Foundation pit bottom plate support changing device

Abstract

The utility model discloses a foundation pit bottom plate support changing device which comprises a foundation pit bottom plate and a base, a jack is fixedly connected to the upper surface of the base, splicing supporting pieces are fixedly connected to the surface of the upper end of a hydraulic rod of the jack, and the splicing supporting pieces are stacked and mutually installed and fixed. The splicing supporting pieces are mutually installed and fixed through bolts and nuts, the splicing supporting pieces are adopted for splicing and height extending supporting, according to the fact that the height of the splicing supporting pieces is increased or decreased, a jack is arranged at the bottom of the splicing supporting pieces to conduct lifting and squeezing on the back shore, the position height of the back shore can be flexibly adjusted, and a movable supporting roller is arranged on a base. The device can roll and move automatically, is convenient and flexible to move and is convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of foundation pit bottom plate support replacement device, more specifically, to a foundation pit bottom plate support replacement device. BACKGROUND

[0002] With the acceleration of urbanization construction speed in China, land resource demand is increasingly nervous, in order to make full use of land use area, building to the underground depth development, thereby into deep foundation pit operation construction. Deep foundation pit construction process needs to speed up the construction progress of deep foundation pit, reduces the foundation pit risk, the construction progress of deep foundation pit is slow, and the risk of foundation pit is high.

[0003] The support replacement in the foundation pit engineering is to replace the internal support structure system playing a temporary support role gradually under certain conditions by taking certain technical measures, so that the engineering construction can continue to be carried out safely and smoothly after the temporary internal support is removed, and the essence is the safe and orderly adjustment, transfer and redistribution of stress. The support and support structure system of the foundation pit usually adopts the support and support structure system composed of water stop curtain + bored pile + concrete horizontal support. In the support replacement construction process in the above support and support structure system, after the foundation pit slotting is completed, in order to prevent the rebound of the deep foundation pit soil after excavation and reduce the rebound deformation of the foundation pit, the effective measure is to reduce the change of effective stress in the soil and reduce the exposure time. Therefore, after the foundation pit bottom is excavated to the design foundation pit bottom elevation, the cushion and foundation bottom plate are poured as soon as possible, and the support replacement construction is carried out after the pouring of the foundation bottom plate, and in this construction process, the construction sequence and progress of the support replacement determine the starting time of the upper horizontal support removal and column wall beam plate construction. The support replacement plate belt is uniformly reinforced, and the thickness is the same as that of the raft plate, so that the cantilever height of the enclosure pile is large, and the stiffness and shear bearing capacity of the enclosure pile in the foundation pit support enclosure structure are much larger than those of the water stop enclosure structure arranged between the enclosure piles, so that the support replacement plate belt is easy to cause the damage of the water stop enclosure structure due to the excessive load transmission to the water stop enclosure structure, and the safety of the foundation pit is threatened. At the same time, the saturation water content in the silt geology is large, and it is difficult to form the cushion directly. It can be seen that the construction sequence, progress and structure form of the support replacement play an important role in shortening the foundation construction progress and reducing the foundation pit risk, and the cushion construction under the silt geological condition also plays an important role in speeding up the engineering progress. In the foundation pit construction condition, the support replacement stage is extremely dangerous and important, and it is of great significance to study an effective foundation pit support system support replacement construction method, control the foundation pit deformation and ensure the safe construction of the foundation pit.

[0004] In the prior art, the patent with the authorization announcement number CN115288157A proposes a foundation pit bottom plate support changing device and method, which comprises a foundation pit bottom plate, a vertical support, an inclined support, a fixed base and a sliding guide rail. The sliding guide rail is horizontally laid, the fixed base is provided with a track groove at the center of the bottom surface and is configured with the sliding guide rail. The vertical support is vertically fixed on the fixed base. The foundation pit bottom plate is laid flat on the top of the vertical support and is connected through the inclined support. The two ends of the inclined support are connected with the vertical support and the foundation pit bottom plate respectively. The present application controls the deformation of the foundation pit, speeds up the construction progress and reduces the risk of the foundation pit.

[0005] In the above-mentioned patent, the sliding guide rail is used for sliding guide and support assembly. In actual use, it needs to be supported by multiple points. The guide rail is not convenient to use, and the overall movement is not convenient. The length of the vertical support is fixed, and the support is not convenient at different heights and cannot be adjusted, and the use flexibility is not good. Practical new type content

[0006] In view of the problems existing in the prior art, the purpose of the present application is to provide a foundation pit bottom plate support changing device, which is extended in height by splicing support pieces. According to the height increase or decrease of the splicing support pieces, the position height of the support can be flexibly adjusted. The bottom of the base is provided with a jack lifting and extruding support, which can be moved conveniently and flexibly. The use is convenient.

[0007] In order to solve the above problems, the present application adopts the following technical scheme.

[0008] A foundation pit bottom plate support changing device comprises a foundation pit bottom plate and a base. The upper surface of the base is fixedly connected with a jack. The upper end surface of the hydraulic rod of the jack is fixedly connected with a splicing support piece. The splicing support pieces are stacked and fixedly installed. The splicing support pieces are fixedly installed by bolts and nuts. The height support is extended by splicing support pieces. According to the height increase or decrease of the splicing support pieces, the position height of the support can be flexibly adjusted. The bottom of the base is provided with a jack lifting and extruding support, which can be moved conveniently and flexibly. The use is convenient.

[0009] Further, the surface of the base is provided with a moving support roller. The moving support rollers are distributed and arranged on the inner end surfaces of the left and right sides of the base.

[0010] Further, the left and right surfaces of the base are provided with a strip-shaped opening. The inner side of the strip-shaped opening is provided with a moving support roller. The moving support roller protrudes from the outer end of the base.

[0011] Further, the splicing support piece comprises a first circular bottom plate, a circular tube and a second circular bottom plate. The surface of the first circular bottom plate is welded and fixed with the circular tube. The surface of the circular tube is welded and fixed with the second circular bottom plate.

[0012] Further, the outer end surface of the first and second circular bottom plates is provided with mounting holes, and the mounting holes are distributed in four groups on the surface of the first and second circular bottom plates.

[0013] Further, a threaded top pin is mounted on the inner end surface of one side of the base, and the threaded column of the threaded top pin is extruded on the outer surface of the moving support roller.

[0014] Further, a threaded hole is provided on the surface of one side of the base, and the outer surface of the threaded top pin is connected to the inner surface of the threaded hole.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] (1) The height support is extended by assembling the splicing support, the splicing support is spliced according to the increase or decrease of height, the bottom is provided with a jack lifting extrusion support, the position height of the support can be flexibly adjusted, the base is provided with a moving support roller, and the moving support roller can be automatically rolled and moved, so that the movement is convenient and flexible, and the utility model is convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure and foundation pit bottom plate support schematic diagram of the utility model;

[0018] Figure 2 It is a base and splicing support first schematic diagram of the utility model;

[0019] Figure 3 It is a base and splicing support second schematic diagram of the utility model;

[0020] Figure 4 It is a base and splicing support third schematic diagram of the utility model;

[0021] Figure 5 It is a splicing support local structure section schematic diagram of the utility model.

[0022] Explanation of reference numerals in the drawing:

[0023] 1 foundation pit bottom plate, 2 base, 3 jack, 4 splicing support, 5 bolt, 6 nut, 7 moving support roller, 8 strip-shaped opening, 40 first circular bottom plate, 41 circular tube, 42 second circular bottom plate, 9 threaded top pin. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0025] Embodiment 1

[0026] Please refer to Figures 1-5 A foundation pit bottom plate support changing device, including foundation pit bottom plate 1, base 2, the upper surface of base 2 is fixedly connected with jack 3, the upper end surface of the hydraulic rod of jack 3 is fixedly connected with splicing support piece 4, splicing support piece 4 is fixedly installed by stacking each other, splicing support piece 4 is fixedly installed by bolt 5 and nut 6, the height support is extended by splicing support piece, the position height of the support can be flexibly adjusted according to the splicing support piece with height increasing or decreasing, the bottom of the base is provided with jack lifting extrusion support, the position height of the support can be flexibly adjusted, the base is provided with movable support roller, and the movable support roller can move by itself, so that the base is conveniently and flexibly moved;

[0027] The surface of base 2 is provided with movable support roller 7, movable support roller 7 is distributed on the inner end surface of the left and right sides of base 2, movable support roller 7 is distributed on the left and right sides, so that the base 2 can be moved while being stably supported on the ground, the roller structure has a large area, and the ground support area is large, so that the base is stably supported on the ground;

[0028] The left and right side surfaces of base 2 are provided with strip-shaped openings 8, the inner side of strip-shaped opening 8 is provided with movable support roller 7, movable support roller 7 protrudes from the outer end of base 2, and can be supported at the lower end of base 2, so that the ground can be supported and rolled;

[0029] Splicing support piece 4 includes first circular bottom plate 40, circular tube 41 and second circular bottom plate 42, circular tube 41 is welded and fixed on the surface of first circular bottom plate 40, and second circular bottom plate 42 is welded and fixed on the surface of circular tube 41, the welding is firm, and splicing support piece 4 can be installed and increased in height, so that the use is convenient;

[0030] The outer end surfaces of first circular bottom plate 40 and second circular bottom plate 42 are provided with mounting holes, four groups of mounting holes are distributed on the surfaces of first circular bottom plate 40 and second circular bottom plate 42, four groups of bolt 5 and nut 6 can be installed and stacked splicing support piece 4, and the installation is firm and stable;

[0031] The inner end surface of one side of the base 2 is provided with a threaded top screw 9, and the threaded column of the threaded top screw 9 is extruded on the outer surface of the movable supporting roller 7. In use, the threaded top screw 9 can be extruded on the outer end of the movable supporting roller 7, and the movable supporting roller 7 can be positioned and fixed during supporting, so that the movable supporting roller 7 is prevented from rotating.

[0032] The surface of one side of the base 2 is provided with a threaded hole, and the outer surface of the threaded top screw 9 is connected to the inner surface of the threaded hole. The threaded top screw 9 is convenient to install.

[0033] In use, the base 2 is fixedly connected with a jack 3 through the upper surface, the upper end surface of the hydraulic rod of the jack 3 is fixedly connected with a spliced supporting piece 4, the spliced supporting pieces 4 are fixedly stacked and installed, and the spliced supporting pieces 4 are fixedly installed through the bolts 5 and the nuts 6. In use, the number of the spliced supporting pieces 4 is adjusted through the different heights, the spliced supporting pieces 4 are locked and installed through the bolts 5 and the nuts 6, the base 2 is moved on the inner end of the foundation pit bottom plate 1, the threaded top screw 9 can be extruded on the outer end of the movable supporting roller 7, the movable supporting roller 7 can be positioned and fixed during supporting, and the movable supporting roller 7 is prevented from rotating. At this time, the control handle of the jack 3 is pressed down, the jack 3 is jacked up, the spliced supporting piece 4 is jacked up, and the spliced supporting piece 4 is extruded on the lower surface of the foundation pit bottom plate 1 to support and extrude (the jack refers to a small lifting device in which a rigid jacking piece is used as a working device, and a small stroke inside the jacking piece is used to open the heavy object through a top support or a bottom support jaw. The jack is mainly used for factories, mines, transportation and other departments as vehicle repair and other lifting, supporting and other work. The jack is light, compact, flexible, reliable, and can be carried and operated by one person. The jack is convenient to use, and the prior art is used), the jacking and supporting can adjust the height, and when a plurality of supports are used, the support is flexible and convenient.

[0034] The surface of the base 2 is provided with the movable supporting roller 7, and the movable supporting rollers 7 are distributed on the inner end surfaces of the left and right sides of the base 2. The movable supporting rollers 7 are distributed on the left and right sides, can stably support the ground, and can move the base 2. The roller structure has a large area and a large supporting area on the ground, and is stable when supporting the ground.

[0035] The above merely describes a preferred specific implementation of the present application. The protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical scheme and the improved concept of the present application within the technical range disclosed by the present application, and all of these should be covered within the protection scope of the present application.

Claims

1. A foundation pit bottom plate bracing device, comprising a foundation pit bottom plate (1) and a base (2), characterized in that: The upper surface of the base (2) is fixedly connected with a jack (3), the upper end surface of the hydraulic rod of the jack (3) is fixedly connected with a spliced support (4), the spliced supports (4) are fixedly installed in stacks, and the spliced supports (4) are fixedly installed in stacks through bolts (5) and nuts (6).

2. The device for replacing support of a foundation bottom plate according to claim 1, wherein: The surface of the base (2) is provided with a moving support roller (7), and the moving support rollers (7) are distributed on the inner end surfaces of the left and right sides of the base (2).

3. The device according to claim 2, wherein: The left and right side surfaces of the base (2) are provided with strip-shaped openings (8), the inner sides of the strip-shaped openings (8) are provided with moving support rollers (7), and the moving support rollers (7) protrude out of the base (2).

4. The device according to claim 1, wherein: The spliced support (4) comprises a first circular bottom plate (40), a circular tube (41) and a second circular bottom plate (42), the surface of the first circular bottom plate (40) is welded with the circular tube (41), and the surface of the circular tube (41) is welded with the second circular bottom plate (42).

5. The device according to claim 4, wherein: The outer end surfaces of the first circular bottom plate (40) and the second circular bottom plate (42) are provided with mounting holes, and the mounting holes are distributed in four groups on the surfaces of the first circular bottom plate (40) and the second circular bottom plate (42).

6. The strutting device of claim 1, wherein: The inner end surface of one side of the base (2) is provided with a threaded jackscrew (9), and the threaded column of the threaded jackscrew (9) is extruded on the outer surface of the moving support roller (7).

7. The device according to claim 6, wherein: The surface of one side of the base (2) is provided with a threaded hole, and the outer surface of the threaded jackscrew (9) is connected to the inner side surface of the threaded hole.

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