CN113431052A - Foundation pit prestress steel supporting system - Google Patents
Foundation pit prestress steel supporting system Download PDFInfo
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- CN113431052A CN113431052A CN202110829890.7A CN202110829890A CN113431052A CN 113431052 A CN113431052 A CN 113431052A CN 202110829890 A CN202110829890 A CN 202110829890A CN 113431052 A CN113431052 A CN 113431052A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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Abstract
The application provides a foundation ditch prestressing force steel braced system includes: the two ends of the tensioning unit are respectively provided with a prestress supporting unit; the end plate is arranged at one end of the prestress supporting unit far away from the tensioning unit; the foundation pit earthwork side support unit is arranged on the end plate; the bottom bracing unit is arranged on the foundation pit earthwork side bracing unit, and the top of the bottom bracing unit is connected with the prestressed supporting unit; the two ends of the arch supporting unit are respectively arranged on the two end plates, and the lower side of the middle part of the arch supporting unit is respectively connected with the prestress supporting unit; and the reinforced anchor rod unit is arranged on the foundation pit earthwork side support unit. Can used repeatedly, the back supporting force degree of installing simultaneously can be adjusted, can improve prestressing force's supporting force degree according to actual conditions, and can improve the firm degree of being connected of girder and foundation ditch lateral wall, ensures braced system's reliability.
Description
Technical Field
The application relates to the field of foundation pit supporting equipment, in particular to a foundation pit prestress steel supporting system.
Background
At present, in order to ensure the safety of the construction of an underground structure and the surrounding environment of a foundation pit, the side wall and the surrounding environment of the foundation pit need to be supported, reinforced and protected.
The patent with the application number of 202110126550.8 in the prior art provides a prestressed steel supporting system for a deep foundation pit, which comprises a plurality of prestressed beams, a supporting frame and a supporting frame, wherein the prestressed beams are arranged on the inner side of a structural beam and are distributed at intervals in the circumferential direction; the prestressed beam comprises a plurality of connecting beams fixedly arranged on the inner side of the structural beam and a pull rod movably connected to one end of the connecting beam far away from the structural beam through a cable joint node; the stay cable joint node comprises a protection pipe shell fixedly arranged at one end of the connecting beam far away from the structural beam, and a spherical clamping part used for supporting the pull rod is arranged on the inner side of the protection pipe shell;
although the supporting device can be repeatedly used, the supporting force cannot be adjusted after installation, the supporting force of prestress cannot be increased according to specific conditions, and the connection between the girder and the side wall of the foundation pit is not firm enough after installation.
Disclosure of Invention
The application provides a foundation ditch prestressing force steel braced system, can used repeatedly, the back dynamics of supporting of installing simultaneously can be adjusted, can improve prestressing force's supporting dynamics according to actual conditions, and can improve the firm degree of being connected of girder and foundation ditch lateral wall, ensures braced system's reliability to improve above-mentioned problem.
The invention is particularly such that: a foundation pit prestressed steel braced system, comprising:
the two ends of the tensioning unit are respectively provided with a prestress supporting unit;
the end plate is arranged at one end of the prestress supporting unit far away from the tensioning unit;
the foundation pit earthwork side support unit is arranged on the end plate;
the bottom bracing unit is arranged on the foundation pit earthwork side bracing unit, and the top of the bottom bracing unit is connected with the prestressed supporting unit;
the two ends of the arch supporting unit are respectively arranged on the two end plates, and the lower side of the middle part of the arch supporting unit is respectively connected with the prestress supporting unit;
and the reinforced anchor rod unit is arranged on the foundation pit earthwork side support unit.
Can bulldoze the prestressing force supporting element of both sides through the tensioning unit, thereby carry out the increase of prestressing force support dynamics through the end plate to the lateral wall of foundation ditch, improve the supporting effect, avoid becoming flexible, foundation ditch earthwork side props the area of contact that the unit can increase end plate and foundation ditch lateral wall, improve the supporting effect, end props tight unit and can consolidate prestressing force supporting element, ensure the intensity that whole girder and foundation ditch lateral wall are connected, it is located the girder hoisting that the domes supported the unit formed prestressing force supporting element and tensioning unit to encircle supporting element, avoid the girder middle part to move down, strengthen the stock unit and can improve the firm in connection of foundation ditch earthwork side props unit and foundation ditch lateral wall, avoid the circumstances that foundation ditch earthwork side props the unit and appear moving down, ensure braced system's stability.
Furthermore, the prestress supporting unit comprises a rectangular supporting frame, inner supporting rods, a connecting block, triangular clamping blocks, mounting holes, triangular clamping grooves, fixing columns and fixing nuts, the inner supporting rods which are staggered with each other are arranged in the rectangular supporting frame, the middle parts of the two ends of the rectangular supporting frame are respectively provided, the triangular clamping grooves are formed in one end of the rectangular supporting frame through the mounting holes, the other end of the rectangular supporting frame is connected with the triangular clamping blocks through the connecting block, the adjacent rectangular supporting frames are connected together through the triangular clamping blocks and the triangular clamping grooves in a clamping mode, the fixing columns are fixed to the middle parts of one side of the end plates, and the fixing columns penetrate through the mounting holes in the rectangular supporting frame at the end part and are connected with the fixing nuts through threads.
A plurality of rectangle carriage can conveniently splice through the triangle joint piece and the triangle draw-in groove of joint to be convenient for used repeatedly and transport, the structural strength of rectangle carriage can be improved through alternately setting up interior vaulting pole, reliability when increasing the support can be fixed the rectangle carriage on the end plate through fixed column and fixation nut's cooperation.
Furthermore, prestressing force supporting unit still includes spliced pole, well packing ring, end packing ring and coupling nut, and the spliced pole has been alternate to the mounting hole that adjacent rectangle carriage is close to, the spliced pole is located and has cup jointed well packing ring between two adjacent rectangle carriages, and the both ends of spliced pole extend to the inboard of two rectangle carriages respectively and have cup jointed the end packing ring respectively, and the both ends of spliced pole still threaded connection have the coupling nut who compresses tightly the end packing ring. The joint strength of adjacent rectangle carriage can be strengthened through the spliced pole, and the hole can be reduced through well packing ring, improves the firm degree of connection, can be with the firm installation of spliced pole through end packing ring and coupling nut.
Furthermore, the tensioning unit comprises a disassembling transverse plate, a disassembling column, a disassembling nut, a hinged support I, a tensioning movable rod, a screw hole block, a hinged support II, a middle column, a threaded rod, a spoke rod, a ring and a handle sleeve, wherein the front end and the rear end of the middle column are respectively connected with the threaded rod, the thread directions on the two threaded rods are opposite, the two threaded rods are respectively in threaded connection with the corresponding screw hole blocks, the two sides of the two threaded rods are respectively movably connected with one end of the tensioning movable rod through the support II, the two tensioning movable rods on the left side are respectively movably connected with the disassembling transverse plate on the left side through the hinged support I, the two tensioning movable rods on the right side are respectively movably connected with the disassembling transverse plate on the right side through the hinged support I, the disassembling column is respectively fixed on one side of the two disassembling transverse plates far away from the tensioning movable rod, the disassembling column penetrates through the mounting hole at the end part of the corresponding rectangular support frame and is in threaded connection with the disassembling nut, the end of one of the threaded rods is connected with the ring through the spoke rods with equal angles, and the end of the spoke rod penetrates through the side face of the ring and is sleeved with the handle sleeve.
Make things convenient for the handheld rotation spoke pole of workman and ring through the barre, thereby drive two threaded rods and the intermediate strut and rotate, two screw blocks are close to each other or keep away from each other this moment, at the in-process that two screw blocks are close to each other, can push away two through the tensioning movable rod and dismantle the diaphragm and keep away from each other, will dismantle the diaphragm through dismantling the post and dismantle the nut and fix on the rectangle carriage, two dismantlement diaphragms are kept away from each other and can be made two prestressing force supporting unit increase the lateral wall support dynamics of foundation ditch.
Further, foundation ditch earthwork side props the unit and includes side shield, long post and stop nut, the side of end plate transversely alternates to have and is no less than two long posts, the tip of long post passes the through-hole and the threaded connection of side shield side respectively and has stop nut. The long column and the limiting nut are used for fixing the side baffle on the side face of the end plate, so that the contact area between the side baffle and the side wall of the foundation pit is increased.
Further, foundation ditch earthwork side props unit still includes baffle, go-between, construction bolt, enhancement down tube, end and connects the piece and end to connect the bolt down, the below of end plate is equipped with down the baffle, the upper end of end connecing the piece connects the side of bolt fastening at the end plate through end, and connects the side of bolt fastening baffle under through end in the upper end of end connecing the piece, the both ends of enhancement down tube are equipped with the go-between respectively, and a go-between passes through construction bolt fastening in the side of side shield, and another go-between passes through construction bolt fastening in the side of baffle down.
Connect the piece and connect the bolt at the bottom through the end and can fix baffle detachable down in the below of end plate, connect baffle and side shield down respectively through go-between and construction bolt with strengthening the down tube simultaneously, increase the wholeness, improve structural strength.
Furthermore, the bottom bracing unit comprises a mounting transverse plate, a bracing bolt, a twisting block, a bracing block, a mounting arc block, a first movable shaft, a bottom bracing rod, a mounting seat and a second movable shaft, wherein the mounting transverse plate is fixed at two ends of the side surface of the lower baffle respectively, a vertical bracing bolt is connected to a screw hole in the mounting transverse plate in an internal thread manner, the bottom end of the bracing bolt is connected with the twisting block, the top end of the bracing bolt is rotatably connected with the bracing block, the mounting arc block is arranged on the bracing block and movably connected with the bottom end of the bottom bracing rod through the first movable shaft, the top end of the bottom bracing rod is movably connected with the mounting seat through the second movable shaft, and the two mounting seats are respectively fixed at the bottom of the rectangular supporting frame close to the end plate.
The twisting block can drive the tightening bolt to rotate, the tightening bolt can push the support block to move upwards due to the threaded action of the installation transverse plate, and therefore greater supporting force is applied to the bottom of the rectangular support frame through the bottom support rods with both ends movably connected, assembly holes caused by the existence of gaps in the assembly process can be avoided, and supporting stability is improved.
Further, it includes crossbeam, floor, an arch supporting beam, pull rod, tip sliding connection subassembly and middle part sliding connection subassembly to encircle the supporting unit, and the top of two end plates is equipped with the crossbeam respectively, the bottom of crossbeam is passed through the floor and is connected with the top side enhancement of end plate, an arch supporting beam's both ends are passed through tip sliding connection subassembly and are connected the crossbeam, and an arch supporting beam's downside middle part is equipped with the pull rod that corresponds with every rectangle carriage respectively, and the rectangle carriage that corresponds is connected through middle part sliding connection subassembly in the bottom of every pull rod. The structure of an arch bridge can be simulated through the arch supporting beam, the stability of the rectangular supporting frames is improved, the connection strength of the cross beam and the end plates can be improved through the rib plates, and the force is provided for each rectangular supporting frame through the pull rod.
Further, tip sliding connection subassembly includes dovetail and forked tail slider, horizontal dovetail has been seted up on the crossbeam, arched support beam's both ends are equipped with forked tail slider respectively, forked tail slider and dovetail transverse sliding connection. The end connection of the cross beam and the arched supporting beam can be provided with sliding performance through the dovetail groove and the dovetail sliding block, and the end plate is driven to move relative to the arched supporting beam after the tensioning unit works, so that the arched supporting beam still can play a role after the relative movement is ensured.
Further, middle part sliding connection subassembly includes atress vertical pole, horizontal spout, draws piece and slider, and the bottom of every pull rod is equipped with fore-and-aft atress vertical pole respectively, the bottom front and back end of atress vertical pole is connected with the slider through drawing the piece respectively, horizontal spout has been seted up respectively to the front and back side of rectangle carriage, horizontal spout and the slider sliding connection that corresponds. The pull block and the slide block on the lower side of the stressed longitudinal rod play a role in pulling the rectangular supporting frame, and the slide block and the transverse sliding groove enable the arched supporting beam and the rectangular supporting frame to be relatively moved and then still have a role in pulling the rectangular supporting frame.
The invention has the beneficial effects that:
according to the foundation pit prestress steel supporting system, the prestress supporting units on the two sides can be pushed and pressed through the tensioning units, so that the prestress supporting force is increased on the side wall of a foundation pit through the end plate, the supporting effect is improved, looseness is avoided, the contact area between the end plate and the side wall of the foundation pit can be increased through the foundation pit earthwork side supporting unit, and the supporting effect is improved;
according to the foundation pit prestress steel supporting system, the bottom bracing unit can reinforce the prestress supporting unit to ensure the connection strength of the whole girder and the side wall of the foundation pit, the arch supporting unit is positioned in the arch structure to hoist the girder formed by the prestress supporting unit and the tensioning unit to prevent the middle part of the girder from moving downwards, the reinforcing anchor rod unit can improve the connection firmness of the foundation pit earthwork side bracing unit and the side wall of the foundation pit, the foundation pit earthwork side bracing unit is prevented from moving downwards, and the stability of the supporting system is ensured;
this foundation ditch prestress steel braced system can used repeatedly, and the back bracing dynamics of installing simultaneously can be adjusted, can improve prestressing force's support dynamics according to actual conditions, and can improve the firm degree of being connected of girder and foundation ditch lateral wall, ensures braced system's reliability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic view of an overall structure of a foundation pit prestressed steel supporting system provided by the present application;
fig. 2 is a schematic view of a partially enlarged structure at a position a in fig. 1 of a foundation pit prestressed steel supporting system provided by the present application;
fig. 3 is a left partial structural schematic view of the foundation pit prestressed steel supporting system provided by the present application in fig. 1;
fig. 4 is a schematic view of a partially enlarged structure at a position B in fig. 3 of the foundation pit prestressed steel supporting system provided by the present application;
fig. 5 is a schematic view of a partially enlarged structure at a position C in fig. 3 of the foundation pit prestressed steel supporting system provided by the present application;
fig. 6 is a schematic sectional structure view of a reinforced anchor rod unit of a foundation pit prestressed steel supporting system provided by the present application.
Icon: 1 end plate, 2 prestress supporting units, 21 rectangular supporting frames, 22 inner supporting rods, 23 connecting blocks, 24 triangular clamping blocks, 25 mounting holes, 26 triangular clamping grooves, 27 connecting columns, 28 middle gaskets, 29 end gaskets, 210 connecting nuts, 211 fixing columns, 212 fixing nuts, 3 reinforcing units, 31 arc-shaped reinforcing rods, 32 connecting bolts, 33 connecting plates, 34V-shaped reinforcing rods, 35 square clamping blocks, 4 foundation pit earthwork side supporting units, 41 side baffle plates, 42 long columns, 43 limiting nuts, 44 lower baffle plates, 45 connecting rings, 46 mounting bolts, 47 reinforcing inclined rods, 48 bottom connecting blocks, 49 bottom connecting bolts, 5 bottom supporting units, 51 mounting transverse plates, 52 supporting bolts, 53 twisting blocks, 54 supporting blocks, 55 mounting arc-shaped blocks, 56 movable shafts I, 57 bottom supporting rods, 58 mounting seats, 59 movable shafts II, 6 tensioning units, 61 dismounting transverse plates, 62 dismounting columns, 63 dismounting nuts, 64 hinged supports I, 65 tensioning movable rods, 66 threaded hole blocks, 67 hinge support II, 68 middle columns, 69 threaded rods, 610 spoke rods, 611 circular rings, 612 handle sleeves, 7 arch supporting units, 71 cross beams, 72 dovetail grooves, 73 dovetail sliding blocks, 74 ribbed plates, 75 arch supporting beams, 76 pull rods, 77 stressed longitudinal rods, 78 cross sliding grooves, 79 pull blocks, 710 sliding blocks, 8 reinforcing anchor rod units, 81 anchor columns, 82 limiting caps, 83 bearings, 84 hexagonal blocks, 85 twisting screw rods, 86 internal connecting blocks, 87 hinge support III, 88 movable nuts, 89 hinge support IV, 810 control rods, 811 reinforcing insertion rods, 812 hinge support V, 813 side through grooves and 814 conical heads.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example (b):
in a first embodiment, referring to fig. 1-6, a supporting system for supporting prestressed steel in a foundation pit includes:
a tension unit 6, both ends of which are respectively provided with a prestress supporting unit 2;
prestressing force supporting element 2 includes rectangle carriage 21, interior vaulting pole 22, connecting block 23, triangle joint piece 24, mounting hole 25, triangle draw-in groove 26, fixed column 211 and fixation nut 212, be equipped with crisscross interior vaulting pole 22 each other in the rectangle carriage 21, rectangle carriage 21's both ends middle part has been seted up respectively, triangle draw-in groove 26 has been seted up to mounting hole 25 rectangle carriage 21's one end, rectangle carriage 21's the other end is connected with triangle joint piece 24 through connecting block 23, adjacent rectangle carriage 21 links together through the joint of triangle joint piece 24 and triangle draw-in groove 26, one side middle part of end plate 1 is fixed with fixed column 211, fixed column 211 passes mounting hole 25 and threaded connection on the rectangle carriage 21 of tip has fixation nut 212.
A plurality of rectangle carriage 21 can conveniently splice through the triangle joint piece 24 and the triangle draw-in groove 26 of joint to be convenient for used repeatedly and transport, interior vaulting pole 22 through alternately setting up can improve rectangle carriage 21's structural strength, reliability when increasing the support, can fix rectangle carriage 21 on end plate 1 through the cooperation of fixed column 211 and fixation nut 212.
The tensioning unit 6 comprises a disassembling transverse plate 61, a disassembling column 62, a disassembling nut 63, a hinged support I64, a tensioning movable rod 65, screw hole blocks 66, a hinged support II 67, a middle column 68, a threaded rod 69, a spoke rod 610, a ring 611 and a handle sleeve 612, wherein the front end and the rear end of the middle column 68 are respectively connected with the threaded rod 69, the thread directions on the two threaded rods 69 are opposite, the two threaded rods 69 are respectively in threaded connection with the corresponding screw hole blocks 66, two sides of the two threaded rods 66 are respectively movably connected with one end of the tensioning movable rod 65 through the support II 67, the two tensioning movable rods 65 on the left side are respectively movably connected with the disassembling transverse plate 61 on the left side through the hinged support I64, the two tensioning movable rods 65 on the right side are respectively movably connected with the disassembling transverse plate 61 on the right side through the hinged support I64, the disassembling columns 62 are respectively fixed on one sides of the two transverse plate disassembling transverse plates 61 far away from the tensioning movable rods 65, the disassembling columns 62 penetrate through the corresponding mounting holes 25 at the end parts of the rectangular support frames 21 and are in threaded connection with the disassembling nuts 63, the end of one of the threaded rods 69 is connected to the ring 611 by means of a spoke 610 of equal angle, and the end of the spoke 610 passes through the side of the ring 611 and is sleeved with a grip 612.
Make things convenient for the handheld spoke pole 610 and the ring 611 of rotating of workman through cover 612, thereby drive two threaded rods 69 and intermediate strut 68 and rotate, two screw hole pieces 66 are close to each other or keep away from each other this moment, at the in-process that two screw hole pieces 66 are close to each other, can push away two through tensioning movable rod 65 and dismantle diaphragm 61 and keep away from each other, will dismantle diaphragm 61 through dismantling post 62 and dismantlement nut 63 and fix on rectangle carriage 21, two are dismantled diaphragm 61 and keep away from each other and can make two prestressing force support unit 2 increase the lateral wall support dynamics of foundation ditch.
An end plate 1 installed at one end of the prestressed supporting unit 2 far from the tension unit 6;
the foundation pit earthwork side support unit 4 is arranged on the end plate 1;
foundation ditch earthwork side supporting unit 4 includes side shield 41, long post 42 and stop nut 43, and the side of end plate 1 transversely alternates to have and is no less than two long posts 42, and the through-hole and the threaded connection that the side of side shield 41 was passed respectively to the tip of long post 42 have stop nut 43. The long posts 42 and the stop nuts 43 are used to fix the side guards 41 to the side surfaces of the end plates 1, thereby increasing the contact area with the side walls of the foundation pit.
The foundation pit earthwork side support unit 4 further comprises a lower baffle 44, a connecting ring 45, a mounting bolt 46, a reinforcing diagonal rod 47, a bottom connecting block 48 and a bottom connecting bolt 49, the lower part of the end plate 1 is provided with the lower baffle 44, the upper end of the bottom connecting block 48 is fixed on the side surface of the end plate 1 through the bottom connecting bolt 49, the upper end of the bottom connecting block 48 is fixed on the side surface of the lower baffle 44 through the bottom connecting bolt 49, the two ends of the reinforcing diagonal rod 47 are respectively provided with the connecting ring 45, one connecting ring 45 is fixed on the side surface of the side baffle 41 through the mounting bolt 46, and the other connecting ring 45 is fixed on the side surface of the lower baffle 44 through the.
The lower baffle plate 44 can be detachably fixed below the end plate 1 through the bottom connecting block 48 and the bottom connecting bolt 49, and meanwhile, the reinforcing inclined rod 47 is respectively connected with the lower baffle plate 44 and the side baffle plate 41 through the connecting ring 45 and the mounting bolt 46, so that the integrity is increased, and the structural strength is improved.
The bottom bracing unit 5 is arranged on the foundation pit earthwork side bracing unit 4, and the top of the bottom bracing unit 5 is connected with the prestress supporting unit 2;
the bottom bracing unit 5 comprises an installation transverse plate 51, bracing bolts 52, a twisting block 53, bracing blocks 54, installation arc-shaped blocks 55, a first movable shaft 56, bottom bracing rods 57, installation seats 58 and a second movable shaft 59, the installation transverse plate 51 is fixed at two ends of the side surface of the lower baffle plate 44 respectively, the vertical bracing bolts 52 are in threaded connection with screw holes in the installation transverse plate 51, the bottom ends of the bracing bolts 52 are connected with the twisting blocks 53, the top ends of the bracing blocks are rotatably connected with the bracing blocks 54, the installation arc-shaped blocks 55 are arranged on the bracing blocks 54, the installation arc-shaped blocks 55 are movably connected with the bottom ends of the bottom bracing rods 57 through the first movable shaft 56, the top ends of the bottom bracing rods 57 are movably connected with the installation seats 58 through the second movable shaft 59, and the two installation seats 58 are fixed at the bottoms of the rectangular supporting frames 21 close to the end plate 1 respectively.
The twisting and twisting block 53 can drive the supporting bolt 52 to rotate, the supporting bolt 52 can push the supporting block 54 to move upwards due to the thread action with the installation transverse plate 51, so that the bottom supporting rod 57 movably connected at two ends can apply larger supporting force to the bottom of the rectangular supporting frame 21, the assembly hole caused by the existence of the gap in the assembly process can be avoided, and the supporting stability is improved.
The two ends of the arch supporting unit 7 are respectively arranged on the two end plates 1, and the lower side of the middle part of the arch supporting unit 7 is respectively connected with the prestress supporting unit 2;
The end sliding connection assembly comprises a dovetail groove 72 and a dovetail slide block 73, a transverse dovetail groove 72 is formed in the cross beam 71, the dovetail slide blocks 73 are respectively arranged at two ends of the arched support beam 75, and the dovetail slide blocks 73 are in transverse sliding connection with the dovetail groove 72. The dovetail groove 72 and the dovetail slider 73 can make the end connection of the beam 71 and the arched support beam 75 have sliding property, and the end plate 1 is driven to move relative to the arched support beam 75 after the tensioning unit 6 works, so that the arched support beam 75 can still function after the relative movement.
The middle sliding connection assembly comprises stressed longitudinal rods 77, transverse sliding grooves 78, pulling blocks 79 and sliding blocks 710, the bottom of each pulling rod 76 is provided with the longitudinal stressed longitudinal rod 77, the front end and the rear end of the bottom of each stressed longitudinal rod 77 are connected with the sliding blocks 710 through the pulling blocks 79, the front side and the rear side of the rectangular support frame 21 are provided with the transverse sliding grooves 78, and the transverse sliding grooves 78 are in sliding connection with the corresponding sliding blocks 710. The pulling block 79 and the sliding block 710 on the lower side of the stressed vertical rod 77 exert a pulling force on the rectangular supporting frame 21, and the sliding block 710 and the transverse sliding groove 78 make the arched supporting beam 75 and the rectangular supporting frame 21 move relatively and still exert a pulling force on the rectangular supporting frame 21. And the reinforcing anchor rod unit 8 is installed on the foundation pit earthwork side support unit 4.
Can bulldoze the prestressing force support element 2 of both sides through tensioning unit 6, thereby carry out the increase of prestressing force support dynamics through end plate 1 to the lateral wall of foundation ditch, improve the supporting effect, avoid becoming flexible, foundation ditch earthwork side props unit 4 can increase the area of contact of end plate 1 and foundation ditch lateral wall, improve the supporting effect, end props tight unit 5 and can consolidate prestressing force support element 2, ensure the intensity that whole girder is connected with the foundation ditch lateral wall, it is located the girder hoisting that arched structure formed prestressing force support element 2 and tensioning unit 6 to encircle supporting element 7, avoid the girder middle part to move down, strengthen stock unit 8 and can improve the firm in connection of foundation ditch earthwork side props unit 4 and foundation ditch lateral wall, avoid foundation ditch earthwork side props the condition that unit 4 appears moving down, ensure braced system's stability.
In a second embodiment, referring to fig. 3, a foundation pit prestressed steel supporting system is substantially the same as the above embodiments in structure, and the difference is:
the prestressed supporting unit 2 further comprises a connecting column 27, a middle washer 28, an end washer 29 and a connecting nut 210, the connecting column 27 is inserted into the mounting hole 25 close to the adjacent rectangular supporting frames 21, the connecting column 27 is located between the two adjacent rectangular supporting frames 21 and is sleeved with the middle washer 28, two ends of the connecting column 27 respectively extend to the inner sides of the two rectangular supporting frames 21 and are respectively sleeved with the end washer 29, and two ends of the connecting column 27 are further connected with the connecting nut 210 compressing the end washer 29 in a threaded manner. The connecting strength of the adjacent rectangular supporting frames 21 can be enhanced through the connecting columns 27, the holes can be reduced through the middle washers 28, the connecting firmness is improved, and the connecting columns 27 can be firmly installed through the end washers 29 and the connecting nuts 210.
In a third embodiment, referring to fig. 1 and 6, a foundation pit prestressed steel supporting system is substantially the same in structure as the above embodiments, and the difference is that:
the reinforced anchor rod unit 8 comprises an anchor column 81, a limit cap 82, a bearing 83, a hexagonal block 84, a twisting screw 85, an inner connecting block 86, a hinged support three 87, a movable nut 88, a hinged support four 89, a control rod 810, a reinforced insert rod 811, a hinged support five 812, a side through groove 813 and a conical head 814, wherein the anchor column 81 is inserted in a through hole in the middle of a side baffle 41, one end of the anchor column 81 close to the tensioning unit 6 is connected with the limit cap 82 for limiting and fixing the side baffle 41, the other end of the anchor column 81 is connected with the conical head 814 and is conveniently inserted into a soil layer on the side wall of a foundation pit, the inside of the anchor column 81 is hollow, the side through grooves 813 communicating the inside are arranged on two sides of the anchor column 81, the inner connecting blocks 86 are respectively arranged at one ends of the inner connecting blocks 813 close to the limit cap 82, the two inner connecting blocks 86 are respectively movably connected with one ends of the two reinforced insert rods 811 through the hinged support three 87, the middle of the limit cap 82 is rotatably connected with the twisting screw 85 through the bearing 83, the end of the twist screw 85, which is positioned at the outer side of the limit cap 82, is connected with the hexagonal block 84, the other end of the twist screw 85 is positioned inside the anchor post 81 and is in threaded connection with the movable nut 88, the two sides of the movable nut 88 are respectively and movably connected with one end of two control rods 810 through the hinge support four 89, the other ends of the two control rods 810 are respectively and movably connected with the inner sides of two reinforcing insertion rods 811 through the hinge support five 812, the anchor post 81 can be transversely inserted into the side soil layer of the foundation pit through the limit cap 82, then the twist hexagonal block 84 drives the twist screw 85 to rotate, because the installation of the control rods 810 makes the movable nut 88 incapable of rotating along with the twist screw 85 due to friction force, the movable nut 88 moves left and right along the twist screw 85, meanwhile, the reinforcing insertion rods 811 are pushed or pulled to move through the control rods 810, when the reinforcing insertion rods 811 are pushed, the reinforcing insertion rods 811 move, the reinforcing insertion rods 811 extend out of the side through grooves 813, the anchor post 81 is inserted into the soil layer to stabilize the position of the anchor post 81 in the soil layer, and when the reinforcing insertion rod 811 is pulled to move, the reinforcing insertion rod 811 retracts into the side through groove 813, so that the anchor post 81 can be conveniently pulled out through the limiting cap 82.
In a fourth embodiment, referring to fig. 3, a foundation pit prestressed steel supporting system is substantially the same in structure as the above embodiments, and the difference is that: still including strengthening unit 3, strengthen unit 3 and include arc stiffener 31, connecting bolt 32 and connecting plate 33, the bottom both ends of arc stiffener 31 are equipped with connecting plate 33 respectively, and connecting plate 33 of arc stiffener 31 both sides passes through connecting bolt 32 and two adjacent rectangle carriage 21 tip fixed connection, can strengthen the connection dynamics of adjacent rectangle carriage 21, avoids two adjacent rectangle carriages 21 middle parts to cave in downwards.
In a fifth embodiment, referring to fig. 3, a foundation pit prestressed steel supporting system is substantially the same as the fourth embodiment in structure, and the difference is that: reinforcing unit 3 still includes V-arrangement stiffener 34 and square fixture block 35, the direction draw-in groove has been seted up respectively to adjacent rectangle carriage 21 side, the both ends of V-arrangement stiffener 34 are equipped with square fixture block 35 respectively, square fixture block 35 blocks into in the direction draw-in groove, the joint through direction draw-in groove and square fixture block 35 is to V-arrangement stiffener 34 fixed mounting, can provide the support dynamics for two adjacent rectangle carriage 21 junctions through V-arrangement stiffener 34 simultaneously, further avoid two adjacent rectangle carriages 21 middle parts to cave in downwards.
All parts used in the foundation pit prestress steel supporting system are made of steel, and the steel material is strong in toughness and good in supporting performance.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a foundation ditch prestress steel braced system which characterized in that includes:
the tensioning unit (6) is provided with a prestress supporting unit (2) at two ends respectively;
the end plate (1) is installed at one end, far away from the tensioning unit (6), of the prestress supporting unit (2);
the foundation pit earthwork side support unit (4) is arranged on the end plate (1);
the bottom bracing unit (5) is arranged on the foundation pit earthwork side bracing unit (4), and the top of the bottom bracing unit (5) is connected with the prestress supporting unit (2);
the two ends of the arch supporting unit (7) are respectively arranged on the two end plates (1), and the lower side of the middle part of the arch supporting unit (7) is respectively connected with the prestress supporting unit (2);
and the reinforcing anchor rod unit (8) is arranged on the foundation pit earthwork side support unit (4).
2. The foundation pit prestress steel supporting system according to claim 1, wherein the prestress supporting unit (2) comprises a rectangular supporting frame (21), inner supporting rods (22), a connecting block (23), triangular clamping blocks (24), a mounting hole (25), triangular clamping grooves (26), a fixing column (211) and a fixing nut (212), the inner supporting rods (22) which are staggered with each other are arranged in the rectangular supporting frame (21), the middle parts of two ends of the rectangular supporting frame (21) are respectively provided, the triangular clamping grooves (26) are provided at one end of the rectangular supporting frame (21) of the mounting hole (25), the other end of the rectangular supporting frame (21) is connected with the triangular clamping blocks (24) through the connecting block (23), the adjacent rectangular supporting frames (21) are connected together through the clamping of the triangular clamping blocks (24) and the triangular clamping grooves (26), the fixing column (211) is fixed at the middle part of one side of the end plate (1), the fixing column (211) penetrates through a mounting hole (25) in the rectangular supporting frame (21) at the end part and is in threaded connection with a fixing nut (212).
3. The foundation pit prestress steel supporting system according to claim 2, wherein the prestress steel supporting unit (2) further comprises a connecting column (27), a middle washer (28), an end washer (29) and a connecting nut (210), the connecting column (27) is inserted into the mounting hole (25) close to the adjacent rectangular supporting frames (21), the connecting column (27) is located between the two adjacent rectangular supporting frames (21) and sleeved with the middle washer (28), two ends of the connecting column (27) extend to the inner sides of the two rectangular supporting frames (21) respectively and sleeved with the end washer (29), and two ends of the connecting column (27) are further connected with the connecting nut (210) pressing the end washer (29) in a threaded manner.
4. The foundation pit prestress steel supporting system according to claim 2 or 3, wherein the tensioning unit (6) comprises a disassembling transverse plate (61), a disassembling column (62), a disassembling nut (63), a hinge support I (64), a tensioning movable rod (65), screw hole blocks (66), a hinge support II (67), a middle column (68), a threaded rod (69), a spoke rod (610), a ring (611) and a handle sleeve (612), the front end and the rear end of the middle column (68) are respectively connected with the threaded rod (69), the directions of the threads on the two threaded rods (69) are opposite, the two threaded rods (69) are respectively in threaded connection with the corresponding screw hole blocks (66), two sides of the two screw hole blocks (66) are respectively in movable connection with one end of the tensioning movable rod (65) through the support II (67), the two tensioning movable rods (65) on the left side are both in movable connection with the disassembling transverse plate (61) on the left side through the hinge support I (64), two tensioning movable rods (65) on right side all are through hinged-support one (64) and dismantlement diaphragm (61) swing joint on right side, and one side that tensioning movable rod (65) were kept away from in two dismantlement diaphragms (61) is fixed with respectively and dismantles post (62), the mounting hole (25) and threaded connection that dismantle post (62) passed corresponding rectangle carriage (21) tip have dismantlement nut (63), and the tip of one of them threaded rod (69) is through spoke pole (610) connection ring (611) of waiting the angle, and the tip of spoke pole (610) passes ring (611) side and cup jointed handle cover (612).
5. The foundation pit prestress steel supporting system according to claim 1, wherein the foundation pit earthwork side supporting unit (4) comprises a side baffle plate (41), long columns (42) and a limit nut (43), wherein no less than two long columns (42) are transversely inserted into the side surface of the end plate (1), and the end parts of the long columns (42) respectively penetrate through holes in the side surface of the side baffle plate (41) and are in threaded connection with the limit nut (43).
6. The foundation pit prestressed steel supporting system of claim 5, the foundation pit earthwork side support unit (4) also comprises a lower baffle (44), a connecting ring (45), a mounting bolt (46), a reinforcing diagonal rod (47), a bottom connecting block (48) and a bottom connecting bolt (49), a lower baffle (44) is arranged below the end plate (1), the upper end of the bottom connecting block (48) is fixed on the side surface of the end plate (1) through a bottom connecting bolt (49), and the upper end of the bottom connecting block (48) is fixed on the side surface of the lower baffle plate (44) through a bottom connecting bolt (49), two ends of the reinforced diagonal rod (47) are respectively provided with a connecting ring (45), one connecting ring (45) is fixed on the side surface of the side baffle plate (41) through a mounting bolt (46), and the other connecting ring (45) is fixed on the side surface of the lower baffle plate (44) through a mounting bolt (46).
7. The foundation pit prestress steel supporting system according to claim 6, wherein the bottom bracing unit (5) comprises a mounting transverse plate (51), a bracing bolt (52), a twisting block (53), a supporting block (54), a mounting arc block (55), a first movable shaft (56), a bottom supporting rod (57), a mounting seat (58) and a second movable shaft (59), the mounting transverse plate (51) is fixed at each of two ends of the side surface of the lower baffle plate (44), the vertical bracing bolt (52) is connected to a screw hole in the mounting transverse plate (51) in a threaded manner, the bottom end of the bracing bolt (52) is connected with the twisting block (53), the top end of the bracing bolt is rotatably connected with the supporting block (54), the mounting arc block (55) is arranged on the supporting block (54), the mounting arc block (55) is movably connected with the bottom end of the bottom supporting rod (57) through the first movable shaft (56), and the top end of the bottom supporting rod (57) is movably connected with the mounting seat (58) through the second movable shaft (59), the two mounting seats (58) are respectively fixed at the bottom of the rectangular supporting frame (21) close to the end plate (1).
8. The foundation pit prestress steel supporting system according to claim 2, wherein the arch supporting unit (7) comprises a cross beam (71), a rib plate (74), an arch supporting beam (75), a pull rod (76), an end sliding connection assembly and a middle sliding connection assembly, the cross beam (71) is arranged at the top of each of the two end plates (1), the bottom of the cross beam (71) is connected with the top side of each of the end plates (1) through the rib plate (74) in a reinforced mode, the two ends of the arch supporting beam (75) are connected with the cross beam (71) through the end sliding connection assembly, the pull rod (76) corresponding to each rectangular supporting frame (21) is arranged in the middle of the lower side of the arch supporting beam (75), and the bottom end of each pull rod (76) is connected with the corresponding rectangular supporting frame (21) through the middle sliding connection assembly.
9. The foundation pit prestress steel supporting system according to claim 8, wherein the end sliding connection assembly comprises a dovetail groove (72) and a dovetail slider (73), the transverse dovetail groove (72) is formed in the cross beam (71), the dovetail slider (73) is respectively arranged at two ends of the arched supporting beam (75), and the dovetail slider (73) is in transverse sliding connection with the dovetail groove (72).
10. The foundation pit prestress steel supporting system according to claim 8 or 9, wherein the middle sliding connection assembly comprises stressed longitudinal rods (77), transverse sliding grooves (78), pull blocks (79) and sliding blocks (710), the bottom of each pull rod (76) is provided with a longitudinal stressed longitudinal rod (77), the front end and the rear end of the bottom of each stressed longitudinal rod (77) are connected with the sliding blocks (710) through the pull blocks (79), the front side and the rear side of the rectangular supporting frame (21) are provided with the transverse sliding grooves (78), and the transverse sliding grooves (78) are in sliding connection with the corresponding sliding blocks (710).
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| CN202110829890.7A CN113431052B (en) | 2021-07-22 | 2021-07-22 | Foundation pit prestress steel supporting system |
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| CN202110829890.7A CN113431052B (en) | 2021-07-22 | 2021-07-22 | Foundation pit prestress steel supporting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114150672A (en) * | 2021-11-09 | 2022-03-08 | 王科彩 | Suspended bidirectional building foundation pit supporting device and supporting method |
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| CN113431052B (en) | 2023-01-03 |
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