Multi-story basement phased construction with shared support piles and basement connection construction method

Abstract

The present invention discloses a method for sharing support piles for phased construction of a multi-story basement and connecting the basement. The method comprises the following steps: S10: construction preparation; S20: construction of the foundation pit support pile structure; S30: construction of the basement structure in sections; S40: re-topping the beam and slab; S50: removing the support piles; S60: pouring concrete at the connection; S70: curing the concrete; S80: repeating steps S40: re-topping the beam and slab to S70: curing the concrete; that is, repeating the steps of re-topping the structure, removing the support piles, pouring concrete at the connection, curing the concrete, and connecting the basement layers until the construction is completed. The beneficial effect of the present invention is that the method can reduce costs and shorten construction period by sharing support piles from adjacent completed construction sites and connecting with the basement.

Description

Technical Field

[0001] The present invention relates to the field of construction, and in particular to a method for sharing supporting piles for phased construction of a multi-story basement and connecting the basements. Background Art

[0002] Traditional construction techniques, which involve pit support, excavation, foundation work, and main structure construction, are not only time-consuming and costly, but also particularly challenging in urban core areas with limited site space. However, sharing unused support piles in adjacent completed projects can further reduce construction space and costs. The connecting area can be constructed during the basement construction phase without disrupting the basement structure. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the present invention provides a construction method for multi-story basements in phased construction, which uses shared support piles and connects them to the basement. This method can reduce costs and shorten construction period by sharing support piles from adjacent completed construction sites and connecting them to the basement.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a construction method for multi-layer basement phased construction supporting piles and basement connection, the method comprising the following steps:

[0005] S10: Construction preparation;

[0006] S20: Carry out foundation pit support pile structure construction;

[0007] S30: Carry out zoning construction of basement structure;

[0008] S40: Return the beam and slab to the top;

[0009] S50: Remove the supporting piles;

[0010] S60: Concrete pouring at the joint;

[0011] S70: Curing of concrete;

[0012] S80: Repeat steps S40 from beam and slab top-up to S70 from concrete curing; that is, repeat the structural top-up, support pile removal, concrete pouring at the connection, concrete curing, and connection of each basement floor until the construction is completed.

[0013] In the above steps, the specific steps of step S20 are:

[0014] S201: Use the existing support piles in the multi-story basement and adopt the pile support method. On both sides of the support piles, use steel piles with a pile diameter of 1.2-1.6 meters and plain piles with a pile diameter of 0.8-1.2 meters, one steel pile and one plain pile, with a spacing of 1-3 meters between the steel piles and the plain piles;

[0015] S202: Excavate the earthwork to the designed elevation, then install the first support beam reinforcement and proceed with formwork installation;

[0016] S203: pouring concrete for the installed first support beam reinforcement and curing it, and then removing the formwork;

[0017] S204: Excavate the earthwork again to the design elevation, then tie the second support beam reinforcement and install the formwork again;

[0018] S205: Concrete is poured and cured for the second support beam reinforcement, and the formwork is removed after curing is completed;

[0019] S206: Excavate the earth to the base elevation.

[0020] In the above steps, the specific steps of step S30 are:

[0021] S301: First, reserve basement connection lap reinforcement at the connecting beam and slab areas;

[0022] S302: Use a quick-closing mesh with a thickness of 0.3mm or more to leave construction joints at the connecting beam and slab areas and fix them with steel bars;

[0023] S303: Control the elevation of the beam and slab concrete by tensioning the front wire and wet the formwork with water, and then use the rush slurry method for pouring;

[0024] S304: After pouring, use a wooden bar to scrape it flat. After the surface is slightly dry, rub it to make it smooth; finally, remove the floating slurry.

[0025] In the above steps, the time for the beam and slab back-up construction in step S40 is after the basement structure construction is completed and reaches the design strength and before the connecting port support piles are removed.

[0026] In the above steps, the specific steps of step S40 are:

[0027] S401: The top return frame is erected parallel to the direction of the foundation pit support piles and is erected along the entire length. Pads are placed at the bottom of each vertical pole. The vertical and horizontal spacing of the vertical poles is not more than 600mm*600mm. The horizontal pole step is 1.5m. The height of the sweeping pole from the ground is not more than 250mm.

[0028] S402: After the support frame is erected to the basic height of the beam bottom or slab bottom and the adjustment rod is installed, a space is reserved for installing the U-shaped top support and the primary and secondary ribs;

[0029] S403: Install U-shaped top supports and main ribs. The main ribs are made of double steel pipes along the large span direction of the vertical poles, and secondary ribs are arranged on the main ribs.

[0030] In the above steps, the support piles are removed in step S50 by cutting and removing with a non-destructive static wire saw.

[0031] In the above steps, the specific steps of step 60 are:

[0032] S601: Place I-beams at corresponding locations according to the formwork support system, and then weld steel bars at the bottom of each upright of the I-beams;

[0033] S602: Chisel, rinse, and fully moisten the construction joints on both sides for at least 24 hours;

[0034] S603: Single-sided welding of the reserved steel bars in the construction joint is performed for 15 days, and the remaining steel bars are tied;

[0035] S604: Lay cement slurry at the construction joint and add expansion agent, crush it during the pouring process to ensure that the new and old concrete are tightly combined.

[0036] The beneficial effect of the present invention is that the method can reduce costs and shorten construction period by sharing support piles of adjacent completed construction sites and connecting them with the basement. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a step diagram of the method for constructing multi-story basements in stages using common support piles and connecting basements according to the present invention.

[0038] Figure 2 This is a schematic diagram of the construction of the retaining wall on the top of the crown beam in the present invention.

[0039] Figure 3 This is a schematic diagram of the connection between the supporting pile crown beam top KZD and the completed structural beam and slab.

[0040] Figure 4 Schematic diagram of using retaining piles as temporary structural support for cantilever beams and slabs in completed construction areas. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the accompanying drawings and examples.

[0042] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interactively without conflicting with each other.

[0043] Example 1

[0044] Reference Figure 1 The present invention discloses a multi-layer basement phased construction supporting pile sharing and basement connection construction method, specifically, the method comprises the following steps:

[0045] S10: Construction preparation;

[0046] S20: Carry out foundation pit support pile structure construction; the specific steps are:

[0047] S201: Use the existing support piles in the multi-story basement and adopt the pile support method. On both sides of the support piles, use 1.2-meter diameter steel piles and 0.8-meter diameter plain piles, one steel pile and one plain pile, with a 1-meter interval between the steel piles and the plain piles.

[0048] S202: Excavate the earthwork to the designed elevation, then install the first support beam reinforcement and proceed with formwork installation;

[0049] S203: pouring concrete for the installed first support beam reinforcement and curing it, and then removing the formwork;

[0050] S204: Excavate the earthwork again to the design elevation, then tie the second support beam reinforcement and install the formwork again;

[0051] S205: Concrete is poured and cured for the second support beam reinforcement, and the formwork is removed after curing is completed;

[0052] S206: Excavate the earthwork to the base elevation;

[0053] S30: Carry out zoning construction of the basement structure; the specific steps are:

[0054] S301: First, reserve basement connection lap reinforcement at the connecting beam and slab areas;

[0055] S302: Use a quick-closing mesh with a thickness of 0.3mm or more to leave construction joints at the connecting beam and slab areas and fix them with steel bars;

[0056] S303: Control the elevation of the beam and slab concrete by tensioning the front wire and wet the formwork with water, and then use the rush slurry method for pouring;

[0057] S304: After pouring, use a wooden bar to scrape it flat. After the surface is slightly dry, rub it to make it smooth. Finally, remove the floating slurry.

[0058] S40: Re-top the beams and slabs. After the basement structure is completed and reaches the designed strength, before the connecting support piles are removed, it is necessary to use a re-top frame to re-top the beams and slabs connected to the support piles. The specific steps are as follows:

[0059] S401: The top return frame is erected parallel to the direction of the foundation pit support piles and is erected along the entire length. Pads are placed at the bottom of each vertical pole. The vertical and horizontal spacing of the vertical poles is not more than 600mm*600mm. The horizontal pole step is 1.5m. The height of the sweeping pole from the ground is not more than 250mm.

[0060] S402: After the support frame is erected to the basic height of the beam bottom or slab bottom and the adjustment rod is installed, a space is reserved for installing the U-shaped top support and the primary and secondary ribs;

[0061] S403: Install U-shaped top supports and main ribs. The main ribs are made of double steel pipes along the long span direction of the vertical poles, and secondary ribs are arranged on the main ribs.

[0062] S50: Remove the support piles; first use the inclined bracket to fix the support piles, and then use the non-destructive static wire saw to remove them;

[0063] S60: Pour concrete at the connection; the specific steps are:

[0064] S601: Place I-beams at corresponding locations according to the formwork support system, and then weld steel bars at the bottom of each upright of the I-beams;

[0065] S602: Chisel, rinse, and fully moisten the construction joints on both sides for at least 24 hours;

[0066] S603: Single-sided welding of the reserved steel bars in the construction joint is performed for 15 days, and the remaining steel bars are tied;

[0067] S604: Lay cement slurry at the construction joint and add expansion agent, crushing it during the pouring process to ensure that the new and old concrete are tightly combined;

[0068] S70: Curing of concrete;

[0069] S80: Repeat the removal of the lower support piles and the pouring of concrete at the connection; that is, repeat the process of returning the structure to the top → removing the support piles → pouring concrete at the connection → concrete curing → completing the connection construction of each basement floor.

[0070] Example 2

[0071] Reference Figure 1 The present invention discloses a multi-layer basement phased construction supporting pile sharing and basement connection construction method, specifically, the method comprises the following steps:

[0072] S10: Construction preparation;

[0073] S20: Carry out foundation pit support pile structure construction; the specific steps are:

[0074] S201: Use the existing support piles in the multi-story basement and adopt the pile support method. On both sides of the support piles, use 1.4-meter diameter steel piles and 1-meter diameter plain piles, one steel pile and one plain pile, with a 2-meter interval between the steel piles and the plain piles.

[0075] S202: Excavate the earthwork to the designed elevation, then install the first support beam reinforcement and proceed with formwork installation;

[0076] S203: pouring concrete for the installed first support beam reinforcement and curing it, and then removing the formwork;

[0077] S204: Excavate the earthwork again to the design elevation, then tie the second support beam reinforcement and install the formwork again;

[0078] S205: Concrete is poured and cured for the second support beam reinforcement, and the formwork is removed after curing is completed;

[0079] S206: Excavate the earthwork to the base elevation;

[0080] S30: Carry out zoning construction of the basement structure; the specific steps are:

[0081] S301: First, reserve basement connection lap reinforcement at the connecting beam and slab areas;

[0082] S302: Use a quick-closing mesh with a thickness of 0.3mm or more to leave construction joints at the connecting beam and slab areas and fix them with steel bars;

[0083] S303: Control the elevation of the beam and slab concrete by tensioning the front wire and wet the formwork with water, and then use the rush slurry method for pouring;

[0084] S304: After pouring, use a wooden bar to scrape it flat. After the surface is slightly dry, rub it to make it smooth. Finally, remove the floating slurry.

[0085] S40: Re-top the beams and slabs. After the basement structure is completed and reaches the designed strength, before the connecting support piles are removed, it is necessary to use a re-top frame to re-top the beams and slabs connected to the support piles. The specific steps are as follows:

[0086] S401: The top return frame is erected parallel to the direction of the foundation pit support piles and is erected along the entire length. Pads are placed at the bottom of each vertical pole. The vertical and horizontal spacing of the vertical poles is not more than 600mm*600mm. The horizontal pole step is 1.5m. The height of the sweeping pole from the ground is not more than 250mm.

[0087] S402: After the support frame is erected to the basic height of the beam bottom or slab bottom and the adjustment rod is installed, a space is reserved for installing the U-shaped top support and the primary and secondary ribs;

[0088] S403: Install U-shaped top supports and main ribs. The main ribs are made of double steel pipes along the long span direction of the vertical poles, and secondary ribs are arranged on the main ribs.

[0089] S50: Remove the support piles; first use the inclined bracket to fix the support piles, and then use the non-destructive static wire saw to remove them;

[0090] S60: Pour concrete at the connection; the specific steps are:

[0091] S601: Place I-beams at corresponding locations according to the formwork support system, and then weld steel bars at the bottom of each upright of the I-beams;

[0092] S602: Chisel, rinse, and fully moisten the construction joints on both sides for at least 24 hours;

[0093] S603: Single-sided welding of the reserved steel bars in the construction joint is performed for 15 days, and the remaining steel bars are tied;

[0094] S604: Lay cement slurry at the construction joint and add expansion agent, crushing it during the pouring process to ensure that the new and old concrete are tightly combined;

[0095] S70: Curing of concrete;

[0096] S80: Repeat the removal of the lower support piles and the pouring of concrete at the connection; that is, repeat the process of returning the structure to the top → removing the support piles → pouring concrete at the connection → concrete curing → completing the connection construction of each basement floor.

[0097] Example 3

[0098] Reference Figure 1 The present invention discloses a multi-layer basement phased construction supporting pile sharing and basement connection construction method, specifically, the method comprises the following steps:

[0099] S10: Construction preparation;

[0100] S20: Carry out foundation pit support pile structure construction; the specific steps are:

[0101] S201: Use the existing support piles in the multi-story basement and adopt the pile support method. On both sides of the support piles, use 1.6-meter diameter steel piles and 1.2-meter diameter plain piles, one steel pile and one plain pile, with a spacing of 3 meters between the steel piles and the plain piles.

[0102] S202: Excavate the earthwork to the designed elevation, then install the first support beam reinforcement and proceed with formwork installation;

[0103] S203: pouring concrete for the installed first support beam reinforcement and curing it, and then removing the formwork;

[0104] S204: Excavate the earthwork again to the design elevation, then tie the second support beam reinforcement and install the formwork again;

[0105] S205: Concrete is poured and cured for the second support beam reinforcement, and the formwork is removed after curing is completed;

[0106] S206: Excavate the earthwork to the base elevation;

[0107] S30: Carry out zoning construction of the basement structure; the specific steps are:

[0108] S301: First, reserve basement connection lap reinforcement at the connecting beam and slab areas;

[0109] S302: Use a quick-closing mesh with a thickness of 0.3mm or more to leave construction joints at the connecting beam and slab areas and fix them with steel bars;

[0110] S303: Control the elevation of the beam and slab concrete by tensioning the front wire and wet the formwork with water, and then use the rush slurry method for pouring;

[0111] S304: After pouring, use a wooden bar to scrape it flat. After the surface is slightly dry, rub it to make it smooth. Finally, remove the floating slurry.

[0112] S40: Re-top the beams and slabs. After the basement structure is completed and reaches the designed strength, before the connecting support piles are removed, it is necessary to use a re-top frame to re-top the beams and slabs connected to the support piles. The specific steps are as follows:

[0113] S401: The top return frame is erected parallel to the direction of the foundation pit support piles and is erected along the entire length. Pads are placed at the bottom of each vertical pole. The vertical and horizontal spacing of the vertical poles is not more than 600mm*600mm. The horizontal pole step is 1.5m. The height of the sweeping pole from the ground is not more than 250mm.

[0114] S402: After the support frame is erected to the basic height of the beam bottom or slab bottom and the adjustment rod is installed, a space is reserved for installing the U-shaped top support and the primary and secondary ribs;

[0115] S403: Install U-shaped top supports and main ribs. The main ribs are made of double steel pipes along the long span direction of the vertical poles, and secondary ribs are arranged on the main ribs.

[0116] S50: Remove the support piles; first use the inclined bracket to fix the support piles, and then use the non-destructive static wire saw to remove them;

[0117] S60: Pour concrete at the connection; the specific steps are:

[0118] S601: Place I-beams at corresponding locations according to the formwork support system, and then weld steel bars at the bottom of each upright of the I-beams;

[0119] S602: Chisel, rinse, and fully moisten the construction joints on both sides for at least 24 hours;

[0120] S603: Single-sided welding of the reserved steel bars in the construction joint is performed for 15 days, and the remaining steel bars are tied;

[0121] S604: Lay cement slurry at the construction joint and add expansion agent, crushing it during the pouring process to ensure that the new and old concrete are tightly combined;

[0122] S70: Curing of concrete;

[0123] S80: Repeat the removal of the lower support piles and the pouring of concrete at the connection; that is, repeat the process of returning the structure to the top → removing the support piles → pouring concrete at the connection → concrete curing → completing the connection construction of each basement floor.

[0124] Reference Figures 2 to 4 During the construction of the Qianhai Building East Plaza project, through joint site surveys and technical research with technical personnel related to nearby buildings and foundation pit design units, the retaining wall on the east side from south to north was finally connected to the crown beam of the support pile using a folded plate method to ensure that the outdoor area surveying of the people's livelihood project is not affected, and the impact on the pipelines and landscape of the people's livelihood project is also minimized, reducing the impact on the construction period to a minimum; and the support piles on the west side of the project are used as temporary support points for the cantilevered beams and slabs in the completed area. Due to the height difference between the top elevation of the crown beam and the bottom of the structural beam and slab, KZD (column pier) is added within this height difference range to connect the beam and slab of the constructed plot with the crown beam of the support pile.

[0125] This method utilizes support piles from adjacent, completed projects, further reducing construction space and costs. Construction of the connection area occurs during the basement structural phase, without disrupting the basement structure or subsequent mechanical, electrical, and fire protection installations. This minimizes the impact of support pile removal and connection work on the overall construction schedule. This method offers high efficiency and lower construction costs compared to traditional methods, while maintaining high quality. It reduces safety hazards during the construction of hazardous projects, avoids the impact of structural work on subsequent projects, saves construction time and costs, and generates significant social benefits.

Claims

1. A multi-story basement phased construction method for sharing supporting piles and connecting basements, characterized in that: The method comprises the following steps: S10: Construction preparation; S20: Carry out foundation pit support pile structure construction; The specific steps of step S20 are: S201: Use the existing support piles in the multi-story basement and adopt the pile support method. On both sides of the support piles, use steel piles with a pile diameter of 1.2-1.6 meters and plain piles with a pile diameter of 0.8-1 meter, one steel pile and one plain pile, with a spacing of 1-3 meters between the steel piles and the plain piles; S202: Excavate the earthwork to the designed elevation, then install the first support beam reinforcement and proceed with formwork installation; S203: pouring concrete for the installed first support beam reinforcement and curing it, and then removing the formwork; S204: Excavate the earthwork again to the design elevation, then tie the second support beam reinforcement and install the formwork again; S205: Concrete is poured and cured for the second support beam reinforcement, and the formwork is removed after curing is completed; S206: Excavate the earthwork to the base elevation; S30: Performing zoning construction on the basement structure; the specific steps of step S30 are: S301: First, reserve basement connection lap reinforcement at the connecting beam and slab areas; S302: Use a quick-closing mesh with a thickness of 0.3mm or more to leave construction joints at the connecting beam and slab areas and fix them with steel bars; S303: Control the elevation of the beam and slab concrete by tensioning the front wire and wet the formwork with water, and then use the rush slurry method for pouring; S304: After pouring, use a wooden bar to scrape it flat. After the surface is slightly dry, rub it to make it smooth. Finally, remove the floating slurry. S40: Return the beam and slab to the top; The specific steps of step S40 are: S401: The top return frame is erected parallel to the direction of the foundation pit support piles and is erected along the entire length. Pads are placed at the bottom of each vertical pole. The vertical and horizontal spacing of the vertical poles is not more than 600mm*600mm. The horizontal pole step is 1.5m. The height of the sweeping pole from the ground is not more than 250mm. S402: After the support frame is erected to the basic height of the beam bottom or slab bottom and the adjustment rod is installed, a space is reserved for installing the U-shaped top support and the primary and secondary ribs; S403: Install U-shaped top supports and main ribs. The main ribs are made of double steel pipes along the long span direction of the vertical poles, and secondary ribs are arranged on the main ribs. S50: Remove the supporting piles; S60: Concrete pouring at the joint; The specific steps of step S60 are: S601: Place I-beams at corresponding locations according to the formwork support system, and then weld steel bars at the bottom of each upright of the I-beams; S602: Chisel, rinse, and fully moisten the construction joints on both sides for at least 24 hours; S603: Single-sided welding of the reserved steel bars in the construction joint is performed for 15 days, and the remaining steel bars are tied; S604: Lay cement slurry at the construction joint and add expansion agent, crushing it during the pouring process to ensure that the new and old concrete are tightly combined; S70: Curing of concrete; S80: Repeat steps S40 from beam and slab top-up to S70 from concrete curing; that is, repeat the structural top-up, support pile removal, concrete pouring at the connection, concrete curing, and connection of each basement floor until the construction is completed.

2. A multi-story basement phased construction method for supporting piles and basement connection according to claim 1, characterized in that: The time for the beam and slab re-top construction in step S40 is after the basement structure construction is completed and reaches the design strength and before the connecting port support piles are removed.

3. The method for connecting multi-story basement support piles in phased construction with basement connections according to claim 1 is characterized in that: The support piles in step S50 are removed by cutting with a non-destructive static wire saw.

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