CN102535474A - Construction method for deep-foundation pit excavation - Google Patents
Construction method for deep-foundation pit excavation Download PDFInfo
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- CN102535474A CN102535474A CN2010105851897A CN201010585189A CN102535474A CN 102535474 A CN102535474 A CN 102535474A CN 2010105851897 A CN2010105851897 A CN 2010105851897A CN 201010585189 A CN201010585189 A CN 201010585189A CN 102535474 A CN102535474 A CN 102535474A
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Abstract
The invention relates to a construction method for deep-foundation pit excavation. After foundation pit fender structure construction is finished, an excavation machine is used for excavating and an earthwork vehicle is used for transporting out the earthwork. The construction method is characterized by comprising the following steps of: a. earthwork excavation for the first time: uniformly excavating from every corner of the foundation pit to the center by dividing three regions in a retreating manner; b. fender supporting structure construction and maintenance: pouring the fender supporting structure, and carrying out next-step construction when the supporting concrete strength achieves 80% of the design strength; and c. earthwork excavation for the second time: carrying out earthwork excavation below the fender supporting structure, selecting excavation equipment, excavating, and transporting out the earthwork in the pit in a two-stage overturning and transferring manner to finish excavation. The construction method for deep-foundation pit excavation has the advantages of being reasonable in construction step design, simple to operate and safe and reliable in excavating engineering, lowering engineering construction cost, saving construction period, and being obvious in economic benefit.
Description
Technical field
The present invention relates to the job practices of the underground deep foundation ditch of a kind of construction work, specifically, is the job practices that a kind of deep foundation ditch is cut the earth.
Background technology
In recent years, the building density in the city advances along with modernization and constantly increases, because of land for building costliness and commercial interest are considered; Or for meeting requirement such as municipal administration's civil defence, the emphasis that utilizes the underground space also to become the investor to pay close attention to as far as possible, the investor not only pays close attention to height on the ground; More pay close attention to the utilization of the underground space, underground space cutting depth is more and more darker, and the excavation environment is complicated day by day; The excavation safety problem is corresponding outstanding, and security incident is of common occurrence in the Deep Excavation, and deep pit digging exists much not science, irrational place; Be provided with several support like foundation ditch, foundation ditch manufacturing process is numerous and diverse, manufacturing cost is high.
Therefore the job practices that known deep foundation ditch is cut the earth exists above-mentioned all inconvenience and problem.
Summary of the invention
The object of the invention is to propose the job practices that a kind of safe and reliable deep foundation ditch is cut the earth.
For realizing above-mentioned purpose, technical solution of the present invention is:
The job practices that a kind of deep foundation ditch is cut the earth after the foundation pit enclosure structure construction is accomplished, uses a digging machine shoveling and a cubic metre of earth car that the earthwork is transported outward, and it is characterized in that may further comprise the steps:
A, soil excavation for the first time divide three zones to be begun to dig to well-balanced the moving back in middle part simultaneously by each corner of foundation ditch;
B, go along with sb. to guard him braced structures construction and maintenance, build and go along with sb. to guard him braced structures, and support concrete strength reach design strength 80% after carry out next step construction;
C, soil excavation for the second time comprise:
(1) goes along with sb. to guard him the following soil excavation of braced structures, divide three zone excavations, all begin from the fender post edge earlier when excavate in each zone;
(2) shoveling equipment choosing; The PC100 digging machine is gone along with sb. to guard him the braced structures bottom and is fetched earth along with deeply sinking down into gradually of excavation; The outward transport of cubic metre of earth car is concentrated, loaded onto to the earthwork of being dug out by being stopped at the PC200 digging machine that stays native face upper edge, and the little digging machine of PC60 is positioned at the foundation ditch bottom and carries out operation;
(3) cut the earth and a cubic metre of earth outward transport, excavation was accomplished in cubic metre of earth transportation by lighter in the mode that adopts secondary to turn over biography was cheated.
The job practices that deep foundation ditch of the present invention is cut the earth can also adopt following technical measures further to realize.
Aforesaid method among the wherein said step c, is provided with three excavation zones, and the continuous uninterrupted excavation is carried out in each excavation zone, after excavation is accomplished, carries out bed course rapidly and supports construction.
Aforesaid method, wherein said bed course is smash with digging with watering, and the foundation ditch exposed area is controlled at 120m
2In, and open-assembly time be controlled in 12 hours.
Aforesaid method among the wherein said step c, is carried out before the shoveling in deep-well precipitation and the shoveling process and is carried out bright gutter, open fire in the foundation ditch of in time draining.
Aforesaid method, among the wherein said step c, segmentation, alternation excavation are made in the earthwork that foundation platform, collecting well downturned portion divide during excavation.
Aforesaid method, among the wherein said step c, use the digging machine excavation after, during soil layer about residue 300mm by the hand excavation.
Aforesaid method, among the wherein said step c, unit in time provides each item monitored data by monitoring, instructs the excavation of foundation pit construction.
Aforesaid method, among the wherein said step c, it is in easy flights in 1:1.5 to put the slope during excavation, and it is in easy flights in 1:2 that the side slope that longer-term uses is put the slope.
After adopting technique scheme, the job practices that deep foundation ditch of the present invention is cut the earth has the following advantages:
1, construction sequence is reasonable in design, simple to operate;
2, open excavation is safe and reliable;
3, reduce the engineering construction cost, practice thrift the duration, economic benefit is obvious.
Description of drawings
Fig. 1 is the foundation pit enclosure structure floor map of the embodiment of the invention;
Fig. 2 is the foundation pit enclosure structure generalized section of the embodiment of the invention;
Fig. 3 is the soil excavation generalized section first time of the embodiment of the invention;
Fig. 4 is the soil excavation generalized section second time of the embodiment of the invention;
Fig. 5 stays native floor map for the soil excavation first time of the embodiment of the invention;
Fig. 6 is the soil excavation subregion floor map first time of the embodiment of the invention;
Fig. 7 is the soil excavation floor map second time of the embodiment of the invention.
Among the figure: 1 steel concrete supports, 2 interim support posts, 3 compaction groutings, 4 drilled piles, 5 soil excavations for the first time, 6 the second time soil excavation; 7 collar tie beams are reinforced at the bottom of 8 holes, at the bottom of the 9 base plate bed courses, and 10 natural terrace absolute altitudes, 11 first roads support; 12 castinplace piles, 13 dull agitation piles, 14 stand column pile, 15 treat excavation zone, 16 middle transition platforms; 17 foundation ditch peripheries are gone along with sb. to guard him, and 18 put sloping backfill zone, 19 platform beam slabs, 20 digging machines, 21 cubic metres of earth of cars; 22 soil outlets, the outer zone, slope of putting, 23 holes, 24 for the first time soil excavation stay the soil zone, 25 inlets, 26 last operating areas of soil excavations for the first time; 27 soil excavation 1# digging machine operating areas for the first time, 28 soil excavation 2# digging machine operating areas for the first time, 29 soil excavation 3# digging machine operating areas for the first time, 30 with digging to put the slope domatic with establishing ladder, 31 soil excavation first operating areas for the second time; 32 soil excavation second operating areas for the second time, 33 soil excavation the 3rd operations zones for the second time, 34 last operating areas of soil excavations for the second time, 35 accesss, 36 platforms that are unearthed.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing thereof the present invention is illustrated further.
Embodiment 1
See also Fig. 1 and Fig. 2, Fig. 1 is the foundation pit enclosure structure layout sketch map of the embodiment of the invention at present, and Fig. 2 is the foundation pit enclosure structure generalized section of the embodiment of the invention.As shown in the figure; Said foundation pit enclosure structure is according to known technology castinplace pile 12, and dull agitation pile 13, collar tie beam 7 are constructed with compaction grouting 3 after the completion; The excavation of foundation pit form totally is " the island formula is put the slope " excavation; At the uniform velocity excavate to the centre by fender body, use digging machine 20 shovelings the earthwork to be transported outward, it is characterized in that may further comprise the steps with cubic metre of earth car 21:
A, soil excavation for the first time divide three zones 27,28,29 to be begun to dig to well-balanced the moving back in middle part simultaneously by each corner of foundation ditch;
The design foundation ditch protection class of b, this engineering is a secondary, adopts routine techniques to go along with sb. to guard him braced structures construction and maintenance, build and go along with sb. to guard him braced structures, and support concrete strength reach design strength 80% after carry out next step construction;
C, soil excavation for the second time comprise:
(1) goes along with sb. to guard him the following soil excavation of braced structures, divide three zones 31,32; 33 excavations all begin from fender post 12 edges earlier when excavate in each zone, and the continuous uninterrupted excavation is carried out in each excavation zone; After excavation is accomplished; Carry out bed course rapidly and support construction, said bed course 9 is smash with digging with watering, and the foundation ditch exposed area is controlled at 120m
2In, and open-assembly time be controlled in 12 hours; Carry out before the shoveling in deep-well precipitation and the shoveling process and carry out bright gutter, open fire in the foundation ditch of in time draining; Segmentation, alternation excavation are made in the earthwork that foundation platform, collecting well downturned portion divide during excavation.
(2) shoveling equipment choosing; The PC100 digging machine is gone along with sb. to guard him the braced structures bottom and is fetched earth along with deeply sinking down into gradually of excavation; Shoveling shutdown face is arranged on the loam layer in place, and can guarantee that digging machine is supporting bottom ability walking freely, excavator lower berth subgrade case; A cubic metre of earth car outward transport is concentrated, loaded onto to the earthwork of being dug out by being stopped at the PC200 digging machine that stays native face upper edge, and the earthwork that the PC100 digging machine is dug out all should be in the radius of gyration of last layer digging machine work.Because of the degree of depth of engineering excavation is bigger, still to put slope 18 during shoveling, and establish transition platform in the centre by the ladder form, berm width is greater than 6m, and strict control grade of side slope is less than 1:1.5.Local dell position (elevator shaft, collecting well etc.) in case of the PC100 digging machine can not dig to the zone, then be equipped with some the lighter little digging machines of PC60 of deadweight and be positioned at and carry out operation bottom the foundation ditch by field requirement; Earlier traffic route is arranged effectively before the excavation that the supporting surface that need pass through at digging machine and cubic metre of earth car carries out backfilling of earthwork and compacting.The backfill height is higher than supporting surface 300mm, and the support top after backfill lays away guidance tape, guarantees to support to cause the support part fracture because of the point load face that the vehicle turnover produces; Digging machine not directly walks in supporting surface, behind the use digging machine excavation, in the soil excavation process, forbids to backbreak; All outward transports in time behind all soil excavations, and when in the end remaining the soil layer about 300mm by the hand excavation, hand excavation's soil in time is transported near the digging machine; Take out of by digging machine; Digging machine must not be got back in type soil layer face once more, and bearing stratum is produced disturbance, produces spongy soil.
(3) cut the earth and a cubic metre of earth outward transport, cubic metre of earth transportation by lighter in the mode that adopts secondary to turn over biography is cheated, it is in easy flights in 1:1.5 to put the slope during excavation, and it is in easy flights in 1:2 that the side slope that longer-term uses is put the slope; Unit in time provides each item monitored data by monitoring; Instruct the excavation of foundation pit construction, form foundation ditch middle part " central island " among a small circle the mid-term of soil excavation gradually in the second time, and its later stage is when cutting the earth ending; Simultaneously moving back the mode of digging by the middle part to the both sides soil outlet by 2～4 groups of digging machines employings of work plane outfit excavates; Dig to the earthwork at the last platform place of being unearthed separately, then cooperate long-armed digging machine to carry out the ending of surplus earth, accomplish excavation by little digging machine.
Fig. 7 is the soil excavation floor map second time of the embodiment of the invention, each gate, free both sides turnover of vehicle when digging the central island earthwork of last middle part.
The job practices effective depth that deep foundation ditch of the present invention is cut the earth reaches 9.4 meters (local 11.35 meters), but has only the foundation ditch shoveling safety of one foundation ditch support, and whole ground and Foundation Design are accomplished smoothly.
The job practices that deep foundation ditch of the present invention is cut the earth is the utilization of joint motor square in Shanghai, and effect is remarkable, has obtained exploiting entity, supervisor and owner's abundant affirmation.
Above embodiment only supplies to explain the present invention's usefulness, but not limitation of the present invention, the technician in relevant technologies field under the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or variation.Therefore, all technical schemes that are equal to also should belong to category of the present invention, should be limited each claim.
Claims (8)
1. the job practices that deep foundation ditch is cut the earth after the foundation pit enclosure structure construction is accomplished, uses a digging machine shoveling and a cubic metre of earth car that the earthwork is transported outward, and it is characterized in that may further comprise the steps:
A, soil excavation for the first time divide three zones to be begun to dig to well-balanced the moving back in middle part simultaneously by each corner of foundation ditch;
B, go along with sb. to guard him braced structures construction and maintenance, build and go along with sb. to guard him braced structures, and support concrete strength reach design strength 80% after carry out next step construction;
C, soil excavation for the second time comprise:
(1) goes along with sb. to guard him the following soil excavation of braced structures, divide three zone excavations, all begin from the fender post edge earlier when excavate in each zone;
(2) shoveling equipment choosing; The PC100 digging machine is gone along with sb. to guard him the braced structures bottom and is fetched earth along with deeply sinking down into gradually of excavation; The outward transport of cubic metre of earth car is concentrated, loaded onto to the earthwork of being dug out by being stopped at the PC200 digging machine that stays native face upper edge, and the little digging machine of PC60 is positioned at the foundation ditch bottom and carries out operation;
(3) cut the earth and a cubic metre of earth outward transport, excavation was accomplished in cubic metre of earth transportation by lighter in the mode that adopts secondary to turn over biography was cheated.
2. the job practices that deep foundation ditch as claimed in claim 1 is cut the earth is characterized in that, among the said step c, three excavation zones is set, and the continuous uninterrupted excavation is carried out in each excavation zone, after excavation is accomplished, carries out bed course rapidly and supports construction.
3. the job practices that deep foundation ditch as claimed in claim 2 is cut the earth is characterized in that said bed course is smash with digging with watering, and the foundation ditch exposed area is controlled at 120m
2In, and open-assembly time be controlled in 12 hours.
4. the job practices that deep foundation ditch as claimed in claim 1 is cut the earth is characterized in that, among the said step c, carries out before the shoveling in deep-well precipitation and the shoveling process and carries out bright gutter, open fire in the foundation ditch of in time draining.
5. the job practices that deep foundation ditch as claimed in claim 1 is cut the earth is characterized in that, among the said step c, segmentation, alternation excavation are made in the earthwork that foundation platform, collecting well downturned portion divide during excavation.
6. the job practices that deep foundation ditch as claimed in claim 1 is cut the earth is characterized in that, among the said step c, use the digging machine excavation after, during soil layer about residue 300mm by the hand excavation.
7. the job practices that deep foundation ditch as claimed in claim 1 is cut the earth is characterized in that, among the said step c, unit in time provides each item monitored data by monitoring, instructs the excavation of foundation pit construction.
8. the job practices that deep foundation ditch as claimed in claim 1 is cut the earth is characterized in that, among the said step c, it is in easy flights in 1:1.5 to put the slope during excavation, and it is in easy flights in 1:2 that the side slope that longer-term uses is put the slope.
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| CN201010585189.7A CN102535474B (en) | 2010-12-13 | 2010-12-13 | A kind of construction method of deep-foundation pit excavation |
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| CN201010585189.7A CN102535474B (en) | 2010-12-13 | 2010-12-13 | A kind of construction method of deep-foundation pit excavation |
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| CN102535474B CN102535474B (en) | 2015-09-30 |
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Cited By (16)
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| CN103410152A (en) * | 2013-09-05 | 2013-11-27 | 中交公路养护工程技术有限公司 | Construction method for long, narrow and deep foundation pit soil excavation |
| CN104099935A (en) * | 2014-04-01 | 2014-10-15 | 浙江省建筑设计研究院 | Column reinforcement method after foundation pit deepening |
| CN104164878A (en) * | 2013-05-20 | 2014-11-26 | 中交公路养护工程技术有限公司 | Earth excavation technology for ultra-large type deep foundation pit |
| CN104213567A (en) * | 2013-05-30 | 2014-12-17 | 中国二十冶集团有限公司 | Construction method for controlling sliding of slope section of underground pipeline |
| CN104631465A (en) * | 2014-12-15 | 2015-05-20 | 上海市基础工程集团有限公司 | Deep foundation pit excavation construction method adopted under pebble bed red sandstone geological condition |
| CN105544576A (en) * | 2016-01-20 | 2016-05-04 | 山东科技大学 | Foundation ditch dewatering and drainage excavation structure and application method |
| CN106320261A (en) * | 2016-08-22 | 2017-01-11 | 中交天航港湾建设工程有限公司 | Ultra-long harbor basin slope excavation construction method |
| CN108086327A (en) * | 2018-01-19 | 2018-05-29 | 浙江省建建设集团有限公司 | A kind of special-shaped construction method of deep foundation ditch of adjacent subway tunnel |
| CN108239983A (en) * | 2018-01-16 | 2018-07-03 | 中铁十九局集团第七工程有限公司 | A kind of construction method of deep basal pit |
| CN108343067A (en) * | 2018-02-11 | 2018-07-31 | 宁波市明耀智能科技有限公司 | A method of carrying out excavation of foundation pit on weak soil of the water content more than 60% |
| CN108589770A (en) * | 2018-05-09 | 2018-09-28 | 中铁十二局集团有限公司 | Construction method is moved in the retaining wall of subway station |
| CN110080234A (en) * | 2019-04-30 | 2019-08-02 | 宁波铭奥科技发展有限公司 | A method of it is excavated in the secondary central island of deep foundation pit of soft soil foundation |
| CN111395350A (en) * | 2020-04-15 | 2020-07-10 | 中国建筑第七工程局有限公司 | Soft soil deep foundation pit soil excavation construction method |
| CN114541407A (en) * | 2022-01-22 | 2022-05-27 | 北京市政路桥股份有限公司 | L-shaped excavation construction method for foundation pit |
| CN114908761A (en) * | 2022-06-08 | 2022-08-16 | 中国二十冶集团有限公司 | Excavation construction method of foundation pit |
| CN115262567A (en) * | 2022-08-02 | 2022-11-01 | 中建市政工程有限公司 | Ultra-narrow full-hard rock deep foundation pit excavation method |
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| CN104164878B (en) * | 2013-05-20 | 2016-09-21 | 中交公路养护工程技术有限公司 | A kind of construction method of ultra-large type deep foundation pit earthwork digging |
| CN104164878A (en) * | 2013-05-20 | 2014-11-26 | 中交公路养护工程技术有限公司 | Earth excavation technology for ultra-large type deep foundation pit |
| CN104213567A (en) * | 2013-05-30 | 2014-12-17 | 中国二十冶集团有限公司 | Construction method for controlling sliding of slope section of underground pipeline |
| CN103410152B (en) * | 2013-09-05 | 2015-08-19 | 中交公路养护工程技术有限公司 | A kind of construction method for long and narrow deep foundation pit earthwork digging |
| CN103410152A (en) * | 2013-09-05 | 2013-11-27 | 中交公路养护工程技术有限公司 | Construction method for long, narrow and deep foundation pit soil excavation |
| CN104099935A (en) * | 2014-04-01 | 2014-10-15 | 浙江省建筑设计研究院 | Column reinforcement method after foundation pit deepening |
| CN104099935B (en) * | 2014-04-01 | 2015-10-21 | 浙江省建筑设计研究院 | Column reinforcement means after a kind of foundation pit deepened |
| CN104631465A (en) * | 2014-12-15 | 2015-05-20 | 上海市基础工程集团有限公司 | Deep foundation pit excavation construction method adopted under pebble bed red sandstone geological condition |
| CN105544576B (en) * | 2016-01-20 | 2018-06-08 | 山东科技大学 | A kind of foundation pit Yield rainfall relation excavation method |
| CN105544576A (en) * | 2016-01-20 | 2016-05-04 | 山东科技大学 | Foundation ditch dewatering and drainage excavation structure and application method |
| CN106320261A (en) * | 2016-08-22 | 2017-01-11 | 中交天航港湾建设工程有限公司 | Ultra-long harbor basin slope excavation construction method |
| CN106320261B (en) * | 2016-08-22 | 2018-06-08 | 中交天航港湾建设工程有限公司 | A kind of construction method of overlength basin slope excavating |
| CN108239983A (en) * | 2018-01-16 | 2018-07-03 | 中铁十九局集团第七工程有限公司 | A kind of construction method of deep basal pit |
| CN108239983B (en) * | 2018-01-16 | 2020-03-24 | 中铁十九局集团第七工程有限公司 | Construction method of deep foundation pit |
| CN108086327A (en) * | 2018-01-19 | 2018-05-29 | 浙江省建建设集团有限公司 | A kind of special-shaped construction method of deep foundation ditch of adjacent subway tunnel |
| CN108343067B (en) * | 2018-02-11 | 2020-02-07 | 宁波市明耀智能科技有限公司 | Method for excavating foundation pit on soft soil with water content of more than 60 percent |
| CN108343067A (en) * | 2018-02-11 | 2018-07-31 | 宁波市明耀智能科技有限公司 | A method of carrying out excavation of foundation pit on weak soil of the water content more than 60% |
| CN108589770A (en) * | 2018-05-09 | 2018-09-28 | 中铁十二局集团有限公司 | Construction method is moved in the retaining wall of subway station |
| CN110080234A (en) * | 2019-04-30 | 2019-08-02 | 宁波铭奥科技发展有限公司 | A method of it is excavated in the secondary central island of deep foundation pit of soft soil foundation |
| CN110080234B (en) * | 2019-04-30 | 2021-04-30 | 宁波铭奥科技发展有限公司 | Method for excavating secondary central island in deep foundation pit of soft soil foundation |
| CN111395350A (en) * | 2020-04-15 | 2020-07-10 | 中国建筑第七工程局有限公司 | Soft soil deep foundation pit soil excavation construction method |
| CN114541407A (en) * | 2022-01-22 | 2022-05-27 | 北京市政路桥股份有限公司 | L-shaped excavation construction method for foundation pit |
| CN114541407B (en) * | 2022-01-22 | 2023-10-31 | 北京市政路桥股份有限公司 | L-shaped excavation construction method for foundation pit |
| CN114908761A (en) * | 2022-06-08 | 2022-08-16 | 中国二十冶集团有限公司 | Excavation construction method of foundation pit |
| CN114908761B (en) * | 2022-06-08 | 2023-07-21 | 中国二十冶集团有限公司 | Excavation construction method for foundation pit |
| CN115262567A (en) * | 2022-08-02 | 2022-11-01 | 中建市政工程有限公司 | Ultra-narrow full-hard rock deep foundation pit excavation method |
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