Pile foundation bored pile cross-shaped fender pile tool and construction technology

Abstract

The invention relates to the technical field of bored pile construction, and discloses a pile foundation bored pile cross-shaped fender pile tool and a construction technology.The pile foundation bored pile cross-shaped fender pile tool comprises a cover plate, a pipe body and a bottom plate which are sequentially arranged from top to bottom, reinforcing steel bars are arranged in the pipe body, a through hole is formed in the middle of the cover plate, and the reinforcing steel bars penetrate through the through hole to extend to the outside; and a height adjusting mechanism is arranged between the inner bottom of the pipe body and the reinforcing steel bar. The stability and the data reliability of the bored pile fender pile are greatly improved by adopting the bearing plate and the burial depth mode, the pile casing and pile center positioning is more accurate, the working efficiency is effectively improved, the construction period is shortened, reinforcing steel bars and concrete do not need to be wasted for manufacturing the fender pile, all components can be recycled, and the economic applicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of bored pile construction, in particular to a pile foundation bored pile cross pile guard tooling and a construction process. Background Art

[0002] At present, the method of determining the position of bored piles is: according to the control network and the design coordinates of bored piles, the pile position is accurately placed with a total station or GPS, and long wooden piles (with iron nails on them) or short steel bars are inserted into the soil layer at the position around the pile position that does not affect the construction, and then the pile guards are set by pouring concrete on the surface or backfilling the soil to compact, so as to accurately mark the center of the pile position when burying the casing (the center position of the casing burial can be corrected at any time during the burial process), and the bored pile construction is carried out after accurate positioning, so as to ensure the accurate construction position of the pile foundation. However, in the actual construction process, the pile guards are easily affected by the vibration of the soil layer generated by the operation of mechanical equipment (drilling equipment, excavators, etc.), and the deviation is serious, which is not conducive to checking the center of the pile position. In addition, the concrete wrapping method wastes a lot of concrete and steel bars, which increases the project cost. Summary of the invention

[0003] In view of the shortcomings of the prior art, the technical solution adopted by the present invention to solve the technical problems is: a pile foundation bored pile cross guard tooling, including a cover plate, a tube body and a bottom plate arranged in sequence from top to bottom, a steel bar is arranged in the tube body, a through hole is opened in the middle of the cover plate, the steel bar extends to the outside through the through hole, and a height adjustment mechanism is provided between the bottom of the tube body and the steel bar.

[0004] Preferably, the height adjustment mechanism includes a base and a top block, a pair of support rods are provided at the top of the base, the end of the support rod away from the base is abutted against a fixed plate, the top block is installed at the bottom of the fixed plate, a bidirectional screw rod is provided between the two support rods, sliders are symmetrically sleeved on the bidirectional screw rod, a linkage structure is provided between the slider, the fixed plate and the base, one end of the bidirectional screw rod is connected to a rotating motor, and a motor controller is provided inside the tube body.

[0005] Preferably, the linkage structure includes connecting rod one, connecting rod two, connecting rod three and connecting rod four, the right end of connecting rod one and the left end of connecting rod two are both rotatably connected to the base, the left end of connecting rod one and the left end of connecting rod three are both rotatably connected to the slider on the left side, the right end of connecting rod three and the left end of connecting rod four are both rotatably connected to the top block, and the right end of connecting rod four and the right end of connecting rod two are both rotatably connected to the slider on the right side.

[0006] Preferably, the cover plate is 50 mm long and wide, and 6 mm thick; the inner diameter of the tube body is 50 mm, and the thickness is 3 mm; the bottom plate is 200 mm long and wide, and 6 mm thick.

[0007] Preferably, the steel bar has a diameter of 20 mm and a length of not less than 100 cm, and the length of the tube body is slightly smaller than the length of the steel bar.

[0008] The invention also discloses a construction process for pile foundation bored pile cross guard piles, comprising the following steps:

[0009] S1. Construction preparation: water, electricity, roads, and site leveling;

[0010] S2. Pile guard tools and drilling equipment enter the site;

[0011] S3. Pile center measurement and layout: Calculate the pile position coordinates according to the design drawings, and use the total station to layout after verifying the pile position coordinates. After the layout is completed, use the method of changing hands to re-measure and pull distance to check to ensure that it is correct, and then set the cross-shaped guard pile;

[0012] S4. Bury the guard piles: bury the piles by drilling holes with rotary drilling rods, and use slag or stone slag to backfill and compact;

[0013] S5. Bury the casing and adjust the center position of the casing according to the guard piles: the casing burial position is located according to the cross guard piles, and the distance between each guard pile and the casing is 70 to 100 cm;

[0014] S6, drilling machinery is in place;

[0015] S7. Drill the pile to the designed elevation: When drilling, check the rebound of the wire rope at any time, listen to the impact sound of the drill bit to determine the bottom of the hole, grasp the principle of frequent loosening and a small amount of loose rope, pay attention to the formation changes at any time during the drilling process, collect slag samples at the place where the formation changes, determine the geological type, record it in the record table, and compare it with the geological profile provided by the design institute. If there is any inconsistency, report it in time;

[0016] S8. Hole cleaning and pouring pile body concrete: After the drilling reaches the required depth, the hole should be cleaned by mud circulation or slag extraction to avoid long delays, mud residue sedimentation, and difficulty in hole cleaning or hole collapse. For the sediment at the bottom of the hole, a slag extraction tube should be used to remove it. After the slag extraction tube is placed at the bottom of the hole, it should be lifted up and down several times at the bottom of the hole to remove as much drilling debris as possible, and then lifted out. Concrete pouring adopts the method of pouring underwater concrete by the conduit method;

[0017] S9. Pull out the pile guard tooling.

[0018] Preferably, the buried depth of the steel bars in the pile guard tooling in S4 needs to be no less than 30 cm, and the pile guard has an external protection frame.

[0019] Preferably, the pile guard tooling in S5 needs to be 3 to 5 cm higher than the top surface of the casing. If there is a height difference in the on-site terrain, the exposed height of the steel bars can be adjusted by adjusting the height adjustment mechanism inside the pipe body to ensure that the pile guard is higher than the casing.

[0020] Preferably, before the drilling rig in S6 is put into place, the main machinery and supporting equipment should be inspected and repaired to ensure that all equipment can operate normally before entering the construction site. When installing the drilling rig, the base should be level, the lifting pulley rim and the center of the casing should be in the same straight line, and regular inspections and corrections should be carried out to avoid displacement and sinking.

[0021] As a preferred method, the method of pouring underwater concrete through the conduit described in S8 should ensure the initial increase of concrete to prevent water from entering the conduit, ensure that the first batch of concrete can bury the conduit, regularly check the sealing performance of the conduit through watertight tests, and deal with problems in a timely manner. During the pouring process, the buried depth of the conduit should be carefully measured to eliminate depth measurement errors. The organization of concrete construction should be strengthened to ensure the continuity of concrete construction, and the burial depth should be strictly controlled. Under normal circumstances, it should not exceed 6m. In addition, a vibrator can be installed in the pouring funnel. When the workability of the concrete is not very good, vibrating it every few minutes can prevent pipe blockage.

[0022] The beneficial effects of the present invention are as follows: compared with the traditional method of burying guard piles, the use of load-bearing plates and burial depth greatly improves the stability and data reliability of bored pile guard piles, makes the positioning of casings and pile centers more accurate, effectively improves work efficiency, reduces construction period, and does not need to waste steel bars and concrete to make guard piles. All components can be reused, and are economical and practical.

[0023] By welding a steel base plate with a size of 200*200*6mm at the bottom of the tooling, the force-bearing surface with the buried bottom soil layer is increased, and the impact of soil vibration generated by the operation of mechanical equipment (drilling equipment, excavator, etc.) is reduced. The data for checking the center of the pile position is more accurate, which is conducive to the center positioning of the casing and bored pile.

[0024] The present invention has been tested in the newly built Hefei-Wuhan high-speed railway and has been put into use on a large scale. It has been tested on site in terms of cost, construction period, etc., and has greatly improved work efficiency (time, cost). BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the tooling of the present invention;

[0026] Figure 2 is a cross-sectional view of the height adjustment mechanism of the present invention;

[0027] Figure 3 It is a schematic diagram of the linkage structure in the present invention.

[0028] In the figure: 1, cover plate; 11, through hole; 2, tube body; 3, bottom plate; 4, steel bar; 5, base; 51, connecting rod one; 52, connecting rod two; 6, top block; 61, connecting rod three; 62, connecting rod four; 7, support rod; 71, fixing plate; 72, bidirectional screw rod; 73, slider; 74, rotating motor. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0030] like Figure 1 As shown, a pile foundation bored pile cross guard tooling comprises a cover plate 1, a tube body 2 and a bottom plate 3 which are arranged in sequence from top to bottom, a steel bar 4 is arranged in the tube body 2, a through hole 11 is opened in the middle of the cover plate 1, and the steel bar 4 extends to the outside through the through hole 11, wherein the cover plate 1 is 50 mm long and wide, and 6 mm thick, the tube body 2 has an inner diameter of 50 mm, a length of 90 cm, and a thickness of 3 mm, and the surface of the tube body 2 is sprayed with yellow and black paint with a line width of 10 cm, the bottom plate 3 is 200 mm long and wide, and 6 mm thick, the steel bar 4 has a diameter of 20 mm, and a length of not less than 100 cm.

[0031] like Figure 2-3As shown, a height adjustment mechanism is provided between the bottom of the tube body 2 and the steel bar 4, and the height adjustment mechanism includes a base 5 and a top block 6. A pair of support rods 7 are fixedly installed on the top of the base 5, and the end of the support rod 7 away from the base 5 abuts against a fixed plate 71. The support rod 7 will not limit the rise of the fixed plate 71. The top block 6 is installed at the bottom of the fixed plate 71. A bidirectional screw rod 72 is provided between the two support rods 7, and a slider 73 is symmetrically sleeved on the bidirectional screw rod 72. A linkage structure is provided between the slider 73 and the fixed plate 71 and the base 5. A rotating motor 74 is connected to one end of the bidirectional screw rod 72. A motor controller is provided inside the tube body 2. The motor controller is used to control the rotation direction and start and shut down of the rotating motor 74. At the same time, a remote controller is equipped with the motor controller, and the remote controller is connected to the motor controller through wireless communication. The wireless communication technology belongs to conventional technology and will not be repeated here. The user can directly control the remote control The device is used to control the operation of the rotating motor 74 to realize the lifting and lowering of the fixed plate 71. The linkage structure includes a connecting rod 1 51, a connecting rod 2 52, a connecting rod 3 61 and a connecting rod 4 62. The right end of the connecting rod 1 51 and the left end of the connecting rod 2 52 are both rotatably connected to the base 5, the left end of the connecting rod 1 51 and the left end of the connecting rod 3 61 are both rotatably connected to the left slider, the right end of the connecting rod 3 61 and the left end of the connecting rod 4 62 are both rotatably connected to the top block 6, the right end of the connecting rod 4 62 and the right end of the connecting rod 2 52 are both rotatably connected to the right slider, and the rotating motor 74 drives the bidirectional screw rod 72 to rotate. The positive rotation of the bidirectional screw rod 72 can drive the two sliders to move relative to each other, so that the linkage structure expands left and right (the distance between the left and right ends is enlarged), thereby driving the fixed plate 71 to descend; the reverse rotation of the bidirectional screw rod 72 can drive the two sliders to move toward each other, and the linkage structure contracts left and right (the distance between the left and right ends is reduced), thereby driving the fixed plate 71 to rise.

[0032] A construction process for pile foundation bored pile cross guard piles, characterized in that it comprises the following steps:

[0033] S1. Construction preparation: water, electricity, roads, and site leveling;

[0034] S2. Pile guard tools and drilling equipment enter the site;

[0035] S3. Pile center measurement and layout: Calculate the pile position coordinates according to the design drawings, and use the total station to layout after verifying the pile position coordinates. After the layout is completed, use the method of changing hands to re-measure and pull distance to check to ensure that it is correct, and then set the cross-shaped guard pile;

[0036] S4. Bury the guard piles: bury the piles by drilling holes with rotary drilling rods, and use slag or stone slag to backfill and compact;

[0037] S5. Bury the casing and adjust the center position of the casing according to the guard piles: the casing burial position is located according to the cross guard piles, and the distance between each guard pile and the casing is 70 to 100 cm;

[0038] S6, drilling machinery is in place;

[0039] S7. Drill the pile to the designed elevation: When drilling, check the rebound of the wire rope at any time, listen to the impact sound of the drill bit to determine the bottom of the hole, grasp the principle of frequent loosening and a small amount of loose rope, pay attention to the formation changes at any time during the drilling process, collect slag samples at the place where the formation changes, determine the geological type, record it in the record table, and compare it with the geological profile provided by the design institute. If there is any inconsistency, report it in time;

[0040] S8. Hole cleaning and pouring pile body concrete: After the drilling reaches the required depth, the hole should be cleaned by mud circulation or slag extraction to avoid long delays, mud residue sedimentation, and difficulty in hole cleaning or hole collapse. For the sediment at the bottom of the hole, a slag extraction tube should be used to remove it. After the slag extraction tube is placed at the bottom of the hole, it should be lifted up and down several times at the bottom of the hole to remove as much drilling debris as possible, and then lifted out. Concrete pouring adopts the method of pouring underwater concrete by the conduit method;

[0041] S9. Pull out the pile guard tooling.

[0042] The buried depth of the steel bars 4 in the pile guard tooling in S4 needs to be no less than 30 cm, and the pile guard has an external protection frame.

[0043] The pile guard tooling in S5 needs to be 3 to 5 cm higher than the top surface of the casing. If there is a height difference in the on-site terrain, the exposed height of the steel bar 4 can be adjusted by adjusting the height adjustment mechanism inside the pipe body 2 to ensure that the pile guard is higher than the casing.

[0044] Before the S6 drilling rig is put into place, the main machinery and supporting equipment should be inspected and repaired to ensure that all equipment is operating normally before entering the construction site. When installing the drilling rig, the base should be level, the lifting pulley rim and the center of the casing should be in the same straight line, and regular inspections and corrections should be carried out to avoid displacement and sinking.

[0045] In S8, the method of pouring underwater concrete by the conduit method should ensure the initial increase of concrete to prevent water from entering the conduit, ensure that the first batch of concrete can bury the conduit, regularly check the sealing performance of the conduit through watertight tests, and deal with problems in a timely manner. During the pouring process, carefully measure the buried depth of the conduit to eliminate depth measurement errors. Strengthen the organization of concrete construction, ensure the continuity of concrete construction, strictly control the burial depth, and do not exceed 6m under normal circumstances. In addition, a vibrator can be installed in the pouring funnel. When the workability of the concrete is not very good, vibrate it every few minutes to prevent pipe blockage.

[0046] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A pile foundation bored pile cross pile guard tooling, characterized by: The invention comprises a cover plate (1), a tube body (2) and a bottom plate (3) which are arranged in sequence from top to bottom, wherein a steel bar (4) is arranged inside the tube body (2), a through hole (11) is opened in the middle of the cover plate (1), the steel bar (4) passes through the through hole (11) and extends to the outside, and a height adjustment mechanism is provided between the bottom of the tube body (2) and the steel bar (4).

2. A pile foundation bored pile cross pile guard tooling according to claim 1, characterized in that: The height adjustment mechanism comprises a base (5) and a top block (6); a pair of support rods (7) are provided at the top of the base (5); one end of the support rod (7) away from the base (5) is abutted against a fixed plate (71); the top block (6) is mounted on the bottom of the fixed plate (71); a bidirectional screw rod (72) is provided between the two support rods (7); a slider (73) is symmetrically sleeved on the bidirectional screw rod (72); a linkage structure is provided between the slider (73), the fixed plate (71) and the base (5); one end of the bidirectional screw rod (72) is connected to a rotating motor (74); and a motor controller is provided inside the tube body (2).

3. A pile foundation bored pile cross pile guard tooling according to claim 2, characterized in that: The linkage structure comprises a connecting rod 1 (51), a connecting rod 2 (52), a connecting rod 3 (61) and a connecting rod 4 (62); the right end of the connecting rod 1 (51) and the left end of the connecting rod 2 (52) are both rotatably connected to the base (5); the left end of the connecting rod 1 (51) and the left end of the connecting rod 3 (61) are both rotatably connected to the left slider; the right end of the connecting rod 3 (61) and the left end of the connecting rod 4 (62) are both rotatably connected to the top block (6); and the right end of the connecting rod 4 (62) and the right end of the connecting rod 2 (52) are both rotatably connected to the right slider.

4. A pile foundation bored pile cross pile guard tooling according to claim 1, characterized in that: The cover plate (1) has a length and width of 50 mm and a thickness of 6 mm; the tube body (2) has an inner diameter of 50 mm and a thickness of 3 mm; the bottom plate (3) has a length and width of 200 mm and a thickness of 6 mm.

5. The cross pile protection tool for pile foundation bored pile according to claim 1, characterized in that: The steel bar (4) has a diameter of 20 mm and a length of not less than 100 cm, and the length of the tube body (2) is slightly smaller than the length of the steel bar (4).

6. A construction process for pile foundation bored pile cross guard piles based on claim 1, characterized in that: The following steps are involved: S1. Construction preparation: water, electricity, roads, and site leveling; S2. Pile guard tools and drilling equipment enter the site; S3. Pile center measurement and layout: Calculate the pile position coordinates according to the design drawings, and use the total station to layout after verifying the pile position coordinates. After the layout is completed, use the method of changing hands to re-measure and pull distance to check to ensure that it is correct, and then set the cross-shaped guard pile; S4. Bury the guard piles: bury the piles by drilling holes with rotary drilling rods, and use slag or stone slag to backfill and compact; S5. Bury the casing and adjust the center position of the casing according to the guard piles: the casing burial position is located according to the cross guard piles, and the distance between each guard pile and the casing is 70 to 100 cm; S6, drilling machinery is in place; S7. Drill the pile to the designed elevation: When drilling, check the rebound of the wire rope at any time, listen to the impact sound of the drill bit to determine the bottom of the hole, grasp the principle of frequent loosening and a small amount of loose rope, pay attention to the formation changes at any time during the drilling process, collect slag samples at the place where the formation changes, determine the geological type, record it in the record table, and compare it with the geological profile provided by the design institute. If there is any inconsistency, report it in time; S8. Hole cleaning and pouring pile body concrete: After the drilling reaches the required depth, the hole should be cleaned by mud circulation or slag extraction to avoid long delays, mud residue sedimentation, and difficulty in hole cleaning or hole collapse. For the sediment at the bottom of the hole, a slag extraction tube should be used to remove it. After the slag extraction tube is placed at the bottom of the hole, it should be lifted up and down several times at the bottom of the hole to remove as much drilling debris as possible, and then lifted out. Concrete pouring adopts the method of pouring underwater concrete by the conduit method; S9. Pull out the pile guard tooling.

7. The construction process of a pile foundation bored pile cross guard pile according to claim 6, characterized in that: The buried depth of the steel bars (4) in the pile guard tooling in S4 should be no less than 30 cm, and the pile guard has an external protection frame.

8. The construction process of a pile foundation bored pile cross guard pile according to claim 6, characterized in that: The pile guard tooling described in S5 needs to be 3 to 5 cm higher than the top surface of the casing. If there is a height difference in the on-site terrain, the exposed height of the steel bar (4) is adjusted by adjusting the height adjustment mechanism inside the pipe body (2) to ensure that the pile guard is higher than the casing.

9. The construction process of a pile foundation bored pile cross guard pile according to claim 6, characterized in that: Before the drilling rig in S6 is put into place, the main machinery and supporting equipment should be inspected and repaired to ensure that all equipment can operate normally before entering the construction site. When installing the drilling rig, the base should be level, the lifting pulley rim and the center of the casing should be in the same straight line, and regular inspections and corrections should be carried out to avoid displacement and sinking.

10. The construction process of pile foundation bored pile cross guard pile according to claim 6, characterized in that: The method of pouring underwater concrete through the conduit described in S8 should ensure the initial increase of concrete to prevent water from entering the conduit, ensure that the first batch of concrete can bury the conduit, regularly check the sealing performance of the conduit through watertight tests, and deal with problems in a timely manner. During the pouring process, the buried depth of the conduit should be carefully measured to eliminate depth measurement errors. The organization of concrete construction should be strengthened to ensure the continuity of concrete construction, and the buried depth should be strictly controlled. Under normal circumstances, it should not exceed 6m. In addition, a vibrator can be installed in the pouring funnel. When the workability of the concrete is not very good, vibrating it every few minutes can prevent pipe blockage.

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