Overwater cast-in-place pile operation platform

Abstract

The utility model provides an overwater cast-in-place pile operation platform. The platform comprises a plurality of sub-platforms. The top ends of the steel pipe piles (1) are located on the same horizontal line, and the bottom ends of the steel pipe piles (1) are embedded into the underwater ground; the steel cover plate (2) covers the top ends of all the steel pipe piles (1); the longitudinal connecting rods (3) are arranged at intervals in the laying direction of the steel pipe piles (1); each longitudinal connecting rod (3) is located between every two adjacent steel pipe piles in the laying direction of the steel pipe piles (1). The main beams (4) are arranged in the laying direction of the steel pipe piles (1) and fixedly connected with the top faces of the steel pipe piles (1). And the plurality of sub-platforms are connected with one another through a plurality of transverse connecting rods (5). The water cast-in-place pile operation platform has the advantages that the structure is stable, the impact of water flow can be resisted, and the stability of the platform is kept.

Description

Technical Field

[0001] This application relates to the field of underwater construction technology, and in particular to an underwater cast-in-place pile operation platform. Background Technology

[0002] The complex geological conditions within the construction area necessitate the use of bored piles to ensure construction safety and progress. This technology provides a stable foundation, adapts to diverse geological conditions, and ensures the stability and durability of the project. However, in offshore engineering, bored piles are typically located 12 to 15 meters from the revetment, presenting additional challenges to the construction.

[0003] When conducting construction in water, the surface will fluctuate and flow, placing extremely high demands on the stability of the drilling rig. Typically, drilling rigs need to operate on a stable foundation, but the instability of the water surface can cause the rig to sway, affecting drilling accuracy and construction safety. Therefore, it is necessary to design a stable platform in the water to support the normal operation of the drilling rig. Utility Model Content

[0004] To solve the above-mentioned technical problems, the technical solution of this application provides a water-based cast-in-place pile operation platform, the platform comprising several sub-platforms;

[0005] The sub-platform includes:

[0006] A number of vertically placed steel pipe piles; the tops of the steel pipe piles are at the same horizontal line, and the bottoms are embedded in the underwater ground;

[0007] A steel cover plate covers the top of all the steel pipe piles and is fixedly connected to the top of the steel pipe piles.

[0008] A plurality of longitudinal connecting rods are spaced apart along the laying direction of the steel pipe piles; each longitudinal connecting rod is located between two adjacent steel pipe piles along the laying direction; one end of each longitudinal connecting rod is fixedly connected to the top end of the steel pipe pile, and the other end is fixedly connected to the bottom end of the steel pipe pile; every two adjacent longitudinal connecting rods form a V-shape; and

[0009] Several main beams are arranged along the laying direction of the steel pipe piles and are fixedly connected to the top surface of the steel pipe piles;

[0010] The sub-platforms are interconnected by a number of transverse links; the transverse links are fixedly connected to the top of a steel pipe pile on the side wall of each sub-platform in a direction perpendicular to the steel cover plate.

[0011] As an improvement to the aforementioned operating platform, the sub-platform also includes several connecting pieces;

[0012] Each of the main beams has its two ends located above the center of the top of two adjacent steel pipe piles along the laying direction of the steel pipe piles; each of the main beams is fixedly connected by a connecting piece.

[0013] As an improvement to the aforementioned work platform, the sub-platform also includes walkway slabs and several walkway slab supports;

[0014] The walkway slab support is fixedly connected to the side of the steel pipe pile; the walkway slab is fixed above the walkway slab support.

[0015] As an improvement to the aforementioned work platform, the sub-platform also includes a guardrail; the guardrail is fixed to the side of the walkway away from the steel cover plate.

[0016] As an improvement to the aforementioned work platform, the bottom end of the steel pipe pile is embedded 4.5-6m deep into the underwater ground.

[0017] Compared to existing technologies, the advantages of this application are:

[0018] 1. The structure of the water-based cast-in-place pile operation platform is stable and can resist the impact of water flow, maintaining the stability of the platform.

[0019] 2. The structure of the water-based cast-in-place pile operation platform is simple, which helps to reduce construction costs and improve construction efficiency.

[0020] 3. The platform is easy to set up and can be quickly installed and disassembled.

[0021] 4. The platform is equipped with safety facilities, such as guardrails and non-slip flooring, to ensure the safety of construction workers. Attached Figure Description

[0022] Figure 1 A schematic diagram of the overall structure of the platform.

[0023] Figure 2 This is a schematic diagram showing the connection between the steel pipe pile and the steel cover plate, the transverse connecting rod, and the longitudinal connecting rod.

[0024] Figure 3 A schematic diagram of the main beam connection;

[0025] Figure 4 A schematic diagram showing the welding of the walkway slab support to the steel pipe pile column;

[0026] Figure 5 This is a schematic diagram of the operation of the pull-out machine. Detailed Implementation

[0027] The technical solutions provided in this application are further illustrated below with reference to the embodiments.

[0028] Example 1

[0029] This embodiment provides a platform for underwater cast-in-place pile construction. For example... Figure 1 As shown, the platform comprises several sub-platforms. Each sub-platform includes several parallel steel pipe piles 1, steel cover plates 2, several longitudinal connecting rods 3, several main beams 4, and several connecting plates 8. Each sub-platform is connected to the others by several transverse connecting rods 5. Each sub-platform may optionally be equipped with walkway slab supports 6, walkway slabs 7, and guardrails.

[0030] In each sub-platform:

[0031] Several parallel steel pipe piles 1 are laid from the bank protection to the position required by the drilling rig; the tops of all steel pipe piles 1 are on the same horizontal line, and the bottoms are embedded in the underwater ground.

[0032] like Figure 2 As shown, a steel cover plate 2 covers the top of all steel pipe piles 1 and is welded to the top of all steel pipe piles 1. Several longitudinal connecting rods 3 are spaced apart along the laying direction of the steel pipe piles 1, located between two adjacent steel pipe piles along the laying direction of the steel pipe piles 1; wherein, one end of the first longitudinal connecting rod 3 is welded to the bottom side wall of the steel pipe pile 1, and the other end is welded to the top side wall of the steel pipe pile 1; one end of the second longitudinal connecting rod 3 is welded to the top side wall of the steel pipe pile 1, and the other end is welded to the bottom side wall of the steel pipe pile 1; every two adjacent longitudinal connecting rods 3 form a V-shape.

[0033] Several main beams 4 are installed along the laying direction of the steel pipe piles 1, wherein the two ends of each main beam 4 are located above the center position of the pile top of two adjacent steel pipe piles 1 along the laying direction of the steel pipe piles 1; several main beams 4 are welded to the top surface of the steel cover plate 2; two adjacent main beams 4 are fixedly connected by connecting pieces 8.

[0034] Multiple sub-platforms are connected by several transverse connecting rods 5 to form a water-based cast-in-place pile operation platform. For example... Figure 3 As shown, several horizontal connecting rods 5 are horizontally arranged, and the two ends of each horizontal connecting rod 5 are welded to the top sidewalls of a pair of parallel steel pipe piles 1. If the working platform consists of multiple sub-platforms, then each horizontal connecting rod 5 is welded to the top sidewalls of multiple steel pipe piles 1.

[0035] Among the several sub-platforms of the water-based cast-in-place pile operation platform, one sub-platform can also be equipped with a walkway 7 for construction personnel to move around. For example... Figure 4 As shown, the walkway slab support 6 is welded to the sides of several steel pipe piles 1; the walkway slab 7 is installed above the walkway slab support 6. For construction safety, guardrails can also be installed on the sides of the walkway slab 7.

[0036] The 18 channel steels are evenly arranged along the laying direction of the steel pipe piles and welded to the main beam.

[0037] Preferably, the bottom end of the steel pipe pile 1 is embedded 4.5-6m into the underwater ground.

[0038] Example 2

[0039] This embodiment provides a method for constructing an underwater cast-in-place pile operation platform, used to construct the underwater cast-in-place pile operation platform provided in Embodiment 1, including:

[0040] Step 1: Drive steel pipe piles;

[0041] Step 2: Leveling the top of the steel pipe pile;

[0042] Step 3: Weld the steel cover plate;

[0043] Step 4: Weld the transverse connecting rod, the first longitudinal connecting rod, and the second longitudinal connecting rod;

[0044] Step 5: Weld the main beam;

[0045] Step 6: Install walkway support brackets, walkway panels, and guardrails.

[0046] Before step 1, the process also includes the fabrication, hoisting, and stacking of steel pipe piles. Specifically, steel pipes of the designed specifications are purchased and transported to the construction site by truck. Welding and fabrication are carried out in accordance with the relevant provisions of the "Technical Specifications for Highway Bridge and Culvert Construction". The connection between pipes is achieved using spliced ​​steel plates with connecting pieces of the designed specifications.

[0047] Lifting and stacking of steel pipe piles: Lifting is carried out using two lifting points, each located at a distance of 1 / 5 of the pile length from the pile tip. Steel pipe piles are transported using flatbed trucks. Connected steel pipe piles should be neatly stacked on the bank for easy construction. Different types and sizes of piles should be stacked separately according to their intended use. When piles need to be stacked for extended periods, multiple support points can be used. The number of layers of steel pipe piles should not exceed three.

[0048] Step 1 specifically includes: the driving and pulling machine is located on the top of the dike on the bank, the vibratory hammer and steel pipe pile are hoisted, and the vibratory hammer and the pile head of the steel pipe pile must be clamped with hydraulic clamps without gaps or looseness;

[0049] The vibratory hammer and steel pipe piles are slowly moved to the designated pile positions. After the surveyors measure the pile spacing (1m-1.5m) and verticality, the vibratory hammer and steel pipe piles are slowly lowered to the riverbed. After the surveyors measure the pile spacing and verticality again and confirm that they are correct, the lowering begins. Every meter of vibration and lowering is followed by a remeasurement of the pile spacing and verticality. If the steel pipe piles are tilted, they are promptly pulled and corrected. Once the measurements are confirmed to be correct, the vibration and lowering continues.

[0050] Each pile is driven continuously with vibration until the pile driving is completed. The pile should be driven at a constant speed without interruption to avoid disturbing the soil around the pile and causing difficulties in pile driving. When the final sinking speed (4.5m / min) is not far from the calculated value and the amplitude meets the requirements, it is considered qualified. During the construction process, the designed pile length and the grouting depth (5-10mm) are used for dual control.

[0051] Step 2 specifically includes: after each steel pipe pile is driven, the top elevation of the pile is determined according to the design requirements, the steel pipe pile is leveled, the part that is higher than the elevation is cut off with oxyacetylene welding, and the pile that is lower than the elevation is extended to the top elevation according to the actual length.

[0052] Step 3 specifically includes: after leveling the top of the steel pipe pile, welding a steel cover plate to the top of the steel pipe pile (the planar dimensions of the steel cover plate will also change accordingly when using steel pipe piles of different diameters). The steel cover plate must be fully welded to the surrounding area and ensure that the steel cover plate is level.

[0053] Step 4 specifically includes: welding longitudinal and transverse connecting rods to the steel pipe pile body; the plurality of transverse connecting rods are horizontally arranged, with each transverse connecting rod having its two ends welded to the top sidewalls of a pair of parallel steel pipe piles; the first longitudinal connecting rod and the second longitudinal connecting rod are spaced apart along the laying direction of the steel pipe piles, respectively located between two adjacent steel pipe piles along the laying direction; wherein, the first end of the first longitudinal connecting rod is welded to the bottom sidewall of the steel pipe pile, and the second end of the first longitudinal connecting rod is welded to the top sidewall of the steel pipe pile; the first end of the second longitudinal connecting rod is welded to the top sidewall of the steel pipe pile, and the second end of the second longitudinal connecting rod is welded to the bottom sidewall of the steel pipe pile; adjacent first and second longitudinal connecting rods form a V-shape. That is, the longitudinal connecting rod changes direction every other span, forming a "W" shape inside, so that a scissor bracing is formed between each pair of adjacent holes; the transverse connecting rods are arranged in an "alternate one" manner to keep the transverse connecting rods on the same horizontal plane as much as possible. After welding is completed, it is essential to strictly control the welding quality. After welding, check whether the weld meets the requirements. If the welding is poor or weak, it is required to re-weld.

[0054] Step 5 specifically includes: after the steel cover plate on the pile top is welded, the square steel main beam is lifted and lowered to the top of the steel pipe pile using a crane, such as... Figure 5 As shown, when positioning the pile to the center, adjust the level and weld it to the steel cover plate after inspection. For the connection between two adjacent longitudinal main beams, two connecting plates of the designed specifications need to be welded to ensure the connection quality. After the longitudinal main beams are installed, channel steel is used to densely distribute the beams perpendicular to the main beams. The channel steel is hoisted onto the main beams and positioned with a net spacing of no more than 20cm. Then, the distribution beams are welded to the main beams.

[0055] Step 6 specifically includes: installing walkway slab supports; the walkway slab supports are made of square steel welded to the steel pipe pile columns, and wooden walkway slabs are laid directly on the longitudinal beams. The panels are installed flat, and there should be no misalignment in the middle. Steel pipes are welded to both sides of the temporary bridge and around the drilling platform, and steel bars are used to surround the area every 0.5m in height, spot-welded to the steel pipes. The uprights and crossbars of the bridge deck guardrails are all made of welded steel pipes. The spacing between the uprights and the length of the uprights are in accordance with the design requirements. Longitudinally, continuous steel pipes are used to connect the uprights, and two vertical lines are set. The guardrail steel pipes are painted with alternating red and white warning colors, and steel plates are welded to the bottom of the guardrails as kickboards, painted with alternating red and white warning colors.

[0056] After the pile foundation construction is completed, the dismantling of the water-based operating platform begins. The dismantling steps are the reverse of the erection steps, specifically:

[0057] (1) First, remove all the ancillary structures on the bridge deck;

[0058] (2) Remove the guardrails and walkway panels;

[0059] (3) Remove the closely spaced channel steel distribution beams;

[0060] (4) Remove the square steel main beam;

[0061] (5) Remove the horizontal and vertical railings;

[0062] (6) Pull out the steel pipe pile;

[0063] (7) Move to the next construction site.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application, and should all be covered within the scope of the claims of this application.

Claims

1. A platform for underwater cast-in-place pile operation, characterized in that, The platform includes several sub-platforms; The sub-platform includes: A number of vertically placed steel pipe piles (1); the tops of the steel pipe piles (1) are at the same horizontal line and the bottoms are embedded in the underwater ground; A steel cover plate (2) covers the top of all the steel pipe piles (1) and is fixedly connected to the top of the steel pipe piles (1); A plurality of longitudinal connecting rods (3) are spaced apart along the laying direction of the steel pipe piles (1); each longitudinal connecting rod (3) is located between two adjacent steel pipe piles along the laying direction of the steel pipe piles (1); one end of the longitudinal connecting rod (3) is fixedly connected to the top end of the steel pipe pile (1), and the other end is fixedly connected to the bottom end of the steel pipe pile (1); every two adjacent longitudinal connecting rods (3) form a V-shape; and Several main beams (4) are arranged along the laying direction of the steel pipe piles (1) and are fixedly connected to the top surface of the steel pipe piles (1); Several of the sub-platforms are interconnected by several transverse links (5); the transverse links (5) are fixedly connected to a steel pipe pile (1) of each sub-platform at the top of the side wall of the steel pipe pile (1) in a direction perpendicular to the steel cover plate (2).

2. The underwater cast-in-place pile operation platform according to claim 1, characterized in that, The sub-platform also includes several connecting pieces (8); Each of the main beams (4) has its two ends located above the center of the top of two adjacent steel pipe piles (1) along the laying direction of the steel pipe piles (1); each of the main beams (4) is fixedly connected by a connecting piece (8).

3. The underwater cast-in-place pile operation platform according to claim 1, characterized in that, The sub-platform also includes walkway slabs (7) and several walkway slab supports (6); The walkway support (6) is fixedly connected to the side of the steel pipe pile (1); the walkway (7) is fixed above the walkway support (6).

4. The underwater cast-in-place pile operation platform according to claim 3, characterized in that, The sub-platform also includes a guardrail; the guardrail is fixed to the side of the walkway (7) away from the steel cover plate (2).

5. The underwater cast-in-place pile operation platform according to claim 1, characterized in that, The bottom end of the steel pipe pile (1) is embedded 4.5-6m deep into the underwater ground.

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