Auxiliary pile pressing device for pile end of static pressure pile

Abstract

The utility model provides an auxiliary pile pressing device for a static pressure pile end. The auxiliary pile pressing device comprises a pile body of an anchor rod static pressure pile and a pile tip with the upper end fixedly connected with a sleeve. The pile tip is located below the pile body and is in sliding connection with the pile body, and a vibration pressurizing device is arranged on the pile tip; the vibration pressurizing device comprises a vibrator placed on the upper surface of a pile tip, a linear hydraulic driving mechanism is fixedly arranged at the upper end of the vibrator, and the fixed end of the linear hydraulic driving mechanism is detachably connected with the inner wall of a pile body of the anchor rod static pressure pile. According to the utility model, the pressure of the linear hydraulic driving mechanism is applied to the vibrator and is downwards applied to the pile tip, so that the pressure of the pile tip part in the anchor rod static pressure pile is increased. According to the vibration pressurizing device, a better effect can be achieved by adopting smaller pressure, and large-amplitude displacement of a soil layer is avoided. And the provided pressure can be adjusted according to needs so as to adapt to different soil layers.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building engineering, and specifically relates to a static pressure pile end auxiliary pile pressing device. BACKGROUND

[0002] The existing building foundation is settled due to design, construction, geological disasters and improper use of maintenance, etc., which can cause building cracking, tilting, affect normal use and threaten the personal and property safety of the owner. If the industrial building foundation is settled, it may cause the equipment to be unable to operate normally, even stop production and cause significant economic losses. Foundation reinforcement measures must be taken to eliminate safety hazards. Anchor rod static pressure pile is a commonly used building foundation reinforcement technology, which has the advantages of simple construction, good reinforcement effect, small noise and less disturbance to the building, and is widely used in reinforcement of existing building soft foundation and collapsible foundation. The existing anchor rod static pressure pile foundation reinforcement technology uses static pressure pile method to press the anchor rod static pressure pile into the building foundation. Although it is simple to operate and easy to implement, it will increase the difficulty of pile pressing when encountering hard soil layer during pile pressing. The verticality of the anchor rod static pressure pile is difficult to control, and even pile breaking occurs, which makes it necessary to terminate pile pressing, so that the length of the anchor rod static pressure pile cannot reach the designed pile length, the building foundation reinforcement cannot meet the design requirements, and safety hazards are hidden, which may cause settlement again and require secondary reinforcement.

[0003] Patent CN1116675A discloses a hydraulic post-vibration pile pressing device, which comprises a hollow pile rod, a hydraulic vibrator is arranged in the pile rod, and the vibrator is connected with the pile tip at the lower end. The pile tip at the bottom is embedded with the pile rod. The pile tip vibrates, which liquefies the surrounding sand body, and the pile rod descends under the thrust of the pile machine. However, in the above structure, when encountering relatively hard soil layer, only the vibrator itself vibrates, the efficiency is low, the soil layer cannot be vibrated or it takes a long time to push the soil layer. If the pressure of the whole pile rod is increased, the soil layer may be displaced greatly. Patent CN218373788U discloses a self-vibration steel pipe static pressure pile, a counterweight is arranged above the vibration assembly of the pile rod, and the vibration assembly is extruded by the gravity of the counterweight, so that only the pressure of the pile end part is increased, so that the steel pipe pile penetrates the sand soil layer with small pressure. However, this method needs a large counterweight block, which may not have enough space in the pile tip. Moreover, the size and weight of the counterweight block are not easy to adjust. SUMMARY

[0004] The utility model provides a static pressure pile end auxiliary pile pressing device.

[0005] The utility model discloses a static pressure pile auxiliary pile pressing device of pile end, including the pile body of anchor rod static pressure pile, the pile tip of upper end fixed connection sleeve, the pile tip is located below the pile body and with the pile body sliding connection, set up vibration pressurizing device on the pile tip, vibration pressurizing device includes the vibrator of placing on the upper surface of pile tip, the linear hydraulic drive mechanism of fixed setting on the vibrator upper end, the fixed end of linear hydraulic drive mechanism with the inner wall of the pile body of anchor rod static pressure pile is detachable connection.

[0006] The connecting mechanism of the linear hydraulic drive mechanism and the anchor rod static pressure pile includes a rotating upper limiting mechanism and a lower limiting mechanism for preventing the linear hydraulic drive mechanism from moving downward, wherein the rotating upper limiting mechanism drives the linear hydraulic drive mechanism to rotate, so as to switch between a position for preventing upward movement and an upper pulling position for upward movement; a traction rope C leading to the outside is arranged on the linear hydraulic drive mechanism.

[0007] The linear hydraulic drive mechanism is a top pressure jack; the rotating upper limiting mechanism includes at least two clamping blocks arranged along the circumference of the inner wall of the pile body, a back plate is fixedly arranged on the top pressure jack, and at least two clamping teeth are arranged along the circumference of the back plate; the lower limiting mechanism includes a limiting ring arranged below the clamping blocks on the inner wall of the pile body; the back plate is placed on the upper surface of the limiting ring; a stopper is hingedly arranged between the top pressure jack and the pile body, and the stopper is a linear drive mechanism; the stopper is extended and retracted to drive the top pressure jack to rotate; when the clamping teeth are rotated directly below the clamping blocks, the position is a stop position; when the clamping teeth are rotated outside the clamping blocks, the position is an upper pulling position.

[0008] The clamping blocks are evenly distributed along the circumference of the inner wall of the pile body; the back plate is evenly provided with clamping teeth along the circumference; a lifting ring is fixedly arranged at the upper end of the top pressure jack, one end of the stopper is hingedly arranged in the lifting ring, and the other end is hingedly arranged on the clamping block; the lifting ring is fixedly connected to the upper end of the traction rope C leading to the outside of the anchor rod static pressure pile.

[0009] The vibration pressurizing device further includes a camera arranged above the top pressure jack; the lifting ring is fixedly connected to the upper end of a comprehensive cable leading to the outside of the anchor rod static pressure pile; the traction rope C is arranged in the comprehensive cable; the comprehensive cable further includes an oil pipe A of a constant pressure jack, an oil pipe B of a stopper, an oil pipe D of a vibrator, and a camera signal line E.

[0010] The sleeve is located outside the pile body and is in sliding connection with the pile body; a waterproof structure is arranged between the sleeve and the pile body.

[0011] Compared with the prior art, the pressure of the linear hydraulic driving mechanism is applied to the vibrator and downwardly to the pile tip, and the pressure of the pile tip part in the anchor rod static pressure pile is increased. The vibration and pressing device of the utility model can transfer force to the pile tip with higher efficiency, can achieve better effect with smaller pressure, and can avoid large displacement of the soil layer. Moreover, the provided pressure can be adjusted according to needs, so as to adapt to different soil layers. The occupied volume is smaller, and the vibration and pressing device can be applied to anchor rod static pressure piles of different specifications. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the overall structure schematic diagram of the utility model.

[0013] Figure 2 is Figure 1 the top pressing jack in the is located in the top view of the stop position.

[0014] Figure 3 is Figure 2 the top pressing jack rotates to the upper pulling position in the schematic diagram.

[0015] Figure 4 is the vibration and pressing device and the pile tip schematic diagram.

[0016] Figure 5 is Figure 4 the working state diagram of the top pressing jack after pressing H height in the.

[0017] Figure 6 is the anchor rod static pressure pile schematic diagram after the vibration and pressing device is taken out after the pile pressing is completed.

[0018] Wherein, the base raft 1, the pile hole 2, the anchor rod static pressure pile 3, the pull rod 4, the pressure bearing beam 5, the counterforce frame 6, the pile pressing jack 7, the pile tip 8, the vibration and pressing device 9, the sleeve pipe 10, the vibrator 11, the top pressing jack 12, the back plate 13, the clamping block 14, the limiting ring 15, the stopper 16, the lifting ring 17, the camera 18, the comprehensive cable 19. DETAILED DESCRIPTION

[0019] In the utility model, unless another definite provision and limitation, the technical terms used in the application should be the general meaning understood by the technical personnel described in the utility model. The terms "connect", "connect", "fix", "set" and the like should be understood broadly, can be fixed connection, also can be detachable connection, or be integrated; can be direct connection, also can be indirect connection through intermediate medium; can be mechanical connection, also can be electrical connection. Unless another definite provision and limitation, the first feature is "on" or "under" the second feature can be the direct contact of the first and second features, or indirect contact through intermediate medium. Moreover, the first feature is "on" or "on" or "on" the second feature can be the first feature is directly above or obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature. The first feature is "under" or "under" or "under" the second feature can be the first feature is directly below or obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature. The relationship terms such as first, second and the like are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. The orientation or positional relationship indicated by the terms such as "center", "transverse", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise" and the like used in the description is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation.

[0020] The technical scheme of the utility model will be described clearly and completely in combination with the drawings and specific embodiments. As Figures 1-6As shown, an auxiliary pile pressing device for a static pressure pile includes a pile body of an anchor rod static pressure pile 3, and a pile tip 8 fixedly connected with a sleeve 10 at the upper end; the pile tip 8 is located below the pile body and is in sliding connection with the pile body. A vibration pressing device 9 is arranged on the pile tip 8; the vibration pressing device 9 includes a vibrator 11 placed on the upper surface of the pile tip 8, a linear hydraulic driving mechanism is fixedly arranged at the upper end of the vibrator 11, and the fixed end of the linear hydraulic driving mechanism is detachably connected with the inner wall of the pile body of the anchor rod static pressure pile 3. The sleeve 10 and the pile tip 8 are connected together by welding. The linear hydraulic driving mechanism preferably comprises a jack. The detachable connection can be achieved in various ways and by various mechanisms, and during operation, the fixed end of the linear hydraulic driving mechanism can be prevented from moving up and down, thereby facilitating stable pressure application at the lower end; after the operation is completed, the linear hydraulic driving mechanism can be taken out of the hollow pile body. The linear hydraulic driving mechanism providing downward pressure is arranged above the vibrator 11. The linear hydraulic driving mechanism applies pressure on the vibrator 11 and downwardly on the pile tip 8, thereby increasing the pressure of the pile tip 8 part in the anchor rod static pressure pile 3. Compared with increasing the pressure of the entire anchor rod static pressure pile 3 from the top, the vibration pressing device 9 of the utility model has higher efficiency in transferring force to the pile tip 8, can achieve better effect by using smaller pressure, and can avoid large displacement of the soil layer. Moreover, the pressure provided by the linear hydraulic driving mechanism can be adjusted as required, thereby adapting to different soil layers and having wider application scenarios than the separate counterweight block. Moreover, the linear hydraulic driving mechanism such as the jack occupies smaller volume and can be applied to anchor rod static pressure piles 3 of different specifications.

[0021] The connecting mechanism of the linear hydraulic driving mechanism and the anchor rod static pressure pile 3 includes a rotating upper limiting mechanism and a lower limiting mechanism for preventing the linear hydraulic driving mechanism from moving downward; the rotating upper limiting mechanism drives the linear hydraulic driving mechanism to rotate, thereby switching between the retreat-preventing position for upward movement and the upper pulling position for upward movement.

[0022] The straight line hydraulic drive mechanism is a top pressure jack 12; the rotating upper limiting mechanism comprises at least two clamping blocks 14 arranged along the circumference on the inner wall of the pile body, a back plate 13 fixedly arranged on the top pressure jack 12, and at least two clamping teeth arranged along the circumference on the back plate 13; the lower limiting mechanism comprises a limiting ring 15 arranged on the inner wall of the pile body below the clamping blocks 14; the back plate 13 is placed on the upper surface of the limiting ring 15; the top pressure jack 12 and the pile body are hingedly arranged with a retainer 16, and the retainer 16 is a straight line drive mechanism; the retainer 16 drives the top pressure jack 12 to rotate in an extending and retracting mode; when the clamping teeth rotate to be directly below the clamping blocks 14, the clamping teeth are located at a retainer position; when the clamping teeth rotate to be outside the clamping blocks 14, the clamping teeth are located at a pulling position. Here, the retainer 16 is preferably a hydraulic cylinder, and the remaining structures that can realize extension and retraction can also be applied in the utility model. Other common structures that can drive the top pressure jack 12 to rotate can also be adopted.

[0023] The clamping blocks 14 are uniformly distributed along the circumference on the inner wall of the pile body; the back plate 13 is uniformly arranged with clamping teeth along the circumference; the top pressure jack 12 is fixedly arranged with a lifting ring 17 at the upper end, one end of the retainer 16 is hingedly connected to the lifting ring 17, and the other end is hingedly connected to the clamping blocks 14; the lifting ring 17 is fixedly connected to the upper end of the traction rope C leading to the outside of the anchor rod static pressure pile 3. In the embodiment of the drawings, the back plate 13 is fixedly arranged at the upper end of the constant pressure jack. The lifting ring 17 is arranged at the upper end of the back plate 13. Two sides of the lifting ring 17 are respectively hingedly connected with one retainer 16, and the other ends of the two retainers 16 are respectively hingedly connected to the two symmetrically arranged clamping blocks 14 on the corresponding sides.

[0024] The vibration pressing device 9 further comprises a camera 18 arranged above the top pressure jack 12; the lifting ring 17 is fixedly connected to the upper end of the comprehensive cable 19 leading to the outside of the anchor rod static pressure pile 3; the traction rope C is arranged in the comprehensive cable 19; the comprehensive cable 19 further comprises an oil pipe A of the constant pressure jack, an oil pipe B of the retainer 16, an oil pipe D of the vibrator 11, and a signal line E of the camera 18. The camera 18 can be fixedly arranged on the lifting ring 17 or a suitable position on the comprehensive cable 19. The comprehensive cable 19 is used to start the vibrator 11 and the top pressure jack 12, and to pull out the vibrator 11 and the top pressure jack 12 from the anchor rod static pressure pile 3 after the pile pressing is completed. The camera is used to observe the working state of the vibration pressing device 9.

[0025] The sleeve 10 is located outside the pile body and is in sliding connection with the pile body; a waterproof structure is arranged between the sleeve 10 and the pile body. The waterproof structure here can be a waterproof pad, a sealing strip or the like structure to prevent water from entering the inside of the pile body. Preferably, the sleeve 10 is sleeved outside the anchor rod static pressure pile 3; however, the sleeve 10 can also be arranged inside the pile body, in which case the pile tip 8 needs to be larger in diameter than the sleeve 10 to ensure that the lower end of the pile body can press against the upper end of the pile tip 8 to push the pile tip 8 to move. The shape of the pile tip 8 is not limited to the shape in the drawings and can be the existing shape and structure.

[0026] In order to ensure the smoothness of the pile pressing process, the basic situation of the building structure, the type of foundation and the buried depth of the building structure should be mastered before the pile pressing, the geological survey report of the building site is consulted, the causes of the building foundation settlement are judged, the depth and distribution of the soft soil layer and the vertical hard soil layer of the foundation are found out, the depth and range of the soil layer with large pile pressing difficulty of the anchor rod static pressure pile are mastered, and the pile pressing scheme is determined. The specific implementation steps are as follows:

[0027] (1) A pile hole 2 is opened in the building foundation raft 1, an anchor rod static pressure pile 3 is placed in the pile hole 2, a pull rod 4 and a pressure bearing beam 5 form a counterforce frame 6, the counterforce frame 6 provides a counterforce for a pile pressing jack 7, wherein the pile pressing jack 7 pressurizes the anchor rod static pressure pile 3, so as to press it into the foundation according to the design requirement, and to achieve the purpose of reinforcing the foundation.

[0028] (2) The vibration pressing device 9 is installed on the bottom pile tip 8 inside the anchor rod static pressure pile 3, which is composed of a sleeve 10, a vibrator 11, a top pressing jack 12, a back plate 13, a clamping block 14, a limiting ring 15, a retainer 16, a lifting ring 17, a camera 18 and a comprehensive cable 19.

[0029] (3) When installing the anchor rod static pressure pile, the sleeve 10 is welded with the pile tip 8 as a whole, the vibrator 11 and the top pressing jack 12 are placed on the pile tip 8, and the clamping block 14 and the limiting ring 15 are respectively welded on the inner wall of the anchor rod static pressure pile 3. The lifting ring 17 is welded on the top surface of the back plate 13, and the lower end of the comprehensive cable 19 is connected with the lifting ring 17 firmly.

[0030] (4) Before the first section of the anchor rod static pressure pile 3 is pressed, the vibration pressing device 9 is assembled as a whole and installed inside the first section of the anchor rod static pressure pile 3, and is pressed into the building foundation with the anchor rod static pressure pile 3. The vibration pressing device 9 should have waterproof measures in order to be applied to the soil layer with underground water.

[0031] (5) When hard soil layer is encountered, the anchor rod static pressure pile 3 no longer advances under the maximum pressure of the pile pressing jack 7, the vibrator 11 and the pressing jack 12 can be started under the condition that the pressure of the pile pressing jack 7 is maintained, and the sleeve 10 of the vibration and pressing device 9 outside the anchor rod static pressure pile 3 is pressed downward under the combined action of the vibration of the vibrator 11 and the pressure of the pressing jack 12.

[0032] (6) When the pressing jack 12 presses downward for one stroke H, the pressing jack 12 returns oil, and the pile pressing jack 7 advances for one stroke H.

[0033] (7) The stopper 16 is started to rotate the back plate 13 to avoid the clamping block 14, the comprehensive cable 19 is pulled from the top to drive the vibrator 11, the pressing jack 12 and the back plate 13 to rise until the anchor rod static pressure pile 3 is pulled out.

[0034] The anchor rod static pressure pile is safe, reliable, high in operability, high in efficiency and low in cost, and when hard soil layer is encountered in the pile pressing process of the anchor rod static pressure pile, the vibration and pressing auxiliary device built in the anchor rod static pressure pile is started to enable the anchor rod static pressure pile to penetrate the hard soil layer, to ensure the design pile length, to increase the single pile bearing capacity and to achieve the purpose of building foundation reinforcement, to provide a new method for existing building foundation reinforcement, inclination correction and deviation correction, to expand the application range of the anchor rod static pressure pile technology, to effectively eliminate the safety hidden danger, to prolong the building service life, to be a kind of urban renewal technology and to have remarkable economic benefit and social benefit.

[0035] The technical features of the above-described embodiments can be combined in any manner, as long as the combination of the technical features does not contradict, and should be considered as within the scope of the present application. Without departing from the overall concept of the present application, the technical solution of the present application can be replaced or changed, and several changes and improvements can also be considered as within the protection scope of the present application.

Claims

1. A static pressure pile end auxiliary pile pressing device, comprising a pile body of an anchor rod static pressure pile, a pile tip fixedly connected with a sleeve pipe; the pile tip is located below the pile body and is in sliding connection with the pile body, characterized in that: The pile tip is provided with a vibration pressing device; the vibration pressing device comprises a vibrator placed on the upper surface of the pile tip, a linear hydraulic driving mechanism fixedly arranged on the upper end of the vibrator, and a fixed end of the linear hydraulic driving mechanism is detachably connected with the inner wall of the pile body of the anchor static pressure pile.

2. The static pressure pile end auxiliary pile pressing device according to claim 1, characterized in that: The connecting mechanism of the linear hydraulic driving mechanism and the anchor static pressure pile comprises a rotating upper limiting mechanism and a lower limiting mechanism for preventing the downward movement of the linear hydraulic driving mechanism; the rotating upper limiting mechanism drives the linear hydraulic driving mechanism to rotate, so as to switch between the retreat-preventing position and the upward-pullable position; the linear hydraulic driving mechanism is provided with a traction rope C leading to the outside.

3. The auxiliary jacking device for static pressure pile according to claim 2, characterized in that: The linear hydraulic driving mechanism is a top pressing jack; the rotating upper limiting mechanism comprises at least two clamping blocks arranged along the circumference of the inner wall of the pile body, a back plate fixedly arranged on the top pressing jack, and at least two clamping teeth arranged along the circumference of the back plate; the lower limiting mechanism comprises a limiting ring arranged below the clamping blocks on the inner wall of the pile body; the back plate is placed on the upper surface of the limiting ring; a retreat stopper is hingedly arranged between the top pressing jack and the pile body, and the retreat stopper is a linear driving mechanism; the retreat stopper drives the top pressing jack to rotate; when the clamping teeth are rotated to be directly below the clamping blocks, the position is the retreat-preventing position; when the clamping teeth are rotated to be outside the clamping blocks, the position is the upward-pullable position.

4. The auxiliary jacking device for static pressure pile according to claim 3, characterized in that: The clamping blocks are uniformly distributed along the circumference of the inner wall of the pile body; the back plate is uniformly provided with clamping teeth along the circumference; the top pressing jack is fixedly provided with a lifting ring at the upper end, one end of the retreat stopper is hingedly arranged in the lifting ring, and the other end is hingedly arranged on the clamping block; the lifting ring is fixedly connected with the upper end of the traction rope C leading to the outside of the anchor static pressure pile.

5. The static pressure pile end auxiliary pile pressing device according to claim 4, characterized in that: The vibration pressing device further comprises a camera arranged above the top pressing jack; the lifting ring is fixedly connected with the upper end of a comprehensive cable leading to the outside of the anchor static pressure pile; the traction rope C is arranged in the comprehensive cable; the comprehensive cable further comprises an oil pipe A of the constant-pressure jack, an oil pipe B of the retreat stopper, an oil pipe D of the vibrator, and a camera signal line E.

6. The auxiliary pile pressing device for the end of the static pressure pile according to any one of claims 1-5, characterized in that: The sleeve is located outside the pile body and is in sliding connection with the pile body; a waterproof structure is arranged between the sleeve and the pile body.

Images