Non-return device for pile foundation construction and pile foundation construction assembly

Abstract

The utility model discloses a non-return device for pile foundation construction and a pile foundation construction assembly. The non-return device for pile foundation construction is composed of a first non-return mechanism, a sealing base and a second non-return mechanism. The first non-return mechanism sleeves and is fixed on the outer wall of the bottom end of the steel structure support; the second non-return mechanism and the sealing base are fixed on the inner wall of the pile body at an interval from top to bottom; the first non-return mechanism is an annular table, and the outer side wall face of the first non-return mechanism is a conical face with the outer diameter gradually reduced from top to bottom. The second non-return mechanism is of a cone-like cylinder structure formed by fixing a plurality of obliquely arranged non-return petals on the inner wall of the pile body at intervals in the circumferential direction; the sealing base is composed of a bottom plate, a rubber grout stopping pad and a circular ring base which are coaxially arranged and sequentially and fixedly connected from bottom to top. According to the non-return device for pile foundation construction, structural transformation is conducted on the pile body and the steel structure support, limiting connection of the pile body and the steel structure support is achieved, phase separation in follow-up adjustment is avoided, the grouting part of the pile body is sealed and isolated, construction efficiency is improved, and construction cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation construction, in particular to a backflow prevention device for pile foundation construction and a pile foundation construction component. Background Art

[0002] In pile foundation construction, a wide range of construction methods are to use multiple piles to form a pile structure foundation, and then install a steel structure on the pile structure foundation. In the process of erecting a steel structure on the pile structure foundation, the insertion method is generally adopted, that is, by setting multiple steel structure supports that match each pile body on the bottom surface of the steel structure, the steel structure is first inserted and positioned on the pile body through the steel structure supports, and then adjusted and grouting is performed to fix it.

[0003] However, the conventional construction method mentioned above can easily cause the steel structure support to be pulled out of the pile during the subsequent steel structure adjustment, and the installation of effective temporary fixings will inevitably increase the construction cost and prolong the construction time. In addition, in the subsequent grouting construction, due to the lack of an effective sealing structure in the pile body, the grouting volume in the pile body is large, and the construction cost is too high. Therefore, based on the above existing technical problems, it is necessary to improve the structure of the pile body and the steel structure support to solve the problem that the steel structure support is easy to separate from the pile body during the adjustment operation, and the problem that the grouting volume is too large due to insufficient sealing during the grouting operation. Utility Model Content

[0004] The utility model aims to provide a backflow prevention device for pile foundation construction which solves the above technical problems.

[0005] Another object of the utility model is to provide a pile foundation construction assembly having the above-mentioned anti-reverse device for pile foundation construction.

[0006] To this end, the technical solution of the utility model is as follows:

[0007] A backflow prevention device for pile foundation construction, consisting of a first backflow prevention mechanism, a sealing base and a second backflow prevention mechanism; wherein the first backflow prevention mechanism is an annular platform, the outer wall of which is a conical surface with an outer diameter gradually decreasing from top to bottom; the second backflow prevention mechanism is composed of a plurality of backflow prevention petals, which are used to be fixed on the inner wall of the pile body in an oblique manner along the circumferential direction with the top thereof spaced apart; the sealing base is used to be fixed on the inner wall of the pile body below the second backflow prevention mechanism, and is composed of a bottom plate, a rubber stop grout pad and a circular ring base which are coaxially arranged and fixedly connected in sequence from bottom to top.

[0008] Furthermore, the inner diameter of the annular platform is adapted to the outer diameter of the bottom end of the steel structure support, so that it can be sleeved and fixed on the outer wall of the bottom end of the steel structure support.

[0009] Furthermore, the top outer diameter of the annular platform is smaller than the top inner diameter of the pile body, and the bottom outer diameter of the annular platform is adapted to the diameter of the base plate and the rubber stop grouting pad, so that the bottom surface of the annular platform can be completely pressed onto the base plate and the rubber stop grouting pad is deformed by squeezing the base plate.

[0010] Furthermore, the check flap is an isosceles trapezoidal plate that is arranged inverted.

[0011] A pile foundation construction assembly with a non-return device for pile foundation construction, comprising a steel structure support provided with a first non-return mechanism, and a pile body provided with a sealing base and a second non-return mechanism; wherein the annular platform of the first non-return mechanism is sleeved and fixed on the outer wall of the bottom end of the steel structure support; a plurality of non-return petals of the second non-return mechanism are obliquely arranged and fixed to the inner wall of the pile body through the upper edge of the non-return petals, and the inclination angles of the plurality of non-return petals are the same, so that they form a non-continuous conical cylinder on the inner wall of the pile body with an inner diameter gradually decreasing from top to bottom; the sealing base is arranged at intervals below the second non-return mechanism, and is horizontally fixed to the inner wall of the pile body through a circular ring base; the distance from the top surface of the bottom plate to the lower edge of the non-return petal is greater than the axial length of the annular platform, and the top outer diameter of the annular platform is greater than the bottom inner diameter of the second non-return mechanism.

[0012] Furthermore, the oblique setting angle of each check petal is adapted to the conical angle of the outer wall of the annular platform, so that the steel structure support is inserted into the pile body in a manner in which the outer wall of the annular platform fits the inner side of each check petal.

[0013] Compared with the prior art, the anti-return device for pile foundation construction can be used to structurally transform the pile body and steel structure support used in pile foundation construction, so as to form a pile foundation construction assembly with the anti-return device for pile foundation construction; the pile body and steel structure support that have undergone structural transformation can achieve rapid docking and complete the limit connection at the same time, which solves the problem that the steel structure support is easily pulled out of the pile during the subsequent steel structure adjustment process, and the limit connection ensures that the position adjustable space is still retained between the steel structure and the pile body; at the same time, by adding a sealing base to the pile body, the grouting part of the pile body is well sealed and isolated from the space below the pile body, which facilitates the subsequent grouting construction and avoids the loss and waste of slurry; in summary, the pile body and steel structure support improved by the above-mentioned anti-return device for pile foundation construction are used in pile foundation construction, which not only improves the overall construction efficiency but also reduces the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the first anti-return mechanism of the anti-return device for pile foundation construction of the utility model being assembled on a steel structure support;

[0015] Figure 2 A perspective structural diagram of the sealing base and the second anti-return mechanism of the anti-return device for pile foundation construction of the utility model assembled on the pile body;

[0016] Figure 3 It is a perspective structural schematic diagram of a steel structure support and a pile body in an inserted and matched state in a pile foundation construction assembly with a backstop device for pile foundation construction of the utility model. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention in any way.

[0018] Example 1

[0019] See also Figure 1 and Figure 2 A backflow prevention device for pile foundation construction is composed of a first backflow prevention mechanism, a sealing base and a second backflow prevention mechanism; wherein the first backflow prevention mechanism is used for structural improvement of a steel structure support 1, and the second backflow prevention mechanism and the sealing base are used for structural improvement of a pile body 2.

[0020] The first anti-return mechanism is an annular platform 7 that can be sleeved and fixed on the outer wall of the bottom end of the steel structure support 1, and the outer wall surface of the annular platform 7 is a conical surface with an outer diameter that gradually decreases from top to bottom.

[0021] The second non-return mechanism is composed of a plurality of non-return petals 3, which are arranged in an oblique manner, spaced apart along the circumferential direction of the pile body 2 and fixed on the inner wall of the pile body 2, so as to form a conical tube-like structure having both guiding and non-return functions; wherein the non-return petals 3 are preferably isosceles trapezoidal plates, and are arranged inverted in the pile body 2.

[0022] The sealing base is used to be fixed on the inner wall of the pile body 2, and is composed of a bottom plate 4, a rubber stop grout pad 5 and a circular base 6 which are coaxially arranged and fixedly connected from bottom to top in sequence; wherein the circular base 6 is horizontally arranged, the rubber stop grout pad 5 is bonded and fixed on the top surface of the circular base 6 and is located near the edge of its inner ring, the bottom plate 4 is a horizontally arranged circular plate, which is bonded and fixed on the top surface of the rubber stop grout pad 5, so that the rubber stop grout pad 5 is sandwiched and fixed between the bottom plate 4 and the circular base 6, and the annular body structure of the circular base 6 is conducive to the rubber stop grout pad 5 being squeezed and deformed when subjected to downward pressure. .

[0023] The top outer diameter of the annular platform 7 is smaller than the top inner diameter of the pile body 2, and the bottom outer diameter of the annular platform 7 is adapted to the diameters of the base plate 4 and the rubber stop grouting pad 5, so that the bottom surface of the annular platform can be completely pressed onto the base plate and the rubber stop grouting pad is deformed by squeezing the base plate.

[0024] Example 2

[0025] See also Figure 1 to Figure 3A pile foundation construction assembly with a backstop device for pile foundation construction includes a steel structure support provided with a first backstop mechanism, and a pile body provided with a sealing base and a second backstop mechanism; wherein the arrangement positions of the second backstop mechanism and the sealing base on the inner wall of the pile body 2 are adapted to the length requirement of the steel structure support 1 to be inserted into the pile body 2.

[0026] The annular platform 7 of the first non-return mechanism is sleeved and fixed on the outer wall of the bottom end of the steel structure support 1, and can also be directly formed into an integral part with the steel structure support 1.

[0027] The multiple check petals 3 of the second check mechanism are arranged at intervals along the circumferential direction of the pile body 2, and each check petal 3 is arranged obliquely and fixed to the inner wall of the pile body 2 through the upper edge of the check petal 3; the inclination angles of the multiple check petals 3 are the same and are adapted to the top outer diameter of the annular platform 7, so that the bottom inner diameter of the conical cylinder formed by the multiple check petals 3 on the inner wall of the pile body 2 is smaller than the top outer diameter of the annular platform 7.

[0028] As a preferred technical solution of this embodiment, the oblique setting angle of each check petal 3 is adapted to the conical angle of the outer wall of the annular platform 7, so that the steel structure support 1 is inserted into the pile body 2 in a manner that the outer wall of the annular platform 7 fits with the inner side of each check petal 3.

[0029] The sealing base is arranged below the second non-return mechanism at intervals, and is fixed on the inner wall of the pile body 2 through a horizontally arranged circular ring base 6 .

[0030] In order to ensure that the first non-return mechanism can cooperate with the second non-return mechanism, the top outer diameter of the annular platform 7 is smaller than the top inner diameter of the pile body 2 and larger than the bottom inner diameter of the second non-return mechanism. The distance from the top surface of the bottom plate 4 to the lower edge of the non-return petal 3 is larger than the axial length of the annular platform 7, so that the first non-return mechanism can be smoothly inserted into the space between the second non-return mechanism and the sealing base along with the steel structure support 1, and the non-return effect of the second non-return mechanism cooperating with the first non-return mechanism can limit the steel structure support 1 from being pulled out of the pile body again.

[0031] In order to ensure that the sealing base can cooperate with the first anti-return mechanism, the diameter of the bottom plate 4 is the same as the outer diameter of the bottom end of the annular platform 7, and the diameter of the rubber grouting pad 5 is the same as the diameter of the bottom plate 4; when the steel structure support 1 falls onto the bottom plate 4, the bottom plate 4 is pressed down, and the bottom plate 4 is squeezed by the force to squeeze the rubber grouting pad 5 to deform, so that the connection and seal between the bottom plate 4, the rubber grouting pad 5 and the annular base 6 are tighter, thereby playing a good sealing role in the subsequent grouting construction, and the grouting slurry will not flow away from the gap between the bottom plate 4 and the annular base 6.

[0032] See also Figure 3The working principle of the non-return cooperation and sealing cooperation between the steel structure support 1 and the pile body 2 is as follows: during the pile construction, the steel structure is docked with the pile body 2 through the steel structure support 1. When the bottom end of the steel structure support 1 is inserted into the pile body 2, the first non-return mechanism at the bottom end of the steel structure support 1 cooperates with the second non-return mechanism in the pile body 2 to play a non-return role, forming a temporary connection and fixing effect, and limiting the steel structure support 1 from being pulled out of the pile body 2; at the same time, the steel structure support 1 also has a certain rotation adjustment space and axial movement adjustment relative to the pile body 2; when the steel structure adjustment is completed, the steel structure support 1 continues to fall, and when the bottom surface of the steel structure support 1 is pressed on the bottom plate 4, the bottom plate 4 is forced to squeeze the rubber grouting pad 5, so that the connection between the bottom plate 4, the rubber grouting pad 5 and the annular base 6 is tighter, which plays a good sealing role during the subsequent grouting construction; finally, grouting is performed from the top opening of the pile body 2. After the grouting solidifies, the steel structure support 1 and the pile body 2 are fixedly connected as a whole.

[0033] The above is a detailed description of the embodiments of the present invention, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of application of the present invention shall still fall within the scope of the patent coverage of the present invention.

Claims

1. A backflow prevention device for pile foundation construction, characterized in that: The invention is composed of a first non-return mechanism, a sealing base and a second non-return mechanism; wherein the first non-return mechanism is an annular platform (7), the outer wall of which is a conical surface with an outer diameter gradually decreasing from top to bottom; the second non-return mechanism is composed of a plurality of non-return petals (3), which are used to be fixed on the inner wall of the pile body (2) at intervals in an oblique manner along the circumferential direction; the sealing base is used to be fixed on the inner wall of the pile body (2) below the second non-return mechanism, and is composed of a bottom plate (4), a rubber stop grout pad (5) and a circular ring base (6) which are coaxially arranged and fixedly connected in sequence from bottom to top.

2. The anti-return device for pile foundation construction according to claim 1, characterized in that: The inner diameter of the annular platform (7) is adapted to the outer diameter of the bottom end of the steel structure support (1), so that the annular platform (7) can be sleeved and fixed on the outer wall of the bottom end of the steel structure support (1).

3. The anti-return device for pile foundation construction according to claim 1, characterized in that: The outer diameter of the top end of the annular platform (7) is smaller than the inner diameter of the top side of the pile body (2), and the outer diameter of the bottom end of the annular platform (7) is adapted to the diameters of the bottom plate (4) and the rubber grout-stopping pad (5).

4. The anti-return device for pile foundation construction according to claim 1, characterized in that: The check flap (3) is an isosceles trapezoidal plate that is arranged in an inverted manner.

5. A pile foundation construction assembly having a backstop device for pile foundation construction according to any one of claims 1 to 4, comprising a steel structure support (1) provided with a first backstop mechanism, and a pile body (2) provided with a sealing base and a second backstop mechanism; wherein: The annular platform (7) of the first non-return mechanism is sleeved and fixed on the outer wall of the bottom end of the steel structure support (1); the multiple non-return petals (3) of the second non-return mechanism are obliquely arranged and fixed on the inner wall of the pile body (2) through the upper edge of the non-return petals (3); the multiple non-return petals (3) have the same inclination angle, so that they form a non-continuous conical cylinder structure on the inner wall of the pile body (2) with an inner diameter gradually decreasing from top to bottom; the sealing base is arranged at intervals below the second non-return mechanism and is horizontally fixed on the inner wall of the pile body (2) through the circular ring base (6); the distance from the top surface of the bottom plate (4) to the lower edge of the non-return petals (3) is greater than the axial length of the annular platform (7), and the top outer diameter of the annular platform (7) is greater than the bottom inner diameter of the second non-return mechanism.

6. The pile foundation construction assembly according to claim 5, characterized in that: The oblique setting angle of each check valve (3) is adapted to the conical angle of the outer wall surface of the annular platform (7), so that the steel structure support (1) is inserted into the pile body (2) in a manner that the outer wall surface of the annular platform (7) fits the inner side surface of each check valve (3).

Images