Clamp device for clamping inclined steel pipe core pile

Abstract

The utility model relates to a clamp device used for clamping an inclined steel pipe core pile, and belongs to the field of foundation pit supporting of civil construction, the clamp device comprises a pile machine chassis and a guide frame which is installed on the pile machine chassis and used for allowing the inclined steel pipe core pile to slide, and the position, close to the bottom end, of the guide frame is provided with a clamping mechanism used for clamping a lower steel pipe core pile. The clamping mechanism comprises two clamping oil cylinders which are symmetrically arranged in the horizontal direction, piston rods of the two clamping oil cylinders are oppositely arranged, clamping plates are installed at the ends of the piston rods of the clamping oil cylinders, and clamping cambered surfaces are arranged on the sides, back to the clamping oil cylinders, of the clamping plates. The situation that the bottom end of the lower section of the steel pipe core pile slides down and sinks in the joint process of the inclined steel pipe core pile is improved.

Description

Technical Field

[0001] This application relates to the field of foundation pit support in civil engineering construction, and particularly to a fixture device for clamping inclined steel pipe core piles. Background Art

[0002] The cement-soil steel pipe inclined bracing pile has a pile structure below the bottom of the pit and a support structure above the bottom of the pit, and is formed by the synchronous and concentric construction of the cement-soil formed by high-pressure jet grouting and the inclined steel pipe core pile. Among them, the length of the inclined steel pipe core pile is relatively long and is formed by connecting multiple steel pipe units through joints. In the related art, when constructing the joint of the inclined steel pipe core pile, a steel wire rope is used to tie the top end of the lower steel pipe core pile, and the other end of the steel wire rope is anchored on the guide frame to prevent the lower steel pipe core pile from sliding and subsiding. However, since the steel wire rope is tied to the top end of the lower steel pipe core pile in a hinged manner, the bottom end of the lower steel pipe core pile will subside in the freshly constructed liquid cement-soil, thereby affecting the concentricity of the cement-soil and the lower steel pipe core pile, that is, affecting the bearing capacity of the composite inclined bracing pile. Utility Model Content

[0003] In order to improve the situation where the bottom end of the lower steel pipe core pile slides and subsides during the joint construction of the inclined steel pipe core pile, this application provides a fixture device for clamping the inclined steel pipe core pile.

[0004] A fixture device for clamping an inclined steel pipe core pile provided by this application adopts the following technical solutions:

[0005] A fixture device for clamping an inclined steel pipe core pile includes a pile driver chassis and a guide frame installed on the pile driver chassis and used for the inclined steel pipe core pile to slide. The guide frame is provided with a clamping mechanism for clamping the lower steel pipe core pile near the bottom end. The clamping mechanism includes two clamping cylinders symmetrically arranged in the horizontal direction, the piston rods of the two clamping cylinders are arranged towards each other, a clamping plate is installed at the end of the piston rod of the clamping cylinder, and the clamping plate has a clamping arc surface on the side facing away from the clamping cylinder.

[0006] By adopting the above technical solutions, when joint construction of the inclined steel pipe core pile is required, the top end of the lower steel pipe core pile can be clamped by the clamping mechanism. The clamping plates of a pair of clamping cylinders in the clamping mechanism clamp on both sides of the lower steel pipe core pile, so that the top end of the lower steel pipe core pile is clamped and fixed to form a fixed end, thereby greatly reducing the probability of the bottom end of the lower steel pipe core pile subsiding in the freshly constructed liquid cement-soil and helping to ensure the concentricity of the cement-soil and the lower steel pipe core pile. The setting of the clamping arc surface on the clamping plate makes the contact area between the clamping plate and the surface of the lower steel pipe core pile ideal, which helps to ensure the clamping effect of the clamping mechanism on the lower steel pipe core pile.

[0007] Optionally, a rubber gasket is provided at the clamping arc surface of the clamping plate.

[0008] By adopting the above technical solution, when the clamping mechanism clamps the lower steel pipe core pile, the clamping oil cylinder drives the clamping plate to abut against the outer surface of the lower steel pipe core pile. After the rubber gasket bears pressure, it deforms and fits against the outer surface of the lower steel pipe core pile, making the bonding degree between the clamping plate and the lower steel pipe core pile in an ideal state, which helps to improve the clamping effect of the clamping structure on the lower steel pipe core pile.

[0009] Optionally, the guide frame is provided with a guide chute for the inclined steel pipe core pile to slide downward.

[0010] By adopting the above technical solution, the setting of the guide chute can limit the sliding of the inclined steel pipe core pile, reduce the probability of large deflection of the inclined steel pipe core pile during the downward sliding process, and at the same time facilitate the hoisting device to hoist and place the upper steel pipe unit on the guide frame, so that the upper steel pipe unit can be arranged along the length direction of the guide frame, thereby aligning the axis of the upper steel pipe unit better with the axis of the lower steel pipe core pile.

[0011] Optionally, a plurality of support pads are arranged at intervals along the length direction of the bottom surface of the guide chute of the guide frame.

[0012] By adopting the above technical solution, there is a certain gap between the lower steel pipe core pile supported by the support pads, the upper steel pipe unit and the bottom surface of the guide chute, which facilitates the steel pipe joint to be sleeved on the outer surfaces of the lower steel pipe core pile and the upper steel pipe unit.

[0013] Optionally, the support pad is provided with an arc groove for arranging the steel pipe unit.

[0014] By adopting the above technical solution, the design of the arc groove on the support pad helps to guide the lower steel pipe core pile and the upper steel pipe unit, making the concentricity stability of the sliding of the lower steel pipe core pile and the upper steel pipe unit ideal.

[0015] Optionally, the support pad includes an upper support pad located on the upstream side of the clamping mechanism and a lower support pad located on the downstream side of the clamping mechanism; the lower support pad is provided with a guide inclined surface on the side facing the clamping mechanism.

[0016] By adopting the above technical solution, since the outer diameter of the steel pipe joint is larger than the outer diameter of the inclined steel pipe core pile, a guide inclined surface is provided on the lower support pad, so that the steel pipe joint can slide smoothly to the upper side of the lower support pad, which helps the inclined steel pipe core pile with the joint to complete the sliding on the guide frame.

[0017] Optionally, the guide frame is provided with a support groove on the bottom surface of the guide chute for the lower support pad to slide, and a support spring for supporting the lower support pad is arranged in the support groove.

[0018] By adopting the above technical solution, since the outer diameter of the steel pipe joint is larger than that of the inclined steel pipe core pile, when the steel pipe joint moves onto the lower support pad, the lower support pad will move downward and compress the support spring, reducing the probability of the entire inclined steel pipe core pile shaking.

[0019] Optionally, the number of the lower support pads is not less than two.

[0020] By adopting the above technical solution, the number of the lower support pads is limited, which helps to ensure the support effect of the guide frame on the lower section of the steel pipe core pile.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. A fixture device for clamping an inclined steel pipe core pile. By arranging a clamping mechanism on the guide frame, the lower section of the steel pipe core pile can be clamped, greatly reducing the probability of the bottom end of the lower section of the steel pipe core pile sinking in the freshly constructed liquid cement soil, which helps to ensure the concentricity of the cement soil and the lower section of the steel pipe core pile;

[0023] 2. By arranging support pads in the guide chute of the guide frame, there is a gap between the lower section of the steel pipe core pile, the upper section of the steel pipe unit and the bottom surface of the guide chute, facilitating the installation of the steel pipe joint;

[0024] 3. By arranging a support groove and a support spring on the guide frame, when the steel pipe joint moves onto the lower support pad, the lower support pad will compress the support spring, reducing the probability of the entire inclined steel pipe core pile shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the fixture device for clamping an inclined steel pipe core pile in Embodiment 1.

[0026] Figure 2 is a schematic cross-sectional view of the fixture device for clamping an inclined steel pipe core pile at the clamping mechanism in Embodiment 1.

[0027] Figure 3 is a schematic cross-sectional view of the guide frame in Embodiment 1.

[0028] Figure 4 is a schematic diagram of the upper support pad in Embodiment 1.

[0029] Figure 5 is Figure 3 a partial enlarged schematic view at A in

[0030] Figure 6 It is a schematic cross-sectional view of the cooperation between the lower support cushion block and the guide frame in Embodiment 2.

[0031] Description of the reference numerals: 1, pile driver chassis; 11, installation through hole; 12, hinge seat; 2, guide frame; 21, hinge head; 22, guide chute; 23, limit side plate; 24, installation bracket; 241, connecting plate; 242, installation flange; 25, support groove; 26, arrangement groove; 27, arrangement cover; 271, arrangement through hole; 28, lower support pillar; 3, inclination adjustment hydraulic cylinder; 4, pile pressing device; 5, driving power head; 6, clamping cylinder; 61, clamping plate; 611, clamping arc surface; 612, rubber gasket; 62, cylinder flange; 63, installation screw; 71, upper support cushion block; 72, lower support cushion block; 721, sliding part; 722, support part; 723, upper support pillar; 73, arc groove; 74, guide inclined surface; 8, support spring. Detailed implementation manners

[0032] The following further elaborates on this application Figures 1-6 in conjunction with the appended drawings.

[0033] The embodiment of this application discloses a fixture device for clamping an inclined steel pipe core pile.

[0034] Embodiment 1

[0035] Referring to Figure 1 , a fixture device for clamping an inclined steel pipe core pile includes a pile driver chassis 1, a guide frame 2 hinged at the bottom to the pile driver chassis 1, and a hydraulic driving frame for driving the guide frame 2 to rotate.

[0036] Referring to Figure 1 , the pile driver chassis 1 has an installation through hole 11 penetrating the upper and lower surfaces, and the installation through hole 11 is for the inclined steel pipe pile core to pass through. On one side of the installation through hole 11 at the top of the pile foundation chassis, a hinge seat 12 is provided, and at the bottom of the guide frame 2, there is a hinge head 21 that cooperates with the hinge seat 12. After the guide frame 2 is installed on the pile foundation chassis, it can swing up and down, and the swing axis of the guide frame 2 is in the horizontal direction. The hydraulic driving frame is an inclination adjustment hydraulic cylinder 3. The bottom of the inclination adjustment hydraulic cylinder 3 is hinged to the top of the pile foundation chassis, and the piston rod of the inclination adjustment hydraulic cylinder 3 extends upward and is hinged to the bottom of the guide frame 2, so that the angle of the guide frame 2 can be adjusted through the inclination adjustment hydraulic cylinder 3, thereby adjusting the output angle of the inclined steel pipe pile core. Among them, at the top end of the guide frame 2, a pile pressing device 4 for clamping the steel pipe unit and a driving power head 5 for driving the drill pipe to rotate are also installed.

[0037] Referring to Figure 1 and Figure 2, a guiding chute 22 for the axial sliding of the inclined steel pipe pile core is provided on the upper side of the guiding frame 2, that is, limiting side plates 23 are provided on both sides of the guiding frame 2. When using a hoisting device to hoist and place the upper steel pipe unit into the guiding chute 22 of the guiding frame 2, the limiting side plates 23 can limit the back-and-forth swinging of the upper steel pipe unit, so as to facilitate the arrangement of the upper steel pipe unit along the length direction of the guiding frame 2.

[0038] Refer to Figure 1 and Figure 2 , a clamping mechanism for clamping the lower steel pipe core pile is provided at the position of the guiding frame 2 close to the bottom end. Installation brackets 24 for installing the clamping mechanism are oppositely arranged on both sides of the guiding frame 2. The installation bracket 24 includes a connecting plate 241 welded and fixed on the guiding frame 2 and an installation flange 242 welded and fixed on the connecting plate 241.

[0039] Refer to Figure 1 and Figure 2 , the clamping mechanism includes two oppositely arranged clamping cylinders 6 and clamping plates 61 installed on the piston rods of the clamping cylinders 6. The two clamping cylinders 6 and the two installation brackets 24 are arranged in one-to-one correspondence, and the clamping cylinders 6 are installed on the installation flanges 242 of the corresponding installation brackets 24. An oil cylinder flange 62 matched with the installation flange 242 is provided on the shell of the clamping cylinder 6, and the installation flange 242 and the oil cylinder flange 62 are fixedly connected by bolts. The piston rods of the two clamping cylinders 6 are coaxial and arranged towards each other.

[0040] Refer to Figure 1 and Figure 2 , the clamping plate 61 is fixed on the piston rod of the clamping cylinder 6 by installation screws 63. A counterbore for arranging the installation screws 63 is provided in the middle of the side of the clamping plate 61 facing away from the clamping cylinder 6, and a threaded hole opposite to the counterbore and matched with the installation screws 63 is provided on the end face of the piston rod of the clamping cylinder 6. Among them, the clamping plate 61 has a clamping arc surface 611 on the side facing away from the clamping cylinder 6 for adapting to the outer surface of the inclined steel pipe core pile. In order to improve the clamping effect of the above clamping mechanism, a rubber gasket 612 is provided on the clamping arc surface 611 of the clamping plate 61. The thickness of the rubber gasket 612 is consistent and it is fixed on the clamping arc surface 611 by glue, so that the side of the rubber gasket 612 away from the clamping plate 61 is also an arc surface adapted to the outer surface of the inclined steel pipe core pile.

[0041] Refer to Figure 3, a plurality of support pads are arranged at intervals along the length direction on the bottom surface of the guiding chute 22 of the guiding frame 2. The support pads are fixed on the bottom surface of the guiding chute 22 by bolts. The support pads can support the lower side of the upper steel pipe unit / the lower steel pipe core pile, so that there is a gap between the upper steel pipe unit / the lower steel pipe core pile and the bottom surface of the guiding chute 22, facilitating the sleeving of the steel pipe joint on both of them. The support pads include an upper support pad 71 on the upstream side of the clamping mechanism and a lower support pad 72 on the downstream side of the clamping mechanism. Among them, the number of the lower support pads 72 is not less than two. In this embodiment, the number of the lower support pads 72 is three.

[0042] Referring to Figure 3 and Figure 4 , both the upper support pad 71 and the lower support pad 72 are provided with arc-shaped grooves 73 for arranging the inclined steel pipe core pile.

[0043] Referring to Figure 3 and Figure 5 , in order to facilitate the steel pipe joint to pass through the upper side of the lower support pad 72, a guiding inclined surface 74 is provided on one side of the lower support pad 72 facing the clamping mechanism. When the steel pipe joint passes through the upper side of the lower support pad 72, the inclined steel pipe core pile will be slightly lifted upward. After the steel pipe joint passes through the lower support pad 72, the inclined steel pipe core pile will return to a state parallel to the guiding frame 2. Since the lifting amplitude of the inclined steel pipe core pile is small and the time is short in this process, the influence on the insertion of the inclined steel pipe core pile into the foundation is small.

[0044] Combined with Figures 1 to 5 , the implementation principle of a fixture device for clamping an inclined steel pipe core pile in an embodiment of the present application is as follows: When making a joint of the inclined steel pipe core pile, that is, when it is necessary to complete the joint of the upper steel pipe unit and the lower steel pipe core pile, first, clamp the upper end of the lower steel pipe core pile through the clamping mechanism; then, separate the pile press 4 from the top end of the lower steel pipe core pile, and drive the pile press 4 to move along the guiding frame 2 to the top end; after that, use a hoisting device to hoist the upper steel pipe unit onto the guiding frame 2, and complete the docking of the upper steel pipe unit and the pile press 4; then, complete the joint of the upper steel pipe unit and the lower steel pipe core pile, and loosen the clamping mechanism. The above-mentioned fixture device for clamping an inclined steel pipe core pile can clamp the top end of the lower steel pipe core pile during the joint process, so that the bottom end of the lower steel pipe core pile is not easy to sink in the freshly constructed liquid cement soil.

[0045] Embodiment 2

[0046] The fixture device for clamping an inclined steel pipe core pile in this embodiment is the same as that in Embodiment 1 in all other structures except that the installation structure of the lower support pad 72 on the guiding frame 2 is different from that in Embodiment 1.

[0047] Referring to Figure 6, a support groove 25 is formed on the bottom surface of the guiding chute 22 of the guiding frame 2. A layout groove 26 is further provided along the upper edge of the support groove 25 on the bottom surface of the guiding chute 22. A layout cover 27 is installed in the layout groove 26 of the guiding frame 2, and a layout through hole 271 penetrating the upper and lower surfaces of the layout cover 27 is formed in the middle of the layout cover 27. Among them, the layout cover 27 is fixed in the layout groove 26 by screws. The lower support pad 72 includes a sliding portion 721 slidably installed in the support groove 25 and a support portion 722 connected to the sliding portion 721 and extending out through the layout through hole 271. Among them, the size of the sliding portion 721 is larger than the size of the layout through hole 271 so that the sliding portion 721 is restricted by the layout cover of the layout groove 26, and an arc groove 73 and a guiding inclined surface 74 are provided on the support portion 722.

[0048] Referring to Figure 6 , a support spring 8 supporting the bottom surface of the sliding portion 721 is further provided in the support groove 25 of the guiding frame 2. Under the action of the support spring 8, the sliding portion 721 always has a tendency to fit against the bottom surface of the layout cover 27. In this embodiment, two support springs 8 are provided in the support groove 25 and are symmetrically arranged on the left and right in the layout groove 26.

[0049] Referring to Figure 6 , in order to improve the stability of the support spring 8, a lower support pillar 28 inserted into the lower end of the support spring 8 is provided on the bottom surface of the support groove 25, and an upper support pillar 723 inserted into the upper end of the support spring 8 is provided on the bottom surface of the sliding portion 721. And when the sliding portion 721 fits against the bottom surface of the layout cover 27, there is a compression gap between the upper support pillar 723 and the lower support pillar 28 and the compression gap is not greater than 1 cm. Among them, the compression gap can be set according to the wall thickness of the steel pipe joint so that when the steel pipe joint abuts against the lower support pad 72, the upper support pillar 723 and the lower support pillar 28 abut. In this embodiment, the compression gap between the upper support pillar 723 and the lower support pillar 28 is designed to be 5 mm.

[0050] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A clamping device for clamping an inclined steel pipe core pile, characterized in that: The invention comprises a pile driver chassis (1) and a guide frame (2) installed on the pile driver chassis (1) and used for sliding an inclined steel pipe core pile. The guide frame (2) is provided with a clamping mechanism for clamping the lower section of the steel pipe core pile near the bottom end. The clamping mechanism comprises two clamping cylinders (6) arranged symmetrically in the horizontal direction. The piston rods of the two clamping cylinders (6) are arranged facing each other. A clamping plate (61) is installed at the end of the piston rod of the clamping cylinder (6). The clamping plate (61) has a clamping arc surface (611) on the side facing away from the clamping cylinder (6).

2. A clamp device for clamping an inclined steel pipe core pile according to claim 1, characterized in that: The clamping plate (61) is provided with a rubber gasket (612) on the clamping arc surface (611).

3. A clamp device for clamping an inclined steel pipe core pile according to claim 1, characterized in that: The guide frame (2) is provided with a guide slot (22) for the inclined steel pipe core pile to slide downward.

4. A clamp device for clamping an inclined steel pipe core pile according to claim 3, characterized in that: The guide frame (2) has a plurality of support pads arranged at intervals along the length direction on the bottom surface of the guide slot (22).

5. A clamp device for clamping an inclined steel pipe core pile according to claim 4, characterized in that: The support pad is provided with an arc-shaped groove (73) for arranging the inclined steel pipe core pile.

6. A clamp device for clamping an inclined steel pipe core pile according to claim 5, characterized in that: The support pad comprises an upper support pad (71) located on the upstream side of the clamping mechanism and a lower support pad (72) located on the downstream side of the clamping mechanism; the lower support pad (72) is provided with a guide slope (74) on a side facing the clamping mechanism.

7. A clamp device for clamping an inclined steel pipe core pile according to claim 6, characterized in that: The guide frame (2) is provided with a support groove (25) on the bottom surface of the guide slide groove (22) for the lower support pad (72) to slide, and a support spring (8) is arranged in the support groove (25) for supporting the lower support pad (72).

8. The clamp device for clamping an inclined steel pipe core pile according to claim 6, characterized in that: The number of the lower supporting pads (72) is no less than two.

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