Soft soil foundation deep foundation pit supporting device

Abstract

The utility model discloses a soft soil foundation deep foundation pit supporting device which comprises a supporting plate, a supporting bottom plate and an inclined supporting rod, the supporting bottom plate is arranged at the bottom of a foundation pit, the supporting plate is perpendicular to the supporting bottom plate, and the top of the supporting plate is fixedly arranged along the side wall of the foundation pit through an anchoring structure. A plurality of sockets are arranged on the outer sides of the supporting plates and used for inserting and fixing two ends of the transverse supporting rods; the upper ends of the inclined supporting rods abut against the transverse supporting rods, and the bottom ends of the inclined supporting rods abut against the supporting bottom plate. According to the deep foundation pit supporting device, the supporting plate, the supporting bottom plate, the inclined supporting rods, the transverse supporting rods and the inserting bases are arranged, the deep foundation pit supporting device can be rapidly and conveniently installed and supported, meanwhile, the supporting stability of the supporting plate can be improved through cooperation of the transverse supporting rods and the inserting bases, and the inclined supporting rods are not only used for supporting the supporting plate but also used for supporting the supporting plate. And meanwhile, a certain supporting and fixing effect is provided for the transverse supporting rod.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to a deep foundation pit support device for a soft soil foundation. Background Art

[0002] The foundation support device for building buildings is a device used to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. It has the function of supporting, reinforcing and protecting the side walls of the foundation pit and the surrounding environment. Excavating foundations under soft soil, high groundwater level and other complex site conditions is prone to soil slippage, foundation pit instability, pile displacement, pit bottom uplift and other problems, posing a great threat to the safety of surrounding buildings, underground structures and pipelines. The main measure currently used is to erect protective plates next to the side walls of the foundation pit through piles, and then use the protective plates to block the soil to prevent it from sliding into the foundation pit.

[0003] After searching, the patent with application number CN202020713514.2 discloses a deep foundation pit support structure for soft soil foundation, including vertical holes, which are arranged at the edge of the inclined wall of the foundation pit, the number of vertical holes is set to multiple, and the multiple vertical holes are distributed in a linear array, and the multiple vertical holes are poured with concrete inside. There are bases, and the tops of the multiple bases are provided with support structures, and connecting pipes are provided between adjacent support structures. This structure is provided with multiple evenly distributed support structures on the side wall of the foundation pit, and the top rod is fixed by nails and pull ropes, and the bottom rod is supported by poured concrete and support rods. Compared with the common spray anchor support method, the protection effect is better.

[0004] However, when the existing foundation pit support structure is applied to soft soil, it mainly adopts rigid support. During construction, the soft soil foundation needs to be reinforced by bored cast-in-place piles and other methods. On this basis, reinforced concrete internal support is used in the foundation pit to support the foundation pit. This method has a long construction period and a complicated process, so it needs to be improved. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the present invention provides a deep foundation pit supporting device for a soft soil foundation.

[0006] The technical solution of the utility model is as follows:

[0007] A deep foundation pit support device for soft soil foundation comprises a support plate, a support bottom plate and an oblique support rod. The support bottom plate is arranged at the bottom of the foundation pit, the support plate is perpendicular to the support bottom plate and the top of the support plate is fixedly arranged along the side wall of the foundation pit by an anchoring structure, a plurality of sockets are arranged on the outer side of the support plate for plugging and fixing the two ends of the transverse support rod; the upper end of the oblique support rod abuts against the transverse support rod, and the bottom end of the oblique support rod abuts against the support bottom plate.

[0008] Preferably, a first pin is provided on the supporting plate and penetrates the supporting plate and is inserted into the foundation pit, a second pin is provided on the supporting bottom plate and the second pin penetrates the supporting bottom plate and is inserted into the foundation pit; the first pin is located above the transverse support rod.

[0009] Preferably, a drainage groove is provided in the first pin, and one end of the drainage groove is connected to the outer wall of the support plate; a plurality of water permeable openings are provided on the outer wall of the upper side of the first pin, and the plurality of water permeable openings are extended along the axial direction of the first pin, and each water permeable opening is connected to the drainage groove.

[0010] Preferably, the cross-section of the water permeable opening is arranged in a fan shape, and the center position of the fan shape overlaps with the axis of the first pin.

[0011] Preferably, a filter screen is provided inside the first pin, an inner support ring is provided inside the filter screen, and the inner support ring is fixedly connected via a connecting rod.

[0012] Preferably, water collecting buckets are symmetrically provided on both sides of the first plug pin, the opening ends of the water collecting buckets are arranged upward, and the lower ends of the water collecting buckets are connected to the water permeable openings on the first plug pin.

[0013] Preferably, the second pin includes a left pin and a right pin. The left pin obliquely penetrates the supporting bottom plate and is inserted into the foundation pit with the bottom end kept facing the supporting plate. The right pin remains perpendicular to the direction of the supporting bottom plate and then penetrates the supporting bottom plate and is inserted into the foundation pit.

[0014] Preferably, a water collecting trough is provided at the connection between the supporting plate and the supporting bottom plate, and the water collecting trough is located at the lower side of the water outlet of the drainage trough.

[0015] Preferably, the anchoring structure includes an anchor rope, an anchor and a connector, the connector is clamped to the connection between two adjacent supporting plates, the connector is connected to the anchor through the anchor rope, and the anchor is anchored in the soft soil of the foundation pit.

[0016] The utility model has the following beneficial effects:

[0017] The utility model realizes the fast and convenient installation and support of the deep foundation pit support device by arranging the support plate, the support bottom plate, the oblique support rod, the transverse support rod and the socket. At the same time, the cooperation between the transverse support rod and the socket can improve the support stability of the support plate. The oblique support rod is not only used to support the support plate, but also gives a certain supporting and fixing effect to the transverse support rod.

[0018] The utility model provides a first pin with a drainage groove inside, and cooperates with a water collecting bucket for collection. When it rains, rainwater penetrates downward and can collect rainwater in the soft soil foundation, thereby reducing the water content of the soft soil foundation and the risk of foundation pit collapse of the soft soil foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a cross-sectional schematic diagram of the overall device structure of the utility model;

[0020] Figure 2 It is a front view of the overall device structure of the utility model;

[0021] Figure 3 It is a cross-sectional schematic diagram of the first plug pin of the utility model.

[0022] The reference numerals in the figure are as follows:

[0023] 1. Support plate; 2. Support bottom plate; 3. Diagonal support rod; 4. Foundation pit; 5. Horizontal support rod; 6. Socket; 7. First pin; 8. Second pin; 81. Left pin; 82. Right pin; 9. Drain trough; 10. Filter screen; 11. Water permeable port; 12. Inner support ring; 13. Connecting rod; 14. Water collecting bucket; 15. Water collecting trough; 16. Anchor rope; 17. Anchor nail; 18. Connector. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figures 1 to 3 A deep foundation pit support device for soft soil foundation includes a support plate 1, a support bottom plate 2 and an oblique support rod 3. The support bottom plate 2 is arranged at the bottom of the foundation pit 4. The support plate 1 is perpendicular to the support bottom plate 2 and the top of the support plate 1 is fixed along the side wall of the foundation pit 4 through an anchoring structure. A plurality of sockets 6 are provided on the outside of the support plate 1 for plugging and fixing the two ends of the transverse support rod 5; the upper end of the oblique support rod 3 is abutted against the transverse support rod 5, and the bottom end of the oblique support rod 3 is abutted against the support bottom plate 2.

[0026] Furthermore, a first pin 7 is provided on the support plate 1 and penetrates the support plate 1 and is inserted into the foundation pit 4; a second pin 8 is provided on the support base plate 2 and penetrates the support base plate 2 and is inserted into the foundation pit 4; the first pin 7 is located above the transverse support rod 5.

[0027] Furthermore, a drainage groove 9 is provided in the first pin 7, and one end of the drainage groove 9 is connected to the outer wall of the support plate 1; a plurality of water-permeable openings 11 are provided on the outer wall of the upper side of the first pin 7, and the plurality of water-permeable openings 11 are extended along the axial direction of the first pin 7, and each water-permeable opening 11 is connected to the drainage groove 9.

[0028] Furthermore, the cross section of the water permeable opening 11 is arranged in a fan shape, and the center position of the fan shape overlaps with the axis of the first pin 7 .

[0029] Furthermore, a filter screen 10 is disposed inside the first plug pin 7 , an inner support ring 12 is disposed inside the filter screen 10 , and the inner support ring 12 is fixedly connected via a connecting rod 13 .

[0030] Furthermore, water collecting buckets 14 are symmetrically provided on both sides of the first plug pin 7 , the opening ends of the water collecting buckets 14 are arranged upward, and the lower ends of the water collecting buckets 14 are connected to the water permeable openings 11 on the first plug pin 7 .

[0031] Furthermore, the second pin 8 includes a left pin 81 and a right pin 82. The left pin 81 obliquely penetrates the supporting base plate 2 and is inserted into the foundation pit 4 with the bottom end kept facing the supporting plate 1. The right pin 82 remains perpendicular to the direction of the supporting base plate 2 and then penetrates the supporting base plate 2 and is inserted into the foundation pit 4.

[0032] Furthermore, a water collecting trough 15 is provided at the connection between the supporting plate 1 and the supporting bottom plate 2 , and the water collecting trough 15 is located at the lower side of the water outlet of the drainage trough 9 .

[0033] Furthermore, the anchoring structure includes an anchor rope 16 , an anchor 17 and a connector 18 . The connector 18 is clamped to the connection between two adjacent support plates 1 . The connector 18 is connected to the anchor 17 via the anchor rope 16 . The anchor 17 is anchored into the soft soil of the foundation pit 4 .

[0034] A method for using a deep foundation pit supporting device for a soft soil foundation comprises the following steps:

[0035] S1, laying the supporting bottom plate 2 at the bottom of the foundation pit 4, and then installing the supporting plate 1 on the side wall of the foundation pit 4 perpendicular to the supporting bottom plate 2;

[0036] S2, plug the transverse support rod 5 into the socket 6 provided on each supporting plate 1;

[0037] S3, the top end of the diagonal brace 3 is abutted against the lower side of the transverse brace 5, and the bottom end of the diagonal brace 3 is fixed on the supporting bottom plate 2;

[0038] S4. Insert the first pin 7 provided on the supporting plate 1 through the supporting plate 1 into the foundation pit 4, and at the same time, insert the second pin 8 provided on the supporting bottom plate 2 through the supporting bottom plate 2 into the foundation pit 4.

[0039] The working principle of this utility model:

[0040] In the present invention, the support bottom plate 2 is laid on the bottom of the foundation pit 4, and then the support plate 1 is installed on the side wall of the foundation pit 4 in a direction perpendicular to the support bottom plate 2, and a water collecting trough 15 is provided at the connection between the support plate 1 and the support bottom plate 2, and the water collecting trough 15 is located at the lower side of the water outlet of the drainage trough 9, the support plate 1 is perpendicular to the support bottom plate 2, and the top of the support plate 1 is fixedly arranged along the side wall of the foundation pit 4 by an anchoring structure, and the anchoring structure includes an anchor rope 16, an anchor nail 17 and a connector 18, and the connector 18 is clamped to the connection between two adjacent support plates 1, and the connector 18 is connected to the anchor nail 17 through the anchor rope 16, and the anchor nail 17 is anchored in the soft soil of the foundation pit 4;

[0041] A plurality of sockets 6 are provided on the outside of the support plate 1 for plugging and fixing the two ends of the transverse support rod 5; the upper end of the diagonal support rod 3 abuts against the transverse support rod 5, and the bottom end of the diagonal support rod 3 abuts against the supporting bottom plate 2; a drainage groove 9 is provided in the first pin 7, and one end of the drainage groove 9 is connected with the outer wall of the support plate 1; a plurality of water-permeable openings 11 are provided on the outer wall of the upper side surface of the first pin 7, and the plurality of water-permeable openings 11 are extended along the axial direction of the first pin 7, and each water-permeable opening 11 is connected with the drainage groove 9, and the cross-section of the water-permeable opening 11 is fan-shaped and the center position of the fan-shaped circle overlaps with the axis of the first pin 7.

[0042] A filter screen 10 is provided inside the first pin 7 , an inner support ring 12 is provided inside the filter screen 10 , and the inner support ring 12 is fixedly connected via a connecting rod 13 . Meanwhile, water collecting buckets 14 are symmetrically provided on both sides of the first pin 7 , the opening end of the water collecting bucket 14 is arranged upward, and the lower end of the water collecting bucket 14 is connected to the water permeable port 11 on the first pin 7 .

[0043] The second pin 8 includes a left pin 81 and a right pin 82. The left pin 81 obliquely penetrates the supporting base plate 2 and is inserted into the foundation pit 4 with the bottom end kept facing the supporting plate 1. The right pin 82 remains perpendicular to the direction of the supporting base plate 2 and then penetrates the supporting base plate 2 and is inserted into the foundation pit 4.

[0044] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A deep foundation pit support device for soft soil foundation, comprising a support plate (1), a support bottom plate (2) and a diagonal brace (3), characterized in that: The support base plate (2) is arranged at the bottom of the foundation pit (4); the support plate (1) is perpendicular to the support base plate (2) and the top of the support plate (1) is fixedly arranged along the side wall of the foundation pit (4) by means of an anchoring structure; a plurality of sockets (6) are arranged on the outside of the support plate (1) for plugging and fixing the two ends of the transverse support rod (5); the upper end of the diagonal support rod (3) is in contact with the transverse support rod (5), and the bottom end of the diagonal support rod (3) is in contact with the support base plate (2).

2. A soft soil foundation deep pit support device according to claim 1, characterized in that: The support plate (1) is provided with a first plug pin (7) which penetrates the support plate (1) and is inserted into the foundation pit (4); the support bottom plate (2) is provided with a second plug pin (8), and the second plug pin (8) penetrates the support bottom plate (2) and is inserted into the foundation pit (4); the first plug pin (7) is located above the transverse support rod (5).

3. A soft soil foundation deep pit support device according to claim 2, characterized in that: A drainage groove (9) is provided in the first plug pin (7), and one end of the drainage groove (9) is connected to the outer wall of the supporting plate (1); a plurality of water permeable openings (11) are provided on the outer wall of the upper side of the first plug pin (7), and the plurality of water permeable openings (11) are all extended along the axial direction of the first plug pin (7), and each water permeable opening (11) is connected to the drainage groove (9).

4. A soft soil foundation deep pit supporting device according to claim 3, characterized in that: The water permeable opening (11) has a fan-shaped cross section and the center of the fan-shaped circle overlaps with the axis of the first plug pin (7).

5. The deep foundation pit supporting device for soft soil foundation according to claim 3, characterized in that: A filter screen (10) is arranged inside the first plug pin (7), an inner support ring (12) is arranged inside the filter screen (10), and the inner support ring (12) is fixedly connected via a connecting rod (13).

6. The deep foundation pit supporting device for soft soil foundation according to claim 2, characterized in that: Water collecting buckets (14) are symmetrically arranged on both sides of the first plug pin (7), the opening end of the water collecting bucket (14) is arranged upward, and the lower end of the water collecting bucket (14) is connected to the water permeable port (11) on the first plug pin (7).

7. The deep foundation pit supporting device for soft soil foundation according to claim 2, characterized in that: The second plug pin (8) comprises a left plug pin (81) and a right plug pin (82); the left plug pin (81) obliquely penetrates the supporting bottom plate (2) and is then inserted into the foundation pit (4) with the bottom end thereof facing the supporting plate (1); the right plug pin (82) is maintained perpendicular to the direction of the supporting bottom plate (2) and then penetrates the supporting bottom plate (2) and is inserted into the foundation pit (4).

8. The deep foundation pit supporting device for soft soil foundation according to claim 1, characterized in that: A water collecting trough (15) is provided at the connection between the supporting plate (1) and the supporting bottom plate (2), and the water collecting trough (15) is located at the lower side of the water outlet of the drainage trough (9).

9. The deep foundation pit supporting device for soft soil foundation according to claim 1, characterized in that: The anchoring structure comprises an anchor rope (16), an anchor nail (17) and a connecting head (18); the connecting head (18) is clamped to the connection between two adjacent supporting plates (1); the connecting head (18) is connected to the anchor nail (17) via the anchor rope (16); and the anchor nail (17) is anchored in the soft soil of the foundation pit (4).

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