Section steel force transmission component for pit division construction of foundation pit
By using steel force-transfer components in the construction of foundation pit division, the problems of inconvenience in transmitting earth pressure and difficulty in transportation after demolition of traditional concrete support belts are solved, and the construction progress and resource conservation are improved.
Patent Information
- Application Number
- CN202420904497.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-28
AI Technical Summary
In the construction of foundation pit splitting, traditional concrete support belts are difficult to efficiently transmit earth pressure, and the concrete blocks are inconvenient to transport after demolition, which affects the construction progress.
The steel force transmission member is adopted, including the steel body and flange assembly. The steel body passes through the holes in the pit wall of the foundation pit, and transmits earth pressure through the flange assembly composed of the basement structure beam/plate, force transmission plate and stiffener rib.
After the construction of the basement structure on both sides is completed, the pit-divided wall is easily removed, and the concrete blocks are directly lifted through the gaps in the roof panel, which improves the construction progress and safety, and reduces the waste of steel bars and concrete.
Smart Images
Figure CN222632267U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of building construction, and in particular relates to a steel force transmission component used for foundation pit sub-pit construction. Background Art
[0002] Basement pit construction is mainly used in the construction of large basements or underground structures. The method of basement pit construction involves dividing the entire basement area into several small pits, and then excavating and constructing them one by one. The purpose of this is to control engineering risks, especially in complex geological conditions or high water levels.
[0003] During the construction process, especially for the construction of deeper basement sub-pits or adjacent foundation pits, common practices include the following steps: (1) excavating one side of the sub-pit; (2) constructing the basement structural beams or slabs on the side of the first excavation; (3) after the construction of the structural beams or slabs is completed, pouring traditional concrete replacement support strips, at which time the soil pressure of the foundation pit is transferred to the foundation pit sub-pit wall through the concrete replacement support strips; (4) after completing one side, excavating the soil on the other side, and repeating the above-mentioned construction of the structural beams or slabs and pouring of the concrete replacement support strips; (5) dismantling the foundation pit sub-pit walls and concrete replacement support strips at intervals, and carrying out reinforced concrete construction to connect the earth side pressures on both sides of the sub-pit.
[0004] In traditional pit construction, it is usually necessary to dismantle the pit walls and replacement support belts layer by layer from top to bottom. This means that only when the basement structures on both sides of the previous layer are closed can the replacement support construction of the next layer be continued. In addition, it is inconvenient to transport the dismantled concrete blocks out, and they can only be transported out of the pit through the basement. Therefore, it is urgent to provide a steel force transmission component for pit construction. Utility Model Content
[0005] The utility model aims to solve the deficiencies in the prior art and provide a steel force transmission component for foundation pit sub-pit construction.
[0006] The specific technical solutions adopted by this utility model are as follows:
[0007] The utility model provides a steel force transmission component for foundation pit sub-pit construction, comprising a steel body and flange components on both sides; the flange components comprise a force transmission plate and stiffening ribs; the force transmission plate is vertically fixed on the wing plates on both sides of the steel body, and stiffening ribs are arranged between the force transmission plate and the wing plates of the steel body;
[0008] The steel body passes through the hole opened on the foundation pit partition wall, and one end of the steel body is connected to the basement structure beam / plate on the side of the first excavated earth; the force transfer plate supports the first excavated earth side of the foundation pit partition wall, so that the earth pressure on the first excavated earth side is transmitted to the foundation pit partition wall through the force transfer plate; the other end of the steel body is connected to the basement structure beam / plate on the side of the later excavated earth, so that the earth pressure on the later excavated earth house side is transmitted through the steel body.
[0009] Preferably, the steel body is made of H-shaped steel, I-shaped steel or channel steel.
[0010] Preferably, the steel body is made of 18# H steel.
[0011] Preferably, the force transfer plate is welded to the wing plate of the steel body.
[0012] Preferably, the stiffening ribs are welded between the force plate and the wing plate of the steel body.
[0013] Preferably, the force transfer plate and the stiffening ribs are both made of iron plates.
[0014] Preferably, the force transmission plate has a size of 150×200 mm and a thickness of 15 mm.
[0015] Preferably, the stiffening rib has a size of 150×150 mm and a thickness of 15 mm.
[0016] Preferably, both ends of the steel body are connected to the basement structure beams / slabs by anchoring.
[0017] Furthermore, the length of the two ends of the steel body anchored in the basement structure beam / slab is 1000-1500 mm.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] The utility model provides a steel force transmission component for foundation pit sub-pit construction. The two ends of the steel main body in the component are respectively anchored to the basement structure beam / slab, which can not only ensure construction safety, but also facilitate the removal of the sub-pit wall after the basement structure construction on both sides is completed. The removed concrete blocks can be directly hoisted out of the basement through the gap in the top plate, thereby speeding up the construction progress.
[0020] In addition, the steel force transmission component does not need to be destroyed during the removal of the pit wall, and the component can still be used as an embedded component to connect the reinforced concrete structure of the foundation pit on both sides. In subsequent construction, the formwork is directly supported and concrete is poured, which reduces the use of steel bars and the waste of concrete, which is both economical and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1A schematic diagram of a steel force transmission component for foundation pit sub-pit construction provided in this embodiment;
[0022] Figure 2 A cross-sectional view of a steel force transmission component used for foundation pit sub-pit construction provided in this embodiment;
[0023] Figure 3 A schematic diagram of the connection between the steel force transmission member provided in this embodiment and the first excavated earth side;
[0024] Figure 4 A schematic diagram of the connection between the steel force transmission member provided in this embodiment and the rear excavation side;
[0025] In the figure: steel body 1, flange assembly 2, force transfer plate 3, stiffening rib 4, foundation pit partition wall 5, basement structural beam / slab 6. DETAILED DESCRIPTION
[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below. The technical features in each embodiment of the utility model can be combined accordingly without conflicting with each other.
[0027] In the description of the present utility model, it is necessary to understand that when an element is considered to be "connected" to another element, it can be directly connected to another element or indirectly connected, that is, there are intermediate elements. On the contrary, when an element is said to be "directly" connected to another element, there are no intermediate elements.
[0028] This embodiment, as a preferred embodiment of the utility model, provides a steel force transmission component for foundation pit sub-pit construction. Figure 1 and Figure 2 As shown, the steel force transmission member comprises a steel body 1 and flange components 2 on both sides. The steel body 1 comprises flanges on both sides and a vertical web in the middle of the flanges.
[0029] H-shaped steel is often used in large-span, heavy-load building structures because of its wider flange and better bending resistance. In order to improve the pressure-bearing capacity of the steel force-transmitting component, in this embodiment, the steel main body 1 adopts 18#H-shaped steel. It should be noted that the steel main body 1 can also adopt other H-shaped steels, I-beams or channel steels. The utility model does not limit the specific material and model of the steel main body 1. Those skilled in the art can select the appropriate steel according to the specific working conditions through force verification.
[0030] In the component of the utility model, the flange assembly 2 includes a force transfer plate 3 and a stiffening rib 4. The bottom of the force transfer plate 3 is vertically fixed to the flanges on both sides of the steel body 1 by welding. In addition, the stiffening rib 4 is arranged between the force transfer plate 3 and the flange of the steel body 1. The stiffening rib 4 is also fixed between the force transfer plate 3 and the flange of the steel body 1 by welding.
[0031] In this embodiment, iron plates are selected for the force transfer plate 3 and the stiffening ribs 4. The selected force transfer plate 3 has a size of 150×200 mm and a thickness of 15 mm, and the selected stiffening ribs 4 have a size of 150×150 mm and a thickness of 15 mm. Those skilled in the art can select appropriate force transfer plates 3 and stiffening ribs 4 according to specific working conditions through force verification calculations.
[0032] In the construction of basement structures, foundation pit partition walls are a temporary or semi-permanent support structure used to keep soil stable during excavation to prevent soil collapse and water infiltration. Foundation pit partition walls are usually set at the boundaries of the basement to divide the entire foundation pit area into several small pits for excavation and construction one by one. In this embodiment, the foundation pit partition walls 5 are provided with a plurality of holes for passing the steel body 1 at intervals.
[0033] It should be noted that the construction of foundation pit partition walls is a routine operation that can be mastered by technical personnel in this field, and the utility model does not impose specific restrictions on the results of foundation pit partition walls.
[0034] In the component of the utility model, the steel body 1 passes through the hole opened on the foundation pit partition wall 5, and one end of the steel body 1 is connected to the basement structural beam / plate 6 on the first excavated earth side by anchoring. The force transfer plate 3 supports the first excavated earth side of the foundation pit partition wall 5, so that the earth pressure on the first excavated earth side is transmitted to the foundation pit partition wall 5 through the force transfer plate 3. The other end of the steel body 1 is connected to the basement structural beam / plate 6 on the later excavated earth side, so that the earth pressure on both sides is transmitted through the steel body 1.
[0035] It should be noted that the specific length of the steel anchored into the basement structural beam / slab needs to comprehensively consider factors such as load requirements, size and material of the steel, strength of the basement structural beam / slab, and requirements of building codes in different regions to ensure the safety and stability of the structure. Those skilled in the art can make a selection based on specific working conditions.
[0036] In this embodiment, the anchoring length of both ends of the steel body 1 into the basement structural beam / slab 6 is 1000 mm. However, it is also acceptable to select the anchoring length to be 1000-1500 mm.
[0037] The following provides the specific process of using this steel force transmission component for foundation pit sub-pit construction. Figure 3 and Figure 4 shown.
[0038] S1: Construction on the excavation side first: Install the steel body 1 of the steel force transmission component, one end of the steel body 1 is anchored into the basement structure beam / slab 1000mm, and the other end of the steel body 1 passes through the reserved hole on the foundation pit branch wall 5. The force transmission plate 3 supports the wall of the foundation pit branch wall 5 on the first excavation side, so that the earth pressure is transmitted to the foundation pit branch wall 5 through the force transmission plate 3, ensuring the safety of the first excavation side branch.
[0039] S2: Post-excavation earthwork construction: The other end of the steel body 1 is anchored into the basement structure beam / slab 1000mm, so that the earthwork pressure on both sides of the foundation pit partition wall 5 is transmitted through the steel body 1 to ensure the safety of the partition construction.
[0040] S3: After the construction of the basements on both sides is completed, the foundation pit partition wall 5 is removed and the concrete blocks are hoisted out of the basement. Formwork is set up under and around the steel force transmission member, steel bars are inserted, and concrete is poured to connect the basement structures on both sides of the foundation pit partition wall 5 into one.
[0041] The above embodiment is only a preferred solution of the utility model, but it is not intended to limit the utility model. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, all technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the utility model.
Claims
1. A steel force transmission component used for foundation pit sub-pit construction, characterized in that: The invention comprises a steel body (1) and flange components (2) on both sides; the flange components (2) comprise a force transmission plate (3) and stiffening ribs (4); the force transmission plate (3) is vertically fixed to the wing plates on both sides of the steel body (1), and stiffening ribs (4) are arranged between the force transmission plate (3) and the wing plates of the steel body (1); The steel body (1) passes through a hole provided on the foundation pit partition wall (5), and one end of the steel body (1) is connected to a basement structural beam / plate (6) on the side of the first excavated earthwork; the force transmission plate (3) supports the first excavated earthwork side of the foundation pit partition wall (5), so that the earthwork pressure on the first excavated earthwork side is transmitted to the foundation pit partition wall (5) through the force transmission plate (3); the other end of the steel body (1) is connected to a basement structural beam / plate (6) on the side of the later excavated earthwork, so that the earthwork pressure on the later excavated earthwork side is transmitted through the steel body (1).
2. The steel force transmission member for foundation pit sub-pit construction according to claim 1 is characterized in that: The steel body (1) is made of H-shaped steel, I-shaped steel or channel steel.
3. The steel force transmission member for foundation pit sub-pit construction according to claim 1 is characterized in that: The steel body (1) is made of 18# H steel.
4. The steel force transmission member for foundation pit sub-pit construction according to claim 1 is characterized in that: The force transmission plate (3) is welded to the wing plate of the steel body (1).
5. The steel force transmission member for foundation pit sub-pit construction according to claim 1 is characterized in that: The stiffening rib (4) is welded between the force plate (3) and the wing plate of the steel body (1).
6. The steel force transmission member for foundation pit sub-pit construction according to claim 1 is characterized in that: The force transmission plate (3) and the stiffening rib (4) are both made of iron plates.
7. The steel force transmission member for foundation pit sub-pit construction according to claim 1 is characterized in that: The force transmission plate (3) has a size of 150×200 mm and a thickness of 15 mm.
8. The steel force transmission member for foundation pit sub-pit construction according to claim 1 is characterized in that: The size of the stiffening rib (4) is 150×150 mm and the thickness is 15 mm.
9. The steel force transmission member for foundation pit sub-pit construction according to claim 1, characterized in that: Both ends of the steel body (1) are connected to the basement structure beam / slab (6) by anchoring.
10. The steel force transmission member for foundation pit sub-pit construction according to claim 9, characterized in that: The length of the two ends of the steel body (1) anchored in the basement structural beam / slab (6) is 1000-1500 mm.