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

Abstract

The invention relates to the technical field of steel casing embedding construction, in particular to an auxiliary construction structure for mounting a cast-in-place pile steel casing, which comprises a plurality of mounting rods, connecting rods and the like, all the mounting rods are connected together; and at least four connecting rods are inserted into each mounting rod. When the steel casing is backfilled, the device is placed above the steel casing in advance, an upper opening of the steel casing is sealed through a sealing plate composed of an extrusion ring and a circular plate, soil is prevented from falling into the steel casing, and the situation that part of soil in an excavator bucket falls into the steel casing when an excavator is backfilled with the soil is avoided; the problem that engineering deviation occurs when a cast-in-place pile is placed in the steel casing in the follow-up process due to the fact that the soil content in the steel casing is increased is solved, meanwhile, the multiple extrusion rings and the circular plate can be combined together to form a sealing plate matched with the steel casing in diameter so as to seal the steel casings with different diameters, and practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of steel casing embedding construction, in particular to an auxiliary construction structure for installing a cast-in-place pile steel casing. Background Art

[0002] Before the construction of bored piles, in order to prevent the hole from collapsing, a steel casing must be placed in the hole to support the hole. The hole is usually larger than the steel casing, so after the steel casing is placed, an excavator is needed to backfill the outer periphery of the steel casing to ensure stability. However, during backfilling, some soil will inevitably fall into the steel casing, affecting the soil content inside the steel casing, causing engineering deviations in the subsequent placement of bored piles in the steel casing. Moreover, after the outer side of the steel casing is backfilled, the backfill area is compacted by the excavator bucket. However, since the steel casing is cylindrical, the bucket is restricted by its shape and it is difficult to fit the outer periphery of the steel casing, resulting in some backfill soil being unable to be compacted. In addition, the bucket is too close to the steel casing and easily collides with the steel casing, causing it to tilt. Summary of the Invention

[0003] In order to overcome the shortcomings that when an excavator backfills soil to bury a steel casing, soil easily falls into the steel casing, affecting the soil content inside the steel casing and causing engineering deviations in the subsequent placement of bored piles in the steel casing, and that when an excavator is used to compact the backfill area, the bucket is difficult to fit the outer shape of the steel casing, causing part of the backfill soil to be unable to be compacted, and the bucket is too close to the steel casing and easily collides with the steel casing, causing the steel casing to tilt, the present invention provides an auxiliary construction structure for the installation of bored pile steel casings.

[0004] The technical implementation scheme of the present invention is as follows: an auxiliary construction structure for installing a steel casing of a cast-in-place pile, comprising a plurality of installation rods; all the installation rods are connected together; a fixing rope is fixed to each installation rod; it also comprises a connecting rod, an extrusion ring, a circular plate and a pull rope; at least four connecting rods are plugged into each installation rod; each connecting rod is provided with at least two coaxial locking holes; at least four locking pins are plugged into each installation rod; each locking pin is plugged into the locking hole of the corresponding connecting rod; all the installation rods are distributed in a ring; The connecting rods at the same position on the mounting rod are connected to an extrusion ring, and all the extrusion rings are in contact with each other; the diameters of all the extrusion rings increase outward in sequence, and the inner diameter of the outermost extrusion ring is the largest; a limiting hole is provided on each connecting rod; all the connecting rods on the same mounting rod are connected to a limiting rod through the limiting hole; all the limiting rods are connected to a circular plate; the outer diameter of the circular plate is the same as the inner diameter of the smallest extrusion ring; a number of connecting blocks are fixed to the circular plate; the connecting blocks are connected to adjacent limiting rods; and a number of pull ropes are fixed to the circular plate.

[0005] More preferably, a connecting ring is further included; all the mounting rods are connected to the connecting ring.

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

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

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

[0009] More preferably, the counterweight is slidably connected to the connecting ring.

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

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

[0012] More preferably, the free end of each pull rope passing through the mounting rod is fixedly connected to a limiting pin.

[0013] More preferably, the upper surface of the circular plate is configured to be concave.

[0014] Compared with the prior art, the present invention has the following advantages: when backfilling the steel casing, the present invention is placed in advance above the steel casing, and the "closing plate" composed of the extrusion ring and the circular plate closes the opening on the steel casing to prevent soil from falling into the steel casing. This prevents part of the soil in the bucket from falling into the steel casing when the excavator backfills the soil, increasing the soil content inside the steel casing and causing engineering deviations when subsequently placing cast-in-place piles in the steel casing. At the same time, multiple extrusion rings and circular plates can be combined to form a "closing plate" that matches the diameter of the steel casing to close steel casings of different diameters, thereby having strong practicality. The difference is that the steel casing is simply closed by a covering. In the present invention, an extrusion ring and a circular plate are combined to form a "closing plate" that matches the diameter of the steel casing. The remaining extrusion rings independent of the outside of the steel casing jointly form a "compacting plate" for compacting the soil outside the steel casing. That is, while closing the opening on the steel casing, the soil outside the steel casing can also be compacted. The difference is that the bucket is used for compaction. The inner side of the "compacting plate" contacts the outer side of the steel casing to ensure the soil compaction effect and avoid the bucket being restricted by the shape of the steel casing and being difficult to fit the outer periphery of the steel casing, resulting in the problem that some backfill soil cannot be compacted. At the same time, the "compacting plate" is used to compact the soil to avoid the bucket approaching the steel casing for compaction work, which is easy to collide with the steel casing and cause it to be skewed; At the same time, in addition to achieving the purpose of closing the opening on the steel casing and compacting the soil on the outside of the steel casing, the "closing plate" used to close the opening on the steel casing can also be used to compact the soil on the inside of the steel casing, without the need to replace the internal compacting equipment, thereby improving construction efficiency and saving engineering costs. At the same time, multiple extrusion rings and circular plates can be combined together to form a "closing plate" that matches the inner diameter of the steel casing to compact the soil in steel casings with different inner diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the auxiliary construction structure for installing the steel casing of the bored pile according to the present invention; Figure 2 This is a state diagram of the opening on the steel casing being closed according to the present invention; Figure 3 This is a state diagram of the present invention in which the upper opening of the steel casing is closed and the compaction operation is performed; Figure 4 This is a diagram showing the state in which the opening on the steel casing is closed and the soil inside the steel casing is compacted.

[0016] Among them, the above-mentioned drawings include the following figure marks: 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-extrusion ring, 4-circular plate, 401-connecting block, 402-counterweight block, 5-pull rope, 1111-steel casing. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0018] like Figure 1-Figure 4 As shown, an auxiliary construction structure for installing a cast-in-place pile steel casing 1111 includes four installation rods 1; all the installation rods 1 are connected together; and each installation rod 1 is fixed with a fixing rope 101; The utility model also includes a connecting rod 2, an extrusion ring 3, a circular plate 4 and a pull rope 5; four connecting rods 2 are plugged into each installation rod 1; two coaxial locking holes 201 are provided on each connecting rod 2; four locking pins 102 are plugged into each installation rod 1; each locking pin 102 is plugged into the locking hole 201 of the corresponding connecting rod 2; all the installation rods 1 are distributed in a ring; the connecting rods 2 at the same position on all the installation rods 1 are connected to a common extrusion ring 3, and all the extrusion rings 3 are in contact with each other; all the extrusion rings 3 are in contact with each other; The diameters of the pressure rings 3 increase outwards, and the inner diameter of the outermost extrusion ring 3 is the largest; a limiting hole 202 is provided on each connecting rod 2; all connecting rods 2 on the same mounting rod 1 are commonly connected to a limiting rod 203 through the limiting hole 202; all limiting rods 203 are commonly connected to a circular plate 4; the outer diameter of the circular plate 4 is the same as the inner diameter of the smallest extrusion ring 3; eight connecting blocks 401 are fixed to the circular plate 4; the connecting blocks 401 are connected to adjacent limiting rods 203; four pull ropes 5 are fixed to the circular plate 4.

[0019] It also includes a connecting ring 103; all the installation rods 1 are connected to the connecting ring 103; by applying pressure to the connecting ring 103, the pressure is evenly transmitted to each installation rod 1, ensuring that the present invention applies uniform squeezing force to the ground.

[0020] The locking pin 102 is provided with a ball head, and an assistant holds the ball head to facilitate moving the locking pin 102 .

[0021] The insertion end of the locking pin 102 and both ends of the limiting rod 203 are both in a frustum shape, which facilitates the insertion and removal of the locking pin 102 and the limiting rod 203 .

[0022] A counterweight block 402 is provided on the circular plate 4 to increase the weight of the circular plate 4 and enhance the compacting effect of the circular plate 4 on the soil inside the steel casing 1111 .

[0023] The counterweight block 402 is slidably connected to the connecting ring 103 , and the counterweight block 402 and the connecting ring 103 form a movement restriction, thereby increasing the stability of the present invention.

[0024] The free end of the fixing rope 101 is provided with a hook, so that the free end of the fixing rope 101 can be quickly and conveniently fixed to the excavator boom.

[0025] The inner diameters of the four extrusion rings 3 of the present invention are set to 1m, 1.1m, 1.2m and 1.3m respectively. The following is an example of auxiliary backfill construction of a steel casing 1111 with an outer diameter of 1.1m. The specific operation steps are as follows: After the excavator places the steel casing 1111 in the excavated burial pit, the present invention is tied to the boom of the excavator through the fixing rope 101, and the excavator drives the present invention to move above the steel casing 1111. The assistant uses the instrument to measure so that the center of the present invention is aligned with the center of the steel casing 1111, and then directs the excavator to place the present invention on the steel casing 1111, and then unties the fixing rope 101 to release the connection between the present invention and the excavator. Figure 2 As shown, the extrusion ring 3 with an inner diameter of 1m of the present invention 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 close to 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 "closing plate" to seal the top of the steel casing 1111.

[0026] Then the excavator backfills the buried pit area on the outer edge of the steel casing 1111 with soil; Figure 2 As shown, except for the extrusion ring 3 with an inner diameter of 1m, the other extrusion rings 3 are all upward and away from the upper end of the steel casing 1111. It is explained here that the distance between the installation rod 1 and the other extrusion rings 3 and the ground is sufficient for the movement of the excavator bucket, that is, when the excavator bucket backfills the burial pit, the extrusion ring 3 and the installation rod 1 that are larger than the outer diameter of the steel casing 1111 do not block the bucket from backfilling the soil. At the same time, for a small area close to the steel casing 1111 that is difficult to backfill due to the shape of the bucket, auxiliary personnel use a shovel to backfill.

[0027] After backfilling is completed, Figure 3 As shown, remove the locking pins 102 corresponding to all the extrusion rings 3, release the locks of all the connecting rods 2 and the installation rod 1, and wait until the extrusion rings 3 with inner diameters of 1.1m, 1.2m and 1.3m are moved downward to the backfill soil outside the steel casing 1111 (it is explained here that the extrusion ring 3 with an inner diameter of 1m is supported by the steel casing 1111, and the extrusion ring 3 with an inner diameter of 1m remains stationary). At this time, the locking hole 201 at the upper end of the corresponding connecting rod 2 moves downward to be aligned with the hole on the installation rod 1, and then the assistant reinserts the locking pin 102 onto the installation rod 1 to lock the extrusion rings 3 with inner diameters of 1.1m, 1.2m and 1.3m and the corresponding connecting rod 2. At this time, Figure 3As shown, the inner side of the extrusion ring 3 with an inner diameter of 1.1m contacts the outer side of the steel casing 1111, so that the relative position of the present invention and the steel casing 1111 is restricted, and then the connecting ring 103 is knocked downward by the extrusion bucket of the extrusion machine. The connecting ring 103 forces the extrusion rings 3 with inner diameters of 1.1m, 1.2m and 1.3m to move downward through the mounting rod 1, squeezing the backfill soil outside the steel casing 1111 and compacting the soil. Since the connecting rod 2 corresponding to the extrusion ring 3 with an inner diameter of 1m stops locking with the mounting rod 1, the extrusion 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. The connecting ring 103 is repeatedly pressurized to compact the backfill soil outside the steel casing 1111.

[0028] After the soil outside the steel casing 1111 is compacted, keep the extrusion rings 3 at 1.1m, 1.2m and 1.3m lower than the upper side of the steel casing 1111, then connect the pull rope 5 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 extrusion rings 3 with inner diameters of 1.1m, 1.2m and 1.3m are connected together to form a "compaction plate", and at the same time, the connecting rod 2 corresponding to the extrusion 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, squeezing the soil in the steel casing 1111, and the pull rope 5 moves downward relative to the mounting rod 1, and then the excavator boom is lifted, and the circular plate 4 is lifted by the pull rope 5, and then the boom is lowered, so that the circular plate 4 falls into the steel casing 1111 again, compacting the soil in the steel casing 1111.

[0029] It should be noted that when the backfill area outside the steel casing 1111 is larger than the coverage area of ​​the extrusion ring 3 with an inner diameter of 1.3m, the excess area is directly compacted by the excavator bucket, while the position close to the steel casing 1111 is compacted by each extrusion ring 3.

[0030] It should be noted that when performing construction auxiliary operations on a steel casing 1111 with an inner diameter of 1.1m, the limiting rod 203 connects the extrusion rings 3 with inner diameters of 1m and 1.1m and the circular plate 4 together to form a "closing plate" to close the top of the steel casing 1111 with an inner diameter of 1.1m; when performing construction auxiliary operations on steel casings 1111 with inner diameters of 1.2m and 1.3m, as described above, the corresponding multiple extrusion rings 3 and circular plates 4 are connected together to form a "closing plate"; and when performing construction auxiliary operations on a steel casing 1111 with an inner diameter exceeding 1.3m, an extrusion ring 3 of corresponding size can be directly added to the installation rod 1 to cooperate with the circular plate 4 to form a "closing plate" to close the top of the steel casing 1111; and when performing construction auxiliary operations on a steel casing 1111 with an inner diameter exceeding 1.3m, in addition to adding an extrusion ring 3 of corresponding size to the installation rod 1, an extrusion ring 3 for compacting the soil is also added.

[0031] It should be noted that when multiple extrusion rings 3 and circular plates 4 are connected together to form a "closed plate" to perform auxiliary construction operations on the steel casing 1111, the auxiliary personnel move the limit rod 203 toward the circular plate 4 so that the extrusion rings 3 placed on the steel casing 1111 are not connected to the circular plate 4, and multiple extrusion rings 3 and circular plates 4 that are smaller than the inner diameter of the steel casing 1111 are connected together to compact the soil inside the steel casing 1111.

[0032] According to the above steps, we know that the present invention has the following effects: When backfilling the steel casing 1111, the present invention is placed above the steel casing 1111 in advance, and the "closing plate" composed of the extrusion ring 3 and the circular plate 4 closes the opening on the steel casing 1111 to prevent soil from falling into the steel casing 1111. This avoids part of the soil in the bucket falling into the steel casing 1111 when the excavator backfills the soil, increasing the soil content inside the steel casing 1111 and causing engineering deviations in the subsequent placement of cast-in-place piles in the steel casing 1111. At the same time, multiple extrusion rings 3 and circular plates 4 can be combined to form a "closing plate" that matches the diameter of the steel casing 1111, so as to close steel casings 1111 with different diameters, which is highly practical.

[0033] At the same time, it is different from simply closing the steel casing 1111 by covering. In the present invention, the extrusion ring 3 and the circular plate 4 are combined to form a "closing plate" that matches the diameter of the steel casing 1111, and the remaining extrusion rings 3 independent of the outside of the steel casing 1111 together form a "compacting plate" for compacting the soil outside the steel casing 1111. That is, while closing the opening on the steel casing 1111, it can also achieve the compaction operation of the soil outside the steel casing 1111, and different from using a bucket for compaction, the inner side of the "compacting plate" contacts the outer side of the steel casing 1111, which can ensure the soil compaction effect and avoid the bucket being restricted by the shape of the steel casing 1111 and difficult to fit the outer periphery of the steel casing 1111, resulting in the problem that some backfill soil cannot be compacted. At the same time, the "compacting plate" is used to compact the soil to avoid the bucket approaching the steel cylinder for compaction work, which easily collides with the steel casing 1111 and causes it to tilt.

[0034] At the same time, in addition to achieving the purpose of closing the opening on the steel casing 1111 and compacting the soil outside the steel casing 1111, the present invention's "closing plate" for closing the opening on the steel casing 1111 can also be used to compact the soil inside the steel casing 1111, without the need to replace the internal compacting equipment, thereby improving construction efficiency and saving engineering costs. At the same time, multiple extrusion rings 3 and circular plates 4 can be combined together to form a "closing plate" that matches the inner diameter of the steel casing 1111 to compact the soil inside steel casings 1111 with different inner diameters.

[0035] 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 downward and contacts the outer side of the steel casing 1111, so that the present invention forms a limit with the steel casing 1111 through the extrusion ring 3, preventing the present invention from shifting during the compaction process, thereby ensuring that the compaction work proceeds smoothly.

[0036] The additional technical effects of the present invention are as follows: like Figure 1 As shown, the insertion end of the locking pin 102 and both ends of the limiting rod 203 are configured as frustum, so as to facilitate the insertion and removal of the locking pin 102 and the limiting rod 203 .

[0037] like Figure 1 As shown, a counterweight block 402 is provided on the circular plate 4 to increase the weight of the circular plate 4 and enhance the compacting effect of the circular plate 4 on the soil in the steel casing 1111 . Example 2

[0038] On the basis of Example 1, Figure 1 and Figure 4 As shown, each pull rope 5 passes through the corresponding mounting rod 1 .

[0039] The free end of each pull rope 5 passing through the installation rod 1 is fixedly connected to a limit pin to prevent the free end of the pull rope 5 from being separated from the installation rod 1.

[0040] The present invention also has the following effects: When the circular plate 4 compacts the soil in the steel casing 1111, the excavator boom lifts the circular plate 4 through the pull rope 5. Each pull rope 5 passes through the mounting rod 1, thereby limiting the relative position of the circular plate 4 and the mounting rod 1. The relative position of each extrusion ring 3 and the mounting rod 1 is fixed, avoiding the circular plate 4 from moving up and down in the steel casing 1111 and causing large displacement, which makes it impossible to align with the extrusion ring 3 with the smallest inner diameter, and finally making it impossible for the circular plate 4 to be reset. Example 3

[0041] On the basis of Example 1 and Example 2, Figure 1 and Figure 4 As shown, the upper surface of the circular plate 4 is arranged to be concave.

[0042] The present invention also has the following effects: When the outer edge of the circular plate 4 is close to the inner wall of the steel casing 1111, the gap between the two is small, and when the circular plate 4 moves up and down, it is inevitable that it will shake, and 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. Then, the upper surface of the circular plate 4 is set to a concave shape, so that the backfill soil initially falling on the upper surface of the circular plate 4 gathers toward the middle of the circular plate 4, avoiding falling out from the edge of the circular plate 4, and avoiding the backfill soil on the circular plate 4 falling into the gap and getting stuck in the gap, affecting the movement of the circular plate 4.

[0043] Although the present disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-described embodiments, but should be determined not only by the appended claims but also by the equivalents of the appended claims.

Claims

1. An auxiliary construction structure for installing a cast-in-place pile steel casing, comprising a plurality of installation rods (1); all the installation rods (1) are connected together; a fixing rope (101) is fixed to each installation rod (1); and the structure is characterized in that: It also includes a connecting rod (2), an extrusion ring (3), a circular plate (4) and a pull rope (5); each installation rod (1) is plugged with at least four connecting rods (2); each connecting rod (2) is provided with at least two coaxial locking holes (201); each installation rod (1) is plugged with at least four locking pins (102); each locking pin (102) is plugged with the locking hole (201) of the corresponding connecting rod (2); all the installation rods (1) are distributed in a ring shape; the connecting rods (2) at the same position on all the installation rods (1) are connected to a common extrusion ring (3), and all the extrusion rings (3) are in contact with each other; The diameters of the extrusion rings (3) increase outwards in sequence, and the inner diameter of the outermost extrusion ring (3) is the largest; a limiting hole (202) is provided on each connecting rod (2); all the connecting rods (2) on the same mounting rod (1) are connected to a limiting rod (203) through the limiting hole (202); all the 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 extrusion ring (3); a plurality of connecting blocks (401) are fixed to the circular plate (4); the connecting blocks (401) are connected to adjacent limiting rods (203); and a plurality of pull ropes (5) are fixed to the circular plate (4).

2. The auxiliary construction structure for installing a bored pile steel casing according to claim 1, characterized in that: It also includes a connecting ring (103); all the mounting rods (1) are commonly connected to the connecting ring (103).

3. The auxiliary construction structure for installing a bored pile steel casing according to claim 1, characterized in that: A ball head is provided on the locking pin (102).

4. The auxiliary construction structure for installing a bored pile steel casing according to claim 1, characterized in that: The insertion end of the locking pin (102) and both ends of the limiting rod (203) are truncated cone-shaped.

5. The auxiliary construction structure for installing a bored pile steel casing according to claim 1, characterized in that: A counterweight (402) is provided on the circular plate (4).

6. The auxiliary construction structure for installing a bored pile steel casing according to claim 5, characterized in that: The counterweight (402) is slidably connected to the connecting ring (103).

7. The auxiliary construction structure for installing a bored pile steel casing according to claim 1, characterized in that: The free end of the fixing rope (101) is provided with a hook.

8. The auxiliary construction structure for installing a bored pile steel casing according to claim 1, characterized in that: Each pull rope (5) passes through the corresponding mounting rod (1).

9. The auxiliary construction structure for installing a bored pile steel casing according to claim 8, characterized in that: The free end of each pull rope (5) passing through the mounting rod (1) is fixedly connected to a limiting pin.

10. The auxiliary construction structure for installing a bored pile steel casing according to claim 5, characterized in that: The upper surface of the circular plate (4) is arranged in a concave shape.

Images