A steel support girder platform for foundation pit earthwork operations in a confined space and its construction method

Abstract

The present invention relates to the technical field of building construction, and discloses a steel support girder platform and a construction method for earthwork operations in a confined space foundation pit. The steel support girder platform for earthwork operations in a confined space foundation pit includes lattice columns, and hanging bars are arranged on both sides of the lattice columns, and a box body is installed on one side of the hanging bars; a top plate system is arranged on the top of the box body, and the top plate system includes a top plate; a rocker system is arranged inside the box body; the rocker system includes a lower transmission device arranged at the bottom inside the box body, and also includes an upper transmission device arranged at the bottom of the top plate. When in use, hold the rocker and rotate the transmission rod. As the rocker drives the rotation of the transmission rod, the second telescopic rod and the first telescopic rod can be driven to fold and unfold with each other, so as to adjust the heights of the top plate and the girder, which is convenient to use and improves the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a steel support girder platform and a construction method for earthwork operations in a foundation pit in a confined space. Background Art

[0002] In the existing design of steel support girders for foundation pit excavation, generally four stiffening rib plates are welded on a lattice column, and then a flat plate is welded on the stiffening rib plates, and the girder is placed on the flat plate to form a support system for the girder, so as to facilitate the installation of the girder.

[0003] At present, welding on the lattice column belongs to high-altitude operation, the working surface is narrow, and during earthwork operations in a foundation pit in a confined space, there are problems such as difficult welding operations, and the flat plate after welding cannot ensure that the girder does not displace and rotate during construction. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to provide a steel support girder platform and a construction method for earthwork operations in a foundation pit in a confined space.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A steel support crossbeam platform for earthwork operations in a confined space foundation pit, comprising lattice columns. Hanging bars are arranged on both sides of the lattice columns, and a box body is installed on one side of the hanging bars. A top plate system is arranged on the top of the box body, and the top plate system includes a top plate for installing the crossbeam. A rocker system is arranged inside the box body for driving and adjusting the height of the top plate. The rocker system includes a lower transmission device arranged at the bottom inside the box body, and also includes an upper transmission device arranged at the bottom of the top plate. The lower transmission device and the upper transmission device are connected by a telescopic bracket. The telescopic bracket includes a first telescopic rod and a second telescopic rod, and the ends of the first telescopic rod and the second telescopic rod close to each other are movably connected. The lower transmission device includes fixing blocks installed on the inner wall of the bottom of the box body. The same stud is movably installed on the opposite sides of two adjacent fixing blocks. One end of the stud is installed with a transmission rod, and a rocker is arranged at the end of the transmission rod extending outside the box body. A lower fixing plate is installed on the inner wall of the bottom of the box body. A lower transmission plate is slidably installed on the side of the lower fixing plate close to the stud. A lower transmission thread is arranged on the side of the lower transmission plate close to the stud, and the side of the lower transmission thread meshes with the circumference of the stud. Lower transmission teeth are arranged at both ends of the lower transmission plate. A lower transmission gear is installed at the end of the second telescopic rod close to the lower transmission plate, and the circumference of the lower transmission gear meshes with the lower transmission teeth. The upper transmission device includes an upper fixing plate installed at the bottom of the top plate. An upper transmission plate is slidably arranged on the side of the upper fixing plate. Upper transmission teeth are arranged at both ends of the upper transmission plate. An upper transmission gear is installed at the end of the first telescopic rod close to the upper transmission plate, and the circumference of the upper transmission gear meshes with the upper transmission teeth. One side of the lower transmission gear is movably connected to the side of the lower fixing plate; the side of the upper transmission gear is movably connected to the side of the upper fixing plate.

[0007] Preferably, fixing clips are installed on the top plate. The fixing clips are connected to the top plate through fixing screws and fixing nuts for limiting the installation of the crossbeam.

[0008] Preferably, a lower fixing plate groove is opened on the side of the lower fixing plate; a lower transmission plate slider is arranged on the side of the lower transmission plate away from the lower transmission thread, and the lower transmission plate slider is slidably connected to the inside of the lower fixing plate groove.

[0009] Preferably, an upper fixing plate groove is opened on the side of the upper fixing plate; an upper transmission slider is arranged on the side of the upper transmission plate, and the upper transmission slider is slidably connected to the inside of the upper fixing plate groove.

[0010] Preferably, a rocker gear is installed at the end of the transmission rod extending outside the box body, and the rocker gear is located between the box body and the rocker.

[0011] Preferably, a positioning mechanism is provided at one end of the transmission rod extending to the outside of the box body, which is used to position the transmission rod and the top plate after the height adjustment of the top plate is completed; the positioning mechanism is located between the rocker gear and the rocker.

[0012] Preferably, the positioning mechanism comprises a plate body sleeved on the transmission rod, and a side of the plate body close to the rocker gear is provided with annularly distributed blocking blocks.

[0013] Preferably, a hook hole is installed on the bottom outer wall of the box body; a clamping strip is installed on one side of the plate body close to the box body, and the clamping strip and the hook hole are matched.

[0014] Preferably, a crossbeam mechanism is provided on the top of the lattice column, and the crossbeam mechanism includes a crossbeam bar, and both ends of the crossbeam bar are connected to the hanging bar through crossbeam bolts.

[0015] The above-mentioned construction method of the steel support tie beam platform for earthwork in a confined space foundation pit comprises the following steps: erecting the lattice columns, fixing the box body to the side of the lattice columns by means of hanging bars;

[0016] Place the tie beam on the top plate and rotate the rocker to raise the top plate to the required height;

[0017] After the height adjustment of the top plate is completed, the plate body is moved to position the rocker gear through the blocking block, and the card strip is inserted into the card hook hole to position the transmission rod;

[0018] Use two fixing clamps to limit the displacement of the tie beam, tighten the fixing screw and fixing nut to clamp the fixing clamps on the side of the top plate;

[0019] The crossbeam is fixed between a group of boxes by crossbeam bolts.

[0020] The beneficial effects of the present invention are:

[0021] When in use, after the lattice column is built, the box is fixed to the side of the lattice column by the hanging strip, the tie beam is installed on the top of the top plate, the rocker is held and the transmission rod is rotated, the transmission rod drives the stud to rotate, and the side thread of the stud is meshed with the lower transmission thread, thereby driving the lower transmission plate to move horizontally relative to the stud. With the horizontal movement of the lower transmission plate, the meshing of the lower transmission tooth and the lower transmission gear drives the lower transmission gear to rotate, thereby driving the second telescopic rod to swing with the lower transmission gear as the center of the circle, the swinging second telescopic rod and the first telescopic rod rotate with each other, and push the first telescopic rod to swing accordingly, at this time the upper transmission gear is meshed with the upper transmission tooth, that is, with the rotation of the transmission rod driven by the rocker, the second telescopic rod and the first telescopic rod can be driven to fold and unfold with each other, thereby adjusting the height of the top plate and the tie beam, which is convenient to use and improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the overall structure of a steel support girder platform for earthwork operations in a confined space foundation pit according to an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the box body and hanging strip structure of a steel support girder platform for earthwork operations in a confined space foundation pit according to an embodiment of the present invention;

[0024] Figure 3 Schematic diagram of the internal structure of the box body of a steel support girder platform for earthwork operations in a confined space foundation pit according to an embodiment of the present invention;

[0025] Figure 4 Schematic diagram of the lower transmission device structure of a steel support girder platform for earthwork operations in a confined space foundation pit according to an embodiment of the present invention;

[0026] Figure 5 is Figure 4 Enlarged view of the partial structure at A in

[0027] Figure 6 Schematic diagram of the stud and transmission rod structure of a steel support girder platform for earthwork operations in a confined space foundation pit according to an embodiment of the present invention;

[0028] Figure 7 Schematic diagram of the lower transmission plate and lower transmission thread structure of a steel support girder platform for earthwork operations in a confined space foundation pit according to an embodiment of the present invention;

[0029] Figure 8 Schematic diagram of the lower transmission plate and lower transmission plate slider structure of a steel support girder platform for earthwork operations in a confined space foundation pit according to an embodiment of the present invention;

[0030] Figure 9 Schematic diagram of the lower fixing plate structure of a steel support girder platform for earthwork operations in a confined space foundation pit according to an embodiment of the present invention;

[0031] Figure 10 Schematic diagram of the upper transmission device structure of a steel support girder platform for earthwork operations in a confined space foundation pit according to an embodiment of the present invention;

[0032] Figure 11 Schematic diagram of the upper transmission plate and upper transmission slider structure of a steel support girder platform for earthwork operations in a confined space foundation pit according to an embodiment of the present invention;

[0033] Figure 12 Schematic diagram of the upper fixing plate and upper fixing plate groove structure of a steel support girder platform for earthwork operations in a confined space foundation pit according to an embodiment of the present invention;

[0034] Figure 13Schematic diagram of the box body and roof structure of a steel support girder platform for earthwork operations in a confined space foundation pit proposed in an embodiment of the present invention;

[0035] Figure 14 Schematic diagram of the roof system structure of a steel support girder platform for earthwork operations in a confined space foundation pit proposed in an embodiment of the present invention;

[0036] Figure 15 Schematic diagram of the positioning mechanism structure of a steel support girder platform for earthwork operations in a confined space foundation pit proposed in an embodiment of the present invention;

[0037] Figure 16 Schematic diagram of the crossbeam mechanism structure of a steel support girder platform for earthwork operations in a confined space foundation pit proposed in an embodiment of the present invention.

[0038] In the figure: lattice column - 1, rocker system - 2, lower transmission device - 21, stud - 211, fixed block - 212, transmission rod - 213, lower transmission plate - 214, lower transmission thread - 2141, lower transmission tooth - 2142, lower transmission plate slider - 2143, lower transmission gear - 215, lower fixed plate - 216, lower fixed plate groove - 2161, rocker gear - 217, rocker - 218, telescopic support - 22, first telescopic rod - 221, second telescopic rod - 222, upper transmission device - 23, upper fixed plate - 231, upper fixed plate groove - 2311, upper transmission plate - 232, upper transmission slider - 2321, upper transmission tooth - 2322, upper transmission gear - 233, box body - 3, hook hole - 31, hanging strip - 32, roof system - 4, roof - 41, fixed clamp - 42, fixed screw - 43, fixed nut - 44, positioning mechanism - 5, plate body - 51, blocking block - 52, clamping strip - 53, girder - 6, crossbeam mechanism - 7, crossbeam bolt - 71, crossbeam strip - 72. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0040] Refer to Figures 1 to 16, a steel support girder platform for earthwork operations in a confined space foundation pit, comprising a lattice column 1, with hanging bars 32 arranged on both sides of the lattice column 1, and a box body 3 installed on one side of the hanging bar 32; a top plate system 4 is arranged on the top of the box body 3, and the top plate system 4 includes a top plate 41 for installing a girder 6; a rocker system 2 is arranged inside the box body 3 for driving and adjusting the height of the top plate 41; the rocker system 2 includes a lower transmission device 21 arranged at the bottom inside the box body 3, and also includes an upper transmission device 23 arranged at the bottom of the top plate 41, and the lower transmission device 21 and the upper transmission device 23 are connected by a telescopic bracket 22; the telescopic bracket 22 includes a first telescopic rod 221 and a second telescopic rod 222, and the ends of the first telescopic rod 221 and the second telescopic rod 222 close to each other are movably connected; the lower transmission device 21 includes fixed blocks 212 installed on the inner bottom wall of the box body 3, and a same stud 211 is movably installed on the opposite sides of two adjacent fixed blocks 212, one end of the stud 211 is installed with a transmission rod 213, and a rocker 218 is arranged at the end of the transmission rod 213 extending outside the box body 3; the inner bottom wall of the box body 3 is installed with a lower fixing plate 216, a lower transmission plate 214 is slidably installed on the side of the lower fixing plate 216 close to the stud 211, a lower transmission thread 2141 is arranged on the side of the lower transmission plate 214 close to the stud 211, and the side of the lower transmission thread 2141 is meshed with the circumference of the stud 211; lower transmission teeth 2142 are arranged at both ends of the lower transmission plate 214; a lower transmission gear 215 is installed at the end of the second telescopic rod 222 close to the lower transmission plate 214, and the circumference of the lower transmission gear 215 is meshed with the lower transmission teeth 2142; the upper transmission device 23 includes an upper fixing plate 231 installed at the bottom of the top plate 41, an upper transmission plate 232 is slidably arranged on the side of the upper fixing plate 231, and upper transmission teeth 2322 are arranged at both ends of the upper transmission plate 232; an upper transmission gear 233 is installed at the end of the first telescopic rod 221 close to the upper transmission plate 232, and the circumference of the upper transmission gear 233 is meshed with the upper transmission teeth 2322; one side of the lower transmission gear 215 is movably connected to the side of the lower fixing plate 216; the side of the upper transmission gear 233 is movably connected to the side of the upper fixing plate 231.

[0041] When in use, after the lattice column 1 is set up, the box body 3 is fixed to the side of the lattice column 1 through the hanging strip 32, the tie beam 6 is installed on the top of the top plate 41, hold the rocker 218 and rotate the transmission rod 213, the transmission rod 213 drives the stud 211 to rotate, the thread on the side of the stud 211 meshes with the lower transmission thread 2141, so as to drive the lower transmission plate 214 to move horizontally relative to the stud 211. As the lower transmission plate 214 moves horizontally, due to the meshing of the lower transmission teeth 2142 and the lower transmission gear 215, the lower transmission gear 215 is driven to rotate, so as to drive the second telescopic rod 222 to swing with the lower transmission gear 215 as the center. The swinging second telescopic rod 222 and the first telescopic rod 221 rotate relative to each other, and push the first telescopic rod 221 to swing accordingly. At this time, the upper transmission gear 233 meshes with the upper transmission teeth 2322, that is, as the rocker 218 drives the rotation of the transmission rod 213, the second telescopic rod 222 and the first telescopic rod 221 can be driven to fold and unfold relative to each other, so as to adjust the heights of the top plate 41 and the tie beam 6, which is convenient to use and improves the construction efficiency.

[0042] As a preferred embodiment of the present invention, a fixing clip 42 is installed on the top plate 41, and the fixing clip 42 is connected to the top plate 41 through a fixing screw 43 and a fixing nut 44, and is used to limit the installation of the tie beam 6.

[0043] As a preferred embodiment of the present invention, a lower fixing plate groove 2161 is provided on the side of the lower fixing plate 216; a lower transmission plate slider 2143 is provided on the side of the lower transmission plate 214 away from the lower transmission thread 2141, and the lower transmission plate slider 2143 is slidably connected to the inside of the lower fixing plate groove 2161. When the lower transmission plate 214 moves relative to the lower fixing plate 216, the lower fixing plate groove 2161 and the lower transmission plate slider 2143 guide the movement of the lower transmission plate 214.

[0044] As a preferred embodiment of the present invention, an upper fixing plate groove 2311 is provided on the side of the upper fixing plate 231; an upper transmission slider 2321 is provided on the side of the upper transmission plate 232, and the upper transmission slider 2321 is slidably connected to the inside of the upper fixing plate groove 2311. When the upper transmission plate 232 moves relative to the upper fixing plate 231, the upper transmission slider 2321 and the upper fixing plate groove 2311 guide the movement of the upper transmission plate 232.

[0045] As a preferred embodiment of the present invention, a rocker gear 217 is installed at one end of the transmission rod 213 extending to the outside of the box body 3, and the rocker gear 217 is located between the box body 3 and the rocker 218.

[0046] As a preferred embodiment of the present invention, a positioning mechanism 5 is provided at one end of the transmission rod 213 extending outside the box body 3, which is used to position the transmission rod 213 and the top plate 41 after the height adjustment of the top plate 41 is completed; the positioning mechanism 5 is located between the rocker gear 217 and the rocker 218.

[0047] As a preferred embodiment of the present invention, the positioning mechanism 5 includes a plate body 51 sleeved on the transmission rod 213. An annularly distributed blocking block 52 is provided on one side of the plate body 51 close to the rocker gear 217. After the height adjustment of the top plate 41 is completed, the plate body 51 is pushed towards the box body 3, so that the blocking block 52 is stuck with the teeth on the rocker gear 217, thereby positioning the rotation of the rocker gear 217 and the transmission rod 213, effectively avoiding the rotation of the transmission rod 213 during the earthwork operation and causing changes in the heights of the top plate 41 and the tie beam 6.

[0048] As a preferred embodiment of the present invention, a hook hole 31 is installed on the outer wall of the bottom of the box body 3; a clamping strip 53 is installed on one side of the plate body 51 close to the box body 3, and the clamping strip 53 is adapted to the hook hole 31. When the plate body 51 is pushed so that the blocking block 52 blocks and positions the rocker gear 217, the clamping strip 53 is inserted into the hook hole 31 to position the plate body 51, avoiding the rotation of the plate body 51 along with the transmission rod 213 and the rocker gear 217, ensuring the effective positioning of the transmission rod 213 and the top plate 41, and improving the safety of the earthwork operation.

[0049] As a preferred embodiment of the present invention, a cross beam mechanism 7 is provided at the top of the lattice column 1. The cross beam mechanism 7 includes cross beam strips 72, and both ends of the cross beam strips 72 are connected to the hanging strips 32 through cross beam bolts 71, which are used to fixedly strengthen the installation of the box body 3.

[0050] The construction method of the above steel support tie beam platform for earthwork operation in a confined space foundation pit includes the following steps: erect the lattice column 1, and fix the box body 3 on the side of the lattice column 1 through the hanging strip 32; place the tie beam 6 on the top plate 41, and rotate the rocker 218 to raise the top plate 41 to the required height; after the height adjustment of the top plate 41 is completed, move the plate body 51, position the rocker gear 217 through the blocking block 52, and at the same time insert the clamping strip 53 into the hook hole 31 to position the transmission rod 213; use two fixing clamps 42 to limit the displacement of the tie beam 6, and tighten the fixing screw 43 and the fixing nut 44 to clamp the fixing clamp 42 on the side of the top plate 41; fix the cross beam strip 72 between a group of box bodies 3 through the cross beam bolt 71.

[0051] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A steel support girder platform for foundation pit earthwork operation in a confined space, comprising lattice columns, characterized in that, Hanging bars are arranged on both sides of the lattice column, and a box body is installed on one side of the hanging bar; A top plate system is arranged on the top of the box body, and the top plate system includes a top plate for installing a tie beam; A rocker system is arranged inside the box body for driving and adjusting the height of the top plate; the rocker system includes a lower transmission device arranged at the bottom inside the box body, and also includes an upper transmission device arranged at the bottom of the top plate. The lower transmission device and the upper transmission device are connected by a telescopic bracket; The telescopic bracket includes a first telescopic rod and a second telescopic rod, and one ends of the first telescopic rod and the second telescopic rod close to each other are movably connected; The lower transmission device includes fixing blocks installed on the inner wall of the bottom of the box body. A same stud is movably installed on the opposite sides of two adjacent fixing blocks. One end of the stud is installed with a transmission rod, and a rocker is arranged at the end of the transmission rod extending outside the box body; The inner wall of the bottom of the box body is installed with a lower fixing plate. A lower transmission plate is slidably installed on one side of the lower fixing plate close to the stud. A lower transmission thread is arranged on one side of the lower transmission plate close to the stud, and the side of the lower transmission thread is meshed with the circumference of the stud; Lower transmission teeth are arranged at both ends of the lower transmission plate; A lower transmission gear is installed at one end of the second telescopic rod close to the lower transmission plate, and the circumference of the lower transmission gear is meshed with the lower transmission teeth; The upper transmission device includes an upper fixing plate installed at the bottom of the top plate. An upper transmission plate is slidably arranged on the side of the upper fixing plate. Upper transmission teeth are arranged at both ends of the upper transmission plate; An upper transmission gear is installed at one end of the first telescopic rod close to the upper transmission plate, and the circumference of the upper transmission gear is meshed with the upper transmission teeth; One side of the lower transmission gear is movably connected with the side of the lower fixing plate; the side of the upper transmission gear is movably connected with the side of the upper fixing plate. A fixing clip is installed on the top plate, and the fixing clip is connected with the top plate through a fixing screw and a fixing nut for limiting the installation of the tie beam.

2. The steel support girder platform for foundation pit earthwork operation in a confined space according to claim 1, wherein A lower fixing plate groove is opened on the side of the lower fixing plate; a lower transmission plate slider is arranged on one side of the lower transmission plate away from the lower transmission thread, and the lower transmission plate slider is slidably connected with the inside of the lower fixing plate groove.

3. The steel support girder platform for foundation pit earthwork operation in a confined space according to claim 1, wherein, An upper fixing plate groove is opened on the side of the upper fixing plate; an upper transmission slider is arranged on the side of the upper transmission plate, and the upper transmission slider is slidably connected with the inside of the upper fixing plate groove.

4. A steel support girder platform for earthwork operation in a confined space foundation pit according to claim 1, wherein, A rocker gear is installed at the end of the transmission rod extending outside the box body, and the rocker gear is located between the box body and the rocker; 5. A steel support girder platform for earthwork operations in a confined space foundation pit according to claim 4, characterized in that, A positioning mechanism is arranged at the end of the transmission rod extending outside the box body for positioning the transmission rod and the top plate after the height of the top plate is adjusted; The positioning mechanism is located between the rocker gear and the rocker; 6. The steel support girder platform for foundation pit earthwork operation in a confined space according to claim 5, wherein The positioning mechanism includes a plate body sleeved on the transmission rod, and a ring-shaped distributed blocking block is arranged on one side of the plate body close to the rocker gear; 7. The steel support crossbeam platform for foundation pit earthwork operation in a confined space according to claim 6, wherein A hook hole is installed on the outer wall of the bottom of the box body; A card strip is installed on one side of the plate body close to the box body, and the card strip is matched with the hook hole; 8. The steel support girder platform for foundation pit earthwork operation in a confined space according to claim 7, characterized in that, A cross beam mechanism is arranged at the top of the lattice column, and the cross beam mechanism includes cross beam strips. Both ends of the cross beam strips are connected with the hanging bars through cross beam bolts; 9. The construction method of a steel support crossbeam platform for foundation pit earthwork operation in a confined space as described in claim 8, characterized in that, Including the following steps: Build the lattice columns and fix the box to the side of the lattice columns through hanging strips; Place the tie beam on the top plate and rotate the rocker to raise the top plate to the required height; After the height adjustment of the top plate is completed, the plate body is moved to position the rocker gear through the blocking block, and the card strip is inserted into the card hook hole to position the transmission rod; Use two fixing clamps to limit the displacement of the tie beam, tighten the fixing screw and fixing nut to clamp the fixing clamps on the side of the top plate; The crossbeam is fixed between a group of boxes by crossbeam bolts.

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