Steel-casing-free type pore-forming construction framework for underwater foundation pile operation

Abstract

The utility model discloses a steel-casing-free type pore-forming construction framework for foundation pile operation in water, which comprises a curtain pile body structure, a steel casing-free type pore-forming construction framework, a steel casing-free type pore-forming construction framework and a steel casing-free type pore-forming construction framework, the prefabricated sleeve seat structure is coaxially positioned and arranged at the top position of the curtain pile body structure; one end of the pile casing formwork structure in the extending direction of the pile casing formwork structure is fixedly connected with the prefabricated sleeve seat structure in a closed mode, and the pile casing formwork structure and the prefabricated sleeve seat structure are coaxially and correspondingly arranged. According to the construction framework and the construction method, the construction requirement of the underwater foundation pile body can be effectively met and completed on the basis that a traditional steel pile casing is not needed, and meanwhile the construction framework located on the upper portion of an underwater bed in the operation process of the underwater foundation pile body can be completely recycled; the cost investment and resource waste in the construction process of the foundation pile body are effectively reduced, and the engineering economy and the functional practicability of the whole framework are remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a steel casing-free hole-forming construction structure for underwater foundation pile operations. Background Art

[0002] At present, steel casing plays the following roles in the construction process of pile foundation:

[0003] 1) Drilling guide function to prevent excessive hole position deviation during pile drilling;

[0004] 2) Lateral support: It provides lateral support to the soil and concrete to prevent collapse;

[0005] 3) Provide an enclosed environment for pile foundation drilling, seal the mud, ensure the water level in the hole, and maintain a static working environment in deep water, especially in a tidal flow environment.

[0006] Therefore, steel casing construction structures are widely used in construction projects in coastal areas and in inland rivers, lakes, and other areas with unstable soils and deep water. However, apart from supporting and anti-corrosion functions in special circumstances, the majority of the steel casing's functions only occur before the pile foundation is completed. Once the steel casing is used as a permanent structure, it has many negative effects. For example: 1) The friction of the pile foundation is not fully considered when the casing extends into the soil, and the deadweight load of the steel casing increases the overall length of the pile foundation; 2) The steel-rock interface has weak bite, which reduces the vertical and horizontal bearing capacity of the pile foundation.

[0007] At the same time, to meet the requirements of modern transportation development, the construction spans of bridges in various regions have gradually increased, and their pile foundations have also been deepened. To ensure the smooth implementation of pile foundation work, the specifications and volume of the corresponding steel casings have also been required to increase simultaneously. This has resulted in a simultaneous increase in the amount of work required to install the steel casings, as well as an increase in the material consumption of the steel casings. The construction equipment and platforms required for steel casing construction have also increased, which is detrimental to the overall economic efficiency of the construction. For steel casings whose upper portions can be partially recycled, the cost of cutting and recycling is high, and the unevenness of the cutting and removal often results in a small amount of usable area. Consequently, the cut portion can only be treated as waste, resulting in increased construction costs and a serious waste of resources. Utility Model Content

[0008] To this end, the present invention provides a steel casing-free hole-forming construction structure for underwater pile foundation operations to solve the above-mentioned technical problems existing in the prior art of using steel casings to assist bridge pile foundation construction.

[0009] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0010] A steel casing-free hole-forming construction structure for underwater pile foundation operations, comprising:

[0011] The curtain pile structure is embedded and fixed inside the underwater bed;

[0012] A prefabricated sleeve structure is coaxially positioned at the top of the curtain pile structure;

[0013] The casing template structure is fixedly connected to the prefabricated sleeve structure at one end along its extension direction, and the casing template structure and the prefabricated sleeve structure are coaxially arranged.

[0014] On the basis of the above technical solution, the present invention is further described as follows:

[0015] As a further solution of the present invention, the curtain pile structure is configured as a cylindrical tubular base structure embedded in the bottom bed.

[0016] As a further solution of the present invention, the cylindrical tubular curtain pile structure is located at the outer side of the pre-construction position of the foundation pile body, and the top surface of the cylindrical tubular curtain pile structure is flush with the bottom bed.

[0017] As a further solution of the present invention, the prefabricated sleeve structure is configured as a variable diameter tubular structure with a circular cross section, and the prefabricated sleeve structure is located correspondingly at the outer side of the pre-construction position of the foundation pile body;

[0018] The bottom end surface of the variable diameter tubular prefabricated sleeve structure is coaxially fitted on the top end surface of the curtain pile structure, and the outer edge of the bottom end surface of the variable diameter tubular prefabricated sleeve structure corresponds to the inner side of the outer edge of the top end surface of the curtain pile structure.

[0019] As a further solution of the present invention, a positioning filling portion is further provided on the inner side of the prefabricated sleeve structure corresponding to above the underwater bed and above the curtain pile structure.

[0020] As a further solution of the present invention, the positioning filling portion is configured to be low-grade filling concrete with a strength grade lower than C30, and the prefabricated sleeve structure is positioned based on the bottom bed and the curtain pile structure through the filling concrete.

[0021] As a further solution of the present invention, the top opening cross-sectional area of ​​the variable diameter tubular prefabricated sleeve structure is smaller than the bottom opening cross-sectional area thereof, and the circumferential top edge of the variable diameter tubular prefabricated sleeve structure and the circumferential bottom edge of the cylindrical tubular casing template structure are coaxially and vertically correspondingly arranged.

[0022] As a further solution of the present invention, the cylindrical tubular casing template structure is vertically extended, and the top end of the cylindrical tubular casing template structure extends above the water surface.

[0023] As a further solution of the present invention, the casing template structure is configured as at least a double-flap cylindrical tubular steel template that is fixedly connected to each other by docking.

[0024] As a further solution of the utility model, it also includes: a fastening screw structure;

[0025] At least the double-petal casing template structures and the casing template structure and the top edge of the prefabricated sleeve structure are detachably fixedly assembled and connected through the fastening screw structure.

[0026] The utility model has the following beneficial effects:

[0027] This construction structure can effectively meet and complete the construction requirements of underwater foundation piles without the need to set up traditional steel casings. At the same time, it can fully recycle the construction structure located on the upper part of the water bed during the underwater foundation pile operation, effectively reducing the cost investment and resource waste during the foundation pile construction process, and significantly improving the overall engineering economy and functional practicality of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the implementation methods or the description of the prior art. The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0029] Figure 1 The present invention is a schematic diagram of the overall cross-sectional structure of a steel casing-free hole-forming construction structure for underwater pile foundation operations provided by an embodiment of the present invention.

[0030] Figure 2 This is one of the structural schematic diagrams of the construction status of a steel casing-free hole-forming construction structure for underwater pile foundation operations provided by an embodiment of the utility model.

[0031] Figure 3 This is the second structural schematic diagram of the construction status of the steel casing-free hole-forming construction structure for underwater pile foundation operations provided by an embodiment of the utility model.

[0032] Figure 4This is the third structural schematic diagram of the construction status of the steel casing-free hole-forming construction structure for underwater pile foundation operations provided by an embodiment of the utility model.

[0033] Figure 5 This is the fourth structural schematic diagram of the construction status of the steel casing-free hole-forming construction structure for underwater pile foundation operations provided by an embodiment of the utility model.

[0034] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0035] Curtain pile structure 1;

[0036] Prefabricated sleeve structure 2, positioning filling part 21;

[0037] Casing formwork structure 3; fastening screw structure 4; foundation pile body 5;

[0038] Bottom bed a; water surface b. DETAILED DESCRIPTION

[0039] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0040] The terms "upper", "lower", "left", "right", "middle", etc. used in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention.

[0041] like Figure 1 As shown, the embodiment of the present invention provides a steel casing-free hole-forming construction structure for underwater foundation pile operations, including a curtain pile structure 1, a prefabricated sleeve structure 2, a casing template structure 3, and a fastening screw structure 4. Through the above-mentioned structure, without the need for setting up traditional steel casings, it can effectively meet and complete the construction requirements of the underwater foundation pile body 5. At the same time, it can fully recycle the construction structure located on the upper part of the water bed a during the operation of the underwater foundation pile body 5, effectively reducing the cost investment and resource waste during the construction of the foundation pile body 5, and improving the economic efficiency and practicality of the project. The specific settings are as follows:

[0042] Please refer to Figure 1The curtain pile structure 1 is configured as a cylindrical tubular base structure buried inside the waterbed a. The cylindrical tubular curtain pile structure 1 corresponds to the outer side of the pre-construction position of the foundation pile body 5, and the top surface of the cylindrical tubular curtain pile structure 1 is flush with the waterbed a. The curtain pile structure 1 is used to reinforce the foundation of the pre-construction position of the foundation pile body 5, thereby preventing the waterbed a from settling and deforming after the prefabricated sleeve structure 2 and the casing formwork structure 3 are installed.

[0043] The prefabricated sleeve structure 2 is configured as a variable diameter tubular structure with a circular cross-section, and the prefabricated sleeve structure 2 corresponds to the outer side of the pre-construction position of the foundation pile body 5; the bottom end face of the variable diameter tubular prefabricated sleeve structure 2 is arranged in a coaxial manner on the top end face of the curtain pile structure 1, and the outer edge of the bottom end face of the variable diameter tubular prefabricated sleeve structure 2 corresponds to the inner side of the outer edge of the top end face of the curtain pile structure 1, so that the curtain pile structure 1 can effectively serve as the bearing foundation of the prefabricated sleeve structure 2, significantly improving the construction stability of the structure above the underwater bed a.

[0044] The inner side of the prefabricated sleeve structure 2 is also filled with a positioning filling part 21 corresponding to the top of the water bottom bed a and the curtain pile structure 1. The positioning filling part 21 is set to low-grade filling concrete with a strength grade lower than C30, so as to effectively position the prefabricated sleeve structure 2 based on the water bottom bed a and the curtain pile structure 1 through filling concrete, and can be set with the help of low-grade filling concrete, so that the drilling can be effectively completed normally during the subsequent construction of the foundation pile body 5, thereby improving the functional practicality.

[0045] Please continue to refer to Figure 1 The casing formwork structure 3 is configured as at least a double-petal cylindrical tubular steel formwork; the top opening cross-sectional area of ​​the variable-diameter tubular prefabricated sleeve structure 2 is smaller than the bottom opening cross-sectional area thereof, and the circumferential top edge of the variable-diameter tubular prefabricated sleeve structure 2 is coaxially and vertically corresponding to the circumferential bottom edge of the cylindrical tubular casing formwork structure 3, so that the top end of the prefabricated sleeve structure 2 can effectively adaptably dock with the casing formwork structure 3; the cylindrical tubular casing formwork structure 3 is vertically extended, and the top end of the cylindrical tubular casing formwork structure 3 extends above the water surface b, so that the casing formwork structure 3 can effectively serve as a reinforced concrete casting and forming template for the foundation pile body 5.

[0046] Specifically, at least the double-petal type casing formwork structures 3 and the casing formwork structures 3 and the top edge of the prefabricated sleeve structure 2 are connected and fixedly assembled in a detachable manner through the fastening screw structure 4, so as to achieve that the prefabricated sleeve structure 2, casing formwork structure 3 and fastening screw structure 4 of the foundation pile body 5 can all be recycled during underwater operation, effectively reducing the cost investment and resource waste during the construction of the foundation pile body 5, and significantly improving the engineering economy and functional practicality.

[0047] Please refer to Figures 2 to 5 The present invention also provides a method for drilling a hole without steel casing for underwater pile foundation operation, which specifically includes the following steps:

[0048] S1: Configure cement mixing pile construction machinery and equipment;

[0049] The specific process is as follows: modify a specific ship to make it suitable for the construction of underwater foundation piles 5;

[0050] Installation of cement mixing pile construction machinery and equipment based on modified specific ships;

[0051] S2: The curtain pile structure 1 is formed by cement mixing pile construction at the pre-construction position corresponding to the foundation pile body 5;

[0052] The specific process is as follows: through precise layout, cement mixing pile construction machinery and equipment are used to excavate the outer side of the pre-construction position of the foundation pile body 5 and carry out cement mixing pile construction to form a cylindrical tubular curtain pile structure 1, and the top surface of the curtain pile structure 1 is kept flush with the water bottom a;

[0053] S3: Coaxially locate and install the prefabricated sleeve structure 2 based on the curtain pile structure 1;

[0054] The specific process is as follows: cleaning the top surface of the curtain pile structure 1 to ensure that the top surface of the curtain pile structure 1 is flat;

[0055] A prefabricated sleeve structure 2 is coaxially arranged on the annular top surface of the curtain pile structure 1, and low-grade concrete is filled corresponding to the inner side of the prefabricated sleeve structure 2 and above the waterbed a and above the curtain pile structure 1. By filling the concrete, the prefabricated sleeve structure 2 is positioned based on the waterbed a and the curtain pile structure 1, ensuring that the prefabricated sleeve structure 2 corresponds coaxially to the pre-constructed foundation pile body 5;

[0056] S4: Coaxially position and install the casing template structure 3 based on the prefabricated sleeve structure 2;

[0057] The specific process is as follows: the casing formwork structure 3 is installed underwater, the bottom end of the casing formwork structure 3 is fixedly connected to the top end of the prefabricated sleeve structure 2 by means of a fastening screw structure 4, and at least the two petals of the casing formwork structure 3 are fixedly connected by means of a fastening screw structure 4, the prefabricated sleeve structure 2 is extended to above the water surface b, and the casing formwork structure 3 is coaxially corresponding to the pre-constructed foundation pile body 5;

[0058] S5: Installing a drilling device on the modified special ship, aligning the drill bit of the drilling device with the center of the pre-constructed foundation pile body 5 and drilling the pile foundation holes in sequence corresponding to the inner concrete of the prefabricated sleeve structure 2 and the seabed a. After the pile foundation holes are formed, the steel cage is installed, and then concrete is poured to complete the construction of the foundation pile body 5;

[0059] S6: After completing a specific curing process for the foundation pile body 5, the fastening screw structure 4 located above the water bed a is dismantled in sequence, and the prefabricated sleeve structure 2 and the casing formwork structure 3 are dismantled in sections. The prefabricated sleeve structure 2 and the casing formwork structure 3 are then applied to the next pile foundation construction to achieve structural recycling.

[0060] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, such modifications or improvements, without departing from the spirit of the present invention, are within the scope of protection claimed herein.

Claims

1. A steel casing-free hole-forming construction framework for underwater pile foundation operations, characterized in that: include: The curtain pile structure is buried and fixed inside the bottom of the water bed; A prefabricated sleeve structure is coaxially positioned at the top of the curtain pile structure; The casing template structure has one end portion along its extension direction connected to the prefabricated sleeve structure in a closed and fixed manner, and the casing template structure and the prefabricated sleeve structure are coaxially arranged correspondingly.

2. The steel casing-free hole-forming construction structure for underwater pile foundation operation according to claim 1 is characterized in that: The curtain pile structure is configured as a cylindrical tubular base structure embedded in the bottom of the water bed.

3. The steel casing-free hole-forming construction structure for underwater pile foundation operation according to claim 2 is characterized in that: The cylindrical tubular curtain pile structure corresponds to the outer side of the pre-construction position of the foundation pile body, and the top end surface of the cylindrical tubular curtain pile structure is flush with the bottom bed.

4. The steel casing-free hole-forming construction structure for underwater pile foundation operation according to claim 3 is characterized in that: The prefabricated sleeve structure is configured as a variable diameter tubular structure with a circular cross section, and the prefabricated sleeve structure is located correspondingly at the outer side of the pre-construction position of the foundation pile body; The bottom end surface of the variable diameter tubular prefabricated sleeve structure is coaxially fitted on the top end surface of the curtain pile structure, and the outer edge of the bottom end surface of the variable diameter tubular prefabricated sleeve structure corresponds to the inner side of the outer edge of the top end surface of the curtain pile structure.

5. The steel casing-free hole-forming construction structure for underwater pile foundation operation according to claim 4 is characterized in that: The inner side of the prefabricated sleeve structure is also filled with a positioning filling part corresponding to the upper part of the underwater bed and the upper part of the curtain pile structure.

6. The steel casing-free hole-forming construction structure for underwater pile foundation operation according to claim 5 is characterized in that: The positioning filling part is configured to be low-grade filling concrete with a strength grade lower than C30, and the prefabricated sleeve structure is positioned based on the bottom bed and the curtain pile structure by means of the filling concrete.

7. The steel casing-free hole-forming construction framework for underwater pile foundation operations according to claim 5 is characterized in that: The top opening cross-sectional area of ​​the variable diameter tubular prefabricated sleeve structure is smaller than the bottom opening cross-sectional area thereof, and the circumferential top edge of the variable diameter tubular prefabricated sleeve structure and the circumferential bottom edge of the cylindrical tubular casing template structure are coaxially and vertically correspondingly arranged.

8. The steel casing-free hole-forming construction framework for underwater pile foundation operations according to claim 7 is characterized in that: The cylindrical tubular casing template structure is vertically extended, and the top end of the cylindrical tubular casing template structure extends above the water surface.

9. The steel casing-free hole-forming construction structure for underwater pile foundation operation according to claim 8 is characterized in that: The casing template structure is configured as at least a double-flap cylindrical tubular steel template that is butt-fixedly connected.

10. The steel casing-free hole-forming construction structure for underwater pile foundation operation according to claim 9 is characterized in that: Also includes: Fastening screw structure; At least the double-petal casing template structures and the casing template structure and the top edge of the prefabricated sleeve structure are detachably fixedly assembled and connected through the fastening screw structure.

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