Vibration high-strength composite foundation construction process

Abstract

The invention relates to a vibration high-strength composite foundation construction technology, and belongs to the field of engineering construction. According to the method, hole forming is conducted through vibration construction, then uplift pile forming is conducted through grouting or powder spraying, vibration impact construction, vibration tube sinking method construction or cross wing resonance method construction can be adopted in the vibration construction, a vibration impact device is adopted in the vibration impact construction, a vibration hammer and a pile tube are adopted in the vibration tube sinking method construction, and a vibration hammer and a cross steel plate are adopted in the cross wing resonance method construction. The vibration high-strength composite foundation does not have the pile breaking phenomenon, zero-overlapping construction and liquefaction resistance can be achieved if the vibration high-strength composite foundation is broken, gravel pile water permeability is compatible, the bearing capacity is remarkably improved, the construction cost is low, and operation is easy. When the underground water quantity is sufficient, a powder spraying process is adopted; when underground water is deficient, a grouting process is adopted; and the compatibility is very good.

Description

Technical Field

[0001] The invention relates to the technical field of engineering construction, in particular to a vibration high-strength composite foundation construction process. Background Art

[0002] Traditional powder injection generally adopts the mixing pile method, such as the "construction process and equipment of powder injection pile" disclosed in the publication (announcement) number: CN113502811A. The existing powder injection process is generally as follows:

[0003] Powder spraying mixing pile: start the air compressor to deliver air, the drill rig rotates forward and drills vertically, and stops drilling when the double-screw mixing head reaches the designed pile bottom elevation. The drill bit rotates in place and it is strictly forbidden to stop drilling. The drill rig rotates in the reverse direction, and the ash feeder is started to deliver ash (powder). After the powder spraying medium (such as cement) is delivered to the ash spraying port, the drill bit is lifted. According to the ash spraying amount displayed by the electronic weighing device, the speed regulating motor is adjusted, so that powder spraying, stirring and lifting are carried out at the same time.

[0004] When the drill bit is lifted to 0.5m above the design elevation, the ash delivery is stopped, the drill bit rotates forward, and re-mixing and re-spraying are performed. The re-spraying depth and re-mixing depth should be in accordance with the design requirements of the drawings. When the drill bit is lifted to 30-50cm above the ground, the powder spraying medium is stopped into the hole, and the pile formation is completed.

[0005] Defects that are easy to occur in the construction of powder injection mixing piles:

[0006] 1. During the pile construction process, if the slurry is stopped for some reason, the piles must be overlapped when the construction continues, and the length of the piles must not be less than 0.5m. If the shutdown exceeds 3 hours, the slurry delivery pipeline should be dismantled, the pipeline should be cleaned and blown, and a pile should be added next to the original pile position.

[0007] 2. During the pile forming process, when powder spraying is interrupted, the overlapping length of the second powder spraying of the pile shall not be less than 1m.

[0008] Based on this, the present invention is proposed. Summary of the invention

[0009] In view of the shortcomings of the prior art, the present invention provides a vibration high-strength composite foundation construction process, and its technical solution is as follows:

[0010] The vibration high-strength composite foundation construction process includes the following steps:

[0011] Step 1: Select the stake location and set the ground zero point;

[0012] Step 2: Hole making

[0013] When vibro-impact construction is adopted, a hole is first made by a vibrator, the hole is completed, and the hole is cleaned to obtain a vibro-impacted hole;

[0014] When the vibration pipe sinking method is used for construction, the construction tools are a vibration hammer and a pile pipe; there is no need to clean the hole after drilling;

[0015] When the cross-wing resonance method is used for construction, the construction tools are a vibrating hammer and a cross steel plate. First, holes are made by using the vibrating hammer and the cross steel plate;

[0016] Step 3: Fill

[0017] The filling is carried out by grouting technology; the grouting medium is a main material without filler or a main material with filler;

[0018] When vibratory construction is adopted, a grouting pump is used to deliver the grouting medium into the vibratory hole. Before grouting, the water pump is turned off and the vibrator is used to vibrate and compact the grouting medium. Grouting is carried out in a segmented upward manner until the set height is reached.

[0019] or,

[0020] When the vibration pipe sinking method is used for construction, the grouting medium is sent into the pile pipe by a grouting pump, and the vibrating hammer applies vibration to the pile pipe to compact the grouting medium.

[0021] or,

[0022] When the cross-wing resonance method is used for construction, a grouting pump is used to deliver the grouting medium into the center hole of the cross steel plate, and grouting is performed in sections until the set height is reached;

[0023] or,

[0024] The filling is carried out by powder spraying technology. In the powder spraying construction, the powder spraying medium is divided into powder spraying medium containing crushed stone and powder spraying medium without crushed stone. If it is powder spraying medium containing crushed stone, first add crushed stone into the vibrating hole / pile pipe / center hole of the cross steel plate, vibrate and compact it, and then spray powder. With the lifting and reverse insertion of the vibrator / pile pipe / cross steel plate, spray powder at a uniform speed until the set height is reached and the powder spraying is stopped.

[0025] As a further solution of the present invention, when vibratory construction is used for hole making, the water pump and the air compressor are started first. When water and air are discharged from the bottom of the grouting pipe on both sides of the vibrator, the vibrator is started to make a hole. The hole making speed is 1 to 2 m / min until the hole is made to the designed depth and the hole making is completed. After the hole making is completed, the hole is cleaned. When cleaning the hole, the water source is turned off and the air is kept out. Finally, a vibratory hole is obtained.

[0026] As a further solution of the present invention, when the vibration pipe sinking method is used for construction, the pile head is first installed at the designed pile position, the pile pipe is placed on the pile head, the vibration hammer is in place, the pile pipe is kept vertically downward, and the hammer weight and the pile pipe deadweight are used to slowly press statically for 1 to 2 meters before starting the vibration hammer to vibrate and sink; during the vibration sinking process, the verticality of the pile pipe is adjusted in real time, and the verticality of the pile pipe should be ≤1.5%; the vibration is retained for 30 seconds every time the pile pipe sinks 0.5 meters until the vibration hammer sinks the pile pipe to the designed depth and the vibration hammer stops vibrating.

[0027] As a further scheme of the present invention, when the cross-wing resonance method is used for construction, a hole is first made by a vibrating hammer and a cross steel plate; during the hole making process, the frequency of the vibrating hammer is adjusted, and the cross steel plate vibrates downward. When vibrating and sinking, attention is paid to the verticality of the cross steel plate. The sinking speed of the cross steel plate is controlled within 1.2m / min. When the designed depth is reached, it is lifted while vibrating until it reaches the ground, and the lifting speed is controlled within 2.5m / min.

[0028] As a further solution of the present invention, the main material without filler is one or more of original soil, cement, and cement slurry; the main material with filler includes reinforcing material, anti-corrosion and rust inhibitor, coagulant, and cement, the reinforcing material is one or more of aggregate and fiber, and the aggregate includes crushed stone and sand.

[0029] As a further scheme of the present invention, when vibratory construction is used for grouting, a grouting pump is used to deliver the grouting medium into the vibratory hole, the water pump is turned off before grouting, and the vibrator is used to vibrate to compact the grouting medium; grouting is performed in a segmented upward manner, such as first injecting a certain amount of grouting medium into the vibratory hole, then lifting the vibrator 0.33m and then grouting, then lifting the vibrator again, and then grouting again, until the set height is reached.

[0030] As a further solution of the present invention, when the vibration pipe sinking method is used for construction, a grouting pump is used to deliver the grouting medium into the pile pipe, and a vibrating hammer applies vibration to the pile pipe to compact the grouting medium; the height of the grouting medium in the pile pipe needs to reach a certain height before the pipe can be pulled out, and the pipe is vibrated for about 1 minute before pulling out, and then the pipe is pulled out while vibrating. For every 0.5 to 1m of lifting, the pile pipe should be reversed by about 40cm and vibrated for 30 to 60s, and this is repeated until the entire pile pipe is pulled out, and the pipe pulling speed is controlled to be 1.2 to 1.5m / min; the above grouting and pipe pulling steps are repeated until the pile pipe is pulled out of the ground.

[0031] As a further solution of the present invention, when the cross-wing resonance method is used for construction, a grouting pump is used to deliver the grouting medium into the center hole of the cross steel plate, and grouting is performed in a segmented upward manner. For example, a certain amount of grouting medium is first injected, and then the cross steel plate is lifted a certain distance and then grouting is performed, and then the cross steel plate is lifted again and grouting is performed again until the set height is reached.

[0032] As a further solution of the present invention, a powder spraying system is used for powder spraying, and the powder spraying system includes an air compressor, a soot blowing tank, a soot storage tank, an air storage tank, a soot blower, and a powder spraying pipeline;

[0033] If a vibrator is used for construction, the powder spraying pipe is connected to the grouting pipe of the vibrator;

[0034] If pile pipe is used for construction, the powder spraying pipe goes deep into the pile pipe;

[0035] If a cross steel plate is used for construction, the powder spraying pipe is connected to the center hole of the cross steel plate.

[0036] As a further solution of the present invention, when using a vibrator for construction, if during powder spraying, a powder spraying process is used for filling; for a powder spraying medium containing crushed stone, crushed stone is first added to the vibrating hole, and when there is a densification current display, powder spraying is performed;

[0037] The no-load current of the vibrator is 45-120A, the difference between the encrypted current and the no-load current is 30-100A, and the powder spraying amount is 160±20kg per linear meter.

[0038] Compared with the prior art, the beneficial effects of the present invention are:

[0039] The construction technology of the present invention can be divided into powder spraying and grouting according to the groundwater content.

[0040] The construction machines and tools can be: vibrator, vibration hammer (pile pipe, cross steel plate), which have strong versatility.

[0041] The main materials of composite foundation are divided into main materials without fillers and main materials with fillers to meet various process requirements.

[0042] The vibration high-strength composite foundation of the present invention does not have the phenomenon of broken piles. If it is interrupted, zero overlap construction can be achieved. It is liquefied resistant and compatible with gravel piles. The water permeability and bearing capacity are significantly improved, the construction cost is low, and the operation is simple. When the groundwater is sufficient, the powder spraying process is adopted; when the groundwater is scarce, the grouting process is adopted; the compatibility is very good. DETAILED DESCRIPTION

[0043] The present invention is described in detail below in conjunction with specific embodiments. The embodiments described below are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0044] Example 1

[0045] Step 1: Select the stake location and set the ground zero point;

[0046] Step 2: Make a hole.

[0047] In some embodiments, vibratory construction is adopted, which first uses a vibrator to make a hole. Generally, the water pump and air compressor are started first. When water and air are discharged from the bottom of the grouting pipe on both sides of the vibrator, the vibrator is started to make a hole. The hole making speed is 1 to 2 m / min until the hole is made to the designed depth and the hole making is completed. After the hole making is completed, the hole is cleaned. When cleaning the hole, the water source is turned off and the air is kept out; finally, a vibratory hole is obtained.

[0048] In other embodiments, a vibrating pipe sinking method is used for construction, and the construction tools are a vibrating hammer and a pile pipe. The specific steps are as follows:

[0049] First, install the pile head at the designed pile position, place the pile pipe on the pile head, put the vibrating hammer in place, keep the pile pipe vertical downward, use the hammer weight and the pile pipe weight to slowly press statically for 1 to 2 meters, and then start the vibrating hammer to vibrate and sink. During the vibration sinking process, adjust the verticality of the pile pipe in real time, and the verticality of the pile pipe should be ≤1.5%; keep the vibration for 30 seconds every 0.5m of sinking, until the vibrating hammer sinks the pile pipe to the designed depth, and the vibrating hammer stops vibrating.

[0050] In other embodiments, the cross-wing resonance method is used for construction, and the construction tools are a vibrating hammer and a cross steel plate. First, a hole is made by using a vibrating hammer and a cross steel plate. During the hole making process, the frequency of the vibrating hammer is adjusted (consistent with the natural frequency of the reinforced soil layer previously measured), and the cross steel plate vibrates downward. When vibrating and sinking, pay attention to the verticality of the cross steel plate. The sinking speed of the cross steel plate is controlled within 1.2m / min. When the designed depth is reached, it is lifted while vibrating until it reaches the ground, and the lifting speed is controlled within 2.5m / min.

[0051] The vibrating pipe sinking method is adopted for construction, and there is no need to clean the hole.

[0052] Step 3: Powder spray

[0053] Regardless of whether the construction machine is a vibrator, a vibrating hammer and a pile pipe, or a vibrating hammer and a cross steel plate, the principle of powder spraying is the same; the powder spraying medium at this time is a main material without filler or a main material with filler; the main material without filler is one or more of original soil and cement; the main material with filler includes reinforcing materials, anticorrosive and rust inhibitors, coagulants, and cement, and the reinforcing materials are one or more of aggregates and fibers, and the aggregates include crushed stone and sand. Among them, in powder spraying construction, the powder spraying medium is distinguished according to the powder spraying medium containing crushed stone and the powder spraying medium not containing crushed stone; if it is a powder spraying medium containing crushed stone, first add crushed stone to the vibrating hole / pile pipe / center hole of the cross steel plate, vibrate and compact it, and then spray powder. As the vibrator / pile pipe / cross steel plate is lifted and reversed, powder spray is carried out at a uniform speed until the set height is reached and the powder spraying is stopped.

[0054] In other embodiments, the powder spraying medium ratio is shown in Table 1:

[0055] Table 1 Powder spraying medium mix ratio

[0056] Cement (kg) Fly ash(kg) Building sand (kg) Crushed stone(kg) Water (kg) C10 strength ratio 1 250 100 770 1125 180 C10 strength ratio 2 280 / / 1543 122 C20 strength ratio 1 330 100 640 1235 185 C20 strength ratio 2 420 / / 2314 180 C5 strength ratio 145 / / 1543 90

[0057] Among them, the cement model is 42.5 silicate cement, and fly ash is the coagulant.

[0058] The powder spraying system is used for powder spraying. The powder spraying system generally includes an air compressor, a soot blowing tank, a soot storage tank, an air storage tank, a soot blower, and a powder spraying pipeline. If it is a vibrator, the powder spraying pipeline is connected to the grouting pipe of the vibrator. If it is a pile pipe, the powder spraying pipeline goes deep into the pile pipe. If it is a cross steel plate, the powder spraying pipeline is connected to the center hole of the cross steel plate.

[0059] If a vibrator is used for powder spraying, for powder spraying media containing crushed stone, first add crushed stone into the vibrating hole, and then carry out powder spraying when an encrypted current is displayed.

[0060] The parameters of vibroflotation on-site construction are:

[0061] The theoretical pile diameter is 800-1200mm, the no-load current of the vibrator is 45-120A, the density current is increased by 30-100A (relative to the no-load current), the exciting force is 100KN-500KN, the water pressure during hole making is 0-2MPa, the air compressor pressure is 0.2-1.6MPa, the water pressure during density is 0-1MPa, and the powder spraying volume is 160±20kg per linear meter. If the powder spraying medium is a filler main material, the amount of reinforcing material used during construction is directly proportional to the powder spraying volume; if the powder spraying medium is a filler-free main material, the settlement during construction is directly proportional to the powder spraying volume.

[0062] The vibrator is used for powder spraying, and the soil particles are rearranged and compacted by vibration, which can achieve drainage consolidation and improve the bearing capacity of the soil composite foundation; while the mixing powder spraying does not compact and has poor density. The present invention belongs to environmentally friendly construction, and the powder or slurry is transported on site through a closed pipeline without dripping or leakage; the vibration can be dry-constructed without mud discharge; the whole construction process is digitally monitored and controlled.

[0063] Example 2

[0064] The only difference between this example and Example 1 is that step 3 is grouting instead of powder spraying.

[0065] In some embodiments, vibro-impacting construction is adopted, and the grouting medium at this time is a main material without filler or a main material with filler; the main material without filler is one or more of original soil, cement, and cement slurry; the main material with filler includes reinforcing material, anticorrosion and rust inhibitor, coagulant, and cement, and the reinforcing material is one or more of aggregate and fiber, and the aggregate includes crushed stone and sand. A grouting pump is used to deliver the grouting medium into the vibro-impacting hole, and the water pump is turned off before grouting. The vibro-impactor performs vibratory compaction to compact the grouting medium; grouting is performed in a segmented lifting manner, such as first injecting a certain amount of grouting medium into the vibro-impacting hole, then lifting the vibro-impactor 0.33m and then grouting, then lifting the vibro-impactor again, and then grouting again until the set height is reached.

[0066] In some embodiments, the grouting medium has the following composition:

[0067] According to the requirements, the concrete strength of plain concrete structures should not be lower than C15 grade, and the reinforced concrete strength should not be lower than C20 grade.

[0068] Note: C15 concrete mix ratio per cubic meter (kg): 256kg cement, 185kg water, 750kg sand, 1172kg crushed stone. Sand is medium sand with a fineness modulus of 2.3-3.0; the particle size of crushed stone is 5-40mm.

[0069] C20 concrete mix ratio per cubic meter dosage (kg): 335kg cement, 185kg water, 640kg sand, 1245kg crushed stone. Sand is medium sand with a fineness modulus of 2.3-3.0; the particle size of crushed stone is 5-40mm.

[0070] C25 concrete mix ratio per cubic meter (kg): 390kg cement, 185kg water, 566kg sand, 1244kg crushed stone. The sand is medium sand with a fineness modulus of 2.3-3.0; the particle size of the crushed stone is 5-40mm.

[0071] In other embodiments, the vibrating pipe sinking method is used for construction, and the construction tools are a vibrating hammer and a pile pipe. The grouting medium at this time is the same as that in the vibratory construction. A grouting pump is used to send the grouting medium into the pile pipe, and the vibrating hammer applies vibration to the pile pipe to squeeze the grouting medium; the height of the grouting medium in the pile pipe needs to reach a certain height (such as greater than 1 / 3 of the pile pipe length) before the pipe can be pulled out. Before pulling out the pipe, vibrate for about 1 minute, and then pull out the pipe while vibrating. For every 0.5-1m increase, the pile pipe should be reversed by about 40cm, and vibration should be left for 30-60s. This is repeated until the pile pipe is fully pulled out, and the pulling speed is controlled to be 1.2-1.5m / min. Repeat the above grouting and pulling out steps until the pile pipe is pulled out of the ground.

[0072] In other embodiments, the cross-wing resonance method is used for construction, and the construction tools are a vibrating hammer and a cross steel plate. The grouting medium at this time is the same as that in the vibration construction. A grouting pump is used to deliver the grouting medium into the center hole of the cross steel plate (when making the hole, the center hole is closed with a hole plug), and the grouting is performed in a segmented upward manner. For example, a certain amount of grouting medium is first injected, and then the cross steel plate is lifted for a certain distance (such as 0.33m) and then grouting is performed, and then the cross steel plate is lifted and grouting is performed again until the set height is reached.

[0073] The vibration high-strength composite foundation construction process of the present invention takes a vibrator as an example. The vibrator grouting is horizontal vibration, while the vibration hammer grouting is vertical vibration.

[0074] Vertical vibration grouting has the following advantages:

[0075] 1. Improve permeability: Vertical vibration grouting stimulates sand liquefaction through mechanical vibration, reduces the shear strength of the sand foundation, thereby increasing the permeability of the sand and making the sand foundation more groutable.

[0076] 2. Expand the grouting radius: Due to the small porosity and poor permeability of the sandy soil foundation, it is difficult to inject slurry into the sandy soil with traditional static grouting technology. Vibration grouting can effectively expand the grouting radius and improve construction efficiency.

[0077] Vibro grouting has the following advantages:

[0078] 1. Improve the bearing capacity and anti-liquefaction ability of the foundation: The vibroflotation method liquefies the foundation soil through vibration, and then rearranges the soil particles, thereby reducing the void ratio and increasing the density. This not only improves the bearing capacity and deformation modulus of the foundation, but also enhances the anti-liquefaction ability of the sandy foundation.

[0079] 2. The vibration grouting cycle is short and the effect is stable. It is suitable for different geological conditions, making the slurry spread evenly and improving the strength of the injected formation.

[0080] The present invention adopts vibro-powder spraying technology, and there is no pile breakage. If the pile is broken, zero overlap construction can be achieved. It is liquefied resistant and compatible with gravel piles. The water permeability and bearing capacity are significantly improved, the construction cost is low, and the operation is simple. When the groundwater is sufficient, the powder spraying process is adopted; when the groundwater is scarce, the grouting process is adopted; the compatibility is very good.

[0081] In addition, it should be understood that those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Vibration high-strength composite foundation construction process, characterized by: The following steps are involved: Step 1: Select the stake location and set the ground zero point; Step 2: Hole making When vibro-impact construction is adopted, a hole is first made by a vibrator, the hole is completed, and the hole is cleaned to obtain a vibro-impacted hole; or, When the vibration pipe sinking method is used for construction, the construction tools are a vibration hammer and a pile pipe; there is no need to clean the hole after drilling; or, When the cross-wing resonance method is used for construction, the construction tools are a vibrating hammer and a cross steel plate. First, holes are made by using the vibrating hammer and the cross steel plate; Step 3: Fill The filling is carried out by grouting technology; the grouting medium is a main material without filler or a main material with filler; When vibratory construction is adopted, a grouting pump is used to deliver the grouting medium into the vibratory hole. Before grouting, the water pump is turned off and the vibrator is used to vibrate and compact the grouting medium. Grouting is carried out in a segmented upward manner until the set height is reached. When the vibration pipe sinking method is used for construction, the grouting medium is sent into the pile pipe by a grouting pump, and the vibrating hammer applies vibration to the pile pipe to compact the grouting medium. When the cross-wing resonance method is used for construction, a grouting pump is used to deliver the grouting medium into the center hole of the cross steel plate, and grouting is performed in sections until the set height is reached; or, The filling is carried out by using powder spraying technology; in the powder spraying construction, the powder spraying medium is divided into powder spraying medium containing crushed stone and powder spraying medium without crushed stone; If the spray medium contains crushed stone powder, first add crushed stone into the vibrating hole / pile pipe / center hole of the cross steel plate, vibrate and compact it, then spray powder. As the vibrator / pile pipe / cross steel plate is lifted and reversed, spray powder at a uniform speed until the set height is reached and stop spraying.

2. The vibration high-strength composite foundation construction process according to claim 1 is characterized in that: When using vibratory construction to drill holes, first start the water pump and air compressor. When water and air come out from the bottom of the grouting pipe on both sides of the vibrator, start the vibrator to drill holes. The drilling speed is 1 to 2 m / min until the hole is drilled to the designed depth and the hole is completed. After the hole is drilled, clean the hole. When cleaning the hole, turn off the water source and keep the air out. Finally, a vibratory hole is obtained.

3. The vibration high-strength composite foundation construction process according to claim 1 is characterized in that: When the vibration pipe sinking method is used for construction, first install the pile head at the designed pile position, place the pile pipe on the pile head, put the vibrating hammer in place, keep the pile pipe downward vertically, use the weight of the hammer and the pile pipe's own weight to slowly press statically for 1 to 2 meters, then start the vibrating hammer to vibrate and sink; during the vibration sinking process, adjust the verticality of the pile pipe in real time, and the verticality of the pile pipe should be ≤1.5%; leave vibration for 30 seconds every time it sinks 0.5 meters, until the vibrating hammer sinks the pile pipe to the designed depth, and the vibrating hammer stops vibrating.

4. The vibration high-strength composite foundation construction process according to claim 1 is characterized in that: When the cross-wing resonance method is used for construction, holes are first made using a vibrating hammer and a cross steel plate. During the hole-making process, the frequency of the vibrating hammer is adjusted, and the cross steel plate vibrates downward. Pay attention to the verticality of the cross steel plate during vibration and sinking. The sinking speed of the cross steel plate is controlled within 1.2m / min. When the designed depth is reached, it is lifted while vibrating until it reaches the ground. The lifting speed is controlled within 2.5m / min.

5. The vibration high-strength composite foundation construction process according to claim 1 is characterized in that: The main material without filler is one or more of original soil, cement, and cement slurry; the main material with filler includes reinforcing material, anticorrosion and rust inhibitor, coagulant, and cement, the reinforcing material is one or more of aggregate and fiber, and the aggregate includes crushed stone and sand.

6. The vibration high-strength composite foundation construction process according to claim 1 is characterized in that: When grouting is carried out by vibratory construction, a grouting pump is used to deliver the grouting medium into the vibratory hole. Before grouting, the water pump is turned off and the vibrator is used to vibrate to compact the grouting medium. Grouting is carried out in a segmented upward manner, such as first injecting a certain amount of grouting medium into the vibratory hole, then lifting the vibrator 0.33m and then grouting, then lifting the vibrator again and grouting again until the set height is reached.

7. The vibration high-strength composite foundation construction process according to claim 1 is characterized in that: When the vibration pipe sinking method is used for construction, a grouting pump is used to deliver the grouting medium into the pile pipe, and a vibrating hammer is used to apply vibration to the pile pipe to compact the grouting medium. The height of the grouting medium in the pile pipe must reach a certain height before the pipe can be pulled out. Before pulling out the pipe, vibrate for about 1 minute, and then pull out the pipe while vibrating. For every 0.5 to 1m of lifting, the pile pipe should be reversed by about 40cm and vibrate for 30 to 60s. This process is repeated until the entire pile pipe is pulled out, and the pulling speed is controlled at 1.2 to 1.5m / min. Repeat the above grouting and pulling steps until the pile pipe is pulled out of the ground.

8. The vibration high-strength composite foundation construction process according to claim 1 is characterized in that: When the cross-wing resonance method is used for construction, a grouting pump is used to deliver the grouting medium into the center hole of the cross steel plate, and grouting is performed in a segmented upward manner. For example, a certain amount of grouting medium is first injected, and then the cross steel plate is lifted up a certain distance and then grouting is performed again, and then the cross steel plate is lifted up again and grouting is performed again until the set height is reached.

9. The vibration high-strength composite foundation construction process according to claim 1 is characterized in that: The powder spraying system is used for powder spraying, and the powder spraying system includes an air compressor, a soot blowing tank, a soot storage tank, a gas storage tank, a soot blower, and a powder spraying pipeline; If a vibrator is used for construction, the powder spraying pipe is connected to the grouting pipe of the vibrator; If pile pipe is used for construction, the powder spraying pipe goes deep into the pile pipe; If a cross steel plate is used for construction, the powder spraying pipe is connected to the center hole of the cross steel plate.

10. The vibration high-strength composite foundation construction process according to claim 1, characterized in that: When using vibrator for construction, if powder spraying is used, the powder spraying process is used for filling; for powder spraying media containing crushed stone, crushed stone is first added to the vibrating hole, and powder spraying is performed when the density current is displayed; The no-load current of the vibrator is 45-120A, the difference between the encrypted current and the no-load current is 30-100A, and the powder spraying amount is 160±20kg per linear meter.