Support pile supporting device and construction method

Abstract

This invention relates to the technical field of deep foundation pit construction, and in particular to a support pile support device and construction method. The device includes several connecting bolts, several expansion bolts, four pins, a fixing device, a soil layer, a support pile, and two tensile anchor cables. Both tensile anchor cables are fixedly connected to the interior of the soil layer. The fixing device includes an anchor bolt connector, two steel struts (first type) and two steel struts (second type). One end of each of the two steel struts (first type) and one end of each of the two steel struts (second type) are detachably connected to the outer surface of the anchor bolt connector. This invention features a detachable fixing device that connects the tensile anchor cables and the support pile, ensuring the stability of the support pile and replacing the function of a horizontal wainscoting. Furthermore, after use, this device can be disassembled and reused, saving money, reducing the expenditure on forging multiple horizontal wainscotings, avoiding waste of shaped steel materials, and eliminating the single-use limitation of horizontal wainscotings.

Description

Technical Field

[0001] This invention relates to the technical field of deep foundation pit construction, and in particular to a support pile device and construction method. Background Technology

[0002] Currently, in the design of deep foundation pit support, support piles are often used to retain the soil layers around the foundation pit. To improve the support and soil retention capacity of the piles, a horizontal wainscoting is usually added to the middle and upper part of the support pile to ensure the stability of the pile under the horizontal thrust of the soil. This wainscoting is used as the support point for pile calculation in the support calculation. Finally, the horizontal steel is fixed by tensile anchor cables implanted in the soil. This approach has reasonable stress distribution and simple construction, and is a commonly used conventional support pile support device.

[0003] However, once construction is completed, the horizontal wainscoting can only be used once, which can easily lead to a waste of steel materials. Summary of the Invention

[0004] To reduce the waste of steel materials, this invention provides a support pile device and construction method.

[0005] The present invention provides a support pile support device and construction method, which adopts the following technical solution: A support pile support device includes several connecting bolts, several expansion bolts, four pins, a fixing device, a soil layer, a support pile, and two tensile anchor cables. The two tensile anchor cables are fixedly connected to the interior of the soil layer. The fixing device includes an anchor bolt connector, two steel struts (first type) and two steel struts (second type). One end of the two steel struts (first type) and one end of the two steel struts (second type) can be detachably connected to the outer surface of the anchor bolt connector.

[0006] By adopting the above technical solution, the fixing device is connected to the support pile through connecting bolts and expansion bolts, thereby assisting the support pile to resist the horizontal thrust from the soil layer. After the foundation pit construction is completed, the fixing device can be removed for convenient use in the next construction.

[0007] Preferably, the ends of the two steel struts 1 away from the anchor bolt connector and the ends of the two steel struts 2 away from the anchor bolt connector are all fixedly connected to end plates, and one side of each end plate overlaps one side of the support pile; one end of each of the two tensile anchor cables passes through the end of the corresponding steel strut 1 near the end plate, and each of the two tensile anchor cables is connected to the end plate by a number of connecting bolts.

[0008] By adopting the above technical solution, both steel strut 1 and steel strut 2 are connected to the tensile anchor cable and the support pile respectively through end plates to protect the end of steel strut 1 and steel strut 2 that is close to the support pile. If the end of steel strut 1 and steel strut 2 connected to the support pile cannot bear the force due to too many holes, it needs to be cut before use, which not only prolongs the construction time, but also wastes some of the materials of steel strut 1 and steel strut 2.

[0009] Preferably, the end plates of the two steel struts at one end are detachably connected to the support pile by a number of expansion bolts. The four sides of the anchor bolt connector are fixedly connected with ear plates, and each ear plate has a through hole. The ends of the two steel struts near the anchor bolt connector and the ends of the two steel struts near the anchor bolt connector are connected to the corresponding through holes by corresponding pins, and each pin is located inside the corresponding ear plate.

[0010] By adopting the above technical solution, the expansion bolts, connecting bolts, and pins are all detachable, which facilitates the assembly and disassembly of the anchor bolt connectors, steel strut one, steel strut two, tensile anchor cables, and support piles, making the fixing device more modular and convenient for transportation.

[0011] Preferably, one end of each of the two steel struts and the two steel struts are arranged alternately around the anchor bolt connector.

[0012] By adopting the above technical solution, the uniformly alternating distribution of steel struts one and two can help the fixing device assist the support piles in stabilizing the soil around the foundation pit.

[0013] A method for constructing a retaining pile support includes the following steps: Step A, assembling the fixing device; Step B, placing the fixing device in the foundation pit and connecting the tensile anchor cable; Step C, disassembling the fixing device after construction is completed.

[0014] Preferably, in step A, the specific construction steps of assembling the fixing device include: two steel struts (type 1) and two steel struts (type 2) are alternately arranged around the anchor bolt connector; pins are inserted into the interior of one end of the two steel struts (type 1) and one end of the two steel struts (type 2), and then the pins are locked to the ear plate connected to the anchor bolt connector.

[0015] Preferably, in step B, the specific construction steps for placing the fixing device and connecting the tensile anchor cable in the foundation pit include: adjusting the position of the fixing device so that the four end plates are tightly attached to one side of the support pile; one end of the tensile anchor cable passes through the soil layer, the support pile, and the interior of the end plate of the two steel struts; the connecting bolt passes through the end of the tensile anchor cable near the steel strut and the interior of the corresponding two end plates; the connecting bolt is locked to the outer surface of the two end plates; the expansion bolt passes through the interior of the other two end plates and the interior of the support pile; the expansion bolt is locked to the outer surface of the two end plates.

[0016] Preferably, in step C, the specific construction steps for disassembling the fixing device include: loosening the connecting bolts, expansion bolts, and pins respectively; disconnecting the connection between the two tensile anchor cables and the two steel struts; disconnecting the connection between the support piles and the two steel struts; disconnecting the connection between the four end plates and the two steel struts; and disconnecting the connection between the four ear plates and the two steel struts.

[0017] By adopting the above technical solution, the tensile anchor cable and the support pile are connected by a fixing device to ensure the stability of the support pile. At the same time, the fixing device can be removed and reused after use.

[0018] In summary, the present invention has the following beneficial technical effects: 1. This invention features a detachable fixing device that connects the tensile anchor cable and the support pile, ensuring the stability of the support pile and replacing the function of the horizontal wainscoting. Furthermore, after use, this device can be disassembled and reused, saving money, reducing the expenditure on forging multiple horizontal wainscotings, and avoiding waste of shaped steel materials, unlike horizontal wainscoting which can only be used once, thus avoiding steel material waste. The fixing device has a simple structure, facilitating assembly line production, transportation to the destination for reassembly, and simplifying production and transportation.

[0019] 2. This invention provides stable stress distribution. The tensile anchor rod is fixed to the anchor rod connector by connecting bolts. One end of each of the two steel struts is fixed to the ear plate of the anchor rod connector by connecting pins. The other ends of the two symmetrically arranged steel struts are fixed to the support pile to bear the pressure of the support pile and ensure the stability of the support pile. The other ends of the other two symmetrically arranged steel struts are fixed to the tensile anchor cable to bear the tension of the anchor cable and ensure that the tension is transmitted to the support pile. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of a support pile support device according to the present invention.

[0021] Figure 2 yes Figure 1 A sectional view along line AA. Figure 3 This is a schematic diagram of the structure after the support piles are combined with the foundation pit in this invention; Figure 4 yes Figure 3 Sectional view along line BB; Figure 5 This is a structural schematic diagram of the anchor bolt connector in this invention; Figure 6 yes Figure 5 A cross-sectional view along the CC line; Figure 7 yes Figure 5 A sectional view along the DD line; Figure 8 yes Figure 6 A cross-sectional view along the EE line.

[0022] Explanation of reference numerals in the attached drawings: 1. Anchor bolt connector; 2. Pin; 3. Steel strut one; 4. Steel strut two; 5. Ear plate; 6. End plate; 7. Fixing point between steel strut and anchor cable; 8. Fixing device; 9. Foundation pit; 10. Support pile; 11. Crown beam; 12. Soil layer; 13. Tensile anchor cable. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-8 The present invention will be described in further detail below.

[0024] This invention discloses a support device for retaining piles, referring to... Figure 1 , 2 3, 4, 5, including several connecting bolts, several expansion bolts, four pins 2, fixing device 8, soil layer 12, support piles 10, and two tensile anchor cables 13. A cap beam 11 is connected to one side of the support piles 10. The expansion bolts and pins 2 are detachable. Both tensile anchor cables 13 are fixedly connected to the interior of the soil layer 12. The fixing device 8 includes an anchor bolt connector 1, two steel struts 1 3 and two steel struts 2 4. One end of each of the two steel struts 1 3 and one end of each of the two steel struts 2 4 can be detachably connected to the outer surface of the anchor bolt connector 1. One end of the steel strut 2 without end plate 6 is connected to the opening of the ear plate 5 through the connecting pin 2; the tensile anchor cable 13 passes through one end of the steel strut 2 with end plate 6 and is connected to the end plate 6 through the connecting bolt, which provides tension to the anchor bolt connector 1; one end of the steel strut 2 with end plate 6 is fixed to the support pile 10 through the expansion bolt, and when the support pile 10 is under the pressure of the soil layer 12, the pressure of the soil layer 12 is transferred to the steel strut 2; finally, the tension of the steel strut 1 3 and the pressure of the steel strut 2 4 are transferred to the anchor bolt connector 1, so as to realize the stability of the support pile 10 under the pressure of the soil layer 12.

[0025] Reference Figure 1 ,3 4. End plates 6 are fixedly connected to the ends of the two steel struts 1-3 away from the anchor bolt connector 1 and the ends of the two steel struts 2-4 away from the anchor bolt connector 1. One side of each end plate 6 overlaps one side of the support pile 10. The steel strut 1-3 cannot be directly connected to the tensile anchor cable 13. Figure 3 , 4 In the diagram, the fixing point 7 of the steel strut and anchor cable is located on one side of the support pile. The end plate 6 can help indirectly connect the steel strut 13 and the tensile anchor cable 13, avoiding damage to one end of the steel strut 13. The end plate 6 also facilitates the repeated drilling of multiple connection holes as needed when connecting with the tensile anchor cable 13 and the support pile 10. Compared with the wear and tear on one end of the steel strut 13 and the steel strut 24, which requires cutting off the damaged end for reuse, using the end plate 6 is more cost-effective. One end of each of the two tensile anchor cables 13 passes through the end of the corresponding steel strut 13 near the end plate 6. Both tensile anchor cables 13 are connected to the end plate 6 by several connecting bolts.

[0026] Reference Figure 3 , 4 The two end plates 6 located at one end of the steel strut 2 4 are detachably connected to the support pile 10 by several expansion bolts. The expansion bolts are existing detachable expansion bolts. The support pile 10 needs to block the horizontal thrust given by the soil layer around the foundation pit 9.

[0027] Reference Figure 5 , 6 7, 8, The four sides of the anchor bolt connector 1 are fixedly connected with ear plates 5. Each ear plate 5 has a through hole. The ends of the two steel struts 1 and 2 near the anchor bolt connector 1 and the ends of the two steel struts 4 near the anchor bolt connector 1 are connected to the corresponding through holes through the corresponding pins 2. Each pin 2 is located inside the corresponding ear plate 5. The two steel struts 1 and 2 steel struts 4 provide tension to the anchor bolt connector 1 through the pins 2.

[0028] Reference Figure 2 , 5 6, 7, one end of the two steel struts 1 and 2 are arranged alternately around the anchor bolt connector 1. This facilitates the transmission of the tension of the steel strut 1 and the pressure of the steel strut 2 to the anchor bolt connector 1, balancing them and ensuring that the support pile 10 remains stable under the horizontal thrust of the soil layer 12, thus improving the support and retaining capacity of the support pile 10.

[0029] This invention also discloses a method for constructing retaining piles, referring to... Figure 1 , 2Steps 3 and 4 include the following steps: Step A: Assemble the fixing device 8; Step B: Place the fixing device 8 in the foundation pit 9 and connect the tensile anchor cable 13; Step C: After the construction is completed, disassemble the fixing device 8. Assemble the fixing device 8. First, connect one end of the steel strut 1 3 and the steel strut 2 4 without end plate 6 to the opening of the ear plate 5 through the connecting pin 2. Then connect the fixing device 8 to the soil layer 12 at the designated location. Pass the tensile anchor cable 13 through one end of the steel strut 2 4 with end plate 6 and connect it to the end plate 6 through the connecting bolt. One end of the steel strut 2 4 with end plate 6 is fixed to the support pile 10 through the expansion bolt. When the support pile 10 is subjected to the pressure of the soil layer 12, the pressure of the soil layer 12 is transmitted to the steel strut 2 4.

[0030] In step A, the specific construction steps for assembling the fixing device 8 include: two steel struts 1-3 and two steel struts 2-4 are alternately arranged around the anchor bolt connector 1; pins 2 are inserted into the interior of one end of the two steel struts 1-3 and one end of the two steel struts 2-4, and then the pins 2 are locked onto the ear plate 5 connected to the anchor bolt connector 1.

[0031] Reference Figure 3 , 4 In step B, the specific construction steps for placing the fixing device 8 in the foundation pit 9 and connecting the tensile anchor cable 13 include: adjusting the position of the fixing device 8 so that the four end plates 6 are tightly attached to one side of the support pile 10; one end of the tensile anchor cable 13 passes through the soil layer 12, the support pile 10, and the interior of the end plates 6 of the two steel struts 1-3; the connecting bolt passes through the end of the tensile anchor cable 13 near the steel strut 1-3 and the interior of the corresponding two end plates 6; the connecting bolt is locked to the outer surface of the two end plates 6; the expansion bolt passes through the interior of the other two end plates 6 and the interior of the support pile 10; the expansion bolt is locked to the outer surface of the two end plates 6. After the fixing device 8 is assembled and connected to the support pile 10 and the soil layer 12, the tension of the steel strut 1-3 and the pressure of the steel strut 2-4 are transmitted to the anchor connector 1, which is beneficial to the stability of the support pile 10 under the pressure of the soil layer 12.

[0032] Reference Figure 1 , 3 In step C, the specific construction steps for disassembling the fixing device 8 include: loosening the connecting bolts, expansion bolts, and pins 2 respectively; disconnecting the connection between the two tensile anchor cables 13 and the two steel struts 1-3; disconnecting the connection between the support pile 10 and the two steel struts 2-4; disconnecting the connection between the four end plates 6 and the two steel struts 1-3 and 2-4; and disconnecting the connection between the four ear plates 5 and the two steel struts 1-3 and 2-4. After use, the fixing device 8 can be removed and reused in the next area, which helps to save money.

[0033] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A support device for retaining piles, characterized in that: It includes several connecting bolts, several expansion bolts, four pins (2), a fixing device (8), a soil layer (12), a support pile (10), and two tensile anchor cables (13). The two tensile anchor cables (13) are fixedly connected to the inside of the soil layer (12). The fixing device (8) includes an anchor bolt connector (1), two steel struts (3) and two steel struts (4). One end of the two steel struts (3) and one end of the two steel struts (4) can be detachably connected to the outer surface of the anchor bolt connector (1). End plates (6) are fixedly connected to one end of the two steel struts (3) away from the anchor bolt connector (1) and one end of the two steel struts (4) away from the anchor bolt connector (1). One side of each end plate (6) overlaps one side of the support pile (10). One end of each of the two tensile anchor cables (13) passes through the end of the corresponding steel strut (3) near the end plate (6), and both tensile anchor cables (13) are connected to the end plate (6) by several connecting bolts; The two end plates (6) located at one end of the steel strut (4) are detachably connected to the support pile (10) by several expansion bolts; The anchor bolt connector (1) is fixedly connected to ear plates (5) on all four sides. Each ear plate (5) has a through hole. The ends of the two steel struts (3) near the anchor bolt connector (1) and the ends of the two steel struts (4) near the anchor bolt connector (1) are connected to the corresponding through holes through corresponding pins (2). Each pin (2) is located inside the corresponding ear plate (5).

2. The support device for retaining piles according to claim 1, characterized in that: One end of the two steel struts (3) and the two steel struts (4) are arranged alternately around the anchor bolt connector (1).

3. A method for constructing retaining piles, characterized in that, Construction using the support pile device according to claim 1 or 2 includes the following steps: Step A: Assemble the fixing device (8); The specific construction steps include: two steel struts (3) and two steel struts (4) are alternately arranged around the anchor bolt connector (1); insert pins (2) into the inside of one end of the two steel struts (3) and one end of the two steel struts (4), and then lock the pins (2) onto the ear plate (5) connected to the anchor bolt connector (1); Step B: Place a fixing device (8) in the foundation pit (9) and connect the tensile anchor cable (13); the specific construction steps include: adjusting the position of the fixing device (8), with the four end plates (6) tightly attached to one side of the support pile (10); one end of the tensile anchor cable (13) passes through the soil layer (12), the support pile (10), and the interior of the end plate (6) of the two steel struts (3), and the connecting bolt passes through the end of the tensile anchor cable (13) near the steel strut (3) and the interior of the corresponding two end plates (6), and the connecting bolt is locked to the outer surface of the two end plates (6); the expansion bolt passes through the interior of the other two end plates (6) and the interior of the support pile (10), and the expansion bolt is locked to the outer surface of the two end plates (6); Step C: After construction is completed, dismantle the fixing device (8).

4. The construction method for support piles according to claim 3, characterized in that, The specific construction steps of step C include: loosening the connecting bolts, expansion bolts and pins (2) respectively, disconnecting the connection between the two tensile anchor cables (13) and the two steel struts (3), disconnecting the connection between the support pile (10) and the two steel struts (4), disconnecting the connection between the four end plates (6) and the two steel struts (3) and the two steel struts (4), and disconnecting the connection between the four ear plates (5) and the two steel struts (3) and the two steel struts (4).

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