Pile foundation waterproof structure and pile foundation structure

Abstract

The utility model provides a pile foundation waterproof structure and a pile foundation structure, the pile foundation waterproof structure comprises a cushion layer, the cushion layer is arranged on the outer side of a reinforced concrete cast-in-place pile and is connected with a reinforced concrete bearing platform; micro-expansive cement, polysulfide caulking paste and micro-expansive concrete are sequentially arranged between the cushion layer and the reinforced concrete cast-in-place piles from bottom to top, and a three-layer waterproof structure is formed. The upper end of the reinforced concrete cast-in-place pile is sleeved with a waterproof steel sleeve, so that the problems that when a pile head adopts a slow-expansion rainwater rubber strip and polysulfide caulking paste as waterproof materials, the pile head is difficult to fix around the pile, and a reinforced concrete bearing platform is difficult to construct and pour are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pile foundation construction, and specifically relates to a pile foundation waterproof structure and a pile foundation structure. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] When constructing structures in places with poor foundation bearing capacity, pile foundations are often used for treatment. In areas with high groundwater levels, especially those with corrosive water to concrete and steel bars, water seepage channels are easily formed between the pile head and the pedestal, affecting the durability of the pile foundation pedestal. The traditional method is to install a waterproof device between the pile head and the pedestal bottom plate.

[0004] The traditional process is to chisel a groove of a certain area on the cushion layer around the pile, install a slow-expansion water-swelling rubber strip in the groove; set a circle of polysulfide caulking paste on the expansion strip along the four sides of the pile; and pour the concrete cap.

[0005] However, this method has certain disadvantages: (1) The slow-expanding water-swelling rubber strip is not tightly bonded to the pile surface; (2) The polysulfide caulking paste is not firmly bonded around the pile; (3) When the concrete is poured on the base, the polysulfide caulking paste is easily disturbed, resulting in gaps with the pile surface, which is difficult to control during construction; (4) The labor cost is high, the process is cumbersome, the performance is poor, and the construction is difficult. Summary of the invention

[0006] The utility model provides a pile foundation waterproof structure and a pile foundation structure, which can solve the problems of difficulty in fixing around the pile and difficulty in pouring reinforced concrete cap construction when slow-expansion rainwater rubber strips and polysulfide caulking paste are used as waterproof materials at the pile head.

[0007] According to some embodiments, the utility model adopts the following technical solutions:

[0008] A pile foundation waterproof structure comprises a cushion layer, wherein the cushion layer is arranged outside a reinforced concrete cast-in-place pile and connected to a reinforced concrete cap;

[0009] Micro-expansive cement, polysulfide caulking paste and micro-expansive concrete are arranged in sequence from bottom to top between the cushion layer and the reinforced concrete bored piles to form a three-layer waterproof structure.

[0010] As an optional implementation, the upper end of the reinforced concrete bored pile is sleeved with a waterproof steel casing.

[0011] As an optional embodiment, the polysulfide caulking paste is arranged between the waterproof steel casing and the reinforced concrete bored pile.

[0012] As an optional implementation, a circle of steel plate is welded to the outer side of the waterproof steel casing.

[0013] As an optional embodiment, a plurality of reinforcing steel bars are welded to the outer side of the waterproof steel casing.

[0014] As an optional implementation, the reinforcing steel bars are arranged at the connection between the waterproof steel casing and the reinforced concrete cap.

[0015] As an optional embodiment, the top of the three-layer waterproof structure is flush with the top of the waterproof steel casing.

[0016] As an optional implementation, a water stop ring is provided on the outer side of the waterproof steel casing.

[0017] As an optional embodiment, the water stop ring is arranged in the cushion layer.

[0018] A pile foundation structure is provided with the above-mentioned waterproof structure.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model aims at the problem of uneven gap between pile and steel casing and takes into account the roughness around the pile. Micro-expansive concrete with good fluidity is poured as the first waterproofing layer; polysulfide caulking paste is added in the middle and squeezed to be dense as the second waterproofing layer; micro-expansive concrete is poured into the top again to protect the polysulfide caulking paste, which also serves as the third waterproofing layer.

[0021] The utility model utilizes the waterproof steel casing to realize the overall waterproof mode with the pile. Compared with the traditional method, the waterproof steel casing fixes the position of the waterproof material and the pile, ensures the compactness of the waterproof material, and is not disturbed when the concrete cap is poured.

[0022] The utility model reduces the amount of excavation of the cushion layer, greatly increases the convenience of construction, reduces the difficulty of construction, and shortens the construction period.

[0023] The utility model can select a steel sleeve of corresponding diameter according to the needs on site, can be processed and produced in a modular and standardized manner, and reduces the workload.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0026] Figure 1 It is a schematic diagram of the waterproof structure of the prior art;

[0027] Figure 2 Schematic diagram of the waterproof structure of this embodiment;

[0028] Figure 3 This is a schematic diagram of a waterproof steel casing structure according to an embodiment;

[0029] Figure 4 It is a schematic diagram of a waterproof steel casing according to another embodiment.

[0030] Among them, 1. reinforced concrete bored piles; 2. cushion layer; 3. reinforced concrete cap; 4. waterproof steel casing; 5. micro-expansive cement; 6. polysulfide caulking paste; 7. water stop ring; 8. reinforced steel bars; 9. steel plate. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0033] Embodiment 1

[0034] like Figure 2 As shown, a waterproof structure includes a cushion layer 2, wherein the cushion layer 2 is arranged outside a reinforced concrete cast-in-place pile 1 and connected to a reinforced concrete cap 3;

[0035] Micro-expansive cement 5 , polysulfide caulking paste 6 and micro-expansive concrete 5 are arranged in sequence from bottom to top between the cushion layer 2 and the reinforced concrete bored pile 1 , forming a three-layer waterproof structure.

[0036] In this embodiment, a waterproof steel casing 4 is sleeved on the outside of the reinforced concrete pile 1. The diameter of the waterproof steel casing 4 is larger than the diameter of the reinforced concrete pile 1. After breaking the pile head and before pouring the cushion layer 2 of the reinforced concrete cap 3, the waterproof steel casing 4 is positioned at the head of the reinforced concrete pile 1. 2. Add micro-expansive concrete 5 of a certain thickness around. Add polysulfide caulking paste 6 in the middle and squeeze it densely. Then pour the micro-expansive concrete 5 on top and flush with the waterproof steel casing 4.

[0037] To ensure that the waterproof steel casing is firmly connected to the concrete cap, Figure 4 As shown, in some embodiments, a circle of steel plate 9 is welded around the waterproof steel casing 4.

[0038] In order to solve the problem of waterproof steel casing being directly manufactured according to the pile diameter, standardized design, factory finished product processing, and on-site construction and assembly can be adopted, which greatly shortens the construction and manufacturing time.

[0039] In order to solve the connection problem between the waterproof steel casing and the cap, in some embodiments, as Figure 3 As shown, a circle of anchor bars 8 is added at one end of the waterproof steel casing to strengthen the connection between the reinforced concrete cap 3 and the waterproof steel casing 4.

[0040] In order to solve the problem of uneven gap between the pile and the waterproof steel casing, and considering the roughness around the pile, micro-expansive concrete 5 with good fluidity is poured in as the first waterproofing layer; polysulfide caulking paste 6 is added in the middle and squeezed densely as the second waterproofing layer; micro-expansive concrete 5 is poured into the top again to protect the polysulfide caulking paste 6, which also serves as the third waterproofing layer.

[0041] The parameters in the above embodiments and the accompanying drawings may be adjusted in other embodiments.

[0042] The above description is only the preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the utility model without creative labor shall be included in the protection scope of the utility model.

Claims

1. A pile foundation waterproof structure, characterized in that: It includes a cushion layer, which is arranged outside the reinforced concrete cast-in-place pile and connected to the reinforced concrete cap; Micro-expansive cement, polysulfide caulking paste and micro-expansive concrete are arranged in sequence from bottom to top between the cushion layer and the reinforced concrete bored piles to form a three-layer waterproof structure.

2. A pile foundation waterproof structure as claimed in claim 1, characterized in that: The upper end of the reinforced concrete cast-in-place pile is sleeved with a waterproof steel casing.

3. A pile foundation waterproof structure as claimed in claim 2, characterized in that: The polysulfide caulking paste is arranged between the waterproof steel casing and the reinforced concrete cast-in-place pile.

4. A pile foundation waterproof structure as claimed in claim 2, characterized in that: A circle of steel plate is welded on the outer side of the waterproof steel casing.

5. A pile foundation waterproof structure as claimed in claim 2, characterized in that: A plurality of reinforcing steel bars are welded to the outer side of the waterproof steel casing.

6. A pile foundation waterproof structure as claimed in claim 5, characterized in that: The reinforcing steel bars are arranged at the connection between the waterproof steel casing and the reinforced concrete cap.

7. A pile foundation waterproof structure as claimed in claim 2, characterized in that: The top of the three-layer waterproof structure is flush with the top of the waterproof steel casing.

8. A pile foundation waterproof structure as claimed in claim 2, characterized in that: A water stop ring is arranged on the outer side of the waterproof steel casing.

9. A pile foundation waterproof structure as claimed in claim 8, characterized in that: The water stop ring is arranged in the cushion layer.

10. A pile foundation structure, characterized in that: A waterproof structure as described in any one of claims 1 to 9 is provided.

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