Loose soil body reinforcing device

Abstract

The utility model relates to a loose soil body reinforcing device which comprises a grouting steel pipe assembly and a drill rod assembly. The grouting steel pipe assembly serves as a pile formwork for reinforcing the loose soil body, grout extends towards the soil body around the grouting steel pipe through the grouting holes, after the grout is solidified, the grouting steel pipe and the surrounding soil body form a reinforcing pile, and therefore the fastening degree of the loose soil body is increased; before the grouting steel pipe assemblies are sequentially spliced and inserted into the soil body, the soil body in the grouting steel pipes is taken out through the drill rod assemblies, the resistance of the grouting steel pipes entering the soil can be reduced, meanwhile, the soil scattering amount in the grouting steel pipes can be reduced, and the formed reinforcing pile is more stable; an arc-shaped blade covering structure is arranged outside the grouting hole, so that when the grouting steel pipe is inserted into a soil body, surrounding loose soil is prevented from entering the grouting steel pipe through the grouting hole; when the length of the grouting steel pipe meets the reinforcing requirement, the grouting steel pipe in the soil body is rotated, the arc-shaped blades are opened under the resistance effect of the soil body, the grouting holes are leaked out, and slurry is not influenced to be diffused all around.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit construction, in particular to a loose soil reinforcement device. Background Art

[0002] With the rapid development of urbanization in my country, the utilization of underground space has become the mainstream of modernization. In the process of foundation pit support construction, various forms of foundation pit support are selected according to different soil properties, construction environment, site scope, excavation depth, economic cost and construction difficulty.

[0003] When loose soil appears locally on the slope of foundation pit support construction, if a large excavation slope support form is used, the construction site space requirement is relatively large; when cement soil gravity retaining wall is used, the cement slurry dosage needs to be increased and the excavation depth needs to be increased; when steel cement soil mixing wall or pile support is used, the construction is difficult and costly, the construction period is long, and large equipment is required; when soil nail wall slope support is used, the soil nail hole is prone to collapse and it is difficult to form holes for grouting. Therefore, it is an urgent problem for technicians in this field to invent a device for local loose soil, which is simple to operate and has good soil reinforcement effect. Utility Model Content

[0004] The utility model aims to solve the problem that the above method for reinforcing local loose soil is not perfect, thereby providing a loose soil reinforcement device.

[0005] The utility model solves the above problems and adopts the following technical solutions:

[0006] A loose soil reinforcement device comprises a grouting steel pipe assembly and a drill rod assembly, wherein the grouting steel pipe assembly is formed by splicing and fixing a plurality of sections of grouting steel pipes, a plurality of grouting holes are arranged on the side wall of the grouting steel pipe at intervals, an arc-shaped blade is wrapped around the outer side of the grouting hole, one vertical side wall of the arc-shaped blade is rotatably connected to the side wall of the grouting steel pipe, a grouting steel pipe rotary rod is fixed on the top of the grouting steel pipe assembly; the drill rod assembly is formed by splicing and fixing a plurality of sections of drill rods, a spiral blade is arranged on the side wall of the drill rod, a drill rod rotary rod is fixed on the top of the drill rod assembly, and the drill rod assembly is used to take out the soil in the grouting steel pipe assembly.

[0007] Compared with the prior art, the utility model adopting the above technical solution has the following beneficial effects:

[0008] 1. The grouting steel pipe assembly of the device is used as a pile template for reinforcing loose soil. After the grouting steel pipe is inserted into the soil, grouting is injected into the grouting steel pipe, and the slurry extends to the soil around the grouting steel pipe through the grouting hole. After the slurry solidifies, the grouting steel pipe and the surrounding soil form a reinforcement pile, thereby increasing the tightness of the loose soil;

[0009] 2. Before the grouting steel pipe components are spliced ​​and inserted into the soil in sequence, the soil in the grouting steel pipe is taken out using the drill rod assembly, which can reduce the resistance of the grouting steel pipe entering the soil. At the same time, it can reduce the amount of loose soil in the grouting steel pipe, thereby increasing the amount of slurry and making the formed reinforced pile more stable;

[0010] 3. By setting a structure covered by an arc blade outside the grouting hole, it is prevented that when the grouting steel pipe is inserted into the soil, the surrounding loose soil enters the grouting steel pipe through the grouting hole and affects the grouting effect; when the length of the grouting steel pipe reaches the required length of the reinforced pile, the grouting steel pipe in the soil is rotated, and the arc blade opens under the resistance of the soil and leaks out of the grouting hole, which does not affect the diffusion of the slurry to the surroundings.

[0011] As a preferred embodiment, a further technical solution of the utility model is:

[0012] The grouting steel pipe assembly includes a first section grouting steel pipe, a standard section grouting steel pipe and a tail section grouting steel pipe. The upper outer walls of the first section grouting steel pipe and the standard section grouting steel pipe are provided with an external thread section, and the lower inner walls of the standard section grouting steel pipe and the tail section grouting steel pipe are provided with an internal thread section. The first section grouting steel pipe is connected with the standard section grouting steel pipe and the tail section grouting steel pipe in sequence through the external thread section and the internal thread section, or the first section grouting steel pipe is connected with the tail section grouting steel pipe. Through the above structure, each section of the grouting steel pipe can be quickly, conveniently and firmly spliced ​​together.

[0013] The drill rod assembly includes a first drill rod section, a standard drill rod section and a tail drill rod section. The top outer walls of the first drill rod section and the standard drill rod section are provided with a through-pin hole. The bottom outer walls of the standard drill rod section and the tail drill rod section are fixed with a spring pin. The first drill rod section is connected to the standard drill rod section and the tail drill rod section in sequence through the spring pin and the pin hole, or the first drill rod section is connected to the tail drill rod section. Through the above structure, each drill rod section can be quickly split and spliced ​​together.

[0014] The bottom end of the first drill rod is a cone with the tip pointing downward, which makes it easier for the front end of the drill rod to break through the soil and screw into the soil, making the operation more labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structural combination of the utility model;

[0016] Figure 2 This is a structural diagram of a grouting steel pipe assembly of the utility model;

[0017] Figure 3 This is a structural diagram of a drill rod assembly of the utility model;

[0018] Figure 4 yes Figure 1 A top view of

[0019] Figure 5 This is the structural diagram of the tail section grouting steel pipe;

[0020] Figure 6 This is the structural diagram of the standard section grouting steel pipe;

[0021] Figure 7 This is the structural diagram of the tail section drill pipe;

[0022] Figure 8 This is the structural diagram of the standard section drill pipe;

[0023] Fig. 9 It is a schematic diagram of the curved blade in the open state;

[0024] In the figure: 1. First section of grouting steel pipe; 2. Standard section of grouting steel pipe; 3. Tail section of grouting steel pipe; 31. Grouting steel pipe rotary rod; 4. First section of drill rod; 5. Standard section of drill rod; 6. Tail section of drill rod; 61. Drill rod rotary rod; 62. Spring latch; 7. Arc blade; 8. Grouting hole; 9. Circumferential groove; 10. Spiral blade. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0026] See attached Figure 1-9 The utility model discloses a loose soil reinforcement device, including a grouting steel pipe assembly and a drill rod assembly, wherein the grouting steel pipe assembly is formed by splicing and fixing a plurality of grouting steel pipes, and a plurality of grouting holes 8 are arranged on the side wall of the grouting steel pipe at intervals, and an arc blade 7 is wrapped on the outer side of the grouting hole 8, and one vertical side wall of the arc blade 7 is rotatably connected to the side wall of the grouting steel pipe, and a grouting steel pipe rotary rod 31 is fixed on the top of the grouting steel pipe assembly; the drill rod assembly is formed by splicing and fixing a plurality of drill rods, and a spiral blade 10 is arranged on the side wall of the drill rod, and a drill rod rotary rod 61 is fixed on the top of the drill rod assembly, and the drill rod assembly is used to take out the soil in the grouting steel pipe assembly.

[0027] In this embodiment, the grouting steel pipe assembly includes a first section grouting steel pipe 1, a standard section grouting steel pipe 2 and a tail section grouting steel pipe 3. Grouting holes 8 and arc blades 7 are provided on the first section grouting steel pipe 1 and the standard section grouting steel pipe 2. A grouting steel pipe rotating rod 31 is provided on the tail section grouting steel pipe 3. The upper outer walls of the first section grouting steel pipe 1 and the standard section grouting steel pipe 2 are provided with external thread sections, and the lower inner walls of the standard section grouting steel pipe 2 and the tail section grouting steel pipe 3 are provided with internal thread sections. The first section grouting steel pipe 1 is connected in sequence with the standard section grouting steel pipe 2 and the tail section grouting steel pipe 3 through the external thread sections and the internal thread sections, or the first section grouting steel pipe 1 is connected with the tail section grouting steel pipe 3. Through the above structure, each section of the grouting steel pipe can be quickly and conveniently firmly spliced ​​together.

[0028] In this embodiment, the drill rod assembly includes a first drill rod section 4, a standard drill rod section 5 and a tail drill rod section 6. The side walls of the first drill rod section 4 and the standard drill rod section 5 are fixed with spiral blades, the top of the tail drill rod section 6 is fixed with a drill rod rotating rod 61, the top outer walls of the first drill rod section 4 and the standard drill rod section 5 are provided with a through latch hole, the bottom outer walls of the standard drill rod section 5 and the tail drill rod section 6 are fixed with a spring latch 62, the first drill rod section 4 is connected with the standard drill rod section 5 and the tail drill rod section 6 in sequence through the spring latch 62 and the latch hole, or the first drill rod section 4 is connected with the tail drill rod section 6. Through the above structure, each drill rod section can be quickly split and spliced ​​together.

[0029] In this embodiment, the bottom end of the first section of the drill rod 4 is a cone with a pointed tip downward, which is convenient for the front end of the drill rod to break the soil and screw into the soil, and the operation is more labor-saving.

[0030] In this embodiment, the grouting steel pipe assembly of the device is used as a pile template for reinforcing loose soil. After the grouting steel pipe is inserted into the soil, grouting is injected into the grouting steel pipe, and the slurry extends to the soil around the grouting steel pipe through the grouting hole 8. After the slurry solidifies, the grouting steel pipe and the surrounding soil form a reinforcement pile, thereby increasing the tightness of the loose soil; before the grouting steel pipe assembly is spliced ​​and inserted into the soil in sequence, the soil in the grouting steel pipe is taken out using the drill rod assembly, which can reduce the resistance of the grouting steel pipe entering the soil. At the same time, the amount of loose soil in the grouting steel pipe can be reduced, thereby increasing the amount of slurry and making the formed reinforcement pile more stable; a structure covered by an arc blade 7 is provided outside the grouting hole 8 to prevent the surrounding loose soil from entering the grouting steel pipe through the grouting hole 8 when the grouting steel pipe is inserted into the soil, thereby affecting the grouting effect; when the length of the grouting steel pipe reaches the reinforcement requirement, the grouting steel pipe in the soil is rotated, and the arc blade 7 is opened under the resistance of the soil, leaking out of the grouting hole 8, without affecting the diffusion of the slurry to the surroundings.

[0031] The construction steps of using this device to reinforce loose soil are as follows:

[0032] Step 1: Determine the location of the loose soil supporting the slope, measure and locate the construction, determine the number of reinforcement piles, drilling location and angle for the loose soil reinforcement construction, and dig the pilot hole at the drilling location;

[0033] Step 2: Place the bottom of the prefabricated first section of the grouting steel pipe 1 at the lead hole position and perform angle correction; a plurality of grouting holes 8 penetrating the side wall of the grouting steel pipe are pre-spaced and arranged on the side wall, and the outer side of the grouting holes 8 is covered with an arc blade 7, and the blade beam side of the arc blade 7 is arranged on the outer wall of the grouting steel pipe through a rotating shaft;

[0034] Step 3: prefabricate a multi-section drill rod that can be spliced, splice the first section drill rod 4 and the tail section drill rod 6, screw them into the grouting steel pipe and screw them into the soil below it along the angle of the grouting steel pipe. Pre-fix the spiral blade 10 on the first section drill rod 4, pull out the drill rod along the direction of the grouting steel pipe, so that the spiral blade 10 brings out the soil in the middle and below the grouting steel pipe, confirm that the arc blade 7 is in a closed state and covers the grouting hole 8, and then insert the grouting steel pipe into the soil at the set angle;

[0035] Step 4: splice the standard section grouting steel pipe 2 on the first section grouting steel pipe 1. The standard section grouting steel pipe 2 is also provided with grouting holes 8 and arc blades 7. At the same time, the first section drill rod 4 and the tail section drill rod 6 are split, and the standard section drill rod 5 is spliced ​​in the middle to increase the length of the drill rod. The length of the spliced ​​drill rod is greater than the length of the spliced ​​grouting steel pipe. Repeat the soil taking and pipe insertion operations of step 3 again;

[0036] Step 5: Repeat the operation of step 4 until the length of the grouting steel pipe inserted into the soil reaches the length requirement of the reinforcement pile for reinforcing the loose soil;

[0037] Step 6: Splice the tail section grouting steel pipe 3 on the uppermost section of the spliced ​​grouting steel pipe, install a grouting steel pipe rotating rod 31 on the top of the tail section grouting steel pipe 3, rotate the grouting steel pipe by the grouting steel pipe rotating rod 31, and use the soil resistance to open the arc blade 7 and insert it into the soil, exposing the grouting hole 8;

[0038] Step 7: Remove the tail section grouting steel pipe 3, inject grout into the grouting steel pipe in the soil, and the slurry penetrates around and below the grouting steel pipe through the grouting holes 8, and aggregates with the soil to form a reinforcement pile.

[0039] In this embodiment, a plurality of circumferential grooves 9 are provided on the side walls of the first section grouting steel pipe 1 and the standard section grouting steel pipe 2, and the grouting holes 8 are provided on the inner walls of the circumferential grooves 9. Fig. 9 A rotating shaft socket is provided on the top surface and the right side of the bottom surface of the circumferential groove 9, and a rotating shaft is fixed on the blade beam side of the arc-shaped blade 7, and the upper and lower ends of the rotating shaft are inserted into the rotating shaft sockets on the upper and lower sides; the circumferential groove 9 is arranged so that there is storage space when the arc-shaped blade 7 is closed, so as to avoid the arc-shaped blade 7 from being accidentally opened when the grouting steel pipe is inserted into the soil. The blade side of the arc-shaped blade 7 is a free end. When the arc-shaped blade 7 is in a closed state, the blade side of the arc-shaped blade 7 slightly protrudes from the surface of the circumferential groove 9. When the grouting steel pipe is rotated clockwise, the blade is subjected to the resistance of the soil and rotates counterclockwise, and the arc-shaped blade 7 is opened and inserted into the soil, so that the grouting hole 8 is exposed in the soil.

[0040] The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent changes made using the contents of the present utility model specification and its drawings are included in the scope of rights of the present utility model.

Claims

1. A loose soil reinforcement device, comprising a grouting steel pipe assembly and a drill rod assembly, characterized in that: The grouting steel pipe assembly is formed by splicing and fixing a plurality of sections of grouting steel pipes, a plurality of grouting holes (8) are arranged at intervals on the side wall of the grouting steel pipe, an arc-shaped blade (7) is wrapped around the outside of the grouting hole (8), one vertical side wall of the arc-shaped blade (7) is rotatably connected to the side wall of the grouting steel pipe, and a grouting steel pipe rotary rod (31) is fixed on the top of the grouting steel pipe assembly; the drill rod assembly is formed by splicing and fixing a plurality of sections of drill rods, a spiral blade (10) is arranged on the side wall of the drill rod, and a drill rod rotary rod (61) is fixed on the top of the drill rod assembly, and the drill rod assembly is used to remove soil from the grouting steel pipe assembly.

2. The loose soil reinforcement device according to claim 1, characterized in that: The grouting steel pipe assembly comprises a first section grouting steel pipe (1), a standard section grouting steel pipe (2) and a tail section grouting steel pipe (3); the upper outer walls of the first section grouting steel pipe (1) and the standard section grouting steel pipe (2) are provided with an external thread section, and the lower inner walls of the standard section grouting steel pipe (2) and the tail section grouting steel pipe (3) are provided with an internal thread section; the first section grouting steel pipe (1) is connected in sequence with the standard section grouting steel pipe (2) and the tail section grouting steel pipe (3) by means of the external thread section and the internal thread section, or the first section grouting steel pipe (1) is connected with the tail section grouting steel pipe (3).

3. The loose soil reinforcement device according to claim 1, characterized in that: The drill rod assembly comprises a first drill rod section (4), a standard drill rod section (5) and a tail drill rod section (6); the top outer walls of the first drill rod section (4) and the standard drill rod section (5) are provided with a through-going latch hole; the bottom outer walls of the standard drill rod section (5) and the tail drill rod section (6) are fixed with a spring latch (62); the first drill rod section (4) is connected to the standard drill rod section (5) and the tail drill rod section (6) in sequence through the cooperation of the spring latch (62) and the latch hole, or the first drill rod section (4) is connected to the tail drill rod section (6).

4. The loose soil reinforcement device according to claim 3 is characterized in that: The bottom end of the first section of the drill rod (4) is in a cone shape with the tip pointing downward.

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