A rapid support system for foundation pits near tower crane foundations

Abstract

This utility model discloses a rapid support system for foundation pits adjacent to tower crane foundations. It includes steel support piles installed on one side of the structural sidewall within the proposed pit. The upper end of the web of each steel support pile has a pre-drilled hole into which several steel cap beams are horizontally inserted. It also includes anchor piles, with steel tie rods connecting the steel cap beams and anchor piles. End plates are welded to the sides of the steel cap beams facing the anchor piles, and the steel tie rods are welded to the end plates and anchor piles. Two stiffening ribs are provided on the inner side of the flange plate of each steel cap beam, corresponding to the flange plate of each steel cap beam. These stiffening ribs are welded to the inner side of the flange plate and the surface of the web of the steel support pile, with one side of the stiffening ribs flush with the pre-drilled hole. This utility model, by horizontally inserting steel cap beams into the pre-drilled holes of the steel support piles, achieves a coordinated effect of stress and deformation, effectively controlling soil deformation and protecting the stability of the tower crane foundation outside the pit. It is convenient and quick to construct, simple to operate, and reusable.

Description

Technical Field

[0001] This utility model relates to the technical field of foundation pit support, and in particular to a rapid support system for foundation pits near tower crane foundations. Background Technology

[0002] In foundation pit projects using sheet pile support in building construction, some special situations may arise. For example, there may be a basement structure with a large burial depth near an existing tower crane foundation. Before excavating the foundation pit, the soil beneath the tower crane foundation needs to be protected, generally requiring soil support. However, to minimize the impact on the tower crane foundation, the foundation pit should be as far away from the tower crane as possible. In extreme cases, a space of about 50mm should be reserved between the outer surface of the support structure and the outer wall of the basement. However, this arrangement results in no space for walers on the inner side of the foundation pit, leading to conflicts between the walers and the structural walls. Furthermore, the inner side of the foundation pit does not have the conditions for installing internal supports. The subsequent construction of crushed stone piles / CFG piles in the soil outside the foundation pit to form a composite foundation will adversely affect the subsequent pile construction, and the conditions for installing anchor bolts / cables are not available. Utility Model Content

[0003] This invention aims to address the shortcomings of existing technologies by providing a rapid support system for foundation pits adjacent to tower crane foundations.

[0004] To achieve the above objectives, this utility model adopts the following technical solution:

[0005] A rapid support system for foundation pits near tower crane foundations includes steel support piles installed on one side of the structural sidewall of the proposed pit. The upper end of the web of the steel support piles has a reserved hole, and several steel cap beams are inserted horizontally into the reserved hole. The system also includes anchor piles, and steel tie rods are connected between the steel cap beams and the anchor piles.

[0006] Several steel cap beams have end plates welded together on their sides, and steel tie rods are welded to the end plates and anchor piles.

[0007] The inner side of the flange plate of the steel support pile is provided with two stiffening ribs corresponding to the flange plate of each steel cap beam. The stiffening ribs are welded to the inner side of the flange plate and the surface of the web plate of the steel support pile, and one side of the stiffening ribs is flush with the reserved hole.

[0008] The end face of the stiffening rib is flush with the end face of the flange plate of the steel support pile.

[0009] The stiffening ribs are 10mm thick.

[0010] Expansion joints are reserved between the steel support piles and the side walls of the proposed pit structure.

[0011] The width of the expansion joint is 50mm.

[0012] The beneficial effects of this utility model are: by horizontally inserting a steel crown beam into the reserved hole at the top of the steel support pile, this utility model plays a role in coordinating the steel support pile to share the force and deformation, effectively controlling soil deformation, effectively protecting the stability of the tower crane foundation outside the pit, and is convenient and quick to construct, simple to operate, and can be reused repeatedly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the reserved hole for medium-sized steel support piles;

[0015] Figure 3 This is a schematic diagram of the welded end plate on the side of the steel cap beam;

[0016] In the diagram: 1-Proposed pit interior structural sidewall; 2-Steel support pile; 3-Expansion joint; 4-Reserved hole; 5-Steel cap beam; 6-Stiffening rib; 7-Steel tie rod; 8-Anchor pile; 9-Exterior tower crane foundation; 10-End plate;

[0017] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0018] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0019] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] like Figures 1 to 3 As shown, a rapid support system for a foundation pit near a tower crane foundation includes steel support piles 2, expansion joints 3, reserved holes 4, steel cap beams 5, stiffening ribs 6, steel tie rods 7, anchor piles 8, and end plates 10.

[0023] Steel support pile 2 is installed on one side of the structural sidewall 1 inside the proposed pit. The steel support pile 2 uses H500×300×11×18 steel. The model and length of the steel support pile 2 are calculated and determined based on the depth of the interface pit and the magnitude of the edge load at the pit opening.

[0024] An expansion joint 3 is reserved between the steel support pile 2 and the proposed pit internal structure side wall 1. The width of the expansion joint 3 is 50mm.

[0025] The upper end of the web of the steel support pile 2 is provided with a reserved hole 4, which is rectangular in shape.

[0026] Several steel crown beams 5 are horizontally inserted into the reserved hole 4.

[0027] Based on the stress on the steel cap beam 5, determine the appropriate specifications and quantity of the steel cap beam 5, and pass it through the pre-reserved hole 4 at the top of the steel support pile 2. For example, if I40b steel is used as the steel cap beam 5, determine the number of sections based on calculations.

[0028] The inner side of the flange plate of the steel support pile 2 is provided with two stiffening ribs 6 corresponding to the flange plate of each steel crown beam 5. The stiffening ribs 6 are welded to the inner side of the flange plate and the web surface of the steel support pile 2. One side of the stiffening ribs 6 is flush with the reserved hole 4.

[0029] The end face of the stiffening rib plate 6 is flush with the end face of the flange plate of the steel support pile 2.

[0030] The stiffening rib 6 has a thickness of 10mm.

[0031] It also includes anchor pile 8, which is made of H500×300×11×18 steel.

[0032] A steel tie rod 7 is connected between the steel cap beam 5 and the anchor pile 8.

[0033] Several steel cap beams 5 have end plates 10 welded to their sides, and steel tie rods 7 are welded to the end plates 10 and anchor piles 8. Disassembly can be performed by simply cutting between the steel tie rods 7 and the end plates 10 and anchor piles 8.

[0034] The steel tie rod 7 is made of I40b steel.

[0035] This utility model addresses the challenge of difficult foundation pit support in some special situations in construction engineering. By appropriately processing steel sheet piles, it achieves the purpose of working together with support piles when the limited space in the pit prevents the installation of capping beams.

[0036] Specifically as follows:

[0037] 1. In areas outside the pit where anchoring structures such as anchor rods / anchor cables are not suitable, vertical steel anchor piles 8 are used as anchoring ends. They can be inserted outside the area between the subsequent crushed stone piles / CFG piles. After the pit support is completed, they are removed and backfilled with cement grout in a timely manner to ensure that the bearing capacity of the subsequent composite foundation is not affected.

[0038] 2. By horizontally inserting the steel crown beam 5 into the reserved hole 4 at the top of the steel support pile 2, it plays a role in coordinating the steel support pile 2 to bear the force and deform together, which can effectively control the soil deformation and effectively protect the stability of the tower crane foundation 9 outside the pit.

[0039] The working process of this utility model is as follows:

[0040] 1. Based on the depth of the interface pit and the magnitude of the edge load at the pit opening, calculate and determine the type and length of the steel support pile 2, and open a reserved hole 4 at the top web position of the steel support pile 2.

[0041] 2. Determine the appropriate specifications and quantity based on the stress on the steel cap beam 5, and pass it through the reserved hole 4 at the top of the steel support pile 2.

[0042] 3. Drive 8 remote anchor piles.

[0043] 4. The end plate 10 is welded to the side of the steel crown beam 5, and the anchor pile 8 and the end plate 10 are connected by steel tie rod 7.

[0044] 5. After the foundation pit is excavated, the construction of the internal structure is completed.

[0045] 6. Remove the steel support pile 2 and backfill the hole with cement grout.

[0046] 7. Cut the steel tie rod 7, remove the anchor pile 8, and at the same time, backfill the anchor pile hole with cement grout.

[0047] This utility model has the following advantages:

[0048] 1. The processing is convenient and quick, the steel profiles are easy and quick to install, and the construction time is short.

[0049] 2. The top steel cap beam model 5 and the number of splices can be appropriately adjusted according to the foundation pit support calculation results, and its application range is relatively wide.

[0050] 3. All steel sections can be recycled after removal, reducing support costs and improving economic efficiency.

[0051] 4. The anchor pile 8 and the steel crown beam 5 are connected by the steel tie rod 7 placed on the ground surface. There is no need to cut grooves on the ground surface. The installation and disassembly are simple and quick, and maintenance and replacement are convenient.

[0052] 5. The position of the anchor piles 8 can be flexibly adjusted according to the size of the tower crane foundation 9 outside the pit. The position of the steel tie rod 7 on the ground surface can be flexibly adjusted according to the position of the anchor piles 8 to avoid conflict with the tower crane foundation 9 outside the pit.

[0053] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A rapid support system for foundation pits adjacent to tower crane foundations, characterized in that, It includes several steel support piles (2) set on one side of the structural sidewall (1) of the proposed pit, with a reserved hole (4) opened at the upper end of the web of the steel support pile (2), and several steel crown beams (5) inserted horizontally in the reserved hole (4); it also includes anchor piles (8), and steel tie rods (7) are connected between the steel crown beams (5) and the anchor piles (8).

2. The rapid support system for foundation pits adjacent to tower crane foundations according to claim 1, characterized in that, Several steel crown beams (5) have end plates (10) welded together on their sides, and steel tie rods (7) are welded to end plates (10) and anchor piles (8).

3. The rapid support system for foundation pits adjacent to tower crane foundations according to claim 1, characterized in that, The inner side of the flange plate of the steel support pile (2) is provided with two stiffening ribs (6) corresponding to the flange plate of each steel crown beam (5). The stiffening ribs (6) are welded to the inner side of the flange plate and the web surface of the steel support pile (2). One side of the stiffening ribs (6) is flush with the reserved hole (4).

4. The rapid support system for foundation pits adjacent to tower crane foundations according to claim 3, characterized in that, The end face of the stiffening rib (6) is flush with the end face of the flange plate of the steel support pile (2).

5. A rapid support system for foundation pits adjacent to tower crane foundations according to claim 4, characterized in that, The stiffening rib (6) has a thickness of 10 mm.

6. The rapid support system for foundation pits adjacent to tower crane foundations according to claim 1, characterized in that, An expansion joint (3) is reserved between the steel support piles (2) and the proposed pit internal structure sidewalls (1).

7. A rapid support system for foundation pits adjacent to tower crane foundations according to claim 6, characterized in that, The width of the expansion joint (3) is 50mm.

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