Self-adaptive multi-dimensional pipe ditch supporting device

Abstract

The invention relates to the technical field of pipeline construction, and particularly discloses a self-adaptive multi-dimensional pipe ditch supporting device. Comprising an inclined self-adaptive moving chassis and a waist beam transverse supporting assembly, and a sliding rail is arranged on the upper surface of the inclined self-adaptive moving chassis in the ditch length direction; the waist beam transverse support assembly comprises a transverse support sliding block, a supporting hydraulic cylinder and a hydraulic transverse support. The cross brace sliding block is in sliding fit with a sliding groove in the sliding rail through a buckling wheel, so that the whole waist beam cross brace assembly can move in the groove length direction; a base of the supporting hydraulic cylinder is in sliding connection with the transverse support sliding block, so that the supporting width of the hydraulic transverse support can be transversely adjusted; according to the hydraulic cross brace, a pair of butt-joint powerful hydraulic cylinders drive supporting arms to be opened and closed, and bolt-free type self-adaptive supporting and rapid folding are achieved. The technical problems that in the prior art, a waist beam transverse support of a pile-support system interferes with pipeline installation, the waist beam transverse support and a row pile type concrete retaining wall depend on profile steel and high-strength bolt fastening, and the disassembling efficiency is low are solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of pipeline construction, and particularly discloses a self-adaptive multi-dimensional trench support device. BACKGROUND

[0002] As a core component of the urban lifeline system, the urban road water supply network undertakes the key task of transporting fluids necessary for urban operation. Under this background, the excavation and support of the road pipeline foundation pit become a crucial link in municipal water conservancy projects, and the construction quality and safety performance are directly related to the long-term stability of urban infrastructure and the safety guarantee of residents' life. With the continuous advancement of urban construction, the development and utilization of underground space are increasingly in-depth, and the scale of foundation pit engineering is continuously expanding and the depth is continuously increasing. The core challenge of deep foundation pit excavation is to effectively control soil deformation and minimize the disturbance to surrounding buildings and underground pipelines. Therefore, the application of deep foundation pit support structure is indispensable, and its core role is to stabilize the pit wall soil and prevent instability and collapse.

[0003] The current mainstream foundation pit support technology mainly adopts a "pile-brace" system: first, a reinforced concrete support pile wall (or a row pile type retaining wall) is constructed on the side wall of the foundation pit to form an initial soil retaining structure; then, a steel support (usually H-shaped steel or steel pipe) is erected on the surface of the pile wall, and a surrounding purlin (waist beam cross brace) is used to apply lateral restraint force to the steel support. The connection interface between the surrounding purlin and the steel support usually uses high-strength bolts to ensure that the support force is effectively transmitted to the support pile wall, thereby maintaining the stability of the foundation pit.

[0004] Although the above method can achieve the effect of stabilizing the pit wall soil of the foundation pit, in a typical municipal pipeline construction process (earth excavation → setting up a "pile-brace" system → placing and connecting a pipeline → backfilling the foundation pit → moving to the next section), the system has two outstanding problems: 1. Pipeline installation interference and disassembly risk: when the pipeline is placed, the surrounding purlin will interfere with the placement track of the pipeline and must be disassembled first. After disassembly, before the pipeline is placed or connected, the pit wall soil lacks key support constraints and has the risk of instability and collapse during construction. 2. Low efficiency of surrounding purlin disassembly: the surrounding purlin is a component that needs to be used repeatedly. After each section of pipeline construction is completed, it needs to be disassembled and transferred to the next foundation pit for repeated use. However, in the current technology, the surrounding purlin and the support pile wall are usually connected by steel and high-strength bolts, and the disassembly process is time-consuming and labor-intensive, which seriously delays the construction period.

[0005] Therefore, there is an urgent need in the industry for a support structure for the pit wall soil of the trench foundation pit that does not interfere with the pipeline placement into the foundation pit construction and is easy to disassemble and install. SUMMARY

[0006] The purpose of the present application is to provide a self-adaptive multi-dimensional pipe trench support device to solve the technical problems of the existing "pile-support" system, such as the interference of the waist beam cross support with the pipe installation, and the dependence of the waist beam cross support and the row-pile concrete retaining wall on the type steel and high-strength bolt fastening, and the low disassembly efficiency.

[0007] To solve the above problems, the technical scheme adopted by the present application is as follows: a self-adaptive multi-dimensional pipe trench support device, comprising a support retaining wall arranged on both sides of the pipe trench, characterized in that it further comprises an inclined self-adaptive moving base and a waist beam cross support assembly on the inclined self-adaptive moving base for supporting the support retaining wall, the upper surface of the inclined self-adaptive moving base is provided with a sliding rail along the length direction of the trench; the waist beam cross support assembly comprises a cross support sliding block, a support hydraulic cylinder and a hydraulic cross support; the cross support sliding block is slidably connected with the sliding groove on the sliding rail through a buckling wheel, so that the waist beam cross support assembly can slide along the length direction of the trench; the base of the support hydraulic cylinder is slidably connected with the upper end of the cross support sliding block, so that the hydraulic cross support can adjust the support width perpendicular to the length direction of the trench; the hydraulic cross support is driven by a pair of strong hydraulic cylinders to open and close the support arm, realizing self-adaptive support and rapid folding.

[0008] The beneficial effects of the present embodiment are as follows: In the prior art, the waist beam cross support of the "pile-support" system may interfere with the pipe installation, and the waist beam cross support and the row-pile concrete retaining wall depend on the type steel and high-strength bolt fastening, which has low disassembly efficiency. The present application can eliminate the interference of the waist beam cross support on the pipe installation, the sliding rail type cross support sliding block can freely displace along the length direction of the trench, when the pipe is put in, the waist beam cross support assembly at one end of the pipe trench can be moved, the pipe is inclined and hoisted into the pipe trench, the whole avoids the pipe hoisting path (the sliding rail extends to the full length of the base), and the pipe is put in. After the pipe is put in, the support can be immediately supported again; compared with the traditional fixed support disassembly which needs to clear the operation surface, the safety is higher. The hydraulic drive replaces the high-strength bolt connection, the efficiency is greatly improved, and the one-key hydraulic cross support opening and closing system is provided; the strong hydraulic cylinder is locked in three points in a line, and the risk of butt shear deformation is eliminated; the support arm folding and unfolding time is less than or equal to 2 minutes per section, which is more than 15 times higher than the traditional bolt fastening efficiency (the original time-consuming is 30 minutes per section).

[0009] Further, the limiting structure of the T-shaped sliding groove and the sliding block head is adopted between the cross support sliding block and the sliding rail, and between the base and the cross support sliding block, realizing two-dimensional free sliding.

[0010] Further, the strong hydraulic cylinder is connected by the bottom plate to form a straight line structure and is packaged in the hydraulic cylinder fixed shell; the hydraulic cylinder fixed shell is provided with coaxial positioning holes at both ends and the butt joint, and three points are locked in a straight line by the penetrating positioning pull rod. When the butt joint strong hydraulic cylinder is used to form the cross brace, it needs to be ensured that it always maintains in a straight line. Once the two strong hydraulic cylinders are inclined at a certain angle, the reaction force in the supporting process can directly destroy the cross brace into two sections. The strength of the hydraulic cylinder fixed shell and the positioning pull rod is used to ensure that the butt joint strong hydraulic cylinder always maintains in a straight line. When the two are inclined, the positioning pull rod is a rod and must be bent, so the straightness of the positioning pull rod can be checked by laser before each use, and then it is determined whether the strong hydraulic cylinder maintains in a straight line.

[0011] Further, the bottom of the tilt self-adaptive mobile chassis is provided with a caterpillar walking mechanism, and self-locking anti-skid anchor rod assemblies are installed at the front and rear ends; the anti-skid anchor rod assembly comprises a pneumatic slide plate that can be lifted along a sliding support, a drilling machine and a spiral blade type anti-skid anchor rod. When the slide rail type cross brace slider is displaced along the length of the ditch to make the waist beam cross brace avoid the pipeline hoisting path, if the transverse displacement is too large and the ditch bottom is inclined, side turning is prone to occur. However, the spiral blade type anti-skid anchor rod is directly anchored into the soil foundation at the bottom of the ditch, so side turning is not prone to occur.

[0012] Further, the positioning pull rod is evenly distributed in at least 4 groups along the circumference of the hydraulic cylinder fixed shell, and the two ends of each group of pull rods are locked by threaded nuts to form a shear-resistant surrounding structure.

[0013] Further, a ±15° deflection angle is reserved between the universal support plate and the hinge ball of the support arm to adapt to the curved surface of the ditch wall. The self-adaptive support eliminates the contact stress concentration of the ditch wall, and the universal support plate (235) is deflected ±15° in two directions; the spherical hinge (234) dynamically compensates the unevenness of the ditch wall (the face contact is still maintained under a ±12° inclination condition); the average support pressure is ≤0.5MPa (the local pressure of the traditional rigid support can reach 3.2MPa).

[0014] Further, the caterpillar walking mechanism adopts a wide-width engineering rubber caterpillar track, and the surface is provided with deep groove anti-skid teeth; the chassis frame is a plane frame welded by metal square tubes, and the bottom is connected with the caterpillar walking mechanism through an axle.

[0015] Further, the end of the support arm is connected by a spherical hinge to a universal support plate.

[0016] Further, the slide rail extends to the full length of the chassis frame along the length of the ditch, and the depth of the slide groove is greater than 1 / 2 of the diameter of the buckling wheel. The embedding depth of the buckling wheel and the deep groove slide rail is >50%, which prevents side turning out of control. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1Structure diagram of the present application; Figure 2 Structure diagram of the hydraulic cross brace of the present application. DETAILED DESCRIPTION

[0018] Further details are described below through specific embodiments: The reference signs in the drawings of the specification include: inclined adaptive mobile chassis 1, chassis frame 11, slide rail 12, slide rail groove 121, tracked walking mechanism 13, waist beam cross brace assembly 2, cross brace sliding block 21, buckling wheel 211, supporting hydraulic cylinder 22, hydraulic cylinder base 221, hydraulic cross brace 23, powerful hydraulic cylinder 231, hydraulic cylinder fixing shell 232, positioning pull rod 2321, bottom plate 2322, positioning plate 2323, supporting arm 233, hinged ball 234, fitting plate 235, self-locking anti-skid anchor rod assembly 3, sliding support 31, drilling machine 32, anti-skid anchor rod 33, level 41.

[0019] The embodiments are shown as follows: Figure 1 The present application is an adaptive multi-dimensional trench support device, which comprises an inclined adaptive mobile chassis 1, the inclined adaptive mobile chassis 1 comprises a chassis frame 11 and a tracked walking mechanism 13, and the chassis frame 11 is a planar frame welded by metal square tubes. An axle is arranged below the chassis frame 11. The tracked walking mechanism 13 is connected to the axle to form a movable vehicle frame structure. The tracked walking mechanism 13 adopts a wide engineering rubber track to increase the ground contact area, reduce the pressure on the soft soil layer at the bottom of the trench, and is provided with deep groove anti-skid teeth on the surface of the rubber track. The slide rail 12 is arranged on the upper surface of the chassis frame 11 between the two tracked walking mechanisms 13.

[0020] The self-locking anti-skid anchor rod assembly 3 is arranged at the front and rear ends of the chassis frame 11, and a mounting plate is welded on the upper surface of the chassis frame 11. The sliding support 31 in the recess section is vertically arranged on the mounting plate. The pneumatic sliding plate is slidably installed on the sliding support 31. The pneumatic sliding plate is connected to the air cylinder, and the pneumatic sliding plate and the T-shaped sliding block head provided on the side wall of the sliding support 31 are provided with T-shaped sliding grooves on the inner side of the sliding support 31. Therefore, the pneumatic sliding plate is limited by the T-shaped sliding block head on the sliding support 31, and the pneumatic sliding plate can slide up and down on the sliding support 31. The drilling machine 32 is installed on the pneumatic sliding plate, the output end of the drilling machine 32 faces the ground, and the anti-skid anchor rod 33 is installed. The anti-skid anchor rod 33 is an anchor rod with spiral blades. Under extreme slope or soft foundation, the drilling machine 32 slides downward under the driving of the pneumatic sliding plate, and drives the anti-skid anchor rod 33 to rotate into the soil layer to provide additional anti-sliding force. The longer the length of the anti-skid anchor rod 33 is, the better the anchoring effect is. Therefore, the length of the anti-skid anchor rod 33 should not be less than 1 m, and in this embodiment, the length of the anti-skid anchor rod 33 is 1.2 m.

[0021] The waist beam cross support assembly 2 is arranged above the tilt adaptive mobile chassis 1. Specifically, the cross support sliding block 21 of the waist beam cross support assembly 2 is provided with a buckling wheel 211, which can be clamped into the sliding rail groove 121 on the sliding rail 12 to form a limit, and the sliding groove depth is greater than 1 / 2 of the diameter of the buckling wheel. Therefore, the cross support sliding block 21 can slide along the sliding rail 12 in the direction of the trench length by using the buckling wheel 211. The cross support sliding block 21 itself is also a horizontal sliding table, which is slidingly connected to the sliding rail 12 at the lower end and slidingly connected to the hydraulic cylinder base 221 at the upper end. The sliding connection mode of the hydraulic cylinder base 221 and the upper end of the cross support sliding block 21 is consistent with the connection mode of the lower end of the cross support sliding block 21 and the sliding rail 12, which is a sliding connection of sliding block and sliding rail buckling. Therefore, the hydraulic cylinder base 221 can slide along the cross support sliding block 21 in a direction perpendicular to the trench length. The support hydraulic cylinder 22 is installed on the hydraulic cylinder base 221, and the upper end of the support hydraulic cylinder 22 is fixedly connected to the hydraulic cross support 23.

[0022] The hydraulic cross support 23 is driven by a pair of powerful hydraulic cylinders 231 as the main drive to realize the rapid and large-range opening and closing of the support arm 233 of the hydraulic cross support 23 to contact the trench wall for support. Since the two powerful hydraulic cylinders 231 are to be connected to form a cross support, it is necessary to ensure that the two powerful hydraulic cylinders 231 are in a straight line to avoid the shear force caused by the included angle from deforming the cross support. Therefore, in this embodiment, the two powerful hydraulic cylinders 231 are respectively mounted on the bottom plate 2322 by using bolts, and the two bottom plates 2322 are fixed together by using bolts. The two powerful hydraulic cylinders 231 are connected at the bottom to form a straight-line cross support structure. The connected powerful hydraulic cylinders 231 are installed in the hydraulic cylinder fixing shell 232, which limits the powerful hydraulic cylinders 231 to avoid deformation. It is worth noting that when the powerful hydraulic cylinders 231 are installed in the hydraulic cylinder fixing shell 232, the bottom plate 2322 corresponds to the equidistant through holes on the circumference of the hydraulic cylinder fixing shell 232. The through holes and the bottom plate 2322 are connected to the plate body structure, and the upper part of the plate body structure extends out of the through hole to form a positioning plate 2323. The positioning plates 2323 are also provided at both ends of the hydraulic cylinder fixing shell 232, and the positioning plates 2323 are provided with positioning holes. During processing or installation, the positioning holes at both ends of the hydraulic cylinder fixing shell 232 and the positioning holes formed by the extended part of the bottom plate 2322 form a three-point straight line. The positioning pull rod 2321 is used as a reference by penetrating the positioning holes at both ends of the shell and the positioning hole at the bottom. Threaded holes are provided at both ends of the positioning pull rod 2321, and the positioning pull rod 2321 is fixed in the positioning holes by using nuts. Four groups of positioning holes and pull rods can be arranged on the circumference of the hydraulic cylinder fixing shell 232 to form a surrounding positioning of the cross support, so as to ensure that the powerful hydraulic cylinders 231 are in a straight line.

[0023] The end of the piston rod 2311 of the strong hydraulic cylinder 231 is fixedly connected with a support arm 233; a universal support plate 235 is connected to the end of each support arm 233 by using a hinged ball 234, the hinged ball connection provides a certain angular freedom, which is suitable for the non-perpendicular surface of the pipeline or the ditch wall, in the embodiment, the universal support plate 235 and the hinged ball 235 of the support arm are reserved with a deflection angle of ± 15°. A pressure / displacement sensor is integrated on the universal support plate 235: the piston rod mechanism of the strong hydraulic cylinder 231 is equipped with a pressure sensor and a displacement sensor, which can real-time feedback the support force and the actual displacement, and the data is integrated into the control system to realize closed-loop control and overload protection.

[0024] The cross support sliding block 21 of the waist beam cross support assembly 2 is driven on the slide rail, and the hydraulic cylinder base 221 is driven on the cross support sliding block 21, which can be driven by a small electric push rod, a hydraulic cylinder, a gear rack or a manual crank, so as to realize the movement of the waist beam cross support assembly 2 in the ditch length direction, perpendicular to the ditch length direction, that is, the flexible positioning in the longitudinal (X-axis) and transverse (Y-axis) planes.

[0025] The above is only an embodiment of the present application, and the common knowledge of specific structures and characteristics in the scheme is not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be regarded as the protection scope of the present application, which will not affect the effect and practicality of the patent. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. An adaptive multi-dimension trench support device, comprising support retaining walls arranged along both sides of a trench, characterized in that: Also include tilt adaptive mobile chassis and tilt adaptive mobile chassis for supporting the waist beam cross support assembly of supporting retaining wall, the upper surface of the tilt adaptive mobile chassis is provided with slide rail along the length of the ditch; The waist beam cross support assembly contains cross support slider, support hydraulic cylinder and hydraulic cross support; The cross support slider is matched with the slide groove on the slide rail through the buckling wheel, so that the waist beam cross support assembly can slide along the length of the ditch; The base of the support hydraulic cylinder is connected with the upper end of the cross support slider, so that the hydraulic cross support can adjust the support width perpendicular to the length of the ditch; The hydraulic cross support is driven by a pair of strong hydraulic cylinders to open and close the support arm, realizing adaptive support and rapid folding.

2. The self-adapting multi-dimension duct support device according to claim 1, wherein: The limit structure of T-shaped slide groove and slider head is adopted between the cross support slider and the slide rail, and between the base and the cross support slider, to realize two-dimensional freedom sliding.

3. The self-adapting multi-dimension duct support device according to claim 1, wherein: The strong hydraulic cylinder is connected by the bottom plate to form a linear structure, and is packaged in the hydraulic cylinder fixed shell; The hydraulic cylinder fixed shell is provided with coaxial positioning holes at both ends and the butt joint, and the three points are collinear by the through positioning pull rod.

4. The self-adapting multidimensional duct support apparatus of claim 1, wherein: The bottom of the tilt adaptive mobile chassis is provided with a caterpillar walking mechanism, and self-locking anti-skid anchor rod assemblies are installed at the front and rear ends thereof; The anti-skid anchor rod assembly contains a pneumatic slide plate which can be lifted along the slide bracket, a drilling machine and a spiral blade type anti-skid anchor rod.

5. The self-adapting multidimensional conduit support apparatus of claim 1, wherein: The positioning pull rod is uniformly distributed in at least 4 groups around the hydraulic cylinder fixed shell, and the ends of each pull rod are locked by threaded nuts, forming a shear-resistant surrounding structure.

6. The self-adapting multi-dimension trench support apparatus of claim 1, wherein: The hinge ball between the universal support plate and the support arm is reserved with a deflection angle of ± 15°, which is suitable for the curved surface of the ditch wall.

7. The self-adapting multi-dimension trench support apparatus of claim 1, wherein: The caterpillar walking mechanism adopts wide engineering rubber caterpillar, and the surface is provided with deep anti-skid teeth; The chassis frame is a plane frame welded by metal square tubes, and the bottom is installed on the caterpillar walking mechanism through an axle.

8. The self-adapting multi-dimension trench support apparatus of claim 1, wherein: The end of the support arm is connected by a spherical hinge by a universal support plate.

9. The self-adapting multidimensional conduit support apparatus of claim 1, wherein: The slide rail extends to the full length of the chassis frame along the length of the ditch, and the depth of the slide groove is greater than 1 / 2 of the diameter of the buckling wheel.

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