A kind of assembled composite steel support structure and connection method thereof

Abstract

The present invention relates to an assembled composite steel support structure, including H-shaped steel support standard parts, a flange connection system, a transverse tie rod system and an oblique tie rod system. The axial connection nodes of the H-shaped steel support standard parts are connected by matching between H-shaped steel connection end plates arranged at both ends of adjacent H-shaped steel support standard parts, and the flange plates of adjacent H-shaped steel support standard parts are limitedly connected with the flange connection system. The transverse connection of the H-shaped steel support standard parts adopts the H-shaped steel support standard parts and the transverse tie rod system and the oblique tie rod system to be pin-connected. The transverse tie rod system and the oblique tie rod system can adjust the length. When assembled, they are pin-connected with the H-shaped steel support standard parts to form a truss structure with good integrity and relatively clear mechanical properties. The steel support structure of the present invention has the characteristics of being green, environmentally friendly, quick to install, safe and stable, and can greatly improve the integrity and reliability of the assembled steel support structure system, and further reduce the project cost.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support engineering, in particular to an assembled combined steel support structure and a connection method thereof. Background Art

[0002] With the continuous acceleration of urbanization, the scale of construction is increasing. As a result, the scale of foundation pit projects is gradually developing towards super-large and super-deep directions. The surrounding environment is becoming more and more complex with the continuous development and utilization of urban space. At the same time, the design of foundation pit projects under complex conditions has also changed from traditional strength control to deformation control. The internal support technology is more suitable for use in urban foundation pit support projects because of its advantages such as not affecting the underground space outside the foundation pit, high rigidity, and easy control of deformation.

[0003] Although the concrete support system has the advantages of flexible and diverse layout, high support stiffness, and good integrity, it has the problems of long installation and removal time, large vibration and noise during the removal process, and the inability to recycle the removed waste. Compared with the concrete internal support system, the steel support system has the characteristics of quick installation, no maintenance, easy removal, and recyclable steel support, which is conducive to reducing the project cost and conforms to the concept of sustainable development.

[0004] At present, the main steel supports used in foundation pit projects are steel pipe supports and steel supports. However, the node strength of steel pipe supports is relatively low, the overall stiffness is relatively small, and foundation pit collapse accidents also occur from time to time. At present, steel supports are mostly connected by multiple H-shaped steel supports parallel to each other through cover plates. However, due to the weak stiffness of the cover plates themselves and the connection only at the upper flange, the node connection strength and stiffness are weak, and there are defects such as eccentricity. In order to give full play to the advantages of H-shaped steel supports, solving the interconnection nodes between H-shaped steels and improving the integrity of H-shaped steel supports are issues that need to be solved. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to overcome the shortcomings of poor integrity of the assembled composite steel support structure in existing foundation pit projects, too many holes in the steel flange, low connection strength between steels, and complex connection forms, an assembled composite steel support structure and a connection method thereof are provided.

[0006] The technical solution adopted by the present invention is: an assembled composite steel support structure, including H-shaped steel support standard parts, flange connection system, transverse tie rod system and oblique tie rod system, the H-shaped steel support standard parts include H-shaped steel connection end plates located at both ends of the axial direction, flange plates located at both ends of the vertical direction and web plates arranged on the inner wall of the vertical connection flange plates,

[0007] The flange plate is provided with tie rod connection holes along the axial direction.

[0008] The axial connection nodes of the H-beam support standard parts are connected by matching the H-beam connection end plates arranged at both ends of the adjacent H-beam support standard parts, and the flange plates of the adjacent H-beam support standard parts are connected by limiting the flange connection system.

[0009] The transverse connection of the H-shaped steel support standard parts adopts the pin connection between the H-shaped steel support standard parts and the transverse tie rod system and the diagonal tie rod system.

[0010] The transverse tie rod system comprises two transverse tie rods and a transverse tie rod internal thread outer sleeve. The transverse tie rods are formed of two transverse tie rod bifurcated rods forming a Y-shaped structure and a transverse tie rod horizontal rod connecting the two transverse tie rod bifurcated rods at one point.

[0011] The oblique tie rod system comprises two oblique tie rods and an oblique tie rod internal thread outer sleeve. The oblique tie rods are connected by oblique tie rods forming a straight-line structure.

[0012] The ends of the two transverse tie rod bifurcated rods away from the transverse tie rod horizontal rod are each provided with a transverse tie rod socket sleeve perpendicular thereto.

[0013] One end of the oblique tie rod connecting rod is provided with an oblique tie rod socket sleeve perpendicular thereto.

[0014] The inner diameters of the transverse tie rod socket sleeve and the oblique tie rod socket sleeve are the same as the diameter of the tie rod connecting hole, and the transverse tie rod socket sleeve, the oblique tie rod socket sleeve and the tie rod connecting hole form a pin shaft fit through a latch pin.

[0015] Specifically, the number and arrangement of the transverse tie rod system and the diagonal tie rod system can be reasonably matched according to the actual situation on site, and different forms of truss structures can be formed. Preferably, the matched transverse tie rod system and the diagonal tie rod system form a Z-shaped structure between the H-shaped steel support standard parts adjacent in the horizontal direction.

[0016] Preferably, the diameter of the latch is not less than 30 mm.

[0017] Furthermore, a monitoring sleeve system for monitoring the axial force of the combined steel support is provided between the H-steel connecting end plates at both ends of the adjacent H-steel support standard parts, and the monitoring sleeve system includes a monitoring sleeve A and a monitoring sleeve B that are plugged into each other, the monitoring sleeve A includes a monitoring sleeve connecting end plate A, a square sleeve A and a round sleeve A, and the monitoring sleeve B includes a monitoring sleeve connecting end plate B, a square sleeve B, a round sleeve B and a short stiffening rib;

[0018] One side of the monitoring casing connection end plate A and the monitoring casing connection end plate B are respectively fixed to the adjacent H-shaped steel connection end plates. The H-shaped steel connection end plates are provided with flange connection holes that are bolted with the monitoring casing connection end plates A and B through the end plate connection bolts. The number of the end plate connection bolts is not less than 4 and is evenly distributed along the center. The two H-shaped steel connection end plates of the monitoring casing system are the same in size, thickness and connection bolt hole position as the standard connection end plates of the H-shaped steel support.

[0019] The above-mentioned monitoring casing system places the monitoring element into the circular casing A in the monitoring casing A, connects the connecting end plates at both ends of the monitoring casing system with the connecting end plates of the H-shaped steel support standard parts, and inserts the monitoring casing B with matching geometric dimensions axially into the monitoring casing A; under the axial force of the H-shaped steel support standard parts, the monitoring casing system gradually presses the monitoring element to realize real-time monitoring of the axial force of the steel support; the monitoring element is arranged inside the monitoring casing system and is firmly installed, not affected by the external environment, and the monitoring data is true and reliable; the two matching square casings and circular casings in the monitoring casing system limit each other, the steel support standard parts are not prone to falling off, the strength of the connection nodes is guaranteed, and the overall structure is easy to install and disassemble and can be reused.

[0020] Furthermore, the center positions of the circular casing and the square casing in the monitoring casing system correspond to the axis center of the H-shaped steel support standard part.

[0021] Furthermore, the monitoring element is installed in a circular casing of a monitoring casing system, and the monitoring casing system has reserved threading holes for passing through signal lines of the monitoring element.

[0022] Furthermore, the square sleeve A and the round sleeve A are fixed to the other side of the monitoring sleeve connection end plate A, and the round sleeve A is located inside the square sleeve A. The square sleeve B, the round sleeve B and the short stiffening rib are fixed to the other side of the monitoring sleeve connection end plate B, and the round sleeve B is located inside the square sleeve B. The short stiffening rib is used to connect the square sleeve B and the round sleeve B. The short stiffening rib is provided to improve the overall strength of the monitoring sleeve system.

[0023] The square sleeve A is inserted into the square sleeve B and the square sleeve A and the square sleeve B fit together, and the round sleeve B is inserted into the round sleeve A and the round sleeve A and the round sleeve B fit together to form the mutual plug-in cooperation of the monitoring sleeve A and the monitoring sleeve B.

[0024] Furthermore, the flange connection system includes a flange node plate and a clamp, one end of the flange node plate is bolted to the flange plate of the H-shaped steel support standard component, and the other end is matched with the clamp and then plugged into the flange plate of the adjacent H-shaped steel support standard component and then slidably connected.

[0025] The flange node plate adopts a T-shaped structure with protrusions on both sides of one end. A protrusion is provided in the vertical direction on one side of the clamp, and a penetrating clamp connecting hole is provided at the protrusion of the clamp. The clamp is connected to the protruding bolts of the flange node plate by clamp connecting bolts passing through the clamp connecting hole, and the number of clamp connecting bolts is not less than 2. A gap for inserting the flange plate is left between the other side of the clamp and the flange node plate. After the clamp is clamped, a certain gap must be left between the clamp and the flange plate to facilitate the H-shaped steel support standard parts; at the same time, the clamp can further serve as a constraint component to limit the displacement of the H-shaped steel under the action of axial tension.

[0026] Furthermore, adjusting the distance between the clamp in the flange connection system and the end plate of the H-beam support standard part can be used to limit the maximum displacement of the monitoring casing system to prevent axial slippage between the H-beam support standard parts. Specifically, the maximum displacement of the monitoring casing system is within 1mm to ensure the stability of the connection structure.

[0027] Furthermore, a gusset plate connection hole is provided at one end of the flange gusset plate away from the protruding portion.

[0028] The flange plate is provided with a flange bolt hole that is bolted with the node plate connection hole through the node plate connection bolt, and the number of the node plate connection bolts on one side of the flange node plate in the axial direction is not less than 4;

[0029] The thickness of the flange node plate and the clamp is greater than that of the flange plate. The flange node plate is made of steel material to enhance the connection stiffness between the steel sections. The length of the flange node plate does not exceed the spacing between adjacent tie rod connection holes.

[0030] Preferably, the thickness of the flange node plate and the clamp is more than 1.5 times the thickness of the flange plate.

[0031] Furthermore, the connecting ends of the two horizontal bars of the transverse tie rods are provided with transverse tie rod length adjustment screws, and the two transverse tie rod length adjustment screws and the transverse tie rod internal thread outer sleeve form a transverse tie rod length adjustment device that is threadedly matched, and the two transverse tie rod length adjustment screws are provided with reverse-rotating threads of a certain length, and the transverse tie rod internal thread outer sleeve is provided with internal threads that match the reverse-rotating threads;

[0032] The connecting ends of the two oblique tie rod connecting rods are provided with oblique tie rod length adjustment screws, and the two oblique tie rod length adjustment screws and the oblique tie rod internal thread outer sleeve form an oblique tie rod length adjustment device that is threadedly matched; the two oblique tie rod length adjustment screws are provided with reverse-rotating threads of a certain length, and the oblique tie rod internal thread outer sleeve is provided with internal threads that match the reverse-rotating threads.

[0033] Specifically, the wall thickness of the transverse tie rod internal threaded outer sleeve and the oblique tie rod internal threaded outer sleeve is respectively greater than the wall thickness of the transverse tie rod horizontal rod and the oblique tie rod connecting rod; the length of the transverse tie rod internal threaded outer sleeve and the oblique tie rod internal threaded outer sleeve is less than the sum of the length of the transverse tie rod horizontal rod and the transverse tie rod length adjustment screw, the oblique tie rod connecting rod and the oblique tie rod length adjustment screw, and the specific length is determined according to needs.

[0034] Furthermore, the tie rod connection holes are arranged at 1 / 4 of the distance from the edge on both sides of the flange plate in the horizontal direction. The diameter of the tie rod connection holes and the distance from the web plate should be determined by comprehensive consideration of the cross-sectional dimensions and stress state of the H-shaped steel support standard parts; both sides of the tie rod connection holes are provided with short stiffening plates at both ends of the connection holes arranged vertically.

[0035] The short stiffening plates at both ends of the connection hole are fixedly connected to the web plate and the flange plate at one end.

[0036] Furthermore, the total vertical length of the two transverse tie rods is equal to the distance between the inner walls of the flange plates at both ends.

[0037] The sum of the heights of the two transverse tie rod sockets and the height of the oblique tie rod sockets are equal to 1 / 2 of the distance between the inner walls of the flange plates at both ends of the vertical direction, and the height of the oblique tie rod sockets is equal to the spacing between the two transverse tie rod sockets.

[0038] Preferably, the heights of the two transverse tie rod sockets are the same;

[0039] The thickness of the transverse tie rod socket sleeve and the oblique tie rod socket sleeve is greater than the thickness of the flange plate. The specific thickness should be determined comprehensively based on the stress state of the H-shaped steel support standard parts.

[0040] Furthermore, the middle section of the inner thread outer sleeve of the transverse tie rod is provided with a transverse tie rod tightening structure for facilitating the knob turning and a transverse tie rod stress monitoring device for facilitating the application of prestress on site.

[0041] The middle section of the inner thread outer sleeve of the oblique tie rod is provided with an oblique tie rod tightening structure for facilitating the knob turning and an oblique tie rod stress monitoring device for facilitating the application of prestress on site.

[0042] Specifically, the transverse tie rod tightening structure and the oblique tie rod tightening structure adopt tightening holes or external hexagonal protrusions;

[0043] The transverse tie rod stress monitoring device and the diagonal tie rod stress monitoring device can reasonably apply prestress to the transverse tie rod system and the diagonal tie rod system, and can also monitor in real time the stress change trends of the two tie rod systems when the combined steel support structure system is working.

[0044] Furthermore, the cross-section of the transverse tie rod or the oblique tie rod is H-shaped, circular or other regular cross-section.

[0045] A method for connecting an assembled composite steel support structure comprises the following steps:

[0046] S1. Place the ends of H-beam support standard parts of the same specification opposite to each other, connect the H-beam connection end plate of one H-beam support standard part to the monitoring sleeve A through the end plate connection bolts, and connect the adjacent H-beam connection end plate of another H-beam support standard part to the monitoring sleeve B, then put the detection element into the circular sleeve A, and then plug and match the monitoring sleeve A and the monitoring sleeve B, then plug and slide one side of the flange node plate and the flange plate of the H-beam support standard part through the clamping fit, and then connect the other side with the flange plate bolts of the adjacent H-beam support standard part through the node plate connection bolts to complete the axial connection of the H-beam support standard part;

[0047] S2. Place the array of H-shaped steel support standard parts that have completed axial connection in sequence in the horizontal direction, align the transverse tie rod socket sleeve with the tie rod connection hole, insert the pin to temporarily fix it, then pull out the temporary fixing pin, install the oblique tie rod socket sleeve to the middle position of the transverse tie rod socket sleeve and align it, insert the pin to formally fix it, and complete the transverse connection of the H-shaped steel support standard parts;

[0048] S3. Adjust the length of the transverse tie system and the diagonal tie system and apply prestress to eliminate installation gaps and form a complete truss structure.

[0049] When the combined steel support structure system is laterally connected by two sections of H-shaped steel support standard parts, the bending inertia moment of the composed truss structure in the elastic stage can be obtained according to the following formula:

[0050]

[0051] in, I 1 、I 2 represent the weak axis inertia moment of the H-beam support standard parts, A 1. A 2 respectively represent the cross-sectional area of ​​the H-beam support standard parts, h It is the distance between the cross-section centroids of two sections of support standard parts.

[0052] When the combined steel support structure system is horizontally connected by three sections of H-shaped steel support standard parts, the bending inertia moment of the composed truss structure in the elastic stage can be obtained by the following formula:

[0053]

[0054] in, I 1 、I 2 、I3 represents the weak axis moment of inertia of the H-beam support standard at the neutral axis position, A 1. A 2 respectively represent the cross-sectional area of ​​the H-beam support standard parts, h It is the distance between the cross-section centroids of two sections of support standard parts.

[0055] When the combined steel support structure system is horizontally connected by four sections of H-shaped steel support standard parts, the bending inertia moment of the composed truss structure in the elastic stage can be obtained by the following formula:

[0056]

[0057] in, I 1 、I 2 、I 3 、I 4 respectively represent the weak axis inertia moment of the two sections of H-beam support standard parts near the neutral axis, A 1. A 2. A 3. A 4 respectively represent the cross-sectional areas of the two sections of H-shaped steel support standard parts near the neutral axis, h It is the distance between the cross-section centroids of two sections of support standard parts.

[0058] The out-of-plane bending inertia moment of the composite steel support structure system, which is composed of N sections of H-shaped steel support standard parts in the horizontal direction, can be obtained by the following formula in the elastic stage.

[0059] H = H 1+ H 2+......+ H n

[0060] in, H 1 、H 2.…… H n They respectively represent the strong axis moment of inertia of the H-beam support standard parts.

[0061] Compared with the prior art, the present invention has the following advantages: the present invention can solve the problems of the current prefabricated steel support connection due to the weak steel strength of the cover plate itself and the weak strength and rigidity of the connection point only at the upper flange, as well as the existence of defects such as eccentricity; it can solve the problem of weak integrity of the prefabricated steel support, and the H-shaped steel support standard parts are connected horizontally through tie rods to form an adjustable truss structure, so that the integrity, strength and rigidity of the steel support are improved, which has great economic and social value for improving the safety of deep foundation pit engineering support projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a first structural schematic diagram of the present invention;

[0063] Figure 2 The present invention Figure 1 A schematic diagram of the structure from another angle;

[0064] Figure 3 This is a schematic diagram of the first connection of the H-beam support standard parts of the present invention;

[0065] Figure 4 It is a schematic diagram of the transverse tie rod structure of the present invention;

[0066] Figure 5 It is a schematic diagram of the oblique tie rod structure of the present invention;

[0067] Figure 6 It is a schematic diagram of the connection structure of the transverse tie rod system of the present invention;

[0068] Figure 7 It is a schematic diagram of the connection structure of the oblique tie rod system of the present invention;

[0069] Figure 8 It is a structural schematic diagram of the flange connection system of the present invention;

[0070] Fig. 9 It is a structural schematic diagram of the monitoring casing system of the present invention;

[0071] Fig.10 The present invention Figure 3 Schematic cross-sectional view of ;

[0072] Fig.11 It is a second structural schematic diagram of the present invention;

[0073] Fig.12 The present invention Fig.11 A schematic diagram of the structure from another angle;

[0074] Fig.13 This is a second connection diagram of the H-beam support standard component of the present invention.

[0075] Numbers in the figure: 1-H-shaped steel support standard parts, 11-H-shaped steel connection end plate, 12-flange bolt hole, 13-tie rod connection hole, 14-short stiffener plates at both ends of the connection hole, 15-flange connection hole, 16-web plate, 17-flange plate, 18-end plate connection bolt; 2-flange connection system, 21-flange node plate, 22-node plate connection bolt, 23-node plate connection hole, 24-clamp, 25-clamp connection hole, 26-clamp connection bolt; 3-transverse tie rod, 31-transverse tie rod bifurcation rod, 32-transverse tie rod horizontal rod, 33-transverse tie rod socket sleeve, 34-transverse tie rod length adjustment screw; 4-oblique tie rod, 41 - oblique tie rod connecting rod, 42- oblique tie rod socket sleeve, 43- oblique tie rod length adjustment screw; 5- transverse tie rod system; 6- transverse tie rod internal thread outer sleeve, 61- transverse tie rod tightening structure, 62- transverse tie rod stress monitoring device; 7- oblique tie rod system; 8- oblique tie rod internal thread outer sleeve, 81- oblique tie rod tightening structure, 82- oblique tie rod stress monitoring device; 9- monitoring sleeve system, 91- monitoring sleeve connecting end plate A, 92- monitoring sleeve connecting end plate B, 93- square sleeve A, 94- square sleeve B, 95- round sleeve A, 96- round sleeve B, 97- short stiffening rib; 10- latch. DETAILED DESCRIPTION

[0076] The embodiments of the present invention are described in detail below. The embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0077] Example 1

[0078] like Figure 1-Figure 9 As shown, an assembled composite steel support structure includes an H-shaped steel support standard component 1, a flange connection system 2, a transverse tie rod system 5 and an oblique tie rod system 7. The H-shaped steel support standard component 1 includes an H-shaped steel connection end plate 11 located at both ends of the axial direction, a flange plate 17 located at both ends of the vertical direction, and a web plate 16 arranged on the inner wall of the vertical connection flange plate 17.

[0079] The flange plate 17 is provided with tie rod connection holes 13 along the axial direction.

[0080] The axial connection nodes of the H-beam support standard parts 1 are connected by the H-beam connection end plates 11 arranged at both ends of the adjacent H-beam support standard parts 1, and the flange plates 17 of the adjacent H-beam support standard parts 1 are connected with the flange connection system 2 in a limited position.

[0081] The lateral connection of the H-shaped steel support standard part 1 is achieved by pinning the H-shaped steel support standard part 1 with the lateral tie rod system 5 and the diagonal tie rod system 7.

[0082] The transverse tie rod system 5 includes two transverse tie rods 3 and a transverse tie rod internal thread outer sleeve 6. The transverse tie rod 3 is formed by two transverse tie rod bifurcated rods 31 forming a Y-shaped structure and a transverse tie rod horizontal rod 32 connecting the two transverse tie rod bifurcated rods 31 at one point.

[0083] The oblique tie rod system 7 includes two oblique tie rods 4 and an oblique tie rod internal thread outer sleeve 8. The oblique tie rod 4 uses an oblique tie rod connecting rod 41 forming a straight-line structure.

[0084] The ends of the two transverse tie rod bifurcated rods 31 away from the transverse tie rod horizontal rod 32 are both provided with transverse tie rod socket sleeves 33 perpendicular thereto.

[0085] One end of the oblique tie rod connecting rod 41 is provided with an oblique tie rod socket sleeve 42 perpendicular thereto.

[0086] The inner diameters of the transverse tie rod socket sleeve 33 and the oblique tie rod socket sleeve 42 are the same as the diameter of the tie rod connecting hole 13 , and the transverse tie rod socket sleeve 33 , the oblique tie rod socket sleeve 42 and the tie rod connecting hole 13 form a pin shaft fit through the latch 10 .

[0087] The number and arrangement of the transverse tie rod system 5 and the diagonal tie rod system 7 can be reasonably matched according to the actual situation on site to form different forms of truss structures. The matched transverse tie rod system 5 and the diagonal tie rod system 7 form a Z-shaped structure between the H-shaped steel support standard parts 1 adjacent in the transverse direction.

[0088] The diameter of the latch pin 10 is not less than 30 mm, which is slightly smaller than the diameter of the tie rod connection hole 13 .

[0089] A monitoring sleeve system 9 for monitoring the axial force of the combined steel support is provided between the H-steel connecting end plates 11 at both ends of the adjacent H-steel support standard parts 1. The monitoring sleeve system 9 includes a monitoring sleeve A and a monitoring sleeve B that are plugged into each other. The monitoring sleeve A includes a monitoring sleeve connecting end plate A91, a square sleeve A93 and a round sleeve A95. The monitoring sleeve B includes a monitoring sleeve connecting end plate B92, a square sleeve B94, a round sleeve B96 and a short stiffening rib 97.

[0090] One side of the monitoring casing connection end plate A91 and the monitoring casing connection end plate B92 are respectively fixed on the adjacent H-shaped steel connection end plate 11. The H-shaped steel connection end plate 11 is provided with a flange connection hole 15 which is bolted with the monitoring casing connection end plate A91 and the monitoring casing connection end plate B92 through the end plate connection bolts 18. The number of the end plate connection bolts 18 is 4 and they are regularly distributed.

[0091] The square sleeve A93 and the round sleeve A95 are fixed to the other side of the monitoring sleeve connection end plate A91, and the round sleeve A95 is located inside the square sleeve A93. The square sleeve B94, the round sleeve B96 and the short stiffening rib 97 are fixed to the other side of the monitoring sleeve connection end plate B92, and the round sleeve B96 is located inside the square sleeve B94. The short stiffening rib 97 is used to connect the square sleeve B94 and the round sleeve B96.

[0092] The square sleeve A93 is inserted into the outside of the square sleeve B94 and the square sleeve A93 and the square sleeve B94 fit together, and the round sleeve B96 is inserted into the outside of the round sleeve A95 and the round sleeve A95 and the round sleeve B96 fit together to form the mutual plug-in fit of the monitoring sleeve A and the monitoring sleeve B.

[0093] The flange connection system 2 includes a flange node plate 21 and a clamp 24. One end of the flange node plate 21 is bolted to the flange plate 17 of the H-shaped steel support standard component 1, and the other end is matched with the clamp 24 and then plugged and slidably connected to the flange plate 17 of the adjacent H-shaped steel support standard component 1.

[0094] The flange gusset plate 21 adopts a T-shaped structure with protrusions on both sides of one end. A protrusion is vertically provided on one side of the clamp 24. A penetrating clamp connection hole 25 is provided at the protrusion of the clamp 24. The clamp 24 is bolted to the protrusion of the flange gusset plate 21 by a clamp connection bolt 26 passing through the clamp connection hole 25. The number of the clamp connection bolts 26 is 2. A gap for inserting the flange plate 17 is left between the other side of the clamp 24 and the flange gusset plate 21.

[0095] A gusset plate connection hole 23 is provided at one end of the flange gusset plate 21 away from the protruding portion.

[0096] The flange plate 17 is provided with flange bolt holes 12 which are bolted with the node plate connection holes 23 through the node plate connection bolts 22. The number of the node plate connection bolts 22 on one side of the flange node plate 21 and the flange plate 17 in the axial direction is 4.

[0097] The thickness of the flange node plate 21 is greater than the thickness of the flange plate 17 , the thickness of the clamp 24 is greater than the thickness of the flange plate 17 , and the length of the flange node plate 21 does not exceed the spacing between adjacent tie rod connection holes 13 .

[0098] The connecting ends of the two horizontal transverse tie rods 32 are provided with transverse tie rod length adjustment screws 34, and the two transverse tie rod length adjustment screws 34 and the transverse tie rod internal thread outer sleeve 6 form a transverse tie rod length adjustment device that is threadedly matched. The two transverse tie rod length adjustment screws 34 are provided with reverse-rotation threads of a certain length, and the transverse tie rod internal thread outer sleeve 6 is provided with internal threads that match the reverse-rotation threads;

[0099] The connecting ends of the two oblique tie rod connecting rods 41 are provided with oblique tie rod length adjustment screws 43, and the two oblique tie rod length adjustment screws 43 and the oblique tie rod internal thread outer sleeve 8 form an oblique tie rod length adjustment device that is threadedly matched; the two oblique tie rod length adjustment screws 43 have a certain length of reverse thread, and the oblique tie rod internal thread outer sleeve 8 is provided with an internal thread that matches the reverse thread.

[0100] The wall thickness of the internal threaded outer sleeve of the transverse tie rod and the internal threaded outer sleeve of the oblique tie rod are respectively greater than the wall thickness of the horizontal rod of the transverse tie rod and the connecting rod of the oblique tie rod; the length of the internal threaded outer sleeve of the transverse tie rod and the internal threaded outer sleeve of the oblique tie rod is less than the sum of the length of the horizontal rod of the transverse tie rod and the transverse tie rod length adjustment screw, the oblique tie rod connecting rod and the oblique tie rod length adjustment screw, and the specific length is determined according to demand.

[0101] The tie rod connection holes 13 are arranged at 1 / 4 of the distance from the edge on both sides of the flange plate 17 in the horizontal direction. The diameter of the tie rod connection holes and the distance from the web plate should be determined based on the cross-sectional dimensions and stress state of the H-shaped steel support standard parts. Both sides of the tie rod connection holes 13 are provided with short stiffening plates 14 at both ends of the connection holes arranged vertically.

[0102] The short stiffening plates 14 at both ends of the connection hole are fixedly connected to the web plate 16 and the flange plate 17 at one end.

[0103] The total vertical length of the two transverse tie rods 31 is equal to the distance between the inner walls of the flange plates 17 at both ends.

[0104] The sum of the heights of the two transverse tie rod socket sleeves 33 and the height of the oblique tie rod socket sleeve 42 are both equal to 1 / 2 of the distance between the inner walls of the flange plates 17 at both ends of the vertical direction, and the height of the oblique tie rod socket sleeve 42 is equal to the spacing between the two transverse tie rod socket sleeves 33.

[0105] The height of the two transverse tie rod sockets is the same;

[0106] The thickness of the transverse tie rod socket sleeve 33 and the oblique tie rod socket sleeve 42 is greater than the thickness of the flange plate 17, and the specific thickness should be determined comprehensively according to the stress state of the H-shaped steel support standard parts.

[0107] The middle section of the transverse tie rod internal thread outer sleeve 6 is provided with a transverse tie rod tightening structure 61 for convenient knob turning and a transverse tie rod stress monitoring device 62 for convenient on-site prestressing.

[0108] An oblique tie rod tightening structure 81 for facilitating the turning of the knob and an oblique tie rod stress monitoring device 82 for facilitating the application of prestress on site are provided at the middle section of the oblique tie rod internal thread outer sleeve 8.

[0109] The transverse tie rod tightening structure and the oblique tie rod tightening structure adopt tightening holes or external hexagonal protrusions;

[0110] The transverse tie rod stress monitoring device and the diagonal tie rod stress monitoring device can reasonably apply prestress to the transverse tie rod system and the diagonal tie rod system, and can also monitor in real time the stress change trends of the two tie rod systems when the combined steel support structure system is working.

[0111] The cross section of the transverse tie rod 3 or the oblique tie rod 4 is H-shaped, circular or other regular cross sections.

[0112] A method for connecting an assembled composite steel support structure comprises the following steps:

[0113] S1. Place the ends of H-beam support standard parts 1 of the same specification opposite to each other, connect the H-beam connection end plate 11 of one H-beam support standard part 1 to the monitoring sleeve A through the end plate connection bolts 18, and connect the adjacent H-beam connection end plate 11 of another H-beam support standard part 1 to the monitoring sleeve B, then put the detection element into the circular sleeve A95, and then plug and match the monitoring sleeve A and the monitoring sleeve B, then plug and slide one side of the flange node plate 21 and the clamp 24 with the flange plate 17 of the H-beam support standard part 1, and then bolt the other side to the flange plate 17 of the adjacent H-beam support standard part 1 through the node plate connection bolts 22 to complete the axial connection of the H-beam support standard part 1;

[0114] S2, place the array of H-shaped steel support standard parts 1 that have completed axial connection in sequence in the horizontal direction, align the transverse tie rod socket sleeve 33 with the tie rod connection hole 13, insert the pin 10 to temporarily fix it, then pull out the temporary fixing pin 10, install the oblique tie rod socket sleeve 42 to the middle position of the transverse tie rod socket sleeve 33 and align it, insert the pin 10 to formally fix it, and complete the transverse connection of the H-shaped steel support standard parts 1;

[0115] S3. Adjust the length of the transverse tie rod system 5 and the diagonal tie rod system 7 and apply prestress to eliminate installation gaps and form a complete truss structure.

[0116] Example 2

[0117] like Figure 10-12 As shown, an assembled composite steel support structure includes an H-shaped steel support standard component 1, a flange connection system 2, a transverse tie rod system 5 and an oblique tie rod system 7. The H-shaped steel support standard component 1 includes an H-shaped steel connection end plate 11 located at both ends of the axial direction, a flange plate 17 located at both ends of the vertical direction, and a web plate 16 arranged on the inner wall of the vertical connection flange plate 17.

[0118] The flange plate 17 is provided with tie rod connection holes 13 along the axial direction.

[0119] The flange connection system 2 comprises a flange gusset plate 21,

[0120] The axial connection nodes of the H-beam support standard parts 1 are connected by bolts through the H-beam connection end plates 11 provided at both ends of the adjacent H-beam support standard parts 1, and the flange plates 17 of the adjacent H-beam support standard parts 1 are connected by bolts to the same flange node plate 21.

[0121] The lateral connection of the H-shaped steel support standard part 1 is achieved by pinning the H-shaped steel support standard part 1 with the lateral tie rod system 5 and the diagonal tie rod system 7.

[0122] The transverse tie rod system 5 includes two transverse tie rods 3 and a transverse tie rod internal thread outer sleeve 6. The transverse tie rod 3 is formed by two transverse tie rod bifurcated rods 31 forming a Y-shaped structure and a transverse tie rod horizontal rod 32 connecting the two transverse tie rod bifurcated rods 31 at one point.

[0123] The oblique tie rod system 7 includes two oblique tie rods 4 and an oblique tie rod internal thread outer sleeve 8. The oblique tie rod 4 uses an oblique tie rod connecting rod 41 forming a straight-line structure.

[0124] The ends of the two transverse tie rod bifurcated rods 31 away from the transverse tie rod horizontal rod 32 are both provided with transverse tie rod socket sleeves 33 perpendicular thereto.

[0125] One end of the oblique tie rod connecting rod 41 is provided with an oblique tie rod socket sleeve 42 perpendicular thereto.

[0126] The inner diameters of the transverse tie rod socket sleeve 33 and the oblique tie rod socket sleeve 42 are the same as the diameter of the tie rod connecting hole 13 , and the transverse tie rod socket sleeve 33 , the oblique tie rod socket sleeve 42 and the tie rod connecting hole 13 form a pin shaft fit through the latch 10 .

[0127] The number and arrangement of the transverse tie rod system 5 and the diagonal tie rod system 7 can be reasonably matched according to the actual situation on site to form different forms of truss structures. The matched transverse tie rod system 5 and the diagonal tie rod system 7 form a Z-shaped structure between the H-shaped steel support standard parts 1 adjacent in the transverse direction.

[0128] The diameter of the latch pin 10 is not less than 30 mm, which is slightly smaller than the diameter of the tie rod connection hole 13 .

[0129] The connecting ends of the two horizontal transverse tie rods 32 are provided with transverse tie rod length adjustment screws 34, and the two transverse tie rod length adjustment screws 34 and the transverse tie rod internal thread outer sleeve 6 form a transverse tie rod length adjustment device that is threadedly matched. The two transverse tie rod length adjustment screws 34 are provided with reverse-rotation threads of a certain length, and the transverse tie rod internal thread outer sleeve 6 is provided with internal threads that match the reverse-rotation threads;

[0130] The connecting ends of the two oblique tie rod connecting rods 41 are provided with oblique tie rod length adjustment screws 43, and the two oblique tie rod length adjustment screws 43 and the oblique tie rod internal thread outer sleeve 8 form an oblique tie rod length adjustment device that is threadedly matched; the two oblique tie rod length adjustment screws 43 have a certain length of reverse thread, and the oblique tie rod internal thread outer sleeve 8 is provided with an internal thread that matches the reverse thread.

[0131] The wall thickness of the transverse tie rod internal threaded outer sleeve 6 and the oblique tie rod internal threaded outer sleeve 8 are respectively greater than the wall thickness of the transverse tie rod horizontal rod 32 and the oblique tie rod connecting rod 41; the length of the transverse tie rod internal threaded outer sleeve 6 and the oblique tie rod internal threaded outer sleeve 8 is less than the sum of the lengths of the transverse tie rod horizontal rod 32 and the transverse tie rod length adjustment screw 34, the oblique tie rod connecting rod 41 and the oblique tie rod length adjustment screw 43.

[0132] The flange plate 17 is provided with flange bolt holes 12.

[0133] The flange gusset plate 21 is provided with a gusset plate connection hole 23 which is bolted with the flange bolt hole 12 through a gusset plate connection bolt 22. The number of gusset plate connection bolts 22 on one side of the flange gusset plate 21 and the flange plate 17 in the axial direction is 4.

[0134] The thickness of the flange gusset plate 21 is slightly greater than the thickness of the flange plate 17 , and the length of the flange gusset plate 21 does not exceed the spacing between adjacent tie rod connection holes 13 .

[0135] The H-shaped steel connecting end plate 11 is provided with end plate connecting bolt holes 15 for bolting with the adjacent H-shaped steel connecting end plate 11 through end plate connecting bolts 18 . The number of the end plate connecting bolts 18 is 6.

[0136] The tie rod connection hole 13 is horizontally arranged at 1 / 4 of the edge on both sides of the flange plate 17, and short stiffening plates 14 are vertically arranged at both ends of the connection hole on both sides of the tie rod connection hole 13. The height of the short stiffening plates 14 at both ends of the connection hole does not exceed 1 / 2 of the vertical distance between the inner walls of the flange plates 17 at both ends.

[0137] The short stiffening plates 14 at both ends of the connection hole are fixedly connected to the web plate 16 and the flange plate 17 at one end.

[0138] The total vertical length of the two transverse tie rods 31 is equal to the distance between the inner walls of the flange plates 17 at both ends.

[0139] The sum of the heights of the two transverse tie rod socket sleeves 33 and the height of the oblique tie rod socket sleeve 42 are both equal to 1 / 2 of the distance between the inner walls of the flange plates 17 at both ends of the vertical direction, and the height of the oblique tie rod socket sleeve 42 is equal to the spacing between the two transverse tie rod socket sleeves 33.

[0140] The heights of the two transverse tie rod socket sleeves 33 are the same;

[0141] The thickness of the transverse tie rod socket sleeve 33 and the oblique tie rod socket sleeve 42 is greater than the thickness of the flange plate 17 .

[0142] The middle section of the transverse tie rod internal thread outer sleeve 6 is provided with a transverse tie rod tightening structure 61 for convenient knob turning and a transverse tie rod stress monitoring device 62 for convenient on-site prestressing.

[0143] An oblique tie rod tightening structure 81 for facilitating the turning of the knob and an oblique tie rod stress monitoring device 82 for facilitating the application of prestress on site are provided at the middle section of the oblique tie rod internal thread outer sleeve 8.

[0144] The transverse tie rod tightening structure 61 and the oblique tie rod tightening structure 81 use tightening holes;

[0145] The transverse tie rod stress monitoring device 62 and the diagonal tie rod stress monitoring device 82 can reasonably apply prestress to the transverse tie rod system 5 and the diagonal tie rod system 7, and can also monitor in real time the stress change trends of the two tie rod systems when the combined steel support structure system is working.

[0146] The cross section of the transverse tie rod 3 or the oblique tie rod 4 is H-shaped, circular or other regular cross sections.

[0147] A method for connecting an assembled composite steel support structure comprises the following steps:

[0148] S1. After the ends of the H-beam support standard parts 1 of the same specification are butt-jointed, the H-beam connection end plates 11 are connected using the end plate connection bolts 18, and then the flange node plates 21 are used to connect the flange plates 17 of the H-beam support standard parts 1 again through the node plate connection bolts 22 to complete the axial connection of the H-beam support standard parts 1;

[0149] S2, place the array of H-shaped steel support standard parts 1 that have completed axial connection in sequence in the horizontal direction, align the transverse tie rod socket sleeve 33 with the tie rod connection hole 13, insert the pin 10 to temporarily fix it, then pull out the temporary fixing pin 10, install the oblique tie rod socket sleeve 42 to the middle position of the transverse tie rod socket sleeve 33 and align it, insert the pin 10 to formally fix it, and complete the transverse connection of the H-shaped steel support standard parts 1;

[0150] S3. Adjust the length of the transverse tie rod system 5 and the diagonal tie rod system 7 and apply prestress to eliminate installation gaps and form a complete truss structure.

[0151] The present invention is not limited to the embodiments described above. The above description of the specific embodiments is intended to describe and illustrate the technical solution of the present invention. The above specific embodiments are merely illustrative and not restrictive. Without departing from the scope of the present invention and the scope of protection of the claims, a person of ordinary skill in the art can also make many forms of specific changes under the guidance of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. An assembled composite steel support structure, characterized in that: The invention comprises an H-shaped steel support standard component (1), a flange connection system (2), a transverse tie rod system (5) and an oblique tie rod system (7), wherein the H-shaped steel support standard component (1) comprises an H-shaped steel connection end plate (11) located at two axial ends, a flange plate (17) located at two vertical ends and a web plate (16) arranged on the inner wall of the vertical connection flange plate (17). The flange plate (17) is provided with a tie rod connection hole (13) along the axial direction. The axial connection nodes of the H-beam support standard parts (1) are connected by matching between H-beam connection end plates (11) provided at both ends of adjacent H-beam support standard parts (1), and the flange plates (17) of adjacent H-beam support standard parts (1) are connected to the flange connection system (2) in a limited position. The transverse connection of the H-shaped steel support standard component (1) is achieved by pin-connecting the H-shaped steel support standard component (1) with the transverse tie rod system (5) and the diagonal tie rod system (7). The flange connection system (2) comprises a flange node plate (21) and a clamp (24), wherein one end of the flange node plate (21) is bolted to the flange plate (17) of the H-shaped steel support standard component (1), and the other end is matched with the clamp (24) and then plugged into and slidably connected with the flange plate (17) of the adjacent H-shaped steel support standard component (1). The flange gusset plate (21) adopts a T-shaped structure with protrusions on both sides of one end, a protrusion is provided on one side of the clamp (24) in the vertical direction, and a penetrating clamp connection hole (25) is provided at the protrusion of the clamp (24). The clamp (24) is bolted to the protrusion of the flange gusset plate (21) by a clamp connection bolt (26) passing through the clamp connection hole (25), and the number of the clamp connection bolts (26) is not less than 2. A gap for inserting the flange plate (17) is left between the other side of the clamp (24) and the flange gusset plate (21). The transverse tie rod system (5) comprises two transverse tie rods (3) and a transverse tie rod internal thread outer sleeve (6), wherein the transverse tie rod (3) comprises two transverse tie rod bifurcated rods (31) forming a Y-shaped structure and a transverse tie rod horizontal rod (32) connecting the two transverse tie rod bifurcated rods (31) at one point. The oblique tie rod system (7) comprises two oblique tie rods (4) and an oblique tie rod internal thread outer sleeve (8), wherein the oblique tie rod (4) adopts an oblique tie rod connecting rod (41) forming a straight-line structure. The two transverse tie rod bifurcated rods (31) are provided with transverse tie rod socket sleeves (33) perpendicular thereto at one end away from the transverse tie rod horizontal rod (32). One end of the oblique tie rod connecting rod (41) is provided with an oblique tie rod socket sleeve (42) perpendicular thereto. The inner diameters of the transverse tie rod socket sleeve (33) and the oblique tie rod socket sleeve (42) are the same as the diameter of the tie rod connection hole (13), and the transverse tie rod socket sleeve (33), the oblique tie rod socket sleeve (42) and the tie rod connection hole (13) form a pin shaft fit through the latch pin (10).

2. The assembled composite steel support structure according to claim 1 is characterized in that: A monitoring sleeve system (9) for monitoring the axial force of the combined steel support is provided between the H-shaped steel connection end plates (11) at both ends of the adjacent H-shaped steel support standard parts (1), wherein the monitoring sleeve system (9) comprises a monitoring sleeve A and a monitoring sleeve B that are plugged into and matched with each other, wherein the monitoring sleeve A comprises a monitoring sleeve connection end plate A (91), a square sleeve A (93) and a circular sleeve A (95), and the monitoring sleeve B comprises a monitoring sleeve connection end plate B (92), a square sleeve B (94), a circular sleeve B (96) and a short stiffening rib (97); One side of the monitoring casing connection end plate A (91) and the monitoring casing connection end plate B (92) are respectively fixed to the adjacent H-shaped steel connection end plate (11), and the H-shaped steel connection end plate (11) is provided with a flange connection hole (15) which is bolted with the monitoring casing connection end plate A (91) and the monitoring casing connection end plate B (92) through the end plate connection bolts (18), and the number of the end plate connection bolts (18) is not less than 4 and is regularly distributed.

3. The assembled composite steel support structure according to claim 2 is characterized in that: The square sleeve A (93) and the circular sleeve A (95) are fixed to the other side of the monitoring sleeve connection end plate A (91), and the circular sleeve A (95) is located inside the square sleeve A (93); the square sleeve B (94), the circular sleeve B (96) and the short stiffening rib (97) are fixed to the other side of the monitoring sleeve connection end plate B (92), and the circular sleeve B (96) is located inside the square sleeve B (94); the short stiffening rib (97) is used to connect the square sleeve B (94) and the circular sleeve B (96); The square sleeve A (93) is inserted into the outside of the square sleeve B (94) and the square sleeve A (93) and the square sleeve B (94) are fitted together, and the round sleeve B (96) is inserted into the outside of the round sleeve A (95) and the round sleeve A (95) and the round sleeve B (96) are fitted together to form the monitoring sleeve A and the monitoring sleeve B being plugged into each other.

4. The assembled composite steel support structure according to claim 1 is characterized in that: The flange gusset plate (21) is provided with a gusset plate connection hole (23) at one end away from the protruding portion. The flange plate (17) is provided with a flange bolt hole (12) through which a gusset plate connection bolt (22) and a gusset plate connection hole (23) are bolted together, and the number of gusset plate connection bolts (22) on a single side of the flange gusset plate (21) and the flange plate (17) in the axial direction is not less than 4; The thickness of the flange node plate (21) and the clamp (24) are both greater than the thickness of the flange plate (17), and the length of the flange node plate (21) does not exceed the spacing between adjacent tie rod connection holes (13).

5. The assembled composite steel support structure according to claim 1 is characterized in that: The connecting ends of the two horizontal transverse tie rods (32) are provided with transverse tie rod length adjustment screws (34), and the two transverse tie rod length adjustment screws (34) and the transverse tie rod internal thread outer sleeve (6) form a transverse tie rod length adjustment device that is threadedly matched, and the two transverse tie rod length adjustment screws (34) are provided with reverse-threads of a certain length, and the transverse tie rod internal thread outer sleeve (6) is provided with internal threads that match the reverse-threads; The connecting ends of the two oblique tie rod connecting rods (41) are provided with oblique tie rod length adjustment screws (43), and the two oblique tie rod length adjustment screws (43) and the oblique tie rod internal thread outer sleeve (8) form an oblique tie rod length adjustment device that is threadedly matched; the two oblique tie rod length adjustment screws (43) are provided with reverse-threads of a certain length, and the oblique tie rod internal thread outer sleeve (8) is provided with internal threads that match the reverse-threads.

6. The assembled composite steel support structure according to claim 1 is characterized in that: The tie rod connection hole (13) is arranged at 1 / 4 of the distance from the edge on both sides of the flange plate (17) in the horizontal direction, and both sides of the tie rod connection hole (13) are provided with short stiffening plates (14) at both ends of the connection hole arranged vertically. The short stiffening plates (14) at both ends of the connection hole are fixedly connected to the web plate (16) and the flange plate (17) at one end.

7. The assembled composite steel support structure according to claim 1 is characterized in that: The total vertical length of the two transverse tie rod bifurcated rods (31) is equal to the distance between the inner walls of the flange plates (17) at both ends in the vertical direction. The sum of the heights of the two transverse tie rod socket sleeves (33) and the height of the oblique tie rod socket sleeve (42) are both equal to 1 / 2 of the distance between the inner walls of the flange plates (17) at both ends in the vertical direction, and the height of the oblique tie rod socket sleeve (42) is equal to the distance between the two transverse tie rod socket sleeves (33). The thickness of the transverse tie rod socket sleeve (33) and the oblique tie rod socket sleeve (42) is greater than the thickness of the flange plate (17).

8. The assembled composite steel support structure according to claim 1 is characterized in that: The middle section of the transverse tie rod internal thread outer sleeve (6) is provided with a transverse tie rod tightening structure (61) for facilitating the turning of a knob and a transverse tie rod stress monitoring device (62) for facilitating the application of prestress on site. The middle section of the oblique tie rod internal thread outer sleeve (8) is provided with an oblique tie rod tightening structure (81) for facilitating the turning of a knob and an oblique tie rod stress monitoring device (82) for facilitating the application of prestress on site.

9. The assembled composite steel support structure according to claim 1, characterized in that: The cross-section of the transverse tie rod (3) or the oblique tie rod (4) is H-shaped, circular or other regular cross-section.

10. The method for connecting the assembled composite steel support structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Place the ends of H-beam support standard parts (1) of the same specification opposite to each other, connect the H-beam connection end plate (11) of one H-beam support standard part (1) to the monitoring sleeve A through the end plate connection bolts (18), and connect the adjacent H-beam connection end plate (11) of the other H-beam support standard part (1) to the monitoring sleeve B, then place the detection element into the circular sleeve A (95), and then plug and match the monitoring sleeve A and the monitoring sleeve B, then plug and match one side of the flange node plate (21) and the clamp (24) with the flange plate (17) of the H-beam support standard part (1) and then slide and connect, and bolt the other side to the flange plate (17) of the adjacent H-beam support standard part (1) through the node plate connection bolts (22), thereby completing the axial connection of the H-beam support standard part (1); S2. Place the array of H-shaped steel support standard parts (1) that have been axially connected in sequence in the horizontal direction, align the transverse tie rod socket sleeve (33) with the tie rod connection hole (13), insert the pin (10) for temporary fixation, then pull out the temporary fixation pin (10), install the oblique tie rod socket sleeve (42) to the middle position of the transverse tie rod socket sleeve (33) and align them, insert the pin (10) for formal fixation, and complete the transverse connection of the H-shaped steel support standard parts (1); S3. The length of the transverse tie rod system (5) and the diagonal tie rod system (7) is adjusted and prestress is applied to eliminate installation gaps and form a structurally complete truss structure.

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