CN111980717B - Method for processing shield shell grouting wrappage of shield tunneling machine - Google Patents
Method for processing shield shell grouting wrappage of shield tunneling machine Download PDFInfo
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- CN111980717B CN111980717B CN202010892275.6A CN202010892275A CN111980717B CN 111980717 B CN111980717 B CN 111980717B CN 202010892275 A CN202010892275 A CN 202010892275A CN 111980717 B CN111980717 B CN 111980717B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
Abstract
The invention discloses a method for processing a shield shell grouting wrap of a shield tunneling machine, which comprises the following steps: firstly, stopping the shield tunneling machine; secondly, coring a geological drill hole to determine the range of the grouting wrappage; thirdly, backfilling the geological drilling hole; fourthly, marking a down-the-hole drilling position; fifthly, breaking the grouting wrapping; sixthly, backfilling the down-the-hole drill hole; seventhly, judging whether the grouting wrap is broken; eighthly, locally encrypting and arranging holes; ninthly, repeating the fifth step to the seventh step; and tentatively, the shield tunneling machine recovers tunneling. According to the invention, the range of the grouting package on the upper part of the shield shell of the shield machine is confirmed by drilling and coring on the ground through the geological drill, so that the damage to the shield shell of the shield machine can be effectively reduced, the risk of water burst and sand gushing is avoided, the grouting package is broken through the down-the-hole drill, the construction period can be effectively saved, the construction cost is saved, whether the grouting package on the upper part of the shield shell is broken or not is judged through the ball valve, the breaking quality of the grouting package on the shield shell of the shield machine can be effectively ensured, and the tunneling posture of the shield machine can be controlled.
Description
Technical Field
The invention belongs to the technical field of shield tunneling construction, and particularly relates to a method for processing a shield shell grouting wrap of a shield tunneling machine.
Background
The shield tunneling synchronous grouting is an essential link in the shield construction process, and in the shield construction process, due to the fact that synchronous grouting pressure is too large, grouting quantity is too large, and factors such as long-time halt are overlapped, the synchronous grouting mortar is solidified on the surface of the upper portion of a shield body, the upper portion surface of a shield machine is wrapped by the mortar, so that the shield machine tunneling posture is uncontrollable, the shield machine tunneling thrust is large, ground settlement is uncontrollable, and the problem that segments are damaged is solved.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for processing shield shell grouting wrappage of a shield machine, which confirms the range of the upper grouting wrappage of the shield shell of the shield machine by drilling and coring on the ground through a geological drill, can effectively reduce the damage to the shield shell of the shield machine, and can also effectively avoid the risk of water gushing and sand gushing; the method for breaking grouting packages through down-the-hole drill drilling can avoid the influence of shaft excavation on the surrounding environment and shaft excavation risks, effectively save the construction period and simultaneously effectively save the construction cost; whether the grouting wrappage on the upper part of the shield shell is broken or not is judged through the ball valve arranged in the shield shell, so that the breaking quality of the grouting wrappage on the shield shell of the shield machine can be effectively ensured, and the controllable tunneling posture of the shield machine is ensured.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for processing a shield shell grouting wrap of a shield tunneling machine is characterized by comprising the following steps:
firstly, stopping a shield tunneling machine;
step two, coring the drill hole of the geological drill to determine the range of the grouting wrappage: positioning the position of the shield machine on the ground above the shield machine by adopting a total station instrument, marking a plurality of circles of geological drilling positions at the position of the shield machine positioned on the ground, drilling and coring on the marked geological drilling positions by adopting a geological drill, determining the range of a grouting inclusion on the upper part of the shield shell, marking the boundary of the determined range of the grouting inclusion, and forming geological drilling after the geological drill drills and cores on the marked geological drilling positions;
backfilling the geological drilling hole;
step four, marking the position of the down-the-hole drill hole: marking a plurality of down-the-hole drill hole positions in the range according to the range of the grouting wrappage marked in the step two;
fifthly, breaking grouting packages: adopting a down-the-hole drill to carry out drilling construction at a plurality of down-the-hole drill hole positions in sequence, forming down-the-hole drill holes after the down-the-hole drill holes are drilled at the down-the-hole drill hole positions, and vibrating and loosening the grouting wrapping object around the shield shell at the bottom of the down-the-hole drill holes through a drill bit of the down-the-hole drill;
step six, backfilling the down-the-hole drill hole;
step seven, judging whether the grouting wrap is broken: opening a plurality of ball valves arranged in a shield shell of the shield tunneling machine, observing the water seepage or mud seepage situations of the ball valves, indicating that the grouting wrappage is not completely broken when the ball valves do not have the water seepage or mud seepage phenomena, closing the ball valves, marking the positions of the ball valves which do not have the water seepage or mud seepage phenomena on the ground, and executing the step eight; when water seepage or mud seepage occurs in each ball valve, indicating that the grouting wrap is broken, closing the ball valve and executing the step ten;
step eight, local encryption hole distribution: marking a plurality of down-the-hole drilling encrypted hole positions in the ground local area range corresponding to the position of the ball valve marked in the step seven;
step nine, regarding the down-the-hole drilling encrypted hole site as a down-the-hole drilling hole site, and repeating the step five to the step seven;
and step ten, the shield tunneling machine recovers tunneling.
The processing method of the shield shell grouting wrap of the shield tunneling machine is characterized by comprising the following steps of: in the second step, when carrying out geology and boring the drilling and coring, the shield machine's of subaerial location position department from interior to exterior marks many circles in proper order geology drilling position adopts geology to bore from interior to exterior in proper order many circles simultaneously geology drilling position is drilled and is cored, and concrete process is as follows:
step 201, firstly, drilling and coring are carried out at the center of the position of the shield machine positioned on the ground by adopting a geological drill, a central geological drill hole with a grouting wrap at the upper part of a shield shell is determined, and a hole position corresponding to the central geological drill hole is used as a first circle of geological drill hole position;
202, arranging an i +1 th circle of geological drilling position on the ground outside the i +1 th circle of geological drilling position, drilling and coring the i +1 th circle of geological drilling position, judging whether a core sample corresponding to the i +1 th circle of geological drilling position has a grouting wrap, and executing a step 203 when the core sample corresponding to the i +1 th circle of geological drilling position has the grouting wrap; when the core sample corresponding to the i +1 th geological drilling position has no grouting wrap, executing step 204;
when i is equal to 1, the first circle of geological drilling positions are hole positions corresponding to the central geological drilling holes, and only one hole position corresponding to the central geological drilling hole is arranged; when i is greater than 1, each circle of geological drilling sites comprises a plurality of geological drilling sites;
step 203, regarding the (i + 1) th geological drilling position as the (i) th geological drilling position, and executing step 202;
204, arranging a stop ring geological drilling position between the ith ring of geological drilling position and the (i + 1) th ring of geological drilling position, wherein the stop ring geological drilling position comprises a plurality of geological drilling positions, and when a core sample corresponding to the stop ring geological drilling position is provided with a grouting wrap, connecting lines of the plurality of geological drilling positions in the (i + 1) th ring of geological drilling positions are used as the boundary of the range of the grouting wrap on the upper part of the shield shell; and when the core sample corresponding to the geological drilling position of the termination circle has no grouting wrap, using a connecting line of a plurality of geological drilling positions in the geological drilling position of the termination circle as the boundary of the range of the grouting wrap on the upper part of the shield shell.
The processing method of the shield shell grouting wrap of the shield tunneling machine is characterized by comprising the following steps of: when backfilling of geological drilling holes is carried out in the third step, when drilling coring of the next geological drilling hole is carried out after drilling coring of each geological drilling hole is finished in the second step, backfilling is carried out on the former geological drilling hole synchronously; and backfilling the last geological drilling hole after the drilling hole coring of the last geological drilling hole position is finished.
The processing method of the shield shell grouting wrap of the shield tunneling machine is characterized by comprising the following steps of: and the boundary of the range of the grouting wrap marked in the second step is a rectangular boundary.
The processing method of the shield shell grouting wrap of the shield tunneling machine is characterized by comprising the following steps of: step five, when the down-the-hole drill is used for breaking the grouting wrap, the pressure regulating tissue is pushed to continuously push a drilling tool of the down-the-hole drill, and a drill bit of the down-the-hole drill is always in touch with the grouting wrap until the grouting wrap around a shield shell at the bottom of the down-the-hole drill is vibrated to be loosened, so that the grouting wrap is broken; and when the drill bit of the down-the-hole drill touches the grouting wrapping object, the drilling tool of the down-the-hole drill circularly rotates forwards and backwards.
The processing method of the shield shell grouting wrap of the shield tunneling machine is characterized by comprising the following steps of: when backfilling of the down-the-hole drill hole is carried out in the sixth step, when drilling construction of the next down-the-hole drill hole is carried out after drilling construction of each down-the-hole drill hole position in the fifth step is finished, backfilling is carried out on the previous down-the-hole drill hole synchronously; and after the drilling construction of the last down-the-hole drill hole position is finished, backfilling the last down-the-hole drill hole.
The processing method of the shield shell grouting wrap of the shield tunneling machine is characterized by comprising the following steps of: and (4) vertically distributing the geological drilling holes in the step two and the down-the-hole drilling holes in the step five.
Compared with the prior art, the invention has the following advantages:
1. compared with the traditional method for determining the grouting wrapping object by drilling the hole in the shield shell in the hole, the method for determining the grouting wrapping object at the upper part of the shield shell by coring the hole in the ground through the geological drill can effectively reduce the damage to the shield shell of the shield machine and simultaneously can effectively avoid the risk of water gushing and sand gushing.
2. The method for breaking grouting packages by drilling coring and down-the-hole drilling can avoid the influence of shaft excavation on the surrounding environment and shaft excavation risks, effectively save the construction period and effectively save the construction cost.
3. According to the invention, whether the grouting wrap on the upper part of the shield shell is broken or not is judged through the ball valve arranged in the shield shell, so that a constructor can quickly judge the treatment effect of the grouting wrap on the shield shell, the construction efficiency can be effectively improved, the breaking quality of the grouting wrap on the shield shell of the shield machine can be effectively ensured, and the tunneling attitude of the shield machine can be controlled.
In conclusion, the invention confirms the range of the grouting wrappage on the upper part of the shield shell of the shield machine by drilling and coring on the ground through the geological drill, can effectively reduce the damage to the shield shell of the shield machine, and can also effectively avoid the risk of water gushing and sand gushing; the method for breaking grouting packages through down-the-hole drill drilling can avoid the influence of shaft excavation on the surrounding environment and shaft excavation risks, effectively save the construction period and simultaneously effectively save the construction cost; whether the grouting wrappage on the upper part of the shield shell is broken or not is judged through the ball valve arranged in the shield shell, so that the breaking quality of the grouting wrappage on the shield shell of the shield machine can be effectively ensured, and the controllable tunneling posture of the shield machine is ensured.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a block flow diagram of the present invention.
FIG. 2 is a schematic diagram of the placement of geological borehole sites according to the present invention.
FIG. 3 is a schematic diagram of the layout of down-the-hole drilling sites of the present invention.
Fig. 4 is a schematic diagram of the local encryption hole distribution of the present invention.
FIG. 5 is a state diagram of the use of the geological drill of the present invention.
FIG. 6 is a view showing the state of use of the down-the-hole drill of the present invention.
Description of reference numerals:
1-shield shell; 2, geological drilling; 3-down-the-hole drilling position;
4-ball valve; 5, drilling a central geological hole; 6, drilling a down-the-hole;
7-geological drilling position; 8 — a first boundary; 9 — a second boundary;
10-grouting a wrap; and 11, drilling down-the-hole holes to encrypt hole positions.
Detailed Description
The method for treating the shield shell grouting wrapping of the shield tunneling machine shown in fig. 1 to 6 comprises the following steps:
firstly, stopping a shield tunneling machine;
during practical use, after the upper surface of the shield machine is wrapped by mortar generated by synchronous grouting, the tunneling attitude of the shield machine is uncontrollable, the thrust of the shield machine is large, and the shield machine is stopped because the thrust is too large and the design thrust of the shield machine cannot meet the requirement of the forward thrust of the shield machine.
Step two, coring the drill hole of the geological drill to determine the range of the grouting wrappage: the method comprises the steps that a total station is adopted to position the position of the shield machine on the ground above the shield machine, a plurality of circles of geological drilling positions are marked at the position of the shield machine positioned on the ground, a geological drill 2 is adopted to drill and core at the marked geological drilling positions, the range of a grouting wrap 10 at the upper part of a shield shell 1 is determined, the boundary of the determined range of the grouting wrap 10 is marked, and geological drill 2 forms geological drilling holes after drilling and coring are carried out at the marked geological drilling positions;
during the in-service use, before adopting geological drill 2 to drill and get the core, first-selected needs are according to the design drawing, confirm every geological drilling position 7 department, the perpendicular distance between ground and the shield shell 1 of shield structure machine, and then help controlling the drilling depth of geological drill 2 according to the concrete position of every geological drilling position 7, avoid geological drill 2 to bore and establish the degree of depth too big, lead to geological drill 2 to produce the harm of certain degree to the shield shell 1 of shield structure machine.
It should be noted that, by marking the boundary of the range of the upper portion of the shield shell 1 wrapped by the mortar (i.e. the range of the grouting wrapping 10), the constructor can visually see the range of the grouting wrapping 10, so that the constructor can conveniently process the grouting wrapping 10 on the upper portion of the shield shell 1 through down-the-hole drilling in the later stage.
As shown in fig. 5, in specific implementation, when the geological drill 2 is used for drilling and coring, a drilling tool of the geological drill 2 vertically drills into the ground from top to bottom for coring.
Backfilling the geological drilling hole;
during actual use, before arrangement of the down-the-hole drill hole positions, geological drill holes need to be backfilled, so that the down-the-hole drill hole positions can be conveniently marked, and meanwhile, the stability of the upper stratum of the shield tunneling machine is guaranteed.
When the geological drilling is backfilled, the geological drilling is backfilled by using medium sand within a depth range within 1m from the position of the shield shell of the shield machine within the geological drilling, and cement mortar is backfilled to the ground position within a depth range within more than 1m from the position of the shield shell 1 within the geological drilling.
Step four, marking the position of the down-the-hole drill hole: as shown in fig. 3, according to the range of the grouting package 10 marked in the step two, marking a plurality of down-the-hole drill holes 3 at equal intervals in the range;
in actual use, the distances between the plurality of down-the-hole drill hole sites 3 distributed around each down-the-hole drill hole site 3 are equal, and L is1Preferably 0.45 m.
It should be noted that the down-the-hole drill hole sites 3 may be arranged in multiple rows, and the multiple rows of the down-the-hole drill hole sites 3 are arranged in a staggered manner; the down-the-hole drill hole sites 3 can be arranged in a plurality of rows or a plurality of rows, and the down-the-hole drill hole sites 3 are arranged in a staggered manner.
Fifthly, breaking grouting packages: adopting a down-the-hole drill 6 to carry out drilling construction at a plurality of down-the-hole drill hole sites 3 in sequence, drilling at the down-the-hole drill hole sites 3 by the down-the-hole drill 6 to form down-the-hole drill holes, and vibrating loose grouting packages 10 around a shield shell 1 at the bottom of the down-the-hole drill holes by a drill bit of the down-the-hole drill 6;
in practical use, when the down-the-hole drill is used for drilling, a drill bit of the down-the-hole drill 6 needs to be always in touch with the grouting package 10, under the effect of air compression, a piston of an impactor arranged at the front end of a drill rod of the down-the-hole drill continuously impacts the drill bit and penetrates into the bottom of a hole to generate impact force for extruding the grouting package 10, air compression enters from an air joint and reaches the bottom of the hole through a hollow drill rod, and the impact is continuously carried out to enable the shield shell 1 to vibrate, so that the package around the shield shell 1 is vibrated and loosened.
The method for drilling the down-the-hole borehole and breaking the grouting package by adopting the borehole coring and the down-the-hole borehole can avoid the influence of shaft excavation on the surrounding environment and the shaft excavation risk, save 20-40 days in the construction period compared with the shaft excavation, and save 200-300 ten thousand yuan in the cost compared with the shaft excavation.
When the method is implemented specifically, after a down-the-hole drill 6 is adopted to drill a down-the-hole drill hole position 3 and the grouting wrapping object 10 at the down-the-hole drill hole position 3 is vibrated, the down-the-hole drill hole can be backfilled, and the stability of the soil body above the shield machine is ensured.
Step six, backfilling the down-the-hole drill hole;
step seven, judging whether the grouting wrap is broken: opening a plurality of ball valves 4 installed in a shield shell 1 of the shield tunneling machine, observing water seepage or mud seepage conditions of the plurality of ball valves 4, when the ball valves 4 do not have water seepage or mud seepage phenomena, indicating that the grouting wrappage 10 is not completely broken, closing the ball valves 4, marking the positions of the ball valves 4 which do not have water seepage or mud seepage phenomena on the ground, and executing the step eight; when water seepage or mud seepage occurs in each ball valve 4, indicating that the grouting wrap 10 is broken, closing the ball valve 4 and executing the step ten;
during the in-service use, a plurality of ball valves 4 are installed to the shield constructs the machine inboard, after accomplishing the drilling construction of all down-the-hole drilling position 3, constructor is in the shield constructs the machine, the ball valve 4 in the accessible shield constructs the machine observes the treatment effect of 1 upper portion slip casting parcel 10 of shield shell, if the treatment effect of 1 upper portion slip casting parcel 10 of shield shell does not reach preset effect, can break again 1 upper portion slip casting parcel 10 of shield shell, and then can effectively guarantee the quality of breaking of shield shell slip casting parcel, guarantee that the tunnelling gesture of shield constructs the machine is controllable.
It should be noted that, there is groundwater generally in the stratum of shield constructs the machine upper portion, and after opening ball valve 4, whether the treatment effect that judges shield shell 1 upper portion slip casting parcel 10 through observing whether the condition that whether ball valve 4 exists infiltration or oozes mud reaches the predetermined effect for constructor can be quick judgement shield shell 1 upper portion slip casting parcel 10's treatment effect, can effectively improve the efficiency of construction.
Step eight, local encryption hole distribution: as shown in fig. 4, marking a plurality of down-the-hole drill hole encrypted hole sites 11 in the local area range of the ground corresponding to the position of the ball valve 4 marked in the step seven;
during actual use, the hole spacing of the down-the-hole drilling encrypted hole sites 11 is smaller than the hole spacing of the down-the-hole drilling hole sites 7, so that the breaking effect of the grouting packages 10 can be effectively improved, and further the upper grouting packages 10 of the shield shell 1 can be completely broken.
In specific implementation, the range of the grouting wrapping 10 on the upper part of the shield shell 1 is equally divided into a plurality of local areas according to the number of the ball valves 4 in the shield shell 1, and each ball valve 4 corresponds to one local area.
Step nine, repeating the step five to the step seven;
and step ten, the shield tunneling machine recovers tunneling.
In practical use, after the crushing effect of the grouting wrappage 10 on the upper part of the shield shell 1 reaches the preset effect, the posture of the shield machine can be controlled, so that the shield machine can be recovered to tunnel and continue construction.
As shown in fig. 2, in the second step, when coring is performed in the geological drilling, the geological drilling position 7 is marked in turn from inside to outside at the position of the shield machine located on the ground, and the geological drilling position 7 is cored in turn from inside to outside by using the geological drilling 2, and the concrete process is as follows:
step 201, firstly, drilling and coring are carried out at the center of the position of the shield machine positioned on the ground by adopting a geological drill, a central geological drill hole 5 with a grouting wrapping object 10 on the upper part of a shield shell 1 is determined, and a hole position corresponding to the central geological drill hole 5 is used as a first circle of geological drill hole position;
202, arranging an i +1 th circle of geological drilling position on the ground outside the i +1 th circle of geological drilling position, drilling and coring the i +1 th circle of geological drilling position, judging whether a core sample corresponding to the i +1 th circle of geological drilling position has a grouting wrap 10, and executing a step 203 when the core sample corresponding to the i +1 th circle of geological drilling position has the grouting wrap 10; when the core sample corresponding to the i +1 th geological drilling position has no grouting wrapping 10, executing step 204;
wherein i is a positive integer, and when i is equal to 1, the first circle of geological drilling positions are the hole positions corresponding to the central geological drilling holes 5, and only one hole position corresponding to the central geological drilling holes 5 is provided; when i is greater than 1, each circle of geological drilling sites comprises a plurality of geological drilling sites 7;
step 203, regarding the (i + 1) th geological drilling position as the (i) th geological drilling position, and executing step 202;
204, arranging a stop ring geological drilling position between the ith ring of geological drilling position and the (i + 1) th ring of geological drilling position, wherein the stop ring geological drilling position comprises a plurality of geological drilling positions 7, and when a core sample corresponding to the stop ring geological drilling position is provided with a grouting wrap 10, connecting lines of the plurality of geological drilling positions 7 in the (i + 1) th ring of geological drilling positions are used as the boundary of the range of the grouting wrap 10 on the upper part of the shield shell 1; when the core sample corresponding to the geological drilling position of the termination circle has no grouting wrap 10, connecting lines of a plurality of geological drilling positions 7 in the geological drilling position of the termination circle are used as the boundary of the range of the grouting wrap 10 on the upper part of the shield shell 1.
During the in-service use, adopt the total powerstation to fix a position the back to the shield structure machine subaerial, need mark out the central line of shield structure machine simultaneously, when confirming central geology drilling 5 at shield shell 1 upper portion slip casting parcel position center, can arrange geology drilling position 7 in the intermediate position department of the central line of shield structure machine and carry out geology drilling and get the core, get and determine central geology drilling 5 after having slip casting parcel 10, can effectively improve work efficiency.
It should be noted that, after the central geological borehole 5 centered on the position of the grouting envelope 10 on the upper part of the shield shell 1 is determined, one or more circles of geological drilling positions 7 are arranged on the outer ring of the central geological drilling hole 5 from inside to outside at intervals of 1m from the periphery in sequence for drilling and coring, meanwhile, the ground elevation is measured, the distance between the ground of each geological drilling hole and the shield shell 1 of the shield machine is calculated, the coating thickness of the mortar is known, when finding that the geological drilling in one circle has coring without coating mortar, the drill rod moves back inwards by 0.5m, and whether the coring has the mortar is determined after the geological drilling is constructed, as shown in FIG. 2, when the sand slurry is cored, the range of the connecting line of the geological drilling positions 7 at the outermost circle is taken as the processing range of the wrappage, the connecting line of the geological drilling positions 7 at the outermost circle is taken as a first boundary 8, namely, the connecting line of a plurality of geological drilling positions 7 in the (i + 1) th circle of geological drilling positions is a first boundary 8; if the geological drilling hole constructed after retracting 0.5m inwards is cored without mortar, the range of the connecting line of the geological drilling positions 7 retracted 0.5m is taken as the processing range of the wrapper, the connecting line of the geological drilling positions 7 retracted 0.5m is taken as a second boundary 9, and namely the connecting line of a plurality of geological drilling positions 7 in the geological drilling position of the stop circle is taken as the second boundary 9.
During specific implementation, no mortar exists in the drill holes of the geological drilling positions 7 corresponding to the first boundary 8 and the second boundary 9 after coring, so that the accuracy and the integrity of the range of the marked grouting wrapping 10 on the upper part of the shield shell 1 are ensured.
In the embodiment, when backfilling of geological drilling is carried out in the third step, when drilling coring of the next geological drilling position 7 is carried out after drilling coring of each geological drilling position 7 is finished in the second step, the previous geological drilling is backfilled synchronously; and backfilling the last geological drill hole after the drill hole coring of the last geological drill hole position 7 is finished.
When the method is actually used, when geological drilling is backfilled, the method of filling while drilling is adopted, the stability of the upper soil body of the shield machine can be ensured, and the phenomenon that the upper soil body of the shield machine collapses to further influence the normal tunneling of the shield machine is avoided.
In this embodiment, the boundary of the range of the grouting package 10 marked in step two is a rectangular boundary.
During actual use, the connecting line of each circle of geological drilling position 7 outside the central geological drilling 5 at the center of the grouting wrapping object 10 at the upper part of the shield shell 1 is rectangular, so that the determined range of the upper part of the shield shell 1 wrapped by mortar is more practical.
In the fifth embodiment, in the fifth step, when the down-the-hole drill is used for breaking the grouting package, the pressure regulating tissue is pushed to continuously push the drilling tool of the down-the-hole drill 6, and the drill bit of the down-the-hole drill 6 is always touched with the grouting package 10 until the grouting package 10 around the shield shell 1 at the bottom of the down-the-hole drill is vibrated and loosened, so that the grouting package 10 is broken; and when the drill bit of the down-the-hole drill 6 touches the grouting package 10, the drilling tool of the down-the-hole drill 6 circularly rotates forwards and backwards.
In practical use, when the down-the-hole drill is used for breaking the grouting wrappage, the drill of the down-the-hole drill 6 is made to rotate forwards and backwards circularly, so that repeated impact of a drill bit of the down-the-hole drill 6 on the same chisel mark is avoided, shearing force with a scraping effect on the grouting wrappage 10 is generated, and the grouting wrappage 10 is continuously crushed and sheared under the impact force of a piston of an impactor and the shearing force effect of a reverse rotation tissue.
In the embodiment, when backfilling of the down-the-hole drill hole is performed in the sixth step, when drilling construction of the next down-the-hole drill hole position 3 is performed after drilling construction of each down-the-hole drill hole position 3 is completed in the fifth step, the previous down-the-hole drill hole is backfilled synchronously; and after the drilling construction of the last down-the-hole drill hole position 3 is finished, backfilling the last down-the-hole drill hole.
In actual use, when backfilling of down-the-hole drilling is carried out, medium sand is adopted to backfill in the depth range within 1m from the position 1 of the shield shell of the shield machine in the down-the-hole drilling, and cement mortar is adopted to backfill to the ground position in the depth range within more than 1m from the position 1 of the shield shell of the shield machine in the down-the-hole drilling.
In this embodiment, the geological drilling in the second step and the down-the-hole drilling in the fifth step are both vertically arranged.
During actual use, the down-the-hole drilling holes and the geological drilling holes are vertically distributed, so that the drilling depths of the down-the-hole drilling holes and the geological drilling holes can be conveniently controlled according to the vertical distance between the ground at each geological drilling position 7 marked on a design drawing and the shield shell 1 of the shield machine, and the structure of the shield shell 1 of the shield machine can be effectively prevented from being damaged by the drill bit of the geological drill 2 or the down-the-hole drill 6.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (7)
1. A method for processing a shield shell grouting wrap of a shield tunneling machine is characterized by comprising the following steps:
firstly, stopping a shield tunneling machine;
step two, coring the drill hole of the geological drill to determine the range of the grouting wrappage: the method comprises the steps that a total station is adopted to position the position of the shield machine on the ground above the shield machine, a plurality of circles of geological drilling positions are marked at the position of the shield machine positioned on the ground, a geological drill (2) is adopted to drill and core on the marked geological drilling positions, the range of a grouting wrap (10) at the upper part of a shield shell (1) is determined, the boundary of the range of the determined grouting wrap (10) is marked, and the geological drill (2) performs drilling and coring on the marked geological drilling positions to form geological drilling holes;
backfilling the geological drilling hole;
step four, marking the position of the down-the-hole drill hole: marking a plurality of down-the-hole drilling positions (3) in the range according to the range of the grouting wrappage (10) marked in the step two;
fifthly, breaking grouting packages: adopting a down-the-hole drill (6) to carry out drilling construction at a plurality of down-the-hole drilling positions (3) in sequence, drilling at the down-the-hole drilling positions (3) by the down-the-hole drill (6) to form down-the-hole drilling holes, and vibrating and loosening grouting wrappings (10) around a shield shell (1) at the bottom of the down-the-hole drilling holes by a drill bit of the down-the-hole drill (6);
step six, backfilling the down-the-hole drill hole;
step seven, judging whether the grouting wrap is broken: opening a plurality of ball valves (4) installed in a shield shell (1) of the shield machine, observing the water seepage or mud seepage conditions of the ball valves (4), when the ball valves (4) do not have the water seepage or mud seepage phenomenon, indicating that the grouting wrappage (10) is not completely broken, closing the ball valves (4), marking the positions of the ball valves (4) which do not have the water seepage or mud seepage phenomenon on the ground, and executing the step eight; when water seepage or mud seepage occurs in each ball valve (4), indicating that the grouting wrappage (10) is broken, closing the ball valve (4) and executing the step ten;
step eight, local encryption hole distribution: marking a plurality of down-the-hole drilling encrypted hole sites (11) in the ground local area range corresponding to the position of the ball valve (4) marked in the step seven;
step nine, regarding the down-the-hole drilling encrypted hole site (11) as a down-the-hole drilling hole site (3), and repeating the step five to the step seven;
and step ten, the shield tunneling machine recovers tunneling.
2. The method for treating the shield shell grouting package of the shield tunneling machine according to claim 1, wherein the method comprises the following steps: in the second step, when carrying out geology and boring the drilling and coring, the shield machine's of subaerial location position department from interior to exterior marks many circles in proper order geology drilling position (7), adopts geology to bore (2) from interior to exterior simultaneously and is in proper order many circles geology drilling position (7) are drilled and are cored, and concrete process is as follows:
step 201, firstly, drilling and coring are carried out on the center of the position of the shield machine positioned on the ground by adopting a geological drill, a central geological drill hole (5) with a grouting wrap (10) on the upper part of a shield shell (1) is determined, and a hole position corresponding to the central geological drill hole (5) is used as a first circle of geological drill hole position;
202, arranging an i +1 th circle of geological drilling position on the ground outside the i +1 th circle of geological drilling position, drilling and coring the i +1 th circle of geological drilling position, judging whether a core sample corresponding to the i +1 th circle of geological drilling position has a grouting wrap (10), and executing a step 203 when the core sample corresponding to the i +1 th circle of geological drilling position has the grouting wrap (10); when the core sample corresponding to the (i + 1) th geological drilling position has no grouting wrapping object (10), executing step 204;
when i is equal to 1, the first circle of geological drilling positions are the hole positions corresponding to the central geological drilling holes (5), and only one hole position corresponding to the central geological drilling holes (5) is provided; when i is greater than 1, each circle of geological drilling sites comprises a plurality of geological drilling sites (7);
step 203, regarding the (i + 1) th geological drilling position as the (i) th geological drilling position, and executing step 202;
204, arranging a stop ring geological drilling position between the ith ring of geological drilling position and the (i + 1) th ring of geological drilling position, wherein the stop ring geological drilling position comprises a plurality of geological drilling positions (7), and when a core sample corresponding to the stop ring geological drilling position is provided with a grouting wrap (10), connecting lines of the plurality of geological drilling positions (7) in the (i + 1) th ring of geological drilling positions are used as the boundary of the range of the grouting wrap (10) on the upper part of the shield shell (1); when the core sample corresponding to the geological drilling position of the termination ring has no grouting wrap (10), connecting lines of a plurality of geological drilling positions (7) in the geological drilling position of the termination ring are used as the boundary of the range of the grouting wrap (10) on the upper part of the shield shell (1).
3. The method for treating the shield shell grouting package of the shield tunneling machine according to claim 2, wherein the method comprises the following steps: when backfilling of geological drilling holes is carried out in the third step, when drilling coring of the next geological drilling hole (7) is carried out after drilling coring of each geological drilling hole (7) in the second step is finished, backfilling is carried out on the former geological drilling hole synchronously; and when the drilling coring of the last geological drilling position (7) is finished, backfilling the last geological drilling.
4. The method for treating the shield shell grouting package of the shield tunneling machine according to claim 1, wherein the method comprises the following steps: and the boundary of the range of the grouting wrap (10) marked in the second step is a rectangular boundary.
5. The method for treating the shield shell grouting package of the shield tunneling machine according to claim 1, wherein the method comprises the following steps: in the fifth step, when the down-the-hole drill is used for breaking the grouting wrappage, the pressure regulating tissue is pushed to enable the drilling tool of the down-the-hole drill (6) to be continuously pushed, and the drill bit of the down-the-hole drill (6) is always touched with the grouting wrappage (10) until the grouting wrappage (10) around the shield shell (1) at the bottom of the down-the-hole drill is vibrated to be loosened, so that the grouting wrappage (10) is broken; and when the drill bit of the down-the-hole drill (6) touches the grouting wrapping object (10), the drilling tool of the down-the-hole drill (6) circularly rotates forwards and backwards.
6. The method for treating the shield shell grouting package of the shield tunneling machine according to claim 1, wherein the method comprises the following steps: when backfilling of the down-the-hole drill hole is carried out in the sixth step, when the drilling construction of the next down-the-hole drill hole position (3) is carried out after the drilling construction of each down-the-hole drill hole position (3) in the fifth step is finished, the backfilling is synchronously carried out on the previous down-the-hole drill hole; and when the drilling construction of the last down-the-hole drilling position (3) is finished, backfilling the last down-the-hole drilling.
7. The method for treating the shield shell grouting package of the shield tunneling machine according to claim 1, wherein the method comprises the following steps: and (4) vertically distributing the geological drilling holes in the step two and the down-the-hole drilling holes in the step five.
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