Double-pile diagonal bracing type foundation pit side wall reinforcing and supporting structure

Abstract

A double-pile diagonal bracing type foundation pit side wall reinforcing and supporting structure comprises cement piles which are arranged on the side portion of a foundation pit in the length direction or the width direction of the foundation pit at equal intervals, steel columns are vertically inserted into the cement piles, the size of the steel columns is smaller than that of the cement piles, and cement bases are arranged in a foundation at the upper ends of the cement piles. The upper ends of the cement piles are fixedly connected into a whole through the cement base, ground anchors are embedded in the inner side of the cement base, steel plates are arranged between the outer ends of the anchor tops, inclined supporting rods are fixedly connected to the steel plates, and the lower ends of the inclined supporting rods are supported on the bottom face of a foundation pit. The two rows of cement piles are arranged, a certain interval is formed between the two rows of cement piles, the adjacent cement piles in each row are of a staggered structure, pressure of soil on the outer side of a foundation pit can be resisted step by step, the concrete retaining wall and the timber piles on the outer sides of the cement piles are combined, and the stable and reliable retaining wall structure is formed. And the foundation pit support task in the soft soil area can be well handled.

Description

Technical Field

[0001] The utility model relates to the field of building construction, in particular to a double-pile oblique support type foundation pit side wall reinforcement support structure. 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. In order to ensure the safety of underground structure construction and the surrounding environment of the foundation pit and avoid collapse of the foundation pit during construction, it is usually necessary to set up foundation pit retaining walls. The foundation pit retaining walls are support, reinforcement and protection measures for the side walls of the foundation pit and the surrounding environment. The foundation pit retaining walls will be subject to soil pressure from both sides of the foundation pit.

[0003] In the related art, the foundation pit is generally protected by setting cement piles around the foundation pit to form a gravity retaining wall, which resists the pressure of the soil outside the foundation pit through the surrounding retaining walls, and a square frame bracket is set between the gravity retaining walls for reinforcement and support on the inside. This retaining structure is effective in areas with good soil, but not so effective in areas with soft soil. The gravity retaining wall is prone to deformation and collapse. In addition, the inner wall of this retaining wall is usually a concave and convex curved structure. The process of abutting the internal support with the inner wall of the retaining wall is troublesome, and the stability of the abutment is poor, which needs to be improved. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a double-pile oblique support type foundation pit side wall reinforcement support structure.

[0005] The technical solution of the utility model is: a double-pile oblique support type foundation pit side wall reinforcement support structure, including cement piles arranged at equal intervals along the length direction or width direction of the foundation pit side part, steel columns are vertically inserted into the cement piles, the upper ends of the steel columns extend upwardly out of the ground, the size of the steel columns is smaller than the size of the cement piles, a square cement seat is arranged in the foundation at the upper end of the cement pile, the cement seat fixes and connects the upper ends of each cement pile as a whole, anchor nails are pre-buried on the inner side of the cement seat, a plurality of anchor nails are arranged side by side, a steel plate is arranged between the outer ends of the plurality of anchor tops, an oblique support rod is fixedly connected to the steel plate, and the lower end of the oblique support rod is supported on the bottom surface of the foundation pit.

[0006] Preferably, the cement piles are arranged in a staggered manner and are interconnected to form a whole.

[0007] Preferably, the cement piles are arranged in two rows, and a certain distance is provided between the two rows of cement piles.

[0008] Preferably, a plurality of top pressure plates are provided at equal intervals between adjacent cement seats, and the top pressure plates are supported between the upper ends of the cement seats.

[0009] Preferably, a concrete retaining wall is provided between the outer sides of the cement piles. The concrete retaining wall is set to a corresponding height according to the construction conditions, and the lower end of the concrete retaining wall is connected to the cement seat as a whole.

[0010] Preferably, a row of wooden piles is inserted into the foundation outside the concrete retaining wall, with certain gaps between the wooden piles and the same spacing between the wooden piles.

[0011] Preferably, a support platform with a trapezoidal cross section is provided in the foundation pit inside the cement pile, the outer side surface of the support platform is in contact with the cement pile, and a boss is provided on the inner bottom surface of the support platform.

[0012] Preferably, cement support piles are provided in the foundation pit, a square steel frame is inserted into the cement support piles, the upper end of the square steel frame extends out of the bottom surface of the foundation pit, and the lower end of the diagonal support rod is fixedly connected to the upper end of the square steel frame.

[0013] Preferably, the steel column and the diagonal brace are both I-beams, and a lifting hole is provided at the upper end of the steel column.

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

[0015] (1) The utility model is provided with two rows of cement piles with a certain interval between the two rows of cement piles. The cement piles in each row are staggered to gradually resist the pressure of the soil outside the foundation pit. Combined with the concrete retaining wall and wooden piles outside the cement piles, a stable and reliable retaining wall structure is formed, which can well cope with the task of foundation pit protection in areas with soft soil.

[0016] (2) A cement seat is arranged between the upper ends of the cement piles of the utility model, and a top plate is arranged between the two cement seats to provide a lateral connection support between the two, which can further improve the structural strength between the cement piles. In addition, the planar structure on the outer side of the cement seat is conducive to the rapid and stable docking of the anchor and the support, thereby improving the stability of the internal support. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 yes Figure 1 AA section view of the structure.

[0019] In the figure, 12. cement piles, 121. steel columns, 13. cement seats, 14. anchor nails, 141. steel plates, 15. diagonal braces, 16. top plates, 17. concrete retaining walls, 18. wooden piles, 19. support platforms, 20. cement support piles, and 201. square steel frames. DETAILED DESCRIPTION

[0020] Example 1, see the attached specification Figure 1-2A double-pile diagonal bracing type foundation pit side wall reinforcement support structure includes cement piles 12 arranged at equal intervals along the length direction or width direction of the foundation pit side, and a steel column 121 is vertically inserted into the cement pile 12. The steel column 121 is an I-beam, which can be combined with the cement column as a whole to improve the strength of the cement pile 12. The size of the steel column 121 is smaller than that of the cement pile 12. A cement seat 13 is provided in the foundation of the upper end of the cement pile 12. The cement seat 13 fixes the upper ends of the cement piles 12 into one body. The seat 13 is reinforced by secondary pouring between the upper ends of each cement pile 12 to further improve the impact resistance of the wall formed by the cement piles 12. Anchor nails 14 are pre-buried on the inner side of the cement seat 13, and steel plates 141 are provided between the outer ends of the anchor tops. The steel plates 141 are fixedly connected with diagonal braces 15, and the lower ends of the diagonal braces 15 are supported on the bottom surface of the foundation pit. The planar structure of the outer side of the cement seat 13 with a square cross-section is conducive to the rapid and stable docking of the anchor and the diagonal brace 15, thereby improving the connection and installation speed of the diagonal brace 15 and the stability of the internal support.

[0021] The cement piles 12 are arranged in a staggered manner and connected to each other to form an integrated retaining wall structure. The cement piles 12 are arranged in two rows, with a spacing between the two rows of cement piles 12. A number of pressure plates 16 are arranged at equal intervals between adjacent cement seats 13. The pressure plates 16 provide lateral connection support between the two cement seats 13, which can further improve the structural strength and stability between the cement piles 12.

[0022] The reinforced support structure of this embodiment utilizes the I-beam to improve the overall strength of the cement pile 12.

[0023] Two rows of cement piles 12 are arranged with a certain interval between them, and at the same time, each row of adjacent cement piles 12 adopts a staggered structure, so that the pressure of the soil outside the foundation pit can be resisted step by step, forming a stable and reliable retaining wall structure, which can well cope with the foundation pit retaining tasks in areas with soft soil and avoid deformation or even collapse of the retaining wall.

[0024] Example 2, see the attached specification Figure 1 On the basis of the first embodiment, this embodiment is provided with a concrete retaining wall 17 between the outer sides of the cement piles 12, and the lower end of the concrete retaining wall 17 is connected as a whole with the cement seat 13. The concrete retaining wall 17 protrudes from the ground surface for protection, so as to prevent the construction tools and building materials outside the foundation pit from falling into the foundation pit, thereby ensuring the safety of the foundation pit construction. A row of wooden piles 18 are inserted into the foundation outside the concrete retaining wall 17, and the wooden piles 18 support the concrete retaining wall 17 on the outside. Combined with the structure in which the inner side of the concrete retaining wall 17 is connected as a whole with the cement seat 13, the stability of the concrete retaining wall 17 is improved.

[0025] A support platform 19 with a trapezoidal cross-section is provided in the foundation pit inside the cement pile 12. The outer side surface of the support platform 19 is in contact with the cement pile 12, and a cement support pile 20 is provided in the foundation pit. A square steel frame 201 is inserted into the cement support pile 20. The lower end of the diagonal brace rod 15 is fixedly connected to the upper end of the square steel frame 201. The diagonal brace rod 15 is an I-beam. The cement support platform 19 combined with the diagonal brace rod 15 can provide internal support for the cement column inside the foundation pit, thereby further improving the stability of the wall formed by the cement column.

Claims

1. A double-pile diagonal bracing type foundation pit side wall reinforcement support structure, characterized by: It includes cement piles arranged at equal intervals along the length or width direction of the side of the foundation pit, steel columns are vertically inserted into the cement piles, the size of the steel columns is smaller than the size of the cement piles, and a cement seat is arranged in the foundation at the upper end of the cement pile. The cement seat fixes the upper ends of each cement pile into one body, anchor nails are pre-buried on the inner side of the cement seat, and steel plates are arranged between the outer ends of the anchor tops, diagonal braces are fixedly connected to the steel plates, and the lower ends of the diagonal braces are supported on the bottom surface of the foundation pit.

2. A double-pile diagonal bracing foundation pit side wall reinforcement support structure according to claim 1, characterized in that: The cement piles are arranged in a staggered manner and are connected to each other to form a whole.

3. The double-pile diagonal bracing foundation pit side wall reinforcement support structure according to claim 1 is characterized in that: The cement piles are arranged in two rows, and a distance is provided between the two rows of cement piles.

4. The double-pile diagonal bracing type foundation pit side wall reinforcement support structure according to claim 3 is characterized by: A number of top plates are arranged at equal intervals between adjacent cement seats.

5. The double-pile diagonal bracing type foundation pit side wall reinforcement support structure according to claim 1 is characterized by: A concrete retaining wall is arranged between the outer sides of the cement piles, and the lower end of the concrete retaining wall is connected with the cement seat as a whole.

6. The double-pile diagonal bracing type foundation pit side wall reinforcement support structure according to claim 5 is characterized in that: A row of wooden piles is inserted into the foundation outside the concrete retaining wall.

7. The double-pile diagonal bracing type foundation pit side wall reinforcement support structure according to claim 1 is characterized by: A support platform with a trapezoidal cross section is arranged in the foundation pit inside the cement pile, and the outer side surface of the support platform contacts the cement pile.

8. The double-pile diagonal bracing type foundation pit side wall reinforcement support structure according to claim 1 is characterized by: Cement support piles are arranged in the foundation pit, a square steel frame is inserted into the cement support piles, and the lower end of the diagonal support rod is fixedly connected to the upper end of the square steel frame.

9. The double-pile diagonal bracing type foundation pit side wall reinforcement support structure according to claim 1 is characterized by: The steel columns and diagonal braces are all I-beams.

Images