Deepwater bare rock area anchor pile type jacket and lowering construction method thereof

Abstract

The invention provides a deepwater bare rock area anchor pile type jacket which comprises a jacket body composed of three rows of steel pipe piles sequentially arranged from inside to outside, the steel pipe piles of the jacket body are arranged in a staggered mode, and the lower ends of the inner row of steel pipe piles and the lower ends of the outer row of steel pipe piles are fixed to concrete anchor piles. The middle row of steel pipe piles and the inner side row of steel pipe piles, the middle row of steel pipe piles and the outer side row of steel pipe piles, and all the steel pipe piles of the middle row of steel pipe piles are fixed through steel pipe parallel connection. The problem of inserting and driving the steel pipe piles under the deepwater bare rock geological condition is solved, an effective construction method is provided for erecting a deepwater foundation construction platform, a whole is assembled and welded in a field, the process time of field operation is shortened, potential safety hazards are reduced, the construction efficiency is improved, the construction safety is guaranteed, the popularization value is high, and the social benefit is good.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering construction, and in particular relates to an anchor pile type conductor frame in a deep-water bare rock area and a lowering construction method thereof. Background Art

[0002] Cross-sea bridges are located in the marine environment and are large in scale, which places very high demands on technology. The design and construction of cross-sea bridges need to take into account the particularity of the marine environment, including wind resistance, wave resistance, corrosion resistance and other requirements to ensure the safety and durability of the bridge. In the prior art, with the development of cross-sea bridges, their scale and form have become complex and diverse. The deep sea, bare rock and hard geology faced during their construction make the construction of cross-sea bridges difficult, especially the underwater foundation construction. In view of the problem that it is difficult to use a pile-driving ship to directly drive and construct steel pipe piles for water foundations, a deep-water bare rock area anchored pile-type conductor frame and its lowering construction method were invented, which provides a construction method for the erection of a foundation drilling platform in deep-water bare rock areas. Summary of the invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes an anchor pile type jacket for deep-water bare rock areas and a lowering construction method thereof.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A deepwater bare rock area anchor pile type jacket, comprising a jacket consisting of three rows of steel pipe piles arranged in sequence from the inside to the outside, wherein the steel pipe piles of the jacket are arranged in a staggered manner, the lower ends of the inner row of steel pipe piles and the lower ends of the outer row of steel pipe piles are fixed to concrete anchor piles, and the middle row of steel pipe piles and the inner row of steel pipe piles, the middle row of steel pipe piles and the outer row of steel pipe piles, and the steel pipe piles of the middle row of steel pipe piles are fixed by steel pipe parallel connection.

[0006] Furthermore, the diameter of the inner row of steel pipe piles is greater than the diameter of the outer row of steel pipe piles, and the diameter of the outer row of steel pipe piles is greater than the diameter of the middle row of steel pipe piles.

[0007] Furthermore, each steel pipe pile is fixed to the steel pipe parallel connection by welding.

[0008] Furthermore, the distance between two adjacent steel pipe piles in the inner row is greater than the distance between two adjacent steel pipe piles in the outer row, and the distance between two adjacent steel pipe piles in the outer row is greater than the distance between two adjacent steel pipe piles in the middle row.

[0009] Furthermore, the diameter of the concrete anchor piles at the lower ends of the inner row of steel pipe piles is greater than the diameter of the concrete anchor piles at the lower ends of the outer row of steel pipe piles.

[0010] Furthermore, the lower end surface of the middle row of steel pipe piles is lower than the lower end surface of the inner row of steel pipe piles.

[0011] A method for lowering an anchor-pile type jacket in a deep-water bare rock area comprises the following steps:

[0012] S1. Process and weld the jacket into an integral truss, and transport the jacket as a whole to the pier position by a transport ship;

[0013] S2. Lift the jacket as a whole and lower it into place;

[0014] S3. Set up a temporary working platform on the top of the jacket as an anchor pile construction platform;

[0015] S4, drilling holes in the inner row of steel pipe piles and the outer row of steel pipe piles, then cleaning the holes, lowering the steel cage, and pouring concrete underwater to form anchor piles, thereby forming an anchor pile type jacket;

[0016] S5. Using the currently completed anchor pile jacket as the starting jacket construction pile foundation drilling platform, repeat the above steps S1 to S4 to complete the construction of other anchor pile jackets.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The anchor pile type conductor frame created by the present invention is designed with 3 rows of steel pipe piles of different diameters, which are connected to each other into an integral truss by parallel welding of steel pipes. The large-diameter steel pipe piles can be designed according to the plane position and pile diameter of the bridge foundation pipe piles, and are used as steel casings for bored pile construction. The pile bottom is designed to a corresponding height according to the undulating height of the seabed surface, which solves the problem of driving steel pipe piles under deep-water bare rock geological conditions, and provides an effective construction method for setting up a deep-water foundation construction platform. The steel pipe piles are welded into a whole on site, which reduces the process time of on-site operations, reduces safety hazards, improves construction efficiency, and ensures construction safety. It has great promotion value and good social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 Plans created for this invention;

[0021] Figure 2 Elevation drawing created for this invention. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0026] A deepwater bare rock area anchor pile type jacket, such as Figure 1 and Figure 2 As shown, the jacket comprises three rows of steel pipe piles arranged in sequence from the inside to the outside, the steel pipe piles of the jacket are arranged in a staggered manner, the lower ends of the inner row of steel pipe piles and the lower ends of the outer row of steel pipe piles are fixed to concrete anchor piles 5, and the middle row of steel pipe piles and the inner row of steel pipe piles, the middle row of steel pipe piles and the outer row of steel pipe piles, and the steel pipe piles of the middle row of steel pipe piles are fixed by steel pipe flat joints 4.

[0027] The diameter of the inner row of steel pipe piles is larger than that of the outer row of steel pipe piles, and the diameter of the outer row of steel pipe piles is larger than that of the middle row of steel pipe piles.

[0028] Each steel pipe pile and steel pipe parallel connection are welded and fixed.

[0029] The distance between two adjacent inner steel pipe piles 1 in the inner row of steel pipe piles is greater than the distance between two adjacent outer steel pipe piles 2 in the outer row of steel pipe piles, and the distance between two adjacent outer steel pipe piles in the outer row of steel pipe piles is greater than the distance between two adjacent middle steel pipe piles 3 in the middle row of steel pipe piles.

[0030] The diameter of the concrete anchor piles at the lower end of the inner row of steel pipe piles is greater than the diameter of the concrete anchor piles at the lower end of the outer row of steel pipe piles.

[0031] 6 The lower end surface of the middle row of steel pipe piles is lower than the lower end surface of the inner row of steel pipe piles.

[0032] A method for lowering an anchor-pile type jacket in a deep-water bare rock area comprises the following steps:

[0033] S1. Process and weld the jacket into an integral truss, and transport the jacket as a whole to the pier position by a transport ship;

[0034] S2. Lift the jacket as a whole and lower it into place;

[0035] S3. Set up a temporary working platform on the top of the jacket as an anchor pile construction platform;

[0036] S4, drilling holes in the inner row of steel pipe piles and the outer row of steel pipe piles, then cleaning the holes, lowering the steel cage, and pouring concrete underwater to form anchor piles, thereby forming an anchor pile type jacket;

[0037] S5. Using the currently completed anchor pile jacket as the starting jacket construction pile foundation drilling platform, repeat the above steps S1 to S4 to complete the construction of other anchor pile jackets.

[0038] The invention is created by designing 3 rows of steel pipe piles of different diameters, and the steel pipe piles are arranged in a plum blossom shape, and are connected to each other by steel pipe flat joint welding to form an integral truss. Among them, the large-diameter steel pipe piles can be designed according to the plane position and pile diameter of the bridge foundation pipe piles, and used as steel casings for bored pile construction. The pile bottom is designed to a corresponding height according to the undulating height of the seabed surface. The overall truss structure of the jacket is processed and welded into a whole in the processing field, and transported to the pier position and lowered into place by a large crane ship. After being lowered into place, a temporary working platform is set up on the top of the jacket, and concrete anchor piles are constructed on the working platform. The jacket is connected to the bottom of the seabed as a whole through the anchor piles, making the jacket firm and reliable.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An anchor pile type jacket for deep water bare rock area, characterized by: The jacket comprises three rows of steel pipe piles arranged from the inside to the outside. The steel pipe piles of the jacket are arranged in a staggered manner. The lower ends of the inner row of steel pipe piles and the lower ends of the outer row of steel pipe piles are fixed to concrete anchor piles. The middle row of steel pipe piles and the inner row of steel pipe piles, the middle row of steel pipe piles and the outer row of steel pipe piles, and the steel pipe piles in the middle row are fixed by steel pipe parallel connection.

2. The deepwater bare rock area anchor pile jacket according to claim 1, characterized in that: The diameter of the inner row of steel pipe piles is larger than that of the outer row of steel pipe piles, and the diameter of the outer row of steel pipe piles is larger than that of the middle row of steel pipe piles.

3. The deepwater bare rock area anchored pile jacket according to claim 1, characterized in that: Each steel pipe pile and steel pipe parallel connection are welded and fixed.

4. The deepwater bare rock area anchor pile jacket according to claim 1, characterized in that: The distance between two adjacent steel pipe piles in the inner row of steel pipe piles is greater than the distance between two adjacent steel pipe piles in the outer row of steel pipe piles, and the distance between two adjacent steel pipe piles in the outer row of steel pipe piles is greater than the distance between two adjacent steel pipe piles in the middle row of steel pipe piles.

5. The deepwater bare rock area anchor pile jacket according to claim 1, characterized in that: The diameter of the concrete anchor piles at the lower end of the inner row of steel pipe piles is greater than the diameter of the concrete anchor piles at the lower end of the outer row of steel pipe piles.

6. The deepwater bare rock area anchor pile jacket according to claim 1, characterized in that: The lower end surface of the middle row of steel pipe piles is lower than the lower end surface of the inner row of steel pipe piles.

7. A method for lowering an anchor-pile jacket in a deep-water bare rock area according to any one of claims 1 to 6, characterized in that: The steps include: S1. Process and weld the jacket into an integral truss, and transport the jacket as a whole to the pier position by a transport ship; S2. Lift the jacket as a whole and lower it into place; S3. Set up a temporary working platform on the top of the jacket as an anchor pile construction platform; S4, drilling holes in the inner row of steel pipe piles and the outer row of steel pipe piles, then cleaning the holes, lowering the steel cage, and pouring concrete underwater to form anchor piles, thereby forming an anchor pile type jacket; S5, using the currently completed anchor pile jacket as the starting jacket construction pile foundation drilling platform, repeating the above steps S1-S4 to complete the construction of other anchor pile jackets.

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