Double-liquid composite micro-disturbance cement-soil mixing pile equipment

Abstract

The utility model relates to double-liquid composite micro-disturbance cement-soil mixing pile equipment which comprises a power head and a driving rod, and three layers of blades are arranged at the bottom of the driving rod. The driving rod comprises a pipe wall and an inner pipe, and a cement grout air spraying pipe is arranged on the outer side of the bottommost blade and communicated with the tail end of the inner pipe. A water glass spray pipe is arranged on the outer side of the middle blade and is communicated with the pipe wall of the driving rod; and spray holes are formed in the cement grout gas spray pipe and the water glass spray pipe. The cement slurry spraying device has the advantages that the cement slurry air spraying pipe and the water glass spraying pipe are arranged on the two layers of blades respectively, water glass and cement slurry can be injected at the same time during rotation, the water glass can be evenly mixed and stirred, it is guaranteed that constructed cement soil can rapidly reach the strength of undisturbed soil, and the influence on the surrounding environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mixing pile machines, in particular to a double-fluid composite micro-disturbance cement-soil mixing pile equipment. Background Technique

[0002] With the rapid development of the national economy, the construction of urban subways has advanced by leaps and bounds. The subway lines in large and medium-sized cities crisscross. While alleviating the urban traffic pressure, it has also brought a series of construction safety problems. The most important one is the problem of the liquefaction and disturbance of the soil mass during the foundation soil reinforcement construction near the subway tunnel, which affects the operation safety of the subway.

[0003] At present, when reinforcing the foundation soil near the subway tunnel, since the early-strength liquid cannot be sprayed into the cement soil in time during the construction of the cement-soil mixing pile, and there is a problem of uneven mixing of the early-strength liquid and the cement soil, the cement soil after construction cannot quickly reach the strength of the original soil, resulting in too long deformation time and too large deformation of the adjacent subway tunnel or other important buildings, which may cause damage.

[0004] Therefore, there is an urgent need to propose a cement-soil mixing pile equipment to overcome the problems existing in the prior art. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a double-fluid composite micro-disturbance cement-soil mixing pile equipment.

[0006] This double-fluid composite micro-disturbance cement-soil mixing pile equipment, the equipment body includes: a power head and a driving rod, and three layers of blades are provided at the bottom of the driving rod;

[0007] The driving rod includes a pipe wall and an inner pipe. A cement slurry air spraying pipe is provided outside the blade at the bottommost part, and the cement slurry air spraying pipe is communicated with the end of the inner pipe; a sodium silicate spraying pipe is provided outside the blade in the middle, and the sodium silicate spraying pipe is communicated with the pipe wall of the driving rod; spray holes are provided on the cement slurry air spraying pipe and the sodium silicate spraying pipe.

[0008] The driving rod is spliced in sections. The outer diameter of the bottom end of each driving rod section is smaller than the inner diameter of the top end. The bottom end of the driving rod section is inserted into the top end of the lower driving rod section, and a hoop is fixedly sleeved outside the pipe wall at the connection of adjacent driving rod sections.

[0009] Preferably, the pipe wall and the inner pipe of the driving rod are both spliced in sections. The outer diameter of the bottom end of each inner pipe section is smaller than the inner diameter of the top end. The bottom end of the inner pipe section is inserted into the top end of the lower inner pipe section; a first waterproof rubber is provided between the bottom end of the driving rod pipe wall section and the top end of the lower driving rod section.

[0010] Preferably, grooves are respectively provided on the outer surfaces of the top and bottom of the pipe wall of the driving rod segment, and protrusions matching the grooves are provided on the upper and lower sides of the inner wall of the hoop; the protrusions on the upper and lower sides of the hoop are inserted into the two grooves on the upper and lower sides of the connection of two adjacent driving rod segments. The hoop includes two semi-circular structures, and the connection seam of the two semi-circular structures is fixed by a hinge and bolts.

[0011] Preferably, when the distance between adjacent driving rods is less than the diameter of the blade, the blades of adjacent driving rods are staggered; when the distance between adjacent driving rods is greater than the diameter of the blade, the blades of adjacent driving rods are at the same height.

[0012] Preferably, a slurry pipeline is connected to the top end of the inner pipe of the driving rod. The top surface of the inner pipe is higher than the top surface of the pipe wall of the driving rod. The gap between the inner pipe and the pipe wall is sealed by a cover plate, and a sodium silicate pipeline is connected to the cover plate.

[0013] Preferably, the driving rods are interconnected by fixing brackets. The fixing brackets include installation collar rings and cross frames. The installation collar rings are sleeved on the driving rods, and adjacent installation collar rings are interconnected by cross frames.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1) In the utility model, a cement slurry air spraying pipe and a sodium silicate spraying pipe are respectively arranged on two layers of blades, so that sodium silicate and cement slurry can be injected simultaneously during rotation, making the sodium silicate uniform during mixing and stirring, ensuring that the cement soil after construction can quickly reach the strength of the original soil, and reducing the impact on the surrounding environment.

[0016] 2) The utility model uses the driving rod itself as the grouting pipeline for cement slurry and sodium silicate. The driving rod includes a pipe wall and an inner pipe. The inner pipe is used for injecting cement slurry, and the gap between the inner pipe and the pipe wall is used for injecting sodium silicate.

[0017] 3) The utility model sets the driving rod to be spliced in segments. A hoop is fixedly sleeved on the outer side of the pipe wall at the connection of adjacent driving rod segments. When it is necessary to connect the drill, the extended driving rod can be separated and connected to meet the construction requirements of mixing piles with different depths. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a double-fluid composite micro-disturbed cement soil mixing pile equipment;

[0019] Figure 2 It is a bottom view of the driving rod of the double-fluid composite micro-disturbed cement soil mixing pile equipment;

[0020] Figure 3 It is a detailed drawing of the spray holes;

[0021] Figure 4 It is a detailed drawing of the blade and the spray pipe arranged at the bottom of the driving rod;

[0022] Figure 5 Detailed drawing of the pipeline connected to the top of the drive rod;

[0023] Figure 6 Detailed structural drawing of the connection joint of the drive rod segment;

[0024] Figure 7 Detailed structural drawing of the hoop;

[0025] Figure 8 Schematic diagram of setting two drive rods on the equipment body;

[0026] Figure 9 Schematic diagram of setting a single drive rod on the equipment body.

[0027] Explanation of reference numerals in the drawings: Equipment body 1, sodium silicate spray pipe 2, cement slurry air spray pipe 3, power head 4, blade 5, fixed bracket 6, drive rod 7, mud pipeline 8, sodium silicate pipeline 9, inner pipe 10, spray hole 11, cover plate 12, first waterproof rubber 13, second waterproof rubber 14, hoop 15. Specific implementation manners

[0028] The following further describes the present utility model in conjunction with embodiments. The description of the following embodiments is only used to help understand the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

[0029] As an embodiment, as Figures 1 to 7 shown, this double-fluid composite slightly disturbed cement-soil mixing pile equipment, the equipment body 1 includes: a power head 4 and a drive rod 7, and three layers of blades 5 are provided at the bottom of the drive rod 7; the equipment body 1 is connected to a nearby power source to provide energy for the power head 4, and the power head 4 is used to control the rotation of the drive rod 7.

[0030] The drive rod 7 includes a pipe wall and an inner pipe 10, and the gap between the pipe wall and the inner pipe 10 is used to transport sodium silicate. A cement slurry air spray pipe 3 is provided outside the blade 5 at the bottommost part, and the cement slurry air spray pipe 3 is communicated with the end of the inner pipe 10 and contains one or more of calcium chloride and cement slurry; a sodium silicate spray pipe 2 is provided outside the blade 5 in the middle, and the sodium silicate spray pipe 2 is communicated with the pipe wall of the drive rod 7; equidistantly distributed spray holes 11 are provided at the bottoms of the cement slurry air spray pipe 3 and the sodium silicate spray pipe 2, serving as the slurry outlets for calcium chloride, cement slurry and sodium silicate.

[0031] As Figure 5 shown, the top end of the inner pipe 10 of the drive rod 7 is communicated with a mud pipeline 8, the top surface of the inner pipe 10 is higher than the top surface of the pipe wall of the drive rod 7, the gap between the inner pipe 10 and the pipe wall is blocked by a cover plate 12, and a sodium silicate pipeline 9 is communicated with the cover plate 12.

[0032] The slurry pipeline 8 injects one or more of calcium chloride and cement slurry into the inner pipe 10, and then flows into the cement slurry gas injection pipe 3, and is injected into the soil body from the injection holes 11, which can reduce the resistance during the downhole drilling; the water glass pipeline 9 injects water glass into the gap between the wall of the driving rod 7 and the wall of the inner pipe 10, and then flows into the water glass injection pipe 2, and is injected into the soil body from the injection holes 11.

[0033] As Figure 6 shown, the walls of the driving rod 7 and the inner pipe 10 are spliced in sections. When it is necessary to connect the drill, the extended driving rod 7 can be separated and connected. The outer diameter of the bottom end of each section of the wall of the driving rod 7 and the inner pipe 10 is smaller than the inner diameter of the top end. The bottom end of the wall section of the driving rod 7 is inserted into the top end of the lower section of the driving rod 7. There are three layers of first waterproof rubber 13 between the bottom end of the wall section of the driving rod 7 and the top end of the lower section of the driving rod 7. The three layers of first waterproof rubber 13 are arranged adjacent to each other up and down to prevent the water glass slurry from flowing out. The bottom end of the inner pipe 10 section is inserted into the top end of the lower inner pipe 10 section, and a second waterproof rubber 14 is provided at the connection of the inner pipe 10 sections to prevent the slurry from flowing between the inside and outside of the inner pipe 10.

[0034] When using this double-fluid composite slightly disturbed cement-soil mixing pile equipment, the power head 4 controls the rotation of the driving rod 7. While the blade 5 rotates, water glass and cement slurry are injected at the same time. The blade 5 also plays a role in mixing and stirring the water glass and cement slurry evenly, ensuring that the cement soil after construction can quickly reach the strength of the original soil and reducing the impact on the surrounding environment.

[0035] Embodiment 2

[0036] As another embodiment, this Embodiment 2 is proposed on the basis of Embodiment 1, and a more specific double-fluid composite slightly disturbed cement-soil mixing pile equipment.

[0037] As Figure 6 and Figure 7 shown, a hoop 15 is fixedly sleeved on the outer side of the wall at the connection of adjacent driving rod 7 sections. Grooves are respectively provided on the outer surfaces of the top and bottom of the wall of the driving rod 7 section. Protrusions matching the grooves are provided on the upper and lower sides of the inner wall of the hoop 15; the protrusions on the upper and lower sides of the hoop 15 are inserted into the two grooves above and below the connection of adjacent two driving rod 7 sections. The hoop 15 includes two semi-circular structures. The connection seams of the two semi-circular structures are fixed by hinges and bolts, that is, hinges are provided at the connection seams on one side of the two semi-circular structures for easy opening and closing, and ear plates are provided at the other connection seam for bolt fixation, so that the hoop 15 is fixed at the connection of the driving rod 7 sections.

[0038] As Figure 1As shown, three driving rods 7 are provided, the distance between adjacent driving rods 7 is less than the diameter of the blade 5, and the blades 5 of adjacent driving rods 7 are staggered, wherein the height of the blade 5 of the middle driving rod 7 is higher than that of the driving rods 7 on both sides.

[0039] As Figure 8 shown, two driving rods 7 are provided, the distance between adjacent driving rods 7 is greater than the diameter of the blade 5, and the blades 5 of adjacent driving rods 7 are of the same height.

[0040] The driving rods 7 are connected to each other through a fixing bracket 6, and the fixing bracket 6 is arranged above the blade 5; the fixing bracket 6 includes a mounting collar and a cross frame, the mounting collar is sleeved on the driving rod 7, and adjacent mounting collars are connected to each other through the cross frame. The driving rod 7 is rotatably connected to the mounting collar, but the relative height of the mounting collar on the driving rod 7 remains unchanged.

[0041] It can also be as Figure 9 shown, only one driving rod 7 is provided, and the fixing bracket 6 does not need to be provided for a single driving rod 7.

[0042] It should be noted that the parts that are the same or similar to those in the first embodiment in this embodiment can be referred to each other, and will not be described in detail in this application.

[0043] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

Claims

1. A double-liquid composite micro-disturbance cement soil mixing pile equipment, characterized in that: The equipment body includes: a power head and a driving rod, and a three-layer blade is provided at the bottom of the driving rod; The driving rod includes a tube wall and an inner tube. A cement slurry air nozzle is provided on the outer side of the bottom blade, and the cement slurry air nozzle is connected to the end of the inner tube. A water glass nozzle is provided on the outer side of the middle blade, and the water glass nozzle is connected to the tube wall of the driving rod. Spray holes are provided on the cement slurry air nozzle and the water glass nozzle. The driving rod is spliced ​​in sections, the outer diameter of the bottom end of each driving rod section is smaller than the inner diameter of the top end, the bottom end of the driving rod section is inserted into the top end of the driving rod section below, and a clamp is fixed on the outer side of the pipe wall at the connection between adjacent driving rod sections.

2. The double-liquid composite micro-disturbance cement soil mixing pile equipment according to claim 1 is characterized in that: The drive rod tube wall and the inner tube are spliced ​​in sections, the outer diameter of the bottom end of each inner tube segment is smaller than the inner diameter of the top end, and the bottom end of the inner tube segment is inserted into the top end of the inner tube segment below; a first waterproof rubber is provided between the bottom end of the drive rod tube wall segment and the top end of the lower drive rod segment, and a second waterproof rubber is provided between the bottom end of the inner tube segment and the top end of the lower inner tube segment.

3. The double-liquid composite micro-disturbance cement soil mixing pile equipment according to claim 1 is characterized in that: The top and bottom outer surfaces of the tube wall of the driving rod segment are respectively provided with grooves, and the upper and lower sides of the inner wall of the clamp are provided with protrusions matching the grooves; the protrusions on the upper and lower sides of the clamp are inserted into the two upper and lower grooves at the connection of the two adjacent driving rod segments, and the clamp includes two semicircular structures, and the connection seam of the two semicircular structures is fixed by hinges and bolts.

4. The double-liquid composite micro-disturbance cement soil mixing pile equipment according to claim 1 is characterized in that: When the distance between adjacent driving rods is smaller than the diameter of the blade, the blades of the adjacent driving rods are staggered; when the distance between adjacent driving rods is larger than the diameter of the blade, the blades of the adjacent driving rods are of the same height.

5. The double-liquid composite micro-disturbance cement soil mixing pile equipment according to claim 1 is characterized in that: The top of the inner tube of the driving rod is connected with a mud pipeline, the top surface of the inner tube is higher than the top surface of the tube wall of the driving rod, the gap between the inner tube and the tube wall is blocked by a cover plate, and the cover plate is connected with a water glass pipeline.

6. The double-liquid composite micro-disturbance cement soil mixing pile equipment according to claim 1 is characterized in that: The driving rods are connected to each other through a fixed bracket. The fixed bracket comprises a mounting collar and a cross frame. The mounting collar is sleeved on the driving rods, and adjacent mounting collars are connected to each other through the cross frame.

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