CN108316283A - The devices and methods therefor of influence of foundation excavation is controlled using hole rising pouring slurry ground-connecting-wall - Google Patents

The devices and methods therefor of influence of foundation excavation is controlled using hole rising pouring slurry ground-connecting-wall Download PDF

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Publication number
CN108316283A
CN108316283A CN201810076009.9A CN201810076009A CN108316283A CN 108316283 A CN108316283 A CN 108316283A CN 201810076009 A CN201810076009 A CN 201810076009A CN 108316283 A CN108316283 A CN 108316283A
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China
Prior art keywords
ground
pipe
excavation
inclinometer
grouting
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CN201810076009.9A
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Chinese (zh)
Inventor
刁钰
郑刚
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Tianjin University
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Tianjin University
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Priority to CN201810076009.9A priority Critical patent/CN108316283A/en
Publication of CN108316283A publication Critical patent/CN108316283A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/18Bulkheads or similar walls made solely of concrete in situ
    • E02D5/187Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints

Abstract

The invention discloses a kind of devices controlling influence of foundation excavation using hole rising pouring slurry ground-connecting-wall; including being arranged in the ground-connecting-wall for being intended to construction area between the soil body of protection zone; multiple inclinometer pipes are equipped in ground-connecting-wall; the top for being located at the side for being intended to construction area of ground-connecting-wall is equipped with the horizontally-supported and multiple Grouting Pipe of multiple tracks, and position of multiple Grouting Pipes on the length direction of ground-connecting-wall and the position of multiple inclinometer pipes correspond.Traditional axial force of the supports SERVO CONTROL only can play control action to building enclosure deformation more than excavation face, effectively control is lacked to the deformation of the following building enclosure of excavation face, the present invention is using hole bottom ground-connecting-wall dynamic slip casting, marginal not slurry is excavated on side, makes ground-connecting-wall in the case where deforming very little, and passive lateral balance pressure is provided with slip casting, realize the Stress Control of passive area in foundation pit, the deformation of hole bottom building enclosure control effectively when to excavating every time, easy to operate, of low cost.

Description

The devices and methods therefor of influence of foundation excavation is controlled using hole rising pouring slurry ground-connecting-wall
Technical field
The present invention relates to Foundation Pit Construction technical fields more particularly to a kind of use to cheat rising pouring slurry ground-connecting-wall control foundation pit Excavate the devices and methods therefor influenced.
Background technology
With the fast development in city, Urban underground Tunnel puts into effect more and more, and urban land is nervous in addition, base The environmental condition on hole periphery becomes to become increasingly complex, and it is unfavorable that deep big foundation pit off-load will bring its displacement field and surrounding enviroment facility It influences, and foundation pit is also increasingly strict on the deformation controlling standards influenced produced by surrounding enviroment.Influence of the foundation pit to surrounding enviroment Deformation control is by the Centimeter Level Deformation control requirement to neighbouring existing building, road, underground utilities, viaduct etc., development To the grade Deformation control requirement to neighbouring operated subway, high ferro, airport etc., especially deformation of the deep basal pit to base pit engineering Control theory, methods and techniques are challenged.Axial force of the supports SERVO CONTROL is to control the common method of foundation pit enclosure structure deformation, But axial force of the supports SERVO CONTROL only can play control action to building enclosure deformation more than excavation face, to being enclosed below excavation face The deformation of protection structure lacks effectively control.Foundation pit is supported for band, is either often walked in digging process, or final excavate is completed When, the maximum displacement of foundation pit enclosure structure is often happened under most lower support together.Therefore, when the neighbouring structures such as tunnel When below excavation face, axial force of the supports SERVO CONTROL lacks directly effective control to the deformation of bottom of foundation ditch building enclosure.
At present using axial force of the supports SERVO CONTROL to the deformation rectifying effect of the foundation pit enclosure structure periphery soil body often not Efficiently, economical, it is primarily present following defect:
First, take axial force of the supports SERVO CONTROL only can play control to building enclosure deformation more than excavation face at present Effect lacks effectively control to the deformation of the following building enclosure of excavation face.
Second, in Excavation Process axial force of the supports SERVO CONTROL be difficult to it is accurate, timely, neatly to building enclosure become Shape carries out control and pressure compensation.
Therefore, a kind of controllable building enclosure soil deformation of research and development simultaneously can be in digging process accurately, in time, neatly Carry out the active demand that pressure compensated device is existing market development.
Invention content
The present invention is realized the Stress Control of soil passive area in bottom in foundation pit, is made ground using hole bottom ground-connecting-wall dynamic slip casting Even wall provides the balance pressure of the passive side soil body with slip casting in the case where deforming very little.It is opened in the soil body for being embedded with ground-connecting-wall When digging foundation pit, stage excavation is carried out.Before excavation, inclinometer pipe is buried in ground-connecting-wall.In Excavation Process, to hole bottom Slip casting is carried out at prefabricated slip casting point, provides balance pressure to the passive side of bottom of foundation ditch with slip casting, side excavates marginal not slurry, passes through sight The soil body strain that inclinometer pipe is shown is surveyed to meet the requirements to control the deformation of bottom of foundation ditch.
In order to solve the above-mentioned technical problem, proposed by the present invention a kind of using hole rising pouring slurry ground-connecting-wall control excavation of foundation pit shadow Loud device, including be arranged in the ground-connecting-wall for being intended to construction area between the soil body of protection zone, the ground-connecting-wall and be equipped with multiple surveys Inclined tube, multiple inclinometer pipes are uniformly distributed for 3~5m according to spacing along the length of ground-connecting-wall, and being located at for the ground-connecting-wall is intended to construction area The top of side is equipped with the horizontally-supported and multiple Grouting Pipe of multiple tracks, and the number of Grouting Pipe is identical as the number of inclinometer pipe, multiple notes It starches position of the pipe on the length direction of ground-connecting-wall and the position of multiple inclinometer pipes corresponds.
Further, the present invention controls the device of influence of foundation excavation using hole rising pouring slurry ground-connecting-wall, wherein the slip casting The length of pipe and highly consistent, a diameter of 100~300mm of the Grouting Pipe of ground-connecting-wall, the Grouting Pipe select pvc pipe.
The length of the inclinometer pipe and ground-connecting-wall it is highly consistent.
A kind of method using hole rising pouring slurry ground-connecting-wall control influence of foundation excavation proposed by the present invention, including following step Suddenly:
Step 1: after surveying and locating, according to surveying and locating as a result, excavating groove;
Step 2: making steel reinforcement cage according to design requirement, multiple inclinometer pipes are installed on steel reinforcement cage according to design requirement, When reinforcing bar cage hoisting is in place, keep the position for installing inclinometer pipe thereon substantially straight;And the fresh water pouring in inclinometer pipe, reinforcing bar By the nozzle temporary closure of inclinometer pipe after cage is in place;
Step 3: at wall concreting, the placing concrete after steel reinforcement cage enters slot is not yet solidifying in concrete casting complete Gu when, the nozzle for opening inclinometer pipe checks continually in inclinometer pipe whether be full of clear water, water filling is carried out when necessary, to ensure in coagulation Clear water is full-water level in inclinometer pipe pipe before soil solidification, and the ground-connecting-wall for being provided with row's inclinometer pipe is formed after concrete setting, It will all be replaced into clear water in the pipe of inclinometer pipe;
Step 4: a row and multiple one-to-one Grouting Pipes in inclinometer pipe position are installed along ground-connecting-wall length direction,
Step 5: excavation of foundation pit, when excavation pit, the slip casting into Grouting Pipe, by observe the numerical value change of inclinometer pipe come Control protection zone soil deformation;With the intensification of excavation of foundation pit depth, on the top positioned at the side of foundation pit of the ground-connecting-wall Add it is horizontally-supported, meanwhile, remove excavation face more than Grouting Pipe, according to requirement of engineering continue the slip casting below excavation face, with Ensure soil deformation requirement;Aforesaid operations are repeated until excavation of foundation pit is completed.
Compared with prior art, the beneficial effects of the invention are as follows:
(1) precise controlling can be achieved in the present invention:By controlling the grouting amount in prefabricated slip casting point, inclinometer pipe number is observed in time Value variation, realizes the precise controlling to protection zone soil deformation.
(2) multiple slip casting can be achieved in the present invention:It, can be due to having reserved multiple prefabricated slip casting points at different depth position It is realized in digging process and accurately, in time, neatly carries out pressure compensation to control the soil deformation of building enclosure.
Description of the drawings
Fig. 1 is ground-connecting-wall construction schematic diagram in the present invention;
Fig. 2 is excavation of foundation pit grouting behind shaft or drift lining elevational schematic view;
Fig. 3 is the floor map of excavation of foundation pit grouting behind shaft or drift lining shown in Fig. 2;
Fig. 4 is next stage excavation of foundation pit grouting behind shaft or drift lining schematic diagram.
In figure:1- is intended to construction area, and the protection zones the 2- soil body, 3- ground-connecting-walls, 4- inclinometer pipes, 5- is horizontally-supported, 6- Grouting Pipes.
Specific implementation mode
Technical solution of the present invention is described in further detail in the following with reference to the drawings and specific embodiments, it is described specific Embodiment is only explained the present invention, is not intended to limit the invention.
As shown in Figures 2 and 3, a kind of dress using hole rising pouring slurry ground-connecting-wall control influence of foundation excavation proposed by the present invention It sets, including is arranged in the ground-connecting-wall 3 for being intended to construction area 1 between the protection zone soil body 2, the ground-connecting-wall 3 and is equipped with multiple deviational surveys Pipe 4, multiple inclinometer pipes 4 are uniformly distributed for 3~5m according to spacing along the length of ground-connecting-wall 3, as shown in figure 3, the length of the inclinometer pipe 4 It is highly consistent with ground-connecting-wall 3.The top for being located at the side for being intended to construction area 1 of the ground-connecting-wall 3 is equipped with multiple tracks horizontally-supported 5 It is identical as the number of inclinometer pipe 4 with the number of multiple Grouting Pipes 6, Grouting Pipe 6, as shown in figure 3, multiple Grouting Pipes 6 are in ground-connecting-wall 3 Length direction on the positions of position and multiple inclinometer pipes 4 correspond.As shown in Fig. 2, the length of the Grouting Pipe 6 and ground Even highly consistent, a diameter of 100~300mm of the Grouting Pipe 6 of wall 3, the Grouting Pipe 6 select pvc pipe.
Utilize the side proposed by the present invention for controlling the device progress slip casting of influence of foundation excavation using rising pouring slurry ground-connecting-wall is cheated Method includes the following steps:
Step 1: after surveying and locating, according to surveying and locating as a result, excavating groove;
Surveying and locating includes positioning calibration control point and leads wall measurement, is conducive to protection on construction ground and the place of setting-out is set Surface traverse point is set, is recorded according to plane delivery receiving stake, is introduced at control point in place using total powerstation, setting-out goes out surface traverse point Plane coordinates.The coordinate provided according to design drawing calculates ground-connecting-wall centerline angles point coordinates, is controlled using surface traverse Point goes out ground-connecting-wall angle point with theodolite setting-out on the spot, and performs fender pile immediately.
Groove is excavated according to setting-out achievement, pours plain concrete bed die bed course, assembling reinforcement, formwork finally pours and leads wall Concrete.During ground-connecting-wall grooving, ensures the stabilization of cell wall using mud off, prevent from collapsing.
Excavating groove includes:Box cut section uses machinery to scrape out unit construction slot section with " jumping hole mining method ".The grooving earthwork Outward transport.It takes and entruckings outward transport on one side while shoveling.Slot section quality inspection, reasonable arrangement per slot section in grab the sequence of operation and grab number, Ensure that verticality and the device installation of cell wall both direction are good, and meets the requirement of grooving precision 3 ‰.
It removes the soil quarrel mud for being deposited on trench bottom, and viscosity in displacement slot, proportion or the excessive mud of silt content, makes complete Slot mud all meets the quality requirement of mud behind clear bottom.It reasonably selects according to field condition and hangs brush, to ensure brush finish and connector face It is in close contact and cleans effect with water to reach.
Step 2: making steel reinforcement cage according to design requirement, multiple inclinometer pipes 4 are installed in steel reinforcement cage according to design requirement On, using aluminum self-plugging rivet diameter 4mm jointings and tube body.Choosing suitable connector water-stop pattern prevents concrete from pouring Slurries, which are leak into, when building blocks inclinometer pipe in pipe.The inclinometer pipe connected is pre-installed in steel reinforcement cage.Installation site is except guarantee Outside deviational survey requires, should ensure that can avoid safely concrete delivery pipe base opening and be avoided that vibrator is directly hit, with protection Inclinometer pipe;It when necessary can be outside inclinometer pipe plus safeguard measure such as shield muscle retaining ring is at the tube bottom and deriving structure or ground within the scope of 2m Add protection steel cylinder, but safeguard measure should not have an adverse effect to other aspects.Setting the inclinometer pipe of installation site must cut It is fixed on steel reinforcement cage in fact.Thicker main reinforcement is typically chosen as fixed anaclitic object, is bundled with soft iron silk;Adjacent 2 bundles Spacing a little is tied up no more than 1m.One group in inclinometer pipe cross guide groove is also set to be in deviational survey after steel reinforcement cage is in place when fixed The directions ± A on.
When reinforcing bar cage hoisting is in place, it should be noted that keep inclinometer pipe 4 attached thereto substantially straight, avoided macrobending;And It buoyancy and must prevent slurry coat method from penetrating into overcome by fresh water pouring in inclinometer pipe 4, or prevent cement grout when cast from penetrating into. 4 nozzle temporary closure of inclinometer pipe should be entered to prevent foreign matter after steel reinforcement cage is in place.
Step 3: at wall concreting, suitable concrete proportioning is selected according to design requirement.Enter slot 4 in steel reinforcement cage Start placing concrete in hour.In concrete casting complete ot-yet-hardened, the nozzle for opening inclinometer pipe 4 checks continually on deviational survey Whether it is full of clear water in pipe 4, water filling is carried out when necessary, to ensure that inclinometer pipe 4 manages interior clear water as full-water level before concrete setting. And can suitably be pressurizeed with weight in nozzle, help overcomes buoyancy.Stop slip casting after reaching design grouting amount.Concrete is solidifying After Gu, it is necessary to the clear water hole flushing of appropriate pressure, rush the deposit of inclinometer pipe tube bottom to the greatest extent, make in inclinometer pipe pipe up and down entirely by clear water Displacement, holding are managed unimpeded entirely.The ground-connecting-wall 3 for being provided with row's inclinometer pipe 4 is formed after concrete setting, as shown in Figure 1.It will It is all replaced into clear water in the pipe of inclinometer pipe 4;
Step 4: installing a row and the one-to-one Grouting Pipe 6 in multiple inclinometer pipe positions along 3 length direction of ground-connecting-wall, such as Shown in Fig. 2 and Fig. 3.
Step 5: excavation of foundation pit, when excavation pit, the slip casting into Grouting Pipe 6 passes through the numerical value change for observing inclinometer pipe 4 Protection zone soil deformation is controlled, to meet soil deformation requirement.With the intensification of excavation of foundation pit depth, in the ground-connecting-wall 3 The top positioned at the side of foundation pit add horizontally-supported 5, as shown in Figure 2 and Figure 4.Meanwhile removing the slip casting of excavation face or more Pipe 6 continues the slip casting below excavation face, to ensure soil deformation requirement according to requirement of engineering;Aforesaid operations are repeated until foundation pit It excavates and completes.
Water pipe is inserted to Grouting Pipe bottom after the completion of slip casting, residual slurry in cleaning pipe, in case repeating slip casting.
Traditional axial force of the supports SERVO CONTROL only can play control action to building enclosure deformation more than excavation face, Effectively control is lacked to the deformation of the following building enclosure of excavation face, hole bottom ground-connecting-wall dynamic slip casting, Bian Kai may be implemented in the present invention Marginal not slurry is dug, makes ground-connecting-wall in the case where deforming very little, passive lateral balance pressure is provided with slip casting, realizes passive area in foundation pit Stress Control, to excavating every time when hole bottom building enclosure deformation control effectively, it is easy to operate, it is of low cost.
Although above in conjunction with attached drawing, invention has been described, and the invention is not limited in above-mentioned specific implementations Mode, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art are at this Under the enlightenment of invention, without deviating from the spirit of the invention, many variations can also be made, these belong to the present invention's Within protection.

Claims (4)

1. it is a kind of using hole rising pouring slurry ground-connecting-wall control influence of foundation excavation device, including setting be intended to construction area (1) in Ground-connecting-wall (3) between the protection zone soil body (2), which is characterized in that multiple inclinometer pipes (4) are equipped in the ground-connecting-wall (3), it is multiple Inclinometer pipe (4) is uniformly distributed for 3~5m according to spacing along the length of ground-connecting-wall (3), and being located at for the ground-connecting-wall (3) is intended to construction area (1) top of side is equipped with multiple tracks horizontally-supported (5) and multiple Grouting Pipes (6), number and the inclinometer pipe (4) of Grouting Pipe (6) Number it is identical, the position one of position and multiple inclinometer pipes (4) of multiple Grouting Pipes (6) on the length direction of ground-connecting-wall (3) One corresponds to.
2. according to claim 1 using the device of hole rising pouring slurry ground-connecting-wall control influence of foundation excavation, which is characterized in that institute State the length of Grouting Pipe (6) and highly consistent, a diameter of 100~300mm of the Grouting Pipe (6) of ground-connecting-wall (3), the note Slurry pipe (6) selects pvc pipe.
3. according to claim 1 using the device of hole rising pouring slurry ground-connecting-wall control influence of foundation excavation, which is characterized in that institute State the highly consistent of the length of inclinometer pipe (4) and ground-connecting-wall (3).
4. a kind of method using hole rising pouring slurry ground-connecting-wall control influence of foundation excavation, which is characterized in that using such as claim Any device using hole rising pouring slurry ground-connecting-wall control influence of foundation excavation in 1-3, and include the following steps:
Step 1: after surveying and locating, according to surveying and locating as a result, excavating groove;
Step 2: making steel reinforcement cage according to design requirement, multiple inclinometer pipes (4) are installed on steel reinforcement cage according to design requirement, When reinforcing bar cage hoisting is in place, keep the position for installing inclinometer pipe (4) thereon substantially straight;And perfusion is clear in inclinometer pipe (4) Water, by the nozzle temporary closure of inclinometer pipe (4) after steel reinforcement cage is in place;
Step 3: at wall concreting, the placing concrete after steel reinforcement cage enters slot, in concrete casting complete ot-yet-hardened When, the nozzle for opening inclinometer pipe (4) checks continually in inclinometer pipe (4) whether be full of clear water, water filling is carried out when necessary, to ensure Clear water is full-water level in inclinometer pipe (4) pipe before concrete setting, is formed after concrete setting and is provided with row's inclinometer pipe (4) Ground-connecting-wall (3), will all be replaced into clear water in the pipe of inclinometer pipe (4);
Step 4: a row and multiple one-to-one Grouting Pipes in inclinometer pipe position (6) are installed along ground-connecting-wall (3) length direction,
Step 5: excavation of foundation pit, when excavation pit, to Grouting Pipe (6) interior slip casting, pass through the numerical value change for observing inclinometer pipe (4) To control protection zone soil deformation;With the intensification of excavation of foundation pit depth, in the ground-connecting-wall (3) positioned at the side of foundation pit Top is added horizontally-supported (5), meanwhile, remove excavation face more than Grouting Pipe (6), according to requirement of engineering continue excavation face with Lower slip casting, to ensure soil deformation requirement;Aforesaid operations are repeated until excavation of foundation pit is completed.
CN201810076009.9A 2018-01-25 2018-01-25 The devices and methods therefor of influence of foundation excavation is controlled using hole rising pouring slurry ground-connecting-wall Pending CN108316283A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111501860A (en) * 2020-04-23 2020-08-07 腾达建设集团股份有限公司 Foundation pit enclosure deformation control device and system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111501860A (en) * 2020-04-23 2020-08-07 腾达建设集团股份有限公司 Foundation pit enclosure deformation control device and system

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