Integrated full-stratum pile foundation construction equipment

Abstract

The utility model relates to the technical field of building construction equipment, in particular to integrated full-stratum pile foundation construction equipment which comprises a main body machine body, a pile-embracing static pressure device and a drilling system, and the pile-embracing static pressure device and the drilling system are fixedly arranged on the main body machine body. The drilling system comprises a base, a movable support, a hydraulic telescopic device, a drill tower, a power head and a spiral drilling tool, the base is fixedly arranged on the main machine body, the movable support is arranged on the base, the drill tower is fixedly arranged on the movable support, the power head is installed on the drill tower through a linear lifting device, and the power head can linearly move in the vertical direction of the drill tower. The spiral drilling tool is fixedly connected to an output shaft of the power head. According to the integrated full-stratum pile foundation construction equipment, the power head is installed on the drill tower through the linear lifting device, so that the lifting stability of the power head during working is guaranteed, and the defects that the drilling direction is inclined or the inner wall of a pipe core of a prefabricated concrete pipe pile is damaged due to shaking are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction equipment, in particular to an integrated full-stratum pile foundation construction equipment. Background Art

[0002] Precast concrete pipe piles, whose full name is prestressed high-strength concrete pipe piles, are a type of building material that is prefabricated in a prefabricated component processing plant, cured, and after reaching the strength required by national standards, it is transported to the construction site and driven into the ground by a pile driver. Precast concrete pipe piles are widely used in the construction field and can be used as engineering foundation piles and support piles. They have the advantages of high bearing capacity, good pile body quality, high strength, fast construction, low noise, and low pollution.

[0003] The construction methods of precast concrete pipe piles mainly include hammer pile driving method and static pile driving method. They can penetrate various soft soils, plain fill soils, plastic clay soils, silt soils, loose and slightly dense sand soils, and enter the bearing layer at the pile end. The bearing layer is generally hard plastic or hard clay soils, medium dense and above sand soils, crushed stone soils, strongly weathered rocks and medium weathered extremely soft rocks, etc. However, it is difficult to penetrate the hard soil layer or enter the hard soil layer deeply. Although there are pile tips for penetrating into the hard soil layer, due to the cost and the complexity of geological conditions, open pipe piles are mostly used in engineering. The construction equipment is mainly static pressure or hammer pile driver. In some projects, in order to solve the problem that the pipe pile cannot penetrate the hard interlayer, the lead hole method is adopted, that is, the drilling rig is used to drill a hole at the pile position first, and then the pile is sunk at the lead hole position. The disadvantages of this method are: first, the drilling rig is used to drill a hole at the pile position first, and the drilling rig is removed after the hole is formed, and the pile driver is then put in place to sink the pile. The process is cumbersome, involving many construction equipment and slow speed; second, the waiting period between the lead hole and the pile is long, and there are many interferences, which can easily cause the hole to collapse; third, the structure of the soil around the pile is greatly damaged after the hole collapses, which has an adverse effect on the friction resistance of the pile side. Therefore, concrete pipe piles are currently basically used in areas with soft soil or clay soil. Once there is a hard interlayer of sandy soil above the bearing layer of the pile end in addition to soft soil, clay soil or silt, the concrete pipe pile type will basically not be selected in the foundation design. Therefore, although the concrete pipe pile has many advantages, the current construction equipment and technology greatly limit the application scope of concrete pipe piles.

[0004] In order to solve the above problems, a Chinese utility model patent entitled "Concrete Pipe Pile Construction Equipment" with the authorization announcement number of CN209339143U discloses a concrete pipe pile construction equipment, wherein one end of the telescopic rod on the hydraulic system is mounted on the movable seat of the mobile support. The fixed seat of the mobile support is fixedly mounted on the set position of the fuselage of the static pile pressing device. A support frame is vertically fixed on the upper end surface of the movable seat of the mobile support, and a fixed pulley is installed on the upper end of the support frame. The base of the winch is fixedly mounted on the movable seat, and the end of the wire rope on the winch is fixedly mounted on the outer shell of the spiral drilling power head by passing around the fixed pulley. The power output shaft of the spiral drilling power head is fixedly connected to the upper end of the drill rod, and the upper end of the spiral drill tool is fixedly connected to the lower end of the drill rod. The drill tool casing is sleeved on the outside of the spiral drill tool, and the outer wall of the drill tool casing is fixed to the support frame through a connecting plate. The utility model solves the problem that open concrete pipe piles cannot be used in sites with hard soil interlayers above the pile end bearing layer, greatly increasing its application range.

[0005] However, the technical solution disclosed in the above utility model patent has the following disadvantages: the lifting and lowering of the spiral drilling power head is driven by the wire rope of the winch, and it cannot be guided in the vertical direction. When in use, the rotation of the spiral drilling power head itself may cause it to shake in the vertical direction, thereby causing the spiral drill connected to the spiral drilling power head to shake in the core of the precast concrete pipe pile. Not only is the drilling direction easy to be distorted, but the spiral drill is also easy to damage the inner wall of the core of the precast concrete pipe pile. At the same time, the precast concrete pipe pile has a large soil squeezing effect and is difficult to sink. Therefore, in order to solve the above-mentioned shortcomings in the prior art, an integrated full-stratum pile foundation construction equipment is proposed. Utility Model Content

[0006] In order to solve the above problems, the utility model provides an integrated full-stratum pile foundation construction equipment, which installs the power head on the drilling tower through a linear lifting device to ensure the stability of the lifting and lowering of the power head during work, and avoids defects such as distorted drilling direction or damage to the inner wall of the core of the precast concrete pipe pile due to shaking.

[0007] The technical solution of the utility model is as follows:

[0008] The integrated full-stratum pile foundation construction equipment comprises a main body, a pile-holding static pressure device and a drilling system, wherein the pile-holding static pressure device and the drilling system are fixedly arranged on the main body, and the drilling system comprises a base, a mobile support, a hydraulic telescopic device, a drilling tower, a power head and a spiral drilling tool. The base is fixedly arranged on the main body, and a mobile support is arranged on the base. The mobile support comprises a fixed seat and a mobile seat, and the fixed seat is fixed on the base. The mobile seat can move linearly along the left and right directions of the fixed seat under the drive of the hydraulic telescopic device. The drilling tower is fixedly arranged on the mobile seat, and the power head is installed on the drilling tower through a linear lifting device. The power head can move linearly along the up and down directions of the drilling tower, and the spiral drilling tool is fixedly connected to the output shaft of the power head.

[0009] A crane is arranged on the main body.

[0010] A reaction force counterweight is arranged on the main body at a position opposite to the crane.

[0011] The linear lifting device comprises a lifting support and a lifting drive mechanism, the power head is fixedly connected to the lifting support, the lifting support can be linearly slidably installed on the drilling tower along the up and down directions of the drilling tower, and the lifting drive mechanism drives the lifting support to rise and fall.

[0012] Grooves are arranged on the front and rear sides of the drilling tower, a guide hole matching the outer shape of the drilling tower is arranged at the center of the lifting support, the lifting support is sleeved on the drilling tower, and a boss matching the groove is arranged in the guide hole.

[0013] Lubricating oil grooves are provided on the front and rear sides of the drilling tower.

[0014] A reinforcing rod is arranged between the moving seat of the moving support and the drilling tower.

[0015] A groove A is provided on the side of the lifting support to avoid interference with the reinforcing rod.

[0016] The lifting drive mechanism includes a rack, a gear and a motor, wherein the rack is fixed on the bottom surface of the groove, the gear is meshed with the rack, the motor is fixed on the lifting support, and the output shaft of the motor is fixedly connected to the center of the gear.

[0017] The lifting support is provided with a slot B for the gear to pass through.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model discloses an integrated full-stratum pile foundation construction equipment, in which the power head is installed on the drilling tower through a linear lifting device to ensure the stability of the lifting of the power head during work, and avoids the defects of skewed drilling direction or damage to the inner wall of the core of the precast concrete pipe pile due to shaking;

[0020] 2. The utility model discloses an integrated full-stratum pile foundation construction equipment, which integrates the two functions of spiral drilling and static pile pressure to operate simultaneously. The two pile sinking methods can cooperate closely and work together to realize the pile sinking operation of precast concrete pipe piles in the full stratum;

[0021] The use of the equipment of the present invention eliminates the need to use a borehole drill and a static pile driver to perform operations alternately. The present invention can greatly enhance the safety of precast concrete pipe pile foundation construction, improve operating efficiency, and at the same time ensure that the pressed-in portion of the pile body will not be affected by equipment replacement or equipment posture adjustment in the middle, resulting in quality problems such as pile body verticality deviation, displacement, or even pile body damage.

[0022] 3. The utility model discloses an integrated full-stratum pile foundation construction equipment, which forms an empty hole with a diameter equivalent to the pipe core by spiral drilling under the pipe core, and brings out the drilled rock core by the rotation of the spiral blade, thereby effectively reducing the soil squeezing effect of the precast pile during the pile foundation construction.

[0023] 4. The utility model discloses an integrated full-stratum pile foundation construction equipment. The integrated full-stratum pile foundation construction equipment is different from other drilling and hole-guiding methods. The present invention uses a spiral drill tool that matches the specifications of the pipe pile to extend into the lower part of the pipe pile core for drilling. While the drill tool brings out the rock core, a small-diameter empty hole equivalent to the diameter of the pipe core is formed in the rock and soil body below the pipe pile, aiming to destroy the original structure of the rock and soil body below the pipe pile core, so that the pore pressure of the rock and soil body around the empty hole is released, and the static pile pressing device presses the pile at the same time when spiral drilling in the hole, which can quickly squeeze the rock and soil body below the pile pipe wall into the middle empty hole in time to achieve pile sinking. This solves the shortcomings of the previous drilling and hole-guiding method that the hole is easy to collapse and weaken the friction resistance of the pile side. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0025] In the attached picture:

[0026] Figure 1 It is a schematic diagram of the overall structure of an integrated full-stratum pile foundation construction equipment according to an embodiment of the utility model;

[0027] Figure 2 A structural schematic diagram of a drilling system of an integrated full-stratum pile foundation construction equipment according to an embodiment of the utility model;

[0028] Figure 3 A schematic diagram of the working state of a drilling system of an integrated full-stratum pile foundation construction device according to an embodiment of the utility model;

[0029] Figure 4 for Figure 2 Middle AA section view;

[0030] The components represented by the reference numerals in the figure are:

[0031] The utility model: 1. main body, 2. crane, 3. pile-holding static pressure device, 4. base, 5. reaction force counterweight, 6. precast concrete pipe pile, 7. power head, 8. spiral drilling tool, 9. drilling tower, 9a. groove, 9b. lubricating oil groove, 10. movable support, 11. hydraulic telescopic device, 12. linear lifting device, 12a. lifting support, 12a1. groove A, 12a2. boss, 12a3. groove B, 12b. rack, 12c. gear, 12d. motor, 12e. motor bracket, 13. casing, 14. reinforcing rod. DETAILED DESCRIPTION Example

[0032] like Figure 1 As shown, the integrated full-stratum pile foundation construction equipment includes a main body 1, a pile-holding static pressure device 3 and a drilling system; the pile-holding static pressure device and the drilling system are fixedly arranged on the main body 1.

[0033] like Figure 2 and Figure 3 As shown, the drilling system includes a base 4, a mobile support 10, a hydraulic telescopic device 11, a drilling tower 9, a power head 7 and a spiral drilling tool 8. The base 4 is fixedly arranged on the main body 1, and the mobile support 10 is arranged on the base 4. The mobile support 10 includes a fixed seat and a mobile seat. The fixed seat is fixed on the base 4. The mobile seat can move linearly along the left and right directions of the fixed seat under the drive of the hydraulic telescopic device 11. The drilling tower 9 is fixedly arranged on the mobile seat. The power head 7 is installed on the drilling tower 9 through a linear lifting device 12. The power head 7 can move linearly along the up and down directions of the drilling tower 9. The spiral drilling tool 8 is fixedly connected to the output shaft of the power head 7.

[0034] The specific structure of the movable support 10 is shown in the Chinese utility model patent with the authorization announcement number CN 209339143 U and the name of which is a concrete pipe pile construction equipment.

[0035] like Figure 1 As shown, a crane 2 is provided on the main body 1 , and a reaction weight 5 is provided on the main body 1 at a position opposite to the crane 2 .

[0036] like Figure 4 As shown, the linear lifting device 12 includes a lifting support 12a and a lifting drive mechanism. The power head 7 is fixedly connected to the lifting support 12a. The lifting support 12a can be installed on the drilling tower 9 in a linear sliding manner along the up and down directions of the drilling tower 9. The lifting drive mechanism drives the lifting support 12a to rise and fall.

[0037] Grooves 9a are provided on the front and rear sides of the drilling tower 9, a guide hole matching the outer shape of the drilling tower 9 is provided at the center of the lifting support 12a, the lifting support 12a is sleeved on the drilling tower 9, and a boss 12a2 matching the groove 9a is provided in the guide hole, which is equivalent to a structural form in which the drilling tower 9 is a guide rail and the lifting support 12a is a slider.

[0038] Lubricating oil grooves 9 b are provided on the front and rear sides of the drilling tower 9 , and grease is applied to the lubricating oil grooves 9 b to lubricate the relative sliding between the lifting support 12 a and the drilling tower 9 .

[0039] In order to ensure the stability of the drilling tower 9 , a reinforcing rod 14 is provided between the moving seat of the moving support 10 and the drilling tower 9 .

[0040] When the lifting support 12a slides on the drilling tower 9, it will inevitably pass through the part where the drilling tower 9 is connected to the reinforcing rod 14. A groove A12a1 is provided on the side of the lifting support 12a to avoid interference with the reinforcing rod 14. The width of the groove A12a1 should be greater than the maximum external dimension of the reinforcing rod 14.

[0041] The lifting drive mechanism includes a rack 12b, a gear 12c and a motor 12d, wherein the rack 12b is fixed on the bottom surface of the groove 9a, the gear 12c is meshed with the rack 12b, the motor 12d is fixed on the lifting support 12a through a motor bracket 12e, and the output shaft of the motor 12d is fixedly connected to the center of the gear 12c; a slot B12a3 is provided on the lifting support 12a for the gear 12c to pass through.

[0042] The groove A12a1 is arranged along the height direction of the lifting support 12a, and its length should be consistent with the height of the lifting support 12a, while the groove B12a3 cannot be consistent with the height of the lifting support 12a. If the heights are consistent, the lifting support 12a cannot be integrated into the drilling tower 9. Therefore, the length of the groove B12a3 can only be less than the height of the lifting support 12a, and only needs to allow the gear 12c to pass through it and engage with the rack 12b.

[0043] The integrated full-stratum pile foundation construction equipment installs the power head on the drilling tower through a linear lifting device to ensure the stability of the power head when it is working, and avoids defects such as deviation of the drilling direction or damage to the inner wall of the precast concrete pipe pile due to shaking. Example

[0044] The integrated full-ground pile foundation construction equipment mainly includes a drilling system and a static pile driving system. Its main feature is that the drilling system and the static pile driving system are integrated and carried out simultaneously in coordination with each other. It can be applied to full-ground pile driving of precast concrete pipe piles.

[0045] The static pile pressure system includes a main body 1, a reaction weight 5, a crane 2, a pile-holding static pressure device 3, etc., which is a known technology.

[0046] The drilling system mainly includes a drilling tower 9, a power head 7, a spiral drilling tool 8 matched with a pipe pile, a casing 13, a clamp, and an automatic displacement device of the drilling tower.

[0047] The spiral drill 8 matched with the pipe pile can extend into the core of the precast concrete pipe pile 6 to the bottom of the pile hole, and spirally drill downward in the core while statically pressing the pile; the automatic displacement device of the drilling tower includes a hydraulic telescopic device 11 and a movable support 10, wherein the movable support includes a fixed seat and a movable seat, and the movable seat can move forward and backward along the fixed seat; one end of the telescopic rod on the hydraulic telescopic device is installed on the movable seat of the movable support 10, and the movable seat can be controlled to move forward and backward through its telescopic movement. The fixed seat of the movable support 10 is fixed at the set position of the main body. The drilling tower 9 is set on the movable seat, and can carry the spiral drilling system to move forward and backward along the automatic displacement device of the drilling tower, and control the spiral drill to move forward to align with the core of the precast concrete pipe pile 6 to drill downward or retreat and retract.

[0048] The integrated full-stratum pile foundation construction equipment has the following process characteristics:

[0049] In the first step, the main body of the equipment is moved to the pile position and the body is adjusted to be stable (known technology);

[0050] The second step is to hoist the precast concrete pipe pile to the middle of the pile-holding static pile-driving device and use the pile-holding method to statically drive the pile (known technology);

[0051] The third step is to move the auger forward by the automatic auger displacement device while the pile is being statically pressed, until the auger 8 is aligned with the core of the precast concrete pile 6;

[0052] In the fourth step, the power head 7 and the auger 8 move downward along the drilling tower 9, and the auger 8 extends into the core of the precast concrete pile 6 and continues downward to the stratum at the bottom of the pile hole;

[0053] In the fifth step, the power head 7 drives the spiral drill 8 to spirally drill downward, destroying the original structure of the stratum below the pipe core and bringing out the drilled rock core through the rotation of the spiral blades, forming a hole with a diameter equivalent to the pipe core under the pile end, so that the pore pressure of the rock and soil around the hole is released. In this process, the static pressure device continues to sink the pile downward, and the two are carried out simultaneously to sink the pipe pile to the designed depth.

[0054] Step 6: If a pile needs to be connected after a section of pile is sunk, the power head and the spiral drill are lifted upward along the tower, the spiral drill is pulled out of the pipe core of the pile and separated from the pile-holding static pressure device, and the automatic displacement device of the drilling tower moves the drilling tower backward; the second section of the pile is hoisted into place to connect with the first section of the pile, and the third and fourth steps are repeated. After the pile is connected, the length of the spiral drill is not enough to reach the bottom of the pile hole. At this time, the lower drill is clamped on the upper end of the pile by a clamp so that it will not fall to the bottom of the hole, the power head is lifted to a certain height along the tower, and a section of the spiral drill is connected, and the fifth step is repeated;

[0055] The fixture is a "U"-shaped plate structure, and a slot matching the fixture is provided at the end of the spiral drill 8. The fixture is inserted into the slot, and the outer dimensions of the fixture are larger than the diameter of the core of the precast concrete pipe pile 6. Therefore, the fixture can be placed on the top of the precast concrete pipe pile 6 to prevent the spiral drill 8 from falling to the bottom of the hole.

[0056] Step 7. When the construction of one pile is completed, the power head and the auger drill are lifted upward along the tower, the auger is pulled out from the pipe core of the pile and detached from the pile-holding static pressure device, and the automatic shifting device of the drilling tower moves the drilling tower backward; the main body of the equipment moves to the next pile position to continue construction.

[0057] The integrated full-stratum pile foundation construction equipment integrates the two functions of spiral drilling and static pile driving and operates simultaneously. The two pile driving methods can cooperate closely and work together to realize the pile driving operation of precast concrete pipe piles in the full stratum.

[0058] The use of the equipment of the present invention eliminates the need to alternately use a borehole drill and a static pile driver. Therefore, the present invention can greatly enhance the safety of precast concrete pipe pile foundation construction, improve operating efficiency, and at the same time ensure that the pressed-in part of the pile body will not be affected by the replacement of equipment or the adjustment of equipment posture in the middle, resulting in quality problems such as pile body verticality deviation, displacement, or even damage to the pipe pile body;

[0059] The spiral drilling below the pipe core forms an empty hole with the same diameter as the pipe core, and the crushed rock core is brought out by the rotation of the spiral blade, which can effectively reduce the soil squeezing effect of the precast pile during the pile foundation construction;

[0060] Different from other drilling and hole-guiding methods, the present invention uses a spiral drill tool that matches the specifications of the pipe pile to extend into the lower part of the pipe pile core for drilling. While the drill tool brings out the rock core, a small-diameter empty hole equivalent to the diameter of the pipe core is formed in the rock and soil body below the pipe pile, aiming to destroy the original structure of the rock and soil body below the pipe pile core, so that the pore pressure of the rock and soil body around the empty hole is released, and the static pile pressing device presses the pile at the same time while spiral drilling in the hole, which can quickly squeeze the rock and soil body below the pile wall into the middle empty hole in time to achieve pile sinking. This solves the shortcomings of the previous drilling and hole-guiding method that the hole is easy to collapse and weaken the friction resistance of the pile side.

Claims

1. An integrated full-stratum pile foundation construction device, comprising a main body (1), a pile-holding static pressure device (3) and a drilling system, wherein the pile-holding static pressure device (3) and the drilling system are fixedly arranged on the main body (1), characterized in that: The drilling system comprises a base (4), a mobile support (10), a hydraulic telescopic device (11), a drilling tower (9), a power head (7) and a spiral drilling tool (8); the base (4) is fixedly arranged on a main body (1); the mobile support (10) is arranged on the base (4); the mobile support (10) comprises a fixed seat and a mobile seat; the fixed seat is fixed on the base (4); the mobile seat can move linearly along the left and right directions of the fixed seat under the drive of the hydraulic telescopic device (11); the drilling tower (9) is fixedly arranged on the mobile seat; the power head (7) is installed on the drilling tower (9) via a linear lifting device (12); the power head (7) can move linearly along the up and down directions of the drilling tower (9); and the spiral drilling tool (8) is fixedly connected to the output shaft of the power head (7).

2. The integrated full-stratum pile foundation construction equipment according to claim 1, characterized in that: A crane (2) is arranged on the main body (1).

3. The integrated full-stratum pile foundation construction equipment according to claim 2, characterized in that: A reaction force counterweight (5) is provided on the main body (1) at a position opposite to the crane (2).

4. The integrated full-stratum pile foundation construction equipment according to claim 1, characterized in that: The linear lifting device (12) comprises a lifting support (12a) and a lifting drive mechanism, the power head (7) is fixedly connected to the lifting support (12a), the lifting support (12a) can be installed on the drilling tower (9) in a linear sliding manner along the vertical direction of the drilling tower (9), and the lifting drive mechanism drives the lifting support (12a) to move up and down.

5. The integrated full-stratum pile foundation construction equipment according to claim 4, characterized in that: Grooves (9a) are provided on the front and rear sides of the drilling tower (9), a guide hole matching the outer shape of the drilling tower (9) is provided at the center of the lifting support (12a), the lifting support (12a) is sleeved on the drilling tower (9), and a boss (12a2) matching the groove (9a) is provided in the guide hole.

6. The integrated full-stratum pile foundation construction equipment according to claim 5, characterized in that: Lubricating oil grooves (9b) are provided on the front and rear sides of the drilling tower (9).

7. The integrated full-stratum pile foundation construction equipment according to claim 5, characterized in that: A reinforcing rod (14) is provided between the moving seat of the moving support (10) and the drilling tower (9).

8. The integrated full-stratum pile foundation construction equipment according to claim 7, characterized in that: A groove A (12a1) is provided on the side of the lifting support (12a) to avoid interference with the reinforcing rod (14).

9. The integrated full-stratum pile foundation construction equipment according to claim 5, characterized in that: The lifting drive mechanism comprises a rack (12b), a gear (12c) and a motor (12d); the rack (12b) is fixed on the bottom surface of the groove (9a); the gear (12c) is meshed with the rack (12b); the motor (12d) is fixedly arranged on the lifting support (12a); and the output shaft of the motor (12d) is fixedly connected to the center of the gear (12c).

10. The integrated full-stratum pile foundation construction equipment according to claim 9, characterized in that: The lifting support (12a) is provided with a slot B (12a3) for the gear (12c) to pass through.

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