A combined emergency support structure for deep foundation pit support

Abstract

The present invention discloses a combined emergency support structure for deep foundation pit support, comprising: a guard plate, which is arranged on the inner side of the foundation pit for bearing the foundation pit pressure, and a cross bar is fixed on the guard plate; a base, which is anchored in the foundation pit ground and formed with a guide groove perpendicular to the guard plate; a support seat, which is slidably arranged on the guide groove; a diagonal brace, the bottom end of which is hinged on the support seat, the top end of which abuts the guard plate and the top end of which abuts the bottom of the cross bar; a locking mechanism, which is arranged on the support seat and is used to fix the support seat on the base. The support posture of the diagonal brace can be flexibly and quickly adjusted, and the diagonal brace can change its tilt angle to adapt to guard plates of different sizes. In addition, the diagonal brace itself can maintain an integrated structure. Compared with a telescopic structure, the structural strength of the diagonal brace itself is guaranteed, and the diagonal brace is prevented from being easily broken.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit support, and in particular to a combined emergency support structure for deep foundation pit support. Background Art

[0002] A deep foundation pit refers to a project with an excavation depth exceeding 5 meters (including 5 meters), or a project with a depth of less than 5 meters but with particularly complex geological conditions, surrounding environment and underground pipelines. In order to ensure the safety of underground structure construction and the surrounding environment of the foundation pit, support, reinforcement and protection measures will be adopted for the side walls of the deep foundation pit and the surrounding environment. For example, a deep foundation pit with publication number CN210529711U has a preset inclined support structure in the pit before excavation, including an upper inclined member and a lower inclined member, and the upper inclined member and the lower inclined member are connected in a detachable manner to form an integrated inclined support; before the excavation of the foundation pit, the inclined support structure is inserted obliquely into the soil in the foundation pit at an angle of 10° to 80° along the horizontal and vertical directions of the foundation pit according to the set horizontal and vertical spacing; after the excavation of the foundation pit, the upper end of the upper inclined member is connected to the foundation pit retaining structure through a purlin, and the lower end of the lower inclined member is anchored in the soil below the basement structure floor. This existing support structure is used for deep foundation pits with an excavation depth of less than 20m. Since the upper inclined components of the inclined support structure can effectively transfer the load to the soil below the bottom of the pit, it can effectively reduce the anchoring depth of the vertical foundation pit retaining structure compared with the conventional foundation pit support structure; however, the bottom support position of the inclined support in the existing support structure cannot be adjusted, making it difficult to adapt to foundation pit support plates of different sizes; in addition, the strength of its support structure needs to be improved. Summary of the Invention

[0003] In view of this, the present invention proposes a combined emergency support structure for deep foundation pit support, which can solve one of the above problems to at least a certain extent.

[0004] The technical solution of the present invention is achieved as follows:

[0005] A combined emergency support structure for deep foundation pit support, comprising:

[0006] A guard plate is provided inside the foundation pit to bear the pressure of the foundation pit, and a cross bar is fixed on the guard plate;

[0007] A base, the base being anchored in the foundation pit ground, and having a guide groove perpendicular to the guard plate formed on the base;

[0008] a support seat, the support seat being slidably disposed on the guide groove;

[0009] An oblique support rod, wherein the bottom end of the oblique support rod is hinged on the support seat, the top end of the oblique support rod abuts against the guard plate and the top end of the oblique support rod abuts against the bottom of the cross bar;

[0010] A locking mechanism is provided on the support seat and is used to fix the support seat on the base.

[0011] As a further optional solution for the combined emergency support structure for deep foundation pit support, the locking mechanism includes a lower locking mechanism, which includes a first rack arranged in the guide groove and a second rack that can be raised and lowered below the support seat, and the engagement of the first rack and the second rack is achieved by driving the second rack down.

[0012] As a further optional solution for the combined emergency support structure for deep foundation pit support, a rotatable screw and a guide rod arranged parallel to the screw are vertically provided on the top of the second rack, the support seat includes a support plate, and support side plates extend downward from both sides of the support plate. The second rack is located between the two support side plates, and the support plate is provided with a threaded hole for threaded connection with the screw and a guide hole for sliding sleeve connection with the guide rod.

[0013] As a further optional solution of the combined emergency support structure for deep foundation pit support, the locking mechanism further includes an upper locking mechanism;

[0014] The upper locking mechanism includes a snap-fit member disposed between the two supporting side plates, the snap-fit member including a hinged rod and a clamping rod disposed in parallel, a connecting plate disposed between the hinged rod and the clamping rod, and a toggle plate extending radially from the hinged rod;

[0015] The two ends of the hinge rod are rotatably arranged on the two supporting side plates, and the two supporting side plates are provided with guide arc grooves, and the two ends of the clamping rod pass through the guide arc grooves respectively;

[0016] Limiting plates are formed on both sides of the guide groove of the base, and strip holes are provided along the length direction of the two limiting plates. The upper edges of the strip holes are recessed with multiple bayonet holes; the two ends of the clamping rod are inserted into the strip holes;

[0017] A pressure plate is provided on the guide rod, and the pressure plate is located above the toggle plate; when the pressure plate presses the toggle plate from top to bottom, the clamping rod rotates around the hinge rod to rise, so that the clamping rod is clamped into the clamping port; when the pressure plate and the toggle plate are in a separated state, the clamping rod is disengaged from the clamping port under the action of gravity.

[0018] As a further optional solution for the combined emergency support structure for deep foundation pit support, the support plate of the support seat is provided with a support vertical plate perpendicular to it, and two spaced-apart mounting plates are provided between the support plate and the support vertical plate, and the bottom end of the diagonal support rod is hinged between the two mounting plates through a horizontally arranged axle pin.

[0019] As a further optional solution for the combined emergency support structure for deep foundation pit support, the bottom surface of the guide groove of the base is a guide plate, and the guide plate is recessed with a mounting groove arranged along its length direction, and the first rack is fixedly arranged in the mounting groove; the bottom of the two supporting side plates of the support seat is provided with a supporting slide plate, and the support guard plate slides against the guide plate.

[0020] As a further optional solution for the combined emergency support structure for deep foundation pit support, an anchor plate is provided on the base, and a plurality of anchor holes are provided on the anchor plate.

[0021] As a further optional solution for the combined emergency support structure for deep foundation pit support, the guard plate is bent multiple times to form grooves and bosses extending vertically and distributed in a staggered manner.

[0022] As a further optional solution for the combined emergency support structure for deep foundation pit support, a plurality of cross bars are provided on the guard plate, and the plurality of cross bars are arranged at intervals in the vertical direction.

[0023] As a further optional solution for the combined emergency support structure for deep foundation pit support, multiple bases, diagonal braces and locking mechanisms are correspondingly arranged on one base, and different diagonal braces are respectively abutted against the bottoms of different cross bars.

[0024] The beneficial effects of the present invention are as follows: by anchoring a base with a guide groove on the ground of the foundation pit, the bottom end of the diagonal support rod is adjusted to the optimal fixed position in the guide groove of the base through the support seat, and finally locked and fixed by a locking mechanism; in this way, the supporting posture of the diagonal support rod can be adjusted flexibly and quickly, and the diagonal support rod can be conveniently changed in its inclination angle to adapt to guard plates of different sizes; in addition, under the above-mentioned adjustment structure, the diagonal support rod itself can maintain an integrated structure, and compared with the telescopic structure, the structural strength of the diagonal support rod itself is guaranteed, avoiding the diagonal support rod from being easily broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic structural diagram of a combined emergency support structure for deep foundation pit support according to one embodiment;

[0027] Figure 2A schematic diagram of the structure in which the support seat is arranged on the base;

[0028] Figure 3 An exploded schematic diagram of the support seat, base, and locking mechanism;

[0029] Figure 4 A cross-sectional schematic diagram of the support seat being arranged on the base;

[0030] Figure 5 A schematic diagram of the support base being locked on the base;

[0031] Figure 6 A schematic diagram of the support base being slidably arranged on the base;

[0032] Figure 7 This is a schematic structural diagram of a combined emergency support structure for deep foundation pit support according to another embodiment.

[0033] In the figure: 1, guard plate; 11, boss; 12, groove;

[0034] 2. horizontal bar;

[0035] 3. Base; 31. Guide groove; 32. First rack; 33. Guide plate; 34. Limit plate; 341. Strip hole; 342. Bayonet; 35. Anchor plate; 351. Anchor hole;

[0036] 4. Support seat; 41. Support plate; 411. Threaded hole; 412. Guide hole; 42. Support side plate; 421. Guide arc groove; 43. Support vertical plate; 44. Mounting plate; 45. Axis pin; 46. Support slide plate;

[0037] 5. Diagonal bracing rods;

[0038] 6. Locking mechanism; 61. Second rack; 611. Screw; 612. Guide rod; 613. Pressing plate; 62. Snap member; 621. Articulated rod; 622. Clamping rod; 623. Connecting plate; 624. Toggle plate. DETAILED DESCRIPTION

[0039] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. 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.

[0040] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] refer to Figure 1-6 , shows a combined emergency support structure for deep foundation pit support, including a guard plate 1, a base 3, a support base 4, a diagonal brace 5 and a locking mechanism 6;

[0043] The guard plate 1 is arranged on the inner side of the foundation pit to bear the foundation pit pressure. A cross bar 2 is fixed on the guard plate 1. The cross bar 2 can greatly improve the structural strength of the guard plate 1 and enhance the guard plate 1's bearing capacity for the foundation pit pressure. There are multiple cross bars 2 on the guard plate 1, and the multiple cross bars 2 are arranged at intervals in the vertical direction. In addition, preferably, the guard plate 1 is bent multiple times to form grooves 12 and bosses 11 that extend vertically and are staggered. In this way, the bending resistance of the guard plate 1 is further enhanced, ensuring that the guard plate 1 can stably bear the foundation pit pressure.

[0044] On this basis, the guard plate 1 is supported by a diagonal support rod 5, and the diagonal support rod 5 is tilted, with one end abutting on the guard plate 1 and the bottom of the cross bar 2, and the other end transmitting the foundation pit pressure to the foundation pit ground; wherein, the bottom end of the diagonal support rod 5 is hinged on the support seat 4, and the support seat 4 is slidably set on the guide groove 31; therefore, the position of the diagonal support rod 5 can be easily adjusted, so that the diagonal support rod 5 with a fixed size can adapt to guard plates 1 of different sizes within a wide range; when the bottom end of the diagonal support rod 5 is adjusted to a suitable position, the locking mechanism 6 can be used to fix the support seat 4 on the base 3.

[0045] The locking mechanism 6 is provided on the support base 4, so that the base 3 can be used as an independent module unit, the support base 4 and the locking mechanism 6 can be used as independent module units, and the diagonal support rod 5 can be used as an independent module unit. The three module units can be quickly combined. For example, in one embodiment, Figure 7 As shown, a plurality of support bases 4, diagonal braces 5, and locking mechanisms 6 are correspondingly arranged on a base 3, with different diagonal braces 5 respectively abutting the bottoms of different crossbars 2. In this way, stable vertical support for the guard plate 1 is achieved; multiple diagonal braces 5 can be quickly adjusted and positioned on a single base 3, resulting in high construction efficiency and strong structural stability.

[0046] refer to Figure 2-4 , the locking mechanism 6 includes a lower locking mechanism (not marked in the figure), and the lower locking mechanism includes a first rack 32 arranged in the guide groove 31 and a second rack 61 that can be raised and lowered below the support seat 4. The first rack 32 and the second rack 61 are engaged by driving the second rack 61 downward. In this way, the position of the support seat 4 in the guide groove 31 is fixed; and for the convenience of operation, a rotatable screw 611 and a guide rod 612 arranged parallel to the screw 611 are vertically provided on the top of the second rack 61. The support seat 4 includes a support plate 41, and support side plates 42 extend downward from both sides of the support plate 41. The second rack 61 is located between the two support side plates 42. The support plate 41 is provided with a threaded hole 411 for threaded connection with the screw 611 and a guide hole 412 for slidingly sleeved with the guide rod 612. In this way, with reference to Figure 4 When the height of the second rack 61 needs to be adjusted, it is only necessary to rotate the screw 611 to achieve the engagement of the second rack 61 with the first rack 32 or the separation of the second rack 61 from the first rack 32.

[0047] In order to further improve the stability of the support base 4 locked on the base 3, the locking mechanism 6 also includes an upper locking mechanism (not marked in the figure); specifically, Figure 3As shown, the upper locking mechanism includes a snap member 62 arranged between the two supporting side plates 42, the snap member 62 includes a hinge rod 621 and a clamping rod 622 arranged in parallel, a connecting plate 623 is provided between the hinge rod 621 and the clamping rod 622, and a toggle plate 624 extends radially from the hinge rod 621; the two ends of the hinge rod 621 are rotatably arranged on the two supporting side plates 42, and the two supporting side plates 42 are provided with a guide arc groove 421, and the two ends of the clamping rod 622 pass through the two supporting side plates 42. The guide arc groove 421; limit plates 34 are formed on both sides of the guide groove 31 of the base 3, and the two limit plates 34 are provided with strip holes 341 arranged along the length direction thereof, and the upper edge of the strip hole 341 is recessed with a plurality of snap-fits 342. In this embodiment, these snap-fits are arranged equidistantly along the length direction of the strip hole 341; the two ends of the clamping rod 622 are passed through the strip hole 341; a pressure plate 613 is provided on the guide rod 612, and the pressure plate 613 is located above the toggle plate 624.

[0048] Specifically, if Figure 6 As shown, the support seat 4 is slidably arranged on the base 3, and in this state, the position of the bottom end of the diagonal support rod 5 can be adjusted; wherein, the second rack 61 and the first rack 32 are in a separated state, and the pressure plate 613 above the second rack 61 does not contact the toggle plate 624 of the snap member 62, and the total weight of the clamping rod 622 and the connecting plate 623 is greater than the weight of the toggle plate 624, so that the clamping rod 622 is located in the bar hole 341 under the action of gravity; in this way, the first rack 32 does not limit the second rack 61, and the bayonet 342 does not limit the clamping rod 622, and the support seat 4 can slide freely along the guide groove 31.

[0049] For example Figure 5 FIG. 4 shows a state in which the support seat 4 is locked on the base 3; wherein, when the position of the support column is adjusted to a suitable position, the screw rod 611 is rotated to make the second rack 61 descend, so that the first rack 32 and the second rack 61 are engaged, so that the first rack 32 limits the second rack 61 and prevents the second rack 61 from moving in the horizontal direction; at the same time, the guide rod 612 descends, and the pressure block on the guide rod 612 squeezes the wave plate, so that the clamping rod 622 rotates around the hinge rod 621 (in Figure 5 In the embodiment of the present invention, the latch rod 622 is lifted upwards, so that the latch rod 622 is locked into the latch hole 342, so that the latch hole 342 limits the position of the latch rod 622. In this way, the upper locking mechanism and the lower locking mechanism can be locked by simply rotating the screw rod 611, which is simple to operate and has a stable structure.

[0050] In one embodiment, if Figure 3 As shown, the support base 4 has a support plate 41 provided on it, with a vertical support plate 43 perpendicular thereto. Two spaced-apart mounting plates 44 are provided between the support plate 41 and the vertical support plates 43. The bottom end of the diagonal brace 5 is hinged between the two mounting plates 44 via a horizontally arranged axle pin 45. In this way, the support base 4 provides stable support for the diagonal brace 5. Even if the axle pin 45 accidentally breaks, the bottom end of the diagonal brace 5 will be trapped between the support plate 41, the vertical support plate 43, and the two mounting plates 44.

[0051] In one embodiment, in order to facilitate the stable sliding of the support seat 4 in the guide groove 31, Figure 3 and Figure 4 The bottom surface of the guide groove 31 of the base 3 is a guide plate 33, and the guide plate 33 is recessed with a mounting groove arranged along its length direction, and the first rack 32 is fixedly arranged in the mounting groove; the bottom of the two supporting side plates 42 of the support seat 4 is provided with a supporting slide plate 46, and the support guard plate 1 slides against the guide plate 33.

[0052] In one embodiment, in order to facilitate the anchoring of the base 3, reference is made to Figure 3 The base 3 is provided with an anchor plate 35, and the anchor plate 35 is provided with a plurality of anchor holes 351. Anchors or other components can be used to pass through the anchor holes 351 to achieve anchoring of the base 3.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A combined emergency support structure for deep foundation pit support, characterized in that: include: A guard plate is provided inside the foundation pit to bear the pressure of the foundation pit, and a cross bar is fixed on the guard plate; A base, the base being anchored in the foundation pit ground, and having a guide groove perpendicular to the guard plate formed on the base; a support seat, the support seat being slidably disposed on the guide groove; An oblique support rod, wherein the bottom end of the oblique support rod is hinged on the support seat, the top end of the oblique support rod abuts against the guard plate and the top end of the oblique support rod abuts against the bottom of the cross bar; A locking mechanism, the locking mechanism being provided on the support seat and being used to secure the support seat on the base; The locking mechanism includes a lower locking mechanism, which includes a first rack arranged in the guide groove and a second rack arranged below the support seat in a liftable manner, and the first rack and the second rack are engaged by driving the second rack downward; A rotatable screw and a guide rod arranged parallel to the screw are vertically provided on the top of the second rack, the support seat includes a support plate, and support side plates extend downward from both sides of the support plate. The second rack is located between the two support side plates, and the support plate is provided with a threaded hole for threaded connection with the screw and a guide hole for sliding sleeve connection with the guide rod; The locking mechanism also includes an upper locking mechanism; The upper locking mechanism includes a snap-fit member disposed between the two supporting side plates, the snap-fit member including a hinged rod and a clamping rod disposed in parallel, a connecting plate disposed between the hinged rod and the clamping rod, and a toggle plate extending radially from the hinged rod; The two ends of the hinge rod are rotatably arranged on the two supporting side plates, and the two supporting side plates are provided with guide arc grooves, and the two ends of the clamping rod pass through the guide arc grooves respectively; Limiting plates are formed on both sides of the guide groove of the base, and strip holes are provided along the length direction of the two limiting plates. The upper edges of the strip holes are recessed with multiple bayonet holes; the two ends of the clamping rod are inserted into the strip holes; A pressure plate is provided on the guide rod, and the pressure plate is located above the toggle plate; when the pressure plate presses the toggle plate from top to bottom, the clamping rod rotates around the hinge rod to rise, so that the clamping rod is clamped into the clamping port; when the pressure plate and the toggle plate are in a separated state, the clamping rod is disengaged from the clamping port under the action of gravity.

2. The combined emergency support structure for deep foundation pit support according to claim 1, characterized in that: The support plate of the support seat is provided with a support vertical plate perpendicular to it, and two spaced mounting plates are provided between the support plate and the support vertical plate. The bottom end of the diagonal support rod is hinged between the two mounting plates through a horizontally arranged shaft pin.

3. The combined emergency support structure for deep foundation pit support according to claim 2, characterized in that: The bottom surface of the guide groove of the base is a guide plate, and the guide plate is recessed with a mounting groove arranged along its length direction, and the first rack is fixedly arranged in the mounting groove; the bottom of the two supporting side plates of the support seat is provided with a supporting slide plate, and the supporting slide plate slides against the guide plate.

4. The combined emergency support structure for deep foundation pit support according to claim 3, characterized in that: An anchor plate is provided on the base, and a plurality of anchor holes are provided on the anchor plate.

5. The combined emergency support structure for deep foundation pit support according to claim 1, characterized in that: The guard plate is bent multiple times to form grooves and bosses that extend vertically and are distributed in a staggered manner.

6. A combined emergency support structure for deep foundation pit support according to any one of claims 1 to 5, characterized in that: There are multiple cross bars on the guard plate, and the multiple cross bars are arranged at intervals in the vertical direction.

7. The combined emergency support structure for deep foundation pit support according to claim 6, characterized in that: A plurality of bases, diagonal support rods and locking mechanisms are correspondingly arranged on one base, and different diagonal support rods are respectively abutted against the bottoms of different cross bars.

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