Building pile foundation and construction method

Abstract

The present invention discloses a building pile foundation, comprising a prefabricated pile and a plurality of anchor bars arranged on the top of the prefabricated pile, wherein the prefabricated pile is composed of a plurality of pile sections, and a bidirectional sleeve sleeved on the pile body is arranged between each two adjacent pile sections, and a sleeve pipe that can be bent outward is arranged in the middle of the bidirectional sleeve. The present invention also discloses a construction method of the building pile foundation. The building pile foundation can ensure the verticality of the pile body, and also strengthen and tighten the strength of the variable cross-section of the pile foundation and the bearing capacity of the pile foundation.

Description

Technical Field

[0001] The invention relates to a building pile foundation and also to a construction method of the building pile foundation. Background Art

[0002] At present, the construction of precast piles for building pile foundations is generally to drill pile holes on compacted soil and then insert precast piles into the pile holes. The cross-section of this type of building pile foundation is uniform without variable cross-section, and the strength and bearing capacity of the pile foundation are limited. Summary of the invention

[0003] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a building pile foundation which ensures the verticality of the pile body and strengthens and tightens the strength of the variable cross-section of the pile foundation and the bearing capacity of the pile foundation.

[0004] To this end, the present invention is implemented by adopting the following technical solutions:

[0005] The building pile foundation comprises a precast pile and a plurality of anchor bars arranged on the top of the precast pile, wherein the precast pile is composed of a plurality of pile sections, and a bidirectional sleeve sleeved on the pile body is arranged between each two adjacent pile sections, and a sleeve which can be bent outward is arranged in the middle of the bidirectional sleeve.

[0006] Furthermore, the sleeve in the middle of the bidirectional sleeve includes an upper sleeve and a lower sleeve, the upper sleeve and the lower sleeve are connected by a thin plate, and a cavity is surrounded by the upper sleeve and the lower sleeve.

[0007] Furthermore, a through hole communicating with the cavity is provided at the bottom of the upward-facing sleeve of the bidirectional sleeve, and high-strength cement mortar can be poured into the cavity through the through hole.

[0008] Furthermore, a plurality of first flow channels communicating with the outside are provided at the lower portion of the upward-facing sleeve of the bidirectional sleeve.

[0009] Furthermore, the inner wall of the upper sleeve is provided with a plurality of first annular blocks at equal intervals, and the inner wall of the lower sleeve is provided with a plurality of second annular blocks at equal intervals. When the upper sleeve and the lower sleeve are bent outward to overlap, the first annular blocks and the second annular blocks are cross-connected with each other.

[0010] Furthermore, the first annular clamping block and the second annular clamping block are both penetrated by a second flow channel, and when the upper sleeve and the lower sleeve are bent outwards to overlap each other, all the second flow channels are connected.

[0011] Furthermore, the upper ends of the first annular clamping block and the second annular clamping block are both arc-shaped.

[0012] Furthermore, the opposite ends of the upper sleeve and the lower sleeve are arc-shaped.

[0013] After adopting the above technical scheme, the thin plate of the bidirectional sleeve breaks first after being compressed, and then the upper sleeve and the lower sleeve slowly bend outward. In the above process, the high-strength cement mortar is squeezed into the nearby compacted soil through the first flow channel and the second flow channel under pressure, and forms a whole with the compacted soil. When the upper sleeve and the lower sleeve are bent outward and overlapped, the first annular block and the second annular block are cross-connected with each other to prevent the pile body from lateral displacement, thereby ensuring the verticality of the pile foundation, and at the same time strengthening and tightening the strength of the variable cross-section of the pile foundation and the bearing capacity of the pile foundation.

[0014] The present invention also provides a construction method for a building pile foundation, which is characterized by comprising the following steps:

[0015] Step 1: Drill pile holes in the compacted soil;

[0016] Step 2: Sleeve the lower sleeve of the bidirectional sleeve onto the first section of the pile body and put it into the pile hole;

[0017] Step 3: pouring high-strength cement mortar into the cavity through the through hole;

[0018] Step 4: insert the second section of the pile into the upper sleeve of the first bidirectional sleeve, apply pressure to the second section of the pile, and the thin plate of the bidirectional sleeve will first break after being pressed, and then the upper sleeve and the lower sleeve will slowly bend outwards. During the above process, the high-strength cement mortar is pressed through the first flow channel and the second flow channel and squeezed into the compacted soil nearby, and forms a whole with the compacted soil. When the upper sleeve and the lower sleeve are bent outwards and overlapped, stop applying pressure to the second section of the pile, and at this time, the first annular clamping block and the second annular clamping block are cross-connected with each other;

[0019] Step 5: After the high-strength cement mortar cools down, repeat steps 2 to 4 to construct the subsequent piles until all the piles are constructed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention has the following accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the prefabricated pile after construction of the present invention;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 It is a schematic diagram of the structure of the sleeve in the present invention.

[0024] Figure numerals: 1. anchor bar; 2. pile body; 3. bidirectional sleeve; 4. upper casing; 5. lower casing; 6. thin plate; 7. cavity; 8. through hole; 9. first flow channel; 10. first annular block; 11. second annular block; 12. second flow channel; 13. compacted soil. DETAILED DESCRIPTION

[0025] Referring to the above-mentioned drawings, the building pile foundation provided by the present invention includes a precast pile and a plurality of anchor bars 1 arranged on the top of the precast pile, wherein the precast pile is composed of a plurality of pile bodies 2, and a bidirectional sleeve 3 sleeved on the pile body 2 is arranged between each two adjacent pile bodies 2, a sleeve that can be bent outward is arranged in the middle of the bidirectional sleeve 3, the sleeve in the middle of the bidirectional sleeve 3 includes an upper sleeve 4 and a lower sleeve 5, the upper sleeve 4 and the lower sleeve 5 are connected by a thin plate 6, and a cavity 7 is formed between the upper sleeve 4 and the lower sleeve 5, the bottom of the upward sleeve of the bidirectional sleeve 3 is provided with a through hole 8 communicating with the cavity 7, high-strength cement mortar can be poured into the cavity 7 through the through hole 8, and the sleeve upward of the bidirectional sleeve 3 is provided with a through hole 8 communicating with the cavity 7. The lower part is provided with a plurality of first flow channels 9 connected to the outside, the inner wall of the upper sleeve 4 is provided with a plurality of first annular blocks 10 at equal intervals, and the inner wall of the lower sleeve 5 is provided with a plurality of second annular blocks 11 at equal intervals. When the upper sleeve 4 and the lower sleeve 5 are bent outwards to be stacked together, the first annular blocks 10 and the second annular blocks 11 are cross-connected with each other, and the first annular blocks 10 and the second annular blocks 11 are both penetrated by second flow channels 12. When the upper sleeve 4 and the lower sleeve 5 are bent outwards to be stacked together, all the second flow channels 12 are communicated, and the upper ends of the first annular blocks 10 and the second annular blocks 11 are both arc-shaped, and the opposite ends of the upper sleeve 4 and the lower sleeve 5 are arc-shaped.

[0026] In this embodiment, after the bidirectional sleeve 3 is compressed, the thin plate 6 first breaks, and then the upper sleeve 4 and the lower sleeve 5 slowly bend outward. During the above process, the high-strength cement mortar is compressed and squeezed into the nearby compacted soil through the first flow channel 9 and the second flow channel 12, and forms a whole with the compacted soil. When the upper sleeve 4 and the lower sleeve 5 are bent outward and overlapped, the first annular block 10 and the second annular block 11 are cross-connected with each other to prevent the pile body 2 from lateral displacement, thereby ensuring the verticality of the pile foundation and, at the same time, strengthening and tightening the strength of the variable cross-section of the pile foundation and the bearing capacity of the pile foundation.

[0027] The present invention also provides a construction method for a building pile foundation, which is characterized by comprising the following steps:

[0028] Step 1: drilling pile holes in the compacted soil 13;

[0029] Step 2: Sleeve the lower sleeve of the bidirectional sleeve 3 onto the first section of the pile body 2 and put it into the pile hole;

[0030] Step 3: pouring high-strength cement mortar into the cavity 7 through the through hole 8;

[0031] Step 4: insert the second section of the pile body 2 into the upper sleeve of the first bidirectional sleeve 3, apply pressure to the second section of the pile body 2, and the thin plate 6 of the bidirectional sleeve 3 will first break after being pressed, and then the upper sleeve 4 and the lower sleeve 5 will slowly bend outwards. During the above process, the high-strength cement mortar is pressed through the first flow channel 9 and the second flow channel 12 to be squeezed into the compacted soil 13 nearby, and form a whole with the compacted soil 13. When the upper sleeve 4 and the lower sleeve 5 are bent outwards and overlapped, stop applying pressure to the second section of the pile body 2, and at this time, the first annular block 10 and the second annular block 11 are cross-connected with each other;

[0032] Step 5: After the high-strength cement mortar cools down, repeat steps 2 to 4 to construct the subsequent pile bodies 2 until all the pile bodies 2 are constructed.

Claims

1. Building pile foundation, including precast piles and multiple anchor bars on the top of the precast piles, Its characteristics are: The prefabricated pile is composed of a plurality of pile bodies, and a two-way sleeve is provided between each two adjacent pile bodies, the middle part of the two-way sleeve is provided with a sleeve that can be bent outward, the bottom of the upward sleeve of the two-way sleeve is provided with a through hole communicating with the cavity, and high-strength cement mortar can be poured into the cavity through the through hole, and the lower part of the upward sleeve of the two-way sleeve is provided with a plurality of first flow channels communicating with the outside world, the inner wall of the upper sleeve is provided with a plurality of first annular blocks at equal intervals, and the inner wall of the lower sleeve is provided with a plurality of second annular blocks at equal intervals, and when the upper sleeve and the lower sleeve are bent outwards and stacked together, the first annular blocks and the second annular blocks are cross-connected with each other.

2. The building pile foundation according to claim 1, Its characteristics are: The sleeve in the middle of the bidirectional sleeve comprises an upper sleeve and a lower sleeve, the upper sleeve and the lower sleeve are connected by a thin plate, and a cavity is formed between the upper sleeve and the lower sleeve.

3. The building pile foundation according to claim 2, Its characteristics are: The first annular clamping block and the second annular clamping block are both penetrated by a second flow channel, and when the upper sleeve and the lower sleeve are bent outwards to overlap each other, all the second flow channels are connected.

4. The building pile foundation according to claim 2, Its characteristics are: The upper ends of the first annular clamping block and the second annular clamping block are both arc-shaped.

5. The building pile foundation according to claim 1 or 2, Its characteristics are: The ends of the upper sleeve and the lower sleeve opposite to each other are in arc shape.

6. A construction method for a building pile foundation according to claim 1, Its characteristics are: The following steps are involved: Step 1: Drill pile holes in the compacted soil; Step 2: Sleeve the lower sleeve of the bidirectional sleeve onto the first section of the pile body and put it into the pile hole; Step 3: pouring high-strength cement mortar into the cavity through the through hole; Step 4: insert the second section of the pile into the upper sleeve of the first bidirectional sleeve, apply pressure to the second section of the pile, and the thin plate of the bidirectional sleeve will first break after being pressed, and then the upper sleeve and the lower sleeve will slowly bend outwards. During the above process, the high-strength cement mortar is pressed through the first flow channel and the second flow channel and squeezed into the compacted soil nearby, and forms a whole with the compacted soil. When the upper sleeve and the lower sleeve are bent outwards and overlapped, stop applying pressure to the second section of the pile, and at this time, the first annular clamping block and the second annular clamping block are cross-connected with each other; Step 5: After the high-strength cement mortar cools down, repeat steps 2 to 4 to construct the subsequent piles until all the piles are constructed.

Images