Deep foundation pit support structure and construction method in complex urban environment

Abstract

The present invention belongs to the field of building construction technology, and discloses a deep foundation pit support structure and construction method in a complex urban environment, including a foundation pit. The present invention sets a trigger component and a warning component to cooperate with each other. When a slight collapse occurs near the upper end of the inner wall of the foundation pit, the bearing plate and the support plate will no longer be at a right angle of 90 degrees. The support plate drives the telescopic end of the telescopic plate away from the bearing plate, and the limit plate is pulled at the same time. The trigger rod presses the locking plate itself down through the groove on the locking plate and is no longer in a clamping state with the positioning plate. The tension spring pulls the positioning plate to squeeze the air flow inside the bellows, and two whistles are blown to warn the surrounding staff. The guide rod is inclined, which allows the positioning plate to move while also erecting a warning plate through the support of the guide rod, thereby further helping the staff to determine the location of the collapse and effectively preventing the foundation pit from continuing to collapse.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction, and in particular relates to a deep foundation pit support structure and a construction method under a complex urban environment. Background Art

[0002] A building foundation pit is a pit excavated at the designed location of the foundation according to the base elevation and foundation plane dimensions. Eventually, the pit will be backfilled with sand, fly ash, or foam concrete to strengthen the foundation. However, due to the presence of many pipes in the soil layer in the city, the soil layer around the foundation pit is relatively loose. Therefore, before backfilling, the foundation pit needs to be supported to ensure that the foundation pit will not collapse during backfilling or when workers are working in the foundation pit.

[0003] In the existing technical solutions, the inner wall of the foundation pit is generally reinforced by pile support, soil nail wall support or anchor support. However, without exception, most support methods do not indicate a technical solution for warning of landslides. As a result, once a slight landslide occurs on the inner wall of the foundation pit, the ground workers cannot discover it in the first time and carry out remedial work. For this reason, we provide deep foundation pit support structure and construction method for complex urban environments. Summary of the Invention

[0004] In order to solve the problems raised in the above-mentioned background technology, the present invention provides a deep foundation pit support structure and construction method in a complex urban environment, which solves the problem that most of the existing support methods do not provide a technical solution for warning of landslides. Once a slight landslide occurs on the inner wall of the foundation pit, the staff on the ground cannot discover it in the first time.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a deep foundation pit support structure in a complex urban environment, comprising a foundation pit and a plurality of support structures placed on top of the foundation pit;

[0006] The support structure includes a bearing plate placed on the top of the foundation pit, a support plate 1 is hingedly connected to the side of the bearing plate, a support plate 2 is slidably connected to the side of the support plate, and two positioning pins are symmetrically inserted through the top of the bearing plate;

[0007] The deep foundation pit support structure under the complex urban environment further includes a trigger component, a warning component 1 and a warning component 2;

[0008] The trigger assembly includes a telescopic plate fixed to one side of the support plate, the telescopic end of the telescopic plate is hinged to a limit plate that slides horizontally on the top of the carrier plate, the top of the carrier plate is vertically slid with a locking plate, the middle of the locking plate is provided with a groove, and the limit plate is provided with a trigger rod located in the groove;

[0009] The warning assembly includes a warning plate hinged to the top of the supporting plate, a positioning plate slidably mounted on the bottom of the warning plate, the positioning plate being connected to the warning plate via a bellows, a support rod fixedly mounted inside the warning plate, the support rod movably passing through the positioning plate and the bellows, a tension spring wound around the outer circumference of the support rod being mounted inside the bellows, the side of the positioning plate being hinged to the top of the supporting plate via a guide rod, and the outer circumference of the bellows being connected to two symmetrically arranged whistles;

[0010] The positioning plate and the locking plate are in a clamping connection;

[0011] The warning component 2 includes a base hinged to the bottom of the support plate 1, and the top of the base is also penetrated by two positioning pins, each of which is inserted into the foundation pit.

[0012] Preferably, a slot for placing a whistle is provided on the top of the warning plate, and the sound outlet of the whistle faces upward.

[0013] Preferably, the trigger assembly also includes a spring sheet 1, which is supported on the bottom of the locking plate. The two sides of the groove on the top of the locking plate are inclined. A limiting groove is respectively provided at both ends of the top of the locking plate. The limiting groove is semicircular and the inner diameter value is adapted to the outer diameter value of the trigger rod.

[0014] Preferably, the spring sheet always supports the locking plate to rise to a fixed posture, and the contact surfaces of the locking plate and the positioning plate are both frosted.

[0015] Preferably, the warning component 2 also includes a plastic rod symmetrically hinged to the top of the base, and two guide grooves are respectively provided at both ends of the side surfaces of the second support plate, and the ends of each plastic rod slide inside the guide groove respectively, and an alarm is respectively provided at both ends of the side surfaces of the second support plate.

[0016] Preferably, the alarm device includes several baffles hinged to the side of one support plate, the top and bottom of each baffle are hinged together by a metal rod, each metal rod is elastically connected to the side of the second support plate through a second spring sheet, and a rectangular groove for placing the baffle is provided on the second support plate, and the rectangular groove is painted with a color different from that of the baffle and the first support plate.

[0017] Preferably, the guide slot consists of a vertical slot and an inclined slot, and the second warning component further includes a spring telescopic rod located between the vertical slot and the inclined slot.

[0018] The construction method of deep foundation pit support structure in complex urban environment, the specific steps are as follows:

[0019] (1) When a slight collapse occurs near the upper end of the inner wall of the foundation pit, the angle between the bearing plate and the support plate 1 will gradually become an acute angle. The support plate 1 drives the telescopic end of the telescopic plate away from the bearing plate, and the limit plate is pulled. The trigger rod presses the locking plate itself down through the groove on the locking plate, so that the locking plate is not in a clamping relationship with the positioning plate. The tension spring pulls the positioning plate to squeeze the air flow inside the bellows and blows two whistles. The guide rod is tilted, which makes the positioning plate move while also raising the warning plate through the support of the guide rod;

[0020] (2) When the upper end of the inner wall of the foundation pit collapses, the angle between the base and the second support plate will be acute, and the end of the plastic rod will be squeezed and slide in the guide groove, and the baffle close to the side of the plastic rod will be folded. After being guided by the metal rod, each baffle will be folded, and the color in the rectangular groove will be displayed.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention cooperates with a trigger component and a warning component in structure. When a slight collapse occurs near the upper end of the inner wall of the foundation pit, the bearing plate and the support plate will no longer be at a right angle of ninety degrees. The support plate drives the telescopic end of the telescopic plate away from the bearing plate, and the limit plate is pulled at the same time. The trigger rod presses the locking plate itself down through the groove on the locking plate and is no longer in a clamping connection with the positioning plate. The tension spring pulls the positioning plate to squeeze the air flow inside the bellows, and two whistles are blown to alert the surrounding staff. The guide rod is inclined, which makes the positioning plate move while also erecting the warning plate through the support of the guide rod, thereby further helping the staff to determine the location of the collapse and effectively preventing the foundation pit from continuing to collapse.

[0023] The present invention cooperates with the second structure of the foundation pit and the warning component. When the upper end of the inner wall of the foundation pit collapses, the angle between the base and the second supporting plate will be acute. Furthermore, the end of the plastic rod will be squeezed and slide in the guide groove, and will gradually contact and fold the baffle close to the side of the plastic rod. At this time, the color display in the rectangular groove can effectively warn the workers in the foundation pit to quickly alert the workers on the ground. At the same time, they can also obtain enough time for self-rescue.

[0024] The present invention cooperates with the structures of the foundation pit and the warning component II, slides the spring telescopic rod, moves the plastic rod into the vertical groove, directly folds the base to fit closely to the support plate II, and at the same time folds the load-bearing plate to fit closely to the side of the support plate I. At this time, the limit plate and the trigger rod will be separated from the locking plate and the warning component I, and the warning component I will be triggered at this time. However, directly folding the warning plate can return all the structures of the warning component I to their original positions, and the positioning plate will be engaged with the locking plate again, making the device easy to operate and the folded device also easy to carry and store. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the appearance structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the appearance structure of the support structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the structural decomposition of the support plate 1 and the support plate 2 of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure coordination between the trigger component and the warning component of the present invention;

[0029] Figure 5 This is a schematic diagram of the internal structure of the warning plate of the present invention;

[0030] Figure 6 This is a front cross-sectional view of the structure of the trigger component and the warning component of the present invention;

[0031] Figure 7 A schematic diagram of the positions of the whistle and the warning plate of the present invention;

[0032] Figure 8 This is a schematic cross-sectional view of the internal structure of the warning plate of the present invention;

[0033] Figure 9 This is a schematic diagram of the structure coordination between the second support plate and the second warning component of the present invention;

[0034] Figure 10 This is a schematic diagram of the exploded structure of the support plate 2 and the warning component 2 of the present invention.

[0035] In the figure: 1. Foundation pit; 2. Support structure; 21. Support plate 1; 22. Support plate 2; 23. Load-bearing plate; 24. Positioning pin; 3. Trigger assembly; 31. Telescopic plate; 32. Limit plate; 33. Trigger rod; 34. Locking plate; 35. Limit groove; 36. Spring sheet 1; 4. Warning assembly 1; 41. Warning plate; 42. Bellows; 43. Positioning plate; 44. Support rod; 45. Tension spring; 46. Guide rod; 47. Whistle; 5. Warning assembly 2; 51. Base; 52. Plastic rod; 53. Guide groove; 54. Spring telescopic rod; 55. Warning device; 551. Baffle; 552. Metal rod; 553. Spring sheet 2. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] like Figures 1 to 10 As shown, the present invention provides a deep foundation pit support structure in a complex urban environment, comprising a foundation pit 1 and a plurality of support structures 2 placed on the top of the foundation pit 1;

[0038] The support structure 2 includes a bearing plate 23 placed on the top of the foundation pit 1. The side of the bearing plate 23 is hinged with a support plate 1 21. The side of the support plate 1 21 is slidably connected to the support plate 2 22. Two positioning pins 24 are symmetrically inserted through the top of the bearing plate 23.

[0039] The deep foundation pit support structure in a complex urban environment also includes a trigger component 3, a warning component 1 4 and a warning component 2 5;

[0040] The trigger assembly 3 includes a telescopic plate 31 fixed to the side of the support plate 21. The telescopic end of the telescopic plate 31 is hinged to a limit plate 32 that slides horizontally on the top of the carrier plate 23. A locking plate 34 slides vertically on the top of the carrier plate 23. The locking plate 34 has a groove in the middle. The limit plate 32 is provided with a trigger rod 33 located in the groove.

[0041] Warning assembly 1 4 includes a warning plate 41 hinged to the top of the carrier plate 23. A positioning plate 43 is slidably mounted on the bottom of the warning plate 41. The positioning plate 43 is connected to the warning plate 41 via a bellows 42. A support rod 44 is fixedly mounted inside the warning plate 41. The support rod 44 movably passes through the positioning plate 43 and the bellows 42. A tension spring 45 is mounted inside the bellows 42 and is wound around the outer circumference of the support rod 44. The side of the positioning plate 43 is hinged to the top of the carrier plate 23 via a guide rod 46. The outer circumference of the bellows 42 is connected to two symmetrically arranged whistles 47.

[0042] The positioning plate 43 and the locking plate 34 are in a snap-fitting shape;

[0043] The second warning component 5 includes a base 51 hinged to the bottom of the support plate 21 , and two positioning pins 24 are also passed through the top of the base 51 , and each positioning pin 24 is inserted into the foundation pit 1 .

[0044] The above solution is adopted: when a slight collapse occurs near the upper end of the inner wall of the foundation pit 1, the bearing plate 23 and the supporting plate 1 21 will no longer be at a right angle of 90 degrees, but will gradually become an acute angle. At this time, the supporting plate 1 21 drives the telescopic end of the telescopic plate 31 away from the bearing plate 23, and the limit plate 32 is pulled at the same time. The trigger rod 33 presses the locking plate 34 itself down through the groove on the locking plate 34, thereby preventing the locking plate 34 from being in a clamping relationship with the positioning plate 43. The tension spring 45 pulls the positioning plate 43 to squeeze the air flow inside the bellows 42, and blows two whistles 47 to further warn the surrounding staff. At the same time, it can also effectively prevent the foundation pit 1 from continuing to collapse.

[0045] It should also be noted that the guide rod 46 is inclined, which allows the positioning plate 43 to move while the warning plate 41 is erected through the support of the guide rod 46, thereby further helping the staff to determine the location of the landslide.

[0046] like Figure 7 and Figure 8 As shown, a slot for placing a whistle 47 is provided on the top of the warning plate 41, and the sound outlet of the whistle 47 faces upward.

[0047] With the above solution, the position and material design of the whistle 47 allow the sound it emits to be better transmitted to a distance, and the notch on the warning plate 41 can reduce the probability of the device being damaged by materials on the construction site during use.

[0048] like Figures 1-6 As shown, the trigger assembly 3 also includes a spring sheet 36, which is supported on the bottom of the locking plate 34. The two sides of the groove at the top of the locking plate 34 are inclined, and a limiting groove 35 is respectively provided at both ends of the top of the locking plate 34. The limiting groove 35 is semicircular and the inner diameter value is adapted to the outer diameter value of the trigger rod 33.

[0049] The spring piece 1 36 always supports the locking plate 34 to rise to a fixed position, and the contact surfaces of the locking plate 34 and the positioning plate 43 are both frosted.

[0050] With the above solution, when the upper end of the inner wall of the foundation pit 1 collapses, the angle between the bearing plate 23 and the supporting plate 1 21 changes from a right angle to an acute angle, and the supporting plate 1 21 drives the limiting plate 32 and the trigger rod 33 away from the bearing plate 23 through the telescopic end of the telescopic plate 31, while the inclined surface of the groove at the top of the locking plate 34 can help the trigger rod 33 to slide better and press the locking plate 34 to descend;

[0051] When the lower end of the inner wall of the foundation pit 1 collapses, the angle between the bearing plate 23 and the supporting plate 1 21 changes from a right angle to an obtuse angle, and the supporting plate 1 21 drives the limiting plate 32 and the trigger rod 33 to approach the bearing plate 23 through the telescopic end of the telescopic plate 31. Furthermore, the trigger rod 33 can still press the locking plate 34 to disengage the positioning plate 43 through the inclined surface on the groove. The trigger rod 33 is finally located in the limiting groove 35, and the warning component 1 4 can also be triggered well. Furthermore, no matter where the collapse position of the foundation pit 1 is, the device can issue a warning to the surrounding staff, thereby improving the warning effect of the device;

[0052] like Figure 1 、 Figure 2 、 Figure 9 and Figure 10 As shown, the warning component 2 5 also includes a plastic rod 52 symmetrically hinged to the top of the base 51, and two guide grooves 53 are respectively provided at both ends of the side of the support plate 2 2. The end of each plastic rod 52 slides inside the guide groove 53, and a warning device 55 is respectively provided at both ends of the side of the support plate 2 22.

[0053] The warning device 55 includes a plurality of baffles 551 hinged to the side of the support plate 21. The top and bottom of each baffle 551 are hinged together through a metal rod 552. Each metal rod 552 is elastically connected to the side of the support plate 22 through a spring sheet 2 553. A rectangular groove for placing the baffle 551 is provided on the support plate 22. The rectangular groove is painted with a color different from that of the baffle 551 and the support plate 21.

[0054] Using the above solution: Figure 2 The structural coordination between the supporting structure 2 and the base 51 can be clearly observed. When the lower end of the inner wall of the foundation pit 1 collapses, the workers in the foundation pit 1 can clearly feel it. However, when the upper end of the inner wall of the foundation pit 1 collapses slightly, since the upper end is far away from the workers in the foundation pit 1, their perception of the collapse becomes weaker. When the upper end collapses, the angle between the base 51 and the supporting plate 22 will be acute. Furthermore, the end of the plastic rod 52 will be squeezed and slide in the guide groove 53, and at the same time will gradually contact and fold over the baffle 551 close to the side of the plastic rod 52. Guided by the metal rod 552, each baffle 551 will fold over. At this time, the color display in the rectangular groove can effectively warn the workers in the foundation pit 1 to quickly and simultaneously with the workers on the ground, and at the same time, they can also obtain enough time for self-rescue.

[0055] like Figures 1-10 As shown, the guide slot 53 is composed of a vertical slot and an inclined slot, and the second warning component 5 further includes a spring telescopic rod 54 located between the vertical slot and the inclined slot.

[0056] With the above solution, when the plastic rod 52 slides in the inclined slot, it can serve as a warning. However, the sliding spring telescopic rod 54 moves the plastic rod 52 into the vertical slot, directly folding the base 51 to fit closely against the second support plate 22, and at the same time folding the bearing plate 23 to fit closely against the side of the first support plate 21. At this time, the limit plate 32 and the trigger rod 33 will be separated from the locking plate 34 and the warning component 1 4.

[0057] However, it should be noted that the warning component 14 will be triggered at this time, but directly folding the warning plate 41 can return all the structures of the warning component 14 to their original positions, and the positioning plate 43 will be engaged with the locking plate 34 again, making the device easy to operate and the folded device also easy to carry and store.

[0058] The construction method of deep foundation pit support structure in complex urban environment, the specific steps are as follows:

[0059] (1) When a slight collapse occurs near the upper end of the inner wall of the foundation pit 1, the angle between the bearing plate 23 and the support plate 21 will gradually become an acute angle. The support plate 21 drives the telescopic end of the telescopic plate 31 away from the bearing plate 23, and the limit plate 32 is pulled. The trigger rod 33 presses the locking plate 34 itself down through the groove on the locking plate 34, so that the locking plate 34 is not in a clamping relationship with the positioning plate 43. The tension spring 45 pulls the positioning plate 43 to squeeze the air flow inside the bellows 42 and blows two whistles 47. The guide rod 46 is inclined, which makes the warning plate 41 stand up while the positioning plate 43 moves.

[0060] (2) When the upper end of the inner wall of the foundation pit 1 collapses, the angle between the base 51 and the supporting plate 22 will be acute, and the end of the plastic rod 52 will be squeezed and slid in the guide groove 53, and the baffle 551 close to the side of the plastic rod 52 will be folded. After being guided by the metal rod 552, each baffle 551 will be folded, and the color in the rectangular groove will be displayed.

[0061] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0062] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A deep foundation pit support structure in a complex urban environment, comprising a foundation pit (1), characterized in that: It also includes a plurality of support structures (2) placed on top of the foundation pit (1); The support structure (2) includes a bearing plate (23) placed on the top of the foundation pit (1), the side of the bearing plate (23) is hinged with a supporting plate 1 (21), the side of the supporting plate 1 (21) is slidably connected with a supporting plate 2 (22), and two positioning pins (24) are symmetrically inserted through the top of the bearing plate (23); The deep foundation pit support structure under a complex urban environment further includes a trigger component (3), a warning component 1 (4) and a warning component 2 (5); The trigger assembly (3) comprises a telescopic plate (31) fixed to a side surface of a supporting plate (21), a telescopic end of the telescopic plate (31) being hinged to a limit plate (32) sliding horizontally on the top of the bearing plate (23), a locking plate (34) sliding vertically on the top of the bearing plate (23), a groove being provided in the middle of the locking plate (34), and a trigger rod (33) located in the groove being provided on the limit plate (32); The warning component (4) includes a warning plate (41) hinged to the top of the carrier plate (23), a positioning plate (43) is slidably installed on the bottom of the warning plate (41), the positioning plate (43) is connected to the warning plate (41) through a bellows (42), a support rod (44) is fixed inside the warning plate (41), the support rod (44) movably passes through the positioning plate (43) and the bellows (42), a tension spring (45) wound around the outer periphery of the support rod (44) is installed inside the bellows (42), the side of the positioning plate (43) is hinged to the top of the carrier plate (23) through a guide rod (46), and the outer periphery of the bellows (42) is respectively connected to two symmetrically arranged whistles (47); The positioning plate (43) and the locking plate (34) are in a snap-fitting configuration; The warning component 2 (5) includes a base (51) hinged to the bottom of the support plate 1 (21), and the top of the base (51) is also penetrated by two positioning pins (24), and each positioning pin (24) is inserted into the foundation pit (1); The warning component 2 (5) further comprises a plastic rod (52) symmetrically hinged to the top of the base (51), two guide grooves (53) are respectively provided at both ends of the side surface of the support plate 2 (22), and the ends of each plastic rod (52) slide in the inside of the guide groove (53), and a warning device (55) is respectively provided at both ends of the side surface of the support plate 2 (22); The warning device (55) includes a plurality of baffles (551) hinged to the side of the support plate (21), the top and bottom of each baffle (551) are hinged together by a metal rod (552), each metal rod (552) is elastically connected to the side of the support plate (22) through a spring sheet (553), and a rectangular groove for placing the baffle (551) is provided on the support plate (22), and the rectangular groove is painted with a color different from that of the baffle (551) and the support plate (21); The guide slot (53) is composed of a vertical slot and an inclined slot, and the second warning component (5) further comprises a spring telescopic rod (54) located between the vertical slot and the inclined slot.

2. The deep foundation pit support structure in a complex urban environment according to claim 1 is characterized by: The top of the warning plate (41) is provided with a notch for placing a whistle (47), with the sound outlet of the whistle (47) facing upwards.

3. The deep foundation pit support structure for complex urban environments according to claim 2 is characterized by: The trigger assembly (3) further comprises a spring sheet (36), the spring sheet (36) being supported on the bottom of the locking plate (34), the two sides of the groove at the top of the locking plate (34) being inclined, and a limiting groove (35) being respectively formed at both ends of the top of the locking plate (34), the limiting groove (35) being semicircular and having an inner diameter that matches the outer diameter of the trigger rod (33).

4. The deep foundation pit support structure for complex urban environments according to claim 3 is characterized by: The spring sheet 1 (36) always supports the locking plate (34) to rise to a fixed posture, and the contact surfaces of the locking plate (34) and the positioning plate (43) are both frosted.

5. A construction method for a deep foundation pit support structure under a complex urban environment, which is applied to the deep foundation pit support structure under a complex urban environment as claimed in claim 4, characterized in that: The specific steps are as follows: (1) When a slight collapse occurs near the upper end of the inner wall of the foundation pit (1), the angle between the bearing plate (23) and the supporting plate (21) will gradually become an acute angle, and the supporting plate (21) drives the telescopic end of the telescopic plate (31) away from the bearing plate (23), the limit plate (32) is pulled, and the trigger rod (33) presses the locking plate (34) itself down through the groove on the locking plate (34), so that the locking plate (34) is not in a clamping relationship with the positioning plate (43), and the tension spring (45) pulls the positioning plate (43) to squeeze the air flow inside the bellows (42) and blow two whistles (47). The guide rod (46) is inclined, so that when the positioning plate (43) moves, the warning plate (41) is also erected through the support of the guide rod (46); (2) When the upper end of the inner wall of the foundation pit (1) collapses, the angle between the base (51) and the second support plate (22) will be acute, and the end of the plastic rod (52) will be squeezed and slid in the guide groove (53), and the baffle (551) close to the side of the plastic rod (52) will be folded. After being guided by the metal rod (552), each baffle (551) will be folded, and the color in the rectangular groove will be displayed.

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