Automatically-adjustable cast-in-place pile protection layer thickness positioning device

Abstract

The utility model discloses an automatically adjustable cast-in-place pile protective layer thickness positioning device which comprises a connecting rod framework and at least three compression springs arranged in the radial direction of the connecting rod framework, the outline of the connecting rod framework is smaller than or coincides with the outline of a reinforcement cage, and the connecting rod framework is connected with the inner ends of the compression springs. The distance between the outer end face of the protection layer cushion block and the outline of the reinforcement cage is larger than the thickness C of the protection layer in the natural state of the compression spring, and the thickness of the protection layer cushion block is smaller than the thickness C of the protection layer. The device has the advantages that the device is integrally simple in structure and can be manufactured by materials on site, and construction optimization can be carried out on the cast-in-place pile without too much extra investment; the protective layer cushion block is maintained in the protective layer pouring area, and the minimum outer layer pouring thickness is provided through the protective layer cushion block; the connecting rod framework drives the reinforcement cage to be centered and positioned, and the position accuracy during reinforcement cage hoisting is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and in particular relates to an automatically adjustable cast-in-place pile protective layer thickness positioning device. Background Art

[0002] Cast-in-place piles are a type of pile made by drilling holes in place and pouring concrete or reinforced concrete. Cast-in-place piles are widely used in construction because of their advantages such as no vibration, no soil squeezing, low noise, and suitability for use in densely built urban areas.

[0003] In cast-in-place pile construction, the position of the steel cage is extremely important. If the position is misaligned, it will first affect the thickness of the protective layer. Since the thickness of the protective layer is thin, it is easy to expose the steel bars, affecting the subsequent use and life of the building. More importantly, the misalignment of the steel cage will reduce the overall quality and strength of the pile body, requiring additional reinforcement construction, which will increase the construction cost and be time-consuming and labor-intensive. Utility Model Content

[0004] The utility model aims to provide an automatically adjustable cast-in-place pile protective layer thickness positioning device, which solves the problems of steel cage positioning deviation and thin protective layer thickness in cast-in-place pile construction.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] An automatically adjustable cast-in-place pile protective layer thickness positioning device comprises a connecting rod skeleton, the contour of the connecting rod skeleton is smaller than or overlaps with the contour of a steel cage, and also comprises at least three compression springs arranged radially along the connecting rod skeleton, the connecting rod skeleton is connected to the inner end of the compression spring, the outer end of the compression spring is connected to a protective layer pad, and in the natural state of the compression spring, the distance between the outer end surface of the protective layer pad and the contour of the steel cage is greater than the protective layer thickness C, and the thickness of the protective layer pad is less than the protective layer thickness C.

[0007] Furthermore, the protective layer pad is a concrete block or a mortar cement block.

[0008] Furthermore, the outer end of the compression spring is embedded and cast in the protective layer pad.

[0009] Furthermore, the inner end of the compression spring is welded to the connecting rod skeleton.

[0010] Furthermore, the connecting rod skeleton is in the shape of a triangle frame, a circular ring, a polygonal frame or a central radiation rod structure.

[0011] Furthermore, the central radiation rod structure is a cross-shaped, *-shaped or M-shaped structure.

[0012] Furthermore, the connecting rod skeleton includes a first connecting rod and a second connecting rod, both ends of the first connecting rod and the second connecting rod are connected with compression springs, and the first connecting rod and the second connecting rod are connected to form a cross structure.

[0013] Furthermore, the ends of the first connecting rod and the second connecting rod are both connected to the compression spring sleeve.

[0014] Furthermore, a bridge portion is provided in the middle of the first connecting rod, and the second connecting rod is passed through a bridge hole between the bridge portion and the first connecting rod and is fixed.

[0015] Furthermore, the first connecting rod and the second connecting rod are fixed by welding.

[0016] Beneficial effects of the utility model:

[0017] (1) The overall structure of the device is relatively simple and can be manufactured using materials on site, so the construction of the bored pile can be optimized without excessive additional investment.

[0018] (2) The compression spring supports the protective layer pad outward, so that the protective layer pad is maintained within the protective layer casting area, and the protective layer pad is used to provide a minimum outer layer casting thickness.

[0019] (3) The compression spring supports the connecting rod frame inward, so that the connecting rod frame drives the steel cage to be centered and positioned, ensuring the accurate position of the steel cage during hoisting.

[0020] The aforementioned main scheme of the utility model and its further options can be freely combined to form multiple schemes, all of which are schemes that can be adopted and protected by the utility model; and in the utility model, (non-conflicting options) options and other options can also be freely combined. After understanding this scheme, those skilled in the art can understand that there are many combinations based on the existing technology and common knowledge, all of which are technical schemes to be protected by the utility model, and they are not exhaustively listed here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural plan view of embodiment 1 of the utility model.

[0022] Figure 2 It is a structural sectional view of embodiment 1 of the present utility model.

[0023] Figure 3 It is a schematic diagram of the first (or second) connecting rod structure of Example 1 of the utility model.

[0024] Figure 4 This is a disassembled diagram of the first (or second) connecting rod structure of Example 1 of the utility model.

[0025] Figure 5This is a schematic diagram of the connection between the first and second connecting rods in Example 1 of the utility model.

[0026] In the figure: 1-protective layer pad, 2-compression spring, 3-connecting rod skeleton, 4-first connecting rod, 5-second connecting rod, 6-bridge part; pile diameter D, steel cage diameter L, protective layer thickness C. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with specific embodiments and drawings.

[0028] refer to Figure 1 to Figure 5 As shown, an automatically adjustable cast-in-place pile protective layer thickness positioning device comprises a protective layer pad 1, a compression spring 2 and a connecting rod skeleton 3, wherein the connecting rod skeleton 3 is connected to the inner end of the compression spring 2, and the outer end of the compression spring 2 is connected to the protective layer pad 1.

[0029] The protective layer pad 1 is a concrete block or a mortar cement block, and its size is preferably 1.50*50*30mm. The protective layer pad 1 is supported by the compression spring 2 in the protective layer pouring area. Even if the steel cage is displaced excessively and the compression spring 2 is completely compressed, the protective layer pad 1 can still remain in the area outside the steel cage outline, thereby forming a minimum limit on the thickness of the protective layer.

[0030] The compression spring 2 is made of compression-resistant alloy spring steel, and the size is preferably 3*18*80mm. Its outer end is pre-buried and cast in the protective layer pad 1, and its inner end is welded and connected to the connecting rod skeleton 3. The compression spring 2 is supported between the protective layer pad 1 and the connecting rod skeleton 3, and the support of the pile wall is used to provide an inward alignment and positioning function. In addition, the compression spring 2 itself has elasticity, and to a certain extent, it can also meet the construction of pile holes with different pile diameters D, or overcome the errors in different opening diameters.

[0031] The connecting rod skeleton 3 is a main body that needs to be installed and fixed on the steel cage. The outline of the connecting rod skeleton 3 is smaller than or overlaps with the outline of the steel cage. Since the outline of the steel cage is mostly cylindrical, the connecting rod skeleton 3 can be limited within the cylindrical shape. If the outline of the connecting rod skeleton 3 is larger than the outline of the steel cage, the contact between the connecting rod skeleton 3 and the pile wall is likely to affect normal hanging. It is preferred that the outline of the connecting rod skeleton 3 overlaps the outline of the steel cage, so that even if the spring is absolutely compressed, the outer position of the pad can be maintained.

[0032] The connecting rod skeleton 3 is a triangular frame, a circular ring, a polygonal frame or a central radiation rod structure, and the structure can be selected according to needs, as long as it can form an overall stable and reliable frame. The central radiation rod structure can be a cross, an * or a M-shaped structure. The central radiation rod structure is simple to process and manufacture, and the overall arrangement is mostly symmetrical. The compression spring 2 can also be directly installed using the radiation rod, which is a preferred solution.

[0033] At least three compression springs 2 are arranged radially along the connecting rod skeleton 3, and several compression springs 2 are evenly arranged in the circumferential direction. The supporting force directions of all compression springs 2 coincide at the center, thereby achieving the function of center positioning and guiding.

[0034] In the natural state (no force), the distance between the outer end face of the protective layer pad 1 and the outline of the steel cage is greater than the protective layer thickness C, so that when the steel cage is hoisted into the hole, the compression spring 2 is compressed and has an inward force. The thickness of the protective layer pad 1 is less than the protective layer thickness C, providing a variable margin for the hoisting of the steel cage.

[0035] Example 1

[0036] refer to Figure 1 to Figure 5 As shown, an automatically adjustable cast-in-place pile protective layer thickness positioning device provides a specific structural solution of a connecting rod skeleton 3 of a cross-shaped central radiation rod structure on the basis of the above-mentioned device.

[0037] The connecting rod skeleton 3 includes a first connecting rod 4 and a second connecting rod 5, both of which are made of third-grade threaded steel with a diameter of 16 mm. Both ends of the first connecting rod 4 and the second connecting rod 5 are connected with compression springs 2. The ends of the first connecting rod 4 and the second connecting rod 5 are sleeved and connected with the compression spring 2 and welded to ensure that the compression spring 2 has good radial arrangement accuracy.

[0038] The first connecting rod 4 and the second connecting rod 5 are connected to form a cross-shaped structure. Specifically, the middle part of the first connecting rod 4 is welded or integrally provided with an arched bridge portion 6, and the second connecting rod 5 is inserted into a bridge hole between the bridge portion 6 and the first connecting rod 4 and welded and fixed. This method ensures that the cross-connection node of the two connecting rods has reliable strength.

[0039] The production process of this utility model:

[0040] 1. Make 50*50*30mm open concrete or mortar cement block mold;

[0041] 2. Apply emulsified oil or other demoulding agent inside the mold;

[0042] 3. Place a 3*18*80mm compression spring in the center of the mold, with the compression spring 5mm-10mm away from the bottom of the mold;

[0043] 4. Pour concrete or mortar cement. One person can cooperate in the pouring process to adjust the verticality of the compression spring at any time to ensure that it is in the middle as much as possible;

[0044] 5.Maintenance pad forming;

[0045] 6. Insert 25mm of 16mm diameter grade 3 threaded steel into the unconnected part of the formed pad spring with a certain strength, and spot weld the steel connecting rod and spring to ensure the connection is firm. The whole device is completed. Keep the length of the steel connecting rod the same as the diameter of the steel cage.

[0046] The use process of the utility model and the steel cage hoisting process:

[0047] 1. String the formed spring concrete connecting rod device into the prepared steel cage along the diameter direction;

[0048] 2. Install another forming device at the unconnected part of the connecting rod, and spot weld the spring and the connecting rod. At the same time, spot weld the connecting rod and the steel keel firmly, and be careful not to damage the main reinforcement. The two connecting rods are in a cross-shaped form. Note that the intersection of the two connecting rods can be bent and passed in a "bridge" manner, and spot welded to fix the connection;

[0049] 3. Install the cross cast-in-place pile protective layer thickness positioning device one by one according to steps 1 and 2, taking 2m as a section;

[0050] 4. After the positioning device is installed as a whole, square wood is placed on the steel cage to prevent direct contact with the placement layer from damaging the device;

[0051] 5. When lifting the steel cage, pay attention to the alignment of the center axis of the cage body and the center axis of the pile hole. During the cage lowering process, the spring device can be freely adjusted according to the different protective layer thicknesses of the cast-in-place piles;

[0052] 6. After the whole process is completed, concrete can be poured to finally form piles.

[0053] The above basic examples and further optional examples of the utility model can be freely combined to form multiple embodiments, which are all embodiments that can be adopted and claimed for protection by the utility model. In the scheme of the utility model, each optional example can be arbitrarily combined with any other basic examples and optional examples.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatically adjustable cast-in-place pile protective layer thickness positioning device, comprising a connecting rod skeleton (3), characterized in that: The outline of the connecting rod skeleton (3) is smaller than or overlaps with the outline of the steel cage, and also includes at least three compression springs (2) arranged radially along the connecting rod skeleton (3), the connecting rod skeleton (3) is connected to the inner end of the compression spring (2), the outer end of the compression spring (2) is connected to the protective layer pad (1), and the distance between the outer end surface of the protective layer pad (1) and the outline of the steel cage in the natural state of the compression spring (2) is greater than the protective layer thickness C, and the thickness of the protective layer pad (1) is less than the protective layer thickness C.

2. The automatically adjustable cast-in-place pile protective layer thickness positioning device according to claim 1 is characterized in that: The protective layer pad (1) is a concrete block or a mortar cement block.

3. The automatically adjustable cast-in-place pile protective layer thickness positioning device according to claim 1 is characterized in that: The outer end of the compression spring (2) is pre-buried and cast in the protective layer pad (1).

4. The automatically adjustable cast-in-place pile protective layer thickness positioning device according to claim 1 or 3, characterized in that: The inner end of the compression spring (2) is welded to the connecting rod skeleton (3).

5. The automatically adjustable cast-in-place pile protective layer thickness positioning device according to claim 1 is characterized in that: The connecting rod skeleton (3) is in the shape of a triangle frame, a circular ring, a polygonal frame or a central radiation rod structure.

6. The automatically adjustable cast-in-place pile protective layer thickness positioning device according to claim 5 is characterized in that: The central radiation rod structure is a cross-shaped, *-shaped or M-shaped structure.

7. The automatically adjustable cast-in-place pile protective layer thickness positioning device according to claim 6 is characterized in that: The connecting rod skeleton (3) comprises a first connecting rod (4) and a second connecting rod (5), both ends of the first connecting rod (4) and the second connecting rod (5) are connected with compression springs (2), and the first connecting rod (4) and the second connecting rod (5) are connected to form a cross-shaped structure.

8. The automatically adjustable cast-in-place pile protective layer thickness positioning device according to claim 7 is characterized in that: The ends of the first connecting rod (4) and the second connecting rod (5) are both sleeve-connected to the compression spring (2).

9. The automatically adjustable cast-in-place pile protective layer thickness positioning device according to claim 7, characterized in that: A bridge portion (6) is provided in the middle of the first connecting rod (4), and the second connecting rod (5) is inserted into a bridge hole between the bridge portion (6) and the first connecting rod (4) and is fixed.

10. The automatically adjustable cast-in-place pile protective layer thickness positioning device according to claim 7 or 9, characterized in that: The first connecting rod (4) and the second connecting rod (5) are fixed by welding.

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