WO2019075770A1

WO2019075770A1 - Inner arched underpinning beam device

Info

Publication number: WO2019075770A1
Application number: PCT/CN2017/108009
Authority: WO
Inventors: 欧阳甘霖; 欧阳牧虎; 曲丽香; 詹佳玉; 卿斌; 李菁红
Original assignee: 青岛静力工程股份有限公司; 欧阳甘霖
Priority date: 2017-10-17
Filing date: 2017-10-27
Publication date: 2019-04-25
Also published as: CN107869257A; CN107869257B

Abstract

Disclosed is an inner arched underpinning beam device, comprising a guide pipe (1), a hollow beam (5), an inner arch, a track, an oil cylinder and an adjustable oil cylinder bracket, wherein the guide pipe (1) comprises a plurality of segments of hollow circular pipes or rectangular pipes which are in coaxially abutting joint with one another in sequence; the inner arch is arranged in the hollow beam (5); the hollow beam (5) is installed in the guide pipe (1) which horizontally penetrates a lower part of a building foundation, and soil in the guide pipe is completely removed; and the inner arch and the hollow beam (5) constitute an underpinning beam. The inner arched underpinning beam has a small bending moment, so that the bearing capacity is greatly improved, and the deformation amount of a building above to be underpinned is small, and soil mass is not required to be excavated before the underpinning beam is placed, which is safe and reliable.

Description

Inner arched beam changing device

Technical field

The invention belongs to the field of underground space development. An inner arched beam changing device for squeezing horizontally from a suitable location under the existing building foundation to achieve overall replacement of the building.

Background technique

The implementation of the exemption of underground space under the existing buildings is inseparable from the underpinning technology. At present, whether it is active or passive, various underpinning technologies are inseparable from the practice of setting up the replacement mechanism after taking the soil first. This method is difficult to construct and technically difficult, which makes the building structure prone to deformation or even tilting and collapse accidents, and the cost is high and the construction period is long. Generally, the residents are required to move out before the construction, which is the underground space of the existing building. Development brings additional difficulties. These factors have become technical bottlenecks restricting the development of large-scale underground space in urban centers and existing communities in China.

Summary of the invention

In order to overcome the deficiencies of the prior art, the present invention provides an inner arch-shaped underpinning beam device that does not require excavation and borrowing. The technical solution of the present invention is:

An inner arch-shaped beam changing device comprises a duct, a hollow beam, an inner arch, a rail, a cylinder and a regulating cylinder bracket, wherein the duct comprises a plurality of hollow coaxial tubes or rectangular tubes which are coaxially butted in sequence, The inner arch is placed in a hollow beam, and the hollow beam is installed and has been pushed through In the duct of the building foundation and the inner soil is cleaned, the inner arch and the hollow beam form a supporting beam; the top surface of the guiding rail of the rail is formed to adapt to the shape of the hollow beam, and the cylinder is installed in On the adjusting cylinder bracket, the front end of the piston rod of the cylinder is spherically connected with the balance frame which is set on the outer end surface of the duct or the hollow beam, and the two hollow round tubes or the rectangular tube adjacent to the front and rear are butt-inserted and butted, one hollow The end of the round tube or the rectangular tube is provided with an outer shoulder, and the end of the other hollow tube or rectangular tube is provided with an inner shoulder that cooperates with the outer shoulder, the inner shoulder and the outer shoulder Each of which is provided with a sloped surface and an erected surface forming an angle with the inclined surface, the inner shoulder and the outer shoulder are abutted against each other, wherein the outer shoulder and the inner shoulder are on the front side, and the outer shoulder and the inner convex Sealing grooves are provided on the inclined faces of the shoulders, and sealing strips are installed in each of the sealing grooves.

The hollow beam comprises a plurality of coaxially disposed, and sequentially connected beam segments, flanges are arranged at the ends of each of the beam segments, and flanges of two adjacent beam segments are connected by bolts or rivets, and the plurality of segments are connected The segments are combined into a hollow beam horizontally passing through the foundation of the building and having both ends mounted on the top of the underground continuous wall. A tensile plate is arranged at the bottom of the inner wall of the hollow beam, and the tensile plate is fixed to the hollow beam by rivets or welding.

The hollow circular tube or the rectangular tube section is horizontally squeezed into the soil layer of a predetermined depth under the foundation of the building until the plurality of hollow circular tubes or rectangular tubes are combined into a conduit passing through the foundation of the building and the overall length is greater than the traversed building The base width is stopped; the outer section of the hollow beam is made into a matching circular section or rectangular section as well as the inner section of the duct.

The inner arch comprises an arch rib, an arch chord and a beam pier, and a plurality of arch ribs are arranged along the long direction in the hollow beam, the arch rib is welded by a plurality of arc-shaped steel pipes in turn, and the non-shrinkage concrete filling is poured in the curved steel pipe. Formed after compaction; the top of the arch rib is offset from the top of the hollow beam, each An arch is formed at the lower end of the arch rib at the contact with the beam pier, each arch is supported on the inner side of the corresponding beam pier and welded with the beam pier; an arch string is arranged between the two arches of each arch rib The arch string is a circular steel pipe or a steel cable. After the two ends of the arch string pass through the corresponding two arches, a pre-stress is applied to the outer side of the arch to lock and lock; the beam pier is fixed in the lower part of the hollow beam. On the tensile plate, the arch chord is disposed at the two ends of the arch rib adjacent to the top of the beam pier, and the abutting surface of the beam pier and the arch foot is a matching arc surface for the curved outer side of the arched ends of the arch rib Close to the curved side of the beam pier, the beam pier and the tensile plate are fixed by rivets or welding, and the arch ribs, the beam pier and the arch chord jointly bear the load transferred from the upper part; the beam pier and the arch string also bear the transmission of the arch rib Horizontal stress.

The rail comprises an inverted T-shaped rail guide, a support, a guide frame, a longitudinal connecting shaft, a transverse connecting shaft and a rail guiding bottom plate, wherein the inverted T-shaped rail is guided in two rows, arranged parallel to each other, and forming a spacing; Rolling running front and rear guide wheels are mounted on each inverted T-shaped rail guide, and rolling bearings are mounted in the front and rear guide wheels, and the front guide wheels and rear on the same inverted T-shaped rail guide The guide wheels are connected by a longitudinal connecting shaft, and the front guide wheel and the rear guide wheel are mounted on the rolling bearing through the shaft pin, and the two ends of the shaft pin are supported on the two side walls of the lower part of the support, the front guide wheel and the rear guide wheel When the rolling bearing is rolling in the support, the resistance becomes small, and the guide frame is installed on the upper part of each support; wherein the guide frame of the front guide wheel on one of the inverted T-shaped guides is inverted with the corresponding other column The guide rails of the front guide wheels on the rail guide are connected by a transverse connecting shaft; the guide brackets of the rear guide wheels on one of the inverted T-shaped rail guides and the rear guide wheels on the other inverted inverted T-shaped rail guides The guide frames are also connected by a transverse connecting shaft, and the inverted T-shaped rail is turned on. A bolt guide mounted on the bottom rail.

The outer side surfaces of the front guide wheel and the rear guide wheel are each provided with a single-sided flange, and the single side The inner side of the flange coincides with the outer side of the inverted T-shaped rail guide.

The adjustable cylinder bracket comprises a plurality of columns, a beam, a lateral adjustment device and a vertical adjustment device, wherein the spacing between the plurality of columns is uniform, and a plurality of beams are arranged between the adjacent two columns, and the edges of the beams are arranged The vertical direction is evenly spaced, and the cross member is provided with a cylinder fixing seat for preventing the cylinder from rolling when the cylinder is lying. The cylinder fixing seat includes an upper curved valve and a lower curved flap that abuts the upper curved valve. The curved flap and the lower curved flap are connected by bolts to form a through hole for accommodating the oil cylinder. By tightening the bolt, the inner diameter of the through hole of the combination of the upper curved flap and the lower curved flap is reduced, and the cylinder is locked in the cylinder fixing seat and cannot be rotated. The column is provided with a vertical adjusting device, and the beam is provided with a lateral adjusting device, and the lateral adjusting device comprises a sliding seat disposed at the bottom of the lower curved valve, the sliding seat is slidingly mounted on the beam In the convex groove, an adjusting screw mounting seat is further disposed on the inner side wall of the beam on one side of the lower curved flap, and the adjusting screw mounting seat is provided with a U-shaped groove; for the mounting side of the outermost cylinder fixing seat The formula is: one end of the adjusting screw is installed on the outermost cylinder fixing seat, and the other end enters the U-shaped groove of the adjusting screw mounting seat corresponding to the adjusting screw in the horizontal direction, and is screwed into the adjusting nut in the U-shaped groove. When the adjusting nut or the outer end rectangular head of the adjusting screw is rotated forward and backward, since the nut is restricted by the wall of the U-shaped groove, only the adjusting screw can be linearly moved along the adjusting nut to pull the outermost cylinder fixing seat. Shifting accordingly, so as to adjust the corresponding position of the cylinder located on the outermost cylinder holder; for the two adjacent cylinder holders in the middle, the installation method is: connecting the two ends of the adjustment screw to the adjacent two cylinder holders The middle portion of the adjusting screw passes through the U-shaped groove of the adjusting screw mounting seat corresponding to the adjusting screw, and is screwed into the adjusting nut in the U-shaped groove, and the nut is rotated by the forward and reverse rotation, thereby driving the adjacent two-sided oil cylinders. The fixed seats are opposite or opposite each other, The purpose of adjusting the cylinder spacing is achieved.

Each of the columns comprises a plurality of unit columns, the plurality of unit columns are sequentially installed, and the whole is arranged in a vertical direction, and the vertical adjusting device comprises an inner sleeve of 30-500 mm long welded on the upper inner wall of the lower unit column. The lower part of the upper unit column is welded with a screw matching the inner sleeve thread, the screw is made of hollow steel tube, the lower part of the screw is screwed into the inner sleeve of the lower unit column, and the upper part of the screw is manually rotated, and the screw is welded to the lower unit. The inner sleeve of the column forms a threaded bevel movement, and the screw and the inner sleeve are respectively fixed on the lower unit column and the upper unit column, and then converted into the upper unit column to move vertically, so as to meet the adjustment of the vertical dimension; The bottom of the lowermost unit column is provided with a support, and the top of the support is in spherical contact with the bottom of the column.

The invention has the advantages that the inner arch-shaped beam-changing beam device of the invention belongs to the outer peripheral position of a certain distance from the building, and uses the static pressure underground continuous wall as a reaction force to horizontally squeeze into a plurality of inner arches. The beam-changing device will replace the existing building as a whole, and then enter the underside of the existing building to excavate the soil and construct the underground space. This can effectively avoid the displacement of the upper building caused by the soil loss caused by excavation in the existing building underpinning process, and can maintain the scale of the underground space of the existing building without the residents relocating and being safe and secure. Sex development application.

Specifically:

1. Compared with the traditional supporting beam under the same conditions, the bearing capacity is greatly improved.

2. Due to the small bending moment of the arch-shaped supporting beam, the amount of deformation of the upper building that is replaced is very small, which is conducive to safety.

3. When inserting the supporting beam, it is not necessary to excavate the soil in advance, which is safe, reliable and convenient to construct. A clear advantage in saving resources. It is expected to be one of the preferred devices for the development of underground space in existing buildings and urban densely populated areas;

4. Although the adjustable cylinder bracket is simple, it can maximize the requirements of hollow beams and conduits with different spacing dimensions, and can be reused to save resources.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of a carrier beam of the present invention.

Figure 2 is a cross-sectional view (B-B) of the first embodiment of Figure 1.

Figure 3 is a cross-sectional view (B'-B') of the second embodiment of Figure 1.

Figure 4 is a plan view of the rail guide of the present invention.

Fig. 5 is a cross-sectional view taken along line C-C of Fig. 4;

Fig. 6 is a cross-sectional view taken along line A-A of Fig. 5;

Figure 7 is a right side view of Figure 4.

Figure 8 is a front elevational view of a rectangular balance frame.

Fig. 9 is a cross-sectional view taken along line D-D of Fig. 8;

Figure 10 is a cross-sectional view of a circular balance frame.

Figure 11 is a right side view of Figure 10.

Figure 12 is a cross-sectional view of the inner shoulder and outer shoulder of the catheter of the present invention.

Figure 13 is a front elevational view of the adjustable cylinder bracket.

Figure 14 is a side view of Figure 13 .

Figure 15 is an enlarged view of the portion P of Figure 14.

Figure 16 is a plan view of Figure 13 (rotated 90 degrees clockwise).

Figure 17 is an enlarged view of a U-shaped groove.

Detailed ways

The invention will be further described in conjunction with the specific embodiments, and the advantages and features of the invention will become more apparent. However, these examples are merely exemplary and do not constitute any limitation on the scope of the invention. It should be understood by those skilled in the art that the details and the details of the present invention may be modified or substituted without departing from the spirit and scope of the invention.

Referring to Figures 1 to 17, the present invention relates to an inner arch-shaped beam changing device comprising a duct 1, a hollow beam 5, an inner arch, a rail 15, a cylinder and a regulating cylinder bracket, the duct 1 comprising a plurality of sections a coaxially butted hollow circular tube or a rectangular tube, the inner arch is disposed in a hollow beam, and the hollow beam 5 is installed in a conduit 1 that has been extruded through the foundation of the building and the internal soil is cleaned. The inner arch and the hollow beam 5 constitute a supporting beam; the top surface of the guiding frame 20 of the rail 15 is shaped to fit the hollow beam 5, and the cylinder is mounted on the adjusting cylinder bracket, the cylinder The front end of the piston rod is spherically connected with the balance frame set on the outer end surface of the duct or the hollow beam, and the front and rear sides of the two hollow round tubes or the rectangular tube are butt-inserted, and the end of a hollow tube or a rectangular tube is provided. The outer shoulder 2, the corresponding end of another hollow tube or rectangular tube is provided with an inner shoulder 3 which cooperates with the outer shoulder 2, and the inner shoulder 3 and the outer shoulder 2 are provided with a slope and An erecting surface forming an angle with the inclined surface, the inner shoulder and the outer shoulder being abutted against each other, The sealing groove 4 is disposed on the front surface of the outer shoulder 2 and the inner shoulder 3, and the inclined surface of the outer shoulder and the inner shoulder, and a sealing strip is installed in each sealing groove 4.

The hollow beam comprises a plurality of sections of coaxial arrangement, and the beam sections 6 are connected in sequence, in each section of the beam The end of the segment 6 is provided with a flange 7, the flanges 7 of two adjacent beam segments 6 are connected by bolts or rivets, and the multi-segment beam segments 6 are combined horizontally across the building foundation and both ends are mounted on the top of the underground continuous wall. The hollow beam is provided with a tensile plate 8 at the bottom of the inner wall of the hollow beam, and the tensile plate 8 is fixed to the hollow beam by rivets or welding to increase the bending deformation strength of the hollow beam 5.

As shown in FIG. 2, FIG. 10 and FIG. 11, the duct is formed by butting a plurality of hollow tubes, and the cross section of the beam section 6 is matched with the hollow tube, and is also arranged in a circular shape, and the end of the beam section 6 is The flange is a circular flange, and the bottom of the tensile plate 8 is provided with an arc-shaped bottom plate 11 which is matched with the inner diameter of the beam section, and the beam section 6, the tensile plate 8 and the curved bottom plate 11 are fixedly connected by bolts; The balance frame at this time is a circular balance frame, and the balance frame 36 is provided with an embedded shoulder 37 at the contact point of the conduit 1, and the size thereof is matched with the thickness of the four walls of the corresponding conduit 1 embedded therein, and the wall end surface of the conduit 1 can be smoothly embedded. Shoulder 37.

As shown in FIG. 8 and FIG. 9, the duct is formed by abutting a plurality of rectangular tubes. The section of the beam section 6 is matched with a rectangular tube, and the flange of the end of the beam section 6 is a rectangular flange. The box is a rectangular balance box.

The inner arch comprises an arch rib 12, an arch chord 13 and a beam pier 10. The arch rib 12 is longitudinally arranged in the hollow beam, and the arch rib 12 is welded by a plurality of arc-shaped steel pipes in turn, in the curved steel pipe. Formed after pouring without shrinkage concrete; the top and bottom of the rib 12 The tops of the core beams 5 abut each other, and the lower ends of each of the arch ribs 12 form abutment 14 at the contact with the beam pier 10. Each arch 14 is supported on the inner side of the corresponding beam pier 10 and welded to the beam pier 10; An arch chord 13 is disposed between the two arches 14 of each arch rib. The arch string 13 is a circular steel pipe or a steel cable. The two ends of the arch string 13 pass through the corresponding two arches 14 and are at the arch 14 The outer side surface is prestressed to be locked and zippered; the beam pier 10 is fixed on the tensile plate 8 at the lower part of the hollow beam 5, and the arch string 13 is disposed at the top of the arch rib adjacent to the top of the beam pier 10, the beam pier 10, the abutting surface of the arch 14 is a matching arc surface, so that the curved outer side of the arch 14 at both ends of the arch rib 12 abuts against the curved side of the beam pier 10, and the pier 10 and the tensile plate 8 are rivets Or welding to fix, the arch rib 12, the beam pier 10 and the arch chord 13 jointly bear the load displaced from the upper part; the beam pier 10 and the arch string 13 also bear the horizontal stress transmitted by the arch rib.

The track rail includes an inverted T-shaped rail guide 16, a support 19, a guide frame 20, a longitudinal connecting shaft 21, a transverse connecting shaft 22 and a rail guide bottom plate 23, and the inverted T-shaped rail guides 16 are in two rows, mutually Parallelly disposed, and forming a pitch; a rolling front and rear guide wheels 17 are mounted on each inverted T-shaped rail guide 16, and rolling bearings are mounted in the front and rear guide wheels 17, respectively. The front guide wheel and the rear guide wheel on the rail guide 16 are connected by a longitudinal connecting shaft 21, and the front guide wheel and the rear guide wheel are mounted on the rolling bearing through the axle pin, and the two ends of the axle pin 50 are supported on the support 19 On the lower two side walls, the front guide wheel and the rear guide wheel are less resistant when rolling in the support 19 by the rolling bearing, and the guide frame 20 is mounted on the upper portion of each of the supports 19; one of the inverted T-shaped rails The guide frame of the front guide wheel on the guide 16 is connected to the guide frame of the front guide wheel on the corresponding other inverted T-shaped rail guide by a transverse connecting shaft 21; one of the rear guide wheels on the inverted T-shaped rail guide The guide frame is also connected to the guide frame of the rear guide wheel on the other inverted T-shaped rail guide. The shaft 21 is connected, and the inverted T-shaped rail guide 16 is mounted on the rail guide bottom plate 23 by bolts.

The outer side surfaces of the front guide wheel and the rear guide wheel are respectively provided with a single-sided flange 18, and the inner side surface of the single-sided flange 18 is matched with the outer side surface of the inverted T-shaped rail guide 16, and the depth of insertion is not easy. Derailment is appropriate.

The adjustable cylinder bracket comprises a plurality of columns, a beam 61, a lateral adjustment device and a vertical adjustment device. The spacing between the plurality of columns is uniform, and a plurality of beams 61 are arranged between adjacent columns, and the beams are arranged. The 61 blocks are evenly spaced in the vertical direction, and the beam 61 is provided with a cylinder fixing seat for preventing the cylinder from rolling when the cylinder is lying. The cylinder fixing seat includes an upper curved flap 53 and abutting the upper curved flap 53. The lower curved flap 54, the upper curved flap 53 and the lower curved flap 54 are butted by bolts to form a through hole for accommodating the cylinder, and the inner diameter of the through hole of the combination of the upper curved flap 53 and the lower curved flap 54 is narrowed by tightening the bolt. The cylinder is locked in the cylinder holder and cannot be rotated. The column is provided with a vertical adjustment device, and the beam is provided with a lateral adjustment device, and the lateral adjustment device includes a bottom sliding seat disposed on the lower arc 54 40, the sliding seat 40 is slidably mounted in a convex groove 39 on the beam 61, and an adjusting screw mounting seat 55 is further disposed on the inner side wall of the beam on one side of the lower curved valve 54. The adjusting screw mounting seat 55 is provided with a U-shaped groove 59; The outermost cylinder fixing seat is installed in such a manner that one end of the adjusting screw 37 is mounted on the outermost cylinder fixing seat, and the other end enters the U-shaped groove 59 of the adjusting screw mounting seat corresponding to the adjusting screw in the horizontal direction. And screw into the adjusting nut 48 in the U-shaped groove. When the adjusting nut or the outer end rectangular head of the adjusting screw is rotated forward and backward, since the nut is displaced by the wall of the U-shaped groove, only the adjustment of the screw edge is allowed. The nut forms a linear motion and then pulls the outermost cylinder holder to be displaced accordingly, thereby adjusting the cylinder of the outermost cylinder holder Corresponding position; the installation manner of the two adjacent cylinder fixing seats in the middle is: connecting the two ends of the adjusting screw 37 to the adjacent two cylinder fixing seats, and the middle portion of the adjusting screw 37 passes through the adjusting screw corresponding to the adjusting screw The U-shaped groove 59 of the mounting seat is screwed into the adjusting nut 48 in the U-shaped groove, and the nut is rotated by the forward and reverse rotation, thereby driving the adjacent two-cylinder fixing bases to face each other or opposite each other to achieve the purpose of adjusting the cylinder spacing. .

Each of the columns comprises a plurality of unit columns 57, the plurality of unit columns are sequentially installed, and the whole is arranged in a vertical direction, and the vertical adjusting device comprises an inner sleeve welded on the upper inner wall of the lower unit column 57 with a length of 30-500 mm. 58. The lower part of the upper unit column is welded with a screw matching the inner sleeve thread. The screw is made of hollow steel tube, and the lower part of the screw is screwed into the inner sleeve of the lower unit column, and the screw 49 is manually rotated by the upper handle of the screw. The inner sleeve welded inside the lower unit column forms a threaded bevel movement, since the screw and the inner sleeve are respectively fixed on the lower unit column and the upper unit column, and then converted into the upper unit column and vertically displaced to achieve the vertical dimension. The adjustment is required; the bottom of the lower unit column is provided with a support 52, and the top end of the support is in spherical contact with the bottom of the column.

Claims

The utility model relates to an inner arch-shaped beam changing device, which comprises a duct, a hollow beam, an inner arch, a rail, a cylinder and a regulating cylinder bracket, wherein the duct comprises a plurality of hollow tubes or rectangles which are coaxially butted in sequence a tube, the inner arch is disposed in a hollow beam, the hollow beam is installed in a duct that has been extruded through the foundation of the building and the inner soil is cleaned, and the inner arch and the hollow beam constitute a supporting beam; The top surface of the guide rail of the track rail is shaped to fit the hollow beam, and the cylinder is mounted on the adjustable cylinder bracket, and the front end of the piston rod of the cylinder is balanced with the outer end surface of the sleeve or the hollow beam. The frame is spherically connected, and the two hollow tubes or the rectangular tubes are butt-inserted in the front and rear. The end of one of the hollow tubes or the rectangular tubes is provided with an outer shoulder, and the corresponding hollow tube or rectangular tube The end portion is provided with an inner shoulder that cooperates with the outer shoulder, and the inner shoulder and the outer shoulder are respectively provided with a sloped surface and an erecting surface forming an angle with the inclined surface, the inner shoulder and the outer shoulder are butted to each other Tight, where the shoulders and the shoulders are positive A sealing groove is disposed on the façade and the inclined surface of the outer shoulder and the inner shoulder, and a sealing strip is installed in each sealing groove.
The inner arch-shaped underpinning beam device according to claim 1, wherein the hollow beam comprises a plurality of coaxially disposed, and sequentially connected beam segments, and a flange is disposed at an end of each of the beam segments. The flanges of two adjacent beam sections are connected by bolts or rivets, and the multi-section beam sections are combined into a hollow beam horizontally passing through the foundation of the building and both ends are mounted on the top of the underground continuous wall, and an anti-bar is provided at the bottom of the inner wall of the hollow beam. Pulling the plate, the tensile plate is fixed to the hollow beam by rivets or welding.
The inner arch bracket beam assembly of claim 1 wherein said The hollow circular tube or the rectangular tube is horizontally extruded into the soil layer of a predetermined depth under the foundation of the building until the plurality of hollow circular tubes or rectangular tubes are combined into a conduit passing through the foundation of the building and the overall length is greater than the width of the traversed building foundation Stop; the outer section of the hollow beam is made into a matching circular section or rectangular section as well as the inner section of the duct.
The inner arch type underarm beam device according to claim 1, wherein the inner arch comprises an arch rib, an arch chord and a beam pier, and a plurality of arch ribs are arranged in the long direction in the hollow beam, the arch rib is It is formed by welding a plurality of arc-shaped steel pipes in turn, and casting the non-shrinking concrete in the curved steel pipe to form a compact; the top of the arch rib is opposite to the top of the hollow beam, and the lower ends of each arch rib are formed at the contact with the beam pier. An arch, each arch supported on the inner side of the corresponding beam pier and welded to the beam pier; an arch string is arranged between the two arches of each arch rib, the arch string is a circular steel pipe or After the two ends of the arch string pass through the corresponding two arches, a pre-stress is applied to the outer side of the arch to lock and lock; the beam pier is fixed on the tensile plate at the lower part of the hollow beam, and the arch string is placed on the arch The two ends of the rib are adjacent to the top position of the beam pier, and the abutting surface of the beam pier and the arch foot is a matching arc surface, so that the curved outer side of the arch foot at both ends of the arch rib abuts against the curved side surface of the beam pier, the pier It is fixed with rivets or welding with the tensile plates, and the arch ribs, the beam piers and the arch chords share the upper part. Load; pier and arch girder chord rib also bear horizontal stress transfer.
The inner arch type underarm beam device according to claim 1, wherein the track rail comprises an inverted T-shaped rail guide, a support, a guide frame, a longitudinal connecting shaft, a transverse connecting shaft and a rail guiding bottom plate. The inverted T-shaped rails are arranged in two rows, arranged parallel to each other, and forming a pitch; on each inverted T-shaped rail guide, a rolling front and rear guide wheels, a front guide wheel and a rear guide wheel are mounted Rolling bearings are mounted, and the front and rear guide wheels on the same inverted T-shaped guide are connected by a longitudinal connecting shaft, and the front and rear guide wheels pass through the shaft pin Mounted on the rolling bearing, the two ends of the pin are supported on the two side walls of the lower part of the support, and the resistance of the front guide wheel and the rear guide wheel are reduced when rolling in the support by the rolling bearing, and the upper part is mounted on the upper part of each support The guide frame; the guide frame of the front guide wheel on one of the inverted T-shaped rail guides is connected with the guide frame of the front guide wheel on the other inverted inverted T-shaped rail guide through a transverse connecting shaft; The guide frame of the rear guide wheel on the rail guide is also connected to the guide frame of the rear guide wheel on the other inverted T-shaped rail guide, and the inverted T-shaped guide is mounted by bolts. On the rail guide base plate.
The inner arch-shaped beam changing device according to claim 5, wherein the outer side surfaces of the front guide wheel and the rear guide wheel are each provided with a single-sided flange, and the inner side of the single-sided flange Matches the outer side of the inverted T-shaped guide.
The inner arch type underarm beam device according to claim 1, wherein the adjustable cylinder bracket comprises a plurality of columns, a beam, a lateral adjustment device and a vertical adjustment device, and between the plurality of columns The spacing is uniform, and a plurality of beams are arranged between the adjacent two columns, the beams are evenly spaced in the vertical direction, and the beam is provided with a cylinder fixing seat for preventing the cylinder from rolling when the cylinder is lying, wherein the cylinder fixing seat comprises The upper curved flap and the lower curved flap abutting the upper curved flap, the upper curved flap and the lower curved flap are butted by bolts to form a through hole for accommodating the oil cylinder, and the upper curved flap and the lower curved shape are narrowed by tightening the bolt The inner diameter of the through hole of the valve combination can not be rotated by locking the oil cylinder in the cylinder fixing seat. The vertical column is provided with a vertical adjusting device, and the horizontal beam is provided with a lateral adjusting device, and the horizontal adjusting device comprises a lower arc. a sliding seat at the bottom of the flap, the sliding seat is slidably mounted in a convex groove on the beam, and an adjusting screw mounting seat is further disposed on the inner side wall of the beam on the side of the lower curved flap, the adjusting screw mounting seat U-shaped groove is provided; for the installation of the outermost cylinder holder Therefore, one end of the adjusting screw is installed on the outermost cylinder fixing seat, and the other end enters the U-shaped groove of the adjusting screw mounting seat corresponding to the adjusting screw in the horizontal direction, and is screwed into the adjusting nut in the U-shaped groove, When the adjusting nut or the outer end rectangular head of the adjusting screw is rotated forward and backward, since the nut is restricted by the wall of the U-shaped groove, only the adjusting screw can be linearly moved along the adjusting nut to pull the outermost cylinder fixing seat. Shifting accordingly, so as to adjust the corresponding position of the cylinder on the outermost cylinder holder; for the two adjacent cylinder holders in the middle, the installation method is: connecting the two ends of the adjustment screw to the adjacent two cylinder holders The middle portion of the adjusting screw passes through the U-shaped groove of the adjusting screw mounting seat corresponding to the adjusting screw, and is screwed into the adjusting nut in the U-shaped groove, and the nut is fixed by the forward and reverse rotation, thereby driving the adjacent two cylinders to be fixed. The seats are opposite or opposite each other to achieve the purpose of adjusting the cylinder spacing.
The inner arch-shaped beam changing device according to claim 7, wherein each of the columns comprises a plurality of unit columns, the plurality of unit columns are sequentially installed, and the whole is arranged in a vertical direction, the vertical adjusting device The upper inner wall of the lower unit column is welded with an inner sleeve of 30-500 mm length, and the lower part of the upper unit column is welded with a screw matching the inner sleeve thread, the screw is made of hollow steel tube, and the lower part of the screw is screwed into the lower unit column. In the inner sleeve, by manually rotating the handle of the upper part of the screw, the screw and the inner sleeve welded inside the lower unit column form a threaded inclined surface movement, since the screw and the inner sleeve are respectively fixed on the lower unit column and the upper unit column, and the lower unit column The downward movement is limited by the ground and then converted into a vertical one-way displacement movement of the upper unit column to meet the adjustment of the vertical dimension; the bottom of the lower unit column is provided with a support, and the top of the support is in spherical contact with the bottom of the column. .