CN115419060A - Air-entrapping auxiliary construction method for onshore gravel pile - Google Patents
Air-entrapping auxiliary construction method for onshore gravel pile Download PDFInfo
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- CN115419060A CN115419060A CN202211262532.3A CN202211262532A CN115419060A CN 115419060 A CN115419060 A CN 115419060A CN 202211262532 A CN202211262532 A CN 202211262532A CN 115419060 A CN115419060 A CN 115419060A
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- 238000010276 construction Methods 0.000 title claims abstract description 53
- 239000002689 soil Substances 0.000 claims abstract description 50
- 239000004575 stone Substances 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 21
- 239000007924 injection Substances 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000003860 storage Methods 0.000 claims description 22
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 13
- 230000002787 reinforcement Effects 0.000 description 9
- 239000011148 porous material Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/18—Placing by vibrating
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- General Engineering & Computer Science (AREA)
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- Agronomy & Crop Science (AREA)
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides an air-entrapping auxiliary construction method for an onshore gravel pile, which comprises the following steps: starting the pile sinking machine to sink the pile pipe into the soft soil foundation while vibrating, wherein the pile pipe penetrates through the soft soil foundation and enters the mucky soil layer until the pile pipe reaches the designed elevation, and then stopping the pile sinking machine; closing a sealing door at the top end of the pile pipe, and injecting gas into the pile pipe until a discharge hole at the bottom of the pipe pile is opened when the pressure in the pipe and the pressure outside the pipe are balanced; continuously injecting gas into the pile pipe to assist the discharge of broken stones in the pipe; and (5) adjusting the gas injection speed and then performing pile pipe drawing construction. According to the invention, gas is injected into the tubular pile in the tubular pile tube, so that the internal pressure of the tubular pile tube is increased, the external pressure in the tubular pile tube is balanced, and the discharge hole at the bottom of the tubular pile tube is opened to assist in discharging crushed stone through gas.
Description
Technical Field
The invention relates to the field of gravel pile construction, in particular to an air-entrapping auxiliary construction method for a land gravel pile.
Background
The foundation treatment methods include deep stirring method reinforcement, high-pressure jet grouting method, powder jet grouting method, compaction pile reinforcement, gravel pile reinforcement, lime pile reinforcement and the like, wherein the gravel pile reinforcement technology is one of the main foundation reinforcement means. In 1935, after a war factory workshop is built on soft soil deposited in a gulf in France, gravel piles are firstly adopted to reinforce a soft foundation, gravel pile reinforced sand foundations are sequentially widely applied to various countries in the world, and the application of gravel piles in China begins with the reinforcement of the soft foundation of a hull workshop of a Nanjing ship construction factory in 1977. Along with the generation and development of new construction methods and construction processes, the range of reinforcing the foundation by the gravel piles is continuously expanded, the foundations such as sandy soil, artificial filling soil, silt soil, cohesive soil (including saturated mucky soil) and the like can be reinforced by the gravel piles, and meanwhile, the types of the gravel piles are continuously increased.
With the rapid development of the economy of China, the soft soil foundation is required to be treated in most of various domestic engineering constructions. In the foundation treatment mode, the gravel pile has the advantages of simple construction, convenient operation, high construction speed, easy control of reinforcement quality and low foundation reinforcement cost, changes the drainage condition of the foundation after pile forming, accelerates the dissipation of hyperstatic pore water pressure during earthquake, is beneficial to earthquake resistance of the foundation and prevents soil body liquefaction, can accelerate the consolidation of soil among the piles, improves the strength and the like, and is widely adopted at home and abroad.
At present, the main pile type of the gravel pile is short (6-13 m), and aiming at the trend that domestic gravel pile construction gradually develops towards super-long (more than 20 m), the traditional onshore gravel pile construction process cannot meet the construction requirement of the super-long gravel pile, and in order to improve the applicability of the gravel pile and aim at the construction of the super-long gravel pile, an onshore gravel pile air-entrapping auxiliary construction method is specially provided.
Disclosure of Invention
The invention aims to provide an auxiliary gas filling construction method for a land gravel pile.
The technical scheme for realizing the purpose of the invention is as follows:
an auxiliary aerated construction method for an onshore gravel pile comprises the following steps:
starting the pile sinking machine to sink the pile pipe into the soft soil foundation while vibrating, wherein the pile pipe penetrates through the soft soil foundation and enters the mucky soil layer until the pile pipe reaches the designed elevation, and then stopping the pile sinking machine;
closing a sealing door at the top end of the pile pipe, and injecting gas into the pile pipe until a discharge hole at the bottom of the pipe pile is opened when the pressure in the pipe and the pressure outside the pipe are balanced; continuously injecting gas into the pile pipe to assist the discharge of broken stones in the pipe;
and (5) adjusting the gas injection speed and then performing pile pipe drawing construction.
In one possible implementation, the gas injection rate is varied before the pressures inside and outside the tube are balanced;
after the pressure inside and outside the tube was equalized, the gas injection rate was constant.
In one possible implementation, the gas injection rate is constant after the pressure inside and outside the tube is balanced, comprising:
pressure in and outside the pipeAfter the force is balanced and before the construction of pile pipe drawing, the gas injection speed is V 1 ；
After the pile pipe is drawn out, the gas injection speed is V 2 ，V 1 ≥V 2 。
In one possible implementation, the gas is a high-pressure gas, which is produced by means of an air compressor.
In one possible implementation, the air compressor is arranged behind the pile machine construction platform;
the air compressor is connected with the air storage tank through a high-pressure air pipe, and high-pressure air generated by the air compressor is conveyed to the air storage tank;
and conveying the gas in the gas storage tank to the pile pipe.
In a possible implementation mode, the gas storage tank is arranged behind a construction platform of the stone breaking pile machine, two gas valves which are one inlet and one outlet are arranged on the gas storage tank, and the gas storage tank is responsible for storing high-pressure gas produced by the air compressor.
In one possible implementation, the air storage tank is communicated with the pile pipe through three air pipes;
the three air pipes are respectively communicated with the top, the middle and the bottom of the pile pipe. Three air pipes are attached to the outer wall of the pile pipe.
In one possible implementation, the gas injection rate is variable, including:
the velocity of gas injected through the gas pipe at the bottom of the pile pipe is V 01 ，V 01 ＞V 02 ；
The velocity of gas injected through the gas pipe in the middle of the pile pipe is V 02 ，V 02 ＞V 03 ；
The velocity of gas injected through the gas pipe at the top of the pile pipe is V 03 ，V 03 ＜1/2V 01 。
The invention aims to solve the problems that the pressure of pore water in the soil body at the pile tip position is very high when the pile pipe is sunk, in addition, the vibration disturbs the soil body in the pile sinking process, the liquefaction of the soil body is accelerated, and in order to ensure the treatment effect of a soft soil foundation, the speed of injecting high-pressure gas into the gas pipe at the bottom of the pile pipe is increased, so that the balance between the pressure at the bottom of the pile pipe and the pressure of the pore water can be ensured, the smooth discharging in the pile pipe can be ensured, and the pressure can be quickly supplemented to the bottom of the pile pipe after the discharging so as to continuously maintain the balance.
The speed of gas injected into the middle of the pile pipe is higher than that of the top of the pile pipe but lower than that of the bottom of the pile pipe, so that the gas in the middle of the pile pipe exerts a downward force on the bottom of the pile pipe to accelerate broken stones in the pile pipe to flow out; in addition, the speed of the gas injected into the top of the pile pipe is reduced so as to slow down the flow speed of broken stones between the middle of the pile pipe and the top of the pile pipe, along with the outflow of broken stones at the bottom of the pile pipe, the broken stone pore space between the middle of the pile pipe and the bottom of the pile pipe is larger and larger, and the gas injected into the middle of the pile pipe can flow to the bottom of the pile pipe quickly, so that the supplement of the gas at the middle of the pile pipe to the gas at the bottom of the pile pipe is realized.
In one possible implementation, starting the pile driver to sink the pile tube into the soft soil foundation while vibrating, includes:
the bottom of the pile pipe, the middle of the pile pipe and the top of the pile pipe are respectively connected with an air pipe;
after Chen Zhuangji is started, three air pipes are sunk into the soft soil foundation together with the pile pipe.
In one possible implementation mode, the air pipes at the bottom, the middle and the top of the pile pipe are all fixed with the outer wall of the pile pipe;
the outer wall of the pile pipe is provided with a protective strip, and the air pipe is positioned between the protective strip and the outer wall of the pile pipe.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, gas is injected into the tubular pile in the tubular pile tube, so that the internal pressure of the tubular pile tube is increased, the external pressure in the tubular pile tube is balanced, and the discharge hole at the bottom of the tubular pile tube is opened to assist in discharging crushed stone through gas.
Drawings
Fig. 1 is a flow chart of an air-entrapping auxiliary construction method for a land gravel pile provided by the disclosure.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for 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 particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; 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 creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
Referring to fig. 1, an embodiment of the present invention provides an air-entrapping auxiliary construction method for an onshore gravel pile, including: starting the pile sinking machine to sink the pile pipe into the soft soil foundation while vibrating, wherein the pile pipe penetrates through the soft soil foundation and enters the mucky soil layer until the pile pipe reaches the designed elevation, and then stopping the pile sinking machine; closing a sealing door at the top end of the pile pipe, and injecting gas into the pile pipe until a discharge hole at the bottom of the pipe pile is opened when the pressure in the pipe and the pressure outside the pipe are balanced; continuously injecting gas into the pile pipe to assist the discharge of broken stones in the pipe; and (5) adjusting the gas injection speed and then performing pile pipe drawing construction.
In practical application, the sealing door is used as a feeding hole for sealing in the gas filling process and is controlled by a hydraulic pull rod. In the embodiment of the invention, gas is added into the pile pipe through the gas-filling auxiliary facility. The air-entrapping auxiliary facility comprises an air compressor, an air storage tank, an air pipe, a valve and a sealing door, high-pressure air is manufactured by the air compressor and stored in the air storage tank, the sealing door of a pile top feeding hole is closed before the pipe-removing construction of the gravel pile, the valve is opened, the high-pressure air is injected into the pile pipe through the air pipe, the pressure in the pipe is increased, and the construction purpose of auxiliary discharging is achieved.
According to the embodiment of the invention, the gravel pile is utilized to treat the soft soil foundation, the treatment depth needs to enter a muddy soil layer, the pore water pressure in the soil body at the original pile tip position is very high due to the lengthened pile length, and in addition, in the pipe sinking process of the gravel pile, the vibration has certain disturbance on the soil body, so that the liquefaction of the soil body is accelerated, the gravel discharge cannot be generally and smoothly discharged like a short pile type gravel pile, and in order to improve the construction quality of the gravel pile, the embodiment of the invention ensures the integrity of the pile body of the gravel pile construction and ensures the treatment effect of the soft soil foundation.
Because the super-long gravel pile is long, the pile is driven to the designed elevation by adopting a vibration immersed tube method, the disturbance to the soil body around the immersed tube is large, the soil body is seriously liquefied, and the position of a discharge port at the bottom is greatly stressed by water pressure. A plurality of pile tests are carried out on the early stage of the project, and the situation that no auxiliary blanking measure is adopted is found, the vibration pipe drawing is lifted by about 15m, and the broken stones begin to discharge. When the disposable pile tip is adopted for pile testing, the broken stones are not smoothly discharged due to the fact that the soil body is high in confining pressure and slow in discharging under the condition that the broken stones are not influenced by the pile tip.
The pile length is 25m, the saturation density rho =2.04 of a soil body is calculated according to the physical and mechanical performance indexes of soil provided by geological data, the pressure P applied to a material door at the bottom of the pipe is rho gh =0.5MPa, broken stones in the pipe are compacted through vibration due to the large slenderness ratio of a sinking pipe, the gravity of the broken stones alone cannot counteract the pressure of the soil body applied to the material door, so that the material outlet is difficult to open, and the discharge of the broken stones is not smooth.
Through the mode of adding gas into the pile pipe, the pressure in the pipe is improved, the internal pressure and the external pressure are balanced, the discharge port door at the bottom of the immersed pipe can be smoothly opened, and crushed stone discharge is assisted.
Based on the scheme, the gas injection speed is preferably changed before the pressure inside and outside the pipe is balanced; after the pressure inside and outside the tube was equalized, the gas injection rate was constant.
The air-entrapping auxiliary construction method for the onshore gravel pile is suitable for onshore gravel pile construction with reinforced depth of more than 20m in silt clay and silty clay strata with higher soil water content in soil layers.
Based on the above scheme, it is preferable that the gas injection speed is constant after the pressures inside and outside the tube are balanced, and the method comprises the following steps: after the pressure inside and outside the pipe is balanced and before the pipe drawing construction of the pile pipe, the gas injection speed is V 1 (ii) a After the pipe drawing construction of the pile pipe, the gas injection speed is V 2 ，V 1 ≥V 2 。
Based on the scheme, the preferable gas is high-pressure gas, and the high-pressure gas is manufactured by an air compressor.
Based on the scheme, the air compressor is preferably arranged behind the pile machine construction platform; the air compressor is connected with the air storage tank through a high-pressure air pipe, and high-pressure air generated by the air compressor is conveyed to the air storage tank; and conveying the gas in the gas storage tank to the pile pipe.
In practical application, the air compressor provided by the embodiment of the invention is arranged behind a pile machine construction platform and adopts 12m 3 The 75KW air compressor, plane size 2030 x 1300mm, pass through high-pressurepipe with the gas holder and be connected, be responsible for the production high-pressure gas and carry to the gas holder in. The gas storage tank provided by the embodiment of the invention is arranged behind a construction platform of the stone pile machine, is arranged close to an air compressor, is a cylindrical tank body with the diameter of 1.4m and the height of 2.9m, and can store high-pressure gas for 3m 3 The tank body is provided with an inlet air valve and an outlet air valve which are used for storing high-pressure gas produced by the air compressor. The air outlet of the air storage tank is provided with 4 vent valves, 3 connecting air pipes, 1 air escape valve (for air escape and pressure relief after construction), and the air valve is a DN32 manual ball valve, a pressure sensor and a pressure gauge. The air pipes of the embodiment of the invention are used for connecting the air valves and the pile pipes, 3 air pipes are arranged, and are respectively connected with the top, the middle part (the position that the bottom of the immersed pipe is upwards 10M) and the bottom (the position that the bottom of the immersed pipe is upwards 4M) of the immersed pipe, and the air pipes are connected with the top, the middle part and the bottom of the immersed pipe through M30X 1.5 threads by adopting steel pipes with the diameter of 4cm and the wall thickness of 4 mm.
Based on above-mentioned scheme, preferred gas holder arranges in the pile machine construction platform rear of rubble, sets up one on the gas holder and advances one and go out two pneumatic valves, and the gas holder is responsible for storing the high-pressure gas by the production of air compressor ware.
Based on the scheme, the air storage tank is preferably communicated with the pile pipe through three air pipes;
the three air pipes are respectively communicated with the top, the middle and the bottom of the pile pipe.
Based on the above, it is preferable that the gas injection rate is varied, and the method includes:
the velocity of gas injected through the gas pipe at the bottom of the pile pipe is V 01 ，V 01 ＞V 02 ；
The velocity of gas injected through the gas pipe in the middle of the pile pipe is V 02 ，V 02 ＞V 03 ；
The velocity of gas injected through the gas pipe at the top of the pile pipe is V 03 ，V 03 ＜1/2V 01 。
The invention aims to solve the problems that the pressure of pore water in the soil body at the pile tip position is very high when the pile pipe is sunk, in addition, the vibration disturbs the soil body in the pile sinking process, the liquefaction of the soil body is accelerated, and in order to ensure the treatment effect of a soft soil foundation, the speed of injecting high-pressure gas into the gas pipe at the bottom of the pile pipe is increased, so that the balance between the pressure at the bottom of the pile pipe and the pressure of the pore water can be ensured, the smooth discharging in the pile pipe can be ensured, and the pressure can be quickly supplemented to the bottom of the pile pipe after the discharging so as to continuously maintain the balance.
The speed of gas injected into the middle of the pile pipe is higher than that of the top of the pile pipe but lower than that of the bottom of the pile pipe, so that the gas in the middle of the pile pipe exerts a downward force on the bottom of the pile pipe to accelerate broken stones in the pile pipe to flow out; in addition, the speed of the gas injected into the top of the pile pipe is reduced so as to slow down the flow speed of broken stones between the middle of the pile pipe and the top of the pile pipe, along with the outflow of broken stones at the bottom of the pile pipe, the broken stone pore space between the middle of the pile pipe and the bottom of the pile pipe is larger and larger, and the gas injected into the middle of the pile pipe can flow to the bottom of the pile pipe quickly, so that the supplement of the gas at the middle of the pile pipe to the gas at the bottom of the pile pipe is realized.
Based on above-mentioned scheme, preferably start pile driver with stake pipe edge vibration immerse soft soil foundation, include:
the bottom of the pile pipe, the middle of the pile pipe and the top of the pile pipe are respectively connected with an air pipe;
after Chen Zhuangji is started, three air pipes are sunk into the soft soil foundation together with the pile pipe.
Based on the scheme, the air pipes at the bottom, the middle and the top of the pile pipe are preferably fixed with the outer wall of the pile pipe; the outer wall of the pile pipe is provided with a protective strip, and the air pipe is positioned between the protective strip and the outer wall of the pile pipe.
According to the embodiment of the invention, gas is injected into the tubular pile, so that the internal pressure of the tubular pile is increased, the external pressure in the tubular pile is balanced, and the discharge hole at the bottom of the tubular pile is opened to assist in discharging crushed stone through gas. The embodiment of the invention can effectively assist in discharging crushed stones and solve the problem of difficult discharging of the super-long pile caused by large soil body confining pressure. The embodiment of the invention can control the air pressure through the air valve, is suitable for working conditions under different geology and pile length conditions, and has universality. According to the embodiment of the invention, the pipe drawing speed of the gravel pile can be increased by an air-entrapping auxiliary process on the premise of ensuring the quality of the pile body.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. An air-entrapping auxiliary construction method for a land gravel pile is characterized by comprising the following steps of:
starting a pile sinking machine to sink the pile pipes into the soft soil foundation while vibrating, wherein the pile pipes penetrate through the soft soil foundation and enter a mucky soil layer until the pile pipes reach the designed elevation, and then stopping the pile sinking machine;
closing a sealing door at the top end of the pile pipe, and injecting gas into the pile pipe until a discharge port at the bottom of the pipe pile is opened when the pressure in the pipe and the pressure outside the pipe are balanced; continuously injecting gas into the pile pipe to assist the discharge of broken stones in the pipe;
and (5) adjusting the gas injection speed and then performing pile pipe drawing construction.
2. The aerated auxiliary construction method of a ground gravel pile as claimed in claim 1, wherein the gas injection speed is varied before the pressures inside and outside the pipe are balanced;
after the pressure inside and outside the tube is equalized, the gas injection rate is constant.
3. The aerated supplementary construction method of a ground gravel pile as claimed in claim 2, wherein the gas injection speed is constant after the pressure inside and outside the pipe is balanced, comprising:
after the pressure inside and outside the pipe is balanced and before the pipe drawing construction of the pile pipe, the gas injection speed is V 1 ；
After the pipe drawing construction of the pile pipe, the gas injection speed is V 2 ，V 1 ≥V 2 。
4. An auxiliary gas-filling construction method for an onshore gravel pile as claimed in any one of claims 1 to 3, wherein the gas is high-pressure gas, and the high-pressure gas is produced by an air compressor.
5. The air-entrapping auxiliary construction method of the land gravel pile as claimed in claim 4, wherein an air compressor is arranged behind the pile machine construction platform;
the air compressor is connected with the air storage tank through a high-pressure air pipe, and high-pressure air generated by the air compressor is conveyed to the air storage tank;
and conveying the gas in the gas storage tank to the pile pipe.
6. The auxiliary construction method for aerating on land gravel pile according to claim 5, wherein the air storage tank is arranged behind the construction platform of the gravel pile machine, two air valves are arranged on the air storage tank, and the air storage tank is responsible for storing high-pressure air produced by the air compressor.
7. The aerated auxiliary construction method of the ground gravel pile as claimed in claim 5, wherein the gas storage tank is communicated with the pile pipe through three gas pipes;
the three air pipes are respectively communicated with the top, the middle and the bottom of the pile pipe.
8. The air entrainment auxiliary construction method for the onshore gravel pile of claim 1, wherein the pile driver is started to sink the pile pipe into the soft soil foundation while vibrating, comprising:
the bottom of the pile pipe, the middle of the pile pipe and the top of the pile pipe are respectively connected with an air pipe;
after Chen Zhuangji is started, three air pipes are sunk into the soft soil foundation together with the pile pipe.
9. The aerated auxiliary construction method of the onshore gravel pile as claimed in claim 8, wherein the air pipes at the bottom, the middle and the top of the pile pipe are all fixed with the outer wall of the pile pipe;
the outer wall of the pile pipe is provided with a protective strip, and the air pipe is positioned between the protective strip and the outer wall of the pile pipe.
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| CN202210900857 | 2022-07-28 |
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| CN115419060A true CN115419060A (en) | 2022-12-02 |
| CN115419060B CN115419060B (en) | 2024-07-12 |
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| CN102817359A (en) * | 2012-08-27 | 2012-12-12 | 河北建设勘察研究院有限公司 | Sealing device of receiving port and construction method of vibrating immersed tube type sand-gravel pile of muddy soft soil foundation via air pressure balance |
| CN207904903U (en) * | 2017-12-04 | 2018-09-25 | 汤湘军 | Down-hole hammer grouting behind shaft or drift lining prefabricating composite pile |
| CN110593250A (en) * | 2019-09-17 | 2019-12-20 | 中铁第五勘察设计院集团有限公司 | Foundation reinforcement method and foundation reinforcement system |
| CN216739568U (en) * | 2022-01-15 | 2022-06-14 | 温州振中基础工程机械科技有限公司 | Gas pressurization construction system for vibrating gravel pile |
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