. According to calculation, when the side length of the rectangular foundation is L, the radius of the circular foundation with the same area is: L / 2. As shown in Figure 3 , a circle is made with the rectangular center point as the center and L / 2 as the radius. At this time, the overturning moment resistance of the circular foundation is the radius L / 2 of the circle. As shown in the figure. Since L / 2>L / 2, the overturning moment resistance in any direction of the circular foundation as the foundation of the tower crane is greater than the minimum overturning moment resistance of the rectangular foundation, which improves the minimum overturning distance L / 2 of the rectangular foundation by approximately 1.13 times. As can be seen, the overturning moment resistance of the circular foundation is greater, which is safer in resisting the overturning moment, and eliminates the redundant safety redundancy. Figure 3 With reference to ,

[0032] , Figure 4 , the steel bars 20 comprise a plurality of stress steel bars 21, construction steel bars 22 and distribution steel bars 23 arranged above the stress steel bars 21 and the construction steel bars 22 respectively; the stress steel bars 21 and the construction steel bars 22 are respectively located at the bottom and the top of the foundation 10, and are arranged in a radial manner towards the circumference of the foundation 10 with the center of the foundation 10 as the center; the lower steel bars of the concrete foundation 10 are the stress steel bars 21, which are used to exert the tensile mechanical properties of the steel bars, and the diameter and quantity of the steel bars are determined by calculation. In addition, the construction steel bars 22 leave a 50mm protective layer with the foundation. Figure 5 Figure 6 The distribution steel bars 23 are arranged in a circular ring shape with the same spacing with the center of the foundation 10 as the center, and are bound with a wire at the intersection with the stress steel bars 21 and the construction steel bars 22 respectively.

[0033] The distribution steel bars 23 are arranged in a circular ring shape with the same spacing with the center of the foundation 10 as the center, and are bound with a wire at the intersection with the stress steel bars 21 and the construction steel bars 22 respectively.

[0034] ​​Further, among the plurality of distribution steel bars 23 located on the construction steel bar 22, one distribution steel bar 23 with an outer diameter larger than that of the other distribution steel bars 23 is used as a standing steel bar. The standing steel bar is located at the middle position of the plurality of distribution steel bars 23.

[0035] Further, the concrete foundation 10 is provided with a steel cylinder 30 as a positioning and supporting node for the stress steel bar 21 and the construction steel bar 22. The stress steel bar 21 and the construction steel bar 22 are bent and inserted into the steel cylinder 30 for anchoring. Embodiment 2

[0036] With reference to Figure 7 , Figure 8 The foundation formwork comprises a steel formwork assembly 40 arranged outside the reinforced concrete foundation. The steel formwork assembly 40 is composed of a plurality of arc-shaped steel formworks 41 arranged in a ring shape around the outside of the reinforced concrete foundation 10 at equal intervals. The adjacent sides of every two arc-shaped steel formworks 41 are fixed by buckle members 44. This design not only provides a stable support structure to ensure that the concrete foundation maintains a circular shape during pouring, but also improves the splicing accuracy and overall rigidity of the formwork through the fixing method of the buckle members 44, thereby effectively preventing displacement or deformation of the formwork during construction and ensuring the forming quality and dimensional accuracy of the concrete foundation. At the same time, the ring-shaped and equidistant arrangement of the arc-shaped steel formworks 41 matches the circular structure of the reinforced concrete foundation 10, further enhancing the adaptability and stability of the steel formwork assembly 40. During construction, the arc-shaped steel formworks 41 are arranged in a ring shape around the outside of the reinforced concrete foundation 10 at equal intervals, forming a complete circular steel formwork assembly 40. Every two adjacent arc-shaped steel formworks 41 are fixed by buckle members 44, ensuring that the steel formwork assembly 40 can withstand the lateral pressure of the concrete during pouring without displacement or deformation. The fixing method of the buckle members 44 not only improves the splicing accuracy, but also allows the steel formwork assembly 40 to uniformly transmit pressure during pouring, thereby ensuring the forming quality of the concrete foundation 10. After the concrete solidifies, the steel formwork assembly 40 can be easily removed, and the design of the buckle members 44 makes the formwork removal more efficient. Each steel formwork is controlled at about 35KG, which is beneficial for manual handling and assembly and disassembly.

[0037] Each arc-shaped steel formwork 41 has an outward flange 42 around its periphery, and at least two positioning holes 43 for installing the buckle members 44 are formed on both sides of the arc-shaped steel formwork 41. These positioning holes 43, in cooperation with the buckle members 44, can ensure the accurate alignment and fixation between adjacent arc-shaped steel formworks 41, improve the overall stability and rigidity of the steel formwork assembly 40, and thus provide more reliable support and positioning during concrete pouring.

[0038] The steel formwork assembly 40 is externally bundled with at least two soft steel cables 46 for fastening the arc-shaped formworks 41, wherein the outer part of the arc-shaped steel formworks 41 is externally provided with fixing grooves 47 for accommodating the soft steel cables 46. One of the arc-shaped steel formworks 41 is provided with a hand-operated ratchet fastener 45 for pulling and tightening or loosening the soft steel cables 46. During construction, the soft steel cables 46 are externally bundled on the steel formwork assembly 40 through the hand-operated ratchet fastener 45, forming a uniform restraining force to tightly fix the multiple arc-shaped steel formworks 41 together. The design of the fixing grooves 47 allows the soft steel cables 46 to be securely embedded on the outer part of the arc-shaped steel formworks 41, thereby providing stable lateral support during concrete pouring. When pouring concrete, the soft steel cables 46 resist the lateral pressure generated by the concrete through their high strength and elasticity, preventing the steel formwork assembly 40 from deforming or displacing, ensuring the molding quality of the concrete foundation 10. The close fit between the fixing grooves 47 and the soft steel cables 46 allows the restraining force to be evenly distributed, further enhancing the stability of the steel formwork assembly 40. After the concrete solidifies, the soft steel cables 46 can be easily removed by loosening the soft steel cables through the hand-operated ratchet fastener 45, and the steel formwork assembly 40 can be efficiently dismantled and reused, further improving construction efficiency and economy. This design ensures the stability and reliability of the steel formwork assembly 40 during construction through the synergistic effect of the soft steel cables 46 and the fixing grooves 47, while simplifying the process of disassembling and reusing the formwork.

[0039] The fixing grooves 47 are inclined grooves, with the side inclined downward close to the concrete foundation 10. This inclined design allows the soft steel cables 46 to be effectively positioned when embedded in the fixing grooves 47, thereby facilitating the easier splicing of multiple arc-shaped steel formworks 41 into a circular shape. This design not only enhances the firmness of the steel formwork assembly 40, ensuring that the formwork does not displace during concrete pouring, but also allows the restraining force of the soft steel cables 46 to be more evenly distributed throughout the steel formwork assembly 40 through the guiding effect of the inclined grooves 45. In addition, the design of the inclined grooves 45 simplifies the installation and removal process of the soft steel cables 46, improves construction efficiency, and ensures the reusability of the steel formwork assembly 40, further reducing construction costs.

[0040] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An engineered tower crane reinforced concrete foundation, characterized in that, The application relates to a reinforced concrete foundation, which comprises a concrete foundation (10) and steel bars (20) arranged in the concrete foundation (10); the concrete foundation (10) is circular, the distance from the center point of the concrete foundation (10) to any point on the circumference of the concrete foundation (10) is the radius of the circle, so that the overturning moment of the concrete foundation (10) in any direction is the same.

2. The engineered tower crane reinforced concrete foundation of claim 1, wherein, The steel bars (20) comprise a plurality of stress steel bars (21), construction steel bars (22) and distribution steel bars (23) arranged above the stress steel bars (21) and the construction steel bars (22) respectively. The stress steel bars (21) and the construction steel bars (22) are respectively arranged at the bottom and the top of the concrete foundation (10) and radially arranged towards the circumference of the concrete foundation (10) with the center of the concrete foundation (10) as the center. The distribution steel bars (23) are arranged in the form of a circular ring with the center of the concrete foundation (10) as the center and with the same spacing, and are bound with a binding wire at the intersection with the stress steel bars (21) and the construction steel bars (22) respectively.

3. The engineered tower crane reinforced concrete foundation of claim 2, wherein, Among the plurality of distribution steel bars (23) arranged on the construction steel bars (22), one distribution steel bar (23) with a larger outer diameter than the other distribution steel bars (23) is used as a supporting steel bar.

4. The engineered tower crane reinforced concrete foundation of claim 3, wherein, The supporting steel bar is located at the middle position of the upper layer of the plurality of distribution steel bars (23).

5. The engineered tower crane reinforced concrete foundation of claim 2, wherein, Steel cylinders (30) are arranged in the concrete foundation (10) to position and support the stress steel bars (21) and the construction steel bars (22), wherein the stress steel bars (21) and the construction steel bars (22) are bent and extended to be inserted into the steel cylinders (30) for anchoring.

6. A base template characterized in that, The application further relates to a steel formwork assembly (40) arranged outside the reinforced concrete foundation, which is composed of a plurality of arc-shaped steel formworks (41) arranged in the form of a ring around the outside of the reinforced concrete foundation (10) at equal intervals, and the adjacent sides of every two arc-shaped steel formworks (41) are fixed by steel buckle members (44).

7. The base template of claim 6, wherein, Each arc-shaped steel formwork (41) has an outward flange (42) on the outer periphery, and at least two positioning holes (43) for mounting the buckle members (44) are arranged on the two sides of the arc-shaped steel formwork (41).

8. The base template of claim 7, wherein, The steel formwork assembly (40) is bound by at least two soft steel cables (46) for fastening the arc-shaped steel formworks (41) outside, wherein the outward flanges (42) of the arc-shaped steel formworks (41) are provided with fixing grooves (47) for adapting the soft steel cables (46) outside.

9. The base template of claim 8, wherein, The fixing grooves (47) are inclined grooves, and the side inclined downward is close to the concrete foundation (10); and the groove opening of the fixing grooves (47) has a chamfer.

10. The base template of claim 8, wherein, One of the arc-shaped steel formworks (41) is provided with a hand-operated ratchet fastener (45) for pulling and tightening or loosening the soft steel cable (46).

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