CN102535472B - Pored-tube filling and high-pressure impacting extruding grouting method - Google Patents

Pored-tube filling and high-pressure impacting extruding grouting method Download PDF

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Publication number
CN102535472B
CN102535472B CN201210049457.2A CN201210049457A CN102535472B CN 102535472 B CN102535472 B CN 102535472B CN 201210049457 A CN201210049457 A CN 201210049457A CN 102535472 B CN102535472 B CN 102535472B
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grouting
impact extrusion
hole
high pressure
pressure
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CN102535472A (en
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陈安重
周运东
卢贤伟
刘晓丰
舒王强
刘良平
胡大可
詹前波
潘江洋
曾祥喜
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PowerChina Zhongnan Engineering Corp Ltd
Hydrochina Zhongnan Engineering Corp
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Hydrochina Zhongnan Engineering Corp
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Abstract

The invention discloses a pored-tube filling and high-pressure impacting extruding grouting method. The grouting method is mainly suitable for performing the reinforcing and impermeable grouting treatment on poor geologic bodies, such as broken and soft geologic bodies. The grouting method comprises the following steps: before grouting, utilizing a quick curing material to fill a clearance between a grouted pore section and a grouted tube set; forming a three-dimensional sealing structure by a sealing body of the grouted section and a one-way high-pressure impacting extruding grouting head at the lower end of the grouted tube set; performing the in-situ high-pressure impacting extruding rotary lifting grouting from bottom to top in the grouted pore section; controlling a grouting process according to a unit grouting quantity Q(L/m) and a grouting impacting extruding pressure P(MPa); and analyzing a grouting effect according to a sequencing change value of a quantity-to- pressure ratio I (I=Q/P). According to the grouting method provided by the invention, the effective and uniform high-pressure impacting extruding, splitting and permeable grouting are performed on a grouted stratum, and the grouted structural body is high in strength, is excellent in durability and is economical and environment-friendly.

Description

The method of a kind of hole pipe packing, high pressure impact extrusion grouting
Technical field
The present invention relates to ground base enforcement and antiseepage and process grouting field, be specially the method for one " hole pipe packing, high pressure impact extrusion " grouting, be mainly applicable to the poorly plastid such as broken, soft to carry out underpin and antiseepage grouting treatment.
Background technology
There is the poorly plastid such as structure compresso-crushed zone what build to the family dam Dam dam foundation in China, is related to dam foundation stress deformation and seepage stability, is to family's dam Hydropower Project key technical problem.China adopts the techniques such as " conventional cementation ", " certain special chemical preparation " to carry out grouting treatment for constructing attrition crushing tape handling more at present.Because rock mass in structure compresso-crushed zone mostly is the characteristics such as fragmental texture, hole is trickle, intensity is lower, concrete castability is poor, conventional cementation effect is poor, and the problems such as the chemical grouting material feature of environmental protection, cost economy, structure durability, process complexity are given to apply and are brought certain impact.
Summary of the invention
The geological structure compresso-crushed zone rock mass Filling Characteristic existing to power station, the family dam dam foundation of building for China, the present invention aims to provide the method for one " hole pipe packing, high pressure impact extrusion " grouting, and the method is a kind of brand-new grouting technique that promotes perfusion based on the three-dimensional sealing of grouting grout outlet, the revolution of original position high pressure impact-extrusion type.Before grouting, first employing between grout hole section and grout pipe group is solidified to material soon and carry out packing, in the section of hole, packing body and grout pipe group lower end Unidirectional high-pressure impact extrusion grouting nozzle form three-dimensional enclosed construction, when grouting, in the section of hole, carry out original position high pressure impact extrusion revolution from bottom to top and promote perfusion, reach effective, uniform controlled high pressure impact extrusion, splitting and Permeation grouting are implemented in grouting stratum.
For achieving the above object, the technical solution used in the present invention is:
The method of a kind of " hole pipe packing, high pressure impact extrusion " grouting, is characterized in, comprises the steps:
1) carry out grout compartment boring, be lowered to grout pipe group, clear hole;
2) before grouting, employing between grout hole section and grout pipe group is solidified to material soon and carry out packing, the Unidirectional high-pressure impact extrusion grouting nozzle of grout compartment packing body and grout pipe group lower end forms three-dimensional enclosed construction;
3) while being in the milk, by described Unidirectional high-pressure impact extrusion grouting nozzle, under three-dimensional sealing condition, grout hole section is carried out to original position high pressure impact extrusion perfusion from bottom to top;
4) in filling process, according to the amount of the pouring into Q(L/m of unit) and grouting impact extrusion pressure P (MPa) turn round from bottom to top to promote and control, until whole grout compartment high pressure impact extrusion perfusion finishes; In filling process according to the amount of the pouring into Q(L/m of unit) and grouting impact extrusion pressure P (MPa) turn round from bottom to top promote control.
Further, in described filling process according to the amount of the pouring into Q(L/m of unit) and grouting impact extrusion pressure P (MPa) turn round from bottom to top to promote and control for the every revolution of grouting promotes certain distance x, according to P x>=P ifand Q x>=Q ifgrouting lifting standard judges and controls wherein P xfor grouting revolution promotes grouting impact extrusion pressure (MPa) value that certain distance x reaches, Q xfor promoting the certain distance x unit amount of pouring into (L/m) calculated value; P iffor designing minimum grouting impact extrusion pressure (Mpa) value, Q iffor designing the minimum amount of pouring into (L/m), for example, in the time that revolution lifting certain distance x is 0.1m, according to P 0.1>=P ifand Q 0.1>=Q ifgrouting lifting standard judges and controls wherein P 0.1for grouting revolution promotes grouting impact extrusion pressure (MPa) value that 0.1m reaches, Q 0.1for promoting 0.1m unit's amount of pouring into (L/m) calculated value; P iffor designing minimum grouting impact extrusion pressure (Mpa) value, Q iffor designing the minimum amount of pouring into (L/m).
As preferred version of the present invention, the boring of described grout compartment is subsection hole-drilling from top to bottom, described high pressure is greater than 3MPa, in filling process, according to the minimum grouting of design impact extrusion pressure P (Mpa) and the least unit amount of pouring into Q(L/m) requirement, turn round hoisting velocity judgement and control, according to above-mentioned steps 1) ~ 4) order circulate drill-pouring from top to bottom until complete full hole section high pressure impact extrusion grouting, the length of each grout compartment is 10m ~ 50m, more than mutually overlapping 1m between adjacent two grout compartments.Full hole section is carried out sealing of hole grouting after being in the milk.
Before grouting of the present invention, first employing between grout hole section and grout pipe group is solidified to material soon and carry out packing, refer to that grout compartment boring is carried out in segmentation from top to bottom according to borehole wall stability, before grouting, be first lowered to grout pipe group, pour into fast cure packing material, packing body and grout pipe group lower end Unidirectional high-pressure impact extrusion grouting nozzle form three-dimensional enclosed construction.
Described fast cure packing material, according to hole pipe one packing setting time and the requirement of packing material later strength, the fast cure material of one adopting.For ease of packing pouring construction, curing materials is divided into the first and second two components, and first component is mainly made up of sulphur aluminium clinker, stabilizing agent etc.; Second material is made up of gypsum, lime, flyash, stabilizing agent etc., and packing pouring construction pours into after adopting first and second liang of component equities to mix with water, water-solid ratio 1:1, and packing perfusion is after 1 hour, and compressive strength is greater than 0.5MPa.
When described grouting, in the section of hole, carry out original position high pressure impact extrusion revolution from bottom to top and promote perfusion, by the three-dimensional enclosed construction of packing body and the formation of grout pipe group lower end Unidirectional high-pressure impact extrusion grouting nozzle, grout hole section is carried out to original position impact extrusion revolution from bottom to top and promote perfusion, its pouring material can adopt Portland cement, grinding fine cement or superfine cement.Described impact type revolution promotes perfusion, adopts horizontal bar grout pump, produces " traffic congestion effect " by single-acting low-frequency high-voltage impact extrusion perfusion, reaches controlled high pressure impact extrusion, splitting and infiltration perfusion are implemented in stratum.
The structure of described Unidirectional high-pressure impact extrusion grouting nozzle is, comprises sealing top connection and starter, and described sealing top connection is connected by an one-way valve seat with starter; In described sealing top connection, there is hollow channel A; Described one-way valve seat is provided with slurry intake channel D and pulp channel C, and described slurry intake channel D is communicated with hollow channel A, and pulp channel C is communicated with slurries outlet; Between described one-way valve seat and starter, be provided with slurry channel B, this is crossed slurry channel B and is communicated with slurry intake channel D; In described pulp channel C, be provided with and realize pulp channel C and cross the unidirectional valve ball of starching channel B break-make.When having high pressure slurries through hollow channel A, slurry intake channel D, while entering slurry channel B, unidirectional valve ball is opened, high pressure slurries pour into stratum through pulp channel C and slurries outlet impact extrusion, on the contrary unidirectional valve ball weight drop closed valve seat, stable high voltage impact extrusion grouting energy.
Described unidirectional valve ball is abrasion-proof steel ball, and abrasion-proof steel ball is placed in the pulp channel C of one-way valve seat; Described one-way valve seat has U-shaped slurry intake channel D and pulp channel C, and described pulp channel C top is provided with technique and stops up.
The Unidirectional high-pressure impact extrusion grouting nozzle of described grouting group pipe lower end, it act as with packing body and forms three-dimensional enclosed construction, creates conditions for implementing original position high pressure impact extrusion grouting; The controlled high pressure impact extrusion slurry processed of unidirectional steel ball passes through successively stock inlet, hollow channel A, slurry intake channel D, crosses slurry channel B, pulp channel C, then pours into stratum from the unidirectional impact extrusion of grout outlet, stable high voltage impact extrusion grouting energy; The alloy sheet that Unidirectional high-pressure impact extrusion grouting nozzle welds is up and down lowered in not in place or grouting and carries and while being obstructed, turn round cleaning bottom of hole as grout pipe group.
According to " hole pipe packing, high pressure impact extrusion " grouting mechanism, the present invention proposes a kind of brand-new employing piezometric first than I(I=Q/P) method of carrying out grouting effect analysis.Described employing piezometric is than I(Q/P) carry out grouting effect analytical method, i.e. high pressure impact extrusion grouting effect should be followed with hole order encryption quanta pressure ratio I(I=Q/P) reduce, also: 1. encrypt with hole order, if the unit amount of pouring into is constant, impact extrusion grouting pressure improves; 2. encrypt with hole order, if impact extrusion grouting pressure is constant, the unit amount of pouring into reduces." hole pipe packing, high pressure impact extrusion " the last order of being in the milk hole piezometric ratio is 10-1.
The invention has the beneficial effects as follows: before grouting, first grout hole and grout pipe group are adopted and solidify soon material and carry out packing, grout compartment packing body and grout pipe group lower end Unidirectional high-pressure impact extrusion grouting nozzle form three-dimensional enclosed construction, when grouting, in the section of hole, carry out original position high pressure impact extrusion revolution from bottom to top and promote perfusion, in filling process according to the amount of the pouring into Q(L/m of unit) and grouting impact extrusion pressure P (MPa) turn round promote control, guarantee to reach grouting stratum is implemented effectively, high pressure impact extrusion uniformly, splitting and Permeation grouting, grouting structure intensity is high, good endurance, economic environmental protection, can be widely used in water power, municipal administration, railway, highway, bridge, the fields such as harbour are to fragmentation, soft grade is plastid underpin and antiseepage grouting treatment poorly.
Brief description of the drawings
Fig. 1 is the structure principle chart of an embodiment of the present invention;
Fig. 2 is the process chart of an embodiment of the present invention;
Fig. 3 is the structural representation of Unidirectional high-pressure impact extrusion grouting nozzle of the present invention;
Fig. 4 is the O-O sectional view of Fig. 3;
Fig. 5 adopts the front boring of " hole pipe packing, high pressure impact extrusion " of the present invention grouting core photo;
Fig. 6 checks boring core photo after adopting " hole pipe packing, high pressure impact extrusion " of the present invention grouting;
Fig. 7 adopts the rear compacted cementing core photo of " hole pipe packing, high pressure impact extrusion " of the present invention grouting.
In the drawings:
1-seals top connection; 2-starter; 3-one-way valve seat; 4-stops up;
5-grouting seal groove; 6-abrasion-proof steel ball; 7-dividing plate; 8-slurry outlet;
A-hollow channel; B-crosses slurry passage; C-pulp passage; D-slurry intake channel.
Detailed description of the invention
A kind of method that adopts " hole pipe packing, high pressure impact extrusion " as mentioned above grouting, concrete steps are:
(1) boring promotes and adopts full-hydraulic power head drill with grouting; Impact extrusion grouting should adopt special high-pressure (>=10MPa) single-cylinder single-acting grout pump, also can adopt at present domestic existing three cylinder high pressure grouting pumps to retain a plunger (shedding two plungers) and realize single-cylinder single-acting impact extrusion grouting, single impact extrusion amount 0.3-1L is advisable, impact extrusion frequency 30 times/min--100 time/min.
(2) drilling subsection is determined according to wall stability and equipment, facility ability, take full hole once hole or from top to bottom every 10m-50m as a grouting segment length.Grout hole aperture adopts Φ 75mm or Φ 91mm.Grout compartment carries out after having holed rinsing in hole, rinses and returns out clear water to aperture only.
(3) the double grout pipe that does of drilling rod that adopts Φ 50mm or Φ 54mm plain adapter to connect, connects the special Unidirectional high-pressure impact extrusion grouting nozzle with grouting groove under grout pipe group.As shown in Figure 3, described Unidirectional high-pressure impact extrusion grouting nozzle, it act as with packing body and forms three-dimensional enclosed construction, creates conditions for implementing original position high pressure impact extrusion grouting; The controlled high pressure impact extrusion slurry processed of unidirectional steel ball passes through successively stock inlet, hollow channel A, slurry intake channel D, crosses slurry channel B, pulp channel C, then pours into stratum from the impact extrusion of grout outlet one-way high-pressure, stable high voltage impact extrusion grouting energy; The alloy sheet that Unidirectional high-pressure impact extrusion grouting nozzle welds is up and down lowered in not in place or grouting and carries and while being obstructed, turn round cleaning bottom of hole as grout pipe group.
The material selection 40Cr of each parts of Unidirectional high-pressure impact extrusion grouting nozzle or 45# alloy steel, and carry out strict heat treatment; Described one-way valve seat adds the not chamfering of seat mouth of one-way valve seat 3 in man-hour, adopts unidirectional steel ball to coordinate chamfering with valve seat impact, to guarantee that one way valve is sealed and matched reliably when assembling.
While adopting the grouting of " hole pipe packing, high pressure impact extrusion " grouting technique, Unidirectional high-pressure impact extrusion grouting nozzle is connected in grout pipe group lower end, be lowered to front fastening each connector in grout hole, and check the sealing of steel ball and valve seat, after being in the milk, dismantle at every turn and rinse and one-way performance inspection.
(4) " hole pipe packing, high pressure impact extrusion " grouting is encrypted principle according to point order, general grouting point II order or the construction of III order.
(5) " hole pipe packing, high pressure impact extrusion " grouting process flow process is referring to accompanying drawing 2: " hole pipe packing, high pressure impact extrusion " grouting process flow chart.
(6) geological structure compresso-crushed zone, weak intercalated layer etc. poorly fixed the or antiseepage grouting treatment of plastid should adopt grinding fine cement or superfine cement slurries, and add appropriate modifier; Grout coordinate ratio can adopt 1:1,1.5:1 or 2:1, and according to stratum concrete castability choice for use.
(7) in filling process, according to the amount of the pouring into Q(L/m of unit) and grouting impact extrusion pressure P (MPa) turn round from bottom to top to promote and control, until whole grout compartment high pressure impact extrusion perfusion finishes; In described filling process according to the amount of the pouring into Q(L/m of unit) and grouting impact extrusion pressure P (MPa) turn round from bottom to top to promote and control, for the every revolution of being in the milk promotes 0.1m, according to P 0.1>=P ifand Q 0.1>=Q ifgrouting lifting standard judges and controls wherein P 0.1for grouting revolution promotes grouting impact extrusion pressure (MPa) value that 0.1m reaches, Q 0.1for promoting 0.1m unit's amount of pouring into (L/m) calculated value; P iffor designing minimum grouting impact extrusion pressure (Mpa) value, Q iffor designing the minimum amount of pouring into (L/m).
(8) grouting effect analysis can be according to piezometric than I(I=Q/P) a point order changing value carries out." hole pipe packing, high pressure impact extrusion " the last order of being in the milk hole piezometric ratio, generally can reach 10-1.
(9) the existing country of grouting quality standard Main Basis and Technical specifications and engine request are by design construction.Detection method for quality Main Basis designing quality Standard General adopts original state sampling, packer permeability test, physical prospecting test, mechanical test etc.
As shown in Figure 6, after grouting, compacted cementing core photo as shown in Figure 7 for inspection boring core photo after grouting.
The content that above-described embodiment is illustrated should be understood to these embodiment only for being illustrated more clearly in the present invention, limit the scope of the invention and be not used in, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the amendment of the various equivalent form of values of the present invention.

Claims (10)

1. " hole pipe packing, high pressure impact extrusion " grouting method, is characterized in that, comprises the steps:
1) carry out grout compartment boring, be lowered to grout pipe group, clear hole;
2) before grouting, employing between grout hole section and grout pipe group is solidified to material soon and carry out packing, the Unidirectional high-pressure impact extrusion grouting nozzle of grout compartment packing body and grout pipe group lower end forms three-dimensional enclosed construction;
3) while being in the milk, by described Unidirectional high-pressure impact extrusion grouting nozzle, under three-dimensional sealing condition, grout hole section is carried out to original position high pressure impact extrusion perfusion from bottom to top;
4) in filling process, according to the amount of the pouring into Q(L/m of unit) and grouting impact extrusion pressure P (MPa) turn round from bottom to top to promote and control, until whole grout compartment high pressure impact extrusion perfusion finishes; In filling process according to the amount of the pouring into Q(L/m of unit) and grouting impact extrusion pressure P (MPa) turn round from bottom to top promote control.
2. " hole pipe packing, high pressure impact extrusion " according to claim 1 grouting method, it is characterized in that, in described filling process according to the amount of the pouring into Q(L/m of unit) and grouting impact extrusion pressure P (MPa) turn round from bottom to top to promote and control for the every revolution of grouting promotes certain distance x, according to P x>=P ifand Q x>=Q ifgrouting lifting standard judges and controls wherein P xfor grouting revolution promotes grouting impact extrusion pressure (MPa) value that certain distance x reaches, Q xfor promoting the certain distance x unit amount of pouring into (L/m) calculated value; P iffor designing minimum grouting impact extrusion pressure (Mpa) value, Q iffor designing the minimum amount of pouring into (L/m).
3. " hole pipe packing, high pressure impact extrusion " according to claim 1 grouting method, is characterized in that, the boring of described grout compartment is subsection hole-drilling from top to bottom, and described high pressure is greater than 3MPa, in filling process, according to the minimum impact extrusion pressure P of being in the milk of design ifwith the least unit amount of pouring into Q ifrequirement, turns round hoisting velocity judgement and controls; According to step 1) ~ 4) the order drill-pouring of segmentation circulation from top to bottom until complete full hole section high pressure impact extrusion grouting, and carry out the section sealing of hole grouting of full hole.
4. according to " hole pipe packing, the high pressure impact extrusion " grouting method one of claim 1 ~ 3 Suo Shu, it is characterized in that, the described material of solidifying is soon divided into the first and second two components, and first component comprises sulphur aluminium clinker, stabilizing agent; Second component comprises gypsum, lime, flyash, stabilizing agent; After first, second two component equities being mixed with water when packing pouring construction, pour into, water-solid ratio is 1:1, and packing perfusion is after 1 hour, and compressive strength is greater than 0.5MPa.
5. according to " hole pipe packing, the high pressure impact extrusion " grouting method one of claim 1 ~ 3 Suo Shu, it is characterized in that, the material of described perfusion is ordinary Portland cement, grinding fine cement or superfine cement.
6. " hole pipe packing, high pressure impact extrusion " according to claim 1 grouting method, it is characterized in that, the structure of described Unidirectional high-pressure impact extrusion grouting nozzle is, comprise sealing top connection (1) and starter (2), described sealing top connection (1) is connected by an one-way valve seat (3) with starter (2); In described sealing top connection (1), there is hollow channel (A); Described one-way valve seat (3) is provided with slurry intake channel (D) and pulp passage (C); Described slurry intake channel (D) is communicated with hollow channel (A), and pulp passage (C) is communicated with slurries outlets (8); Between described one-way valve seat (3) and starter (2), be provided with slurry passage (B), this is crossed slurry passage (B) and is communicated with slurry intake channel (D); In described pulp passage (C), be provided with and realize pulp passage (C) and the unidirectional valve ball of crossing slurry passage (B) break-make.
7. " hole pipe packing, high pressure impact extrusion " according to claim 6 grouting method, is characterized in that, described unidirectional valve ball is abrasion-proof steel ball (6), and abrasion-proof steel ball (6) is placed in the pulp passage (C) of one-way valve seat (3); Described one-way valve seat (3) has U-shaped slurry intake channel (D) and pulp passage (C), and described pulp passage (C) top is provided with technique and stops up (4).
8. " hole pipe packing, high pressure impact extrusion " according to claim 6 grouting method, is characterized in that, Unidirectional high-pressure impact extrusion grouting nozzle top has many grouting seal grooves (5), and top and the bottom of Unidirectional high-pressure impact extrusion grouting nozzle are equipped with alloy sheet.
9. " hole pipe packing, high pressure impact extrusion " according to claim 3 grouting method, is characterized in that, the length of each grout compartment is 10m ~ 50m, more than mutually overlapping 1m between adjacent two grout compartments.
10. according to " hole pipe packing, the high pressure impact extrusion " grouting method one of claim 1 ~ 3 Suo Shu, it is characterized in that, adopt piezometric than I(I=Q/P) carry out grouting effect analysis; Described piezometric is the impact extrusion grouting amount of the pouring into Q(L/m of unit than I) with impact extrusion grouting pressure P(Mpa) ratio Q/p; Described employing piezometric is than I(I=Q/P) carry out grouting effect analytical method and be, high pressure impact extrusion grouting is followed with hole order encryption quanta pressure ratio I(I=Q/P) reduce, that is: 1. encrypt with hole order, if the unit amount of pouring into is constant, impact extrusion grouting pressure improves; 2. encrypt with hole order, if impact extrusion grouting pressure is constant, the unit amount of pouring into reduces; " hole pipe packing, high pressure impact extrusion " the last order of being in the milk hole piezometric ratio is 10 ~ 1:1.
CN201210049457.2A 2012-02-29 2012-02-29 Pored-tube filling and high-pressure impacting extruding grouting method Active CN102535472B (en)

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CN106759250B (en) * 2017-01-23 2018-12-18 中国电建集团中南勘测设计研究院有限公司 Unfavorable geologic body grouting method under the conditions of a kind of pressure-bearing seepage flow
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CN102174818A (en) * 2011-03-25 2011-09-07 湖南宏禹水利水电岩土工程有限公司 Controlled impermeable leaking stoppage grout-extruding water-stopping technology of strong water permeable stratum of quaternary system

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GB2178092A (en) * 1985-07-11 1987-02-04 Joseph Edwards A method of and apparatus for grouting
CN1358904A (en) * 2001-11-09 2002-07-17 邓敬森 Chemical grouting method for consolidating foundation and lifting and levelling settlement paving
CN1419012A (en) * 2002-12-30 2003-05-21 李旺雷 Controlled cement grouting technology
CN101666234A (en) * 2009-10-09 2010-03-10 中铁二局股份有限公司 Fracture rock no-slurry-blocking wall compound grouting construction method
CN102174818A (en) * 2011-03-25 2011-09-07 湖南宏禹水利水电岩土工程有限公司 Controlled impermeable leaking stoppage grout-extruding water-stopping technology of strong water permeable stratum of quaternary system

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