Prefabricated pile pressing platform

Abstract

The utility model provides a prefabricated pile pressing platform which comprises a steel concrete base body, a plurality of pile sinking holes are formed in the steel concrete base body at intervals in the length direction of the steel concrete base body, connecting ribs are embedded in the steel concrete base body, and the connecting ribs upwards stretch out of the upper surface of the steel concrete base body. The connecting rib is used for being detachably installed on a steel concrete base body through a static pile driver; uplift holes corresponding to the pile sinking holes are formed in the steel concrete base body, the uplift holes inwards penetrate through the inner walls of the corresponding pile sinking holes, and the uplift holes outwards penetrate through the outer wall of the steel concrete base body; the steel pile can sink underground through the pile sinking hole, the anti-pulling bolt can be connected to the bolt hole in the steel pile through the anti-pulling hole, and the steel pile is connected to the prefabricated pile pressing platform. According to the utility model, the sunk steel pile is used as a counter-force mechanism, and the static pile driver is used for sinking the steel pile, so that the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a prefabricated pile-pressing platform. Background Art

[0002] In order to reduce construction costs, steel piles are widely used in the support system of foundation pits. As support piles, after the construction of underground structures is completed, the steel piles need to be pulled out of the ground for recycling. When sinking steel piles into the ground, vibration, hammering, static pressure and other methods can be used for sinking. Since static pressure sinking has the advantages of low noise and flexible movement, it can be applied to densely populated areas and narrow construction areas and has been widely promoted. However, when using static pressure sinking, a reaction force mechanism needs to be set on the ground to obtain the pressure required for sinking steel piles. The existing reaction force mechanism generally uses a counterweight or an anchor rod is set underground. When using the counterweight method, the counterweight needs to be moved frequently, resulting in low construction efficiency and an increase in construction costs. When using anchor rods, multiple hair roots need to be set for each steel pile, and concrete needs to be laid in the corresponding construction area to harden the ground for the installation of a static pile driver, which leads to an increase in construction costs. Utility Model Content

[0003] In order to make full use of the advantages of low noise and flexible movement of the static pile driver and reduce the need for anchor rods or counterweights, the utility model proposes a prefabricated pile driving platform, which includes a steel concrete base, a plurality of pile sinking holes are arranged on the steel concrete base at intervals along the length direction of the steel concrete base, and connecting bars are pre-embedded in the steel concrete base, the connecting bars extend upward from the upper surface of the steel concrete base, and the connecting bars are used to be detachably installed on the steel concrete base through the static pile driver;

[0004] In the steel concrete matrix, an anti-pull-out hole is provided corresponding to each pile hole, and the anti-pull-out hole penetrates the inner wall of the corresponding pile hole inwardly, and penetrates the outer wall of the steel concrete matrix outwardly; the steel pile can be sunk into the ground through the pile hole, and the anti-pull-out bolt can be connected to the bolt hole on the steel pile through the anti-pull-out hole to connect the steel pile to the prefabricated pile driving platform.

[0005] When using the prefabricated pile driving platform in the utility model to sink steel piles, it is necessary to first use the existing technology to sink 1-2 steel piles into the ground through the pile driving holes, and then connect the pull-out bolts to the steel piles through the bolt holes to connect the steel piles to the prefabricated pile driving platform, and then detachably install the static pile driving machine on the prefabricated pile driving platform through the connecting ribs, and use the 1-2 steel piles that have been completely sunk to provide a reaction force to continue sinking the steel piles through the prefabricated pile driving platform. When all the pile driving holes on the prefabricated pile driving platform are inserted with steel piles, the prefabricated pile driving platform is moved in the direction of continuing to sink the steel piles, and 1-2 pile driving holes are inserted again on the steel piles that have been completely sunk, and then the steel piles are connected to the prefabricated pile driving platform with pull-out bolts, and the prefabricated pile driving platform is used to continue to drive the piles.

[0006] In addition, two prefabricated pile driving platforms are detachably connected together to form a joint platform. The first prefabricated pile driving platform is used to sink steel piles. When all the pile sinking holes of the first prefabricated pile driving platform are used, the second prefabricated pile driving platform can use the sunken steel piles on the first prefabricated pile driving platform to provide reaction force. When the steel piles on the second prefabricated pile driving platform can meet its own reaction force needs, the first prefabricated pile driving platform is removed from the second prefabricated pile driving platform and reconnected to the other end of the second prefabricated pile driving platform. This process is repeated to complete the sinking of all steel piles.

[0007] With the utility model, only at the beginning of construction, it is necessary to sink the steel piles using the existing method. When the sunken steel piles can pass through sufficient reaction force, the flexible and lightweight static pile driver can be used to sink the steel piles, thereby improving the work efficiency and making use of the advantages of the static pile driver. Under normal conditions, only 1-2 steel piles are needed to provide sufficient reaction force for the subsequent sinking of steel piles.

[0008] Furthermore, in order to improve the strength of the prefabricated pile-pressing platform, an inner reinforcement plate is provided on the inner circumference of the anti-pulling hole. An outer reinforcement plate is provided on the outer circumference of the steel concrete matrix. The use of the inner reinforcement plate and the outer reinforcement plate can also improve the impact resistance of the prefabricated pile-pressing platform, avoiding damage caused by unintentional external collisions, which affects its service life.

[0009] Furthermore, in order to improve the bending strength of the prefabricated pile-pressing platform, a steel pad is laid on the upper surface and / or the lower surface of the steel concrete matrix. The steel pad can effectively improve the bending modulus of the prefabricated pile-pressing platform.

[0010] Furthermore, in order to reduce the weight of the prefabricated pile driving platform for easy transportation, a weight reduction hole is provided between two adjacent pile driving holes.

[0011] Furthermore, a connecting portion is respectively provided at both ends of the steel concrete matrix in the length direction, and the connecting portion includes a plurality of threaded holes extending in the vertical direction; when two prefabricated pile driving platforms are arranged together in the length direction, the two ends of a plane steel plate can be respectively overlapped on the opposite ends of the two prefabricated pile driving platforms, and the connecting bolts pass through the plane steel plate and are screwed into the threaded holes, so that the two prefabricated pile driving platforms are connected together through the plane steel plate.

[0012] When the number of steel piles to be sunk is large, if only one prefabricated pile driving platform is set, then after the sinking of the same number of steel piles as the pile sinking holes on the prefabricated pile driving platform, it is necessary to sink the starting one or two steel piles again using a static pile driver, a hammer pile driver or a vibrating pile driver with a counterweight, or connect one or two pile sinking holes at the end of the prefabricated pile driving platform to the sunken steel piles, resulting in a decrease in the efficiency of steel pile sinking. After the connection part is set, the two prefabricated pile driving platforms can be formed into a joint platform, and the two prefabricated The pile driving platforms are detachably connected together. When the steel piles in the pile driving holes on the first prefabricated pile driving platform are all sunk, the second prefabricated pile driving platform can directly use the steel piles on the first prefabricated pile driving platform as reaction force to sink the steel piles. When the second prefabricated pile driving platform can use the steel piles it has sunk as reaction force, the first prefabricated pile driving platform can be disassembled and connected to the other end of the second prefabricated pile driving platform. This process is repeated, and the two prefabricated pile driving platforms provide reaction force for each other to efficiently complete the sinking of all steel piles.

[0013] Furthermore, in order to prevent the flat steel plate or connecting bolts from protruding upward from the upper surface of the precast pile driving platform, which would have an adverse effect on the installation or movement of the static pile driver, a receiving groove is provided on the upper side of both ends of the steel concrete base in the length direction. The receiving groove is formed by a downward depression of the upper surface of the steel concrete base, and the threaded hole penetrates upward through the bottom surface of the receiving groove. The two ends of the flat steel plate are respectively received in the receiving grooves of two adjacent precast pile driving platforms, and the upper surface of the flat steel plate does not exceed the upper surface of the precast pile driving platform, and the connecting bolts do not exceed the upper surface of the flat steel plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0015] Figure 2 yes Figure 1 Center AA view.

[0016] Figure 3 yes Figure 1 View from the center BB direction.

[0017] Figure 4 yes Figure 1 View from the CC direction.

[0018] Figure 5 yes Figure 1 View from the center DD direction.

[0019] Figure 6 There are two Figure 1 Schematic diagram of prefabricated pile-pressed platforms connected together.

[0020] Figure 7 for Figure 6 Enlarged view of part E.

[0021] Figure 8 Is adopted Figure 1 The flow chart of the prefabricated pile driving platform when sinking steel piles is shown.

[0022] Fig. 9 It is a structural schematic diagram of another embodiment of the utility model. DETAILED DESCRIPTION

[0023] See also Figure 1-Figure 5 ,exist Figure 1 In the figure, the direction of the first arrow X indicates the length direction of the steel concrete base described below. The structure of the prefabricated pile driving platform is described in detail below. The prefabricated pile driving platform includes a steel concrete base 11, and the steel concrete base 11 includes a concrete body 112 and a steel cage 111 cast in the concrete body. Five pile sinking holes are arranged at intervals on the steel concrete base 11 along the length direction of the steel concrete base 11. For the convenience of description, the five pile sinking holes are respectively referred to as the first pile sinking hole 161, the second pile sinking hole 162, the third pile sinking hole 163, the fourth pile sinking hole 164 and the fifth pile sinking hole 165. In this embodiment, the pile sinking hole is used to sink the H steel pile, so the cross section of the pile sinking hole is set to be rectangular.

[0024] A connecting bar 15 is embedded in the steel concrete base 11 and extends upward from the upper surface of the steel concrete base. The connecting bar 15 is used to be detachably mounted on the steel concrete base via a static pile driver. In this embodiment, the connecting bar is specifically made of fine-rolled threaded steel bars. When the static pile driver is installed, the fine-rolled threaded steel bars can pass through the bolt holes on the bottom plate of the static pile driver, and nuts can be screwed on the fine-rolled threaded steel bars, so that the static pile driver can be detachably mounted on the prefabricated pile driving platform.

[0025] In the reinforced concrete matrix 11, eight anti-pullout holes 14 are arranged corresponding to each pile hole. Each anti-pullout hole 14 penetrates the inner wall of the corresponding pile hole inwardly and penetrates the outer wall of the reinforced concrete matrix outwardly. The eight anti-pullout holes are divided into two anti-pullout hole groups. The two anti-pullout hole groups are respectively located on both sides of the corresponding pile hole along the width direction of the reinforced concrete matrix. Figure 1 In the figure, the direction of the second arrow Y indicates the width direction of the reinforced concrete matrix.

[0026] In this embodiment, in order to improve the strength of the prefabricated pile-pressing platform, an inner reinforcing plate 13 is provided on the inner circumference of the anti-pulling hole, and an outer reinforcing plate 12 is provided on the outer circumference of the steel concrete base. The outer reinforcing plate surrounds the four sides of the steel concrete base, and the inner reinforcing plate 13 and the outer reinforcing plate 12 are welded to the steel cage. It can be understood that according to different strength requirements for the prefabricated pile-pressing platform, the inner reinforcing plate 13 or the outer reinforcing plate 12 can be eliminated, or both of the inner reinforcing plate 13 and the outer reinforcing plate 12 can be eliminated.

[0027] In this embodiment, in order to improve the bending strength of the prefabricated pile driving platform, an upper steel pad 18 is laid on the upper surface of the steel concrete base, and a lower steel pad 19 is laid on the lower surface of the steel concrete base.

[0028] In order to reduce the weight of the prefabricated pile driving platform for easy transportation, a weight reduction hole 17 is provided between two adjacent pile driving holes. It can be understood that the weight reduction hole is not necessary. When the distance between two adjacent pile driving holes is small, the weight reduction hole is not required. The weight reduction hole can be set according to specific needs.

[0029] In order to facilitate continuous operation, when large-scale underground sinking of steel piles is carried out, at least two prefabricated pile driving platforms are required so as to be connected into a larger pile driving platform. For this reason, in the present embodiment, a connecting portion is respectively provided at both ends of the length direction of the steel concrete matrix, and each connecting portion has six threaded holes 32 arranged in a matrix. Each threaded hole 32 extends in the vertical direction and passes through the upper surface of the prefabricated pile driving platform. When the two prefabricated pile driving platforms are arranged together in the length direction, a flat steel plate 41 can detachably connect the two prefabricated pile driving platforms into one through the threaded holes.

[0030] See also Figure 6 and Figure 7 For ease of description, the two prefabricated pile driving platforms arranged together along the length direction are respectively referred to as the first platform 100 and the second platform 200. The two ends of the plane steel plate 41 are respectively overlapped on the upper surfaces of the two prefabricated pile driving platforms after crossing the gap between the first platform 100 and the second platform 200. The connecting bolts 42 pass downward through the plane steel plate and are screwed into the threaded holes to connect the two prefabricated pile driving platforms together.

[0031] In order to ensure the connection strength, an internal threaded pipe is pre-buried in the steel concrete matrix corresponding to each threaded hole, and the inner cavity of the internal threaded pipe is formed as an internal threaded hole.

[0032] In order to keep the upper surface of the prefabricated pile driving platform flat, a receiving groove 31 is respectively provided on the upper side of the two ends of the steel concrete base in the length direction. The receiving groove 31 is formed by the upper surface of the steel concrete base being recessed downward, and the threaded hole penetrates upward through the bottom surface of the receiving groove. The two ends of the plane steel plate are respectively accommodated in the receiving grooves of two adjacent prefabricated pile driving platforms, and the upper surface of the plane steel plate does not exceed the upper surface of the prefabricated pile driving platform upward. Specifically in the present embodiment, the upper surface of the plane steel plate is coplanar with the upper surface of the prefabricated pile driving platform, and the connecting bolts are countersunk bolts, and corresponding countersunk holes are provided on the plane steel plate so that the connecting bolts do not exceed the upper surface of the plane steel plate upward.

[0033] The following is an explanation of the method of using the prefabricated pile driving platform in this embodiment. Figure 8 , the method of use specifically includes the following steps:

[0034] (1) Please refer to Figure 8 In step (a), the first platform 100 is arranged in the construction area, and then the first H-steel pile 211 is sunk into the ground through the first pile hole 161. Since there is not enough reaction force when sinking the first H-steel pile 211, a static pile driver, a hammer pile driver or a vibrating pile driver with a counterweight is required to sink the first H-steel pile 211 into the ground.

[0035] (2) Please refer to Figure 8 In step (b), the anti-pullout bolt 22 is connected to the flange of the first H steel pile 211 through the anti-pullout hole 14 and fixed with a nut, so that the first H steel pile 211 is connected to the first platform 100, and then the second H steel pile 212 is sunk into the ground through the second pile hole 162.

[0036] When the first H steel pile can guarantee the reaction force required for sinking the second H steel pile, a static pile driver without counterweight can be used to sink the second H steel pile. If the reaction force required for sinking the second H steel pile cannot be guaranteed by relying solely on the first H steel pile, the method of sinking the first H steel pile is used to complete the sinking of the second H steel pile.

[0037] (3) Please refer to Figure 8 In step (c), the anti-pullout bolt 22 is connected to the flange of the second H steel pile 212 through the anti-pullout hole 14, and fixed with a nut, so that the second H steel pile 212 is connected to the first platform 100. The static pile driver is installed above the third pile hole 163 through the connecting rib 15, and the third H steel pile 213 is sunk into the ground through the third pile hole. When sinking the third H steel pile, the first H steel pile and the second H steel pile can already meet the reaction force required for the sinking of the third H steel pile. Therefore, starting from the third H steel pile, the static pile driver does not need additional counterweights, and only relies on the reaction force provided by the H steel pile to complete the subsequent sinking of the H steel pile.

[0038] (4) Please refer to Figure 8 In step (d) and step (e), the fourth H steel pile 214 and the fifth H steel pile 215 are sunk in the manner of step (3). At this time, all the pile holes on the first platform 100 have been sunk with H steel piles.

[0039] (5) Move the first platform 100 in the direction of continuing to sink the H-steel piles by the distance of three H-steel piles, so that the two pile holes at one end of the first platform are respectively inserted into one H-steel pile. For example, the first pile hole and the second pile hole can be respectively inserted into the fourth H-steel pile and the fifth H-steel pile. Then, use anti-pullout bolts to connect the fourth H-steel pile and the fifth H-steel pile to the first platform, and continue to lower the H-steel piles.

[0040] When the above step (5) is used to continue sinking the steel pile, the operation is inconvenient because the first platform needs to be reinserted into the H-steel pile that has been completely sunk. In order to improve the operation efficiency, the following step (6) can be used to replace step (5). The specific steps of step (6) are as follows:

[0041] (6) Please refer to Figure 6 , arrange the second platform 200 on the side of the first platform adjacent to the fifth pile hole, and arrange the first platform 100 and the second platform 200 together along the length direction, and then use connecting bolts 42 to connect the flat steel plate to the adjacent ends of the first platform 100 and the second platform 200, so that the first platform 100 and the second platform 200 are connected together to form a combined platform.

[0042] The H steel piles corresponding to the first platform 100 are used to provide reaction force, and the method of step (3) is used to sequentially sink the H steel piles into the ground through the pile holes on the second platform 200. After the two H steel piles are sunk through the second platform 200, the flat steel plate can be removed from the second platform 200, and then the first platform is transferred to the other end of the second platform and connected to the second platform through the flat steel plate. In this way, all the H steel piles can be sunk through the two prefabricated pile driving platforms. Figure 6 In the figure, only one H-steel pile is exemplarily shown on the second platform 200 . The H-steel pile is marked as 216 and is sunk into the ground through a pile hole of the second platform 200 adjacent to the first platform 100 .

[0043] It can be understood that in order to speed up the pile sinking speed, multiple joint platforms can be set up to construct multiple H-steel piles at the same time.

[0044] According to the above, the pile hole in this embodiment is used to sink H steel piles, so the cross section of the pile hole is set to be rectangular. It can be understood that the pile hole can also be set to other shapes according to the type of steel pile to be sunk. Fig. 9 , Fig. 9 The prefabricated pile driving platform shown is used for sinking steel pipe piles, so the pile driving holes are set to be circular, and the weight-reducing holes between adjacent pile driving holes are eliminated.

Claims

1. A prefabricated pile driving platform, characterized in that: It comprises a steel concrete base, a plurality of pile sinking holes are arranged at intervals on the steel concrete base along the length direction of the steel concrete base, and connecting bars are embedded in the steel concrete base, the connecting bars extend upward from the upper surface of the steel concrete base, and the connecting bars are used to be detachably installed on the steel concrete base through a static pile driver; In the steel concrete matrix, an anti-pull-out hole is provided corresponding to each pile hole, and the anti-pull-out hole penetrates the inner wall of the corresponding pile hole inwardly, and penetrates the outer wall of the steel concrete matrix outwardly; the steel pile can be sunk into the ground through the pile hole, and the anti-pull-out bolt can be connected to the bolt hole on the steel pile through the anti-pull-out hole to connect the steel pile to the prefabricated pile driving platform.

2. The prefabricated pile driving platform according to claim 1, characterized in that: An inner reinforcement plate is arranged on the inner circumferential surface of the anti-pullout hole.

3. The prefabricated pile driving platform according to claim 1, characterized in that: An outer reinforcement plate is arranged on the outer peripheral surface of the reinforced concrete matrix.

4. The prefabricated pile driving platform according to claim 1, characterized in that: A steel backing plate is laid on the upper surface and / or the lower surface of the reinforced concrete base.

5. The prefabricated pile driving platform according to claim 1, characterized in that: A weight-reducing hole is arranged between two adjacent pile-sinking holes.

6. The prefabricated pile driving platform according to claim 1, characterized in that: A connecting part is respectively provided at both ends of the steel concrete matrix in the length direction, and the connecting part includes a plurality of threaded holes extending in the vertical direction; when two prefabricated pile driving platforms are arranged together in the length direction, the two ends of a plane steel plate can be respectively overlapped on the opposite ends of the two prefabricated pile driving platforms, and the connecting bolts pass through the plane steel plate and are screwed into the threaded holes, so that the two prefabricated pile driving platforms are connected together through the plane steel plate.

7. The prefabricated pile driving platform according to claim 6, characterized in that: A receiving groove is respectively provided on the upper side of both ends of the steel concrete base in the length direction, and the receiving groove is formed by the upper surface of the steel concrete base being recessed downward, and the threaded hole penetrates upward through the bottom surface of the receiving groove, and the two ends of the plane steel plate are respectively received in the receiving grooves of two adjacent prefabricated pile driving platforms, and the upper surface of the plane steel plate does not exceed the upper surface of the prefabricated pile driving platform upward, and the connecting bolts do not exceed the upper surface of the plane steel plate upward.

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