Auxiliary construction structure for installing cast-in-place pile steel casing

Abstract

This invention relates to the field of steel casing installation technology, and more particularly to an auxiliary construction structure for installing cast-in-place pile steel casings, comprising several installation rods and connecting rods; all installation rods are connected together; and each installation rod is connected to at least four connecting rods. This invention enables the pre-positioning of the structure above the steel casing during backfilling. The "sealing plate," composed of extrusion rings and circular plates, seals the opening on the steel casing, preventing soil from falling into it. This avoids the problem of soil from the excavator bucket falling into the steel casing during backfilling, which would increase the soil content inside the casing and cause engineering deviations when placing the cast-in-place piles. Furthermore, multiple extrusion rings and circular plates can be combined to form a "sealing plate" matching the diameter of the steel casing, allowing for the sealing of steel casings of different diameters, making it highly practical.

Description

Technical Field

[0001] This invention relates to the field of steel casing installation technology, and in particular to an auxiliary construction structure for installing steel casings for cast-in-place piles. Background Technology

[0002] Before the construction of cast-in-place piles, steel casings are placed in the borehole to support it and prevent collapse. However, the borehole is usually larger than the steel casing, so after the steel casing is placed, an excavator is needed to backfill the area around it to ensure stability. During backfilling, some soil inevitably falls into the steel casing, affecting the soil content inside and causing deviations in the subsequent placement of the cast-in-place piles. Furthermore, during the compaction of the backfill area using the excavator bucket, the cylindrical shape of the steel casing makes it difficult for the bucket to fit snugly against the outer edge, resulting in some backfill soil not being compacted. Also, if the bucket is too close to the steel casing, it can easily collide with it and cause it to tilt. Summary of the Invention

[0003] To overcome the shortcomings of excavators backfilling soil and burying steel casings, such as soil easily falling into the casing, affecting the soil content inside the casing and causing engineering deviations when placing cast-in-place piles, and the excavator bucket failing to conform to the shape of the casing when compacting the backfill area, resulting in some backfill soil not being compacted, and the excavator bucket being too close to the casing, causing the casing to tilt, this invention provides an auxiliary construction structure for installing cast-in-place pile steel casings.

[0004] The technical implementation scheme of the present invention is as follows: an auxiliary construction structure for installing steel casing of cast-in-place piles, comprising a plurality of installation rods; all installation rods are connected together; each installation rod is fixedly connected to a fixing rope; it also includes connecting rods, compression rings, circular plates and pull ropes; each installation rod is inserted with at least four connecting rods; each connecting rod has at least two coaxial locking holes; each installation rod is inserted with at least four locking pins; each locking pin is inserted into the locking hole of the corresponding connecting rod; all installation rods are arranged in a ring; A set of connecting rods at the same position on the mounting rod are connected to a compression ring, and all compression rings are in contact with each other; the diameter of all compression rings increases outwards, with the outermost compression ring having the largest inner diameter; each connecting rod has a limit hole; all connecting rods on the same mounting rod are connected to a limit rod through the limit hole; all limit rods are connected to a circular plate; the outer diameter of the circular plate is the same as the inner diameter of the smallest compression ring; several connecting blocks are fixed to the circular plate; the connecting blocks are inserted into adjacent limit rods; several pull ropes are fixed to the circular plate.

[0005] More preferably, it also includes a connecting ring; all mounting rods are connected to the connecting ring.

[0006] More preferably, the locking pin is provided with a ball head.

[0007] More preferably, both the insertion end of the locking pin and both ends of the limiting rod are frustum-shaped.

[0008] More preferably, a counterweight is provided on the circular plate.

[0009] More preferably, the counterweight and the connecting ring are slidably connected.

[0010] More preferably, the free end of the fixing rope is provided with a hook.

[0011] More preferably, each pull rope passes through the corresponding mounting rod.

[0012] More preferably, a limit pin is fixed to the free end of each pull rope as it passes through the mounting rod.

[0013] More preferably, the upper surface of the circular plate is recessed.

[0014] Compared with the prior art, the present invention has the following advantages: When backfilling steel casing, the present invention is placed above the steel casing in advance. The "sealing plate" composed of extrusion rings and circular plates seals the opening on the steel casing, preventing soil from falling into the steel casing. This avoids the problem of some soil from the excavator bucket falling into the steel casing when the excavator backfills the soil, which would increase the soil content inside the steel casing and cause engineering deviations when placing the cast-in-place piles into the steel casing. At the same time, multiple extrusion rings and circular plates can be combined to form a "sealing plate" that matches the diameter of the steel casing, so as to seal steel casings of different diameters, which is highly practical.

[0015] Unlike simple methods of sealing steel casings with a covering, this invention combines a compression ring and a circular plate to form a "sealing plate" that matches the diameter of the steel casing. The remaining compression rings, independent of the outer side of the steel casing, together form a "compaction plate" that compacts the soil outside the steel casing. This achieves both sealing the opening in the steel casing and compacting the soil outside. In contrast, the compaction plate, with its inner side in contact with the outer side of the steel casing, ensures effective soil compaction and avoids the problem of the bucket being constrained by the casing's shape, making it difficult to fit the casing and preventing some backfill from being compacted. Furthermore, using the compaction plate prevents the bucket from colliding with the steel casing and causing it to tilt when compacting.

[0016] Meanwhile, in addition to sealing the opening on the steel casing and compacting the soil on the outside of the steel casing, the "sealing plate" used to seal the opening on the steel casing can also be used to compact the soil on the inside of the steel casing. This eliminates the need to replace the internal compaction equipment, improves construction efficiency, and saves engineering costs. Furthermore, multiple extrusion rings and circular plates can be combined to form a "sealing plate" that matches the inner diameter of the steel casing, thus compacting the soil inside steel casings of different inner diameters. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the auxiliary construction structure for installing the steel casing of the cast-in-place pile according to the present invention;

[0018] Figure 2 This is a diagram showing the state of the closed opening on the steel casing according to the present invention;

[0019] Figure 3 This is a diagram showing the state of the present invention: the opening on the closed steel casing is closed, and the compaction operation is being carried out.

[0020] Figure 4 This is a diagram showing the state of the closed opening on the steel casing and the compaction of the soil inside the steel casing according to the present invention.

[0021] The above-mentioned attached drawings include the following reference numerals: 1-installation rod, 101-fixing rope, 102-locking pin, 103-connecting ring, 2-connecting rod, 201-locking hole, 202-limiting hole, 203-limiting rod, 3-compression ring, 4-circular plate, 401-connecting block, 402-counterweight block, 5-pull rope, 1111-steel casing. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0023] like Figures 1-4 As shown, an auxiliary construction structure for installing a cast-in-place pile steel casing 1111 includes four installation rods 1; all installation rods 1 are connected together; and a fixing rope 101 is fixedly connected to each installation rod 1.

[0024] It also includes connecting rods 2, compression rings 3, circular plates 4, and pull ropes 5; each mounting rod 1 has four connecting rods 2 inserted into it; each connecting rod 2 has two coaxial locking holes 201; each mounting rod 1 has four locking pins 102 inserted into it; each locking pin 102 is inserted into the corresponding locking hole 201 of the connecting rod 2; all mounting rods 1 are arranged in a ring; all connecting rods 2 at the same position on all mounting rods 1 are connected to a compression ring 3, and all compression rings 3 are in contact with each other; all compression rings 5 ​​are connected to a compression ring 3. The diameter of the compression ring 3 increases outwards, with the outermost compression ring 3 having the largest inner diameter; each connecting rod 2 has a limiting hole 202; all connecting rods 2 on the same mounting rod 1 are connected to a limiting rod 203 through the limiting hole 202; all limiting rods 203 are connected to a circular plate 4; the outer diameter of the circular plate 4 is the same as the inner diameter of the smallest compression ring 3; eight connecting blocks 401 are fixedly connected to the circular plate 4; the connecting blocks 401 are inserted into the adjacent limiting rods 203; four pull ropes 5 are fixedly connected to the circular plate 4.

[0025] It also includes a connecting ring 103; all mounting rods 1 are connected to the connecting ring 103; by applying pressure to the connecting ring 103, the pressure is evenly transmitted to each mounting rod 1, ensuring that the present invention applies uniform extrusion force to the land.

[0026] The locking pin 102 is provided with a ball head, which is held by an assistant to facilitate the movement of the locking pin 102.

[0027] The insertion end of the locking pin 102 and both ends of the limiting rod 203 are frustoconical, which facilitates the insertion and removal of the locking pin 102 and the limiting rod 203.

[0028] A counterweight 402 is provided on the circular plate 4 to increase the weight of the circular plate 4 and increase the compaction effect of the circular plate 4 on the soil inside the steel casing 1111.

[0029] The counterweight 402 is slidably connected to the connecting ring 103, and the counterweight 402 and the connecting ring 103 form a movement restriction, which increases the stability of the present invention.

[0030] The free end of the fixing rope 101 is equipped with a hook, which makes it easy to quickly and conveniently fix the free end of the fixing rope 101 to the excavator boom.

[0031] The inner diameters of the four extrusion rings 3 of this invention are set to 1m, 1.1m, 1.2m and 1.3m respectively. Taking the auxiliary backfilling construction of a steel casing 1111 with an outer diameter of 1.1m as an example, the specific operation steps are as follows:

[0032] After the excavator places the steel casing 1111 into the excavated pit, the present invention is tied to the excavator boom using fixing rope 101. The excavator then moves the present invention above the steel casing 1111. Assistants use instruments to measure and align the center of the present invention with the center of the steel casing 1111. The excavator then places the present invention onto the steel casing 1111. Afterwards, the fixing rope 101 is released, disconnecting the present invention from the excavator. At this point, as... Figure 2 As shown, the extrusion ring 3 with an inner diameter of 1m is placed on the upper side of the steel casing 1111. One end of the limiting rod 203 is inserted into the connecting rod 2 near the steel casing 1111, and the other end is inserted into the connecting block 401. That is, the extrusion ring 3 with an inner diameter of 1m and the circular plate 4 are connected to form a "sealing plate" to seal the upper part of the steel casing 1111.

[0033] Next, the excavator backfilled the area around the outer edge of the steel casing 1111 with soil; during the backfilling process, if... Figure 2 As shown, except for the compression ring 3 with an inner diameter of 1m, the other compression rings 3 are all upward and away from the upper end of the steel casing 1111. It should be noted that the distance between the mounting rod 1 and the other compression rings 3 and the ground is sufficient for the excavator bucket to move. That is, when the excavator bucket backfills the buried pit, the compression rings 3 and the mounting rod 1, which are larger than the outer diameter of the steel casing 1111, do not obstruct the bucket from backfilling the soil. At the same time, for a small number of areas near the steel casing 1111 that are difficult to backfill due to the shape of the bucket, the auxiliary personnel use shovels to backfill.

[0034] After backfilling is completed, as follows Figure 3 As shown, remove the locking pins 102 corresponding to all the compression rings 3, release the locking of all connecting rods 2 and mounting rods 1, and wait until the compression rings 3 with inner diameters of 1.1m, 1.2m, and 1.3m move downwards onto the backfill soil outside the steel casing 1111 (note that the compression ring 3 with an inner diameter of 1m is supported by the steel casing 1111 and remains stationary). At this time, the locking hole 201 at the upper end of the corresponding connecting rod 2 moves down to be directly aligned with the hole on the mounting rod 1. Then, the auxiliary personnel reinsert the locking pins 102 onto the mounting rod 1 to lock the compression rings 3 with inner diameters of 1.1m, 1.2m, and 1.3m and the corresponding connecting rods 2. Figure 3As shown, the inner side of the compression ring 3 with an inner diameter of 1.1m contacts the outer side of the steel casing 1111, thus restricting the relative position of the present invention and the steel casing 1111. Then, the excavator bucket strikes the connecting ring 103 downwards. The connecting ring 103 forces the compression rings 3 with inner diameters of 1.1m, 1.2m, and 1.3m to move downwards through the mounting rod 1, compressing the backfill soil outside the steel casing 1111 and compacting the soil. Since the connecting rod 2 corresponding to the compression ring 3 with an inner diameter of 1m is locked to the mounting rod 1, the compression ring 3 with an inner diameter of 1m and the circular plate 4 remain stationary. Then, the excavator boom is raised and the bucket is lowered again. This process is repeated multiple times to apply pressure to the connecting ring 103, compacting the backfill soil outside the steel casing 1111.

[0035] After the soil outside the steel casing 1111 is compacted, the compression rings 3 at 1.1m, 1.2m, and 1.3m are kept below the top of the steel casing 1111. Then, the pull rope 5 is connected to the excavator boom, and then... Figure 4 As shown, by moving the limiting rod 203 away from the circular plate 4, the connecting rods 2 corresponding to the compression rings 3 with inner diameters of 1.1m, 1.2m, and 1.3m are connected together to form a "compacting plate". At the same time, the connecting rod 2 corresponding to the compression ring 3 with an inner diameter of 1m is disconnected from the circular plate 4, and the circular plate 4 falls into the steel casing 1111, compressing the soil inside the steel casing 1111. The pull rope 5 moves down relative to the mounting rod 1, and then the excavator boom is raised. The circular plate 4 is lifted by the pull rope 5, and then the boom is lowered, so that the circular plate 4 falls back into the steel casing 1111, compacting the soil inside the steel casing 1111.

[0036] It should be noted that when the backfill area outside the steel casing 1111 is greater than the coverage area of ​​the compression ring 3 with an inner diameter of 1.3m, the excess area is directly compressed by the excavator bucket, while the area close to the steel casing 1111 is compressed by each compression ring 3.

[0037] It should be noted that when performing auxiliary construction work on a steel casing 1111 with an inner diameter of 1.1m, the limiting rod 203 connects the compression rings 3 with inner diameters of 1m and 1.1m and the circular plate 4 together to form a "closed plate" to close the top of the steel casing 1111 with an inner diameter of 1.1m. When performing auxiliary construction work on steel casings 1111 with inner diameters of 1.2m and 1.3m, the same applies, connecting multiple compression rings 3 and circular plates 4 together to form a "closed plate". When performing auxiliary construction work on steel casings 1111 with an inner diameter exceeding 1.3m, compression rings 3 of corresponding size can be directly added to the mounting rod 1 to form a "closed plate" with the circular plate 4 to close the top of the steel casing 1111. When performing auxiliary construction work on steel casings 1111 with an inner diameter exceeding 1.3m, in addition to adding compression rings 3 of corresponding size to the mounting rod 1, compression rings 3 for compacting the soil are also added.

[0038] It should be noted that when multiple extrusion rings 3 and circular plates 4 are connected together to form a "closed plate" for auxiliary construction work on the steel casing 1111, the auxiliary personnel move the limiting rod 203 towards the circular plate 4 so that the extrusion rings 3 on the steel casing 1111 are not connected to the circular plate 4. Multiple extrusion rings 3 and circular plates 4 smaller than the inner diameter of the steel casing 1111 are connected together to compact the soil inside the steel casing 1111.

[0039] Based on the above steps, we can see that the present invention has the following effects:

[0040] When backfilling the steel casing 1111, the present invention is placed above the steel casing 1111 in advance. The "sealing plate" composed of the extrusion ring 3 and the circular plate 4 seals the opening on the steel casing 1111, preventing soil from falling into the steel casing 1111. This avoids some soil from the excavator bucket falling into the steel casing 1111 when the excavator is backfilling the soil, which would increase the soil content inside the steel casing 1111 and cause engineering deviations when placing the cast-in-place piles into the steel casing 1111. At the same time, multiple extrusion rings 3 and circular plates 4 can be combined to form a "sealing plate" that matches the diameter of the steel casing 1111, so as to seal steel casings 1111 of different diameters, which is highly practical.

[0041] Unlike simply sealing the steel casing 1111 with a covering, this invention combines the compression ring 3 and the circular plate 4 to form a "sealing plate" matching the diameter of the steel casing 1111. The remaining compression rings 3, independent of the outer side of the steel casing 1111, together form a "compaction plate" to compact the soil outside the steel casing 1111. This achieves both sealing the opening on the steel casing 1111 and compacting the soil outside. Unlike using a bucket for compaction, the inner side of the "compaction plate" contacts the outer side of the steel casing 1111, ensuring effective soil compaction and preventing the bucket from being restricted by the casing's shape, making it difficult to fit the casing and preventing some backfill soil from being compacted. Furthermore, using the "compaction plate" to compact the soil avoids the bucket easily colliding with the steel casing 1111 and causing it to tilt when compacting.

[0042] Meanwhile, in addition to sealing the opening on the steel casing 1111 and compacting the soil on the outside of the steel casing 1111, the "sealing plate" used to seal the opening on the steel casing 1111 can also be used to compact the soil on the inside of the steel casing 1111. This eliminates the need to replace the internal compaction equipment, improves construction efficiency, and saves engineering costs. Furthermore, multiple extrusion rings 3 and circular plates 4 can be combined to form a "sealing plate" that matches the inner diameter of the steel casing 1111, thus compacting the soil inside steel casings 1111 with different inner diameters.

[0043] In addition, after the present invention is placed on the steel casing 1111, the extrusion ring 3, which is larger than the outer diameter of the steel casing 1111, is moved down to contact the outside of the steel casing 1111. This allows the present invention to be limited by the extrusion ring 3 and the steel casing 1111, preventing the present invention from shifting during the compaction process and ensuring that the compaction work proceeds smoothly.

[0044] The additional technical effects of this invention are as follows:

[0045] like Figure 1 As shown, the insertion end of the locking pin 102 and both ends of the limiting rod 203 are set in a frustum shape to facilitate the insertion and removal of the locking pin 102 and the limiting rod 203.

[0046] like Figure 1 As shown, a counterweight 402 is provided on the circular plate 4 to increase the weight of the circular plate 4 and increase the compaction effect of the circular plate 4 on the soil inside the steel casing 1111. Example 2

[0047] Based on Example 1, such as Figure 1 and Figure 4 As shown, each pull rope 5 passes through the corresponding mounting rod 1.

[0048] Each pull rope 5 has a limit pin fixed to its free end as it passes through the mounting rod 1 to prevent the free end of the pull rope 5 from detaching from the mounting rod 1.

[0049] The present invention also has the following effects:

[0050] When the circular plate 4 compacts the soil inside the steel casing 1111, the excavator boom lifts the circular plate 4 using the pull ropes 5. Each pull rope 5 passes through the mounting rod 1, thus restricting the relative position of the circular plate 4 and the mounting rod 1. The relative position of each compression ring 3 with the mounting rod 1 is fixed, preventing the circular plate 4 from shifting significantly upwards and downwards inside the steel casing 1111. This would cause it to misalign with the compression ring 3 with the smallest inner diameter, resulting in the circular plate 4 being unable to return to its original position. Example 3

[0051] Based on Examples 1 and 2, such as Figure 1 and Figure 4 As shown, the upper surface of the circular plate 4 is set to be concave.

[0052] The present invention also has the following effects:

[0053] When the outer edge of the circular plate 4 is close to the inner wall of the steel casing 1111, the gap between them is small. When the circular plate 4 moves up and down, it is inevitable that it will shake. The backfill soil on the circular plate 4 will fall into the gap and easily get stuck in the gap, affecting the movement of the circular plate 4. Therefore, the upper surface of the circular plate 4 is set to be concave, so that the backfill soil that initially falls on the upper surface of the circular plate 4 gathers towards the middle of the circular plate 4, preventing it from falling out from the edge of the circular plate 4 and preventing the backfill soil on the circular plate 4 from falling into the gap and getting stuck in the gap, thus affecting the movement of the circular plate 4.

[0054] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. An auxiliary construction structure for installing steel casing of cast-in-place piles, comprising a plurality of installation rods (1); all installation rods (1) are connected together; and a fixing rope (101) is fixedly connected to each installation rod (1); characterized in that, It also includes connecting rods (2), compression rings (3), circular plates (4), and pull ropes (5); each mounting rod (1) is fitted with at least four connecting rods (2); each connecting rod (2) is provided with at least two coaxial locking holes (201); each mounting rod (1) is fitted with at least four locking pins (102); each locking pin (102) is fitted into the locking hole (201) of the corresponding connecting rod (2); all mounting rods (1) are arranged in a ring; the connecting rods (2) at the same position on all mounting rods (1) are connected to a compression ring (3), and all compression rings (3) are in contact with each other; The diameter of the compression rings (3) increases outwards, with the outermost compression ring (3) having the largest inner diameter; each connecting rod (2) has a limiting hole (202); all connecting rods (2) on the same mounting rod (1) are connected to a limiting rod (203) through the limiting hole (202); all limiting rods (203) are connected to a circular plate (4); the outer diameter of the circular plate (4) is the same as the inner diameter of the smallest compression ring (3); several connecting blocks (401) are fixed on the circular plate (4); the connecting blocks (401) are inserted into the adjacent limiting rods (203); several pull ropes (5) are fixed on the circular plate (4).

2. The auxiliary construction structure for installing steel casing of cast-in-place piles according to claim 1, characterized in that, It also includes a connecting ring (103); all mounting rods (1) are connected to the connecting ring (103).

3. An auxiliary construction structure for installing steel casing for cast-in-place piles according to claim 1, characterized in that, A ball head is provided on the locking pin (102).

4. An auxiliary construction structure for installing steel casing for cast-in-place piles according to claim 1, characterized in that, The insertion end of the locking pin (102) and both ends of the limiting rod (203) are frustum-shaped.

5. An auxiliary construction structure for installing steel casing for cast-in-place piles according to claim 1, characterized in that, A counterweight (402) is provided on the circular plate (4).

6. An auxiliary construction structure for installing steel casing for cast-in-place piles according to claim 5, characterized in that, The counterweight (402) is slidably connected to the connecting ring (103).

7. An auxiliary construction structure for installing steel casing for cast-in-place piles according to claim 1, characterized in that, The free end of the fixed rope (101) is equipped with a hook.

8. An auxiliary construction structure for installing steel casing for cast-in-place piles according to claim 1, characterized in that, Each pull rope (5) passes through the corresponding mounting rod (1).

9. An auxiliary construction structure for installing steel casing for cast-in-place piles according to claim 8, characterized in that, Each pull rope (5) has a limit pin fixed to its free end as it passes through the mounting rod (1).

10. An auxiliary construction structure for installing steel casing for cast-in-place piles according to claim 5, characterized in that, The upper surface of the circular plate (4) is set to be concave.

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