Drilling machine suitable for field height limitation inclined pile construction and inclined pile construction method

Abstract

The invention discloses a drilling machine suitable for field height limitation inclined pile construction. The drilling machine comprises a base assembly, a walking mechanism, a drilling mechanism and hydraulic supporting legs. The device further comprises a cantilever steel beam, a rotating mechanism, a tower and an inclination angle adjusting mechanism. The cantilever steel beam is arranged on the front side of the base assembly; the rotating mechanism comprises a rotating base rotationally arranged on the cantilever steel beam and a first driving assembly used for driving the rotating base to rotate. The tower frame is hinged to the rotating seat around a horizontal rotating shaft, and the drilling mechanism is arranged on the tower frame; the inclination angle adjusting mechanism is used for driving the tower to rotate in the pitching direction relative to the rotating base. Space restriction can be broken through by changing the directions of the tower and the drilling mechanism, the device can better adapt to the construction environment of a large number of space-limited sites close to existing buildings, enclosing walls, underground facilities or soil retaining pile edges and the like, and the application range of steel pipe rock-entering inclined pile construction is widened. And a feasible construction scheme is provided for more similar projects.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit inclined pile construction, in particular to a drilling rig suitable for site high-restricted inclined pile construction and an inclined pile construction method. Background Art

[0002] In urban construction, foundation pit support is a critical component for ensuring safety. As an effective form of internal support, steel pipe rock-mounted inclined piles have attracted considerable attention due to their reasonable force distribution and excellent stability. However, in sites with limited space (such as those near existing buildings, walls, underground facilities, or retaining pile edges), the use of conventional drilling rigs for steel pipe rock-mounted inclined pile construction presents significant challenges.

[0003] Specifically, because conventional steel pipe inclined pile drilling rigs are typically approximately 7 meters long and 2.2 meters wide, current drilling rigs require at least 7 meters of clearance for inclined pile drilling. However, to meet the load-bearing requirements of the foundation pit support, the inclined pile holes must be located as close as possible to the crown or waist beams at the edge of the foundation pit (ideally within 4 meters). This creates a critical contradiction: in confined sites (for example, with only approximately 3.5 meters of available space), existing drilling rigs are unable to complete the inclined pile drilling operation close to the intended crown or waist beams due to their size and operating space requirements. These spatial limitations preclude the use of efficient internal support methods such as steel pipe inclined piles, forcing the project to opt for other support solutions that are more costly, time-consuming, or less stable (such as using large amounts of concrete and rebar for internal support or using external anchors). Summary of the Invention

[0004] In view of this, the present invention proposes a drilling rig and a method for inclined pile construction suitable for high-restricted inclined pile construction on site, with the aim of realizing inclined pile construction in a foundation pit when space is limited.

[0005] The solution provided in the first aspect of the present invention includes: A drilling rig suitable for high-limit inclined pile construction on sites, the drilling rig comprising a base assembly, a traveling mechanism, a drilling mechanism, and hydraulic legs; It also includes cantilevered steel beams, rotating mechanisms, towers, and tilt adjustment mechanisms; The cantilever steel beam is arranged on the front side of the base assembly; The rotating mechanism includes a rotating seat rotatably arranged on the cantilevered 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 axis, and the drilling mechanism is arranged on the tower; The tilt angle adjustment mechanism is used to drive the tower to rotate in the pitch direction relative to the rotating base.

[0006] As a further optional solution, the rotation center line of the rotating seat is eccentrically arranged in a direction away from the bottom end of the tower relative to the center line of the base assembly in the width direction.

[0007] As a further optional solution, the tower includes a first tower and a second tower, the first tower is hinged to the rotating seat around a horizontal rotation axis, the second tower is slidably set on the first tower, and the drilling mechanism is slidably set 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.

[0008] As a further optional solution, the rotating mechanism further includes a fixed seat provided on the cantilevered steel beam and a transmission gear ring provided at the bottom of the rotating seat; The fixing seat is provided with a limiting outer ring; The transmission gear ring is an inner gear ring structure, and the transmission gear ring is coaxially arranged with the limiting outer ring; The first driving assembly includes a transmission gear and a hydraulic motor for driving the transmission gear to rotate, and the transmission gear is meshed with the transmission ring gear.

[0009] As a further optional solution, the fixed seat also includes a top plate, a bottom plate and a multi-layer support cylinder arranged between the two, the limiting outer ring is arranged at the top of the top plate, and a central support block is also provided at the top center of the top plate; the outer side of the support cylinder is provided with multiple steel vertical plates distributed along the circumferential direction.

[0010] As a further optional solution, the clearance height of the cantilevered steel beam from the ground is not less than 150 mm, but the cantilevered steel beam is sunken at least 100 mm relative to the base assembly.

[0011] As a further optional solution, the tilt adjustment mechanism adopts an oil cylinder, one end of which is hinged to the rotating seat and the other end is hinged to the tower.

[0012] As a further optional solution, the lower end of the tower is provided with a telescopic leg, and the bottom of the telescopic leg is provided with a tooth.

[0013] As a further optional solution, the cantilevered steel beam is provided with auxiliary hydraulic legs.

[0014] The solution provided in the second aspect of the present invention includes: A method for constructing inclined piles, using any of the drilling rigs mentioned above; The drilling rig moves to the location to be constructed; The tower is lifted by using the tilt adjustment mechanism; The tower is rotated by using a rotating mechanism so that the tower is arranged in the width direction of the base assembly instead of the length direction of the base assembly; Adjust the inclination of the tower and perform drilling operations.

[0015] Compared with the prior art, the drilling rig and inclined pile construction method applicable to high-limit inclined pile construction on sites of the present application have at least the following beneficial effects: The drilling rig of the present application can realize the rotation of the tower and the drilling mechanism, and switch the working direction from the length direction to the width direction under the condition that the base assembly remains fixed; even if the working space cannot meet the overall length of the drilling rig, as long as it can meet the overall width of the drilling rig, the space constraint can be broken through by changing the direction of the tower and the drilling mechanism, and it can better adapt to the construction environment with a large number of sites with limited space such as those close to existing buildings, walls, underground facilities or retaining pile edges, expand the application scope of steel pipe rock inclined pile construction, and provide a feasible construction plan for more similar projects, avoiding being forced to adopt secondary options such as concrete internal support or external anchor rods due to insufficient space, and ensuring the rationality of force and engineering economy of the inclined pile support. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a drilling rig suitable for use in high-limit inclined pile construction on sites according to an embodiment of the present invention (the tower is arranged along the entire length of the drilling rig); Figure 2 This is a schematic diagram of a drilling rig suitable for use in high-limit inclined pile construction on sites according to an embodiment of the present invention (the tower is arranged along the width of the entire drilling rig); Figure 3 This is a schematic diagram of a construction state of a drilling rig suitable for high-limit inclined pile construction on a site according to an embodiment of the present invention; Figure 4 1 is a schematic diagram of the transmission structure of the rotating mechanism in an embodiment of the present invention; Figure 5 is a schematic cross-sectional view of a rotating mechanism according to an embodiment of the present invention; Figure 6 This is a structural diagram of the supporting cylinder and the steel vertical plate in an embodiment of the present invention; Figure 7 Schematic diagram showing that the tower of the drilling rig according to the embodiment of the present invention cannot correspond to the piling position even after being arranged along the width direction of the entire drilling rig; Figure 8 is Figure 7 Schematic diagram of excavation on the basis of the first step.

[0017] In the figure: 1. Base assembly; 2. Traveling mechanism; 3. Drilling mechanism; 4. Hydraulic outriggers; 5. Cantilever steel beam; 51. Auxiliary hydraulic outriggers; 6. Rotating mechanism; 61. Rotating seat; 611. Transmission ring gear; 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. Center support block; 636. Steel vertical plate; 7. Tower; 71. First tower; 711. First hydraulic cylinder; 72. Second tower; 721. Second hydraulic cylinder; 8. Tilt adjustment mechanism; 9. Telescopic legs. DETAILED DESCRIPTION

[0018] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0021] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0022] refer to Figure 1-8An embodiment of the present invention shows a drilling rig suitable for the construction of inclined piles with high restrictions on sites, the drilling rig including a base assembly 1, a walking mechanism 2, a drilling mechanism 3 and a hydraulic support leg 4; further including a cantilevered steel beam 5, a rotating mechanism 6, a tower 7 and an inclination adjustment mechanism 8; the cantilevered steel beam 5 is arranged on the front side of the base assembly 1; the rotating mechanism 6 includes a rotating seat 61 rotatably arranged on the cantilevered steel beam 5 and a first driving assembly 62 for driving the rotating seat 61 to rotate; the tower 7 is hinged to the rotating seat 61 around a horizontal rotation axis, and the drilling mechanism 3 is arranged on the tower 7; the inclination adjustment mechanism 8 is used to drive the tower 7 to rotate in the pitch direction relative to the rotating seat 61.

[0023] When in use, the drilling rig is moved to the position to be constructed, and then the tower 7 is lifted by the tilt adjustment mechanism 8. Figure 1 Then, the tower 7 is rotated by the rotating mechanism 6, so that the tower 7 is arranged in the length direction of the base assembly 1 and becomes arranged in the width direction of the base assembly 1, as shown. Figure 2 and Figure 3 Finally, adjust the inclination of the tower 7 and perform drilling operations.

[0024] Among them, the drilling rig of this embodiment can realize the rotation of the tower 7 and the drilling mechanism 3, and switch the working direction from the length direction to the width direction under the condition that the base assembly 1 remains fixed; even if the working space cannot meet the overall length of the drilling rig, as long as it can meet the overall width of the drilling rig, the space constraint can be broken through by changing the direction of the tower 7 and the drilling mechanism 3, and it can better adapt to the construction environment of a large number of sites with limited space such as those close to existing buildings, walls, underground facilities or retaining pile edges, expand the application scope of steel pipe rock inclined pile construction, and provide a feasible construction plan for more similar projects, avoiding being forced to adopt secondary options such as concrete internal support or external anchor rods due to insufficient space, and ensuring the rationality of force and engineering economy of inclined pile support.

[0025] Among them, the base assembly 1 includes parts such as an oil tank and an electric control box, and the walking mechanism 2 can be a crawler walking mechanism 2; in this embodiment, there is no need to improve the base assembly 1, the walking mechanism 2, the drilling mechanism 3 and the hydraulic support legs 4, and the existing technology can be directly referred to.

[0026] In some embodiments, as Figure 4 As shown, the rotation centerline M of the rotating base 61 is eccentrically disposed away from the bottom end of the tower 7 relative to the centerline L in the width direction of the base assembly 1. Specifically, the centerline L in the width direction of the base assembly 1 is offset from the rotation centerline M of the rotating base 61 by 20-50 mm.

[0027] Compared to the centerline design used on existing drilling rigs, this embodiment employs an eccentric design. When tower 7 rotates 90° to the width of the vehicle body, the line of action of the drilling reaction force shifts significantly to the side of the vehicle body. This severely inadequate support arm for the conventional centrosymmetric design creates a destabilizing moment. This embodiment restructures the load transfer path by actively offsetting the rotation centerline away from the bottom end of tower 7. This offset rotation center causes the deadweight of tower 7 to generate an anti-overturning moment (the gravity moment counteracts the direction of the overturning moment). This embodiment ensures the dynamic stability of the drilling rig during lateral construction in narrow sites without increasing the vehicle's weight or enlarging the vehicle body, thus meeting the anti-overturning requirements of foundation pit safety regulations for mobile construction equipment.

[0028] In some embodiments, 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 around a horizontal axis, the second tower 72 is slidably set on the first tower 71, and the drilling mechanism 3 is slidably set 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.

[0029] 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 expansion of the drilling mechanism 3 is realized, the hole position distance is better adjusted, and the fixed working height of the traditional single tower 7 is transformed into a three-dimensional construction envelope space that can dynamically adapt to the pit depth.

[0030] In some embodiments, in order to stably realize the rotation adjustment of the tower 7, for example, it can be rotated 90 degrees to the left or right or fixed to the left or right, the inclination angle range of the tower 7 is 45 degrees to 90 degrees. Figure 4 and Figure 5 As shown, the rotating mechanism 6 also includes a fixed seat 63 arranged on the cantilever steel beam 5 and a transmission ring gear 611 arranged at the bottom of the rotating seat 61; a limiting outer ring 631 is provided on the fixed seat 63; the transmission ring gear 611 is an inner ring gear structure, and the transmission ring gear 611 and the limiting outer ring 631 are coaxially arranged; the first driving assembly 62 includes a transmission gear 621 and a hydraulic motor 622 for driving the transmission gear 621 to rotate, and the transmission gear 621 is meshed with the transmission ring gear 611.

[0031] Among them, double constraints are formed by the coaxially arranged transmission ring gear 611 and the limiting outer ring 631. The transmission ring gear 611 bears the driving torque of the hydraulic motor 622 to achieve active rotation control; the limiting outer ring 631 wraps the bottom of the rotating seat 61 to resist the lateral impact load when the drill bit enters the rock; it can avoid tooth gap jump caused by unbalanced load.

[0032] In addition, combined with Figure 6 The fixed seat 63 also includes a top plate 632, a bottom plate 633 and a multi-layer support cylinder 634 arranged between the two. The limiting outer ring 631 is arranged on the top of the top plate 632, and a central support block 635 is also provided at the top center of the top plate 632; the outer side of the support cylinder 634 is provided with multiple steel vertical plates 636 distributed along the circumferential direction.

[0033] The top plate 632, multi-layer support cylinder 634, and bottom plate 633 are stacked vertically. The top plate 632 directly bears the rotational load of the limiting outer ring 631, while the multi-layer support cylinder 634 dissipates impact energy in layers. The bottom plate 633 evenly distributes the concentrated load to the cantilevered steel beam 5. 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 forces generated by the rotating mechanism 6, while the support cylinder 634 withstands axial pressure. A central support block 635, mounted atop the top plate 632, provides a reference for the rotational axis, synergizing with the limiting outer ring 631 to constrain radial offset.

[0034] The top plate 632 , the bottom plate 633 , the support cylinder 634 , the central support block 635 and the steel vertical plate 636 are connected by welding.

[0035] In some embodiments, as Figure 1 As shown, the clearance height of the cantilevered steel beam 5 from the ground is not less than 150 mm, but the cantilevered steel beam 5 is sunken at least 100 mm relative to the base assembly 1.

[0036] Compared to existing drilling rigs, which mount the tower, drilling mechanism, and other components on the base assembly, this embodiment lowers the cantilevered steel beam 5 by at least 100 mm relative to the base assembly 1. This directly reduces the mounting base height of the rotating mechanism 6 and 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 shortens the impact load transmission path and reduces the impact of construction vibration on positioning accuracy.

[0037] In some embodiments, the tilt adjustment mechanism 8 is a cylinder, one end of which is hinged to the rotating seat 61 and the other end of which is hinged to the tower 7 .

[0038] Among them, 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 cylinder, both of which can be docked with the oil tank (hydraulic control unit) on the base assembly 1, which can facilitate the modification of existing drilling rigs.

[0039] In some embodiments, as Figure 1 and Figure 3 As shown, a telescopic leg 9 is provided at the lower end of the tower 7, and a tooth (not marked in the figure) is provided at the bottom of the telescopic leg 9.

[0040] Among them, after the tower 7 is tilted and positioned, the telescopic legs 9 are immediately extended to touch the ground, and the teeth are inserted into the soil layer to form an auxiliary support point independent of the vehicle body, directly introducing the vibration load of the tower 7 and the drilling mechanism 3 into the foundation, further improving the construction stability and anti-overturning performance.

[0041] In some embodiments, as Figure 3 and Figure 4 As shown, the cantilever steel beam 5 is provided with auxiliary hydraulic legs 51. The auxiliary hydraulic legs 51 prevent the cantilever steel beam 5 from generating end deflection and torsional deformation under lateral loads, and further improve the anti-overturning stability.

[0042] In some applications, such as Figure 7 As shown, in some cases where the space is too limited, the corresponding piling position may not be met even after the drilling rig is moved into position and the working direction is changed to the width direction; Figure 8 As shown, the soil can be excavated first, and the working position can be sunk a certain distance to correspond to the piling position.

[0043] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as 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, and the inclination angle range of the tower 7 is 45°~90°.

Claims

1. A drilling rig suitable for use in high-restriction inclined pile construction on sites, comprising a base assembly, a traveling mechanism, a drilling mechanism, and hydraulic legs, characterized in that: It also includes cantilevered steel beams, rotating mechanisms, towers, and tilt adjustment mechanisms; The cantilever steel beam is arranged on the front side of the base assembly; The rotating mechanism includes a rotating seat rotatably arranged on the cantilevered 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 axis, and the drilling mechanism is arranged on the tower; The tilt angle adjustment mechanism is used to drive the tower to rotate in the pitch direction relative to the rotating base.

2. The drilling rig suitable for high-limit inclined pile construction on a site according to claim 1, characterized in that: The rotation center line of the rotating seat is eccentrically arranged in a direction away from the bottom end of the tower relative to the center line of the base assembly in the width direction.

3. The drilling rig suitable for high-limit inclined pile construction on a site according to claim 1, characterized in that: The tower includes a first tower and a second tower, the first tower is hinged to the rotating seat around a horizontal rotation axis, the second tower is slidably set on the first tower, and the drilling mechanism is slidably set 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.

4. The drilling rig suitable for high-limit inclined pile construction on a site according to claim 2, characterized in that: The rotating mechanism further includes a fixed seat provided on the cantilevered steel beam and a transmission gear ring provided at the bottom of the rotating seat; The fixing seat is provided with a limiting outer ring; The transmission gear ring is an inner gear ring structure, and the transmission gear ring is coaxially arranged with the limiting outer ring; The first driving assembly includes a transmission gear and a hydraulic motor for driving the transmission gear to rotate, and the transmission gear is meshed with the transmission ring gear.

5. The drilling rig suitable for high-limit inclined pile construction on site according to claim 4, characterized in that: The fixing seat also includes a top plate, a bottom plate and a multi-layer support cylinder arranged between the two. The limiting outer ring is arranged on the top of the top plate, and a central support block is also provided at the top center of the top plate; the outer side of the support cylinder is provided with multiple steel vertical plates distributed along the circumferential direction.

6. The drilling rig suitable for high-limit inclined pile construction on a site according to claim 1, characterized in that: The clearance height of the cantilevered steel beam from the ground is not less than 150 mm, but the cantilevered steel beam is sunken at least 100 mm relative to the base assembly.

7. The drilling rig suitable for high-limit inclined pile construction on a site according to claim 1, characterized in that: The tilt adjustment mechanism adopts an oil cylinder, one end of which is hinged to the rotating seat, and the other end is hinged to the tower.

8. The drilling rig suitable for high-limit inclined pile construction on a site according to claim 1, characterized in that: The lower end of the tower is provided with a telescopic support leg, and the bottom of the telescopic support leg is provided with a tooth.

9. The drilling rig suitable for high-limit inclined pile construction on a site according to claim 1, characterized in that: Auxiliary hydraulic support legs are provided on the cantilever steel beam.

10. A method for constructing inclined piles, characterized in that: The construction is carried out using any one of the drilling rigs in claims 1 to 9; The drilling rig moves to the location to be constructed; The tower is lifted by using the tilt adjustment mechanism; The tower is rotated by using a rotating mechanism so that the tower is arranged in the width direction of the base assembly instead of the length direction of the base assembly; Adjust the inclination of the tower and perform drilling operations.

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