Local variable-amplitude tension supporting single body and variable-amplitude supporting device composed of same

Abstract

The utility model discloses a local variable-amplitude tension supporting single body and a variable-amplitude supporting device composed of the local variable-amplitude tension supporting single body, and relates to the technical field of building engineering. The variable-amplitude supporting device comprises a plurality of local variable-amplitude tensioning supporting single bodies, the local variable-amplitude tensioning supporting single bodies are detachably connected, each supporting body in each local variable-amplitude tensioning supporting single body comprises a supporting longitudinal rod body, a supporting base body and an upper fixing pull rod body, the supporting base body is arranged at the bottom of each supporting longitudinal rod body, and the upper fixing pull rod body is arranged at the bottom of each supporting longitudinal rod body. The supporting base body is fixed to the bottom of a foundation pit, an upper fixing pull rod body is installed at the upper end of the supporting longitudinal rod body, and the other end of the upper fixing pull rod body is fixed to the ground. A plurality of tension adjusting pieces are sequentially arranged between the two supporting longitudinal rod bodies from bottom to top; the supporting plate body is vertically arranged between the two supporting longitudinal rod bodies, the two sides of the supporting plate body are connected with the two supporting longitudinal rod bodies in an inserted mode respectively, and the two supporting bodies make reciprocating motion in the mode that the two supporting bodies get close to each other or get away from each other through the multiple tension adjusting pieces.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building engineering, and particularly relates to a local amplitude tensioning supporting single body and a tensioning supporting device composed of the same. BACKGROUND

[0002] A foundation pit is a soil pit excavated at a foundation design position according to a foundation elevation and a foundation plane size, and the quality of a foundation pit supporting engineering is positively correlated with the cost thereof. That is, as the engineering quality improves, the materials and construction technology required are often more complex and delicate, thereby leading to an increase in the engineering cost. This is because a high-quality foundation pit supporting engineering needs to adopt more advanced supporting technology, higher-quality materials, and more stringent construction technology to ensure the stability and safety of the foundation pit. Before excavation, the excavation scheme should be determined according to geological and hydrological data in combination with the situation of buildings near the site, and waterproofing and drainage work should be done. For a shallow foundation pit, a slope can be used to make the soil slope stable, and for a deep foundation pit, a foundation pit supporting device must be used to support the side of the foundation pit. However, the existing building foundation pit supporting device has some problems in actual use, leading to an increase in the cost, mainly including:

[0003] 1. The supporting device with a fixed structure has limitations and cannot be adjusted according to the actual situation of the pit foundation during supporting. In the construction site, there is a lack of local use performance of temporarily supporting corresponding parts and areas as needed, and the supporting device needs to be excavated to a length matching the supporting device to be installed, leading to a risk of collapse during excavation.

[0004] 2. The supporting device is in an integral form, has high supporting efficiency, but is time-consuming and labor-intensive during transportation and installation, increases the overall cost, and has limited compression resistance. When impact, treading, transportation, and installation collide, damage and deformation will cause hidden troubles such as subsequent jamming and normal use of the overall structure, and the replacement of parts is complex, making the maintenance cost fluctuate, and the cost is difficult to accurately control. CONTENT OF THE UTILITY MODEL

[0005] To solve the problems mentioned in the background technology, the purpose of the utility model is to provide a local amplitude tensioning supporting single body and a tensioning supporting device composed of the same.

[0006] A local amplitude tensioning supporting single body comprises a supporting plate body, a plurality of tensioning adjusting pieces, and two supporting bodies. The two supporting bodies are vertically arranged side by side. Each supporting body comprises a supporting vertical rod body, a supporting base body, and an upper fixed tension rod body. The bottom of each supporting vertical rod body is provided with a supporting base body, the supporting base body is fixed at the bottom of the foundation pit, the upper end of the supporting vertical rod body is provided with an upper fixed tension rod body, and the other end of the upper fixed tension rod body is fixed to the ground.

[0007] A plurality of tension adjusting members are arranged between the two support longitudinal rod bodies from bottom to top; the support plate body is vertically arranged between the two support longitudinal rod bodies, the two sides of the support plate body are respectively inserted with the two support longitudinal rod bodies, the two support bodies make reciprocating movement of relative approaching or relative moving away through the plurality of tension adjusting members, when the two support bodies make relative approaching movement through the plurality of tension adjusting members to form a narrow spacing, the support plate body is a narrow plate body, the narrow plate body is vertically inserted between the two support bodies; when the two support bodies make relative moving away movement through the plurality of tension adjusting members to form a wide spacing, the support plate body is a wide plate body, the wide plate body is vertically inserted between the two support bodies.

[0008] As a preferred scheme: T-shaped sliding grooves and insertion grooves are formed on the left and right side walls of each support longitudinal rod body, a pull rod connecting threaded hole is arranged on the upper end surface of the support longitudinal rod body, a plurality of concave support grooves one are formed on the inner side wall of the support longitudinal rod body.

[0009] As a preferred scheme: each support base body comprises a support seat, a fixing seat and a ground insertion rod, a plurality of fixing seats are arranged on the left and right side walls of the support seat, a ground insertion rod hole is formed on the fixing seat, and the ground insertion rod is inserted into the ground insertion rod hole.

[0010] As a preferred scheme: a fixing groove is formed at the front end of the support seat, the fixing groove is a front opening type, a locking threaded hole is formed on the left and right side walls of the front side of the support seat, the locking threaded hole is in communication with the fixing groove, a locking bolt is connected in the locking threaded hole, and a concave support groove two is formed on the upper end surface of the support seat.

[0011] As a preferred scheme: the tension adjusting member comprises a T-shaped sliding block one, a T-shaped sliding block two, a screw sleeve rod, a rotary adjuster and a screw rod body, the screw sleeve rod is arranged on the inner side wall of the T-shaped sliding block one, the rotary adjuster is arranged on the inner side wall of the T-shaped sliding block two, the other end of the rotary adjuster is provided with the screw rod body, and the screw rod body is connected in the internal thread of the screw sleeve rod.

[0012] As a preferred scheme: a plurality of sliding block fixing threaded holes are formed on the T-shaped sliding block one and the T-shaped sliding block two, and a jack screw is arranged in the sliding block fixing threaded hole.

[0013] As a preferred scheme: the rotary adjuster comprises an outer seat body, an upper cover body, a T-shaped rotary rod and a hexagonal rotary body, the T-shaped rotary rod is arranged in the rotary hole of the outer seat body, the upper cover body is sleeved on the outer upper side of the T-shaped rotary rod and is arranged on the upper end surface of the outer seat body through a bolt, and the upper end of the T-shaped rotary rod is provided with the hexagonal rotary body.

[0014] As a preferred scheme: the support plate body comprises an outer frame body, a plurality of transverse slats and a plurality of longitudinal slats; the inner part of the outer frame body is provided with the plurality of transverse slats and the plurality of longitudinal slats, the plurality of transverse slats are uniformly arranged in the outer frame body along the length direction of the outer frame body, and the two ends of each transverse slat are fixedly connected with the inner walls of the two ends of the outer frame body; the plurality of longitudinal slats are uniformly arranged in the outer frame body along the width direction of the outer frame body, one end of each longitudinal slat is fixedly connected with the inner wall of one side of the outer frame body, and the other end of each longitudinal slat is fixedly connected with the inner wall of the other side of the outer frame body after sequentially penetrating through the plurality of transverse slats.

[0015] As a preferred scheme: the one end of the upper fixed pull rod body is provided with a mounting through hole, the upper end of the mounting through hole is connected with a counterbore, the bottom of the one end of the upper fixed pull rod body is provided with a sleeving groove matched with the support longitudinal rod body, the mounting through hole is communicated with the sleeving groove, a plurality of pull rope rods are mounted at the other end of the upper fixed pull rod body, and a plurality of fixed through holes are formed at the other side of the upper fixed pull rod body.

[0016] A variable-amplitude support device is composed of the above local variable-amplitude tension support monomer, comprising a plurality of local variable-amplitude tension support monomers, the plurality of local variable-amplitude tension support monomers are detachably connected, each local variable-amplitude tension support monomer comprises a support plate body, a plurality of tension adjusting members and two support bodies, the two support bodies are vertically arranged side by side, each support body comprises a support longitudinal rod body, a support base body and an upper fixed pull rod body, the bottom of each support longitudinal rod body is provided with the support base body, the support base body is fixed at the bottom of the foundation pit, the upper end of the support longitudinal rod body is provided with the upper fixed pull rod body, and the other end of the upper fixed pull rod body is fixed on the ground.

[0017] The plurality of tension adjusting members are sequentially arranged between the two support longitudinal rod bodies from bottom to top; the support plate body is vertically arranged between the two support longitudinal rod bodies, and the two sides of the support plate body are respectively inserted into the two support longitudinal rod bodies; the two support bodies make reciprocating motion of approaching or moving away from each other through the plurality of tension adjusting members, when the two support bodies make approaching motion through the plurality of tension adjusting members to form a narrow interval, the support plate body is a narrow plate body, and the narrow plate body is vertically inserted between the two support bodies; when the two support bodies make moving away motion through the plurality of tension adjusting members to form a wide interval, the support plate body is a wide plate body, and the wide plate body is vertically inserted between the two support bodies.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] The local variable-amplitude tension supporting monomer in the utility model can carry out local supporting according to the excavation progress and position, is favorable for orderly and normative development of the supporting process, improves the safe operation, reduces the collapse probability of large-area construction, even if local collapse occurs, the position relationship between the supporting plate body, the plurality of tension adjusting pieces and the two supporting bodies can realize the adjusting blocking effect of the longitudinal multi-layer structure, is favorable for guiding the predetermined earth pressure, saves manpower and construction redundancy, and is favorable for reducing the construction cost.

[0020] The variable-amplitude supporting device in the utility model is a supporting structure of different widths formed by assembly, can carry out large-area wide supporting and small-area local supporting as required, is favorable for combination and corresponding disassembly as required, improves the corresponding property of supporting demand, saves the cost, can replace the corresponding damaged position when extrusion, impact or other conditions occur, has low replacement difficulty, reduces the maintenance cost, improves the safety factor of coping with different collapse conditions, and specific advantages are:

[0021] 1. The tension adjusting piece is used to adjust the distance between the two supporting longitudinal rod bodies, is convenient for installation of supporting plate bodies of different sizes, can be used for corresponding adjusting supporting treatment during excavation, improves the continuous safe supporting performance, avoids the collapse of large area, and forms a small-area damage delay processing mode of corresponding collapse.

[0022] 2. The supporting base body is used to fix the lower end of the supporting longitudinal rod body, and the upper fixed rod body is used to fix the upper end of the supporting longitudinal rod body, so that the stability of the supporting longitudinal rod body is improved, and the supporting longitudinal rod body is not prone to tilting.

[0023] 3. The supporting plate body adopts a grid plate, the grid plate is stressed in multiple directions, even if collapse occurs, it will not occur instantaneously, the staff inside the foundation pit has sufficient time to escape, and the grid plate has low cost and is convenient to disassemble. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to facilitate the description, the utility model is described in detail by the following specific embodiments and drawings.

[0025] Figure 1 It is a front view structural schematic diagram of the local variable-amplitude tension supporting monomer in the utility model;

[0026] Figure 2 It is a front view structural schematic diagram of the variable-amplitude supporting device in the utility model;

[0027] Figure 3 It is a structural schematic diagram of the supporting longitudinal rod body;

[0028] Figure 4 It is a structural schematic diagram of the supporting base body;

[0029] Figure 5 This is a schematic diagram of the tension adjustment component;

[0030] Figure 6 This is a schematic diagram of the rotary regulator.

[0031] Figure 7 This is a structural schematic diagram of the support plate.

[0032] Figure 8 This is a structural diagram of the upper fixed tie rod body;

[0033] Figure 9 for Figure 8 A schematic diagram of the structure viewed from below;

[0034] Figure 10 A top view schematic diagram showing the connection relationship between the supporting longitudinal rod, the supporting base, the tensioning adjustment component, and the support plate.

[0035] In the diagram: 1-Supporting longitudinal rod; 2-Supporting base; 3-Tensioning adjustment component; 4-Support plate; 5-Upper fixed tie rod.

[0036] 1-1-T-type slide groove; 1-2-Insertion groove; 1-3-Pull-in threaded hole for tie rod connection; 1-4-Support groove one;

[0037] 2-1-Support base; 2-2-Fixed base; 2-3-Ground rod; 2-4-Locking bolt;

[0038] 2-11-Fixing groove; 2-12-Support groove two;

[0039] 2-21-Pole insertion hole;

[0040] 3-1-T-type slider one; 3-2-T-type slider two; 3-3-Screw sleeve rod; 3-4-Rotation adjuster; 3-5-Screw body;

[0041] 3-11-Slider fixing threaded hole;

[0042] 3-41-Outer base; 3-42-Upper cover; 3-43-T-shaped rotating rod; 3-44-Hexagonal rotating body;

[0043] 4-1 Outer frame; 4-2 Horizontal slats; 4-3 Vertical slats;

[0044] 5-1-Pull rope rod; 5-2-Fixing through hole; 5-3-Installation through hole; 5-4-Counterhead hole; 5-5-Socket groove. Detailed Implementation

[0045] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following will describe the utility model through the specific embodiments shown in the drawings. However, it should be understood that these descriptions are only exemplary and not to limit the scope of the utility model. The structure, proportion, size etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by the person skilled in the art and not to limit the limiting conditions that the utility model can be implemented, so it does not have the substantial meaning in technology, any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that the utility model can produce, should still fall within the range covered by the technical content disclosed by the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0046] Here, it also needs to be explained that, in order to avoid the utility model from being obscured by unnecessary details, only the structures and / or processing steps closely related to the scheme according to the utility model are shown in the drawings, and other details not closely related to the utility model are omitted.

[0047] Specific implementation method one: combined Figure 1 , Figures 3 to 10 In this embodiment, the partial amplitude tensioning support unit includes a support plate body 4, a plurality of tensioning adjusting pieces 3 and two support bodies, the two support bodies are vertically arranged side by side, each support body includes a support longitudinal rod body 1, a support base body 2 and an upper fixed pull rod body 5, the bottom of each support longitudinal rod body 1 is provided with a support base body 2, the support base body 2 is fixed at the bottom of the foundation pit, and the upper end of the support longitudinal rod body 1 is provided with an upper fixed pull rod body 5, the other end of the upper fixed pull rod body 5 is fixed on the ground;

[0048] The plurality of tensioning adjusting pieces 3 are arranged between the two support longitudinal rod bodies 1 from bottom to top; the support plate body 4 is vertically arranged between the two support longitudinal rod bodies 1, and the two sides of the support plate body 4 are respectively inserted with the two support longitudinal rod bodies 1, the two support bodies make reciprocating motion of relative approaching or relative moving away through the plurality of tensioning adjusting pieces 3, when the two support bodies make relative approaching motion through the plurality of tensioning adjusting pieces 3 to form a narrow width interval, the support plate body 4 is a narrow width plate body, and the narrow width plate body is vertically inserted between the two support bodies; when the two support bodies make relative moving away motion through the plurality of tensioning adjusting pieces 3 to form a wide width interval, the support plate body 4 is a wide width plate body, and the wide width plate body is vertically inserted between the two support bodies.

[0049] The position relationship between the support plate body 4, the plurality of tension adjustment pieces 3 and the two support bodies in the embodiment realizes the adjustable blocking effect of the longitudinal multi-layer structure, which mainly reflects the inner and outer multi-layer arrangement structure of the support plate body 4 and the adjusted tension adjustment piece 3. The support plate body 4 and the support body cooperate to form an outer support structure, which directly contacts the soil layer. The tension adjustment piece 3 is an inner support structure, which realizes the limiting support effect of the support plate body 4 and the two support bodies, and plays a role of resisting the local side wall of the earthwork.

[0050] In the embodiment, the structure of the tension adjustment piece 3 is a rod piece. The tension adjustment piece 3 can not only adjust the distance between the two support longitudinal rod bodies 1, but also cooperate with the support plate body 4 to realize the support effect of the inner and outer composite form after tensioning, so as to realize the corresponding real-time change adjustment according to the excavation progress, realize the effective support of the corresponding area, and save the support cost.

[0051] In the embodiment, the support plate body 4 with different widths is selected according to the construction situation of different stages. The composition structure of each support plate body 4 with different widths is the same, and only the width is different. When the two support bodies are relatively close to each other through the plurality of tension adjustment pieces 3 to form a narrow spacing, the size of the narrow spacing is matched with the width of the support plate body 4. The narrow plate body with the matched width is selected. The narrow plate body is a structure form of the support plate body 4. When the two support bodies are relatively far away from each other through the plurality of tension adjustment pieces 3 to form a wide spacing, the size of the wide spacing is matched with the width of the support plate body 4. The wide plate body with the matched width is selected. The wide plate body is another structure form of the support plate body 4.

[0052] The plurality of support longitudinal rod bodies 1 are connected through the plurality of tension adjustment pieces 3. The tension adjustment piece 3 is used to adjust the distance between the two support longitudinal rod bodies 1, so as to facilitate the installation of the support plate body 4 with different sizes. Figure 2 As shown in the figure, the left and right side walls of the support longitudinal rod body 1 are provided with a T-shaped sliding groove 1-1 and a plug-in groove 1-2. The T-shaped sliding groove 1-1 can realize the installation of the tension adjustment piece 3. The upper end surface of the support longitudinal rod body 1 is provided with a pull rod connecting threaded hole 1-3. The inner side wall of the support longitudinal rod body 1 is provided with a plurality of concave support grooves 1-4.

[0053] As described above, as shown in the figure, Figure 5As shown, in this specific embodiment, the tensioning adjustment component 3 can adjust the position installed on the supporting longitudinal rod 1, and also adjust the distance between the two supporting longitudinal rods 1. The specific technical solution is as follows: The tensioning adjustment component 3 includes a T-shaped slider 3-1, a T-shaped slider 3-2, a threaded rod 3-3, a rotary adjuster 3-4, and a screw body 3-5; the threaded rod 3-3 is installed on the inner wall of the T-shaped slider 3-1, and the rotary adjuster 3-4 is installed on the inner wall of the T-shaped slider 3-2. The other end of the rotary adjuster 3-4 is equipped with a screw body 3-5, which is connected to the internal thread of the threaded rod 3-3. The T-shaped slider 3-1... T-shaped sliders 3-2 are respectively installed in the T-shaped grooves 1-1 of the two supporting longitudinal rods 1. Each of the T-shaped sliders 3-1 and 3-2 has several slider fixing threaded holes 3-11. Set screws are installed in the slider fixing threaded holes 3-11. After the T-shaped sliders 3-1 and 3-2 have selected their installation positions in the T-shaped grooves 1-1, they are fixed by the set screws. During adjustment, the screw body 3-5 is rotated by rotating the rotary adjuster 3-4 to facilitate length adjustment and enable quick adjustment of the distance between the two supporting longitudinal rods 1.

[0054] As stated above, Figure 6 As shown, the rotary adjuster 3-4 described in this specific embodiment includes an outer base 3-41, an upper cover 3-42, a T-shaped rotating rod 3-43, and a hexagonal rotating body 3-44. The T-shaped rotating rod 3-43 is disposed in the rotating hole of the outer base 3-41 and can rotate within the rotating hole of the outer base 3-41. The upper cover 3-42 is sleeved on the upper outer side of the T-shaped rotating rod 3-43 and is installed on the upper end face of the outer base 3-41 by bolts. The upper cover 3-42 can fix the T-shaped rotating rod 3-43. The hexagonal rotating body 3-44 is installed on the upper end of the T-shaped rotating rod 3-43. During adjustment, the hexagonal rotating body 3-44 drives the T-shaped rotating rod 3-43 to rotate. After the hexagonal rotating body 3-44 is connected to the screw body 3-5, it can drive the screw body 3-5 to rotate.

[0055] like Figure 1 As shown, in this specific embodiment, a support plate 4 is inserted between two supporting longitudinal rods 1 to achieve support. The specific technical solution adopted is as follows: It includes a support plate 4; the support plate 4 is inserted between two supporting longitudinal rods 1, and the support plate 4 is used to protect the pit sidewall. Figure 6As shown, the support plate 4 includes an outer frame 4-1, transverse strips 4-2, and longitudinal strips 4-3. Several transverse strips 4-2 and longitudinal strips 4-3 are evenly installed inside the outer frame 4-1. The transverse strips 4-2 and longitudinal strips 4-3 are fixed together to form a grid plate. The outer frame 4-1 can improve the overall strength. At the same time, the grid plate is subjected to forces in multiple directions, so even if it collapses, it will not happen instantly, giving the workers inside the pit enough time to escape. In addition, the grid plate is low in cost and easy to disassemble.

[0056] like Figure 1 As shown, in this specific embodiment, the bottom of the supporting longitudinal rod 1 is fixed by the supporting base body 2, and the upper end of the supporting longitudinal rod 1 is fixed by the upper fixing tie rod body 5, which can achieve the fixation of the supporting longitudinal rod 1 both vertically and horizontally. The specific technical solution is as follows: it includes a supporting base body 2 and an upper fixing tie rod body 5; the supporting base body 2 is provided at the bottom of the supporting longitudinal rod 1 and is fixed at the bottom of the foundation pit; the upper fixing tie rod body 5 is installed at the upper end of the supporting longitudinal rod 1 and the other end of the upper fixing tie rod body 5 is fixed to the ground.

[0057] As stated above, Figure 4 As shown, in this specific embodiment, the bottom of the supporting longitudinal rod 1 is fixed by a supporting base 2. The specific technical solution is as follows: The supporting base 2 includes a supporting seat 2-1, a fixing seat 2-2, a grounding rod 2-3, and a locking bolt 2-4; several fixing seats 2-2 are installed on the left and right side walls of the supporting seat 2-1. The fixing seats 2-2 have grounding rod holes 2-21, and grounding rods 2-3 are inserted into these holes. The grounding rods 2-3 are inserted into the grounding rod holes 2-21 of the fixing seats 2-2, thus fixing the supporting seat 2-1; a fixing groove 2-11 is provided at the front end of the supporting seat 2-1, and the fixing groove 2-11 is open at the front end. Locking threaded holes are provided on the left and right side walls of the front side of the support base 2-1. The locking threaded holes are connected to the fixing groove 2-11. The locking bolt 2-4 is connected in the locking threaded holes. The fixing groove 2-11 limits the bottom of the support longitudinal rod 1. At the same time, the locking bolt 2-4 is used to fix the support longitudinal rod 1. The upper end face of the support base 2-1 is provided with a concave support groove 2-12. In order to improve the stability between the support base 2-1 and the support longitudinal rod 1, a support rod is used to support between the support groove 1-4 and the support groove 2-12. This can improve stability. At the same time, there are several support grooves 1-4 and 2-12, which makes it easy to select the support position when supporting.

[0058] As stated above, Figure 8 and Figure 9As shown in the specific embodiment, the upper end of the supporting vertical rod body 1 is fixed by the upper fixed pull rod body 5, and the following technical solutions are adopted: one end of the upper fixed pull rod body 5 is provided with a mounting through hole 5-3, the upper end of the mounting through hole 5-3 is connected with a counterbore 5-4, a bolt can be connected in the mounting through hole 5-3 and connected with the pull rod connecting threaded hole 1-3 of the supporting vertical rod body 1, the bottom of one end of the upper fixed pull rod body 5 is provided with a sleeving groove 5-5 matched with the supporting vertical rod body 1, the sleeving groove 5-5 can be sleeved on the upper end of the supporting vertical rod body 1, the mounting through hole 5-3 is communicated with the sleeving groove 5-5, the other end of the upper fixed pull rod body 5 is provided with a plurality of pull rope rods 5-1, the pull rope rods 5-1 can be connected with the pull rope, the pull rope is used to realize the secondary fixation of the other end of the upper fixed pull rod body 5, a plurality of fixed through holes 5-2 are arranged on the other side of the upper fixed pull rod body 5, and the ground insertion rods 2-3 are arranged in the fixed through holes 5-2, so that the upper fixed pull rod body 5 is fixed by the ground insertion rods 2-3.

[0059] Specific embodiment two: combined with Figures 1 to 10 As shown, the amplitude variable support device in the specific embodiment includes a plurality of local amplitude variable tension support units, which are detachably connected between the plurality of local amplitude variable tension support units. Each local amplitude variable tension support unit includes a support plate body 4, a plurality of tension adjusting members 3, and two support bodies. The two support bodies are vertically arranged side by side. Each support body includes a supporting vertical rod body 1, a supporting base body 2, and an upper fixed pull rod body 5. The bottom of each supporting vertical rod body 1 is provided with a supporting base body 2, which is fixed at the bottom of the foundation pit. The upper end of the supporting vertical rod body 1 is provided with an upper fixed pull rod body 5, and the other end of the upper fixed pull rod body 5 is fixed on the ground.

[0060] The plurality of tension adjusting members 3 are arranged between the two supporting vertical rod bodies 1 from bottom to top. The support plate body 4 is vertically arranged between the two supporting vertical rod bodies 1, and the two sides of the support plate body 4 are respectively inserted into the two supporting vertical rod bodies 1. The two support bodies make reciprocating motion of approaching or moving away from each other through the plurality of tension adjusting members 3. When the two support bodies make approaching motion through the plurality of tension adjusting members 3 to form a narrow interval, the support plate body 4 is a narrow plate body, which is vertically inserted between the two support bodies. When the two support bodies make moving away motion through the plurality of tension adjusting members 3 to form a wide interval, the support plate body 4 is a wide plate body, which is vertically inserted between the two support bodies. The structures and connection modes not mentioned in this embodiment are the same as those in specific embodiment one.

[0061] The working principle of the amplitude variable support device is as follows:

[0062] In the installation, a support longitudinal rod body 1 is fixed in the foundation pit, in the fixing, a support base body 2 is used to fix the lower part of the support longitudinal rod body 1, the fixing groove 2-11 of the support base body 2 is clamped in the lower end of the support longitudinal rod body 1, and is locked through the locking bolt 2-4, meanwhile, the ground insertion rod 2-3 is used to realize the fixing of the support base 2-1, the sleeve joint groove 5-5 of the upper fixed pull rod body 5 is sleeved in the upper end of the support longitudinal rod body 1 and is fixed through the bolt, the ground insertion rod 2-3 is inserted in the fixed through hole 5-2 to fix the upper fixed pull rod body 5 on the ground, the pull rope is connected with the pull rope rod 5-1, the secondary fixing of the upper fixed pull rod body 5 is realized through the pull rope, then the support rod is supported in the support groove one 1-4 and the support groove two 2-12, the stability between the support longitudinal rod body 1 and the support base body 2 can be improved, the support rod is the existing steel pipe, wooden stick and telescopic rod etc., then the tension adjusting piece 3 is installed in the T-shaped sliding groove 1-1 of the two support longitudinal rod bodies 1, then the distance between the two support longitudinal rod bodies 1 is adjusted through the tension adjusting piece 3, after the adjustment is completed, another support longitudinal rod body 1 is fixed, the support plate body 4 is inserted in the insertion groove 1-2 of the two support longitudinal rod bodies 1, the support of the inner wall of the foundation pit is realized through the support plate body 4, then the number of the installed support longitudinal rod bodies 1 is realized according to the length and width of the foundation pit, when the foundation pit is excavated, the support base body 2 and the upper fixed pull rod body 5 of the support longitudinal rod body 1 at the excavation are disassembled, the position of the support longitudinal rod body 1 is adjusted through the tension adjusting piece 3, so that the support longitudinal rod body 1 is close to the excavation, at this time, the large size support plate body 4 is replaced to realize the support of the foundation pit, meanwhile, another support longitudinal rod body 1 can be installed at the excavation, so reciprocating can realize the protection of the corresponding position during the excavation, reduces the accident probability and the maintenance cost.

Claims

1. A local variable amplitude tensioned support cell, characterized by: The utility model provides a kind of support plate body (4), several tensile adjusting parts (3) and two support bodies, two support bodies are vertically and parallelly arranged, and each support body includes support vertical rod body (1), support base body (2) and upper fixed pull rod body (5), the bottom of each support vertical rod body (1) is provided with support base body (2), support base body (2) is fixed at the bottom of foundation pit, and the upper end of support vertical rod body (1) is equipped with upper fixed pull rod body (5), and the other end of upper fixed pull rod body (5) is fixed on ground; Several tensile adjusting parts (3) are sequentially arranged between two support vertical rod bodies (1) from bottom to top;Support plate body (4) is vertically arranged between two support vertical rod bodies (1), and the two sides of support plate body (4) are respectively inserted with two support vertical rod bodies (1), and two support bodies make reciprocating motion of relative approach or relative away through several tensile adjusting parts (3), when two support bodies make relative approach motion and form narrow width spacing through several tensile adjusting parts (3), support plate body (4) is narrow width plate body, and narrow width plate body is vertically inserted between two support bodies;When two support bodies make relative away motion and form wide width spacing through several tensile adjusting parts (3), support plate body (4) is wide width plate body, and wide width plate body is vertically inserted between two support bodies.

2. A partial amplitude-zoned tensile support cell according to claim 1, characterized in that: T-shaped sliding groove (1-1) and insertion slot (1-2) are formed on the left and right side walls of each support vertical rod body (1), pull rod connecting threaded hole (1-3) is formed on the upper end surface of the support vertical rod body (1), and a plurality of concave support grooves (1-4) are formed on the inner side wall of the support vertical rod body (1).

3. A partial amplitude-zoned tensile support cell according to claim 1 or 2, characterized in that: Each support base body (2) includes support seat (2-1), fixing seat (2-2), and ground insertion rod (2-3), a plurality of fixing seats (2-2) are installed on the left and right side walls of the support seat (2-1), a ground insertion rod hole (2-21) is formed in the fixing seat (2-2), and the ground insertion rod (2-3) is inserted into the ground insertion rod hole (2-21).

4. A partial amplitude-zoned tensile support cell according to claim 3, wherein: A fixing groove (2-11) is formed in the front end of the support seat (2-1), the fixing groove (2-11) is a front opening type, locking screw holes are formed on the left and right side walls of the front side of the support seat (2-1), the locking screw holes are in communication with the fixing groove (2-11), a locking bolt (2-4) is connected in the locking screw hole, and a concave support groove (2-12) is formed on the upper end surface of the support seat (2-1).

5. A local amplitude-zoned tensile support cell according to claim 1, characterized in that: The tensile adjusting part (3) includes T-shaped sliding block one (3-1), T-shaped sliding block two (3-2), screw sleeve rod (3-3), rotary adjuster (3-4), and screw rod body (3-5), the screw sleeve rod (3-3) is installed on the inner side wall of the T-shaped sliding block one (3-1), the rotary adjuster (3-4) is installed on the inner side wall of the T-shaped sliding block two (3-2), the other end of the rotary adjuster (3-4) is equipped with screw rod body (3-5), and the screw rod body (3-5) is connected in the internal thread of the screw sleeve rod (3-3).

6. A partial amplitude zonal tensile support cell according to claim 5, wherein: A plurality of sliding block fixing screw holes (3-11) are formed on the T-shaped sliding block one (3-1) and the T-shaped sliding block two (3-2), and a jack screw is installed in the sliding block fixing screw hole (3-11).

7. A partial amplitude zonal tensile support cell according to claim 5 or 6, wherein: The rotation regulator (3-4) comprises an outer seat body (3-41), an upper cover body (3-42), a T-shaped rotation rod (3-43) and a hexagonal rotation body (3-44); the T-shaped rotation rod (3-43) is arranged in a rotation hole of the outer seat body (3-41), the upper cover body (3-42) is sleeved on the outer upper side of the T-shaped rotation rod (3-43) and is mounted on the upper end surface of the outer seat body (3-41) through bolts, and the upper end of the T-shaped rotation rod (3-43) is provided with the hexagonal rotation body (3-44).

8. A local amplitude-zoned tensile support cell according to claim 1, characterized in that: The support plate body (4) comprises an outer frame body (4-1), a plurality of transverse slats (4-2) and a plurality of longitudinal slats (4-3); the inner portion of the outer frame body (4-1) is provided with a plurality of transverse slats (4-2) and a plurality of longitudinal slats (4-3), the plurality of transverse slats (4-2) are evenly arranged in the outer frame body (4-1) along the length direction of the outer frame body (4-1), the two ends of each transverse slat (4-2) are fixedly connected with the inner walls of the two ends of the outer frame body (4-1), and the plurality of longitudinal slats (4-3) are evenly arranged in the outer frame body (4-1) along the width direction of the outer frame body (4-1), one end of each longitudinal slat (4-3) is fixedly connected to the inner wall on one side of the outer frame body (4-1), and the other end of each longitudinal slat (4-3) is fixedly connected to the inner wall on the other side of the outer frame body (4-1) after sequentially penetrating through a plurality of transverse slats (4-2).

9. A local amplitude-zoned tensile support cell according to claim 1, characterized in that: The upper fixed pull rod body (5) is provided with a mounting through hole (5-3) at one end, a counterbore (5-4) is connected to the upper end of the mounting through hole (5-3), a sleeving groove (5-5) matched with the support longitudinal rod body (1) is formed at the bottom of one end of the upper fixed pull rod body (5), the mounting through hole (5-3) is in communication with the sleeving groove (5-5), a plurality of pull rope rods (5-1) are mounted at the other end of the upper fixed pull rod body (5), and a plurality of fixed through holes (5-2) are formed at the other side of the upper fixed pull rod body (5).

10. A variable amplitude bracing device consisting of a plurality of the partial variable amplitude bracing units of any one of claims 1 to 9. The local amplitude variable tension support system comprises a plurality of local amplitude variable tension support units, the plurality of local amplitude variable tension support units are detachably connected, each local amplitude variable tension support unit comprises a support plate body (4), a plurality of tension adjusting members (3) and two support bodies, the two support bodies are vertically arranged side by side, each support body comprises a support longitudinal rod body (1), a support base body (2) and an upper fixed pull rod body (5), the bottom of each support longitudinal rod body (1) is provided with the support base body (2), the support base body (2) is fixed at the bottom of the foundation pit, the upper end of the support longitudinal rod body (1) is provided with the upper fixed pull rod body (5), and the other end of the upper fixed pull rod body (5) is fixed on the ground; Several tension adjusting pieces (3) are arranged between the two support longitudinal rod bodies (1) from bottom to top; a support plate body (4) is vertically arranged between the two support longitudinal rod bodies (1), the two sides of the support plate body (4) are respectively inserted with the two support longitudinal rod bodies (1), the two support bodies make reciprocating movement of relatively approaching or relatively moving away through the several tension adjusting pieces (3), when the two support bodies make relative approaching movement through the several tension adjusting pieces (3) to form a narrow spacing, the support plate body (4) is a narrow plate body, the narrow plate body is vertically inserted between the two support bodies; when the two support bodies make relative moving away movement through the several tension adjusting pieces (3) to form a wide spacing, the support plate body (4) is a wide plate body, the wide plate body is vertically inserted between the two support bodies.

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