A batter pile foundation pit support system and a connection structure node of a surrounding purlin

Abstract

The utility model provides a kind of inclined pile foundation pit supporting system and the connection structure node construction of surrounding purlin, it is related to the technical field of foundation pit support, including inclined pile, ring beam, anchoring steel bar, reinforcing angle steel a and reinforcing angle steel b, the pile head of inclined pile is embedded in ring beam, one end of anchoring steel bar is welded and fixed on the steel bar inside inclined pile, the other end of anchoring steel bar is welded and fixed on the steel bar inside ring beam, reinforcing angle steel a and inclined pile and ring beam are all welded and fixed;On the basis of the connection of anchoring steel bar, increase fixed angle steel a and reinforcing angle steel b, wherein, anchoring steel bar one end is welded in the steel bar inside inclined pile, the other end is welded in the steel bar inside ring beam, can stably transfer lateral load that inclined pile bears, reinforcing angle steel a and reinforcing angle steel b are all welded and fixed with inclined pile, ring beam, can further disperse concentrated stress at node, avoid local structure damage, while strengthen constraint from multiple directions, effectively limit the relative displacement of inclined pile and ring beam.

Description

Technical Field

[0001] This utility model relates to the technical field of foundation pit support, and in particular to a structural node construction for the connection between an inclined pile foundation pit support system and a waler. Background Technology

[0002] With the rapid development of urbanization, more and more high-rise residential buildings are being constructed. The foundation pits of these high-rise residential buildings are deep and large in area, and the surrounding environment is becoming increasingly complex. In particular, reducing the impact of foundation pit excavation on the displacement of existing buildings, including the displacement of surrounding roads, is a key concern. Therefore, the industry has put forward new requirements for foundation pit support systems. An inclined pile foundation pit support system can reduce the use of internal bracing, increase the effective construction area in the foundation pit, and also ensure the safety and stability of the support structure.

[0003] Currently, the inclined pile foundation pit support system and the waler connection structure use embedded anchored steel bars and concrete pouring to form a whole between the inclined pile head and the waler ring beam. This method requires removing the concrete from the inclined pile head and welding the anchored steel bars to the inclined pile steel bars. The inclined pile and the ring beam are only connected by the anchored steel bars, resulting in low vertical load constraint. If the waler ring beam settles, the inclined pile will not provide any constraint on its structure. Therefore, it is necessary to provide a new construction method for the connection between the inclined pile foundation pit support system and the waler connection structure to solve the above technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a structural node for the connection between the inclined pile foundation pit support system and the waler.

[0005] This utility model provides a structural node for the connection between an inclined pile foundation pit support system and a waler, including an inclined pile, a ring beam, anchoring steel bars, reinforcing angle steel a, and reinforcing angle steel b. The pile head of the inclined pile is embedded in the ring beam. One end of the anchoring steel bar is welded and fixed to the steel bars inside the inclined pile, and the other end of the anchoring steel bar is welded and fixed to the steel bars inside the ring beam. The reinforcing angle steel a is welded and fixed to both the inclined pile and the ring beam.

[0006] Preferably, the reinforcing angle steel a is disposed at the acute angle surface formed by the inclined pile and the bottom of the ring beam. The acute angle surface is a contact surface with an angle of less than 90° formed by the side of the inclined pile and the bottom surface of the ring beam. Two reinforcing angle steels b are provided, and both reinforcing angle steels b are welded and fixed to the inclined pile and the ring beam. The two reinforcing angle steels b are respectively disposed at the two right angle surfaces formed by the inclined pile and the bottom of the ring beam. The right angle surfaces are contact surfaces with an angle of 90° formed by the two sides of the inclined pile and the bottom surface of the ring beam.

[0007] Preferably, the reinforcing angle steel a is provided with an included angle. The included angle of the reinforcing angle steel a The angle is 25°-35°.

[0008] Preferably, the reinforcing angle steel b is provided with an included angle. The included angle of the reinforcing angle steel b It is 90°.

[0009] Preferably, both the reinforcing angle steel a and the reinforcing angle steel b are made of Q235 grade steel.

[0010] Preferably, the length of the reinforcing angle steel a is 240-260mm, more preferably 250mm, and the thickness of the reinforcing angle steel a is 7-9mm.

[0011] Preferably, the length of the reinforcing angle steel b is 240-260mm, more preferably 250mm, and the thickness of the reinforcing angle steel b is 7-9mm.

[0012] Compared with related technologies, the inclined pile foundation pit support system and waler connection structure node provided by this utility model have the following beneficial effects: 1. Based on the connection of anchoring steel bars, reinforced angle steel a and reinforced angle steel b are added. One end of the anchoring steel bar is welded to the internal steel bar of the inclined pile, and the other end is welded to the internal steel bar of the ring beam. This can stably transfer the lateral load borne by the inclined pile. Both reinforced angle steel a and reinforced angle steel b are welded and fixed to the inclined pile and the ring beam, which can further disperse the concentrated stress at the joint, avoid local structural damage, and strengthen the constraint from multiple directions. This effectively limits the relative displacement between the inclined pile and the ring beam, solves the problem of the traditional connection relying solely on anchoring steel bars and the single constraint direction, improves the integrity of the joint between the ring beam and the inclined pile, and can improve the stability of the support.

[0013] 2. By placing reinforcing angle steel a at the acute angle formed by the inclined pile and the bottom of the ring beam, and having two reinforcing angle steel b at the two right angles formed by the inclined pile and the bottom of the ring beam respectively, a stable triangular support structure can be formed, providing strong vertical support force, directly restraining the downward trend of the ring beam, and significantly reducing the safety risk of foundation pit support caused by ring beam displacement. At the same time, Q235 grade steel is used, and the high strength ensures that the stiffness of reinforcing angle steel a and reinforcing angle steel b themselves meets the support requirements. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of the inclined pile foundation pit support system and the waler connection structure node provided by this utility model; Figure 2 This is a schematic diagram of the structure of the reinforcing angle steel at point a in this utility model; Figure 3 This is a schematic diagram of the structure of the reinforcing angle steel at point b in this utility model.

[0015] The following are the labels in the diagram: 1. Inclined pile; 2. Ring beam; 3. Anchor reinforcement; 4. Reinforcing angle steel a; 5. Reinforcing angle steel b. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Example Please refer to the following: Figures 1 to 3 A structural node for connecting a sloping pile foundation pit support system and a waler includes a sloping pile 1, a ring beam 2, anchoring steel bars 3, reinforcing angle steel a4, and reinforcing angle steel b5. The sloping pile 1 has a square cross-section, and the pile head of the sloping pile 1 is embedded in the ring beam 2. The concrete at the pile head of the sloping pile 1 has been removed. One end of the anchoring steel bar 3 is welded and fixed to the steel bars inside the sloping pile 1, and the other end of the anchoring steel bar 3 is welded and fixed to the steel bars inside the ring beam 2. The reinforcing angle steel a4 is welded and fixed to both the sloping pile 1 and the ring beam 2.

[0018] In the above process, by embedding the pile head of the inclined pile 1 into the ring beam 2 and removing the concrete from the pile head, and then welding the anchoring steel bar 3, a foundation force transmission channel is established between the inclined pile 1 and the ring beam 2. The anchoring steel bar 3 can stably transfer the lateral load borne by the inclined pile 1 to the ring beam 2, avoiding the load concentration in the local node. At the same time, the reinforcement angle steel a4 is welded to both, which can further enhance the rigidity of the node connection, reduce the relative deformation between the inclined pile 1 and the ring beam 2, and improve the overall stability of the structure.

[0019] Furthermore, the reinforcing angle steel a4 is set at the acute angle surface formed by the bottom of the inclined pile 1 and the ring beam 2. The acute angle surface is the contact surface where the angle between the side of the inclined pile and the bottom surface of the ring beam is less than 90°. There are two reinforcing angle steels b5. Both reinforcing angle steels b5 are welded and fixed to the inclined pile 1 and the ring beam 2. The two reinforcing angle steels b5 are respectively set at the two right angle surfaces formed by the bottom of the inclined pile 1 and the ring beam 2. The right angle surfaces are the contact surfaces where the angle between the two sides of the inclined pile 1 and the bottom surface of the ring beam 2 is equal to 90°.

[0020] In the above, the reinforcing angle steel a4 is placed on the acute angle surface, which can specifically strengthen the support strength of the acute angle area at the bottom of the inclined pile 1 and the ring beam 2. This area is prone to stress concentration due to the small included angle. The reinforcing angle steel a4 can effectively disperse the stress. The two reinforcing angle steels b5 are located on the right angle side, which can limit the connection between the inclined pile 1 and the ring beam 2 from both sides, further restricting the relative displacement of the two in the horizontal and vertical directions, forming multi-directional reinforcement and protection, and improving the deformation resistance of the joint.

[0021] Furthermore, the reinforcing angle steel a4 is equipped with an included angle. Reinforce the included angle of angle steel a4 The angle is 25°-35°, and the included angle of the reinforced angle steel a4 is... 30° is preferred.

[0022] In the above, the included angle of the reinforcing angle steel a4 is set between 25° and 35°, preferably 30°. This angle range can better match the angle of the bottom acute angle surface of the inclined pile 1 and the ring beam 2, ensuring that the reinforcing angle steel a4 is closely fitted with the inclined pile 1 and the ring beam 2, maximizing the contact area to transfer force, avoiding uneven force on the reinforcing angle steel a4 or gaps due to angle mismatch, thereby more efficiently playing its role in supporting and dispersing stress, and ensuring the stability of the node structure.

[0023] Furthermore, the reinforcing angle steel b5 is equipped with an included angle. Reinforce the included angle of angle steel B5 It is 90°.

[0024] In the above, the included angle of the reinforcing angle steel b5 is set to 90°, which perfectly matches the angle of the right-angled side of the bottom of the inclined pile 1 and the ring beam 2. This allows the two right-angled sides of the reinforcing angle steel b5 to be tightly welded to the inclined pile 1 and the ring beam 2 respectively, forming a stable right-angled support structure. This structure can efficiently bear and transmit the horizontal and vertical forces at the right-angled side, effectively resist the deformation of the node in this direction, and further improve the overall load-bearing capacity of the node.

[0025] Furthermore, both reinforced angle steel a4 and reinforced angle steel b5 are made of Q235 grade steel.

[0026] In the above, the reinforcing angle steel a4 and reinforcing angle steel b5 are made of Q235 grade steel. Q235 grade steel has high yield strength and tensile strength, which can meet the requirements of the mechanical properties of steel for joint reinforcement. When bearing the load generated during the foundation pit support process, it is not easy to bend, break or other damage, ensuring that the reinforcing angle steel a4 and reinforcing angle steel b5 can play a long-term stable reinforcement role and provide reliable support strength for the connection node between inclined pile 1 and ring beam 2.

[0027] Furthermore, the length of the reinforcing angle steel a4 is 240-260mm, preferably 250mm, and the thickness of the reinforcing angle steel a4 is 7-9mm, preferably 8mm. The length of the reinforcing angle steel b5 is 240-260mm, preferably 250mm, and the thickness of the reinforcing angle steel b5 is 7-9mm, preferably 8mm.

[0028] In the above, the length and thickness of the reinforcing angle steel a4 and the reinforcing angle steel b5 are consistent to ensure that the two reinforcing angle steels b5 and a4 are matched in terms of mechanical properties and connection effect, thereby improving the load-bearing capacity and stability of the node.

[0029] The working principle of the inclined pile foundation pit support system and waler connection structure node provided by this utility model is as follows: First, the concrete at the head of the inclined pile 1 embedded in the ring beam 2 is removed. One end of the anchoring steel bar 3 is welded to the internal steel bar of the inclined pile 1, and the other end is anchored into the internal steel bar of the ring beam 2 of the waler, thus realizing the foundation force transmission connection between the inclined pile 1 and the ring beam 2. This allows the lateral load borne by the inclined pile 1 to be transferred to the ring beam 2. Then, the prefabricated reinforcing angle steel a4 is welded to the acute angle surface at the bottom of the inclined pile 1 and the ring beam 2. Two reinforcing angle steels b5 are welded to the two right-angled sides at the bottom of the inclined pile 1 and the ring beam 2, respectively. Both reinforcing angle steels a4 and b5 pass through their bottoms. The platform provides rigid support to the three sides of the inclined pile 1 to enhance the vertical bearing capacity, constrain the settlement of the ring beam 2 and limit the relative displacement between the inclined pile 1 and the ring beam 2. Finally, concrete is poured into the ring beam 2 to wrap the connection between the pile head of the inclined pile 1, the anchor steel bar 3, the reinforcing angle steel a4 and the reinforcing angle steel b5, so that the components form a structural whole, further strengthening the integrity and stability of the node, and ultimately improving the vertical bearing capacity of the inclined pile foundation pit support system and the waler connection structure, reducing the risk of settlement of the foundation pit outer protective structure and improving the safety level of the foundation pit.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A structural node connecting a inclined pile foundation pit support system and a waler, characterized in that, The structure includes inclined piles (1), ring beams (2), anchoring steel bars (3), reinforcing angle steel a (4), and reinforcing angle steel b (5). The pile head of the inclined piles (1) is embedded in the ring beams (2). One end of the anchoring steel bars (3) is welded and fixed to the steel bars inside the inclined piles (1), and the other end of the anchoring steel bars (3) is welded and fixed to the steel bars inside the ring beams (2). The reinforcing angle steel a (4) is welded and fixed to both the inclined piles (1) and the ring beams (2).

2. The structural node construction of the inclined pile foundation pit support system and the waler connection structure according to claim 1, characterized in that, The reinforcing angle steel a (4) is set at the acute angle surface formed by the bottom of the inclined pile (1) and the ring beam (2). There are two reinforcing angle steels b (5). Both reinforcing angle steels b (5) are welded and fixed to the inclined pile (1) and the ring beam (2). The two reinforcing angle steels b (5) are respectively set at the two right angle surfaces formed by the bottom of the inclined pile (1) and the ring beam (2).

3. The structural node construction of the inclined pile foundation pit support system and the waler connection structure according to claim 1, characterized in that, The reinforcing angle steel a (4) is provided with an included angle. The included angle of the reinforcing angle steel a (4) The angle is 25°-35°.

4. The structural node construction of the inclined pile foundation pit support system and the waler connection structure according to claim 1, characterized in that, The reinforcing angle steel b (5) is provided with an included angle. The included angle of the reinforcing angle steel b (5) It is 90°.

5. The structural node construction for the connection between the inclined pile foundation pit support system and the waler as described in claim 1, characterized in that, Both the reinforcing angle steel a (4) and the reinforcing angle steel b (5) are made of Q235 grade steel.

6. The connection structure node between the inclined pile foundation pit support system and the waler as described in claim 1, characterized in that, The length of the reinforcing angle steel a (4) is 240-260mm, and the thickness of the reinforcing angle steel a (4) is 7-9mm.

7. The structural node construction for the connection between the inclined pile foundation pit support system and the waler as described in claim 1, characterized in that, The length of the reinforcing angle steel b (5) is 240-260mm, and the thickness of the reinforcing angle steel b (5) is 7-9mm.

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