CN214169045U

CN214169045U - Triaxial soil cement stirring drilling equipment

Info

Publication number: CN214169045U
Application number: CN202022969083.9U
Authority: CN
Inventors: 吴飞朋; 刘西超; 宋航伟; 尚润华; 孙巧芳; 李桂英; 党奇龙; 张国强; 李帅; 张全旺; 钟飞; 郭鹏; 张绍全; 段银平; 王超; 王智
Original assignee: Sinohydro Bureau 5 Co Ltd
Current assignee: Sinohydro Bureau 5 Co Ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-09-10
Anticipated expiration: 2030-12-10

Abstract

The utility model discloses a triaxial cement mixing and drilling device, which comprises a main frame, a fixing frame, a cement tank, a mixer, a drill bit assembly, a winch and a control cabinet; the main frame is horizontally arranged, and the fixing frame is vertically arranged and connected to one side edge of the main frame; the stirrer is positioned on one side of the fixing frame far away from the main frame and is connected with the winch; the stirrer is connected with the three drill bit assemblies through the three guide rods; the drill bit assembly comprises a drill rod, and a plurality of stirring blades are connected to the drill rod; the drill rod is also fixedly connected with a crushing blade; the cement tank is communicated with the stirrer; the guide rod and the drill rod are hollow tubes and are provided with air inlet channels; liquid inlet channels are also arranged on the two drill rods positioned on the outer side, and slurry spraying ports are arranged on the two drill rods positioned on the outer side; the control cabinet is electrically connected with the winch and the stirrer. The utility model discloses technical requirement is low, has improved the efficiency of construction, and easy operation is convenient, and is safe, and use cost is low, adapts to the condition of most triaxial stirring stake construction simultaneously.

Description

Triaxial soil cement stirring drilling equipment

Technical Field

The utility model relates to a stirring stake technical field, concretely relates to triaxial soil cement stirring drilling equipment.

Background

The triaxial mixing pile is one kind of long spiral pile, and the stake machine has three auger drilling simultaneously, and three auger drilling are under construction simultaneously during the construction, generally are used for underground continuous wall method to use, are an effective form of soft foundation treatment, utilize the stirring stake machine to spout cement into the soil body and fully stir, make cement and soil take place a series of physical chemistry reaction, make the soft soil induration improve foundation strength. The triaxial mixing pile plays an important role in foundation pit support engineering, profile steel is not inserted in the middle of the triaxial mixing pile, the triaxial mixing pile is only used for water stopping, and if soil retaining is needed, the triaxial mixing pile is combined with other processes for application; one method is to insert H-shaped steel into the pile body of the mixing pile (commonly known as an SMW construction method), which can play a role of water stopping and can also be used as a retaining wall and is suitable for digging a foundation pit with shallow depth. Compared with other supporting piles, the triaxial mixing pile has high construction speed, and the pile forming time of each pile is about 30-40 minutes (about 60m can be completed in 24 hours); the water stopping effect is obvious after the pile is formed; the mechanical automation control is realized, and the operation procedure is simple; the labor investment is less, and the construction cost is low; and the triaxial mixing pile can be constructed after the groove is excavated, a mud pit is not needed on site, and the safety and civilization of the construction site are guaranteed. After the section steel is inserted, the three-shaft stirring pile plays roles of water stopping and supporting; meanwhile, the section steel can be recycled. The cement mixing pile can be divided into a wet method and a dry method according to the material spraying state. The wet method mainly uses cement paste, is uniform in stirring, is easy to re-stir and has longer cement soil hardening time; the dry method mainly uses cement dry powder, the cement soil hardening time is short, the strength among piles can be improved, but the stirring uniformity is not good enough, and the whole-process repeated stirring is difficult. The wet method is usually used as the main method. The selection of the wet method and the dry method is determined by the soil moisture content provided by a geological survey report and the construction site environment.

The construction process of the triaxial mixing pile comprises the following steps: 1. leveling the field: all ground and underground obstacles are removed, water is pumped and desilted at a low-lying position of the site, the cohesive soil is tamped and backfilled layer by layer, and lime and cement can be mixed if necessary, so that the stability of the foundation at the pile machine station position is ensured. 2. Pile position arrangement: arranging pile positions according to a design drawing, determining the pile position of each pile by using a total station on site, and marking, wherein the pile position error of each pile is +/-50 mm. After lofting, a measurement technology recheck list is made, supervision and recheck acceptance is reported, and construction can be carried out after no error is determined. 3. The pile driver is in place: the mixing pile machine reaches the operation position, is uniformly directed by the current flight leader, carefully observes the site conditions before moving, ensures that the displacement is stable and safe, and after the pile machine is in place, checks and adjusts the vertical angle between the drill rod and the ground by using a hanging hammer, and ensures that the verticality deviation is not more than 1%. Length marks in meters are drawn on a machine frame of the pile machine, so that the drilling depth of a drill rod can be observed and recorded when the drill rod enters the soil, and the pile length of the mixing pile is not less than the designed pile length. 4. Preparing cement paste: and (3) mixing cement paste according to a pile forming process test, pouring the cement paste into a paste storage barrel before grouting, wherein the retention time of the prepared cement paste is not more than 2 hours. 5. Pre-stirring and sinking: starting a shotcrete machine, loosening a steel wire rope of a winch, enabling the slurry shotcrete machine to perform slurry spraying and cutting along a guide frame from top to bottom, sinking soil, starting an mortar pump and spraying simultaneously, rotating while spraying, enabling cement slurry and in-situ foundation soil to be fully mixed until the cement slurry sinks and drills to the elevation of the pile bottom, and performing in-situ slurry spraying for more than 30 seconds. 6. Lifting, spraying and stirring: when the grout reaches the bottom of the pile, the stirring drill bit is lifted at the speed determined by the test, the grout spraying and the rotation are carried out simultaneously, the mortar pump is closed after the stirring drill bit is lifted to the position 50cm away from the ground or the designed elevation of the pile top, and the grout spraying is rotated in situ for 30s, so that the pile head is ensured to be uniform and compact. 7. Repeating the upper stirring and the lower stirring: when the shotcrete machine is lifted to the designed pile top elevation, in order to make the soft soil and cement slurry uniform, the slurry shotcrete machine is rotated and sunk into the soil again, and the slurry shotcrete machine is lifted to the ground after the designed reinforcement depth. 8. Lifting the drill, transferring: and lifting the stirring drill bit out of the ground, stopping the main motor and the air compressor, filling the construction side station record, shifting the pile machine, correcting the verticality of the pile machine, and then performing the next pile construction.

However, the existing triaxial mixing pile has the following problems: (1) the working efficiency is not high, the pile forming of the triaxial cement soil mixing pile completely depends on the drilling rod power drilling, and the pile forming speed is slow; (2) the replacement soil is more, and the replacement soil amount of the triaxial cement soil mixing pile is about 30% of the pile volume; (3) the pile quality is poor, the pile quality is not guaranteed, and water leakage accidents are often caused after excavation of foundation pit earthwork.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a triaxial soil cement stirring drilling equipment can solve current triaxial stirring stake work efficiency not high, the replacement soil is more, the construction site is narrow, special stratum becomes shortcoming such as the stake quality is relatively poor.

For solving the technical problem, the utility model discloses the technical scheme who adopts does:

a triaxial cement soil mixing and drilling device comprises a main frame, a fixing frame, a cement tank, a mixer, a drill bit assembly, a winch and a control cabinet; the main frame is horizontally arranged, and the fixing frame is vertically arranged and connected to one side edge of the main frame; the stirrer is positioned on one side of the fixing frame far away from the main frame, and the stirrer is wound on a winch arranged on the main frame through a steel wire rope; three groups of driving devices are arranged in the stirrer and are correspondingly connected with the three drill bit assemblies through three guide rods which are arranged in parallel side by side; the drill bit assembly comprises a drill rod, the upper end of the drill rod is fixedly connected with the lower end of the guide rod, the lower end of the drill rod is a conical drill bit, and a plurality of stirring blades are fixedly connected onto the drill rod; the drill rod is also fixedly connected with a crushing blade, and the crushing blade is positioned below the stirring blade; the cement tank is communicated with the stirrer through a slurry conveying conduit; the guide rod and the drill rod are hollow tubes, and an air inlet channel is arranged in each guide rod and each drill rod; liquid inlet channels are respectively arranged on the two drill rods positioned on the outer side, and an upper grout spraying port and a lower grout spraying port are respectively arranged at the upper part and the lower part of the two drill rods positioned on the outer side; the control cabinet is electrically connected with the winch and the stirrer and is used for controlling the starting, the stopping, the rotating speed and the forward and reverse rotation of the winch and the stirrer.

As a further technical scheme of the technical scheme, the stirring blades are of a sheet-shaped structure, the stirring blades are welded on the drill rod at an angle of 15-30 degrees, the stirring blades are arranged on the drill rod in 4-6 rows in a surrounding mode, and each row of stirring blades is arranged at intervals of 0.8-1.2 m in a mutually perpendicular mode.

As a further technical scheme of the technical scheme, a reinforcing rib is fixedly connected between the crushing blade and the drill rod.

As a further technical scheme of the above technical scheme, the frame further comprises a support frame, and the support frame is connected between the main frame and the fixing frame in a supporting manner.

As a further technical solution of the above technical solution, the main frame and the fixing frame are provided with a fixed pulley over which the steel wire rope passes.

Compared with the prior art, the utility model, following advantage and beneficial effect have: the technical requirement is low, the construction efficiency is improved, the operation is simple and convenient, the safety is realized, the use cost is low, the construction condition of most triaxial mixing piles is adapted, the applicability is strong, the operation is visual and effective, and the construction progress of the operation of the triaxial mixer can be effectively guaranteed.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the drill bit assembly of the present invention.

The explanation of each reference number in the figure is: the device comprises a stirrer 1, a guide rod 2, a drill bit assembly 3, a fixing frame 4, a supporting frame 5, a main frame 6, a control cabinet 7, a steel wire rope 8, a cement tank 9, a slurry conveying guide pipe 10, a winch 11, a fixed pulley 12, an upper slurry spraying port 31, a stirring blade 32, a drill rod 33, a lower slurry spraying port 34, a reinforcing rib 35, a crushing blade 36 and a drill bit 37.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so as to further understand the concept, the technical problems to be solved, the technical features constituting the technical solutions, and the technical effects brought by the technical solutions of the present invention.

It should be understood that the description of these embodiments is illustrative and not restrictive in any way, and that the embodiments described are only some but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, provided in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of preferred embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in figure 1, a triaxial soil cement mixing drilling equipment include body frame 6, mount 4, support frame 5, cement jar 9, mixer 1, drill bit assembly 3, hoist engine 11, switch board 7.

The main frame 6 is horizontally arranged, the main frame 6 is used as a main bearing part of the device, and the control cabinet 7 and the winch 11 are installed on the main frame 6.

The fixing frame 4 is vertically arranged and is a main supporting component of the device, and the fixing frame 4 is arranged at the edge of one side of the main frame 6.

The support frame 5 is obliquely arranged, the lower end of the support frame is connected to the top of the main frame 6, and the upper end of the support frame is connected with the side wall of the fixing frame 4 and used for supporting the fixing frame 4.

The mixer 1 is arranged on one side of the fixing frame 4 far away from the main frame 6, and the mixer 1 is connected with the drill bit assembly 3 through the guide rod 2. The top of the fixed frame 4 and the top of the main frame 6 are both fixedly connected with a fixed pulley 12, and a steel wire rope 8 on the winch 11 is connected to the top of the stirring machine 1 after bypassing the fixed pulley 12 for realizing the lifting of the stirring machine 1 and the drill bit assembly 3.

Three groups of driving devices are arranged in the stirrer 1 and are correspondingly connected with three drill bit assemblies 3 through three guide rods 2 which are arranged in parallel side by side.

As shown in fig. 2, the drill head assembly 3 includes a drill rod 33, an upper end of the drill rod 33 is fixedly connected with a lower end of the guide rod 2, a lower end of the drill rod 33 is a conical drill head 37, a plurality of stirring blades 32 are welded on the drill rod 33, the stirring blades 32 are of a sheet-shaped steel structure, the stirring blades 32 are welded on the drill rod 33 at an angle of 15-30 degrees, the stirring blades 32 are arranged on the drill rod 33 in 4-6 rows in a surrounding manner, and each row of the stirring blades 32 is arranged at an interval of 0.8-1.2 m in a mutually perpendicular manner. The stirring vanes 32 arranged in the above manner have a good stirring action. The drill rod 33 is also welded with a crushing blade 36, and the crushing blade 36 is positioned below the stirring blade 32. Reinforcing ribs 35 are welded between the crushing blade 36 and the drill rod 33 to improve the strength of the crushing blade 36 and facilitate crushing of hard objects such as stone chips.

The guide rod 2 and the drill rod 33 are hollow pipes, an air inlet channel is arranged in each guide rod 2 and each drill rod 33, liquid inlet channels are further arranged on the two drill rods 33 positioned on the outer sides respectively, and an upper grout spraying port 31 and a lower grout spraying port 34 are arranged on the upper portion and the lower portion of each drill rod 33 respectively, so that cement grout can be conveniently injected.

The cement tank 9 is communicated with the mixer 1 through the slurry conveying guide pipe 10, and the mortar is sprayed out from the upper slurry spraying port 31 and the lower slurry spraying port 34 of the two outer drill rods 33 after sequentially passing through the cement tank 9, the slurry conveying guide pipe 10, the mixer 1, the guide rod 2 and the drill rods 33. The soil body is extruded and cut by the crushing blade 36, and then the soil body and mortar are stirred by the stirring blade 32, so that pile making is completed.

The control cabinet 7 is electrically connected with the winch 11 and the stirrer 1 and is used for controlling the starting, the stopping, the rotating speed and the forward and reverse rotation of the winch 11 and the stirrer 1.

The utility model discloses an operation flow as follows: firstly, the whole device is remotely operated and controlled to be started through a control cabinet 7; secondly, the mixer 1 drives the guide rods 2 and the drill rods 33 to start to rotate, and the three guide rods 2 and the drill rods 33 simultaneously exhaust air through the air inlet channel; thirdly, the steel wire rope 8 enables the drill bit assembly 3 to cut soil from top to bottom, mix and sink through the rotation of the winch 11 until the drill bit assembly 3 sinks and drills to the elevation of the pile bottom; fourthly, according to the construction process requirements, cement grout is required to be injected into the drill rods 33 during sinking and lifting, the cement grout formed after cement processing is firstly stored in the cement tank 9 and then is injected into the liquid inlet channels of the drill rods 33 on the two sides through the grout conveying guide pipe 10, and the grout is sprayed by 70-80% when the drill rods descend and 20-30% when the drill rods ascend. Through above-mentioned working method, reach the construction achievement of triaxial soil cement mixing pile, the utility model discloses can solve that triaxial soil cement mixing pile work efficiency is not high, and the replacement soil is more, and the site construction is narrow, and special stratum becomes the relatively poor shortcoming of stake quality, adapts to the condition of most triaxial mixing pile construction.

1 triaxial cement soil mixing and drilling device is configured in the construction of six foundation pit enclosure triaxial mixing piles in the Zhengzhou harbor area. The triaxial cement soil mixing pile is characterized in that cement paste is injected into a soil body through a triaxial mixer, the cement paste and the soil body are uniformly mixed through the triaxial mixer, and a cylindrical consolidation body is formed in the soil layer after the cement paste is solidified. The cement soil mixing pile is reinforced, so that the bearing capacity of foundation soil can be improved, the passive soil pressure of the soil body on the inner side of the enclosure wall is increased, the compression deformation of the soil body and the horizontal displacement of the enclosure wall are reduced, and the uplift resistance stability and the side slope excavation stability of the bottom of a foundation pit are improved. The triaxial mixing pile has another important function of being used as a foundation pit waterproof curtain, particularly in dense areas of urban buildings, the foundation pit earthwork excavation is convenient, soil bodies on the inner side of the foundation pit need to be drained and dewatered, and a waterproof curtain needs to be arranged on the outer side of a foundation pit enclosure structure to separate hydraulic connection inside and outside the foundation pit in order to prevent buildings, pipelines and the like on the periphery of the foundation pit from generating uneven settlement. The cement slurry is pumped into the drill rod, sprayed into the soil body under a small pressure, and uniformly stirred with the soil body through the stirring drill bit. The utility model provides an above-mentioned problem after, improved the efficiency of construction, guaranteed construction quality, reduced construction cost, adapt to the unfavorable condition of most triaxial stirring stake simultaneously, not only alleviateed staff's pressure and burden, still let this kind of triaxial cement stirring drilling equipment can obtain more wide application in the society.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a triaxial soil cement stirring drilling equipment which characterized in that: comprises a main frame (6), a fixing frame (4), a cement tank (9), a stirrer (1), a drill bit component (3), a winch (11) and a control cabinet (7); the main frame (6) is horizontally arranged, and the fixing frame (4) is vertically arranged and connected to one side edge of the main frame (6); the stirrer (1) is positioned on one side of the fixing frame (4) far away from the main frame (6), and the stirrer (1) is wound on a winch (11) arranged on the main frame (6) through a steel wire rope (8); three groups of driving devices are arranged in the stirrer (1) and are correspondingly connected with the three drill bit assemblies (3) through three guide rods (2) which are arranged in parallel side by side; the drill bit assembly (3) comprises a drill rod (33), the upper end of the drill rod (33) is fixedly connected with the lower end of the guide rod (2), the lower end of the drill rod (33) is a conical drill bit (37), and a plurality of stirring blades (32) are fixedly connected to the drill rod (33); the drill rod (33) is also fixedly connected with a crushing blade (36), and the crushing blade (36) is positioned below the stirring blade (32); the cement tank (9) is communicated with the stirrer (1) through a slurry conveying conduit (10); the guide rod (2) and the drill rod (33) are hollow tubes, and an air inlet channel is arranged in each guide rod (2) and each drill rod (33); liquid inlet channels are respectively arranged on the two drill rods (33) positioned on the outer side, and an upper guniting port (31) and a lower guniting port (34) are respectively arranged at the upper part and the lower part of the two drill rods (33) positioned on the outer side; the control cabinet (7) is electrically connected with the winch (11) and the stirrer (1) and is used for controlling the starting, the stopping, the rotating speed and the forward and reverse rotation of the winch (11) and the stirrer (1).

2. The triaxial soil cement mixing drilling apparatus of claim 1, wherein: the stirring blades (32) are of a sheet-shaped structure, the stirring blades (32) are welded on the drill rod (33) at an angle of 15-30 degrees, the stirring blades (32) are arranged on the drill rod (33) in 4-6 rows in a surrounding mode, and one stirring blade (32) is arranged on each row at intervals of 0.8-1.5 m in a mutually perpendicular mode.

3. The triaxial soil cement mixing drilling apparatus of claim 1, wherein: and a reinforcing rib (35) is fixedly connected between the crushing blade (36) and the drill rod (33).

4. The triaxial soil cement mixing drilling apparatus of claim 1, wherein: the frame is characterized by further comprising a support frame (5), wherein the support frame (5) is connected between the main frame (6) and the fixing frame (4) in a supporting mode.

5. The triaxial soil cement mixing drilling apparatus of claim 1, wherein: the main frame (6) and the fixing frame (4) are provided with fixed pulleys (12) for the steel wire rope (8) to stride over.