Pile-forming positioner for collapsible loess foundation

Abstract

The utility model discloses a kind of pile-forming positioners of collapsible loess foundation, comprising: positioning branch pipe, its outside bottom is fixed with bottom plate;Increase expansion support plate, it is four groups, and is respectively rotationally installed at the four sides of bottom plate.The utility model is provided with a series of structures, can drive four increase expansion support plates to rotate to horizontal synchronously when using, to increase the bottom and collapsible loess foundation contact's fit support area, improve the anti-subsidence support effect to positioning branch pipe, it is convenient to fold four increase expansion support plates after use, reduce the area occupied when not using or transporting, bring convenience to transportation work, improve use flexibility, and can be clamped to fit anti-abrasion positioning when pile foundation is formed into pile through positioning branch pipe inside descending, and using two arc clamps can adjust the mode of clamping positioning spacing, suitable for a variety of specifications Pile Foundation Anti-abrasion positioning guide, improve applicability.

Description

Technical Field

[0001] This utility model relates to the field of pile positioning technology, specifically a pile positioning device for collapsible loess foundations. Background Technology

[0002] Currently, when constructing projects on collapsible foundations, it is necessary to consider the potential hazards caused by additional settlement due to foundation collapse, select appropriate foundation treatment methods, and avoid or eliminate the hazards caused by foundation collapse or minor collapse. The main purpose of collapsible loess foundation treatment is to improve the bearing capacity of the foundation by eliminating the collapsibility of loess.

[0003] The most common method for eliminating the collapsibility of foundation soil in existing technology is the compaction pile method, which involves lowering prefabricated pile foundations (plain soil compaction piles) into the collapsible loess foundation to form a composite foundation that synergistically controls collapse. The compaction effect improves the density of the soil, reduces collapsibility, solves the collapsibility problem, and meets the bearing requirements.

[0004] When assembling and lowering piles into collapsible loess foundations, a locator is needed for vertical positioning. Existing technologies commonly use positioning sleeves and sleeve supports as guiding devices, lowering the locator from the top by lifting it. However, this approach has the following drawbacks: 1. Insufficient support force before compaction of the collapsible loess foundation, leading to locator sinking due to the small support area at the bottom (although existing methods increase the lower support area by enlarging the base plate of the locator support, the large area of ​​the integrated support base plate is still a significant issue). This greatly affects the convenience of transportation when not in use, resulting in poor flexibility. 2. Fixed internal positioning dimensions of the positioning sleeve make it difficult to adapt to various pile sizes for anti-wear positioning and guidance, resulting in poor applicability. Therefore, this application proposes a pile locator for collapsible loess foundations to address the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a pile positioning device for collapsible loess foundations to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pile positioning device for collapsible loess foundations, comprising:

[0007] The positioning branch pipe has a base plate fixedly fitted on its outer bottom;

[0008] The expansion support plates are in four sets and are rotatably installed on the four sides of the base plate. The adjacent sides of two opposing expansion support plates are provided with grooves, and the tops of the opposing sides of two opposing expansion support plates are provided with an uneven structure.

[0009] The linkage-type threaded lifting drive assembly is installed on the positioning branch pipe. Four inclined connecting rods are rotatably mounted on its bottom sides, with the bottom ends of the connecting rods rotatably installed in corresponding grooves. Opposite connecting rods are symmetrically arranged. The linkage-type threaded lifting drive assembly drives the four connecting rods to rotate synchronously downwards or upwards. The downward rotation of the four connecting rods drives the four expansion support plates to rotate synchronously outwards to a horizontal position for expansion support work. This increases the support area and improves the stability of the support on collapsible loess foundations. The upward rotation of the four connecting rods pulls the four expansion support plates to rotate synchronously upwards and fold them to the outside of the positioning branch pipe, reducing the space occupied when not in use or after use.

[0010] The clamp anti-wear positioning component consists of two sets installed inside the positioning branch pipe; the two clamp anti-wear positioning components are used by the user to clamp and position the piles as they descend through the inside of the positioning branch pipe during pile foundation construction.

[0011] Preferably, the linkage threaded lifting drive assembly includes a lifting sleeve slidably sleeved on the outside of the positioning branch pipe. Slide grooves are provided on both sides of the positioning branch pipe. A first screw is rotatably installed between the top and bottom inner walls of the two slide grooves. A lifting seat is threaded onto the first screw. Two lifting seats are respectively fixedly connected to the inner walls of both sides of the lifting sleeve. A gear located above the corresponding lifting seat is fixedly sleeved on the first screw. The repulsive sides of the two gears mesh with the same internal gear ring rotatably sleeved on the outside of the positioning branch pipe. The bottom of the internal gear ring is in movable contact with the top of the lifting sleeve. Multiple handles are fixedly connected in a ring at equal intervals on the outside of the internal gear ring. A telescopic protective sleeve movably sleeved on the outside of the positioning branch pipe is fixedly connected between the bottom of the lifting sleeve and the top of the base plate. A connecting rod is rotatably installed at the bottom of the lifting sleeve.

[0012] Preferably, the clamp anti-wear positioning component includes arc-shaped clamps, two of which are symmetrically arranged. Three positioning balls are vertically and equally spaced and movably embedded on the inner wall of the opposing side, the front inner wall, and the rear inner wall of the two arc-shaped clamps. T-shaped screws are rotatably installed on the opposing side of the two arc-shaped clamps. The positioning support pipe is threaded onto the two T-shaped screws. Four horizontal guide rods are fixedly connected in a rectangle on the opposing side of the two arc-shaped clamps. The positioning support pipe is slidably sleeved on the eight horizontal guide rods.

[0013] Preferably, the base plate has rectangular grooves with open tops and bottoms on all four sides, and a first support shaft is welded and fixed between the inner walls of the two sides of the rectangular groove. The top and bottom of the expansion plate are both set as arc-shaped structures. A first round hole is opened on one bottom side of the expansion plate. Two first bearings are fixedly sleeved in the first round hole, and the inner ring of the first bearing is fixedly sleeved with the outer side of the corresponding first support shaft.

[0014] Preferably, the lifting sleeve has an installation groove with an open bottom on all four sides. A second support shaft is fixedly connected between the inner walls of the two sides of the installation groove and the inner walls of the two sides of the groove. A second round hole is opened on the top of one side and the bottom of one side of the connecting rod. Two second bearings are fixedly fitted in the second round hole. The inner ring of the second bearing is fixedly fitted with the outer side of the corresponding second support shaft.

[0015] Preferably, the top of the lifting seat has a first threaded hole that is threadedly connected to the corresponding first screw.

[0016] Preferably, a second threaded hole is provided on the inner wall of both sides of the positioning branch pipe, and the second threaded hole is threadedly connected to the corresponding T-shaped screw.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. By cooperating with the positioning branch pipe, base plate, expansion branch plate, connecting rod and linkage threaded lifting drive assembly, the four expansion branch plates can be driven to rotate outward synchronously to the horizontal during use, so as to increase the contact support area between the bottom and the collapsible loess foundation, improve the support effect on the positioning branch pipe, and reduce its sinking phenomenon.

[0019] It can also fold all four expansion plates together after use, reducing the area occupied when not in use or during transportation, bringing convenience to transportation work and improving the flexibility of use;

[0020] 2. By combining the positioning branch pipe and the anti-wear positioning component, the clamp can be fitted and positioned against wear when the pile foundation descends through the inside of the positioning branch pipe. The clamp positioning distance can be adjusted by using two arc-shaped clamps, which is convenient for anti-wear positioning guidance of pile foundations of various specifications and improves applicability.

[0021] This utility model, through a series of structures, can drive four extended support plates to rotate outward synchronously to a horizontal position during use, thereby increasing the contact area between the bottom and the collapsible loess foundation, improving the anti-sinking support effect on the positioning support pipe, facilitating the folding of the four extended support plates as a whole after use, reducing the area occupied when not in use or during transportation, bringing convenience to transportation work, improving the flexibility of use, and enabling the clamping and anti-wear positioning of the pile when it descends through the inside of the positioning support pipe during pile foundation construction. The clamping and positioning spacing can be adjusted using two arc-shaped clamps, making it suitable for anti-wear positioning guidance for pile foundation construction of various specifications, improving applicability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a pile positioning device for collapsible loess foundation proposed in this utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure viewed from below;

[0024] Figure 3 This is a schematic diagram of the main sectional view of a pile positioning device for collapsible loess foundation proposed in this utility model.

[0025] In the diagram: 1. Positioning branch pipe; 101. Base plate; 102. First support shaft; 104. Expanding support plate; 105. Slide groove; 2. First screw; 201. Gear; 202. Internal gear ring; 203. Handle lever; 204. Lifting seat; 3. Lifting sleeve; 301. Connecting rod; 302. Second support shaft; 303. Telescopic protective rubber sleeve; 4. Arc-shaped clamp; 401. Positioning ball; 402. Horizontal guide rod; 403. T-shaped screw. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1 to 3 As shown in this embodiment, a pile positioning device for collapsible loess foundation includes:

[0028] Positioning branch pipe 1, with a base plate 101 fixedly sleeved on its outer bottom;

[0029] The expansion support plates 104 are in four sets and are rotatably installed on the four sides of the base plate 101. The adjacent sides of two opposing expansion support plates 104 are provided with grooves, and the tops of the opposing sides of two opposing expansion support plates 104 are provided with an uneven structure. The tops of the opposing sides of two opposing expansion support plates 104 are provided with three spare insertion through holes, which are used to further strengthen the positioning work when in a horizontal state with the help of external insertion cones or rods.

[0030] The linkage-type threaded lifting drive assembly is installed on the positioning branch pipe 1. Four inclined connecting rods 301 are rotatably mounted on the bottom of the assembly. The bottom ends of the connecting rods 301 are rotatably installed in corresponding grooves, with opposite connecting rods 301 arranged symmetrically. The linkage-type threaded lifting drive assembly is used to drive the four connecting rods 301 to rotate downwards or upwards synchronously. The downward rotation of the four connecting rods 301 drives the four expansion support plates 104 to rotate outwards synchronously to a horizontal position for expansion support work. This increases the support area and improves the support stability on collapsible loess foundations. The upward rotation of the four connecting rods 301 pulls and drives the four expansion support plates 104 to rotate upwards synchronously and fold to the outside of the positioning branch pipe 1, reducing the space occupied when not in use or after use.

[0031] The clamp anti-wear positioning component consists of two sets installed inside the positioning branch pipe 1; the two clamp anti-wear positioning components are used by the user to clamp and position the pile foundation as it descends through the inside of the positioning branch pipe 1 during pile foundation construction.

[0032] In this embodiment, rectangular grooves with openings at the top and bottom are provided on all four sides of the base plate 101. A first support shaft 102 is welded and fixed between the inner walls of the two sides of the rectangular groove. The top and bottom of the expansion support plate 104 are both set with arc-shaped structures. A first circular hole is provided on the bottom of one side of the expansion support plate 104. Two first bearings are fixedly sleeved in the first circular hole. The inner ring of the first bearing is fixedly sleeved with the outer side of the corresponding first support shaft 102. The first bearing and the first support shaft 102 serve to rotate and install the expansion support plate 104.

[0033] Furthermore, such as Figure 1 and 3 As shown, the linkage threaded lifting drive assembly includes a lifting sleeve 3 that is slidably sleeved on the outside of the positioning branch pipe 1. Both sides of the positioning branch pipe 1 are provided with sliding grooves 105. A first screw 2 is rotatably installed between the top inner wall and the bottom inner wall of the two sliding grooves 105. A lifting seat 204 is threaded on the first screw 2. The two lifting seats 204 are respectively fixedly connected to the inner walls of the two sides of the lifting sleeve 3. A gear 201 located above the corresponding lifting seat 204 is fixedly sleeved on the first screw 2. The two gears 201 mesh with the same internal gear ring 202 that is rotatably sleeved on the outside of the positioning branch pipe 1 on the repulsive side. The bottom of the internal gear ring 202 is in movable contact with the top of the lifting sleeve 3. Multiple handles 203 are fixedly connected in a ring at equal intervals on the outside of the internal gear ring 202. The bottom of the lifting sleeve 3 and the top of the base plate 101 are fixedly connected with the same telescopic protective rubber sleeve 303 that is movably sleeved on the outside of the positioning branch pipe 1. The connecting rod 301 is rotatably installed on the bottom of the lifting sleeve 3.

[0034] In this embodiment, the lifting sleeve 3 has mounting grooves with open bottoms on all four sides. Second support shafts 302 are fixedly connected between the inner walls of the mounting grooves and the inner walls of the recesses. A second circular hole is opened on the top and bottom of one side of the connecting rod 301. Two second bearings are fixedly fitted inside the second circular hole. The inner rings of the second bearings are fixedly fitted to the outer sides of the corresponding second support shafts 302. The second bearings and second support shafts enable the connecting rod 301 to rotate. The top of the lifting seat 204 has a first threaded hole that is threadedly connected to the corresponding first screw 2. The threaded connection between the first screw 2 and the first threaded hole facilitates the upward and downward displacement of the lifting seat 204 when the first screw 2 rotates. Third bearings are fixedly connected to the top and bottom of the sliding groove 105. The inner ring of the third bearing is fixedly connected to the outer side of the corresponding first screw 2, enabling the first screw 2 to rotate.

[0035] In this embodiment, the lifting sleeve 3, the first screw 2, the lifting seat 204, the gear 201, the internal gear ring 202, the handle 203, and the telescopic protective sleeve 303 work together. By pulling the handle 203, the internal gear ring 202 is driven to rotate. The internal gear ring 202 drives the two first screws 2 to rotate through the two gears 201 meshing with it. The rotation of the two first screws 2 drives the two lifting seats 204 to move downward or upward. The two lifting seats 204 drive the lifting sleeve 3 to slide downward or upward on the positioning branch pipe 1, and compress or pull back the telescopic protective sleeve 303 to reset. The upward and downward movement of the lifting sleeve 3 drives the four connecting rods 301 to rotate downward or upward synchronously.

[0036] Furthermore, such as Figure 1 and 3 As shown, the clamp anti-wear positioning component includes an arc-shaped clamp plate 4. Two arc-shaped clamp plates 4 are symmetrically arranged. Three positioning balls 401 are vertically and equidistantly embedded on the inner wall of the opposing side, the front inner wall, and the rear inner wall of the two arc-shaped clamp plates 4. T-shaped screws 403 are rotatably installed on the opposing side of the two arc-shaped clamp plates 4. The positioning support tube 1 is threaded onto the two T-shaped screws 403. Four horizontal guide rods 402 are fixedly connected in a rectangle on the opposing side of the two arc-shaped clamp plates 4. The positioning support tube 1 is slidably sleeved on the eight horizontal guide rods 402.

[0037] In this embodiment, the inner walls of both sides of the positioning branch pipe 1 are provided with second threaded holes, which are threadedly connected to the corresponding T-shaped screws 403. The threaded connection between the T-shaped screws 403 and the second threaded holes facilitates the rotation and lateral displacement of the T-shaped screws 403. The positioning branch pipe 1 is provided with four transverse guide holes on both sides. The inner walls of the transverse guide holes are slidably fitted to the outer sides of the corresponding transverse guide rods 402, allowing the transverse guide rods 402 to pass through and providing lateral sliding guidance. The two opposing sides of the two arc-shaped clamps 4 are fixedly connected with fourth bearings. The inner ring of the fourth bearing is fixedly connected to the outer side of the T-shaped screws 403, enabling the T-shaped screws 403 to be rotated and installed.

[0038] In this implementation scheme, the arc-shaped clamping plate 4, positioning balls 401, T-shaped screws 403, and horizontal guide rods 402 work together. Before the pile foundation is lowered into the positioning support pipe 1, the personnel rotate the two T-shaped screws 403 in the forward direction. The two T-shaped screws 403 rotate and move close to each other in the second threaded hole on the positioning support pipe 1. The two T-shaped screws 403 drive the two arc-shaped clamping plates 4 to move close to each other. The arc-shaped clamping plates 4 drive the corresponding four horizontal guide rods 402 to move laterally for lateral guidance. The close movement of the two arc-shaped clamping plates 4 drives the eighteen positioning balls 401 to clamp and position the pile foundation in the middle. By using the friction of multiple positioning balls 401 to rotate, the vertical anti-wear guidance of the pile foundation is achieved at the same time as clamping and positioning. This achieves the effect of clamping and anti-wear positioning when the pile foundation is lowered into the positioning support pipe 1.

[0039] It should be noted that the positioning branch pipe 1, lifting sleeve 3, first screw 2, lifting seat 204, arc-shaped clamp 4, positioning ball 401, T-shaped screw 403 and horizontal guide rod 402 are all made of stainless steel. The outer thread clearance of the first screw 2 and T-shaped screw 403 is a high wear-resistant load-bearing specification of 0.2-0.35mm. The stainless steel material has the advantages of high hardness, high wear resistance and good maintenance-free effect, which ensures the stability of connection and drive support.

[0040] The usage method of this embodiment is as follows: When using the pile positioning device for collapsible loess foundation, the personnel pull the handle 203 in the forward direction to drive the internal gear ring 202 to rotate. The internal gear ring 202 drives the two first screws 2 to rotate through the two gears 201 meshing with it. The rotation of the two first screws 2 drives the two lifting seats 204 to move downward. The two lifting seats 204 drive the lifting sleeve 3 to slide downward on the positioning support pipe 1 and compress the telescopic protective rubber sleeve 303. The downward movement of the lifting sleeve 3 drives the four connecting rods 301 to rotate downward synchronously. The downward rotation of the four connecting rods 301 squeezes the four expansion support plates 104 to rotate outward synchronously. Under the squeezing force, the four expansion support plates 104 gradually rotate outward synchronously to the horizontal. The four expansion support plates 104 rotated to the horizontal and cooperate with the bottom plate 101 to increase the contact support area between the bottom and the collapsible loess foundation, improve the support effect on the positioning support pipe 1, and reduce its sinking phenomenon.

[0041] Before the pile foundation is lowered into the positioning support pipe 1, the personnel rotate two T-shaped screws 403 in the forward direction. The two T-shaped screws 403 rotate and move close to each other in the second threaded hole on the positioning support pipe 1. The two T-shaped screws 403 drive two arc-shaped clamps 4 to move close to each other. The arc-shaped clamps 4 drive the corresponding four horizontal guide rods 402 to move laterally for lateral guidance. The close movement of the two arc-shaped clamps 4 drives eighteen positioning balls 401 to clamp and position the pile foundation in the middle. The multiple positioning balls 401 can rotate due to friction, so as to achieve vertical anti-wear guidance for the pile foundation while clamping and positioning. This achieves the effect of clamping and anti-wear positioning when the pile foundation is lowered into the positioning support pipe 1. In addition, the clamping and positioning spacing can be adjusted by the two arc-shaped clamps 4, which is convenient for anti-wear positioning guidance for pile foundations of various specifications and improves applicability.

[0042] After use, pulling the handle 203 in the opposite direction causes the internal gear ring 202 to rotate in the opposite direction. Similarly, the movement direction is completely opposite to the forward rotation of the internal gear ring 202. At this time, the lifting sleeve 3 changes to moving upward and is pulled by the four connecting rods 301 to drive the four expansion support plates 104 to rotate upward and fold to the outside of the positioning support tube 1. This achieves the effect of folding the four expansion support plates 104 in one piece after use, reducing the area occupied when not in use or during transportation, bringing convenience to transportation work and improving the flexibility of use.

[0043] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pile positioning device for collapsible loess foundations, comprising a positioning branch pipe (1), characterized in that: include: The positioning branch pipe (1) has a base plate (101) fixedly fitted on its outer bottom; The expansion support plate (104) consists of four sets, which are rotatably installed on the four sides of the base plate (101). The two adjacent expansion support plates (104) are provided with grooves, and the tops of the opposing sides of the two adjacent expansion support plates (104) are provided with an uneven structure. The linkage thread lifting drive assembly is installed on the positioning branch pipe (1). The bottom four sides are rotatably installed with inclined connecting rods (301). The bottom end of the connecting rod (301) is rotatably installed in the corresponding groove. The two connecting rods (301) are symmetrically arranged. The clamp anti-wear positioning component consists of two sets installed inside the positioning branch pipe (1).

2. The pile positioning device for collapsible loess foundation according to claim 1, characterized in that: The linkage threaded lifting drive assembly includes a lifting sleeve (3) slidably sleeved on the outside of the positioning branch pipe (1). Slide grooves (105) are provided on both sides of the positioning branch pipe (1). A first screw (2) is rotatably installed between the top inner wall and the bottom inner wall of each of the two slide grooves (105). A lifting seat (204) is threaded onto the first screw (2). Two lifting seats (204) are fixedly connected to the inner walls of both sides of the lifting sleeve (3). A gear (201) is fixedly sleeved on the first screw (2) above the corresponding lifting seat (204). Two gears (201) mesh on opposite sides with an internal gear ring (202) that is rotatably sleeved on the outside of the positioning branch pipe (1). The bottom of the internal gear ring (202) is in contact with the top of the lifting sleeve (3). Multiple handles (203) are fixedly connected in a ring at equal intervals on the outside of the internal gear ring (202). The bottom of the lifting sleeve (3) and the top of the base plate (101) are fixedly connected with a telescopic protective rubber sleeve (303) that is rotatably sleeved on the outside of the positioning branch pipe (1). The connecting rod (301) is rotatably installed at the bottom of the lifting sleeve (3).

3. The pile positioning device for collapsible loess foundation according to claim 1, characterized in that: The clamp anti-wear positioning component includes an arc-shaped clamp (4), with two arc-shaped clamps (4) arranged symmetrically. Three positioning balls (401) are vertically and equidistantly embedded on the inner wall of the opposing side, the front inner wall, and the rear inner wall of the two arc-shaped clamps (4). T-shaped screws (403) are rotatably installed on the opposing side of the two arc-shaped clamps (4). The positioning branch pipe (1) is threaded onto the two T-shaped screws (403). Four horizontal guide rods (402) are fixedly connected in a rectangle on the opposing side of the two arc-shaped clamps (4). The positioning branch pipe (1) is slidably sleeved on the eight horizontal guide rods (402).

4. A pile positioning device for collapsible loess foundation according to claim 1, characterized in that: The base plate (101) has rectangular grooves with open tops and bottoms on all four sides. A first support shaft (102) is welded and fixed between the inner walls of the two sides of the rectangular groove. The top and bottom of the expansion support plate (104) are both set as arc-shaped structures. A first round hole is opened on the bottom of one side of the expansion support plate (104). Two first bearings are fixedly fitted in the first round hole. The inner ring of the first bearing is fixedly fitted with the outer side of the corresponding first support shaft (102).

5. A pile positioning device for collapsible loess foundation according to claim 2, characterized in that: The lifting sleeve (3) has four sides with an open bottom for mounting grooves. The inner walls of the mounting grooves and the inner walls of the grooves are fixedly connected to the second support shafts (302). The top and bottom of one side of the connecting rod (301) are provided with second round holes. Two second bearings are fixedly fitted in the second round holes. The inner rings of the second bearings are fixedly fitted to the outer sides of the corresponding second support shafts (302).

6. A pile positioning device for collapsible loess foundation according to claim 2, characterized in that: The top of the lifting seat (204) is provided with a first threaded hole that is threadedly connected to the corresponding first screw (2).

7. A pile positioning device for collapsible loess foundation according to claim 3, characterized in that: The positioning branch pipe (1) has a second threaded hole on both sides of its inner wall, and the second threaded hole is threadedly connected to the corresponding T-shaped screw (403).

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