A construction method for using retaining partition piles as engineering piles

Abstract

The present application relates to the field of building construction, and discloses a construction method for using retaining partition piles as engineering piles, which includes the following steps: S1: partitioning the foundation pit; S2: injecting partition piles; S3: determining the construction batch; S4: earth excavation and basement construction, after the excavation of the first batch of excavation areas is completed, a first bottom plate is set at the bottom of the first batch of excavation areas, and a basement is constructed on the first bottom plate to ±0, and the excavation of the adjacent second batch of excavation areas begins, and a second bottom plate is set at the bottom of the second batch of excavation areas, and a basement is constructed on the second bottom plate to ±0; S5: breaking the partition piles, breaking the partition piles between the adjacent foundation pits constructed in two batches to the bottom of the first bottom plate; S6: connecting the bottom plates, setting a third bottom plate between the first bottom plate and the second bottom plate, and fixing the remaining partition piles after breaking in the third bottom plate and becoming pull-out resistant engineering piles. The present application has the function of making the partition piles a permanent and temporary combined structure, reusing the partition piles, and reducing the construction cost of the project.

Description

Technical Field

[0001] The present application relates to the field of building construction, and in particular to a construction method for using retaining partition piles as engineering piles. Background Art

[0002] With the rapid economic development of my country and the accelerating urbanization process, there is an increasing number of development and construction projects, such as commercial complexes. This has led to the increasing prevalence of deep foundation pit projects. To reduce the impact of foundation pit construction on the surrounding environment, most underground construction in complexes is now carried out using multiple foundation pits in separate compartments. The retaining structures separating multiple foundation pits often use underground continuous walls or bored cast-in-place piles. These retaining structures are generally temporary and must be removed after the underground structure is completed and the earth is backfilled. This results in the foundation pit support structures being left idle and wasted for long periods of time during the construction of the building. However, the cost of retaining structures is generally high, so exploring how to permanently utilize the retaining piles for foundation pits has become a major challenge facing the construction industry.

[0003] To this end, the inventor provides a construction method for using retaining partition piles as engineering piles. Summary of the Invention

[0004] In order to better utilize the retaining piles and improve the convenience of using the retaining piles, the present application provides a construction method for using retaining separation piles as engineering piles.

[0005] The construction method of a retaining partition pile used as an engineering pile provided in this application adopts the following technical solution:

[0006] A construction method for using retaining partition piles as engineering piles comprises the following steps:

[0007] S1: Partitioning of foundation pits: the horizontal range of the foundation pit is divided into multiple areas, with dividing lines formed between adjacent areas; S2: Driving dividing piles: driving dividing piles along the dividing lines; S3: Determining construction batches: dividing multiple foundation pits into the first batch excavation area and the second batch excavation area according to the skipping principle; S4: Earth excavation and basement construction: the excavation of the first batch excavation area is completed, the first bottom plate is set at the bottom of the first batch excavation area, and the basement is constructed on the first bottom plate to ±0, the excavation of the adjacent second batch excavation area begins, and the second bottom plate is set at the bottom of the second batch excavation area, and the basement is constructed on the second bottom plate to ±0; S5: Removing dividing piles: removing the dividing piles between adjacent foundation pits constructed in two batches to the bottom of the first bottom plate; S6: The bottom plates are connected: a third bottom plate is set between the first bottom plate and the second floor plate, and the remaining dividing piles after removal are fixed in the third bottom plate and become pull-out engineering piles.

[0008] By adopting the above technical solution, the foundation pit is divided into multiple areas, and the multiple areas are divided into the first batch excavation area and the second batch excavation area. The areas within the first batch excavation area and the second batch excavation area are set at intervals. The first batch excavation area is constructed first, and after the construction reaches the ground level, the second batch excavation area is constructed. This can reduce the lateral earth pressure on the foundation pit retaining structure during large-scale construction and improve the stability of the excavation area construction. The separating piles are then removed, and anti-pullout engineering piles remain at the bottom of the excavation area, and the anti-pullout engineering piles are fixed on the third bottom plate, thereby realizing the conversion of temporary separating piles into permanent anti-pullout engineering piles. With such a design, it can serve as a retaining and dividing role during earth excavation, improve the convenience of using separating piles, and serve as an anti-pullout structure after the bottom plate is closed, thereby improving the utilization rate of separating piles and improving the safety of construction in the excavation area.

[0009] Preferably, the partition pile is formed by casting a first steel bar and concrete, the partition pile is broken and the remaining first steel bar is on the top of the pull-out resistant engineering pile, the third base plate is composed of a second steel bar and concrete, and the second steel bar in the third base plate is fixedly connected to the first steel bar.

[0010] By adopting the above technical solution, the first steel bar is fixedly connected to the second steel bar and fixed by pouring concrete, so that the third base plate can be more firmly fixedly connected to the pull-out engineering piles, thereby improving the stability of the third base plate.

[0011] Preferably, a waterproof rubber strip is wrapped around the first steel bar on the anti-pullout engineering pile.

[0012] By adopting the above technical solution, it is possible to reduce the water in the third bottom plate from penetrating into the third bottom plate through the first steel bar and affecting the waterproof effect of the third bottom plate, thereby improving the convenience of using the third bottom plate.

[0013] Preferably, water-stop steel plates are provided on both sides of the third bottom plate and between the first bottom plate and the second bottom plate, and water retaining plates are provided on both sides of the water-stop steel plates, and the water retaining plates are extended downward.

[0014] By adopting the above technical solution, the waterstop steel plate can play a role of passive waterproofing, reduce water leakage at the connection between the third bottom plate and the first bottom plate and the second bottom plate, and improve the waterproofness of the third bottom plate.

[0015] Preferably, the weight of the third base plate is increased by thickening it and / or adding a counterweight.

[0016] By adopting the above technical solution and increasing the weight of the third bottom plate, the buoyancy of the third bottom plate exerted by the groundwater can be better balanced, thereby improving the stability of the third bottom plate.

[0017] Preferably, the first bottom plate and the second bottom plate are both composed of third steel bars and concrete, the third steel bars are extended toward the side wall of the first bottom plate or the second bottom plate, and the third steel bars are fixedly connected to the second steel bars.

[0018] By adopting the above technical solution, the first base plate can be connected more firmly to the second base plate and the third base plate, thereby improving the firmness of the fixation of the first base plate, the second base plate and the third base plate and improving the safety of construction.

[0019] Preferably, a plurality of positioning blocks are provided on both sides of the first base plate and the second base plate where they are close to each other, and the plurality of positioning blocks are arranged in a one-to-one correspondence. Positioning grooves are provided on both sides of the two positioning blocks where they are close to each other, and a support component is provided between the two positioning blocks and is plugged into the positioning grooves.

[0020] By adopting the above technical solution, the first base plate and the second floor can be fixed more firmly using the support assembly, and then combined with the third base plate, the third base plate can be fixed more firmly between the first base plate and the second base plate, thereby improving the firmness of the third base plate.

[0021] Preferably, the support assembly includes a support block inserted into the positioning groove, a thread groove is provided on the side of the support block away from the positioning block, a rotating screw is provided between the two support blocks, and the rotating screw is threadably connected to the thread groove.

[0022] By adopting the above technical solution, the first base plate and the second base plate can be supported more conveniently, the firmness of the connection between the first base plate and the second base plate can be improved, and the firmness of the connection between the rotating screw and the first base plate and the second base plate can be ensured, so that the third base plate can be fixed more firmly.

[0023] Preferably, the rotating screw rod is provided with a plurality of insertion holes along its radial direction, and the second steel bar is inserted into the insertion holes.

[0024] By adopting the above technical solution, the rotating screw and the second steel bar can be fixed more firmly, thereby improving the firmness of the fixation of the third base plate.

[0025] Preferably, the rotating screw is arranged on the upper side of the anti-pullout engineering pile, and the first steel bar is inserted into the insertion hole.

[0026] By adopting the above technical solution, the pull-out engineering pile can be more firmly connected to the rotating screw rod, thereby improving the firmness of the connection between the pull rod and the third base plate.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Removing some of the separation piles and forming anti-pullout piles can, on the one hand, fully utilize the separation piles and improve their convenience. On the other hand, fixing the anti-pullout piles to the third bottom plate can reduce the pressure on the first, second, and third bottom plates at the bottom of the excavation area. The tension of the anti-pullout piles and the buoyancy of the third bottom plate are balanced, thereby improving the safety of construction in the excavation area.

[0029] 2. The first steel bar is fixedly connected to the second steel bar and fixed with concrete pouring, so that the third base plate can be more firmly connected to the anti-pulling engineering piles, thereby improving the stability of the third base plate;

[0030] 3. The waterproof strips and / or water-stop steel plates can better play a waterproof role, reduce water leakage at the third bottom plate, and improve the waterproofness of the third bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a construction flow chart of a construction method for using a retaining partition pile as an engineering pile in Example 1 of the present application.

[0032] Figure 2 This is a foundation pit division diagram of a construction method in which retaining partition piles are used as engineering piles in Example 1 of the present application.

[0033] Figure 3 This is a cross-sectional view of a construction method of using a retaining partition pile as an engineering pile in Example 1 of the present application.

[0034] Figure 4 This is a cross-sectional view of a construction method of a retaining partition pile used as an engineering pile in Example 2 of the present application.

[0035] Figure numerals: 1. First batch of excavation area; 2. Second batch of excavation area; 3. Second steel bar; 4. Separation pile; 5. Third bottom plate; 6. Third steel bar; 7. Second bottom plate; 8. First steel bar; 9. Pull-out engineering pile; 10. Positioning block; 11. Support block; 12. Rotating screw; 13. Connecting hole; 14. First bottom plate; 15. Water retaining plate; 16. Dividing line; 17. Waterproof rubber strip; 18. Waterstop steel plate; 19. Positioning groove. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1 —4 provides further details of this application.

[0037] The embodiments of the present application disclose a construction method for using retaining partition piles as engineering piles.

[0038] Example 1:

[0039] Reference Figure 2 and Figure 3A construction method for using retaining partition piles as engineering piles comprises the following steps:

[0040] S1: pit partitioning, which divides the horizontal range of the pit into multiple areas. Each area is approximately rectangular in shape, and a dividing line 16 is formed between adjacent areas.

[0041] S2: Driving the partition piles 4, and driving the partition piles 4 at intervals along the dividing line 16, thereby dividing the foundation pit into multiple small foundation pits;

[0042] S3: Determine the construction batches. Multiple foundation pits are divided into the first batch excavation area 1 and the second batch excavation area 2 according to the skipping principle. During construction, the first batch excavation area 1 is constructed first, and then the second batch excavation area 2 is constructed. This design can reduce the lateral earth pressure on the foundation pit retaining structure during large-scale construction and improve the stability of the excavation area construction;

[0043] S4: Construction excavation. After the excavation of the first batch of excavation area 1 is completed, a first bottom plate 14 is fixed at the bottom of the first batch of excavation area 1, and the upper side of the first bottom plate 14 is constructed to the ground level, so that the first batch of excavation area 1 can complete the preliminary processing. The first batch of excavation area 1 is constructed to ±0 for the basement, and the second batch of excavation area 2 is excavated. The second bottom plate 7 is fixed at the bottom of the adjacent second batch of excavation area 2, and the basement is constructed on the second bottom plate 7 to ±0. With this design, the effect of step-by-step excavation can be achieved. After the first batch of excavation area 1 is processed to ±0, the lateral earth pressure of the foundation pit retaining structure can be reduced, thereby improving the stability of multi-area excavation;

[0044] S5: Breaking down the partition piles 4. Use tools to break down the partition piles 4 between the adjacent foundation pits constructed in two batches to the bottom of the first bottom plate 14.

[0045] S6: The bottom plates are connected, and a third bottom plate 5 is fixed between the first bottom plate 14 and the second bottom plate 7. After the separation piles 4 are broken, they are fixed in the third bottom plate and form pull-out piles 9, thereby fixing the third bottom plate 5. Through such a design, the separation piles 4 can be more fully utilized, the convenience of using the separation piles 4 is improved, and the purpose of fixing the third bottom plate 5 can be achieved, the convenience of using permanent pull-out columns 9 is improved, and the application of the separation piles 4 is improved; since the third bottom plate 5 is located below the ground and there is groundwater below the ground, the third bottom plate 5 will be affected by the buoyancy of the groundwater, and the sealing of the third bottom plate 5 is also a problem that needs to be paid attention to during underground construction. The remaining pull-out piles 9 are fixed on the third bottom plate 5, so that the pull-out piles 9 can balance the buoyancy of the groundwater on the third bottom plate 5, thereby improving the stability of the fixation of the third bottom plate 5.

[0046] The partition pile 4 is formed by pouring the first steel bar 8 and concrete. When making the partition pile 4, the first steel bar 8 is used to surround the steel cage, and the steel cage is placed in the excavated pit. Then, concrete is poured in to cooperate with the first steel bar 8 to make the partition pile 4, and then the concrete is mixed and dried to complete the production of the partition pile 4. The partition pile 4 with such a design can be more fully in contact with the soil, thereby improving the stability of the partition pile 4 during use.

[0047] The separation pile 4 is removed and the remaining first steel bar 8 is placed on top of the pull-out engineering pile 9. The pull-out engineering pile 9 is directly cast, which can be more fully fixed to the bottom of the foundation pit and improve the stability of the pull-out engineering pile 9. The third bottom plate 5 is composed of the second steel bar 3 and concrete. The second steel bar 3 and the first steel bar 8 on the pull-out engineering pile 9 are fixed by welding or binding with steel wire. After the first steel bar 8 and the second steel bar 3 are fixed, concrete is poured to form the third bottom plate 5. The weight of the third bottom plate 5 is increased by thickening and / or adding counterweights. During normal construction, the thickness of the third bottom plate 5 is between 600 and 800 mm. In order to increase the weight of the third bottom plate 5, the thickness of the third floor is increased to between 1300 and 1400 mm. The weight of the third bottom plate 5 can be increased by increasing the number of second steel bars 3, thereby balancing the buoyancy of the groundwater and improving the stability of the third floor. A waterproof rubber strip 17 is wrapped around the first steel bar 8 at the top of the pull-out engineering pile 9. The waterproof rubber strip 17 is made of rubber material and will expand when it comes into contact with water, reducing the flow of groundwater along the first steel bar 8 into the third bottom plate 5, affecting the waterproofness of the underground construction, and improving the stability of the underground construction.

[0048] The first bottom plate 14 and the second bottom plate 7 are both composed of the third steel bar 6 and concrete. The third steel bar 6 is extended to the side wall of the first bottom plate 14 or the second bottom plate 7, and the third steel bar 6 is welded and fixed to the second steel bar 3 or fixed with a steel wire, so that the connection between the first bottom plate 14, the second bottom plate 7 and the third bottom plate 5 can be more firmly connected, thereby improving the stability of using the third bottom plate 5.

[0049] The implementation principle of the construction method of using a retaining partition pile as an engineering pile in Example 1 of the present application is as follows: during work, the staff divides the foundation pit into multiple areas, and divides the multiple areas into the first batch excavation area 1 and the second batch excavation area 2. After the first batch excavation area 1 is excavated and constructed to ±0, the second batch excavation area 2 is excavated and constructed to ±0. Then, the partition piles 4 on the first bottom plate 14 are cleaned, and the third bottom plate 5 is made, so that the pull-out engineering piles 9 are fixed on the third bottom plate 5. With such a design, on the one hand, the partition piles 4 can be fully utilized, and the convenience of using the partition piles 4 is improved. On the other hand, the pull-out engineering piles 9 are fixed to the third bottom plate 5, which can reduce the pressure on the first bottom plate 14, the second bottom plate 7 and the third bottom plate 5 at the bottom of the excavation area. The tension of the pull-out engineering piles 9 and the buoyancy of the third bottom plate 5 are balanced, thereby improving the stability of construction in the excavation area.

[0050] Example 2:

[0051] Reference Figure 4 , a construction method of a retaining partition pile used as an engineering pile, which is different from Example 1 in that a rectangular water-stop steel plate 18 is fixed between the first base plate 14 and the second base plate 7 on both sides of the third base plate 5, and a water retaining plate 15 is integrally formed on both sides of the water-stop steel plate 18. The water retaining plate 15 extends downward in a direction away from the water-stop steel plate 18, so that the water-stop steel plate 18 can play a passive waterproof role, reduce groundwater leakage from the third base plate 5, and improve the waterproofness of the third base plate 5.

[0052] Multiple positioning blocks 10 are provided on both sides of the first and second base plates 14, 7, where they meet. These blocks 10 are welded to the third reinforcement bars 6 and secured with concrete. The positioning blocks 10 on the first and second base plates 14, 7, are arranged in a one-to-one correspondence. Positioning slots 19 are defined on both sides of the two positioning blocks 10 where they meet. A support assembly is secured between the two corresponding positioning blocks 10, plugging into the slots 19.

[0053] The support assembly includes a support block 11 inserted into a positioning groove 19. The positioning groove 19 is a rectangular groove, and the support block 11 is a rectangular block. This design allows the support block 11 to be more stably fixed, thereby improving the stability of the fixation of the support block 11. A threaded groove is provided on the side of the support block 11 away from the positioning block 10. A rotating screw 12 is installed between the two support blocks 11. The rotating screw 12 is threadedly connected to the threaded groove. The rotating screw 12 is threadedly connected to the threaded groove, thereby achieving a connection between the first base plate 14 and the second base plate 7. The rotating screw 12 is provided with a plurality of plug holes 13 along its radial direction. The second steel bar 3 is plugged into the plug holes 13, thereby achieving a connection between the third base plate 5 and the rotating screw 12, thereby improving the firmness of the fixation of the third base plate 5. In order to improve the firmness of the connection between the pull-out engineering pile 9 and the third base plate 5, the rotating screw 12 is fixed to the upper side of the pull-out engineering pile 9, and the first steel bar 8 is inserted into the insertion hole 13, thereby realizing the connection between the pull-out engineering pile 9 and the rotating rod, and improving the stability of the use of the pull-out engineering pile 9.

[0054] The implementation principle of the construction method of a retaining partition pile used as an engineering pile in Example 1 of the present application is: the difference from the embodiment is that by rotating the screw 12 in conjunction with the positioning block 10, the first base plate 14 and the second base plate 7 can be connected more firmly, and then in conjunction with the plug hole 13 and the first steel bar 8 and the second steel bar 3, the screw 12 can be rotated to be fixed more firmly on the third base plate 5, thereby improving the stability of the fixation of the third base plate 5.

[0055] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A construction method for using retaining partition piles as engineering piles, characterized in that: The steps include: S1: foundation pit partitioning, which divides the horizontal range of the foundation pit into multiple areas, with separation lines (16) forming between adjacent areas; S2: Driving separation piles (4), driving separation piles (4) along the separation line (16) to divide the foundation pit into multiple small foundation pits; S3: Determine the construction batches and divide the multiple foundation pits into the first batch excavation area (1) and the second batch excavation area (2) according to the skipping principle; S4: earthwork excavation and basement construction. The excavation of the first batch excavation area (1) is completed. A first bottom plate (14) is set at the bottom of the first batch excavation area (1) and a basement is constructed on the first bottom plate (14) to ±0. The excavation of the adjacent second batch excavation area (2) begins. A second bottom plate (7) is set at the bottom of the second batch excavation area (2) and a basement is constructed on the second bottom plate (7) to ±0. S5: Breaking down the partition piles (4), breaking down the partition piles (4) between the adjacent foundation pits constructed in two batches to the bottom of the first bottom plate (14); S6: The bottom plates are connected, and a third bottom plate (5) is provided between the first bottom plate (14) and the second bottom plate (7). After the separation piles (4) are broken, they are fixed in the third bottom plate (5) and become pull-out-resistant engineering piles (9); The partition pile (4) is formed by casting a first steel bar (8) with concrete, the partition pile (4) is broken and the remaining first steel bar (8) is placed on the top of the pull-out resistant engineering pile (9), the third bottom plate (5) is composed of a second steel bar (3) and concrete, and the second steel bar (3) in the third bottom plate (5) is fixedly connected to the first steel bar (8); The first bottom plate (14) and the second bottom plate (7) are both composed of a third steel bar (6) and concrete, the third steel bar (6) is extended to the side wall of the first bottom plate (14) or the second bottom plate (7), and the third steel bar (6) is fixedly connected to the second steel bar (3); a plurality of positioning blocks (10) are provided on both sides of the first bottom plate (14) and the second bottom plate (7) close to each other, the plurality of positioning blocks (10) are arranged in a one-to-one correspondence, a positioning groove (19) is provided on both sides of the two positioning blocks (10) close to each other, and a support component is provided between the two positioning blocks (10) and is plugged into the positioning groove (19); The support assembly comprises a support block (11) inserted into the positioning groove (19), a thread groove is provided on a side of the support block (11) away from the positioning block (10), a rotating screw (12) is provided between the two support blocks (11), and the rotating screw (12) is threadedly connected to the thread groove; The rotating screw (12) is provided with a plurality of insertion holes (13) along its radial direction, and the second steel bar (3) is inserted into the insertion holes (13); the rotating screw (12) is arranged on the upper side of the anti-pulling engineering pile (9), and the first steel bar (8) is inserted into the insertion holes (13).

2. The construction method of using a retaining partition pile as an engineering pile according to claim 1, characterized in that: A waterproof rubber strip (17) is wound around the first steel bar (8) on the anti-pulling engineering pile (9).

3. The construction method of using a retaining partition pile as an engineering pile according to claim 1, characterized in that: Water-stop steel plates (18) are provided between the first bottom plate (14) and the second bottom plate (7) on both sides of the third bottom plate (5), and water retaining plates (15) are provided on both sides of the water-stop steel plates (18), and the water retaining plates (15) are extended downward.

4. The construction method of using a retaining partition pile as an engineering pile according to claim 1, characterized in that: The weight of the third base plate (5) is increased by thickening and / or adding a counterweight.

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