Inclined support pile construction device for foundation pit support structure

Abstract

The present invention discloses a diagonal bracing pile construction device for a foundation pit support structure, comprising a base and a pile delivery mechanism, wherein an inclination angle adjustment mechanism and a lifting mechanism are arranged between the pile delivery mechanism and the base, wherein the pile delivery mechanism comprises a frame and two transmission modules, wherein the two transmission modules are arranged at intervals and have a gap, wherein the transmission module comprises a chain belt, a steering gear, and a driving gear, wherein the chain belt is evenly arranged with a plurality of movable limit pins at intervals along its circumference, wherein the movable limit pins can be telescopically moved along its axial direction and plugged and locked with the through groove of the diagonal bracing pile, wherein the chain belt comprises a straight transmission section, and the frame is provided with a guide module. The present invention provides a diagonal bracing pile construction device for a foundation pit support structure, which has a simple structure, is easy to operate, and can speed up the construction speed.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support construction equipment, and in particular to a diagonal support pile construction device for a foundation pit support structure. Background Art

[0002] With the rapid development of social and economic construction and the acceleration of urbanization, the urban population and scale have expanded dramatically. Problems such as old city renovation and new city planning have led to an increasing contradiction between the expansion of urban building space and the shortage of available land resources. In order to effectively solve this problem, construction projects in major cities around the world have begun to expand towards the three-dimensional space of "space-ground-underground". The first problem faced in the rational development and utilization of underground space is the construction of deep foundation pits. Horizontal internal support is the most common deep foundation pit support method in soft soil areas. With the construction of underground structures, most of the horizontal internal supports have to be removed, and this process requires a large amount of steel bars, concrete and other building materials, which is a veritable "carbon tiger". In this context, a new form of pile support, namely inclined support piles, began to be used in foundation pit support projects. The inclined bracing pile is based on the traditional row pile support. The prefabricated pile body is implanted into the foundation pit by oblique mixing, and the cement mixing reinforcement body is formed around the pile body below the foundation bottom plate by two methods: high-pressure rotary spraying or forced mixing grouting. Finally, a triangular stable support system is formed in which the row piles, inclined bracing piles, and base soil jointly resist the soil pressure outside the foundation pit. Compared with the traditional horizontal internal support technology, the inclined bracing pile support technology has the advantages of saving construction time, one-time open excavation to the bottom of the pit, reducing the amount of reinforced concrete, and reducing the project cost.

[0003] A Chinese invention patent application discloses a diagonal brace pile support structure and a construction method thereof (CN116479907A). The patent document discloses a foundation pit support structure using diagonal brace piles. In the patent document, the diagonal brace piles are prefabricated piles. During construction, the prefabricated diagonal brace piles need to be obliquely inserted into a pre-dug temporary pit by a pile delivery device. The pile delivery device mainly includes two hydraulic rods, two limit rods, two hoop plates and other components. The two hoop plates and two limit rods enclose a limit interval, and the prefabricated diagonal piles are clamped in the limit interval. The prefabricated diagonal piles are clamped and limited by the limit interval, reducing the possibility of the prefabricated diagonal piles being loosened or offset during the pile delivery process, thereby ensuring the accuracy of the inclination angle during implantation. When the prefabricated diagonal piles are implanted into the soil, the inclination angle of the hydraulic rod is adjusted by a hydraulic push rod. During the pile delivery process, the diagonal brace piles are pulled along the set angle and inserted into the temporary pit by the cooperation of the iron chain and the hook. However, the construction method described in the patent document has the following defects: during pile delivery construction, the hydraulic push rod needs to be frequently extended and retracted, and the matching positions of the hook and the clamp plate need to be frequently changed. In order to prevent the diagonal support pile from moving on its own under the action of gravity, it is usually necessary to cooperate with a crane to pull and support the rear end of the diagonal support pile. The crane can also prevent the rear end of the diagonal support pile from shifting. The construction operation is relatively cumbersome and the construction takes a long time.

[0004] The structure of the prefabricated diagonal bracing pile in the prior art is as follows: Figure 1 , 2 As shown, it includes four L-shaped angle steels 11 arranged at the four end positions of the rectangle, a plurality of gusset plates 12 welded and arranged between adjacent L-shaped angle steels 11 at intervals along the length direction of the L-shaped angle steels 11, and a through groove 13 is formed between the adjacent L-shaped angle steels 11 and the gusset plates 12. Summary of the invention

[0005] The invention provides a diagonal bracing pile construction device for a foundation pit supporting structure which has a simple structure, is easy to operate and can accelerate the construction speed.

[0006] The diagonal brace pile construction device of the foundation pit support structure of the present invention comprises a base and a pile delivery mechanism, wherein an inclination angle adjustment mechanism and a lifting mechanism are arranged between the pile delivery mechanism and the base, respectively used to adjust the inclination angle and height of the pile delivery mechanism, so as to realize the adjustment of the pile delivery direction, the pile delivery mechanism comprises a frame and two transmission modules arranged on the frame, the two transmission modules are arranged at intervals and form a gap for the diagonal brace piles to be placed, the transmission module comprises a chain belt, a steering gear cooperating with the chain belt for steering, and a driving gear for driving the chain belt to cyclically rotate, the chain belt is evenly arranged with a plurality of movable limit pins at intervals along its circumference, The telescopic movement direction of the movable limit pin is perpendicular to the movement direction of the chain belt. The movable limit pin can telescopically move along its axial direction and be plugged and locked with the through slot of the diagonal support pile. When multiple movable limit pins are plugged and locked with the through slot of the diagonal support pile, support for the diagonal support pile can be achieved. The chain belt includes a straight line transmission section, and the frame is provided with a guide module at the straight line transmission section corresponding to the chain belt. The guide module is used to drive the movable limit pin to produce axial telescopic movement when it moves along the straight line transmission section of the chain belt, thereby locking the diagonal support pile at the starting end of the straight line transmission section of the chain belt, and unlocking the diagonal support pile at the end end of the straight line transmission section of the chain belt.

[0007] During construction, the prefabricated diagonal bracing piles are fixedly installed on the pile delivery mechanism, and the diagonal bracing piles are kept in a position corresponding to the straight transmission section of the chain belt. Then, the inclination angle and height of the pile delivery mechanism are adjusted through the inclination angle adjustment mechanism and the lifting mechanism, so that the diagonal bracing piles are obliquely aligned with the pre-dug temporary pit. Then, the chain belt is driven to move by the driving gear. The chain belt can drive the diagonal bracing piles along the conveying direction corresponding to the straight transmission section of the chain belt and deliver them into the temporary pit. The entire pile delivery process is completed autonomously by the equipment. During the pile delivery process, the movable limit pin locks and unlocks the diagonal bracing piles through continuous telescopic movement, and stably guides the diagonal bracing piles into the pit. The construction operation is convenient and fast.

[0008] Furthermore, the chain belt is provided with a plurality of support seats evenly spaced along its circumference, the movable limit pin includes a connecting shaft movably plugged in with the support seat, a pin head arranged at one end of the connecting shaft, and a guide wheel arranged at the other end of the connecting shaft, the pin head is used for plugging in with the through groove of the diagonal support pile to lock or unlock, the guiding module includes a guide plate arranged on the frame, the guide plate is located on the side of the straight transmission section of the chain belt, the guide plate is provided with a guide groove, and the guide wheel cooperates with the guide wheel of the guide plate to guide the movement.

[0009] Furthermore, two ends of the guide plate and two ends of the straight transmission section of the chain belt are arranged at corresponding positions, and the guide groove of the guide plate includes a starting section, a holding section and an end section, and the starting section of the guide groove is provided with a first guide slope, and the first guide slope is used to cooperate with the guide wheel to drive the movable limit pin to be inserted into the through groove of the diagonal support pile, and the holding section of the guide groove includes two oppositely arranged side walls, and the two side walls of the holding section are arranged along the extension and contraction direction of the movable limit pin, and are used to cooperate with the guide wheel to keep the movable limit pin inserted in the through groove of the diagonal support pile, and the cooperation of the two side walls and the guide wheel can prevent the movable limit pin from axial movement during the pile sending process, thereby improving the reliability of the equipment, and the end section of the guide groove includes a second guide slope, and the second guide slope is used to cooperate with the guide wheel to drive the movable limit pin to escape from the through groove of the diagonal support pile.

[0010] When the guide wheel of the movable stop pin follows the chain belt to move to the starting section of the guide groove, the pin head of the movable stop pin is driven to be inserted into the through groove of the diagonal support pile by cooperating with the first guide inclined surface; when the guide wheel of the movable stop pin moves along the holding section, the two side walls are used to limit the guide wheel, prohibiting the telescopic movement of the movable stop pin; when the guide wheel of the movable stop pin moves to the end section, the second guide inclined surface is used to drive the movable stop pin to disengage from the through groove of the diagonal support pile. The pile delivery process is achieved by cooperating with multiple movable stop pins and the through groove of the diagonal support pile.

[0011] Furthermore, the starting section of the guide groove is provided with two third guide slopes for vertically guiding the guide wheel to be inserted, which can improve the guiding effect of the guide wheel, avoid jamming due to interference between the ends of the guide wheel and the guide plate, improve the reliability of equipment operation, and prevent equipment damage.

[0012] Furthermore, the pin head has a columnar front end and a conical rear end, and a guide conical surface is provided at the front end of the pin head to improve the alignment and plug-in effect with the through groove of the diagonal support pile and reduce the requirements for matching accuracy.

[0013] Furthermore, the frame includes a slidable telescopic frame, and at least two steering gears are arranged on the telescopic frame. The straight transmission section of the chain belt is formed by linking one of the steering gears on the telescopic frame and the steering gear on the frame body. The length of the straight transmission section can be adjusted by sliding cooperation between the telescopic frame and the frame body, thereby improving the adaptability to diagonal support piles of different lengths. In addition, the storage and transportation of the device are also convenient.

[0014] Furthermore, the inclination angle adjustment mechanism and the lifting mechanism include a swing arm, a first push rod and a second push rod respectively rotatably connected to both sides of the swing direction of the swing arm, one end of the swing arm and the first push rod are rotatably connected to the base, the other end of the swing arm is rotatably connected to the frame, the other end of the first push rod is rotatably connected to the swing arm, and both ends of the second push rod are respectively rotatably connected to the frame and the swing arm, the first push rod drives the swing arm to rotate relative to the base to realize the lifting and lowering of the frame as a whole, and the second push rod drives the frame to rotate relative to the swing arm to realize the adjustment of the inclination angle of the frame.

[0015] Furthermore, the base and the vehicle are installed in coordination, so that the present invention and the vehicle can be combined together, which facilitates the transportation and construction of the equipment.

[0016] The beneficial effects of the present invention are as follows: compared with the existing construction device, the present invention is convenient and quick in construction operation, can insert the diagonal support piles into the pit smoothly and at a uniform speed, does not require frequent starting and stopping during the pile delivery process, and does not require frequent switching of the fixed position of the diagonal support piles, thereby reducing manual operations and having higher construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side view of a prefabricated diagonal bracing pile in the prior art;

[0018] Figure 2 It is a cross-sectional view of a prefabricated diagonal bracing pile in the prior art;

[0019] Figure 3 This is a first use state diagram of an embodiment of the present invention;

[0020] Figure 4 This is a second usage state diagram of an embodiment of the present invention;

[0021] Figure 5 It is a structural schematic diagram of a transmission module according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the coordination of the transmission module according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic structural diagram of a guide plate according to an embodiment of the present invention;

[0024] Figure 8 A cross-sectional view of a guide plate according to an embodiment of the present invention Figure 1 ;

[0025] Fig. 9 A cross-sectional view of a guide plate according to an embodiment of the present invention Figure 2 . DETAILED DESCRIPTION

[0026] The embodiment of the inclined support pile construction device of the foundation pit support structure of the present invention is as follows: Figure 3-9As shown: it includes a base 1 and a pile delivery mechanism 2, wherein an inclination angle adjustment mechanism and a lifting mechanism 3 are arranged between the pile delivery mechanism 2 and the base 1, which are respectively used to adjust the inclination angle and height of the pile delivery mechanism 2, so as to realize the adjustment of the pile delivery direction. The pile delivery mechanism 2 includes a frame 21 and two conveying modules 4 arranged on the frame 21, wherein the two conveying modules 4 are arranged at intervals and form a gap for the diagonal support piles to be placed, wherein the conveying module 4 includes a chain belt 41, a steering gear 42 cooperating with the chain belt 41 for steering, and a driving gear 43 for driving the chain belt 41 to cyclically rotate, wherein the chain belt 41 is evenly spaced along its circumferential direction with a plurality of movable limit pins 44, wherein the telescopic movement direction of the movable limit pin 44 is perpendicular to the movement direction of the chain belt 41, and the movable limit pin 44 is arranged at a predetermined position. It can move telescopically along its axial direction and be plugged and locked with the through groove of the diagonal support pile. When multiple movable limit pins 44 are plugged and locked with the through groove of the diagonal support pile, the diagonal support pile can be supported, thereby keeping the diagonal support pile on the conveying module 4. The chain belt 41 includes a straight conveying section 411. The frame 21 is provided with a guide module at the straight conveying section 411 corresponding to the chain belt 41. The guide module is used to drive the movable limit pin 44 to produce axial telescopic movement when it moves along the straight conveying section 411 of the chain belt 41, thereby forming a locking of the diagonal support pile at the starting end of the straight conveying section 411 of the chain belt 41, and unlocking the diagonal support pile at the ending end of the straight conveying section 411 of the chain belt 41. The directions of the starting end and the ending end of the straight conveying section 411 correspond to the direction of the pile delivery.

[0027] During construction, the prefabricated diagonal bracing pile is fixedly installed on the pile delivery mechanism 2, and the diagonal bracing pile is kept in a position corresponding to the straight conveying section 411 of the chain belt 41. Then, the inclination angle and height of the pile delivery mechanism 2 are adjusted by the inclination angle adjustment mechanism and the lifting mechanism 3, so that the diagonal bracing pile is obliquely aligned with the pre-dug temporary pit, and then the chain belt 41 is driven to move by the driving gear 43. The chain belt 41 can drive the diagonal bracing pile along the conveying direction corresponding to the straight conveying section 411 of the chain belt 41 to deliver it into the temporary pit. The entire pile delivery process is completed autonomously by the equipment. During the pile delivery process, the movable limit pin 44 locks and unlocks the diagonal bracing pile through continuous telescopic movement, and stably guides the diagonal bracing pile to be inserted into the pit. The construction operation is convenient and fast.

[0028] The chain belt 41 is evenly spaced along its circumference with a plurality of support seats 45. The chain belt 41 is composed of a plurality of groups of chain links 410 connected by end-to-end pivots. The support seats 45 are composed of extended portions of the chain links 410. Not all of the chain links 410 constituting the chain belt 41 have the extended portions. Chain links 410 with extended portions having corresponding intervals are configured according to the spacing between the through grooves of the diagonal support piles for connection with the movable stop pins 44. Each chain link 410 includes a groove for meshing with the teeth of the gear. The movable stop pins 44 include a connection for movably plugging with the support seats 45. A connecting shaft 441, a pin head 442 arranged at one end of the connecting shaft 441, and a guide wheel 443 arranged at the other end of the connecting shaft 441, the pin head 442 is used to cooperate with the through groove of the diagonal support pile to lock or unlock, a shaft sleeve is fixed on the extended part of the chain link 410, which is used to cooperate with the connecting shaft 441 of the movable limit pin 44 for axial movable connection, and the guiding module includes a guide plate 5 arranged on the frame 21, the guide plate 5 is located on the side of the straight transmission section 411 of the chain belt 41, and the guide plate 5 is provided with a guide groove 50, and the guide wheel 443 cooperates with the guide wheel 443 of the guide plate 5 for guiding movement.

[0029] The two ends of the guide plate 5 are arranged at corresponding positions with the two ends of the straight transmission section 411 of the chain belt 41. The guide groove 50 of the guide plate 5 includes a starting section 51, a holding section 52 and an ending section 53. The starting end of the guide groove 50 is provided with a first guide inclined surface 501, and the first guide inclined surface 501 is used to cooperate with the guide wheel 443 to drive the movable limit pin 44 to insert into the through groove of the diagonal support pile. The holding section 52 of the guide groove 50 includes two oppositely arranged side walls 502. The two side walls 502 of the holding section 52 are arranged along the extension and contraction direction of the movable limit pin 44, and are used to cooperate with the guide wheel to keep the movable limit pin inserted in the through groove of the diagonal support pile. The cooperation between the two side walls 502 and the guide wheel 443 can prevent the movable limit pin 44 from axial movement during the pile delivery process, thereby improving the reliability of the equipment. The ending section 53 of the guide groove 50 includes a second guide inclined surface 503, and the second guide inclined surface 503 is used to cooperate with the guide wheel 443 to drive the movable limit pin 44 to escape from the through groove of the diagonal support pile.

[0030] When the guide wheel 443 of the movable stop pin 44 follows the chain belt 41 to move to the starting end of the guide groove 50, the pin head 442 of the movable stop pin 44 is driven to be inserted into the through groove of the diagonal support pile by cooperating with the first guide slope 501; when the guide wheel 443 of the movable stop pin 44 moves along the retaining section 52, the guide wheel 443 is limited by the two side walls 502 to prohibit the telescopic movement of the movable stop pin 44; when the guide wheel 443 of the movable stop pin 44 moves to the end section 53, the movable stop pin 44 is driven to disengage from the through groove of the diagonal support pile by the second guide slope 503. The pile delivery process is realized by the cooperation of multiple movable stop pins 44 and the through groove of the diagonal support pile.

[0031] The guide plate 5 is detachably connected to the frame 21 , and the diagonal support piles can be conveniently fixedly installed on the pile delivery mechanism 2 at the beginning of construction.

[0032] The starting section of the guide groove 50 is provided with two third guide slopes 504 inserted along the vertical guiding guide wheel 443 and a fourth guide slope 505 arranged on the opposite side of the first guide slope 501, which can improve the guiding effect of the guide wheel 443, avoid jamming due to interference between the guide wheel 443 and the end of the guide plate 5, improve the reliability of the equipment operation, and prevent equipment damage.

[0033] In addition, an elastic component, such as a spring, can be provided on the basis of the above structure. The elastic component is sleeved on the movable limit pin 44 and abutted between the movable limit pin 44 and the support seat 45. The elastic component can be used to drive the movable limit pin 44 to reset and maintain the end point position of the axial movement. Such a design can reduce the shaking of the movable limit pin 44 during the movement of the chain belt 41, ensure the contact effect between the guide wheel 443 and the guide slope, and improve the stability of operation.

[0034] like Figure 6 As shown, the pin head 442 has a columnar front end 4421 and a tapered rear end 4422. The front end 4421 of the pin head 442 is provided with a guide tapered surface to improve the alignment and plugging effect with the through slot of the diagonal support pile and reduce the requirements for matching accuracy. The outer circumferential surface of the columnar front end 4421 and the side wall of the through slot of the diagonal support pile are in contact and support with each other.

[0035] The frame 21 includes a slidable telescopic frame 211, on which at least two steering gears 42 are arranged, and the linear transmission section 411 of the chain belt 41 is formed by linking one steering gear 1 421 on the telescopic frame 211 and a steering gear 2 422 on the main body of the frame 21. The chain belt 41 is connected in an S-shape between the telescopic frame 211 and the other two steering gears 3 423 of the main body of the frame 21, forming a chain belt telescopic section that can be reduced / increased as the length of the linear transmission section 411 increases. The length of the linear transmission section 411 is adjusted by sliding cooperation between the telescopic frame 211 and the main body of the frame 21, thereby improving the adaptability to the diagonal bracing piles of different lengths and the supporting effect of the diagonal bracing piles. In addition, the storage and transportation of the device are also convenient, especially when the pile delivery device is combined with a vehicle, it has a better effect and reduces the requirements for the vehicle size.

[0036] The tilt angle adjustment mechanism and lifting mechanism 3 include a swing arm 31, a first push rod 32 and a second push rod 33 which are rotatably connected to both sides of the swing direction of the swing arm 31, one end of the swing arm 31 and the first push rod 32 are rotatably connected to the base 1, the other end of the swing arm 31 is rotatably connected to the frame 21, the other end of the first push rod 32 is rotatably connected to the swing arm 31, and both ends of the second push rod 33 are rotatably connected to the frame 21 and the swing arm 31, respectively. The first push rod 32 drives the swing arm 31 to rotate relative to the base 1 to realize the lifting and lowering of the frame 21 as a whole, and the second push rod 33 drives the frame 21 to rotate relative to the swing arm 31 to realize the adjustment of the tilt angle of the frame 21.

[0037] The base 1 is installed and fixed in coordination with the vehicle, so that the present invention and the vehicle can be combined together, which facilitates the transportation and construction of the equipment.

[0038] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A diagonal bracing pile construction device for a foundation pit support structure, comprising a base and a pile delivery mechanism, wherein an inclination angle adjustment mechanism and a lifting mechanism are arranged between the pile delivery mechanism and the base, Features: The pile-feeding mechanism comprises a frame and two conveying modules arranged on the frame, the two conveying modules are arranged at intervals and form a gap for the diagonal support pile to be placed in, the conveying module comprises a chain belt, a steering gear cooperating with the chain belt for steering, and a driving gear for driving the chain belt to cyclically rotate, the chain belt is evenly provided with a plurality of movable limit pins at intervals along its circumference, the movable limit pin can be telescopically moved along its axial direction and plug-locked with the through groove of the diagonal support pile, the chain belt comprises a straight conveying section, the frame is provided with a guide module at the straight conveying section corresponding to the chain belt, the guide module is used to drive the movable limit pin to produce axial telescopic movement when it moves along the straight conveying section of the chain belt, thereby forming a locking of the diagonal support pile at the starting end of the straight conveying section of the chain belt, and forming an unlocking of the diagonal support pile at the end end of the straight conveying section of the chain belt; the chain belt is evenly provided with a plurality of support seats at intervals along its circumference, and the movable limit pin comprises a plurality of support seats cooperating with the support seats The wheelbase is shortened and the shifting mechanism is adapted to move the trainer to a position that the trainer can move relative to the wheelbase, wherein the trainer is provided with a second guide rail, the second guide rail being adapted to move relative to the wheelbase before the trainer can move.

2. The inclined support pile construction device of the foundation pit support structure according to claim 1, Features: The starting section of the guide groove is provided with two third guide inclined surfaces for vertically guiding the guide wheel to be inserted.

3. The inclined support pile construction device of the foundation pit support structure according to claim 1, Features: The pin head has a columnar front end and a conical rear end, and the front end of the pin head is provided with a guiding conical surface.

4. The inclined support pile construction device of the foundation pit support structure according to claim 1, Features: The frame comprises a slidable telescopic frame, on which at least two steering gears are arranged, and the straight transmission section of the chain belt is formed by linking one of the steering gears on the telescopic frame and the steering gear on the frame body.

5. The inclined support pile construction device of the foundation pit support structure according to claim 1, Features: The tilt angle adjustment mechanism and the lifting mechanism include a swing arm, a first push rod and a second push rod respectively rotatably connected to both sides of the swing direction of the swing arm; one end of the swing arm and the first push rod are rotatably connected to the base, the other end of the swing arm is rotatably connected to the frame, the other end of the first push rod is rotatably connected to the swing arm, and both ends of the second push rod are respectively rotatably connected to the frame and the swing arm.

6. The inclined support pile construction device of the foundation pit support structure according to claim 1, Features: The base is installed in coordination with the vehicle.

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