Pile group structure for soft soil layer foundation construction

Abstract

The utility model provides a pile group structure for soft soil layer foundation construction, which comprises a bearing platform and pipe piles, a plurality of reinforcing blocks are arranged in the middle and at the bottom of each pipe pile, strip-shaped dredging holes are arranged on the outer sides of the reinforcing blocks, a connecting mechanism is arranged between the pipe piles, and the connecting mechanism is composed of a cross arm rod, two inclined arm rods and a fixing seat. The two inclined arm rods are fixed to the two ends of the cross arm rod respectively, and the fixing bases are arranged at one ends of the inclined arm rods. The reinforcing blocks reinforce the segmented positions of the pipe pile, meanwhile, the strip-shaped dredging holes are formed in the reinforcing blocks, when the pipe pile is inserted into a foundation pit, free water in the foundation pit can flow into a cavity in the pipe pile through the dredging holes, then the spiral blades are driven by the micro motor to rotate, sludge and water in the cavity are continuously pumped out, and therefore the pipe pile is prevented from being damaged. The water content around the conical pipe pile is reduced, the excess pore water pressure is effectively reduced, and therefore the soil squeezing effect on adjacent piles is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of foundation construction technology and relates to a pile group structure for foundation construction in soft soil layers. Background Technology

[0002] Precast pipe piles have the advantages of good pile body integrity, high bearing capacity, fast static pressure pile driving construction speed, low pollution and low noise. Therefore, they are widely used in areas with weak geology. In order to improve the bearing capacity of the foundation, most projects adopt group pile pipe pile foundations to meet the bearing capacity requirements. However, group pile pipe piles will generate a large soil squeezing effect during construction, causing the excess pore water pressure of the soil around the pile to rise sharply in a short period of time, which seriously disturbs the original soil of the foundation and thus damages the bearing capacity of the foundation.

[0003] Furthermore, as the soil is continuously compressed, each time a pile is inserted, the surrounding soil is pushed outwards, which in turn causes the pile to be slowly pushed by the soil, resulting in the pile shifting and requiring improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a pile group structure for foundation construction in soft soil layers, so as to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solution: a pile group structure for soft soil foundation construction, comprising a pile cap and pipe piles, wherein multiple pipe piles are fixedly installed at the bottom of the pile cap and are located inside the foundation pit, and multiple reinforcing blocks are provided at the middle and bottom positions of the pipe piles, wherein strip-shaped drainage holes are opened on the outer side of the reinforcing blocks and are connected to the inside of the pipe piles, and a connecting mechanism is provided between the pipe piles, wherein the connecting mechanism consists of a horizontal arm, two diagonal arms and a fixing seat, wherein the two diagonal arms are respectively fixed at both ends of the horizontal arm, and the fixing seat is located at one end of the diagonal arm and is installed at the top position of the reinforcing block.

[0006] In the above-mentioned pile group structure for soft soil foundation construction, a welding seat is provided on the top side of the pile cap, and the top of the pipe pile is welded inside the welding seat.

[0007] In the above-mentioned pile group structure for soft soil foundation construction, a discharge chute is provided at the top center of the pile cap, and a discharge port is provided at the top of the pipe pile.

[0008] In the above-mentioned pile group structure for soft soil foundation construction, a motor frame is provided on the top of the welding seat, a micro motor is installed on the top of the motor frame, and the output end of the micro motor is connected to a rotating rod, the bottom end of the rotating rod is connected to the helical blade inside the pipe pile.

[0009] In the aforementioned pile group structure for soft soil foundation construction, a support frame is provided at the bottom of the pile cap, and the cross arm is located inside the support frame.

[0010] In the above-mentioned pile group structure for soft soil foundation construction, a fixing hole is provided on the outer side of the reinforcing block, and a locking screw is threaded on the outer side of the fixing seat. One end of the locking screw passes through the fixing seat and is threaded into the fixing hole.

[0011] Compared with existing technologies, the advantages of this utility model for constructing a pile group structure in soft soil foundations are as follows:

[0012] 1. This application sets a reinforcing block on the outside of the pipe pile to reinforce the segment of the pipe pile. At the same time, the reinforcing block is provided with a strip-shaped drainage hole. When the pipe pile is inserted into the foundation pit, the free water in the foundation pit can flow into the cavity inside the pipe pile through the drainage hole. Then, the micro motor drives the spiral blade to rotate, continuously pumping out the silt and water in the cavity, reducing the water content around the tapered pipe pile, effectively reducing the excess pore water pressure, thereby reducing the soil squeezing effect on adjacent piles.

[0013] 2. This application sets up a connection mechanism between adjacent pipe piles. The inclined arm rods on both sides of the connection mechanism are fixed to the reinforcing block by the fixing seat, and the horizontal arm rod is fixed inside the support frame at the bottom of the pile cap. In this way, the connection mechanism can effectively support and reinforce the two adjacent pipe piles, thereby avoiding the pipe piles from being squeezed by the soil and causing displacement, and improving the connection firmness between the pipe piles. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a pile group structure for foundation construction in soft soil layers according to this utility model.

[0015] Figure 2 This is an enlarged structural diagram of the reinforcing block of a pile group structure for soft soil foundation construction according to this utility model.

[0016] Figure 3 This is a schematic diagram of the connection mechanism of a pile group structure for soft soil foundation construction according to this utility model.

[0017] In the diagram, 1. Foundation; 2. Pipe pile; 3. Reinforcing block; 4. Discharge chute; 5. Welding seat; 6. Discharge port; 7. Motor frame; 8. Micro motor; 9. Rotating rod; 10. Strip-shaped guide hole; 11. Fixed seat; 12. Diagonal arm; 13. Locking screw; 14. Support frame; 15. Cross arm. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] A pile group structure for soft soil foundation construction includes a pile cap 1 and pipe piles 2. Multiple pipe piles 2 are fixedly installed at the bottom of the pile cap 1 and are located inside the foundation pit. Multiple reinforcing blocks 3 are installed at the middle and bottom of each pipe pile 2. Strip-shaped drainage holes 10 are formed on the outer side of each reinforcing block 3 and communicate with the interior of each pipe pile 2. A connecting mechanism is provided between the pipe piles 2. The connecting mechanism consists of a horizontal arm 15, two inclined arms 12, and a fixing seat 11. 2 are respectively fixed at both ends of the horizontal arm 15, and the fixing seat 11 is set at one end of the inclined arm 12. The fixing seat 11 is installed at the top of the reinforcing block 3. The pipe pile 2 of this application is a conical metal structure, and its inner diameter gradually decreases from top to bottom. This makes it easy to insert into the foundation pit, and the conical structure can increase the contact area with the soil, thereby improving the load transfer capacity and enhancing the bearing capacity of the foundation. The reinforcing block 3 is set at the diameter change of the pipe pile 2, and four sets are symmetrically arranged.

[0020] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model discloses a pile group structure for soft soil foundation construction. Specifically, a welding seat 5 is provided on the top side of the pile cap 1. The top of the pipe pile 2 is welded inside the welding seat 5. When installing the pipe pile 2, its top passes through the pile cap 1 and is inserted into the welding seat 5. Then, the pipe pile 2 is directly welded inside the welding seat 5.

[0021] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model discloses a pile group structure for the construction of a foundation in a soft soil layer. Specifically, a discharge trough 4 is provided at the top center of the pile cap 1, and a discharge port 6 is provided at the top of the pipe pile 2. The silt and water brought out from inside the pipe pile 2 can be discharged through the discharge port 6 and then guided away through the discharge trough 4.

[0022] like Figure 1 , Figure 2 , Figure 3As shown, this utility model discloses a pile group structure for soft soil foundation construction. Specifically, a motor frame 7 is provided on the top of the welding base 5, and a micro motor 8 is installed on the top of the motor frame 7. The output end of the micro motor 8 is connected to a rotating rod 9, and the bottom end of the rotating rod 9 is connected to the spiral blade inside the pipe pile 2. The motor frame 7 is a detachable structure, and the two support legs at the bottom are fixed to the welding base 5 with screws. It can be installed when drainage is needed inside the pipe pile 2. The micro motor 8 is a commercially available device known to those skilled in the art. Here, we are only using it without making any structural or functional improvements, so we will not go into detail here. The micro motor 8 can drive the spiral blade to rotate. When the spiral blade rotates, it can continuously carry out the silt and water inside the pipe pile 2, reduce the water content around the pipe pile 2, effectively reduce the excess pore water pressure, and thus reduce the soil squeezing effect on adjacent piles.

[0023] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model discloses a pile group structure for construction of soft soil foundation. Specifically, a support frame 14 is provided at the bottom of the pile cap 1, and a cross arm 15 is provided inside the support frame 14. The support frame 14 mainly reinforces and supports the middle part of the connecting mechanism.

[0024] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model discloses a pile group structure for soft soil foundation construction. Specifically, the outer side of the reinforcing block 3 is provided with a fixing hole, and the outer side of the fixing seat 11 is threaded with a locking screw 13. One end of the locking screw 13 passes through the fixing seat 11 and is threaded into the fixing hole. When the fixing seat 11 is installed, it can be locked by the locking screw 13.

[0025] This utility model discloses a pile group structure for soft soil foundation construction. When installing the pipe pile 2, its top passes through the pile cap 1 and is inserted into the welding seat 5. Then, the pipe pile 2 is directly welded into the welding seat 5. After the pipe pile 2 is installed, a connecting mechanism is fixed between adjacent pipe piles 2. During installation, one end of the inclined arm 12 of the connecting mechanism is positioned towards the reinforcing block 3, and then the fixing seat 11 is pressed onto the reinforcing block 3. The reinforcing block 3 is locked by the locking screw 13. The horizontal arm 15 of the connecting mechanism is located inside the support frame 14 and is limited and supported by the support frame 14. The horizontal arm 15 is installed and fixed again inside the support frame 14 by screws. In this way, the fixing of the entire pipe pile 2 is completed.

[0026] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A pile group structure for construction on soft soil foundations, comprising a pile cap (1) and pipe piles (2), characterized in that, Multiple pipe piles (2) are fixedly installed at the bottom of the foundation (1), and the multiple pipe piles (2) are set inside the foundation pit. Multiple reinforcing blocks (3) are set at the middle and bottom of the pipe piles (2). A strip-shaped drainage hole (10) is opened on the outside of the reinforcing block (3), and the strip-shaped drainage hole (10) is connected to the inside of the pipe pile (2). A connecting mechanism is set between the pipe piles (2). The connecting mechanism consists of a horizontal arm (15), two inclined arms (12) and a fixing seat (11). The two inclined arms (12) are fixed at both ends of the horizontal arm (15), and the fixing seat (11) is set at one end of the inclined arm (12). The fixing seat (11) is installed at the top of the reinforcing block (3).

2. The pile group structure for soft soil foundation construction according to claim 1, characterized in that, The top side of the foundation (1) is provided with a welding seat (5), and the top of the pipe pile (2) is welded inside the welding seat (5).

3. The pile group structure for soft soil foundation construction according to claim 1, characterized in that, A discharge trough (4) is provided at the top center of the foundation (1), and a discharge port (6) is provided at the top of the pipe pile (2).

4. A pile group structure for soft soil foundation construction according to claim 2, characterized in that, The welding seat (5) is provided with a motor frame (7) on top, and a micro motor (8) is installed on the top of the motor frame (7). The output end of the micro motor (8) is connected to a rotating rod (9), and the bottom end of the rotating rod (9) is connected to the spiral blade inside the pipe pile (2).

5. A pile group structure for soft soil foundation construction according to claim 1, characterized in that, The bottom of the platform (1) is provided with a support frame (14), and the cross arm (15) is located inside the support frame (14).

6. A pile group structure for soft soil foundation construction according to claim 1, characterized in that, The reinforcing block (3) has a fixing hole on its outer side, and the fixing seat (11) is threaded with a locking screw (13) on its outer side. One end of the locking screw (13) passes through the fixing seat (11) and is threaded into the fixing hole.

Images