Self-adaptive supporting structure for foundation pit support

Abstract

The utility model discloses a foundation pit supporting self-adaptive supporting structure, which relates to the field of foundation pit supporting, and adopts the technical scheme that the foundation pit supporting self-adaptive supporting structure comprises an enclosing purlin assembly, the enclosing purlin assembly comprises a ground wall enclosing purlin and a supporting enclosing purlin, the supporting enclosing purlin comprises an enclosing purlin main piece and an enclosing purlin connecting piece, and the ground wall enclosing purlin and the enclosing purlin main piece are oppositely arranged at an interval to form a foundation pit; the enclosing purlin connecting piece is arranged in the foundation pit, the enclosing purlin connecting piece is connected with the enclosing purlin main piece, and a pouring gap is reserved between the enclosing purlin connecting piece and the ground wall enclosing purlin; and the supporting, regulating and controlling displacement assembly comprises a self-servo device. The foundation pit self-servo device has the advantages that the foundation pit is supported through the self-servo device, the structural stability of the foundation pit in the building process is guaranteed, compared with the prior art that supporting force is provided through the rigidity of a supporting piece, the foundation pit deformation control effect is achieved, and the foundation pit self-servo device has high safety and controllability.

Description

Technical Field

[0001] The utility model relates to the field of foundation pit support, and particularly relates to an adaptive support structure for foundation pit support. Background Art

[0002] With the continuous expansion of the urban scale and the continuous improvement of people's living standards, the current demand for the utilization of underground space is increasing. When excavating deep foundation pits in deep soft soil areas of cities, problems such as how to ensure the safety of foundation pit projects, control the deformation of the surrounding environment of foundation pits, and facilitate engineering construction are faced.

[0003] Generally, after setting corner braces or other internal supports in the foundation pit, only the stiffness can be relied on to provide support force to control displacement, and it is impossible to conveniently apply prestress, and the deformation of the foundation pit (trench) cannot be better controlled.

[0004] Based on this, it is urgent to develop a concrete support system to actively control the deformation and axial force of the concrete support, so as to limit the deformation of the foundation pit retaining structure and reduce the disturbance of the foundation pit excavation construction to the surrounding environment. Summary of the Utility Model

[0005] In view of the above technical problems, the utility model provides an adaptive support structure for foundation pit support.

[0006] The technical solution is as follows: it includes a waling assembly, the waling assembly includes a diaphragm wall waling and a support waling, the support waling includes a waling main member and a waling connecting member, the diaphragm wall waling and the waling main member are arranged relatively at intervals to form a foundation pit, the waling connecting member is arranged in the foundation pit, the waling connecting member is connected to the waling main member, and a pouring gap is reserved between the waling connecting member and the diaphragm wall waling;

[0007] A support displacement control assembly, the support displacement control assembly includes a self-servo device;

[0008] Two embedded steel plates, one embedded steel plate is arranged on each of the diaphragm wall waling and the support waling, the self-servo device is located in the foundation pit, the self-servo device is arranged in a way to avoid the waling connecting member, the self-servo device abuts between the two embedded steel plates, and the self-servo device is a telescopic self-servo device.

[0009] Preferably, the self-servo device includes a fixed end and a movable end, the fixed end and the movable end are coaxially arranged, and the movable end expands and contracts along the axis direction of the fixed end, the fixed end is connected to the diaphragm wall waling, and the movable end is connected to the support waling.

[0010] Preferably, an embedded steel plate is arranged between the movable end and the support waling, and between the fixed end and the diaphragm wall waling respectively, and the cross-sectional dimension of the embedded steel plate is much larger than the cross-sectional dimension of the movable end and the cross-sectional dimension of the fixed end.

[0011] Preferably, the two embedded steel plates are arranged in parallel, the axis of the fixed end is perpendicular to the embedded steel plate, the connecting steel bars are connected to the embedded steel plate, the embedded steel plate between the movable end and the supporting purlin is connected to the supporting purlin through the connecting steel bars, the embedded steel plate between the fixed end and the diaphragm wall purlin is connected to the diaphragm wall purlin through the connecting steel bars, the number of the connecting steel bars is multiple, the connecting steel bars are arranged at intervals on the embedded steel plate in turn, the embedded steel plate and the connecting steel bars are welded by perforation plug welding, and the axis of the perforation on the embedded steel plate coincides with the axis of the connecting steel bars.

[0012] Preferably, a diaphragm wall reinforcement cage is arranged inside the diaphragm wall purlin; a support reinforcement cage is arranged inside the support purlin; the support reinforcement cage includes a main component reinforcement cage and a connecting component reinforcement cage connected to each other; the main component reinforcement cage is arranged inside the purlin main component, the connecting component reinforcement cage is arranged inside the purlin connecting component, the connecting steel bars are connected to the diaphragm wall reinforcement cage, and the connecting steel bars are connected to the main component reinforcement cage.

[0013] The beneficial effects brought by the technical solution provided by the embodiment of the present invention are as follows: 1. For this self-servo connection structure, by setting a self-servo device to support the foundation pit, the structural stability during the construction of the foundation pit is ensured. Compared with the prior art that relies on the stiffness of the support member to provide the support force, it plays a role in controlling the deformation of the foundation pit and has strong safety and controllability;

[0014] 2. For this self-servo connection structure, by setting a pouring gap between the support purlin and the diaphragm wall purlin, a certain amount of deformation is allowed between the diaphragm wall purlin and the support purlin. By adding a telescopic self-servo device to realize the support of the foundation pit, and further adding embedded steel plates to prevent the self-servo device from directly squeezing the support purlin and the diaphragm wall purlin on both sides, resulting in cracking at the contact position of the foundation pit and further reducing the overall stability of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic connection diagram of the support control displacement component and the purlin component according to the embodiment of the present invention.

[0016] Figure 2 It is a schematic connection diagram of the diaphragm wall reinforcement cage and the support reinforcement cage according to the embodiment of the present invention.

[0017] Wherein, the reference numerals are: 100, purlin component; 101, diaphragm wall purlin; 1011, diaphragm wall reinforcement cage; 102, support purlin; 1021, purlin main component; 1022, purlin connecting component; 1023, support reinforcement cage; 10231, main component reinforcement cage; 10232, connecting component reinforcement cage; 200, support control displacement component; 201, self-servo device; 2011, fixed end; 2012, movable end; 300, embedded steel plate; 400, connecting steel bar. Detailed implementation mode

[0018] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "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 the present utility model 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0022] Embodiment 1

[0023] See Figures 1 to 2, the present utility model provides an adaptive support structure for foundation pit support, a waling assembly 100. The waling assembly 100 includes a diaphragm wall waling 101 and a support waling 102. The support waling 102 includes a waling main member 1021 and a waling connecting member 1022. The diaphragm wall waling 101 and the waling main member 1021 are arranged at a relative interval to form a foundation pit. The waling connecting member 1022 is arranged in the foundation pit and is connected to the waling main member 1021. A pouring gap is reserved between the waling connecting member 1022 and the diaphragm wall waling 101;

[0024] A support control displacement assembly 200, the support control displacement assembly 200 includes a self-servo device 201;

[0025] Two embedded steel plates 300, one embedded steel plate 300 is provided on each of the diaphragm wall waling 101 and the support waling 102. The self-servo device 201 is located in the foundation pit and is arranged in a way to avoid the waling connecting member 1022. The self-servo device 201 abuts between the two embedded steel plates 300, and the self-servo device 201 is a telescopic self-servo device 201.

[0026] By setting a pouring gap between the support waling 102 and the diaphragm wall waling 101, the diaphragm wall waling 101 and the support waling 102 have a certain amount of deformation. By adding a telescopic self-servo device 201, the support of the foundation pit is realized, avoiding the deformation of the foundation pit. Further adding the embedded steel plates 300 can prevent the self-servo device 201 from directly squeezing the two side support waling 102 and the diaphragm wall waling 101, resulting in cracking at the contact position of the foundation pit and further reducing the overall stability of the foundation pit.

[0027] Working principle:

[0028] Build a support steel reinforcement cage 1023 and a diaphragm wall steel reinforcement cage 1011, and reserve a pouring gap between the two. Arrange the embedded steel plates 300 on the opposite walls of the installation area, and respectively fixedly connect the connecting steel bars 400 arranged on the embedded steel plates 300 to the support steel reinforcement cage 1023 and the diaphragm wall steel reinforcement cage 1011. Lay wire meshes and concrete layers on the outer sides of the support steel reinforcement cage 1023 and the diaphragm wall steel reinforcement cage 1011 in sequence. Add a color strip cloth between the wire meshes and the concrete at the pouring gap. Wait for the concrete to take shape to complete the construction of the diaphragm wall waling 101 and the support waling 102;

[0029] Place the self - servo device 201 in the installation area, where the movable end 2012 and the fixed end 2011 respectively correspond to the embedded steel plates 300. Start the self - servo device 201, and the self - servo device 201 expands and contracts axially. The self - servo device 201 squeezes the diaphragm wall purlin 101 and the support purlin 102 through the embedded steel plates 300 to realize the support of the foundation pit. Fill the pouring gap with concrete to fix the foundation pit. After the foundation pit is built, remove the self - servo device 201 from the foundation pit.

[0030] Preferred embodiment:

[0031] The self - servo device 201 is a jack, and the self - servo device 201 and the foundation pit are detachably connected.

[0032] It should be noted that the jack can apply hydraulic axial force between the diaphragm wall purlin 101 and the support purlin 102, convert hydraulic energy into mechanical energy, and control the lateral displacement of the continuous wall and the deformation of the foundation pit.

[0033] The support control displacement assembly 200 further includes: ① a hydraulic station, which is connected to the self - servo device 201 through a hydraulic pipe, and part of the hydraulic pipe is arranged in the foundation pit; ② a control cabinet, which is connected to the hydraulic station through an integrated data cable, and both the hydraulic station and the control cabinet are arranged outside the foundation pit.

[0034] It should be noted that

[0035] The functions of the hydraulic station are: ① convert mechanical energy into hydraulic energy, and provide pressure, flow and direction control according to the requirements of the control cabinet; ② detect the pressure in the hydraulic system in real time and transmit the data to the control cabinet.

[0036] The functions of the control cabinet are: ① comprehensively monitor the real - time operation of the connected hydraulic station and the axial force of each self - servo device 201; ② can set operation parameters, where the operation parameters include pressure, etc.; ③ transmit the data to the processing center through 4G Internet of Things.

[0037] Specifically, the self - servo device 201 includes a fixed end 2011 and a movable end 2012. The fixed end 2011 and the movable end 2012 are coaxially arranged, and the movable end 2012 expands and contracts along the axis direction of the fixed end 2011. The fixed end 2011 is connected to the diaphragm wall purlin 101, and the movable end 2012 is connected to the support purlin 102.

[0038] There is an embedded steel plate 300 between the movable end 2012 and the support purlin 102, and between the fixed end 2011 and the diaphragm wall purlin 101. The cross - sectional size of the embedded steel plate 300 is much larger than the cross - sectional sizes of the movable end 2012 and the fixed end 2011 to disperse the pressure exerted by the self - servo device 201 on the support purlin 102 and the diaphragm wall purlin 101.

[0039] By adding embedded steel plates 300, where the embedded steel plates 300 are respectively located between the self - servo device 201 and the diaphragm wall purlin 101, and between the self - servo device 201 and the support purlin 102, it is avoided that the movable end 2012 and the fixed end 2011 directly contact the foundation pit wall, resulting in too concentrated stress on the foundation pit wall, causing excessive pressure and affecting the stability of the overall structure of the foundation pit.

[0040] To ensure that the embedded steel plates 300 can effectively contact the self - servo device 201, the two embedded steel plates 300 are arranged in parallel, and the axis of the fixed end 2011 is perpendicular to the embedded steel plates 300; the connecting steel bars 400 are connected to the embedded steel plates 300. The embedded steel plate 300 between the movable end 2012 and the support purlin 102 is connected to the support purlin 102 through the connecting steel bar 400, and the embedded steel plate 300 between the fixed end 2011 and the diaphragm wall purlin 101 is connected to the diaphragm wall purlin 101 through the connecting steel bar 400; the number of connecting steel bars 400 is multiple, and the connecting steel bars 400 are arranged at intervals on the embedded steel plates 300; the embedded steel plates 300 and the connecting steel bars 400 are connected by plug - welding through holes; the axis of the through - holes on the embedded steel plates 300 coincides with the axis of the connecting steel bars 400.

[0041] The diaphragm wall reinforcement cage 1011 is arranged inside the diaphragm wall purlin 101; the support reinforcement cage 1023 is arranged inside the support purlin 102; the support reinforcement cage 1023 includes a main part reinforcement cage 10231 and a connecting part reinforcement cage 10232 which are connected; the main part reinforcement cage 10231 is arranged inside the purlin main part 1021, and the connecting part reinforcement cage 10232 is arranged inside the purlin connecting part 1022.

[0042] To ensure good connection stability among the embedded steel plates 300, the diaphragm wall purlin 101 and the support purlin 102, the connecting steel bars 400 are connected to the diaphragm wall reinforcement cage 1011, and the connecting steel bars 400 are connected to the main part reinforcement cage 10231.

[0043] In one embodiment of the present utility model, the connecting steel bars 400 and the support reinforcement cage 1023 are connected by welding, the connecting steel bars 400 and the main part reinforcement cage 10231 are connected by welding, and the connecting part reinforcement cage 10232 and the main part reinforcement cage 10231 are welded together.

[0044] In another embodiment of the present utility model, the connecting steel bars 400 and the support reinforcement cage 1023 are connected by wire bundling, the connecting steel bars 400 and the main part reinforcement cage 10231 are connected by wire bundling, and the connecting part reinforcement cage 10232 and the main part reinforcement cage 10231 are connected by wire bundling.

[0045] The number of the waling connectors 1022 is multiple, and the waling connectors 1022 are arranged at intervals in sequence along the length direction of the foundation pit. An installation area is arranged between the opposite side surfaces of adjacent waling connectors 1022, and at least one self-servo device 201 is arranged in the installation area;

[0046] By limiting the waling connectors 1022, after the pouring gap is filled, the waling connectors 1022 can stably connect the two side walls of the foundation pit, avoiding uneven stress on the two side walls of the foundation pit after the self-servo device 201 is taken out from the foundation pit and affecting the overall structural stability.

[0047] In one embodiment of the present utility model, the exposed outer side surface of the support reinforcement cage 1023 is sequentially covered with a wire mesh and a concrete layer; the exposed outer side surface of the diaphragm wall reinforcement cage 1011 is sequentially covered with a wire mesh and a concrete layer; the outer side surface of the concrete layer in the foundation pit is flush with the outer side surface of the embedded steel plate 300; by limiting the outer side surface of the concrete layer in the foundation pit and the outer side surface of the embedded steel plate 300, after the construction of the diaphragm wall waling 101 and the support waling 102 is completed, the inner wall of the foundation pit is flat, which is convenient for related construction operations. In addition, the poured concrete layer can further support and limit the embedded steel plate 300; a color strip cloth is arranged between the opposite side surfaces of the diaphragm wall reinforcement cage 1011 and the connector reinforcement cage 10232 close to the pouring gap, and the color strip cloth is arranged between the wire mesh and the concrete layer to separate the wire mesh and the concrete layer, and the color strip cloth is a nylon color strip cloth.

[0048] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A foundation pit support adaptive support structure, characterized in that: The invention comprises a purlin assembly (100), wherein the purlin assembly (100) comprises a ground wall purlin (101) and a supporting purlin (102), wherein the supporting purlin (102) comprises a purlin main part (1021) and a purlin connecting part (1022), wherein the ground wall purlin (101) and the purlin main part (1021) are arranged at a relative interval to form a foundation pit, wherein the purlin connecting part (1022) is arranged in the foundation pit, wherein the purlin connecting part (1022) is connected to the purlin main part (1021), and a casting gap is reserved between the purlin connecting part (1022) and the ground wall purlin (101); A support and regulation displacement assembly (200), wherein the support and regulation displacement assembly (200) comprises a self-servo device (201); Two embedded steel plates (300), the ground wall purlin (101) and the supporting purlin (102) are each provided with an embedded steel plate (300), the self-servo device (201) is located in the foundation pit, the self-servo device (201) is arranged in a manner of avoiding the purlin connection piece (1022), the self-servo device (201) is abutted between the two embedded steel plates (300), and the self-servo device (201) is a retractable self-servo device (201).

2. The adaptive support structure for foundation pit support according to claim 1 is characterized in that: The self-servo device (201) comprises a fixed end (2011) and a movable end (2012), the fixed end (2011) and the movable end (2012) are coaxially arranged, and the movable end (2012) is retractable along the axis direction of the fixed end (2011), the fixed end (2011) is connected to a ground wall purlin (101), and the movable end (2012) is connected to a supporting purlin (102).

3. The adaptive support structure for foundation pit support according to claim 2 is characterized in that: An embedded steel plate (300) is provided between the movable end (2012) and the supporting purlin (102), and between the fixed end (2011) and the ground wall purlin (101), respectively. The cross-sectional dimensions of the embedded steel plate (300) are much larger than the cross-sectional dimensions of the movable end (2012) and the cross-sectional dimensions of the fixed end (2011).

4. The adaptive support structure for foundation pit support according to claim 3 is characterized in that: The two embedded steel plates (300) are arranged in parallel, the axis of the fixed end (2011) is perpendicular to the embedded steel plate (300), the connecting steel bar (400) is connected to the embedded steel plate (300), the embedded steel plate (300) between the movable end (2012) and the supporting purlin (102) is connected to the supporting purlin (102) via the connecting steel bar (400), the embedded steel plate (300) between the fixed end (2011) and the ground wall purlin (101) is connected to the ground wall purlin (101) via the connecting steel bar (400), the number of the connecting steel bars (400) is multiple, the connecting steel bars (400) are arranged in sequence at intervals on the embedded steel plate (300), the embedded steel plate (300) and the connecting steel bar (400) are plug-welded, and the axis of the perforation on the embedded steel plate (300) coincides with the axis of the connecting steel bar (400).

5. The adaptive support structure for foundation pit support according to claim 4 is characterized in that: A ground wall steel cage (1011) is arranged inside the ground wall purlin (101); a supporting steel cage (1023) is arranged inside the supporting purlin (102); the supporting steel cage (1023) comprises a main steel cage (10231) and a connecting steel cage (10232) which are connected to each other; the main steel cage (10231) is arranged inside the purlin main part (1021); the connecting steel cage (10232) is arranged inside the purlin connecting part (1022); the connecting steel bars (400) are connected to the ground wall steel cage (1011); and the connecting steel bars (400) are connected to the main steel cage (10231).

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