A foundation pit construction equipment and method

Abstract

This invention discloses a foundation pit construction equipment and method, relating to the field of civil engineering. It includes a reference platform equipped with multiple tangential frames. Drill bits are detachably mounted on the tangential frames for drilling. After removing the drill bits, tangential wheel sets are installed, followed by flat-cutting wheel sets. A cutting rope is installed between two tangential wheel sets. The tangential wheel sets drive the cutting rope downwards for cutting, while the cutting rope between two flat-cutting wheel sets performs a horizontal cut within the foundation pit. The reference platform is equipped with a rope take-up chamber, on which the cutting rope is wound. The foundation pit construction is completed through steps such as installation, adjustment, drilling, tangential cutting, horizontal cutting, and core sampling. Drilling at multiple points and then feeding the cutting rope downwards creates a gap. The horizontal cutting wheel sets then perform a horizontal cut, completely detaching the rock core from the ground for easy extraction. This construction scheme significantly improves the efficiency of foundation pit construction and can be adjusted according to different foundation pit sizes.

Description

Technical Field

[0001] This invention relates to the field of civil engineering, and in particular to a foundation pit construction equipment and method. Background Technology

[0002] In construction projects such as building, transportation, and water conservancy, it is often necessary to excavate foundation pits in hard ground or rock formations, such as excavating rock foundation caps, building foundations in mountainous areas, or pipeline trenches. These geological conditions are drastically different from traditional soft soil foundation pits. The upper layer may be an extremely hard, solidified soil layer or strongly weathered rock, while the lower layer is often moderately weathered, intact bedrock with high strength and good integrity, making it impossible for ordinary excavation equipment to effectively penetrate. Current technology typically employs a rudimentary construction method of multiple machines operating in stages: first, a high-powered hydraulic hammer or breaker is used to break up the hard rock mass, splitting large rocks into smaller fragments; then, the excavator bucket is changed to excavate and transport the fragmented rock pieces. For tasks requiring high precision, such as controlling the bottom elevation of the foundation pit, smoothing the slope, or excavating special shapes, extensive manual labor using pneumatic picks, crowbars, and even static blasting agents is still required for extremely arduous secondary finishing.

[0003] This traditional segmented operation method involves frequent equipment switching, with each stage (crushing, excavation, and slag removal) requiring different specialized equipment. The time costs associated with equipment arrival, replacement, and coordination are high. Secondly, the overall efficiency is extremely low. The impact crushing by the hydraulic breaker is a slow process, and the subsequent complex multi-stage connections severely delay the excavation progress. This slows down the overall construction pace, making the excavation of foundation pits in hard rock strata a key bottleneck with a long project cycle, high costs, and concentrated safety risks. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention discloses a foundation pit construction device, comprising a reference platform with multiple tangential frames mounted on it. Drill bits are detachably mounted on each tangential frame for drilling. After removing the drill bits, a tangential wheel assembly is installed, followed by a flat-cutting wheel assembly. A cutting rope is installed between two tangential wheel assemblies. The tangential wheel assemblies drive the cutting rope downwards for cutting, while the cutting rope between the two flat-cutting wheel assemblies performs a flat cut within the foundation pit. A rope take-up chamber is mounted on the reference platform, and the cutting rope is wound around it. This technical solution allows for drilling at multiple points and then feeding the cutting rope downwards to create a gap. Furthermore, the flat-cutting wheel assembly ensures the rock core is completely detached from the ground for easy extraction. This construction method significantly improves the efficiency of foundation pit construction and can be adjusted according to different foundation pit sizes.

[0005] Furthermore, the tangent frame includes a track, which is fixedly installed on a reference platform. An adjustment plate is mounted on the track, and a support vertical rod is fixedly mounted on the adjustment plate. A drill is slidably mounted on the support vertical rod, and the drill moves up and down within the support vertical rod via a gear and rack. A connector is mounted at the output end of the drill, and the connector is connected to the drill bit.

[0006] Furthermore, the track and the adjusting plate are adjustable. A mating block is slidably mounted on the track, and a fixing plate is fixedly mounted on the mating block. A second connecting lug and a fixing seat are fixedly mounted on the fixing plate. A first connecting lug is hinged to the second connecting lug and is fixedly connected to the adjusting plate. An adjusting lug is fixedly mounted at the end of the adjusting plate. An arc-shaped groove is provided on the adjusting lug. The angle of the adjusting plate is adjusted by rotating the first connecting lug, and the angle is fixed by locking it in the arc-shaped groove with a nut. A locking block is fixedly mounted on the lower side of the fixing plate. A locking shaft is mounted on the locking block. The locking shaft presses against the track to fix the fixing plate and the track.

[0007] Furthermore, a vertical plate and a connecting plate are fixedly mounted on the adjusting plate. Two fixing rings are hinged to the vertical plate, and the ends of the fixing rings are fixed to the connecting plate by bolts. The two fixing rings are used to fix the drill bit. Through the above technical solution, the construction position can be adjusted according to the construction plan, eliminating the need to move the reference platform and keeping it stable, thus improving construction quality. Adjusting the position by moving the fixing plate or rotating the adjusting plate is simpler. Furthermore, when installing multiple drill bits, the fixing rings prevent the lower drill bit from falling off, ensuring construction safety. The fixed drill bit is also easier to connect to the upper drill bit, reducing installation difficulty.

[0008] Furthermore, the reference platform includes four sets of symmetrically arranged reference frames one and reference frames two, which are fixedly connected. The four reference frames one and reference frames two form a square, and long plates are fixedly installed at the four corners. The tangent frame is fixedly installed on the long plates.

[0009] Furthermore, the tangential wheel assembly includes a tangential flange, which is fixedly mounted on the connector. A tangential long rod is fixedly mounted on the lower side of the tangential flange. An upper tangential wheel is rotatably mounted on the upper part of the tangential long rod, and a lower tangential wheel is rotatably mounted on the lower part of the tangential long rod. The cutting rope on the rope take-up chamber passes around the upper and lower tangential wheels, and then passes around the lower and upper tangential wheels on another tangential wheel assembly before returning to the rope take-up chamber.

[0010] Furthermore, the flat-cutting wheel assembly includes a flat-cutting flange, which is fixedly mounted on the drilling rig. A flat-cutting long rod is fixedly mounted on the lower side of the flat-cutting flange. An upper-layer flat-cutting wheel is rotatably mounted on the upper part of the flat-cutting long rod, and a flat-cutting circular plate is fixedly mounted on the lower part of the flat-cutting long rod. A lower-layer circular plate is fixedly mounted on the lower side of the flat-cutting circular plate. A vertical wheel frame and a horizontal wheel frame are fixedly mounted on the lower-layer circular plate. The lower-layer flat-cutting wheel is rotatably mounted on the vertical wheel frame, and a horizontal wheel is rotatably mounted on the horizontal wheel frame. The lower-layer flat-cutting wheel and the horizontal wheel are perpendicular to each other. Through the above technical solution, the interior of the foundation pit is first divided into multiple vertical strips by tangential cutting, and then the rock core is cut off from the underground by flat cutting, which can greatly improve the construction efficiency. Moreover, the flat-cutting height can be selected by driving the lifting of the tangential cutting frame, cutting out rock cores of different sizes, reducing the difficulty of extracting the rock core.

[0011] Furthermore, the reference platform is equipped with a set of universal wheels, which is located between the rope take-up compartment and the cutting frame. The cutting rope comes out of the rope take-up compartment, passes through the universal wheels, and then reaches the cutting frame for cutting.

[0012] Furthermore, a gantry frame is installed on one side of the reference platform, spanning the reference platform. An electric hoist is installed on the gantry frame, and a lifting rope is installed on the electric hoist. A tensioning device is installed at the end of the lifting rope to lift the cut rock core.

[0013] The present invention also discloses a method for constructing a foundation pit, using the above-mentioned construction equipment, including the following steps: Step 1: Installation; Select a suitable construction location to install a reference platform, install expansion pipes on the ground, and then fix the reference platform on the ground.

[0014] Step 2: Adjustment; Install the tangent frame and drill bit. During installation, adjust the position of the fixing plate on the track, rotate the adjusting plate to adjust the angle, and when it is adjusted to the appropriate position, fix the adjusting ear to the fixing seat, lock the shaft to fix the locking block to the track, and fix the drill bit to the connector.

[0015] Step 3: Drilling; Drill multiple holes evenly along the edge according to the required shape of the foundation pit. If the drilling depth is insufficient, tighten the drill bit with a fixing ring, lift the drilling machine, install a new drill bit for connection, and then adjust the position of the tangent frame to drill round holes in the foundation pit construction area.

[0016] Step 4: Tangent Cut; Remove the drill bit and replace it with a tangent wheel assembly. Install a cable reel and a universal wheel assembly on the reference platform. The cutting rope on the cable reel changes direction through the universal wheel assembly and wraps around the tangent wheel assembly, connecting to the adjacent tangent wheel assembly. Finally, it returns to the cable reel. The cutting rope between the bottoms of the two adjacent lower tangent wheels cuts the ground. The drilling rig descends, driving the cutting rope down to cut. By cutting different positions, the entire edge of the pit is cut out. Then, the cutting rope is wound around the two diagonally opposite tangent wheel assemblies, dividing the entire rock core in the middle into two halves.

[0017] Step 5: Flat Cutting; Retrieve the cutting rope and remove the tangent wheel set. Install the flat cutting wheel set on the tangent frame. Wrap the cutting rope around the upper and lower flat cutting wheels, and finally exit from the transverse wheel. The adjacent tangent frame is also equipped with a flat cutting wheel set, which wraps around the adjacent transverse wheel. Then, it returns to the rope take-up chamber through the lower and upper flat cutting wheels. The cutting rope between the two transverse wheels is not taut and wraps around the entire rock core. When the cutting rope between the two transverse wheels tightens, flat cut the lower side of the rock core.

[0018] Step Six: Core Extraction; Install the gantry crane, move the gantry crane to the corresponding position, insert the hoist's hoisting rope into the round hole, tighten the tensioning device, and then lift it to extract the rock core.

[0019] The advantages of this invention compared to the prior art are:

[0020] (1) Through the technical solution of the present invention, multiple holes are drilled and then the cutting rope is fed downward to cut the gap. The rock core is completely separated from the ground by the flat cutting wheel group, which makes it easy to take out. This construction solution greatly improves the construction efficiency of the foundation pit and can be adjusted according to different foundation pit sizes.

[0021] (2) Through the technical solution of the present invention, the construction position can be adjusted according to the construction plan, so that the reference platform can be moved and the reference platform can be kept stable, which can improve the construction quality. It is simpler to adjust the position by moving the fixed plate or rotating the adjustment plate. When installing multiple drill bits, they are fixed by the fixing ring to prevent the lower drill bit from falling off, which can ensure construction safety. The fixed drill bit is also easier to connect with the upper drill bit, reducing the installation difficulty.

[0022] (3) By using the technical solution of the present invention, the pit is first divided into multiple vertical strips by tangent cutting, and then the rock core is cut off from the underground by flat cutting, which can greatly improve the construction efficiency. Furthermore, the tangent frame can be driven to lift and select the flat cutting height to cut out rock cores of different sizes, reducing the difficulty of taking out the rock core. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the tangent frame and reference platform of the present invention.

[0025] Figure 3 This is a schematic diagram of the tangent frame of the present invention.

[0026] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0027] Figure 5 This is a schematic diagram of the tangent wheel assembly of the present invention.

[0028] Figure 6 This is a schematic diagram of the tangential pulley assembly after the rope has been wound according to the present invention.

[0029] Figure 7 This is a schematic diagram of the ground cutting line of the present invention.

[0030] Figure 8 This is a schematic diagram of the flat-cut wheel assembly of the present invention.

[0031] Figure 9 This is a partial schematic diagram of the flat-cut wheel assembly of the present invention.

[0032] Figure 10 This is a schematic diagram of the flat-cutting wheel assembly of the present invention performing flat cutting.

[0033] Figure 11 This is a schematic diagram of the universal wheel assembly of the present invention.

[0034] Figure 12 This is a schematic diagram of the fixing ring structure of the present invention.

[0035] Reference numerals: 1-Tangulating frame; 2-Base platform; 3-Universal wheel assembly; 4-Gantry frame; 5-Tangulating wheel assembly; 6-Flat cutting wheel assembly; 7-Cutting rope; 8-Cutting line; 9-Rope take-up compartment; 101-Railway; 102-Matching block; 103-Fixing plate; 104-Adjusting plate; 105-Adjusting ear; 106-Fixing seat; 107-Connecting ear one; 108-Connecting ear two; 109-Locking block; 110-Locking shaft; 111-Supporting vertical rod; 112-Diagonal brace; 113-Drilling rig; 114-Connector; 115-Fixing ring; 116-Vertical plate; 117-Connecting plate; 118-Drill bit; 119-Arc groove; 201-Base frame one; 202-Long plate; 203-Base frame two; 204-Connecting piece; 301-Connecting base plate; 302-Vertical support column; 303-Horizontal support column; 304-Intermediate ring; 305-Lower ring; 306-Horizontal roller bracket; 307-Horizontal roller; 308-Upper ring; 309-Vertical bracket; 310-Vertical roller; 401-Gantry vertical rod; 402-Traveling wheel; 403-Crossbeam; 404-Electric hoist; 501-Tangential flange; 502-Anti-detachment baffle one; 503-Upper tangential roller; 504-Tangential... Long rod; 505-Lower layer tangential wheel; 506-Anti-detachment baffle two; 601-Flat-cut flange; 602-Anti-detachment baffle three; 603-Upper layer flat-cut wheel; 604-Flat-cut long rod; 605-Lower layer flat-cut wheel; 606-Horizontal wheel; 607-Lower layer circular plate; 608-Vertical wheel frame; 609-Flat-cut support rod; 610-Flat-cut circular plate; 611-Anti-detachment baffle four; 612-Horizontal wheel frame. Detailed Implementation

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] like Figure 1 , Figure 2 , Figure 6 and Figure 10 A foundation pit construction device includes a reference platform 2, on which multiple tangent frames 1 are mounted. Drill bits 118 are detachably mounted on the tangent frames 1 for drilling. After removing the drill bits 118, tangent wheel sets 5 are installed. After removing the tangent wheel sets 5, flat cutting wheel sets 6 are installed. A cutting rope 7 is installed between two tangent wheel sets 5. The tangent wheel sets 5 drive the cutting rope 7 to cut downwards. The cutting rope 7 is installed between two flat cutting wheel sets 6 to cut horizontally inside the foundation pit. A rope take-up chamber 9 is mounted on the reference platform 2, and the cutting rope 7 is wound around the rope take-up chamber 9. In this embodiment, when cutting a square foundation pit, four corners are set, and holes are drilled at the four corners. Then, the tangential wheel set 5 cuts downwards to cut out the square edge. If the foundation pit is large, the diagonal can be cut. After cutting, only the bottom of the rock core remains connected to the ground. Then, the flat cutting wheel set 6 is used to cut horizontally to sever the connection between the rock core and the ground, making it easy to remove. Through the above technical solution, drilling at multiple points and feeding the cutting rope 7 downwards can cut a gap. The horizontal cutting wheel set 6 is used to cut horizontally to completely separate the rock core from the ground, making it easy to remove. This construction method greatly improves the construction efficiency of the foundation pit and can be adjusted according to different foundation pit sizes.

[0038] In this embodiment, as Figure 2 The reference platform 2 includes four sets of symmetrically arranged reference frames 1 201 and reference frames 203. Each set of reference frames 1 201 and reference frames 203 is fixedly connected. The four sets of reference frames 1 201 and reference frames 203 form a square inside, with the middle left open for construction. Long plates 202 are fixedly installed at the four corners. Tangent frames 1 are fixedly installed on the long plates 202. Expansion holes are drilled in the ground. Connecting pieces 204 are fixedly installed at multiple positions on reference frames 1 201 and reference frames 203. The connecting pieces 204 are fixed in the expansion holes by bolts, thus fixing the entire reference platform 2 to the ground.

[0039] In this embodiment, the tangential frame 1 is installed according to construction requirements. Two tangential frames 1 are installed for each construction project. First, they are installed at two adjacent corners on the reference platform 2. Specifically, as follows: Figure 3 , Figure 4The tangent frame 1 includes a track 101, which is fixedly installed on a long plate 202. An adjusting plate 104 is mounted on the track 101, and the relative position between the track 101 and the adjusting plate 104 is adjustable. A support vertical rod 111 is fixedly mounted on the adjusting plate 104, and a drill 113 is slidably mounted on the support vertical rod 111. The drill 113 moves up and down within the support vertical rod 111 via a gear and rack. A connector 114 is mounted at the output end of the drill 113, and the connector 114 is connected to a drill bit 118. A diagonal brace 112 is fixedly mounted on the support vertical rod 111, and the bottom of the diagonal brace 112 is fixedly connected to the adjusting plate 104 for reinforcement to prevent the support vertical rod 111 from tilting or deforming.

[0040] In this embodiment, the track 101 and the adjusting plate 104 are adjustable. A mating block 102 is slidably mounted on the track 101, and a fixing plate 103 is fixedly mounted on the mating block 102, so that the sliding direction of the fixing plate 103 is along the diagonal direction of the reference platform 2. A connecting ear 2 108 and a fixing seat 106 are fixedly mounted on the fixing plate 103. A connecting ear 1 107 is hinged on the connecting ear 2 108 and is fixedly connected to the adjusting plate 104. An adjusting ear 105 is fixedly mounted at the end of the adjusting plate 104. An arc groove 119 is provided on the adjusting ear 105. The adjusting plate 104 can be fixed in angle position by rotating the connecting ear 107 and locking it in the arc groove 119 with a nut. A locking block 109 is fixedly mounted on the lower side of the fixing plate 103. A locking shaft 110 is mounted on the locking block 109. The locking shaft 110 presses against the track 101 to fix the fixing plate 103 and the track 101.

[0041] In this embodiment, a vertical plate 116 and a connecting plate 117 are fixedly mounted on the adjusting plate 104. Two fixing rings 115 are hinged to the vertical plate 116, and the ends of the fixing rings 115 are fixed to the connecting plate 117 by bolts. The two fixing rings 115 are used to fix the drill bit 118 (e.g., Figure 12The drill rig 113 can drive the connector 114 to rotate, which in turn drives the drill bit 118 to rotate. The drill rig 113 moves up and down within the support rod 111 via a gear and rack, thus driving the drill bit 118 to move up and down. The drill bit 118 rotates downwards to drill a hole. When the hole is not long enough, the machine is stopped, and the two retaining rings 115 lock the lower drill bit 118. Then, the connection between the connector 114 and the drill bit 118 is disconnected, and the drill rig 113 is raised to a higher position. Another drill bit 118 is installed in the middle, and both drill bits 118 are also fixed (the specific connection method is a common method in drilling and will not be elaborated further). Afterwards... Continue drilling downwards to the specified depth, change the installation position of the tangent frame 1, and drill holes at all four corners of the planned foundation pit. Through the above technical solution, the construction position can be adjusted according to the construction plan, so that the reference platform 2 does not need to be moved, keeping the reference platform 2 stable and improving the construction quality. Moving the fixed plate 103 or rotating the adjustment plate 104 to adjust the position is simpler. When installing multiple drill bits 118, they are fixed by the fixing ring 115 to prevent the lower drill bit 118 from falling, which can ensure construction safety. The fixed drill bit 118 is also easier to connect with the upper drill bit 118, reducing the installation difficulty.

[0042] In this embodiment, after drilling is completed, a tangent is performed. A tangent refers to cutting from top to bottom to cut the rock core into vertical strips within the foundation pit. Specifically, as shown below... Figure 5 , Figure 6As shown, the drill bit 118 is removed and detached from the tangent frame 1. The tangent wheel assembly 5 is then installed on the connector 114. The tangent wheel assembly 5 includes a tangent flange 501, which is fixedly installed on the connector 114. A tangent long rod 504 is fixedly mounted on the lower side of the tangent flange 501. An upper tangent wheel 503 is rotatably mounted on the upper part of the tangent long rod 504, and a lower tangent wheel 505 is rotatably mounted on the lower part of the tangent long rod 504. Anti-detachment baffle 1 502 and anti-detachment baffle 2 506 are fixedly mounted on the tangent long rod 504. Anti-detachment baffle 1 502 is located above the upper tangent wheel 503, and anti-detachment baffle 2 506 is located below the lower tangent wheel 505. Anti-detachment baffle 1 502 and anti-detachment baffle 2 506 prevent the cutting rope 7 from falling off. The cutting rope 7 on the rope take-up chamber 9 passes around the upper tangent wheel 503 and the lower tangent wheel 505 of one of the tangent wheel sets 5, and then passes around the lower tangent wheel 505 and the upper tangent wheel 503 on the other tangent wheel set 5 to return to the rope take-up chamber 9. In this process, the tangent frame 1 is first installed at the adjacent corner of the reference platform 2. At this point, the cutting rope 7 is located on one side of the pit. The drill rig 113 descends to cut a side. If the length is insufficient, a tangent wheel assembly 5 can be added in the middle, similar to the drill bit 118. The tangent rod 504 has a through hole; an iron rod is passed through the through hole and secured to two fixing rings 115. Then, the connection between the connector 114 and the tangent flange 501 is disconnected. The iron rod prevents the entire tangent wheel assembly 5 from falling. The drill rig 113 then rises to add another tangent wheel assembly 5 for extension. Removing the iron rod allows it to descend and continue cutting. By changing the position of the tangent frame 1, the entire outer edge of the pit is cut. Finally, the tangent frame 1 is placed diagonally to cut a diagonal line. The shape of the cut pit is as follows: Figure 7 As shown, the cut is named cutting line 8. In other embodiments, cutting line 8 can cut two diagonal lines and can also be divided into multiple small areas.

[0043] In this embodiment, after the orthogonal cutting is completed, a horizontal cutting is performed. A horizontal cutting refers to severing the bottom edge of the vertical rock core. Specifically, as shown... Figure 8 , Figure 9As shown, the flat cutting wheel assembly 6 includes a flat cutting flange 601, which is fixedly mounted on the drilling rig 113. A flat cutting long rod 604 is fixedly mounted on the lower side of the flat cutting flange 601. An upper flat cutting wheel 603 is rotatably mounted on the upper part of the flat cutting long rod 604. A flat cutting circular plate 610 is fixedly mounted on the lower part of the flat cutting long rod 604. A lower circular plate 607 is fixedly mounted on the lower side of the flat cutting circular plate 610. The flat cutting circular plate 610 and the lower circular plate 607 are connected by a flat cutting wheel 603. The cutting support rod 609 is fixedly connected. A vertical wheel frame 608 and a horizontal wheel frame 612 are fixedly mounted on the lower circular plate 607. A lower flat cutting wheel 605 is rotatably mounted on the vertical wheel frame 608, and a horizontal wheel 606 is rotatably mounted on the horizontal wheel frame 612. The lower flat cutting wheel 605 and the horizontal wheel 606 are perpendicular to each other. An anti-detachment baffle 4 611 is fixedly mounted on the lower circular plate 607. The anti-detachment baffle 4 611 is located on one side of the horizontal wheel 606 to prevent the cutting rope 7 from falling off. The cutting rope 7 on the rope take-up chamber 9 passes over the upper flat cutting wheel 603, the lower flat cutting wheel 605 and the horizontal wheel 606 of one of the flat cutting wheel sets 6, and then passes over the horizontal wheel 606, the lower flat cutting wheel 605 and the upper flat cutting wheel 603 of the other flat cutting wheel set 6 before returning to the rope take-up chamber 9. During horizontal cutting, the two cutting frames 1 are located at the corners of adjacent positions on the reference platform 2, and the cutting rope 7 between the two transverse wheels 606 passes around all the rock cores (such as...). Figure 10 At this point, the cutting rope 7 tightens. During the tightening process, the cutting rope 7 tends to become a taut straight line between the two transverse wheels 606. Therefore, this process cuts the rock core. Finally, it is taut between the two transverse wheels 606. When the rock core is finally taken out, the weight of the rock core taken out at one time is limited. Therefore, the height of each horizontal cut is selected according to the weight, and the rock core is cut into multiple small pieces to facilitate later removal. Through the above technical solution, the pit is first divided into multiple vertical strips by the front cut, and then the connection between the rock core and the underground is cut off by the horizontal cut. This can greatly improve the construction efficiency. In addition, the horizontal cut height can be selected by driving the lifting of the front cut frame 1 to cut out rock cores of different sizes, which reduces the difficulty of taking out the rock core.

[0044] In this embodiment, the reference platform 2 is equipped with a set of casters 3, which is located between the rope take-up compartment 9 and the cutting frame 1. The cutting rope 7 exits from the rope take-up compartment 9, passes through the casters 3, and then reaches the cutting frame 1 for cutting. Figure 11As shown, the omnidirectional wheel assembly 3 includes a connecting base plate 301, which is fixedly mounted on the reference platform 2. A vertical support column 302 is fixedly mounted on the connecting base plate 301, and a horizontal support column 303 is fixedly mounted on the vertical support column 302. Intermediate rings 304 are fixedly mounted at both ends of the horizontal support column 303. A lower ring 305 and a horizontal roller bracket 306 are fixedly mounted on the lower side of the intermediate ring 304. A horizontal roller 307 is rotatably mounted on the horizontal roller bracket 306. An upper ring 308 and a vertical bracket 309 are fixedly mounted on the upper side of the intermediate ring 304. A vertical roller 310 is fixedly mounted on the vertical bracket 309. Both rollers 310 and horizontal rollers 307 are vertically arranged and perpendicular to each other. The cutting rope 7 exiting from the rope take-up compartment 9 first passes through one of the vertical rollers 310, then through the intermediate ring 304, and then is turned by the horizontal roller 307 before entering the tangent frame 1. The cutting rope 7 returning from the tangent frame 1 passes through another horizontal roller 307, then through another intermediate ring 304, and then is turned by another vertical roller 310 before returning to the rope take-up compartment 9. In other words, the function of the caster wheel assembly 3 is to allow the cutting rope 7 exiting from the rope take-up compartment 9 to enter the tangent frame 1 at a more suitable angle (e.g., ...). Figure 6 ).

[0045] like Figure 1 As shown, in this embodiment, a gantry frame 4 is installed on one side of the reference platform 2, spanning the reference platform 2. An electric hoist 404 is mounted on the gantry frame 4, and a lifting rope is attached to the electric hoist 404 for lifting the cut rock core. The gantry frame 4 includes a gantry vertical rod 401, with wheels 402 mounted at the bottom of the gantry vertical rod 401. A crossbeam 403 is fixedly mounted on the upper part of the gantry vertical rod 401, and the electric hoist 404 is mounted on the crossbeam 403. The entire gantry frame 4 is existing technology. The rock core is removed by lifting with the electric hoist 404. In this embodiment, a tensioning device is installed at the end of the lifting rope. After drilling holes at the four corners, the drill bit 118 also drills a hole in the middle of the pit (e.g., ...). Figure 7 The electric hoist 404 drives the tensioning device into the round hole to tighten it, and then it rises to remove the rock core.

[0046] A method for constructing a foundation pit includes the following steps: Step 1: Installation; Select a suitable construction location to install the reference platform 2, install expansion pipes on the ground, and then fix the reference platform 2 on the ground.

[0047] Step 2: Adjustment; Install the tangent frame 1 and drill bit 118. During installation, adjust the position of the fixing plate 103 on the track 101, rotate the adjusting plate 104 to adjust the angle, and when the position is adjusted to a suitable position, fix the adjusting ear 105 to the fixing seat 106. Use the locking shaft 110 to fix the locking block 109 to the track 101, and fix the drill bit 118 on the connector 114.

[0048] Step 3: Drilling; According to the required shape of the foundation pit, drill multiple holes evenly at the edge. If the drilling depth of the drill bit 118 is insufficient, tighten the drill bit 118 with the fixing ring 115, lift the drilling machine 113, and then install a new drill bit 118 for connection. Then adjust the position of the tangent frame 1 and drill round holes in the foundation pit construction area.

[0049] Step 4: Tangent cutting; Remove drill bit 118 and replace it with tangent wheel assembly 5. Install rope take-up chamber 9 and universal wheel assembly 3 on the reference platform 2. The cutting rope 7 on the rope take-up chamber 9 changes direction through universal wheel assembly 3 and wraps around tangent wheel assembly 5, and connects to the adjacent tangent wheel assembly 5. Finally, it returns to the rope take-up chamber 9. The cutting rope 7 between the bottoms of the two adjacent lower tangent wheels 505 cuts the ground. The drilling rig 113 descends, driving the cutting rope 7 to descend and cut. By cutting different positions, the entire edge of the pit is cut out. Then, the cutting rope 7 is wrapped around the two diagonally opposite tangent wheel assemblies 5, dividing the entire rock core in the middle into two halves.

[0050] Step 5: Flat Cutting; Retrieve the cutting rope 7 and remove the tangent wheel set 5. Install the flat cutting wheel set 6 on the tangent frame 1. Wrap the cutting rope 7 around the upper flat cutting wheel 603 and the lower flat cutting wheel 605, and finally exit from the transverse wheel 606. The adjacent tangent frame 1 is also equipped with a flat cutting wheel set 6. The cutting rope 7 wraps around the adjacent transverse wheel 606, and then returns to the rope take-up chamber 9 through the lower flat cutting wheel 605 and the upper flat cutting wheel 603. The cutting rope 7 between the two transverse wheels 606 is not taut and wraps around the entire rock core. When the cutting rope 7 between the two transverse wheels 606 is tightened, the lower side of the rock core is flat cut.

[0051] Step Six: Core Extraction; Install the gantry crane 4, move the gantry crane 4 to the corresponding position, insert the hoisting rope of the electric hoist 404 into the round hole, tighten the tensioning device and rise to remove the rock core.

[0052] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A foundation pit construction device, characterized in that, The system includes a reference platform (2), on which multiple tangent frames (1) are mounted. Drill bits (118) are detachably mounted on the tangent frames (1) for drilling. After removing the drill bits (118), a tangent wheel assembly (5) is installed. After removing the tangent wheel assembly (5), a flat cutting wheel assembly (6) is installed. A cutting rope (7) is installed between the two tangent wheel assemblies (5). The tangent wheel assembly (5) drives the cutting rope (7) to cut downwards. A cutting rope (7) is installed between the two flat cutting wheel assemblies (6) to cut the pit flat. The reference platform (2) is equipped with a rope take-up chamber (9), and the cutting rope (7) is wound around the rope take-up chamber (9). The tangent frame (1) includes a track (101), which is fixedly installed on the reference platform (2). An adjustment plate (104) is mounted on the track (101), and a support vertical rod (111) is fixedly mounted on the adjustment plate (104). A drill (113) is slidably mounted on the support vertical rod (111). The drill (113) moves up and down within the support vertical rod (111) via a gear and rack. A connector (114) is mounted at the output end of the drill (113), and the connector (114) is connected to the drill bit (118). The reference platform (2) includes four sets of symmetrically arranged reference frames one (201) and reference frames two (203). The reference frames one (201) and reference frames two (203) are fixedly connected. The four sets of reference frames one (201) and reference frames two (203) form a square inside. Long plates (202) are fixedly installed at the four corners. The tangent frame (1) is fixedly installed on the long plates (202). The tangential wheel assembly (5) includes a tangential flange (501), which is fixedly installed on the connector (114). A tangential long rod (504) is fixedly installed on the lower side of the tangential flange (501). An upper tangential wheel (503) is rotatably installed on the upper part of the tangential long rod (504), and a lower tangential wheel (505) is rotatably installed on the lower part of the tangential long rod (504). The cutting rope (7) on the rope take-up chamber (9) passes around the upper tangential wheel (503) and the lower tangential wheel (505), and then passes around the lower tangential wheel (505) and the upper tangential wheel (503) on another tangential wheel assembly (5) and returns to the rope take-up chamber (9). The flat cutting wheel assembly (6) includes a flat cutting flange (601), which is fixedly installed on the drilling rig (113). A flat cutting long rod (604) is fixedly installed on the lower side of the flat cutting flange (601). An upper flat cutting wheel (603) is rotatably installed on the upper part of the flat cutting long rod (604). A flat cutting circular plate (610) is fixedly installed on the lower part of the flat cutting long rod (604). A lower circular plate (607) is fixedly installed on the lower side of the flat cutting circular plate (610). A vertical wheel frame (608) and a horizontal wheel frame (612) are fixedly installed on the lower circular plate (607). A lower flat cutting wheel (605) is rotatably installed on the vertical wheel frame (608). A horizontal wheel (606) is rotatably installed on the horizontal wheel frame (612). The lower flat cutting wheel (605) and the horizontal wheel (606) are perpendicular to each other. The reference platform (2) is equipped with a set of casters (3), which is located between the rope take-up chamber (9) and the cutting frame (1). The cutting rope (7) comes out of the rope take-up chamber (9), passes through the set of casters (3), and then reaches the cutting frame (1) for cutting.

2. The foundation pit construction equipment according to claim 1, characterized in that, The track (101) and the adjusting plate (104) are adjustable. A mating block (102) is slidably mounted on the track (101). A fixing plate (103) is fixedly mounted on the mating block (102). A connecting ear two (108) and a fixing seat (106) are fixedly mounted on the fixing plate (103). A connecting ear one (107) is hinged to the connecting ear two (108). The connecting ear one (107) is fixedly connected to the adjusting plate (104). The end of the adjusting plate (104) is fixedly mounted with... There is an adjusting ear (105), and an arc groove (119) is provided on the adjusting ear (105). The adjusting plate (104) is adjusted by rotating the connecting ear (107), and the angle is fixed by locking the nut in the arc groove (119). A locking block (109) is fixedly installed on the lower side of the fixing plate (103). A locking shaft (110) is installed on the locking block (109). The locking shaft (110) presses against the track (101) to fix the fixing plate (103) and the track (101).

3. The foundation pit construction equipment according to claim 2, characterized in that, The adjusting plate (104) is fixedly equipped with a vertical plate (116) and a connecting plate (117). Two fixing rings (115) are hinged on the vertical plate (116). The ends of the fixing rings (115) are fixed to the connecting plate (117) by bolts. The two fixing rings (115) are used to fix the drill bit (118).

4. The foundation pit construction equipment according to claim 3, characterized in that, A gantry (4) is installed on one side of the reference platform (2), the gantry (4) spans the reference platform (2), an electric hoist (404) is installed on the gantry (4), a hoist (404) is installed on the electric hoist (404), and a tensioning device is installed at the end of the hoist to lift the cut rock core.

5. A method for constructing a foundation pit, characterized in that, Using the construction equipment as described in claim 4 includes the following steps: Step 1: Installation; Select a suitable construction location to install the reference platform (2), install expansion pipes on the ground, and then fix the reference platform (2) on the ground; Step 2: Adjustment; Install the tangent frame (1) and drill bit (118). During installation, adjust the position of the fixing plate (103) on the track (101), and rotate the adjusting plate (104) to adjust the angle. When the position is adjusted to a suitable position, fix the adjusting ear (105) to the fixing seat (106), and use the locking shaft (110) to fix the locking block (109) and the track (101). Then fix the drill bit (118) on the connector (114). Step 3: Drilling; According to the required shape of the foundation pit, drill multiple holes evenly at the edge. If the drilling depth of the drill bit (118) is insufficient, tighten the drill bit (118) with the fixing ring (115), lift the drilling machine (113), and then install a new drill bit (118) for connection. Then adjust the position of the tangent frame (1) and drill round holes in the foundation pit construction area. Step 4: tangential cutting; remove the drill bit (118) and replace it with a tangential wheel assembly (5). Install a rope take-up chamber (9) and a universal wheel assembly (3) on the reference platform (2). The cutting rope (7) on the rope take-up chamber (9) changes direction through the universal wheel assembly (3) and wraps around the tangential wheel assembly (5), and connects to the adjacent tangential wheel assembly (5). Finally, it returns to the rope take-up chamber (9). The cutting rope (7) between the bottoms of the two adjacent tangential wheel assemblies (5) cuts the ground. The drilling rig (113) descends, driving the cutting rope (7) to descend and cut. By cutting different positions, the entire edge of the pit is cut out. Then, the cutting rope (7) is wrapped around the two diagonally opposite tangential wheel assemblies (5) to divide the entire rock core in the middle into two halves. Step 5: Flat cutting; retract the cutting rope (7) and remove the tangent wheel set (5), install the flat cutting wheel set (6) on the tangent frame (1), pass the cutting rope (7) around the upper flat cutting wheel (603) and the lower flat cutting wheel (605), and finally pass it out from the transverse wheel (606). The adjacent tangent frame (1) is also equipped with a flat cutting wheel set (6), and passes it around the adjacent transverse wheel (606), and then returns to the rope take-up chamber (9) through the lower flat cutting wheel (605) and the upper flat cutting wheel (603). The cutting rope (7) between the two transverse wheels (606) is not taut and passes around the entire rock core. When the cutting rope (7) between the two transverse wheels (606) is tightened, the lower side of the rock core is flat cut. Step 6: Core extraction; Install the gantry frame (4), move the gantry frame (4) to the corresponding position, insert the hoisting rope (404) into the round hole, tighten the tensioning device and rise to extract the rock core.

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