CN105064385A - Construction method for composite grouting waterproof curtain - Google Patents
Construction method for composite grouting waterproof curtain Download PDFInfo
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- CN105064385A CN105064385A CN201510475082.XA CN201510475082A CN105064385A CN 105064385 A CN105064385 A CN 105064385A CN 201510475082 A CN201510475082 A CN 201510475082A CN 105064385 A CN105064385 A CN 105064385A
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Abstract
The invention relates to a construction method for a composite grouting waterproof curtain. The construction method includes the steps that periphery compaction grouting is constructed along the edge of a construction area to form a periphery compaction grouting curtain arranged on the edge of the construction area in a closed manner, and the periphery compaction grouting curtain goes deep into the bottom of a backfill layer; inner circumference compaction grouting is conducted in the construction area to form a closed inner circumference compaction grouting curtain, the inner circumference compaction grouting curtain goes deep into the bottom of the backfill layer, and a reserved space is arranged between the periphery compaction grouting curtain and the inner circumference compaction grouting curtain; and high-pressure jet grouting piles are constructed in the reserved space, wherein every two adjacent high-pressure jet grouting piles are meshed with each other. Compaction grouting is conducted on the two sides of preset positions of the high-pressure jet grouting piles through cement mortar, the high-pressure jet grouting piles are constructed after the cement mortar is solidified, the continuous and compact waterproof curtain is formed, the water prevention effect of the curtain is good, the construction speed is high, and cost is low.
Description
Technical field
The present invention relates to the realm of building construction, espespecially a kind of construction method of combined casting water-stop curtain.
Background technology
In construction work, port and waterway engineering and hydraulic engineering, the normal water-stop curtain that uses carries out obstruct control, to carry out engineering construction to underground water.Consult shown in Fig. 1, show the floor map of water-stop curtain in prior art.As shown in Figure 1, in the prior art, the combination water-stop curtain adopting the plain concrete pile 1 ' not adding reinforcing bar to add single high-pressure rotary jet grouting pile 2 ' to be engaged, plain concrete pile center line 10 ' is located at side of bordering on the sea, high-pressure rotary jet grouting pile center line 20 ' is located at Lin Keng side, and the spacing of two center lines is 700mm.The diameter of plain concrete pile 1 ' is 1000mm, and the center of circle spacing of adjacent two plain concrete piles 1 ' is 800mm.The diameter of high-pressure rotary jet grouting pile 2 ' is 800mm, and the center of circle spacing of adjacent two high-pressure rotary jet grouting piles 2 ' is 600mm.
But, permeability large in void content is strong, under influence of dynamic water geological conditions, the construction method of existing water-stop curtain often can not form effective enclosure space, and needs to expend higher expense and time, wasting manpower and material resources.
Summary of the invention
The object of the invention is to the defect overcoming prior art, a kind of construction method of combined casting water-stop curtain is provided, solve that prior art, permeability large in void content is strong, be difficult to be formed under the complex geological condition of influence of dynamic water and close good water-stop curtain, effective enclosure space can not be formed and carry out underground water intercepting the problem controlled.
The technical scheme realizing above-mentioned purpose is: provide the construction method of combined casting water-stop curtain to comprise:
Constructing peripheral compaction grouting in edge along works area, forms the peripheral compaction grouting curtain closed and be located in the edge of described works area, and described peripheral compaction grouting curtain is deeply to backfill layer;
In described works area, enclose compaction grouting in construction, form the close grouting curtain of interior confined pressure closed, the close grouting curtain of described interior confined pressure deeply, to backfill layer, is provided with a headspace between described peripheral compaction grouting curtain and the close grouting curtain of described interior confined pressure; And
To construct in described headspace high-pressure rotary jet grouting pile, be engaged between adjacent two described high-pressure rotary jet grouting piles.
The beneficial effect of the construction method of combined casting water-stop curtain of the present invention:
The construction method of combined casting water-stop curtain of the present invention forms combined casting water-stop curtain by high-pressure rotary jet grouting pile of constructing after compaction grouting of first constructing.For the condition of the geology large porosity in works area, strong, the large influence of dynamic water of permeability, first cement mortar is used to carry out compaction grouting in the both sides in high-pressure rotary jet grouting pile precalculated position, cement mortar is utilized to fill backfill layer space, to construct after cement mortar is solidified high-pressure rotary jet grouting pile, form water-stop curtain closely knit continuously, to block underground water, curtain water stop is effective, and cost is low, the duration is short.
The further improvement of the construction method of combined casting water-stop curtain of the present invention is, what peripheral compaction grouting curtain of constructing comprised peripheral compaction grouting curtain draws hole and compaction grouting, circulate carry out according to then construct next hole the mode of the position in a reserved hole of the position in a hole reserved behind construction hole in the hole of drawing of described peripheral compaction grouting curtain, form the hole at interval, compaction grouting in the hole at described interval, what return peripheral compaction grouting curtain of constructing in the position in Yu Liu hole again draws hole and compaction grouting, forms the peripheral compaction grouting curtain closed.
The further improvement of the construction method of combined casting water-stop curtain of the present invention is, what in construction, the close grouting curtain of confined pressure comprised the close grouting curtain of interior confined pressure draws hole and compaction grouting, circulate carry out according to then construct next hole the mode of the position in a reserved hole of the position in a hole reserved behind construction hole in the hole of drawing of the close grouting curtain of described interior confined pressure, form the hole at interval, compaction grouting in the hole at described interval, what return in the position construction in the reserved hole close grouting curtain of confined pressure again draws hole and compaction grouting, form the close grouting curtain of described interior confined pressure closed.
The further improvement of the construction method of combined casting water-stop curtain of the present invention is, after compaction grouting, expands and be engaged in described two adjacent holes.
The further improvement of the construction method of combined casting water-stop curtain of the present invention is, what described high-pressure rotary jet grouting pile of constructing comprised rotary churning pile draws hole and high-pressure rotary-spray, circulate carry out according to then construct next hole the mode of the position in a reserved hole of the position in a hole reserved behind construction hole in the hole of drawing of described rotary churning pile, form the hole at interval, in the hole inner high voltage churning at described interval, what return the position construction rotary churning pile in reserved hole again draws hole and high-pressure rotary-spray, forms described high-pressure rotary jet grouting pile.
The further improvement of the construction method of combined casting water-stop curtain of the present invention is, high-pressure rotary jet grouting pile also comprises and recharging.
The further improvement of the construction method of combined casting water-stop curtain of the present invention is, adjacent two described high-pressure rotary jet grouting pile occlusions.
The further improvement of the construction method of combined casting water-stop curtain of the present invention is, is engaged between described peripheral compaction grouting curtain and described high-pressure rotary jet grouting pile, is engaged between described high-pressure rotary jet grouting pile and the close grouting curtain of described interior confined pressure.
Accompanying drawing explanation
Fig. 1 is the floor map of water-stop curtain in prior art;
Fig. 2 is the floor map of combined casting water-stop curtain of the present invention;
Fig. 3 is the sequence of construction figure drawing hole of combined casting water-stop curtain of the present invention;
Fig. 4 is the construction process figure of combined casting water-stop curtain of the present invention;
Fig. 5 is the floor map of compaction grouting of constructing in combined casting water-stop curtain of the present invention;
Fig. 6 is the generalized section of compaction grouting of constructing in combined casting water-stop curtain of the present invention;
Fig. 7 is the floor map of high-pressure rotary jet grouting pile of constructing in combined casting water-stop curtain of the present invention;
Fig. 8 is the generalized section of high-pressure rotary jet grouting pile of constructing in combined casting water-stop curtain of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
The invention provides a kind of construction method of combined casting water-stop curtain, be described below in conjunction with the construction method of accompanying drawing to combined casting water-stop curtain of the present invention.
Consult Fig. 2, show the floor map of combined casting water-stop curtain of the present invention.Consult Fig. 6, show in combined casting water-stop curtain of the present invention the generalized section of compaction grouting of constructing.Consult the generalized section that Fig. 8 shows in combined casting water-stop curtain of the present invention high-pressure rotary jet grouting pile of constructing.Shown in composition graphs 2, Fig. 6 and Fig. 8, in the present embodiment, works area A manually fills out island, have backfill layer, backfill is for cutting into a mountain stone and grating is uneven, and the backfill layer void content of works area A is large, permeability is strong, influence of dynamic water is large, existing water-stop curtain technology often can not form effective enclosure space, curtain water stop effect is bad, needs the construction method adopting combined casting water-stop curtain of the present invention, comprising:
Constructing peripheral compaction grouting in edge along works area A, forms the peripheral compaction grouting curtain 1 closed and be located in the edge of works area, and peripheral compaction grouting curtain 1 is deeply to backfill layer 4;
In works area, enclose compaction grouting in A construction, form the close grouting curtain 2 of interior confined pressure closed, the close grouting curtain 2 of interior confined pressure deeply, to backfill layer 4, establishes a headspace B between peripheral compaction grouting curtain 1 and the close grouting curtain 2 of interior confined pressure; And
To construct in headspace B high-pressure rotary jet grouting pile 3, be engaged between adjacent two high-pressure rotary jet grouting piles 3.
The construction method of combined casting water-stop curtain of the present invention forms combined casting water-stop curtain by high-pressure rotary jet grouting pile of constructing after compaction grouting of first constructing.For the condition of the geology large porosity in the A of works area, strong, the large influence of dynamic water of permeability, first cement mortar is used to carry out compaction grouting in the both sides in high-pressure rotary jet grouting pile precalculated position, cement mortar is utilized to fill backfill layer space, to construct after cement mortar is solidified high-pressure rotary jet grouting pile, form water-stop curtain closely knit continuously, to block underground water, curtain water stop is effective, cost, duration contrast have clear superiority, the underground construction operations such as reclamation area are of great significance.Specifically, the construction method of combined casting water-stop curtain of the present invention, comprises the steps:
Consult Fig. 3, show the sequence of construction figure drawing hole of combined casting water-stop curtain of the present invention.Consult Fig. 4, show the construction process figure of combined casting water-stop curtain of the present invention.Shown in composition graphs 3 and Fig. 4, carry out preparation of construction, lay the equipment of compaction grouting.Measurement and positioning in the A of works area, the close injected hole position of impulse is preset at the edge along works area A, draws hole machine in place.With drawing after hole machine accomplishes fluently the first hole a1, carry brill, draw the predetermined position that hole machine is displaced to the 3rd hole a3 and make a call to the 3rd hole a3, then carry brill, draw the predetermined position that hole machine is displaced to the 5th hole a5 and make a call to the 5th hole a5, then carry brill, draw the predetermined position that hole machine is displaced to seven apertures in the human head a7 and make a call to seven apertures in the human head a7, so analogize until a sequence to draw hole complete.In the present embodiment, needing mixing cement mortar, drawing hole machine according to after a dozen modes of one accomplish fluently the hole of some, just can carry out the construction of compaction grouting.After the complete first hole a1 of same slip casting, move to the 3rd hole a3 slip casting, then move to the 5th hole a5 slip casting, then move to seven apertures in the human head a7 slip casting, until a sequence slip casting is complete.In other embodiments, draw hole machine and carry out mortar depositing construction again according to after a dozen modes of one accomplish fluently a peripheral collar aperture, can determine according to the situation in reality.
The predeterminated position returning the second hole a2 makes a call to the second hole a2, then carry brill, draw the predetermined position that hole machine is displaced to the 4th hole a4 and make a call to the 4th hole a4, then carry brill, draw the predetermined position that hole machine is displaced to the 6th hole a6 and make a call to the 6th hole a6, then carry brill, draw the predetermined position that hole machine is displaced to octal a8 and make a call to octal a8, so analogize until the close injected hole of two sequence impulses is complete, and compaction grouting of constructing, form one and close the peripheral compaction grouting curtain 1 being located in the edge of works area.Cleaning work is carried out after completion.Adopt this kind point close injected hole of two sequence impulses, the holes of beating can be prevented every a dozen modes of one by too near, draw the problem that collapse hole or perforation easily appear in power traction compaction grouting hole, hole.
Consult Fig. 5, show in combined casting water-stop curtain of the present invention the floor map of compaction grouting of constructing.Consult Fig. 6, show in combined casting water-stop curtain of the present invention the generalized section of compaction grouting of constructing.Shown in composition graphs 5 and Fig. 6, in the present embodiment, the aperture of drawing the hole that hole machine is laid is 150mm, and the degree of depth in hole is about 15m, wears backfill layer 4, tangent between adjacent holes.The space of establishing high-pressure rotary jet grouting pile 30 to be onstructed is stayed between peripheral compaction grouting curtain 1 and the close grouting curtain of interior confined pressure 2.Because compaction grouting utilizes higher pressure to pour into the larger cement mortar of concentration, the hole that when slip casting starts, the first filling of slurries is laid, then infiltrates the soil body hole near hole under larger pressure, the final stake occlusion formed.Along with soil layer pore water pressure raises extrusion soil, until there is shear crack, produce splitting, slurries are filling crack thereupon, forms slurry arteries and veins, makes to form new net dress cage construction in the soil body.Starch arteries and veins in forming process owing to occupying a part of space in the soil body, add soil layer inner pore permeate by slurries, thus the soil body is compacted, constitute new slurry arteries and veins composite foundation, improve intensity and the barrier performance of the soil body, have also been changed soil body physico-mechanical properties simultaneously, improve the bearing capacity of soft foundation.
Construct after peripheral compaction grouting curtain 1, in the A of works area, enclosed compaction grouting in construction, formed a close grouting curtain 2 of interior confined pressure closed, between peripheral compaction grouting curtain 1 and the close grouting curtain 2 of interior confined pressure, establish a headspace B.In construction, the close grouting curtain of confined pressure 2 adopts the mode of the peripheral compaction grouting curtain 1 of above-mentioned construction to carry out.
Consult Fig. 7, show in combined casting water-stop curtain of the present invention the floor map of high-pressure rotary jet grouting pile of constructing.Consult Fig. 8, show in combined casting water-stop curtain of the present invention the generalized section of high-pressure rotary jet grouting pile of constructing.Shown in composition graphs 2, Fig. 3, Fig. 4, Fig. 7 and Fig. 8, carry out the preparation of construction high-pressure rotary jet grouting pile 3, in headspace B, measurement and positioning needs the position of drawing hole of rotary churning pile, draws hole machine in place.What adopt during compaction grouting curtain 1 peripheral according to above-mentioned construction punches every a dozen modes of one, namely draw hole machine then construct next hole the mode of the position in a reserved hole of the position in a reserved hole behind a hole of constructing to circulate and carry out, thus form the hole at a sequence interval.Hole wears backfill layer 4 and deeply to rock stratum 5, carries brills, installation PVC casing after punching, and draw after hole machine beaten a sequence hole, high-pressure rotary-spray platform machine is in place, mixing cement paste, the hole laid is carried out to the construction of high-pressure rotary-spray.Then recharge, namely after construction high-pressure rotary-spray, the Surface Subsidence of cement paste, then supplementing water mud reaches design height.Recharge the construction of drawing hole and high-pressure rotary-spray of the rotary churning pile namely completing a sequence afterwards.Return again and draw hole and high-pressure rotary-spray in the position construction in reserved hole, thus complete high-pressure rotary jet grouting pile 3 of constructing in headspace B.Finally carry out completion cleaning.
In the present embodiment, the aperture of drawing hole of construction high-pressure rotary jet grouting pile 3 is 800mm, and utilize the high power of spraying to cut aperture filling concrete slurry thereupon during high-pressure rotary-spray, two adjacent high-pressure rotary jet grouting piles 3 of rear formation are engaged mutually, intersect overlapping 200mm, reach sealing object, the degree of depth is about 15m.The peripheral compaction grouting curtain 1 of final formation, to intersect between high-pressure rotary jet grouting pile 3 and the close grouting curtain 2 of interior confined pressure, thus reach good stagnant water effect.Water-stop curtain enclosure space C is formed in high-pressure rotary jet grouting pile 3.
In the present embodiment, high-pressure rotary jet grouting pile 3 of constructing is not less than 48 hours with the interval time of the peripheral compaction grouting curtain 1 of construction and the close grouting curtain 2 of interior confined pressure.The injecting paste material of compaction grouting is cement mortar, and cement mortar proportion is water: ash: sand=0.5:1:1 ~ 2 (cement mortar ratio can adjust according to field condition), and sand is fine sand; During construction, mortar should be first dense rear rare, and offshore place, the appropriate to the occasion employing underflow of high water mark, grouting pressure is not less than 2Mpa, and grouting amount controls according to field trial situation, grouting pressure 2MPa.The cement paste water/binder ratio 0.9 ~ 1.0 of high-pressure rotary jet grouting pile 3, water glass Be ' 35 ~ 41, modulus 2.8 ~ 3.0, Water glass content is 0.5 ~ 2% of cement weight.
During construction high-pressure rotary jet grouting pile 3, when slurry is not returned in churning sprayed construction aperture, churning drilling rod stops promoting, take not stop to add water glass and fine sand measure in hole, expulsion pressure is reduced to and is not more than 3Mpa simultaneously, until can stop above-mentioned measure when slurry is returned in aperture, then by normal process construction hoisting.When again occurring in churning lifting process not return slurry phenomenon, then repeat above-mentioned measure.
The beneficial effect of the construction method of combined casting water-stop curtain of the present invention is:
The present invention is directed to the condition of the geology large porosity in the A of works area, strong, the large influence of dynamic water of permeability, first cement mortar is used to carry out compaction grouting in the both sides in high-pressure rotary jet grouting pile precalculated position, cement mortar is utilized to fill backfill layer space, to construct after cement mortar is solidified high-pressure rotary jet grouting pile, form water-stop curtain closely knit continuously, to block underground water, curtain water stop is effective, closely knit cement stabilization body can be formed continuously under reclamation area large porosity, dynamic water geological conditions, effectively block underground water.Speed of application is fast, and mechanical service efficiency is high, can be the construction period to create favorable conditions; Use common materials, the facility such as cement, sand, rotary jetting apparatus, easily carry out construction organization, can construct by rapid deployment; Construction cost is lower, effectively can save construction investment; The underground construction operations such as reclamation area are of great significance.
Below embodiment is to invention has been detailed description by reference to the accompanying drawings, and those skilled in the art can make many variations example to the present invention according to the above description.Thus, some details in embodiment should not form limitation of the invention, the present invention by the scope that defines using appended claims as protection scope of the present invention.
Claims (8)
1. a construction method for combined casting water-stop curtain, is characterized in that, comprising:
Constructing peripheral compaction grouting in edge along works area, forms the peripheral compaction grouting curtain closed and be located in the edge of described works area, and described peripheral compaction grouting curtain is deeply to backfill layer;
In described works area, enclose compaction grouting in construction, form the close grouting curtain of interior confined pressure closed, the close grouting curtain of described interior confined pressure deeply, to backfill layer, is provided with a headspace between described peripheral compaction grouting curtain and the close grouting curtain of described interior confined pressure; And
To construct in described headspace high-pressure rotary jet grouting pile, be engaged between adjacent two described high-pressure rotary jet grouting piles.
2. the construction method of combined casting water-stop curtain as claimed in claim 1, it is characterized in that, what peripheral compaction grouting curtain of constructing comprised peripheral compaction grouting curtain draws hole and compaction grouting, circulate carry out according to then construct next hole the mode of the position in a reserved hole of the position in a hole reserved behind construction hole in the hole of drawing of described peripheral compaction grouting curtain, form the hole at interval, compaction grouting in the hole at described interval, what return peripheral compaction grouting curtain of constructing in the position in Yu Liu hole again draws hole and compaction grouting, form the peripheral compaction grouting curtain closed.
3. the construction method of combined casting water-stop curtain as claimed in claim 1, it is characterized in that, what in construction, the close grouting curtain of confined pressure comprised the close grouting curtain of interior confined pressure draws hole and compaction grouting, circulate carry out according to then construct next hole the mode of the position in a reserved hole of the position in a hole reserved behind construction hole in the hole of drawing of the close grouting curtain of described interior confined pressure, form the hole at interval, compaction grouting in the hole at described interval, what return in the position construction in the reserved hole close grouting curtain of confined pressure again draws hole and compaction grouting, form the close grouting curtain of described interior confined pressure closed.
4. the construction method of combined casting water-stop curtain as claimed in claim 2 or claim 3, is characterized in that, after compaction grouting, expands and be engaged in described two adjacent holes.
5. the construction method of combined casting water-stop curtain as claimed in claim 1, is characterized in that,
What described high-pressure rotary jet grouting pile of constructing comprised rotary churning pile draws hole and high-pressure rotary-spray, circulate carry out according to then construct next hole the mode of the position in a reserved hole of the position in a hole reserved behind construction hole in the hole of drawing of described rotary churning pile, form the hole at interval, in the hole inner high voltage churning at described interval, what return the position construction rotary churning pile in reserved hole again draws hole and high-pressure rotary-spray, forms described high-pressure rotary jet grouting pile.
6. the construction method of combined casting water-stop curtain as claimed in claim 5, is characterized in that, high-pressure rotary jet grouting pile also comprises and recharging.
7. the construction method of combined casting water-stop curtain as claimed in claim 6, is characterized in that, adjacent two described high-pressure rotary jet grouting pile occlusions.
8. the construction method of combined casting water-stop curtain as claimed in claim 7, is characterized in that, be engaged between described peripheral compaction grouting curtain and described high-pressure rotary jet grouting pile, be engaged between described high-pressure rotary jet grouting pile and the close grouting curtain of described interior confined pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510475082.XA CN105064385A (en) | 2015-08-05 | 2015-08-05 | Construction method for composite grouting waterproof curtain |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510475082.XA CN105064385A (en) | 2015-08-05 | 2015-08-05 | Construction method for composite grouting waterproof curtain |
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| CN105064385A true CN105064385A (en) | 2015-11-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612119A (en) * | 2018-04-23 | 2018-10-02 | 中国水利水电第九工程局有限公司 | A kind of construction method of high-pressure rotary-spray seepage proof curtain |
| CN114439028A (en) * | 2021-12-27 | 2022-05-06 | 紫金矿业建设有限公司 | Water stop construction method suitable for collapsible soil |
-
2015
- 2015-08-05 CN CN201510475082.XA patent/CN105064385A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612119A (en) * | 2018-04-23 | 2018-10-02 | 中国水利水电第九工程局有限公司 | A kind of construction method of high-pressure rotary-spray seepage proof curtain |
| CN114439028A (en) * | 2021-12-27 | 2022-05-06 | 紫金矿业建设有限公司 | Water stop construction method suitable for collapsible soil |
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Application publication date: 20151118 |
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