Dustproof noise-reduction green excavation construction method for rock mass of rock foundation pit adjacent to building

Abstract

The invention relates to the technical field of foundation pits, and discloses an adjacent building rock foundation pit rock mass dustproof noise reduction green excavation construction method which comprises the following construction steps that (1) rock blocks are excavated on a rock mass, and the rock blocks and the rock mass form a joint surface; (2) horizontally drilling at the intersection of the joint surfaces to form two horizontal channels, and penetrating through the free surface to form a horizontal opening; longitudinally drilling at the intersection of the two joint surfaces to form a longitudinal channel, enabling the bottom and the two horizontal channels to form an intersection position, and enabling the longitudinal channel to penetrate through the top of the rock block to form a longitudinal opening; longitudinally drilling holes in the rock mass to form splitting holes; (3) a saw rope penetrates through the horizontal channel and the longitudinal channel, so that the rock block and the rock mass are disconnected; a saw rope sequentially penetrates through the two horizontal channels, so that the bottom of the rock block is disconnected from the rock mass; (4) a splitting rod is inserted into the splitting hole, so that a splitting crack is formed in the rock block; (5) a hook shovel is inserted into the splitting crack, and the rock block is broken into a plurality of block bodies; and dust and noise pollution caused by rock crushing is avoided.

Description

Technical Field

[0001] The patent of this invention relates to the technical field of foundation pits, specifically, to a green excavation construction method for dust prevention and noise reduction of rock masses in rock foundation pits adjacent to buildings. Background Art

[0002] Rock foundation pit excavation is particularly important in modern urban construction, especially in the development of high-rise buildings and underground space. With the shortage of urban land and the increase in the utilization of underground space, the depth of foundation pit excavation is also increasing, often facing complex geological conditions and surrounding environment.

[0003] During the excavation of rock foundation pits, dust and noise pollution are the main factors affecting the environment.

[0004] In the existing technology, open blasting, static blasting, carbon dioxide fracturing and other processes are mostly used for rock foundation pit excavation; among them, the open blasting method is noisy and dusty, and may cause flying rocks, which is highly dangerous; static blasting adopts the method of drilling static blasting holes and then filling them with explosive fracturing. The number of static blasting holes drilled is large, the noise is loud, and the dust pollution is serious. In addition, the further detonation and crushing of the rock mass after the static blasting will continue to generate a lot of noise; the use of rope saws and carbon dioxide fracturing processes requires the drilling of a large number of rope saw holes, and the separated rock mass needs to be crushed again after fracturing, and the construction process generates a lot of noise and dust.

[0005] The above three methods will generate a lot of noise and dust, causing pollution and adverse effects on the surrounding environment, and thus cannot meet the requirements of green and environmentally friendly construction. Summary of the Invention

[0006] The purpose of the present invention is to provide a green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building, aiming to solve the problem of poor control of dust and noise pollution in the existing technology during the excavation of a rock foundation pit.

[0007] The present invention is achieved by: a green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building, comprising the following construction steps:

[0008] 1) Arrange the construction site and determine the rock blocks to be excavated on the rock mass. The rock blocks have an outer free surface and an end free surface. The rock blocks are combined with the rock mass to form a bottom joint surface and two end joint surfaces. The bottom joint surface is arranged horizontally, and the end joint surfaces are arranged vertically.

[0009] 2) Drilling holes horizontally at the intersection of the bottom joint surface and the two end joint surfaces to form two horizontal channels, the outer ends of the two horizontal channels correspondingly penetrate the outer free surface and the end free surface respectively to form horizontal openings; drilling holes longitudinally at the intersection of the two end joint surfaces to form a longitudinal channel, the bottom of the longitudinal channel is connected to the inner ends of the two horizontal channels to form a junction, and the top of the longitudinal channel penetrates the top of the rock block to form a longitudinal opening;

[0010] Drilling longitudinally in the rock mass to form a plurality of longitudinally arranged splitting holes, wherein the bottoms of the splitting holes extend to the bottom joint surface;

[0011] 3) Passing the saw rope through a horizontal channel and a longitudinal channel in sequence, pulling the saw rope to cut one end joint surface, passing the saw rope through another horizontal channel and a longitudinal channel, pulling the saw rope to cut the other end joint surface, so as to disconnect the two ends of the rock block from the rock mass;

[0012] Passing a saw wire through two horizontal channels in sequence, and pulling the saw wire to cut the bottom joint surface, so as to disconnect the bottom of the rock block from the rock mass;

[0013] 4) inserting the splitting rods into the multiple splitting holes in sequence to squeeze and crack the rock block, so as to form multiple splitting cracks in the rock block;

[0014] 5) Insert an eagle claw-shaped hook into the crack to break the rock into multiple blocks, and then transport the blocks out of the foundation pit.

[0015] Furthermore, in the construction step 2), a horizontal drilling rig is used to drive a horizontal drill rod to drill horizontal holes in the rock block to form the two horizontal channels; the horizontal drilling rig is covered with a noise reduction sleeve made of elastic rubber, and the noise reduction sleeve is arranged along the outer periphery of the horizontal drilling rig.

[0016] Furthermore, in the construction step 2), during the process of the horizontal drill rod drilling to form a horizontal channel, the drilling opening is covered with a dust cover, and the drill rod passes through the dust cover and the horizontal opening to drill horizontally in the rock block.

[0017] Furthermore, in the construction step 2), during the process of using a longitudinal drill rig to drive a longitudinal drill rod to drill into the rock block to form a longitudinal channel and a cleavage hole, a protective shed is arranged on the rock block, the longitudinal drill rig is placed in the protective shed, and the top of the protective shed has a closed skylight;

[0018] A ventilation device is provided on the side of the protective shed, which extracts the internal air in the protective shed and discharges the internal air out of the protective shed after filtering. The ventilation device also discharges the external air into the interior of the protective shed simultaneously.

[0019] Furthermore, a sprinkler is arranged inside the protective shed, and the sprinkler is arranged above the rock block; in the construction step 2), when a longitudinal drill rig is used to drive a longitudinal drill rod to drill into the rock block to form a longitudinal channel and a splitting hole, the sprinkler sprays water mist from top to bottom to reduce dust in the internal air of the protective shed.

[0020] Furthermore, in the construction step 2), the protective shed is constructed of sound insulation boards, the sound insulation boards are covered with a plurality of cross-arranged square tubes, and the plurality of square tubes laterally support the sound insulation boards; the sound insulation boards include two layers of aluminum plates arranged at intervals, and a sound insulation gap is provided between the two layers of aluminum plates;

[0021] The sound insulation space is provided with a plurality of inner skeletons arranged at intervals, and the plurality of inner skeletons support the two aluminum plates in a relatively fixed state; the sound insulation space is filled with a sound insulation layer made of rock wool, and the sound insulation layer wraps the inner skeleton.

[0022] Furthermore, in the construction step 3), a horizontal water spray pipe is arranged in the horizontal opening. During the process of the saw rope cutting the bottom joint surface, the horizontal water spray pipe sprays water into the horizontal channel. The water flows along the two horizontal channels in sequence, soaking the two horizontal channels and the saw rope.

[0023] Furthermore, in the construction step 3), a longitudinal water spray pipe is arranged in the longitudinal opening. During the process of the saw rope cutting the end joint surface, the longitudinal water spray pipe sprays water from top to bottom into the longitudinal channel. The water flows along the longitudinal channel and the horizontal channel in sequence, soaking the longitudinal channel and the horizontal channel.

[0024] Furthermore, in the construction step 4), one side of the splitting rod forms a fixed side, and the other side of the splitting rod is provided with a plurality of hydraulic plungers that are radially retractable relative to the splitting rod, and the plurality of hydraulic plungers are spaced apart along the axial direction of the splitting rod;

[0025] In the construction step 4), the splitting rod is hoisted into the splitting hole, with a cracking gap between the bottom of the splitting rod and the bottom of the splitting hole; after the fixed side is abutted against the inner wall of the splitting hole, the multiple hydraulic plungers are radially extended away from the splitting rod until the multiple hydraulic plungers are pressed against the inner wall of the splitting hole, and after the splitting rod remains in a fixed state in the splitting hole, the multiple hydraulic plungers are continued to be driven to radially extend away from the splitting rod until the splitting rod breaks the rock block to form a splitting crack of a set length.

[0026] Furthermore, in the construction step 4), the hydraulic plunger has a pressing end for pressing against the rock block, the middle of the pressing end is recessed to form a recessed groove, and both sides of the pressing end form side ends respectively. The hydraulic plunger is provided with a hydraulic impact rod, and the hydraulic impact rod extends into the recessed groove;

[0027] When the fixed side is fixedly abutted against the inner wall of the splitting hole, and the two side ends are fixedly pressed against the inner wall of the splitting hole, an impact gap is formed between the impact rod and the inner wall of the splitting hole; when the hydraulic plunger continues to extend radially away from the splitting rod, the impact rod synchronously reciprocates and contracts, impacting the inner wall of the splitting hole in an interval shape until the splitting rod breaks the rock block to form a splitting crack of a set length.

[0028] Compared with the existing technology, the green excavation construction method for preventing dust and reducing noise in rock foundation pits adjacent to buildings provided by the present invention has the following specific technical effects:

[0029] 1) Rock excavation is carried out by saw wire cutting and splitting rod expansion, avoiding the large amount of dust generated by crushing rocks during traditional blasting and mechanical crushing;

[0030] During the actual construction process, the saw wire cutting produces almost no dust, and the splitting bar extrusion and fracturing method only produces a small amount of dust locally. Compared with the existing excavation method, the dust emission is greatly reduced, thus achieving effective control of dust pollution.

[0031] 2) Traditional blasting and mechanical crushing methods generate high-intensity noise during construction, causing serious disturbance to surrounding residents and buildings. However, the use of saw wire cutting and splitting rod expansion significantly reduces noise levels. The saw wire cutting process is quiet, and the splitting rod extrusion process only produces slight local vibrations, which will not cause significant noise pollution to the surrounding environment.

[0032] 3) By setting up horizontal and vertical channels and performing cutting and breaking operations in sequence, the cutting range and shape of the rock blocks can be better controlled, avoiding the over-excavation or under-excavation problems caused by blasting or mechanical crushing in traditional methods, and improving the overall construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a flow chart of a green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building provided by the present invention;

[0034] Figure 2 It is a schematic flow chart of the rock cutting process provided by the present invention;

[0035] Figure 3 It is a three-dimensional cross-sectional schematic diagram of the protective shed provided by the present invention;

[0036] Figure 4 It is a structural schematic diagram of the sound insulation board provided by the present invention;

[0037] Figure 5 This is a schematic diagram of the working state of the splitting rod provided by the present invention;

[0038] Figure 6 It is a structural schematic diagram of the pressing end provided by the present invention;

[0039] Figure 7 It is a schematic front view of the hook shovel provided by the present invention;

[0040] In the figure: rock mass 100, outer free surface 101, end free surface 102, saw rope 103, dust cover 104, hook shovel 105, hook shovel head 106;

[0041] Horizontal channel 200, longitudinal channel 201, splitting hole 202, splitting rod 203, fixed side 204, hydraulic plunger 205, pressing end 206, recessed groove 207, side end 208, impact rod 209, impact spacer 210;

[0042] Protective shed 300 , skylight 301 , ventilation equipment 302 , sprinkler 303 , square tube 304 , aluminum plate 305 , inner frame 306 , sound insulation layer 307 . DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0044] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0045] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0046] Reference Figure 1-7 The figure shows a preferred embodiment of the present invention.

[0047] A green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building is characterized by comprising the following construction steps:

[0048] 1) Arrange the construction site and determine the rock blocks to be excavated on the rock mass 100. The rock blocks have an outer free surface 101 and an end free surface 102. The rock blocks are combined with the rock mass 100 to form a bottom joint surface and two end joint surfaces. The bottom joint surface is arranged horizontally, and the end joint surfaces are arranged vertically.

[0049] 2) Drill holes horizontally at the intersection of the bottom joint surface and the two end joint surfaces to form two horizontal channels 200. The outer ends of the two horizontal channels 200 pass through the outer free surface 101 and the end free surface 102, respectively, to form horizontal openings. Drill holes longitudinally at the intersection of the two end joint surfaces to form a longitudinal channel 201. The bottom of the longitudinal channel 201 is connected to the inner ends of the two horizontal channels 200 to form a junction. The top of the longitudinal channel 201 passes through the top of the rock block to form a longitudinal opening.

[0050] Drilling holes longitudinally in the rock mass 100 to form a plurality of longitudinally arranged split holes 202, wherein the bottoms of the split holes 202 extend to the bottom joint surface;

[0051] 3) Passing the saw rope 103 through a horizontal channel 200 and a longitudinal channel 201 in sequence, pulling the saw rope 103 to cut one end joint surface, passing the saw rope 103 through another horizontal channel 200 and a longitudinal channel 201, pulling the saw rope 103 to cut the other end joint surface, so that the two ends of the rock block are disconnected from the rock mass 100;

[0052] Pass the saw rope 103 through the two horizontal channels 200 in sequence, and pull the saw rope 103 to cut the bottom joint surface, so that the bottom of the rock block is disconnected from the rock mass 100;

[0053] 4) Inserting the splitting rods 203 into the plurality of splitting holes 202 in sequence to squeeze and fracture the rock block, thereby forming a plurality of splitting cracks in the rock block;

[0054] 5) Use the eagle claw-shaped hook shovel 105 to insert into the splitting crack to break the rock into multiple blocks, and then transport the multiple blocks out of the foundation pit.

[0055] The above-mentioned green excavation construction method for dust and noise reduction in rock foundation pits adjacent to buildings has the following specific technical effects:

[0056] 1) Excavating the rock mass 100 by cutting with the saw wire 103 and fracturing with the splitting rod 203 avoids the large amount of dust generated by crushing the rock during traditional blasting and mechanical crushing;

[0057] During the actual construction process, the saw wire 103 produces almost no dust when cutting, and the splitting rod 203 produces only a small amount of dust locally when squeezing and rupturing. Compared with the existing excavation method, the dust emission is greatly reduced, thus achieving effective control of dust pollution.

[0058] 2) Traditional blasting and mechanical crushing methods generate high-intensity noise during construction, causing serious disturbance to surrounding residents and buildings. However, the noise level is significantly reduced by the saw wire 103 cutting and the splitting rod 203 expanding method. The saw wire 103 produces low noise during cutting, and the splitting rod 203 squeezing process only produces slight local vibrations, which will not cause significant noise pollution to the surrounding environment.

[0059] 3) By setting up the horizontal channel 200 and the longitudinal channel 201 and performing cutting and breaking operations in sequence, the cutting range and shape of the rock blocks can be better controlled, avoiding the over-excavation or under-excavation problems caused by blasting or mechanical crushing in traditional methods, and improving the overall construction efficiency.

[0060] In this embodiment, in construction step 2), a horizontal drill rig is used to drive a horizontal drill rod to drill horizontal holes in the rock block to form two horizontal channels 200; the horizontal drill rig is covered with a noise reduction sleeve made of elastic rubber, and the noise reduction sleeve is arranged to cover the outer periphery of the horizontal drill rig.

[0061] The noise reduction sleeve can effectively block some of the noise generated by the horizontal drill during the drilling process, reduce the spread of noise to the surrounding environment, and thus reduce the construction noise to a certain extent, which helps to control the noise pollution during the excavation of the rock mass 100 of the rock foundation pit.

[0062] In this embodiment, in construction step 2), during the process of the horizontal drill rod drilling to form the horizontal channel 200, the drilling opening is covered with a dust cover 104, and the drill rod passes through the dust cover 104 and the horizontal opening to drill horizontally in the rock block.

[0063] In this way, the dust cover 104 can confine the dust generated during the drilling process inside it, preventing the dust from directly diffusing into the external environment, thereby effectively controlling the escape of dust and reducing pollution to the surrounding air environment.

[0064] In this embodiment, in construction step 2), while a longitudinal drill rig is used to drive a longitudinal drill rod to drill into the rock block to form the longitudinal channel 201 and the cleavage hole 202, a protective shed 300 is arranged on the rock block, and the longitudinal drill rig is placed in the protective shed 300. The top of the protective shed 300 has a closed skylight 301.

[0065] A ventilation device 302 is provided on the side of the protective shed 300 . The ventilation device 302 extracts the internal air in the protective shed 300 and discharges the internal air out of the protective shed 300 after filtering. The ventilation device 302 simultaneously discharges the external air into the interior of the protective shed 300 .

[0066] The protective shed 300 is used to provide a relatively closed working space for the longitudinal drilling rig, and the setting of the ventilation equipment 302 realizes the circulation and purification of the air in the protective shed 300. On the one hand, the dust generated during the drilling process can be discharged through filtration, reducing the accumulation of dust in the protective shed 300 and reducing the harm to the health of construction workers; on the other hand, by discharging the air in the protective shed 300 and introducing fresh air from the outside, the relative stability of the air quality in the protective shed 300 is maintained, further improving the construction environment.

[0067] In this embodiment, a sprinkler 303 is arranged inside the protective shed 300, and the sprinkler 303 is arranged above the rock block; in construction step 2), when a longitudinal drill rig is used to drive a longitudinal drill rod to drill into the rock block to form a longitudinal channel 201 and a splitting hole 202, the sprinkler 303 sprays water mist from top to bottom to reduce dust in the internal air of the protective shed 300.

[0068] The water mist sprayed by the sprinkler 303 can combine with the dust particles generated during the drilling process in the protective shed 300, causing the dust particles to increase in weight and then settle, thereby effectively reducing the suspended concentration of dust in the protective shed 300, further enhancing the dust control effect, and reducing the pollution of dust to the surrounding environment.

[0069] In this embodiment, in construction step 2), the protective shed 300 is constructed of a sound insulation board, which is covered with a plurality of cross-arranged square tubes 304. The plurality of square tubes 304 laterally support the sound insulation board. The sound insulation board includes two layers of aluminum plates 305 arranged at intervals, with a sound insulation gap between the two layers of aluminum plates 305.

[0070] The sound insulation space is provided with a plurality of inner skeletons 306 arranged at intervals, and the plurality of inner skeletons 306 support the two aluminum plates 305 in a relatively fixed state; the sound insulation space is filled with a sound insulation layer 307 made of rock wool, and the sound insulation layer 307 wraps the inner skeleton 306.

[0071] The protective shed 300 with the sound insulation layer 307 has good sound insulation performance and can effectively block the noise generated by the longitudinal drill during the drilling process from propagating outward, thereby significantly reducing construction noise.

[0072] In this embodiment, in construction step 3), a horizontal water spray pipe is arranged in the horizontal opening. During the process of the saw rope 103 cutting the bottom joint surface, the horizontal water spray pipe sprays water into the horizontal channel 200. The water flows along the two horizontal channels 200 in sequence, soaking the two horizontal channels 200 and the saw rope 103.

[0073] By soaking in water, dust particles generated during the cutting process of the saw wire 103 can be settled in the horizontal channel 200, preventing the dust from diffusing into the external environment with the air flow, thereby effectively suppressing the escape of dust.

[0074] In this embodiment, in construction step 3), a longitudinal water spray pipe is arranged in the longitudinal opening. During the process of the saw rope 103 cutting the end joint surface, the longitudinal water spray pipe sprays water from top to bottom into the longitudinal channel 201. The water flows along the longitudinal channel 201 and the horizontal channel 200 in sequence, soaking the longitudinal channel 201 and the horizontal channel 200.

[0075] In this way, the jetted water forms a water barrier in the longitudinal channel 201 and the horizontal channel 200 , which can capture and settle dust particles generated during the cutting process of the saw wire 103 , further reducing the diffusion of dust and enhancing the dust control effect.

[0076] In this embodiment, during the actual construction of the saw rope 103 cutting the rock, the rock mass 100 will be marked with its position first, and then the saw rope 103 will be constructed according to the process:

[0077] First, the saw rope 103 is passed through a horizontal channel 200 (CF) and a longitudinal channel 201 (AF) in sequence, and the saw rope 103 is pulled to cut an end joint surface (ABCF);

[0078] Second, the saw rope 103 is passed through the two horizontal channels 200 (CF, EF) in sequence, and the saw rope 103 is pulled to cut the bottom joint surface (CDEF) so as to disconnect the bottom of the rock block from the rock mass 100;

[0079] In the third step, the saw rope 103 is passed through another horizontal channel 200 (EF) and the longitudinal channel 201 (AF), and the saw rope 103 is pulled to cut another end joint surface (AFEG).

[0080] Through precise orientation marking, rock blocks of appropriate size can be cut according to actual construction conditions, thereby improving construction efficiency. Strictly following the cutting procedures can ensure that the rock blocks remain relatively stable during the cutting process, avoiding unbalanced collapse and safety accidents.

[0081] In this embodiment, in construction step 4), one side of the splitting rod 203 forms a fixed side 204, and the other side of the splitting rod 203 has multiple hydraulic plungers 205 that are radially retractable relative to the splitting rod 203. The multiple hydraulic plungers 205 are arranged at intervals along the axial direction of the splitting rod 203;

[0082] In construction step 4), the splitting rod 203 is hoisted into the splitting hole 202, with a cracking gap between the bottom of the splitting rod 203 and the bottom of the splitting hole 202; after the fixed side 204 is abutted against the inner wall of the splitting hole 202, multiple hydraulic plungers 205 are radially extended away from the splitting rod 203 until the multiple hydraulic plungers 205 are pressed against the inner wall of the splitting hole 202, and the splitting rod 203 remains in a fixed state in the splitting hole 202, and then the multiple hydraulic plungers 205 are continued to be driven to radially extend away from the splitting rod 203 until the splitting rod 203 breaks the rock block to form a splitting crack of a set length.

[0083] The rock blocks are precisely broken by the expansion and contraction of the hydraulic plunger 205, thereby avoiding the strong vibration and noise that may be generated by traditional blasting or mechanical crushing methods, thereby reducing construction noise to a certain extent.

[0084] In this embodiment, in construction step 4), the hydraulic plunger 205 has a pressing end 206 for pressing against the rock block. The middle of the pressing end 206 is recessed to form a recessed groove 207. Side ends 208 are formed on both sides of the pressing end 206. A hydraulic impact rod 209 is provided in the hydraulic plunger 205, and the hydraulic impact rod 209 extends into the recessed groove 207.

[0085] When the fixed side 204 is fixedly abutted against the inner wall of the splitting hole 202, and the two side ends 208 are fixedly pressed against the inner wall of the splitting hole 202, an impact gap 210 is formed between the impact rod 209 and the inner wall of the splitting hole 202; when the hydraulic plunger 205 continues to extend radially away from the splitting rod 203, the impact rod 209 synchronously reciprocates and contracts, impacting the inner wall of the splitting hole 202 in an interval shape until the splitting rod 203 breaks the rock block to form a splitting crack of a set length.

[0086] The interval impact mode of the hydraulic impact rod 209 can reduce unnecessary damage to the surrounding rock mass 100 while ensuring the fracturing effect, avoid the additional noise and dust that may be generated by excessive impact, and further optimize the noise and dust control effect during the construction process.

[0087] In this embodiment, when horizontal drilling is performed to form the horizontal channel 200, a noise reduction sleeve is provided at the drilling rig motor. The noise reduction sleeve is made of rubber material. Rubber has good elasticity and damping properties, and can effectively absorb and reduce the transmission of sound waves, thereby reducing the propagation of sound.

[0088] An arc-shaped hard plastic dust cover 104 is set at the borehole mouth to prevent rock chips and dust from splashing irregularly under high wind pressure. At the same time, a dust-proof water pipe is set at the hole mouth to prevent the rock chips and dust intercepted by the protective cover, thereby achieving low dust and noise reduction operation.

[0089] In this embodiment, the saw rope 103 is cut by the saw rope 103 being driven by the rope saw motor, and the saw rope 103 moves around the cutting surface at high speed and grinds to complete the cutting;

[0090] During cutting, the saw rope 103 is first fixed to the position to be cut of the rock mass 100 with a clamping device. After the driving device system is turned on, the rope saw motor drives the saw rope 103 to operate at high speed. At the same time, the walking motor drives the rope saw motor forward and backward on the track to keep the saw rope 103 in a tensioned state during operation. The diamonds embedded in the saw rope 103 grind the rock at high speed to complete the cutting of the rock. The noise generated during the cutting process is low, which can achieve noise reduction operations and ensure smooth cutting work.

[0091] In this embodiment, when the excavator is working with the hook shovel 105, the hook shovel head 106 extends into the rock cracks, enlarging the cracks already generated inside the rock to loosen the rock, loosening and fragmenting the rock mass 100. During this period, the contact area between the hook shovel 105 and the rock is small, and the noise and dust generated are low. Combined with the dust prevention of the mist cannon, dust and noise reduction construction can be achieved.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A green excavation construction method for dust and noise reduction in rock foundation pits adjacent to buildings, characterized by: The construction steps include: 1) Arrange the construction site and determine the rock blocks to be excavated on the rock mass. The rock blocks have an outer free surface and an end free surface. The rock blocks are combined with the rock mass to form a bottom joint surface and two end joint surfaces. The bottom joint surface is arranged horizontally, and the end joint surfaces are arranged vertically. 2) Drilling holes horizontally at the intersection of the bottom joint surface and the two end joint surfaces to form two horizontal channels, the outer ends of the two horizontal channels correspondingly penetrate the outer free surface and the end free surface respectively to form horizontal openings; drilling holes longitudinally at the intersection of the two end joint surfaces to form a longitudinal channel, the bottom of the longitudinal channel is connected to the inner ends of the two horizontal channels to form a junction, and the top of the longitudinal channel penetrates the top of the rock block to form a longitudinal opening; Drilling longitudinally in the rock mass to form a plurality of longitudinally arranged splitting holes, wherein the bottoms of the splitting holes extend to the bottom joint surface; 3) Passing the saw rope through a horizontal channel and a longitudinal channel in sequence, pulling the saw rope to cut one end joint surface, passing the saw rope through another horizontal channel and a longitudinal channel, pulling the saw rope to cut the other end joint surface, so as to disconnect the two ends of the rock block from the rock mass; Passing a saw wire through two horizontal channels in sequence, and pulling the saw wire to cut the bottom joint surface, so as to disconnect the bottom of the rock block from the rock mass; 4) inserting the splitting rods into the multiple splitting holes in sequence to squeeze and crack the rock block, so as to form multiple splitting cracks in the rock block; 5) Insert an eagle claw-shaped hook into the crack to break the rock into multiple blocks, and then transport the multiple blocks out of the foundation pit.

2. The green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building as claimed in claim 1, characterized in that: In the construction step 2), a horizontal drilling rig is used to drive a horizontal drill rod to drill horizontal holes in the rock block to form the two horizontal channels; the horizontal drilling rig is covered with a noise reduction sleeve made of elastic rubber, and the noise reduction sleeve is arranged to cover the outer periphery of the horizontal drilling rig.

3. The green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building as claimed in claim 2, characterized in that: In the construction step 2), during the process of the horizontal drill rod drilling to form the horizontal channel, the drilling opening is covered with a dust cover, and the drill rod passes through the dust cover and the horizontal opening to drill horizontally in the rock block.

4. The green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building according to any one of claims 1 to 3, characterized in that: In the construction step 2), a protective shed is arranged on the rock block during the process of using a longitudinal drill rig to drive a longitudinal drill rod to drill a longitudinal channel and a cleavage hole in the rock block. The longitudinal drill rig is placed in the protective shed, and the top of the protective shed has a closed skylight; A ventilation device is provided on the side of the protective shed, which extracts the internal air in the protective shed and discharges the internal air out of the protective shed after filtering. The ventilation device also discharges the external air into the interior of the protective shed simultaneously.

5. The green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building as claimed in claim 4, characterized in that: A sprinkler is arranged inside the protective shed, and the sprinkler is arranged above the rock block; in the construction step 2), during the process of using a longitudinal drill rig to drive a longitudinal drill rod to drill into the rock block to form a longitudinal channel and a splitting hole, the sprinkler sprays water mist from top to bottom to reduce dust in the internal air of the protective shed.

6. The green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building as claimed in claim 4, characterized in that: In the construction step 2), the protective shed is constructed of sound insulation boards, which are covered with a plurality of cross-arranged square tubes, and the plurality of square tubes laterally support the sound insulation boards; the sound insulation boards include two layers of aluminum plates arranged at intervals, with a sound insulation gap between the two layers of aluminum plates; The sound insulation space is provided with a plurality of inner skeletons arranged at intervals, and the plurality of inner skeletons support the two aluminum plates in a relatively fixed state; the sound insulation space is filled with a sound insulation layer made of rock wool, and the sound insulation layer wraps the inner skeleton.

7. The green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building according to any one of claims 1 to 3, characterized in that: In the construction step 3), a horizontal water spray pipe is arranged in the horizontal opening. During the process of the saw rope cutting the bottom joint surface, the horizontal water spray pipe sprays water into the horizontal channel. The water flows along the two horizontal channels in sequence, soaking the two horizontal channels and the saw rope.

8. The green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building according to any one of claims 1 to 3, characterized in that: In the construction step 3), a longitudinal water spray pipe is arranged in the longitudinal opening. During the process of the saw rope cutting the end joint surface, the longitudinal water spray pipe sprays water from top to bottom into the longitudinal channel. The water flows along the longitudinal channel and the horizontal channel in sequence, soaking the longitudinal channel and the horizontal channel.

9. The green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building according to any one of claims 1 to 3, characterized in that: In the construction step 4), one side of the splitting rod forms a fixed side, and the other side of the splitting rod is provided with a plurality of hydraulic plungers that are radially retractable relative to the splitting rod, and the plurality of hydraulic plungers are spaced apart along the axial direction of the splitting rod; In the construction step 4), the splitting rod is hoisted into the splitting hole, with a cracking gap between the bottom of the splitting rod and the bottom of the splitting hole; after the fixed side is abutted against the inner wall of the splitting hole, the multiple hydraulic plungers are radially extended away from the splitting rod until the multiple hydraulic plungers are pressed against the inner wall of the splitting hole, and after the splitting rod remains in a fixed state in the splitting hole, the multiple hydraulic plungers are continued to be driven to radially extend away from the splitting rod until the splitting rod breaks the rock block to form a splitting crack of a set length.

10. The green excavation construction method for preventing dust and reducing noise in a rock foundation pit adjacent to a building as claimed in claim 9, characterized in that: In the construction step 4), the hydraulic plunger has a pressing end for pressing against the rock block, the middle of the pressing end is recessed to form a recessed groove, and both sides of the pressing end form side ends respectively. The hydraulic plunger is provided with a hydraulic impact rod, and the hydraulic impact rod extends into the recessed groove; When the fixed side is fixedly abutted against the inner wall of the splitting hole, and the two side ends are fixedly pressed against the inner wall of the splitting hole, an impact gap is formed between the impact rod and the inner wall of the splitting hole; when the hydraulic plunger continues to extend radially away from the splitting rod, the impact rod synchronously reciprocates and contracts, impacting the inner wall of the splitting hole in an interval shape until the splitting rod breaks the rock block to form a splitting crack of a set length.

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