Rear-mounted cast-in-place pile reinforcement cage protection layer control cushion block

Abstract

A rear-mounted cast-in-place pile reinforcement cage protective layer control cushion block relates to the technical field of building construction, is used for arranging a protective layer of a cast-in-place pile reinforcement cage and comprises a concrete cushion block and an anti-falling pin shaft which is clamped in the concrete cushion block in a matched mode. The concrete cushion block is of a cake-shaped structure, the circle center is hollowed out, a clamping groove with the same circle center diameter is formed in the portion from the circle center to the edge, and a pair of rectangular openings are formed in the positions, close to the circle center, of the two sides of the clamping groove. The whole anti-falling pin shaft is in a T shape and comprises a rectangular top plate, a pair of clamping plates is arranged on the left side and the right side of the lower surface of the rectangular top plate, the clamping plates retract inwards along the left edge and the right edge of the rectangular top plate to form clamping edges, and the length of the clamping edges is 4 mm. The utility model solves the problem that the overall construction quality of the reinforcement cage is influenced due to high process requirements on workers and the risks of burning the main reinforcement and missing welding during welding.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, and particularly relates to a post - type control cushion block for the protection layer of a cast - in - place pile steel cage. Background Technique

[0002] With the rapid development of construction projects, cast - in - place piles are widely used in foundation engineering. In high - rise buildings, cast - in - place piles are developing towards larger diameters and longer lengths, which puts forward higher requirements for the quality of the cast - in - place pile steel cages. When setting the protection layer of the steel cage on - site, it is usually welded synchronously with the steel cage, that is, 4 protection layers are set in a circle every 4m - 6m along the length of the steel cage. If traditional "U" - shaped steel bars are used for welding as the protection layer of the steel cage, a large amount of welding is required. When using this method to set the protection layer of the steel cage, welders need to be configured, and the technical requirements for workers are high. There are also risks of burning the main bars and missed welding during welding, which will affect the overall construction quality of the steel cage. Therefore, the utility model has developed a post - type control cushion block for the protection layer of a cast - in - place pile steel cage to solve this problem. Content of the Utility Model

[0003] The purpose of the utility model is to provide a post - type control cushion block for the protection layer of a cast - in - place pile steel cage, and solve the following technical problems:

[0004] (1) Avoid a large amount of welding of the cast - in - place pile steel cage and burning the main bars;

[0005] (2) The adaptation problem of the finished protection layer cushion block to spiral stirrups and reinforcement bars of different specifications;

[0006] (3) The simplicity of connection between the finished protection layer cushion block and the steel cage;

[0007] (4) The anti - shedding problem of the finished protection layer cushion block on the steel cage.

[0008] To achieve the above - mentioned purpose, the utility model adopts the following technical scheme:

[0009] A post - type control cushion block for the protection layer of a cast - in - place pile steel cage, used for setting the protection layer of the cast - in - place pile steel cage, includes a concrete cushion block and an anti - shedding pin shaft fitted and clamped in the concrete cushion block;

[0010] The concrete cushion block is in a round cake - like structure with a hollow center. A card slot with the same center diameter is opened from the center to the edge part. A pair of rectangular openings are opened on both sides of the card slot, close to the center position. The thickness of the concrete cushion block is not less than 25mm, the diameter is several times the thickness of the protection layer of the steel cage, and the diameter of the hollow part in the center is larger than the diameter of the reinforcement bar at the installation position.

[0011] The anti - detachment pin shaft is in a "T" shape as a whole, including a rectangular top plate. On the left and right sides of the lower surface of the rectangular top plate, there is a pair of clamping plates. The clamping plates are indented inward along the left and right edges of the rectangular top plate to form clamping edges. The length of the clamping edge is 4 mm. The lower part of the clamping plate is provided with an anti - detachment reverse hook, which is arranged outward. On the front side of the rectangular top plate, there is an arc - shaped plate, and on the rear side of the lower surface of the rectangular top plate, there is a vertical plate;

[0012] A pair of clamping plates fit and are clamped in the rectangular opening, and the rectangular top plate is clamped on the upper surface of the concrete cushion block. The anti - detachment reverse hook is clamped on the lower surface of the concrete cushion block, and the arc - shaped plate is hollowed out towards the center of the circle.

[0013] A further preferred technical solution: The planar size of the anti - detachment pin shaft matches the rectangular opening, and its length is slightly longer than the thickness of the concrete cushion block.

[0014] A further preferred technical solution: The diameter of the hollowed - out part at the center of the concrete cushion block is 4 mm larger than the diameter of the reinforcement bar at the installation position.

[0015] A further preferred technical solution: The anti - detachment pin shaft is made of plastic material or metal material.

[0016] A further preferred technical solution: The strength of the concrete cushion block is greater than or equal to the strength of the pile body concrete.

[0017] A further preferred technical solution: The diameter of the concrete cushion block is 120 mm, the radius of the hollowed - out part at the center is 13 mm, the width of the rectangular opening is 15 mm, and the distance between a pair of rectangular openings is 32 mm.

[0018] A further preferred technical solution: The anti - detachment pin shaft is 40 mm long, 14 mm wide, and 28 mm high; the rectangular top plate is 40 mm long and 14 mm wide; the width of the clamping plate is 13 mm and the height is 28 mm, the length of the anti - detachment reverse hook is 5 mm; the width of the arc - shaped plate is 26 mm and the radius of the curved surface is 13 mm; the width of the vertical plate is 32 mm.

[0019] Compared with the prior art, the present utility model has the following characteristics and beneficial effects:

[0020] The present utility model has the characteristics of simple production, strong site applicability and easy use by on - site workers; compared with the original "U" - shaped steel bar protection layer set in the cast - in - place pile steel cage, it reduces the welding link, avoids the risks of burning the main steel bars of the steel cage and hard quenching of the steel, and at the same time is convenient for installation, speeds up the overall speed of steel cage production, and has good popularization and practical value; the present utility model is not only applicable to cast - in - place piles with wet operation, but also applicable to cast - in - place piles with dry operation such as manually dug piles.

[0021] The utility model mainly replaces a large amount of welding by arranging a concrete pad with the same strength as or greater than the strength of the pile body, thereby avoiding a series of risks caused by welding.

[0022] The utility model is flexible and convenient to use, has the advantages of post-installation and strong applicability, and is applicable to steel cages of rotary-drilled holes and manually-drilled bored piles.

[0023] The utility model can avoid a series of problems such as main reinforcement burns, steel hardening and welding leakage that occur when traditional "U"-shaped steel bars are welded as a reinforcement cage protective layer.

[0024] The utility model does not need to be equipped with professional welders, and can be installed and used after the corresponding technical workers are briefed before the steel cage is hoisted. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a top view of the concrete pad of the utility model;

[0026] Figure 2 It is a front view of the concrete pad of the utility model;

[0027] Figure 3 This is a front view of the anti-dropout pin shaft of the utility model;

[0028] Figure 4 It is a rear view of the anti-dropout pin shaft of the utility model;

[0029] Figure 5 It is a left side view of the anti-dropout pin shaft of the utility model;

[0030] Figure 6 It is a dimension marking diagram of a top view of the concrete pad of the utility model;

[0031] Figure 7 It is a dimension marking diagram of the front view of the concrete pad of the utility model;

[0032] Figure 8 It is a dimension marking diagram of the front view of the anti-dropout pin shaft of the utility model;

[0033] Figure 9 It is a dimension marking diagram of the rear view of the anti-dropout pin shaft of the utility model;

[0034] Figure 10 It is a dimension marking diagram of the left view of the anti-dropout pin shaft of the utility model;

[0035] Reference numerals:

[0036] 1—Concrete pad,

[0037] 1.1—card slot, 1.2—rectangular opening,

[0038] 2—Anti-drop pin shaft,

[0039] 2.1 - Rectangular top plate, 2.2 - Clamping plate, 2.3 - Anti - detachment reverse hook, 2.4 - Arc - shaped plate, 2.5 - Vertical plate. Specific implementation manner

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0041] See Figures 1 to 5 As shown, a post - type cast - in - place pile steel cage protection layer control cushion block of the present invention is used for setting the protection layer of the cast - in - place pile steel cage, and includes a concrete cushion block 1 and an anti - detachment pin shaft 2 that fits and engages within the concrete cushion block 1.

[0042] The concrete cushion block 1 is a round cake - shaped structure with a hollow center. A groove 1.1 with the same - center diameter is opened from the center to the edge. A pair of rectangular openings 1.2 are opened on both sides of the groove, near the center position; the thickness of the concrete cushion block 1 is not less than 25 mm, the diameter is twice the thickness of the steel cage protection layer, and the diameter of the hollow part in the center is 4 mm larger than the diameter of the reinforcing bar at the installation position; the strength of the concrete cushion block 1 is greater than or equal to the strength of the pile body concrete.

[0043] The diameter of the concrete cushion block 1 is 120 mm, the radius of the hollow part in the center is 13 mm, the width of the rectangular opening 1.2 is 15 mm, and the distance between the pair of rectangular openings 1.2 is 32 mm.

[0044] The anti - detachment pin shaft 2 is in an overall "T" shape, and includes a rectangular top plate 2.1. A pair of clamping plates 2.2 are provided on the left and right sides of the lower surface of the rectangular top plate. The clamping plates 2.2 are indented inward along the left and right edges of the rectangular top plate to form clamping edges, and the length of the clamping edges is 4 mm. The lower part of the clamping plate is provided with an anti - detachment reverse hook 2.3, and the anti - detachment reverse hook 2.3 is arranged outward. An arc - shaped plate 2.4 is provided on the front side of the rectangular top plate, and a vertical plate 2.5 is provided on the rear side of the lower surface of the rectangular top plate; the planar size of the anti - detachment pin shaft 2 matches the rectangular opening, and the length is slightly longer than the thickness of the concrete cushion block 1; the anti - detachment pin shaft 2 is made of plastic material or metal material.

[0045] The anti - detachment pin shaft 2 has a length of 40 mm, a width of 14 mm, and a height of 28 mm; the rectangular top plate 2.1 has a length of 40 mm and a width of 14 mm; the width of the clamping plate 2.2 is 13 mm and the height is 28 mm, and the length of the anti - detachment reverse hook 2.3 is 5 mm; the width of the arc - shaped plate 2.4 is 26 mm and the radius of the curved surface is 13 mm; the width of the vertical plate 2.5 is 32 mm.

[0046] A pair of clamping plates 2.2 are fitted and clamped within the rectangular opening 1.2, and the clamping edges of the rectangular top plate 2.1 are clamped on the upper surface of the concrete cushion block 1, while the anti-detachment reverse hooks 2.3 are clamped on the lower surface of the concrete cushion block 1, and the circular arc plate 2.4 is hollowed out towards the center of the circle.

[0047] The utility model mainly consists of the following parts:

[0048] The utility model mainly consists of a concrete protection layer cushion block round cake with an opening and a "T"-shaped anti-detachment plastic pin; a rectangular opening is provided at the opening of the round cake, which is matched with the size of the plastic pin.

[0049] ① Concrete cushion block part: The main part of the cushion block is a concrete round cake with a thickness of not less than 25 mm and a diameter twice that of the steel cage protection layer thickness; the center position is hollowed out (the diameter is 4 mm larger than the diameter of the reinforcement bar to be installed at the subsequent position), and there is a concentric circular groove with the same diameter from the center to the edge part. A rectangular opening slightly larger than the concentric circle diameter and matched with the pin is provided near the center position; for specific dimensions, please refer to the appendix Figure 5 。

[0050] ② Anti-detachment pin part: The plane size of the pin is matched with the rectangular opening, and the length is slightly longer than the thickness of the concrete round cake; the pin is mainly in a "T" shape, with an anti-detachment reverse hook at the lower part. One side of the side is in a circular arc shape to closely fit with the reinforcement bar at the hollowed-out position of the center of the circle, and the other side is perpendicular; the "T"-shaped anti-detachment pin can be made of plastic material with good strength and stiffness, or can be made of metal material; for specific dimensions, please refer to the appendix Figure 6 。

[0051] ③ The strength of the concrete cushion block is greater than or equal to the pile body strength of the engineering pile at the using part; the concrete cushion block is matched with the anti-detachment pin. During installation, align the opening position of the concrete cushion block with the reinforcement bar or spiral stirrup at the installation part, so that the reinforcement bar at the installation position is closely attached to the bottom of the opening of the concrete cushion block, and then insert the anti-detachment pin to complete the installation.

[0052] This patent mainly consists of two parts: an open concrete protection layer cushion block round cake + an anti-detachment pin, which is a post-installed type cast-in-place pile steel cage protection layer control cushion block. After the steel cage is processed, align the opening position of the concrete cushion block with the reinforcement bar or spiral stirrup at the installation part, so that the reinforcement bar at the installation position is closely attached to the bottom of the opening of the concrete cushion block, and then insert the anti-detachment pin to complete the installation; it is used to replace the traditional method of welding protection layer steel bars on the main reinforcement of the steel cage, and plays the role of preventing the steel cage from exposing the reinforcement.

[0053] The utility model is a post-installed type cast-in-place pile concrete protection layer cushion block, which is applicable to the protection layer setting of the cast-in-place pile steel cage; from the information that has been published so far, no similar patent to the utility model has been found.

[0054] Traditional construction methods and problems: Traditional "U"-shaped steel bar welding as a protective layer of the steel cage needs to be welded, and the utility model directly adopts the form of finished concrete protective layer pads + pins for installation; the traditional steel cage protective layer is to weld "U"-shaped steel bars corresponding to the "designed protective layer thickness" on the four main bars of the steel cage as the protective layer of the steel cage, which has a lot of welding, high requirements for operators, burns of main bars, and the risk of welding leakage. The reinforced concrete protective layer of the bored pile is an important factor related to the mechanical properties and service life of the bored pile; at present, the bored pile steel cage welds "U"-shaped steel bars corresponding to the "designed protective layer thickness" on the four main bars of the steel cage as the protective layer of the steel cage, that is, the protective layer steel bars are installed simultaneously during the processing of the steel cage; this method not only wastes steel bars, but also has a large amount of welding between the main bars and the "U"-shaped protective layer steel bars, and the welding quality is difficult to guarantee. Improper welding will cause the main bars to burn. In addition, there are a large number of protective layer steel bar welding leaks in actual implementation on site; in summary, the traditional method of welding "U"-shaped steel bars has an adverse effect on the overall construction quality of the bored pile.

[0055] The working process of this utility model:

[0056] 1. This utility model can be mass-produced after the thickness of the engineering pile protection layer, the concrete strength, the reinforced steel bars, and the diameter of the spiral stirrups are determined, and the requirements for on-site workers are relatively low. After normal briefing, it can be produced and implemented;

[0057] 2 The thickness and strength of the protective layer pad shall be determined according to the actual situation on site; however, the strength of the protective layer pad shall be greater than or equal to the concrete strength of the pile body, and the thickness of the protective layer pad shall not be less than 25mm to avoid the protective layer pad from breaking during the hoisting and lowering of the steel cage, thereby affecting the overall quality of the pile body;

[0058] 3 After the processing of the steel cage of the bored pile is completed, before lifting, the finished protective layer pad is set at the position where the protective layer steel bars are originally to be set in the steel cage of the bored pile; only the bottom of the groove of the concrete round cake opening needs to be fitted with the spiral stirrups, and then the rectangular pin is inserted into the reserved bayonet position to complete the installation of the pad.

[0059] 4 When protective layer pads of the finished steel cage appear during the lifting process, wire ties can be used to assist in fixing them.

[0060] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0061] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A post - placed cast - in - place pile steel cage protection layer control cushion block, characterized in that: For the protection layer setting of the steel cage of cast-in-place piles, it includes concrete pads (1) and anti-detachment pin shafts (2) that fit and engage within the concrete pads (1); The concrete pads (1) are in a round cake shape with a hollow center. A card slot (1.1) with the same center diameter is opened from the center to the edge part. A pair of rectangular openings (1.2) are opened on both sides of the card slot, near the center position; The thickness of the concrete pads (1) is not less than 25 mm, the diameter is twice the thickness of the steel cage protection layer, and the diameter of the hollow part in the center is larger than the diameter of the reinforcement bar at the installation position; The anti-detachment pin shaft (2) is in an overall "T" shape, including a rectangular top plate (2.1). A pair of clamping plates (2.2) are provided on the left and right sides of the lower surface of the rectangular top plate. The clamping plates (2.2) are indented inward along the left and right edges of the rectangular top plate to form clamping edges, and the length of the clamping edges is 4 mm. The lower part of the clamping plate is provided with an anti-detachment reverse hook (2.3), and the anti-detachment reverse hook (2.3) is set outward. An arc-shaped plate (2.4) is provided on the front side of the rectangular top plate, and a vertical plate (2.5) is provided on the rear side of the lower surface of the rectangular top plate; A pair of clamping plates (2.2) fit and engage within the rectangular openings (1.2), and the rectangular top plate (2.1) is clamped on the upper surface of the concrete pad (1), the anti-detachment reverse hook (2.3) is clamped on the lower surface of the concrete pad (1), and the arc-shaped plate (2.4) faces the hollow center.

2. The post - cast - in - place pile reinforcement cage protection layer control cushion block according to claim 1, wherein: The planar size of the anti-detachment pin shaft (2) matches the rectangular opening, and the length is slightly longer than the thickness of the concrete pad (1).

3. The post - cast - in - place pile steel cage protection layer control cushion block according to claim 1, wherein: The diameter of the hollow part in the center of the concrete pad (1) is 4 mm larger than the diameter of the reinforcement bar at the installation position.

4. The post - cast - in - place pile steel cage protective layer control cushion block according to claim 1, characterized in that: The anti-detachment pin shaft (2) is made of plastic material or metal material.

5. The post - placed cast - in - situ pile reinforcement cage protection layer control cushion block according to claim 1, characterized in that: The strength of the concrete pad (1) is greater than or equal to the strength of the pile body concrete.

6. The post - cast - in - place pile steel cage protection layer control cushion block according to claim 1, characterized in that: The diameter of the concrete pad (1) is 120 mm, the radius of the hollow part in the center is 13 mm, the width of the rectangular opening (1.2) is 15 mm, and the distance between a pair of rectangular openings (1.2) is 32 mm.

7. The post - cast - in - place pile steel cage protection layer control cushion block according to claim 1, characterized in that: The length of the anti-detachment pin shaft (2) is 40 mm, the width is 14 mm, and the height is 28 mm; The length of the rectangular top plate (2.1) is 40 mm, and the width is 14 mm; The width of the clamping plate (2.2) is 13 mm, the height is 28 mm, and the length of the anti-detachment reverse hook (2.3) is 5 mm; The width of the arc-shaped plate (2.4) is 26 mm, and the radius of the curved surface is 13 mm; The width of the vertical plate (2.5) is 32 mm.

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