Underwater pouring and pile hole synchronous backfilling device for concrete filled steel tubular column

Abstract

The utility model relates to the technical field of steel pipe concrete construction, in particular to an underwater pouring and pile hole synchronous backfilling device for a steel pipe concrete column, which is characterized in that a concrete pouring funnel and a gravel pouring funnel are coaxially arranged at the axis position of a pile hole, and a steel pipe is sleeved on the outer side of a funnel mouth of the concrete pouring funnel; the bottom end of the steel pipe extends to a reinforcement cage at the bottom of the pile hole, and a pouring face positioning device is arranged between the gravel pouring funnel and the inner wall of the pile hole. The pouring surface positioning device comprises a dynamometer, a measuring rope and a measuring rope hoist, one end of the measuring rope is connected with the dynamometer, and the other end of the measuring rope is connected with the measuring rope hoist located between the steel pipe and the pile hole. According to the utility model, the ascending height of the concrete pouring surface outside the steel pipe in the pile hole is monitored in real time by arranging the pouring surface positioning device. When the liquid level of concrete is in contact with the hoisting weight of the measuring rope, the buoyancy change is transmitted to the dynamometer through the measuring rope, and the dynamometer automatically judges whether a pouring surface reaches a preset elevation or not based on a preset threshold value.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of steel pipe concrete construction, especially to a steel pipe concrete column underwater pouring and pile hole synchronous backfilling device. BACKGROUND

[0002] The steel pipe concrete column is a vertical support arranged in advance, has superhigh vertical bearing capacity, and is often applied to foundation pit trestle columns, columns in cover-trench-cut method and half cover-trench-cut method and other foundation pit projects with superlarge vertical bearing demand.

[0003] The steel pipe concrete column adopts a column and a foundation in a matching mode, the foundation is a reinforced concrete pile, the pile diameter is generally 300-500mm larger than the column diameter, the steel pipe is embedded in the pile foundation, and the steel pipe also needs to be poured with concrete. The conventional construction technology includes a pile foundation first steel pipe column later insertion method and a foundation reinforcement cage and steel pipe integrated hoisting and pouring method: the former refers to that the pile foundation is first constructed to the design position, then the steel pipe is inserted into the pile foundation before the pile foundation concrete is initially cured by using special machinery, and the concrete is poured in the steel pipe, finally the sand and stone outside the steel pipe column in the pile hole is backfilled, the construction precision is high, and the method is often used in structures that are used as permanent columns in reverse construction method, but the construction period is long and the cost is high; the latter refers to that the pile hole is formed, the reinforcement cage and the steel pipe are hoisted synchronously, then the concrete is poured underwater, until the concrete in the steel pipe is poured to the top of the pipe, finally the sand and stone outside the steel pipe column in the pile hole is backfilled, the pouring height of the concrete outside the steel pipe in the pile hole cannot be accurately determined, on the one hand, too much concrete is poured, on the other hand, the concrete outside the steel pipe needs to be chipped after the foundation pit is excavated, which brings additional construction content, and the vibration caused by chipping may affect the safety of the steel pipe bearing. Therefore, it is necessary to provide a steel pipe concrete column construction device to control the pouring elevation of the concrete at the top of the pile, and a construction method that does not affect the pouring of the concrete in the steel pipe. UTILITY MODEL CONTENTS

[0004] (I) Technical problem to be solved

[0005] The utility model provides a steel pipe concrete column underwater pouring and pile hole synchronous backfilling device, aims at solving how to effectively control the pouring elevation of the concrete at the top of the pile in the steel pipe concrete pouring process.

[0006] (II) Technical scheme

[0007] In order to achieve the above object, the utility model provides a steel pipe concrete column underwater pouring and pile hole synchronous backfilling device, which comprises a concrete pouring hopper, a sand and stone pouring hopper and a pouring surface positioning device.

[0008] The concrete pouring funnel and the sand and gravel pouring funnel are coaxially arranged at the axis of the pile hole. The concrete pouring funnel is set inside the sand and gravel pouring funnel through the steel pipe of the pile hole, and the concrete pouring funnel extends to the bottom of the pile hole. The pouring surface positioning device is set between the sand and gravel pouring funnel and the inner wall of the pile hole.

[0009] The grouting surface positioning device includes a force measuring instrument, a measuring rope, and a measuring rope weight. One end of the measuring rope is connected to the force measuring instrument, and the other end is connected to the measuring rope weight located between the steel pipe and the pile hole. When the concrete grouting surface reaches the preset position, the force measuring instrument positions the grouting surface by measuring the force change of the measuring rope weight.

[0010] A further technical solution includes a positioning frame; the positioning frame is fixedly installed at the pile hole inlet, and its central axis is collinear with the axis of the pile hole. The upper surface of the positioning frame is in contact with the outer surface of the sand and gravel injection funnel to ensure that the sand and gravel injection funnel is coaxial with the pile hole.

[0011] A further technical solution is that the positioning frame is a square frame or an annular frame. When it is a square frame, the diameter of its inscribed circle is larger than the diameter of the pile hole, and the difference ranges from 100 to 200 mm. When it is an annular frame, the diameter of its inner annular circle is larger than the diameter of the pile hole, and the difference ranges from 100 to 200 mm.

[0012] A further technical solution is that the cross-sectional shape of the sand and gravel injection funnel body matches the shape of the notch inside the positioning frame, and the diameter of the funnel nozzle of the sand and gravel injection funnel satisfies the following: less than the diameter of the pile hole by 10-50mm and greater than the diameter of the steel pipe by more than 200mm.

[0013] A further technical solution is that a steel grid cover plate is installed on the top of the sand and gravel injection funnel. The steel grid cover plate is a grid structure composed of transverse and longitudinal steel bars, and the grid size is adapted to the maximum particle passage requirements of the backfilled sand and gravel.

[0014] A further technical solution is that a steel pipe through hole is opened in the center of the steel bar grid cover plate, and the steel pipe passes through the steel pipe through the through hole and is clearance-fitted with the hole wall of the steel pipe through hole.

[0015] A further technical solution is that the cross-section of the concrete pouring funnel is circular, and the diameter at the largest cross-section is larger than the diameter of the steel pipe, so that the concrete pouring funnel can be erected at the top opening of the steel pipe.

[0016] A further technical solution is that the steel pipe extends into the inside of the reinforcing cage and forms an axially overlapping section with the reinforcing cage.

[0017] A further technical solution is that the force gauge is detachably installed on the upper surface of the positioning frame by means of snap-fit ​​or bolt connection; after the injection surface is positioned, the force gauge can be separated and recycled from the positioning frame, and the installation interface reserved on the upper surface of the positioning frame forms a temporary fixed fit with the bottom slot or flange of the force gauge.

[0018] (III) Beneficial Effects

[0019] This invention utilizes a grouting surface positioning device to monitor the rise of the concrete grouting surface outside the steel pipe in the pile hole in real time. When the concrete surface contacts the weight suspended by the measuring rope, the change in buoyancy is transmitted to a force measuring instrument via the rope. The force measuring instrument automatically determines whether the grouting surface has reached the preset elevation based on a preset threshold. This technical solution replaces traditional manual measurement or experience-based estimation methods, greatly improving positioning accuracy and completely preventing concrete overflow outside the steel pipe in the pile hole due to over-pouring. It also eliminates structural damage to the connection between the steel pipe and the reinforcing cage caused by removing excess concrete later, ensuring the load-bearing capacity and durability of the steel-concrete composite column.

[0020] The simultaneous concrete pouring and aggregate backfilling are achieved through a coaxial arrangement of two funnels. The concrete pouring funnel directly guides concrete into the reinforcing cage through a steel pipe, while the aggregate backfilling funnel synchronously fills the pile hole with aggregate along the annular gap between the pile hole and the steel pipe. The real-time feedback function of the pouring surface positioning device allows operators to start aggregate backfilling as soon as the concrete reaches the preset elevation, eliminating the need to wait for the concrete to initially set or for manual verification. This significantly improves work continuity and saves production time.

[0021] In addition, the device reduces material waste by about 15%-20% by precisely controlling the amount of concrete poured. The device does not require an external power supply or complex sensors, and relies solely on a mechanical-mechanical feedback mechanism. It is suitable for extreme construction environments such as deep water, high flow velocity, or severe electromagnetic interference, thus expanding the application scenarios of steel-concrete composite piles in major projects such as cross-sea bridges and deep-sea platforms. Attached Figure Description

[0022] Fig. 1 A schematic diagram of the overall structure of the underwater grouting and synchronous backfilling device for steel-concrete composite columns.

[0023] Fig. 2 This is a plan view of a steel grating cover plate;

[0024] Fig. 3 This is a three-dimensional schematic diagram of the positioning frame.

[0025] [Explanation of Labels in the Attached Image]

[0026] 1: Concrete pouring funnel; 2: Sand and gravel pouring funnel; 3: Pouring surface positioning device; 31: Force gauge; 32: Measuring rope; 33: Measuring rope suspension weight; 4: Pile hole; 5: Steel pipe; 6: Reinforcing cage; 7: Positioning frame; 8: Reinforcing grid cover plate. Detailed Implementation

[0027] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] This embodiment provides a device for underwater grouting of steel-concrete composite columns and synchronous backfilling of pile holes 4, such as... Figs. 1-3 As shown, it includes a concrete pouring funnel 1, a sand and gravel pouring funnel 2, and a pouring surface positioning device 3;

[0029] Concrete pouring funnel 1 and gravel pouring funnel 2 are coaxially positioned along the axis of pile hole 4. Concrete pouring funnel 1 is positioned inside gravel pouring funnel 2 via steel pipe 5 of the pile hole, and extends to the bottom of the pile hole. A pouring surface positioning device 3 is installed between gravel pouring funnel 2 and the inner wall of pile hole 4. The pouring surface positioning device 3 includes a force gauge 31, a measuring rope 32, and a measuring rope weight 33. One end of the measuring rope 32 is connected to the force gauge 31, and the other end is connected to the measuring rope weight 33 located between steel pipe 5 and pile hole 4. When the concrete pouring surface reaches a preset position, the force gauge 31 positions the pouring surface by measuring the force change of the measuring rope weight 33.

[0030] In the above examples, it's important to explain that concrete-in-steel pipe is a composite structural material where concrete is poured into and compacted within a steel pipe to increase the strength and rigidity of the steel. Concrete-in-steel pipe is a composite material composed of metallic steel and inorganic non-metallic concrete. By pouring and compacting the concrete into the steel pipe, the strength and rigidity of the steel are enhanced. This structural material combines the strength of steel with the compressive strength of concrete and is widely used in building structures. Underwater pouring refers to the method of pouring concrete through a vertical pipe, relying on the concrete's own weight. It is also called tremie concrete or underwater concrete pouring. It's important to note that during the concrete pouring process, the water inside the pile hole 4 is gradually pushed out of the pile hole 4 by the concrete or gravel. The concrete pouring funnel 1 and the gravel pouring funnel 2, as the main pouring and backfilling devices, must have a certain load-bearing capacity and are preferably made of steel. This device uses a pouring surface positioning device 3 to monitor the rise of the concrete pouring surface outside the steel pipe 5 inside the pile hole 4 in real time. When the concrete surface contacts the weight 33 suspended by the measuring rope, the change in buoyancy is transmitted to the force measuring instrument 31 through the measuring rope 32. The force measuring instrument 31 automatically determines whether the pouring surface has reached the preset elevation based on a preset threshold. This technical solution replaces traditional manual measurement or experience-based estimation methods, greatly improving positioning accuracy and completely avoiding concrete overflow from the outside of the steel pipe 5 inside the pile hole 4 due to over-pouring. It also eliminates structural damage to the connection node between the steel pipe 5 and the reinforcing cage 6 caused by removing excess concrete later, ensuring the load-bearing capacity and durability of the steel-concrete composite column. The synchronous arrangement of concrete pouring and backfilling is achieved through a double-funnel coaxial arrangement. The concrete pouring funnel 1 directly guides concrete into the interior of the reinforcing cage 6 through the steel pipe 5, while the sand and gravel pouring funnel 2 synchronously backfills sand and gravel aggregate along the annular gap between the pile hole 4 and the steel pipe 5. The real-time feedback function of the pouring surface positioning device 3 allows operators to start backfilling as soon as the concrete reaches the preset elevation, without waiting for the initial setting of the concrete or manual verification, greatly improving work continuity and saving production time.

[0031] In this embodiment, a positioning frame 7 is also included. The positioning frame 7 is a square frame, and the steel sections constituting the square frame are all square. The cross-sectional dimensions are adjusted according to the load-bearing capacity. The positioning frame 7 is constructed by welding or bolting steel. The diameter of its inscribed circle is 1000mm, which is also the diameter of the inscribed circle of the pile hole 4, which is 1000mm. Alternatively, a ring frame can be used. Specifically, the positioning frame 7 is fixedly installed at the entrance of the pile hole 4, with its central axis collinear with the axis of the pile hole 4. The upper surface of the positioning frame 7 is in contact with the outer surface of the sand and gravel injection funnel 2 to ensure that the sand and gravel injection funnel 2 and the pile hole 4 are coaxial. By ensuring the collinearity of the central axis of the positioning frame 7 with the axis of the pile hole 4, and by ensuring the contact between the upper surface of the positioning frame 7 and the outer surface of the sand and gravel injection funnel 2, the coaxiality of the sand and gravel injection funnel 2 and the pile hole 4 can be precisely guaranteed. This avoids uneven distribution of sand and gravel caused by funnel displacement during injection, thereby improving the accuracy and quality of backfilling. The positioning frame 7, as a fixing device, not only ensures the stability of the sand and gravel grouting funnel 2, but also provides additional support for the entire grouting system through its rigidity and strength, which helps to prevent the funnel from shaking or tilting during the grouting process, and further ensures the safety and stability of the construction.

[0032] Specifically, in this embodiment, the cross-sectional shape of the sand and gravel injection funnel 2 matches the shape of the notch inside the positioning frame 7, both being square. The diameter of the funnel nozzle of the sand and gravel injection funnel 2 is 800mm, adjusted according to the pile hole diameter, slightly smaller than the pile hole diameter. The matching of the cross-sectional shape of the funnel body with the shape of the notch inside the positioning frame 7 ensures the stability and accuracy of the sand and gravel injection funnel 2 on the positioning frame 7. This prevents the sand and gravel injection funnel 2 from shaking or shifting during the injection process, thus ensuring that the sand and gravel can be accurately injected into the annular gap between the pile hole 4 and the steel pipe 5.

[0033] Specifically, in this embodiment, the sand and gravel injection funnel 2 is welded from steel and must have a certain vertical load-bearing capacity. A reinforced steel grating cover plate 8 is installed on the top of the sand and gravel injection funnel 2. The reinforced steel grating cover plate 8 is a grid structure composed of horizontal and vertical steel bars, with the grid size adapted to the maximum particle size requirement of the backfilled sand and gravel. The reinforced steel grating cover plate 8 installed on the top of the sand and gravel injection funnel 2 further optimizes the aggregate grade configuration, preventing large-diameter particles from clogging the funnel or causing abnormal porosity in the backfill layer, ensuring a backfill density ≥95%, and avoiding stress concentration in the pile hole 4 due to uneven backfilling. It should be noted that the grating cover plate, as a sand and gravel injection grating, also serves as an operating platform for workers. Its planar dimensions are slightly larger than the top opening of the sand and gravel injection funnel 2. It is welded from steel bars or other steel materials and has a certain load-bearing capacity, capable of supporting the weight of 3-4 workers while ensuring unobstructed passage of sand and gravel.

[0034] Specifically, in this embodiment, a steel pipe through-hole is opened in the center of the reinforcing grating cover plate 8, and the steel pipe 5 passes through the through-hole and is fitted with the hole wall with a clearance fit. The steel pipe through-hole on the reinforcing grating cover plate 8 makes the position of the steel pipe 5 more accurate. The clearance fit not only ensures the accuracy of the position of the steel pipe 5, but also avoids installation difficulties or safety hazards caused by being too tight or too loose. At the same time, construction personnel can install the steel pipe 5 more quickly and conveniently, saving installation time.

[0035] Specifically, in this embodiment, the cross-section of the concrete pouring funnel 1 is circular, and the diameter at the largest cross-section is 600mm, which is adjusted according to the diameter of the steel pipe 5 so that the concrete pouring funnel 1 can be placed at the top opening of the steel pipe 5.

[0036] Specifically, in this embodiment, the steel pipe 5 extends into the interior of the reinforcing cage 6 and forms an axially overlapping section with the reinforcing cage 6 to improve the connection strength between the steel pipe concrete and the pile foundation, ensuring the integrity of the structure and obtaining better vertical bearing capacity.

[0037] Specifically, in this embodiment, the force gauge 31 is fixed to the outside of the pile hole rather than to the positioning frame 7. Preferably, the force gauge 31 is installed on the upper surface of the positioning frame 7 by bolt connection; after the grouting surface is positioned, the force gauge 31 can be separated and retrieved from the positioning frame 7, and the installation interface reserved on the upper surface of the positioning frame 7 forms a temporary fixed fit with the bottom flange of the force gauge 31. The force gauge 31 can be easily and quickly installed onto the positioning frame 7 by bolt connection, and can also be easily disassembled. The installation interface reserved on the upper surface of the positioning frame 7 forms a temporary fixed fit with the bottom flange of the force gauge 31, ensuring the stability and accuracy of the force gauge 31 during installation. This helps to reduce installation errors and improve the accuracy of grouting surface positioning.

[0038] The specific steps for constructing steel-concrete composite columns using the underwater grouting and synchronous backfilling device for pile hole 4 described in the above embodiment are as follows:

[0039] First, the diameter of the steel pipe column and the steel pipe column pile foundation is designed according to the structural load-bearing requirements. Then, the pile hole 4 is excavated according to the diameter. Next, the position of the steel pipe column is determined by the four-corner positioning tool. Then, the positioning frame 7 is hoisted and placed in the accurate position above the pile hole 4. Then, the steel cage 6 and steel pipe 5 are hoisted and fixed.

[0040] Next, the sand and gravel grouting funnel 2, the steel bar grid cover plate 8, the underwater concrete grouting conduit and grouting funnel, and the grouting surface positioning device 3 are installed in sequence. The depth of the measuring rope weight 33 in the grouting surface positioning device 3 is determined according to the planned elevation of the concrete over-grouting surface. After being lowered to the predetermined depth, it is connected to the force measuring instrument 31 and fixed in time to read the force measurement data.

[0041] Finally, concrete is poured along the concrete pouring funnel 1. When the amount of concrete poured is about to reach the calculated over-pouring level, the changes in the data of the force gauge 31 must be closely monitored, and the concrete pouring speed must be controlled. When the data of the force gauge 31 decreases and the measuring rope 32 clearly changes from a taut state to a slack state, it indicates that the concrete surface inside the pile hole 4 has reached the calculated over-pouring level. At this time, concrete pouring is paused, the measuring rope 32 is pulled out, and the backfilling of the pile hole 4 with sand and gravel is started. At the same time, concrete pouring is resumed to achieve a state where underwater concrete pouring and backfilling of the pile hole 4 are carried out synchronously. This state continues until the concrete surface inside the steel pipe column reaches the design elevation and the backfilling of the pile hole 4 with sand and gravel reaches the elevation of the hole opening. The construction of the steel pipe concrete column is thus completed.

[0042] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicator will also change accordingly.

[0043] In this embodiment, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0044] It should be understood that the above description of the specific embodiments of this utility model is only for illustrating the technical route and features of this utility model, and its purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. However, this utility model is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of this utility model should be covered by the protection scope of this utility model.

Claims

1. A device for underwater grouting of steel-concrete composite columns and synchronous backfilling of pile holes, characterized in that, It includes a concrete pouring funnel (1), a sand and gravel pouring funnel (2), and a pouring surface positioning device (3); The concrete pouring funnel (1) and the sand and gravel pouring funnel (2) are coaxially arranged at the axis position of the pile hole (4). The concrete pouring funnel (1) is set inside the sand and gravel pouring funnel (2) by means of the steel pipe (5) of the pile hole, and the concrete pouring funnel (1) extends to the bottom of the pile hole. The pouring surface positioning device (3) is set between the sand and gravel pouring funnel (2) and the inner wall of the pile hole (4). The grouting surface positioning device (3) includes a force measuring instrument (31), a measuring rope (32), and a measuring rope weight (33). One end of the measuring rope (32) is connected to the force measuring instrument (31), and the other end is connected to the measuring rope weight (33) located between the steel pipe (5) and the pile hole (4). When the concrete grouting surface reaches the preset position, the force measuring instrument (31) positions the grouting surface by measuring the force change of the measuring rope weight (33).

2. The underwater grouting and synchronous backfilling device for steel-concrete composite columns as described in claim 1, characterized in that, It also includes a positioning frame (7); The positioning frame (7) is fixedly installed at the entrance of the pile hole (4), and its central axis is collinear with the axis of the pile hole (4). The upper surface of the positioning frame (7) is in contact with the outer surface of the sand and gravel injection funnel (2) to ensure that the sand and gravel injection funnel (2) is coaxial with the pile hole (4).

3. The underwater grouting and synchronous backfilling device for steel-concrete composite columns as described in claim 2, characterized in that, The positioning frame (7) is a square frame or an annular frame. When it is a square frame, the diameter of its inscribed circle is greater than the diameter of the pile hole (4), and the difference ranges from 100 to 200 mm. When it is an annular frame, the diameter of its inner annular circle is greater than the diameter of the pile hole (4), and the difference ranges from 100 to 200 mm.

4. The underwater grouting and synchronous backfilling device for steel-concrete composite columns as described in claim 3, characterized in that, The cross-sectional shape of the sand and gravel injection funnel (2) matches the shape of the notch inside the positioning frame (7), and the diameter of the funnel nozzle of the sand and gravel injection funnel (2) satisfies the following: less than the diameter of the pile hole (4) by 10-50mm and greater than the diameter of the steel pipe (5) by more than 200mm.

5. The underwater grouting and synchronous backfilling device for steel-concrete composite columns as described in claim 1, characterized in that, The top of the sand and gravel filling funnel (2) is equipped with a steel grid cover plate (8), which is a grid structure composed of transverse and longitudinal steel bars, and the grid size is adapted to the maximum particle passage requirement of the backfilled sand and gravel.

6. The underwater grouting and synchronous backfilling device for steel-concrete composite columns as described in claim 5, characterized in that, A steel pipe (5) through hole is opened in the center of the steel bar grid cover plate (8), and the steel pipe (5) passes through the steel pipe (5) through hole and is clearance-fitted with the hole wall of the steel pipe (5).

7. The underwater grouting and synchronous backfilling device for steel-concrete composite columns as described in claim 1, characterized in that, The concrete pouring funnel (1) has a circular cross-section, and the diameter at the largest cross-section is larger than the diameter of the steel pipe (5), so that the concrete pouring funnel (1) can be placed at the top opening of the steel pipe (5).

8. The underwater grouting and synchronous backfilling device for steel-concrete composite columns as described in claim 1, characterized in that, The steel pipe (5) extends into the interior of the reinforcing cage (6) and forms an axially overlapping section with the reinforcing cage (6).

9. The underwater grouting and synchronous backfilling device for steel-concrete composite columns as described in claim 2, characterized in that, The force gauge (31) is detachably installed on the upper surface of the positioning frame (7) by means of snap-fit ​​or bolt connection; after the injection surface is positioned, the force gauge (31) can be separated and recycled from the positioning frame (7), and the installation interface reserved on the upper surface of the positioning frame (7) forms a temporary fixed fit with the bottom slot or flange of the force gauge (31).

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