Support frame for fir pile foundation and construction method

Abstract

The present invention discloses a support frame and construction method for a fir pile foundation, comprising a fir pile, a bottom fixing member provided with a first piling hole, and a top sliding groove provided on the bottom fixing member; a top fixing member arranged on the top of the bottom fixing member and provided with a second piling hole, the projections of the first piling hole and the second piling hole on a horizontal plane overlapping, and a bottom sliding groove provided on the top fixing member; a support rod for connecting the bottom fixing member and the top fixing member corresponding to the position of the same fir pile; a telescopic member installed on the support rod, with sliders installed at both ends of the telescopic member, the sliders sliding in corresponding sliding grooves respectively, an extrusion plate installed on each slider via a connecting rod, and a spring installed between the connecting rod and the slider; and a connecting assembly for connecting the top fixing members and the bottom fixing members on adjacent fir piles. This ensures that the fir piles are vertically driven to prevent deviation, while also improving the overall stability of the foundation and preventing uneven settlement.

Description

Technical Field

[0001] The invention relates to foundation pit construction technology, in particular to a support frame for a fir pile foundation and a construction method. Background Art

[0002] At present, fir pile foundations are often used in hydraulic structures. The following problems may occur during the construction process:

[0003] First, positioning is difficult to control during construction, and the construction of a large number of fir piles is more likely to cause pile foundation deviation;

[0004] Secondly, a large number of fir piles are not integrated, which will lead to inconsistent settlement of each pile and uneven settlement. Based on the above reasons, the present invention is designed. Summary of the Invention

[0005] The invention aims to ensure that the fir piles are driven vertically to prevent deviation, and at the same time improve the overall stability of the foundation to prevent uneven settlement.

[0006] The present invention adopts the following technical solutions:

[0007] A support frame for a fir pile foundation, comprising the fir piles, and further comprising:

[0008] The bottom fixing pieces are equal in number to the fir piles and have corresponding positions. The bottom fixing pieces are provided with a pile driving hole 1 and a top sliding groove.

[0009] The number of top fixings is equal to the number of fir piles and the positions thereof correspond one to one. The top fixings are arranged on the top of the bottom fixings and are provided with a second piling hole. The projections of the first piling hole and the second piling hole on the horizontal plane coincide with each other. The top fixings are provided with a bottom slide.

[0010] A support rod, the support rod is used to connect the bottom fixing piece and the top fixing piece corresponding to the same fir pile position;

[0011] Telescopic member, the telescopic member is installed on the support rod, and sliders are installed at both ends of the telescopic member. The sliders slide in the corresponding slide grooves respectively. An extrusion plate is installed on each slider through a connecting rod, and a spring is installed between the connecting rod and the slider;

[0012] The connecting assembly is used to connect the top fixing parts and the bottom fixing parts on adjacent fir piles.

[0013] Optimal solution: the bottom fixing member and the top fixing member are symmetrically distributed and both include a disc portion and a flange portion, the two disc portions are located on the side opposite to the two flange portions, dovetail guide strips are radially arranged on the disc portions, and the extrusion plate is provided with horizontal grooves adapted to the dovetail guide strips, the top slide groove and the bottom slide groove are respectively arranged on the inner walls of the corresponding flange portions, and the disc portion of the top fixing member is smaller than the disc portion of the bottom fixing member.

[0014] Preferably, the support rod comprises a rod body and connecting blocks mounted at both ends of the rod body, a T-shaped slot is provided on the bottom fixing piece and the top fixing piece, the connecting blocks and the T-shaped slot are adapted to be mounted, and a fork body is mounted in the middle of the rod body;

[0015] The telescopic part includes a threaded sleeve and two threaded rods. The threads of the two threaded rods have opposite rotation directions. The rotating threaded sleeve drives the two threaded rods to move in opposite directions. A ring groove adapted to the fork body is provided in the middle of the threaded sleeve, and the corresponding sliders are fixedly installed at both ends of the threaded rod.

[0016] Preferably, the connecting assembly comprises an X-shaped hinged frame, the four free ends of the hinged frame are hingedly connected to fixed seats, and the lengths of the four free ends are adjustable within a range of 2 to 5 cm, and the opposite sides of the two fixed seats on the same side are both sloped surfaces;

[0017] A positioning groove is provided on the outer side of the flange portion, and the positioning groove is located at the root of the top chute or the bottom chute;

[0018] The side of each slider away from the middle of the telescopic member is a sloped surface;

[0019] By adjusting the distance between the two sliders, the sliders fix the fixing seat in the positioning groove via the slope surface.

[0020] Preferably, a limiting block is provided on the groove wall of the positioning groove, and a notch adapted to the limiting block is provided on the fixing seat.

[0021] Preferably, vertical guide bodies are installed on opposite sides of the flange portion, and are circumferentially arranged in the flange portion. The vertical guide bodies on the top fixing member and the bottom fixing member are used together for vertically lowering the fir piles during piling.

[0022] Preferably, the inner wall of the flange portion is provided with T-shaped slots and connecting holes, and multiple groups of T-shaped slots are provided and evenly distributed on opposite sides of the flange portion;

[0023] The vertical guide body includes a guide wheel and a connecting plate. Two hinged rods are installed on the guide wheel and T-shaped plugs are installed at the ends of the hinged rods. An elastic body is installed between the two hinged rods. The T-shaped plug and the T-shaped slot are adapted to be installed. An extrusion body is provided on the connecting plate, and the extrusion body is suitable for being inserted in the T-shaped slot. A connecting bolt is installed on the connecting plate, and the connecting bolt is installed in the connecting hole.

[0024] Preferred solution: the bottom fixing piece and the top fixing piece have upper limit holes, and limit bolts are installed in the limit holes, and the limit bolts are used to fix the connecting block.

[0025] A construction method for a support frame for a fir pile foundation, comprising the following steps:

[0026] Step 1: Lay out the lines on the fir pile operation surface and carry out earth excavation. After the excavation is completed, re-measure the foundation pit elevation to ensure that it is correct. Stake out the earth surface and draw the fir pile driving position according to the drawing requirements. The support frame is brought into the site and the ground is leveled at the fir pile driving position.

[0027] Step 2: Install the disc part of the bottom fixing piece on the piling position of the fir pile and fix it. Remeasure the elevation of the flange part of the bottom fixing piece and correct it to the same elevation. Fit the connecting blocks at both ends of the support rod into the T-slot and fix them with limit bolts to complete the assembly of the top fixing piece and the bottom fixing piece. Hang the threaded sleeve of the telescopic piece on the fork body of the support rod. In the initial state, the two sliders are symmetrically distributed on both sides of the fork body.

[0028] Step 3: Install the T-shaped inserts of the vertical guide body into the corresponding T-shaped slots, and preliminarily install the connecting plate on the flange part via the connecting bolts, with the extrusion body located in the T-shaped slots;

[0029] Step 4: Repeat steps 2 and 3 until all support frames are installed;

[0030] Step 5: The fir piles are brought into the site. First, one or two test piles are positioned at the corners of the fir pile construction area. After the fir piles enter the piling holes 1 and 2, the connecting bolts on the bottom fixing parts and the top fixing parts are adjusted to drive the connecting plate gradually close to the flange part. The guide wheel squeezes and centers the fir piles and the piles are driven. After completion, the piles are driven one by one until the top and the top fixing parts are flush. This is done until all the fir piles are driven.

[0031] Step 6: Insert the fixing seats at the four free ends of the X-shaped hinged frame into the positioning grooves. By adjusting the threaded sleeves, the two threaded rods move in opposite directions. The sliders gradually approach the corresponding disc parts. At the same time, the extrusion plate moves radially along the dovetail guide strips on the disc parts to press and fix the fir piles. At the same time, the sloped surface of the sliders presses the fixing seats into the positioning grooves, completing the overall connection of the fir piles.

[0032] Step seven: Remove the support rods, connecting plates and vertical guide bodies, support the formwork outside the fir pile foundation area and pour the cushion layer to the pile head surface. Subsequent construction can only be carried out after the cushion layer strength meets the standard.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention provides a top fixing member and a bottom fixing member, and utilizes a support rod between the top fixing member and the bottom fixing member as a temporary support during piling to ensure the spacing between the two. Vertical guide bodies are provided on the flanges of the top fixing member and the bottom fixing member to ensure verticality during piling. The top fixing member is also used to control the elevation or driving depth of the pile head. After piling is completed, a connecting assembly is first installed to connect a plurality of fir piles to the top fixing member and the bottom fixing member located on the outside. By rotating the threaded sleeve of the telescopic member, the corresponding slider drives the extrusion block along the dovetail guide strip on the corresponding circular disc portion to gradually press the fir pile. Simultaneously, the slider presses and fixes the fixing seat located in the positioning groove. The temporary support rod and vertical guide body are then removed for subsequent reuse, and the cushion layer is then laid. The verticality of the fir piles during piling is ensured to prevent deviation. The use of support frames ensures that all the fir piles are fixed more firmly and integrally, preventing uneven settlement. The fir piles will not shift up and down relative to the support frames, damaging the cushion foundation structure. If uneven settlement occurs at the bottom, the support frames will pull adjacent fixings together to prevent relative settlement. While fixing the fir piles, adjacent fixings will form a cross network, significantly improving the integrity and stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 This is a structural diagram of the support frame unit and the fir pile installation structure of the present invention;

[0037] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0038] Figure 4 This is a diagram showing the internal structure distribution of the flange portion of the vertical guide body of the present invention;

[0039] Figure 5 A structural diagram of a top fixing member or a bottom fixing member of the present invention;

[0040] Figure 6 This is the assembly structure diagram of the connecting block and T-slot;

[0041] Figure 7 This is the installation structure diagram of the extruded plate and dovetail guide bar;

[0042] Figure 8 This is a diagram of the connection structure between the fork body and the threaded sleeve;

[0043] Figure 9 This is the structural diagram of the X-shaped articulated frame. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0046] Example 1, as Figure 1 、 Figure 2 As shown, a support frame for a fir pile foundation comprises a fir pile 1.

[0047] like Figure 2 As shown, it also includes:

[0048] The bottom fixing members 2 are equal in number to the fir piles 1 and have corresponding positions. The bottom fixing members 2 are provided with a pile driving hole 1 and a top slide 21.

[0049] The number of top fixing members 3 is equal to that of the fir piles 1 and their positions correspond one to one. The top fixing members 3 are arranged on top of the bottom fixing members 2 and are provided with piling holes 2. The projections of the piling holes 1 and 2 on the horizontal plane coincide with each other. The top fixing members 3 are provided with bottom slide grooves 31.

[0050] A support rod 4 is used to connect the bottom fixing piece 2 and the top fixing piece 3 corresponding to the position of the same fir pile 1;

[0051] Telescopic member 5, the telescopic member 5 is installed on the support rod 4, and sliders 51 are installed at both ends of the telescopic member 5. The sliders 51 slide in corresponding slide grooves respectively. An extrusion plate 53 is installed on each slider 51 through a connecting rod 52. A spring is installed between the connecting rod 52 and the slider 51;

[0052] The connecting assembly is used to connect the top fixing parts 3 and the bottom fixing parts 2 on adjacent fir piles 1.

[0053] like Figure 2 、 Figure 5 、 Figure 7As shown, the bottom fixing member 2 and the top fixing member 3 are symmetrically distributed and both include a disc portion 6 and a flange portion 7. The two disc portions 6 are located on the side opposite to the two flange portions 7. Dovetail guide strips 61 are radially arranged on the disc portion 6. The extrusion plate 53 is provided with a horizontal groove adapted to the dovetail guide strip 61. The top slide 21 and the bottom slide 31 are respectively arranged on the inner walls of the corresponding flange portion 7. The disc portion 6 of the top fixing member 3 is smaller than the disc portion 6 of the bottom fixing member 2.

[0054] like Figure 2 and Figure 6 As shown, the support rod 4 includes a rod body 41 and connecting blocks 42 installed at both ends of the rod body 41, a T-shaped slot 8 is provided on the bottom fixing member 2 and the top fixing member 3, the connecting blocks 42 and the T-shaped slot 8 are adapted to be installed, and a fork body 43 is installed in the middle of the rod body 41;

[0055] like Figure 8 As shown, the telescopic member 5 includes a threaded sleeve 54 and two threaded rods 55. The threads of the two threaded rods 55 have opposite rotation directions. The rotating threaded sleeve 54 drives the two threaded rods 55 to move in opposite directions. A ring groove 56 adapted to the fork body 43 is provided in the middle of the threaded sleeve 54, and the sliders 51 corresponding to the two ends of the threaded rod 55 are fixedly installed.

[0056] like Figure 1 、 Figure 2 、 Figure 9 As shown, the connecting assembly includes an X-shaped hinged frame 9, the four free ends of the X-shaped hinged frame 9 are hinged with fixed seats 91, the lengths of the four free ends are adjustable, and the opposite sides of the two fixed seats 91 on the same side are both sloped surfaces;

[0057] A positioning groove 71 is provided on the outer side of the flange portion 7 , and the positioning groove 71 is located at the root of the top chute 21 or the bottom chute 31 ;

[0058] The side of each slider 51 away from the middle of the telescopic member 5 is a sloped surface;

[0059] By adjusting the distance between the two sliders 51 , the sliders 51 fix the fixing seat 91 in the positioning groove 71 via the slope surface.

[0060] like Figure 3 As shown, a limiting block 72 is provided on the groove wall of the positioning groove 71 , and a notch adapted to the limiting block 72 is provided on the fixing seat 91 .

[0061] Wherein: a vertical guide body 10 is installed on the opposite side of the flange part 7, and the vertical guide body 10 is circumferentially arranged in the flange part 7. The vertical guide bodies 10 on the top fixing member 3 and the bottom fixing member 2 are used together to vertically lower the fir pile 1 when piling.

[0062] like Figure 4As shown, wherein: T-shaped slots 73 and connecting holes are provided on the inner wall of the flange portion 7, and multiple groups of T-shaped slots 73 are provided and evenly distributed on opposite sides of the flange portion 7;

[0063] The vertical guide body 10 includes a guide wheel 101 and a connecting plate 102. Two hinged rods 103 are installed on the guide wheel 101, and the ends of the hinged rods 103 are hingedly installed with T-shaped plugs 104. An elastic body 105 is installed between the two hinged rods 103. The T-shaped plug 104 and the T-shaped slot 73 are adapted to be installed. An extrusion body 106 is provided on the connecting plate 102. The extrusion body 106 is suitable for being inserted into the T-shaped slot 73 and is used to squeeze one of the T-shaped plugs 104 away from the disc part 6. A connecting bolt is installed on the connecting plate 102, and the connecting bolt is installed in the connecting hole.

[0064] like Figure 2 As shown, the bottom fixing member 2 and the top fixing member 3 are provided with limiting holes, and limiting bolts 11 are installed in the limiting holes. The limiting bolts 11 are used to fix the connecting block 42.

[0065] A construction method for a support frame for a fir pile 1 foundation, comprising the following steps:

[0066] Step 1: Lay out the lines on the operating surface of the fir pile 1 and carry out earth excavation. After the excavation is completed, re-measure the foundation pit elevation to ensure that it is correct. Stake out the earth surface and draw the location of the fir pile 1 according to the drawing requirements. The support frame is brought into the site and the leveling is carried out at the location of the fir pile 1.

[0067] Step 2: Install the disc portion 6 of the bottom fixing member 2 at the piling position of the fir pile 1 and fix it. Remeasure the elevation of the flange portion 7 of the bottom fixing member 2 and correct it to the same elevation. Fit the connecting blocks 42 at both ends of the support rod 4 into the T-slot 8 and fix them with the limit bolts 11 to complete the assembly of the top fixing member 3 and the bottom fixing member 2. Hang the threaded sleeve 54 of the telescopic member 5 on the fork body 43 of the rod body 41 of the support rod 4. In the initial state, the two sliders 51 are symmetrically distributed on both sides of the fork body 43.

[0068] Step 3: Install the T-shaped inserts 104 of the vertical guide body 10 into the corresponding T-shaped slots 73, and preliminarily install the connecting plate 102 on the flange portion 7 via the connecting bolts, with the extrusion body 106 located in the T-shaped slots 73;

[0069] Step 4: Repeat steps 2 and 3 until all support frames are installed;

[0070] Step 5: The fir piles 1 are brought into the site. First, one or two test piles are positioned at the corners of the construction area of ​​the fir piles 1. After the fir piles 1 enter the piling holes 1 and 2, the connecting bolts on the bottom fixing piece 2 and the top fixing piece 3 are adjusted to drive the connecting plate 102 gradually close to the flange part 7. The guide wheel 101 squeezes and centers the fir piles 1 and performs the piling process. After completion, the piles are driven one by one until the top is flush with the top fixing piece 3. This is done until all the fir piles 1 are driven.

[0071] Step 6: Adjust the lengths of the four free ends of the X-shaped hinge frame 9 until the fixing seat 91 thereon enters the positioning groove 71, and the notch on the fixing seat 91 enters the positioning groove 71 in a straight line along the limit block 72 on the side of the positioning groove 71. By adjusting the threaded sleeve 54 to drive the two threaded rods to move in opposite directions, the slider 51 gradually approaches the corresponding disc part 6. At the same time, the extrusion plate 53 moves radially along the dovetail guide bar 61 on the disc part 6 to press and fix the fir pile 1. At the same time, the slope surface of the slider 51 will press the fixing seat 91 in the positioning groove 71, completing the overall connection of the fir pile 1.

[0072] Step seven, remove the support rods, connecting plate 102 and vertical guide body, support the formwork outside the foundation area of ​​the fir pile 1 and pour the cushion layer to the pile head surface. Subsequent construction can be carried out only after the cushion layer strength meets the standard.

[0073] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The replacement may be a replacement of a portion of a structure, device, or method step, or it may be a complete technical solution. Any equivalent replacement or modification based on the technical solution and inventive concept of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A support frame for a fir pile foundation, comprising fir piles; It is characterized in that Also includes: The bottom fixing pieces are equal in number to the fir piles and have corresponding positions. The bottom fixing pieces are provided with a pile driving hole 1 and a top sliding groove. The number of top fixings is equal to the number of fir piles and the positions thereof correspond one to one. The top fixings are arranged on the top of the bottom fixings and are provided with a second piling hole. The projections of the first piling hole and the second piling hole on the horizontal plane coincide with each other. The top fixings are provided with a bottom slide. A support rod, the support rod is used to connect the bottom fixing piece and the top fixing piece corresponding to the same fir pile position; Telescopic member, the telescopic member is installed on the support rod, and sliders are installed at both ends of the telescopic member. The sliders slide in the corresponding slide grooves respectively. An extrusion plate is installed on each slider through a connecting rod, and a spring is installed between the connecting rod and the slider; A connecting assembly, the connecting assembly is used to connect top fixing members and bottom fixing members on adjacent fir piles; The bottom fixing member and the top fixing member are symmetrically distributed and each includes a disc portion and a flange portion. The two disc portions are located on the opposite sides of the two flange portions. Dovetail guide strips are radially provided on the disc portions. The extrusion plate is provided with a horizontal groove adapted to the dovetail guide strips. The top slide groove and the bottom slide groove are respectively arranged on the inner walls of the corresponding flange portions. The disc portion of the top fixing member is smaller than the disc portion of the bottom fixing member. The support rod includes a rod body and connecting blocks installed at both ends of the rod body, a T-shaped slot is provided on the bottom fixing piece and the top fixing piece, the connecting blocks and the T-shaped slot are adapted to be installed, and a fork body is installed in the middle of the rod body; The telescopic member includes a threaded sleeve and two threaded rods. The threads of the two threaded rods rotate in opposite directions. The threaded sleeve drives the two threaded rods to move in opposite directions. The middle part of the threaded sleeve is provided with a ring groove adapted to the fork body. The two ends of the threaded rod are fixedly installed with corresponding sliders respectively. The connecting assembly includes an X-shaped hinged frame, the four free ends of the hinged frame are hingedly connected to fixed seats, and the opposite sides of the two fixed seats on the same side are both sloped surfaces; A positioning groove is provided on the outer side of the flange portion, and the positioning groove is located at the root of the top chute or the bottom chute; The side of each slider away from the middle of the telescopic member is a sloped surface; By adjusting the distance between the two sliders, the sliders fix the fixing seat in the positioning groove via the slope surface; A vertical guide body is installed on the opposite side of the flange portion, and the vertical guide body is circumferentially arranged in the flange portion. The vertical guide bodies on the top fixing piece and the bottom fixing piece are used together to vertically lower the fir pile when piling; The inner wall of the flange portion is provided with T-shaped slots and connection holes, and multiple groups of T-shaped slots are provided and evenly distributed on opposite sides of the flange portion; The vertical guide body includes a guide wheel and a connecting plate. Two hinged rods are installed on the guide wheel and T-shaped plugs are installed at the ends of the hinged rods. An elastic body is installed between the two hinged rods. The T-shaped plug and the T-shaped slot are adapted to be installed. An extrusion body is provided on the connecting plate, and the extrusion body is suitable for being inserted in the T-shaped slot. A connecting bolt is installed on the connecting plate, and the connecting bolt is installed in the connecting hole.

2. A support frame for a fir pile foundation according to claim 1, characterized in that: A limiting block is arranged on the groove wall of the positioning groove, and a notch adapted to the limiting block is arranged on the fixing seat.

3. A support frame for a fir pile foundation according to claim 2, characterized in that: The bottom fixing piece and the top fixing piece are provided with limiting holes, and limiting bolts are installed in the limiting holes. The limiting bolts are used to fix the connecting block.

4. A construction method for a support frame for a fir pile foundation according to any one of claims 1 to 3, characterized in that: Here are the steps: Step 1: Lay out the lines on the fir pile operation surface and carry out earth excavation. After the excavation is completed, re-measure the foundation pit elevation to ensure that it is correct. Stake out the earth surface and draw the fir pile driving position according to the drawing requirements. The support frame is brought into the site and the ground is leveled at the fir pile driving position. Step 2: Install the disc part of the bottom fixing piece on the piling position of the fir pile and fix it. Remeasure the elevation of the flange part of the bottom fixing piece and adjust it to the same elevation. Fit the connecting blocks at both ends of the support rod into the T-slot and fix them with limit bolts to complete the assembly of the top fixing piece and the bottom fixing piece. Hang the threaded sleeve of the telescopic piece on the fork body of the support rod. In the initial state, the two sliders are symmetrically distributed on both sides of the fork body. Step 3: Install the T-shaped inserts of the vertical guide body into the corresponding T-shaped slots, and preliminarily install the connecting plate on the flange part via the connecting bolts, with the extrusion body located in the T-shaped slots; Step 4: Repeat steps 2 and 3 until all support frames are installed; Step 5: The fir piles are brought into the site. First, one or two test piles are positioned at the corners of the fir pile construction area. After the fir piles enter the piling holes 1 and 2, the connecting bolts on the bottom fixing parts and the top fixing parts are adjusted to drive the connecting plate gradually close to the flange part. The guide wheel squeezes and centers the fir piles and the piles are driven. After completion, the piles are driven one by one until the tops are flush with the top fixing parts. This is the end of the piling process. Step 6: Insert the fixing seats at the four free ends of the X-shaped hinged frame into the positioning grooves. By adjusting the threaded sleeves, the two threaded rods move in opposite directions. The sliders gradually approach the corresponding disc parts. At the same time, the extrusion plate moves radially along the dovetail guide strips on the disc parts to press and fix the fir piles. At the same time, the sloped surface of the sliders presses the fixing seats into the positioning grooves, completing the overall connection of the fir piles. Step seven: Remove the support rods and vertical guide bodies, support the formwork outside the fir pile foundation area and pour the cushion layer to the pile head surface. Subsequent construction can only be carried out after the cushion layer strength meets the standard.

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