Split type portable static pressure grouting reinforcement equipment and grouting reinforcement method

Abstract

The invention discloses split type portable static pressure grouting reinforcement equipment and a grouting reinforcement method. The split type portable static pressure grouting reinforcement equipment comprises a penetration part and a grouting part, the penetration part comprises a power device, a penetration device and a counter-force device; the penetration device comprises a hydraulic oil cylinder for driving each penetration rod to press downwards; the power device provides power for the hydraulic oil cylinder; the counter-force device comprises a cross beam for fixing the hydraulic oil cylinder; the cross beam is erected on the ground through a plurality of telescopic supporting legs, and a sleeper is arranged between each supporting leg and the ground; a plurality of ground anchors are arranged on the parts, located on the outer sides of the supporting legs, of the cross beams and are tensioned with the ground through the ground anchors; the grouting part comprises all penetration rods and a grouting pipe arranged at the bottom of the first pressed penetration rod; and after all the grouting pipes are pressed into soil, the upper end of the last pressed penetration rod is sequentially connected with a slurry pump and a stirrer through a grouting pipeline. All devices in the injection part and the grouting part can be detached to achieve the size and weight convenient to carry, split type transportation is achieved, and carrying is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of soil reinforcement, and in particular to split-type portable static pressure grouting reinforcement equipment and a grouting reinforcement method. Background Art

[0002] Static pressure grouting technology is a grouting reinforcement technology commonly used both at home and abroad. It mainly uses pressure and electrochemical principles to inject slurry into rock and soil in the form of filling, compaction, penetration, etc., to replace the water and gas between soil particles and rock cracks, and effectively improve the strength of rock and soil after the slurry solidifies. It is suitable for grouting reinforcement of soft soil, clay soil, silt soil and sandy soil, but not for grouting reinforcement of gravel soil and soil containing many large stones.

[0003] At present, the main method for drilling holes for grouting is the drilling method. This method uses a geological drill or a vibration drill to drill holes. After a grouting pipe is set in the borehole and the hole is sealed with a grouting plug, pressure grouting is performed to achieve the purpose of soil reinforcement.

[0004] Commonly used geological drilling rigs or vibration drilling rigs are often restricted by the site during the grouting hole drilling process due to their large size and heavy weight. The restricted sites are mainly:

[0005] (1) The site with a net height of less than 2.0m or a net width of less than 1.0m cannot be drilled by existing drilling rigs;

[0006] (2) The surface soil of the site is relatively soft. After the steel plate is laid on the surface, although the equipment can enter the site to drill holes, it is inconvenient to move and the grouting points are limited. It is often impossible to reinforce the predetermined reinforcement area, resulting in poor grouting reinforcement effect.

[0007] (3) Under inclined sites, existing geological drills, vibration drills and large integrated grouting equipment often cannot be put into place under inclined sites due to safety reasons.

[0008] At the same time, after the grouting hole is drilled, the geological drill or the vibration drill often needs to add a grout stopper before the grouting can be started. The operation process is cumbersome and the efficiency is not high.

[0009] Although the grouting equipment of the full-hole integrated grouting process does not need a grout stopper, it is only suitable for workplaces with convenient transportation, flat terrain and accessible by car. For sites with complex environments, its use is often limited.

[0010] At present, the grouting equipment used in the grouting hole forming method or the full-hole integrated grouting process is mainly the following:

[0011] Existing solution 1, the utility model patent with authorization announcement number CN209397586 discloses a deep static pressure grouting structure for existing buildings. The grouting pipe is connected to the grouting pump at one end and the grouting device at the other end; the hydraulic static probe is fixed on the bottom plate of the building, the hydraulic static probe is connected to the grouting pipe, and is used to press the grouting device on the grouting pipe to a set depth; the grouting device includes a reamer, a grouting section and a cone tip, the reamer is arranged at the upper and lower ends of the grouting section, and the cone tip is arranged on the outer side of the reamer below, wherein a plurality of grouting holes are arranged at intervals on the grouting section, and the maximum outer diameter of the reamer is greater than the outer diameter of the grouting section. Provide a deep static pressure grouting structure for existing buildings with a small size and simple and convenient operation.

[0012] Existing Scheme 2, the invention patent with authorization announcement number CN115450218 discloses a method for using a static pressure grouting pipe device on the pile side of a vibrating steel pipe pile, comprising an active core pipe grouting device, a static pressure device for static sounding or an anchor static pressure device, and a static sounding test probe; the lower end of the static sounding test probe is provided with the active core pipe grouting device, and two or more of the active core pipe grouting devices and the corresponding static sounding test probes are statically pressed into the required depth outside the vertical projection range of the pipe wall of the steel pipe pile by the static pressure device for static sounding or the anchor static pressure device.

[0013] Existing Solution 3, the invention patent with authorization announcement number CN116044455 discloses a grouting system for directional reinforcement of tunnels, in which the drill rod is set as a hollow rod body, the drill rod is directly used as a grouting pipe, and the drill bit is used as a grouting nozzle. During construction, only one drilling is required, which can greatly improve the construction efficiency and shorten the construction period of tunnel grouting reinforcement; at the same time, by setting a control tube between the drill bit and the drill rod, the slurry outlet position can be changed by adjusting the position of the control tube, thereby realizing switching between different grouting methods to meet the use requirements of different soil layers.

[0014] Existing solution 4, the invention patent with authorization announcement number CN 118110419 A discloses a full-space integrated drilling and injection device, including a walking mechanism, the walking mechanism is provided with a drilling and injection mechanism, a rod changing mechanical arm is provided on one side of the drilling and injection mechanism, the drilling and injection mechanism includes an adjusting mechanism, the adjusting mechanism is connected to the platform, the platform is connected to the support platform through the drilling movement mechanism, the support platform is fixed with a power mechanism, the output shaft of the power mechanism is detachably connected to the drilling tool, the end of the platform is provided with a first drilling tool clamping mechanism and a second drilling tool clamping mechanism, the second drilling tool clamping mechanism is arranged away from the power end head, the second drilling tool clamping mechanism is fixedly connected to the platform, the first drilling tool clamping mechanism is slidably connected to the arc guide rail arranged on the platform, and the first drilling tool clamping mechanism is connected to the rotating driving member of the platform to realize rotation around the axis of the output shaft of the power mechanism.

[0015] Existing solution 5, the invention patent with authorization announcement number CN 221096548U discloses a geotechnical engineering grouting device, including a fixed plate, a handrail, a support column, a fixed plate, a support assembly, a movable assembly, a grouting assembly and a depth adjustment assembly; the handrail is located at the top of the fixed plate, the support column is located at the bottom of the fixed plate, the fixed plate is located at the bottom of the support column, the support assembly is located at the bottom of the fixed plate, the movable assembly is located at the bottom of the support assembly, the grouting assembly is located at the top of the fixed plate, and the depth adjustment assembly is located at the top of the fixed plate.

[0016] Through the analysis of the above five technical solutions, we can know that:

[0017] The problems with the existing solution 1 are: (1) although the equipment is small in size, the components cannot be disassembled, making it inconvenient to move in a restricted area; (2) the grouting device is specially made and the equipment is not very versatile; (3) the equipment is a deep static pressure grouting structure of an existing building and has few application scenarios.

[0018] The problems with the existing solution 2 are: (1) the common static penetration static pressure equipment or anchor static pressure equipment is large in size and inconvenient to move in a restricted area; (2) due to the large size of the equipment, only one grouting point is allowed at each grouting point and its surroundings, and grouting cannot be carried out over a large area at the same time, resulting in low grouting efficiency.

[0019] The problem with the existing solution 3 is that although the grouting process only requires drilling once, which improves the construction efficiency, the directional drilling method is still adopted. Due to the large size of the directional drilling rig and the inconvenience of movement, the directional drilling rig cannot be put into operation in a small and low-clearance site.

[0020] The problem with the existing scheme 4 is that the equipment operating space of the full-space integrated drilling and grouting device is large. Although it can realize multi-angle and multi-functional grouting reinforcement in the whole space, the equipment is heavy and cannot be put into operation in narrow, low-clearance and soft foundation sites.

[0021] The problem with the existing solution 5 is that the geotechnical engineering grouting device is pushed to the grouting site by wheels, and cannot be pushed on soft foundations and inclined sites. The device is heavy and cannot be applied to soft foundations and inclined sites.

[0022] Therefore, the existing grouting reinforcement equipment and construction methods cannot meet the requirements of working in narrow, low-headroom, soft foundations, and sloping sites. How to make the static pressure grouting reinforcement equipment small in size, light in weight, flexible and reliable, and disassemble it into multiple easy-to-carry parts, transport them to the restricted site separately, and then assemble the parts after arriving at the work site, and have low testing cost, flexible and convenient use, and higher grouting reinforcement efficiency when used has become a technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0023] In view of the above-mentioned defects of the prior art, the present invention provides a split portable static pressure grouting reinforcement device and a grouting reinforcement method, the purpose of which is to make the static pressure grouting reinforcement device small in size, light in weight, flexible and reliable, and the entire static pressure grouting reinforcement device can be disassembled into multiple parts that are easy to carry, transported to restricted sites separately, and then assembled after arriving at the work site. It has the advantages of low testing cost, flexible and convenient use, and higher grouting reinforcement efficiency.

[0024] To achieve the above-mentioned purpose, the present invention discloses a split portable static pressure grouting reinforcement device, comprising a penetration part and a grouting part;

[0025] The penetration part includes a power device, a penetration device and a reaction device;

[0026] The power device is a hydraulic motor that provides power to the hydraulic cylinder of the penetration device;

[0027] The penetration device includes a hydraulic cylinder that drives each of the penetration rods downward into the soil;

[0028] The hydraulic motor is connected to the hydraulic cylinder via an oil pipe, and an operating valve group for controlling the operation of the hydraulic cylinder is arranged on the oil pipe;

[0029] The reaction force device includes a crossbeam for fixing the hydraulic cylinder;

[0030] The crossbeam is erected on the ground through a plurality of retractable legs, and a sleeper is provided between each of the legs and the ground;

[0031] The part of the crossbeam located outside the legs is provided with a plurality of ground anchors, and is tightened with the ground through the ground anchors;

[0032] The upper ends of the plurality of ground anchors located on each side of the cross beam are fixed to the channel steels arranged on the corresponding side of the cross beam, and the corresponding side of the cross beam is tightened to the ground by tightening the corresponding channel steels;

[0033] The grouting part includes all the penetration rods and a grouting pipe arranged at the bottom of the first penetration rod pressed in;

[0034] After all the grouting pipes are pressed into the soil and connected in sequence, the upper end of the last penetration rod pressed in is connected to the mud pump and the mixer in sequence through the grouting pipeline.

[0035] Preferably, the operating valve group is arranged on the crossbeam.

[0036] Preferably, each of the penetration rods has a length of 1 m and an outer diameter of 36 mm;

[0037] More than two hydraulic cylinders are arranged on the crossbeam around the motion track of each penetration rod;

[0038] The cylinder body of each hydraulic cylinder is fixed to the crossbeam, and the piston rod reciprocates along the direction of the movement trajectory of each penetration rod, and is fixed to each corresponding penetration rod by a detachable clamp.

[0039] Preferably, the lower end of each of the ground anchors is anchored in a normal sedimentary soil layer.

[0040] More preferably, each of the channel steels is fixed to the crossbeam by a plurality of high-strength bolts;

[0041] The upper end of each of the ground anchors passes through the corresponding channel steel and is pressed against the upper surface of the corresponding channel steel through a gasket.

[0042] The present invention also provides a grouting reinforcement method, which uses the above-mentioned split portable static pressure grouting reinforcement equipment to perform on-site grouting reinforcement, comprising the following steps:

[0043] Step 1: Level the site and move the equipment. Specifically, first repair and level the work site, then move the operating valve group, hydraulic cylinder, oil pipe, beam, all legs, all sleepers, all anchors, all gaskets, all channel steels, all high-strength bolts, grouting pipes and penetration rods to the designed points in a narrow, low-headroom, soft foundation, and inclined site; place the hydraulic motor, mixer, and mud pump in a relatively suitable site.

[0044] Step 2, assembling the penetration part and the grouting part, and leveling the equipment; specifically, assembling the operating valve group, the hydraulic cylinder, the oil pipe, the beam, all the legs, all the sleepers, all the anchors, all the gaskets, all the channel steels, all the high-strength bolts, the grouting pipe and the penetration rod in sequence;

[0045] and assembling the hydraulic motor and the operating valve group together through the oil pipe;

[0046] The operating valve group and the hydraulic cylinder are arranged on the crossbeam;

[0047] placing all the legs of the beam on corresponding sleepers;

[0048] All the ground anchors are connected and fixed to the corresponding channel steels through the corresponding gaskets;

[0049] Each of the channel steels is connected and fixed to the crossbeam via the corresponding high-strength bolts;

[0050] Step 3, penetrate all the penetration rods and grouting pipes, and connect them to the reinforcement depth in sequence; connect the lower end of the first penetration rod to the grouting pipe, and slowly penetrate it into the underground soil layer through the penetration device, and then continue to penetrate the next penetration rod until it penetrates to the designed reinforcement depth;

[0051] Step 4, stirring the mud and pouring the mud; connecting the topmost penetration rod to the mud pipe, pouring the grouting materials including cement, admixture and water into the mixer according to the designed proportion and fully stirring them, and then using the mud pump to pump the reinforcement slurry through the mud pipe, all the penetration rods and the grouting pipe to the planned reinforcement position;

[0052] Step 5: After reinforcement is completed, pull out all the penetration rods and the grouting pipes; when the amount of mud injected or the loaded grouting pressure reaches the design value, turn off the mud pump, stop grouting, pull out all the penetration rods from the penetration part in turn, and finally pull out the grouting pipe to complete a grouting point.

[0053] Preferably, the operating valve group, the hydraulic cylinder, the oil pipe, the crossbeam, all the legs, all the sleepers, all the anchors, all the gaskets, all the channel steels, all the high-strength bolts, the grouting pipe and the penetration rod are all transported by a gasoline-electric flatbed truck;

[0054] When site conditions do not allow, manual handling is used.

[0055] Preferably, in step 2, during the process of placing each of the ground anchors, if there is a concrete floor in the site, a portable backpack drill is required to drill holes;

[0056] After the operating valve group, the hydraulic cylinder, the oil pipe, the crossbeam, all the legs, all the sleepers, all the anchors, all the gaskets, all the channel steels, all the high-strength bolts, the grouting pipe and the penetration rod are assembled, leveling is required to avoid tilting and affecting the reinforcement effect;

[0057] If it is a sloped site, sleepers matching the sloped site must be prepared in advance.

[0058] Preferably, if the same grouting point has multiple reinforcement depths, the corresponding number of penetration rods are pulled out or added, and when the grouting pipe reaches the next designed reinforcement depth, the mud pump is turned on again to start the grouting reinforcement operation.

[0059] Preferably, after completing one grouting point, move to the next designed point and repeat steps 1 to 5 to complete the reinforcement of all points.

[0060] Beneficial effects of the present invention:

[0061] The devices in the penetration part and the grouting part of the present invention can be disassembled to a volume and weight that are convenient for carrying, and can be transported in a split type, which makes it more convenient to carry to a restricted site and then assemble and use them in sequence.

[0062] The present invention is compact and flexible during disassembly and transportation, simple and convenient during assembly and use, provides a large reaction force, can reinforce a maximum depth of 70m, and has a high grouting reinforcement efficiency.

[0063] The invention is suitable for the reinforcement of foundation soils such as artificial fill, silty soil, clay soil, silt soil and sandy soil, the reinforcement of the pile ends of steel pipe piles and the reinforcement engineering of the repair of existing buildings.

[0064] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 A schematic structural diagram of an embodiment of the present invention is shown.

[0066] Figure 2 A schematic diagram showing the structure of an embodiment of the present invention disposed on a sloping site is shown.

[0067] Figure 3 A cross-sectional structural schematic diagram of an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0068] Example

[0069] like Figures 1 to 3 As shown, the split portable static pressure grouting reinforcement equipment includes a penetration part and a grouting part;

[0070] The penetration part includes a power device, a penetration device and a reaction device;

[0071] The power device is a hydraulic motor 1 that provides power to the hydraulic cylinder 3 of the penetration device;

[0072] The penetration device includes a hydraulic cylinder 3 that drives each penetration rod 15 downward into the soil;

[0073] The hydraulic motor 1 is connected to the hydraulic cylinder 3 through an oil pipe 4, and an operating valve group 2 for controlling the operation of the hydraulic cylinder 3 is arranged on the oil pipe 4;

[0074] The reaction device includes a crossbeam 5 that fixes the hydraulic cylinder 3;

[0075] The crossbeam 5 is erected on the ground through a plurality of retractable legs 6, and a sleeper 7 is provided between each leg 6 and the ground;

[0076] The portion of the crossbeam 5 located outside the legs 6 is provided with a plurality of ground anchors 8, and is tightened to the ground through the ground anchors 8;

[0077] The upper ends of the multiple ground anchors 8 located on each side of the cross beam 5 are fixed to the channel steels 10 arranged on the corresponding side of the cross beam 5, and the corresponding side of the cross beam 5 is tightened to the ground by tightening the corresponding channel steels 10;

[0078] The grouting part includes all penetration rods 15 and a grouting pipe 16 arranged at the bottom of the first penetration rod 15 pressed in;

[0079] After all the grouting pipes 16 are pressed into the soil and connected in sequence, the upper end of the last penetration rod 15 pressed in is connected to the mud pump 13 and the mixer 12 in sequence through the grouting pipeline 14 .

[0080] The present invention adopts a set of split portable static pressure grouting reinforcement equipment used in narrow, low-headroom, soft foundation and inclined sites. The reinforcement equipment mainly includes a penetration part and a grouting part.

[0081] In practical applications, by controlling the reciprocating motion of the piston of the hydraulic cylinder 3, the penetration rods 15 with the grouting pipes 16 at the bottom are pressed into the soil one by one, providing the penetration rods 15 with downward power to overcome the resistance of the soil layer;

[0082] The crossbeam 5 is erected on the ground through a plurality of retractable legs 6 and corresponding sleepers 7, and can adapt to different ground environments by adjusting the length of each leg 6 and the shape of the corresponding sleepers 7;

[0083] The crossbeam 5 provides a supporting force through a plurality of legs 6 and an anchoring force provided by a plurality of anchors 8 to provide a reaction force for the entire penetration device, so as to balance the reaction of the penetration resistance to the penetration device, so that the penetration rod 15 can penetrate to a predetermined depth when working.

[0084] The grouting materials including cement slurry, admixture and water are evenly mixed by the mixer 12, flow into the grouting pipe 16 through the penetration rod 15 along the grouting pipe 14 under the pressure of the mud pump 13, and finally diffuse into the soil layer to be reinforced through the grouting pipe 16. The penetration rod 15 is compatible with most of the existing grouting pipes of various types, thereby completing the designed grouting reinforcement work.

[0085] In some embodiments, the operating valve group 2 is arranged on the crossbeam 5 .

[0086] In the penetration part and the grouting part, each penetration rod 15 has a length of 1m and an outer diameter of 36mm;

[0087] The cross beam 5 surrounds the movement track of each penetration rod 15 and is provided with two or more hydraulic cylinders 3;

[0088] The cylinder body of each hydraulic cylinder 3 is fixed to the crossbeam 5, and the piston rod reciprocates along the direction of the movement trajectory of each penetration rod 15, and is fixed to each corresponding penetration rod 15 by a detachable clamp.

[0089] The lower end of each ground anchor 8 is anchored in the normal sedimentary soil layer;

[0090] The upper ends of the multiple ground anchors 8 located on each side of the cross beam 5 are fixed to the channel steels 10 arranged on the corresponding side of the cross beam 5, and the corresponding side of the cross beam 5 is tightened to the ground by tightening the corresponding channel steels 10.

[0091] Each channel steel 10 is vertically fixed to the crossbeam 5 by a plurality of high-strength bolts 11;

[0092] The upper end of each anchor 8 passes through the corresponding channel steel 10 and is pressed against the upper surface of the corresponding channel steel 10 through the gasket 9 .

[0093] The present invention also provides a grouting reinforcement method, which uses the above-mentioned split portable static pressure grouting reinforcement equipment to perform on-site grouting reinforcement, and comprises the following steps:

[0094] Step 1: Level the site and move the equipment; specifically: first repair and level the work site, then move the operating valve group 2, hydraulic cylinder 3, oil pipe 4, beam 5, all legs 6, all sleepers 7, all anchors 8, all gaskets 9, all channel steels 10, all high-strength bolts 11, grouting pipes 16 and penetration rods 15 to the designed points in a narrow, low-headroom, soft foundation, and inclined site; the hydraulic motor 1, mixer 12, and mud pump 13 are placed in a relatively suitable site;

[0095] Step 2, assemble the penetration part and the grouting part, and level the equipment; specifically, assemble the operating valve group 2, the hydraulic cylinder 3, the oil pipe 4, the crossbeam 5, all the legs 6, all the sleepers 7, all the anchors 8, all the gaskets 9, all the channel steels 10, all the high-strength bolts 11, the grouting pipe 16 and the penetration rod 15 in sequence;

[0096] The hydraulic motor 1 is assembled with the operating valve group 2 through the oil pipe 4;

[0097] The operating valve group 2 and the hydraulic cylinder 3 are arranged on the crossbeam 5;

[0098] Place all legs 6 of the crossbeam 5 on the corresponding sleepers 7;

[0099] All ground anchors 8 are connected and fixed to corresponding channel steels 10 through corresponding gaskets 9;

[0100] Each channel steel 10 is connected and fixed to the cross beam 5 by corresponding high-strength bolts 11;

[0101] Step 3: penetrate all penetration rods 15 and grouting pipes 16 and connect them to the reinforcement depth in sequence; connect the lower end of the first penetration rod 15 to the grouting pipe 16, and slowly penetrate it into the underground soil layer through the penetration device, and then continue to penetrate the next penetration rod 15 until it reaches the designed reinforcement depth;

[0102] Step 4, stir the mud and pour the mud; connect the topmost penetration rod 15 to the mud pipe 14, pour the grouting materials including cement, admixture and water into the mixer 12 according to the designed proportion and stir them evenly, and then use the mud pump 13 to pump the reinforcement slurry through the mud pipe 14, all the penetration rods 15 and the grouting pipe 16 to the planned reinforcement position;

[0103] Step 5: After reinforcement is completed, pull out all penetration rods 15 and grouting pipes 16; when the amount of mud injected or the loaded grouting pressure reaches the design value, turn off the mud pump 13, stop grouting, pull out all penetration rods 15 from the penetration part in turn, and finally pull out the grouting pipe 16 to complete a grouting point.

[0104] In actual applications, repairing and leveling the work site can avoid the presence of large rocks or uneven slopes that affect equipment transportation.

[0105] In some embodiments, the operating valve group 2, the hydraulic cylinder 3, the oil pipe 4, the crossbeam 5, all the legs 6, all the sleepers 7, all the anchors 8, all the gaskets 9, all the channel steels 10, all the high-strength bolts 11, the grouting pipe 16 and the penetration rod 15 are transported by a gasoline-electric flatbed truck;

[0106] When site conditions do not allow, manual handling is used.

[0107] In some embodiments, in step 2, during the process of placing each ground anchor 8, if there is a concrete floor in the site, a portable backpack drill is required to drill a hole;

[0108] After the operating valve group 2, hydraulic cylinder 3, oil pipe 4, crossbeam 5, all legs 6, all sleepers 7, all anchors 8, all gaskets 9, all channel steels 10, all high-strength bolts 11, grouting pipe 16 and penetration rod 15 are assembled, leveling is required to avoid tilting and affecting the reinforcement effect;

[0109] If it is a sloped site, sleepers 17 matching the sloped site need to be prepared in advance.

[0110] In some embodiments, if the same grouting point has multiple reinforcement depths, a corresponding number of penetration rods 15 are pulled out or added, and when the grouting pipe 16 reaches the next designed reinforcement depth, the mud pump 13 is turned on again to start the grouting reinforcement operation.

[0111] In some embodiments, after completing a grouting point, move to the next designed point and repeat steps 1 to 5 to complete the reinforcement of all points.

[0112] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. Split portable static pressure grouting reinforcement equipment; characterized in that, Including the penetration part and the grouting part; The penetration part includes a power device, a penetration device and a reaction device; The power device is a hydraulic motor (1) that provides power to the hydraulic cylinder (3) of the penetration device; The penetration device comprises a hydraulic cylinder (3) for driving each penetration rod (15) downward into the soil; The hydraulic motor (1) is connected to the hydraulic cylinder (3) via an oil pipe (4), and an operating valve group (2) for controlling the operation of the hydraulic cylinder (3) is provided on the oil pipe (4); The reaction force device comprises a crossbeam (5) for fixing the hydraulic cylinder (3); The crossbeam (5) is erected on the ground via a plurality of retractable legs (6), and a sleeper (7) is provided between each leg (6) and the ground; The portion of the crossbeam (5) located outside the supporting legs (6) is provided with a plurality of ground anchors (8) and is tightened to the ground through the ground anchors (8); The upper ends of the plurality of ground anchors (8) located on each side of the cross beam (5) are fixed to the channel steel (10) arranged on the corresponding side of the cross beam (5), and the corresponding side of the cross beam (5) is tightened to the ground by tightening the corresponding channel steel (10); The grouting part includes all the penetration rods (15) and a grouting pipe (16) arranged at the bottom of the first penetration rod (15) pressed in; After all the grouting pipes (16) are pressed into the soil and connected in sequence, the upper end of the last penetration rod (15) pressed in is connected to the mud pump (13) and the mixer (12) in sequence through the grouting pipe (14).

2. The split portable static pressure grouting reinforcement equipment according to claim 1 is characterized in that: The operating valve group (2) is arranged on the crossbeam (5).

3. The split portable static pressure grouting reinforcement equipment according to claim 1 is characterized in that: Each of the penetration rods (15) has a length of 1 m and an outer diameter of 36 mm; More than two hydraulic cylinders (3) are arranged on the crossbeam (5) around the movement track of each penetration rod (15); The cylinder body of each hydraulic cylinder (3) is fixed to the crossbeam (5), and the piston rod reciprocates along the direction of the movement trajectory of each penetration rod (15) and is fixed to each corresponding penetration rod (15) by a detachable clamp.

4. The split portable static pressure grouting reinforcement equipment according to claim 1 is characterized in that: The lower end of each of the ground anchors (8) is anchored in the normal sedimentary soil layer.

5. The split portable static pressure grouting reinforcement equipment according to claim 4 is characterized in that: Each of the channel steels (10) is fixed to the crossbeam (5) by a plurality of high-strength bolts (11); The upper end of each of the ground anchors (8) passes through the corresponding channel steel (10) and is pressed against the upper surface of the corresponding channel steel (10) through a gasket (9).

6. Grouting reinforcement method, characterized in that: Using the split portable static pressure grouting reinforcement equipment as described in any one of claims 1 to 5 to perform on-site grouting reinforcement includes the following steps: Step 1, leveling the site and moving the equipment; specifically: first repair and level the work site, then move the operating valve group (2), hydraulic cylinder (3), oil pipe (4), beam (5), all legs (6), all sleepers (7), all anchors (8), all gaskets (9), all channel steels (10), all high-strength bolts (11), grouting pipes (16) and penetration rods (15) to the designed point in a narrow, low-headroom, soft foundation, and inclined site; the hydraulic motor (1), mixer (12), and mud pump (13) are placed in a relatively suitable site; Step 2, assembling the penetration part and the grouting part, and leveling the equipment; specifically, assembling the operating valve group (2), the hydraulic cylinder (3), the oil pipe (4), the crossbeam (5), all the legs (6), all the sleepers (7), all the anchors (8), all the gaskets (9), all the channel steels (10), all the high-strength bolts (11), the grouting pipe (16) and the penetration rod (15) in sequence; and assembling the hydraulic motor (1) and the operating valve group (2) together through the oil pipe (4); The operating valve group (2) and the hydraulic cylinder (3) are arranged on the crossbeam (5); Placing all the legs (6) of the crossbeam (5) on corresponding sleepers (7); All the ground anchors (8) are connected and fixed to the corresponding channel steels (10) via the corresponding gaskets (9); Each of the channel steels (10) is connected and fixed to the crossbeam (5) via the corresponding high-strength bolts (11); Step 3, penetrate all the penetration rods (15) and the grouting pipes (16), and connect them to the reinforcement depth in sequence; connect the lower end of the first penetration rod (15) to the grouting pipe (16), and slowly penetrate it into the underground soil layer through the penetration device, and then continue to penetrate the next penetration rod (15) until it penetrates to the designed reinforcement depth; Step 4, stirring the mud and pouring the mud; connecting the topmost penetration rod (15) to the mud pipe (14), pouring the grouting materials including cement, admixture and water into the mixer (12) according to the designed proportion and stirring them thoroughly, and then using the mud pump (13) to pump the reinforcement slurry through the mud pipe (14), all the penetration rods (15) and the grouting pipe (16) to the planned reinforcement position; Step 5: After the reinforcement is completed, all the penetration rods (15) and the grouting pipes (16) are pulled out; when the amount of mud injected or the loaded grouting pressure reaches the designed value, the mud pump (13) is turned off, the grouting is stopped, and all the penetration rods (15) are pulled out in sequence from the penetration part, and finally the grouting pipe (16) is pulled out to complete a grouting point.

7. The grouting reinforcement method according to claim 6, characterized in that: The operating valve group (2), the hydraulic cylinder (3), the oil pipe (4), the crossbeam (5), all the legs (6), all the sleepers (7), all the anchors (8), all the gaskets (9), all the channel steels (10), all the high-strength bolts (11), the grouting pipe (16) and the penetration rod (15) are all transported by a gasoline-electric flatbed truck; When site conditions do not allow, manual handling is used.

8. The grouting reinforcement method according to claim 6, characterized in that: In step 2, during the process of placing each of the ground anchors (8), if there is a concrete floor in the site, a portable backpack drill is required to drill holes; After the operating valve group (2), the hydraulic cylinder (3), the oil pipe (4), the crossbeam (5), all the legs (6), all the sleepers (7), all the anchors (8), all the gaskets (9), all the channel steels (10), all the high-strength bolts (11), the grouting pipe (16) and the penetration rod (15) are assembled, leveling is required to avoid tilting that affects the reinforcement effect; If it is a sloped site, then it is necessary to prepare in advance the sleepers (17) that match the sloped site.

9. The grouting reinforcement method according to claim 6, characterized in that: If there are multiple reinforcement depths for the same grouting point, the corresponding number of penetration rods (15) are pulled out or added, and when the grouting pipe (16) reaches the next designed reinforcement depth, the mud pump (13) is turned on again to start the grouting reinforcement operation.

10. The grouting reinforcement method according to claim 6, characterized in that: After completing one grouting point, move to the next designed point and repeat steps 1 to 5 to complete the reinforcement of all points.

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