Foundation reinforcing equipment for cooperative vibration immersed tube compaction gravel pile method and grouting method

Abstract

The utility model discloses a foundation reinforcement device cooperating with a vibration immersed tube compaction gravel pile method and a grouting method, and relates to the technical field of foundation treatment in geotechnical engineering, the foundation reinforcement device comprises an outer-layer pile pipe, an inner-layer pile pipe and a vibration hammer, the top of the outer-layer pile pipe is provided with a filling port, the bottom end of the outer-layer pile pipe is provided with a plurality of valve pile tips, and the inner-layer pile pipe is connected with the vibration hammer. The multiple valve pile tips form a tip structure; the inner-layer pile pipe is arranged on the inner side of the outer-layer pile pipe, and grouting holes are formed in the pipe wall of the inner-layer pile pipe. The vibratory hammer is arranged at the top end of the outer-layer pile pipe. Firstly, the outer-layer pile pipe is sunk into foundation soil through cooperation of the vibratory hammer and the outer-layer pile pipe; then the valve pile tip is opened, the outer-layer pile pipe is gradually lifted out, and in the lifting-out process, gravel is backfilled through a filling opening; and after the outer-layer pile pipe is completely pulled out and backfilling is completed, grouting is conducted through the inner-layer pile pipe. A compaction pile method and a grouting method are combined, and the advantages of the two methods are brought into full play.

Description

TECHNICAL FIELD

[0001] The utility model relates to the ground treatment technical field in geotechnical engineering more specifically relates to a kind of ground reinforcement equipment of collaborative vibration sinking pipe extruding crushed stone pile method and grouting method. BACKGROUND

[0002] The stability of foundation is an important prerequisite for ensuring the long-term safety and stability of buildings. The common soft soil foundation treatment principle mainly includes compaction, replacement, solidification and drainage. The vibration sinking pipe extruding crushed stone pile method, referred to as the extruding pile method, is a foundation treatment technology that uses a vibration pile sinking machine to sink a pile pipe into the soil, then pours granular materials such as crushed stone into the pile pipe, and through vibration, pipe pulling and other operations, the crushed stone forms a dense crushed stone pile in the pile hole, which together with the soil between the piles forms a composite foundation, thereby improving the bearing capacity of the foundation and reducing the settlement. The grouting method is a foundation treatment technology that uses solidification principle to reinforce, which fills the pores between particles and forms a solid by pressurizing the grout into the pores of the foundation soil, thereby improving the bearing capacity of the foundation.

[0003] The extruding pile method is affected by the crushed stone materials, and there is a risk of uneven filling caused by poor gradation, which affects the long-term stability of the foundation. The combination of grouting method and extruding pile method can effectively complement each other, form a more solid cement crushed stone pile, and effectively improve the bearing capacity of the foundation and reduce the settlement of the foundation. SUMMARY

[0004] Therefore, the utility model provides a kind of ground reinforcement equipment of collaborative vibration sinking pipe extruding crushed stone pile method and grouting method, to solve the above technical problem.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A kind of ground reinforcement equipment of collaborative vibration sinking pipe extruding crushed stone pile method and grouting method, comprising:

[0007] The outer pile pipe has a filler port at the top, and the bottom end of the outer pile pipe has a plurality of flap pile tips, and the plurality of flap pile tips form a sharp structure.

[0008] The inner pile pipe is arranged inside the outer pile pipe, and the inner pile pipe has a grouting hole on the pipe wall.

[0009] The vibration hammer is arranged at the top end of the outer pile pipe.

[0010] Through the technical scheme, the utility model discloses the combination of extruded pile method and grouting method, gives full play to the advantage of two methods. Vibration sinking pipe extruded gravel pile method is through vibration and is sunk into the ground soil body, extrudes the surrounding soil body, makes the soil body dense, improves the foundation bearing capacity, and grouting method is through slurry filling soil body pore, further enhances the soil body strength and stability. Utilize vibration hammer cooperation outer layer pile pipe and fast sinking into the ground soil, and the construction speed is fast, is applicable to various foundation types. The compact equipment structure, the function integration, reduced the type and construction procedure of construction equipment, reduced the construction cost.

[0011] Preferably, in the above-mentioned foundation reinforcement equipment combining vibration sinking pipe extruded gravel pile method and grouting method, the top of the outer layer pile pipe is provided with an ultrasonic depth sensor. The ultrasonic depth sensor can monitor the depth of the outer layer pile pipe sinking into the foundation in real time, ensure the construction accuracy, and avoid foundation treatment problems caused by insufficient or excessive depth. The sensor data can be fed back to the control center to realize automatic control, improve the construction efficiency and quality, reduce the error and labor intensity of manual depth measurement, and improve the safety and reliability of construction.

[0012] Preferably, in the above-mentioned foundation reinforcement equipment combining vibration sinking pipe extruded gravel pile method and grouting method, a shock absorber is installed in the middle of the outer layer pile pipe. The shock absorber can effectively absorb and weaken the vibration generated during construction, reduce the disturbance to the surrounding buildings and foundation, and avoid causing uneven settlement. Ensure that the outer layer pile pipe maintains verticality and pile position accuracy during sinking and pulling out, and improve the construction quality. Reduce the impact of vibration on the equipment itself, reduce the equipment failure rate, and prolong the service life.

[0013] Preferably, in the above-mentioned foundation reinforcement equipment combining vibration sinking pipe extruded gravel pile method and grouting method, a pressure sensor is installed at the lower part of the inner layer pile pipe. The pressure sensor can monitor the pressure change in the grouting process in real time, ensure that the grouting pressure is within a reasonable range, and avoid uneven grouting or equipment damage caused by excessive or insufficient pressure. According to the pressure feedback, the grouting parameters can be adjusted in time to ensure that the slurry is uniformly injected into the soil pores, improve the foundation reinforcement effect, prevent safety accidents caused by abnormal grouting pressure, and improve the construction safety.

[0014] Preferably, in the above-mentioned foundation reinforcement equipment combining vibration sinking pipe extruded gravel pile method and grouting method, the flap pile tip is controlled to open and close by the hydraulic cylinder installed on the inner wall of the outer layer pile pipe. The hydraulic cylinder controls the opening and closing of the flap pile tip, which is flexible to operate and can be adjusted at any time according to the construction needs, avoiding adverse effects on the extruded foundation soil. Quickly open and close the flap pile tip, reduce the construction time, improve the construction efficiency. Avoid secondary disturbance to the foundation soil when pulling out the outer layer pile pipe, ensure the density and stability of the foundation soil.

[0015] Preferably, in the above-mentioned foundation reinforcement equipment for the collaborative vibration pipe sinking and gravel compaction pile method and grouting method, the top of the outer pile pipe and the inner pile pipe is provided with a locking and positioning mechanism, which limits the axial displacement of the outer pile pipe and the inner pile pipe. The locking and positioning mechanism can limit the axial displacement of the outer pile pipe and the inner pile pipe, ensure the stability of the pile pipe during construction, and avoid construction errors caused by displacement. It prevents the pile pipe from moving accidentally due to external forces during construction, improving the safety of construction. The design of the locking and positioning mechanism makes the installation and disassembly of the pile pipe more convenient, improving the convenience of construction.

[0016] Preferably, in the above-mentioned foundation reinforcement equipment for the collaborative vibration pipe sinking and gravel compaction pile method and grouting method, the grouting hole is a circular nozzle. The design of the circular nozzle makes the grout spray more uniform, with small flow resistance, and can better fill the soil pores. The nozzle is not convex or concave, which is conducive to the up and down movement of the grouting pipe, and can also prevent the grout from blocking or flowing poorly at the nozzle. The nozzle diameter is determined according to the grouting amount, grouting pressure and stratum characteristics, further optimizing the grouting effect.

[0017] Preferably, in the above-mentioned foundation reinforcement equipment for the collaborative vibration pipe sinking and gravel compaction pile method and grouting method, the outer pile pipe is a steel pipe. Steel pipe has high strength and good compression resistance, can withstand larger construction load, and ensures the stability of the outer pile pipe during sinking and pulling out. Steel pipe is wear-resistant and corrosion-resistant, with long service life, reducing the frequency of equipment replacement and maintenance cost. The high strength and stability of the steel pipe provide a reliable guarantee for construction, improving the safety and reliability of construction.

[0018] Preferably, in the above-mentioned foundation reinforcement equipment for the collaborative vibration pipe sinking and gravel compaction pile method and grouting method, the inner wall of the inner pile pipe is provided with a corrosion-resistant layer. The corrosion-resistant layer can effectively prevent the corrosion of the grouting liquid to the inner wall of the inner pile pipe, prolonging the service life of the inner pile pipe. The corrosion-resistant layer ensures the quality and performance of the grouting liquid during transportation, avoiding contamination or deterioration of the grouting liquid caused by corrosion. Reducing the frequency of equipment repair and replacement due to corrosion reduces construction cost.

[0019] Through the above technical solutions, compared with the prior art, the utility model discloses a kind of collaborative vibration pipe sinking and gravel compaction pile method and grouting method foundation reinforcement equipment, with the following beneficial effects:

[0020] 1. By using the compaction pile to preliminarily compact the soil, the pore structure of the soil is changed, and the soil pores are more uniform. Then grouting is carried out, and the grout can flow and settle more uniformly in the compacted soil pores, effectively solving the problem of uneven reinforcement effect.

[0021] 2. By rationally designing the depth and spacing of the compaction piles, as well as parameters such as grouting pressure, flow rate, and grouting time, the reinforcement depth and range can be effectively controlled.

[0022] 3. After compaction pile construction, grouting is used to reinforce the pile body and the soil between the piles. The injected grout can penetrate into the pores between the particles, forming a more uniform filling, improving the quality of the pile body, and also enhancing the strength of the soil between the piles. In this way, the pile and the soil between the piles form a whole through the filling effect of the grout, working together better to share the load from the superstructure.

[0023] 4. Improve the bearing capacity of the foundation: The compaction piles themselves can bear part of the upper load, while compacting the soil. The injected grout penetrates into the soil pores, filling the pores that may have been empty before, further improving the strength of the soil, and tightly connecting the piles and the soil between the piles, enabling the foundation to withstand greater loads.

[0024] 5. Enhanced foundation stability: Compaction piles alter the stress state of the soil, increasing its shear strength. Simultaneously, the injected grout fills the soil pores, improving its resistance to liquefaction and seepage.

[0025] 6. Wide range of applications: This device is suitable for various foundation types and has a good reinforcement effect on foundations of different soil types such as sand, silt, and silty clay. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 The attached figure is a structural schematic diagram of the foundation reinforcement equipment for the synergistic vibration driven pipe compaction stone pile method and grouting method provided by this utility model;

[0028] Figure 2 The attached figure is a structural schematic diagram of the outer pile pipe provided by this utility model;

[0029] Figure 3 The attached figure is a structural schematic diagram of the inner layer pile pipe provided by this utility model.

[0030] in:

[0031] 1-Outer pile pipe; 2-Inner pile pipe; 3-Vibratory hammer; 4-Filling port; 5-Valve pile tip; 6-Grouting hole; 7-Ultrasonic depth sensor; 8-Shock absorber; 9-Pressure sensor. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0033] Referring to the drawings Figure 1 to the drawings Figure 3 The embodiment of the utility model discloses a kind of ground consolidation equipment of collaborative vibration pipe pile extrusion broken stone pile method and grouting method, comprising:

[0034] Outer pile pipe 1, outer pile pipe 1 top has filler port 4, the bottom end of outer pile pipe 1 has multiple flap pile tip 5, multiple flap pile tip 5 forms sharp structure;

[0035] Inner pile pipe 2, inner pile pipe 2 is arranged in the inner side of outer pile pipe 1, and grouting hole 6 is formed in the pipe wall of inner pile pipe 2;

[0036] Vibration hammer 3, vibration hammer 3 is arranged in the top end of outer pile pipe 1.

[0037] In the embodiment, vibration hammer 3 and outer pile pipe 1 are connected by the flange plate of the bottom of vibration hammer 3 and the flange plate of the outer wall of the top of outer pile pipe 1 with fastening bolt.

[0038] In order to further optimize the above technical solutions, the top of outer pile pipe 1 is equipped with ultrasonic depth sensor 7.

[0039] In order to further optimize the above technical solutions, shock absorber 8 is installed in the middle of outer pile pipe 1.

[0040] In order to further optimize the above technical solutions, pressure sensor 9 is installed in the lower part of inner pile pipe 2.

[0041] In order to further optimize the above technical solutions, flap pile tip 5 is controlled to open and close by hydraulic cylinder installed in the inner wall of outer pile pipe 1.

[0042] In order to further optimize the above technical solutions, the top of outer pile pipe 1 and inner pile pipe 2 has locking limiting mechanism, and locking limiting mechanism limits the axial displacement of outer pile pipe 1 and inner pile pipe 2.

[0043] In the embodiment, locking limiting mechanism is connected by the flange plate of the inner wall of the top of outer pile pipe 1 and the flange plate of the top of inner pile pipe 2 with fastening bolt, and connection is simple, and it is convenient to dismount.

[0044] In order to further optimize the above technical scheme, the grouting hole 6 is a circular nozzle. The slurry is evenly sprayed out, and the flow resistance is small. The nozzle is not convex or concave, which is beneficial to the up and down movement of the grouting pipe, and can also prevent the slurry from being blocked or flowing poorly at the nozzle. The diameter of the nozzle is determined according to the grouting amount, grouting pressure and stratum characteristics.

[0045] In order to further optimize the above technical scheme, the outer pile pipe 1 is a steel pipe.

[0046] In order to further optimize the above technical scheme, the inner wall of the inner pile pipe 2 has a corrosion-resistant layer.

[0047] The method of the cooperative vibration pipe sinking and compaction pile method and the grouting method of the foundation reinforcement equipment provided by the embodiment is first to sink the outer pile pipe 1 into the foundation soil by cooperating the vibration hammer 3 and the outer pile pipe 1; then open the flap pile tip 5, gradually pull out the outer pile pipe 1, and in the pulling out process, backfill the sand and stone through the filler port 4; after the outer pile pipe 1 is completely pulled out and the backfilling is completed, grouting is carried out through the inner pile pipe 2.

[0048] The design points of the embodiment are:

[0049] 1. Multi-functional integrated design: The device ingeniously combines the vibration pipe sinking and compaction pile method and the grouting method. First, the vibration pipe sinking and compaction pile method is used to preliminarily compact the foundation soil, change the pore structure of the soil, and improve the compactness of the soil, thereby creating favorable conditions for subsequent grouting. Then, the grouting method is used to inject the prepared slurry into the soil, further filling the soil pores and improving the strength and stability of the foundation soil.

[0050] 2. Multi-functional pile pipe design: The outer layer is a high-strength steel pipe used for hole forming and filler during compaction pile construction. The inner layer is provided with a grouting channel, and the channel wall is made of corrosion-resistant material to ensure smooth delivery of the slurry during grouting.

[0051] 3. Intelligent control system integrated design:

[0052] Sensor system:

[0053] A depth sensor is installed on the pile pipe of the compaction pile construction device to accurately measure the depth of the pile pipe driven into the foundation.

[0054] Pressure sensors are arranged along the grouting pump and grouting pipe in the grouting part to monitor the grouting pressure in real time.

[0055] Data acquisition and transmission module:

[0056] A data acquisition unit is designed to collect depth, pressure and other data obtained by the sensor system in real time, and transmit these data to the control center through wired (such as optical fiber) or wireless (such as 4G / 5G communication module) mode.

[0057] Intelligent control unit:

[0058] According to the preset construction process and rules, the intelligent control unit can realize automatic sequential control of the compaction pile construction and the grouting construction. When the compaction pile construction is completed, the grouting equipment is automatically started, and the grouting parameters are adjusted according to the previously collected soil data.

[0059] Based on the collected data, the built-in control algorithm is used to automatically adjust the compaction pile construction parameters (such as pile pipe lifting speed) and the grouting parameters (such as grouting pressure).

[0060] The embodiment is a composite pile pipe. The outer layer is made of high-strength steel material, which is used for sinking and backfilling sandstone. The pile pipe is sunk into the foundation soil by starting the vibration hammer 3 to form a hole, and the outer steel pipe is slowly pulled out when filling. After the filler is layered and compacted, the inner grouting pipe is enabled, the inner wall of the pipe is made of corrosion-resistant material, and the slurry is injected into the grouting pipe by the grouting pump to the nozzle for high-pressure jetting to realize the reinforcement of the foundation soil.

[0061] Specifically, the vibration hammer 3 is first started to sink the pile pipe into the foundation soil to form a hole by compacting the underground soil layer. The filling port 4 is designed at the uppermost end of the entire pile pipe to enable the pile pipe to sink to the maximum depth. In the process of sinking the pile pipe into the foundation, the ultrasonic depth sensor 7 installed on the upper part of the outer pipe monitors the depth of the pile pipe sinking into the ground in real time and feeds back to the control center. When the pile pipe sinks to near the designed depth, the control center controls the pile pipe to continue sinking at a lower speed to reach the target. During the hole sinking process, the pile pipe compacts the soil layer transversely, and the surrounding foundation soil is subjected to horizontal compaction, so that the soil within a certain range around the pipe is displaced in horizontal directions, reducing the porosity and improving the compactness. After compaction, the flap pile tip 5 is opened, and the outer steel pipe is slowly pulled out upwards, and sandstone is injected into the filling ports on both sides, filled into the hole through the pipe, and the pile pipe is pulled out while vibrating and filling sandstone, until the filling is completed.

[0062] The shock absorber 8 is installed on the outer pile pipe 1, which can effectively absorb and weaken the vibration generated by sinking and pulling out the pile pipe, ensuring the verticality and pile position accuracy, and also controlling the vibration amplitude transmitted to the surrounding buildings within a safe range.

[0063] The pipe for filling on both sides keeps the inner wall smooth to reduce the resistance of the backfilling material in the conveying process, avoid the accumulation and blockage of the backfilling material in the pipe, and make the backfilling material smoothly pass through the pipe into the pile hole, improving the conveying efficiency.

[0064] The flap pile tip 5 is slowly opened by the hydraulic cylinder to avoid adverse effects on the compacted foundation soil.

[0065] After the filling is completed, the vibration hammer 3 is removed, the grouting pump is connected to the inner layer grouting pipe, and the prepared grouting liquid is injected into the soil pores around the compaction pile through the grouting pipe by using the grouting pump. The prepared grouting liquid is poured into the liquid storage tank, and the grouting liquid is injected into the grouting pipe through the grouting pump. During the grouting process, the grouting pressure is monitored in real time by the grouting pressure sensor and fed back to the control center. If the grouting pressure suddenly rises or the grouting amount suddenly decreases, it may be that the grouting pipe is blocked or the soil pores are filled, so the control center will timely adjust the grouting parameters to make the grouting liquid uniformly enter the soil. After the grouting liquid injection is completed, a certain standing time is maintained to allow the grouting liquid to fully diffuse in the soil, so that the pile and the soil between the piles form a stable overall structure, and the bearing capacity and impermeability of the soil are improved.

[0066] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0067] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ground reinforcement apparatus that synergizes a vibro-replacement stone column method and a grouting method, characterized by, Comprise: An outer pile tube (1) with a filler port (4) at the top, and a plurality of valve pile tips (5) at the bottom end, which form a pointed structure; An inner pile tube (2) inside the outer pile tube (1), with grouting holes (6) on the tube wall; A vibration hammer (3) at the top end of the outer pile tube (1).

2. The ground reinforcement apparatus by the combined vibro-replacement stone column method and the grouting method according to claim 1, wherein The top of the outer pile tube (1) is equipped with an ultrasonic depth sensor (7).

3. The ground reinforcement apparatus of claim 1, wherein, The middle of the outer pile tube (1) is equipped with a shock absorber (8).

4. The ground reinforcement apparatus of claim 1, wherein, The lower part of the inner pile tube (2) is equipped with a pressure sensor (9).

5. The ground reinforcement apparatus of claim 1, wherein, The valve pile tip (5) is controlled to open and close by a hydraulic cylinder installed on the inner wall of the outer pile tube (1).

6. The ground reinforcement apparatus of claim 1, wherein, The top of the outer pile tube (1) and the inner pile tube (2) has a locking and limiting mechanism, which limits the axial displacement of the outer pile tube (1) and the inner pile tube (2).

7. The ground reinforcement apparatus of claim 1, wherein, The grouting hole (6) is a circular nozzle.

8. The ground improvement apparatus of claim 1, wherein, The outer pile tube (1) is a steel pipe.

9. The ground reinforcement apparatus of claim 1, wherein, The inner wall of the inner pile tube (2) has a corrosion-resistant layer.

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