CN112065406A - Existing tunnel reinforcing anti-floating structure and construction method - Google Patents
Existing tunnel reinforcing anti-floating structure and construction method Download PDFInfo
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- CN112065406A CN112065406A CN202011140229.7A CN202011140229A CN112065406A CN 112065406 A CN112065406 A CN 112065406A CN 202011140229 A CN202011140229 A CN 202011140229A CN 112065406 A CN112065406 A CN 112065406A
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- 238000010276 construction Methods 0.000 title claims abstract description 34
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 194
- 239000010959 steel Substances 0.000 claims abstract description 194
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 239000002689 soil Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- General Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an existing tunnel reinforcing anti-floating structure, which comprises an existing tunnel and anti-floating piles arranged on two sides of the existing tunnel, wherein a pipe curtain is arranged above the existing tunnel, the lower end of the pipe curtain is fixedly connected with the anti-floating piles, and concrete layers are poured in the pipe curtain and at the joint of the pipe curtain and the anti-floating piles; the pipe curtain includes a plurality of pipe curtain steel pipes that are parallel to each other, and is adjacent through connecting steel pipe fixed connection between the pipe curtain steel pipe, this structural system is applicable to the engineering construction of wearing existing subway tunnel on, and especially when upper portion engineering adopts open cut method construction can arouse great uninstallation, can prevent the uplift and the deformation of existing subway effectively, reduces the disturbance to stratum around the existing subway.
Description
Technical Field
The invention relates to the field of construction of tunnels and underground structures with existing tunnels passing through the top, in particular to an existing tunnel reinforcing anti-floating structure and a construction method.
Background
With the rapid development of urban underground space development and the improvement of rail transit networking, the conflict between the established subway tunnel and the newly-built underground engineering is increasingly prominent. The project of excavation of foundation pits and new construction of tunnels above the operation subway tunnel is continuously appeared, when underground engineering such as the new construction of foundation pits and tunnels passes through the tunnel from the upper part, on one hand, the secondary disturbance is carried out on soil bodies around the existing tunnel, on the other hand, the existing tunnel has the functions of bearing and dispersing the upper soil pressure due to certain rigidity, so that the deformation of the existing tunnel is greatly changed, and new problems are brought to the operation, safety and management of the existing operation subway. Therefore, how to reasonably control the deformation of the existing tunnel in the process of passing the existing tunnel through underground engineering such as newly-built foundation pits, tunnels and the like has very important theoretical research and practical significance.
The method has two main aspects of controlling the deformation of the existing tunnel in the process of penetrating the existing tunnel on underground engineering such as newly-built foundation pits, tunnels and the like, namely reinforcing the surrounding stratum of the existing tunnel and reducing the upper unloading. However, as the engineering property is complicated, some specific engineering can not effectively reduce the upper unloading, so that the method for reinforcing the stratum around the existing tunnel is a practical and effective method for controlling the deformation of the existing tunnel. The most common method for reinforcing the stratum around the existing tunnel is to reinforce the stratum around the existing tunnel by grouting so as to reduce the floating amount of the existing subway tunnel. However, for some projects of operating subways by passing on a near-order, in order to ensure the operation safety of the subways, the general stratum reinforcing mode cannot effectively prevent the operating subways from floating upwards, so that the normal operation is influenced.
Disclosure of Invention
The invention aims to provide an existing tunnel reinforcing anti-floating structure and a construction method, and aims to solve the problems in the background art, the invention provides a 'pipe curtain + anti-floating pile + steel pipe concrete' door type structure system suitable for preventing an operation subway from rising, the floating force of the existing subway tunnel caused by upper unloading is transmitted to bedrocks below the anti-floating pile through the pipe curtain and the steel pipe concrete from the angle analysis of the floating force of the subway, the disturbance to the stratum around the subway is reduced, and the safety of the existing tunnel can be greatly improved.
In order to achieve the purpose, the invention provides the following technical scheme:
an existing tunnel reinforcing anti-floating structure comprises an existing tunnel and anti-floating piles arranged on two sides of the existing tunnel, wherein a pipe curtain is arranged above the existing tunnel, the lower end of the pipe curtain is fixedly connected with the anti-floating piles, and concrete layers are poured in the pipe curtain and at the connection part of the pipe curtain and the anti-floating piles;
the pipe curtain comprises a plurality of pipe curtain steel pipes which are arranged in parallel, and the pipe curtain steel pipes are adjacent to each other and fixedly connected through connecting steel pipes.
As a further scheme of the invention: be equipped with uplift pile connecting reinforcement in the uplift pile, be equipped with pipe curtain connecting reinforcement in the pipe curtain steel pipe, uplift pile connecting reinforcement, pipe curtain connecting reinforcement with uplift pile connecting reinforcement fixed connection.
As a further scheme of the invention: the pipe curtain steel pipe with the uplift pile junction has seted up the connecting hole, the uplift pile upper end with pipe curtain steel pipe junction is equipped with the uplift pile head, the uplift pile head with connecting hole fixed connection.
As a further scheme of the invention: the pipe curtain steel pipe both sides are equipped with and are used for holding the through-hole of connecting the steel pipe, the connecting steel pipe passes through the through-hole runs through the pipe curtain steel pipe, links to each other connecting steel pipe fixed connection.
As a further scheme of the invention: concrete is poured in the pipe curtain steel pipe, and concrete is poured in the connecting steel pipe.
An existing tunnel reinforcing anti-floating construction method comprises the following steps:
step 1: driving uplift piles from the ground to two sides of the existing tunnel;
step 2: jacking a pipe curtain above the uplift pile, jacking pipe curtain steel pipes symmetrically from the middle of a construction area to two sides in sequence, and installing connecting steel pipes while jacking the pipe curtain steel pipes tightly;
and step 3: after the jacking of the pipe curtain steel pipes is finished, fixedly connecting the adjacent connecting steel pipes;
and 4, step 4: the pipe curtain steel pipe is fixedly connected with the uplift pile, and then concrete is poured into the pipe curtain and the joint of the pipe curtain and the uplift pile, so that the pipe curtain, the uplift pile and the connecting steel pipe form a concrete anti-floating structure system.
As a further scheme of the invention: and (3) the uplift pile reaches a bedrock below the existing tunnel, the diameter of the uplift pile is 1.2m, and after the uplift pile reaches the age, the step 2 is implemented.
As a further scheme of the invention: the pipe curtain includes bottom pipe curtain and both sides pipe curtain, step 2 includes following step:
step 2.1, jacking a bottom pipe curtain steel pipe, firstly, jacking the pipe curtain steel pipe in the bottom pipe curtain symmetrically from the middle of a construction area to two sides in sequence during construction of the bottom pipe curtain steel pipe, when encountering an uplift pile in the process of jacking the pipe curtain steel pipe, dismantling the uplift pile in an operation area through mechanical wall breaking, simultaneously reserving reinforcing steel bars in the uplift pile below the pipe curtain, cutting the bottom of the pipe curtain steel pipe at the part intersected with the uplift pile to form a connecting hole, connecting the uplift pile head of the uplift pile and the pipe curtain steel pipe into a whole through welding, and simultaneously adding pipe curtain connecting reinforcing steel bars in the pipe curtain steel pipe to connect with the uplift pile connecting reinforcing steel bars in the uplift pile;
and 2.2, jacking the pipe curtain steel pipes on the two sides simultaneously, and when the pipe curtain steel pipes on the two sides are constructed, crushing all uplift piles in the pipe curtain areas on the two sides, connecting steel bars of the uplift piles in the uplift piles with the pipe curtain connecting steel bars in the pipe curtain steel pipes, and connecting uplift pile heads with the pipe curtain steel pipes into a whole by welding.
As a further scheme of the invention: when the bottom pipe curtain steel pipe is jacked in, after the jacking of the adjacent pipe curtain steel pipes is completed, the connecting steel pipes penetrate through the through holes on the two sides of the pipe curtain steel pipes, then the through holes on the two sides of the pipe curtain steel pipes are sealed through welding iron sheets, the two adjacent pipe curtain steel pipes are connected, meanwhile, the adjacent connecting steel pipes are connected through welding, a complete hollow connecting steel pipe penetrating through the pipe curtains is formed, concrete is poured into the connecting steel pipe, and a steel pipe concrete structure communicating all the pipe curtain steel pipes at the bottom is formed.
As a further scheme of the invention: the pipe curtain steel pipe diameter is 1.2m, and is adjacent pipe curtain steel pipe interval 1.5m, the pipe curtain steel pipe is along length direction every 3m division diameter 25 cm's through-hole in both sides, and it is 3m to connect the steel pipe diameter to be 20cm long.
Compared with the prior art, the invention has the beneficial effects that:
1. the structure system is suitable for engineering construction of a tunnel penetrating an existing subway, and particularly can effectively prevent the existing subway from bulging and deforming and reduce disturbance to the surrounding stratum of the existing subway when the upper engineering adopts open cut construction to cause large unloading;
2. the uplift pile and the pipe curtain in the structure system are connected through the steel bars and the concrete inside and welded outside, so that the integrity and the stability of the structure are improved, and meanwhile, the pipe curtain at the bottom is connected in a transverse and longitudinal crossed manner through the steel pipe concrete, so that the stress of the pipe curtain can be more effectively transmitted to the uplift pile, and the rigidity and the integrity of the structure are improved;
3. the lateral pipe curtain in the structural system can play a role in construction guiding and preventing construction from invading, and meanwhile, because the uplift pile is a column, and the pipe curtain and a top beam formed by concrete filled steel tubes are combined to form a door-type structure, the upward buoyancy generated by the construction unloading of the upper part of the operation subway can be effectively absorbed and transmitted to the bedrock of the lower part of the subway, so that the disturbance to the periphery of the operation subway tunnel is small;
4. compared with a grouting reinforcement method, the structural system can better reduce the bulge amount of the existing tunnel, ensure the safety of the existing tunnel and prolong the service life of the tunnel.
Drawings
FIG. 1 is a side view of the anti-floating structural system of the present embodiment;
FIG. 2 is a front view of the anti-floating structure system of the present embodiment;
FIG. 3 is a schematic view of the connection between the bottom tube sheet and the uplift pile and the concrete filled steel tube in the embodiment;
FIG. 4 is a schematic view of the connection between the side tube sheet and the uplift pile and the concrete filled steel tube of the present embodiment;
FIG. 5 is a sequence diagram of the construction of the pipe curtain according to the present embodiment;
fig. 6 is a schematic flow chart of the present embodiment.
In the figure: 1-existing tunnel, 2-uplift pile, 3-pipe curtain, 4-pipe curtain steel pipe, 5-pipe curtain connecting steel bar, 6-connecting steel pipe, 7-uplift pile head and 8-uplift pile connecting steel bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in the embodiment of the present invention, an existing tunnel reinforcing anti-floating structure includes an existing tunnel 1 and anti-floating piles 2 disposed at two sides of the existing tunnel 1, a tube curtain 3 is disposed above the existing tunnel 1, a lower end of the tube curtain 3 is fixedly connected to the anti-floating piles 2, anti-floating pile connecting steel bars 8 are disposed in the anti-floating piles 2, tube curtain connecting steel bars 5 are disposed in tube curtain steel tubes 4, the anti-floating pile connecting steel bars 8 are disposed in the tube curtain steel tubes 4, the tube curtain connecting steel bars 5 are fixedly connected to the anti-floating pile connecting steel bars 8, a connecting hole is disposed at a connection position of the tube curtain steel tubes 4 and the anti-floating piles 2, an anti-floating pile head 7 is disposed at a connection position of an upper end of the anti-floating piles 2 and the tube curtain steel tubes 4, the anti-floating pile head 7 is fixedly connected to the connecting hole, the tube curtain 3 includes a plurality of tube curtain steel tubes 4 disposed in parallel to each other, in the embodiment, the tube curtain, through holes for accommodating the connecting steel pipes 6 are formed in the two sides of the pipe curtain steel pipes 4, the connecting steel pipes 6 penetrate through the pipe curtain steel pipes 4 through the through holes, the connecting steel pipes 6 are fixedly connected, concrete is poured into the pipe curtain steel pipes 4, concrete is poured into the connecting steel pipes 6, and concrete layers are poured into the pipe curtains 3 and the joints of the pipe curtains 3 and the uplift piles 2;
an existing tunnel reinforcing anti-floating construction method comprises the following steps:
step 1: driving uplift piles 2 from the ground to two sides of the existing tunnel 1, enabling the diameter of the uplift piles 2 to be 1.2m from the uplift piles 2 to a bedrock below the existing tunnel 1, and implementing the step 2 after the uplift piles 2 reach the age;
step 2: jacking pipe curtain 3 above uplift pile 2, jacking pipe curtain steel pipe 4 from the middle of the construction area to both sides symmetry in proper order, erection joint steel pipe 6 when 4 tops of pipe curtain steel pipe are tight, step 2 includes following steps:
step 2.1, jacking a bottom pipe curtain steel pipe, firstly, jacking the pipe curtain steel pipe 4 in the bottom pipe curtain symmetrically from the middle of a construction area to two sides in sequence during construction of the bottom pipe curtain steel pipe, removing the uplift pile 2 in an operation area through mechanical wall breaking when the uplift pile 2 is encountered in the process of jacking the pipe curtain steel pipe 4, simultaneously retaining the steel bars in the uplift pile 2 below the pipe curtain, cutting the bottom of the pipe curtain steel pipe 4 at the part intersected with the uplift pile 2 to form a connecting hole, connecting the uplift pile head 7 of the uplift pile 2 with the pipe curtain steel pipe 4 into a whole through welding, and simultaneously adding a pipe curtain connecting steel bar 5 in the pipe curtain steel pipe 4 to be connected with the uplift pile connecting steel bar 8 in the uplift pile 2;
step 2.2, jacking the pipe curtain steel pipes on the two sides simultaneously, when the pipe curtain steel pipes on the two sides are constructed, breaking all the uplift piles 2 in the pipe curtain areas on the two sides, connecting the uplift pile connecting steel bars in the uplift piles 2 with the pipe curtain connecting steel bars 5 in the pipe curtain steel pipes 4, and connecting the uplift pile heads 7 with the pipe curtain steel pipes 4 into a whole by welding
And step 3: after the jacking of the pipe curtain steel pipes 4 is finished, fixedly connecting the adjacent connecting steel pipes 6, when the pipe curtain steel pipes at the bottom are jacked, after the jacking of the adjacent pipe curtain steel pipes 4 is finished, penetrating the connecting steel pipes 6 through the through holes at two sides of the pipe curtain steel pipes 4, then sealing the through holes at two sides of the pipe curtain steel pipes 4 by welding iron sheets, further connecting the adjacent pipe curtain steel pipes 4, simultaneously welding the adjacent connecting steel pipes 6 to form a complete hollow connecting steel pipe penetrating through the pipe curtain, and pouring concrete into the connecting steel pipes 6 to form a steel pipe concrete structure communicated with all the pipe curtain steel pipes 6 at the bottom;
and 4, step 4: pipe curtain steel pipe 4 and uplift pile 2 fixed connection, then to in the pipe curtain 3 and the pipe curtain 3 with the junction of uplift pile 2 concreting for pipe curtain 3, uplift pile 2, connecting steel pipe 6 form concrete anti-floating structure system.
Example 1
In the construction of the embodiment, as shown in fig. 1, the uplift pile is driven from the ground to the periphery of the operation subway to the bedrock below the operation subway, the diameter of the uplift pile is 1.2m, and after the uplift pile reaches the age, the construction of the pipe curtain is started.
As shown in FIG. 4, the steel pipe curtains 4 are symmetrically jacked in sequence from the middle of the construction area to two sides according to the sequence shown in FIG. 4, the diameter of the steel pipe curtains is 1.2m, and the distance between the steel pipe curtains is 1.5 m. During the in-process of advancing 1 # to 7 number pipe curtain steel pipe 4 meets uplift pile 2, demolish uplift pile 2 in the operation region through the mechanical broken wall, remain the reinforcing bar in the pipe curtain below uplift pile 2 simultaneously, and cut open the formation connecting hole with the pipe curtain steel pipe 4 bottom of the 2 crossing parts of uplift pile, make uplift pile head 4 and pipe curtain steel pipe 4 of uplift pile 2 link into an integrated entity through the welding, add pipe curtain connecting reinforcement 5 and the uplift pile connecting reinforcement 8 in the uplift pile 2 simultaneously in pipe curtain steel pipe 4 and link to each other.
As shown in fig. 3, adjacent pipe curtain steel pipes 4 are connected through steel pipes, through holes with the diameter of 25cm are formed in two sides of the pipe curtain steel pipes 4 every 3m when the pipe curtain steel pipes 4 are prefabricated in a factory, after the jacking of the adjacent pipe curtain steel pipes 4 is completed, connecting steel pipes 6 with the diameter of 20cm and the length of 3m are inserted into the adjacent pipe curtain steel pipes through reserved through holes in two sides of the pipe curtain steel pipes 4 to be connected, then the through holes in two sides of the pipe curtain steel pipes are closed through welding iron sheets, the connecting steel pipes 6 are connected through welding to finally form a completed hollow steel pipe, the pipe curtain steel pipes 8, 9 and 10 are simultaneously jacked, after all jacking of the connecting steel pipes are completed, concrete is poured into the connected connecting steel pipes 6, and a steel pipe concrete communicated with all pipe curtains at the bottom is formed.
And finally, carrying out connection between the No. 8, 9 and No. 10 pipe curtains and the uplift piles, adding new steel bars into the pipe curtains through reserved steel bars in the uplift piles, simultaneously, completely breaking the uplift piles in the No. 8, 9 and No. 10 pipe curtain regions, connecting the new steel casing into a whole with the pipe curtains through welding, and then carrying out concrete pouring in the pipe curtains and concrete pouring at the joints of the uplift piles, so that the No. 8, 9 and No. 10 pipe curtains are closely connected with side columns, and finally forming a door-type structure system of 'pipe curtains + uplift piles + steel pipe concrete'.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The existing tunnel reinforcing anti-floating structure is characterized by comprising an existing tunnel (1) and anti-floating piles (2) arranged on two sides of the existing tunnel (1), wherein a pipe curtain (3) is arranged above the existing tunnel (1), the lower end of the pipe curtain (3) is fixedly connected with the anti-floating piles (2), and concrete layers are poured in the pipe curtain (3) and at the joint of the pipe curtain (3) and the anti-floating piles (2);
the pipe curtain (3) comprises a plurality of pipe curtain steel pipes (4) which are arranged in parallel, and the pipe curtain steel pipes (4) are adjacent to each other and fixedly connected through connecting steel pipes (6).
2. The existing tunnel reinforcing anti-floating structure according to claim 1, wherein anti-floating pile connecting steel bars (8) are arranged in the anti-floating piles (2), pipe curtain connecting steel bars (5) are arranged in the pipe curtain steel pipes (4), and the pipe curtain connecting steel bars (5) are fixedly connected with the anti-floating pile connecting steel bars (8).
3. The existing tunnel reinforcing anti-floating structure according to claim 1, wherein a connecting hole is formed at the joint of the tube curtain steel tube (4) and the uplift pile (2), an uplift pile head (7) is arranged at the joint of the upper end of the uplift pile (2) and the tube curtain steel tube (4), and the uplift pile head (7) is fixedly connected with the connecting hole.
4. The existing tunnel reinforcing anti-floating structure according to claim 1, wherein through holes for accommodating the connecting steel pipes (6) are formed in two sides of the pipe curtain steel pipes (4), and the connecting steel pipes (6) penetrate through the pipe curtain steel pipes (4) through the through holes and are fixedly connected with the connecting steel pipes (6).
5. The existing tunnel reinforcing anti-floating structure according to claim 1, wherein concrete is poured in the tube curtain steel tubes (4) and concrete is poured in the connecting steel tubes (6).
6. An existing tunnel reinforcing and anti-floating construction method according to any one of claims 1 to 5, characterized by comprising the following steps:
step 1: driving uplift piles (2) from the ground to two sides of the existing tunnel (1);
step 2: jacking a pipe curtain (3) above the uplift pile (2), jacking pipe curtain steel pipes (4) symmetrically from the middle of a construction area to two sides in sequence, and installing connecting steel pipes (6) while jacking the pipe curtain steel pipes (4);
and step 3: after the jacking of the pipe curtain steel pipes (4) is finished, fixedly connecting the adjacent connecting steel pipes (6);
and 4, step 4: the pipe curtain steel pipe (4) is fixedly connected with the uplift pile (2), and then concrete is poured into the pipe curtain (3) and the joint of the pipe curtain (3) and the uplift pile (2), so that the pipe curtain (3), the uplift pile (2) and the connecting steel pipe (6) form a concrete anti-floating structure system.
7. The existing tunnel reinforcing and anti-floating construction method according to claim 6, characterized in that the diameter of the uplift pile (2) is 1.2m from the uplift pile (2) to the bedrock below the existing tunnel (1), and after the uplift pile (2) reaches the age, the step 2 is carried out.
8. The existing tunnel reinforcing and anti-floating construction method according to claim 6, wherein the pipe curtain (3) comprises a bottom pipe curtain and two side pipe curtains, and the step 2 comprises the following steps:
step 2.1, jacking a bottom pipe curtain steel pipe, firstly, jacking the pipe curtain steel pipe (4) in the bottom pipe curtain symmetrically from the middle of a construction area to two sides in sequence during construction of the bottom pipe curtain steel pipe, removing the uplift pile (2) in an operation area through mechanical wall breaking when the uplift pile (2) is encountered in the process of jacking the pipe curtain steel pipe (4), simultaneously reserving steel bars in the uplift pile (2) below the pipe curtain, cutting the bottom of the pipe curtain steel pipe (4) at the part intersected with the uplift pile (2) to form a connecting hole, connecting an uplift pile head (7) of the uplift pile (2) with the pipe curtain steel pipe (4) into a whole through welding, and simultaneously adding a pipe curtain connecting steel bar (5) in the pipe curtain steel pipe (4) to be connected with the uplift pile connecting steel bar (8) in the uplift pile (2);
and 2.2, jacking the pipe curtain steel pipes on the two sides simultaneously, when the pipe curtain steel pipes on the two sides are constructed, crushing all uplift piles (2) in pipe curtain areas on the two sides, connecting uplift pile connecting steel bars in the uplift piles (2) with pipe curtain connecting steel bars (5) in the pipe curtain steel pipes (4), and connecting uplift pile heads (7) with the pipe curtain steel pipes (4) into a whole through welding.
9. The existing tunnel reinforcing and anti-floating construction method according to claim 8, wherein during the jacking of the bottom tube curtain steel tube, after the jacking of the adjacent tube curtain steel tube (4) is completed, the connecting steel tube (6) is passed through the through holes on both sides of the tube curtain steel tube (4), then the through holes on both sides of the tube curtain steel tube (4) are closed by welding iron sheets, so as to connect the adjacent tube curtain steel tubes (4), meanwhile, the adjacent connecting steel tubes (6) are connected by welding, a complete hollow connecting steel tube penetrating through the tube curtain is formed, and concrete is poured into the connecting steel tube (6), so as to form a steel tube concrete structure communicating all the tube curtain steel tubes (6) at the bottom.
10. The existing tunnel reinforcing and anti-floating construction method according to claim 6, wherein the diameter of the pipe curtain steel pipe (4) is 1.2m, the distance between adjacent pipe curtain steel pipes (4) is 1.5m, through holes with the diameter of 25cm are formed in the two sides of each pipe curtain steel pipe (4) every 3m along the length direction, and the length of the connecting steel pipe (6) is 20cm and 3 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011140229.7A CN112065406A (en) | 2020-10-22 | 2020-10-22 | Existing tunnel reinforcing anti-floating structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011140229.7A CN112065406A (en) | 2020-10-22 | 2020-10-22 | Existing tunnel reinforcing anti-floating structure and construction method |
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| Publication Number | Publication Date |
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| CN112065406A true CN112065406A (en) | 2020-12-11 |
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| CN202011140229.7A Pending CN112065406A (en) | 2020-10-22 | 2020-10-22 | Existing tunnel reinforcing anti-floating structure and construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113392563A (en) * | 2021-06-29 | 2021-09-14 | 石家庄铁道大学 | Pipe curtain prefabricated structure and design method thereof |
| CN113565525A (en) * | 2021-08-28 | 2021-10-29 | 中铁上海工程局集团有限公司 | Construction protection system and construction method for newly-built shield tunnel super-close ultra-shallow buried upper-span existing tunnel |
| CN114352288A (en) * | 2021-12-30 | 2022-04-15 | 南京工大交通科学研究院(滁州)有限公司 | Shield short-distance upward-penetrating existing shield tunnel construction structure and construction method |
| CN117587858A (en) * | 2023-11-29 | 2024-02-23 | 陕西建工集团股份有限公司 | Tunnel deformation control method in loading and unloading process above existing subway tunnel |
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2020
- 2020-10-22 CN CN202011140229.7A patent/CN112065406A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113392563A (en) * | 2021-06-29 | 2021-09-14 | 石家庄铁道大学 | Pipe curtain prefabricated structure and design method thereof |
| CN113392563B (en) * | 2021-06-29 | 2023-04-25 | 石家庄铁道大学 | Pipe curtain pre-building structure and design method thereof |
| CN113565525A (en) * | 2021-08-28 | 2021-10-29 | 中铁上海工程局集团有限公司 | Construction protection system and construction method for newly-built shield tunnel super-close ultra-shallow buried upper-span existing tunnel |
| CN114352288A (en) * | 2021-12-30 | 2022-04-15 | 南京工大交通科学研究院(滁州)有限公司 | Shield short-distance upward-penetrating existing shield tunnel construction structure and construction method |
| CN114352288B (en) * | 2021-12-30 | 2024-04-16 | 南京工大交通科学研究院(滁州)有限公司 | Construction structure and construction method for shield tunneling in short distance |
| CN117587858A (en) * | 2023-11-29 | 2024-02-23 | 陕西建工集团股份有限公司 | Tunnel deformation control method in loading and unloading process above existing subway tunnel |
| CN117587858B (en) * | 2023-11-29 | 2024-04-26 | 陕西建工集团股份有限公司 | Tunnel deformation control method in loading and unloading process above existing subway tunnel |
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