CN102094658A - Method for directed induction fracturing grouting in shallow tunnel - Google Patents
Method for directed induction fracturing grouting in shallow tunnel Download PDFInfo
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Abstract
The invention discloses a method for directed induction fracturing grouting in a shallow tunnel, which belongs to the field of tunnel and underground engineering. The directed induction fracturing grouting is performed by the method, so that the grouting aim of economic, safe and effective water-blocked reinforcement is fulfilled. The method comprises the following steps of: drilling a first grouting hole at one end point (A) of a grouting profile line, drilling a first inducing hole and a second inducing hole respectively at positions which are 1.5d to 2d away from the two sides of the grouting hole, sealing, grouting to the grouting hole, and fracturing on the connecting lines of the grouting hole and the circle centers of the two inducing holes; and drilling a hole by the same method at the other end point (B) of the grouting profile line, and grouting so as to realize directed grouting. A third grouting hole is drilled at a position which is 4d to 5d away from the first grouting hole, and the process which is performed on the first grouting hole is repeated in the same way, so that the slurry of the inducing holes can be connected; the overall grouting profile line is accomplished according to the processes, so that the overall grouting curtain can be formed; and a fracturing direction in the fracturing grouting is started from a designed direction, so that the limited slurry can be injected into the position at which the slurry is most needed by only fracturing for one time.
Description
Technical field
The present invention relates to the fracture grouting construction technology in the ground underground construction, be applicable to the fracture grouting construction of in shallow tunnel, carrying out.
Background technology
Slip casting is meant that the means with force feed are injected into the slurries (being the liquefied mixture of host, solvent and Admixture) with certain gel time in loose soil layer or the water-bearing stratum crack; particle or filling formation fractures that slurries condense the fixed soil in back make the mechanical property of rock-soil layer be improved.It is usually used in water blockoff and reinforcing in hydraulic engineering, base pit engineering, tunnel and the underground construction.Grouting method commonly used can be divided into osmotic grouting, compaction grouting, filling and injecting slurry, fracture grouting by the grout distribution state, and for the rock-soil layer such as the weathered rock formation, crack of densification, its grouting mode commonly used is a fracture grouting.Fracture grouting is a kind ofly to ask the method for reinforcing with destruction, and it is a kind of grouting strengthening method that soil structures makes its curing then that destroys earlier.Under pressure, slurries overcome the initial stress and the tensile strength on stratum, the destruction that causes Rock-soil Mass Structure, and crack or hole that formation crude is had open, form new crack or hole, impel the property annotated of slurries and diffusion length to increase and reach the purpose of reinforcing.For fracture grouting at the weathering fissures rock-soil layer; randomness because of geostatic stress and crack; often make splitting direction in such rock-soil layer be difficult to splitting in the right direction according to actual needs; so the fracture grouting in such stratum the accident of slurry, spillage occurs running through regular meeting, so also be difficult to finish the task of water reinforcement.And on the engineering to this way to solve the problem for strengthening grouting pressure, making splitting of injected hole secondary or repeatedly splitting, form many slurry arteries and veins with this and come strengthening stratum and waterproof, seepage control, but this kind method has tangible blindness, and very elapsed time and slurries, uneconomical, and for city shallow embedding underground construction, if misoperation will make very big danger is arranged surface uplift.
Summary of the invention
Technical problem to be solved by this invention is can carry out accurate grouting by the range of grouting of designing requirement, minimizing blindness, a large amount of unnecessary slurries of saving.
The present invention solves the technical scheme of its technical problem:
A kind of shallow tunnel interior orientation is induced the fracture grouting method, and this induces the fracture grouting method may further comprise the steps:
Step 1, at the selected slip casting outline line of tunnel tunnel face, determine the slip casting hole count N=L/ (2a+d)+1 on the slip casting outline line, L is the length of slip casting outline line, d induces the diameter in hole for all injected holes and all, a be the injected hole center corresponding with it induce distance between the center, hole;
Step 4 induces hole and second to induce the hole to seal with first, injects the splitting of slurries to the first injected hole in first injected hole, and its splitting direction induces hole and second to induce on three the round heart lines in hole at first injected hole, first;
Step 5 is the center with another end points of slip casting outline line, bores second injected hole, and the diameter of second injected hole is d;
Step 6 on the extension line of the slip casting outline line on the second injected hole right side, is a place apart from the end points of slip casting outline line, and drill diameter is that the 4th of d induces the hole; On the slip casting outline line line in second injected hole left side, drill diameter is that the 3rd of d induces the hole;
Step 7 induces hole and the 4th to induce the hole to seal with the 3rd, injects the splitting of slurries to the second injected hole in second injected hole, and the splitting direction of its slurries induces hole and the 4th to induce on three the round heart lines in hole at second injected hole, the 3rd;
Step 8, the 3rd injected hole is bored at the 2a+d place, the center of circle of distance first injected hole on the slip casting outline line, and the diameter of the 3rd injected hole is d;
Step 9, on the slip casting outline line of the both sides of the 3rd injected hole, drill diameter is that the 5th of d induces hole and the 6th to induce the hole respectively apart from a place, the center of circle of the 3rd injected hole; The 5th induces the hole on the left side, and the 6th induces the hole on the right;
Step 10, induce hole and the 6th to induce the hole to seal with the 5th, in the 3rd injected hole, inject slurries to the three injected hole splittings, its splitting direction must induce hole and the 6th to induce on three the round heart lines in hole at the 3rd injected hole, the 5th, induce hole and the 5th to induce the hole to link to each other this moment second, and slurries are connected as a single entity;
Step 11, on the slip casting outline line, the 4th injected hole is bored at distance 2a+d place, the second injected hole center of circle, and the diameter of the 4th injected hole is d;
Step 12, on the slip casting outline line of the both sides of the 4th injected hole, drill diameter is that the 7th of d induces hole and the 8th to induce the hole respectively apart from a place, the center of circle of the 4th injected hole; The 7th induces the hole on the left side, and the 8th induces the hole on the right;
Step 13, induce hole and the 8th to induce the hole to seal with the 7th, in the 4th injected hole, inject slurries to the four injected hole splittings, the splitting direction of its slurries induces hole and the 8th to induce on three the round heart lines in hole at the 4th injected hole, the 7th, induce hole and the 8th to induce the hole to link to each other this moment the 3rd, and slurries are connected as a single entity;
Step 14, repeating step eight are finished the N injected hole on the grouting outline line to end and are induced the hole to step 13, seal, and slip casting, slurries are connected as a single entity, and form grouting curtain.
The invention has the beneficial effects as follows: the inventive method can make the cracking direction of fracture grouting along the design direction directional induction, make slurries along the assigned direction splitting, only need cracking once limited slurries can be injected the position that needs most, saved material, saved the slip casting time, improved accuracy, strengthened its controllability, strengthened the effect that grouting for water blocking is reinforced, so can effectively reduce the cost of whole engineering.The danger of having avoided surface uplift to cause.
Description of drawings
Fig. 1 shallow tunnel interior orientation is induced the boring schematic diagram of fracture grouting method.
The specific embodiment
Embodiment one
A kind of shallow tunnel interior orientation is induced the fracture grouting method, and this induces the fracture grouting method may further comprise the steps:
Step 1, at the selected slip casting outline line AB of tunnel tunnel face, determine the slip casting hole count N=L/ (2a+d)+1 on the slip casting outline line AB, L is the length of slip casting outline line AB, d induces the diameter in hole for all injected holes and all, a be the injected hole center corresponding with it induce distance between the center, hole;
Step 4 induces hole 1-1 and second to induce hole 1-2 to seal with first, injects 1 splitting of slurries 5 to first injected holes in first injected hole 1, and its splitting direction induces hole 1-1 and second to induce on three round heart lines of hole 1-2 at first injected hole 1, first;
Step 5 is the center with another terminal B of slip casting outline line, and the diameter that bores second injected hole, 2, the second injected holes 2 is d;
Step 6 on the extension line of the slip casting outline line AB on second injected hole, 2 right sides, is a place apart from the terminal B of slip casting outline line, and drill diameter is that the 4th of d induces hole 2-2; On the slip casting outline line AB in second injected hole, 2 left sides line, drill diameter is that the 3rd of d induces hole 2-1;
Step 7, induce hole 2-1 and the 4th to induce hole 2-2 to seal with the 3rd, inject 2 splittings of slurries 5 to second injected holes in second injected hole 2, the splitting direction of its slurries induces hole 2-1 and the 4th to induce on three round heart lines of hole 2-2 at second injected hole the 2, the 3rd;
Step 8, the 2a+d place, the center of circle of distance first injected hole 1 on slip casting outline line AB, the diameter that bores the 3rd injected hole 3, the three injected holes 3 is d;
Step 9, on the slip casting outline line AB of the both sides of the 3rd injected hole 3, drill diameter is that the 5th of d induces hole 3-1 and the 6th to induce hole 3-2 respectively apart from a place, the center of circle of the 3rd injected hole 3; The 5th induces hole 3-1 on the left side, and the 6th induces hole 3-2 on the right;
Step 10, induce hole 3-1 and the 6th to induce hole 3-2 to seal with the 5th, in the 3rd injected hole 3, inject 3 splittings of slurries 5 to the 3rd injected holes, its splitting direction must induce hole 3-1 and the 6th to induce on three round heart lines of hole 3-2 at the 3rd injected hole the 3, the 5th, induce hole 1-2 and the 5th to induce hole 3-1 to link to each other this moment second, and slurries are connected as a single entity;
Step 11, on slip casting outline line AB, distance 2a+d place, second injected hole, 2 center of circle, the diameter that bores the 4th injected hole 4, the four injected holes 4 is d;
Step 12, on the slip casting outline line AB of the both sides of the 4th injected hole 4, drill diameter is that the 7th of d induces hole 4-1 and the 8th to induce hole 4-2 respectively apart from a place, the center of circle of the 4th injected hole 4; The 7th induces hole 4-1 on the left side, and the 8th induces hole 4-2 on the right;
Step 13, induce hole 4-1 and the 8th to induce hole 4-2 to seal with the 7th, in the 4th injected hole 4, inject 4 splittings of slurries 5 to the 4th injected holes, the splitting direction of its slurries induces hole 4-1 and the 8th to induce on three round heart lines of hole 4-2 at the 4th injected hole the 4, the 7th, induce hole 2-1 and the 8th to induce hole 4-2 to link to each other this moment the 3rd, and slurries are connected as a single entity;
Step 14, repeating step eight are finished the N injected hole on grouting outline line AB to end and are induced the hole to step 13, seal, and slip casting, slurries are connected as a single entity, and form grouting curtain.
Embodiment two
Slip casting in 88.6 ° of scopes of tunnel upper, the slip casting outline line is a circular arc, radius is 2.5m, injected hole and to induce the diameter d in hole be 42mm, the degree of depth in hole is 10m, and the injected hole center is corresponding with it induces between the center, hole is 1.5d=63mm apart from a.
A kind of shallow tunnel interior orientation is induced the fracture grouting method, and this induces the fracture grouting method may further comprise the steps:
Step 1, at the selected slip casting outline line AB of tunnel tunnel face, length L=2.5m * 88.6 * π/180=3864mm of slip casting outline line AB determines slip casting hole count N=L/ (2a+d)+1=3864mm/ (2 * the 63mm+42mm)+1=24 on the slip casting outline line AB;
Step 4 induces hole 1-1 and second to induce hole 1-2 to seal with first, injects 1 splitting of slurries 5 to first injected holes in first injected hole 1, and its splitting direction induces hole 1-1 and second to induce on three round heart lines of hole 1-2 at first injected hole 1, first;
Step 5 is the center with another terminal B of slip casting outline line, and the diameter that bores second injected hole, 2, the second injected holes 2 is 42mm;
Step 6 on the extension line of the slip casting outline line AB on second injected hole, 2 right sides, is the 63mm place apart from the terminal B of slip casting outline line, and drill diameter is that the 4th of 42mm induces hole 2-2; On the slip casting outline line AB in second injected hole, 2 left sides line, drill diameter is that the 3rd of 42mm induces hole 2-1;
Step 7, induce hole 2-1 and the 4th to induce hole 2-2 to seal with the 3rd, inject 2 splittings of slurries 5 to second injected holes in second injected hole 2, the splitting direction of its slurries induces hole 2-1 and the 4th to induce on three round heart lines of hole 2-2 at second injected hole the 2, the 3rd;
Step 8, the 168mm place, the center of circle of distance first injected hole 1 on slip casting outline line AB, the diameter that bores the 3rd injected hole 3, the three injected holes 3 is 42mm;
Step 9, on the slip casting outline line AB of the both sides of the 3rd injected hole 3, drill diameter is that the 5th of 42mm induces hole 3-1 and the 6th to induce hole 3-2 respectively apart from the 63mm place, the center of circle of the 3rd injected hole 3; The 5th induces hole 3-1 on the left side, and the 6th induces hole 3-2 on the right;
Step 10, induce hole 3-1 and the 6th to induce hole 3-2 to seal with the 5th, in the 3rd injected hole 3, inject 3 splittings of slurries 5 to the 3rd injected holes, its splitting direction must induce hole 3-1 and the 6th to induce on three round heart lines of hole 3-2 at the 3rd injected hole the 3, the 5th, induce hole 1-2 and the 5th to induce hole 3-1 to link to each other this moment second, and slurries are connected as a single entity;
Step 11, on slip casting outline line AB, distance 168mm place, second injected hole, 2 center of circle, the diameter that bores the 4th injected hole 4, the four injected holes 4 is 42mm;
Step 12, on the slip casting outline line AB of the both sides of the 4th injected hole 4, drill diameter is that the 7th of 42mm induces hole 4-1 and the 8th to induce hole 4-2 respectively apart from the 63mm place, the center of circle of the 4th injected hole 4; The 7th induces hole 4-1 on the left side, and the 8th induces hole 4-2 on the right;
Step 13, induce hole 4-1 and the 8th to induce hole 4-2 to seal with the 7th, in the 4th injected hole 4, inject 4 splittings of slurries 5 to the 4th injected holes, the splitting direction of its slurries induces hole 4-1 and the 8th to induce on three round heart lines of hole 4-2 at the 4th injected hole the 4, the 7th, induce hole 2-1 and the 8th to induce hole 4-2 to link to each other this moment the 3rd, and slurries are connected as a single entity;
Step 14, repeating step eight are finished the 24th injected hole on grouting outline line AB to end and are induced the hole to step 13, seal, and slip casting, slurries are connected as a single entity, and form grouting curtain.
Embodiment three
Slip casting in 120 ° of scopes of tunnel upper, the slip casting outline line is a circular arc, radius is 4.76m, injected hole and induce the diameter d in hole to be 80mm, the degree of depth in hole is 12m, and the injected hole center is corresponding with it induces between the center, hole is 2d=160mm apart from a.
A kind of shallow tunnel interior orientation is induced the fracture grouting method, and this induces the fracture grouting method may further comprise the steps:
Step 1, at the selected slip casting outline line AB of tunnel tunnel face, length L=2.5m * 120 * π/180=10000mm of slip casting outline line AB determines slip casting hole count N=L/ (2a+d)+1=10000mm/ (2 * the 160mm+80mm)+1=26 on the slip casting outline line AB;
Step 4 induces hole 1-1 and second to induce hole 1-2 to seal with first, injects 1 splitting of slurries 5 to first injected holes in first injected hole 1, and its splitting direction induces hole 1-1 and second to induce on three round heart lines of hole 1-2 at first injected hole 1, first;
Step 5 is the center with another terminal B of slip casting outline line, and the diameter that bores second injected hole, 2, the second injected holes 2 is 80mm;
Step 6 on the extension line of the slip casting outline line AB on second injected hole, 2 right sides, is the 160mm place apart from the terminal B of slip casting outline line, and drill diameter is that the 4th of 80mm induces hole 2-2; On the slip casting outline line AB in second injected hole, 2 left sides line, drill diameter is that the 3rd of 80mm induces hole 2-1;
Step 7, induce hole 2-1 and the 4th to induce hole 2-2 to seal with the 3rd, inject 2 splittings of slurries 5 to second injected holes in second injected hole 2, the splitting direction of its slurries induces hole 2-1 and the 4th to induce on three round heart lines of hole 2-2 at second injected hole the 2, the 3rd;
Step 8, the 168mm place, the center of circle of distance first injected hole 1 on slip casting outline line AB, the diameter that bores the 3rd injected hole 3, the three injected holes 3 is 80mm;
Step 9, on the slip casting outline line AB of the both sides of the 3rd injected hole 3, drill diameter is that the 5th of 80mm induces hole 3-1 and the 6th to induce hole 3-2 respectively apart from the 160mm place, the center of circle of the 3rd injected hole 3; The 5th induces hole 3-1 on the left side, and the 6th induces hole 3-2 on the right;
Step 10, induce hole 3-1 and the 6th to induce hole 3-2 to seal with the 5th, in the 3rd injected hole 3, inject 3 splittings of slurries 5 to the 3rd injected holes, its splitting direction must induce hole 3-1 and the 6th to induce on three round heart lines of hole 3-2 at the 3rd injected hole the 3, the 5th, induce hole 1-2 and the 5th to induce hole 3-1 to link to each other this moment second, and slurries are connected as a single entity;
Step 11, on slip casting outline line AB, distance 168mm place, second injected hole, 2 center of circle, the diameter that bores the 4th injected hole 4, the four injected holes 4 is 80mm;
Step 12, on the slip casting outline line AB of the both sides of the 4th injected hole 4, drill diameter is that the 7th of 80mm induces hole 4-1 and the 8th to induce hole 4-2 respectively apart from the 160mm place, the center of circle of the 4th injected hole 4; The 7th induces hole 4-1 on the left side, and the 8th induces hole 4-2 on the right;
Step 13, induce hole 4-1 and the 8th to induce hole 4-2 to seal with the 7th, in the 4th injected hole 4, inject 4 splittings of slurries 5 to the 4th injected holes, the splitting direction of its slurries induces hole 4-1 and the 8th to induce on three round heart lines of hole 4-2 at the 4th injected hole the 4, the 7th, induce hole 2-1 and the 8th to induce hole 4-2 to link to each other this moment the 3rd, and slurries are connected as a single entity;
Step 14, repeating step eight are finished the 26th injected hole on grouting outline line AB to end and are induced the hole to step 13, seal, and slip casting, slurries are connected as a single entity, and form grouting curtain.
Embodiment four
Slip casting in 120 ° of scopes of tunnel upper, the slip casting outline line is a circular arc, radius is 4m, injected hole and induce the diameter d in hole to be 110mm, the degree of depth in hole is 14m, and the injected hole center is corresponding with it induces between the center, hole is 1.5d=165mm apart from a.
A kind of shallow tunnel interior orientation is induced the fracture grouting method, and this induces the fracture grouting method may further comprise the steps:
Step 1, at the selected slip casting outline line AB of tunnel tunnel face, length L=4m * 120 * π/180=8400mm of slip casting outline line AB determines slip casting hole count N=L/ (2a+d)+1=8400mm/ (2 * the 165mm+110mm)+1=20 on the slip casting outline line AB;
Step 4 induces hole 1-1 and second to induce hole 1-2 to seal with first, injects 1 splitting of slurries 5 to first injected holes in first injected hole 1, and its splitting direction induces hole 1-1 and second to induce on three round heart lines of hole 1-2 at first injected hole 1, first;
Step 5 is the center with another terminal B of slip casting outline line, and the diameter that bores second injected hole, 2, the second injected holes 2 is 110mm;
Step 6 on the extension line of the slip casting outline line AB on second injected hole, 2 right sides, is the 165mm place apart from the terminal B of slip casting outline line, and drill diameter is that the 4th of 110mm induces hole 2-2; On the slip casting outline line AB in second injected hole, 2 left sides line, drill diameter is that the 3rd of 110mm induces hole 2-1;
Step 7, induce hole 2-1 and the 4th to induce hole 2-2 to seal with the 3rd, inject 2 splittings of slurries 5 to second injected holes in second injected hole 2, the splitting direction of its slurries induces hole 2-1 and the 4th to induce on three round heart lines of hole 2-2 at second injected hole the 2, the 3rd;
Step 8, the 168mm place, the center of circle of distance first injected hole 1 on slip casting outline line AB, the diameter that bores the 3rd injected hole 3, the three injected holes 3 is 110mm;
Step 9, on the slip casting outline line AB of the both sides of the 3rd injected hole 3, drill diameter is that the 5th of 110mm induces hole 3-1 and the 6th to induce hole 3-2 respectively apart from the 165mm place, the center of circle of the 3rd injected hole 3; The 5th induces hole 3-1 on the left side, and the 6th induces hole 3-2 on the right;
Step 10, induce hole 3-1 and the 6th to induce hole 3-2 to seal with the 5th, in the 3rd injected hole 3, inject 3 splittings of slurries 5 to the 3rd injected holes, its splitting direction must induce hole 3-1 and the 6th to induce on three round heart lines of hole 3-2 at the 3rd injected hole the 3, the 5th, induce hole 1-2 and the 5th to induce hole 3-1 to link to each other this moment second, and slurries are connected as a single entity;
Step 11, on slip casting outline line AB, distance 168mm place, second injected hole, 2 center of circle, the diameter that bores the 4th injected hole 4, the four injected holes 4 is 110mm;
Step 12, on the slip casting outline line AB of the both sides of the 4th injected hole 4, drill diameter is that the 7th of 110mm induces hole 4-1 and the 8th to induce hole 4-2 respectively apart from the 165mm place, the center of circle of the 4th injected hole 4; The 7th induces hole 4-1 on the left side, and the 8th induces hole 4-2 on the right;
Step 13, induce hole 4-1 and the 8th to induce hole 4-2 to seal with the 7th, in the 4th injected hole 4, inject 4 splittings of slurries 5 to the 4th injected holes, the splitting direction of its slurries induces hole 4-1 and the 8th to induce on three round heart lines of hole 4-2 at the 4th injected hole the 4, the 7th, induce hole 2-1 and the 8th to induce hole 4-2 to link to each other this moment the 3rd, and slurries are connected as a single entity;
Step 14, repeating step eight are finished the 20th injected hole on grouting outline line AB to end and are induced the hole to step 13, seal, and slip casting, slurries are connected as a single entity, and form grouting curtain.
Claims (4)
1. a shallow tunnel interior orientation is induced the fracture grouting method, it is characterized in that, this induces the fracture grouting method may further comprise the steps:
Step 1, at the selected slip casting outline line (AB) of tunnel tunnel face, determine the slip casting hole count N=L/ (2a+d)+1 on the slip casting outline line (AB), L is the length of slip casting outline line (AB), d induces the diameter in hole for all injected holes and all, a be the injected hole center corresponding with it induce distance between the center, hole;
Step 2 is the center with the end points (A) of slip casting outline line, bores first injected hole (1), and the diameter of first injected hole (1) is d;
Step 3 on the extension line of the slip casting outline line (AB) in first injected hole (1) left side, is a place apart from the end points (A) of slip casting outline line, and drill diameter is that first of d induces hole (1-1); On slip casting outline line (AB) line on first injected hole (1) right side, drill diameter is that second of d induces hole (1-2);
Step 4, induce hole (1-1) and second to induce hole (1-2) to seal with first, inject slurries (5) to first injected hole (1) splitting in first injected hole (1), its splitting direction induces hole (1-1) and second to induce on three the round heart lines in hole (1-2) at first injected hole (1), first;
Step 5 is the center with another end points (B) of slip casting outline line, bores second injected hole (2), and the diameter of second injected hole (2) is d;
Step 6 on the extension line of the slip casting outline line (AB) on second injected hole (2) right side, is a place apart from the end points (B) of slip casting outline line, and drill diameter is that the 4th of d induces hole (2-2); On slip casting outline line (AB) line in second injected hole (2) left side, drill diameter is that the 3rd of d induces hole (2-1);
Step 7, induce hole (2-1) and the 4th to induce hole (2-2) to seal with the 3rd, inject slurries (5) to second injected hole (2) splitting in second injected hole (2), the splitting direction of its slurries induces hole (2-1) and the 4th to induce on three the round heart lines in hole (2-2) at second injected hole (2), the 3rd;
Step 8 at the 2a+d place, the center of circle that slip casting outline line (AB) is gone up distance first injected hole (1), is bored the 3rd injected hole (3), and the diameter of the 3rd injected hole (3) is d;
Step 9, on the slip casting outline line (AB) of the both sides of the 3rd injected hole (3), drill diameter is that the 5th of d induces hole (3-1) and the 6th to induce hole (3-2) respectively apart from a place, the center of circle of the 3rd injected hole (3); The 5th induces hole (3-1) on the left side, and the 6th induces hole (3-2) on the right;
Step 10, induce hole (3-1) and the 6th to induce hole (3-2) to seal with the 5th, in the 3rd injected hole (3), inject slurries (5) to the 3rd injected hole (3) splitting, its splitting direction must induce hole (3-1) and the 6th to induce on three the round heart lines in hole (3-2) at the 3rd injected hole (3), the 5th, induce hole (1-2) and the 5th to induce hole (3-1) to link to each other this moment second, and slurries are connected as a single entity;
Step 11, on slip casting outline line (AB), the 4th injected hole (4) is bored at distance 2a+d place, second injected hole (2) center of circle, and the diameter of the 4th injected hole (4) is d;
Step 12, on the slip casting outline line (AB) of the both sides of the 4th injected hole (4), drill diameter is that the 7th of d induces hole (4-1) and the 8th to induce hole (4-2) respectively apart from a place, the center of circle of the 4th injected hole (4); The 7th induces hole (4-1) on the left side, and the 8th induces hole (4-2) on the right;
Step 13, induce hole (4-1) and the 8th to induce hole (4-2) to seal with the 7th, in the 4th injected hole (4), inject slurries (5) to the 4th injected hole (4) splitting, the splitting direction of its slurries induces hole (4-1) and the 8th to induce on three the round heart lines in hole (4-2) at the 4th injected hole (4), the 7th, induce hole (2-1) and the 8th to induce hole (4-2) to link to each other this moment the 3rd, and slurries are connected as a single entity;
Step 14, repeating step eight are finished the N injected hole on grouting outline line (AB) to end and are induced the hole to step 13, seal, and slip casting, slurries are connected as a single entity, and form grouting curtain.
2. a kind of shallow tunnel interior orientation according to claim 1 is induced the fracture grouting method, it is characterized in that described first to N injected hole (1,2 ... N) the degree of depth is 10m～14m; All injected holes and induce the diameter d in hole to be 42mm～110mm.
3. a kind of shallow tunnel interior orientation according to claim 1 is induced the fracture grouting method, it is characterized in that, described injected hole center is corresponding with it induces between the center, hole is 1.5d～2d apart from a.
4. a kind of shallow tunnel interior orientation according to claim 1 is induced the fracture grouting method, it is characterized in that, described slurries (5) are the cement based slurries.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696416A (en) * | 2014-01-17 | 2014-04-02 | 黄滨 | Novel foundation treatment method |
| CN107366542A (en) * | 2016-05-13 | 2017-11-21 | 朱世阳 | A kind of grouting method for having been equipped with pit shaft |
| CN108952758A (en) * | 2018-06-26 | 2018-12-07 | 山东科技大学 | A kind of layer of sand slip casting earth's surface lifting control method based on borehole collapse and induction splitting |
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| CN101749031A (en) * | 2009-12-24 | 2010-06-23 | 北京交通大学 | Compound grouting reinforcement method for subsea tunnel going through water-rich sand stratum |
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| US3946567A (en) * | 1973-02-19 | 1976-03-30 | Pont-A-Mousson S.A. | Voussoir for a lining, and method for constructing the lining |
| CN101749031A (en) * | 2009-12-24 | 2010-06-23 | 北京交通大学 | Compound grouting reinforcement method for subsea tunnel going through water-rich sand stratum |
| CN101781889A (en) * | 2010-01-29 | 2010-07-21 | 中铁四局集团第五工程有限公司 | H-shaped waterproof curtain construction process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696416A (en) * | 2014-01-17 | 2014-04-02 | 黄滨 | Novel foundation treatment method |
| CN107366542A (en) * | 2016-05-13 | 2017-11-21 | 朱世阳 | A kind of grouting method for having been equipped with pit shaft |
| CN108952758A (en) * | 2018-06-26 | 2018-12-07 | 山东科技大学 | A kind of layer of sand slip casting earth's surface lifting control method based on borehole collapse and induction splitting |
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| CN102094658B (en) | 2012-08-08 |
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