Drilling machine and inclined pile construction method suitable for high-restricted steel pipe inclined pile into rock construction

Abstract

The application discloses a drilling machine and a construction method of a high-restriction steel pipe inclined pile suitable for site rock construction, and the drilling machine comprises a base assembly, a walking mechanism, a drilling mechanism and a hydraulic support leg; the drilling machine further comprises a cantilever steel beam, a rotating mechanism, a tower and an inclination adjusting mechanism; the cantilever steel beam is arranged on the front side of the base assembly; the rotating mechanism comprises a rotating seat rotatably arranged on the cantilever steel beam and a first driving assembly for driving the rotating seat to rotate; the tower is hinged to the rotating seat around a horizontal rotating shaft, and the drilling mechanism is arranged on the tower; and the inclination adjusting mechanism is used for driving the tower to rotate in the pitching direction relative to the rotating seat. The application can break through the space restriction by changing the direction of the tower and the drilling mechanism, can better adapt to the construction environment of the site with a large number of adjacent existing buildings, fences, underground facilities or the edge of the retaining pile, expands the application range of the steel pipe rock construction, and provides a feasible construction scheme for more similar projects.

Description

Technical Field

[0001] This invention relates to the field of inclined pile construction technology for foundation pits, and in particular to a drilling rig and inclined pile construction method for rock-inserted steel pipe inclined piles applicable to sites with high site restrictions. Background Technology

[0002] In urban construction, foundation pit support is a crucial aspect of ensuring safety. Steel pipe inclined piles, as an effective form of internal support, have attracted considerable attention due to their reasonable stress distribution and good stability. However, in space-constrained sites (such as those adjacent to existing buildings, walls, underground facilities, or the edges of retaining piles), constructing steel pipe inclined piles using conventional drilling rigs faces significant challenges.

[0003] Specifically, since conventional steel pipe inclined pile drilling rigs are typically about 7 meters long and 2.2 meters wide, current drilling rigs require at least 7 meters of working space when drilling inclined piles. However, to meet the stress requirements of the foundation pit support, the inclined pile hole position needs to be as close as possible to the capping beam or lintel beam at the edge of the foundation pit (ideally within 4 meters). This creates a key contradiction: in narrow spaces (e.g., with only about 3.5 meters of usable space), existing drilling rigs, due to their size and operating space requirements, cannot complete the inclined pile drilling at the predetermined position close to the capping beam / lintel beam. Space constraints prevent the use of efficient internal support methods like steel pipe inclined piles, forcing projects to choose other support schemes that are more expensive, have longer construction periods, or are less stable (such as using large amounts of concrete and steel reinforcement for internal support or using external anchors). Summary of the Invention

[0004] In view of this, the present invention proposes a drilling rig and inclined pile construction method for rock-inserted steel pipe piles applicable to site with high limitations, with the aim of realizing inclined pile construction in foundation pits when space is limited.

[0005] The solution provided by the first aspect of the present invention includes:

[0006] A drilling rig suitable for rock-insertion construction of inclined steel pipe piles in areas with high site restrictions, the drilling rig includes a base assembly, a traveling mechanism, a drilling mechanism, and hydraulic outriggers;

[0007] It also includes cantilever steel beams, a rotating mechanism, a tower, and a tilt adjustment mechanism;

[0008] The cantilevered steel beam is located on the front side of the base assembly;

[0009] The rotating mechanism includes a rotating seat rotatably mounted on the cantilever steel beam and a first driving component for driving the rotating seat to rotate.

[0010] The tower is hinged to the rotating base around a horizontal pivot, and the drilling mechanism is mounted on the tower.

[0011] The tilt adjustment mechanism is used to drive the tower to rotate relative to the rotating base in the pitch direction.

[0012] As a further alternative, the rotation center line of the rotating base is eccentrically positioned away from the bottom end of the tower relative to the center line in the width direction of the base assembly.

[0013] As a further optional solution, the tower includes a first tower and a second tower, the first tower being hinged to the rotating seat about a horizontal pivot, the second tower being slidably mounted on the first tower, and the drilling mechanism being slidably mounted on the second tower; the first tower is provided with a first hydraulic cylinder for driving the second tower to slide, and the second tower is provided with a second hydraulic cylinder for driving the drilling mechanism to slide.

[0014] As a further optional solution, the rotating mechanism also includes a fixed seat disposed on the cantilever steel beam and a transmission gear ring disposed at the bottom of the rotating seat;

[0015] The fixed base is provided with a limiting outer ring;

[0016] The transmission gear ring is an internal gear ring structure, and the transmission gear ring is coaxially arranged with the limiting outer ring;

[0017] The first drive assembly includes a transmission gear and a hydraulic motor for driving the transmission gear to rotate, the transmission gear meshing with the transmission gear ring.

[0018] As a further optional solution, the fixing base also includes a top plate, a bottom plate, and a multi-layer support cylinder disposed between the two. The limiting outer ring is disposed on the top of the top plate, and a central support block is also provided at the top center of the top plate. Multiple steel vertical plates distributed circumferentially are provided on the outer side of the support cylinder.

[0019] As a further optional solution, the clearance height of the cantilevered steel beam above the ground is not less than 150mm, but the cantilevered steel beam is sunken by at least 100mm relative to the base assembly.

[0020] As a further alternative, the tilt adjustment mechanism is a hydraulic cylinder, one end of which is hinged to the rotating seat and the other end of which is hinged to the tower.

[0021] As a further optional feature, the lower end of the tower is provided with telescopic legs, and the bottom of the telescopic legs is provided with insert teeth.

[0022] As a further optional solution, the cantilevered steel beam is equipped with auxiliary hydraulic outriggers.

[0023] The solution provided by the second aspect of the present invention includes:

[0024] A method for constructing inclined piles, using any of the above-mentioned drilling rigs;

[0025] The drilling rig was moved to the designated construction location.

[0026] The tower is raised using a tilt adjustment mechanism;

[0027] The tower is rotated using a rotating mechanism, so that the tower is changed from being arranged in the length direction of the base assembly to being arranged in the width direction of the base assembly;

[0028] Adjust the tower's tilt angle and carry out drilling operations.

[0029] Compared with existing technologies, the drilling rig and inclined pile construction method for rock-inserting steel pipe piles in applicable sites with high site restrictions proposed in this application have at least the following advantages:

[0030] The drilling rig described in this application can rotate the tower and drilling mechanism, and switch the working direction from the length direction to the width direction while keeping the base assembly fixed. Even if the working space cannot meet the overall length of the drilling rig, as long as the overall width of the drilling rig can be met, the spatial constraints can be overcome by changing the direction of the tower and drilling mechanism. This allows it to better adapt to construction environments with limited space, such as sites adjacent to existing buildings, walls, underground facilities, or retaining pile edges. It expands the application scope of steel pipe rock-inserted inclined pile construction, provides feasible construction solutions for more similar projects, avoids the need to adopt secondary solutions such as internal concrete supports or external anchors due to insufficient space, and ensures the rationality of the stress and the economy of the project for inclined pile support. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a drilling rig suitable for rock drilling with steel pipe inclined piles in high-restriction sites according to an embodiment of the present invention (the tower is set along the overall length of the drilling rig).

[0032] Figure 2 This is a schematic diagram of a drilling rig suitable for rock drilling with high site restrictions using steel pipe inclined piles (the tower is set along the width of the drilling rig as a whole).

[0033] Figure 3 This is a schematic diagram of the construction status of a drilling rig applicable to rock drilling with high site restrictions according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the transmission structure of the rotating mechanism in an embodiment of the present invention;

[0035] Figure 5 This is a cross-sectional schematic diagram of the rotating mechanism in an embodiment of the present invention;

[0036] Figure 6This is a schematic diagram of the structure of the supporting cylinder and the steel vertical plate in an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram illustrating how the drilling rig's tower, even after being set along the width of the entire drilling rig, still cannot correspond to the pile driving position in an embodiment of the present invention.

[0038] Figure 8 Is Figure 7 This is a diagram illustrating the initial excavation process.

[0039] In the picture: 1. Base assembly;

[0040] 2. Walking mechanism;

[0041] 3. Drilling mechanism;

[0042] 4. Hydraulic outriggers;

[0043] 5. Cantilever steel beam; 51. Auxiliary hydraulic outriggers;

[0044] 6. Rotating mechanism; 61. Rotating seat; 611. Transmission gear ring; 62. First drive assembly; 621. Transmission gear; 622. Hydraulic motor; 63. Fixed seat; 631. Limiting outer ring; 632. Top plate; 633. Bottom plate; 634. Support cylinder; 635. Central support block; 636. Steel vertical plate;

[0045] 7. Tower; 71. First tower; 711. First hydraulic cylinder; 72. Second tower; 721. Second hydraulic cylinder;

[0046] 8. Tilt adjustment mechanism;

[0047] 9. Telescopic outriggers. Detailed Implementation

[0048] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0049] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] refer to Figure 1-8 An embodiment of the present invention illustrates a drilling rig suitable for rock-inserting construction of inclined steel pipe piles in areas with high site restrictions. The drilling rig includes a base assembly 1, a traveling mechanism 2, a drilling mechanism 3, and hydraulic outriggers 4; it also includes a cantilever steel beam 5, a rotating mechanism 6, a tower 7, and an inclination adjustment mechanism 8; the cantilever steel beam 5 is disposed on the front side of the base assembly 1; the rotating mechanism 6 includes a rotating seat 61 rotatably disposed on the cantilever steel beam 5 and a first driving component 62 for driving the rotating seat 61 to rotate; the tower 7 is hinged to the rotating seat 61 about a horizontal pivot, and the drilling mechanism 3 is disposed on the tower 7; the inclination adjustment mechanism 8 is used to drive the tower 7 to rotate relative to the rotating seat 61 in the pitch direction.

[0053] In application, the drilling rig is moved to the location to be worked on, and then the tilt adjustment mechanism 8 is used to raise the tower 7, such as... Figure 1 As shown; then, the tower 7 is rotated using the rotating mechanism 6, so that the tower 7 changes from being positioned along the length direction of the base assembly 1 to being positioned along the width direction of the base assembly 1, as shown. Figure 2 and Figure 3 As shown; finally, adjust the tilt angle of tower 7 and carry out drilling operations.

[0054] In this embodiment, the drilling rig can rotate the tower 7 and the drilling mechanism 3. With the base assembly 1 fixed, the working direction can be switched from the length direction to the width direction. Even if the working space cannot meet the overall length of the drilling rig, as long as the overall width of the drilling rig can be met, the spatial constraints can be overcome by changing the direction of the tower 7 and the drilling mechanism 3. This allows for better adaptation to construction environments with limited space, such as areas near existing buildings, walls, underground facilities, or retaining pile edges. It expands the application range of steel pipe rock-inserted inclined pile construction, provides feasible construction solutions for more similar projects, avoids the need to adopt secondary solutions such as internal concrete supports or external anchors due to insufficient space, and ensures the rationality of the force and the economy of the inclined pile support.

[0055] The base assembly 1 includes an oil tank, an electrical control box, and other components. The walking mechanism 2 can be a tracked walking mechanism 2. In this embodiment, there is no improvement to the base assembly 1, the walking mechanism 2, the drilling mechanism 3, or the hydraulic outriggers 4. Existing technologies can be directly referenced.

[0056] In some embodiments, such as Figure 4 As shown, the rotation center line M of the rotating base 61 is eccentrically positioned relative to the center line L in the width direction of the base assembly 1, moving away from the bottom end of the tower 7. Specifically, the center line L in the width direction of the base assembly 1 is offset from the rotation center line M of the rotating base 61 by 20-50mm.

[0057] In contrast to the existing centerline design of drilling rigs, this embodiment uses an eccentric design. When the tower 7 rotates 90° to operate in the width direction of the vehicle body, the line of action of the drilling reaction force shifts significantly to the side of the vehicle body. The support reaction arm of the traditional centrally symmetrical design is severely insufficient, resulting in a disruptive moment. This embodiment reconstructs the load transfer path by actively eccentricating the rotation centerline away from the bottom of the tower 7. The shifted rotation center causes the self-weight of the tower 7 to generate an anti-overturning moment (the gravitational moment and the overturning moment are in opposite directions). This embodiment can ensure the dynamic stability of the drilling rig during lateral construction in narrow spaces without increasing the vehicle weight or enlarging the vehicle body, meeting the anti-overturning requirements of the foundation pit safety regulations for mobile construction equipment.

[0058] In some embodiments, such as Figure 1 As shown, the tower 7 includes a first tower 71 and a second tower 72. The first tower 71 is hinged to the rotating seat 61 about a horizontal pivot. The second tower 72 is slidably disposed on the first tower 71. The drilling mechanism 3 is slidably disposed on the second tower 72. The first tower 71 is provided with a first hydraulic cylinder 711 for driving the second tower 72 to slide, and the second tower 72 is provided with a second hydraulic cylinder 721 for driving the drilling mechanism 3 to slide.

[0059] In this embodiment, the tower 7 is a double-layer sliding tower structure. Through the telescopic nesting design of the first tower 71 and the second tower 72, the two-stage stroke extension of the drilling mechanism 3 is realized, which better adjusts the hole position distance and transforms the fixed working height of the traditional single tower 7 into a three-dimensional construction envelope space that can dynamically adapt to the pit depth.

[0060] In some embodiments, to stably achieve rotational adjustment of the tower 7, for example, it can be rotated 90° to the left or right or fixed to the left or right, with the tilt angle of the tower 7 ranging from 45° to 90°. Figure 4 and Figure 5 As shown, the rotating mechanism 6 further includes a fixed seat 63 disposed on the cantilever steel beam 5 and a transmission gear ring 611 disposed at the bottom of the rotating seat 61; the fixed seat 63 is provided with a limiting outer ring 631; the transmission gear ring 611 is an internal gear ring structure, and the transmission gear ring 611 and the limiting outer ring 631 are coaxially disposed; the first driving component 62 includes a transmission gear 621 and a hydraulic motor 622 for driving the transmission gear 621 to rotate, and the transmission gear 621 meshes with the transmission gear ring 611.

[0061] The transmission gear ring 611 and the limiting outer ring 631, which are coaxially arranged, form a double constraint. The transmission gear ring 611 bears the driving torque of the hydraulic motor 622 and realizes active rotation control. The limiting outer ring 631 wraps around the bottom of the rotating seat 61 to resist the lateral impact load when the drill bit enters the rock. It can avoid backlash jump caused by off-center load.

[0062] In addition, combined Figure 6 The fixed base 63 also includes a top plate 632, a bottom plate 633, and a multi-layer support cylinder 634 disposed between the two. The limiting outer ring 631 is disposed on the top of the top plate 632, and a central support block 635 is also provided at the top center of the top of the top plate 632. Multiple steel vertical plates 636 distributed circumferentially are provided on the outer side of the support cylinder 634.

[0063] The top plate 632, multi-layer support cylinder 634, and bottom plate 633 are vertically stacked. The top plate 632 directly bears the rotational load of the limiting outer ring 631. The multi-layer support cylinder 634 dissipates impact energy in layers, and the bottom plate 633 evenly distributes the concentrated load to the cantilever steel beam 5. The circumferentially distributed steel vertical plates 636 are welded to the multi-layer support cylinder 634 to form a three-dimensional grid. The steel vertical plates 636 resist the tangential force generated by the rotating mechanism 6, and the support cylinder 634 bears the axial pressure. The central support block 635 set at the top of the top plate 632 provides a rotation axis reference, which works in conjunction with the constraint radial offset of the limiting outer ring 631.

[0064] The top plate 632, bottom plate 633, supporting cylinder 634, central supporting block 635, and steel vertical plate 636 are welded together.

[0065] In some embodiments, such as Figure 1 As shown, the clear height of the cantilever steel beam 5 above the ground is not less than 150mm, but the cantilever steel beam 5 is sunken by at least 100mm relative to the base assembly 1.

[0066] In contrast to existing drilling rigs that mount the tower, drilling mechanism, and other components onto the base assembly, this embodiment configures the cantilevered steel beam 5 to be recessed at least 100mm below the base assembly 1. This directly reduces the height of the mounting base between the rotating mechanism 6 and the tower 7, lowering the overall center of gravity of the drilling rig and effectively improving its anti-overturning stability. Furthermore, lowering the center of gravity also shortens the impact load transmission path and suppresses the impact of construction vibrations on positioning accuracy.

[0067] In some embodiments, the tilt adjustment mechanism 8 is a hydraulic cylinder, one end of which is hinged to the rotating seat 61 and the other end of which is hinged to the tower 7.

[0068] The first drive component 62 in the rotating mechanism 6 is powered by a hydraulic motor 622, and the tilt adjustment mechanism 8 also uses a hydraulic cylinder. Both can be connected to the oil tank (hydraulic control unit) on the base assembly 1, which facilitates the modification of existing drilling rigs.

[0069] In some embodiments, such as Figure 1 and Figure 3 As shown, the lower end of the tower 7 is provided with telescopic legs 9, and the bottom of the telescopic legs 9 is provided with insert teeth (not marked in the figure).

[0070] After the tower 7 is tilted and positioned, the telescopic outriggers 9 immediately extend and touch the ground, and the insert teeth are inserted into the soil layer to form an auxiliary support point independent of the vehicle body. This directly introduces the vibration load of the tower 7 and the drilling mechanism 3 into the foundation, further improving construction stability and overturning resistance.

[0071] In some embodiments, such as Figure 3 and Figure 4 As shown, the cantilever steel beam 5 is equipped with auxiliary hydraulic outriggers 51. These outriggers 51 prevent end deflection and torsional deformation of the cantilever steel beam 5 under lateral loads, and further improve its anti-overturning stability.

[0072] In some applications, such as Figure 7 As shown, in situations where space is extremely limited, even after moving the drilling rig into position and changing the working direction to the width direction, the corresponding piling location may still not be met; for example... Figure 8 As shown, excavation can be carried out first to sink the work site a certain distance, which corresponds to the pile driving position.

[0073] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0074] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be considered within the scope of protection of the present invention. For example, the tower 7 can be rotated 90° to the left or right or fixed to the left or right. The tilt angle of the tower 7 is in the range of 45° to 90°.

Claims

1. A steel pipe inclined pile drilling rig suitable for high site restrictions, the drilling rig comprising a base assembly, a traveling mechanism, a drilling mechanism, and hydraulic outriggers, characterized in that: It also includes cantilever steel beams, a rotating mechanism, a tower, and a tilt adjustment mechanism; The cantilevered steel beam is located on the front side of the base assembly; The rotating mechanism includes a rotating seat rotatably mounted on the cantilever steel beam and a first driving component for driving the rotating seat to rotate. The tower is hinged to the rotating base around a horizontal pivot, and the drilling mechanism is mounted on the tower. The tilt adjustment mechanism is used to drive the tower to rotate relative to the rotating base in the pitch direction; The rotation center line of the rotating base is offset away from the bottom end of the tower relative to the center line in the width direction of the base assembly; The tower includes a first tower and a second tower. The first tower is hinged to the rotating seat about a horizontal pivot. The second tower is slidably mounted on the first tower. The drilling mechanism is slidably mounted on the second tower. The first tower is provided with a first hydraulic cylinder for driving the second tower to slide, and the second tower is provided with a second hydraulic cylinder for driving the drilling mechanism to slide. The rotating mechanism also includes a fixed seat disposed on the cantilever steel beam and a transmission gear ring disposed at the bottom of the rotating seat; The fixed base is provided with a limiting outer ring; The transmission gear ring is an internal gear ring structure, and the transmission gear ring is coaxially arranged with the limiting outer ring; The first drive assembly includes a transmission gear and a hydraulic motor for driving the transmission gear to rotate, the transmission gear meshing with the transmission gear ring; The fixed base also includes a top plate, a bottom plate, and a multi-layer support cylinder disposed between the two. The limiting outer ring is disposed on the top of the top plate, and a central support block is also provided at the top center of the top plate. Multiple steel vertical plates distributed circumferentially are provided on the outer side of the support cylinder. The clearance height of the cantilevered steel beam above the ground shall not be less than 150mm, but the cantilevered steel beam shall be at least 100mm lower than the base assembly.

2. The steel pipe inclined pile rock drilling rig applicable to high site restrictions as described in claim 1, characterized in that: The tilt adjustment mechanism is a hydraulic cylinder, one end of which is hinged to the rotating seat and the other end of which is hinged to the tower.

3. The steel pipe inclined pile rock drilling rig applicable to high site restrictions as described in claim 1, characterized in that: The lower end of the tower is provided with telescopic legs, and the bottom of the telescopic legs is provided with insert teeth.

4. The steel pipe inclined pile rock drilling rig applicable to high site restrictions as described in claim 1, characterized in that: The cantilevered steel beam is equipped with auxiliary hydraulic outriggers.

5. A method for constructing inclined steel pipe piles into rock under high site constraints, characterized in that, Construction shall be carried out using any one of the drilling rigs described in claims 1-4; The drilling rig was moved to the designated construction location. The tower is raised using a tilt adjustment mechanism; The tower is rotated using a rotating mechanism, so that the tower is changed from being arranged in the length direction of the base assembly to being arranged in the width direction of the base assembly; Adjust the tower's tilt angle and carry out drilling operations.

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