Pile and raft plate connecting node structure with waterproof and vibration reduction dual functions

Abstract

The utility model discloses a pile and raft plate connection node structure with waterproof and vibration reduction functions, which comprises two waterproof layers, the first waterproof layer (3) covers the surface of a concrete cushion layer (1) and the surface of a pile head (2), and the first waterproof layer (3) in the area of the concrete cushion layer (1) is covered with a second waterproof layer (5); a fine aggregate concrete protection layer (6) is poured on the second waterproof layer (5); the polymer cement mortar layer (4) is constructed on the basis of the first waterproof layer (3) in the area where the pile head (2) is located, the vibration reduction layer (7) is tightly attached to the surface of the fine aggregate concrete protection layer (6) and the surface of the polymer cement mortar layer (4), and the raft plate (11) is located on the vibration reduction layer (7). The technical problem that an existing pile-raft connecting joint is poor in waterproof and vibration reduction dual effect is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, in particular to a pile-raft connection node structure with waterproof and vibration reduction functions. Background Art

[0002] In order to reduce the vibration problems caused by rail transit, vibration control is currently mainly carried out from three aspects: vibration source reduction, transmission path reduction and vibration reduction of the vibrated body. For vibration reduction of the vibrated body, specific control measures include vibration isolation supports and vibration reduction pads. Among them, vibration reduction pads have the advantages of large vertical bearing capacity, significant reduction of vertical stiffness of the superstructure and convenient construction, which provides a basis for their application in actual engineering.

[0003] Among the foundation forms of elevated subway station buildings, the pile-raft foundation form is more commonly used. When vibration reduction measures are taken for the building foundation, the vibration reduction of the pile-raft foundation will play a vital role. The use of vibration reduction pads to isolate the piles from the raft and cut off the vibration propagation path can achieve a significant vibration reduction effect. However, the pile-raft connection node with waterproof function is required to have a vibration reduction effect at the same time. The vibration reduction pad is difficult to lay continuously and closed, the integrity is not strong, and the node detail processing and construction are difficult. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide a pile and raft connection node structure with dual functions of waterproofing and vibration reduction, ensuring the integrity of the pile foundation and the raft, having the advantages of simple structure and convenient construction, and solving the technical problem that the existing pile-raft connection nodes have poor dual effects of waterproofing and vibration reduction.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A pile and raft connection node structure with dual functions of waterproofing and vibration reduction, arranged between the pile head and the raft, characterized in that:

[0007] It includes two waterproof layers, wherein the first waterproof layer covers the surface of the concrete cushion layer and the surface of the pile head, and the second waterproof layer covers the first waterproof layer in the concrete cushion layer area; a fine stone concrete protective layer is poured on the second waterproof layer;

[0008] Construct a polymer cement mortar layer on the basis of the first waterproof layer in the area where the pile head is located to prevent the first waterproof layer from being damaged due to subsequent construction;

[0009] The vibration reduction layer is closely attached to the surface of the fine stone concrete protective layer and the surface of the polymer cement mortar layer, and the raft plate is located on the vibration reduction layer.

[0010] In the above scheme, the pile foundation stress reinforcement extends from the pile head into the raft slab to connect the pile foundation and the raft slab.

[0011] In the above scheme, a plurality of pile foundation stress-bearing bars are distributed on the raft slab.

[0012] In the above scheme, a plurality of pile foundation stress-bearing bars are evenly distributed on the raft slab in a circle around the central axis of the pile head.

[0013] In the above scheme, the connection between the pile foundation stress reinforcement and the vibration reduction layer polymer cement mortar layer is sealed by a water stop glue.

[0014] In the above scheme, the joints of the vibration reduction layer at the vertical projection of the pile head are sealed with waterproof tape.

[0015] In the above scheme, sealant is used to caulk the joints between the second waterproof layer and the polymer cement mortar layer outside the pile head.

[0016] In the above scheme, the first waterproof layer is a cement-based penetrating crystalline waterproof coating, and the second waterproof layer is a self-adhesive polymer modified asphalt waterproof membrane.

[0017] In the above solution, the vibration reduction layer is a vibration reduction pad made of polyurethane elastic material.

[0018] In the above scheme, the water-stopping adhesive is a polyurethane water-swelling water-stopping adhesive, and the sealant is a weather-resistant polyurethane sealant.

[0019] In the above solution, the vibration reduction layer is used to reduce the vibration transmission between the pile head and the upper raft slab, and the pile foundation stress reinforcement extends into the raft slab to ensure the integrity of the pile foundation and the raft slab.

[0020] In the above scheme, the polymer cement mortar layer is used to protect the first waterproof layer and prevent the first waterproof layer from being damaged during the construction of the vibration reduction layer.

[0021] In the above solution, the vibration reduction layer is in close contact with the surface of the polymer cement mortar layer applied on the pile head, and the vibration reduction layer is in close contact with the bottom of the raft slab.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The pile-raft connection node in the utility model has the dual functions of waterproofing and vibration reduction. The two waterproof layers ensure the waterproof effect of the pile head and the concrete cushion layer. The continuous and closed vibration reduction layer placed on the upper part of the waterproof layer isolates the pile from the raft, blocking the vibration propagation path, and reducing the adverse effects of the vibration generated by the rail transit operation on the secondary vibration of the building and the comfort of personnel.

[0024] The pile foundation stress reinforcement in the utility model extends into the raft slab. Compared with the spring-type vibration reduction device arranged at the pile head position, the pile foundation stress reinforcement is not completely disconnected from the upper raft slab, thereby ensuring the integrity of the pile foundation and the raft slab, reducing lateral displacement and improving the safety of the building foundation.

[0025] The vibration-damping pad in the utility model needs to be perforated at the position of the pile foundation reinforcement, which is one of the weak points of the waterproofing of the pile-raft slab connection node. The reinforcement position at the top of the pile head on the upper part of the vibration-damping pad is filled with water-stop glue. The polymer cement mortar at the lower part of the vibration-damping pad protects the first waterproof layer from being damaged during the construction of the vibration-damping layer, thereby jointly ensuring the waterproofing effect of the pile-raft slab connection node.

[0026] The pile-raft connection node proposed in the utility model has a simple structure, convenient construction and good engineering application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 The utility model is a schematic diagram of a pile and raft connection node structure with dual functions of waterproofing and vibration reduction.

[0029] Figure 2 for Figure 1 A is a schematic diagram of a local enlarged structure.

[0030] Figure 3 It is a layered plan view of a pile and raft connection node with dual functions of waterproofing and vibration reduction according to the utility model.

[0031] Figure 4 This is an isometric stereoscopic diagram of a pile and raft connection node structure with dual functions of waterproofing and vibration reduction according to the utility model (the raft is not shown).

[0032] In the figure: 1 is a concrete cushion layer; 2 is a pile head; 3 is a first waterproof layer; 4 is a polymer cement mortar layer; 5 is a second waterproof layer; 6 is a fine stone concrete protective layer; 7 is a vibration reduction layer; 8 is a waterproof tape; 9 is a water-stopping glue; 10 is a sealant; 11 is a raft plate; and 12 is a pile foundation reinforcement. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0041] Example 1

[0042] like Figure 1-4 As shown, the utility model is a pile and raft connection node structure with dual functions of waterproofing and vibration reduction, including a concrete cushion layer 1, a pile head 2, a first waterproof layer 3, a polymer cement mortar layer 4, a second waterproof layer 5, a fine stone concrete protective layer 6, a vibration reduction layer 7, a waterproof tape 8, a water stop glue 9, a sealant 10, a raft 11 and pile foundation tension bars 12.

[0043] The first waterproof layer 3 is covered on the pile head 2. The first waterproof layer 3 extends from the pile head 2 to the concrete cushion layer 1 near the pile head 2, and then the pile head 2 and the joint between the pile head 2 and the concrete cushion layer 1 are waterproofed. A polymer cement mortar layer 4 is constructed on the basis of the first waterproof layer 3 covering the pile head 2. The polymer cement mortar layer 4 not only protects the first waterproof layer 3, but also avoids damage to the first waterproof layer 3 when the vibration reduction layer 7 is subsequently set. A second waterproof layer 5 is constructed on the concrete cushion layer 1. The second waterproof layer 5 covers the concrete cushion layer 1 as a whole, and covers the first waterproof layer 3 near the pile head 2, providing further waterproof protection for the part. A fine stone concrete protective layer 6 is poured on the second waterproof layer 5. On the one hand, it protects the second waterproof layer 5, and on the other hand, it facilitates the installation of the vibration reduction layer 7. A vibration reduction layer 7 is constructed on the fine stone concrete protective layer 6 and the polymer cement mortar layer 4. Finally, the raft 11 is arranged on the upper part of the vibration reduction layer 7, and the vibration reduction effect of the pile-raft foundation is realized through the vibration reduction layer 7. The pile foundation stress reinforcement 12 passes through the first waterproof layer 3, the polymer cement mortar layer 4 and the vibration reduction layer 7 from bottom to top, and is anchored into the raft 11, thereby ensuring the integrity of the pile-raft foundation.

[0044] In order to further improve the waterproof effect of the pile-raft connection node, additional waterproof reinforcement is required at the joints, junctions and corners. The corners where the second waterproof layer 5 and the polymer cement mortar layer 4 are combined are caulked with sealant 10, the joints of the vibration reduction layer 7 are sealed with waterproof tape 8, and the gaps between the vibration reduction layer 7 and the pile foundation reinforcement 12 at the pile head 2 are sealed by pouring water-stopping glue 9.

[0045] The vibration-damping layer 7 is laid on the fine stone concrete protective layer 6 and glued to the polymer cement mortar layer 4. Therefore, the vibration-damping layer 7 avoids being glued and fixed to the waterproof layer through the above measures, thereby reducing the damage to the waterproof layer when the vibration-damping layer 7 is fixed.

[0046] The vibration reduction layer 7 is in close contact with the surface of the polymer cement mortar layer 4 applied on the pile head 2 , and the vibration reduction layer 7 is in close contact with the bottom of the raft 11 .

[0047] The first waterproof layer 3 is a cement-based penetrating crystalline waterproof coating, the second waterproof layer 5 is a self-adhesive polymer modified asphalt waterproof membrane, the vibration reduction layer 7 is a vibration reduction pad made of polyurethane elastic material, the water stop glue 9 is a polyurethane water-swellable water stop glue, and the sealant 10 is a weather-resistant polyurethane sealant.

[0048] The above-mentioned pile and raft connection node structure with dual functions of waterproofing and vibration reduction is formed according to the following construction steps:

[0049] Step 1: construct a cast-in-place pile foundation and reserve stress reinforcement, the pile head 2 is higher than the bottom of the foundation, and the upper part of the reserved stress reinforcement 12 in the pile head 2 extends out of the pile head 2;

[0050] Step 2: pouring a concrete cushion layer 1 around the pile head 2 as a paving surface for the first waterproof layer 3;

[0051] Step 3: Set the first waterproof layer 3 to completely cover and wrap the pile head 2. The pile foundation force reinforcement 12 passes through the first waterproof layer 3. The first waterproof layer 3 extends from the pile head 2 to the concrete cushion layer 1 around the pile head 2. Then, waterproof treatment is performed on the connection between the pile head 2 and the pile head 2 and the concrete cushion layer 1.

[0052] Step 4: On the basis of the first waterproof layer 3 covering the pile head 2, a polymer cement mortar layer 4 is constructed. On the basis of the first waterproof layer 3 of the concrete cushion layer 1, a second waterproof layer 5 is constructed. The second waterproof layer 5 is fully laid to cover the entire concrete cushion layer 1. The inner corner where the second waterproof layer 5 and the polymer cement mortar layer 4 meet is caulked with a sealant 10;

[0053] Step 5: pouring a fine stone concrete protective layer 6 on the second waterproof layer 5 within the concrete cushion layer 1, which protects the second waterproof layer 5 on the one hand and facilitates the laying of the vibration reduction layer 7 on the other hand;

[0054] Step 6: Lay the vibration reduction layer 7 on the fine stone concrete protective layer 6 and the polymer cement mortar layer 4. The joints of the vibration reduction layer 7 are sealed with waterproof tape 8, and the gaps between the vibration reduction layer 7 and the holes of the pile foundation reinforcement 12 at the pile head 2 are sealed with injected water stop glue 9;

[0055] Step 7: On the upper part of the vibration reduction layer 7, the raft 11 foundation is cast, and the pile foundation force bars 12 of the pile head 2 extend into the raft 11 foundation, and the two together form a pile-raft connection node with dual functions of waterproofing and vibration reduction.

[0056] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A pile and raft connection node structure having both waterproof and vibration reduction functions, arranged between a pile head (2) and a raft (11), characterized in that: It comprises two waterproof layers, wherein a first waterproof layer (3) covers the surface of a concrete cushion layer (1) and the surface of a pile head (2), and a second waterproof layer (5) covers the first waterproof layer (3) in the area of ​​the concrete cushion layer (1); and a fine stone concrete protective layer (6) is poured on the second waterproof layer (5); A polymer cement mortar layer (4) is constructed on the foundation of the first waterproof layer (3) in the area where the pile head (2) is located; The vibration reduction layer (7) is closely attached to the surface of the fine stone concrete protective layer (6) and the surface of the polymer cement mortar layer (4), and the raft (11) is located on the vibration reduction layer (7); Each joint of the vibration reduction layer (7) and each joint of the second waterproof layer (5) are sealed.

2. The pile and raft connection node structure with dual functions of waterproofing and vibration reduction according to claim 1 is characterized in that: The pile foundation stress reinforcement (12) extends from the pile head (2) into the raft slab (11) to connect the pile foundation and the raft slab (11).

3. The pile and raft connection node structure with dual functions of waterproofing and vibration reduction according to claim 1 is characterized in that: A plurality of pile foundation force bars (12) are distributed on the raft slab (11).

4. The pile and raft connection node structure with dual functions of waterproofing and vibration reduction according to claim 1 is characterized in that: A plurality of pile foundation stress reinforcement bars (12) are evenly spaced and distributed on the raft slab (11) in a circular pattern around the central axis of the pile head (2).

5. The pile and raft connection node structure with dual functions of waterproofing and vibration reduction according to any one of claims 2 to 4, characterized in that: The connection between the pile foundation stress reinforcement (12) and the polymer cement mortar layer (4) of the vibration reduction layer (7) is sealed by a water stop glue (9).

6. The pile and raft connection node structure with dual functions of waterproofing and vibration reduction according to claim 1 is characterized in that: The joints of the vibration reduction layer at the vertical projection of the pile head (2) are sealed by a waterproof tape (8).

7. The pile and raft connection node structure with dual functions of waterproofing and vibration reduction according to claim 1 is characterized in that: The joint between the second waterproof layer (5) and the polymer cement mortar layer (4) outside the pile head (2) is caulked with a sealant (10).

8. The pile and raft connection node structure with dual functions of waterproofing and vibration reduction according to claim 1 is characterized in that: The first waterproof layer (3) is a cement-based penetrating crystalline waterproof coating, and the second waterproof layer (5) is a self-adhesive polymer-modified asphalt waterproof membrane.

9. The pile and raft connection node structure with dual functions of waterproofing and vibration reduction according to claim 1 is characterized in that: The vibration reduction layer (7) is a vibration reduction pad made of polyurethane elastic material.

10. The pile and raft connection node structure with dual functions of waterproofing and vibration reduction according to claim 5, characterized in that: The water-stop glue (9) is a polyurethane water-swellable water-stop glue.

11. The pile and raft connection node structure with dual functions of waterproofing and vibration reduction according to claim 7 is characterized in that: The sealant (10) is a weather-resistant polyurethane sealant.

Images