CN112682073A - Water retaining wall structure for blocking tunnel portal in shield well and construction method thereof - Google Patents
Water retaining wall structure for blocking tunnel portal in shield well and construction method thereof Download PDFInfo
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- CN112682073A CN112682073A CN202011638344.7A CN202011638344A CN112682073A CN 112682073 A CN112682073 A CN 112682073A CN 202011638344 A CN202011638344 A CN 202011638344A CN 112682073 A CN112682073 A CN 112682073A
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- bar
- retaining wall
- glue
- hole
- water retaining
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 230000000903 blocking effect Effects 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000003292 glue Substances 0.000 claims description 48
- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- 238000005553 drilling Methods 0.000 claims description 17
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005641 tunneling Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a water retaining wall structure for blocking a tunnel portal in a shield well and a construction method thereof. The water retaining wall structure has the advantages of good sealing performance, high structural strength, low construction process requirement, simplicity and easiness in operation, and is beneficial to saving manpower and material resources and improving the construction efficiency.
Description
Technical Field
The invention relates to the technical field of underwater receiving of shield tunneling machines, in particular to a water retaining wall structure for blocking a tunnel portal in a shield tunneling well and a construction method thereof.
Background
The tunnel construction is usually constructed by a shield method, becomes an important component of the traffic development of various major cities at home and abroad at present, and has the advantages of large transportation volume, high speed, low noise, light pollution and the like. The tunnel portal needs to be plugged in different construction stages, so that safe construction and normal tunneling of the shield can be guaranteed, but the existing portal plugging structure usually has the technical problem of complex construction or poor sealing performance.
Disclosure of Invention
The invention discloses a water retaining wall structure for blocking a tunnel portal in a shield well and a construction method thereof, which solve the technical problem that the tunnel portal blocking structure in the prior art is complex or poor in sealing performance and have the advantages of good sealing performance and simplicity and easiness in construction operation. The adopted technical scheme is as follows:
the utility model provides a shield constructs interior retaining wall structure for portal shutoff of well, the retaining wall is pour by concrete an organic whole and forms, the one end and the portal end face sealing connection of retaining wall, the other end of retaining wall extends to outside the section of jurisdiction of portal department and with tunnel portal shutoff.
On the basis of the technical scheme, reinforcing steel bars are uniformly distributed in the water retaining wall.
A construction method of a water retaining wall for blocking a tunnel portal in a shield well of a tunnel portal in a shield well comprises the following steps:
positioning and marking a plurality of drilling positions for planting bars on the end surface of the hole door and the lining wall surrounding the hole door, wherein if the drilling positions interfere with the stressed steel bars on the lining wall, the drilling positions can be properly adjusted;
after drilling, cleaning dust and moisture in the drill hole;
cutting to prepare reinforcing steel bars for bar planting;
preparing a bar planting adhesive for anchoring, wherein the bar planting adhesive is prepared for use in situ;
after the prepared embedded bar glue part is filled in the drilled hole, one end of the steel bar corresponding to the position of the drilled hole is placed in the drilled hole, and the filling amount of the embedded bar glue in the drilled hole is ensured to ensure that a small amount of the embedded bar glue overflows after the steel bar is placed in the drilled hole;
waiting for the curing of the bar planting glue, and not disturbing the steel bar before the bar planting glue is completely cured;
and bundling the crossed positions of the reinforcing steel bars and the reinforcing steel bars, and pouring concrete on the retaining wall frame body formed by the plurality of reinforcing steel bars after bundling.
On the basis of the technical scheme, the drill hole is temporarily closed after being cleaned, and if waste holes exist, the waste holes are filled with bar planting glue after being cleaned.
On the basis of the technical scheme, the hole depth value of the drilled hole is not less than 15 times of the designed inner diameter value of the drilled hole, and the actual inner diameter value of the drilled hole is slightly larger than the designed inner diameter value of the drilled hole.
On the basis of the technical scheme, the bar planting glue is prepared as being used, the glue preparation amount at each time can be determined according to the speed of bar planting operation of workers, the glue preparation amount at each time is not more than 2kg, and the bar planting glue is prepared to be stirred at the uniform speed along the same direction, so that air is prevented from being mixed in the bar planting glue.
On the basis of the technical scheme, when the reinforcing steel bar is arranged in the drill hole, the reinforcing steel bar is rotationally arranged in the drill hole filled with the embedded bar glue or the reinforcing steel bar is extruded into the drill hole with the embedded bar glue by means of external force.
On the basis of the technical scheme, the bar planting glue adopts A-level glue, and workers need to be equipped with labor protection equipment when contacting the bar planting glue.
On the basis of the technical scheme, the steel bar is subjected to drawing test after the steel bar planting is finished.
Advantageous effects
In the invention, holes are drilled and the steel bars are planted on the end face of the tunnel portal and the lining wall surrounding the tunnel portal to form the steel bar frame of the water retaining wall, and concrete is poured on the steel bar frame of the water retaining wall to form the water retaining wall, wherein the water retaining wall, the end face of the tunnel portal and the lining wall have higher connection strength and better sealing performance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary of the invention, and that other embodiments can be derived from the drawings provided by those skilled in the art without inventive effort.
FIG. 1: the invention relates to a schematic axial section structure diagram of a water retaining wall for blocking a tunnel portal;
FIG. 2: the invention relates to a radial section structure schematic diagram of a water retaining wall for blocking a tunnel portal;
FIG. 3: FIG. 1 is a schematic diagram of a steel bar planting process;
FIG. 4: the schematic diagram of the bar planting in the direction A-A in FIG. 1;
Detailed Description
The invention is further illustrated by the following figures and examples:
reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
A shield structure well 1 as shown in fig. 1 ~ 4 is the following three-layer open cut structure, and shield structure well 1 side wall's envelope 2 adopts the underground continuous wall of 1200mm thick, and the lateral wall of continuous wall still is equipped with interior support + ring frame beam structure 3 of 600mm thickness, and the vertical support that still is equipped with for guaranteeing the normal clear of shield structure construction, need carry out the shutoff to portal 7, adopts breakwater 6 to carry out the shutoff, breakwater 6 is pour by concrete an organic whole and forms, the one end and the portal 7 end face sealing connection of breakwater 6, the other end of breakwater 6 extends to outside the section of jurisdiction 4 of portal 7 department and with tunnel portal 7 shutoff, the equipartition has the reinforcing bar in the breakwater 6.
A construction method of a water retaining wall for blocking a tunnel portal in a shield well of a tunnel portal in a shield well comprises the following steps:
positioning and marking a plurality of drilling positions for planting bars on the end face of the hole door 7 and the lining wall surrounding the hole door 7, wherein if the drilling positions interfere with the stressed steel bars on the lining wall, the drilling positions can be properly adjusted;
drilling adopts the electric hammer pore-forming, should adjust the hole site if meet the reinforcing bar and avoid, the actual internal diameter value of drilling slightly is greater than the design internal diameter value of drilling, the hole depth value of drilling is not less than 15 times of drilling design internal diameter value, and drilling is arranged and the construction should be with not destroying section of jurisdiction 4 and reinforcing bar as the principle, and drilling finishes, and inspection hole depth, aperture blow off downthehole dust with compressed air after qualified, then brush, cotton with the pore wall brush clean, blow off the hole with compressed air once more, should carry out 3 ~ 5 times repeatedly, up to downthehole no dust piece and moisture, seal the drill way temporarily from the right side. If there is waste hole, cleaning and filling with bar-planting glue.
Cutting and preparing the steel bar for bar planting according to the designed length;
the glue is preferably mixed mechanically, and the stirrer may be composed of electric hammer and stirring teeth. The stirring teeth can be made by welding cross-shaped steel bars at the end part of an electric hammer drill bit, and can also be made by manually stirring by using a fine steel bar. When the glue is prepared, a clean container (a plastic or metal basin without oil stain, water and impurities) and a weighing apparatus are mixed according to the mixing proportion, and the mixture is stirred by a stirrer for about 5 to 10 minutes until the two components are uniformly mixed. It is preferable to stir the mixture in the same direction to avoid air bubbles from being formed. The bar-planting adhesive is used in situ, and the amount of the adhesive is not more than 2kg each time;
after the prepared embedded bar glue part is filled in the drilled hole, one end of the steel bar corresponding to the position of the drilled hole is placed in the drilled hole, and the filling amount of the embedded bar glue in the drilled hole is ensured to ensure that a small amount of the embedded bar glue overflows after the steel bar is placed in the drilled hole; when the steel bar is placed in the drill hole, the steel bar is rotationally placed in the drill hole filled with the steel bar planting glue or the steel bar is extruded into the drill hole filled with the steel bar planting glue by means of external force. When the reinforcing bar is squeezed into the drilled hole by hammering with a hand, the reinforcing bar needs to be held by one hand to avoid springback.
Waiting for the curing of the bar planting glue, and not disturbing the steel bar before the bar planting glue is completely cured; the bar planting glue has a curing process, the reinforcing steel bars cannot be disturbed within 12 hours in summer (within 24 hours in winter) after bar planting, and the bar planting glue is replanted if large disturbance exists. It should be noted that the bar-planting glue can be well cured at normal temperature and low temperature, if the curing temperature is about 25 ℃. The design load can be borne within 2 days; if the curing temperature is about 5 ℃, the design load can be borne within 4 days, and the anchoring force continues to increase along with the time.
And bundling the crossed positions of the reinforcing steel bars and the reinforcing steel bars, and pouring concrete on the retaining wall frame body formed by the plurality of reinforcing steel bars after bundling.
The bar-planting adhesive adopts A-grade adhesive, and the adhesive must meet the relevant requirements of the GB50367-2013 standard; the bar planting glue is a non-toxic material after being completely cured, but individual components before being cured have irritation to skin and eyes, and the glue is not easy to remove after being cured, so bar planting operators need to pay attention to proper labor protection, such as safety helmets, work clothes, gloves and the like. After the human body is directly contacted, the result is applied, and after the result is qualified, the human body can be washed clean by clear water, so that workers need to be equipped with labor protection equipment when contacting the bar planting glue.
And randomly performing spot check for drawing test 3-4 days after bar planting, detecting by qualified units, issuing a legal detection report, and performing comprehensive construction after all qualified units are required.
The present invention has been described above by way of example, but the present invention is not limited to the above-described specific embodiments, and any modification or variation made based on the present invention is within the scope of the present invention as claimed.
Claims (9)
1. The utility model provides a shield constructs interior retaining wall structure for portal shutoff of well, its characterized in that, retaining wall (6) are pour by concrete an organic whole and are formed, the one end and the portal (7) terminal surface sealing connection of retaining wall (6), the other end of retaining wall (6) extends to outside section of jurisdiction (4) of portal (7) department and with tunnel portal (7) shutoff.
2. The water retaining wall structure for blocking the tunnel portal in the shield well according to claim 1, wherein reinforcing steel bars are uniformly distributed in the water retaining wall (6).
3. A construction method of a water retaining wall for blocking a tunnel portal in a shield well of a tunnel portal in a shield well is characterized by comprising the following steps:
s1, positioning and marking a plurality of drilling positions for planting bars on the end face of a hole door (7) and a lining wall surrounding the hole door (7), wherein if the drilling positions interfere with stressed steel bars on the lining wall, the drilling positions can be properly adjusted;
s2, cleaning dust and moisture in the drill hole after the drill hole is drilled;
s3, cutting and preparing the steel bar for bar planting;
s4, preparing a bar planting adhesive for anchoring, wherein the bar planting adhesive is prepared for use in situ;
s5, after the prepared bar planting glue is partially filled into the drilled hole, one end of the steel bar corresponding to the position of the drilled hole is placed into the drilled hole, and the filling amount of the bar planting glue in the drilled hole is ensured to ensure that a small amount of the bar planting glue overflows after the steel bar is placed into the drilled hole;
s6, waiting for the curing of the bar planting glue, and not disturbing the steel bar before the bar planting glue is completely cured;
and S7, bundling the crossed positions of the reinforcing steel bars and the reinforcing steel bars, and pouring concrete on the water retaining wall frame body formed by the plurality of reinforcing steel bars after bundling.
4. The construction method of the water retaining wall for blocking the tunnel portal in the shield well according to claim 3, wherein the drilled hole is temporarily closed after being cleaned, and if a waste hole exists, the drilled hole is filled with bar planting glue after the waste hole is cleaned.
5. The construction method of the water retaining wall for blocking the tunnel portal in the shield well according to claim 3, wherein the hole depth value of the drilled hole is not less than 15 times of the designed inner diameter value of the drilled hole, and the actual inner diameter value of the drilled hole is slightly larger than the designed inner diameter value of the drilled hole.
6. The construction method of the water retaining wall for blocking the tunnel portal in the shield well according to claim 3, wherein the bar-planting glue is prepared as it is, the glue preparation amount at each time can be determined according to the speed of bar-planting operation of workers, the glue preparation amount at each time is not more than 2kg, and the bar-planting glue is prepared for stirring and stirred at a uniform speed along the same direction, so that air is prevented from being mixed in the bar-planting glue.
7. The construction method of the water retaining wall for blocking the tunnel portal in the shield well according to claim 3, wherein when the steel bar is placed in the drill hole, the steel bar is placed in the drill hole filled with the steel bar planting glue in a rotating manner or the steel bar is squeezed into the drill hole filled with the steel bar planting glue by means of external force.
8. The construction method of the water retaining wall for blocking the tunnel portal in the shield well according to any one of claims 3 to 7, wherein the bar-planting glue is A-grade glue, and workers should be equipped with labor protection equipment when contacting the bar-planting glue.
9. The construction method of the water retaining wall for blocking the tunnel portal in the shield well according to claim 8, wherein a steel bar is subjected to a drawing test after the steel bar is planted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011638344.7A CN112682073A (en) | 2020-12-31 | 2020-12-31 | Water retaining wall structure for blocking tunnel portal in shield well and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011638344.7A CN112682073A (en) | 2020-12-31 | 2020-12-31 | Water retaining wall structure for blocking tunnel portal in shield well and construction method thereof |
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|---|---|
| CN112682073A true CN112682073A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011638344.7A Pending CN112682073A (en) | 2020-12-31 | 2020-12-31 | Water retaining wall structure for blocking tunnel portal in shield well and construction method thereof |
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| CN (1) | CN112682073A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944480A (en) * | 2021-10-14 | 2022-01-18 | 中国水利水电科学研究院 | Temperature control anti-cracking method for door wall of shield working well |
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| CN109372541A (en) * | 2018-11-27 | 2019-02-22 | 中铁第四勘察设计院集团有限公司 | A kind of portal temporary plugging structure and its construction method suitable for shield tunnel |
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| CN210370662U (en) * | 2019-07-25 | 2020-04-21 | 中铁十二局集团第二工程有限公司 | Temporary blocking device for tunnel portal of shield tunnel |
| KR102126647B1 (en) * | 2020-02-03 | 2020-06-24 | (주)신승이앤씨 | Waterproof structure of non-excavation type tunnel improved shearing force and stiffness according to combination of h-beam support material and method of constructing thereof |
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2020
- 2020-12-31 CN CN202011638344.7A patent/CN112682073A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527214A (en) * | 2013-11-04 | 2014-01-22 | 南京林业大学 | Horizontal freezing and pipe shed combined subway shield tunnel reinforcing tip and method |
| CN203626848U (en) * | 2013-11-04 | 2014-06-04 | 南京林业大学 | Railway shield tunnel end jointly reinforced by horizontal freezing holes and pipe shed |
| CN103924987A (en) * | 2014-04-24 | 2014-07-16 | 中铁十一局集团城市轨道工程有限公司 | SMW pile shielding portal waterproof structure and construction method thereof |
| CN107965335A (en) * | 2017-11-21 | 2018-04-27 | 上海市机械施工集团有限公司 | A kind of shield driving construction method |
| CN108397206A (en) * | 2018-03-08 | 2018-08-14 | 中铁建大桥工程局集团第四工程有限公司 | Arrival method of reseptance under short stabilization zone operating mode in rich water soft soil layer |
| CN109372541A (en) * | 2018-11-27 | 2019-02-22 | 中铁第四勘察设计院集团有限公司 | A kind of portal temporary plugging structure and its construction method suitable for shield tunnel |
| CN210370662U (en) * | 2019-07-25 | 2020-04-21 | 中铁十二局集团第二工程有限公司 | Temporary blocking device for tunnel portal of shield tunnel |
| CN110966017A (en) * | 2019-12-02 | 2020-04-07 | 中铁广州工程局集团有限公司 | Construction method for water-rich stratum shield interval outer wrapping type tunnel portal ring beam |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113944480A (en) * | 2021-10-14 | 2022-01-18 | 中国水利水电科学研究院 | Temperature control anti-cracking method for door wall of shield working well |
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