Expanded pile head vibration reduction structure with staggered slab vibration reduction structure

Abstract

The utility model provides an expanded pile head vibration reduction structure with a slab staggering vibration reduction structure, and belongs to the technical field of construction engineering vibration control. Comprising a pile body lower longitudinal bar assembly, and the upper portion of the pile body lower longitudinal bar assembly is connected with an expanding pile head; the expanding pile head comprises a steel sleeve, a lower-end steel plate is fixed in the steel sleeve, and the upper end of the pile body lower longitudinal bar assembly is fixedly connected with the steel sleeve and the lower-end steel plate; a plurality of stiffening plates are uniformly distributed and connected to the circumference of the outer circular surface of the steel sleeve, and a plurality of pile head expanding additional longitudinal bars are uniformly distributed and fixed on each stiffening plate; vibration reduction pads are laid on the upper surface of the lower end steel plate, the inner side surface of the steel sleeve and the upper surface of the expanded pile head to form a staggered slab vibration reduction structure, and a pile body upper longitudinal bar assembly is installed on the upper portion of the lower end steel plate. The utility model is suitable for a vibration reduction structure of a pile head in building pile foundation types, and for pile foundations such as piled rafts and the like, under the condition that the vertical vibration isolation requirement of an upper building is met, the anti-pulling requirement of the pile can be met, and meanwhile, the requirement of the pile top for resisting horizontal force can also be met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of building engineering vibration control technology, more particularly to a kind of enlarged pile head damping structure with staggered platform damping structure. BACKGROUND

[0002] With the rapid development of urban rail transit, on the one hand, urban rail transit brings great convenience for people's traffic travel. On the other hand, with the densification development of rail transit lines, and people's growing attention to the environment, other environmental vibrations such as transportation facilities have a great impact on sensitive buildings within a certain range. For the existing building foundation damping pad damping technology, the polyurethane / rubber damping pad on the market is only suitable for raft foundation; for pile raft and other pile foundation types, on the one hand, due to the super large pile top pressure, there is no damping pad product suitable for super large load on the market; on the other hand, if the damping pad is forced to be laid on the pile top to separate the pile foundation, it will change the stress mode of the pile top, or it is not suitable for pile foundation with uplift and horizontal force requirements. In order to solve the above problems, therefore, it is necessary to propose a damping structure of enlarged pile head. SUMMARY

[0003] The technical problem solved by the utility model: provide a kind of enlarged pile head damping structure with staggered platform damping structure, the purpose is to be suitable for the whole damping control of building foundation of pile raft and other pile foundation types.

[0004] To achieve the above purpose, the utility model adopts the technical scheme of:

[0005] The enlarged pile head damping structure with staggered platform damping structure comprises a pile body lower longitudinal reinforcement assembly, the pile body lower longitudinal reinforcement assembly is connected to the upper part of the enlarged pile head; the enlarged pile head comprises a steel sleeve, a lower end steel plate is fixed inside the steel sleeve, the upper end of the pile body lower longitudinal reinforcement assembly is fixedly connected with the steel sleeve and the lower end steel plate; a plurality of stiffeners are connected on the outer circular surface of the steel sleeve in a circumferential manner, a plurality of additional longitudinal reinforcements of the enlarged pile head are fixed on each stiffener in a circumferential manner; the upper surface of the lower end steel plate, the inner surface of the steel sleeve and the upper surface of the enlarged pile head are all paved with damping pads to form a staggered damping structure, the pile body upper longitudinal reinforcement assembly is installed on the upper part of the lower end steel plate, and the lower end of the pile body upper longitudinal reinforcement assembly is inserted into the steel sleeve and supported on the lower end steel plate.

[0006] Further limit to the above scheme, the damping pad comprises a pile body upper horizontal damping pad paved on the upper surface of the lower end steel plate, a pile body upper steel sleeve inner side damping pad paved on the inner side surface of the steel sleeve and an enlarged pile head horizontal damping pad paved on the upper surface of the enlarged pile head, and the pile body upper horizontal damping pad and the enlarged pile head horizontal damping pad form a staggered damping structure through a stepped structure.

[0007] Further, the reinforcing plates are radially arranged on the outer surface of the steel sleeve and are fixedly connected to the steel sleeve by welding.

[0008] Further, the pile lower longitudinal reinforcement assembly comprises a pile lower longitudinal reinforcement and a pile lower stirrup, the pile lower longitudinal reinforcement is bound by the pile lower stirrup, and the upper end of the pile lower longitudinal reinforcement is fixedly connected to the inner wall of the steel sleeve and the lower end steel plate by welding.

[0009] Further, the pile upper longitudinal reinforcement assembly comprises a pile upper longitudinal reinforcement and a pile upper stirrup, the pile upper longitudinal reinforcement is bound by the pile upper stirrup, and the lower end of the pile upper longitudinal reinforcement is fixedly connected to the upper end steel plate by welding.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] 1. The damping structure of the pile head is suitable for the pile head of the building pile foundation type, can meet the requirements of the vertical vibration isolation of the upper building, the anti-pulling requirement of the pile, and the horizontal force requirement of the pile top, and is simple in structure, convenient in construction, and has wide engineering application prospect.

[0012] 2. The damping structure of the pile head can effectively increase the effective pressure bearing area of the damping pad of the pile head, so that the damping pad can reach the working load range corresponding to the damping performance.

[0013] 3. The damping structure of the pile head can make the damping pad completely bear the vertical pressure, so as to effectively control the vertical vibration.

[0014] 4. The damping structure of the pile head can make the pile head suitable for the pile foundation with the anti-pulling requirement by expanding the additional longitudinal reinforcement of the pile head and the welding of the reinforcing plate, and welding the pile lower longitudinal reinforcement and the inner side of the steel sleeve.

[0015] 5. The damping structure of the pile head can make the damping pad arranged between the pile head and the raft / slab form a staggered structure, and the diameter of the pile head is expanded, so that the pile top position can resist a larger horizontal force. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following briefly introduces the drawings needed in the description of the technical scheme of the embodiments. Those skilled in the art should understand that the drawings are not drawn according to scale, and are only for illustrative purposes. The following takes an enlarged pile head as an example.

[0017] Figure 1 It is a schematic view of a damping structure of an enlarged pile head.

[0018] Figure 2 It is a kind of enlarged pile head damping structure node large sample schematic diagram;

[0019] Figure 3 It is a kind of enlarged pile head damping structure node plane schematic diagram;

[0020] Figure 4 It is a kind of enlarged pile head damping structure node construction step flow chart.

[0021] In the figure: 1 is the lower longitudinal reinforcement assembly of the pile body, 1-1 is the lower longitudinal reinforcement of the pile body, 1-2 is the lower stirrup of the pile body, 2 is the enlarged pile head, 2-1 is the lower end steel plate, 2-2 is the steel sleeve, 2-3 is the additional longitudinal reinforcement of the enlarged pile head, 2-4 is the stiffening plate, 3 is the damping pad, 3-1 is the upper horizontal damping pad of the pile body, 3-2 is the inner side damping pad of the upper steel sleeve of the pile body, 3-3 is the horizontal damping pad of the enlarged pile head, 4 is the raft / slab, 5 is the upper longitudinal reinforcement assembly of the pile body, 5-1 is the upper longitudinal reinforcement of the pile body, 5-2 is the upper stirrup of the pile body, 5-3 is the upper end steel plate, 6 is the waterproof layer, and 7 is the cushion layer. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0024] It should be noted that in this paper, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations. The element defined by the sentence "including a......" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0025] Please refer to Figures 1-4 for detailed description of the embodiments of the present application.

[0026] Embodiment: the enlarged pile head damping structure with staggered damping structure, please refer to Figures 1-3 , including pile lower longitudinal reinforcement assembly 1, the upper part of the pile lower longitudinal reinforcement assembly 1 is connected with the enlarged pile head 2, the enlarged pile head 2 includes steel sleeve 2-2, the inside of the steel sleeve 2-2 is fixed with lower end steel plate 2-1, the upper end of the pile lower longitudinal reinforcement assembly 1 is fixedly connected with the steel sleeve 2-2 and the lower end steel plate 2-1, the outer circular surface of the steel sleeve 2-2 is circumferentially connected with a plurality of stiffeners 2-4, each of the stiffeners 2-4 is circumferentially fixed with a plurality of additional longitudinal reinforcement 2-3 of the enlarged pile head, the upper surface of the lower end steel plate 2-1, the inner surface of the steel sleeve 2-2 and the upper surface of the enlarged pile head 2 are laid with damping pad 3 and form staggered damping structure, the upper part of the lower end steel plate 2-1 is installed with pile upper longitudinal reinforcement assembly 5, the lower end of the pile upper longitudinal reinforcement assembly 5 is inserted into the steel sleeve 2-2 and supported on the lower end steel plate 2-1.

[0027] In a specific embodiment: the damping pad 3 includes pile upper horizontal damping pad 3-1 laid on the upper surface of the lower end steel plate 2-1, pile upper steel sleeve inner side damping pad 3-2 laid on the inner surface of the steel sleeve 2-2 and enlarged pile head horizontal damping pad 3-3 laid on the upper surface of the enlarged pile head 2, the pile upper horizontal damping pad 3-1 and the enlarged pile head horizontal damping pad 3-3 form staggered damping structure through the stepped structure.

[0028] Preferably, the damping pad is made of polyurethane / rubber material.

[0029] In a specific embodiment: the plurality of stiffeners 2-4 are radially arranged on the outer circular surface of the steel sleeve 2-2, and are circumferentially distributed, the stiffeners 2-4 are fixedly connected with the steel sleeve 2-2 by welding.

[0030] In a specific embodiment: the pile lower longitudinal reinforcement assembly 1 includes pile lower longitudinal reinforcement 1-1 and pile lower stirrup 1-2, the pile lower longitudinal reinforcement 1-1 is bound in a winding manner by the pile lower stirrup 1-2, the upper end of the pile lower longitudinal reinforcement 1-1 is fixedly connected with the inner wall of the steel sleeve 2-2 and the lower end steel plate 2-1 by welding.

[0031] In a specific embodiment: the pile upper longitudinal reinforcement assembly 5 includes pile upper longitudinal reinforcement 5-1 and pile upper stirrup 5-2, the pile upper longitudinal reinforcement 5-1 is bound in a winding manner by the pile upper stirrup 5-2, the lower end of the pile upper longitudinal reinforcement 5-1 is fixedly connected with the upper end steel plate 5-3 by welding.

[0032] The technical scheme above enlarges the damping structure of the pile head, effectively increases the effective bearing area of the damping pad of the pile head, and thus makes the damping pad reach the working load range corresponding to the damping performance.

[0033] The technical scheme above enlarges the damping structure of the pile head, makes the damping pad bear the vertical pressure, and thus effectively controls the vertical vibration.

[0034] The technical scheme above enlarges the damping structure of the pile head, enlarges the welding between the additional longitudinal reinforcement of the pile head and the stiffening plate and the welding between the lower longitudinal reinforcement of the pile body and the inner side of the steel sleeve, and thus makes the enlarged pile head suitable for the pile foundation with the requirement of uplift resistance.

[0035] The technical scheme above enlarges the damping structure of the pile head, forms the staggered structure of the damping pad arranged between the enlarged pile head and the raft / slab, and thus reaches the position of the pile top capable of resisting the larger horizontal force through the diameter enlargement of the pile head.

[0036] A construction method of the damping structure of the enlarged pile head, referring to Figure 4 The construction method specifically comprises the following construction steps:

[0037] Step 1): binding the lower longitudinal reinforcement 1-1 and the lower hoop reinforcement 1-2 of the pile body and installing the steel sleeve 2-2;

[0038] Step 2): welding and connecting the lower longitudinal reinforcement 1-1 of the pile body and the inner wall of the steel sleeve 2-2;

[0039] Step 3): positioning the stiffening plate 2-4, and welding and connecting the stiffening plate 2-4 and the outer wall of the steel sleeve 2-2;

[0040] Step 4): welding and connecting the additional longitudinal reinforcement 2-3 of the enlarged pile head and the stiffening plate 2-4;

[0041] Step 5): welding the upper end steel plate 5-3, the upper longitudinal reinforcement 5-1 and the upper hoop reinforcement 5-2 of the pile body in advance in the site;

[0042] Step 6): pouring the concrete of the pile body and chiseling the pile head;

[0043] Step 7): welding and connecting the lower longitudinal reinforcement 1-1 of the lower pile body and the lower end steel plate 2-1;

[0044] Step 8): laying the upper horizontal damping pad 3-1 of the pile body, the inner side damping pad 3-2 of the upper steel sleeve of the pile body and the horizontal damping pad 3-3 of the enlarged pile head;

[0045] Step 9): installing the upper end steel plate 5-3, the upper longitudinal reinforcement 5-1 and the upper hoop reinforcement 5-2 welded in advance in step 5, so that the lower end of the upper longitudinal reinforcement assembly 5 of the pile body is inserted into the steel sleeve 2-2 and supported on the lower end steel plate 2-1;

[0046] Step 10): installing waterproof layer 6, cushion layer 7;

[0047] Step 11): pouring concrete to form raft / slab 4.

[0048] The utility model relates to a kind of vibration reduction structure suitable for pile head in building pile foundation type, for pile raft and other pile foundation types, under meeting the vertical vibration isolation requirements of upper building, also can meet the uplift resistance requirements of pile, while also meet the requirements of pile top horizontal force resistance.This pile head structure is simple, suitable for the overall vibration reduction measure of building foundation of pile raft and other pile foundation types, construction is convenient, engineering application prospect is broad.

[0049] The utility model content and the technical content not specifically described in the above embodiment are same as prior art.

[0050] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0051] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. An enlarged pile head vibration reduction structure with a staggered vibration reduction feature, characterized in that: The system includes a lower longitudinal reinforcement assembly (1) for the pile body, the upper part of which is connected to an enlarged pile head (2); the enlarged pile head (2) includes a steel sleeve (2-2), inside which a lower steel plate (2-1) is fixed; the upper end of the lower longitudinal reinforcement assembly (1) is fixedly connected to the steel sleeve (2-2) and the lower steel plate (2-1); several stiffening plates (2-4) are evenly distributed around the outer circumference of the steel sleeve (2-2), each... Multiple additional longitudinal reinforcement bars (2-3) for enlarged pile heads are evenly distributed and fixed on the stiffening plate (2-4); vibration damping pads (3) are laid on the upper surface of the lower end steel plate (2-1), the inner surface of the steel sleeve (2-2) and the upper surface of the enlarged pile head (2) to form a staggered vibration damping structure; the upper part of the pile body longitudinal reinforcement assembly (5) is installed on the upper part of the lower end steel plate (2-1), and the lower end of the pile body longitudinal reinforcement assembly (5) is inserted into the steel sleeve (2-2) and supported on the lower end steel plate (2-1).

2. The expanded pile head vibration reduction structure with staggered vibration reduction structure according to claim 1, characterized in that: The vibration damping pad (3) includes a horizontal vibration damping pad (3-1) on the upper surface of the lower steel plate (2-1), a vibration damping pad (3-2) on the inner surface of the steel sleeve (2-2) on the upper surface of the pile body, and a horizontal vibration damping pad (3-3) on the upper surface of the enlarged pile head (2). The horizontal vibration damping pad (3-1) on the upper surface of the pile body and the horizontal vibration damping pad (3-3) on the enlarged pile head form a staggered vibration damping structure through a stepped structure.

3. The expanded pile head vibration reduction structure with staggered vibration reduction structure according to claim 1, characterized in that: The stiffening plates (2-4) are arranged radially on the outer surface of the steel sleeve (2-2), are evenly distributed around the circumference, and are fixedly connected to the steel sleeve (2-2) by welding.

4. The expanded pile head vibration reduction structure with staggered vibration reduction structure according to claim 1, characterized in that: The lower longitudinal reinforcement assembly (1) of the pile body includes a lower longitudinal reinforcement (1-1) and a lower stirrup (1-2). The lower longitudinal reinforcement (1-1) is tied together with the lower stirrup (1-2). The upper end of the lower longitudinal reinforcement (1-1) is fixedly connected to the inner wall of the steel sleeve (2-2) and the lower end steel plate (2-1) by welding.

5. The expanded pile head vibration reduction structure with staggered vibration reduction structure according to claim 1, characterized in that: The upper longitudinal reinforcement assembly (5) of the pile body includes an upper longitudinal reinforcement (5-1) and an upper hoop (5-2). The upper longitudinal reinforcement (5-1) of the pile body is tied by the upper hoop (5-2). The lower end of the upper longitudinal reinforcement (5-1) of the pile body is fixedly connected to the upper steel plate (5-3) by welding.

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