CN219343221U

CN219343221U - Single limb leg adjustable end device supported in steel pipe

Info

Publication number: CN219343221U
Application number: CN202320145422.2U
Authority: CN
Inventors: 曾令江; 彭宏; 庞晓君; 黄广扬; 何绿娃; 潘鹏凯; 白春浩; 庞钦
Original assignee: Guangzhou Engineering Contractor Group Co Ltd
Current assignee: Guangzhou Engineering Contractor Group Co Ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-07-14
Anticipated expiration: 2033-02-07

Abstract

The utility model provides a single limb leg movable end device supported in a steel pipe, and belongs to the field of building equipment. The single limb leg adjustable end device supported in the steel pipe consists of a left end plate, a clamping plate, a left jack tray, a right jack tray, a cone wedge seat, a right end plate and a steel support short joint section. Compared with the prior art, the utility model has the characteristics of uniform stress, better bearing capacity, good torsion resistance, large rigidity, high stability and good integrity.

Description

Single limb leg adjustable end device supported in steel pipe

Technical Field

The utility model belongs to the field of building equipment, and particularly relates to a single-leg movable end device supported in a steel pipe.

Background

The steel support is used as an assembled structure, is light in weight, easy to hoist, high in control level of manufacturing works in factories, high in construction speed, easy to dismantle, recoverable, high in economical efficiency and wide in application. However, the foundation pit engineering steel support structure has some local weakening problems and several factors have different degrees of influence on the bearing capacity and the safety of the foundation pit engineering steel support structure. For example:

1. the traditional steel support adopts a jack to adjust the length of the movable end of the steel support and uses a steel wedge block for limiting, and the steel wedge block is easy to slide and fall off due to small contact area, so that poor structural integrity, loose structure, forced contact of a steel wedge point, compressed plastic area, abrupt change of the cross section of the steel wedge block, small cross section of the movable end, poor bending resistance and unfixed field manufacturing are easily caused, and the steel support is easy to damage and becomes a risk point in engineering accidents.

2. The traditional steel support loose end has smaller local stress area, the main stress component is a steel wedge block, the stress is concentrated, the stress is larger, the rest part of the whole steel support structure is not effectively utilized, and the steel wedge loose end is a local weak link in the assembled structure.

3. The foundation pit engineering needs to use a steel support structure, which is generally a large-risk engineering or a large-risk engineering exceeding a certain scale, and once the steel support is damaged, the whole foundation pit is collapsed, so that the consequence is serious.

In view of the above, the utility model provides a single limb leg movable end device supported in a steel pipe and a construction method thereof.

Disclosure of Invention

In order to solve the problems, the utility model provides a single limb leg adjustable end device supported in a steel pipe, which has the characteristics of uniform stress, good bearing capacity, good torsion resistance, high rigidity, high stability and good integrity.

The utility model is realized by the following technical scheme:

the utility model provides a single limb leg loose end device of steel pipe internal support, includes left end plate, splint, left jack tray, right jack tray, awl wedge seat, right end plate and steel support short circuit section, left jack tray and right jack tray all are provided with two, left jack tray left end plate fixed connection, right jack tray with right end plate fixed connection, left jack tray and right jack tray set up relatively, left jack tray and right jack tray are semi-circular shape, left end plate rear is provided with the splint fixed plate, be provided with smooth round bar on the splint fixed plate, splint with smooth round bar sliding connection, splint comprise punch holder and lower plate, punch holder and lower plate all include concave groove and edge of a wing, the outside of concave groove and edge of a wing is provided with the stiffening rib, be provided with the hole in the hole, be provided with the cushion between high strength bolt and the edge of a wing, punch holder and lower plate form the clamp plate fixed plate, wedge seat and awl seat are cut into with wedge seat, the angle is held in the wedge seat is held in the palm with the taper seat through wedge seat, the isosceles trapezoid shape is held in advance, and is connected with the wedge seat is fixed to the wedge seat.

As a preferable technical scheme, the left end plate has the length of 500mm-800mm, the width of 300mm-500mm and the thickness of 15mm-30mm; the right end plate has a length of 440mm-740mm, a width of 300mm-480mm and a thickness of 15mm-30mm.

As a preferable technical scheme, the thickness of the left jack tray is 4mm-10mm, the length is 150mm-300mm, and the semicircular diameter is 150mm-300mm; the thickness of the right jack tray is 4mm-10mm, the length is 150mm-300mm, and the semicircular diameter is 154mm-310mm.

As a preferable technical scheme, the length of the high-strength bolt is 200mm-280mm, and the diameter is 20mm-36mm.

As a preferable technical scheme, the length of the smooth round rod is 200mm-280mm, and the diameter is 18mm-30mm.

As a preferable technical scheme, the length of the cushion block is 40mm-60mm, the width of the cushion block is 35mm-50mm, the thickness of the cushion block is 10mm, and the inclined section inclination angle is 70 degrees to 80 degrees.

As a preferable technical scheme, the clamping plate fixing plate is in a cuboid shape, the length of the clamping plate fixing block is 130-320 mm, the width of the clamping plate fixing block is 40-80 mm, and the thickness of the clamping plate fixing block is 20-30 mm.

As a preferable technical scheme, the middle parts of the upper clamping plate and the lower clamping plate are provided with concave grooves, the section width of each concave groove is 50mm-200mm, the depth is 20mm-30mm, the thickness of each concave groove is 20mm-30mm, the flange thicknesses of two sides of each concave groove are 20mm-30mm, the diameter of each hole is 12mm-30mm, and the thickness of each stiffening rib is 4mm-10mm.

As a preferable technical scheme, the conical wedge seat is a quadrangular frustum pyramid, the vertical section shape is an isosceles trapezoid, the upper bottom width of the conical wedge seat is 40-120 mm, the lower bottom width is 200-320 mm, and the thickness of the conical wedge seat is 50-200 mm.

A construction method of a single limb leg adjustable end device supported in a steel pipe,

the construction method comprises the following steps of,

step 1: manufacturing a conical wedge seat side: the cone wedge seat is made of Q390 steel by adopting a casting process, a steel plate with the thickness of 80mm is cut into a shape with an isosceles trapezoid side surface, the width of the upper bottom is 120mm, the width of the lower bottom is 280mm, and the steel plate is welded on the center of the right end plate; the right jack tray is cut into a semicircular shape by adopting a steel pipe with the length of 5mm and the length of 300mm, and then the manufactured right jack tray is symmetrically welded on the right end plate at two sides of the conical wedge seat;

step 2: and (3) manufacturing a clamping plate side: the clamping plates are manufactured by adopting Q390 steel by adopting a casting process, the included angle between the upper clamping plate and the lower clamping plate is 166 degrees, the middle of the upper clamping plate and the lower clamping plate is provided with a groove, the section width of the groove is 80mm, the depth is 30mm, the thickness is 20mm, then four holes are respectively formed on the two flanges of the groove of the upper clamping plate and the lower clamping plate, the diameters of the holes are 16mm, stiffening ribs are welded between the two holes on each side, the thickness of each stiffening rib is 6mm, and the stiffening ribs are vertically welded on the outer wall of the groove and the flanges; two flanges at the lower part are respectively provided with a hole, the middle of the concave groove at the lower part is provided with a hole, and the sizes of the holes are 20mm;

step 3: manufacturing high-strength bolts, smooth round bars and cushion blocks: the high-strength bolts at the upper part of the clamping plate are made of 10.9-grade M16 high-strength bolts, the lengths of the high-strength bolts are 210mm, 240mm, 270mm and 300mm respectively, the smooth round rod is made of Q345, and the length of the smooth round rod is 245mm; the plane size of the cushion block is 40mm 35mm, the minimum thickness is 10mm, the maximum thickness is 20.72mm, the inclined side face inclination angle is 75 degrees, and a hole with the diameter of 20mm is formed in the middle of the cushion block;

step 4: the cone wedge seat side is assembled with the clamping plate side: embedding the cone wedge seat into the upper clamping plate and the lower clamping plate, enabling the whole movable end to be in the shortest state, enabling the length of a high-strength bolt close to the left end plate to be 210mm, enabling the length of a high-strength bolt close to the right end plate to be 300mm, respectively connecting the upper clamping plate and the lower clamping plate with the cone wedge seat through high-strength bolts with different lengths, and screwing nuts;

step 5: transporting the assembled loose end to the site, concentrically welding the right end plate and the steel support short-circuit section, and then carrying out flange connection on the steel pipe support and the steel support short-circuit section to form a whole;

step 6: the steel support is integrally lifted into a pit to be in place, two ends of the steel support are placed on pre-buried trays on the enclosing purlin, the fixed end is closely attached to the enclosing purlin, and a gap is reserved between one end of the movable end and the enclosing purlin and used for applying prestress to the movable end to adjust the length;

step 7: the hydraulic jack is placed on a left jack tray and a right jack tray, the hydraulic jack stretches, the movable road end head of the supporting top stretches until the gap between the end plate and the enclosing purlin is eliminated, the whole stretching process is required to be completed quickly and uniformly, and is completed for 2-3 times, after each stretching, four high-strength bolts are screwed along with the hydraulic jack, and because axial prestress is not loaded, the high-strength bolts are screwed to the contact surface of the clamping plate and the conical wedge seat for close contact;

step 8: after the gap between the end plate and the enclosing purlin is filled, the hydraulic jack is continuously pressurized, axial prestress is applied in three stages, all high-strength bolts are fastened once at each stage, and the contact surface between the clamping plate and the conical wedge seat is ensured. The requirement of pre-adding axial force is met, the pressurization is stopped, the pressure of the oil gauge is maintained, high-strength bolts at the movable end are fastened to the tightening moment one by one, so that the clamping plate is tightly attached to the conical wedge seat clamp, and finally, the jack is removed, so that the movable end is in a normal working state.

The beneficial effects are that:

1. the utility model avoids the stress concentration of the traditional steel support movable end, fully distributes the stress to the inclined joint surface where the clamping plate is in contact with the conical wedge seat, converts the 'point' contact stress into the surface contact stress, and fully utilizes the action of each component;

2. the concave groove of the middle concave part of the clamping plate is in nested sliding connection with the middle of the conical wedge seat, so that the contact surfaces are prevented from being staggered, the contact surfaces can be always kept to be in surface contact stress, meanwhile, the engagement sliding connection mode can bear bending-resistant and torque-resistant acting forces, and the overall stress performance of the movable end is improved;

3. each connecting part of the movable end is connected in an assembly mode, the weight is light, and the movable end is easy to assemble and disassemble on site;

4. according to the requirements of on-site stress and length adjustment, the angle of the inclined contact surface of the conical wedge seat and the number of high-strength bolt holes on the clamping plate can be adjusted to manufacture the adjustable ends of different types, so that the construction requirements are met, and compared with the steel wedge type adjustable ends, the assembled steel support single-leg adjustable end device has the advantages of less steel consumption, low manufacturing cost and good application prospect under the condition of the same bearing capacity.

Drawings

FIG. 1 is a top view of a single leg adjustable end device supported in a steel tube;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a perspective view of the splint;

fig. 4 is a schematic structural view of the conical wedge base.

The attached drawings are identified:

1. a left end plate; 2. a left jack tray; 3. a high-strength bolt; 4. a cushion block; 5. a clamping plate; 6. a right jack tray; 7. a right end plate; 8. stiffening ribs; 9. a smooth round bar; 10. a conical wedge seat; 11. a steel support short-circuit section; 12. a clamping plate fixing plate; 13. a concave groove; 14. a flange; 15. an upper clamping plate; 16. and a lower clamping plate.

Detailed Description

In order to further disclose the technical scheme of the utility model, a single leg adjustable end device supported in the steel pipe is clearly and completely described below by combining the accompanying drawings.

The terms "inner", "middle" and "a" and the like are used in the present specification for convenience of description, but are not intended to limit the scope of the present utility model, and the changes or modifications of the relative relationship are described in the foregoing description without any substantial change of technical content.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

Examples:

referring to fig. 1 to 4, the utility model provides a single limb leg loose end device supported in a steel pipe, which comprises a left end plate 1, a clamping plate 5, a left jack tray 2, a right jack tray 6, a conical wedge seat 10, a right end plate 7 and a steel support short joint section 11, wherein the left jack tray 2 and the right jack tray 6 are respectively provided with two, the left end plate 1 of the left jack tray 2 is fixedly connected, the right jack tray 6 is fixedly connected with the right end plate 7, the left jack tray 2 and the right jack tray 6 are oppositely arranged, a clamping plate fixing plate 12 is arranged at the rear of the left end plate 1, a smooth round rod 9 is arranged on the clamping plate fixing plate 12, the clamping plate 5 is in sliding connection with the smooth round rod 9, the clamping plate 5 is composed of an upper clamping plate 15 and a lower clamping plate 16, the upper clamping plate 15 and the lower clamping plate 16 respectively comprise a concave groove 13 and a flange 14, the right clamping plate is fixedly connected with the flange 6, the flange 6 is fixedly connected with the conical wedge seat 10 through the wedge seat 10, the clamping seat 10 is movably sleeved with the conical wedge seat 10, and the flange seat 10 is fixedly connected with the conical wedge seat 10 through a high-strength bolt seat 10, and the clamping angle between the wedge seat 10 is formed by the wedge seat 10 and the wedge seat 10.

The utility model also provides a construction method of the single limb leg movable end device supported in the steel pipe,

the construction method comprises the following steps of,

The present utility model is not limited to the above-described embodiments, but, if various modifications or variations of the present utility model are not departing from the spirit and scope of the present utility model, the present utility model also includes such modifications and variations provided they fall within the scope of the claims and the equivalents thereof.

Claims

1. The utility model provides a single limb leg activity end device of support in steel pipe which characterized in that: comprises a left end plate, clamping plates, a left jack tray, a right jack tray, cone wedge seats, a right end plate and a steel support short joint section, wherein the left jack tray and the right jack tray are both provided with two, the left jack tray is fixedly connected with the left end plate, the right jack tray is fixedly connected with the right end plate, the left jack tray and the right jack tray are oppositely arranged, the left jack tray and the right jack tray are in semicircular shapes, the rear part of the left end plate is provided with a clamping plate fixing plate, the clamping plate fixing plate is provided with a smooth round rod, the clamping plate is in sliding connection with the smooth round rod, the clamping plate consists of an upper clamping plate and a lower clamping plate, the upper clamping plate and the lower clamping plate comprise concave grooves and flanges, stiffening ribs are arranged on the outer sides of the concave grooves and the flanges, holes are formed in the flanges, high-strength bolts are arranged in the holes, a cushion block is arranged between the high-strength bolts and the flanges, the upper clamping plate and the lower clamping plate form an included angle and are locked through the high-strength bolts, the cone wedge seat is fixedly connected with the right end plate, the cone wedge seat is fixedly connected with the steel support short-circuit section, the cone wedge seat is isosceles trapezoid, the cone wedge seat is movably embedded with the concave grooves, and is clamped after being nested with the cone wedge seat through the concave grooves formed in the clamping plates, so that the cone wedge seat bears and transmits the axial force of the steel support short-circuit section.

2. The single limb loose end device supported in the steel tube according to claim 1, wherein: the length of the left end plate is 500mm-800mm, the width is 300mm-500mm, and the thickness is 15mm-30mm; the right end plate has a length of 440mm-740mm, a width of 300mm-480mm and a thickness of 15mm-30mm.

3. The single limb loose end device supported in the steel tube according to claim 1, wherein: the thickness of the left jack tray is 4mm-10mm, the length is 150mm-300mm, and the semicircular diameter is 150mm-300mm; the thickness of the right jack tray is 4mm-10mm, the length is 150mm-300mm, and the semicircular diameter is 154mm-310mm.

4. The single limb loose end device supported in the steel tube according to claim 1, wherein: the length of the high-strength bolt is 200mm-280mm, and the diameter of the high-strength bolt is 20mm-36mm.

5. The single limb loose end device supported in the steel tube according to claim 1, wherein: the length of the smooth round rod is 200mm-280mm, and the diameter is 18mm-30mm.

6. The single limb loose end device supported in the steel tube according to claim 1, wherein: the length of the cushion block is 40mm-60mm, the width is 35mm-50mm, the thickness is 10mm, and the inclined section inclination angle is 70 degrees-80 degrees.

7. The single limb loose end device supported in the steel tube according to claim 1, wherein: the clamping plate fixing plate is cuboid, the length of the clamping plate fixing block is 130-320 mm, the width of the clamping plate fixing block is 40-80 mm, and the thickness of the clamping plate fixing block is 20-30 mm.

8. The single limb loose end device supported in the steel tube according to claim 1, wherein: the middle parts of the upper clamping plate and the lower clamping plate form concave grooves, the section width of each concave groove is 50mm-200mm, the depth of each concave groove is 20mm-30mm, the thickness of each concave groove is 20mm-30mm, the flange thicknesses of two sides of each concave groove are 20mm-30mm, the diameter of each hole is 12mm-30mm, and the thickness of each stiffening rib is 4mm-10mm.

9. The single limb loose end device supported in the steel tube according to claim 1, wherein: the conical wedge seat is a quadrangular frustum pyramid, the vertical section shape is an isosceles trapezoid, the upper bottom width of the conical wedge seat is 40-120 mm, the lower bottom width of the conical wedge seat is 200-320 mm, and the thickness of the conical wedge seat is 50-200 mm.