CN214169034U - High backfill region digs soon and bores hole and adopts mortar consolidation structure that collapses - Google Patents
High backfill region digs soon and bores hole and adopts mortar consolidation structure that collapses Download PDFInfo
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- CN214169034U CN214169034U CN202022808834.9U CN202022808834U CN214169034U CN 214169034 U CN214169034 U CN 214169034U CN 202022808834 U CN202022808834 U CN 202022808834U CN 214169034 U CN214169034 U CN 214169034U
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- hole
- pile
- concrete mixture
- mortar
- backfill
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 20
- 238000007596 consolidation process Methods 0.000 title claims abstract description 15
- 238000005553 drilling Methods 0.000 claims abstract description 29
- 239000004567 concrete Substances 0.000 claims abstract description 24
- 239000002689 soil Substances 0.000 claims abstract description 24
- 239000011083 cement mortar Substances 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 21
- 239000011435 rock Substances 0.000 claims abstract description 6
- 235000019738 Limestone Nutrition 0.000 claims description 10
- 239000006028 limestone Substances 0.000 claims description 10
- 238000010276 construction Methods 0.000 abstract description 20
- 239000004575 stone Substances 0.000 abstract description 14
- 239000002699 waste material Substances 0.000 abstract description 7
- 238000001125 extrusion Methods 0.000 abstract description 5
- 239000013049 sediment Substances 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000003818 cinder Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a high backfill area rotary drilling collapse hole adopts mortar consolidation structure, including middle stroke tuff and similar concrete mixture in upper portion, the similar concrete mixture in upper portion and middle stroke tuff rock-socketed portion form an integral stable hole pile dado lattice system; the similar concrete mixture is formed by performing reverse drilling extrusion on the poured cement mortar by using a rotary drilling bit and performing effective penetration consolidation on the soil body around the hole pile. The utility model discloses to handle the high structure loose of backfilling, newly advance backfill, throw and fill formation, thickness is inhomogeneous, ground poor stability, carries out mechanical pore-forming prevention its hole of collapsing in the mountain rock, the piece stone sediment waste residue soil texture that the bearing capacity is low, smooth pore-forming ensures the safety and stability ability of the peripheral soil texture of pile foundation, and this improves the construction progress to digging the bored concrete pile soon, practices thrift construction cost and has the significance.
Description
Technical Field
The utility model relates to a high backfill district digs soon and bores hole of collapsing and adopts mortar consolidation structure belongs to construction technical field.
Background
The construction of a backfill rotary-digging cast-in-place pile is an important technology in construction engineering, and in the prior art, for example, an invention patent (with the publication number being CN108149681A) applied by the Wujian group of Shanghai construction company Limited discloses a combined steel pile casing for a backfill rotary-digging cast-in-place pile and a construction method thereof, and belongs to the technical field of rotary-digging cast-in-place pile construction. The combined steel protective cylinder is formed by sequentially splicing a plurality of steel protective cylinder units, is arranged on the upper side and the lower side of a splicing seam, and is provided with a plurality of upper connecting lug plates and lower connecting lug plates which appear in pairs respectively, and the upper connecting lug plates and the lower connecting lug plates are correspondingly provided with a first connecting hole and a second connecting hole respectively and are connected through bolts. For another example, an invention patent (publication number CN111749230A) applied by the eleventh architecture limited company in sichuan province discloses an ultra-long rotary-digging cast-in-place pile, which includes a rotary-digging cast-in-place pile body, wherein a pile casing is arranged in the rotary-digging cast-in-place pile body, a reinforcement cage is arranged on the inner wall of the pile casing, and slurry is injected into the pile casing; adopt above-mentioned scheme, set up and protect a section of thick bamboo as the pore-forming armguard of digging bored concrete pile soon, utilize and dig the machine soon and get earth pore-forming in protecting a section of thick bamboo, can effectively avoid appearing collapsing, prevent that debris from getting into the stake hole for final scarfing cinder speed piece adopts mud to carry out the armguard, can stabilize the downthehole water level of stake, be convenient for carry the drilling mud, and the effectual hole phenomenon of collapsing that prevents appears in the stake hole.
Although the rotary excavating filling pile technology is improved to a certain extent, the rotary excavating filling pile still has many defects, mainly in the construction of the rotary excavating filling pile, a high backfill area is mostly backfilled by stone slag and waste residues due to backfilling soil, the structure is loose and uneven, the thickness change is large, the uniformity of a foundation is poor, dead weight consolidation is incomplete, hole collapse phenomenon is serious in the process of drilling due to instability, and it is necessary to research out a mortar consolidation hole pile peripheral soil body formed by rotary excavating drilling hole collapse in the high backfill area on the basis of the prior art, and hole collapse phenomenon is prevented from occurring again, so that the construction cost is effectively reduced, and the construction progress is accelerated.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the problem will be solved is that soil texture structure is loose, and thickness is inhomogeneous, and the high backfill district drilling collapse hole of ground poor stability and the construction progress lag scheduling problem that can't be under construction and lead to.
The technical scheme of the utility model as follows:
a mortar consolidation structure is adopted for rotary drilling collapse holes in a high backfill region, and comprises middle stroke tuff and similar concrete mixture on the upper part of the middle stroke tuff, wherein the similar concrete mixture on the upper part and the rock embedding part of the middle stroke tuff form an integral stable hole pile retaining wall lattice system; the similar concrete mixture is formed by performing reverse drilling extrusion on the poured cement mortar by using a rotary drilling bit and performing effective penetration consolidation on the soil body around the hole pile.
The structure of the utility model is that the rotary drilling bit is used for backward drilling and extruding the poured cement mortar, and the soil body around the hole pile is effectively permeated by the fluidity of the cement mortar and the extrusion external force of the bit; after the mortar reaches a certain strength and has good plasticity, the cement mortar concretes the soil body around the hole pile; and re-drilling the weathered limestone bearing layer in the bottom of the pile by using a rotary drilling bit to enable the upper part similar to the concrete mixture and the weathered limestone rock-socketed part to form an integral stable hole pile retaining wall lattice system.
Furthermore, the soil body around the hole pile is of a loose structure formed by high-depth backfilling, new backfilling and throwing filling, and has uneven thickness, poor foundation stability and low bearing capacity.
Further, the method comprises the following steps of adopting different strength mortar consolidation effects under different conditions: adopting M20 cement mortar for consolidation aiming at the block and gravel content of 50-60%; solidifying the blocks and the gravels with the content of 40 to 50 percent by adopting M15 cement mortar; for the block and gravel content of 30-40%, M10 cement mortar is adopted for consolidation, so that hole collapse can be effectively prevented from being formed smoothly;
furthermore, the method also comprises the step that a drill bit is used for stirring mortar and aggregate such as sediment at the bottom of the hole or stone chips to form a mixture similar to a concrete form, the mixture is extruded outside the soil body at the periphery of the hole pile, backfill materials such as stone slag, waste slag, mountain split stone and the like are sealed in the mixture, and the upper protection wall and the rock embedding part of the middle weathered limestone bearing layer form a complete and stable hole pile protection wall structure, so that the problem of construction progress lag caused by hole collapse of the hole pile in a high backfill area is effectively solved, and the construction cost is effectively saved.
Compared with the prior art, the utility model discloses to handle the high loose structure of backfilling, newly advancing backfill, throwing fill formation, thickness is inhomogeneous, ground poor stability, carries out mechanical pore-forming prevention its hole of collapsing in the mountain split stone that the bearing capacity is low, the piece stone sediment waste residue soil property, and smooth pore-forming ensures the safety and stability performance of the peripheral soil property of pile foundation, and this improves the construction progress to digging the bored concrete pile soon, practices thrift construction cost and has the significance.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a diagram showing the hole forming effect of the present invention;
fig. 3 is a sectional view taken along line a-a in fig. 2.
The labels in the figures are: 1-rotary drilling bit, 2-cement mortar, 3-soil body around the hole pile, 4-similar concrete mixture and 5-weathered limestone.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The method of the utility model mainly uses the rotary drilling rig 1 to perform the back drilling extrusion on the poured cement mortar 2, and effectively permeates the soil body 3 around the hole pile by depending on the fluidity of the mortar and the extrusion external force of the drilling rig; after the mortar reaches a certain strength and has good plasticity, the soil body 3 around the hole pile is consolidated by the cement mortar 2, meanwhile, the cement mortar 2 and aggregates such as sediment or stone chips at the bottom of the hole are stirred by a drill bit to form a similar concrete mixture 4 similar to the concrete form, the mixture is extruded outside the soil body around the hole pile, backfill materials such as stone chips, waste residues and split rocks are sealed in the soil body, a drilling machine continuously drills into a weathered limestone 5 bearing layer in the pile bottom, and the similar concrete mixture 4 retaining wall at the upper part and the rock embedding part of the weathered limestone 5 form an integral stable lattice system. The method has important significance for improving the construction progress of the rotary-excavated cast-in-place pile and saving the construction cost by mechanically forming holes in mountain split stones and block stone slag waste residue soil with high backfill, non-uniform thickness, poor foundation stability and low bearing capacity to prevent hole collapse. The method comprises the following specific steps:
firstly, positioning and paying off a hole pile, positioning a pile core position, inserting a short steel bar as a mark, positioning three points by taking the short steel bar as a circle center and taking the diameter of the hole pile of 2-3 times as a radius, and selecting a drill bit according to the diameter of the hole pile of a design drawing to carry out normal hole forming construction;
secondly, when hole collapse occurs to the hole pile in the drilling process of the high backfill area, performing a mortar proportioning test on the recharge mortar according to analysis of surrounding soil quality in the drilling process to prepare a mortar material suitable for actual requirements on site;
thirdly, a concrete pump truck is used for enabling cement mortar 2 to stretch into the bottom end through a guide pipe to reach a collapsed hole surface by a distance of 0.3-0.5 m, and then the collapsed hole part is subjected to mortar recharging;
extruding the poured mortar by reversely drilling through a rotary drilling rig, hanging a rotary drilling bit 1 at the hole collapse part to repeatedly sweep the hole, reducing the drilling speed, slowly lifting the drill, repeatedly sweeping the hole for multiple times to ensure that a drilling tool is smooth, and fully permeating the cement mortar 2 into a soil body 3 around the hole pile;
and fifthly, when the cement mortar 2 reaches a certain strength, the cement mortar 2 concretes and forms a soil body 3 around the hole pile, the hole pile is re-drilled by using a rotary drilling rig, the cement mortar 2 and aggregate such as sediment or stone chips at the bottom of the hole are stirred by a rotary drilling bit 1 to form a similar concrete mixture 4 similar to a concrete form, and the mixture is extruded outside the soil body 3 around the hole pile to enclose backfill materials such as stone chips, waste residues and hill wedges.
And step six, after the hole pile is continuously drilled until the pile bottom enters the middle weathering bearing stratum, the upper mixture retaining wall and the middle weathering limestone 5 rock-socketed part form a complete and stable hole pile retaining wall lattice system.
As an optimal scheme, positioning and paying off of the hole pile in the step I are very important, control over the center point of the hole pile by using external reference is guaranteed, and if the condition is not solved, the potential quality hazard that the hole pile deviates can occur.
The selection of the mixing proportion strength of the mortar in the step two is key, different strength mortars are adopted under different conditions, and the coagulation effects are respectively different: adopting M25 cement mortar for consolidation aiming at the block and gravel content of 50-60%; solidifying the blocks and the gravels with the content of 40 to 50 percent by adopting M20 cement mortar; for the block and gravel content of 30-40%, M15 cement mortar is adopted for consolidation, so that hole collapse can be effectively prevented from being formed smoothly;
the purpose that the guide pipe stretches into the bottom in the third step is to prevent the recharged mortar from falling from a high place to cause secondary hole collapse to the pile with larger impact force, thereby influencing the recharging effect.
And the mixture stirred in the step five contains backfill materials such as stone slag and powder in a form similar to coarse aggregate, has high strength, seals the backfill materials in and can be well used as the concrete retaining wall of the hole pile.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (1)
1. The utility model provides a high backfill district digs soon and bores hole adoption mortar consolidation structure that collapses, its characterized in that: the concrete-embedded wall protection lattice system comprises middle weathered limestone (5) and similar concrete mixture (4) on the upper part of the middle weathered limestone, wherein the similar concrete mixture (4) on the upper part and a rock embedding part of the middle weathered limestone (5) form an integral stable hole pile wall protection lattice system; the similar concrete mixture (4) is formed by using a rotary drilling bit (1) to reversely drill and extrude the poured cement mortar (2) to effectively penetrate and solidify the soil body (3) around the hole pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022808834.9U CN214169034U (en) | 2020-11-27 | 2020-11-27 | High backfill region digs soon and bores hole and adopts mortar consolidation structure that collapses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022808834.9U CN214169034U (en) | 2020-11-27 | 2020-11-27 | High backfill region digs soon and bores hole and adopts mortar consolidation structure that collapses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214169034U true CN214169034U (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022808834.9U Expired - Fee Related CN214169034U (en) | 2020-11-27 | 2020-11-27 | High backfill region digs soon and bores hole and adopts mortar consolidation structure that collapses |
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| Country | Link |
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| CN (1) | CN214169034U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112411526A (en) * | 2020-11-27 | 2021-02-26 | 中国建筑第四工程局有限公司 | Mortar consolidation construction method for rotary drilling collapse hole in high backfill region |
-
2020
- 2020-11-27 CN CN202022808834.9U patent/CN214169034U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112411526A (en) * | 2020-11-27 | 2021-02-26 | 中国建筑第四工程局有限公司 | Mortar consolidation construction method for rotary drilling collapse hole in high backfill region |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210910 |