Quick support changing structure for side wall of deep foundation pit floor

Abstract

The utility model discloses a deep foundation pit floor side wall quick support changing structure which comprises an outer side wall, an upper concrete support is arranged at the top of the outer side wall, a structure bottom plate is arranged at the bottom of the outer side wall, an outer wall waterproof roll is arranged on one side of the outer side wall, and a lower concrete support is arranged on the other side of the outer side wall. The structure comprises an outer wall waterproof coiled material, a fat groove concrete backfill is arranged on one side of the outer wall waterproof coiled material, an enclosure row pile is arranged on one side of the fat groove concrete backfill, and a waterproof curtain is arranged on one side of the enclosure row pile. When the height difference between a lower floor slab and an upper concrete support is large and complete closing construction of an upper floor slab cannot be met, a rapid support changing system is formed by firstly constructing local side walls, additionally arranging inclined steel support changing and backfilling an external fat groove, and the effects that the upper support is firstly dismantled to accelerate structural construction, and meanwhile deformation stability of a foundation pit support structure is guaranteed are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to building construction technical direction, concretely relates to a deep foundation pit floor side wall quick support replacement structure. BACKGROUND

[0002] In the construction of deep foundation pit near subway tunnel, the deformation control is strictly affected, the deformation control requirement of foundation pit construction is very strict, and the deformation of foundation pit often occurs in the stages of foundation pit earthwork excavation, support erection and floor construction support removal and support replacement. In the traditional support replacement construction process, the lower floor concrete slab surface is connected with the enclosure structure by adding a concrete slab belt before the upper support is removed, the upper support is removed after achieving the floor support replacement effect, and the support replacement belt part needs to be removed when the subsequent fat groove is backfilled. The quality of the waterproof construction of the outer wall is directly affected by the removal of the surface treatment, and the removal of the waste slag affects the quality of the fat groove backfilling. UTILITARY MODEL

[0003] The utility model aims at the prior art deep foundation pit floor side wall quick support replacement structure to solve the problems in the background art.

[0004] In order to solve the above technical problems, the utility model provides the following technical scheme: a deep foundation pit floor side wall quick support replacement structure, which comprises an outer side wall, the top of the outer side wall is provided with an upper concrete support, the bottom of the outer side wall is provided with a structural bottom plate, one side of the outer side wall is provided with an outer wall waterproof roll material, one side of the outer wall waterproof roll material is provided with a fat groove concrete backfilling, one side of the fat groove concrete backfilling is provided with a retaining row pile, one side of the retaining row pile is provided with a water stopping curtain, the other side of the outer side wall is provided with a removed support beam, the other side of the outer side wall is provided with a concrete floor above the removed support beam, the outer wall of the outer side wall is embedded with a side wall embedded plate, the outer wall of the concrete floor is embedded with a floor embedded plate, and a profile steel inclined support is arranged between the side wall embedded plate and the floor embedded plate.

[0005] Preferably, the outer wall of the outer side wall is provided with a 20cm construction joint, and the construction joint is matched with the concrete floor.

[0006] Preferably, the distance between the outer side wall and the floor embedded plate is 3000mm.

[0007] Compared with the prior art, the utility model has the advantages that,

[0008] (1) The main purpose is to aim at the deep foundation pit engineering close to the subway tunnel, in the case that there is a fat groove outside the foundation pit, the lower floor and the upper concrete support have large height difference and cannot meet the complete closure construction of the upper floor, through the construction of the local side wall in advance, the addition of the inclined steel bracing and the backfill of the external fat groove, a rapid bracing system is formed, the upper support is removed in advance to speed up the structure construction and ensure the deformation stability of the foundation pit enclosure structure;

[0009] (2) The steel bracing is a reusable assembly type turnover material, which is simple to operate and easy to realize;

[0010] (3) The temporary inclined bracing system is adopted, the external fat groove is backfilled in advance, and the deformation stability of the foundation pit can be ensured;

[0011] (4) In the case that there is a fat groove outside the external side wall, the external backfill of the bracing system adopts concrete backfill, so that the internal force borne by the structure side wall bracing is reduced, and the force transmission path is transferred to the enclosure structure. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification, and are used together with embodiments of the present utility model to explain the present utility model, and do not constitute a limitation on the present utility model. In the drawings:

[0013] Figure 1 It is the overall structure schematic view of the present utility model;

[0014] Figure 2 It is the side wall embedded plate pre-buried node schematic view of the present utility model;

[0015] Figure 3 It is the floor embedded plate pre-buried node schematic view of the present utility model;

[0016] Figure 4 It is the side wall embedded plate and steel inclined bracing connection schematic view of the present utility model;

[0017] Figure 5 It is the floor embedded plate and shear plate connection schematic view of the present utility model;

[0018] Figure 6 It is the floor embedded plate and steel inclined bracing connection schematic view of the present utility model.

[0019] In the drawing: 001, water stop curtain; 002, enclosure pile row; 003, fat groove concrete backfill; 004, external wall waterproof roll material; 005, upper concrete support; 006, side wall embedded plate; 007, external side wall; 008, steel inclined bracing; 009, floor embedded plate; 010, concrete floor; 011, removed support beam; 012, structure bottom plate; 013, shear plate. DETAILED DESCRIPTION

[0020] The technical solutions of the utility model will be further described in detail below in combination with the preferred embodiments and the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Please refer to Figures 1-6 The utility model provides technical scheme: a kind of deep foundation pit floor side wall quick support replacement structure, the top of outer side wall 007 is provided with upper concrete support 005, the bottom of outer side wall 007 is provided with structural bottom plate 012, one side of outer side wall 007 is provided with outer wall waterproofing membrane 004, one side of outer wall waterproofing membrane 004 is provided with fat groove concrete backfill 003, one side of fat groove concrete backfill 003 is provided with enclosure row pile 002, one side of enclosure row pile 002 is provided with water stop curtain 001, another side of outer side wall 007 is provided with removed support beam 011, another side of outer side wall 007 is provided with concrete floor 010 near the top of removed support beam 011, the outer wall of outer side wall 007 is embedded with side wall embedded plate 006, the outer wall of concrete floor 010 is embedded with floor embedded plate 009, type steel inclined brace 008 is arranged between side wall embedded plate 006 and floor embedded plate 009, it needs to be explained that, the size of type steel inclined brace 008 can be adjusted model size and shape according to actual stress analysis of foundation pit.

[0022] Further, the outer wall of outer side wall 007 is provided with 20cm construction joint, and the construction joint is matched with concrete floor 010, which facilitates the installation of concrete floor 010.

[0023] Further, the distance between outer side wall 007 and floor embedded plate 009 is 3000mm, which facilitates the support of floor embedded plate 009.

[0024] In use, first, after the construction of the structure bottom plate 012 is completed, the removed support beam 011 on the upper part of the structure bottom plate 012 is removed, then a 20cm construction joint is opened on the outer wall of the outer side wall 007, and the concrete floor slab 010 is installed through the construction joint, then the floor slab embedded plate 009 is arranged at the position of 3000mm of the outer side wall 007 of the concrete floor slab 010, then the outer wall waterproof coiled material 004 is constructed after the outer side wall 007 is reinforced, then the fat groove concrete backfill 003 is constructed outside the outer side wall 007, and the fat groove concrete backfill 003 is made to be the same height as the concrete floor slab 010, then the reinforced concrete of the outer side wall 007 is reinforced by 2000mm, and the side wall embedded plate 006 is arranged at the elevation of 1500mm, then the type steel inclined brace 008 is welded between the side wall embedded plate 006 and the floor slab embedded plate 009, in the technical scheme, the type of the type steel inclined brace 008 is H500*300*13*18, then the water-facing surface waterproof and the fat groove concrete backfill 003 are constructed to the height of 1800mm after the outer side wall 007 is reinforced, finally, the upper concrete support 005 is removed, and the upper floor slab reinforced concrete structure is continuously constructed, thereby completing a series of deep foundation pit floor slab side wall rapid support changing structure work, through the construction of the local side wall in advance, the addition of the inclined steel support changing and the external fat groove backfill, the rapid support changing system is formed, so that the upper support is removed in advance to speed up the construction of the structure, and the deformation stability of the foundation pit enclosure structure is ensured.

[0025] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0026] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A deep foundation pit floor side wall rapid bracing structure, comprising an outer side wall (007), characterized in that: The top of the outer side wall (007) is provided with an upper concrete support (005), the bottom of the outer side wall (007) is provided with a structural bottom plate (012), one side of the outer side wall (007) is provided with an outer wall waterproof coiled material (004), one side of the outer wall waterproof coiled material (004) is provided with a ridge concrete backfill (003), one side of the ridge concrete backfill (003) is provided with a surrounding row pile (002), one side of the surrounding row pile (002) is provided with a water stop curtain (001), the other side of the outer side wall (007) is provided with a removed support beam (011), the other side of the outer side wall (007) is provided with a concrete floor (010) near the upper part of the removed support beam (011), the outer wall of the outer side wall (007) is pre-buried with a side wall embedded plate (006), the outer wall of the concrete floor (010) is pre-buried with a floor embedded plate (009), and a profile steel inclined brace (008) is arranged between the side wall embedded plate (006) and the floor embedded plate (009).

2. The rapid bracing structure for deep foundation pit floor side wall according to claim 1, characterized in that: The outer wall of the outer side wall (007) is provided with a construction joint of 20 cm, and the construction joint is matched with the concrete floor (010).

3. The rapid bracing structure for deep foundation pit floor side wall according to claim 1, characterized in that: The distance between the outer side wall (007) and the floor embedded plate (009) is 3000 mm.

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