CN210768836U - Underground excavation tunnel and supporting construction thereof - Google Patents
Underground excavation tunnel and supporting construction thereof Download PDFInfo
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- CN210768836U CN210768836U CN201921515684.3U CN201921515684U CN210768836U CN 210768836 U CN210768836 U CN 210768836U CN 201921515684 U CN201921515684 U CN 201921515684U CN 210768836 U CN210768836 U CN 210768836U
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Abstract
The utility model discloses an undercut tunnel and supporting construction thereof, the supporting construction in undercut tunnel includes: the primary lining support layer is arranged by being attached to the inner wall of the underground excavated tunnel; the waterproof layer is arranged opposite to the primary lining support layer, a first gap is formed by the waterproof layer and the primary lining support layer in an enclosing mode, and the waterproof layer is provided with a first through hole used for being communicated with the first gap; and the first grouting element is used for penetrating through the first through hole and injecting plugging slurry into the first gap. The supporting structure can eliminate the gap between the lining layer and the waterproof plate, avoid the problem of water leakage and ensure the construction safety; so, adopt supporting construction's undercut tunnel can not appear moisture seepage problem, construction safety.
Description
Technical Field
The utility model relates to an undercut tunnel support technical field, concretely relates to undercut tunnel and supporting construction thereof.
Background
During the construction of the underground excavation tunnel, corresponding supporting structures are required to be added frequently to ensure the safety of construction. Traditional supporting construction is including setting up two-layer lining layer at least on the undercut tunnel inner wall and setting up the waterproof board between two adjacent lining layers. The supporting performance of the lining layer is utilized to stably support the underground excavated tunnel so as to avoid deformation or collapse of the underground excavated tunnel. Traditional supporting construction is in the work progress, because the influence between construction error or the process, the back is accomplished in the construction, easily appears the clearance between lining layer and the waterproof board to the problem of moisture seepage easily appears, is unfavorable for construction safety.
SUMMERY OF THE UTILITY MODEL
On the basis, the underground excavation tunnel and the supporting structure thereof are provided, the supporting structure can eliminate the gap between the lining layer and the waterproof plate, the problem of moisture leakage is avoided, and the construction safety is ensured; so, adopt supporting construction's undercut tunnel can not appear moisture seepage problem, construction safety.
The technical scheme is as follows:
in one aspect, a supporting structure of an underground excavation tunnel is provided, including: the primary lining support layer is arranged by being attached to the inner wall of the underground excavated tunnel; the waterproof layer is arranged opposite to the primary lining support layer, a first gap is formed by the waterproof layer and the primary lining support layer in an enclosing mode, and the waterproof layer is provided with a first through hole used for being communicated with the first gap; and the first grouting element is used for penetrating through the first through hole and injecting plugging slurry into the first gap.
Above-mentioned supporting construction in undercut tunnel, during the construction, the inner wall in laminating undercut tunnel carries out the construction of just lining to form the first lining supporting layer that can carry out preliminary support to the inner wall in undercut tunnel, guarantee tentatively that the undercut tunnel can not take place to warp easily or collapse. The inner wall of the primary lining supporting layer facing the underground excavated tunnel is provided with the corresponding waterproof layer, so that water is prevented from permeating into the subsequent supporting layer, the supporting structure can stably and reliably exert the supporting performance, and the corrosion caused by water is avoided. Meanwhile, due to the influence of construction errors or installation errors, a first gap is left between the waterproof layer and the primary lining support layer. A first through hole communicated with the first gap is formed in the waterproof layer in a drilling mode and the like, so that the first gap can be conveniently and correspondingly blocked. Utilize first slip casting component to pour into the first clearance with the shutoff thick liquid in to can eliminate first clearance, avoid appearing the problem of moisture seepage, guarantee construction safety, can also eliminate hidden danger such as subside, cavity and frost heaving, especially to severe cold district, eliminate the back to first clearance, can effectively eliminate the frost heaving problem.
The technical solution is further explained below:
in one embodiment, at least two first through holes are arranged at intervals along the circumferential direction of the waterproof layer.
In one embodiment, the supporting structure of the underground excavated tunnel further includes a first pressure detection element disposed in the first gap, and the first pressure detection element is electrically connected to the first grouting element.
In one embodiment, the first grouting element comprises a first grouting pipe inserted into the first gap after passing through the first through hole, and a first pressurizer used for pressurizing the plugging slurry and injecting the plugging slurry into the first grouting pipe.
In one embodiment, the supporting structure of the underground excavated tunnel further comprises two lining supporting layers and a second grouting element, the two lining supporting layers are arranged in a manner of being attached to the inner wall of the waterproof layer, a second gap is formed between the two lining supporting layers and the waterproof layer in an enclosing manner, the two lining supporting layers are provided with second through holes used for being communicated with the second gap, and the second grouting element is used for penetrating through the second through holes and injecting plugging slurry into the second gap.
In one embodiment, the supporting structure of the underground excavated tunnel further includes a second pressure detection element disposed in the second gap, and the second pressure detection element is electrically connected to the second grouting element.
In one embodiment, the second grouting element comprises a second grouting pipe inserted into the second gap after passing through the second through hole, and a second pressurizer for pressurizing the plugging slurry and injecting the plugging slurry into the second grouting pipe.
In one embodiment, the second through hole is disposed corresponding to the first through hole, the second grouting pipe extends into the second gap, the first grouting pipe is sleeved in the second grouting pipe and extends into the first gap, and the supporting structure of the underground excavated tunnel further includes a switching valve for controlling the connection and disconnection of the first grouting pipe and the second grouting pipe.
In one embodiment, the supporting structure of the underground excavation tunnel further comprises an auxiliary supporting piece which is vertically arranged, the auxiliary supporting piece is arranged inside the underground excavation tunnel, one end of the auxiliary supporting piece is arranged on the bottom wall of the underground excavation tunnel, and the other end of the supporting piece is arranged on the two lining supporting layers.
On the other hand, the underground excavation tunnel is provided, and the supporting structure is arranged inside the underground excavation tunnel.
Above-mentioned undercut tunnel, undercut tunnel excavation accomplish the back, and the inner wall in laminating undercut tunnel carries out the construction of just lining to form the first lining supporting layer that can carry out preliminary support to the inner wall in undercut tunnel, guarantee preliminarily that undercut tunnel can not take place to warp easily or collapse. The inner wall of the primary lining supporting layer facing the underground excavated tunnel is provided with the corresponding waterproof layer, so that water is prevented from permeating into the subsequent supporting layer, the supporting structure can stably and reliably exert the supporting performance, and the corrosion caused by water is avoided. Meanwhile, due to the influence of construction errors or installation errors, a first gap is left between the waterproof layer and the primary lining support layer. A first through hole communicated with the first gap is formed in the waterproof layer in a drilling mode and the like, so that the first gap can be conveniently and correspondingly blocked. The first grouting element is utilized to inject the plugging slurry into the first gap, so that the first gap can be eliminated, the problem of water leakage is avoided, the construction safety is ensured, hidden dangers such as settlement, cavities and frost heaving can be eliminated, and particularly, the frost heaving problem can be effectively eliminated after the first gap is eliminated for the alpine region.
Drawings
Fig. 1 is a schematic structural view of a supporting structure of an underground excavated tunnel according to an embodiment;
fig. 2 is a partially enlarged view of a portion a of the supporting structure of the excavated tunnel of fig. 1.
Description of reference numerals:
100. the lining support layer comprises a primary lining support layer 200, a waterproof layer 210, a first through hole 300, a first gap 410, a first grouting pipe 500, a secondary lining support layer 510, a second through hole 600, a second gap 710, a second grouting pipe 800, a switching valve 900 and an auxiliary support.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "disposed on," "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured" to, or "fixedly coupled" to another element, it can be removably secured or non-removably secured to the other element. When an element is referred to as being "connected," "pivotally connected," to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the present invention, the terms "first", "second", "third", and the like do not denote any particular quantity or order, but rather are used to distinguish one name from another.
As shown in fig. 1 and 2, in one embodiment, there is provided a supporting structure of an underground excavated tunnel, including: the primary lining support layer 100 is arranged by adhering the primary lining support layer 100 to the inner wall of the underground excavated tunnel; the waterproof layer 200 is arranged opposite to the primary lining support layer 100, a first gap 300 is formed by the waterproof layer 200 and the primary lining support layer 100 in an enclosing mode, and the waterproof layer 200 is provided with a first through hole 210 used for being communicated with the first gap 300; and a first grouting member for passing through the first through hole 210 and injecting plugging paste into the first gap 300.
The supporting construction in undercut tunnel of above-mentioned embodiment, during the construction, the inner wall in laminating undercut tunnel carries out the primary lining construction to form the primary lining supporting layer 100 that can carry out preliminary support to the inner wall in undercut tunnel, guarantee preliminarily that undercut tunnel can not take place deformation or collapse easily. The corresponding waterproof layer 200 is arranged on the inner wall of the primary lining supporting layer 100 facing the underground excavated tunnel, so that water is prevented from permeating into the subsequent supporting layer, the supporting structure can stably and reliably exert the supporting performance, and the corrosion caused by water is avoided. Meanwhile, a first gap 300 may be left between the waterproof layer 200 and the primary backing support layer 100 due to the influence of construction errors or installation errors. The first through hole 210 communicated with the first gap 300 is formed on the waterproof layer 200 by drilling or the like, so that the first gap 300 can be conveniently and correspondingly sealed and treated subsequently. Utilize first slip casting component to pour into the first clearance 300 with the shutoff thick liquid in to can eliminate first clearance 300, avoid appearing the problem of moisture seepage, guarantee construction safety, can also eliminate hidden danger such as subside, cavity and frost heaving, especially to high and cold area, eliminate the back to first clearance 300, can effectively eliminate the frost heaving problem.
In one embodiment, at least two first through holes 210 are provided at intervals in the circumferential direction of the waterproof layer 200. So, set up two at least first through-holes 210 on waterproof layer 200 for in follow-up shutoff processing procedure, the shutoff thick liquid can be more smooth and easy in the first clearance 300 of inflow, also make the shutoff thick liquid in the first clearance 300 more even, avoid appearing the inhomogeneous problem of shutoff, guarantee can effectually eliminate first clearance 300. Specifically, at least two first through holes 210 can be uniformly formed in the circumferential direction of the waterproof layer 200, the plugging slurry can be uniformly distributed in the first gap 300 due to the uniform distribution of the first through holes 210, and the plugging effect is good. Preferably, one first through hole 210 is formed at an interval of 2m to 5 m.
In one embodiment, the supporting structure of the underground excavated tunnel further includes a first pressure detecting element (not shown) disposed in the first gap 300, and the first pressure detecting element is electrically connected to the first grouting element. So, utilize first slip casting component to carry out corresponding detection to atmospheric pressure or hydraulic pressure force in first clearance 300 through the work progress of first through-hole 210 injected shutoff thick liquid in to first clearance 300, again with the pressure feedback that detects to first slip casting component, thereby can adjust the slip casting pressure of first slip casting component in real time according to the pressure in first clearance 300, avoid because of the slip casting pressure undersize can't be smooth and easy inject the shutoff thick liquid into first clearance 300 in, also can avoid causing the damage to waterproof layer 200 or primary lining supporting layer 100 because of slip casting pressure is too big.
As shown in fig. 2, in one embodiment, the first grouting member includes a first grouting pipe 410 for being inserted into the first gap 300 after passing through the first through hole 210, and a first pressurizer (not shown) for injecting the plugging slurry into the first grouting pipe 410 after pressurizing the plugging slurry. So, utilize first presser to pressurize the back to the shutoff thick liquid for in the first clearance 300 of the injection that the shutoff thick liquid can be smooth and easy, guarantee that the shutoff thick liquid can be abundant be full of first clearance 300, effectually eliminate first clearance 300, guarantee the antiseep effect. Wherein, the plugging slurry can be formed by a mixture of mortar, water glass and the like.
As shown in fig. 1 and 2, in an embodiment, the supporting structure of the underground excavated tunnel further includes a second supporting layer 500 and a second grouting member, the second supporting layer 500 is attached to an inner wall of the waterproof layer 200, the second supporting layer 500 and the waterproof layer 200 are enclosed to form a second gap 600, the second supporting layer 500 is provided with a second through hole 510 for communicating with the second gap 600, and the second grouting member is used for penetrating the second through hole 510 and injecting a plugging grout into the second gap 600. The two-lining construction is carried out on one side, facing the inner wall of the undercut tunnel, of the waterproof layer 200, so that the two-lining supporting layer 500 is formed, the undercut tunnel is further supported by the two-lining supporting layer 500, the two-lining supporting layer 500 and the primary lining supporting layer 100 are matched to form a supporting structure, the supporting performance is further enhanced, and the undercut tunnel can be further prevented from deforming or collapsing in the construction process. Meanwhile, a second gap 600 may be left between the waterproof layer 200 and the second supporting layer 500 due to the influence of construction errors or installation errors. A second through hole 510 communicating with the second gap 600 is formed in the second liner support layer 500 by drilling or the like, so as to facilitate a subsequent corresponding plugging process for the second gap 600. Utilize the second slip casting component to pour into the second clearance 600 with the shutoff thick liquid in to eliminate second clearance 600, and then can further avoid appearing the problem of moisture seepage, guarantee construction safety.
Specifically, reinforced concrete can be poured around the waterproof layer 200 towards one side of the inside of the undercut tunnel, and a two-lining supporting layer 500 is formed after the reinforced concrete structure is solidified, so that the inner wall of the undercut tunnel can be supported more stably, the undercut tunnel is prevented from deforming or collapsing in the construction process, and the construction safety is ensured. In order to ensure smooth and effective implementation of the second-lining construction, the sidewall of the waterproof layer 200 may be pretreated in advance, for example, the sidewall of the waterproof layer 200 is subjected to leveling treatment, so that the subsequent second-lining supporting layer 500 can be tightly attached to the sidewall of the waterproof layer 200, and the supporting performance is good.
As shown in fig. 2, in one embodiment, the second grouting member includes a second grouting pipe 710 for being inserted into the second gap 600 after passing through the second through hole 510, and a second pressurizer (not shown) for injecting the plugging slurry into the second grouting pipe 710 after pressurizing the plugging slurry. So, utilize the second presser to pressurize the back to the shutoff thick liquid for in the injection second clearance 600 that the shutoff thick liquid can be smooth and easy, guarantee that the shutoff thick liquid can be abundant be full of second clearance 600, effectually eliminate second clearance 600, the antiseep is effectual.
Further, the supporting structure of the underground excavated tunnel further includes a second pressure detecting element (not shown), the second pressure detecting element is disposed in the second gap 600, and the second pressure detecting element is electrically connected to the second grouting element. Therefore, the air pressure or the hydraulic pressure in the second gap 600 is correspondingly detected by the second pressure detection element, and the detected pressure is fed back to the second grouting element, so that the grouting pressure of the second grouting element can be adjusted in real time according to the pressure in the second gap 600, the situation that plugging slurry cannot be smoothly injected into the second gap 600 due to the fact that the grouting pressure is too small is avoided, and damage to the waterproof layer 200 or the two lining support layers 500 due to the fact that the grouting pressure is too large can also be avoided. The second pressure detection element may be an air pressure sensor for detecting air pressure or a hydraulic pressure sensor for detecting hydraulic pressure, and may be provided on an inner wall of the second gap 600. The pressure detected by the second pressure element can be fed back to the second pressurizer, so that the pressurizing pressure of the second pressurizer can be flexibly controlled and adjusted.
As shown in fig. 2, in one embodiment, the second through hole 510 is disposed corresponding to the first through hole 210, the second grouting pipe 710 extends into the second gap 600, and the first grouting pipe 410 is sleeved in the second grouting pipe 710 and extends into the first gap 300. Therefore, the second grouting pipe 710 is inserted into the second through hole 510 until the second grouting pipe 710 extends into the second gap 600, so that the outer wall of the second grouting pipe 710 and the inner wall of the second through hole 510 have sufficient contact area, the sealing performance is good, and the blocking slurry is prevented from overflowing from the second gap 600; the first grouting pipe 410 is inserted into the second grouting pipe 710 until the first grouting pipe 410 extends into the first gap 300, so that the outer wall of the first grouting pipe 410 and the inner wall of the first through hole 210 have enough contact area, the sealing performance is good, and the blocking slurry is prevented from overflowing from the first gap 300. Meanwhile, the first grouting pipe 410 and the second grouting pipe 710 are nested, and only drilling is needed on the two lining support layers 500 until the waterproof layer 200 is drilled through, so that the first through hole 210 and the second through hole 510 can be formed, and the drilling process can be simplified. Meanwhile, the first and second injection pipes 410 and 710 may share one pressurizer.
As shown in fig. 2, further, the supporting structure of the underground excavated tunnel further includes a switching valve 800, and the switching valve 800 is used for controlling the connection and disconnection of the first grouting pipe 410 and the second grouting pipe 710. Thus, the switching valve 800 can flexibly switch the on/off of the first grouting pipe 410 and the on/off of the second grouting pipe 710. For example, when the first grouting pipe 410 is turned on, the second grouting pipe 710 is turned off, and when the second grouting pipe 710 is turned on, the first grouting pipe 410 is turned off; thereby can avoid the two to produce the interference, the slip casting that carries on that can be accurate is handled, guarantees the homogeneity that the shutoff thick liquid distributes in first clearance 300 and second clearance 600, and antiseep effect is good. The switching valve 800 may be a solenoid valve or a pneumatic valve, and only needs to be able to control the switching conduction of the pipeline. The switching of the first grouting pipe 410 and the second grouting pipe 710 by the switching valve 800 can be realized by the conduction and the cutoff of two separate valve bodies.
As shown in fig. 1 and 2, in one embodiment, the supporting structure of the underground excavated tunnel further includes an auxiliary supporting member 900 vertically disposed, the auxiliary supporting member 900 is disposed inside the underground excavated tunnel, one end of the auxiliary supporting member 900 is disposed at the bottom wall of the underground excavated tunnel, and the other end of the supporting member is disposed on the two lining supporting layers 500. So, utilize auxiliary stay 900 to further support the undercut tunnel, strengthened the support performance to the undercut tunnel, guarantee construction safety. The auxiliary support 900 may be an element capable of supporting the two supporting layers 500, such as a supporting steel frame or a reinforced concrete supporting column. The auxiliary supporting member 900 may be fixed on the bottom wall of the undercut tunnel and the two supporting layers 500 by riveting or welding.
The support structure can also be applied to defect treatment of gaps between enclosing structures such as underground station construction, structural work well construction and underground passage and main structures, and particularly has a good effect of eliminating frost heaving diseases of tunnels, underground passages, underground stations and underground structural work wells in alpine regions.
In one embodiment, an underground tunnel is further provided, and the supporting structure of any one of the above embodiments is arranged in the underground tunnel.
The undercut tunnel of the embodiment is characterized in that after excavation of the undercut tunnel is completed, the inner wall of the undercut tunnel is attached to perform primary lining construction, so that the primary lining supporting layer 100 capable of preliminarily supporting the inner wall of the undercut tunnel is formed, and the undercut tunnel is preliminarily guaranteed not to be easily deformed or collapsed. The corresponding waterproof layer 200 is arranged on the inner wall of the primary lining supporting layer 100 facing the underground excavated tunnel, so that water is prevented from permeating into the subsequent supporting layer, the supporting structure can stably and reliably exert the supporting performance, and the corrosion caused by water is avoided. Meanwhile, a first gap 300 may be left between the waterproof layer 200 and the primary backing support layer 100 due to the influence of construction errors or installation errors. The first through hole 210 communicated with the first gap 300 is formed on the waterproof layer 200 by drilling or the like, so that the first gap 300 can be conveniently and correspondingly sealed and treated subsequently. Utilize first slip casting component to pour into the first clearance 300 with the shutoff thick liquid in to can eliminate first clearance 300, avoid appearing the problem of moisture seepage, guarantee construction safety, can also eliminate hidden danger such as subside, cavity and frost heaving, especially to high and cold area, eliminate the back to first clearance 300, can effectively eliminate the frost heaving problem.
In one embodiment, there is also provided a construction method of a supporting structure of an underground excavated tunnel, including the steps of:
s100, primary lining construction is carried out on the underground excavated tunnel, and a primary lining supporting layer 100 is formed. So, the inner wall in laminating undercut tunnel carries out the construction of just lining to form and to carry out the first lining supporting layer 100 that tentatively supports to the inner wall in undercut tunnel, tentatively guarantee that undercut tunnel can not take place to warp easily or collapse.
Specifically, reinforced concrete can be poured around the inner wall of the underground excavated tunnel, and the primary lining supporting layer 100 is formed after the reinforced concrete structure is solidified, so that the inner wall of the underground excavated tunnel can be stably supported, the underground excavated tunnel is prevented from deforming or collapsing in the construction process, and the construction safety is ensured.
In order to ensure the smooth and effective proceeding of the primary lining construction, the inner wall of the undercut tunnel can be pretreated in advance, for example, the inner wall of the undercut tunnel is subjected to leveling treatment or waterproof treatment, so that the subsequent primary lining supporting layer 100 can be tightly attached to the inner wall of the undercut tunnel, the supporting performance is good, and the influence of subsequent water penetrating into the primary lining supporting layer 100 on the supporting performance can be avoided.
And S200, arranging a waterproof layer 200 on the inner wall of the primary lining support layer 100, wherein a first gap 300 is formed between the waterproof layer 200 and the primary lining support layer 100. Thus, the corresponding waterproof layer 200 is arranged on the inner wall of the primary lining supporting layer 100 facing the underground excavated tunnel, water is prevented from permeating into the subsequent supporting layer, the supporting structure can stably and reliably exert the supporting performance, and the corrosion caused by moisture is avoided. Meanwhile, a first gap 300 may be left between the waterproof layer 200 and the primary backing support layer 100 due to the influence of construction errors or installation errors.
In one embodiment, the waterproof layer 200 is a waterproof board and is fixed on the inner wall of the primary lining support layer 100 facing the underground tunnel by riveting, anchoring or concrete setting, so as to ensure that the waterproof layer 200 does not fall off and can stably exert the waterproof protection function. Of course, in other embodiments, the waterproof layer 200 may also be a filling layer capable of preventing water, and only needs to have a waterproof function.
S300, providing a first through hole 210 on the waterproof layer 200, so that the first through hole 210 is communicated with the first gap 300. So, form the first through-hole 210 that communicates with first clearance 300 through modes such as drilling, amalgamation (reserve corresponding hole on two waterproof boards, follow-up two waterproof board concatenations make two hole intercommunications form first through-hole 210) on waterproof layer 200, be convenient for follow-up carry out corresponding shutoff to first clearance 300 and handle.
Further, the step of providing the first through hole 210 on the waterproof layer 200 to communicate the first through hole 210 with the first gap 300 includes: and S310, at least two first through holes 210 are formed in the waterproof layer 200 at intervals. So, set up two at least first through-holes 210 on waterproof layer 200 for in follow-up shutoff processing procedure, the shutoff thick liquid can be more smooth and easy in the first clearance 300 of inflow, also make the shutoff thick liquid in the first clearance 300 more even, avoid appearing the inhomogeneous problem of shutoff, guarantee can effectually eliminate first clearance 300.
Specifically, at least two first through holes 210 can be uniformly formed in the circumferential direction of the waterproof layer 200, the plugging slurry can be uniformly distributed in the first gap 300 due to the uniform distribution of the first through holes 210, and the plugging effect is good.
S400, injecting plugging slurry into the first gap 300 through the first through hole 210 by using the first grouting element. So, utilize first slip casting component to pour into the first clearance 300 with the shutoff thick liquid in to can eliminate first clearance 300, avoid appearing the problem of moisture seepage, guarantee construction safety, can also eliminate hidden danger such as subside, cavity and frost heaving, especially to high and cold area, eliminate the back to first clearance 300, can effectively eliminate the frost heaving problem.
Specifically, the first grouting member includes a first grouting pipe 410 for being inserted into the first gap 300 after passing through the first through hole 210, and a first pressurizer for injecting the plugging slurry into the first grouting pipe 410 after pressurizing the plugging slurry. So, utilize first presser to pressurize the back to the shutoff thick liquid for in the first clearance 300 of the injection that the shutoff thick liquid can be smooth and easy, guarantee that the shutoff thick liquid can be abundant be full of first clearance 300, effectually eliminate first clearance 300. Wherein, the plugging slurry can be formed by a mixture of mortar, water glass and the like.
In one embodiment, the step of injecting the plugging paste into the first gap 300 through the first through hole 210 by using the first grouting member includes: and S410, detecting a first pressure in the first gap 300 and adjusting the grouting pressure of the first grouting element according to the first pressure. So, utilize first pressure measurement component to carry out corresponding detection to atmospheric pressure or hydraulic pressure force in first clearance 300, again with the pressure feedback that detects to first slip casting component to can adjust the slip casting pressure of first slip casting component in real time according to the pressure in first clearance 300, avoid because of the slip casting pressure undersize can't smooth and easy not pour into the first clearance 300 with the shutoff thick liquid into, also can avoid causing the damage to waterproof layer 200 or primary lining supporting layer 100 because of slip casting pressure is too big. The first pressure detection element may be an air pressure sensor for detecting air pressure or a hydraulic pressure sensor for detecting hydraulic pressure, and may be provided on an inner wall of the first gap 300. The pressure detected by the first pressure element can be fed back to the first pressurizer, so that the pressurizing pressure of the first pressurizer can be flexibly controlled and adjusted. The first pressure detection element feeds the detected pressure signal back to the first grouting element, and the first pressure detection element and the first grouting element can be electrically connected, for example, connected through a data line or wirelessly transmitted through bluetooth.
In one embodiment, after the step of providing the first through hole 210 on the waterproof layer 200 and communicating the first through hole 210 with the first gap 300, the method further includes:
and S510, carrying out secondary lining construction on the underground excavated tunnel to form a secondary lining support layer 500, wherein the waterproof layer 200 is arranged between the secondary lining support layer 500 and the primary lining support layer 100, and a second gap 600 is formed between the secondary lining support layer 500 and the waterproof layer 200. Thus, the second lining construction is performed on one side of the waterproof layer 200 facing the inside of the undercut tunnel, so that the second lining supporting layer 500 is formed, the undercut tunnel is further supported by the second lining supporting layer 500, the second lining supporting layer 500 and the primary lining supporting layer 100 are matched to form a supporting structure, the supporting performance is further enhanced, and the undercut tunnel can be further prevented from being deformed or collapsed in the construction process. Meanwhile, a second gap 600 may be left between the waterproof layer 200 and the second supporting layer 500 due to the influence of construction errors or installation errors.
Specifically, reinforced concrete can be poured around the waterproof layer 200 towards one side of the inside of the undercut tunnel, and a two-lining supporting layer 500 is formed after the reinforced concrete structure is solidified, so that the inner wall of the undercut tunnel can be supported more stably, the undercut tunnel is prevented from deforming or collapsing in the construction process, and the construction safety is ensured.
In order to ensure smooth and effective implementation of the second-lining construction, the sidewall of the waterproof layer 200 may be pretreated in advance, for example, the sidewall of the waterproof layer 200 is subjected to leveling treatment, so that the subsequent second-lining supporting layer 500 can be tightly attached to the sidewall of the waterproof layer 200, and the supporting performance is good.
S520, forming a second through hole 510 on the second supporting layer 500, so that the second through hole 510 is communicated with the second gap 600. In this way, the second through holes 510 communicating with the second gaps 600 are formed on the second protective liner layer 500 by drilling or the like, so as to facilitate the subsequent corresponding plugging treatment of the second gaps 600.
And S530, injecting plugging slurry into the second gap 600 through the second through hole 510 by using a second grouting element. So, utilize the second slip casting component to pour into the shutoff thick liquid into in the second clearance 600 to eliminate second clearance 600, can further avoid appearing the problem of moisture seepage, guarantee construction safety.
Specifically, the second grouting member includes a second grouting pipe 710 for being inserted into the second gap 600 after passing through the second through hole 510, and a second pressurizer for injecting plugging slurry into the second grouting pipe 710 after pressurizing the plugging slurry. So, utilize the second presser to pressurize the back to the shutoff thick liquid for in the injection second clearance 600 that the shutoff thick liquid can be smooth and easy, guarantee that the shutoff thick liquid can be abundant be full of second clearance 600, effectually eliminate second clearance 600.
In one embodiment, the step of injecting the plugging paste into the second gap 600 through the second through hole 510 by using the second grouting member further includes: and S531, detecting a second pressure in the second gap 600 and adjusting the grouting pressure of the second grouting element according to the second pressure. Therefore, the air pressure or the hydraulic pressure in the second gap 600 is correspondingly detected by the second pressure detection element, and the detected pressure is fed back to the second grouting element, so that the grouting pressure of the second grouting element can be adjusted in real time according to the pressure in the second gap 600, the situation that plugging slurry cannot be smoothly injected into the second gap 600 due to the fact that the grouting pressure is too small is avoided, and damage to the waterproof layer 200 or the two lining support layers 500 due to the fact that the grouting pressure is too large can also be avoided. The second pressure detection element may be an air pressure sensor for detecting air pressure or a hydraulic pressure sensor for detecting hydraulic pressure, and may be provided on an inner wall of the second gap 600. The pressure detected by the second pressure element can be fed back to the second pressurizer, so that the pressurizing pressure of the second pressurizer can be flexibly controlled and adjusted. The second pressure detection element feeds the detected pressure signal back to the second grouting element, and the detected pressure signal can be electrically connected with the second grouting element through the second pressure detection element, for example, through data line connection or bluetooth wireless transmission.
It should be noted that, after the waterproof layer 200 is arranged, the plugging slurry may be injected into the first gap 300 to eliminate the first gap 300, and after the second lining support layer 500 is arranged, the plugging slurry may be injected into the second gap 600 to eliminate the second gap 600; after the second supporting layer 500 is completely disposed, plugging slurry may be injected into the first gap 300 and the second gap 600 to eliminate the first gap 300 and the second gap 600. The primary lining construction refers to primary lining of the underground tunnel, and a supporting structure formed by primary lining is called a primary lining supporting layer 100; the second lining construction refers to secondary lining of the underground tunnel, and the supporting structure formed by the secondary lining is called a second lining supporting layer 500.
The construction method of the support structure of the underground excavated tunnel of the embodiment at least has the following advantages: 1. the first gap 300 between the primary lining supporting layer 100 and the waterproof layer 200 can be effectively eliminated, the primary lining supporting layer 100 can stably support the underground excavated tunnel, the problem of moisture leakage can be avoided, and the construction safety is ensured; 2. the second gap 600 between the second lining supporting layer 500 and the waterproof layer 200 can be effectively eliminated, the second lining supporting layer 500 can stably support the underground excavated tunnel, the problem of water leakage can be further avoided, and the construction safety is ensured; 3. the first gap 300 and the second gap 600 can be smoothly plugged, and the problem of overlarge or undersize grouting pressure is avoided; 4. the primary lining support layer 100, the waterproof layer 200 and the secondary lining support layer 500 can form a stable support structure, have good support performance, ensure the construction safety, and also can eliminate hidden dangers such as water seepage, settlement, cavities, frost heaving and the like.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples represent only a few embodiments of the present invention, which are described in detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a supporting construction in undercut tunnel which characterized in that includes:
the primary lining support layer is arranged by being attached to the inner wall of the underground excavated tunnel;
the waterproof layer is arranged opposite to the primary lining support layer, a first gap is formed by the waterproof layer and the primary lining support layer in an enclosing mode, and the waterproof layer is provided with a first through hole used for being communicated with the first gap; and
and the first grouting element is used for penetrating through the first through hole and injecting plugging slurry into the first gap.
2. The support structure of an underground excavated tunnel according to claim 1, wherein at least two of the first through holes are provided at intervals in a circumferential direction of the waterproof layer.
3. The support structure of an underground excavated tunnel according to claim 1, further comprising a first pressure detection element disposed in the first gap, the first pressure detection element being electrically connected to the first grouting element.
4. The support structure of an underground excavated tunnel according to any one of claims 1 to 3, wherein the first grouting member includes a first grouting pipe for being inserted into the first gap after passing through the first through hole, and a first pressurizer for pressurizing the plugging slurry and injecting the plugging slurry into the first grouting pipe.
5. The support structure of the underground excavated tunnel according to claim 4, further comprising a second lining support layer and a second grouting member, wherein the second lining support layer is attached to the inner wall of the waterproof layer, a second gap is defined between the second lining support layer and the waterproof layer, the second lining support layer is provided with a second through hole for communicating with the second gap, and the second grouting member is used for penetrating the second through hole and injecting plugging slurry into the second gap.
6. The support structure of an underground excavated tunnel according to claim 5, further comprising a second pressure detection element disposed in the second gap, the second pressure detection element being electrically connected to the second grouting element.
7. The support structure of an undercut tunnel according to claim 5, wherein the second grouting member includes a second grouting pipe for being inserted into the second gap after passing through the second through hole, and a second pressurizer for pressurizing and injecting plugging slurry into the second grouting pipe.
8. The support structure of an underground excavated tunnel according to claim 7, wherein the second through hole is provided corresponding to the first through hole, the second grouting pipe extends into the second gap, the first grouting pipe is sleeved in the second grouting pipe and extends into the first gap, and the support structure further comprises a switching valve for controlling the connection and the disconnection of the first grouting pipe and the second grouting pipe.
9. The support structure of an undercut tunnel according to claim 5, further comprising vertically arranged auxiliary support members, the auxiliary support members being disposed inside the undercut tunnel, one end of the auxiliary support members being disposed at a bottom wall of the undercut tunnel, and the other end of the support members being disposed at the two back-up supporting layers.
10. An underground tunnel, characterized in that the interior of the underground tunnel is provided with a supporting structure as claimed in any one of claims 1 to 9.
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| CN201921515684.3U CN210768836U (en) | 2019-09-11 | 2019-09-11 | Underground excavation tunnel and supporting construction thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486057A (en) * | 2019-09-11 | 2019-11-22 | 中铁建华南建设有限公司 | The supporting construction of bored tunnel and the construction method of supporting construction |
| CN112324462A (en) * | 2020-10-21 | 2021-02-05 | 中铁十六局集团路桥工程有限公司 | Tunnel secondary lining large-area void structure and construction method |
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2019
- 2019-09-11 CN CN201921515684.3U patent/CN210768836U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486057A (en) * | 2019-09-11 | 2019-11-22 | 中铁建华南建设有限公司 | The supporting construction of bored tunnel and the construction method of supporting construction |
| CN112324462A (en) * | 2020-10-21 | 2021-02-05 | 中铁十六局集团路桥工程有限公司 | Tunnel secondary lining large-area void structure and construction method |
| CN112324462B (en) * | 2020-10-21 | 2022-06-28 | 中铁十六局集团路桥工程有限公司 | Tunnel secondary lining large-area void structure and construction method |
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