A tunnel advanced horizontal jet grouting pile drill rod auxiliary structure for aeolian sand strata

Abstract

The present application provides a tunnel advanced horizontal rotary jet pile drill rod auxiliary structure for aeolian sand strata, comprising a fixed seat formed on the outer periphery of the drill rod, a blocking device hinged on the fixed seat, a locking device arranged on a slide rail, and a blocking cloth connected between two adjacent blocking devices; the blocking device comprises a plurality of mutually nested blocking sub-bodies; the locking device comprises a swing rod, a locking rod, and a locking spring. The tunnel advanced horizontal rotary jet pile drill rod auxiliary structure for aeolian sand strata provided by the present invention, when the drill bit is grouting, the drill rod rotates and moves toward the outside of the borehole, the roller is moved by friction with the side wall of the borehole, the locking rod is compressed by the swing rod and the moving rod, so that the clearance groove reaches the position corresponding to the blocking block, the blocking block rotates into the clearance groove, so that the blocking sub-bodies can slide in the slide rail, and under the action of the elastic member, each blocking sub-bodies is opened, the blocking cloth is opened into an umbrella shape, and withstands a large force, reducing the loss of grouting material.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel support, in particular to an auxiliary structure for a tunnel advanced horizontal jet grouting pile drill rod in aeolian sand strata. Background Art

[0002] Aeolian sand formations require advance support, which is generally achieved by using horizontal jet grouting piles. The drill rod drives the horizontal grouting drill bit to drill into the soil layer to a specified depth. The drill rod and the horizontal grouting drill bit slowly rotate outward while spraying slurry to mix and solidify with the soil to form a cylinder of a certain strength for reinforcement. In order to prevent the slurry from being lost in large quantities in a horizontal state when the drill rod moves outward, an advance horizontal jet grouting pile drill rod auxiliary structure for tunnels in aeolian sand formations is urgently needed. Summary of the invention

[0003] The embodiment of the present invention provides a tunnel advanced horizontal jet grouting pile drill rod auxiliary structure for aeolian sand strata, which solves the problem that slurry is easily lost during horizontal drilling and grouting of existing horizontal jet grouting piles.

[0004] In order to overcome the above technical problems, according to an embodiment of the present invention, a tunnel advanced horizontal jet grouting pile drill rod auxiliary structure in aeolian sand strata is provided, comprising:

[0005] A fixing seat formed on the outer periphery of the drill rod; the fixing seats are multiple in number and are evenly spaced along the circumferential direction on the outer periphery of the drill rod; each fixing seat is provided with a slide rail, the slide rail is arc-shaped, and the multiple slide rails diverge outward in a centrally symmetrical state with the axis of the drill rod as the center, and the vertical distance between the top of the slide rail and the axis of the drill rod is smaller than the vertical distance between the outermost edge of the drill bit and the axis of the drill rod;

[0006] A blocking device hinged on the fixed seat; the blocking device comprises a plurality of mutually nested blocking sub-bodies, one end of each blocking sub-bodies is arranged on the corresponding slide rail, and the other end is hinged at the center of the circle corresponding to the slide rail on the fixed seat; a connecting device is arranged between two adjacent blocking sub-bodies, and an elastic member is connected between the uppermost blocking sub-bodies and the top of the slide rail;

[0007] A locking device is arranged on the slide rail; the locking device is arranged on the side of the slide rail, and the locking device includes a swing rod, a locking rod and a locking spring; the swing rod is hinged at the top of the slide rail, and the upper side length of the swing rod is 3-5 times the lower side length with the hinge point as the boundary; the shape of the locking rod matches the slide rail, and the locking rod is slidably arranged on the slide rail; the locking spring is arranged under the slide rail to provide an upward elastic force for the locking rod; the lower end of the swing rod can be driven to move the locking rod downward to realize the locking and releasing states of the locking rod; a through hole is provided on the side of the slide rail that cooperates with the locking device, and a blocking block is hinged on the side wall of the through hole, and a clearance groove is provided on the locking rod, and the blocking block can be flipped into the clearance groove after the locking rod moves downward; and

[0008] A blocking cloth connected between two adjacent blocking devices.

[0009] In some embodiments, a spherical rotating body is formed on the swing rod, and two hinge blocks are arranged opposite to each other above the slide rail. The opposite side of the hinge block is provided with a hinge groove matching the rotating body; the lower end of the swing rod is connected to a moving rod through a hinge, and swing holes are provided on both sides of the slide rail, and the two ends of the moving rod pass through the swing holes respectively.

[0010] In some embodiments, the top end of the locking rod has a groove, and one of the ends of the moving rod is located in the groove.

[0011] In some embodiments, the blocking block is wedge-shaped.

[0012] In some embodiments, the blocking device includes at least three blocking parts.

[0013] In some embodiments, the blocking cloth is canvas.

[0014] In some embodiments, a roller is disposed at the top end of the swing rod, and an extension is disposed at the periphery of the roller.

[0015] In some embodiments, the extension body is a linear structure made of rubber, plastic or cloth.

[0016] In some embodiments, multiple blocking segments on the same blocking device are all connected to the blocking cloth, and blocking segments of the same order on different blocking devices are connected on the same radius on the blocking cloth.

[0017] In some embodiments, the elastic member is arranged along the interior of the slide rail.

[0018] The technical solution provided by the embodiments of the present invention may have the following beneficial effects:

[0019] The tunnel advanced horizontal rotary jet pile drill rod auxiliary structure for aeolian sand strata provided by the present invention compresses the blocking device into the fixed seat during horizontal drilling without affecting the drilling of the drill bit. When grouting is performed at the drill bit, the drill rod rotates and moves to the outside of the borehole. The roller is moved by friction with the side wall of the borehole. The locking rod is compressed by the swing rod and the moving rod, so that the clearance groove reaches the position corresponding to the blocking block. The blocking block rotates into the clearance groove, so that the blocking split body can slide in the slide rail. Under the action of the elastic member, each blocking split body is opened, and the blocking cloth is opened into an umbrella shape, which can withstand a large force and reduce the loss of grouting material.

[0020] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] Figure 1 It is a schematic diagram of the tunnel advance horizontal jet grouting piles in aeolian sand strata.

[0023] Figure 2 It is a schematic diagram of the initial structure of a blocking device of a tunnel advance horizontal jet jet pile drill rod auxiliary structure in aeolian sand stratum according to an exemplary embodiment.

[0024] Figure 3 This is a schematic diagram of the side of the slide rail.

[0025] Figure 4 It is a schematic diagram of the cross section of the upper end of the slide rail.

[0026] Figure 5 It is a schematic diagram of the structure after the blocking device of the auxiliary structure of the drilling rod of the tunnel advance horizontal jet jet pile in the aeolian sand stratum is opened according to an exemplary embodiment.

[0027] In the figure, 1, drill rod; 2, fixed seat; 3, slide rail; 4, drill bit;

[0028] 5. Blocking device; 501. Blocking split body; 502. Connecting device; 503. Elastic member; 504. Blocking cloth;

[0029] 6. Locking device; 601. Swing rod; 602. Locking rod; 603. Locking spring; 604. Through hole; 605. Blocking block; 606. Give way groove; 607. Articulated member; 608. Rotating body; 609. Articulated block; 610. Articulated groove; 611. Moving rod; 612. Swing hole; 613. Groove; 614. Roller; 615. Extension body. DETAILED DESCRIPTION

[0030] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present application; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside", etc. appear to indicate the orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, which is 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. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 2-5As shown, the present invention provides a tunnel advanced horizontal rotary jet pile drilling rod auxiliary structure for aeolian sand strata, and some specific embodiments are described below. One of the tunnel advanced horizontal rotary jet pile drilling rod auxiliary structures for aeolian sand strata is provided, comprising a fixing seat 2 formed on the outer periphery of the drill rod 1 and a blocking device 5 hinged on the fixing seat 2. More specifically, there are multiple fixing seats 2, which are formed on the outer periphery of the drill rod 1 at even intervals along the circumferential direction, forming a circle around the outer periphery of the drill rod 1. A slide rail 3 is welded on each fixing seat 2, and the slide rail 3 is arc-shaped. The multiple slide rails 3 diverge outward in a centrally symmetrical state with the axis of the drill rod 1 as the center, and the center of the slide rail 3 faces the direction of the drill bit 4, that is, a circle of slide rails 3 bent toward the direction of the drill bit 4 is formed on the outer periphery of the drill rod 1. The vertical distance between the top of the slide rail 3 and the axis of the drill rod 1 is smaller than the vertical distance between the outermost edge of the drill bit 4 and the axis of the drill rod 1, so that the diameter of the hole drilled by the drill bit 4 is larger than the rotation diameter of the slide rail 3, preventing the slide rail 3 from damaging the drill hole. Moreover, in some specific embodiments, the blocking device 5 on the fixed seat 2 includes three mutually nested blocking sub-bodies 501, one end of the blocking sub-bodies 501 is mounted on the corresponding slide rail 3, and the other end is hinged at the center of the circle corresponding to the slide rail 3 on the fixed seat 2, so that one end of the blocking sub-bodies 501 on the slide rail 3 can slide along the arc of the slide rail 3. A connecting device 502 is installed between two adjacent blocking sub-bodies 501, and the connecting device 502 can be a connecting wire or the like. An elastic member 503 is connected between the uppermost blocking split 501 and the top of the slide rail 3, and the elastic member 503 is arranged inside the slide rail 3. When the blocking block 605 on the slide rail 3 releases the obstruction to the blocking split 501, the uppermost blocking split 501 moves upward under the pulling force of the elastic member 503. When the uppermost blocking split 501 moves upward, the second blocking split 501 is pulled by the connecting device 502, and so on, until the uppermost blocking split 501 reaches the uppermost position that can be pulled by the elastic member 503.

[0034] In order to switch between the blocking and releasing states of the blocking split body 501 on the slide rail 3, in some embodiments, a locking device 6 is installed on the slide rail 3. Specifically, the locking device 6 is installed on the side of the slide rail 3, and the locking device 6 includes a swing rod 601, a locking rod 602, and a locking spring 603. The swing rod 601 is hinged at the top of the slide rail 3, and the upper side length of the swing rod 601 is 3-5 times the lower side length with the hinge point as the boundary. Specifically, the articulation method is that a spherical rotating body 608 is formed on the swinging rod 601, two articulation blocks 609 are arranged opposite to each other above the slide rail 3, and an articulation groove 610 matching the rotating body 608 is provided on the opposite side of the articulation block 609; the lower end of the swinging rod 601 is connected to the moving rod 611 through the hinge 607, and swing holes 612 are provided on both sides of the slide rail 3, and the two ends of the moving rod 611 pass through the swing holes 612 respectively. When the drill rod 1 rotates backward and withdraws from the drill hole, the swinging rod 601 moves toward the drill bit 4, thereby driving the moving rod 611 to move away from the drill bit 4, and then pushing the locking rod 602. The shape of the locking rod 602 matches the slide rail 3, and the locking rod 602 is slidably installed on the side of the slide rail 3. When the top end of the locking rod 602 is pushed by the swinging rod 601, the locking rod 602 will move downward along the slide rail 3. The locking spring 603 is installed below the slide rail 3 to provide an upward elastic force for the locking rod 602, so that the locking rod 602 is kept in the upper state under normal conditions. The locking rod 602 will only move downward when the swing rod 601 drives the moving rod 611 to press the locking rod 602 downward. The top of the locking rod 602 has a groove 613, and the end of the moving rod 611 is located in the groove 613, which is convenient for the moving rod 611 to press the locking rod 602. The lower end of the swing rod 601 can be driven to move downward on the locking rod 602 to achieve the two states of locking and releasing the locking rod 602. Specifically, the way to switch between the locked and released states is that the side of the slide rail 3 that cooperates with the locking device 6 is provided with a through hole 604, and a blocking block 605 is hinged on the side wall of the through hole 604. The blocking block 605 is wedge-shaped. The blocking block 605 goes deep into the inside of the slide rail 3 under normal conditions, and the blocking split 501 is blocked by the blocking block 605 so that it cannot be pulled up by the elastic member 503, thereby achieving the locked state. The locking rod 602 is provided with a clearance groove 606. After the locking rod 602 moves downward, the blocking block 605 can be flipped into the clearance groove 606. There is no blocking block 605 in the slide rail 3, so that the blocking split body 501 can be pulled up by the elastic member 503 to achieve the released state.

[0035] A blocking cloth 504 is connected between the blocking devices 5 of two adjacent fixed seats 2 in the circumferential direction of the drill rod 1. The blocking cloth 504 is made of canvas. When the drill rod 1 rotates and withdraws backward, the swing rod 601 moves toward the drill bit 4, driving the moving rod 611 to press against the locking rod 602, so that the blocking devices 5 on each fixed seat 2 are unfolded along the slide rail 3, forming an umbrella-like structure facing the drill bit 4, which can withstand greater force from the drill bit 4, temporarily block the borehole, and reduce the loss of slurry. The three blocking segments 501 on the same blocking device 5 are all connected to the blocking cloth 504, and the blocking segments 501 of the same order on different blocking devices 5 are connected on the same radius on the blocking cloth 504, so that the umbrella-like structure is more evenly stressed after opening.

[0036] In order to make the swing rod 601 more easily deflected under the friction of the hole wall, a roller 614 is installed on the top of the swing rod 601. When the swing rod 601 is not deflected, the vertical distance from the outer edge of the roller 614 to the axis of the drill rod 1 is equal to the vertical distance from the outer edge of the drill bit 4 to the axis of the drill rod 1. An extension 615 is installed on the periphery of the roller 614. The extension 615 adopts a linear structure made of rubber, plastic or cloth, so that the extension 615 is flexible and will not damage the drill hole when the drill rod 1 moves forward. When the drill rod 1 moves backward, the roller 614 moves under the friction of the hole wall to increase the friction between the roller 614 and the hole wall.

[0037] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The description and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0038] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A tunnel advanced horizontal jet grouting pile drill rod auxiliary structure in aeolian sand strata, characterized in that: include: A fixing seat (2) formed on the outer periphery of a drill rod (1); the fixing seats (2) are multiple in number and are evenly spaced along the circumferential direction on the outer periphery of the drill rod (1); each fixing seat (2) is provided with a slide rail (3), the slide rail (3) is arc-shaped, the multiple slide rails (3) diverge outward in a centrally symmetrical state with the axis of the drill rod (1) as the center, and the vertical distance between the top end of the slide rail (3) and the axis of the drill rod (1) is smaller than the vertical distance between the outermost edge of the drill bit (4) and the axis of the drill rod (1); A blocking device (5) hinged on the fixing seat (2); the blocking device (5) comprises a plurality of mutually nested blocking sub-bodies (501), one end of each blocking sub-bodies (501) being arranged on the corresponding slide rail (3), and the other end being hinged at the center of a circle corresponding to the slide rail (3) on the fixing seat (2); a connecting device (502) being arranged between two adjacent blocking sub-bodies (501), and an elastic member (503) being connected between the uppermost blocking sub-bodies (501) and the top end of the slide rail (3); A locking device (6) is arranged on the slide rail (3); the locking device (6) is arranged on the side of the slide rail (3), and the locking device (6) comprises a swing rod (601), a locking rod (602) and a locking spring (603); the swing rod (601) is hinged to the top of the slide rail (3), and the length of the upper side of the swing rod (601) is 3 to 5 times the length of the lower side with the hinge point as the boundary; the shape of the locking rod (602) matches the slide rail (3), and the locking rod (602) is slidably arranged on the slide rail (3); the locking spring (603) is arranged on the slide rail (3) The lower part provides an upward elastic force for the locking rod (602); the lower end of the swing rod (601) can drive the locking rod (602) to move downward, so as to realize the locking and releasing states of the locking rod (602); a through hole (604) is provided on the side of the slide rail (3) that cooperates with the locking device (6); a blocking block (605) is hinged on the side wall of the through hole (604); a clearance groove (606) is provided on the locking rod (602); after the locking rod (602) moves downward, the blocking block (605) can be flipped into the clearance groove (606); and A blocking cloth (504) connected between two adjacent blocking devices (5).

2. The tunnel advanced horizontal jet grouting pile drill rod auxiliary structure for aeolian sand strata according to claim 1 is characterized in that: A spherical rotating body (608) is formed on the swing rod (601), and two hinge blocks (609) are arranged opposite to each other above the slide rail (3). A hinge groove (610) matching the rotating body (608) is provided on the opposite side of the hinge block (609); the lower end of the swing rod (601) is connected to a moving rod (611) via a hinge (607), and swing holes (612) are provided on both sides of the slide rail (3), and the two ends of the moving rod (611) respectively pass through the swing holes (612).

3. The tunnel advanced horizontal jet grouting pile drill rod auxiliary structure for aeolian sand strata according to claim 2 is characterized in that: The top end of the locking rod (602) has a groove (613), and one end of the moving rod (611) is located in the groove (613).

4. The tunnel advanced horizontal jet grouting pile drill rod auxiliary structure for aeolian sand strata according to claim 1 is characterized in that: The blocking block (605) is wedge-shaped.

5. The tunnel advanced horizontal jet grouting pile drill rod auxiliary structure for aeolian sand strata according to claim 1 is characterized in that: The blocking device (5) comprises at least three blocking sub-bodies (501).

6. The tunnel advanced horizontal jet grouting pile drill rod auxiliary structure for aeolian sand strata according to claim 1, characterized in that: The blocking cloth (504) is made of canvas.

7. The tunnel advanced horizontal jet grouting pile drill rod auxiliary structure for aeolian sand strata according to claim 1 is characterized in that: A roller (614) is provided at the top end of the swing rod (601), and an extension body (615) is provided at the periphery of the roller (614).

8. The tunnel advanced horizontal jet grouting pile drill rod auxiliary structure for aeolian sand strata according to claim 7, characterized in that: The extension body (615) is a linear structure made of rubber, plastic or cloth.

9. The tunnel advanced horizontal jet grouting pile drill rod auxiliary structure for aeolian sand strata according to claim 1, characterized in that: The plurality of blocking segments (501) on the same blocking device (5) are all connected to the blocking cloth (504), and the blocking segments (501) of the same order on different blocking devices (5) are connected on the blocking cloth (504) at the same radius.

10. The tunnel advanced horizontal jet grouting pile drill rod auxiliary structure for aeolian sand strata according to claim 1, characterized in that: The elastic member (503) is arranged along the interior of the slide rail (3).

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