A construction equipment and method for a compaction pile

Abstract

The application discloses a compaction pile construction equipment and a compaction pile construction method, and relates to the technical field of foundation treatment. The compaction pile construction equipment comprises a mobile chassis used for walking along the ground, a drill mast, a power head used for installing a down-the-hole hammer, a vibrator used for clamping a casing, and a loading mechanism. The power head and the vibrator are movably installed on the drill mast from top to bottom. The axis of the power head is collinear with the axis of the vibrator. The power head and the vibrator are connected with the loading mechanism respectively. The loading mechanism is used for driving the power head and the vibrator to move upwards along the axis direction of the pile hole. The root canal pilot hole method is used to form the pile hole through the hard sandwich layer. The down-the-hole hammer and the casing are used to compact and vibrationally compact the pile body of the filler layer. The pile forming quality is higher. The construction time is short. The construction efficiency is high. The construction cost is low.

Description

Technical Field

[0001] This invention relates to the field of foundation treatment technology, and more specifically, to a compaction pile construction device. Furthermore, this invention also provides a compaction pile construction method using the aforementioned compaction pile construction device. Background Technology

[0002] When constructing on diverse strata such as subsidence, soft soil, and backfill, the compaction method is usually adopted, taking into account factors such as the bearing capacity of the pile foundation, construction efficiency, and economic benefits.

[0003] The compaction pile construction method involves creating holes through vibration, impact, or other methods, then filling the holes with filler material and compacting it in layers to form a dense pile body, so that the dense pile body and the original foundation can share the load. Currently, the compaction pile construction method still has the following disadvantages:

[0004] First, effective piles cannot be formed when facing dense sand layers, rock layers, or other hard interlayers. Second, when the pile depth is relatively deep, methods such as vibration and impact for forming holes cannot reach the effective depth.

[0005] To address the aforementioned issues, the current construction method for compaction piles typically employs a pre-drilling method. This involves first using equipment to squeeze the soil into a hole. If blockage occurs and construction cannot continue, the pre-drilling equipment is replaced to drill a new hole. After the pre-drilling is completed, backfill material is added. Finally, the equipment is replaced to compact the backfill material with impact and tamping, forming a compacted pile.

[0006] Of course, there is also a construction method that involves first drilling pilot holes, then filling them with material, and finally replacing the equipment to compact the material with impact compaction. However, regardless of which construction method is used, at least two pieces of equipment are required to operate. The equipment cost is high, and replacing equipment requires moving the machines and aligning the holes, which seriously affects the overall construction efficiency.

[0007] In conclusion, how to reduce the construction cost and improve the construction efficiency of compaction piles is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0008] In view of this, the purpose of the present invention is to provide a compaction pile construction device that uses a root tube to guide the hole to form a pile hole through a hard interlayer, and uses a down-the-hole hammer and casing to compact and vibrate the filler layer to compact the pile body, resulting in higher pile quality, shorter construction time, higher construction efficiency, and lower construction cost.

[0009] In addition, the present invention also provides a method for constructing compacted piles using the aforementioned compacted pile construction equipment.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] A compaction pile construction device includes a mobile chassis for traveling along the ground. The mobile chassis is equipped with a drill mast, a power head for mounting a down-the-hole hammer, a vibrator for clamping a casing, and a loading mechanism. The power head and the vibrator are movably mounted on the drill mast from top to bottom. The axis of the power head is collinear with the axis of the vibrator. The power head and the vibrator are respectively connected to the loading mechanism, which drives the power head and the vibrator to move upward along the axis of the pile hole.

[0012] Preferably, the bottom end of the drill mast is hinged to the movable chassis, and an adjustable-length diagonal brace is provided between the drill mast and the movable chassis. One end of the diagonal brace is hinged to the movable chassis, and the other end of the diagonal brace is hinged to the middle of the drill mast. When the length of the diagonal brace changes, the drill mast swings back and forth relative to the movable chassis.

[0013] Preferably, the drill mast is provided with a linear guide rail, the power head is slidably connected to the linear guide rail via a first slider, and the vibrator is slidably connected to the linear guide rail via a second slider.

[0014] Preferably, the drill mast includes at least two slidably connected telescopic sections, and a locking assembly for fixing the relative position of the two telescopic sections is provided between two adjacent telescopic sections;

[0015] The telescopic section is provided with a slide groove arranged along the extension direction of the drill mast, the power head is provided with a first pulley slidably installed in the slide groove, and the vibrator is provided with a second pulley slidably installed in the slide groove;

[0016] The power head is connected to the first pulley via a first spring, which presses the first pulley into the groove. The vibrator is connected to the second pulley via a second spring, which presses the second pulley into the groove.

[0017] Preferably, the loading mechanism includes a first winch device and a second winch device. A first wire rope is sleeved on the drum of the first winch device. The first wire rope is connected to the top loading point of the power head. The first wire rope is used to apply an upward pulling force to the power head.

[0018] A second wire rope is fitted onto the drum of the second winch device. The second wire rope is connected to the top loading point of the vibrator and is used to apply an upward tension to the vibrator.

[0019] Preferably, the first winch device and the second winch device are both located on the upper surface of the mobile chassis. The mobile chassis is provided with a first guide pulley at the end relatively close to the drill mast, and a second guide pulley is provided at the top of the drill mast. The first wire rope and the second wire rope are wound around the first guide pulley and the second guide pulley.

[0020] Preferably, it also includes a third winch and a fourth winch, wherein a third wire rope is sleeved on the drum of the third winch, the first wire rope is connected to the bottom loading point of the power head, and the third wire rope is used to apply a downward pulling force to the power head.

[0021] A fourth steel wire rope is fitted onto the drum of the fourth winch device. The fourth steel wire rope is connected to the bottom loading point of the vibrator and is used to apply a downward pulling force to the vibrator.

[0022] Preferably, it also includes a metering hopper for holding the backfill material, the metering hopper being connected to the inlet of the sleeve via a feeding pipe.

[0023] A method for constructing compaction piles, using the compaction pile construction equipment described in any one of the above claims, comprising:

[0024] Step S1: Connect the power head, down-the-hole hammer, vibrator, and casing, so that the down-the-hole hammer is fitted inside the casing, and a pile hole is formed by root canal drilling.

[0025] Step S2: Fill the pile hole with filler material through a metering bucket;

[0026] Step S3: Move the power head and the vibrator so that the bottom of the down-the-hole hammer and the bottom of the casing are both moved to the top of the packing layer;

[0027] Step S4: The vibrator drives the sleeve to perform in-situ vibration on the filler layer;

[0028] In step S5, the power head drives the down-the-hole hammer to apply pressure to the filler layer to compact the filler layer. At the same time, the vibrator drives the casing to vibrate the filler layer to compact it. If the height of the filler layer is less than the same as the pile depth, then return to step S2.

[0029] Preferably, the amount of filler material q in a single pass gradually increases from bottom to top along the axial direction of the pile hole.

[0030] The compaction pile construction equipment provided by this invention uses a down-the-hole hammer fitted inside a casing during impact drilling. The hammer passes through a hard interlayer via a root canal to form a pile hole. During the compaction of the fill material, the casing is used to vibrate the fill material layer evenly. The down-the-hole hammer and casing are used to compact and vibrate the fill material layer to form a dense pile. This results in higher pile quality and avoids frequent machine relocation and hole-fixing operations caused by equipment replacement. The construction time is short, the construction efficiency is high, and it helps to reduce equipment costs.

[0031] In addition, the present invention also provides a method for constructing compacted piles using the aforementioned compacted pile construction equipment. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0033] Figure 1 A schematic diagram of a specific embodiment of the compaction pile construction equipment provided by the present invention;

[0034] Figure 2 This is a schematic diagram of the working process of compaction pile construction equipment.

[0035] Figures 1-2 middle:

[0036] 01-Pile hole; 1-Mobile chassis; 2-Drill mast; 3-Power head; 4-Down-the-hole hammer; 5-Vibrator; 6-Casing; 7-Winding device; 8-Diagonal brace; 9-Measuring bucket. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0038] The core of this invention is to provide a compaction pile construction device that uses a root canal to form a pile hole through a hard interlayer, and uses a down-the-hole hammer and casing to compact and vibrate the filler layer to compact the pile body. This results in higher pile quality, shorter construction time, higher construction efficiency, and lower construction cost.

[0039] In addition, the present invention also provides a method for constructing compacted piles using the aforementioned compacted pile construction equipment.

[0040] The compaction pile construction equipment provided by the present invention includes a mobile chassis 1 for traveling along the ground. The mobile chassis 1 is equipped with a drilling mast 2, a power head 3 for installing a down-the-hole hammer 4, a vibrator 5 for clamping a casing 6, and a loading mechanism. The power head 3 and the vibrator 5 are movably installed on the drilling mast 2 from top to bottom. The axis of the power head 3 is collinear with the axis of the vibrator 5. The power head 3 and the vibrator 5 are respectively connected to the loading mechanism. The loading mechanism is used to drive the power head 3 and the vibrator 5 to move upward along the axis of the pile hole 01.

[0041] Among them, the mobile chassis 1 is the main support structure and traveling mechanism of the construction equipment. It can be specifically set as a walking chassis, a tracked chassis, or a wheeled chassis. Considering factors such as terrain adaptability, the mobile chassis 1 is usually set as a walking chassis. The movement distance is controllable, and there is no need to frequently adjust the overall position of the equipment. It has low site requirements, can travel on soft soil foundations, and does not require the laying of special tracks, making construction preparation simple.

[0042] The drilling mast 2 is installed on the upper surface of the mobile chassis 1. Considering the mass of the power head 3 and the vibrator 5, in order to avoid problems such as bending and deformation of the drilling mast 2 after long-term operation, a diagonal brace 8 is usually provided between the mobile chassis 1 and the drilling mast 2 to support the drilling mast 2. The diagonal brace 8 can form a three-point support with the mobile chassis 1 and the drilling mast 2, thereby improving the overall structural stability of the equipment.

[0043] The power head 3 and the down-the-hole hammer 4 are detachably connected. Specifically, they can be connected by flange connection, threaded connection, key connection, etc. The power head 3 is used to drive the down-the-hole hammer 4 to apply downward pressure to the packing layer and compact the packing layer, or to make the down-the-hole hammer 4 vibrate to compact the packing layer according to the actual production needs.

[0044] The specific type, structure, power, and connection method between the down-the-hole hammer 4 and the power head 3 are determined according to actual production needs, such as the thickness of the dense packing layer in a single working cycle, and will not be elaborated here.

[0045] The vibrator 5 is used to clamp and fix the sleeve 6, and transmit vibration energy to the surrounding medium through the sleeve 6. For example, when the vibration is stationary, the positions of the vibrator 5 and the sleeve 6 remain unchanged. The local weak areas of the packing layer are compacted by continuous vibration. When vibration compaction is carried out, the vibration and movement of the sleeve 6 are synchronized, which can extend the vibration energy to a larger range of media and achieve overall vibration compaction.

[0046] The specific type, structure, power, and connection method between the sleeve 6 and the vibrator 5 are determined according to actual production needs, such as the type of packing layer and the thickness of the dense packing layer in a single working cycle, and will not be elaborated here.

[0047] Both the power head 3 and the vibrator 5 are connected to the loading mechanism. The loading mechanism is used to apply an upward pulling force to the power head 3 and the vibrator 5, causing the power head 3 and the vibrator 5 to move upward along the axis of the pile hole 01. It can be understood that since the movement of the vibrator 5 of the power head 3 is not synchronized, the loading mechanism loads the power head 3 and the vibrator 5 respectively. The movement of the power head 3 and the vibrator 5 is independent of each other and does not interfere with each other.

[0048] When the tension of the loading mechanism on the power head 3 and vibrator 5 is less than its own weight, the resultant force of the tension and gravity is downward, causing the power head 3 and vibrator 5 to move downward relative to the drill mast 2 along the axis of the pile hole 01.

[0049] Of course, the loading mechanism can also be configured to provide a downward force to the power head 3 and the vibrator 5. Taking the power head 3 as an example, when the loading mechanism applies an upward force to the power head 3, the power head 3 drives the down-the-hole hammer 4 to rise. Conversely, when the loading mechanism applies a downward force to the power head 3, the power head 3 drives the down-the-hole hammer 4 to move downward.

[0050] The loading mechanism can be set as follows: Figure 1 The winch device 7 shown can also be configured as a linear power mechanism such as a hydraulic cylinder, a pneumatic cylinder, or a linear push rod.

[0051] The power head 3 and the vibrator 5 are movably mounted on the drill mast 2. They can move up and down relative to the drill mast 2 by the stretching and retraction of the wire rope, or they can be slidably connected to the drill mast 2 by a guide mechanism. The guide mechanism can be specifically set as a linear guide mechanism, a ball screw mechanism, etc.

[0052] For example, please refer to the figure. The drill mast 2 is equipped with a linear guide rail. The power head 3 is slidably connected to the linear guide rail through the first slider. The vibrator 5 is slidably connected to the linear guide rail through the second slider. The movement direction of the vibrator 5 of the power head 3 can be restricted by the sliding cooperation of the first slider, the second slider and the linear guide rail, so as to avoid the movement direction of the two from deviating from the axis of the pile hole 01, thereby ensuring the verticality of the pile hole 01.

[0053] When constructing compaction piles, please refer to the following: Figure 2First, the mobile chassis 1 is controlled to move the equipment to the pile location to be constructed, completing the relocation and hole alignment operations. Then, according to the construction requirements of the compaction pile, a suitable down-the-hole hammer 4 and casing 6 are determined to be compatible with the pile diameter. The power head 3 and down-the-hole hammer 4, vibrator 5 and casing 6 are connected. The loading mechanism is controlled to move the power head 3 and vibrator 5 downward along the axis of the pile hole 01. The down-the-hole hammer 4 is fitted inside the casing 6. The pile hole 01 is formed by drilling and pre-drilling the strata through the root canal method. The root canal method can effectively penetrate hard interlayers. Then, filler is added into the pile hole 01. If the position of the down-the-hole hammer 4 affects the filling, the loading mechanism is controlled. The mechanism moves the power head 3 along the axis of the pile hole 01 to prevent the down-the-hole hammer 4 from interfering with the filling material. After filling is completed, the loading mechanism is controlled to move the power head 3 and vibrator 5 along the axis of the pile hole 01 until the down-the-hole hammer 4 and the casing 6 move above the filling material layer. The vibrator 5 is controlled to perform in-situ vibration to ensure uniform distribution of the filling material layer. The power head 3 is controlled to apply downward pressure, and the down-the-hole hammer 4 applies pressure to the filling material layer to compact the filling material. At the same time, the vibrator 5 is controlled to drive the casing 6 to vibrate and compact the filling material to form a dense pile body. The work cycle of filling-in-situ vibration-compaction and vibration compaction continues until the filling material layer is higher than or equal to the pile depth.

[0054] In this embodiment, during impact drilling, the down-the-hole hammer 4 is fitted inside the casing 6. The pile hole 01 is formed by passing through the hard interlayer via the root canal. During the compaction of the fill material, the in-situ vibration of the casing 6 is used to uniformly compact the fill material layer. The down-the-hole hammer 4 and the casing 6 compact and vibrate the fill material layer to form a dense pile body, resulting in higher pile quality. At the same time, it avoids frequent machine relocation and hole operation caused by equipment replacement, resulting in shorter construction time, higher construction efficiency, and reduced equipment costs.

[0055] Considering that the flatness of the bottom surface of the mobile chassis 1 will affect the direction of the drill mast 2 and thus the drilling direction, the bottom end of the drill mast 2 can be hinged to the mobile chassis 1. An adjustable diagonal brace 8 is provided between the drill mast 2 and the mobile chassis 1. One end of the diagonal brace 8 is hinged to the mobile chassis 1, and the other end of the diagonal brace 8 is hinged to the middle of the drill mast 2. When the length of the diagonal brace 8 changes, the drill mast 2 swings back and forth relative to the mobile chassis 1.

[0056] The length of the diagonal brace 8 is adjustable. The adjustment can be manual or manual. For example, the diagonal brace 8 includes at least two sliding sleeves. The length of the diagonal brace 8 can be adjusted by changing the installation position of the connecting pin used to connect the two adjacent sliding sleeves.

[0057] The above adjustment can also be automatic. For example, the diagonal brace 8 can be set as a linear power mechanism such as a hydraulic cylinder, pneumatic cylinder or electric push rod. The length of the diagonal brace 8 can be adjusted by the extension and retraction of the piston rod or push rod. At the same time, the linear power mechanism usually has a self-locking capability, so there is no need to set up an additional locking component to fix the length of the diagonal brace 8.

[0058] Assuming the diagonal brace 8 is at its shortest length, the drill mast 2 is set perpendicular to the upper surface of the movable chassis 1. When the length of the diagonal brace 8 increases, the drill mast 2 swings back and forth relative to the movable chassis 1 around the hinge point of the drill mast 2 and the movable chassis 1, thereby adjusting the verticality of the drill mast 2 relative to the ground.

[0059] In this embodiment, the diagonal brace 8 is used to swing the drill mast 2 relative to the moving chassis 1 and adjust the verticality of the drill mast 2 relative to the ground, thereby ensuring that the drilling direction of the power head 3 and the vibrator 5 is perpendicular to the pile foundation surface where the pile is located, which is beneficial to ensuring the pile formation quality of the squeeze pile.

[0060] The length of the casing 6 is determined according to the pile depth of the squeeze pile. In the initial state, the top of the casing 6 is clamped and fixed in the vibrator 5, and the bottom of the casing 6 is a certain distance from the pile foundation surface, so as to reserve enough installation space for the disassembly and assembly of the vibrator 5 and the casing 6. Therefore, the length of the casing 6 required for squeeze piles with different pile depths is different, which in turn leads to different ranges of the required height of the drill mast 2.

[0061] Based on the above embodiments, in order to meet the pile-forming requirements of extrusion piles with different pile-forming depths, the drill mast 2 can be provided to include at least two slidingly connected telescopic sections, and a locking component for fixing the relative position of the two adjacent telescopic sections can be provided between them. The locking component can be specifically set as a connecting pin, fastening screw, etc.

[0062] By adjusting the length of the overlapping area between two adjacent telescopic sections and adjusting the overall length of the drill mast 2, the height of the drill mast 2 can be adjusted according to the pile depth of the extrusion pile, thereby meeting the installation requirements of the vibrator 5 on the casing 6.

[0063] When the mast 2 adopts a sliding telescopic structure, there will be a height difference in the guide mechanism of each telescopic section of the mast 2. In order to allow the power head 3 and the vibrator 5 to pass smoothly through the connection of the telescopic section, the telescopic section can be provided with a slide groove along the extension direction of the mast 2. The power head 3 is provided with a first pulley that is slidably installed in the slide groove, and the vibrator 5 is provided with a second pulley that is slidably installed in the slide groove.

[0064] The power head 3 is connected to the first pulley via a first spring, which is used to press the first pulley into the groove. The vibrator 5 is connected to the second pulley via a second spring, which is used to press the second pulley into the groove.

[0065] Compared to ordinary sliders, rollers can pass through grooves with height differences more easily, and the pre-compressed spring can press the rollers tightly into the grooves, ensuring that the rollers always keep in contact with the grooves and preventing the rollers from coming out of the grooves.

[0066] Of course, each telescopic section of the drill mast 2 can also be equipped with a detachable linear guide rail. After the length of the drill mast 2 is adjusted, each telescopic section and the linear guide rail are connected. At this time, the outer surface of the linear guide rail is in the same plane.

[0067] Based on the above embodiments, the specific structure of the loading mechanism is defined. The loading mechanism includes a first winch device and a second winch device. A first wire rope is sleeved on the drum of the first winch device. The first wire rope is connected to the top loading point of the power head 3. The first wire rope is used to apply an upward pulling force to the power head 3.

[0068] A second wire rope is fitted onto the drum of the second winch device. The second wire rope is connected to the top loading point of the vibrator 5 and is used to apply an upward tension to the vibrator 5.

[0069] The first winch is used for positive loading of the power head 3, and the second winch is used for positive loading of the vibrator 5. Both the first and second winches can be located on the top of the drill mast 2 or directly on the upper surface of the mobile chassis 1. The first and second winches are usually fixed to the upper surface of the mobile chassis 1 by bolt connection, resulting in a lower overall center of gravity and stronger installation stability and reliability.

[0070] To reduce the number of parts and improve their interchangeability, the type and model of the first winch device are usually the same as those of the second winch device. The specific type and model of the two are determined according to the maximum load mass in actual production, so as to ensure that the winch device 7 can smoothly lift the power head 3 and the vibrator 5.

[0071] To avoid interference between the first and second wire ropes, a certain safe distance should be maintained between the first and second winches. The aforementioned safe distance is determined based on actual production needs.

[0072] In this embodiment, the winch device 7 loads the power head 3 and the vibrator 5 with a wire rope. Compared with hydraulic cylinders and air cylinders, the winch device 7 is more suitable for continuous and stable loading of long stroke and large load, and has a simple structure, convenient assembly and low cost.

[0073] Meanwhile, the power head 3 and the vibrator 5 have different loads and their movements are not synchronized during compaction pile construction. By using two winches 7 to load the power head 3 and the vibrator 5 respectively, it can be ensured that the power head 3 and the vibrator 5 work independently and do not interfere with each other.

[0074] The top of the drill mast 2 is quite high above the mobile chassis 1. If the winch device 7 is placed on the top of the drill mast 2, it will easily cause the center of gravity of the drill mast 2 to be unstable, affecting the overall stability of the equipment. On the other hand, the top structure of the drill mast 2 needs to be adjusted so that the drill mast 2 can effectively support the winch device 7.

[0075] Preferably, the first winch device and the second winch device can both be set on the upper surface of the mobile chassis 1. The mobile chassis 1 is provided with a first guide pulley at the end relatively close to the drill mast 2, and a second guide pulley is provided at the top of the drill mast 2. The first wire rope and the second wire rope are wrapped around the first guide pulley and the second guide pulley. The first guide pulley and the second guide pulley are used to change the direction of the tension of the wire rope, thereby lowering the overall center of gravity of the equipment and improving the stability of the equipment.

[0076] The number of the first guide pulley and the second guide pulley can be the same as the number of wire ropes, so that the first wire rope and the second wire rope are respectively wound around different first guide pulleys and second guide pulleys, thus avoiding interference between the first wire rope and the second wire rope;

[0077] Alternatively, both the first and second guide pulleys can be equipped with two separate wire grooves, with the first and second wire ropes wound in different wire grooves, in order to simplify the structure of the loading mechanism and make it more convenient.

[0078] Of course, the first and second winches can also be replaced with a double-drum winch, with the first and second wire ropes respectively mounted on two drums driven by different motors.

[0079] Based on the above embodiments, in order to achieve negative loading on the power head 3 and the vibrator 5, a third winch device and a fourth winch device are also included. A third wire rope is sleeved on the drum of the third winch device. The first wire rope is connected to the bottom loading point of the power head 3. The third wire rope is used to apply a downward pulling force to the power head 3.

[0080] A fourth wire rope is fitted on the drum of the fourth winch device. The fourth wire rope is connected to the bottom loading point of the vibrator 5 and is used to apply a downward pulling force to the vibrator 5.

[0081] For details regarding the specific types, models, and connection methods of the third and fourth winches, please refer to the first and second winches mentioned earlier.

[0082] In this embodiment, the winch device 7 applies a negative load to the power head 3 and the vibrator 5. Compared to the power head 3 and the vibrator 5 moving downwards due to their own weight, the moving speed of the power head 3 and the vibrator 5 can be better controlled, avoiding the impact on the hole formation quality of the root canal due to their excessive downward movement speed.

[0083] Based on the above embodiments, a metering hopper 9 for holding the backfill material is also included. The metering hopper 9 is connected to the inlet of the sleeve 6 through a feeding pipe so that the backfill material can be quickly filled through the feeding pipe.

[0084] The metering hopper 9 can be a standard unit volume component, so that the volume of the metering hopper 9 is V=q / n, where q is the unit filling amount in a single working cycle during compaction pile construction, and n is a positive integer, so that operators can quickly estimate the amount of backfill material based on the number of metering hoppers 9.

[0085] Alternatively, a groove can be provided inside the metering hopper 9 to mark the volume of the internal backfill material, so as to help operators quickly read the volume of the backfill material inside the metering hopper 9 and accurately calculate the amount of backfill material.

[0086] The two ends of the feeding pipe are connected to the outlet of the metering hopper 9 and the inlet of the sleeve 6, respectively. The connection structure at the two locations can be set as threaded connection, flange connection, or quick-release coupling.

[0087] In addition to the aforementioned compaction pile construction equipment, the present invention also provides a compaction pile construction method including the compaction pile construction equipment disclosed in the above embodiments, comprising:

[0088] Step S1: Connect the power head 3, down-the-hole hammer 4, vibrator 5, and casing 6, so that the down-the-hole hammer 4 is fitted inside the casing 6, and the pile hole 01 is formed by the root canal drilling method.

[0089] Step S2: Fill the pile hole 01 with filler material through metering bucket 9;

[0090] Step S3: Move the power head 3 and vibrator 5 so that the bottom of the down-the-hole hammer 4 and the bottom of the casing 6 are both moved to the top of the packing layer.

[0091] Step S4: Vibrator 5 drives sleeve 6 to perform in-situ vibration on the packing layer;

[0092] In step S5, the power head 3 drives the down-the-hole hammer 4 to apply pressure to the filling layer to compact it. At the same time, the vibrator 5 drives the casing 6 to vibrate the filling layer to compact it. If the height of the filling layer is less than the same as the pile depth, then return to step S2.

[0093] It should be noted that in step S2, in order to prevent problems such as grout overflow, it is necessary to accurately calculate and control the amount of backfill material Q and the unit amount of backfill material q in a single working cycle to meet certain requirements. , Where k is the compaction filling coefficient, D is the pile diameter of the squeeze pile, and H is the pile depth of the squeeze pile. The difference in pile depth after compaction in two consecutive working cycles.

[0094] Considering that the bottom of the squeeze pile bears more load, preferably, the pile hole 01 can be set from bottom to top along the axial direction, and the amount of filling material q of the pile hole 01 at one time can be gradually increased, so as to enhance the compactness and bearing capacity of the filling layer at the bottom of the squeeze pile.

[0095] It should be noted that the first and second sliders, the first pulley and the second pulley, the first winch, the second winch, the third winch and the fourth winch, and the first wire rope, the second wire rope, the third wire rope and the fourth wire rope mentioned in this application are only used to distinguish different positions and do not contain any limitation on the order.

[0096] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0097] The compaction pile construction equipment and method provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A compaction pile construction device, characterized in that, The system includes a mobile chassis (1) for traveling along the ground. The mobile chassis (1) is equipped with a drill mast (2), a power head (3) for mounting a down-the-hole hammer (4), a vibrator (5) for clamping a casing (6), and a loading mechanism. The power head (3) and the vibrator (5) are movably mounted on the drill mast (2) from top to bottom. The axis of the power head (3) is collinear with the axis of the vibrator (5). The power head (3) and the vibrator (5) are respectively connected to the loading mechanism. The loading mechanism is used to drive the power head (3) and the vibrator (5) to move upward along the axis of the pile hole (01). The loading mechanism includes a first winch, a second winch, a third winch and a fourth winch. The first winch is used to apply positive loading to the power head (3), the second winch is used to apply positive loading to the vibrator (5), the third winch is used to apply negative loading to the power head (3), and the fourth winch is used to apply negative loading to the vibrator (5). In use, the power head (3) and the vibrator (5) are moved so that the bottom of the down-the-hole hammer (4) and the bottom of the sleeve (6) are both moved to the top of the packing layer. The vibrator (5) drives the sleeve (6) to perform in-situ vibration on the packing layer. The power head (3) drives the down-the-hole hammer (4) to apply pressure to the packing layer to compact the packing layer. At the same time, the vibrator (5) drives the sleeve (6) to vibrate the packing layer to compact the packing layer.

2. The compaction pile construction equipment according to claim 1, characterized in that, The bottom end of the drill mast (2) is hinged to the movable chassis (1). An adjustable-length diagonal brace (8) is provided between the drill mast (2) and the movable chassis (1). One end of the diagonal brace (8) is hinged to the movable chassis (1), and the other end of the diagonal brace (8) is hinged to the middle of the drill mast (2). When the length of the diagonal brace (8) changes, the drill mast (2) swings back and forth relative to the movable chassis (1).

3. The compaction pile construction equipment according to claim 1, characterized in that, The drill mast (2) is provided with a linear guide rail, the power head (3) is slidably connected to the linear guide rail through a first slider, and the vibrator (5) is slidably connected to the linear guide rail through a second slider.

4. The compaction pile construction equipment according to claim 1, characterized in that, The drill mast (2) includes at least two slidingly connected telescopic sections, and a locking assembly for fixing the relative position of the two adjacent telescopic sections is provided between them. The telescopic section is provided with a slide groove arranged along the extension direction of the drill mast (2), the power head (3) is provided with a first pulley slidably installed in the slide groove, and the vibrator (5) is provided with a second pulley slidably installed in the slide groove; The power head (3) is connected to the first pulley via a first spring, the first spring being used to press the first pulley into the groove. The vibrator (5) is connected to the second pulley via a second spring, the second spring being used to press the second pulley into the groove.

5. The compaction pile construction equipment according to claim 1, characterized in that, The first wire rope is sleeved on the drum of the first hoisting device. The first wire rope is connected to the top loading point of the power head (3). The first wire rope is used to apply an upward pulling force to the power head (3). A second wire rope is fitted on the drum of the second winch device. The second wire rope is connected to the top loading point of the vibrator (5). The second wire rope is used to apply an upward tension to the vibrator (5).

6. The compaction pile construction equipment according to claim 5, characterized in that, The first winch device and the second winch device are both located on the upper surface of the mobile chassis (1). The mobile chassis (1) is provided with a first guide pulley at one end relative to the drill mast (2), and a second guide pulley is provided at the top of the drill mast (2). The first wire rope and the second wire rope pass around the first guide pulley and the second guide pulley.

7. The compaction pile construction equipment according to claim 5, characterized in that, A third steel wire rope is fitted on the drum of the third hoisting device. The first steel wire rope is connected to the bottom loading point of the power head (3). The third steel wire rope is used to apply a downward pulling force to the power head (3). The fourth hoisting device has a fourth steel wire rope fitted on its drum. The fourth steel wire rope is connected to the bottom loading point of the vibrator (5). The fourth steel wire rope is used to apply a downward pulling force to the vibrator (5).

8. The compaction pile construction equipment according to any one of claims 1-7, characterized in that, It also includes a metering hopper (9) for holding backfill material, the metering hopper (9) being connected to the inlet of the sleeve (6) via a feeding pipe.

9. A method for constructing compaction piles, used in the compaction pile construction equipment according to any one of claims 1-8, characterized in that, include: Step S1: Connect the power head (3) and the down-the-hole hammer (4), vibrator (5) and sleeve (6) so that the down-the-hole hammer (4) is fitted inside the sleeve (6) and a pile hole (01) is formed by root canal drilling. Step S2: Fill the pile hole (01) with filling material through the metering bucket (9); Step S3: Move the power head (3) and the vibrator (5) so that the bottom of the downhole hammer (4) and the bottom of the sleeve (6) are both moved to the top of the packing layer; Step S4, the vibrator (5) drives the sleeve (6) to perform in-situ vibration on the filler layer; In step S5, the power head (3) drives the down-the-hole hammer (4) to apply pressure to the filling layer to compact the filling layer. At the same time, the vibrator (5) drives the casing (6) to vibrate the filling layer to compact it. If the height of the filling layer is less than the same as the pile depth, then return to step S2.

10. The method for constructing compaction piles according to claim 9, characterized in that, The amount of filling material q in a single pass gradually increases from bottom to top along the axial direction of the pile hole (01).

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