CN101509264A

CN101509264A - One-step pore-creating, segmenting high pressure cement grout construction method

Info

Publication number: CN101509264A
Application number: CNA2009101196564A
Authority: CN
Inventors: 李旺雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-25
Filing date: 2009-03-25
Publication date: 2009-08-19
Anticipated expiration: 2029-03-25
Also published as: CN101509264B

Abstract

An one-time pore-creating and subsection high pressure cement injection construction method, and the biggest characteristic of the method is that drainage pocket type mud jacking block mode is developed and applied and fine sand pocket is provided with filtration loss function; the method also has some new characteristics that grout is stopped from passing, big grouting pressure difference can be borne, destroying by washing by high pressure water is possible, and the like, and the method is used for a grouting subsection packing blocker and a grouting grout-feeding separator; the following construction procedures of repeatedly installing a driller, repeatedly deepening drilling, repeatedly cleaning bottom of hole, repeatedly cleaning cement stones in the hole, repeatedly installing an orifice blocker and grout-feeding pipes in a lifting and lining hole, and the like can be eliminated; the method has the advantages of reducing a lot of assistant workload, increasing construction speed severalfold, greatly lowering over 10%-20% of construction cost and having huge economic effect.

Description

One-step pore-creating, segmenting high pressure cement grout construction method

Technical field

The present invention relates to the job practices of a kind of one-step pore-creating, segmenting high pressure cement grout.

Background technology

Very universal with cement consolidation by grouting ground, leak stopping and making cement grouted cut off wall, it is job practices commonly used now that stage-cementing is from top to bottom blocked in the aperture, and its flow process is: 1. open grout hole, finish the orifice tube that pre-buried aperture is blocked, wait to coagulate 24 hours.2. finish first section cementation (I) (I ₁Rigging up is finished first section grout hole boring → I ₂Inlet pipe → I in aperture obstruction and the hole is installed ₃With finish first section cementation → I than the grouting pressure of low pressure ₄Take out inlet pipe in aperture obstruction and the hole).3. finish second section cementation (II) (II ₁Rigging up, is finished second section grout hole boring → II at cement calculus in the cleaning bottom of hole ₂Inlet pipe → II in aperture obstruction, the hole is installed ₃Full hole section cementation → II ₄Take out inlet pipe in aperture obstruction, the hole) → 4. the 3rd section cementation (III) (repetition II ₁, II ₂, II ₃, II ₄Step).Can continue the plurality of sections construction until finishing the section grouting of whole hole.

Summary of the invention

One-step pore-creating, the flow process of segmenting high pressure cement grout method is from top to bottom:

1. boring once reaches grouting whole hole depth → 2. and installs 1 little progress slurry iron pipe, fine sand bag by grouting segmentation requirement advance to starch separator, drainage pocket type grouting segmentation packer and finish aperture drainage formula mud jacking anchoring and block in the hole, wait to coagulate more than 4 hours → 3. first section cementation (I ') (I ' ₁Control 1.0MPa following mud jacking pressure is pressed into the drainage pocket type grouting segmentation packing obstruction between first, second grout compartment, and mud jacking is more than 10 minutes → I ' ₂The control grouting pressure surpasses 1.5MPa, finishes grouting → I ' by the grouting technique requirement ₃Remove cement paste in the inlet pipe and get through the fine sand bag separator that destroys between first section inlet pipe and the second section inlet pipe with the 10MPa water under high pressure, make it no longer produce compartmentation) → 4. second section cementation (II ') (repeat I ' ₁, I ' ₂, I ' ₃Step).Can continue the plurality of sections construction until finishing the section grouting of whole hole.

The contrast Step II ₁, II ₂, II ₃, II ₄With step I ' ₁, I ' ₂, I ' ₃Two kinds of different job practices flow processs are as can be known: one, and the constructing operation step is simplified greatly, and back work amount and non-cutting time significantly reduce; They are two years old, the former is in the milk, and to block all be in the aperture, all there is the grouting problem that repeats in each grouting, being prone to fault and aperture in the hole blocks improving grouting pressure very sensitive, but there are not these problems in the latter, the grouting pressure of raising reality that can be bold during the grouting of deep hole section and the difficult hole internal fault that produces produce better the reinforcing and anti-seepage effect to the cementation meeting.

Description of drawings

Fig. 1 injected hole schematic diagram;

Fig. 2 inserts in injected hole and advances to starch iron pipe, fine sand bag and advance to starch separator, drainage pocket type grouting segmentation packer and finish schematic diagram after aperture drainage formula mud jacking blocks;

First section slip casting schematic diagram of Fig. 3;

Fig. 4 water under high pressure breaks through the schematic diagram behind the separator between first section and second section;

Second section slip casting schematic diagram of Fig. 5;

Fig. 6 final stage slip casting schematic diagram.

1 injected hole, 2 advance to starch iron pipe, and 3 aperture drainage formula mud jacking anchorings are blocked, 4 drainage pocket types grouting segmentation packer, 5 fine sand bags advance to starch separator, 6 pulp eyes, 7 segmentation packings are blocked.

The specific embodiment

(1) rig is once finished grout hole.

(2) install by grouting segmentation requirements that 1 little progress slurry steel pipe, fine sand bag advance to starch separator, drainage pocket type grouting segmentation packer in the hole, finish the aperture obstruction of grouting, treat with fixed attention more than 4 hours with drainage pocket type mud jacking anchoring obstruction mode.

(3) begin first section cementation from top to bottom, at first the drainage pocket type grouting segmentation packer that is pressed between first, second grout compartment with the following mud jacking pressure of 1.0MPa produces segmentation packing obstruction, and effectively producing the packing obstruction needs mud jacking more than 10 minutes.Then improve grouting pressure to more than the 1.5MPa, the bar on the generation cement paste puncture inlet pipe pulp eye enters grout compartment and begins cementation.

(4) first sections grouting finish, and use inlet pipe in the above water under high pressure scour hole of 10.0MPa immediately.Cement paste in the inlet pipe is all rinsed well, with water under high pressure fine sand bag separator is destroyed and get through, eliminate compartmentation, prepare second section cementation cement paste.

(5) second sections grouting.The grouting segmentation packer that the following mud jacking pressure of the same 1.0MPa of use is pressed between second, third grout compartment produces segmentation packing obstruction, then boosts above second section cementation of beginning more than the 1.5MPa.

(6) repeat (3), (4) method step, up to the cementation task of finishing whole hole section.

The maximum characteristics of this new method are, Application and Development drainage pocket type mud jacking block new technology and The fine sand bag has the leak-off effect, can stop cement mortar poor by also bearing big grouting pressure, Have concurrently again and can the new feature such as be destroyed by high pressure water washing, as grouting segmentation packing disabler and Grouting advances to starch separator, do not repeat rigging up in place, repeatedly add gun drilling, repeat cleaning bottom of hole, Repeat cement calculus in the cleaning bottom of hole, repeat to install the aperture disabler and work constructions such as pulling out in the hole pulp-inlet pipe Program is economized and have been subtracted a lot of back work amounts, becomes several times raising speed of application, significantly reduction Construction cost has great economic effect more than 10%～20%.

Claims

1, the job practices of a kind of one-step pore-creating, segmenting high pressure cement grout is characterized in that, comprises following construction sequence: the first step, and use rig once to finish grout hole; In second step, install by packer grouting requirements and to advance to starch separator and grouting segmentation packer between inlet pipe in the hole, grout compartment and the grout compartment, and finish the aperture obstruction of grouting; The 3rd step, begin first section cementation from top to bottom, at first carry out mud jacking, making the grouting segmentation packer between first and second grout compartments produce segmentation packing obstruction under the slurries pressure, then improve grouting pressure, make cement paste puncture bar on the inlet pipe pulp eye and enter grout compartment and begin cementation; The 4th step, after first section grouting finishes, use inlet pipe in the water under high pressure scour hole immediately, the cement paste in the inlet pipe is all rinsed well, and the separator destruction of advancing to starch between grout compartment and the grout compartment is got through; In the 5th step, repeat the 3rd, the 4th step, up to the cementation of finishing whole hole section.

2, job practices as claimed in claim 1 is characterized in that, the separator that advances to starch between grout compartment and the grout compartment is that the fine sand bag advances to starch separator, and grouting segmentation packer is a drainage pocket type grouting segmentation packer.

3, job practices as claimed in claim 1, the aperture that it is characterized in that being in the milk are blocked the anchoring of employing drainage formula mud jacking and are blocked.

As claim 1 or 2 or 3 described job practicess, it is characterized in that 4, in the 3rd step, at first carry out mud jacking, the slurries pressure of this moment is below the 1.0MPa.

As claim 1 or 2 or 3 described job practicess, it is characterized in that 5, in the 3rd step, then improve grouting pressure, the slurries pressure of this moment is more than the 1.5MPa.

As claim 1 or 2 or 3 described job practicess, it is characterized in that 6, in the 4th step, with inlet pipe in the water under high pressure scour hole, the pressure of water is more than the 10.0MPa.