CN102200016A - Method for injecting solid particles for long-term subsidence of shield tunnel in soft soil area - Google Patents
Method for injecting solid particles for long-term subsidence of shield tunnel in soft soil area Download PDFInfo
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- CN102200016A CN102200016A CN2010101336242A CN201010133624A CN102200016A CN 102200016 A CN102200016 A CN 102200016A CN 2010101336242 A CN2010101336242 A CN 2010101336242A CN 201010133624 A CN201010133624 A CN 201010133624A CN 102200016 A CN102200016 A CN 102200016A
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Abstract
The invention relates to a method for injecting solid particles for long-term subsidence of a shield tunnel in a soft soil area. The method comprises the following steps: producing solid particles, wherein the component of the solid particles is concrete or broken stones, and the particle size is less than 2 cm; and pressing the solid particles into the reserved holes on concrete segments through a conduit and a piston so as to inject the solid particles into the soil body. The method provided by the invention has an obvious effect in improving the strength of soil around the tunnel structure.
Description
Technical field
The present invention relates to a kind of method of controlling soft clay area shield tunnel long-term settlement, relate in particular to the method that the preformed hole on a kind of concrete pipe sheet injects.
Background technology
The long-term settlement of soft clay area shield tunnel is more serious in the prior art, and what generally adopt at present is the liquid slurry slip casting method.Its principle is that liquid slurry is injected in the soil body with certain pressure from the preformed hole of the concrete pipe sheet in tunnel, and purpose is filled the hole between the section of jurisdiction and the soil body, improves the intensity of the soil body, thereby reduces the long-term settlement in whole tunnel.But from the situation of reality, the sedimentation in liquid slurry slip casting method control tunnel has a lot of deficiencies, mainly is:
The slurries of liquid slip casting method have flowability, can cause big disturbance to the soil body behind the injection weak soil, have destroyed the intrinsic structural strength of the soil body, and control has detrimental effect to long-term settlement;
The slip casting principle of liquid slurry slip casting method is repeatedly, on a small quantity, evenly construction, time-consuming, the effort of construction;
The liquid slip casting method is not good enough to the control effect of long-term settlement.
Summary of the invention
The technical issues that need to address of the present invention have provided the method that a kind of soft clay area shield tunnel long-term settlement solid particle injects, and are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes by following steps:
Make solid particle; The composition of described solid particle is concrete or rubble; Particle diameter is less than 2cm;
By conduit and piston the preformed hole that solid particle is pressed on the concrete pipe sheet is injected in the soil body.
Compared with prior art, the invention has the beneficial effects as follows: obvious the intensity effect of improving the tunnel structure surrounding soil.
Description of drawings
Fig. 1 is the grain structure schematic diagram that adopts among the present invention;
Fig. 2 is the device structure schematic diagram that adopts among the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
In order to solve the problems of the technologies described above, the present invention realizes by following steps:
Make solid particle; The composition of described solid particle is concrete or rubble; Particle diameter is less than 2cm;
By conduit and piston the preformed hole that solid particle is pressed on the concrete pipe sheet is injected in the soil body;
The composition of described concrete particle is made up of silicate concrete, medium sand, lime and water; Wherein the quality proportioning is: 176 kilograms of cement, 400 kilograms in water, 67 kilograms in lime, 200 kilograms of medium sands; The compressive strength of concrete particle is 2.5MPa;
Rubble is the commercial building material, and particle diameter is less than 2cm.
Above-mentioned raw materials market is all on sale.
Principle of the present invention: replace liquid slurry with solid particle, solid particle is rubble or concrete particle or the bead that particle diameter is not more than 2cm, as shown in Figure 1.By conduit and piston wherein solid particle is pressed in the soil body.Solid particle still injects by the preformed hole on the concrete pipe sheet, does not need to change the structure design of existing section of jurisdiction.
As shown in Figure 2: the instrument of solid particle method for implanting is a circular pipe 1, the metal material manufacturing, and its external diameter is 4.5cm (diameter of reserving orifice 4 is 5cm), and conduit thickness is 8mm, and internal diameter is 2.9cm, so the maximum size of the solid particle that injects is not more than 2cm.The length of conduit is 1.2m, and the length of piston depression bar 2 is 1.5m, and charging aperture 3 is located in the middle of being positioned at conduit.
The advantage of solid particle method for implanting of the present invention:
The solid particle that injects does not have flowability, and required injection rate is lacked than liquid slurry, thus to the disturbance of weak soil than little many of liquid, help the control of tunnel structure long-term settlement;
The strength ratio liquid slurry of soil body particle is a lot of greatly, and is obvious to the intensity effect of improving the tunnel structure surrounding soil;
After solid particle injects certain amount, because the intensity of the soil body is improved, thus in a very long time, need not to re-inject, and also the liquid slurry slip casting method needs on a small quantity, repeatedly injects, so solid particle injection worker method can be saved cost and time greatly.
Claims (2)
1. the method injected of a soft clay area shield tunnel long-term settlement solid particle, realize by following steps:
Make solid particle; The composition of described solid particle is concrete or rubble; Particle diameter is less than 2cm;
By conduit and piston the preformed hole that solid particle is pressed on the concrete pipe sheet is injected in the soil body.
2. the method that soft clay area shield tunnel long-term settlement solid particle according to claim 1 injects, wherein: the composition of described concrete particle is made up of silicate concrete, medium sand, lime and water; The quality proportioning is: 176 kilograms of cement, 400 kilograms in water, 67 kilograms in lime, 200 kilograms of medium sands; The compressive strength of concrete particle is 2.5MPa; Rubble is the commercial building material, and particle diameter is less than 2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101336242A CN102200016A (en) | 2010-03-26 | 2010-03-26 | Method for injecting solid particles for long-term subsidence of shield tunnel in soft soil area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101336242A CN102200016A (en) | 2010-03-26 | 2010-03-26 | Method for injecting solid particles for long-term subsidence of shield tunnel in soft soil area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102200016A true CN102200016A (en) | 2011-09-28 |
Family
ID=44660969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101336242A Pending CN102200016A (en) | 2010-03-26 | 2010-03-26 | Method for injecting solid particles for long-term subsidence of shield tunnel in soft soil area |
Country Status (1)
| Country | Link |
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| CN (1) | CN102200016A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226624A (en) * | 1998-11-17 | 1999-08-25 | 王继忠 | Method for reinforcement of foundation ground |
| CN2466348Y (en) * | 2001-01-17 | 2001-12-19 | 铁道部隧道工程局科学研究所 | Small bore rigid external valve one-way type sublevel grouting device |
| JP2006070453A (en) * | 2004-08-31 | 2006-03-16 | Hokuriku Eesukon Kogyo Kk | Filling confirmation implement for tunnel back-filling filler |
| JP2006342629A (en) * | 2005-06-10 | 2006-12-21 | Shimizu Corp | Means for filling filler into cavity, and method of filling the same |
| CN102182210A (en) * | 2011-03-18 | 2011-09-14 | 华侨大学 | Leakage repair method for impermeable layer of refuse landfill |
-
2010
- 2010-03-26 CN CN2010101336242A patent/CN102200016A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226624A (en) * | 1998-11-17 | 1999-08-25 | 王继忠 | Method for reinforcement of foundation ground |
| CN2466348Y (en) * | 2001-01-17 | 2001-12-19 | 铁道部隧道工程局科学研究所 | Small bore rigid external valve one-way type sublevel grouting device |
| JP2006070453A (en) * | 2004-08-31 | 2006-03-16 | Hokuriku Eesukon Kogyo Kk | Filling confirmation implement for tunnel back-filling filler |
| JP2006342629A (en) * | 2005-06-10 | 2006-12-21 | Shimizu Corp | Means for filling filler into cavity, and method of filling the same |
| CN102182210A (en) * | 2011-03-18 | 2011-09-14 | 华侨大学 | Leakage repair method for impermeable layer of refuse landfill |
Non-Patent Citations (1)
| Title |
|---|
| 孙会刚: "软土地基处理的方法及注意事项", 《科技信息》 * |
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Application publication date: 20110928 |