CN101761083B - Underground continuous wall obstacle clearing construction method for traversing ultra-thick obstacle - Google Patents

Underground continuous wall obstacle clearing construction method for traversing ultra-thick obstacle Download PDF

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Publication number
CN101761083B
CN101761083B CN 200810044181 CN200810044181A CN101761083B CN 101761083 B CN101761083 B CN 101761083B CN 200810044181 CN200810044181 CN 200810044181 CN 200810044181 A CN200810044181 A CN 200810044181A CN 101761083 B CN101761083 B CN 101761083B
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China
Prior art keywords
sleeve pipe
soil
backfill
full circle
circle swinging
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CN 200810044181
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Chinese (zh)
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CN101761083A (en
Inventor
吴远忠
李耀良
许如庆
杨永明
吴洁妹
王理想
袁振
邱晓明
Original Assignee
上海市基础工程有限公司
上海市申江两岸开发建设投资(集团)有限公司
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Priority to CN 200810044181 priority Critical patent/CN101761083B/en
Publication of CN101761083A publication Critical patent/CN101761083A/en
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Publication of CN101761083B publication Critical patent/CN101761083B/en

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Abstract

The invention relates to an underground continuous wall obstacle clearing construction method for traversing an ultra-thick obstacle. The ground obstacle clearing is carried out by a full-turning drilling machine. The method comprises the following concrete steps: 1. taking the full-turning drilling machine in position and drilling; 2. pressing a sleeve pipe and drilling in a formed hole in full turns; and 3. drawing the sleeve pipe, filling back and reinforcing. The construction method can effectively clear obstacles, such as riprap, reinforced concrete, and the like, the obstacle clearing process has less disturbance on an ambient soil body, and the perpendicularity of the obstacle clearing hole is 1/400 or so. The invention is suitable for the engineering for clearing obstacles, particularly thicker or quite thick obstacles, such as riprap, reinforced concrete, and the like.

Description

The diaphragm wall of the traversing ultra-thick obstruction job practices of removing obstacles

Technical field

The present invention relates to a kind of construction technology that is specifically designed to the cleaning underground obstacle in the construction of diaphragm wall, particularly relate to a kind of construction technology that is used to clear up obstructions such as riprap layer, steel concrete.

Background technology

Be positioned at Huangpu River west bank, Huangpu River is faced in works limit east, and the plane, base is thin-and-long by north to south.Prolong 0.6 kilometer of bank total length, total land area 30400m 2, land-based area 29747m wherein 2, waters 653m 2Side basement near a river in the base pit engineering of building, diaphragm wall is not only as bracing of foundation pit but also as outer wall of basement and flood-control wall (unification of three walls).

Flood-control wall side ground wall is apart from the nearest 2.5m of flood-control wall, 15m farthest, and existing flood-control wall is built in the seventies in last century, and thickness 400mm, body of wall have crack in various degree.The jackstone revetment is arranged below the flood-control wall basis, and the gradient was slightly larger than 1: 1 in the thickest about 6m of riprap layer, dike, and jackstone is loose distribution, particle diameter 30~50cm, and influencing boundary of works area is the inboard 8m of flood-control wall, and the degree of depth is 8~9m, and jackstone is mattress down.The dark 28m of side ground wall need pass through riprap layer 5~6m near a river.

In the deep gouge process, run into obstructions such as riprap layer and old flood-control wall, in order to clear up the obstruction of deep gouge position, need a cover to utilize the full circle swinging rig to remove obstacles; Riprap layers etc. are removed obstacles and are adopted Japan to produce RT-200AIII type full circle swinging all casing drill, this equipment can effectively be removed obstructions such as jackstone and steel concrete, the process of removing obstacles is little to the surrounding soil disturbance, the hole perpendicularity of removing obstacles is about 1/400, arranges by the position, hole of reasonably removing obstacles and removes to guarantee follow-up construction requirement.

Summary of the invention

The present invention will provide a kind of diaphragm wall of traversing ultra-thick obstruction job practices of removing obstacles, this method can effectively be removed obstructions such as jackstone and steel concrete, the process of removing obstacles is little to the surrounding soil disturbance, the hole perpendicularity of removing obstacles is about 1/400, arranges by the position, hole of reasonably removing obstacles and removes to guarantee follow-up construction requirement.

For achieving the above object, technical scheme of the present invention is: a kind of diaphragm wall of traversing ultra-thick obstruction job practices of removing obstacles, comprise that adopting the full circle swinging rig to carry out the place removes obstacles, and concrete steps are:

D) the in place and perforate of full circle swinging rig

Lay and the stationary positioned steel plate by mark at first accurate setting-out boring position, and make mark, full circle swinging rig in place on fixing steel plate, and the verticality of adjusting its levelness and keyhole sleeve pipe makes it to be not less than 1/300;

E) sleeve pipe is pressed into and the full circle swinging drilling and forming hole

After the full circle swinging rig is in place, carries out burying underground of sleeve pipe and creep into full circle swinging; Splicing sleeve successively, is pressed into sleeve pipe at the rotation of full circle swinging rig, eliminates the inside pipe casing foreign material, and the soil of grabbing out in sleeve pipe is undisturbed soil, and reaches in the physical prospecting report at the bottom of the riprap layer 1.5m under the absolute altitude at least;

F) sleeve pipe is extracted and the backfill reinforcing

Rise after removing obstacles and finish in every hole and pull out sleeve pipe, and in sleeve pipe backfill, use the weight compaction in layers, backfill limit, limit is risen and is pulled out, the backfill of outward transport tonerde gives over to and leads wall after being backfilled to the following 1.5m~2m of road, extract the final section sleeve pipe, and the full circle swinging rig is moved to next position carry out the construction of same operation.

In above-mentioned second step, every joint sleeve pipe is put into the clamp device during the burying underground of sleeve pipe, shrinks the clamp hydraulic cylinder, utilizes full circle swinging rig and guiding deviation correcting device that the vertical precision of sleeve pipe is adjusted in 1/300 the scope of being not less than; Utilize the level monitoring system of full circle swinging rig to check the sleeve pipe verticality at any time in the drilling process, and every Kong Sanci set up transit in two vertical direction of sleeve pipe and carries out verticality and check control; After every joint sleeve pipe connected and checks verticality, the slewing equipment by the full circle swinging rig made sleeve pipe carry out at least 360 ° rotation, reducing the frictional resistance of the sleeve pipe and the soil body, and utilized the cutter tooth cutting soil or the obstruction of cannula tip immediately, was pressed in the soil; And utilize to dash and grab the soil body in the decannulation, as run into the obstructions such as steel concrete of bulk, then utilize weight to carry out grabbing out after the fragmentation, dregs outward transport of grabbing out or employing φ 1500mm full circle swinging drill machine with casing are holed, utilize the cutter tooth cutting reinforced concrete segment of sleeve pipe front end, utilize the broken sleeve pipe inner concrete of weight, reinforcing bar etc. in the boring procedure, with grab bucket fragment is grabbed out again, remove to riprap layer bottom undisturbed soil until boring.

In the above-mentioned third step, backfill is reinforced backfill and is adopted 6% cement-soil, system is mixed at the cement-soil scene, is the generation of the situations such as hole of avoiding collapsing, and the backfill operation is pulled out sleeve pipe and carried out simultaneously with rising, be before formal of sleeve pipe pulls out, the soil of elder generation's backfill certain altitude in sleeve pipe, the backfill of cover tube edge, the compacting of backfill layering weight are pulled out in the limit again, remain that the face of banketing is higher than sleeve pipe bottom surface certain altitude in the sleeve pipe, finally be backfilled to the terrace absolute altitude.

The invention has the beneficial effects as follows: can effectively remove obstructions such as jackstone and steel concrete, the process of removing obstacles is little to the surrounding soil disturbance, the hole perpendicularity of removing obstacles about 1/400.The engineering that is suitable for rid particularly at riprap layer, the steel concrete obstruction is thicker or very thick etc.

Description of drawings

Fig. 1 is the flow chart of removing obstacles of the present invention.

The specific embodiment

Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

As shown in Figure 1, the diaphragm wall of a kind of traversing ultra-thick obstruction of the present invention job practices of removing obstacles may further comprise the steps:

(1) prepare in the place

Rig installation and job requirements levelling of the land also have certain bearing capacity, adopt the method for roadbed paving steel plate.

(2) the in place and perforate of rig

At first accurate setting-out is carried out in design boring position, check the back and make mark by survey crew.Fixing steel plate is laid by mark and is fixing.Adjust the levelness of equipment after rig is in place, and the verticality of observing and control sleeve pipe at any time makes it to be not less than 1/300.

(3) sleeve pipe is pressed into and creeps into

After rig was in place, what begin to carry out sleeve pipe buried and creeps into operation underground.

The precision that every joint sleeve pipe is pressed in the work progress all will directly influence the construction quality of boring.Every joint sleeve pipe is put into the clamp device, shrinks the clamp hydraulic cylinder, utilizes rig and guiding deviation correcting device that the vertical precision of sleeve pipe is adjusted in the scope of requirement.At any time the level monitoring system test sleeve pipe verticality of utilizing equipment to carry in the drilling process, and every Kong Sanci sets up transit in two vertical direction of sleeve pipe and carries out verticality and check control.

After every joint sleeve pipe connects and checks verticality, slewing equipment by the full circle swinging rig makes sleeve pipe be not less than 360 ° rotation, reducing the frictional resistance of the sleeve pipe and the soil body, and utilizes the cutter tooth cutting soil or the obstruction of cannula tip immediately, be pressed in the soil beginning normal operation.

Utilize to dash when grabbing in the decannulation soil body, as running into the obstructions such as steel concrete of bulk, then utilizing weight to carry out grabbing out after the fragmentation, the dregs of grabbing out is transported outward.

(4) pore-forming

Connect, rotate, be pressed into sleeve pipe successively, eliminate the inside pipe casing foreign material, the soil of grabbing out in sleeve pipe is undisturbed soil, and reaches in the physical prospecting report at the bottom of the riprap layer 1.5m under the absolute altitude at least, can confirm that this work of removing obstacles finishes.

(5) sleeve pipe is extracted and backfill

Remove obstacles when having finished to pull out sleeve pipe in every hole, backfill in sleeve pipe, backfill needs the new soil of investigation mission outside the city or town to march into the arena with soil, use the weight compaction in layers, backfill limit, limit is risen and is pulled out, outward transport tonerde backfill gives over to and leads wall after being backfilled to the following 1.5m~2m of road, extracts the final section sleeve pipe, and rig is moved to next position carries out same operation construction.

Main technology measure of the present invention:

(1) position, hole is arranged

This full circle swinging drilling machine construction is considered factors such as pore-forming perpendicularity deviation and lap width, is equipped with φ 1500mm cover pipe construction, faces stake position overlap joint 600mm mutually, the double hole of removing obstacles.The scope of removing obstacles be B, D district by old flood-control wall silhouette Xiang Diqiang, three mixing pile construction zones, both sides, A, C district are by old flood-control wall sidepiece subregion, the degree of depth of removing obstacles is 10~12m, and is clear till do not have a jackstone, need with assurance grooving and cell wall strengthening construction.

(2) revolution cutting

Adopt φ 1500mm full circle swinging drill machine with casing to hole, utilize the cutter tooth cutting reinforced concrete segment of sleeve pipe front end.Utilize the broken sleeve pipe inner concrete of weight, reinforcing bar etc. in the boring procedure, with grab bucket fragment is grabbed out again, remove to riprap layer bottom undisturbed soil until boring.According to the physical prospecting report, this engineering full circle swinging rig is removed obstacles the degree of depth about 10~12m, so ferrule configuration 15m guarantees to remove thoroughly.

(3) backfill is reinforced

After definite pitched work obstruction is removed fully, promptly carry out backfill construction in the pipeline.6% cement-soil is adopted in backfill, and system is mixed at the cement-soil scene, is the generation of the situations such as hole of avoiding collapsing, and the backfill operation is pulled out sleeve pipe and carried out simultaneously with rising.Be sleeve pipe formally rise pull out before, the soil of backfill certain altitude in sleeve pipe earlier, the backfill of cover tube edge is pulled out on the limit again, the compacting of backfill layering weight remains that the face of banketing is higher than sleeve pipe bottom surface certain altitude in the sleeve pipe, finally is backfilled to the terrace absolute altitude.

When obstruction being arranged for diaphragm wall deep gouge construction location, for the engineering that needs rid particularly at riprap layer, during thicker obstruction such as steel concrete, the position, hole is arranged by reasonably removing obstacles, at first utilize the full circle swinging rig that sleeve is pressed into to the surface of obstructions such as piece stone, utilize the deadweight of sleeve then, sleeve pipe turned round by force press down under the obstructions such as passing through block stone layer, for the obstructions such as piece stone that enter in the sleeve pipe, can directly adopt and dash outside the grab bucket discharge sleeve, thereby reach the purpose of removing obstacles, backfill is extracted sleeve pipe then, carry out 6% low parameter with the twin shaft agitation pile then and return the solid soil body of admixture, convenient later trenching construction.

Used full circle swinging rig (RT-200AIII) equipment in the present invention's construction:

(1) equipment characteristic

The RT-200AIII type full circle swinging all casing drill of Japan's vehicle development has following characteristics:

2. the powerful horsepower of 1. super worker's method and ejection escape mechanism pass to powerful horsepower well behaved wedge type clamp mechanism that sleeve pipe is provided with and 3. inside pipe casing excavating gear that 5. 4. mechanism design for underground obstacles such as removal reinforced concrete foundation, steel pipes by the indispensable automatic horizontal guiding mechanism of assurance vertical precision, multiple-drilling machine etc. such as control automatically for the bit weight that effectively utilizes powerful horsepower design for firm.

(2) piece stone cleaning principle is thrown in the riverbed

Riverbed piece stone cleaning directly utilizes slewing drilling machine to carry out, at first utilize slewing drilling machine that sleeve is pressed into to piece clitter surface, utilize the deadweight of sleeve then, sleeve pipe is turned round to press down by force pass through block stone layer and press down, for the piece stone that enters in the sleeve pipe, can directly adopt and dash the grab bucket discharge.

(3) bull grab bucket

The large-scale spiral drill bit that bull grab bucket is installed by fastening devices such as counterweight, connecting rod, guide strip and its lower end etc. constitutes, the bull grab bucket is adopted the 100t crane to transfer and is hung in the sleeve pipe, transfer to always and excavate the bottom, be pressed into while turning round sleeve pipe during construction, bull grab bucket meeting this moment and sleeve pipe turn round together, utilize the augers of front end to destroy the soil body and obstruction.

(4) sleeve pipe revolution

The RT-200AIII type adopts the wedge type clamp mechanism that rotating support ring and the sleeve of slewing drilling machine are fixed, the interlock of wedge type clamp mechanism and sleeve with unclamp by clamping cylinder control, when clamping cylinder upwards promoted, the wedge type piece was followed rising, clamp mechanism is unclamped; When clamping cylinder shrinks downwards, the wedge type piece also descends thereupon, and securely with sleeve pipe and rotary supporting device interlock.The sleeve revolution is by fluid motor-driven, during revolution, the power of hydraulic motor drives pivoting support revolution around sleeve pipe by driver pinion through the ring gear that idle pulley is passed to the pivoting support outer ring, the moment of torsion that the pivoting support rotation produces is delivered on the sleeve by the wedge type clamping device, drives sleeve and turns round.Clamping cylinder is positioned at the standing part of rig, owing to do not turn round with sleeve pipe, thereby hydraulic tube can be in connection state all the time, need not during revolution the clamping device hydraulic tube is separated, and can greatly improve the efficient of creeping into.

(5) sleeve pipe is pressed into

The quality that sleeve pipe inserts the initial stage execution control can be described as and has a significant impact being pressed into rear sleeve, therefore, insertion initial stage, later stage be pressed into job practices and points for attention are different.

1. sleeve pipe inserts the initial stage (deadweight is pressed into)

Can the vertical precision with rear sleeve be had a significant impact at the sleeve pipe initial stage of inserting, so must be pressed into cautiously.During gripping sleeve, be applied in crane sleeve pipe is sling under the unsettled state promptly.The sleeve pipe front end inserts before the auxiliary chuck, catches sleeve pipe with the main folder dish earlier, shrinks push action cylinder and falls sleeve pipe, to prevent the collision accident of drill bit and auxiliary chuck.

Be pressed into sleeve pipe with deadweight, at first motor be arranged on fast state, speed of gyration is set to moderate, and speed dial is 6 during high speed, and speed dial is 10 during low speed.Hydraulic power station " being pressed into the adjustment dish " rotated at the end left, and hydraulic circuit is opened, and keeps pressing the state of button " being pressed into " that pull out, this moment is not because to the push action cylinder fuel feeding, sleeve pipe relies on deadweight to continue to descend, and under this state, sleeve pipe can continue to drop to the range of push action cylinder.The insertion initial stage does not excessively make the sleeve pipe knee-action, should actively cooperate deadweight to press down, the excavation initial stage repeatedly knee-action will make ground loosening.Cause rig below ground to cave in easily, thereby threaten the stable of revetment and bank slope.Have only when deadweight and carry out press-in speed when slack-off, can progressively increase the power of being pressed into.When adopting deadweight to be pressed into, the power design formulas of being pressed into is:

Be pressed into part deadweight (W1)+sleeve pipe deadweight (W2) of power (deadweight) F=rig

2. excavate the later stage (using hydraulic pressure manually to be pressed into)

Enter and excavate mid-term, when adopting the deadweight press-in speed slack-off, hydraulic power station " is pressed into power adjustment dish " to right rotation, hydraulic pressure can progressively rise, press and pull out button when placing " being pressed into " state this moment, hydraulic jack is to the push action cylinder fuel feeding, and the pattern that is pressed into this moment transfers hydraulic pressure to and is pressed into, and be pressed into the power design formulas and be this moment:

Be pressed into part deadweight (1)+sleeve pipe deadweight (W2)+hydraulic coupling (P)>peripheral frictional resistance (R)+preceding end resistance (D) of power F=rig

(6) bit weight control

When single bit weight is the 4t left and right sides, drill bit is in overload, and will produce strong impact and vibration this moment, therefore must control bit weight in work progress, at this moment need sleeve pipe is mentioned slightly, realize that the mechanism of this function is called " B-CON mechanism ".Scale instrument by B-CON mechanism can be set bit weight, thereby sleeve pipe is mentioned slightly for the drawing oil oil supply cylinder.Measure this moment the weight W m (RT200A is 25t) of sleeve pipe deadweight Wc, body and circumferential surface resistance F rationally, the load that then is added on drill bit is zero.Next the pressure of drawing oil cylinder is released, bit weight just increases.When reaching assumed load, just can keep assumed load and begin automatic cutting.

(7) other not clear obstruction fragmentations

The bull grab bucket is adopted in the fragmentation of other not clear obstructions, the large-scale spiral drill bit that bull grab bucket is installed by fastening devices such as counterweight, connecting rod, guide strip and its lower end etc. constitutes, the bull grab bucket is adopted the 100t crane to transfer and is hung in the sleeve pipe, transfer to always and excavate the bottom, be pressed into while turning round sleeve pipe during construction, bull grab bucket meeting this moment and sleeve pipe turn round together, utilize the augers of front end to destroy the soil body and obstruction.The bull grab bucket is inserted in the sleeve pipe, fixes in the lower end of sleeve pipe, utilizes the power of RT, with timber and other not clear obstructions in the broken soil body of the large-scale spiral drill bit of front end.

(8) dregs is discharged

Dregs discharge to adopt dashes grab bucket, and the sleeve pipe of the φ 1500mm that is equipped with according to this engineering selects for use the industrial nominal diameter of clear water to discharge the dregs that rotary drilling produces for φ 1500mm dashes grab bucket, and its weight is 6.1t, capacity 0.4m 3, height 4.039m, external diameter φ 1340mm.Dashing grab bucket all has compliance preferably for dregs and the broken obstruction that revolution produces, and can discharge large-scale boulder.

(9) sleeve is pulled out

Ferrule sleeve is removed in rotary drilling and is finished after dregs and the obstruction full scale clearance to predetermined absolute altitude and in sleeve.Pull out and adopt the slewing equipment reversed turning to carry out, pull out with backfill and should carry out synchronously, be full of hole and guarantee the closely knit of backfill to guarantee backfilling material.Tube drawing should suspend near the riverbed end face time to be pulled out, and treats to pull out the residue conduit on the row again after slip casting is finished in the backfilling material.

Because sleeve one save and presses down spreading constantly in rotary drilling, therefore pulls out sleeve and also carries out according to the method for pulling out by joint, pull out a joint back and remove after top one saves sleeve, continue to extract the bottom and overlap.

Claims (3)

1. the diaphragm wall of the traversing ultra-thick obstruction job practices of removing obstacles, comprise adopt complete
Slewing drilling machine carries out the place removes obstacles, and it is characterized in that concrete steps are:
A) the in place and perforate of full circle swinging rig
Lay and the stationary positioned steel plate by mark at first accurate setting-out boring position, and make mark, full circle swinging rig in place on fixing steel plate, and the verticality of adjusting its levelness and keyhole sleeve pipe makes it to be not less than 1/300;
B) sleeve pipe is pressed into and the full circle swinging drilling and forming hole
After the full circle swinging rig is in place, carries out burying underground of sleeve pipe and creep into full circle swinging; Splicing sleeve successively, is pressed into sleeve pipe at the rotation of full circle swinging rig, eliminates the inside pipe casing foreign material, and the soil of grabbing out in sleeve pipe is undisturbed soil, and reaches in the physical prospecting report at the bottom of the riprap layer 1.5m under the absolute altitude at least;
C) sleeve pipe is extracted and the backfill reinforcing
Rise after removing obstacles and finish in every hole and pull out sleeve pipe, and in sleeve pipe backfill, use the weight compaction in layers, backfill limit, limit is risen and is pulled out, the backfill of outward transport tonerde gives over to and leads wall after being backfilled to the following 1.5m~2m of road, extract the final section sleeve pipe, and the full circle swinging rig is moved to next position carry out the construction of same operation.
2. the diaphragm wall of the traversing ultra-thick obstruction according to claim 1 job practices of removing obstacles, it is characterized in that: in above-mentioned second step, every joint sleeve pipe was put into the clamp device when sleeve pipe was buried underground, shrink the clamp hydraulic cylinder, utilize full circle swinging rig and guiding deviation correcting device that the vertical precision of sleeve pipe is adjusted in 1/300 the scope of being not less than; Utilize the level monitoring system of full circle swinging rig to check the sleeve pipe verticality at any time in the drilling process, and every Kong Sanci set up transit in two vertical direction of sleeve pipe and carries out verticality and check control; After every joint sleeve pipe connected and checks verticality, the slewing equipment by the full circle swinging rig made sleeve pipe carry out at least 360 ° rotation, reducing the frictional resistance of the sleeve pipe and the soil body, and utilized the cutter tooth cutting soil or the obstruction of cannula tip immediately, was pressed in the soil; And utilize to dash and grab the soil body in the decannulation, as run into the obstructions such as steel concrete of bulk, then utilize weight to carry out grabbing out after the fragmentation, dregs outward transport of grabbing out or employing φ 1500mm full circle swinging drill machine with casing are holed, utilize the cutter tooth cutting reinforced concrete segment of sleeve pipe front end, utilize the broken sleeve pipe inner concrete of weight, reinforcing bar etc. in the boring procedure, with grab bucket fragment is grabbed out again, remove to riprap layer bottom undisturbed soil until boring.
3. the diaphragm wall of the traversing ultra-thick obstruction according to claim 1 job practices of removing obstacles, it is characterized in that: in the above-mentioned third step, backfill is reinforced and is adopted 6% cement-soil, system is mixed at the cement-soil scene, generation for the situations such as hole of avoiding collapsing, the backfill operation is pulled out sleeve pipe and carries out simultaneously with rising, be before formal of sleeve pipe pulls out, the soil of elder generation's backfill certain altitude in sleeve pipe, the backfill of cover tube edge is pulled out on the limit again, the compacting of backfill layering weight remains that the face of banketing is higher than the sleeve pipe bottom surface in the sleeve pipe, finally is backfilled to the terrace absolute altitude.
CN 200810044181 2008-12-24 2008-12-24 Underground continuous wall obstacle clearing construction method for traversing ultra-thick obstacle CN101761083B (en)

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Application Number Priority Date Filing Date Title
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CN103556641A (en) * 2013-10-09 2014-02-05 中铁十三局集团有限公司 Grooving assisting method for in-pit underground diaphragm wall of existing basement
CN103953358B (en) * 2014-04-21 2016-05-18 江苏鼎达建筑新技术有限公司 Underground obstacle is removed construction method
CN104060615B (en) * 2014-06-05 2016-06-15 江苏省华建建设股份有限公司 Newly-built foundation pit supporting construction is utilized to remove the construction method of underground obstacle
CN104500075B (en) * 2014-11-19 2017-07-04 江苏鼎达建筑新技术有限公司 Rope saw cuts the construction method of underground obstacle
CN104452776B (en) * 2014-11-19 2016-02-17 中铁十八局集团第一工程有限公司 Meet with the one construction Treatment Methods of diaphragm wall during boulder
CN105507321B (en) * 2015-12-16 2017-06-30 上海市城市建设设计研究总院(集团)有限公司 For the efficient process for sinking of existing prefabricated pile
CN106761792B (en) * 2017-01-20 2019-01-25 武汉市市政建设集团有限公司 A kind of full-sleeve full-rotation drill sleeve and shield cutter front obstacle sweep-out method
CN108487233B (en) * 2018-03-26 2020-09-25 江苏华东建设基础工程有限公司 Construction method of underground continuous wall with I-shaped steel joint
CN108894230B (en) * 2018-07-19 2020-08-18 中铁大桥局集团有限公司 Method for treating boulder during sinking of pile casing
CN109989409A (en) * 2019-03-22 2019-07-09 上海长凯岩土工程有限公司 Building enclosure soil layer underground cavity is removed obstacles method
CN110080210A (en) * 2019-04-20 2019-08-02 中国二十冶集团有限公司 Cast-in-place pile construction method in discarded ground
CN110424372A (en) * 2019-08-09 2019-11-08 江苏省华建建设股份有限公司 Along road interval method in a row remove obstacles after construct diaphram wall construction method

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