Telescopic formwork for cast-in-place concrete support of diaphragm wall and guide wall

Abstract

The utility model discloses an underground diaphragm wall guide wall cast-in-place concrete support telescopic template, which comprises two carrying pole beams, a suspender and a concrete support steel template, the two carrying pole beams are arranged on two symmetrical guide walls in parallel, the suspender is suspended between the two carrying pole beams, the two carrying pole beams are used as suspension stress rod pieces of the suspender, and the concrete support steel template is arranged on the concrete support steel template. The middle of the hanging rod is arranged in a concave shape, two ends of the hanging rod are respectively provided with a hook used for being hooked and hung on two carrying pole beams, the middle of the hanging rod is bent in a concave rectangular shape, the concrete supporting steel formwork is in a square groove shape, and the concrete supporting steel formwork is placed and fixed in the concave rectangular shape in the middle of the hanging rod. The telescopic formwork for the cast-in-place concrete support of the ground connecting wall and the guide wall has the advantages of being simple in structure, convenient to use, high in assembly efficiency, high in precision, safe, reliable and the like, and can meet the construction requirement for pouring the concrete support on the concrete guide wall.

Description

Technical Field

[0001] This utility model relates to the technical field of construction auxiliary devices for diaphragm wall guide walls, specifically to a retractable formwork for cast-in-place concrete support of diaphragm wall guide walls. Background Technology

[0002] With the booming development of the construction industry, my country's construction technology is becoming more and more advanced. During the construction process, a construction technology for underground continuous walls has emerged. Because concrete underground continuous walls have advantages such as high wall rigidity, good seepage prevention effect, applicability to various different geological conditions, low construction noise, small footprint, and high construction efficiency, they are now widely used in foundation pit support and urban underground space enclosure construction. Before the construction of the diaphragm wall, the construction of the guide wall is one of the necessary procedures.

[0003] After the diaphragm wall guide wall is constructed, it is subjected to lateral pressure from the soil on both sides. If the guide wall support is not constructed in time, it may deform due to excessive deformation of the soil beneath the guide wall or insufficient rigidity of the guide wall itself, or even collapse, preventing the reinforcement cage from being lowered smoothly and affecting the construction of the diaphragm wall. Therefore, it is necessary to install supports for the guide wall. Traditionally, square timber supports are used. This method has problems such as difficulty in controlling the length of the square timber, difficulty in cutting the timber to the same width as the guide wall, waste if the length is too short, and gaps often exist between the square timber and the guide wall, resulting in uneven stress and poor support effect. Applied research has found that reinforced concrete supports are the most robust support; therefore, it is necessary to design a cast-in-place formwork for the cast-in-place concrete support of the diaphragm wall guide wall. Summary of the Invention

[0004] The purpose of this utility model is to address the problems existing in the prior art by providing a retractable formwork for cast-in-place concrete support of diaphragm wall guide walls. This retractable formwork for cast-in-place concrete support of diaphragm wall guide walls has the advantages of simple structure, convenient use, high assembly efficiency, high precision, and safety and reliability, and can meet the needs of concrete support construction for concrete guide wall pouring.

[0005] This utility model is achieved using the following technical solution:

[0006] A retractable formwork for cast-in-place concrete support of a diaphragm wall guide wall includes two spreader beams, a hanger rod, and a concrete support steel formwork. The two spreader beams are placed parallel to each other on two symmetrical guide walls, and a hanger rod is suspended between the two spreader beams. The two spreader beams serve as the suspension force-bearing members of the hanger rod. The middle of the hanger rod is concave, and hooks are respectively provided at both ends for suspending the two spreader beams. The middle of the hanger rod is a concave rectangular bend. The concrete support steel formwork is square-shaped and is placed and fixed within the concave rectangular shape of the hanger rod. The two spreader beams are perpendicular to the edges of the guide walls and the hanger rod, and the central axis of the two spreader beams is parallel to the central axis of the concrete support steel formwork. During assembly, the strength of the guide wall wing plates reaches more than 50% to prevent the spreader beams from crushing the guide wall wing plates. After the hanger is installed, the supporting concrete can be poured. The distance between the two spreader beams is the width of the concrete guide wall support + 10cm. The elevation of the spreader beams can be adjusted by placing wooden boards under the spreader beams.

[0007] Further preferred embodiments: the spreader beam is made of cut steel profiles, such as I-beams and channel steel; the hanger rod is made of bent threaded steel bars or plain round steel bars, with both ends bent into hook shapes and the middle bent into a guide wall support shape, i.e., rectangular, for concrete support steel formwork; the steel bars are cut according to the set dimensions and processed into shape using a bending machine; the concrete support steel formwork is made of steel plates.

[0008] A further preferred embodiment: The concrete support steel formwork includes an I-shaped outer support plate and an L-shaped outer support plate. The bottom plates of the I-shaped and L-shaped outer support plates are vertically connected to form a channel-shaped steel formwork. The outer plates of the I-shaped and L-shaped outer support plates are parallel to each other. Both the I-shaped and L-shaped outer support plates are hollow at the same end. An I-shaped inner support plate is movably inserted into the hollow end of the I-shaped outer support plate, and an L-shaped inner support plate is movably inserted into the hollow end of the L-shaped outer support plate. The insertion ends of the I-shaped and L-shaped inner support plates are respectively fixedly connected to springs for compression and reset. When the I-shaped and L-shaped inner support plates are compressed, the springs are squeezed. When the I-shaped and L-shaped inner support plates are released, under the action of the springs, the I-shaped and L-shaped inner support plates will pop out from the I-shaped and L-shaped outer support plates, thereby achieving a retractable function.

[0009] The locally produced telescopic formwork for cast-in-place concrete support of guide walls allows for quick and accurate assembly via a spreader beam, hangers, and supporting formwork. Concrete can be poured rapidly after assembly. This telescopic formwork can adapt to and support guide walls with varying spacing. Compared to wooden supports, it avoids issues such as difficulty in controlling length, frequent gaps with the guide wall, uneven stress distribution, and poor support effectiveness. Furthermore, it eliminates the risk of displacement or collapse of the guide wall if soil pressure on either side is high. This telescopic formwork can flexibly adapt to the guide wall length, is cost-effective, avoids on-site welding, and is simple, quick to dismantle, and reusable. Attached Figure Description

[0010] Figure 1 A structural diagram of a retractable formwork supporting the cast-in-place concrete of the local diaphragm wall guide wall;

[0011] Figure 2 This is a structural schematic diagram of the suspension rod;

[0012] Figure 3 This is a schematic diagram of the steel formwork supporting the concrete structure.

[0013] Figure 4 A schematic diagram of the exploded structure of the steel formwork supporting the concrete.

[0014] Figure 5 A three-dimensional structural diagram of the placement of the retractable formwork for supporting the cast-in-place concrete of the local diaphragm wall guide wall;

[0015] Figure 6 A side view of the installation structure of the retractable formwork supporting the cast-in-place concrete of the local diaphragm wall guide wall.

[0016] The component names corresponding to the serial numbers in the diagram are:

[0017] 1. Spreader beam, 2. Hanger rod, 3. Concrete support steel formwork, 4. Guide wall, 5. I-shaped support inner plate, 6. L-shaped support inner plate, 7. I-shaped support outer plate, 8. L-shaped support outer plate, 9. Spring. Detailed Implementation

[0018] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, without conflict, embodiments and features of the present invention can be combined with each other. The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking," etc., should be interpreted broadly, encompassing fixed connections, detachable connections, and mechanical connections. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances. In particular, the dimensions of the template in this utility model are for reference only and can be adjusted according to actual needs.

[0020] Example 1

[0021] refer to Figures 1 to 4

[0022] A retractable formwork for cast-in-place concrete support of a diaphragm wall guide wall includes two spreader beams 1, a hanger rod 2, and a concrete support steel formwork 3. The spreader beams 1 are placed on two symmetrical guide walls 4, which are cast in concrete. The width of the guide walls is determined according to the site design. A hanger rod 2 is suspended between the two spreader beams 1, with the two spreader beams 1 serving as the suspension force-bearing members of the hanger rod 2. The hanger rod 2 has a concave shape in the middle, and hooks at both ends for suspending the two spreader beams 1. The middle of the hanger rod 2 has a concave rectangular bend. The concrete support steel formwork 3 is a square groove, and it is placed and fixed within the concave rectangular shape of the hanger rod 2.

[0023] Materials required for fabricating retractable formwork for cast-in-place concrete supports of diaphragm wall guide walls:

[0024] Carrying beam 1: Made of steel, its length and guide wall width are determined, and it is 1m longer than the width of guide wall 4.

[0025] Hanger 2: Made of threaded steel, bent into shape using a bending machine, the length of which is determined by the size of the concrete support and the distance from the concrete support to the spreader beam.

[0026] Concrete support steel formwork 3: It is made of a combination of steel blocks and springs, and the size is determined according to the size of the concrete support.

[0027] refer to Figures 5 to 6 Install the spreader beam:

[0028] Place two spreader beams 1 on the wing plates of the guide wall 4, with the spacing matching the width of the guide wall support. The elevation can be adjusted using wooden blocks. The two spreader beams 1 are perpendicular to the edges of the guide walls 4 on both sides and the hanger rods 2, respectively, and the central axis of the two spreader beams 1 is parallel to the central axis of the concrete support steel formwork 3. Note: During assembly, the strength of the guide wall wing plates must reach at least 50% to prevent the spreader beams 1 from crushing the wing plates.

[0029] Install the hanger:

[0030] The hanger rod 2 uses two threaded steel bars. The two ends of the two threaded steel bars are respectively equipped with hooks for hooking onto the two flat beams 1. The middle of the hanger rod 2 is bent into a concave rectangle to fix the concrete support steel formwork 3.

[0031] Install steel formwork:

[0032] The concrete support steel formwork 3 includes an I-shaped support outer plate 7 and an L-shaped support outer plate 8. The bottom plates of the I-shaped support outer plate 7 and the L-shaped support outer plate 8 are vertically connected to form a channel-shaped steel formwork. The outer plates of the I-shaped support outer plate 7 and the L-shaped support outer plate 8 are parallel to each other. Both the I-shaped support outer plate 7 and the L-shaped support outer plate 8 are hollow at the same end. An I-shaped support inner plate 5 is movably inserted into the hollow end of the I-shaped support outer plate 7, and an L-shaped support inner plate 6 is movably inserted into the hollow end of the L-shaped support outer plate 8. The insertion ends of the I-shaped support inner plate 5 and the L-shaped support inner plate 6 are respectively fixedly connected to springs 9 for compression and reset. When the I-shaped support inner plate 5 and the L-shaped support inner plate 6 are compressed, the springs 9 are squeezed. When the I-shaped support inner plate 5 and the L-shaped support inner plate 6 are released, under the force of the springs 9, the I-shaped support inner plate 5 and the L-shaped support inner plate 6 will pop out from the I-shaped support outer plate 7 and the L-shaped support outer plate 8, thereby realizing the telescoping function. The length of the channel-shaped steel formwork is shorter than the guide wall spacing. During use, after the ends of the channel-shaped steel formwork compress the I-shaped support inner plate 5 and the L-shaped support inner plate 6, they are released by the elastic force of spring 9, allowing them to pop out independently. The pop-out length of spring 9 meets the on-site construction requirements of the guide wall, and the concrete support steel formwork 3 can automatically adapt to the width of the guide wall. Sealing strips are used to fill the joints of the formwork to prevent cement slurry leakage. After the hangers are installed, concrete support can be poured.

[0033] The above description is not intended to limit the present utility model, nor is the present utility model limited to the above examples. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A retractable formwork for cast-in-place concrete support of diaphragm wall guide wall, characterized in that: The system includes two flat beams (1), a hanging rod (2), and a concrete support steel formwork (3). The flat beams (1) are placed on two symmetrical guide walls (4). The hanging rod (2) is suspended between the two flat beams (1). The two flat beams (1) serve as the suspension members of the hanging rod (2). The middle of the hanging rod (2) is concave. Hooks are provided at both ends of the hanging rod (2) for hooking onto the two flat beams (1). The middle of the hanging rod (2) is a concave rectangular bend. The concrete support steel formwork (3) is square-shaped and is placed and fixed within the concave rectangular shape of the hanging rod (2). The template (3) includes an I-shaped support outer plate (7) and an L-shaped support outer plate (8). The bottom plates of the I-shaped support outer plate (7) and the L-shaped support outer plate (8) are vertically connected to form a channel steel template. The outer plates of the I-shaped support outer plate (7) and the L-shaped support outer plate (8) are parallel to each other. The same end of the I-shaped support outer plate (7) and the L-shaped support outer plate (8) are hollow. The hollow end of the I-shaped support outer plate (7) is movably inserted with an I-shaped support inner plate (5). The hollow end of the L-shaped support outer plate (8) is movably inserted with an L-shaped support inner plate (6). The insertion ends of the I-shaped support inner plate (5) and the L-shaped support inner plate (6) are respectively fixedly connected with springs (9) for compression and reset.

2. The retractable formwork for cast-in-place concrete support of diaphragm wall guide wall according to claim 1, characterized in that: The flat beam (1) is made of cut steel profiles; the hanger (2) is made of bent threaded steel bars or plain round steel bars, with the two ends of the hanger (2) bent into hook shapes and the middle concave bent into guide wall support shapes; the concrete support steel formwork (3) is made of steel plates.

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