Suspension type vertical shaft wall bottom protection device

Abstract

The utility model discloses a suspension type vertical shaft wall bottom protection device, and aims to solve the problems that the construction quality of an upper-layer contact surface and a lower-layer contact surface of an existing suspension type vertical shaft wall is poor, and a steel bar body is inaccurate in direction and easy to corrode when going deep into lower-layer earthwork. The device mainly comprises a soil fixing bottom template and a cup stand, the soil fixing bottom formwork comprises a bottom formwork body and side formwork bodies correspondingly arranged on the periphery of the bottom formwork body. A guide cylinder is arranged at the bottom of the bottom template, is of a hollow structure and is correspondingly communicated with the bottom template; the cup stand is correspondingly arranged in the guide cylinder in a sleeved mode, and the cup stand is of a hollow structure and used for allowing a steel bar body to pass through. By arranging the bottom formwork with the guide cylinder and the cup stand, direction guide and protection are provided for the steel bar body, it is ensured that the vertical installation position of the steel bar body is accurate, direct contact with the soil body is avoided, the bottom formwork is arranged between the well wall concrete and the lower-layer earthwork, direct contact between the concrete and the earthwork is avoided, and the construction efficiency is improved. And the concrete construction quality of the contact surface of the upper and lower well walls is improved.

Description

Technical Field

[0001] The present application relates to the field of geotechnical engineering technology, and in particular to a suspended vertical shaft wall bottom protection device. Background Art

[0002] The suspended shaft construction method is a reverse construction technology for underground foundation pit support and underground structures. Its construction process uses part of the pile foundation as the supporting structure, excavates the foundation pit and constructs the cylindrical structure separately, combines the shaft plane support with the structure itself, uses the concrete shaft wall's own resistance to resist the underground horizontal force, excavates the earth layer by layer and casts each layer of underground structure until the bottom is sealed to complete the shaft structure. This method has a small excavation area, fast construction speed, low project cost, high construction safety, and little impact on the surrounding environment of the construction. It has broad research and development prospects and practicality.

[0003] In the hanging construction process, the excavation of the lower earth and the construction of the shaft wall can only be carried out after the upper shaft wall is completed. In order to ensure the firmness of the connection between the upper and lower shaft walls, the upper steel bars are penetrated into the lower earth while the upper shaft wall is constructed, so as to overlap with the steel bars of the lower shaft wall. In the prior art known to the inventors, the process of deepening the steel bars is to drill holes first and then directly insert the steel bars into the holes. However, in the process of implementing the technical solution in the embodiments of the present application, the inventors of the present application found that the insertion direction of the steel bar body of the above-mentioned technology is easy to deviate from the preset direction, and the steel bar body inserted into the soil is easy to be corroded and damaged.

[0004] The information disclosed in this background technology section is only used to deepen the understanding of the background technology of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0005] In view of at least one of the above technical problems, the present disclosure provides a bottom protection device for a suspended vertical shaft wall, which provides directional guidance for a steel bar body by providing a bottom template with a guide cylinder and a cup holder sleeved in the guide cylinder, thereby ensuring that the vertical installation position of the steel bar body is accurate and avoids direct contact with the soil. The bottom template is arranged between the shaft wall concrete and the lower layer of earth to avoid direct contact between the concrete and the earth, thereby improving the concrete construction quality of the upper and lower shaft wall contact surfaces, thereby solving the problems of poor construction quality of the upper and lower contact surfaces of the existing suspended vertical shaft wall, and inaccurate direction and easy corrosion of the steel bar body when it penetrates into the lower layer of earth.

[0006] According to one aspect of the present disclosure, there is provided a suspended vertical shaft wall bottom protection device, comprising a soil-fixing bottom template and a cup holder; the soil-fixing bottom template comprises a bottom template and side templates correspondingly arranged around the bottom template; a guide cylinder is provided at the bottom of the bottom template, the guide cylinder is a hollow structure and is correspondingly connected to the bottom template; the cup holder is correspondingly sleeved inside the guide cylinder, the cup holder is a hollow structure for passing a steel bar body.

[0007] In some embodiments of the present disclosure, a boss is provided at a corresponding position on the outer edge of the top end side of the cup holder.

[0008] In some embodiments of the present disclosure, a slurry stop ring for being sleeved outside the steel bar body is provided at a position corresponding to the inner edge of the top end side of the cup holder.

[0009] In some embodiments of the present disclosure, the cup holder is a PVC tube.

[0010] One or more technical solutions provided in the embodiments of the present application have at least any of the following technical effects or advantages:

[0011] 1. Setting the bottom formwork between the upper shaft wall concrete and the lower earthwork can avoid direct contact between the shaft wall concrete and the earthwork, thereby avoiding the occurrence of concrete slag inclusions, and greatly improving the construction quality of the contact surface between the upper and lower shaft wall structures.

[0012] 2. A guide cylinder with a hollow interior and connected to the top of the bottom template is provided at the bottom of the bottom template to allow the cup holder and the steel bar to pass through and guide the cup holder and the steel bar when they are vertically inserted into the earthwork, so that the vertical installation position of the cup holder and the steel bar is accurate, thereby improving construction efficiency and quality.

[0013] 3. Installing a cup holder outside the steel bar body can prevent the steel bar body from being directly inserted into the earth, thereby avoiding soil pollution and corrosion of the steel bar body and ensuring the quality of the steel bar body and shaft construction; in addition, after the lower earthwork is excavated, the soil-solidifying bottom template and the cup holder can be directly removed to carry out the construction of the lower shaft wall, eliminating the process of removing the soil residue outside the steel bar body, greatly shortening the construction time, and ensuring the rapid completion of the shaft wall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a suspended vertical shaft wall bottom protection device in one embodiment of the present application.

[0015] Figure 2 for Figure 1 Enlarged schematic diagram of part A in the middle.

[0016] In the above figures, 1 is the bottom formwork, 2 is the side formwork, 3 is the cup holder, 4 is the reinforcement body, 5 is the guide cylinder, and 6 is the stop ring. DETAILED DESCRIPTION

[0017] In order to better understand the technical solution of the present application, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application. The "connection" and "coupling" involved in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0019] Unless otherwise specified, the components, structures, and mechanisms involved in the following embodiments are conventional commercially available products.

[0020] A suspended vertical shaft is a new type of underground foundation pit construction method. During its construction, the earth is excavated layer by layer and each layer of underground structure is cast until the bottom is sealed and the vertical shaft structure is completed. When each upper shaft wall structure is constructed, its steel bar body needs to be extended downward and penetrated into the lower layer of unexcavated earth to overlap with the steel bars of the lower shaft wall structure to achieve a firm connection between the upper and lower shaft wall structures. In the prior art, when the steel bar body is penetrated downward, it is difficult to determine the direction of the steel bar body, which may cause the steel bar body to deviate from the preset direction. In addition, since the steel bar body is in direct contact with the soil, the steel bar body is easily contaminated and corroded, which affects the construction efficiency and quality. The embodiment of the present application solves the above problems by providing a suspended vertical shaft shaft wall bottom protection device.

[0021] This example discloses a suspended shaft wall bottom protection device, see Figure 1 , including a soil-fixing bottom template and a cup holder 3; the soil-fixing bottom template includes a bottom template 1 and a side template 2.

[0022] See also Figure 1 The bottom template 1 is arranged above the lower layer of unexcavated earthwork, and the side templates 2 are correspondingly connected to each end side of the bottom template 1 to form a trough structure for containing the concrete of the shaft wall structure. The bottom template 1 and the side template 2 are respectively tightly fitted with the bottom and side wall soil to prevent the side wall soil from falling during construction; since the bottom template 1 is arranged at the bottom of the shaft wall structure, the concrete of the shaft wall structure can be prevented from directly contacting with the lower layer of earthwork, thereby solving the problem of concrete slag inclusion in the prior art and improving the construction quality of the contact surface of the upper and lower shaft wall structures.

[0023] See also Figure 2A guide cylinder 5 corresponding to the number and position of the steel bar body 4 is provided at the bottom of the bottom template 1. The guide cylinder 5 is a hollow structure and is connected to the bottom template 1. A cup holder 3 is correspondingly sleeved inside the guide cylinder 5; the cup holder 3 is a hollow PVC tube, and its aperture matches the steel bar body 4 of the upper well wall structure so that the steel bar body 4 can pass through its interior; a boss is correspondingly provided at the corresponding position of the outer edge of the top end side of the cup holder 3, so that the cup holder 3 can be hung on the bottom template 1, and a grout-stopping ring 6 is correspondingly provided at the corresponding position of the inner edge of the top end side of the cup holder 3. The grout-stopping ring 6 is sleeved outside the steel bar body 4, and then the steel bar body 4 is placed in the cup holder 3, and the grout-stopping ring 6 is in close contact with the steel bar body 4 and the cup holder 3, so as to prevent concrete from entering the cup holder 3 when pouring concrete above the bottom template 1. A guide cylinder 5 is provided at the bottom end of the bottom template 1 for the cup holder 3 and the steel bar body 4 to pass through, which can guide the cup holder 3 and the steel bar body 4 when they are vertically inserted into the lower earthwork, so that the vertical installation position of the cup holder 3 and the steel bar body 4 is accurate, thereby improving the construction efficiency and quality; the cup holder 3 is arranged outside the steel bar body 4 to avoid the steel bar body 4 from being directly inserted into the earthwork, thereby avoiding the contamination and corrosion of the steel bar body 4 by the soil, ensuring the construction quality of the steel bar body 4 and the shaft; in addition, after the lower earthwork is excavated, the soil-fixing bottom template 1 and the cup holder 3 can be directly removed to carry out the construction of the shaft wall, eliminating the process of removing the soil residue outside the steel bar body 4, greatly improving the construction efficiency.

[0024] When using this device, first select a suitable soil-fixing bottom template according to the thickness of the hanging shaft wall and the type and spacing of the steel bars, dig a guide groove downwards and fix the bottom template on the upper part of the soil foundation, accurately mark the positioning position on the bottom template, and then use the bottom template as a hole-forming support plate to drill a guide hole downwards (to prevent the hole mouth from being formed), and place the guide cylinder and cup holder of the bottom template in the guide hole, finally insert the steel bar body into the cup holder, and fix the slurry stop ring.

[0025] Although some preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0026] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the inventive concept. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A suspended shaft wall bottom protection device, characterized in that: It includes a soil-fixing bottom template and a cup holder; the soil-fixing bottom template includes a bottom template and side templates correspondingly arranged around the bottom template; a guide cylinder is provided at the bottom of the bottom template, the guide cylinder is a hollow structure and is correspondingly connected to the bottom template; the cup holder is correspondingly sleeved inside the guide cylinder, the cup holder is a hollow structure for passing a steel bar body.

2. The suspended shaft wall bottom protection device according to claim 1 is characterized in that: A boss is correspondingly provided at a position corresponding to the outer edge of the top end side of the cup holder.

3. The suspended shaft wall bottom protection device according to claim 1, characterized in that: A slurry-stopping ring for being sleeved outside the steel bar body is provided at a position corresponding to the inner edge of the top end side of the cup holder.

4. The suspended shaft wall bottom protection device according to claim 1 is characterized in that: The cup holder is a PVC tube.

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