Groove excavation supporting structure and construction method thereof

Abstract

The invention relates to the technical field of construction supporting, in particular to a groove excavation supporting structure and a construction method thereof.The groove excavation supporting structure comprises a groove, protection plates, supporting mechanisms and adjusting mechanisms, the protection plates are arranged on the two sides of the groove, the supporting mechanisms are used for supporting the two adjacent protection plates, and the supporting mechanisms are arranged between the two adjacent protection plates; the adjusting mechanism used for adjusting the overall length of the first supporting rod and the second supporting rod is connected to the first supporting rod, stable supporting can be formed on the two sides of the groove through the arrangement of the protection plate and the supporting mechanism, and meanwhile the overall length of the supporting mechanism is effectively reduced through a foldable connecting structure in the supporting mechanism; the supporting mechanism is simple in structure and convenient to disassemble, assemble and transport, meanwhile, stable supporting can be rapidly formed between every two adjacent protection plates in the grooves through the arrangement of the adjusting mechanism, the overall length of the supporting mechanism can be adjusted to a certain degree, and the supporting mechanism can be suitable for being used in the grooves with different widths.

Description

Technical Field

[0001] The present application relates to the technical field of construction support, and in particular to a trench excavation support structure and a construction method thereof. Background Art

[0002] Trench excavation is a civil engineering construction technology mainly used to install underground facilities such as pipelines, cables, drainage systems, etc. During the excavation process, earthwork is excavated according to the design drawings to form a trench of a specific width and depth to provide space and a stable support foundation for the subsequent installation of facilities. The size and support requirements of the trench depend on the geological conditions, trench depth and construction environment, and are usually combined with drainage treatment to ensure that the bottom of the trench is dry and flat.

[0003] During trench excavation, special attention should be paid to safety and trench stability. During excavation, the slope and support structure of the trench should be set reasonably to prevent trench wall collapse. For trenches with greater depth, appropriate support devices should be designed according to the soil conditions, and the stability of the support should be checked at all times. In addition, groundwater infiltration may affect excavation safety, so a drainage system should be prepared in advance to remove accumulated water in a timely manner. The excavated soil should be piled away from the edge of the trench to avoid the risk of collapse of the trench edge due to excessive accumulation. At the same time, ensure that construction workers wear necessary protective equipment to maintain ventilation inside the trench and a clean and tidy construction environment. Therefore, during trench excavation, how to provide support is a very important issue in the construction process.

[0004] In the related technology, since the current supports are mostly composed of a combination of guard plates and support rods, the guard plates are abutted against the two sides of the groove, and the guard plates on both sides are supported by the support rods to form a support structure. However, the length of the current support rods is mostly fixed. When in use, it is necessary to connect multiple support rods according to actual conditions so that they can span the inside of the groove and support the guard plates on both sides. However, the current support rods are mostly locked by screws when connected, and the guard plates in the groove often need to be supported by several support rods. This results in a lot of time being spent on tightening the screws on the support rods during disassembly and assembly, and the operation is cumbersome, time-consuming and labor-intensive. At the same time, since the length of the support rod is fixed, the support rod cannot quickly adapt to grooves of different widths during support, and cannot form a stable support in the groove. Summary of the invention

[0005] In order to solve the problem that the support rods in the current support structure need to be screwed with a large number of screws during disassembly and assembly, which is cumbersome, time-consuming and labor-intensive, seriously affecting work efficiency, and cannot be applied to grooves of different widths, the present application provides a trench excavation support structure and a construction method thereof.

[0006] In the first aspect, a trench excavation support structure provided in the present application adopts the following technical solution: A trench excavation support structure and its construction method, comprising: A trench, with guard plates arranged on both sides of the trench; A support mechanism for supporting two adjacent guard plates, and the support mechanism is arranged between two adjacent guard plates. The support mechanism includes a support base, a linkage seat, a linkage rod, a docking rod, a first support rod, and a second support rod. The support base is fixed on one of the guard plates, and an installation cavity is arranged inside the support base. The linkage seat is slidably clamped in the installation cavity of the support base. The linkage rod is fixed at one end of the linkage seat, and the linkage rod passes through the support base and is slidably connected to the support base. One end of the docking rod is rotatably connected to the end of the linkage rod away from the linkage seat, and the other end of the docking rod is fixed on the first support rod. A rectangular cavity is arranged at the end of the first support rod away from the docking rod. The second support rod is slidably clamped in the rectangular cavity and forms an integral structure with the first support rod. The end of the second support rod away from the first support rod abuts against the other guard plate; An adjustment mechanism for adjusting the overall length of the first support rod and the second support rod, and the adjustment mechanism is connected to the first support rod.

[0007] By adopting the above technical solution, the stable supports can be formed on both sides of the trench through the arrangement of the guard plates and the support mechanism, avoiding the collapse of the trench side walls during construction. At the same time, through the foldable connection structure in the support mechanism, the overall length of the support mechanism is effectively reduced, which is convenient for disassembly, installation, and transportation. During installation, by rotating the adjustment disk, the linkage seat can be quickly linked, thereby driving the first support rod, the second support rod, and the linkage rod to be quickly located on the same axis, realizing the functions of quick folding and extension, which is simple and efficient; By using the adjustment mechanism, after the support mechanism is installed, the staff can rotate the turntable to make the meshing reel rotate, and then make the helical grooves mesh and link. The second support rod slides in the first support rod until one end of the second support rod abuts against the guard plate and abuts firmly to form a stable support. It saves time and effort and also solves the problem that the current support rods have a unified length and cannot firmly abut between the guard plates to form a stable support.

[0008] Optionally, the support mechanism further includes a rotating rod, an adjustment disk, and a rocker arm. The rotating rod is rotatably connected to the support base. A U-shaped notch is arranged on the linkage seat. The adjustment disk is slidably clamped in the U-shaped notch of the linkage seat. The bottom end of the rotating rod is fixed at the edge of the adjustment disk, and the rocker arm is fixed at the top end of the rotating rod.

[0009] By adopting the above technical solution, the rocker arm is used to drive the rotating rod to rotate, and then the rotating rod drives the adjusting disk to rotate, and the adjusting disk drives the linkage seat to slide quickly in the supporting seat.

[0010] Optionally, a guide rod is fixed in the installation cavity of the support seat, and at least two guide rods are provided and symmetrically fixed on both sides of the installation cavity. A through hole is penetrated on the linkage seat, and the guide rod is slidably engaged in the through hole of the linkage seat.

[0011] By adopting the above technical solution, the linkage seat is limited by the guide rod so that it can slide in a directional manner.

[0012] Optionally, the support mechanism also includes a ratchet, a pawl and a reset member, the ratchet is coaxially fixed on the rotating rod, one end of the pawl is rotatably connected to the top of the support seat, and the other end slides against the edge of the ratchet, and the reset member is connected between the pawl and the support seat.

[0013] By adopting the above technical solution, the elastic force of the reset member is utilized to enable the pawl to always abut against the ratchet wheel, and the ratchet wheel is limited by the pawl, thereby limiting and locking the rotating rod.

[0014] Optionally, a blocking rod is fixed to the top of the support seat, two blocking rods are provided and are symmetrically arranged on both sides of the support seat, and the rocker arm abuts against the blocking rod.

[0015] By adopting the above technical solution, the stop lever is used to limit the rotation angle of the rocker arm.

[0016] Optionally, the adjustment mechanism includes a supporting seat, a turntable, an engaging reel and a beveled tooth groove, the supporting seat is rotatably connected to the first support rod, the turntable is rotatably connected to one end of the supporting seat, the engaging reel is coaxially fixed to the turntable, the beveled tooth groove is arranged on the side wall of the second support rod, and a slot is penetrated on the first support rod, the beveled tooth groove portion is located in the slot of the first support rod, and the engaging reel is engaged with the beveled tooth groove.

[0017] By adopting the above technical solution, the rotation of the turntable drives the engagement reel to rotate, thereby causing the helical teeth to engage and link, so that the second support rod can slide inside the first support rod.

[0018] Optionally, a cam is rotatably connected to one end of the supporting seat away from the rotating disk, and a round rod is fixed on the side wall of the cam, and the cam is slidably abutted against the side wall of the first supporting rod.

[0019] By adopting the above technical solution, the cam is used to limit the supporting seat, so that the engaging reel can quickly engage and disengage with the bevel groove, so that when the second support rod needs to slide quickly, the engaging reel can be separated from the bevel groove, and when the second support rod needs to abut against the guard plate support, the engaging reel can be engaged with the bevel groove, thereby limiting the second support rod.

[0020] Optionally, a handle is fixed at the axis of the turntable, and the handle is in a Z-shaped structure.

[0021] By adopting the technical solution, the turntable can be quickly rotated by using the turning handle.

[0022] Optionally, a rectangular plate is provided at the abutting end of the second support rod and the guard plate, and a rubber gasket is provided on the side wall of the rectangular plate.

[0023] By adopting the above technical solution, the rectangular plate is used to increase the contact area between the second support rod and the guard plate, and the friction force is increased by the rubber gasket to prevent the rectangular plate from sliding.

[0024] In a second aspect, the present application also provides a construction method, comprising the following steps: S1. Measure and lay out. According to the pipeline design longitudinal section and the actual situation on site, calculate the trench width, draw construction white lines on both sides of the trench, spread white lime lines, accurately lay out the boundary lines of the road that needs to be broken and cleared, cut the edge lines with a cutting machine, crush the concrete layer with a hydraulic crushing head in an orderly manner, clean and remove road debris with an excavator, load slag and discard it, mark the 20#a type channel steel piling points at the white lime lines on both sides of the trench at intervals of 0.5m, and the depth of the channel steel embedded in the soil is 1m deeper than the trench depth; S2. Installation of retaining plates. After the channel steel piles are clamped and hoisted to the piling position with a vibrating hammer, the pile positions are adjusted. The channel steel openings on both sides of the trench face the trench along the trench. After the adjustment is completed, the pile driver starts static pressure injection. After the channel steel piles are pressed down 1m, the verticality is measured and adjusted with a theodolite. After correction, static pressure injection is started again until the construction elevation is reached. Then the retaining plates are set vertically, and excavation is carried out layer by layer. The retaining plates are supported layer by layer. The bottom ends of the retaining plates are higher than the trench bottom and are closely arranged and attached to the trench wall. S3, soil retaining plate support installation, after the soil retaining plate is installed, the support seat is fixed on one side of the soil retaining plate, and then the swing arm is rotated to rotate the adjusting disk, and the linkage seat is driven to slide in the support seat through the adjusting disk, and the linkage rod is driven to move at the same time, and the docking rod is driven to move through the linkage rod, so that one end of the docking rod is in contact with the support seat, and under the limiting action of the support seat, the docking rod rotates on the linkage rod, and drives the first support rod and the second support rod to be synchronously linked as a whole, so that the whole is on the same axis as the linkage rod; S4. Support adjustment. After the linkage rod is installed, the turntable is driven to rotate by turning the handle to rotate the engaging reel, thereby engaging the bevel tooth groove to make the second support rod slide inside the first support rod until one end of the second support rod abuts against the earth retaining plate on the other side and the abutment is firm to form a stable support.

[0025] By adopting the above technical solution, the folding structure of the support mechanism is utilized to make the support rod as a whole easy to carry and disassemble, and at the same time, through the setting of the adjustment mechanism, a stable support can be quickly formed between two adjacent guard plates in the groove, and the overall length of the support mechanism can be adjusted to a certain extent, so that it can be suitable for use in grooves of different widths.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The guard plate and the support mechanism are used to form a stable support on both sides of the groove, so as to avoid the side wall of the groove from collapsing during construction. At the same time, the foldable connection structure in the support mechanism effectively reduces the overall length of the support mechanism, which is convenient for disassembly and transportation. During installation, the linkage seat can be quickly linked by rotating the adjustment disk, thereby driving the first support rod, the second support rod and the linkage rod to be quickly located on the same axis, so that the function of rapid folding and extension can be realized, which is simple and efficient. 2. By using the setting of the adjustment mechanism, after the support mechanism is installed as a whole, the staff can rotate the engagement reel by turning the turntable, thereby engaging the helical tooth grooves, so that the second support rod slides inside the first support rod until one end of the second support rod abuts against the guard plate, and the abutment is firm to form a stable support, which saves time and effort while also solving the problem that the current support rods have a uniform length and cannot abut firmly between the guard plates to form a stable support; 3. Use the cam to limit the support seat, so that the engaging reel can quickly engage and disengage with the bevel groove, so that when the second support rod needs to slide quickly, the engaging reel can be separated from the bevel groove, and when the second support rod needs to abut against the guard plate support, the engaging reel can be engaged with the bevel groove, thereby limiting the second support rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the external structure of a trench excavation support structure and a construction method thereof in this embodiment.

[0028] Figure 2 Schematic diagram of the groove cross-section structure in this embodiment.

[0029] Figure 3 Schematic diagram of the supporting mechanism and its overall connection structure in this embodiment.

[0030] Figure 4Schematic diagram of the support base connection structure in this embodiment.

[0031] Figure 5 Schematic diagram of the guide rod connection structure in this embodiment.

[0032] Figure 6 Schematic diagram of the structure of the regulating mechanism in this embodiment.

[0033] Figure 7 It is a schematic diagram of the supporting seat connection structure in this embodiment.

[0034] Description of reference numerals: 1. Groove; 2. Guard plate; 3. Support mechanism; 31. Support seat; 32. Linkage seat; 33. Linkage rod; 34. Docking rod; 35. First support rod; 36. Second support rod; 37. Turntable; 38. Adjustment disk; 39. Rocker arm; 310. Guide rod; 311. Ratchet; 312. Paw; 313. Reset member; 314. Stop rod; 4. Adjustment mechanism; 41. Support seat; 42. Turntable; 43. Engaging reel; 44. Bevel tooth groove; 45. Cam; 46. Turn handle. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-7 This application is described in further detail.

[0036] The embodiments of the present application disclose a trench excavation support structure and a construction method thereof.

[0037] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In a first aspect, the present application provides a trench excavation support structure: Reference Figure 1 and Figure 2, a trench excavation support structure and a construction method thereof, comprising a trench 1, a guard plate 2, a support mechanism 3 and an adjustment mechanism 4, guard plates 2 are arranged on both sides of the trench 1, the support mechanism 3 is used to support two adjacent guard plates 2, and the support mechanism 3 is arranged between the two adjacent guard plates 2, and the adjustment mechanism 4 for adjusting the overall length of the first support rod 35 and the second support rod 36 is connected to the first support rod 35, through the arrangement of the guard plates 2 and the support mechanism 3, a stable support can be formed on both sides of the trench 1 to avoid the side wall of the trench 1 from collapsing during construction, and at the same time, through the foldable connection structure in the support mechanism 3, the overall length of the support mechanism 3 is effectively reduced, which is convenient for disassembly, assembly and transportation, and at the same time, through the arrangement of the adjustment mechanism 4, a stable support can be quickly formed between the two adjacent guard plates 2 in the trench 1, and the overall length of the support mechanism 3 can be adjusted to a certain extent, so that it can be suitable for use in trenches 1 of different widths.

[0039] Reference Figure 3 Specifically, the support mechanism 3 includes a support seat 31, a linkage seat 32, a linkage rod 33, a docking rod 34, a first support rod 35 and a second support rod 36; the linkage seat 32 can be quickly linked by rotating the adjusting disk 38, thereby driving the first support rod 35, the second support rod 36 and the linkage rod 33 to be quickly located on the same axis, so that it can realize the function of rapid folding and stretching, which is simple and efficient.

[0040] The support seat 31 is fixed on the guard plate 2 on one side, and an installation cavity is provided inside the support seat 31. The linkage seat 32 is slidably clamped in the installation cavity of the support seat 31. The linkage rod 33 is fixed to one end of the linkage seat 32, and the linkage rod 33 passes through the support seat 31 and is slidably connected to the support seat 31. One end of the docking rod 34 is rotatably connected to the end of the linkage rod 33 away from the linkage seat 32, and the other end of the docking rod 34 is fixed to the first support rod 35. A rectangular cavity is provided on the end of the first support rod 35 away from the docking rod 34. The second support rod 36 is slidably clamped in the rectangular cavity and together with the first support rod 35 constitute an integral structure, and the end of the second support rod 36 away from the first support rod 35 abuts against the guard plate 2 on the other side.

[0041] Reference Figure 4 and Figure 5, in the embodiment of the present application regarding the support mechanism 3, the support mechanism 3 further includes a rotating rod 37, an adjusting disk 38, a rocker arm 39, a guide rod 310, a ratchet wheel 311, a ratchet pawl 312 and a reset member 313. The rocker arm 39 is used to drive the rotating rod 37 to rotate, and then drive the adjusting disk 38 to rotate through the rotating rod 37. The adjusting disk 38 drives the linkage seat 32 to slide rapidly in the support seat 31, and at the same time, the guide rod 310 is used to limit the linkage seat 32, so that it can slide in a fixed direction. When the rocker arm 39 rotates, the first ratchet pawl 312 can always abut against the first ratchet wheel 311 by the elastic force of the first reset member 313, and the first ratchet wheel 311 is limited by the first ratchet pawl 312, thereby limiting and locking the rotating rod 37.

[0042] The rotating rod 37 is rotatably connected to the support seat 31. A U-shaped notch is provided on the linkage seat 32. The adjusting disk 38 is slidably clamped in the U-shaped notch of the linkage seat 32, and the bottom end of the rotating rod 37 is fixed at the edge of the adjusting disk 38. The rocker arm 39 is fixed at the top end of the rotating rod 37. At least two guide rods 310 are symmetrically fixed on both sides of the installation cavity, and through holes are provided through the linkage seat 32. The guide rods 310 are slidably clamped in the through holes of the linkage seat 32. The first ratchet wheel 311 is coaxially fixed on the rotating rod 37. One end of the first ratchet pawl 312 is rotatably connected to the top of the support seat 31, and the other end slidably abuts against the edge of the first ratchet wheel 311. The first reset member 313 is connected between the first ratchet pawl 312 and the support seat 31.

[0043] Refer to Figure 6 and Figure 7 , in the embodiment of the present application, regarding the adjusting mechanism 4, the adjusting mechanism 4 includes a supporting seat 41, a turntable 42, an engaging reel 43 and a helical tooth groove 44. By setting the adjusting mechanism 4, after the support mechanism 3 is installed as a whole, the staff can rotate the turntable 42 to make the engaging reel 43 rotate, thereby making the helical tooth groove 44 engage and link, so that the second support rod 36 slides in the first support rod 35 until one end of the second support rod 36 abuts against the guard plate 2 and abuts firmly to form a stable support. This not only saves time and effort but also solves the problem that the current support rods have a unified length and cannot firmly abut between the guard plates to form a stable support.

[0044] In the embodiment of the present application, the supporting seat 41 is rotatably connected to the first support rod 35. The turntable 42 is rotatably connected to one end of the supporting seat 41. The engaging reel 43 is coaxially fixed on the turntable 42. The helical tooth groove 44 is provided on the side wall of the second support rod 36, and a notch is provided through the first support rod 35. Part of the helical tooth groove 44 is located in the notch of the first support rod 35, and the engaging reel 43 meshes with the helical tooth groove 44.

[0045] In the embodiment of the present application, regarding the support seat 31, a blocking rod 314 is fixed to the top of the support seat 31, two blocking rods 314 are provided, and are symmetrically arranged on both sides of the support seat 31, and the rocker arm 39 is abutted against the blocking rod 314, and the blocking rod 314 is used to limit the rotation angle of the rocker arm 39.

[0046] Specifically, a cam 45 is rotatably connected to one end of the support seat 41 away from the turntable 42, and a round rod is fixed on the side wall of the cam 45. The cam 45 slides against the side wall of the first support rod 35, and a handle 46 is fixed at the axis of the turntable 42, and the handle 46 has a Z-shaped structure.

[0047] The cam 45 is used to limit the supporting seat 41, so that the engaging reel 43 can quickly engage and disengage with the oblique tooth groove 44, so that the engaging reel 43 can be separated from the oblique tooth groove 44 when the second support rod 36 needs to slide quickly, and the engaging reel 43 can be engaged with the oblique tooth groove 44 when the second support rod 36 needs to be supported and abutted with the guard plate 2, thereby limiting the second support rod 36, and at the same time, the turntable 42 can be quickly rotated by the turn handle 46.

[0048] A rectangular plate is provided at the abutting end of the second support rod 36 and the guard plate 2, and a rubber gasket is provided on the side wall of the rectangular plate. The rectangular plate is used to increase the abutting area between the second support rod 36 and the guard plate 2, and the rubber gasket is used to increase the friction force to prevent the rectangular plate from sliding.

[0049] The implementation principle of a trench excavation support structure and its construction method in the embodiment of the present application is as follows: first, the guard plate 2 is attached to the side walls on both sides of the trench 1, and then the support seat 31 is fixed to the soil retaining guard plate on one side, and then the swing arm 39 is rotated to rotate the adjusting disk 38, and the linkage seat 32 is driven to slide in the support seat 31 through the adjusting disk 38, and at the same time, the linkage rod 33 is driven to move, and the docking rod 34 is driven to move through the linkage rod 33, so that one end of the docking rod 34 abuts against the support seat 31, and under the limiting action of the support seat 31, the docking rod 34 rotates on the linkage rod 33, and drives the first support rod 35 and the second support rod 36 to be synchronously linked as a whole, so that the whole is on the same axis as the linkage rod 33, and then the turning handle 46 is turned to drive the rotating disk 42 to rotate, so that the meshing reel 43 rotates, and then the oblique tooth groove 44 is meshed and linked, so that the second support rod 36 slides in the first support rod 35 until one end of the second support rod 36 abuts against the soil retaining guard plate on the other side, and the abutment is firm to form a stable support.

[0050] Second, refer to Figure 1-Figure 7 , the application also provides a construction method, comprising the following steps: S1. Measure and lay out. According to the pipeline design longitudinal section and the actual situation on site, calculate the trench width, draw construction white lines on both sides of the trench, spread white lime lines, accurately lay out the boundary lines of the road that needs to be broken and cleared, cut the edge lines with a cutting machine, crush the concrete layer with a hydraulic crushing head in an orderly manner, clean and remove road debris with an excavator, load slag and discard it, mark the 20#a type channel steel piling points at the white lime lines on both sides of the trench at intervals of 0.5m, and the depth of the channel steel embedded in the soil is 1m deeper than the trench depth; S2. Installation of retaining plates. After the channel steel piles are clamped and hoisted to the piling position with a vibrating hammer, the pile positions are adjusted. The channel steel openings on both sides of the trench face the trench along the trench. After the adjustment is completed, the pile driver starts static pressure injection. After the channel steel piles are pressed down 1m, the verticality is measured and adjusted with a theodolite. After correction, static pressure injection is started again until the construction elevation is reached. Then the retaining plates are set vertically, and excavation is carried out layer by layer. The retaining plates are supported layer by layer. The bottom ends of the retaining plates are higher than the trench bottom and are closely arranged and attached to the trench wall. S3, soil retaining plate support installation, after the soil retaining plate is installed, the support seat 31 is fixed on the soil retaining plate on one side, and then the swing arm 39 is rotated to rotate the adjusting disk 38, and the linkage seat 32 is driven to slide in the support seat 31 through the adjusting disk 38, and the linkage rod 33 is driven to move, and the docking rod 34 is driven to move through the linkage rod 33, so that one end of the docking rod 34 is in contact with the support seat 31, and under the limiting action of the support seat 31, the docking rod 34 rotates on the linkage rod 33, and drives the first support rod 35 and the second support rod 36 to be synchronously linked as a whole, so that the whole is on the same axis as the linkage rod 33; S4. Support adjustment. After the linkage rod 33 is installed, the turntable 42 is driven to rotate by turning the handle 46, so that the meshing reel 43 rotates, and then the bevel tooth groove 44 meshes and links, so that the second support rod 36 slides inside the first support rod 35 until one end of the second support rod 36 abuts against the earth retaining plate on the other side, and the abutment is firm to form a stable support.

[0051] By adopting the above technical solution, the folding structure of the support mechanism 3 is utilized to make the support rod as a whole easy to carry and disassemble, and at the same time, through the setting of the adjustment mechanism 4, a stable support can be quickly formed between two adjacent guard plates 2 in the groove 1, and the overall length of the support mechanism 3 can be adjusted to a certain extent, so that it can be suitable for use in grooves 1 of different widths.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A trench excavation support structure, characterized in that: Comprising: A groove (1), with guard plates (2) arranged on both sides of the groove (1); A support mechanism (3) for supporting two adjacent guard plates (2), and the support mechanism (3) is arranged between two adjacent guard plates (2). The support mechanism (3) includes a support base (31), a linkage base (32), a linkage rod (33), a docking rod (34), a first support rod (35) and a second support rod (36). The support base (31) is fixed on one of the guard plates (2), and an installation cavity is arranged inside the support base (31). The linkage base (32) is slidably clamped in the installation cavity of the support base (31). The linkage rod (33) is fixed at one end of the linkage base (32), and the linkage rod (33) passes through the support base (31) and is slidably connected to the support base (31). One end of the docking rod (34) is rotatably connected to the end of the linkage rod (33) away from the linkage base (32), and the other end of the docking rod (34) is fixed on the first support rod (35). A rectangular cavity is arranged at the end of the first support rod (35) away from the docking rod (34). The second support rod (36) is slidably clamped in the rectangular cavity and forms an integral structure with the first support rod (35), and the end of the second support rod (36) away from the first support rod (35) abuts against the other guard plate (2); An adjustment mechanism (4) for adjusting the overall length of the first support rod (35) and the second support rod (36), and the adjustment mechanism (4) is connected to the first support rod (35).

2. A trench excavation support structure according to claim 1, characterized in that: The support mechanism (3) further includes a rotating rod (37), an adjustment disc (38) and a rocker arm (39). The rotating rod (37) is rotatably connected to the support base (31). A U-shaped notch is arranged on the linkage base (32). The adjustment disc (38) is slidably clamped in the U-shaped notch of the linkage base (32), and the bottom end of the rotating rod (37) is fixed at the edge of the adjustment disc (38). The rocker arm (39) is fixed at the top end of the rotating rod (37).

3. A trench excavation support structure according to claim 1, characterized in that: A guide rod (310) is fixed in the installation cavity of the support base (31). At least two guide rods (310) are symmetrically fixed on both sides of the installation cavity, and through holes are arranged through the linkage base (32). The guide rod (310) is slidably clamped in the through holes of the linkage base (32).

4. A trench excavation support structure according to claim 2, characterized in that: The support mechanism (3) further includes a ratchet wheel (311), a ratchet pawl (312) and a reset member (313). The ratchet wheel (311) is coaxially fixed on the rotating rod (37). One end of the ratchet pawl (312) is rotatably connected to the top of the support base (31), and the other end slidably abuts against the edge of the ratchet wheel (311). The reset member (313) is connected between the ratchet pawl (312) and the support base (31).

5. A trench excavation support structure according to claim 2, characterized in that: A blocking rod (314) is fixed to the top of the support seat (31), two blocking rods (314) are provided and are symmetrically arranged on both sides of the support seat (31), and the rocker arm (39) abuts against the blocking rod (314).

6. A trench excavation support structure according to claim 1, characterized in that: The adjustment mechanism (4) comprises a supporting seat (41), a rotating disk (42), an engaging reel (43) and an oblique tooth groove (44); the supporting seat (41) is rotatably connected to the first support rod (35); the rotating disk (42) is rotatably connected to one end of the supporting seat (41); the engaging reel (43) is coaxially fixed to the rotating disk (42); the oblique tooth groove (44) is arranged on the side wall of the second support rod (36); a notch is penetrated through the first support rod (35); a portion of the oblique tooth groove (44) is located in the notch of the first support rod (35); and the engaging reel (43) is engaged with the oblique tooth groove (44).

7. A trench excavation support structure according to claim 6, characterized in that: A cam (45) is rotatably connected to one end of the support seat (41) away from the rotating disk (42), a round rod is fixed on the side wall of the cam (45), and the cam (45) is in sliding contact with the side wall of the first support rod (35).

8. A trench excavation support structure according to claim 6, characterized in that: A turning handle (46) is fixed at the axis center of the turning disk (42), and the turning handle (46) is in a Z-shaped structure.

9. A trench excavation support structure according to claim 1, characterized in that: A rectangular plate is provided at the abutting end of the second support rod (36) and the guard plate (2), and a rubber gasket is provided on the side wall of the rectangular plate.

10. A construction method, applied to a trench excavation support structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Measure and lay out. According to the pipeline design longitudinal section and the actual situation on site, calculate the trench width, draw construction white lines on both sides of the trench, spread white lime lines, accurately lay out the boundary lines of the road that needs to be broken and cleared, cut the edge lines with a cutting machine, crush the concrete layer with a hydraulic crushing head in an orderly manner, clean and remove road debris with an excavator, load slag and discard it, mark the 20#a type channel steel piling points at the white lime lines on both sides of the trench at intervals of 0.5m, and the depth of the channel steel embedded in the soil is 1m deeper than the trench depth; S2. Installation of retaining plates. After the channel steel piles are clamped and hoisted to the piling position with a vibrating hammer, the pile positions are adjusted. The channel steel openings on both sides of the trench face the trench along the trench. After the adjustment is completed, the pile driver starts static pressure injection. After the channel steel piles are pressed down 1m, the verticality is measured and adjusted with a theodolite. After correction, static pressure injection is started again until the construction elevation is reached. Then the retaining plates are set vertically, and excavation is carried out layer by layer. The retaining plates are supported layer by layer. The bottom ends of the retaining plates are higher than the trench bottom and are closely arranged and attached to the trench wall. S3, supporting and installing the retaining plate. After the retaining plate is installed, the support seat (31) is fixed on the retaining plate on one side. Then, the swing arm (39) is rotated to rotate the adjusting disk (38). The linkage seat (32) is driven to slide in the support seat (31) through the adjusting disk (38). At the same time, the linkage rod (33) is driven to move. The docking rod (34) is driven to move through the linkage rod (33). One end of the docking rod (34) is abutted against the support seat (31). Under the limiting action of the support seat (31), the docking rod (34) rotates on the linkage rod (33) and drives the first support rod (35) and the second support rod (36) to be synchronously linked as a whole, so that the whole is on the same axis as the linkage rod (33); S4, support adjustment, after the linkage rod (33) is installed, the rotating handle (46) is turned to drive the rotating disk (42) to rotate, so that the meshing reel (43) rotates, and then the oblique tooth groove (44) is meshed and linked, so that the second support rod (36) slides inside the first support rod (35) until one end of the second support rod (36) abuts against the earth retaining plate on the other side, and the abutment is stable to form a stable support.

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