Closed-end inner-rib socket type steel pipe pile

Abstract

The utility model discloses a closed type inner rib socket type steel pipe pile, including coaxial connection's first section steel pipe pile and at least one section secondary steel pipe pile, first section steel pipe pile includes first steel pipe, and first steel pipe one end is closed, and the other end is open, and secondary steel pipe pile includes second steel pipe, and both ends of second steel pipe are open, and the upper installation of one open end of second steel pipe is with a plurality of inner rib board, and inner rib board is along the end of second steel pipe's inside surface circumferential arrangement, and the open end of second steel pipe is stretched out, and the one end of secondary steel pipe pile with the inner rib board cooperation with first section steel pipe pile open one end, and the one end of secondary steel pipe pile with the inner rib board cooperation with the one end of adjacent secondary steel pipe pile not including the inner rib board. The utility model provides a closed type inner rib socket type steel pipe pile, and the end of first section steel pipe pile is closed, and the compaction effect of static pressure pile end is improved, and adopts the inner rib board socket type splicing structure, avoids the finite space welding operation, and the construction difficulty is small, and the risk coefficient is low.

Description

Technical Field

[0001] This utility model relates to the field of foundation reinforcement technology, specifically to a closed-type internal ribbed socket steel pipe pile. Background Technology

[0002] With the upgrading and development of urban infrastructure, the foundations of older buildings or those requiring renovation due to changes in business operations need to be reinforced. Currently, the common method for foundation reinforcement is pit-type static pressure piles, with open pile ends and the upper and lower pile sections fully welded together. However, this traditional process involves construction in a pilot pit below the foundation, resulting in limited operating space. Fully welding the joint between two steel pipe piles is challenging, and welding is a specialized trade with inherent risks in confined spaces. Furthermore, the open-end pile design leads to poor compaction at the pile end after completion, making it difficult to guarantee bearing capacity. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a closed-type internal ribbed socket steel pipe pile, which solves the problems of the existing pit-type static pressure pile using welding, which is difficult to achieve, and the open end of the pile can easily lead to difficulty in ensuring bearing capacity.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a closed-type internal ribbed socket steel pipe pile, comprising a first section of steel pipe pile and at least one second section of steel pipe pile connected coaxially.

[0005] The first section of the steel pipe pile includes a first steel pipe, which is closed at one end and open at the other end.

[0006] The second section of the steel pipe pile includes a second steel pipe, which is open at both ends.

[0007] The second steel pipe has several inner ribs installed on one of its open ends. The inner ribs are arranged circumferentially along the inner side of the end of the second steel pipe and extend out of the open end of the second steel pipe.

[0008] The end of the second section of the steel pipe pile with the inner rib plate is fitted with the open end of the first section of the steel pipe pile.

[0009] The end of the secondary steel pipe pile with the inner rib plate is fitted with the end of the adjacent secondary steel pipe pile that does not have the inner rib plate.

[0010] This utility model also has the following technical features: One end of the first steel pipe is sealed by a sealing plate, which is circular in shape.

[0011] The sealing plate is equipped with a cross rib on the side facing away from the first steel pipe. The cross rib includes a first cross rib and a second cross rib arranged vertically, and both the first cross rib and the second cross rib are perpendicular to the sealing plate.

[0012] The lengths of the first and second cross ribs are the same as the outer diameter of the first steel pipe.

[0013] The first and second steel pipes are 400mm in diameter, 12mm thick, and 1200mm long.

[0014] The sealing plate is 12mm thick.

[0015] The inner rib plate is 200mm long, 100mm high, and 12mm thick.

[0016] The inner rib plate, with a length of 50mm, is welded to the inner side of the end of the second steel pipe, and the remaining length extends out of the end of the second steel pipe.

[0017] Compared with the prior art, this utility model has the following technical effects: (I) The present invention provides a closed-type internal rib socket steel pipe pile, in which the end of the first section of the steel pipe pile is closed, which improves the compaction effect of the end of the static pressure pile; the internal rib socket splicing structure avoids welding operations in confined space, making construction less difficult and the risk factor lower.

[0018] (II) The present invention provides a closed-type internal ribbed steel pipe pile with a cross rib plate installed on the sealing plate, which is conducive to cutting the soil and pressing the pile.

[0019] (III) The closed-type internal ribbed socket steel pipe pile provided by this utility model has a simple structure, is easy to operate, and has outstanding environmental and quality benefits, and has good promotion and application value. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure and connection relationship of a closed-type internal ribbed socket steel pipe pile according to the present invention.

[0021] Figure 2 This is a schematic diagram of the first section of the steel pipe pile structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the secondary steel pipe pile structure and connection relationship of this utility model.

[0023] Figure 4 This is a schematic diagram showing the installation position of the cross rib plate of this utility model.

[0024] Figure 5 This is a schematic diagram showing the installation position of the inner rib plate of this utility model.

[0025] The meanings of the labels in the attached diagram are as follows: 1 - First section of steel pipe pile, 2 - Second section of steel pipe pile.

[0026] 1-1-First steel pipe, 1-2-Sealing plate, 1-3-Cross rib plate.

[0027] 2-1-Second steel pipe, 2-2-Inner rib plate.

[0028] 1-2-1-First cross rib, 1-2-2Second cross rib.

[0029] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0030] Unless otherwise specified, all components in this invention are made from components known in the prior art.

[0031] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0032] Example 1: This embodiment provides a closed-type internally ribbed socket steel pipe pile, such as... Figures 1-5 As shown, it includes a first section of steel pipe pile 1 and at least one second section of steel pipe pile 2, which are coaxially connected.

[0033] The first section of the steel pipe pile 1 includes a first steel pipe 1-1, which is closed at one end and open at the other end.

[0034] The secondary steel pipe pile 2 includes a second steel pipe 2-1, which has open ends.

[0035] A plurality of inner ribs 2-2 are installed on one of the open ends of the second steel pipe 2-1. The inner ribs are arranged circumferentially along the inner side of the end of the second steel pipe 2-1 and extend out of the open end of the second steel pipe 2-1.

[0036] The end of the secondary steel pipe pile 2 equipped with the inner rib plate 2-2 is matched with the open end of the primary steel pipe pile 1.

[0037] The end of the secondary steel pipe pile 2 with the inner rib plate 2-2 is fitted with the end of the adjacent secondary steel pipe pile 2 excluding the inner rib plate 2-2.

[0038] The end of the first steel pipe pile 1 is closed, and the internal rib splicing method is adopted, which greatly improves the end compaction effect of the static pressure pile and avoids welding operations in confined spaces. It has outstanding environmental and quality benefits and has good value for promotion and application.

[0039] As a preferred embodiment: One end of the first steel pipe 1-1 is sealed by a sealing plate 1-2, which is circular.

[0040] The sealing plate 1-2 is equipped with a cross rib plate 1-3 on the side facing away from the first steel pipe 1-1. The cross rib plate 1-3 includes a first cross rib plate 1-3-1 and a second cross rib plate 1-3-2 arranged vertically, and both the first cross rib plate 1-3-1 and the second cross rib plate 1-3-2 are perpendicular to the sealing plate 1-2.

[0041] The sealing plate 1-2 is externally welded with cross ribs 1-3, which facilitates cutting the soil and pressing down the pile.

[0042] As a preferred embodiment: The lengths of the first cross rib plate 1-3-1 and the second cross rib plate 1-3-2 are the same as the outer diameter of the first steel pipe 1-1.

[0043] As a preferred embodiment: The first steel pipe 1-1 and the second steel pipe 2-1 have a diameter of 400mm, a wall thickness of 12mm, and a length of 1200mm.

[0044] The sealing plate 1-2 is 12mm thick.

[0045] The inner rib 2-2 is 200mm long, 100mm high, and 12mm thick; as... Figure 2 As shown, the length is along the axis of the second steel pipe 2-1, and the height is along the diameter of the second steel pipe 2-1.

[0046] The inner rib plate 2-2 is welded to the inner side of the end of the second steel pipe 2-1 with a length of 50mm, and the remaining length extends out of the end of the second steel pipe 2-1.

[0047] The specific working process of this utility model: The end of the first section of steel pipe pile 1 is sealed. The inner steel rib plate 2-2 (welded 50mm, exposed 150mm) is welded to the inner side of the bottom of the subsequent section of steel pipe pile as a bearing component.

[0048] Using the self-weight of the building's superstructure as a reaction force and the foundation as a fulcrum, hydraulic jacks are used to press the first section of steel pipe pile 1 and the second section of steel pipe pile 2 into the soil in sections to form end-bearing piles. After replacement, the piles and foundation are poured together to form an integral whole to bear the superstructure load.

[0049] The first section of the steel pipe pile is welded with a sealing plate 1-2 at one end to improve the compaction effect. The sealing plate 1-2 is welded with a cross rib plate 1-3 on the outside to facilitate cutting the soil and driving the pile.

[0050] Six 200mm long (50mm welded, 150mm exposed) and 100mm high inner ribs 2-2 are axially welded to the inner bottom of the second section of steel pipe pile 2. These ribs are then aligned with the top of the adjacent second section of steel pipe pile 2 or the first section of steel pipe pile 1 before being inserted and pressed down, facilitating pile splicing and ensuring stability. During the pile pressing process, a top bar is used to stabilize the pile horizontally in four directions, preventing deviation in pile verticality.

[0051] 4.1 Process Flow Construction preparation → Setting out the pilot tunnel location → Excavating the pilot tunnel → Setting out the pile location → Piling → Replacement → Pouring concrete into the pile → Pouring and backfilling the pilot tunnel 4.2 Key Operational Points 4.2.1 Location of the pilot tunnel The excavation control line for the pilot tunnel is laid out according to the design requirements. The first steel pipe 1-1 and the sealing plate 1-2 are welded together, and then the cross rib plate 1-3 on the outside of the sealing plate is welded together to form the first section of steel pipe pile 1.

[0052] The second steel pipe and six 20cm long inner ribs are then welded together to form the second section of the steel pipe pile 2. Welding of multiple sections of the second section of the steel pipe pile is completed as needed.

[0053] 4.2.2 Excavation of pilot tunnel I. Vertical Guide Tunnel Excavation: Referring to the control lines, use a static cutting machine to break up the foundation slab concrete. During soil excavation, excavate layer by layer from top to bottom using picks, shovels, or spades, following the order of excavating the center first and then the perimeter. Excavated soil and rock are loaded into buckets and slowly lifted using electric hoists for vertical transport to the ground and stockpiled at the designated location. Excavate and support in layers to the design depth. The guide tunnel walls are supported using I-beams. The vertical guide tunnel is 2.7 meters high, 1 meter long, and 1 meter wide.

[0054] II. Excavation of the Horizontal Working Pilot Tunnel: Begin excavating the horizontal working pilot tunnel in the direction shown in the drawings. Excavation will be carried out manually. The excavated soil will be transported horizontally to the vertical operating pit location and then lifted out of the ground using an electric hoist and piled at the designated location. The horizontal working pilot tunnel is 1.8 meters high, 1.5 meters long, and 1 meter wide.

[0055] 4.2.3 Setting out pile positions Mark the location of the pit-type underpinning static pressure piles according to the design drawings. Dig a guide pit on the outside of the column according to this location, and then measure the pile position at the bottom of the original foundation according to the accurate location designed in the drawings.

[0056] 4.2.4 Piling Static pressure piles should be constructed using a staggered, interval-based method. Divide the area into three zones—left, center, and right—based on the axis. Piling work should proceed first on the left and right sides, followed by the center zone. For each zone, the pilot pit should be constructed using a staggered-one-pile method, and each pile location should be numbered to facilitate orderly work.

[0057] Piling: When installing the first section of steel pipe pile 1, use a measuring ruler to check its verticality, and use a jack to firmly support the first section of steel pipe pile 1 in four horizontal directions. Place a steel plate on top of the first section of steel pipe pile 1 to block the pipe opening, then place a steel pad, install a dial jack and start applying pressure. The verticality should be checked once for each section of pile.

[0058] Pile splicing: After the first pile section is driven to the point where 20cm of the top is exposed, splicing is carried out. During splicing, the inner rib plate 2-2 of the second steel pipe pile 2 is inserted into the first steel pipe pile 1, pressed down to secure it, and then a steel pad is placed. Based on the pressure gauge reading, if the upper bearing capacity is not met, pile splicing and driving continue until the upper load is met.

[0059] 4.2.5 Replacement Based on the pressure gauge reading, when the design requirements are met, the jack is supported by the jack bracket. Then, the jack pile is installed in the center of the pile. A steel plate is installed on the upper part of the last section of the secondary steel pipe pile 2 and welded firmly.

[0060] 4.2.6 Concrete pouring and backfilling Concrete pouring and backfilling inside the first section of steel pipe pile 1 and the second section of steel pipe pile 2: Plain concrete is poured for the operating pit below the foundation bottom elevation to form a pile cap; the guide pit is backfilled to the ground and the site is cleaned up.

[0061] It should be noted that, apart from the operation of the closed-type internally ribbed steel pipe pile itself, the operation of excavating pilot tunnels and setting out pile positions are mature technologies.

[0062] The above technical solutions are only preferred embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art without creative effort within the technical scope disclosed in this utility model are covered within the protection scope of this utility model.

Claims

1. A closed-type internally ribbed socket steel pipe pile, characterized in that, It includes a first section of steel pipe pile (1) and at least one second section of steel pipe pile (2) that are coaxially connected. The first section of the steel pipe pile (1) includes a first steel pipe (1-1), which is closed at one end and open at the other end; The secondary steel pipe pile (2) includes a second steel pipe (2-1), which has open ends; The second steel pipe (2-1) has several inner ribs (2-2) installed on one of its open ends. The inner ribs are arranged circumferentially along the inner side of the end of the second steel pipe (2-1) and extend out of the open end of the second steel pipe (2-1). The end of the secondary steel pipe pile (2) with the inner rib plate (2-2) is fitted with the open end of the first steel pipe pile (1); The end of the secondary steel pipe pile (2) with the inner rib plate (2-2) is fitted with the end of the adjacent secondary steel pipe pile (2) excluding the inner rib plate (2-2).

2. The closed-type internally ribbed socket steel pipe pile as described in claim 1, characterized in that, The first steel pipe (1-1) is closed at one end by a sealing plate (1-2), which is circular. The sealing plate (1-2) is equipped with a cross rib plate (1-3) on the side facing away from the first steel pipe (1-1). The cross rib plate (1-3) includes a first cross rib plate (1-3-1) and a second cross rib plate (1-3-2) arranged vertically, and both the first cross rib plate (1-3-1) and the second cross rib plate (1-3-2) are perpendicular to the sealing plate (1-2).

3. A closed-type internally ribbed socket steel pipe pile as described in claim 2, characterized in that, The lengths of the first cross rib (1-3-1) and the second cross rib (1-3-2) are the same as the outer diameter of the first steel pipe (1-1).

4. A closed-type internally ribbed socket steel pipe pile as described in claim 2, characterized in that, The first steel pipe (1-1) and the second steel pipe (2-1) have a diameter of 400 mm, a wall thickness of 12 mm, and a length of 1200 mm. The sealing plate (1-2) is 12mm thick; The inner rib plate (2-2) is 200mm long, 100mm high, and 12mm thick; The inner rib plate (2-2) is welded 50 mm long to the inner side of the end of the second steel pipe (2-1), and the remaining length extends out of the end of the second steel pipe (2-1).

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