Method for constructing a cup foundation

Abstract

The present application relates to cup mouth foundation construction technical field, specifically a cup foundation construction method, construction steps are: cup core mould prefabrication - bottom plate steel bar binding - placing cup core mould - cup wall steel bar binding - cup mouth outer formwork support - pouring concrete - cup core mould form removal, wherein, cup core mould is divided into left side box, right side box and middle box, when placing cup core mould, first put left side box, right side box, then insert middle box tightly, when removing cup core mould form, first use crane to lift out middle box, then take out left side box and right side box in turn, this construction method compared with prior art, only need to take out middle box when removing form, then can easily remove left side box and right side box, compared with traditional method, avoid cup core mould binding, support, tie, fixed, save time and effort when taking out, effectively improve construction efficiency, at the same time, no deformation when taking out, convenient for cup core mould circulation use.

Description

Technical Field

[0001] This invention relates to the field of cup-shaped foundation construction technology, specifically a cup-shaped foundation construction method. Background Technology

[0002] A cup-shaped foundation is a type of independent foundation. When precast components are used for the column, the foundation is often made into a cup shape, and the column is then inserted and fixed inside the cup. Hence, it is also called a cup-shaped foundation. The conventional method for cup-shaped foundations is to use a core mold to create the core mold. Traditionally, wooden formwork is used to create the core mold for the cup-shaped foundation. The construction process generally includes: ① earthwork excavation; ② foundation slab reinforcement binding; ③ placement and fixing of the cup-shaped foundation core mold; ④ cup wall reinforcement binding; ⑤ cup-shaped foundation platform formwork erection; ⑥ cup-shaped outer formwork erection; ⑦ concrete pouring; ⑧ cup-shaped foundation core mold removal.

[0003] The existing technology has the following problems: 1. When removing the core mold of the cup rim, it is generally necessary to use a pry bar to remove the mold. After the core mold is removed, it is generally damaged and cannot be reused, resulting in low material utilization; 2. The core mold of the cup rim needs to be supported and fixed on-site by assembling wooden templates and setting tie rods, internal supports, etc., which is a complex construction process and requires a lot of manpower and material resources for installation and reinforcement; 3. Removing the core mold can also easily damage the cup rim structure, affecting the construction quality. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a cup-shaped foundation construction method that allows the cup core mold to be easily removed and reused after removal.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A method for constructing a cup-shaped foundation, the construction steps are as follows:

[0007] S1: Level the site, mark the location and layout according to the design requirements, and build a brick well ring;

[0008] S2: Excavate the foundation pit within the brick well ring, and after excavation, pour the leveling layer;

[0009] S3, tie the bottom slab reinforcement on the leveling layer;

[0010] S4: First, apply release agent to the outside of the cup core mold, and then place the cup core mold;

[0011] S5: Binding of the cup wall reinforcement, which includes horizontal reinforcement, longitudinal reinforcement and tie bars;

[0012] S6: External formwork support for the cup rim;

[0013] S7: Pour concrete between the outer template of the cup opening and the core mold of the cup;

[0014] S8: Remove the core formwork after the initial setting of the concrete and before the final setting.

[0015] It also includes step S0: cup core mold prefabrication. The cup core mold is divided into three parts: the left box, the middle box, and the right box. The longitudinal sections of the left box and the right box are both right trapezoids. The lower side of the right side of the left box and the lower side of the left side of the right box are both inclined outward. The longitudinal section of the middle box is an isosceles trapezoid or an isosceles triangle. The lower side of its left and right sides are both inclined inward. The right side of the left box and the left side of the right box match the left and right sides of the middle box.

[0016] In step S4, when placing the cup core mold, place the left box first, then the right box;

[0017] Before step S7, the middle box is inserted between the left box and the right box, and the left box, the right box and the middle box are combined to form the cup core mold as a whole;

[0018] In step S8, when the cup core template is removed, there are lifting lugs on the middle box. First, use a crane to lift the middle box out, and then take out the left box and the right box in sequence.

[0019] Preferably, in step S5, when binding the cup wall reinforcement, at least two extended longitudinal reinforcements are provided on each side of the longitudinal reinforcements on the left and right sides of the cup core mold, and the extended longitudinal reinforcements extend vertically upward.

[0020] Correspondingly, T-shaped connecting bars are provided on both the left and right boxes. The T-shaped connecting bars are set horizontally, and their vertical ends are fixed to the left side of the left box or the right side of the right box. When fixing the left and right boxes, the horizontal part of the T-shaped connecting bars abuts against the extended longitudinal steel bars and is tied to them.

[0021] Preferably, after the middle box is inserted between the left and right boxes, an anti-buoyancy rod is installed on the middle box. The anti-buoyancy rod is connected and fixed to the extended longitudinal steel bars on the left and right sides through pipe fittings and fasteners.

[0022] Preferably, in step S3, after the bottom plate reinforcement is tied, positioning bars are set on the bottom plate reinforcement. The positioning bars are set at intervals around the preset position of the cup core mold and are set vertically.

[0023] Preferably, in step S5, when binding the cup wall reinforcement, at least one extended longitudinal reinforcement is set on each of the left and right sides, and at least two extended longitudinal reinforcements are set on each of the front and rear sides, with the extended longitudinal reinforcements extending vertically upward.

[0024] It also includes anti-buoyancy rod one and anti-buoyancy rod two. Anti-buoyancy rod one is pressed on the middle box body. Anti-buoyancy rod one and the extended longitudinal steel bars on the left and right sides are connected and fixed by pipe fittings and fasteners. At the same time, anti-buoyancy rod two is pressed on the left and right box bodies. Anti-buoyancy rod two and the extended longitudinal steel bars on the front and rear sides are connected and fixed by pipe fittings and fasteners.

[0025] Preferably, the height of the left and right boxes is greater than the depth of the platform, and the height of the middle box is greater than the height of the left and right boxes.

[0026] Preferably, the left, middle, and right boxes are all hollow structures, and each of the left, middle, and right boxes is provided with a support structure, which includes an inner rib and an inner support. The inner rib is attached to the inside of the left, middle, and right boxes, and the end of the inner support abuts against the inner rib.

[0027] Preferably, the left, middle, and right boxes are made of wooden or steel templates.

[0028] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art:

[0029] This construction method is a cup-shaped foundation construction method developed based on actual site requirements. Compared with existing technologies, this method divides the cup core mold into three parts: the left box, the right box, and the middle box. The three boxes are connected by inclined surfaces to form a whole. When dismantling the mold, only the middle box needs to be removed, and then the left and right boxes can be easily removed. Compared with traditional methods, it avoids the need for binding, supporting, tying, and fixing of the cup core mold, saving time and effort and effectively improving construction efficiency. At the same time, there is no deformation when removing it, which facilitates the reuse of the cup core mold. Attached Figure Description

[0030] Figure 1 This is a structural diagram of the left and right boxes placed on the bottom plate reinforcement in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure during the binding of the cup wall reinforcement in an embodiment of the present invention;

[0032] Figure 3 This is a top view of the structure after the middle box is placed in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure when the anti-buoyancy rod is set in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the cup core mold in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of another cup core mold in an embodiment of the present invention;

[0036] Figure 7 This is a structural schematic diagram of the positioning ribs in an embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure when anti-buoyancy rod one and anti-buoyancy rod two are set in an embodiment of the present invention;

[0038] Figure 9 This is a schematic diagram of the inner rib structure in an embodiment of the present invention;

[0039] Figure 10 This is a schematic diagram of the inner rib and inner support in an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached drawings: 1. Bottom slab reinforcement; 2. Left side box; 3. Middle box; 301. Lifting lug; 4. Right side box; 5. Cup wall reinforcement; 501. Horizontal reinforcement; 502. Vertical reinforcement; 503. Longitudinal reinforcement; 6. Extended longitudinal reinforcement; 7. T-shaped connecting bar; 8. Outer formwork of the cup opening; 9. Anti-buoyancy rod one; 10. Pipe fittings and fasteners; 11. Positioning bar; 12. Inner rib; 13. Internal support; 14. Anti-buoyancy rod two. Detailed Implementation

[0041] The present invention will be further illustrated below with reference to specific embodiments. The purpose of this illustration is solely to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0042] Example 1, as Figures 1 to 3 As shown in the figure, this embodiment provides a method for constructing a cup-shaped foundation. The construction steps are as follows:

[0043] Step S0: As Figure 5 , Figure 6 First, the cup core mold is prefabricated. The cup core mold is divided into three parts: the left box 2, the middle box 3, and the right box 4. The longitudinal sections of the left box 2 and the right box 4 are both right trapezoids. The lower side of the right side of the left box 2 and the lower side of the left side of the right box 4 are both inclined outward. The longitudinal section of the middle box 3 is an isosceles trapezoid or an isosceles triangle. The lower side of its left and right sides are both inclined inward. The right side of the left box 2 and the left side of the right box 4 match the left and right sides of the middle box 3. The left box 2, the middle box 3, and the right box 4 are made of wooden templates or steel templates.

[0044] Preferably, the height of the left box 2 and the right box 4 is greater than the depth of the support platform, and the height of the middle box 3 is greater than the height of the left box 2 and the right box 4, so as to facilitate the quick removal of the middle box 3.

[0045] Preferred, such as Figure 9 , Figure 10The left box 2, the middle box 3 and the right box 4 are hollow structures, which are easy to manufacture and have low manufacturing costs; the left box 2, the middle box 3 and the right box 4 are provided with inner ribs 12; in the left box 2, the middle box 3 or the right box 4, the inner ribs 12 on opposite sides are provided with inner supports 13.

[0046] Step S1: Level the site, mark the location and layout according to the design requirements, and build a brick well ring.

[0047] Step S2: Excavate the foundation pit within the brick well ring. After excavation, pour the leveling layer.

[0048] Step S3: Tie the bottom slab reinforcement 1 on the leveling layer.

[0049] Step S4: As Figure 1 First, apply a release agent to the outside of the left box 2 and the right box 4, and then place the left box 2 and the right box 4 in the preset position.

[0050] Among them, T-shaped connecting ribs 7 are also provided on the left box 2 and the right box 4. The T-shaped connecting ribs 7 are horizontally arranged and the vertical ends are fixed to the left side of the left box 2 or the right side of the right box 4.

[0051] S5: As Figure 2 The cup wall reinforcement 5 is tied. When tying the cup wall reinforcement 5, the cup wall reinforcement 5 includes horizontal reinforcement, longitudinal reinforcement 503, and tie bars; such as... Figure 3 The horizontal reinforcement includes transverse horizontal reinforcement 501 and vertical horizontal reinforcement 502; among the longitudinal reinforcements 503 on the left and right sides of the core mold, each side is provided with an extended longitudinal reinforcement 6 corresponding to the T-shaped connecting bar 7, and the extended longitudinal reinforcement 6 extends vertically upward; the horizontal part of the T-shaped connecting bar 7 abuts against the extended longitudinal reinforcement 6 and is tied and fixed thereto.

[0052] Then, as Figure 3 Then, the middle box 3 is inserted and tightened, and the left box 2, the right box 4 and the middle box 3 are combined to form the cup core mold as a whole; a counterweight is pressed on the middle box 3 to prevent the cup core mold from floating when pouring concrete.

[0053] Step S6: Set up the outer template 8 for the cup opening.

[0054] Step S7: Pour concrete between the outer mold 8 of the cup opening and the core mold of the cup.

[0055] Step S8: After the initial setting of the concrete but before the final setting, remove the core mold. When removing the core mold, the intermediate box 3 is equipped with lifting lugs 301. First, use a crane to lift the intermediate box 3 out. After lifting the intermediate box 3 out, the position where the core mold was placed will be empty. Push the left box 2 and the right box 4 to the side where the original intermediate box 3 was located. When pushing the left box 2 and the right box 4, push them higher than the cup opening position. Then, easily separate the left box 2 and the right box 4 from the concrete structure and take them out one by one.

[0056] Example 2: Steps S1-S4 are the same as in Example 1.

[0057] When binding the cup wall reinforcement 5 in step S5, the cup wall reinforcement 5 includes horizontal reinforcement, longitudinal reinforcement 503 and tie bars. In the longitudinal reinforcement 503 on the left and right sides of the cup core mold, each side is provided with an extended longitudinal reinforcement 6 corresponding to the T-shaped connecting bar 7. The extended longitudinal reinforcement 6 extends vertically upward; the horizontal part of the T-shaped connecting bar 7 abuts against the extended longitudinal reinforcement 6 and is bound to it.

[0058] Then, the middle box 3 is inserted and tightened, and the left box 2, the right box 4 and the middle box 3 are combined to form the cup core mold as a whole.

[0059] like Figure 4 It also includes an anti-buoyancy rod 9, which is pressed on the middle box 3. The anti-buoyancy rod 9 and the extended longitudinal steel bars 6 on the left and right sides are connected and fixed by pipe fittings and fasteners 10.

[0060] Steps S6-S8 are the same as in Example 1.

[0061] Example 3: Steps S1-S3 are the same as in Example 1. In addition, after the bottom plate reinforcement 1 is tied in step S3, positioning reinforcement 11 is set on the bottom plate reinforcement 1. The positioning reinforcement 11 is set at intervals around the preset position of the cup core mold and is set vertically.

[0062] In step S4, as Figure 7 First, apply a release agent to the outside of the left box 2 and the right box 4. Then, place the left box 2 and the right box 4 along the positioning rib 11 inside the positioning rib 11 to preset the cup core mold installation position. Then, insert the middle box 3 and tighten it. The left box 2, the right box 4 and the middle box 3 are combined to form the cup core mold as a whole.

[0063] Among them, the left box 2 and the right box 4 do not need to have T-shaped connecting ribs 7.

[0064] Step S5: Binding of the cup wall reinforcement 5. When binding the cup wall reinforcement 5, the cup wall reinforcement 5 includes horizontal reinforcement, longitudinal reinforcement 503 and tie bars. Among the longitudinal reinforcement 503 on the four sides of the cup core mold, at least one extended longitudinal reinforcement 6 is set on each of the left and right sides, and at least two extended longitudinal reinforcements 6 are set on each of the front and rear sides. The extended longitudinal reinforcements 6 extend vertically upward. In this embodiment, two extended longitudinal reinforcements 6 are set on each of the left and right sides, and two extended longitudinal reinforcements 6 are set on each of the front and rear sides.

[0065] like Figure 8 It also includes anti-buoyancy rod 19 and anti-buoyancy rod 214. Anti-buoyancy rod 19 is pressed on the middle box 3. Anti-buoyancy rod 19 and the extended longitudinal steel bars 6 on the left and right sides are connected and fixed by pipe fittings and fasteners 10. At the same time, anti-buoyancy rod 214 is pressed on the left box 2 and the right box 4. Anti-buoyancy rod 214 and the extended longitudinal steel bars 6 on the front and rear sides are connected and fixed by pipe fittings and fasteners 10. Among them, anti-buoyancy rod 19 and anti-buoyancy rod 214 not only play an anti-buoyancy role, but also play a further fixing role.

[0066] Steps S6-S8 are the same as in Example 1.

[0067] In this invention, the cup core mold is divided into three parts: a left box 2, a right box 4, and a middle box 3. The three boxes are connected by inclined surfaces to form a part. When disassembling the mold, only the middle box 3 needs to be removed, and then the left box 2 and the right box 4 can be easily removed. Compared with the traditional method, the cup core mold is avoided by binding, supporting, pulling, and fixing. It is time-saving and labor-saving to remove, which effectively improves the construction efficiency. At the same time, there is no deformation when it is removed, which makes it easy for the cup core mold to be reused.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A method for constructing a cup-shaped foundation, comprising the following steps: S1: Level the site, mark the location and layout according to the design requirements, and build a brick well ring; S2: Excavate the foundation pit within the brick well ring, and after excavation, pour the leveling layer; S3, tie the bottom slab reinforcement on the leveling layer; S4: First, apply release agent to the outside of the cup core mold, and then place the cup core mold; S5: Binding of the cup wall reinforcement, which includes horizontal reinforcement, longitudinal reinforcement and tie bars; S6: External formwork support for the cup rim; S7: Pour concrete between the outer template of the cup opening and the core mold of the cup; S8: Remove the core formwork after the initial setting of the concrete and before the final setting. Its features are, It also includes step S0: cup core mold prefabrication. The cup core mold is divided into three parts: the left box, the middle box, and the right box. The longitudinal sections of the left box and the right box are both right trapezoids. The lower side of the right side of the left box and the lower side of the left side of the right box are both inclined outward. The longitudinal section of the middle box is an isosceles trapezoid or an isosceles triangle. The lower side of its left and right sides are both inclined inward. The right side of the left box and the left side of the right box match the left and right sides of the middle box. In step S4, when placing the cup core mold, place the left box first, then the right box; Before step S7, the middle box is inserted between the left box and the right box, and the left box, the right box and the middle box are combined to form the cup core mold as a whole; In step S8, when the cup core template is removed, there are lifting lugs on the middle box. First, use a crane to lift the middle box out, and then take out the left box and the right box in sequence.

2. The cup-shaped foundation construction method according to claim 1, characterized in that: In step S5, when binding the cup wall reinforcement, at least one extended longitudinal reinforcement is set on each side of the longitudinal reinforcement on the left and right sides of the cup core mold, and the extended longitudinal reinforcement extends vertically upward. Correspondingly, T-shaped connecting bars are provided on both the left and right boxes. The T-shaped connecting bars are set horizontally, and their vertical ends are fixed to the left side of the left box or the right side of the right box. When fixing the left and right boxes, the horizontal part of the T-shaped connecting bars abuts against the extended longitudinal steel bars and is tied to them.

3. The cup-shaped foundation construction method according to claim 2, characterized in that: After inserting the middle box between the left and right boxes, an anti-buoyancy rod is also required on the middle box. The anti-buoyancy rod is connected and fixed to the extended longitudinal steel bars on the left and right sides through pipe fittings and fasteners.

4. The cup-shaped foundation construction method according to claim 1, characterized in that: In step S3, after the bottom plate reinforcement is tied, positioning bars are set on the bottom plate reinforcement. The positioning bars are set at intervals around the preset position of the cup core mold and are set vertically.

5. The cup-shaped foundation construction method according to claim 4, characterized in that: In step S5, when binding the cup wall reinforcement, at least one extended longitudinal reinforcement is set on each of the left and right sides, and at least two extended longitudinal reinforcements are set on each of the front and rear sides. The extended longitudinal reinforcements extend vertically upward. It also includes anti-buoyancy rod one and anti-buoyancy rod two. Anti-buoyancy rod one is pressed on the middle box body. Anti-buoyancy rod one and the extended longitudinal steel bars on the left and right sides are connected and fixed by pipe fittings and fasteners. At the same time, anti-buoyancy rod two is pressed on the left and right box bodies. Anti-buoyancy rod two and the extended longitudinal steel bars on the front and rear sides are connected and fixed by pipe fittings and fasteners.

6. The cup-shaped foundation construction method according to claim 1, characterized in that: The height of the left and right boxes is greater than the depth of the foundation, and the height of the middle box is greater than the height of the left and right boxes.

7. The cup-shaped foundation construction method according to claim 1, characterized in that: The left, middle, and right boxes are all hollow structures. Each of the left, middle, and right boxes has a supporting structure, which includes an inner rib and an inner support. The inner rib fits against the inside of the left, middle, and right boxes, and the end of the inner support abuts against the inner rib.

8. The cup-shaped foundation construction method according to claim 1, characterized in that: The left, middle, and right boxes are made of wooden or steel formwork.

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