CN111576240A - Assembled bent cap construction safety protection integration platform - Google Patents
Assembled bent cap construction safety protection integration platform Download PDFInfo
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- CN111576240A CN111576240A CN202010499298.0A CN202010499298A CN111576240A CN 111576240 A CN111576240 A CN 111576240A CN 202010499298 A CN202010499298 A CN 202010499298A CN 111576240 A CN111576240 A CN 111576240A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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Abstract
The invention discloses an integrated safety protection platform for fabricated bent cap construction, which comprises a construction platform body, wherein a guardrail is arranged on the top surface of the construction platform body, and a longitudinal channel steel and a transverse channel steel are arranged on the bottom surface of the construction platform body; the transverse channel steel is fixedly connected with a first telescopic rod through a vertical positioning steel bar, the first telescopic rod comprises a groove-shaped rod section and a flat rod section, and four first telescopic rods form a rectangular telescopic frame body through fastening bolts; the bottom surface of the first telescopic rod is riveted with a second telescopic rod through a first telescopic supporting arm, and the four second telescopic rods form a rectangular telescopic frame through fastening bolts; the first telescopic link is riveted with the first hoop through the second telescopic support arm, and the second telescopic link is riveted with the second hoop through the third telescopic support arm. The invention constructs a double hoop supporting structure, changes the concept of traditional hoop capping beam construction, converts platform bearing into transverse external pressure to the hoop, greatly improves the static friction between the hoop and the pier, improves the platform load bearing capacity and safety, and is suitable for capping beam construction of high piers.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to an integrated safety protection platform for fabricated bent cap construction.
Background
In recent years, with the great increase of the number of railway and highway engineering in China, bridge construction has been popularized to various mountainous areas with complex terrains, such as Sichuan-Tibet railways and Qinghai-Tibet highways, which need to construct a large number of bridges.
In mountainous areas with complex terrain, the bridge piers are often very high, such as a Huechan grand bridge called as the first high pier in Asia, which is located in Huech in Guizhou province, on the Bijie to Weining highway, the field is located in the north of Wumeng mountain range in Yunobi plateau, the terrain is uneven, the west is high and the east is low, and the Huechan grand bridge is located at the highest position of the altitude, and the highest pier of the Huechan grand bridge is up to 195 meters; therefore, the construction by adopting the bracket method of the low pier stud bent cap is completely unachievable, and the construction by adopting the hoop method is required.
The high pier stud bent cap of bridge engineering generally adopts the staple bolt method construction, need not to handle former ground after the stand construction is accomplished during the construction of staple bolt method, has reduced the material waste, practices thrift the time limit for a project, the cost is reduced, has reduced high support risk simultaneously.
However, the existing anchor ear method construction of the bridge pier only depends on static friction force generated by thick rubber clamped between the anchor ear and the upright post and bolt strength used for fastening the anchor ear, so that accurate calculation is needed during construction, the required high-strength bolt torque coefficient mu 1 is often required to be more than 0.15 to ensure safety, the weight of a capping beam template and pouring workers on the bridge pier needs to be strictly controlled, and alternative construction is needed in many times to influence the construction period.
Therefore, the biggest defect of the existing bridge pier hoop construction method is that the friction force of the hoop is too much depended to cause the insufficient bearing capacity, and the invention provides the double hoop support structure for enhancing the horizontal pressure of the hoop on the bridge pier to realize skid resistance.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an integrated safety protection platform for construction of an assembled bent cap.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated safety protection platform for fabricated bent cap construction comprises a construction platform body, wherein the construction platform body is erected on two groups of piers, guardrails are arranged on the periphery of the top surface of the construction platform body, four longitudinal channel steel are symmetrically arranged on the bottom surface of the construction platform body, two longitudinal channel steel are located at the left side close to a left pier, the other two longitudinal channel steel are located at the right side close to a right pier, two symmetrical transverse channel steel are fixedly connected to the bottom surfaces of the four longitudinal channel steel, a rectangular frame structure is formed by the four longitudinal channel steel and the two transverse channel steel, and the two groups of piers are located inside the rectangular frame structure;
the bottom surface of the transverse channel steel is fixedly connected with a vertical positioning steel bar, the bottom end of the vertical positioning steel bar is fixedly connected with a first telescopic rod, the first telescopic rod comprises a groove-shaped rod section, the side wall of which is provided with a strip-shaped groove, and a flat rod section, the thickness of which is smaller than the height of the strip-shaped groove, screw holes are equidistantly arranged on the upper surface of the flat rod section, the vertical positioning steel bar is arranged at the end part of the upper surface of the groove-shaped rod section far away from the direction of the flat rod section, fastening bolts are inserted into the middle parts of the upper surface and the lower surface of the groove-shaped rod section, the flat rod section of one first telescopic rod is sleeved in the strip-shaped groove of the groove-shaped rod section of the other first telescopic rod and connected;
the end part of the lower surface of the groove-shaped rod section of the first telescopic rod is riveted with a first telescopic support arm through a hanging lug, the first telescopic support arm consists of an outer sleeve and an inner slide rod, the bottom of the wall of the outer sleeve is provided with a pin, the rod wall of the inner slide rod is equidistantly provided with circular grooves matched with the pin, and the top end of the outer sleeve and the bottom end of the inner slide rod are both provided with riveting holes riveted with the hanging lug;
the bottom end of the first telescopic support arm is riveted with a second telescopic rod, the second telescopic rod also comprises a groove-shaped rod section with a strip-shaped groove on the side wall and a flat rod section with the thickness smaller than the height of the strip-shaped groove, the end part of the upper surface of the groove-shaped rod section of the second telescopic rod far away from the direction of the flat rod section is provided with a hanging lug riveted with the first telescopic support arm, fastening bolts are also inserted in the middle positions of the upper surface and the lower surface of the groove-shaped rod section, the flat rod section of one second telescopic rod is sleeved in the strip-shaped groove of the groove-shaped rod section of the other second telescopic rod and connected through the fastening bolts, and the four second telescopic rods form another group of rectangular telescopic frame body through four; the length of the second telescopic rod is smaller than that of the first telescopic rod, the inner width of a rectangular telescopic frame formed by the second telescopic rod is also smaller than that of a rectangular telescopic frame formed by the first telescopic rod, so that the first telescopic support arm is obliquely arranged, the first telescopic support arm and the second telescopic rod form an inverted trapezoidal structure with wide top and narrow bottom, and the gravity borne by the first telescopic rod is converted into an acting force which is obliquely downward and the decomposition force faces the interior of the pier;
the lower surface of the groove-shaped rod section of the first telescopic rod is further riveted with a second telescopic support arm through a hanging lug, the second telescopic support arm also comprises an outer sleeve and an inner sliding rod, the end part of the outer sleeve is provided with a riveting hole, the total length of the second telescopic support arm is smaller than that of the first telescopic support arm, the bottom end of the second telescopic support arm is riveted on the outer side wall of the first hoop, the first hoop is positioned between the first telescopic rod and the second telescopic rod, the inclination of the second telescopic support arm is larger than that of the first telescopic support arm, so that the other part of the gravity borne by the first telescopic rod is converted into an external pressure action which inclines downwards to the first hoop and the decomposition force faces the interior of the pier through the second telescopic support arm, the first hoop is subjected to the internal pressures of the four second telescopic support arms during loading, the first hoop is retracted inwards, and the friction force between the first hoop and the; the first anchor ear is formed by two groups of semicircular hoop sheets which are butted through high-strength bolts at two ends, a rubber layer is bonded on the inner arc surface of the first anchor ear and is tightly attached to the wall of a pier, and four groups of second telescopic supporting arms are symmetrically arranged on the outer arc surface of the first anchor ear;
the lower surface of the groove-shaped rod section of the second telescopic rod is further riveted with a third telescopic support arm through a hanging lug, the third telescopic support arm also comprises an outer sleeve with a riveting hole at the end part and an inner slide rod, the third telescopic support arm is the same as the second telescopic support arm in size, the bottom end of the third telescopic support arm is riveted on the outer side wall of a second hoop, the second hoop is located at the position below the second telescopic rod, the second hoop is the same as the first hoop in size, the second hoop is also formed by butt joint of two groups of semicircular hoop sheets through high-strength bolts at two ends, the inner arc surface of the second hoop is glued with a rubber layer and is tightly attached to a pier wall, and four groups of third telescopic support arms are symmetrically arranged on the outer arc surface of the second hoop. The second staple bolt outer wall is exerted through the flexible support arm of third again under the decurrent effect of slope that first flexible support arm received, improves the frictional force between second staple bolt and the pier greatly, still has great frictional force effect when the second staple bolt rubber layer became invalid again, and its principle comes from: the friction force is in direct proportion to the vertical pressure, the gravity load of the construction platform body is transmitted to the first anchor ear through the second telescopic support arm and transmitted to the second anchor ear through the first telescopic support arm and the third telescopic support arm through mechanism transmission and torque conversion, and after the force is decomposed, the external pressure horizontally facing the bridge pier is generated besides the downward sliding force, so that the static friction force of the first anchor ear and the second anchor ear is greatly improved, the load bearing capacity and the safety of the construction platform body are improved, and the construction platform is suitable for the capping beam construction of high bridge piers.
Preferably, the cap ends of the fastening bolts and the pins are both provided with cross self-tapping grooves, and the fastening bolts and the pins are both made of 35CrMoA high-strength steel; the fastening bolt is used for fastening the first telescopic rod and the second telescopic rod, so that the inner widths of the upper rectangular telescopic frame body and the lower rectangular telescopic frame body are constant, the first telescopic rod basically keeps the rectangular shape without torsion deformation under the fastening action of the vertical positioning steel bars, the second telescopic rod basically keeps the rectangular shape without torsion deformation under the fixing action of the first telescopic supporting arm, and the fastening bolt is used for resisting the sliding force in the horizontal direction and also needs a high-strength material; the pin plays a role in fixing and determining the lengths of the first telescopic support arm, the second telescopic support arm and the third telescopic support arm, and the multi-degree-of-freedom double hoop support structure is constructed by the fastening action of the fastening bolt and the pin and the matching of the second hoop and the high-strength bolt on the first hoop, so that the gravity load of the construction platform body is transmitted to not only the single hoop in the prior art is increased into the double hoops, and the force bearing part is also decomposed and converted to the first telescopic rod, the second telescopic rod, the first telescopic supporting arm, the second telescopic supporting arm, the third telescopic supporting arm, the first hoop and the second hoop by the hoops in the prior art, the key force bearing parts are the fastening bolt, the pin, the second anchor ear and the high-strength bolt on the first anchor ear, and the stronger the strength of the fastening bolt, the pin and the high-strength bolt, the larger the capacity of the construction platform body can be.
Preferably, the top end of the vertical positioning steel bar is firstly bound by an iron wire and then is welded on the bottom surface of the transverse channel steel in a seamless mode, the bottom end of the vertical positioning steel bar is firstly sleeved with a flange piece and then is integrally welded at the end position of the upper surface of the groove-shaped rod section of the first telescopic rod, the two fastening methods are reliable, and the strength is stronger than that of a common directly-welded structure.
Preferably, the inner wall of the strip-shaped groove of the groove-shaped rod section of the first telescopic rod and the outer wall of the flat rod section of the second telescopic rod are frosted surfaces, the roughness of the frosted surfaces is Ra25-50um, the frosted surfaces play a role in skid resistance, the appropriate small amplitude deformation of the rectangular telescopic frame body is beneficial to evenly dividing the bearing capacity to the four first telescopic rods, but the excessive large deformation is easy to cause uneven stress of the hoops, so the frosted surfaces are adopted to inhibit the large deformation of the rectangular telescopic frame body, and the generated friction force can further enhance the double-hooping supporting structure.
Preferably, the guard rail on the top surface of the construction platform body is also provided with a working channel, and when the height of the bent cap is lower than 20m, a ladder stand can be arranged at the working channel; when the height of the cover beam is higher than 20m, a crane can be used for feeding and getting people.
Preferably, fill up between the interior slide bar of first flexible support arm, the flexible support arm of second and third and be equipped with high strength compression spring between the outer sleeve diapire, increase high strength compression spring purpose and make first flexible support arm, the flexible support arm of second and third keep the trend of toward outer extension, play the shock attenuation and prevent the effect of rocking.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts a first telescopic rod and a second telescopic rod to form two groups of horizontal rectangular telescopic frame bodies which are arranged at the periphery of a pier, the two groups of rectangular telescopic frame bodies are connected into an octahedral structure through a telescopic first telescopic supporting arm, a first hoop is arranged inside the octahedral structure through a second telescopic supporting arm, and the second hoop is arranged below the octahedral structure through a third telescopic supporting arm; when the first telescopic rod bears the load, the second telescopic supporting arm applies downward inclined pressure to the first hoop to play a role in fastening the first hoop; the first telescopic supporting arm applies acting force inclining towards the direction of the pier to the second telescopic rod, and then the third telescopic supporting arm applies downward pressure to the second hoop to fasten the second hoop. Therefore, the double hoop supporting structure is constructed, the concept of traditional hoop method bent cap construction is overturned, the platform bearing is converted into transverse external pressure to the hoop, the static friction between the hoop and the pier is greatly improved, the load bearing capacity and the safety of the construction platform body are improved, and the double hoop supporting structure is suitable for bent cap construction of high piers.
Drawings
FIG. 1 is a schematic structural diagram of an integrated safety protection platform for construction of an assembled bent cap according to the invention;
FIG. 2 is a force-bearing decomposition schematic diagram of the fabricated bent cap construction safety protection integrated platform provided by the invention;
FIG. 3 is a partial three-dimensional structure diagram of an integrated platform for safety protection in the construction of an assembled bent cap according to the present invention;
fig. 4 is an internal structure view of a first telescopic supporting arm of the fabricated bent cap construction safety protection integrated platform provided by the invention.
In the figure: construction platform body 1, pier 2, guardrail 3, vertical channel-section steel 4, horizontal channel-section steel 5, vertical positioning steel bar 6, first telescopic link 7, fastening bolt 8, hangers 9, first flexible support arm 10, pin 11, second telescopic link 12, the flexible support arm 13 of second, first staple bolt 14, the flexible support arm 15 of third, second staple bolt 16, high strength compression spring 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, the safety protection integrated platform for the fabricated bent cap construction comprises a construction platform body 1, wherein the construction platform body 1 is erected on two groups of piers 2, guardrails 3 are arranged around the top surface of the construction platform body 1, four longitudinal channel steel 4 are symmetrically arranged on the bottom surface of the construction platform body 1, two longitudinal channel steel 4 are located at the left side close to the left pier 2, the other two longitudinal channel steel 4 are located at the right side close to the right pier 2, two symmetrical transverse channel steel 5 are fixedly connected to the bottom surfaces of the four longitudinal channel steel 4, the four longitudinal channel steel 4 and the two transverse channel steel 5 form a rectangular frame structure, and the two groups of piers 2 are located inside the rectangular frame structure; the bottom surface of the transverse channel steel 5 is fixedly connected with a vertical positioning steel bar 6, the bottom end of the vertical positioning steel bar 6 is fixedly connected with a first telescopic rod 7, the first telescopic rod 7 comprises a groove-shaped rod section with a side wall provided with a strip-shaped groove and a flat rod section with the thickness smaller than the height of the strip-shaped groove, screw holes are equidistantly formed in the upper surface of the flat rod section, the vertical positioning steel bar 6 is arranged at the end part of the upper surface of the groove-shaped rod section far away from the flat rod section, fastening bolts 8 are inserted into the middle parts of the upper surface and the lower surface of the groove-shaped rod section, the flat rod section of one first telescopic rod 7 is sleeved in the strip-shaped groove of the groove-shaped rod section of the other first telescopic rod 7 and connected through the fastening bolts 8, and the four first telescopic rods 7; the end part of the lower surface of the groove-shaped rod section of the first telescopic rod 7 is riveted with a first telescopic support arm 10 through a hanging lug 9, the first telescopic support arm 10 consists of an outer sleeve and an inner slide rod, a pin 11 is arranged at the bottom of the wall of the outer sleeve, circular grooves matched with the pin 11 are equidistantly arranged on the rod wall of the inner slide rod, and riveting holes riveted with the hanging lug 9 are formed in the top end of the outer sleeve and the bottom end of the inner slide rod; the bottom end of the first telescopic support arm 10 is riveted with a second telescopic arm 12, the second telescopic arm 12 also comprises a groove-shaped rod section with a strip-shaped groove on the side wall and a flat rod section with the thickness smaller than the height of the strip-shaped groove, the end part of the upper surface of the groove-shaped rod section of the second telescopic arm 12 far away from the flat rod section is provided with a suspension loop 9 riveted with the first telescopic support arm 10, fastening bolts 8 are also inserted in the middle positions of the upper surface and the lower surface of the groove-shaped rod section, the flat rod section of one second telescopic arm 12 is sleeved in the strip-shaped groove of the groove-shaped rod section of the other second telescopic arm 12 and connected through the fastening bolts 8, and the four second telescopic arms 12 form another group of rectangular telescopic frame body through four groups of fastening bolts; the length of the second telescopic rod 12 is smaller than that of the first telescopic rod 7, the inner width of a rectangular telescopic frame formed by the second telescopic rod 12 is also smaller than that of the rectangular telescopic frame formed by the first telescopic rod 7, so that the first telescopic support arm 10 is obliquely arranged, the first telescopic rod 7, the first telescopic support arm 10 and the second telescopic rod 12 form an inverted trapezoidal structure with wide top and narrow bottom, and the gravity borne by the first telescopic rod 7 is converted into an acting force which is obliquely downward and the decomposition force of the acting force faces the interior of the pier 2; the lower surface of the groove-shaped rod section of the first telescopic rod 7 is further riveted with a second telescopic support arm 13 through a hanging lug 9, the second telescopic support arm 13 also comprises an outer sleeve and an inner slide rod, the end part of the outer sleeve is provided with a riveting hole, the total length of the second telescopic support arm 13 is smaller than that of the first telescopic support arm 10, the bottom end of the second telescopic support arm 13 is riveted on the outer side wall of a first hoop 14, the first hoop 14 is positioned between the first telescopic rod 7 and the second telescopic rod 12, the inclination of the second telescopic support arm 13 is larger than that of the first telescopic support arm 10, thereby, the other part of the gravity borne by the first telescopic rod 7 is converted into the external pressure which inclines downwards to the first anchor ear 14 and the decomposition force is towards the inside of the pier 2 through the second telescopic supporting arms 13, the first anchor ear 14 bears the internal pressure of the four second telescopic supporting arms 13 when bearing the load, thereby enabling the first anchor ear 14 to contract inwards and greatly improving the friction force between the first anchor ear 14 and the pier 2; the first anchor ear 14 is formed by two groups of semicircular hoop sheets which are butted through high-strength bolts at two ends, the inner arc surface of the first anchor ear 14 is glued with a rubber layer and is clung to the wall of the pier 2, and the four groups of second telescopic supporting arms 13 are symmetrically arranged on the outer arc surface of the first anchor ear 14; the 12 flute profile pole section lower surfaces of second telescopic link are still riveted with third flexible support arm 15 through hangers 9, third flexible support arm 15 also includes outer sleeve and interior slide bar that the tip area riveted hole, third flexible support arm 15 is the same with the flexible support arm 13 size of second, the bottom riveting of third flexible support arm 15 is on the lateral wall of second staple bolt 16, second staple bolt 16 is located the position of second telescopic link 12 below, second staple bolt 16 is the same with the 14 yardstick of first staple bolt, second staple bolt 16 is also formed by the butt joint of the high strength bolt at both ends through two sets of semicircle hoop sheets, the interior cambered surface glue of second staple bolt 16 has the rubber layer and hugs closely with 2 walls of pier, four sets of the flexible support arm 15 symmetry of third set up on the extrados of second staple bolt 16. Under the downward effect of slope that first flexible support arm 10 received again through third flexible support arm 15 apply the 16 outer walls of second staple bolt, improve the frictional force between 16 and the pier 2 of second staple bolt greatly, still have great frictional force effect when the 16 rubber layer of second staple bolt became invalid again, its principle comes from: the friction force is in direct proportion to the vertical pressure, the gravity load of the construction platform body 1 is transmitted to the first anchor ear 14 through the second telescopic supporting arm 13 and transmitted to the second anchor ear 16 through the first telescopic supporting arm 10 and the third telescopic supporting arm 15 through mechanism transmission and torque conversion, and after force decomposition, the gravity load generates downward sliding force and external pressure horizontally facing the pier 2, so that the static friction force of the first anchor ear 14 and the second anchor ear 16 is greatly improved, the load bearing capacity and the safety of the construction platform body 1 are improved, and the construction platform is suitable for capping beam construction of high piers.
Referring to fig. 3, the cap ends of the fastening bolt 8 and the pin 11 are both provided with cross self-tapping grooves, and the fastening bolt 8 and the pin 11 are both made of 35CrMoA high-strength steel; the fastening bolt 8 is used for fastening the first telescopic rod 7 and the second telescopic rod 12, so that the inner widths of the upper rectangular telescopic frame body and the lower rectangular telescopic frame body are constant, the first telescopic rod 7 basically keeps rectangular deformation without torsion under the fastening action of the vertical positioning steel bars 6, the second telescopic rod 12 basically keeps rectangular deformation without torsion under the fixation of the first telescopic supporting arm 10, and the fastening bolt 8 is used for resisting the sliding force in the horizontal direction and also needs a high-strength material; the pin 11 is used for fixing and determining the length of the first telescopic support arm 10, the second telescopic support arm 13 and the third telescopic support arm 15, and a multi-freedom-degree double hoop support structure is constructed by the fastening action of the fastening bolt 8 and the pin 11 and the matching of the second hoop 16 and the high-strength bolt on the first hoop 14, so that the gravity load of the construction platform body 1 is transferred, not only the single hoop in the prior art is added into the double hoops, and the force bearing part is also decomposed and converted to a first telescopic rod 7, a second telescopic rod 12, a first telescopic supporting arm 10, a second telescopic supporting arm 13, a third telescopic supporting arm 15, a first hoop 14 and a second hoop 16 by the hoops in the prior art, the key force bearing parts, namely the fastening bolt 8, the pin 11, the second anchor ear 16 and the high-strength bolt on the first anchor ear 14, have higher strength, and the construction platform body 1 has higher capacity.
Referring to fig. 1-3, the top end of the vertical positioning steel bar 6 is bound by iron wires and then welded on the bottom surface of the transverse channel steel 5 in a seamless mode, the bottom end of the vertical positioning steel bar 6 is sleeved with a flange piece and then integrally welded on the end portion of the upper surface of the groove-shaped bar section of the first telescopic bar 7, and the two fastening methods are reliable and stronger in strength compared with a common directly-welded structure.
Referring to fig. 1-3, the inner wall of the strip groove of the groove-shaped pole section of the first telescopic pole 7 and the outer wall of the flat pole section of the second telescopic pole 12 are frosted surfaces with a roughness of Ra25-50um, the frosted surfaces have an anti-skid function, the appropriate small amplitude deformation of the rectangular telescopic frame body is beneficial to evenly dividing the bearing capacity to the four first telescopic poles 7, but the excessive large deformation is easy to cause uneven stress of the hoop, so the frosted surfaces are adopted to inhibit the large deformation of the rectangular telescopic frame body, and the generated friction force can further enhance the double hoop supporting structure of the invention.
Referring to fig. 1, a working channel is further formed in a guardrail 3 on the top surface of a construction platform body 1, and when the height of a bent cap is lower than 20m, a ladder stand can be arranged at the working channel; when the height of the cover beam is higher than 20m, a crane can be used for feeding and getting people.
Referring to fig. 4, a high-strength compression spring 17 is disposed between the inner slide rod of the first telescopic support arm 10, the second telescopic support arm 13 and the third telescopic support arm 15 and the bottom wall of the outer sleeve, and the high-strength compression spring 17 is added to keep the first telescopic support arm 10, the second telescopic support arm 13 and the third telescopic support arm 15 in an outward extending trend, so as to achieve the effects of damping and preventing shaking.
The installation method of the invention can comprise the following steps:
1) determining the height positions of the first anchor ear 14 and the second anchor ear 16 on the pier 2 through simple calculation, and fastening the first anchor ear 14 and the second anchor ear 16 at preset positions through high-strength bolts;
2) the second telescopic supporting arm 13 is connected to the bottom surface of the groove-shaped rod section of the first telescopic rod 7 through the hanging lug 9, then the four first telescopic rods 7 are assembled into a rectangular telescopic frame body through the fastening bolts 8, and correspondingly, the second telescopic rod 12 forms another rectangular telescopic frame body through the four groups of fastening bolts 8; the two groups of rectangular telescopic frame bodies are hung together through the first telescopic supporting arm 10, and the bottom surface of the groove-shaped rod section of the second telescopic rod 12 is connected with the outer side wall of the second hoop 16 through the hanging lug 9 and the third telescopic supporting arm 15;
3) the spirit level is placed on the top surface of a groove-shaped rod section of any one first telescopic rod 7, the length of each second telescopic support arm 13 is adjusted through a pin 11, the length and the gradient of each second telescopic support arm 13 are basically consistent, the first hoop 14 is located between the first telescopic rod 7 and the second telescopic rod 12, the horizontal direction of the first telescopic rod 7 is ensured in the process, and after the position of the first telescopic rod 7 is adjusted, the fastening bolt 8 of the first telescopic rod 7 and the pin 11 of the second telescopic support arm 13 are locked;
4) the spirit level is placed on the top surface of a groove-shaped rod section of any one second telescopic rod 12, the length and the inclination of each second telescopic support arm 13 are basically consistent by adjusting the length of each first telescopic support arm 10 through a pin 11, a second hoop 16 is always positioned at the lower position of the second telescopic rod 12, the horizontal direction of the second telescopic rod 12 is ensured in the process, and after the position of the second telescopic rod 12 is adjusted, a fastening bolt 8 of the second telescopic rod 12 and the pin 11 of the first telescopic support arm 10 are locked;
5) the length of each third telescopic supporting arm 15 is finely adjusted through the pin 11, so that the length and the inclination of each third telescopic supporting arm 15 are basically consistent;
6) according to the structure, the vertical positioning steel bars 6, the transverse channel steel 5, the longitudinal channel steel 4 and the construction platform body 1 with the guardrail 3 are sequentially welded on the first telescopic rod 7, then a heavy object is hung on the construction platform body 1, the load is uniformly and equivalently gradually added on the construction platform body 1, the load capacity of the invention is tested, and the qualified condition is that the slippage of the first hoop 14 and the second hoop 16 is not more than 10 cm; and then, carrying out uneven stress analysis on the construction platform body 1, testing the inclination degree of the construction platform body 1 when the two groups of piers are unevenly stressed, and taking the inclination angle smaller than 2% as a qualified condition.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The integrated platform for the safety protection in the construction of the assembled bent cap comprises a construction platform body (1) and is characterized in that the construction platform body (1) is erected on two groups of piers (2), guardrails (3) are arranged on the periphery of the top surface of the construction platform body (1), four longitudinal channel steels (4) are symmetrically arranged on the bottom surface of the construction platform body (1), two longitudinal channel steels (4) are located at the left position close to the left pier (2), the other two longitudinal channel steels (4) are located at the right position close to the right pier (2), the bottom surfaces of the four longitudinal channel steels (4) are fixedly connected with two symmetrical transverse channel steels (5), the four longitudinal channel steels (4) and the two transverse channel steels (5) form a rectangular frame structure, and the two groups of piers (2) are located inside the rectangular frame structure;
the bottom surface of the transverse channel steel (5) is fixedly connected with a vertical positioning steel bar (6), the bottom end of the vertical positioning steel bar (6) is fixedly connected with a first telescopic rod (7), the first telescopic rod (7) comprises a groove-shaped rod section with a strip-shaped groove on the side wall and a flat rod section with the thickness smaller than the height of the strip-shaped groove, screw holes are equidistantly arranged on the upper surface of the flat rod section, the vertical positioning steel bars (6) are arranged at the end part of the upper surface of the groove-shaped rod section far away from the flat rod section, fastening bolts (8) are inserted in the middle positions of the upper surface and the lower surface of the groove-shaped rod section, the flat rod section of one of the first telescopic rods (7) is sleeved in the strip-shaped groove of the groove-shaped rod section of the other first telescopic rod (7) and is connected through fastening bolts (8), and the four first telescopic rods (7) form a group of rectangular telescopic frame bodies through four groups of fastening bolts (8);
the end part of the lower surface of the groove-shaped rod section of the first telescopic rod (7) is riveted with a first telescopic support arm (10) through a hanging lug (9), the first telescopic support arm (10) consists of an outer sleeve and an inner slide rod, a pin (11) is arranged at the bottom of the wall of the outer sleeve, circular grooves matched with the pin (11) are equidistantly arranged on the rod wall of the inner slide rod, and riveting holes riveted with the hanging lug (9) are respectively formed in the top end of the outer sleeve and the bottom end of the inner slide rod;
the bottom end of the first telescopic support arm (10) is riveted with a second telescopic rod (12), the second telescopic rod (12) also comprises a groove-shaped rod section with a strip-shaped groove on the side wall and a flat rod section with the thickness smaller than the height of the strip-shaped groove, a hanging lug (9) riveted with the first telescopic support arm (10) is arranged at the end part of the upper surface of the groove-shaped rod section of the second telescopic rod (12) far away from the direction of the flat rod section, fastening bolts (8) are also inserted in the middle positions of the upper surface and the lower surface of the groove-shaped rod section, the flat rod section of one second telescopic rod (12) is sleeved in the strip-shaped groove of the groove-shaped rod section of the other second telescopic rod (12) and is connected through the fastening bolts (8), and the four second telescopic rods (12) form another group of rectangular telescopic frame body through four groups of fastening bolts (8); the length of the second telescopic rod (12) is smaller than that of the first telescopic rod (7), and the inner width of a rectangular telescopic frame formed by the second telescopic rod (12) is also smaller than that of the rectangular telescopic frame formed by the first telescopic rod (7);
the lower surface of the groove-shaped rod section of the first telescopic rod (7) is also riveted with a second telescopic supporting arm (13) through a hanging lug (9), the second telescopic supporting arm (13) also comprises an outer sleeve with a riveting hole at the end part and an inner sliding rod, the total length of the second telescopic supporting arm (13) is smaller than that of the first telescopic supporting arm (10), the bottom end of the second telescopic supporting arm (13) is riveted on the outer side wall of the first hoop (14), the first hoop (14) is positioned between the first telescopic rod (7) and the second telescopic rod (12), the first hoop (14) is formed by two groups of semicircular hoop sheets which are butted through high-strength bolts at two ends, the inner arc surface of the first anchor ear (14) is cemented with a rubber layer and is tightly attached to the wall of the pier (2), and the four groups of second telescopic support arms (13) are symmetrically arranged on the outer arc surface of the first anchor ear (14);
the lower surface of the groove-shaped rod section of the second telescopic rod (12) is riveted with a third telescopic supporting arm (15) through a hanging lug (9), the third telescopic supporting arm (15) also comprises an outer sleeve with a riveting hole at the end part and an inner sliding rod, the third telescopic supporting arm (15) and the second telescopic supporting arm (13) have the same size, the bottom end of the third telescopic supporting arm (15) is riveted on the outer side wall of the second hoop (16), the second hoop (16) is positioned below the second telescopic rod (12), the second hoop (16) has the same size as the first hoop (14), the second hoop (16) is also formed by butt joint of two groups of semicircular hoop sheets through high-strength bolts at two ends, the inner arc surface of the second anchor ear (16) is glued with a rubber layer and is tightly attached to the wall of the pier (2), and the four groups of third telescopic support arms (15) are symmetrically arranged on the outer arc surface of the second anchor ear (16).
2. The integrated platform for the construction safety protection of the fabricated capping beam as claimed in claim 1, wherein the cap ends of the fastening bolts (8) and the pins (11) are provided with cross self-tapping grooves, and the fastening bolts (8) and the pins (11) are made of 35CrMoA high-strength steel.
3. The integrated platform for the construction and safety protection of the fabricated bent cap according to claim 1, wherein the top end of the vertical positioning steel bar (6) is bound by iron wires and then welded on the bottom surface of the transverse channel steel (5) in a seamless manner, and the bottom end of the vertical positioning steel bar (6) is sleeved with a flange plate and then integrally welded at the end position of the upper surface of the groove-shaped bar section of the first telescopic bar (7).
4. The integrated platform for the construction and safety protection of the fabricated capping beam as claimed in claim 1, wherein the inner wall of the strip-shaped groove and the outer wall of the flat rod of the groove-shaped rod section of the first telescopic rod (7) and the second telescopic rod (12) are frosted surfaces with roughness of Ra25-50 um.
5. The integrated platform for the construction and safety protection of the fabricated capping beam as claimed in claim 1, wherein a working channel is further formed on the guardrail (3) on the top surface of the construction platform body (1).
6. The fabricated cap beam construction safety protection integrated platform as claimed in claim 1, wherein high-strength compression springs (17) are padded between the inner slide bars of the first telescopic support arm (10), the second telescopic support arm (13) and the third telescopic support arm (15) and the bottom wall of the outer sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010499298.0A CN111576240A (en) | 2020-06-04 | 2020-06-04 | Assembled bent cap construction safety protection integration platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010499298.0A CN111576240A (en) | 2020-06-04 | 2020-06-04 | Assembled bent cap construction safety protection integration platform |
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| CN111576240A true CN111576240A (en) | 2020-08-25 |
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| CN202010499298.0A Pending CN111576240A (en) | 2020-06-04 | 2020-06-04 | Assembled bent cap construction safety protection integration platform |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610018A (en) * | 2020-12-22 | 2021-04-06 | 魏如雪 | A reinforcement assembly for square steel column that building engineering used |
| CN115354582A (en) * | 2022-09-15 | 2022-11-18 | 中国水利水电第一工程局有限公司 | Mounting bracket for prefabricated sectional capping beam and using method thereof |
| NL2033976A (en) * | 2022-09-29 | 2023-02-10 | China Railway Seventh Eng Bureau Group Guangzhou Eng Co Ltd | A Kind of Holding the Hoop Reinforcement Frame |
-
2020
- 2020-06-04 CN CN202010499298.0A patent/CN111576240A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610018A (en) * | 2020-12-22 | 2021-04-06 | 魏如雪 | A reinforcement assembly for square steel column that building engineering used |
| CN115354582A (en) * | 2022-09-15 | 2022-11-18 | 中国水利水电第一工程局有限公司 | Mounting bracket for prefabricated sectional capping beam and using method thereof |
| CN115354582B (en) * | 2022-09-15 | 2023-03-14 | 中国水利水电第一工程局有限公司 | Mounting bracket for prefabricated sectional capping beam and using method thereof |
| NL2033976A (en) * | 2022-09-29 | 2023-02-10 | China Railway Seventh Eng Bureau Group Guangzhou Eng Co Ltd | A Kind of Holding the Hoop Reinforcement Frame |
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