CN101824919B - Deep hole underwater installation and locating method of steel pipe column in weak watery stratum - Google Patents

Deep hole underwater installation and locating method of steel pipe column in weak watery stratum Download PDF

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Publication number
CN101824919B
CN101824919B CN 201010139418 CN201010139418A CN101824919B CN 101824919 B CN101824919 B CN 101824919B CN 201010139418 CN201010139418 CN 201010139418 CN 201010139418 A CN201010139418 A CN 201010139418A CN 101824919 B CN101824919 B CN 101824919B
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steel pipe
pipe column
concrete
locating
construction
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CN 201010139418
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Chinese (zh)
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CN101824919A (en
Inventor
李建高
汪立辉
李少利
胥明
石清虎
田双龙
袁甲
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中铁隧道集团有限公司
中铁隧道集团三处有限公司
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Publication of CN101824919A publication Critical patent/CN101824919A/en
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Abstract

The invention discloses a deep hole underwater installation and locating method of a steel pipe column in a weak watery stratum, concretely comprising the following construction steps of firstly, pouring concrete with a design height in the steel pipe column, and installing and locating a screw jack at the bottom of the steel pipe column; secondly, measuring and paying off on the construction ground surface, and drilling by a drill; thirdly, installing a drilling pile reinforcement cage in a hole; fourthly, installing a location platform on the construction ground surface; fifthly, hoisting the steel pipe column and putting the steel pipe column in a drilling pile hole; sixthly, locating the top part of the steel pipe column by the ground surface location platform; seventhly, locating and measuring the verticality of the steel pipe column by a laser plummet; eighthly, locating the bottom of the steel pipe column by the screw jack; ninthly, pouring drilling pile concrete underwater to the design burying height of the steel pipe column; and tenthly, pouring steel pipe column internal concrete to the top of a steel tube after the drilling pile internal concrete achieves the design strength of 70 percent. The method has the advantages of simple operation, high construction efficiency, low construction cost, high and controllable installation accuracy and little safety risk.

Description

Steel pipe column is at rich water soft stratum medium-length hole installation and locating method under water
[technical field]
The present invention relates in a kind of cap excavation method constructing structure the mounting method of vertical bearing system, relate in particular to lid and dig in the reverse construction structure steel pipe column at rich water soft stratum medium-length hole installation and locating method under water.
[background technology]
Along with rapid economic development of China and quickening of urbanization process, urban construction enters great development period, construction enthusiasm in various places is day by day surging, but bustling day by day city gives the condition that construction creates and the time of leaving construction for fewer and feweri, and difficulty of construction is increasing.Above-mentioned phenomenon is mainly reflected in: project scale is big, the foundation ditch group is many, the foundation ditch area is big, the degree of depth is dark.It is space enclosing structure and the middle pile of doing foundation ditch earlier at ground surface downwards that known cap is dug contrary sequence method, and foundation pit enclosure structure adopts diaphragm wall or curtain pile more, and intermediate supports utilizes the middle standing pillar of agent structure itself to reduce construction costs more.Can excavate the top layer soil body subsequently to agent structure top board ground level, utilize the soil body that does not excavate to build top board as clay model; Remaining bottom engineering is constructed under the top cover of sealing.Because the cap excavation method construction is peculiar to the high advantage of little, dark, the big security of foundation ditch construction coefficient of city inhabitant construction infection, has obtained more scholar's favor.One one post has very important effect in the cap excavation method support system, the construction precision of stake, post not only affects the cap excavation method safety of construction period, affects the construction of later stage internal construction simultaneously.
In rich water soft stratum, the domestic ordinary steel cylinder-wall protecting method that generally adopts is carried out steel pipe column installing and locating in the deep hole of emptying mud at present, specifically may further comprise the steps: concrete in installation positioner, pour concrete anchoring locator, installation steel pipe column, pour concrete anchoring steel pipe column bottom, the cast steel pipe column at the bottom of steel cylinder-wall protecting, pump drainage mud, the artificial hole; But this worker's method exists, and operation is numerous and diverse, long in time limit, construction cost is high, behind the pump drainage mud in security risk height, the drilled pile repeatedly the constuction joint that forms of pour concrete to stake anti-dial the bigger adverse effect of stressed existence, precision is difficult for shortcomings such as measurement, be embodied in:
(1), adopt the steel cylinder-wall protecting because the steel pipe column buried depth is big, the steel casing rate of recovery is low, the construction cost height;
(2), before the artificial installation positioner, need pump drainage mud, bore hole pressure is bigger, after steel casing intensity is less than bore hole pressure, causes hole wall collapse easily, has big security risk;
(3), the drilled pile anti-group of stake of generally holding concurrently, the steel pipe column bottom need anchor in the drilled pile, repeatedly the constuction joint that forms of pour concrete is to the anti-bigger adverse effect of stressed existence of dialling of drilled pile;
(4), need repeatedly pour concrete, operation is numerous and diverse, long in time limit;
(5), after the location and installation, the pour concrete process is wayward;
(6), when steel pipe column is installed, the exposure level of locator and steel pipe column directly affects the steel pipe column verticality, but exposure level is difficult for detection.
[summary of the invention]
In order to overcome the deficiency in the background technology, technical problem to be solved by this invention provides a kind of steel pipe column at rich water soft stratum medium-length hole installation and locating method under water, this method does not only need to drop into a large amount of steel casings, need not mud in the pump drainage drilled pile, and in the work progress, can omnidistance directly measure steel pipe column verticality and center, after being offset, can in time correct, avoided that steel pipe column contacts untight uncontrollability in deviation accumulation and the traditional handicraft with locator.
For achieving the above object, the present invention adopts following technical scheme:
A kind of steel pipe column is at rich water soft stratum medium-length hole installation and locating method under water, described installation and locating method relates to cast, drilled pile, jackscrew, locating platform, the laser plummet of steel pipe column, concrete, the application or the enforcement of total powerstation, the installation of described steel pipe column in conjunction with the casting sequence of concrete, water fluence and jackscrew, locating platform is realized the location of steel pipe column; Described installation and locating method comprises following construction sequence:
A), at first pour into a mould the concrete of design height in steel pipe column, after described concrete solidified, the concrete face 40~60cm that solidifies in being higher than steel pipe column highly located, and along uniform punching on the steel pipe column circumference, jackscrew is installed in punching place;
B), measure unwrapping wire on the face of land, make the supporting pile stake position of constructing in construction, and employing rig pore-forming;
C), the drilled pile reinforcing cage is installed in step b), holing;
D), at construction face of land installing and locating platform;
The top of described locating platform is provided with the big plate in symmetrically arranged location, and the corner, bottom of described locating platform is provided with feet; The outer corners of the big plate in described location is provided with the big plate jackscrew in location, and the interior corner of the big plate in described location is provided with accurate adjustment setting screw jack;
On the construction hard place level ground of adopting the concrete sclerosis in advance, measure the angle point of emitting locating platform, and according to this angle point hoisting and locating platform; After locating platform is in place, adjust the planeness of locating platform by the feet of locating platform bottom angle point;
E), the lifting steel pipe column is gone into drilled pile endoporus in the step c);
F), face of land locating platform positioning steel tube column top;
Go out the plan-position of steel pipe column by total station survey, in steel pipe column lifts the drilled pile hole after, by regulating the big plate of location big plate jackscrew running fix, Primary Location steel pipe column; Regulate the accurate positioning steel tube of accurate setting screw jack column top then;
G), laser plummet location survey steel pipe column verticality;
Laser plummet is installed in the steel pipe column top, aims at the steel pipe column center, by red laser with steel pipe column central projection in steel pipe column;
H), jackscrew positioning steel tube column bottom;
Whether the workman is in steel pipe column in construction, measure the subpoint of red laser in steel pipe column and overlap with the steel pipe column center, and when having deviation, the adjustable screw jack is till making the steel pipe column center and laser projection point overlapping; And fixedly jackscrew makes location, steel pipe column bottom;
I), under water in drilled pile pour concrete to steel pipe column design buried depth height;
J), in the drilled pile concrete reach design strength more than 70% after, pour concrete to steel pipe pushes up in steel pipe column.
Described steel pipe column is at rich water soft stratum medium-length hole installation and locating method under water, in the described step a), and the concrete of cast in the described steel pipe column, described concrete height should satisfy (G The steel pipe deadweight+ G The concrete deadweight)>F Mud buoyancyCondition;
Wherein: G The steel pipe deadweightRepresent the steel pipe own wt
G The concrete deadweightRepresent the concrete own wt of irritating
F Mud buoyancyThe buoyancy of representing steel pipe column in mud, to be subjected to.
Described steel pipe column is at rich water soft stratum medium-length hole installation and locating method under water, and in the described step d), described locating platform is not more than 10mm to the angle point discrepancy in elevation.
Described steel pipe column is at rich water soft stratum medium-length hole installation and locating method under water, and in the described step e), described lifting steel pipe column is arranged on drilled pile endoporus center.
Because adopt aforesaid technical scheme, the present invention has following superiority:
(1) construction cost is low, keeps the mud off of drilled pile, does not need to drop into a large amount of steel casings.
(2) operation is comparatively safe, adopts the concrete back cover that the operating space is provided at the bottom of steel pipe column, does not need mud in the pump drainage drilled pile; And drilled pile adopts mud off, and the people operates in steel pipe column, the safety factor height.
(3) at the bottom of the disposal pouring concrete anchoring steel pipe column, the disposable location of steel pipe column, operation is simple, construction efficiency is high, and single stake can shift to an earlier date more than 2 days than conventional mounting technology.
(4) because in the work progress, can omnidistance directly measure steel pipe column verticality and center, after being offset, can in time correct, avoided that steel pipe column contacts untight uncontrollability in deviation accumulation and the traditional handicraft with locator, improved homework precision.
[description of drawings]
Fig. 1 is one one rod structure cross-sectional drawing of cap excavation method;
Fig. 2 is the structural representation that steel pipe column of the present invention is located under Deep-hole Water;
Fig. 3 is a steel pipe column of the present invention bottom plane of orientation structural representation;
Fig. 4 is a steel pipe column of the present invention top plane of orientation structural representation;
1, location, top jack; 2, locating platform; 3, drilled pile; 4, jackscrew; 5, construction workman; 6, concrete; 7, steel pipe column; 8, construction hard place level ground; 10, locate big plate; 11, feet; 12, accurate setting screw jack; 13, the big plate jackscrew in location; 14, supporting pile.
[specific embodiment]
With reference to the following examples, can explain the present invention in more detail; But should be noted that the present invention is not limited to following embodiment.
2~4 described steel pipe columns are at rich water soft stratum medium-length hole installation and locating method under water, and at first the concrete 6 of cast certain altitude in steel pipe column 7 is installed again; The one, utilize the dead-weight balanced steel pipe column 7 of concrete 6 and steel pipe buoyancy in the concrete in mud and drilled pile 3, the 2nd, utilize the interior mud of concrete 6 obstruct drilled piles in the steel pipe column to enter in the steel pipe column 7, for construction workman 5 provides condition to location, steel pipe column 7 middle and lower parts; And steel pipe column 7 adopts two point location methods to install, and any is located at the face of land, and any is located in drilled pile 3 holes; The face of land utilizes 2 pairs of steel pipe columns of locating platform, 7 top elevations and location, plan-position, adopts the laser plummet location survey; The location utilizes steel pipe column 7 inside spin jack 4 to adjust steel pipe column 7 and face of land verticality and fixing in drilled pile 3 holes; Behind steel pipe column 7 location, in the underwater pouring drilled pile 3 concretes to steel pipe column 7 design buried depth height, treat that concretes reach design strength 70% in the drilled pile 3 after, promptly steel pipe column 7 bottoms are restrained, concrete to steel pipes push up in the cast steel pipe column 7; Since after steel pipe column adopts back cover, upper and lower two point location methods, the precision height, controllability is good, is adapted to the installation of the interior steel pipe column of drilled pile of rich water soft stratum.
Implement steel pipe column of the present invention at rich water soft stratum medium-length hole installation and locating method under water, be installed as example with transport hub, urban culture center engineering pipe column, this project profile is:
Transport hub, cultural center, one city engineering civil engineering first bid section comprises station, Z1 line cultural center, station, Subway Line 5 cultural center and the interval engineering of west end 242.2m, and wherein the station owner of Z1 line cultural center body is that F3/B3 three is striden the cast-in-situ steel reinforced concrete frame construction; The interval engineering of station, Subway Line 5 cultural center and west end 242.2m, main body are underground two-layer three to stride the cast-in-situ steel reinforced concrete frame construction; And construction on-site groundwater table height, and have two-layer artesian water, the head relative elevation is-0.5m that lithology is mainly cohesive soil, silt, flour sand.
Design adopts lid to dig reverse construction, and the steel pipe column construction is the critical process in the reverse construction, and installation accuracy requires high, is the bearing column of station structure.This engineering adopts the bearing mode of one one post, and promptly column footing adopts φ 2200mm bored pile as bearing pile 14, and hole depth is respectively 42m and 61m; Steel pipe column has φ 800mm and two kinds of diameters of φ 1000mm, and wall thickness δ is 20mm, highly is respectively 17m and 26m, and design has 123 steel pipe columns altogether, builds C50 high-performance slightly expanded concrete concrete in the steel pipe column.Buy laser zenith meter and cooperated total station survey.
Below only be described in detail with steel pipe column accurate location and installation work progress under Subway Line 5 cultural center station Deep-hole Water, accurately the location and installation construction sequence is identical with the former under station, Z1 line cultural center and the interval engineering Deep-hole Water of west end 242.2m for steel pipe column, only be the difference of concrete construction parameter, this paper does not do detailed descriptionthe;
A), the high concrete 6 of cast 6m in the steel pipe column 7, and be higher than concrete face 50cm height, along four-quadrant point of accumulation position punching on the steel pipe column circumference, punching place welded and installed jackscrew 4 at 7 ends of steel pipe column;
φ 800mm diameter steel tubing string 7 every meter heavy G are 384.7Kg, and single steel pipe column length h is 23.1m; Concrete 6 deadweight g ' get 2.4 * 10 3KN/m 3Steel pipe column buried depth h ' in mud is 21.6m, and mud balance ω gets 1.3 * 10 3KN/m 3Concrete cast height H is calculated as follows:
G The steel pipe deadweight=G*h=384.7*23.1=8.88T
G The concrete deadweight=π * (φ/ 2-δ) 2*g '=3.14* (0.8/2-0.02) 2* H*2.4
F Mud buoyancy=ω * π * (φ/2) 2* h ' * g=1.3*3.14*0.4 2* 21.6*9.8=138KN
Should satisfy (G according to the pour concrete height The steel pipe deadweight+ G The concrete deadweight)>F Mud buoyancyCondition
F Mud buoyancy=(G The concrete deadweight+ G The steel pipe deadweight) * g
That is: H=4.8m is for guaranteeing construction safety and satisfy steel pipe column and conducted oneself with dignity to try hard to keep and hold the requirement of vertical state that need multiply by 1.2 coefficient, promptly 4.8*1.2=5.76m gets 6m;
B), measure unwrapping wire on the face of land, 14 positions of supporting pile of drawing adopt rotary drilling rig to finish Φ 2.2m supporting pile pore-forming in construction;
C), drilled pile 3 reinforcing cages are installed in step b), holing;
D), on the construction face of land rectangle locating platform 2 is installed;
The top of described rectangle locating platform 2 is provided with the big plate 10 in symmetrically arranged location, and the corner, bottom of described rectangle locating platform 2 is provided with feet 11; The outer corners of the big plate 10 in described location is provided with the big plate jackscrew 13 in location, and the interior corner of the big plate 10 in described location is provided with accurate adjustment setting screw jack 12;
On the construction hard place level ground of adopting the concrete sclerosis in advance, measure four angle points of emitting locating platform, and according to four angle point hoisting and locating platforms 2; After locating platform was in place, the feet 11 by locating platform bottom angle point was adjusted the planeness of locating platforms, makes locating platform be not more than 10mm to the angle point discrepancy in elevation;
E), lifting steel pipe column 7 is gone into drilled pile 3 endoporus in the step c);
F), face of land locating platform 2 positioning steel tube posts 7 tops;
Go out steel pipe column 7 plan-positions by total station survey, after steel pipe column 7 liftings are gone in drilled pile 3 holes, by regulating the big plate 10 of big plate jackscrew 13 running fixes in location, realize the Primary Location steel pipe column, regulate accurate setting screw jack 12 accurate positioning steel tube column tops then; Be that location, top jack 1 is made of the big plate jackscrew 13 in location, accurate setting screw jack 12 two parts;
G), laser plummet location survey steel pipe column verticality;
Laser plummet is installed in steel pipe column 7 tops, aims at the steel pipe column center, by red laser with steel pipe column central projection in steel pipe column;
H), jackscrew positioning steel tube column bottom;
Whether workman 5 is in steel pipe column 7 in construction, measure the subpoint of red laser in steel pipe column and overlap with the steel pipe column center, and when having deviation, adjustable screw jack 4 is till making steel pipe column 7 centers and laser projection point overlapping; And fixedly jackscrew 4 makes location, steel pipe column 7 bottoms;
I), in drilled pile 3 pour concrete 3m to steel pipe column 7 bottoms, satisfy design anchoring requirement;
J), by detecting concrete test specimen intensity with the condition maintenance, judge in the drilled pile 3 concretes reach design strength 70% or more after, cast steel pipe column 7 interior concrete to steel pipes push up.
In the present embodiment, the concrete 6 of certain altitudes in the steel pipe column 7 of applying in a flexible way has solved mud buoyancy and locatees under water the operating space is provided for construction workman 5 implements steel pipe columns 7; Adopt laser plummet to guarantee certainty of measurement; By two point location method and jackscrew of steel pipe column 7, the squareness measurement and the location of having realized steel pipe column 7; This worker's method is simple to operate, work efficiency is high, cost is low, precision is high and controlled, and security risk is little, has guaranteed engineering safety, high-quality, has implemented smoothly.
If adopt traditional steel cylinder-wall protecting construction worker method, the every steel pipe column in station, Subway Line 5 cultural center need drop into 23.7T steel casing, the every steel pipe column in station, Z1 line cultural center need drop into 33.3T steel casing, only one of steel casing cost of materials has just spent ten thousand yuan of 23.7T/ root * 50 piece * 6000 yuan/T+33.3T/ roots * 73 * 6000 yuan/T=2170, construction cost height on cost.Simultaneously, behind pump drainage mud, the stratum of bigger hydraulic pressure and weakness is to steel casing safety requirements height, and engineering risk is big.
Steel pipe column of the present invention is at the rich water soft stratum medium-length hole accurate practical function of location and installation worker method in this construction once under water:
The installation of first steel pipe column of this engineering, only 1 day engineering time, construction speed meets design requirement.Compare with conventional steel casing construction technology, saved in time about 2 days, only one of steel casing cost of materials has just been saved ten thousand yuan of 23.7T/ root * 50 piece * 6000 yuan/T+33.3T/ roots * 73 * 6000 yuan/T=2170 on cost.
The present invention adopts described worker's method to obtain good economic benefit and social benefit, makes a concrete analysis of as follows:
(1) economic benefit: the application of this novel construction method, high efficiency is installed accurately, and is simple to operate; Particularly do not need to drop into more steel cylinder-wall protecting, carry out the mud pump drainage, obtained remarkable economic efficiency.
(2) social benefit: the application of this novel construction method, construction safety degree height, steel pipe column are once accurately located, and speed of application is fast, and later similar engineering is had fine directive function.
Need to prove that at this jackscrew and laser plummet are existing mature technique equipment, so the present invention is not further described and limits.
The embodiment that selects for use in this article in order to disclose purpose of the present invention currently thinks to suit, but will be appreciated that, the present invention is intended to comprise that all belong to all changes and the improvement of the interior embodiment of this design and the scope of the invention.

Claims (4)

1. a steel pipe column is at rich water soft stratum medium-length hole installation and locating method under water, it is characterized in that: described installation and locating method relates to the application or the enforcement of the cast of installation, concrete (6) of steel pipe column (7) and drilled pile (3), jackscrew (4), locating platform (2), laser plummet, total powerstation, the installation of described steel pipe column (7) in conjunction with the casting sequence of concrete (6), water fluence and jackscrew (4), locating platform (2) is realized the location of steel pipe column (7); Described installation and locating method comprises following construction sequence:
A), at first pour into a mould the concrete (6) of design height in steel pipe column (7), after described concrete (6) solidified, the concrete face 40~60cm that solidifies in being higher than steel pipe column (7) highly located, and along uniform punching on steel pipe column (7) circumference, jackscrew (4) is installed in punching place;
B), measure unwrapping wire on the face of land, make the institute's supporting pile of construct (14) stake and employing rig pore-forming in construction;
C), drilled pile (3) reinforcing cage is installed in step b), holing;
D), at construction face of land installing and locating platform (2);
The top of described locating platform (2) is provided with the big plate in symmetrically arranged location (10), and the corner, bottom of described locating platform (2) is provided with feet (11); The outer corners of the big plate in described location (10) is provided with location big plate jackscrew (13), and the interior corner of the big plate in described location (10) is provided with accurate adjustment setting screw jack (12);
On the construction hard place level ground of adopting the concrete sclerosis in advance, measure the angle point of emitting locating platform, and according to this angle point hoisting and locating platform (2); After locating platform is in place, adjust the planeness of locating platform by the feet (11) of locating platform bottom angle point;
E), lifting steel pipe column (7) is gone into drilled pile in the step c) (3) endoporus;
F), face of land locating platform (2) positioning steel tube post (7) top;
Go out the plan-position of steel pipe column by total station survey, in steel pipe column lifts the drilled pile hole after, by regulating the location big plate of big plate jackscrew (13) running fix (10), Primary Location steel pipe column; Regulate accurately positioning steel tube post (7) top of accurate setting screw jack (12) then;
G), laser plummet location survey steel pipe column verticality;
Laser plummet is installed in the steel pipe column top, aims at the steel pipe column center, by red laser with steel pipe column central projection in steel pipe column;
H), jackscrew positioning steel tube column bottom;
Whether construction workman (5) measures the subpoint of red laser in steel pipe column and overlaps with the steel pipe column center in steel pipe column, and when having deviation, adjustable screw jack (4) is till making the steel pipe column center and laser projection point overlapping; And fixedly jackscrew makes location, steel pipe column (7) bottom;
I), under water in drilled pile (3) pour concrete (6) to steel pipe column design buried depth height;
J), the interior concrete of drilled pile (3) reach design strength more than 70% after, pour concrete (6) to steel pipe pushes up in steel pipe column (7).
2. steel pipe column according to claim 1 is characterized in that at rich water soft stratum medium-length hole installation and locating method under water: in the described step a), and the concrete (6) of cast in the described steel pipe column (7), described concrete height should satisfy (G The steel pipe deadweight+ G The concrete deadweight)>F Mud buoyancyCondition;
Wherein: G The steel pipe deadweightRepresent the steel pipe own wt
G The concrete deadweightRepresent the concrete own wt of irritating
F Mud buoyancyThe buoyancy of representing steel pipe column in mud, to be subjected to.
3. steel pipe column according to claim 1 is characterized in that at rich water soft stratum medium-length hole installation and locating method under water: in the described step d), described locating platform (2) is not more than 10mm to the angle point discrepancy in elevation.
4. steel pipe column according to claim 1 is characterized in that at rich water soft stratum medium-length hole installation and locating method under water: in the described step e), the steel pipe column of described lifting (7) is arranged on drilled pile (3) endoporus center.
CN 201010139418 2010-03-26 2010-03-26 Deep hole underwater installation and locating method of steel pipe column in weak watery stratum CN101824919B (en)

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CN102587386A (en) * 2012-02-01 2012-07-18 中国建筑第八工程局有限公司 Reverse HPE (hydraulic perpendicular embedding) construction method for steel pipe columns in basement
CN106836200A (en) * 2017-01-20 2017-06-13 中国建筑第四工程局有限公司 One kind is applied to steel column construction technology under low clearance

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