A permanent and temporary combined pile-slab structure

Abstract

This utility model provides a combined temporary and permanent pile-slab structure, including a mixing wall, a waterproof layer, and a precast concrete slab. The mixing wall comprises multiple vertically extending mixing piles, which are horizontally spaced and connected as a whole. The mixing wall is used to support the foundation pit. Steel sections are installed inside the mixing piles, with the upper ends of the steel sections extending beyond the top of the mixing piles to form beam caps. The beam caps on the mixing piles on the same side are connected as a whole by connectors. The waterproof layer is located on the inner surface of the mixing piles. The precast concrete slab is located on the inner surface of the waterproof layer. This combined temporary and permanent pile-slab structure can be constructed through a combination of on-site construction and on-site assembly of precast components, thereby improving work efficiency. It also allows the multi-layered structure to function in both temporary and permanent support stages, avoiding the demolition and reconstruction costs of traditional support systems. The combination of the mixing wall, waterproof layer, and precast concrete slab enhances waterproof reliability.

Description

Technical Field

[0001] This utility model relates to foundation pit support, and in particular to a permanent and temporary combined pile-slab structure. Background Technology

[0002] Foundation pit support is a key technology to ensure the safety of underground structure construction and the stability of the surrounding environment. Different support schemes are selected according to different geological conditions. Support schemes generally include slope excavation, soil nailing walls, SMW pile method, pile row + internal bracing, etc. Functional requirements can be divided into two major systems: temporary support and permanent-temporary combined support. Permanent-temporary combined support is a reuse of the combination. It serves as temporary support during the construction period and is later combined with the main structure to become a permanent load-bearing system, reducing repeated construction.

[0003] Existing technologies have the problem that water seepage channels can easily form between temporary supports and permanent structures due to construction disturbances and structural deformation, thus affecting the waterproofing performance. Utility Model Content

[0004] To address the problem in the prior art where water seepage channels easily form between temporary supports and permanent structures due to construction disturbances and structural deformation, this utility model proposes a combined temporary and permanent pile-slab structure.

[0005] The technical solution of this utility model is: it includes a mixing wall, a waterproof layer, and a precast concrete slab; The mixing wall consists of multiple mixing piles extending vertically, which are horizontally spaced and connected as a whole. The mixing wall is used to support the foundation pit. The mixing pile has a steel section inside, and the upper end of the steel section extends out of the top of the mixing pile to form a beam crown. The beam crowns on the mixing piles on the same side are connected as one piece by connectors. The waterproof layer is applied to the inner surface of the mixing pile; Precast concrete slabs are placed on the inner side of the waterproof layer.

[0006] Preferably, the connector includes a connecting rod and two nuts, the upper part of the steel profile has a through hole, the connecting rod is provided between multiple steel profiles, and the outer surface of the connecting rod has threaded structures at both ends for the nuts to be threaded. The connecting rods pass through the holes on the steel profile located on the same side in sequence.

[0007] Preferably, the inner side of the steel section is fixedly connected to both the upper and lower ends with connecting sleeves, and the end of the connecting sleeve away from the steel section extends out of the inner side of the mixing pile. The waterproof layer has a clearance opening corresponding to the connecting sleeve, which is used for the connecting sleeve to pass through. The connecting sleeve has a threaded structure, and the connecting disc is threaded onto the connecting sleeve.

[0008] Preferably, the precast concrete slab has a clearance groove for the connecting sleeve to pass through; The end of the connecting sleeve away from the steel profile extends through the inner side of the waterproof layer. The inner wall of the connecting sleeve is provided with a threaded structure, and a connecting screw is connected to the inner thread of the connecting sleeve.

[0009] Preferably, the waterproof layer includes a waterstop and two waterproof fabric layers, the two waterproof fabric layers being fixedly connected to the inner and outer sides of the waterstop, respectively, and the waterstop having an avoidance opening.

[0010] Advantages of this utility model: 1. Construction can be carried out by combining on-site construction and on-site assembly of prefabricated components, thereby improving work efficiency and enabling multi-story structures to play a role in both temporary support and permanent structure stages, avoiding the demolition and reconstruction costs of traditional support systems.

[0011] 2. The reliability of waterproofing is improved by combining a mixing wall, a waterproof layer, and precast concrete slabs.

[0012] 3. No drilling is required on the mixing piles during the installation of the waterproof layer, resulting in less construction disturbance and less structural deformation, thus providing better waterproofing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the main structure of Example 1; Figure 2 This is a front view of the main body of Example 1; Figure 3 This is a side view of the main body of Example 1; Figure 4 This is a schematic diagram of the main exploded structure of Example 1; Figure 5 This is a schematic diagram of the main cross-sectional structure of Example 1.

[0015] In the diagram, 1 is the mixing wall, 2 is the waterproof layer, 3 is the precast concrete slab, 4 is the mixing square pile, 5 is the steel section, 6 is the connecting rod, 7 is the connecting sleeve, 8 is the connecting plate, 9 is the connecting screw, 10 is the waterstop, and 11 is the waterproof fabric layer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1: This example aims to propose a permanent and temporary combined pile-slab structure.

[0018] according to Figures 1-4 As shown, it includes a mixing wall 1, a waterproof layer 2, and a precast concrete slab 3.

[0019] The mixing wall 1 includes multiple vertically extending mixing piles 4, which are horizontally spaced and connected as a whole. The mixing wall 1 is used to support the foundation pit. The mixing piles 4 are equipped with steel sections 5. Specifically, a trench with an opening at the top is excavated in the soil, and then cement grout is poured into the trench for mixing. After the concrete has initially set, the steel sections 5 are inserted. The upper end of the steel sections 5 extends out of the top of the mixing piles 4 to form a beam crown. The beam crowns on the mixing piles 4 on the same side are connected as a whole by connectors.

[0020] The connector includes a connecting rod 6 and two nuts. The upper part of the steel profile 5 has a through hole. The connecting rod 6 is arranged between multiple steel profiles 5. The two ends of the outer surface of the connecting rod 6 have a threaded structure for the nuts to be threaded. The connecting rod 6 passes through the through hole on the steel profile 5 located on the same side in sequence.

[0021] The upper and lower ends of the inner side of the steel section 5 are fixedly connected to the connecting sleeve 7, and the end of the connecting sleeve 7 away from the steel section 5 passes through the inner side of the mixing square pile 4.

[0022] The waterproof layer 2 is provided on the inner side of the mixing pile 4. The waterproof layer 2 has an opening corresponding to the connecting sleeve 7. The opening is used for the connecting sleeve 7 to pass through. The connecting sleeve 7 has a threaded structure. The connecting disc 8 is threaded onto the connecting sleeve 7.

[0023] The waterproof layer 2 includes a waterstop 10 and two waterproof fabric layers 11. The two waterproof fabric layers 11 are respectively fixedly connected to the inner and outer sides of the waterstop 10. The waterstop 10 has an avoidance opening. The waterstop 10 is made of waterproof steel plate. The waterproof fabric layer 11 is made of a two-component material composed of powder and liquid. The powder is cement and quartz sand, and the liquid is a high molecular polymer, such as K11 type acrylic emulsion.

[0024] The precast concrete slab 3 is set on the inner side of the waterproof layer 2, and the precast concrete slab 3 is provided with a clearance groove for the connecting sleeve 7 to pass through. The end of the connecting sleeve 7 away from the steel section 5 extends through the inner side of the waterproof layer 2. The inner wall of the connecting sleeve 7 is provided with a threaded structure, and the connecting sleeve 7 is internally threaded with a connecting screw 9.

[0025] Construction principle: First, the trench is opened step by step, then cement grout is poured into the trench and stirred, and steel section 5 is inserted to form the mixing square pile 4, and then the foundation pit is excavated.

[0026] After the foundation pit is excavated, the mixing wall 1 is used for initial support. The mud and sand inside the mixing wall 1 are cleaned, and then the waterproof layer 2 is installed on the inside of the mixing wall 1 through the connecting sleeve 7 and the connecting plate 8.

[0027] When the project is completed and permanent support is installed, the precast concrete slab 3 is installed on the inner side of the mixing wall 1, so that the waterproof layer 2 is located between the mixing wall 1 and the precast concrete slab 3.

[0028] This allows for construction to be carried out by combining on-site construction with on-site assembly of prefabricated components, thereby improving work efficiency and enabling multi-story structures to play a role in both temporary support and permanent structure stages, avoiding the demolition and reconstruction costs of traditional support systems.

[0029] The waterproofing reliability is further improved by combining the mixing wall 1, the waterproof layer 2, and the precast concrete slab 3.

[0030] Meanwhile, the installation of the waterproof layer 2 does not require drilling holes in the mixing piles 4, resulting in less construction disturbance and less structural deformation, thus providing better waterproofing.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A permanent- temporary combined pile- sheet structure, characterized by: It includes a mixing wall (1), a waterproof layer (2), and a precast concrete slab (3); The mixing wall (1) includes multiple mixing piles (4) extending vertically. The multiple mixing piles (4) are arranged horizontally at intervals and connected as a whole. The mixing wall (1) is used to support the foundation pit. The mixing pile (4) is provided with a steel section (5), the upper end of the steel section (5) extends out of the top of the mixing pile (4) to form a beam crown, and the beam crowns on the mixing pile (4) on the same side are connected as one piece by connectors; The waterproof layer (2) is placed on the inner side of the mixing pile (4); The precast concrete slab (3) is placed on the inner side of the waterproof layer (2).

2. The permanent- temporary combined pile- slab structure according to claim 1, characterized in that: The connector includes a connecting rod (6) and two nuts. The upper part of the steel section (5) is provided with a through hole. A connecting rod (6) is provided between multiple steel sections (5). The outer surfaces of the connecting rod (6) are provided with threaded structures for the nuts to be threaded. The connecting rod (6) passes through the perforations on the steel section (5) located on the same side in sequence.

3. The permanent- temporary combined pile- slab structure according to claim 2, characterized in that: The inner side of the steel section (5) is fixedly connected to the upper and lower ends of the connecting sleeve (7), and the end of the connecting sleeve (7) away from the steel section (5) passes through the inner side of the mixing pile (4). The waterproof layer (2) has a clearance opening corresponding to the connecting sleeve (7). The clearance opening is used for the connecting sleeve (7) to pass through. The connecting sleeve (7) has a threaded structure. The connecting disc (8) is threaded onto the connecting sleeve (7).

4. The permanent- temporary combined pile- slab structure according to claim 3, characterized in that: The precast concrete slab (3) is provided with a clearance groove for the connecting sleeve (7) to pass through; The end of the connecting sleeve (7) away from the steel section (5) extends through the inner side of the waterproof layer (2). The inner wall of the connecting sleeve (7) is provided with a threaded structure, and the connecting sleeve (7) is connected to the connecting screw (9) by the internal thread.

5. The permanent temporary combined pile-slab structure according to claim 4, characterized in that: The waterproof layer (2) includes a waterstop (10) and two waterproof fabric layers (11). The two waterproof fabric layers (11) are respectively fixedly connected to the inner and outer sides of the waterstop (10). The waterstop (10) has an avoidance opening.

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