Foundation pit deepening construction structure for elevator shaft transformation

Abstract

The utility model discloses an elevator shaft transformation foundation pit deepening construction structure which is characterized in that an original bottom plate is arranged at the bottom of an original elevator shaft, and the edge of the original bottom plate exceeds the edge of the original elevator shaft; a deepened space is excavated below the original bottom plate; the plane size of the deepened space is larger than that of an original elevator shaft, and a cushion layer is arranged at the bottom of the deepened space. An external expansion wall body is arranged in the deepened space and clings to the peripheral side surfaces of the deepened space; the external expansion wall body is correspondingly arranged at the bottom of the side wall of the original elevator shaft, and the top surface of the external expansion wall body is flush with the top surface of the original bottom plate; the inner side face of the external expansion wall body is vertically aligned with the inner side face of the original elevator shaft side wall, and the outer side face of the external expansion wall body exceeds the outer side face of the original elevator top side wall. A deepened space bottom plate is arranged in the external expansion wall body and located above the cushion layer. And the safety of the deepened part of the elevator shaft foundation pit is improved.

Description

Technical Field

[0001] The utility model belongs to the field of building construction, and particularly belongs to a construction structure for deepening the foundation pit of elevator shaft reconstruction. Background Technique

[0002] At present, the core areas of first- and second-tier cities are mainly focused on renovation and upgrading, and the construction of a large number of renovation projects has accelerated. Renovation projects have gradually become the key points of construction in first- and second-tier cities. Among them, the deepening of the elevator shaft foundation pit is the key and difficult point of the reinforcement project, and dangerous factors such as structural load, water blocking and water isolation measures, and confined space operation need to be comprehensively considered, requiring extremely high precision and accuracy. Therefore, choosing a reasonable method for deepening the construction of the elevator shaft plays a key role in ensuring safety, quality, and feasibility. Content of the Utility Model

[0003] The utility model provides a construction structure for deepening the foundation pit of elevator shaft reconstruction, aiming to improve the safety of the deepened part of the elevator shaft foundation pit.

[0004] To achieve the above purpose, the utility model provides a construction structure for deepening the foundation pit of elevator shaft reconstruction. There is an original bottom plate at the bottom of the original elevator shaft, and the edge of the original bottom plate extends beyond the edge of the original elevator shaft; a deepening space is excavated below the original bottom plate; the planar dimension of the deepening space is larger than that of the original elevator shaft, and a cushion layer is provided at the bottom of the deepening space; an outward-expanded wall is provided closely along the four surrounding sides of the deepening space; the outward-expanded wall is correspondingly arranged at the bottom of the side wall of the original elevator shaft, and the top surface of the outward-expanded wall is flush with the top surface of the original bottom plate; the inner side surface of the outward-expanded wall is vertically aligned with the inner side surface of the side wall of the original elevator shaft, and the outer side surface of the outward-expanded wall extends beyond the outer side surface of the side wall of the original elevator shaft top; the steel bars in the original elevator shaft extend beyond the side wall of the original elevator shaft, and the extended part extends into the outward-expanded wall; the end part of the steel bars in the original bottom plate close to the outward-expanded wall side correspondingly extends beyond the corresponding side surface of the original bottom plate, and the extended part extends into the outward-expanded wall; a deepening space bottom plate is provided in the outward-expanded wall above the cushion layer.

[0005] Furthermore, a baffle, a waterproof layer, and a mortar protective layer are sequentially arranged from outside to inside between the original bottom plate and the side plain soil below the original bottom plate; the lower end of the waterproof layer extends below the deepening space bottom plate.

[0006] Furthermore, the baffle is made of steel plate material, and the thickness of the steel plate is not less than 10 mm.

[0007] Furthermore, the corner between the baffle and the original bottom plate is sealed with sealant.

[0008] Furthermore, the bottom of the outward-expanded wall is provided with lapped steel bars; the deepening space bottom plate is connected to the outward-expanded wall through the lapped steel bars.

[0009] Furthermore, the extended wall is cast with high-strength super-fluid grouting material.

[0010] Furthermore, the thickness of the extended wall is not less than 500 mm.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The structure of this application is relatively simple, the time required to complete the whole structure is short, and the cost is low. Through the connection of the extended bars of the original floor slab and the original side wall of the elevator shaft with the extended wall, and by increasing the width of the extended wall, the supporting strength of the extended wall is improved, and the safety of the reconstructed structure is enhanced. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the present utility model.

[0013] Description of the Drawings: 1. Original elevator shaft; 2. Original floor slab; 3. Deepened space; 4. Extended wall; 7. Cushion; 8. Deepened space floor slab; 9. Baffle; 10. Waterproof layer; 11. Mortar protection layer; 12. Extended bars. Detailed Embodiments

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the specification. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0015] In the description of this patent, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this patent.

[0016] Combined with the attached drawings, a construction structure for deepening the foundation pit of an elevator shaft transformation. There is an original floor slab 2 at the bottom of the foundation pit of the elevator shaft 1, and the edge of the original floor slab 2 extends beyond the edge of the foundation pit; there is a deepening space 3 below the original floor slab 2; there is an outward-expanding wall 4 at the edge of the deepening space 3; the outward-expanding wall 4 is supported below the wall of the elevator shaft 1; the top surface of the outward-expanding wall 4 is flush with the top surface of the original floor slab 2; there is a first reserved steel bar 5 at the end of the wall of the elevator shaft 1; there is a second reserved steel bar 6 at the end of the original floor slab 2; the outward-expanding wall 4 is poured together with the first reserved steel bar 5 and the second reserved steel bar 6, and there is a cushion layer 7 at the bottom of the deepening space 3; the end of the cushion layer 7 extends to the bottom of the outward-expanding wall 4; there is a deepening space floor slab 8 above the cushion layer 7. There is a lapped steel bar 12 at the bottom of the outward-expanding wall 4; the deepening space floor slab 8 is connected to the outward-expanding wall 4 through the lapped steel bar 12. The connection strength between the outward-expanding wall and the deepening space floor slab is improved through the connection between the steel bars.

[0017] Between the original floor slab 2 below and between the outward-expanding wall 4 and the side plain soil, there are arranged a baffle 9, a waterproof layer 10, and a mortar protective layer 11 in sequence from outside to inside; the lower end of the waterproof layer 10 extends below the deepening space floor slab 8.

[0018] The baffle 9 is made of steel plate material, and the thickness of the baffle 9 is not less than 10 mm. The upper end of the baffle 9 is in contact with the bottom surface of the original floor slab 2, and the corner between the baffle 9 and the original floor slab 2 is sealed with sealant.

[0019] The outward-expanding wall 4 is poured with high-strength super-fluid grouting material, and the high-strength super-fluid grouting material is a grouting material with a strength grade one higher than that of the concrete of the original elevator shaft.

[0020] The thickness of the outward-expanding wall 4 is not less than 500 mm.

[0021] During construction, manual chiseling is adopted to remove the original structural floor slab and the original soil to the design elevation. The shaft wall is divided into four modules, and each template includes half of the structure between the adjacent side walls to be constructed; each module is constructed in sequence; when first constructing the 1 / 4 module of the shaft, first use a 10-mm-thick steel plate as the base for waterproofing and protective layer construction, then pour the outward-expanding wall 4 with high-strength super-fluid grouting material, and leave lapped steel bars 12 connected to the deepening space floor slab 8 in the outward-expanding wall 4; construct each module in sequence clockwise. After all the outward-expanding walls are constructed, pour the deepening space floor slab 8. During construction, at least three-quarters of the module structure supports the original elevator shaft in the deepening space; this construction structure is simple in operation, low in cost, and short in construction time.

[0022] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model, and any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A construction structure for deepening the foundation pit of elevator shaft renovation. There is an original bottom plate (2) at the bottom of the original elevator shaft (1), and the edge of the original bottom plate (2) extends beyond the edge of the original elevator shaft (1); It is characterized in that: A deepening space (3) is excavated below the original floor slab (2); the planar dimension of the deepening space (3) is larger than that of the original elevator shaft (1), and a cushion layer (7) is provided at the bottom of the deepening space (3); an outward-expanded wall (4) is provided along the four side surfaces of the deepening space (3) closely in the deepening space (3); the outward-expanded wall (4) is correspondingly arranged at the bottom of the side wall of the original elevator shaft (1), and the top surface of the outward-expanded wall (4) is flush with the top surface of the original floor slab (2); the inner side surface of the outward-expanded wall (4) is vertically aligned with the inner side surface of the side wall of the original elevator shaft (1), and the outer side surface of the outward-expanded wall (4) extends beyond the outer side surface of the side wall of the original elevator top; the steel bars in the original elevator shaft (1) extend beyond the side wall of the original elevator shaft (1), and the extended part extends into the outward-expanded wall (4); the end part of the steel bars in the original floor slab (2) on the side close to the outward-expanded wall (4) correspondingly extends beyond the corresponding side surface of the original floor slab (2), and the extended part extends into the outward-expanded wall (4); a deepening space floor slab (8) is provided above the cushion layer (7) in the outward-expanded wall (4).

2. The construction structure for deepening the foundation pit of the elevator shaft renovation according to claim 1, characterized in that: A baffle (9), a waterproof layer (10), and a mortar protective layer (11) are sequentially arranged from outside to inside between the original floor slab (2) and the side plain soil below the outward-expanded wall (4); the lower end of the waterproof layer (10) extends below the deepening space floor slab (8).

3. The construction structure for deepening the foundation pit of the elevator shaft renovation according to claim 2, characterized in that: The baffle (9) is made of steel plate material, and the thickness of the steel plate is not less than 10 mm.

4. The construction structure for deepening the foundation pit of the elevator shaft renovation according to claim 2, characterized in that: The corner between the baffle (9) and the original floor slab (2) is sealed with sealant.

5. The construction structure for deepening the foundation pit of the elevator shaft renovation according to claim 1, characterized in that: Spliced reinforcement bars (12) are provided at the bottom of the outward-expanded wall (4); the deepening space floor slab (8) is connected to the outward-expanded wall (4) through the spliced reinforcement bars (12).

6. The construction structure for deepening the foundation pit of the elevator shaft renovation according to claim 1, characterized in that: The outward-expanded wall (4) is cast with high-strength super-fluid grouting material.

7. The construction structure for deepening the foundation pit of the elevator shaft renovation according to claim 1, characterized in that: The thickness of the outward-expanded wall (4) is not less than 500 mm.

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