Foundation pit supporting device

Abstract

The utility model discloses a foundation pit supporting device which comprises a hydraulic cylinder and an installation support, and the installation support is located between an enclosing purlin base portion and a continuous wall enclosing purlin and located between two adjacent enclosing purlin protruding portions. The mounting bracket comprises a fixed frame and a movable frame, one end of the fixed frame is lapped on the top surface of the enclosing purlin base part and is fixedly connected with the enclosing purlin base part, a slot is formed in the side surface of the other end of the fixed frame, one end of the movable frame is inserted into the slot and is in sliding connection with the slot, and the other end of the movable frame is lapped on the top surface of the continuous wall enclosing purlin; the movable end of the hydraulic cylinder abuts against the inner side face of the movable frame. The device has the advantages that the device is simple in structure and firm in installation, the movable frame can move along with deformation of the continuous wall enclosing purlin and can also move along with pushing of the hydraulic cylinder, the movable frame provides part of supporting force for the hydraulic cylinder, meanwhile, the force application area of the hydraulic cylinder on the continuous wall enclosing purlin is increased, and the service life of the continuous wall enclosing purlin is prolonged. And the continuous wall enclosing purlin is prevented from being damaged due to too small stress area.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to a foundation pit support device. Background Art

[0002] With the rapid expansion of urban underground space development, the construction of large-scale urban underground projects continues to advance, and the number of projects near important transportation facilities and protective buildings continues to grow. The requirements for controlling environmental disturbances such as deformation of retaining structures during foundation pit construction are becoming increasingly high. Concrete support is commonly used in foundation pits in soft soil areas, which has the characteristics of high structural rigidity, high bearing capacity and flexible layout.

[0003] However, concrete support is a passive stress form, and the creep and temperature shrinkage effects of ultra-long distance concrete support are significant, which will increase the deformation of the foundation pit retaining structure and thus fail to meet the requirements of surrounding environmental protection. Utility Model Content

[0004] In order to overcome the problem of deformation of the foundation pit retaining structure in the prior art, which can no longer meet the requirements of surrounding environmental protection, and thus reduce the effect of the automatic servo compensation device on limiting the deformation of the foundation pit retaining structure, the embodiment of the utility model provides a foundation pit support device. The technical solution is as follows:

[0005] A foundation pit support device comprises a hydraulic cylinder and a mounting bracket for fixing the hydraulic cylinder, wherein the mounting bracket is located between a purlin base and a continuous wall purlin, and between two adjacent convex portions of the purlin; the mounting bracket is in the shape of an inverted "J", and comprises a fixed bracket and a movable bracket, wherein one end of the fixed bracket is placed on the top surface of the purlin base and is fixedly connected thereto, and a slot is provided on the side surface of the other end of the fixed bracket, one end of the movable bracket is inserted into the slot and is slidably connected thereto, and the other end of the movable bracket is placed on the top surface of the continuous wall purlin, the fixed end of the hydraulic cylinder is fixed to the fixed bracket by bolts, and the movable end of the hydraulic cylinder is horizontally abutted against the inner side surface of the movable bracket.

[0006] Furthermore, it also includes a plurality of embedded steel bars horizontally embedded in the base of the purlin, and a pressure plate is vertically arranged on the outer end of the embedded steel bars. The side surface of one end of the fixing frame is bolted to the outer side surface of the pressure plate. The pressure plate prevents the hydraulic cylinder from being directly connected to the base of the purlin, which would make the force-bearing area too small, the stress too concentrated, and the pressure too high, thereby causing the purlin to be squeezed, bulged or broken.

[0007] Furthermore, reinforcing plates are symmetrically arranged on both sides of one end of the fixing frame, and the reinforcing plates effectively enhance the pressure bearing capacity of the fixing frame to avoid deformation and bending.

[0008] Furthermore, a support plate is pre-cast between the protruding parts of two adjacent purlins, and the fixing frame is located on the top surface of the support plate. The support plate and the supporting purlin are used together to build a steel cage, and then cast together to obtain an integrated structure, which effectively improves the combination ability of the two and increases the supporting effect.

[0009] Furthermore, the pressure plate and the embedded steel bars are detachably connected, which facilitates the later disassembly of the pressure plate and the hydraulic cylinder.

[0010] The beneficial effects of the technical solution provided by the embodiment of the utility model are as follows: the device has a simple structure and is firmly installed, wherein the movable frame can not only move with the deformation of the continuous wall purlin, but also move with the push of the hydraulic cylinder, and the movable frame not only provides partial support force for the hydraulic cylinder but also increases the force application area of ​​the hydraulic cylinder on the continuous wall purlin, thereby avoiding damage to the continuous wall purlin due to too small a force area. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings used in the embodiments. Obviously, the drawings listed below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0013] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0014] Figure 3 It is a cross-sectional schematic diagram of an embodiment of the utility model;

[0015] Figure 4 It is an exploded schematic diagram of the mounting bracket in the embodiment of the utility model.

[0016] In the attached drawings, the components represented by each reference numeral are listed as follows: 1. Hydraulic cylinder; 201. Fixed frame; 2011. Socket; 202. Movable frame; 3. Embedded steel bars; 4. Pressure plate; 5. Reinforcement plate; 6. Support plate; 7. Shell; 10. Support purlin; 1001. Purlin base; 1002. Purlin convex part; 11. Continuous wall purlin. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] See also Figures 1 to 4, an embodiment of the present utility model provides a foundation pit support device, which includes a hydraulic cylinder 1 and a mounting bracket for fixing the hydraulic cylinder 1. The mounting bracket is located between the base 1001 of the collar beam and the diaphragm wall collar beam 11, and is located between two adjacent collar beam convex parts 1002; the mounting bracket is in an inverted "U" shape, and the mounting bracket includes a fixed frame 201 and a movable frame 202. One end of the fixed frame 201 is placed on the top surface of the base 1001 of the collar beam and is fixedly connected thereto. A slot 2011 is provided on the side surface of the other end of the fixed frame 201. One end of the movable frame 202 is inserted into the slot 2011 and is slidably connected thereto. The other end of the movable frame 202 is placed on the top surface of the diaphragm wall collar beam 11. The fixed end of the hydraulic cylinder 1 is fixed to the fixed frame 201 by bolts, and the movable end of the hydraulic cylinder 1 horizontally abuts against the inner side surface of the movable frame 202.

[0019] The device further includes a plurality of embedded steel bars 3 horizontally embedded in the base 1001 of the collar beam. A bearing plate 4 is vertically provided on the outer side end of the embedded steel bar 3. One side surface of one end of the fixed frame 201 is bolted to the outer side surface of the bearing plate 4.

[0020] Among them, reinforcing plates 5 are symmetrically arranged on both sides of one end of the fixed frame 201.

[0021] A support plate 6 is pre-cast between two adjacent collar beam convex parts 1002. The fixed frame 201 is located on the top surface of the support plate 6. The support plate and the support collar beam are used to build the steel reinforcement cage together and then poured together to obtain an integrally formed structure, effectively improving the bonding ability between the two and increasing the support effect.

[0022] Moreover, the bearing plate 4 is detachably connected to the embedded steel bar 3, which is convenient for removing the bearing plate when the hydraulic cylinder is removed later.

[0023] Usage method: When building the steel reinforcement cage of the support collar beam 10, the embedded steel bars 3 and the steel bars in the support plate 6 are built together and poured into a formed structure. When using this device, first fixedly install the bearing plate 4 onto the embedded steel bar 3, then place the mounting bracket onto the support plate 6. One end of the movable frame 202 faces the diaphragm wall collar beam 11 and is placed on its top surface. One end of the fixed frame 201 faces the support collar beam 10 and is placed on its top surface. Then bolt the side of the fixed frame 201 close to the bearing plate 4 to the bearing plate 4. Then hoist and install the hydraulic cylinder 1 and its housing 7 in place, and then bolt the housing 7 to the fixed frame 201. Then start the hydraulic cylinder 1 so that its movable end horizontally abuts against the side surface of the movable frame 202;

[0024] Among them, the hydraulic cylinder 1 is provided with a control system. The hydraulic cylinder 1 is electrically connected to the control system and is prior art, so it will not be elaborated here.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A foundation pit support device, characterized in that: It comprises a hydraulic cylinder (1) and a mounting bracket for fixing the hydraulic cylinder (1), wherein the mounting bracket is located between a purlin base (1001) and a continuous wall purlin (11), and between two adjacent purlin convex parts (1002); The mounting bracket is in the shape of an inverted "J", and comprises a fixed bracket (201) and a movable bracket (202); one end of the fixed bracket (201) is placed on the top surface of the purlin base (1001) and is fixedly connected thereto; a slot (2011) is provided on the side surface of the other end of the fixed bracket (201); one end of the movable bracket (202) is inserted into the slot (2011) and is slidably connected thereto; the other end of the movable bracket (202) is placed on the top surface of the continuous wall purlin (11); the fixed end of the hydraulic cylinder (1) is fixed to the fixed bracket (201) by bolts; and the movable end of the hydraulic cylinder (1) is horizontally abutted against the inner side surface of the movable bracket (202).

2. The foundation pit support device according to claim 1, characterized in that: It also comprises a plurality of embedded steel bars (3) embedded horizontally in the base (1001) of the purlin, a pressure plate (4) being vertically arranged at the outer end of the embedded steel bars (3), and a side surface of one end of the fixing frame (201) being bolted to the outer side surface of the pressure plate (4).

3. The foundation pit support device according to claim 2, characterized in that: Reinforcement plates (5) are symmetrically arranged on both sides of one end of the fixing frame (201).

4. The foundation pit support device according to claim 3, characterized in that: A support plate (6) is precast between two adjacent purlin convex parts (1002), and the fixing frame (201) is located on the top surface of the support plate (6).

5. The foundation pit supporting device according to claim 4, characterized in that: The pressure bearing plate (4) is detachably connected to the embedded steel bars (3).

Images