CN1563672A

CN1563672A - PMS sludge prepn. method and its application in construction of sludge balance shield and pipe-jacking

Info

Publication number: CN1563672A
Application number: CNA2004100174438A
Authority: CN
Inventors: 赵国强; 周善国; 杨继范
Original assignee: Shanghai No2 Municipal Engineering Co Ltd
Current assignee: Shanghai No2 Municipal Engineering Co Ltd
Priority date: 2004-04-02
Filing date: 2004-04-02
Publication date: 2005-01-12
Anticipated expiration: 2024-04-02
Also published as: CN100504030C

Abstract

This is a preparing method of PMS mud and water paste and its application on the working of supporting pipe. Its features are: Use high polymer and positron glue to prepare PMS mud and water paste liquid. During this procession, to use soil mortar liquid separated grade by grade, in the mud paste mix PMS paste liquid and its assistant materials in proper time, and advance the six steps on the application.

Description

PMS muddy water slurry preparation method and its application in slurry balance shield and jacking construction

Technical field: the invention belongs to the technical field in slurry balance shield and the jacking construction, is a kind of slurry balance shield and the jacking construction application technology in underground driving.

Background technology:

Slurry balance shield and jacking construction, adopt line transportation to replace the track continuous excavation, accelerated underground driving speed, improve working conditions and construction environment, can stablize the excavation face preferably and prevent that ground is grand sunken, become current epoch-making shield structure and jacking construction new technology.But exist the place of many deficiencies in this muddy water system, difficult control, muddy water such as outstanding behaviours has that the discarded slurry discharge value is big, slurries index such as quality, proportion, viscosity handle that to take up an area of big, new pulp material consumption big etc.Cause serious environmental to pollute, be unfavorable for that it is relatively poor the complex situations strain capacity to occur in solving propelling in the face of complicated geological situation and raising fltting speed.Slurry shield enters hard viscosity layer, can the plugging phenomenon often take place, and can cause booster when serious, and shield structure or push-bench can not be advanced.

Summary of the invention:

The invention provides a kind of few discharging, easy to control, low solid phase, take up an area of less, low energy consumption, can accelerate fltting speed, reduce the mud waste, guarantee that the excavation face is stable, reduce the integrated cost of underground tunneling construction, help environmental protection, be fit to a kind of muddy water slurries and its technique for applying in Large Slurry Balance Shield and jacking construction of slurry balance shield and mire water equilibrium tube construction characteristic.

The technical scheme that the preparation method taked of PMS among the present invention (Polymer-MMH Shield buried tunneling Slurry System) muddy water slurries is:

Adopt high molecular polymer, swell soil and positive colloid, and operation according to the following steps:

(1) in agitator, adds clear water, and start shear pump;

(2) in the shear pump charging hopper, add synergy soil or activity and receive swell soil, and add large, medium and small molecule (1,500 ten thousand molecular weight, 1,200 ten thousand molecular weight, 1,000,000 molecular weight) high molecular polymer, and positively charged MMH positive colloid product;

(3) promptly made in 5～10 minutes can be standby for shear pump circulation.

High molecular polymer is a macromolecule polyacrylic acid salt.Comprise polyacrylic acid (acyl) amine, powerful quilt agent, compound ion type polyacrylic acid (acyl) salt; The positive colloid product is mixed metal hydroxides positive electricity solution (MixedMetal Hydroxide).

The application of PMS muddy water slurries of the present invention in slurry balance shield and jacking construction, the technical scheme of being taked is: native particle loaded fluid separates step by step, adds PMS slurries and operation according to the following steps in mud in good time:

(1) sends into front deck mud hydraulic pressure chamber by adding pressure handle muddy water;

(2) soil body that is got off by shield structure and the big knife cutting of push-bench mixes through the muddy water of stirring and front deck, forms high specific gravity muddy water;

(3) by sludge pump and pipeline high specific gravity muddy water is transported to muddy water disposal field, ground and carries out conventional muddy water processing;

(4) enter conventional muddy water treatment system;

(5) in slurry storing tank, add the PMS slurries and the slurry shield special treating agent that mix up and carry out the adjustment of muddy water performance:

(6) to enter pulp storage tank standby for an adjusted PMS slurries part, and a part enters to be adjusted groove and be transported to front deck muddy water compression chamber by slush pump.

Good effect behind enforcement the present invention:

Because PMS slurries system is main by high molecular polymer and positive colloid mainly, composition has synergy soil or activity to receive swell soil, macromolecule polyacrylic acid salt, positive colloid, powerful quilt agent, surfactant etc.It helps forming high-quality mud film (forming the fine and closely woven degree of mud film, pliability height) at the excavation face, obtained low funnel viscosity, high muddy water yield value (yield value), the mud film of better quality, make the muddy water stable performance not allow to be subject to the pollution of clay, silt and solubility salt etc., native slag and earth are not played peptizaiton, can keep the excavation face stable, and can prevent that clay from polluting muddy water, keep the stable of muddy water performance.

Implement to have solved few discharging, easy to control, low solid phase behind the present invention, take up an area of less, low energy consumption, accelerate fltting speed, improve mud system and in the muddy water treatment system, remove native slag, improve the service efficiency of solid control equipment, can reduce the mud waste, and then reduce the integrated cost of underground tunneling construction, and help environmental protection.

PMS muddy water system of the present invention is typically not disperse the muddy water system, and muddy water can keep low funnel viscosity, and good fluidity helps improving the transfer efficiency of muddy water.

The present invention makes slurry shield and jacking construction when normal driving state, because PMS muddy water can form the mud film fast on the excavation face, make the cutter head of cutterhead front portion cut the soil body that the cutterhead front has formed the mud film all the time, directly do not cut the soil body, therefore fltting speed is improved nearly 15%, the cutterhead torsional forces can reduce nearly 10%, the retaining wall effect of mud film has promptly reduced caving in of the top soil body, reduced the loss that simultaneous grouting slurry permeates again in the middle of the soil layer of upper strata, it is about 30% that the synchronous grouting amount reduces, and reduced engineering cost; Because the excavation face can form the mud film at any time, avoided the top surface settlement of excavation face, help the excavation face stable, suppress clay swell.PMS muddy water system can be controlled the discharging of dregs and useless slurry effectively, and plugging effect is fine, and PMS muddy water bulk properties is that environment is not polluted, and is a kind of good environment-friendly products.

Description of drawings:

Fig. 1, the technological process of PMS muddy water slurry preparation;

Fig. 2, PMS muddy water system application technology flow process in shield structure and jacking construction;

Fig. 3; PMS and clay form the polarization process of complex;

Fig. 4; PMS and clay form the process of complex: hydrogen bond connects.

Fig. 5, PMS and clay form the process of complex: the formation of hydration shell and the formation of complex.

Fig. 6, the formation of mud film;

Fig. 7, macromolecule polyalcohol polyacrylamide (code name PAM) molecular structural formula.

The specific embodiment:

PMS (full name: new type of polymer positive colloid shield structure muddy water system Polymer-MMH Shield buriedtunneling Slurry System), muddy water slurry preparation method is: add clear water 5 in agitator 6, and startup shear pump 4, in the shear pump charging hopper, add synergy soil 1 or active sodium bentonite, and add large, medium and small high molecular polymer 2, and positively charged MMH positive colloid product 3, the shear pump circulation was promptly made in 5～10 minutes can be standby.See Fig. 1, high molecular polymer is a macromolecule polyacrylic acid salt, comprises polyacrylic acid (acyl) amine (structural formula is seen Fig. 7), powerful quilt agent, compound ion type polyacrylic acid (acyl) salt.The MMH positive colloid is mixed metal hydroxides solution (Mixed Metal Hydroxide).

The application of MPS muddy water slurries in slurry balance shield and jacking construction is to carry out according to the following steps: send into preceding upper-deck cabin mud hydraulic pressure chamber 11 by adding pressure handle muddy water, when shield driving, the soil body 13 that is got off by big knife cutting mixes through the muddy water of stirring and front deck 11, form high specific gravity muddy water, by sludge pump and pipeline, high specific gravity muddy water is transported to muddy water disposal field, ground, carrying out conventional muddy water treatment system 12 processing (is separated by the one-level vibrosieve, diameter is worked energetically the 0.42mm soil particle and is sent into and pile up the slag field, the surplus secondary desander that enters separates again, diameter enters the storage slag bath greater than 0.127 particle, a part enters the desander slurry storing tank and waits in processing, surplusly enter three grades of centrifuges, diameter enters the storage slag bath greater than the soil particle of 0.05mm, the surplus slurry storing tank that enters): add the MPS slurry 10 that mixes up and add slurry shield special treating agent 8 in slurry storing tank 7 and carry out the adjustment of muddy water performance, it is standby that an adjusted PMS slurries part is stayed slurry storing tank 7, and a part is directly delivered to adjustment groove 9 and seen Fig. 2.Every liter of river adds the PMS slurries and is no more than 20 grams.The PMS slurries adopt large, medium and small molecule high molecular polymer and positively charged MMH positive colloid product 3.High molecular polymer by the formed muddy water of the soil body that big knife cutting is got off, carries out selective flocculation, and high-quality soil enters into muddy water, and roach separates by treatment system against the current.The MMH positive colloid can form complex with the physique soil in the muddy water, changes the flow performance of muddy water, improves the yield value of muddy water.

Fig. 3～Fig. 6 specifies and adopts synergy soil 1 (or active sodium bentonite), and high molecular polymer 2 and MMH positive colloid product 3 mix the concrete form that clear water constitutes PMS slurries and muddy water effect formation high-quality mud film, see Fig. 6.As the soil body 16 and the water 17 of filling in soil body hole, constitute muddy water 15 and muddy water 14 and mud film 18 that soil body hole forms.The visible polarization process Fig. 3 of their microcosmic mechanisms, hydrogen bond connecting mode Fig. 4 is with the film formed microstructure Fig. 5 of aquation.Fig. 7 is the molecular structural formula of macromolecule polyalcohol polyacrylamide.

Different soil properties prepare the enforcement prescription of the new slurry of different PMS:

Soil layer	The slurry balance shield special treating agent		??PMS	New stock tank	Clear water	Swell soil
Soil layer	The slurry balance shield special treating agent		??PMS	New stock tank	Clear water	Swell soil	Silt	????12.5kg	??350kg	??120m ³	????60m ³	??1250kg
The clay powder sand mixes layer		????8.3kg					Silt	????12.5kg
The clay powder sand mixes layer		????8.3kg	Argillic horizon		????25kg	??100kg

(above data are to be used for 11.22m shield structure)

According to the soil nature difference, prepare different PMS and newly starch, actual addition should be adjusted according to the muddy water performance variation.

Claims

1, the preparation method of PMS muddy water slurries is characterized in that: adopt high molecular polymer and positive colloid, and operation according to the following steps:

(1) in agitator (6), adds clear water (5), and start shear pump (4);

(2) in the shear pump charging hopper, add synergy soil (1) or activity and receive swell soil, and add large, medium and small molecule (1,500 ten thousand molecular weight, 1,200 ten thousand molecular weight, 1,000,000 molecular weight) high molecular polymer (2), and positively charged MMH positive colloid product (3);

(3) shear pump (4) circulation was promptly made in 5～10 minutes.

2, preparation method according to claim 1 is characterized in that: described high molecular polymer (2) is a macromolecule polyacrylic acid salt, comprises polyacrylamide acid amide, powerful quilt agent, compound ion type polypropylene salt.

3, preparation method according to claim 1 is characterized in that: described positive colloid product (3) is the positive electrosol of mixed metal hydroxides.

4, the application of a kind of PMS muddy water slurries in slurry balance shield and jacking construction, it is characterized in that: native particle loaded fluid separates step by step, adds PMS slurries and its auxiliary material and operation according to the following steps in mud in good time:

(1) sends into front deck muddy water compression chamber (11) by adding pressure handle muddy water;

(2) soil body (13) that is got off by the big knife cutting of shield structure mixes through the muddy water of stirring and front deck (11), forms high specific gravity muddy water;

(3) by sludge pump and pipeline high specific gravity muddy water being transported to muddy water disposal field, ground handles;

(4) enter conventional muddy water treatment system (12);

(5) in slurry storing tank (7), add the PMS slurries (10) and the slurry shield special treating agent JHTCT-1 (8) that mix up and carry out the performance adjustment;

(6) to enter pulp storage tank standby for an adjusted PMS slurries part, and a part enters front deck muddy water compression chamber (11) through adjusting bucket (9).

5, the application of PMS slurries according to claim 4 in slurry shield is characterized in that: described adding PMS slurries are that every liter of clear water adding PMS slurries are no more than 20 grams.

6, application according to claim 4 is characterized in that: described in good time adding PMS slurries and its auxiliary material are that sand, clay powder sand, argillic horizon are added 60m respectively ³The slurry balance shield special treating agent of clear water, 100～350kgPMS, swell soil 1250kg and different amounts.

7, according to claim 4 or 6 described application, it is characterized in that: the described slurry balance shield special treating agent JHTCT-1 (8) that adds different amounts adds 12.5kg, clay powder sand adding 8.3kg, argillic horizon is added 25kg silt.

8, application according to claim 4, it is characterized in that: described to enter conventional muddy water treatment system be to be separated by the one-level vibrosieve, diameter is sent into mound slag field greater than the 0.42mm soil particle, the surplus secondary desander that enters separates again, diameter enters the storage slag bath greater than 0.127 soil particle, and a part enters the desander slurry can and waits for and handling, and surplusly enters three grades of centrifuges, diameter enters the storage slag bath greater than the soil particle of 0.05mm, the surplus slurry storing tank that enters.