A prestressed square pile connection structure and a clustering method for a compression structure

Abstract

The present invention provides a prestressed square pile connection structure and a clustering method when used as a compression structure, which belongs to the field of building construction technology. The technical solution is as follows: it includes concrete poured at both ends of the hollow square pile, a pin steel pipe is integrally cast on one concrete, the pin steel pipe is concentrically arranged with the hollow square pile and the outer end extends out of the hollow square pile; a steel pipe slot that cooperates with the pin steel pipe is reserved on the other concrete. The beneficial effect of the present invention is that one end with the pin steel pipe and the plug rod is used as the male head, and the end with the steel pipe slot is used as the female head, and the connection of two hollow square piles is achieved by plugging. Concrete is poured at both ends of the square pile hole of the hollow square pile to connect the pin steel pipe and the square pile as a whole, while improving the rigidity and strength of the square pile end, and realizing the mutual connection and constraint between the square pile groups through the clamp.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, in particular to a prestressed square pile connection structure and a bundling method for a compression structure. Background Art

[0002] With the continuous development of the precast concrete pile industry, the product specifications of precast concrete piles in my country are becoming increasingly diverse and the combinations are becoming more reasonable. Prestressed concrete square piles are one of the more common types. Currently, the commonly used square pile types in China are mainly divided into two categories: pre-tensioned prestressed centrifugal concrete hollow square piles and pre-tensioned prestressed concrete solid square piles. Each pile type has different advantages and disadvantages.

[0003] Prestressed centrifugal concrete hollow square piles are manufactured using a prestressing process and a concrete centrifugal forming method. They feature a square exterior and a round interior. They combine the excellent shear resistance and high soil lateral friction of solid concrete square piles with the high concrete strength and low material cost of concrete pipe piles. However, as compression components, prestressed concrete square piles are currently used only in foundation construction and serve a limited purpose. To further promote their application, we now provide a prestressed square pile connection structure and a method for clustering them for large-tonnage compression structures. Summary of the Invention

[0004] The purpose of the present invention is to provide a prestressed square pile connection structure and a bundling method when the prestressed square piles are used as a compression structure.

[0005] The present invention is achieved through the following measures: a prestressed square pile connection structure, characterized in that it includes concrete cast at both ends of the hollow square pile, one concrete is integrally cast with a pin steel pipe, the pin steel pipe is concentrically arranged with the hollow square pile and the outer end extends out of the hollow square pile; the other concrete is reserved with a steel pipe slot that cooperates with the pin steel pipe.

[0006] A plurality of insertion rods are symmetrically arranged on one end of the hollow square pile close to the latch steel pipe, and an insertion rod slot matched with the insertion rod is arranged on the other end of the hollow square pile.

[0007] The pin steel pipes and the steel pipe slots of two adjacent hollow square piles cooperate with each other and a connecting steel plate is provided between the two hollow square piles, and the connecting steel plate is sleeved on the pin steel pipes.

[0008] The length of the concrete is not less than 50mm, generally 50-80mm, and the outer diameter of the pin steel pipe is generally 100-200mm. The specific size is determined according to actual conditions.

[0009] Working Principle: One end of the steel pipe with the pin and rod serves as the male end, while the other end with the steel pipe slot serves as the female end. Concrete is poured at both ends of the hollow square pile hole, connecting the pin steel pipe and the pile into a single unit, while also increasing the rigidity and strength of the pile end.

[0010] A method for clustering prestressed square piles as a compression structure, characterized by the following specific steps:

[0011] S1. Pour concrete at both ends of the hollow square piles to be bundled. Set a pin steel pipe concentrically at one end and pour it together with the concrete, so that the pin steel pipe and the concrete become a whole and ensure that the outer end of the pin steel pipe extends out of the hollow square pile. Hollow square piles are the main compression components of large-tonnage compression structures. The specifications of the square piles should be selected and determined according to the on-site compression requirements.

[0012] S2. Cast several plugs into the reserved holes at one end of the hollow square pile, with the plugs and the pin steel pipe located at the same end;

[0013] S3. When pouring the other end of the hollow square pile, reserve a steel pipe slot that matches the pin steel pipe; note that the inner diameter of the steel pipe slot should be 1~2mm larger than the outer diameter of the pin steel pipe to ensure that the pin steel pipe and the steel pipe slot can be smoothly connected.

[0014] S4. Determine the number of hollow square piles in a single square pile group and arrange all hollow square piles in a matrix; generally, nxm hollow square piles constitute a single square pile group, and it is best that n and m are the same, such as 2x2, 3x3, etc.

[0015] S5. Select connecting steel plates based on the number of hollow square piles in the square pile group, and sleeve the connecting steel plates onto all the latch steel pipes and plug rods; connect the latch pins and the latch steel pipes to the square piles at both ends through the connecting steel plates, and at the same time, fix each square pile horizontally through the connecting steel plates, thereby connecting the square pile group horizontally. The size and shape of the connecting steel plates can be determined based on the number, size, and arrangement of the square piles in the on-site square pile group.

[0016] S6. Connect two vertically adjacent square pile groups using a pinned steel pipe and a plug rod to form a square pile group. The plug rod ensures that the two piles at each end are aligned correctly, acting as a small positioning member. The pinned steel pipe prevents the two piles from misaligning, facilitating precise alignment and smooth pressure transmission.

[0017] S7. Distribute a plurality of square pile groups in a polygonal shape to form a compression structure, and connect the square pile groups via transverse connectors.

[0018] The working surfaces of two adjacent hollow square piles in a single square pile group are filled with epoxy resin.

[0019] The transverse connectors are connected by hoops, with adjacent hoops connected by connecting rods. The hoops are formed by butting two U-shaped plates together, and the joints are secured with bolts. The specific number of hoops depends on the actual situation.

[0020] The hoop is located at the connection between the two square pile groups. The hoop can be provided with ground anchors and anti-pull piles according to actual conditions.

[0021] The beneficial effects of the present invention are: effectively solving the connection problem of prestressed square piles when used to form large-tonnage compressive structures, the problem of clustering multiple prestressed square piles, and the problem of mutual connection between square pile groups, and realizing the mutual connection and constraint between square pile groups through clamps; the structure is easy to disassemble, so that the construction quality and construction efficiency are improved, and it also produces certain benefits for the promotion and application of prestressed concrete square piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the prestressed square pile connection structure;

[0023] Figure 2 Schematic diagram of the structure of connecting steel plates;

[0024] Figure 3 It is a structural diagram of the square pile group;

[0025] Figure 4 is a structural diagram of a compressed structure;

[0026] Figure 5 It is a structural diagram of the clamp.

[0027] Among them, the figures are marked as: 1, concrete; 2, plug rod; 3, plug steel pipe; 4, connecting steel plate; 5, steel pipe slot; 6, hollow square pile; 7, plug rod slot; 9, plug rod hole; 10, bolt; 11, connecting rod; 13, clamp; 14, square pile hole; 15, plug steel pipe hole. DETAILED DESCRIPTION

[0028] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0029] Example 1:

[0030] See also Figure 1-Figure 2 A prestressed square pile connection structure includes concrete 1 cast at both ends of a hollow square pile 6, a latch steel pipe 3 integrally cast on one concrete 1, the latch steel pipe 3 is concentrically arranged with the hollow square pile 6 and the outer end extends out of the hollow square pile 6; a steel pipe slot 5 is reserved on the other concrete 1 to cooperate with the latch steel pipe 3.

[0031] Several rods 2 are symmetrically arranged on one end of the hollow square pile 6 near the pin steel pipe 3, and a rod slot 7 is provided at the other end of the hollow square pile 6 to cooperate with the rods 2. The hollow square pile 6 generally has several pre-reserved holes at both ends. The rods 2 are poured into the pre-reserved holes at the same end as the pin steel pipe 3 by pouring concrete, and the pre-reserved holes at the other end are used as rod slots 7.

[0032] The bolt steel pipes 3 and the steel pipe slots 5 of two adjacent hollow square piles 6 cooperate with each other and a connecting steel plate 4 is provided between the two hollow square piles 6, and the connecting steel plate 4 is sleeved on the bolt steel pipe 3. The connecting steel plate 4 is provided with a rod hole 9 and a bolt steel pipe hole 15.

[0033] The length of the concrete 1 is not less than 50 mm, generally 50-80 mm, and the outer diameter of the pin steel pipe 3 is generally 100-200 mm. The specific size is determined according to the actual situation of the prestressed hollow square pile.

[0034] Working Principle: One end of the cast steel pipe 3 and the rod 2 serves as the male end, and the end with the steel pipe slot 5 serves as the female end. Through plugging, two hollow square piles 6 are connected. Concrete is poured at both ends of the square pile hole 14 of the hollow square pile 6, connecting the steel pipe 3 and the square pile into a whole, while also improving the rigidity and strength of the square pile end.

[0035] Example 2:

[0036] A method for clustering prestressed square piles as a compression structure, characterized by the following specific steps:

[0037] S1. Concrete 1 is poured at both ends of the hollow square piles 6 to be bundled, and a pin steel pipe 3 is concentrically set at one end and poured together with the concrete 1, so that the pin steel pipe 3 and the concrete become a whole and the outer end of the pin steel pipe 3 is ensured to extend out of the hollow square pile 6; the hollow square pile 6 is the main compressive component of the large-tonnage compressive structure, and the specifications of the square pile should be selected and determined according to the on-site compressive requirements.

[0038] S2. Cast several plug rods 2 in the reserved holes at one end of the hollow square pile 6. The plug rods 2 and the bolt steel pipe 3 are located at the same end;

[0039] When pouring S3 and the other end of the hollow square pile 6, a steel pipe slot 5 is reserved to match the latch steel pipe 3; note that the inner diameter of the steel pipe slot 5 should be 1 to 2 mm larger than the outer diameter of the latch steel pipe 3 to ensure that the latch steel pipe 3 and the steel pipe slot 5 can be smoothly docked.

[0040] S4. Determine the number of hollow square piles 6 in a single square pile group and arrange all hollow square piles 6 in a matrix; generally, nxm hollow square piles 6 constitute a single square pile group, and preferably, n and m are the same, such as 2x2, 3x3, etc.

[0041] S5. Select connecting steel plates 4 according to the number of hollow square piles 6 in the square pile group, and sleeve the connecting steel plates 4 onto all the latch steel pipes 3 and the plug rods 2; connect the latch pins and the latch steel pipes 3 to the square piles at both ends through the connecting steel plates 4, and at the same time, fix the square piles laterally through the connecting steel plates 4, thereby connecting the square pile group laterally. The size and shape of the connecting steel plates 4 can be determined according to the number, size and arrangement of the square piles in the on-site square pile group.

[0042] S6. Connect two vertically adjacent square pile groups using the bolt steel tube 3 and the insert rod 2 to form a square pile group. The insert rod 2 ensures that the two piles at both ends are aligned, acting as a small positioning member. The bolt steel tube 3 prevents the two piles from misaligning, facilitating accurate alignment and smooth pressure transmission.

[0043] S7. Distribute a plurality of square pile groups in a polygonal shape to form a compression structure, and connect the square pile groups via transverse connectors.

[0044] The working surfaces of two adjacent hollow square piles 6 in a single square pile group are both filled with epoxy resin.

[0045] The transverse connectors are connected by hoops 13, and two adjacent hoops 13 are connected by connecting rods 11. The hoops 13 are formed by butting two U-shaped plates together, and the connection is fixed by bolts 10. The specific number of hoops 13 is determined according to actual conditions.

[0046] The hoop 13 is located at the connection between the two square pile groups to strengthen the strength of the connection.

[0047] Example 3:

[0048] See also Figure 1-Figure 5 A compression structure based on prestressed square piles includes a plurality of polygonal square pile groups, which can be quadrilaterals or hexagons, etc. The square pile group includes a plurality of hollow square piles 6 arranged in a matrix, generally nxm hollow square piles 6 constitute a single square pile group, and it is best that the number n and m are the same, such as 2x2, 3x3, etc.

[0049] Vertically adjacent square pile groups are connected by connectors, transversely adjacent square pile groups are connected by connectors 11 , and the connection points between two vertically adjacent square pile groups are connected by a hoop 13 .

[0050] It includes concrete 1 cast at both ends of the hollow square pile 6, one concrete 1 is integrally cast with a pin steel pipe 3, the pin steel pipe 3 is concentrically arranged with the hollow square pile 6 and the outer end extends out of the hollow square pile 6; the other concrete 1 is reserved with a steel pipe slot 5 that cooperates with the pin steel pipe 3.

[0051] Several rods 2 are symmetrically arranged on one end of the hollow square pile 6 near the pin steel pipe 3, and a rod slot 7 is provided at the other end of the hollow square pile 6 to cooperate with the rods 2. The hollow square pile 6 generally has several pre-reserved holes at both ends. The rods 2 are poured into the pre-reserved holes at the same end as the pin steel pipe 3 by pouring concrete, and the pre-reserved holes at the other end are used as rod slots 7.

[0052] The bolt steel pipes 3 and the steel pipe slots 5 of two adjacent hollow square piles 6 cooperate with each other and a connecting steel plate 4 is provided between the two hollow square piles 6, and the connecting steel plate 4 is sleeved on the bolt steel pipe 3. The connecting steel plate 4 is provided with a rod hole 9 and a bolt steel pipe hole 15.

[0053] The length of the concrete 1 is not less than 50 mm, generally 50-80 mm, and the outer diameter of the bolt steel pipe 3 is generally 100-200 mm, and the specific size is determined according to actual conditions.

[0054] Hollow square piles 6 are the main compression components of large-tonnage compression structures, and the specifications of the square piles should be selected and determined according to the on-site compression requirements.

[0055] The inner diameter of the steel pipe slot 5 should be 1 to 2 mm larger than the outer diameter of the pin steel pipe 3 to ensure that the pin steel pipe 3 and the steel pipe slot 5 can be smoothly connected.

[0056] The connecting steel plate 4 is sleeved on all the plug steel pipes 3 and the plug rods 2, so that the plugs and the plug steel pipes 3 are connected to the square piles at both ends through the connecting steel plate 4. At the same time, the connecting steel plate 4 is used to fix each square pile horizontally, thereby playing the role of horizontally connecting the square pile group. The size and shape of the connecting steel plate 4 can be determined according to the number, size and arrangement of the square piles in the on-site square pile group.

[0057] The working surfaces of two adjacent hollow square piles 6 in a single square pile group are both filled with epoxy resin.

[0058] The transverse connectors are connected by hoops 13, and two adjacent hoops 13 are connected by connecting rods 11. The hoops 13 are formed by butting two U-shaped plates together, and the connection is fixed by bolts 10. The specific number of hoops 13 is determined according to actual conditions.

[0059] The hoop 13 is located at the connection between the two square pile groups to strengthen the strength of the connection.

[0060] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A prestressed square pile connection structure, characterized in that: The invention comprises concrete poured at both ends of the hollow square pile, one of the concretes being integrally poured with a pin steel pipe, the pin steel pipe being concentrically arranged with the hollow square pile and the outer end extending out of the hollow square pile; and the other concrete being reserved with a steel pipe slot for cooperating with the pin steel pipe; A plurality of plug rods are symmetrically arranged on one end of the hollow square pile close to the bolt steel pipe, and a slot for matching with the plug rods is arranged at the other end of the hollow square pile; The pin steel pipes and the steel pipe slots of two adjacent hollow square piles cooperate with each other and a connecting steel plate is provided between the two hollow square piles, and the connecting steel plate is sleeved on the pin steel pipes.

2. The prestressed square pile connection structure according to claim 1, characterized in that: The length of the concrete is not less than 50 mm.

3. A method for bundling prestressed square piles as a compression structure, characterized in that: The specific steps are: S1. Pour concrete at both ends of the hollow square piles to be bundled. Concentrically set a pin steel pipe at one end and pour it together with the concrete, ensuring that the outer end of the pin steel pipe extends out of the hollow square pile. S2. Cast several plugs into the reserved holes at one end of the hollow square pile, with the plugs and the pin steel pipe located at the same end; S3. When pouring the other end of the hollow square pile, a steel pipe slot is reserved to match the pin steel pipe; S4, determining the number of hollow square piles in a single square pile group and arranging all the hollow square piles in a matrix; S5. Select connecting steel plates according to the number of hollow square piles in the square pile group, and sleeve the connecting steel plates onto all the bolt steel pipes and plug rods; S6. Connect two vertically adjacent square pile groups through a plug steel pipe and a plug rod to form a square pile group; S7. Distribute a plurality of square pile groups in a polygonal shape to form a compression structure, and connect the square pile groups via transverse connectors.

4. The method for bundling prestressed square piles as a compression structure according to claim 3, characterized in that: The working surfaces of two adjacent hollow square piles in a single square pile group are filled with epoxy resin.

5. The method for bundling prestressed square piles as a compression structure according to claim 4, characterized in that: The transverse connecting pieces are connected by hoops, and two adjacent hoops are connected by a connecting rod.

6. The method for bundling prestressed square piles as a compression structure according to claim 5, characterized in that: The hoop is located at the connection of two square pile groups.

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