Wall forming machine for continuous cement soil interlocking pile retaining wall in foundation pit

Abstract

The present invention proposes a wall-forming machine for continuous cement-soil interlocking pile retaining walls in foundation pits, comprising: a power device, on which an air faucet and a water faucet are provided; a drill rod mechanism connected to the power device, wherein the drill rod mechanism is used to form a plurality of interconnected continuous pile holes at one time, and the drill rod mechanism comprises a plurality of drill rods and a drill bit located at the lower part of the drill rod; a grouting pipe and an air injection pipe are provided inside the drill rod and the drill bit, the upper ends of the grouting pipe and the air injection pipe are respectively connected to the water faucet and the air faucet, and the lower ends of the grouting pipe and the air injection pipe are connected to the drill rod; two adjacent drill bits are staggered in the horizontal transverse and longitudinal directions, and their projections in the vertical direction have overlapping parts; the drill rod comprises at least two coaxially arranged straight rod sections, and at least one curved section located between the two straight rod sections; the wall-forming machine also comprises: a first device, installed at the curved section, suitable for breaking the soil portion protruding toward the inner side of the hole on the inner wall of the continuous pile hole.

Description

Technical Field

[0001] The invention discloses a wall forming machine, in particular to a wall forming machine used for continuous cement soil interlocking pile retaining walls of foundation pits. Background Art

[0002] The retaining wall is a retaining and / or water-stopping structure for a foundation pit, and is usually formed by a number of pile bodies interlocking with each other; for this interlocking pile retaining wall, the weakest position of the retaining is the interlocking position of the pile bodies; in order to obtain a wall with uniform force strength, Chinese patent document CN100485156C discloses a multi-axis drilling rig, which mainly includes: a support machine, a drilling rig power head and a drilling tool; the support machine is mainly composed of a base that can walk on the ground, a column arranged on the base, a winch unit, an operating room and a traction wire rope; the drilling rig power head is mainly composed of a movable frame, a driving device arranged on the frame and containing a prime mover, a reducer and a plurality of output shafts; the drilling tool is mainly composed of a group of drill rods, a coupling, a coupling seat and a guide device; a group of drill rods of the drilling tool are also provided with a plurality of rolling cutting devices The rolling cutting device is composed of a support fixed on a coupling seat, a mandrel supported by the support, and a cutting roller rotatably placed on the mandrel; a plurality of cutting bits are arranged on the cutting roller; driven by the output shaft of the drilling rig power head, two adjacent drill rods can rotate in opposite directions and can move up and down to drill the stratum, and the rolling cutting device can perform rotary cutting while moving downward with the drill tool; wherein, from the cutting principle, when the drill rod moves downward, the cutting bit contacts the inward protrusion of the pile hole to generate a reaction force, driving the cutting roller to rotate, thereby carrying the cutting bit to cut the soil; the technical solution disclosed in the patent document can perform interlocking pile hole drilling construction through the drilling tool, and use the rolling cutting device to cut the soil protruding into the hole at the connection position of the two pile holes to make it flat. However, the independent rolling cutting device of the technical solution has a complex structure, and under some special soil conditions, it may cause the drill rod to be unable to drill normally, such as Figure 1 As shown in the figure, Q is the drilling direction of the drill rod, D is the cutting device, F is the vertical reaction force, P is the horizontal reaction force, T is the torque, and S is the stone. When the relatively hard stone is located at the junction of the two pile holes, that is, on the inward protrusion of the pile hole, when the drill rod is drilling, although the cutting device D has a cutting roller and a cutting head, it can only move in the vertical direction and has no way to move in the horizontal direction to avoid the stone. In addition, because the cutting roller and the cutting head only use the force generated by the downward movement of the drill rod to cut the soil, and do not have their own motor-driven cutting function, they can only collide with the hard stone and it is difficult to destroy it. If there is no way to flatten the stone, the drill rod cannot drill down. As a result, the drilling rig cannot work normally. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the drilling rig with a cutting device for making the thickness of the continuous interlocking pile hole uniform in the prior art is easily blocked by hard objects located on the protruding part of the inner wall of the pile hole during the construction process, resulting in the drill rod being unable to drill in, and thus this type of drilling rig in the prior art has poor adaptability to different soil environments; therefore, a wall-building machine for continuous cement-soil interlocking pile retaining walls in foundation pits is proposed, which is used to make the thickness of the continuous interlocking pile holes uniform and has strong adaptability to different soil environments.

[0004] To this end, the present invention proposes a wall forming machine for continuous cement-soil interlocking pile retaining wall of foundation pit, comprising: a power device, on which an air injection port and a water injection port are provided; a drill rod mechanism connected to the power device, wherein the drill rod mechanism is used to form a plurality of interconnected continuous pile holes at one time, wherein the drill rod mechanism comprises a plurality of drill rods and a drill bit located at the lower part of the drill rod; a grouting pipe and an air injection pipe are provided inside the drill rod and the drill bit, and the upper ends of the grouting pipe and the air injection pipe are respectively connected to the water injection port and the air injection port, and the grouting pipe and The lower end of the air injection pipe is connected to the drill rod; the two adjacent drill bits are staggered in the horizontal direction and the longitudinal direction, and the projections in the vertical direction have overlapping parts; the drill rod includes at least two coaxially arranged straight rod sections, and at least one curved section located between the two straight rod sections; the wall-building machine also includes: a first device, installed at the curved section, suitable for being driven by the curved section to perform circumferential motion when the drill rod rotates, thereby breaking the soil part protruding toward the inside of the hole on the inner wall of the continuous pile hole through circumferential motion contact.

[0005] The above-mentioned wall-building machine, among others, further includes: a multi-axis gearbox, installed between the drill rod mechanism and the moving device, for transmitting power from the moving device to the drill rod, a synchronous gear set is arranged in the multi-axis gearbox, and the synchronous gear set is composed of a plurality of mutually coupled synchronous gears and a gear shaft connected to the synchronous gear; the drill rod is installed at the lower part of each gear shaft; wherein at least one of the first devices is installed together on the curved sections of at least two drill rods that rotate synchronously and in the same direction; the upper ends of the grouting pipe and the air injection pipe are respectively connected to the water injection port and the air injection port through the multi-axis gearbox.

[0006] In the above-mentioned wall-building machine, the drill rods are arranged in a linear manner in a cardinal number, the drill rods at both ends respectively have the curved sections, and at least one of the first devices is commonly installed on the curved sections of the drill rods at both ends.

[0007] In the above-mentioned wall-building machine, the first device is a cutting device.

[0008] In the above-mentioned wall-building machine, the cutting device is a combined cutting knife row, and connection structures suitable for connecting to drill rods are formed on both sides of the combined cutting knife row, and the combined cutting knife row is also formed with cutting teeth for cutting the soil.

[0009] In the above-mentioned wall-building machine, at least two bending sections are provided on the two drill rods rotating synchronously and in the same direction, and the first device is commonly installed on the corresponding bending sections of the two drill rods.

[0010] The above-mentioned wall-building machine, wherein the power device includes: at least one power head, the air injection port is arranged on at least one of the power heads, and at least one coupling is located below the power head and connected to the power output end of the power head; at least one of the couplings is detachably connected to the multi-axis gear box, and is used to drive the synchronous gear set of the multi-axis gear box to work; wherein two adjacent drill bits are staggered in the horizontal direction in the transverse and longitudinal directions, and the projections in the vertical direction have overlapping parts.

[0011] The above-mentioned wall forming machine, among others, further comprises an air faucet installed at the air injection port, and / or a water faucet installed at the water injection port.

[0012] The wall forming machine for continuous cement soil interlocking pile retaining wall of foundation pit of the present invention has the following technical effects compared with the prior art:

[0013] 1. A wall forming machine for continuous cement soil interlocking pile retaining wall of foundation pit, comprising: a power device, the power device is provided with an air injection port and a water injection port; a drill rod mechanism connected to the power device, wherein the drill rod mechanism is used to form a plurality of interconnected continuous pile holes at one time, wherein the drill rod mechanism comprises a plurality of drill rods and a drill bit located at the lower part of the drill rod; a grouting pipe and an air injection pipe are arranged inside the drill rod and the drill bit, the upper ends of the grouting pipe and the air injection pipe are connected to the water injection port and the air injection port respectively, and the grouting pipe and the grouting pipe are connected to the water injection port and the air injection port respectively. The lower end of the air pipe is connected to the drill rod; the two adjacent drill bits are staggered in the horizontal direction and the longitudinal direction, and the projections in the vertical direction have overlapping parts; the drill rod includes at least two coaxially arranged straight rod sections, and at least one curved section located between the two straight rod sections; the wall-building machine also includes: a first device, installed at the curved section, suitable for being driven by the curved section to move circumferentially when the drill rod rotates, so as to break the soil part protruding toward the inside of the hole on the inner wall of the continuous pile hole through circumferential motion contact. In the above design, since the drill rod has a curved section, when the drill rod rotates, the device installed in the curved section will be driven to rotate circumferentially, and the speed and force of the rotation are consistent with the rotation speed and force of the drill bit used for drilling holes, so that during the circumferential rotation process, the soil protrusions on both sides of the continuous pile holes can be continuously contacted circumferentially, such as in various forms such as collision and cutting, so that the soil protrusions are destroyed and leveled, thereby forming a continuous pile hole with a relatively uniform thickness; in addition, since the first device is in circumferential motion contact with the soil protrusions, during the circumferential motion process, when the rotation is close to the soil protrusions, .... When approaching the two sides of the continuous pile hole, the first device contacts the protruding part of the soil body. When approaching the two ends of the continuous pile hole, the first device is out of contact with the protruding part of the soil body. Therefore, even if encountering a relatively hard object, if it can be destroyed, drilling can be carried out by means of destruction. If it is too hard to be destroyed, the drill rod can be temporarily lifted up, and the position of the first device is adjusted to avoid the position of the protruding part of the soil body, and then the drill rod is pushed forward to drill. Whenever it is stuck, it is retreated and the drill rod is lifted up, and pushed forward again. Multiple back and forth reciprocations can make the first device drill without destroying the hard object protruding from the soil body. Therefore, the wall forming machine for continuous cement soil interlocking pile retaining wall of foundation pit of the present invention can be used to make the thickness of continuous interlocking pile hole uniform, and has strong adaptability to different soil environments.

[0014] 2. The present invention also includes a multi-axis gearbox installed between the drill rod mechanism and the moving device to transmit power from the moving device to the drill rod. A synchronous gear set is arranged in the multi-axis gearbox, and the synchronous gear set is composed of a plurality of mutually coupled synchronous gears and a gear shaft connected to the synchronous gear; the drill rod is installed at the lower part of each gear shaft; wherein at least one of the first devices is installed on the curved sections of at least two drill rods rotating synchronously and in the same direction; the upper ends of the grouting pipe and the air injection pipe are respectively connected to the water injection port and the air injection port through the multi-axis gearbox. The above design can be coordinated by two drill rods rotating synchronously and in the same direction, and only one first device is used to destroy the protruding part of the soil, thereby forming a continuous pile hole with uniform thickness.

[0015] 3. The drill rods are arranged in a straight line in a cardinal direction, the drill rods at both ends have the curved sections respectively, and at least one first device is installed on the curved sections of the drill rods at both ends. The above design can achieve the destruction of the soil protrusions on the inner side of a row of continuous pile holes by one first device, thereby achieving connected pile holes with uniform thickness.

[0016] 4. The first device is a cutting device, so that the protruding part of the soil body can be destroyed by cutting.

[0017] 5. The cutting device is a combined cutting knife row, and the two sides of the combined cutting knife row are formed with connection structures suitable for connecting with the drill rod, and the combined cutting knife row is also formed with cutting teeth for cutting the soil. The above design can use the cutting teeth of the cutting knife row to cut and destroy the protruding part of the soil, and even slightly hard objects can be directly cut and destroyed by rotation.

[0018] 6. At least two of the curved sections are provided on the two drill rods rotating synchronously and in the same direction, and the first device is installed on the corresponding curved sections of the two drill rods. The above design can realize that the first device is provided at more than two positions above and below a group of drill rods, thereby increasing the width of the one-time destruction of the soil protrusion, so that the soil protrusion can be better destroyed during the rapid drilling of the drill rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 It is a schematic diagram of a wall forming machine in the drilling process when there is a hard object on the hole wall in the prior art;

[0021] Figure 2It is a front elevation view of one embodiment of a wall forming machine for a continuous cement soil interlocking pile retaining wall of a foundation pit according to the present invention;

[0022] Figure 3 It is a schematic structural diagram of the first device used in the wall forming machine for the continuous cement soil interlocking pile retaining wall of the foundation pit of the present invention;

[0023] Figure 4 It is a schematic diagram of a first working state of a wall forming machine for a foundation pit continuous cement soil interlocking pile retaining wall according to the present invention;

[0024] Figure 5 It is a schematic diagram of a second working state of the wall forming machine for a foundation pit continuous cement soil interlocking pile retaining wall of the present invention;

[0025] Figure 6 It is a schematic diagram of a third working state of the wall forming machine for a foundation pit continuous cement soil interlocking pile retaining wall of the present invention;

[0026] Figure 7 It is a schematic diagram of the working state of the wall forming machine for the continuous cement soil interlocking pile retaining wall of the foundation pit of the present invention when there is a hard object in the protruding part of the soil body;

[0027] Figure 8 It is a front elevation view of another embodiment of the wall forming machine for continuous cement soil interlocking pile retaining wall of foundation pit of the present invention;

[0028] Fig. 9 It is a front elevation view of another embodiment of the wall forming machine for a foundation pit continuous cement soil interlocking pile retaining wall of the present invention;

[0029] Fig.10 It is a front elevation view of another embodiment of a wall forming machine for a foundation pit continuous cement soil interlocking pile retaining wall of the present invention;

[0030] Fig.11 It is a front elevation view of another embodiment of the wall forming machine for a foundation pit continuous cement soil interlocking pile retaining wall of the present invention;

[0031] Fig.12 It is a front elevation view of another embodiment of the wall forming machine for continuous cement soil interlocking pile retaining wall of foundation pit according to the present invention. DETAILED DESCRIPTION

[0032] Example 1

[0033] like Figure 2As shown, the wall forming machine for continuous cement soil interlocking pile retaining wall of foundation pit of this embodiment comprises: a power device 1, on which an air injection port 2 and a water injection port 3 are provided; a drill rod mechanism 8 connected to the power device, wherein the drill rod mechanism 8 is used to form a plurality of interconnected continuous pile holes at one time, wherein the drill rod mechanism comprises a plurality of drill rods, in this embodiment, the drill rods are specifically a first drill rod 12, a second drill rod 13 and a third drill rod 14, and a drill bit 8' located at the lower part of the drill rod; a grouting pipe and an air injection pipe (not marked here) are provided inside the drill rod and the drill bit, and the upper ends of the grouting pipe and the air injection pipe are respectively connected to the water injection port and the air injection port The lower ends of the grouting pipe and the air injection pipe are connected to the drill rod; the two adjacent drill bits 8' are staggered in the horizontal direction and the longitudinal direction, and the projections in the vertical direction have overlapping parts; the first drill rod and the third drill rod at least include two coaxially arranged first straight rod sections 31 and second straight rod sections 32, and a curved section 32 located between the first straight rod section and the second straight rod section; the wall-building machine also includes: a first device 50, installed at the curved section 32, suitable for being driven by the curved section 32 to perform circumferential motion when the drill rod rotates, thereby breaking the soil part protruding toward the inside of the hole on the inner wall of the continuous pile hole through circumferential motion contact. As a preferred embodiment, the wall-building machine for continuous cement-soil interlocking pile retaining wall of foundation pit of this embodiment may also include: a multi-axis gear box 9, installed between the drill rod mechanism and the moving device, transmitting power from the moving device to the drill rod, wherein a synchronous gear set is arranged in the multi-axis gear box 9, and the synchronous gear set is composed of a plurality of mutually coupled synchronous gears 10 and a gear shaft 11 connected to the synchronous gear 10; the drill rod is installed at the lower part of each gear shaft 11; wherein at least one of the first devices 50 is installed together on the curved sections of at least two drill rods rotating synchronously and in the same direction, as one embodiment, such as Figure 1 As shown, the curved sections 32 of the first drill rod 12 and the third drill rod 14 at both ends. The upper ends of the grouting pipe and the air injection pipe are respectively connected to the water injection port 3 and the air injection port 2 through the multi-axis gear box. As a preferred embodiment, the wall forming machine of this embodiment also includes an air faucet installed at the air injection port and a water faucet installed at the water injection port.

[0034] The power device preferably includes: at least one power head (not marked here), the gas injection port 2 is arranged on at least one of the power heads, at least one coupling 60 is arranged below the power head, and the coupling is connected to the power output end of the power head; at least one coupling is detachably connected to the multi-axis gearbox, used to drive the synchronous gear set of the multi-axis gearbox to work, specifically; wherein two adjacent drill bits are staggered in the horizontal direction and the longitudinal direction, and the projections in the vertical direction have overlapping parts. Wherein, the coupling 60 includes an output coupling 6 and an input coupling 7 connected to the coupling, and specifically, the input coupling 7 is connected to the synchronous gear set in the multi-axis gearbox.

[0035] As an embodiment, the drill rods are arranged in a straight line and transversely, the drill rods at both ends respectively have the curved sections, and at least one of the first devices is installed on the curved sections of the drill rods at both ends. As a preferred embodiment, the first device can be a cutting device, or other crushing devices. As an embodiment, the drill rods can also include more than four.

[0036] The cutting device may be a combined cutting blade row, both sides of which are formed with connection structures suitable for connecting with a drill rod, and the combined cutting blade row is also formed with cutting teeth for cutting the soil.

[0037] like Figure 3 As shown, the combined cutting knife row is fixedly connected by a first knife row part 21 and a second knife row part 22 through a fixing component 23, wherein the outer sides of the first knife row part 21 and the second knife row part 22 are formed with cutting teeth 24, and the first knife row part 21 and the second knife row part 22 are respectively formed with notch structures on both sides, and when the first knife row part 21 and the second knife row part are fixedly combined together by the fixing component 23, the notch part forms a drill rod mounting hole 25 for the curved section of the drill rod to pass through, i.e., the connecting structure. As one embodiment, the fixing component 23 can be a bolt, and the notch of the first knife row part 21 and the notch of the second knife row part 22 are clamped on the curved section of the drill rod, and the diameter of the drill rod mounting hole formed by the two corresponding notches is continuously reduced by continuously tightening the bolt, so as to clamp the curved section of the drill rod. The combined cutting knife row has a through hole structure in the middle, which allows the drill rods located between the drill rods used to fix the combined cutting knife row to pass through, and the through hole structure has a sufficiently large space so that the combined cutting knife row will not touch other drill rods during the rotation process of the drill rods.

[0038] like Figure 4-6As shown, they are schematic diagrams of the first working state, the second working state and the third working state of the first device when the wall forming machine of the present embodiment is used for drilling holes for the continuous cement soil interlocking pile retaining wall of the foundation pit; it can be known from the figure that the first device, that is, the combined cutter row as one of the implementation modes, rotates and rotates in the counterclockwise R direction of the drill rod. During the movement from the 3 o'clock position to the 12 o'clock position of the clock, the first cutter row part cuts the protruding part of the soil near it, so that the thickness of the hole wall on this side is uniform; when moving from the 12 o'clock position of the clock in the counterclockwise direction to the 6 o'clock position, the second cutter row part cuts the protruding part of the soil near it, so that the thickness of the hole wall on this side is uniform, thereby forming the following Figure 6 A wall hole with uniform thickness is shown.

[0039] like Figure 7 As shown, when there is a hard object S in the protruding part of the soil, when the drill rod drills down until the combined cutter row moves to the hard object S in a rotational manner, if the hardness of the hard object S is not large enough, the combined cutter row with cutting teeth can break it; if the hardness of the hard object is too large, the combined cutter row with cutting teeth contacts it, causing the combined cutter row to be blocked and unable to continue rotating. The operator can lift the drill rod a short distance, then retract the drill rod in the reciprocating direction half a circle to one circle, then push the drill rod and the drill bit down to the bottom of the drill, and drill again. After several reciprocating movements, the drill rod and the drill bit can continue to go deeper without damaging the hard object. Once the combined cutter row passes over the hard object S, normal drilling work can be resumed.

[0040] like Figure 1 As shown, the wall-building machine for continuous cement-soil interlocking pile retaining wall of foundation pit in this embodiment also includes: a sliding cava (marked here), which is arranged on the side of the multi-axis gear box 9; and a drilling rig track 16, which is respectively connected to the sliding cava and the power device.

[0041] Example 2

[0042] like Figure 8 As shown, the wall forming machine for continuous cement soil interlocking pile retaining wall in foundation pit of this embodiment is different from the above embodiment in that at least two bending sections are provided on the two drill rods rotating synchronously and in the same direction, and the first device is installed on the corresponding bending sections of the two drill rods. The above design can realize that the first device is provided at more than two upper and lower positions of a group of drill rods, thereby increasing the width of the one-time destruction of the protruding part of the soil body, so that the protruding part of the soil body can be better destroyed during the rapid drilling of the drill rod. Fig. 9The above design can realize that the first device is provided at two or more positions of the upper and lower parts of a group of drill rods, thereby increasing the width of the one-time destruction of the soil protrusion, thereby realizing that the soil protrusion can be better destroyed during the rapid drilling of the drill rod.

[0043] Example 3

[0044] like Fig.10 As shown, the wall forming machine for continuous cement soil interlocking pile retaining wall in foundation pit of this embodiment is different from the above-mentioned embodiment 1 in that: a bending section is provided on two drill rods rotating synchronously and in the same direction, and the first device is installed on the corresponding bending sections of the two drill rods. In addition, the bending section has two bending parts with an inclination angle of 45 degrees and opposite inclination directions. Fig.11 As shown, the drill rod of the wall forming machine for the continuous cement soil interlocking pile retaining wall of the foundation pit can have two bending sections as described above in this embodiment, such as Fig.12 As shown, the drill rod of the wall forming machine used for the continuous cement soil interlocking pile retaining wall of the foundation pit can have two above-mentioned bending sections bending in different directions.

[0045] The above-mentioned curved section has two inclined angles of 45 degrees, which can make it easier to squeeze out hard objects in the hole during the drilling process, making drilling and cutting easier.

[0046] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A wall forming machine for continuous cement soil interlocking pile retaining wall of foundation pit, comprising: A power device, wherein the power device is provided with an air injection port and a water injection port; A drill rod mechanism is connected to the power device, wherein the drill rod mechanism is used to form a plurality of interconnected continuous pile holes at one time, wherein the drill rod mechanism comprises a plurality of drill rods and a drill bit located at the lower part of the drill rods; a grouting pipe and an air injection pipe are arranged inside the drill rods and the drill bit, the upper ends of the grouting pipe and the air injection pipe are respectively connected to the water injection port and the air injection port, and the lower ends of the grouting pipe and the air injection pipe are connected to the drill rod; It is characterized in that Two adjacent drill bits are arranged in a staggered manner in the horizontal direction and the vertical direction, and their projections in the vertical direction have overlapping parts; The drill rod comprises at least two coaxially arranged straight rod sections and at least one curved section located between the two straight rod sections; The wall forming machine further comprises: a first device, installed at the curved section, adapted to be driven by the curved section to move circumferentially when the drill rod rotates, thereby breaking the soil part protruding toward the inner side of the hole on the inner wall of the continuous pile hole by contacting the circumferential movement; Among them, the first device is a cutting device, and the cutting device is a combined cutting knife row. The combined cutting knife row is formed with connecting structures suitable for connecting with drill rods on both sides, and the combined cutting knife row is also formed with cutting teeth for realizing cutting of the soil; the combined cutting knife row has a through hole structure in the middle, which allows the drill rods located between the drill rods used to fix the combined cutting knife row to pass through, and the through hole structure has a space so that the combined cutting knife will not touch other drill rods during the rotation of the drill rod.

2. The wall forming machine according to claim 1, characterized in that: Also includes: A multi-axis gearbox is installed between the drill rod mechanism and the power device to transmit power from the power device to the drill rod. A synchronous gear set is arranged in the multi-axis gearbox. The synchronous gear set is composed of a plurality of mutually coupled synchronous gears and a gear shaft connected to the synchronous gears. The drill rod is installed at the lower part of each gear shaft. Wherein, at least one of the first devices is installed on the curved sections of at least two drill rods rotating synchronously and in the same direction; The upper ends of the grouting pipe and the air injection pipe are connected to the water injection port and the air injection port respectively through the multi-axis gear box.

3. The wall forming machine according to claim 2, characterized in that: The drill rods are arranged in a straight line and transversely, and the drill rods at both ends respectively have the curved sections, and at least one of the first devices is commonly installed on the curved sections of the drill rods at both ends.

4. The wall forming machine according to any one of claims 1 to 3, characterized in that: At least two bending sections are arranged on the two drill rods rotating synchronously and in the same direction, and the first device is commonly installed on the corresponding bending sections of the two drill rods.

5. The wall forming machine according to claim 2 or 3, characterized in that: The power unit comprises: At least one power head; A gas tap, provided on at least one of the power heads; At least one coupling, disposed below the power head and connected to the power output end of the power head; At least one of the couplings is detachably connected to the multi-axis gearbox and is used to drive the synchronous gear set of the multi-axis gearbox to work.

6. The wall forming machine according to claim 5, characterized in that: Also includes: An air faucet is installed at the air injection port, and / or a water faucet is installed at the water injection port.

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