Deep foundation pit large concrete water stop structure under coastal geology

Abstract

The utility model discloses a deep foundation pit large concrete water stop structure under coastal geology, and belongs to the technical field, a mounting plate is fixedly connected to the outer side of a support pile, a plurality of groups of uniformly distributed mounting grooves are formed in the middle of the outer side wall of the mounting plate, bidirectional screws are rotatably connected in the mounting grooves, and the two ends of each bidirectional screw are in threaded connection with threaded blocks; the installation plate is additionally arranged between the supporting pile and the water retaining pile of the waterproof curtain, the twisting block is rotated to enable the two-way screw to rotate, and in the rotation process of the two-way screw, the threaded blocks on the left side and the right side get close to each other in the installation groove; and therefore, the water retaining piles on the two sides of the supporting pile are folded in the process that the arc-shaped clamping plates on the two sides get close to each other, and the connecting strength of the waterproof curtain connecting position can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of large concrete water-stopping structures for deep foundation pits in coastal geology, in particular to a large concrete water-stopping structure for deep foundation pits in coastal geology. Background Art

[0002] The foundation pit is an earth pit excavated at the foundation design position according to the base elevation and foundation plane dimensions. Before excavation, the excavation plan should be decided based on geological and hydrological data and the conditions of nearby buildings on site, and waterproofing and drainage work should be done well. If the excavation is not deep, the side slope can be used to make the earth slope stable, and the slope size is determined according to relevant construction regulations; if the excavation is deeper and there are buildings nearby, the foundation pit wall support method and shotcrete wall protection method can be used. Large foundation pits can even use underground continuous walls and column-type bored pile interlocking methods to prevent the outer soil layer from collapsing; if there is no impact on nearby buildings, the well point method can be used to lower the groundwater level and adopt slope open excavation; in cold areas, natural cold air freezing method can be used for excavation, etc.

[0003] At present, there are three types of water-stop curtains that are widely used in foundation pit projects: deep mixing cement water-stop curtain, high-pressure jet grouting cement-soil water-stop curtain and plain concrete underground continuous wall water-stop curtain. However, the current water-stop curtain pipe column connections are relatively weak, and are prone to cracking and water seepage in both directions. Utility Model Content

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to propose a large concrete water-stopping structure for deep foundation pits under coastal geology, which can improve the connection strength of the waterproof curtain connection.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a large concrete water-stopping structure for a deep foundation pit in coastal geology, comprising a foundation pit main body, a waterproof curtain is arranged on the outside of the foundation pit main body, and an anti-cracking mechanism is arranged on the outside of the waterproof curtain;

[0007] The waterproof curtain includes a plurality of support piles, both sides of which are fixedly connected with water retaining piles;

[0008] The anti-cracking mechanism includes a mounting plate, which is fixedly connected to the outside of the supporting pile. A plurality of evenly distributed mounting grooves are arranged in the middle of the outer wall of the mounting plate. A bidirectional screw is rotatably connected in the mounting groove. Both ends of the bidirectional screw are threadedly connected with threaded blocks. The threaded block slides in the mounting groove. An end of the threaded block away from the bidirectional screw is connected with an arc-shaped clamping plate. An end of the arc-shaped clamping plate away from the threaded block is located on a side of the water retaining pile away from the supporting pile.

[0009] The preferred technical solution of the utility model is that a torsion block is provided at the middle part of the outer circumference of the bidirectional screw.

[0010] An optimal technical solution of the utility model is that a crown beam is fixedly connected to the top of the waterproof curtain, and a plurality of groups of evenly distributed anchor rods are penetrated and fixedly connected inside the crown beam, and the anchor rods are respectively fixed to the crown beam and the soil outside the foundation pit.

[0011] An optimal technical solution of the utility model is that a baffle is fixedly connected to one side of the anchor rod close to the foundation pit body, and the baffle is fixedly connected to a side wall of the crown beam close to the foundation pit body.

[0012] The preferred technical solution of the utility model is that a plurality of groups of annularly distributed anchoring steel bars are passed through and fixedly connected to the inside of the anchor rod, and the anchor rods are all arranged obliquely.

[0013] The preferred technical solution of the utility model is that a plurality of groups of evenly distributed retaining piles are arranged on the outer side wall of the foundation pit body.

[0014] The beneficial effects of the utility model are:

[0015] 1. By adding a mounting plate between the supporting pile and the water retaining pile of the waterproof curtain, the twist block is rotated to rotate the bidirectional screw. During the rotation of the bidirectional screw, the left and right threaded blocks are brought closer to each other inside the mounting groove, so that the water retaining piles on both sides of the supporting pile are gathered together during the process of the arc-shaped clamping plates on both sides approaching each other, thereby improving the connection strength of the waterproof curtain connection.

[0016] 2. The waterproof curtain can be anchored to the external soil of the foundation pit through the cooperation of the crown beam, anchor rod, baffle and anchor steel bar, thereby improving the impact resistance of the waterproof curtain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a large concrete water-stop structure for a deep foundation pit under coastal geology.

[0018] Figure 2 It is a front view schematic diagram of a waterproof curtain structure of a large concrete water-stop structure of a deep foundation pit under coastal geology of the utility model;

[0019] Figure 3 It is a side view schematic diagram of a waterproof curtain structure of a large concrete water-stop structure of a deep foundation pit under coastal geology of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of a crack prevention mechanism of a large concrete water-stopping structure for a deep foundation pit in coastal geology;

[0021] In the figure:

[0022] 1. Foundation pit body; 2. Waterproof curtain; 3. Guard piles; 4. Anti-cracking mechanism; 5. Support piles; 6. Water retaining piles; 7. Crown beam; 8. Anchor rod; 9. Baffle; 10. Mounting plate; 11. Mounting groove; 12. Threaded block; 13. Bidirectional screw; 14. Twist block; 15. Arc splint; 16. Anchor steel bar. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0024] As shown in the figure, this embodiment provides a large concrete water-stopping structure for a deep foundation pit under coastal geology, including a foundation pit main body 1, a waterproof curtain 2 is provided on the outside of the foundation pit main body 1, and an anti-cracking mechanism 4 is provided on the outside of the waterproof curtain 2; the waterproof curtain 2 includes a plurality of supporting piles 5, and water retaining piles 6 are fixedly connected on both sides of the supporting piles 5; the anti-cracking mechanism 4 includes a mounting plate 10, the mounting plate 10 is fixedly connected to the outside of the supporting piles 5, and a plurality of evenly distributed mounting grooves 11 are provided in the middle of the outer wall of the mounting plate 10, and a double-walled structure 11 is rotatably connected in the mounting groove 11. The two ends of the bidirectional screw 13 are both threadedly connected with a thread block 12, and the thread block 12 slides in the installation groove 11. During the rotation of the bidirectional screw 13, the thread blocks 12 on both sides are driven to approach each other. The end of the thread block 12 away from the bidirectional screw is connected with an arc clamping plate 15, and the thread block 12 moves synchronously with the arc clamping plate 15. The end of the arc clamping plate 15 away from the thread block 12 is located on the side of the water retaining pile 6 away from the supporting pile 5. During the process of the two groups of thread blocks 12 approaching each other, the arc clamping plates 15 on both sides can be driven to approach each other. By adding a mounting plate 10 between the supporting pile 5 and the water retaining pile 6 of the waterproof curtain 2, the twisting block 14 is rotated to rotate the bidirectional screw 13, and during the rotation of the bidirectional screw 13, the left and right thread blocks 12 are brought close to each other inside the installation groove 11, so that the water retaining piles 6 on both sides of the supporting pile 5 are retracted during the process of the arc clamping plates 15 on both sides approaching each other, thereby improving the connection strength of the connection of the waterproof curtain 2.

[0025] A torsion block 14 is arranged in the middle of the outer circumference of the bidirectional screw rod. The torsion block 14 can drive the bidirectional screw rod 13 to rotate during its rotation.

[0026] The top of the waterproof curtain 2 is fixedly connected with a crown beam 7, and a plurality of groups of evenly distributed anchor rods 8 are passed through and fixedly connected inside the crown beam 7. The anchor rods 8 are respectively fixed to the crown beam 7 and the soil outside the foundation pit, so as to anchor the waterproof curtain 2.

[0027] The anchor rod 8 is fixedly connected to a baffle plate 9 on one side close to the foundation pit body 1 . The baffle plate 9 is fixedly connected to a side wall of the crown beam 7 close to the foundation pit body 1 . The baffle plate 9 can improve the connection strength between the anchor rod 8 and the crown beam 7 .

[0028] A plurality of groups of annularly distributed anchoring steel bars 16 are passed through and fixedly connected to the anchor rod 8 , and the anchor rod 8 is arranged obliquely.

[0029] The outer side wall of the foundation pit body 1 is provided with a plurality of groups of evenly distributed retaining piles 3 , which are supporting components of the foundation pit body 1 and can reduce the possibility of collapse of the foundation pit body 1 .

[0030] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A large concrete water-stopping structure for deep foundation pits in coastal geology, characterized by: It comprises a foundation pit body (1), a waterproof curtain (2) is provided on the outside of the foundation pit body (1), and an anti-cracking mechanism (4) is provided on the outside of the waterproof curtain (2); The waterproof curtain (2) comprises a plurality of support piles (5), and both sides of the support piles (5) are fixedly connected with water retaining piles (6); The anti-cracking mechanism (4) comprises a mounting plate (10), wherein the mounting plate (10) is fixedly connected to the outside of the supporting pile (5), and a plurality of evenly distributed mounting grooves (11) are arranged in the middle of the outer wall of the mounting plate (10), wherein a bidirectional screw (13) is rotatably connected in the mounting groove (11), and thread blocks (12) are threadedly connected at both ends of the bidirectional screw (13), and the thread blocks (12) slide in the mounting groove (11), and an arc-shaped clamping plate (15) is connected to one end of the thread block (12) away from the bidirectional screw, and an end of the arc-shaped clamping plate (15) away from the thread block (12) is located on a side of the water retaining pile (6) away from the supporting pile (5).

2. The large concrete water-stopping structure for deep foundation pits in coastal geology according to claim 1 is characterized by: A torsion block (14) is arranged in the middle of the outer circumference of the bidirectional screw.

3. The large concrete water-stopping structure for deep foundation pits in coastal geology according to claim 1 is characterized by: The top of the waterproof curtain (2) is fixedly connected to a crown beam (7), and a plurality of groups of evenly distributed anchor rods (8) are passed through and fixedly connected to the inside of the crown beam (7), and the anchor rods (8) are respectively fixed to the crown beam (7) and the soil outside the foundation pit.

4. The large concrete water-stopping structure for deep foundation pits in coastal geology according to claim 3 is characterized by: The anchor rods (8) are fixedly connected to a baffle plate (9) on one side close to the foundation pit body (1); the baffle plate (9) is fixedly connected to a side wall of the crown beam (7) close to the foundation pit body (1).

5. The large concrete water-stopping structure for deep foundation pits in coastal geology according to claim 4 is characterized by: A plurality of groups of annularly distributed anchoring steel bars (16) are passed through and fixedly connected to the interior of the anchor rod (8), and the anchor rod (8) is arranged at an angle.

6. The large concrete water-stopping structure for deep foundation pits in coastal geology according to claim 1 is characterized by: The outer side wall of the foundation pit body (1) is provided with a plurality of groups of evenly distributed retaining piles (3).

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