CN110578524A - Boulder treatment construction method for dense drilling and crushing in shield region - Google Patents
Boulder treatment construction method for dense drilling and crushing in shield region Download PDFInfo
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- CN110578524A CN110578524A CN201910798062.4A CN201910798062A CN110578524A CN 110578524 A CN110578524 A CN 110578524A CN 201910798062 A CN201910798062 A CN 201910798062A CN 110578524 A CN110578524 A CN 110578524A
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- grouting
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- 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
-
- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
- E21D9/002—Injection methods characterised by the chemical composition used
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
the invention discloses a boulder treatment construction method for densely drilling and crushing in a shield region, which comprises the following steps of: s1, pre-measuring the area to be constructed, and then drilling the area to be constructed from the ground to the ground bottom; s2, determining grouting hole positions on a plurality of drill holes which are equidistantly arranged on the construction molding plane; s3, carrying out cement plugging on the drill holes outside the grouting hole positions, and waiting for natural solidification of cement after plugging; s4, performing sleeve valve pipe grouting on all grouting hole sites, namely vertically extending a plurality of sleeve valve pipes into the grouting holes to a certain depth and then performing grouting filling; and S5, after the sleeve valve tube grouting process is finished, pulling out the sleeve valve tube, and filling and sealing gaps left by the sleeve valve tube in the grouting hole by cement. The technical scheme of the invention has the technical effects of high construction efficiency, low construction cost and good protection on the structure of the stratum, and can be widely applied to the technical field of building construction.
Description
Technical Field
The invention relates to the technical field of building construction. More specifically, the invention relates to a construction method for treating boulders by intensive drilling and crushing in a shield region.
background
in the prior art, the boulder is usually processed by adopting an underground deep hole blasting mode, and the construction mode has the following defects:
Firstly, the construction cost is high, the blasting examination and approval are complicated, and the time consumption is long;
Secondly, rock blocks with larger diameters are still easy to remain after the boulders are crushed, and the risk of a cutter clamping disc or a screw machine is left;
thirdly, instability of an overlying soil layer in the boulder area is easily caused by blasting disturbance, and control of surface subsidence in the shield tunneling process is not facilitated;
Fourthly, the explosion mode is adopted to treat the boulder vibration, so that the influence is large, and the protection of peripheral pipelines and structures is not good.
Disclosure of Invention
The invention aims to provide a method for treating and constructing the boulder with the dense drilling and crushing functions in the shield region, which has high construction efficiency and low construction cost and can well protect the structure of the stratum.
to achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a method for treating an orphan stone by dense drilling and crushing in a shield zone, comprising the steps of:
S1, pre-measuring the area to be constructed to enable the width of the area to be constructed to be larger than the diameter of a shield machine enough for placing the shield machine, and then drilling the measured area to be constructed from the ground to the ground bottom to form a construction forming plane with a plurality of drill holes arranged at equal intervals;
S2, determining grouting hole positions by a plurality of drill holes which are equidistantly arranged on the construction molding plane in the step S1, firstly, randomly determining one drill hole on the construction molding plane as a basic hole position, carrying out equidistant measurement on the basic hole position according to the transverse direction and the longitudinal direction, defining a specific distance value, determining a second basic hole position, then, taking the second basic hole position as an original point, repeating the steps until all grouting hole positions on the construction molding plane are determined and marked;
S3, carrying out cement plugging on the drill holes outside the grouting hole position in the step S2, and waiting for natural solidification of cement after plugging;
S4, performing sleeve valve pipe grouting on all grouting hole positions determined in the step S2, namely, vertically extending a plurality of sleeve valve pipes into the grouting holes by a certain depth and then performing grouting filling;
wherein, the grouting process is stopped when grouting occurs in the hole positions around the grouting hole position or the peripheral earth surface has a swelling sign;
and S5, after the sleeve valve tube grouting process in the step S4 is completed, the sleeve valve tube is pulled out, and gaps left by the sleeve valve tube in the grouting hole are filled with cement and sealed.
Preferably, the grouting hole locations on the forming plane in step S2 further include a distribution pattern,
When any four adjacent grouting hole sites are distributed in a square shape, the hole sites at the intersection midpoints of the diagonals of the four corners of the square are also set as grouting hole sites and marked.
preferably, when the drilling holes other than the grouting holes are plugged by cement in step S3, it is determined whether the geology below the hole level in the area is a normal water level area, and if so, dry cement powder is directly filled in the drilling holes above the normal water level area. If not, pouring the prefabricated cement paste into the hole
Preferably, in the drilling construction in step S1, the distance between two adjacent drill holes is 30cm by 30cm, the hole diameter of the drill hole is 110mm, and the average drill hole depth is more than 50 cm.
Preferably, in the step S2, the distance between two adjacent grouting holes is 1.2m × 1.2m in the transverse and longitudinal arrangement.
Preferably, the sleeve valve tube grouting process in step S5 includes,
dividing a construction molding plane into a plurality of grouting construction areas, selecting a grouting hole position of a first grouting construction area, sequentially and vertically inserting sleeve valve pipes, inserting the sleeve valve pipes into the grouting hole position, enabling the upper ends of the sleeve valve pipes to be higher than the grouting hole position by more than 20cm, and grouting the sleeve valve pipes in the first grouting construction area;
And after the first grouting construction area finishes grouting, the interval time is up to the first grouting construction area for grouting and drying, a second grouting construction area is selected, and the steps are repeated until grouting hole position grouting construction of the whole construction molding plane is finished.
preferably, the grouting at the grouting hole position is prepared by the following steps:
a1, stirring and mixing 80 parts by mass of water, 25 parts by mass of cement, 15 parts by mass of fine sand and 3 parts by mass of polypropylene fiber to obtain a mixed material;
a2, mixing and stirring 20 parts by mass of water, 3 parts by mass of gypsum powder, 3 parts by mass of Minggua powder, 3 parts by mass of 3-polyacrylic acid zinc and 3 parts by mass of 3-propylene glycol ether for 3min, and rapidly heating to 80-85 ℃ to obtain a modified material;
a3, mixing the mixture refining material in the step A1 and the modified material obtained by heating in the step A2 quickly for 15min to obtain grouting.
the invention at least comprises the following beneficial effects:
1. The boulder treatment effect is obvious, with low costs, utilizes the rig to drill the boulder underground to make it form honeycomb, compares with the mode through underground blasting among the prior art, and the effect is better, and saves construction cost and the blasting has the uncertainty, probably can make the boulder after the blasting still have great rubble piece, and the rig is perpendicular to ground carry out progressive drilling, can reach even boulder treatment effect.
2. The ground is prevented from collapsing, the safety of a construction area is guaranteed, great damage and vibration can be caused to the construction area from the ground to the top during blasting, walking and construction of other heavy machinery on the construction surface are not facilitated, drilling is carried out through a drilling machine, then concrete is recycled for pouring, and normal construction of a soil body structure on the ground is guaranteed.
3. and the surrounding buildings are protected from being influenced by construction.
additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
drawings
Fig. 1 is a construction forming plan view of the construction method for treating the boulder by densely drilling and crushing in the shield region.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The invention provides a boulder treatment construction method for densely drilling and crushing in a shield region, which comprises the following steps of:
s1, pre-measuring the area to be constructed to enable the width of the area to be constructed to be larger than the diameter of a shield machine enough for placing the shield machine, and then drilling the measured area to be constructed from the ground to the ground bottom to form a construction forming plane with a plurality of drill holes arranged at equal intervals;
S2, determining grouting hole positions 1 by a plurality of drill holes which are equidistantly arranged on the construction molding plane in the step S1, firstly, randomly determining one drill hole on the construction molding plane as a basic hole position, carrying out equidistant measurement on the basic hole position according to the transverse direction and the longitudinal direction, defining a specific distance value, determining a second basic hole position, then, taking the second basic hole position as an original point, repeating the steps until all grouting hole positions 1 on the construction molding plane are determined and marked;
s3, carrying out cement plugging on the drill holes outside the grouting hole position 1 in the step S2, and waiting for natural solidification of cement after plugging;
s4, performing sleeve valve pipe grouting process on all grouting hole positions 1 determined in the step S2, namely, vertically extending a plurality of sleeve valve pipes into the grouting holes for a certain depth and then performing grouting filling;
wherein, the grouting process is stopped when grouting occurs in the hole positions around the grouting hole position 1 or the peripheral earth surface has a swelling sign;
And S5, after the sleeve valve tube grouting process in the step S4 is completed, the sleeve valve tube is pulled out, and gaps left by the sleeve valve tube in the grouting hole are filled with cement and sealed.
In another technical solution, the grouting holes 1 on the construction molding plane in step S2 further include the following distribution pattern,
When any four adjacent grouting hole sites 1 are distributed in a square shape, the hole sites at the intersection midpoints of the diagonals of the four corners of the square are also set as the grouting hole sites 1 and marked.
according to the technical scheme, the purpose of weakening the strength of the boulder is achieved through a dense drilling mode, the processed boulder is effectively filled and wrapped through drilling, backfilling and grouting, and the surrounding stratum of the boulder is fixed and connected to a certain degree.
Compared with blasting construction, the method of the embodiment can effectively reinforce the overburden layer after the boulder treatment by taking measures of backfill grouting and dry cement backfill hole sealing, can obviously improve the stratum stability after the boulder treatment, is beneficial to controlling the ground surface settlement in the shield tunneling process, and simultaneously avoids the phenomena of difficult pressure building or ground grout leakage when the shield passes through.
compared with the blasting method for treating the boulder, the method of the embodiment cancels the blasting construction of the boulder, greatly saves the construction period and cost for treating the boulder, avoids the adverse environmental influences of noise, dust and the like caused by blasting, and is beneficial to the control of surface subsidence and the protection of peripheral pipelines and structures.
in another technical scheme, when the drilling holes except the grouting hole are plugged by cement in the step S3, whether the geology below the hole position in the area is a normal water level area is determined, and if so, dry cement powder is directly filled in the drilling holes above the normal water level area. If not, pouring the prefabricated cement paste into the hole
In another technical scheme, in the drilling construction of the step S1, according to the transverse and longitudinal arrangement mode, the distance between two adjacent drilling holes is 30cm by 30cm, the hole diameter of the drilling hole is 110mm, and the average drilling depth is more than 50 cm.
in another technical solution, in the confirming step of the grouting holes 1 in step S2, the distance between two adjacent grouting holes 1 is 1.2m × 1.2m according to the transverse and longitudinal arrangement.
in another technical solution, the sleeve valve tube grouting process in step S5 includes,
dividing a construction molding plane into a plurality of grouting construction areas, then selecting a grouting hole position 1 of a first grouting construction area to perform the process operation of sequentially and vertically inserting sleeve valve pipes, after the sleeve valve pipes are inserted into the grouting hole position 1, enabling the upper ends of the sleeve valve pipes to be higher than the grouting hole position by more than 120cm, and then grouting the sleeve valve pipes in the first grouting construction area;
And after the first grouting construction area finishes grouting, performing grouting drying in the first grouting construction area at intervals, selecting a second grouting construction area, and repeating the steps until grouting construction of a grouting hole position 1 of the whole construction molding plane is finished.
In another technical scheme, the grouting at the grouting hole position 1 is prepared by the following steps:
a1, stirring and mixing 80 parts by mass of water, 25 parts by mass of cement, 15 parts by mass of fine sand and 3 parts by mass of polypropylene fiber to obtain a mixed material;
a2, mixing and stirring 20 parts by mass of water, 3 parts by mass of gypsum powder, 3 parts by mass of Minggua powder, 3 parts by mass of 3-polyacrylic acid zinc and 3 parts by mass of 3-propylene glycol ether for 3min, and rapidly heating to 80-85 ℃ to obtain a modified material;
a3, mixing the mixture refining material in the step A1 and the modified material obtained by heating in the step A2 quickly for 15min to obtain grouting.
in the technical scheme, the gypsum powder and the Mingguang powder have the effect of expanding concrete, and are matched with the 3-zinc polyacrylate and the 3-propylene glycol ether, so that the toughness and the ductility of the concrete can be enhanced, further, the formation gap after drilling is greatly consolidated, and the conditions of local collapse and the like of the shield tunneling machine during construction are ensured.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (7)
1. the construction method for treating the boulder for densely drilling and crushing in the shield region is characterized by comprising the following steps of:
S1, pre-measuring the area to be constructed to enable the width of the area to be constructed to be larger than the diameter of a shield machine enough for placing the shield machine, and then drilling the measured area to be constructed from the ground to the ground bottom to form a construction forming plane with a plurality of drill holes arranged at equal intervals;
s2, determining grouting hole positions by a plurality of drill holes which are equidistantly arranged on the construction molding plane in the step S1, firstly, randomly determining one drill hole on the construction molding plane as a basic hole position, carrying out equidistant measurement on the basic hole position according to the transverse direction and the longitudinal direction, defining a specific distance value, determining a second basic hole position, then, taking the second basic hole position as an original point, repeating the steps until all grouting hole positions on the construction molding plane are determined and marked;
S3, carrying out cement plugging on the drill holes outside the grouting hole position in the step S2, and waiting for natural solidification of cement after plugging;
S4, performing sleeve valve pipe grouting on all grouting hole positions determined in the step S2, namely, vertically extending a plurality of sleeve valve pipes into the grouting holes by a certain depth and then performing grouting filling;
Wherein, the grouting process is stopped when grouting occurs in the hole positions around the grouting hole position or the peripheral earth surface has a swelling sign;
And S5, after the sleeve valve tube grouting process in the step S4 is completed, the sleeve valve tube is pulled out, and gaps left by the sleeve valve tube in the grouting hole are filled with cement and sealed.
2. The method of claim 1, wherein the grouting holes on the forming plane in step S2 are distributed in such a way that,
when any four adjacent grouting hole sites are distributed in a square shape, the hole sites at the intersection midpoints of the diagonals of the four corners of the square are also set as grouting hole sites and marked.
3. the method for treating and constructing the boulder in the shield zone for densely drilling and breaking the boulder, according to claim 1, when the drilling holes except the grouting hole are plugged by cement in the step S3, it is firstly determined whether the geology below the inner hole position of the region is a normal water level region, if so, dry cement powder is directly filled in the drilling holes above the normal water level region, and if not, prefabricated cement slurry is poured into the drilling holes.
4. the method of claim 1, wherein in the step S1, the distance between two adjacent holes is 30cm by 30cm, the hole diameter is 110mm, and the average hole depth is 50cm or more.
5. the method of claim 1, wherein in the step of confirming the grouting holes in step S2, the distance between two adjacent grouting holes is 1.2m by 1.2m in the transverse and longitudinal arrangement.
6. The boulder handling construction method for densely drilling and breaking in a shield zone according to claim 1, wherein the sleeve valve tube grouting process in step S5 includes,
Dividing a construction molding plane into a plurality of grouting construction areas, selecting a grouting hole position of a first grouting construction area, sequentially and vertically inserting sleeve valve pipes, inserting the sleeve valve pipes into the grouting hole position, enabling the upper ends of the sleeve valve pipes to be higher than the grouting hole position by more than 20cm, and grouting the sleeve valve pipes in the first grouting construction area;
And after the first grouting construction area finishes grouting, the interval time is up to the first grouting construction area for grouting and drying, a second grouting construction area is selected, and the steps are repeated until grouting hole position grouting construction of the whole construction molding plane is finished.
7. the construction method for treating the boulder broken by densely drilling in the shield area according to claim 1, wherein grouting at the grouting hole position is performed by the following steps:
A1, stirring and mixing 80 parts by mass of water, 25 parts by mass of cement, 15 parts by mass of fine sand and 3 parts by mass of polypropylene fiber to obtain a mixed material;
A2, mixing and stirring 20 parts by mass of water, 3 parts by mass of gypsum powder, 3 parts by mass of Minggua powder, 3 parts by mass of 3-polyacrylic acid zinc and 3 parts by mass of 3-propylene glycol ether for 3min, and rapidly heating to 80-85 ℃ to obtain a modified material;
a3, mixing the mixture refining material in the step A1 and the modified material obtained by heating in the step A2 quickly for 15min to obtain grouting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910798062.4A CN110578524A (en) | 2019-08-27 | 2019-08-27 | Boulder treatment construction method for dense drilling and crushing in shield region |
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| CN201910798062.4A CN110578524A (en) | 2019-08-27 | 2019-08-27 | Boulder treatment construction method for dense drilling and crushing in shield region |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980717A (en) * | 2020-08-31 | 2020-11-24 | 中铁一局集团有限公司 | Method for processing shield shell grouting wrappage of shield tunneling machine |
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Application publication date: 20191217 |