Thickness control device for pile foundation reinforcement cage protection layer

Abstract

The utility model discloses a pile foundation reinforcement cage protective layer thickness control device, which comprises a pile foundation reinforcement cage and a positioning device, the positioning device is composed of an inner side gasket, an outer side gasket, a screw, a sleeve and an adjusting gasket, the inner side gasket is welded on a reinforcement cage longitudinal bar, one end of the screw is fixed in the middle of the inner side gasket, and the other end of the screw is fixed on the outer side gasket. One end of the screw rod is connected with the screw rod, the other end of the screw rod is rotatably connected with the sleeve, one end, far away from the screw rod, of the sleeve is fixed in the middle of the outer gasket, the radian of the outer gasket is consistent with that of the inner side wall of the pile hole, the outer gasket abuts against the inner wall of the pile hole, and the adjusting gasket sleeves the screw rod and is located between the sleeve and the inner gasket. Compared with the prior art, the thickness of the protection layer of the reinforcement cage can be adjusted and controlled according to the design requirement, meanwhile, the hole wall can be effectively protected against collapse and damage caused by displacement of the reinforcement cage due to concrete vibration, finally, the pile foundation construction quality is effectively guaranteed, and the construction efficiency and economic benefits are improved.

Description

Technical Field

[0001] The utility model relates to the field of engineering construction, in particular to a device for controlling the thickness of a protective layer of a pile foundation reinforcement cage. Background Art

[0002] Precast piles and cast-in-place piles are widely used in foundation engineering of various engineering constructions. Steel cages are often used in the production of precast piles and cast-in-place piles. As the main skeleton of the pile body, they can enhance the bearing capacity and stability of the pile. The thickness control of the protective layer of the pile foundation steel cage is an important construction link in the pile foundation construction process. Its construction precision is high, and construction personnel need to have a high level of technology and strict operating specifications. At the same time, during the pouring of concrete, the vibration operation is very likely to cause the steel cage to shift, which in turn affects the control of the thickness of the protective layer, and even causes damage to the hole wall and collapse. Ultimately, it will directly affect the bearing capacity and durability of the pile foundation, and there are certain quality risks, causing unnecessary economic losses. Utility Model Content

[0003] The purpose of the utility model is to provide a device for controlling the thickness of the protective layer of the steel cage for pile foundations which solves the above-mentioned problem. The device can adjust and control the thickness of the protective layer of the steel cage according to the design requirements, and can also effectively protect the hole wall from collapse and damage caused by the displacement of the steel cage due to concrete vibration, thereby effectively ensuring the quality of pile foundation construction and improving construction efficiency and economic benefits.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a device for controlling the thickness of the protective layer of a pile foundation steel cage, comprising a pile foundation steel cage and a positioning device, wherein the pile foundation steel cage is located in the pile hole and is composed of steel cage longitudinal bars and steel cage hoops, and the positioning device is composed of an inner gasket, an outer gasket, a screw, a sleeve and an adjusting gasket, the inner gasket is welded to the steel cage longitudinal bars, one end of the screw is fixed to the middle of the inner gasket, and the other end is rotatably connected to the sleeve, the end of the sleeve away from the screw is fixed to the middle of the outer gasket, the curvature of the outer gasket is consistent with the curvature of the inner wall of the pile hole, and is close to the inner wall of the pile hole, and the adjusting gasket is sleeved on the screw and is located between the sleeve and the inner gasket.

[0005] Preferably, there are two or more positioning devices, which are evenly spaced and distributed along the circumference of the pile foundation reinforcement cage.

[0006] Preferably, the inner gasket is welded to a plurality of longitudinal bars of the steel cage.

[0007] Preferably, the inner gasket is welded to the adjacent longitudinal reinforcement of the steel cage.

[0008] Preferably, the adjusting gasket has a plurality of pieces, and the diameter of the central hole of the adjusting gasket is larger than the diameter of the screw and smaller than the diameter of the sleeve.

[0009] Preferably, the inner gasket, outer gasket, screw and sleeve are all made of metal materials.

[0010] Compared with the prior art, the advantages of the utility model are:

[0011] (1) The utility model can adjust and control the thickness of the protective layer of the steel cage according to the design requirements, and can also effectively protect the hole wall from collapse and damage caused by the displacement of the steel cage caused by concrete vibration, thereby effectively ensuring the quality of pile foundation construction and improving construction efficiency and economic benefits.

[0012] (2) Precise control of the thickness of the protective layer: The device can accurately control the thickness of the protective layer of the steel cage by using a combination of inner gaskets, outer gaskets and adjusting gaskets, combined with the sleeve and screw connection method. This precise control helps to ensure that the steel cage can achieve the best protection effect in different engineering environments.

[0013] (3) Protect the quality of the steel cage and the inner wall of the pile hole: The device can reduce the deformation of the steel cage caused by external forces during the lifting process to a certain extent by welding the inner gasket to the inner longitudinal reinforcement of the steel cage. At the same time, the arc-shaped outer gasket of the device increases the contact area with the soil on the inner wall of the pile hole, which can reduce the damage to the inner wall of the pile hole during the installation of the steel cage, thereby improving the quality of the pile foundation.

[0014] (4) Easy to install and adjust: The device has a reasonable structural design and the installation steps are simple and clear, so the operator can quickly complete the installation work. At the same time, by adjusting the number and thickness of the adjusting gaskets and the rotation stroke of the sleeve screw, the thickness of the protective layer can be easily adjusted to meet different engineering needs.

[0015] (5) Improve project quality: By accurately controlling the thickness of the protective layer of the steel cage, the device helps to improve the quality of the project. Reasonable control of the thickness of the protective layer is of great significance for preventing steel corrosion and ensuring structural safety, thereby ensuring the durability and safety of the project.

[0016] (6) Strong applicability: The device is suitable for different types of steel cages and different engineering environments. It has strong versatility and flexibility. Whether it is a bridge, building or other infrastructure project, the device can be used to control the thickness of the steel cage protective layer and improve the quality of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the utility model being installed on a steel cage;

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0019] In the figure: 1-longitudinal reinforcement of the steel cage; 2-hoops of the steel cage; 3-inner gasket; 4-screw; 5-outer gasket; 6-sleeve; 7-adjusting gasket. DETAILED DESCRIPTION

[0020] Embodiment: During the construction of cast-in-place piles, the control of the thickness of the protective layer is very important, as it directly affects the quality and service life of the pile foundation. The thickness of the protective layer refers to the distance between the longitudinal reinforcement of the steel cage and the outer surface of the cast concrete. The control of the thickness of the protective layer is very important, as it directly affects the quality and service life of the pile foundation. The function of the protective layer is to protect the steel bars from erosion and damage from the external environment. If the thickness of the protective layer is too small, the steel bars will be susceptible to corrosion and damage, thereby reducing the bearing capacity and service life of the pile foundation; while an excessively large thickness of the protective layer will increase the project cost and construction difficulty, and reduce the force effect of the pile foundation. In order to achieve the control of the thickness of the protective layer of the pile foundation steel cage, a device for controlling the thickness of the protective layer of the pile foundation steel cage is proposed, see. Figure 1 to Figure 2 , the utility model will be further described below.

[0021] A device for controlling the thickness of a protective layer of a pile foundation steel cage comprises a pile foundation steel cage and a positioning device, wherein the pile foundation steel cage is located in a pile hole and is composed of a steel cage longitudinal reinforcement 1 and a steel cage hoop reinforcement 2, the positioning device is composed of an inner gasket 3, an outer gasket 5, a screw 4, a sleeve 6 and an adjusting gasket 7, the inner gasket 3 is welded to the steel cage longitudinal reinforcement 1, one end of the screw 4 is fixed to the middle of the inner gasket 3, and the other end is rotatably connected to the sleeve 6, the end of the sleeve 6 away from the screw 4 is fixed to the middle of the outer gasket 5, the curvature of the outer gasket 5 is consistent with the curvature of the inner wall of the pile hole, and is close to the inner wall of the pile hole, and the adjusting gasket 7 is sleeved on the screw 4 and is located between the sleeve 6 and the inner gasket 3. The utility model positions the longitudinal reinforcement 1 of the steel cage by means of the inner gasket 3, adjusts the spacing between the inner gasket 3 and the outer gasket 5 by means of the screw 4 and the sleeve 6, and accurately controls the thickness spacing by increasing or decreasing the gasket 7. A plurality of positioning devices cooperate to form a protective layer thickness control system, thereby ensuring that the thickness of the protective layer of the steel cage meets the design requirements.

[0022] Among them, the inner gasket 3 is a part of the positioning device. The inner gasket 3 is designed in length according to the needs and can be welded to multiple steel cage longitudinal bars 1. This embodiment takes the welding of adjacent steel cage longitudinal bars 1 as an example to fix the adjacent steel cage longitudinal bars 1 together, which can also reduce the influence of external force on the deformation of the steel cage during the hoisting process to a certain extent. The inner gasket 3 is made of metal material and can be fixed on the steel cage longitudinal bars 1 of the steel cage by welding to ensure stability and reliability for long-term use.

[0023] Among them, the outer gasket 5 is processed to be consistent with the curvature of the inner wall of the pile hole as a part of the positioning device. When the steel cage and the positioning device are hoisted into the pile hole together, the arc design of the outer gasket 5 can make the outer gasket 5 close to the inner wall of the pile hole, provide support for the positioning device, and ensure the thickness spacing between the longitudinal reinforcement 1 of the steel cage and the inner wall of the pile hole, so that when pouring concrete, a concrete protective layer that meets the requirements is formed. The arc structure with the same radius as the hole wall can increase the contact area with the inner wall of the pile hole, reduce the damage to the inner wall of the pile hole, and thus improve the quality of the reinforced concrete pile foundation. The outer gasket 5 is also made of metal material.

[0024] To ensure that the thickness of the protective layer around the pile foundation reinforcement cage meets the requirements, two or more positioning devices need to be used, and the positioning devices are evenly spaced along the circumferential direction of the pile foundation reinforcement cage.

[0025] In order to achieve precise regulation of the spacing, the adjusting gasket 7 has several pieces, and the adjusting gasket 7 plays the role of adjustment and protection. By adjusting the number and thickness of the adjusting gasket 7, the thickness of the protective layer of the steel cage can be accurately controlled to meet different engineering requirements. In order to avoid offset errors during the hoisting and pouring of the steel cage, when adjusting the adjusting gasket 7, its spacing must be greater than the set standard thickness, leaving an error margin. The diameter of the center hole of the adjusting gasket 7 is greater than the diameter of the screw 4 and smaller than the diameter of the sleeve 6, so that it can be mounted on the screw 4 and against the end of the sleeve 6 to achieve spacing adjustment.

[0026] The utility model adopts the connection mode of screw rod 4 and sleeve 6. It is not only stable and reliable, but also easy to adjust. With the adjustment gasket 7, the thickness of the protective layer of the steel cage can be accurately controlled.

[0027] The above is a detailed introduction to a device for controlling the thickness of a protective layer of a pile foundation steel cage provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea; at the same time, for a general technician in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope, and changes and improvements to the utility model will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A device for controlling the thickness of a pile foundation steel cage protective layer, comprising a pile foundation steel cage and a positioning device, wherein the pile foundation steel cage is located in a pile hole and is composed of steel cage longitudinal bars and steel cage hoop bars, and is characterized in that: The positioning device consists of an inner gasket, an outer gasket, a screw, a sleeve and an adjusting gasket. The inner gasket is welded to the longitudinal reinforcement of the steel cage. One end of the screw is fixed to the middle of the inner gasket, and the other end is rotatably connected to the sleeve. The end of the sleeve away from the screw is fixed to the middle of the outer gasket. The curvature of the outer gasket is consistent with the curvature of the inner wall of the pile hole and is close to the inner wall of the pile hole. The adjusting gasket is mounted on the screw and is located between the sleeve and the inner gasket.

2. A device for controlling the thickness of a pile foundation reinforcement cage protective layer according to claim 1, characterized in that: There are two or more positioning devices, which are evenly spaced and distributed along the circumference of the pile foundation reinforcement cage.

3. A device for controlling the thickness of a pile foundation reinforcement cage protective layer according to claim 2, characterized in that: The inner gasket is welded to a plurality of longitudinal bars of the steel cage.

4. A device for controlling the thickness of a pile foundation reinforcement cage protective layer according to claim 2, characterized in that: The inner gasket is welded to the adjacent longitudinal reinforcement bars of the reinforcement cage.

5. The device for controlling the thickness of the protective layer of a pile foundation reinforcement cage according to claim 1 is characterized in that: The adjusting gasket has a plurality of pieces, and the diameter of the central hole of the adjusting gasket is larger than the diameter of the screw rod and smaller than the diameter of the sleeve.

6. The device for controlling the thickness of the protective layer of a pile foundation reinforcement cage according to claim 1, characterized in that: The inner gasket, the outer gasket, the screw rod and the sleeve are all made of metal materials.

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