CN203584437U - First lining structure used for constructing underground engineering and having water-resisting function - Google Patents
First lining structure used for constructing underground engineering and having water-resisting function Download PDFInfo
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- CN203584437U CN203584437U CN201320499386.6U CN201320499386U CN203584437U CN 203584437 U CN203584437 U CN 203584437U CN 201320499386 U CN201320499386 U CN 201320499386U CN 203584437 U CN203584437 U CN 203584437U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 378
- 239000010959 steel Substances 0.000 claims abstract description 378
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000002689 soil Substances 0.000 claims abstract description 54
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims description 92
- 230000000903 blocking effect Effects 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 37
- 239000011440 grout Substances 0.000 claims description 19
- 230000008093 supporting effect Effects 0.000 claims description 18
- 239000002002 slurry Substances 0.000 claims description 7
- 238000005065 mining Methods 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 claims description 4
- 239000012466 permeate Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 20
- 238000001556 precipitation Methods 0.000 description 11
- 238000009412 basement excavation Methods 0.000 description 10
- 238000007569 slipcasting Methods 0.000 description 7
- 239000003673 groundwater Substances 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 241001270131 Agaricus moelleri Species 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
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- 238000005553 drilling Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Abstract
The utility model discloses a first lining structure used for constructing underground engineering and having a water-resisting function, comprising a water-resisting pipe curtain surrounding the periphery of the underground engineering to be constructed and water seal obstructing plane bodies. The water-resisting pipe curtain comprises positioning steel pipes and micro steel pipes, wherein the positioning steel pipes are distributed in the peripheral soil body of the underground engineering to be constructed in an extending direction perpendicular to a vertical shaft, and the micro steel pipes, between two adjacent positioning steel pipes, are inserted into the peripheral soil body of the underground engineering to be constructed in the extending direction perpendicular to a vertical shaft. A positioning steel pipe and a micro steel pipe next to each other, and two adjacent micro steel pipes are in connection through lock ports; each micro steel pipe is filled with seriflux; the water seal obstructing plane bodies are parallelly distributed in the underground space enclosed by the water-resisting pipe curtain, are perpendicular to the positioning steel pipes and have different distances with the vertical shaft. The first lining structure also comprises circular supports along the inside wall of the water-resisting pipe curtain and parallel with the water seal obstructing plane bodies. The first lining structure also possesses better water-resisting effect; the water-resisting pipe curtain possesses stronger rigidity.
Description
Technical Field
The utility model relates to an underground works technical field especially relates to a just line structure for building underground works has water proof function concurrently.
Background
At present, underground street crossing channels, underground traffic tunnels, underground pipeline tunnels, subway stations and other underground projects are increasingly constructed. In the construction of such underground works, open cut methods and underground cut methods are generally used. The open cut method is simple and quick in construction, but has great damage or influence on the surrounding environment, and is only suitable for construction under the condition of shallow embedding depth. The underground excavation method does not carry out whole excavation on the ground of the part of the underground engineering to be built during construction, has small influence on the surrounding environment, and is particularly suitable for the construction of the underground engineering in urban areas.
However, the current burying depth of some underground projects can reach 20-40 meters, even entering underground confined water areas. For example, in the construction planning of the beijing subway, the transfer stations of encrypted subway lines in some urban areas will have three-line or even four-line transfer, and the construction of the subway stations or lines may be buried to be less than 35 meters deep. As the urban underground water protection requirements are more and more strict, the method of pumping underground water to carry out stratum precipitation is not allowed to be implemented when underground engineering is built. Common underground excavation methods such as a hole pile method, a subsection excavation method and the like are not suitable for building underground engineering under the conditions of large buried depth, rich underground water and no permission of stratum precipitation on the premise of creating construction operation conditions by stratum precipitation.
At present, when an underground project is built under the conditions of large buried depth, rich underground water and no permission of stratum precipitation, engineering personnel generally utilize a pipe jacking (or pipe tamping) technology to jack steel pipes (or pipes made of other materials) in the upper half part or the periphery of the underground project to be built, the steel pipes are connected by adopting (partially not adopting) locking ports to form a pipe curtain, soil excavation is carried out in an underground space surrounded by the pipe curtain or under the shed of the pipe curtain, and the underground project is built; this construction method is generally called a tube curtain method. Generally, the pipe-curtain method is based on the premise that stratum precipitation is carried out in advance before construction so as to meet the requirements of construction operation; moreover, the pipe curtain method generally adopts a micro-pipe jacking technology, the diameter of a jacking steel pipe is generally less than 1 meter, and when underground engineering is built, the pipe curtain is reinforced only by grouting in the steel pipe and is weak in the action of bearing the pressure of peripheral water and soil.
An improved pipe curtain method features that the steel pipe with large diameter (2 m) is pushed around the underground engineering to be built, and the steel pipe is cut and welded to form a ring support. However, when the improved pipe curtain method is used for construction in a steel pipe with a large diameter, construction operations such as cutting and welding are often performed on each steel pipe, so that the construction difficulty is high, and the progress is slow; in addition, the improved pipe curtain method is not improved aiming at construction water insulation, so that the water insulation effect of the primary lining structure which is used for constructing underground engineering and has the water insulation function is still poor, and stratum precipitation is still needed. Herein, the primary lining structure with the water-proof function for constructing the underground engineering is referred to as the water-proof structure for short.
In summary, the pipe curtain method or the improved pipe curtain method in the prior art have the problem that the water-blocking effect of the water-blocking structure is not good when the underground engineering is built, so that it is necessary to provide a primary lining structure, i.e. a water-blocking structure, with better water-blocking effect for building the underground engineering and having the water-blocking function, so as to build the underground engineering in a water-free space without formation precipitation.
SUMMERY OF THE UTILITY MODEL
To the defect that above-mentioned prior art exists, the utility model provides a just line structure for building underground works has water proof function concurrently, its whole technology can provide the structure more perfect, the effect is more showing water proof effect.
The utility model provides a just line structure for building underground works has water proof function concurrently, include: a riser curtain and a plurality of water-stop blocking plane bodies surrounding the periphery of the underground project to be built;
the riser curtain comprises: at least two positioning steel pipes and micro steel pipes; the positioning steel pipes are distributed in the peripheral soil body of the underground engineering to be built from the extending direction which is vertical to the shaft well to be built for the underground engineering to be built; the micro steel pipes are arranged between two adjacent positioning steel pipes and are jacked into the peripheral soil body of the underground engineering to be built from the direction vertical to the extending direction of the vertical shaft; the adjacent positioning steel pipes and the micro steel pipes, and the adjacent two micro steel pipes are connected through locking notches; and slurry is injected into each micro steel pipe;
the plurality of water stop blocking plane bodies are parallelly arranged in an underground space enclosed by the marine riser curtains, are vertical to the positioning steel pipes and are different from the vertical shaft in distance; wherein,
each water stop blocking plane body is arranged in a plane, the distance between the plane body and the vertical shaft is equal to the preset distance between the water stop blocking plane body and the vertical shaft, grout is injected into a grouting steel pipe arranged in the plane, and after the grout permeates into soil bodies on the periphery of the grouting steel pipe through the grouting steel pipe, the soil bodies permeating the grout reach the set water blocking strength; after at least two positioning steel pipes are selected as construction steel pipes, a plurality of through holes are drilled in the plane and in each construction steel pipe to the underground space surrounded by the marine riser curtains, and then the through holes are drilled from the construction steel pipes to the underground space surrounded by the marine riser curtains.
Preferably, the length of the locking notch of the positioning steel pipe is the same as that of the positioning steel pipe; the length of the locking notch of the micro steel pipe is the same as that of the micro steel pipe; and the locking notch comprises: a groove-shaped locking notch and a protrusion-shaped locking notch; and
the positioning steel pipe is matched with the convex locking notch/the concave locking notch of the micro steel pipe adjacent to the positioning steel pipe and arranged side by side through the concave locking notch/the convex locking notch of the positioning steel pipe so as to connect and fix the micro steel pipe adjacent to the positioning steel pipe; and
the micro steel pipe is matched with the convex locking notch/the concave locking notch of the micro steel pipe adjacent to the micro steel pipe in parallel through the concave locking notch/the convex locking notch of the micro steel pipe so as to connect and fix the micro steel pipe adjacent to the micro steel pipe.
Preferably, sealing materials are coated or injected on the convex locking notch and the concave locking notch to prevent the underground water on the periphery of the riser curtain from penetrating into an underground space surrounded by the riser curtain.
Preferably, grouting holes are arranged on one side of the locking notch of the micro steel pipe, which is positioned outside the riser curtain, along the extension direction of the micro steel pipe and on the wall of the micro steel pipe at intervals of a set distance; each grouting hole is provided with a valve, and the valve is in a closed state before the micro steel pipe is jacked to the periphery of the underground project to be built; and
and for each grouting hole of the micro steel pipe, before grouting into the micro steel pipe, opening the valve to perform grouting and water plugging on soil around the locking notch of the micro steel pipe.
Further, the structure further includes: a plurality of circumferential supports;
each annular support is positioned between adjacent water stop blocking plane bodies and in a plane parallel to the water stop blocking plane bodies, and is arranged along the inner side wall of the marine riser curtain, the outer side wall of the micro steel pipe and the arrangement direction vertical to the positioning steel pipe:
the construction hole arranged on each positioning steel pipe is used for arranging an annular supporting steel pipe to the construction hole of the adjacent positioning steel pipe, and the adjacent annular supporting steel pipes are welded in each positioning steel pipe; or,
excavating a soil body from a construction hole arranged on each positioning steel pipe to a construction hole of an adjacent positioning steel pipe by adopting a mining method, and erecting a steel bar grating in a space formed after the soil body is excavated to form primary support; after the soil body is excavated and the inner side wall of the marine riser curtain is penetrated for a circle, annular supporting section steel is distributed in a space formed by the excavated soil body; in each positioning steel pipe, adjacent annular supporting section steels are connected to form the positioning steel pipe;
the construction hole is drilled in an underground space enclosed by the marine riser curtains from inside of each positioning steel pipe; and two construction holes are drilled in each positioning steel pipe and are respectively arranged on the connecting line perpendicular to the two locking ports of the positioning steel pipe and on two sides of the plane passing through the central point of the connecting line.
Preferably, the positioning steel pipes are arranged above and below the periphery of the underground engineering to be built in pairs, and the two paired positioning steel pipes are arranged in a vertical plane perpendicular to the ground.
Preferably, for the two positioning steel pipes in pair, on each positioning steel pipe, a construction hole is drilled in a vertical plane perpendicular to the ground and on a plane where the annular support is located, and the construction hole is led into an underground space surrounded by the riser curtains from inside the positioning steel pipe.
Further, the structure further includes: vertical support;
the vertical supports are arranged between the two paired positioning steel pipes in the plane where the annular supports are located; the steel pipe support structure is formed by jacking a vertical support steel pipe from a construction hole on one of two paired positioning steel pipes to a construction hole on the other positioning steel pipe, and fixing two ends of the vertical support steel pipe on the two paired positioning steel pipes respectively.
Preferably, the diameter of the positioning steel pipe is larger than that of the micro steel pipe; or the diameter of the positioning steel pipe is more than or equal to 2 meters, and the diameter of the micro steel pipe is less than 2 meters.
Preferably, the positioning steel pipe is injected with slurry.
In the technical scheme of the utility model, a just lining structure for building underground works has water proof function concurrently, namely the water-resisting pipe curtain around the underground works of wanting to build in the water-resisting structure, can prevent well that the peripheral groundwater of water-resisting pipe curtain from permeating the underground space that the water-resisting pipe curtain encloses, and through the stagnant water blocking plane body that founds in the water-resisting pipe curtain, prevented that the groundwater outside the water-resisting pipe curtain, the extending direction of water-resisting pipe curtain from getting into the space that water-resisting pipe curtain and stagnant water blocking plane body enclose; therefore, the water-resisting effect of the water-resisting structure is enhanced, the underground engineering can be constructed in the water-free space enclosed by the water-resisting pipe curtain and the water-stopping blocking plane body, the formation precipitation is avoided, the construction cost is saved, and the construction difficulty is reduced. Moreover, the annular supports formed along the inner side wall of the marine riser curtain and the outer side wall of the micro steel pipe and the vertical supports arranged between the paired positioning steel pipes in the plane where the annular supports are located can be arranged between the adjacent water stop blocking plane bodies, so that the effect that the marine riser curtain bears the water and soil pressure on the periphery of the marine riser curtain is enhanced.
Drawings
Fig. 1 is a flow chart of a method of constructing a water-proof structure according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the position relationship between the shaft, the positioning steel pipe and the underground engineering to be built according to the embodiment of the present invention;
fig. 3 is a schematic view of a riser curtain formed in a shaft according to an embodiment of the invention;
fig. 4 is a schematic view of the shape and connection of the groove-type locking notch and the protrusion-type locking notch according to the embodiment of the present invention;
fig. 5 is a schematic view of the water stop blocking plane body and the circumferential support according to the embodiment of the present invention;
fig. 6 is a schematic view of a grouted steel pipe according to an embodiment of the present invention;
fig. 7 is the utility model discloses hoop support, vertical braces lay ascending schematic diagram in the direction at the perpendicular to location steel pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and by referring to preferred embodiments. It should be understood, however, that the numerous specific details set forth in the specification are merely set forth to provide a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
The main idea of the utility model is that when the water-proof structure is built, in the pre-excavated vertical shaft, the positioning steel pipe and the micro steel pipe are laid in a non-excavation mode to form a water-proof pipe curtain surrounding the periphery of the underground engineering to be built; a plurality of grouting holes are preset in the wall of the micro steel pipe, and soil around the locking notch can be grouted through the grouting holes, so that the water-resisting effect of the water-resisting pipe curtain is enhanced;
moreover, construction can be carried out in the positioning steel pipe with larger diameter, and a plurality of water stop plane bodies vertical to the arrangement direction of the positioning steel pipe are formed in an underground space enclosed by the marine riser curtain, so that underground water in the extension direction of the marine riser curtain is prevented from entering a space enclosed by the marine riser curtain and the water stop plane bodies; thereby enhancing the water-resisting effect of the water-resisting structure and avoiding the formation precipitation.
The technical solution of the present invention will be described in detail with reference to the accompanying drawings. The embodiment of the utility model provides a method for building water proof structure, as shown in FIG. 1, specifically include following step:
s101: and (5) excavating a vertical shaft for the underground engineering to be built.
Specifically, as shown in fig. 2, a shaft 200 vertical to the ground may be excavated around the underground works 100 to be constructed by a method of constructing a shaft according to the prior art, so that workers may reach an operation position through the shaft and provide a construction space for subsequently jacking and positioning steel pipes and micro steel pipes.
S102: at least two positioning steel pipes 300 are arranged at the periphery of the underground works 100 to be built, perpendicular to the shaft 200.
Specifically, as shown in fig. 2, at least two positioning steel pipes 300 are laid in a non-excavation manner (such as a small shield, a jacking pipe or a rammed pipe) at the periphery of the underground project 100 to be built in a direction perpendicular to the extending direction of the shaft 200; the arrangement position and the number of the positioning steel pipes 300 are set by engineering personnel; preferably, the positioning steel pipes 300 may be arranged at inflection points on the periphery of the underground works 100 to be built, and if the underground works 100 to be built have a multi-span structure, the positioning steel pipes 300 may be arranged in pairs above and below the periphery of the underground works 100 to be built.
For example, as shown in fig. 3, 8 positioning steel pipes 300 are arranged at the periphery of the underground works 100 to be built, and are respectively located above and below the periphery of the underground works 100 to be built.
S103: and arranging micro steel pipes 310 perpendicular to the extending direction of the shaft 200 between two adjacent positioning steel pipes 300 on the periphery of the underground engineering 100 to be built to form a riser curtain which surrounds the periphery of the underground engineering 100 to be built by one circle.
Specifically, as shown in fig. 3, micro steel pipes 310 are arranged perpendicular to the extending direction of the shaft 200 between two adjacent positioning steel pipes 300 at the periphery of the underground engineering 100 to be built, and the adjacent positioning steel pipes and the micro steel pipes and the adjacent two micro steel pipes are connected through locking openings to form a riser curtain surrounding the periphery of the underground engineering 100 to be built by one circle, so that the groundwater at the periphery of the riser curtain is prevented from penetrating into the underground space surrounded by the riser curtain. Wherein, the diameter parameters of the positioning steel pipe and the micro-steel pipe can be set according to the drilling process, the hydrogeology, the construction strength and the manufacturing cost; the locking notch is welded on the wall of each positioning steel pipe 300 and each micro steel pipe 310 in advance, and the length of the locking notch of the positioning steel pipe 300 is the same as that of the positioning steel pipe 300; the length of the locking notch of the micro steel pipe 310 is the same as the length of the micro steel pipe 310.
As shown in fig. 4, the above-mentioned locking notch generally includes: a groove-type locking notch 320 and a protrusion-type locking notch 330; and the female lock notch 320 includes at least one recessed portion and the male lock notch 330 includes at least one protruding portion so that the protruding portion of the male lock notch 330 can be received in the recessed portion of the female lock notch 320.
Correspondingly, between adjacent location steel pipe and little steel pipe to and be connected the mode through the fore shaft between two adjacent little steel pipes, specifically can be: the positioning steel tube 300 is matched with the convex locking notch/concave locking notch of the micro steel tube 310 adjacent to the positioning steel tube through the concave locking notch/convex locking notch of the positioning steel tube so as to connect and fix the micro steel tube 310 adjacent to the positioning steel tube; and, the micro steel pipe 310 is matched with the convex locking notch/concave locking notch of the micro steel pipe adjacent to the micro steel pipe by the concave locking notch/convex locking notch to connect and fix the micro steel pipe adjacent to the micro steel pipe. Moreover, a certain gap is formed between the groove-shaped locking notch 320 and the protrusion-shaped locking notch 330, so that the connected positioning steel tube 300 and the micro steel tube 310, and the two connected micro steel tubes 310 can rotate in the extending direction of the locking notch within a certain angle range (e.g. 0 degree to 10 degrees), and thus, when the positioning steel tube 300 and the micro steel tubes 310 are connected to form a tube curtain, the flexibility is higher.
Preferably, sealing materials (such as butter and the like) can be smeared or injected on the convex locking notches 330 and the concave locking notches 320 before the positioning steel pipes are arranged and the micro steel pipes are pushed forward, so that underground water on the periphery of the riser curtain can be better prevented from penetrating into an underground space surrounded by the riser curtain.
Moreover, the locking notch also has a guiding function, that is, when the micro steel pipe 310 is jacked, the jacking direction of the later jacked micro steel pipe 310 can be controlled through the locking notch on the positioning steel pipe 300 which is arranged in advance or the locking notch on the earlier jacked micro steel pipe 310, so that the jacking accuracy of the micro steel pipe 310 in the forming process of the riser curtain can be increased.
S104: grouting each micro steel pipe 310.
Specifically, each micro steel pipe 310 is grouted (for example, with cement slurry), so that the rigidity of the micro steel pipe is increased, the marine riser curtain is prevented from bending and deforming, and the marine riser curtain is enhanced to bear the action of the water and soil pressure on the periphery of the marine riser curtain.
More preferably, grouting holes 340 (shown in fig. 4) are drilled at set intervals (about 0.5 m) on the wall of the micro steel pipe 310 along the extending direction of the micro steel pipe 310 at one side of the locking notch of the micro steel pipe 310 outside the riser curtain; and each grouting hole 340 is provided with a valve which is closed before the micro steel pipe 310 is jacked to the periphery of the underground work 100 to be built.
Like this, wait that micro steel pipe 310 pushes up to target in place, before the slip casting is gone into to every micro steel pipe 310, to every grouting hole of micro steel pipe 310, open the valve in this grouting hole after, carry out the slip casting water shutoff to the soil body around the fore shaft of micro steel pipe 310 through this valve to, the water proof effect of reinforcing fore shaft further prevents that the peripheral groundwater of riser curtain from permeating to the underground space that the riser curtain encloses. Before grouting into each micro steel pipe 310, an engineer can open the valve, and grout with a water plugging effect is injected into the soil around the locking port of the micro steel pipe 310, and after the soil body penetrating the grout reaches the water plugging strength, grouting into the micro steel pipe 310.
S105: a plurality of water blocking plane bodies 400 vertical to the positioning steel pipes 300 are constructed in an underground space enclosed by the marine riser curtains.
Specifically, as shown in fig. 5, a plurality of water stop blocking plane bodies 400 which are perpendicular to the arrangement direction of the positioning steel pipes 300 and are at unequal distances from the shaft 200 are constructed in an underground space surrounded by the riser curtains, so that underground water in the extension direction of the riser curtains is prevented from entering the space surrounded by the riser curtains and the water stop blocking plane bodies 400; that is, the distances of the different water stop planar bodies 400 from the shaft 200 are different; in other words, the water blocking plane bodies 400 perpendicular to the arrangement direction of the positioning steel pipes 300 are provided at different positions along the arrangement direction of the positioning steel pipes 300 in the underground space surrounded by the marine riser curtain.
In fact, for each water stop blocking plane body 400, the engineer may preset (design) the distance between the water stop blocking plane body 400 and the shaft 200 and construct the water stop blocking plane body 400 according to the preset distance.
The construction process of one of the water stop blocking plane bodies 400 is as follows: selecting at least two positioning steel pipes 300 as construction steel pipes; according to the preset (designed) distance between the water stop plane body 400 and the shaft 200, in a plane which is vertical to the construction steel pipe and is equal to the preset distance between the water stop plane body 400 and the shaft 200, a plurality of through holes are punched in each construction steel pipe in an underground space surrounded by the riser curtains; after a grouting steel pipe 410 (shown in fig. 6) is arranged in the underground space surrounded by the riser curtains from the inside of the construction steel pipe by each through hole, grout is injected into the grouting steel pipe 410, and the grout penetrates into soil on the periphery of the grouting steel pipe 410 through the grouting steel pipe 410; after the soil body permeated with the slurry reaches the set water plugging strength, the water-blocking plane body 400 is formed. The grout injected into the grouting steel pipe can be selected according to the condition of the stratum where the underground engineering to be built is located, and particularly can be grout with a water plugging function.
Thus, after the water stop blocking plane body is built in the underground space enclosed by the marine riser curtain, the marine riser structure formed by the marine riser curtain and the water stop blocking plane body in the underground space enclosed by the marine riser curtain is built.
For example, FIG. 6 is a schematic view of a grouting steel pipe provided at section I-I of FIG. 5; as shown in fig. 6, the grouting steel pipe 410 is in a plane perpendicular to the construction steel pipe and having a distance from the shaft 200 equal to a distance between the water stop plane body 400 and the shaft 200 set in advance; and when the engineering personnel hit and establish each slip casting steel pipe, can make each slip casting steel pipe evenly distributed in the underground space that the marine riser curtain encloses as far as possible, like this, after slip casting through the slip casting steel pipe, the soil body of infiltration thick liquid can form the stagnant water better and block up plane body 400.
S106: forming a circumferential support 600 between adjacent ones of the water stop planar bodies 400.
Specifically, as shown in fig. 5, in order to enhance the effect of the water-soil pressure on the marine riser curtain, a circumferential support 600 may be formed between the adjacent water-stop blocking plane bodies 400, specifically: two construction holes are drilled in the underground space enclosed by the marine riser curtain in each positioning steel pipe 300 in the plane parallel to the water stop blocking plane body 400 and between the adjacent water stop blocking plane bodies 400, wherein the two construction holes are through holes positioned on the positioning steel pipes 300 and are respectively arranged at two sides of the plane which is perpendicular to the connecting line of the two locking ports of the positioning steel pipes 300 and passes through the central point of the connecting line;
along the inner side wall of the riser curtain and the outer side wall of the micro steel pipe 310, in the direction perpendicular to the arrangement direction of the positioning steel pipes 300, the following construction is carried out by adopting a non-excavation mode (such as a pipe jacking method) or a mine method:
if the pipe jacking method is adopted for construction, after the annular support steel pipes (as shown in fig. 7 and fig. 7 is a schematic view of a section II-II in fig. 5) are jacked (or arranged) from each construction hole to the construction hole of the adjacent positioning steel pipe, the adjacent annular support steel pipes are welded (as shown in a welding part 610 in fig. 7) in each positioning steel pipe, and the annular support steel pipes which are welded and connected form an annular support 600 which is between the adjacent water stop blocking plane bodies 400 and is parallel to the water stop blocking plane bodies 400;
if the mining method is adopted for construction, soil is excavated from each construction hole to the construction holes of the adjacent positioning steel pipes along the inner side wall of the marine riser curtain, and a space formed by the excavated soil is subjected to primary support by adopting a steel bar grating with a certain distance (such as 0.5 meter); excavating a soil body and penetrating the soil body for a circle, and then arranging annular support section steel in the formed space; in each positioning steel pipe, the annular supporting section steel is welded, the connected annular supporting section steel is welded, and the annular support 600 parallel to the water stop blocking plane body 400 is arranged between the adjacent water stop blocking plane bodies 400.
Therefore, construction operations such as cutting and welding can be carried out only inside the positioning steel pipe, the annular support 600 is formed along the inner side wall of the marine riser curtain and the outer side wall of the micro steel pipe, the construction operations such as cutting and welding of the micro steel pipe are avoided, the construction difficulty is reduced, and the construction progress is improved; and after forming the hoop support 600, can also support the intraductal slip casting of steel to the hoop, thick liquid (like grout) reaches the intensity after, has further strengthened the marine riser curtain and has born the effect of its outlying soil and water pressure.
Preferably, the constructed water stop blocking plane body 400 further has a certain supporting effect on the riser curtain, so that the annular support 600 can be formed at the middle position of two adjacent water stop blocking plane bodies 400, and thus, the supporting force of the riser curtain in the direction perpendicular to the positioning steel pipe 300 is uniform, and the effect that the riser curtain bears the water and soil pressure on the periphery of the riser curtain is further enhanced.
Typically, the diameter of the positioning steel tube is larger than the diameter of the micro steel tube; or the diameter of the positioning steel pipe is more than or equal to 2 meters (such as 3 meters), and the diameter of the micro steel pipe is less than 2 meters (such as 1 meter); like this, can make things convenient for engineering personnel etc. to be under construction inside the location steel pipe, moreover, be convenient for carry out the construction operation in order to form the hoop and support 600 in the location steel pipe.
Furthermore, the positioning steel pipes can be arranged above and below the periphery of the underground engineering to be built in pairs, and the two positioning steel pipes in pairs are arranged in a vertical plane perpendicular to the ground (as shown in fig. 7), so that if the underground engineering to be built is of a multi-span structure, after the annular support 600 is formed, the vertical support 620 can be arranged in the plane where the annular support 600 is located; wherein, the setting of vertical support 620 specifically can be: for the two positioning steel pipes in pair, a construction hole is drilled in an underground space enclosed by the marine riser curtain in each positioning steel pipe, and the construction holes are positioned in a plane where the annular support 600 is positioned and a vertical plane vertical to the ground; jacking the vertical supporting steel pipe from the construction hole in one of the positioning steel pipes to the construction hole in the other positioning steel pipe; grouting is carried out in one of the positioning steel pipes to the vertical support steel pipe, and after the strength of grout (such as cement paste) is reached, a vertical support 620 is formed. Wherein, two ends of the vertical support 620 are respectively fixed (e.g. welded) to the two positioning steel pipes 300 in pair. Thus, the effect of the riser curtain on its surrounding water and soil pressure is further enhanced.
S107: grouting is performed into each of the positioning steel pipes 300.
Specifically, after the annular support 600 is formed in step S106, grouting may be performed into each positioning steel pipe 300 in this step, so as to further increase the rigidity of the water stop structure formed by the water stop curtain, the water stop planar body 400, and the annular support 600. . The grouting is carried out in each positioning steel pipe, and the injected grout (such as cement paste) can reach certain strength after being solidified, so that the rigidity of the waterproof structure can be improved.
To the underground works that want to build, after accomplishing to build water proof structure, build underground works in the underground space that the riser curtain of water proof structure encloses, specifically can be: and (3) constructing the underground engineering from the vertical shaft to an underground space surrounded by the marine riser curtains, and at the position of a water stop blocking plane body of the marine riser structure, breaking the water stop blocking plane body and then continuing the construction of the underground engineering. Further, after the permanent structure of the constructed underground engineering reaches the strength, the vertical supports are dismantled.
The inventor of the utility model will utilize above-mentioned Method to build water-proof structure, and the Method of carrying out underground works's building is called the big Pipe curtain Method for short (SPR, Super Pipe Roof Method).
When the underground engineering is built, soil in the underground space of the marine riser curtain wall can be excavated by a step method, a canopy frame method and the like, and different structural types can be formed for the underground engineering to be built, such as multi-arch multi-span, single-arch single-span, flat-top straight wall, flat-top curved wall and the like; because the water-proof structure of the constructed underground engineering has good water-proof effect, the formation precipitation is avoided, therefore, the soil body can be efficiently excavated, and the construction progress when the underground engineering is constructed is improved. Furthermore, in the process of constructing underground engineering, a transverse support perpendicular to the vertical support can be arranged in the plane where the annular support is located, and the effect that the marine riser curtain bears the pressure of surrounding water and soil is further enhanced.
Moreover, the marine riser curtain can be only used as an initial temporary shed protection structure and can also be used as an initial temporary shed protection structure and a permanent secondary lining structure; if the water-resisting pipe curtain is used as an initial temporary shed protection structure, soil body excavation is carried out, and after a waterproof layer of an underground project to be built is arranged in an underground space surrounded by the water-resisting pipe curtain, a complete lining stressed concrete frame structure (the thickness of a soil-facing wallboard is 600-900 mm) is constructed;
if the pipe curtain is used as an initial temporary shed protection structure and a permanent secondary lining structure, after soil body excavation is carried out, and a waterproof layer of underground engineering to be built is arranged in an underground space surrounded by the water-resisting pipe curtain, a thin-layer lining waterproof concrete structure (the thickness of the soil-facing wall panel is 300-500 mm) is applied; moreover, the positioning steel pipe with larger diameter can be partially cut or retained according to the function of the positioning steel pipe with larger diameter in a permanent two-lining structure, and the retained positioning steel pipe can be subjected to appearance treatment.
In fact, the underground works of wanting to build still can include some additional structures, and to some additional structures of the underground works of wanting to build, can pass through the utility model discloses a water proof structure's construction method is connected the water proof structure of additional structure with the underground works's of wanting to build to can set up the ring beam of inside lining concrete structure at the kneck, perhaps adjust the position of the hoop support in the riser curtain and strengthen the supporting role at the kneck.
Based on the above method for constructing a water-resisting structure, the constructed primary lining structure, i.e. water-resisting structure, for constructing an underground project, which has a water-resisting function, as shown in fig. 2 to 7, includes: a riser curtain around the periphery of the underground work 100 to be built and a plurality of water stop choke plane bodies 400.
Wherein, the marine riser curtain specifically includes: at least two positioning steel pipes 300 and micro steel pipes 310; the positioning steel pipes 300 are arranged in the peripheral soil of the underground engineering 100 to be built from the extending direction which is vertical to the shaft 200 built for the underground engineering 100 to be built; the micro steel pipes 310 between two adjacent positioning steel pipes 300 are jacked into the peripheral soil of the underground engineering 100 to be built from the direction vertical to the extending direction of the shaft 200; the adjacent positioning steel pipes and the micro steel pipes, and the adjacent two micro steel pipes are connected through locking notches; and each micro steel pipe is internally injected with slurry.
The plurality of water stop blocking plane bodies 400 are parallelly arranged in an underground space enclosed by the riser curtains, are vertical to the positioning steel pipe 300, are at unequal distances from the vertical shaft 200, and prevent underground water in the extending direction of the riser curtains from entering the space enclosed by the riser curtains and the water stop blocking plane bodies; wherein, each water stop blocking plane body 400 is arranged in a plane with the distance from the shaft 200 equal to the preset distance between the water stop blocking plane body 400 and the shaft 200; the grouting material is formed after grout is injected into the grouting steel pipe 410 arranged in the plane, and after the grout permeates into soil on the periphery of the grouting steel pipe 410 through the grouting steel pipe 410, the soil permeating the grout reaches the set water plugging strength; after at least two positioning steel pipes 300 are selected as construction steel pipes, a plurality of through holes are drilled in the plane and in each construction steel pipe to the underground space surrounded by the marine riser curtains, and then each through hole is drilled from the inside of the construction steel pipe to the underground space surrounded by the marine riser curtains.
The length of the locking notch of the positioning steel pipe 300 is the same as the length of the positioning steel pipe 300; the length of the locking notch of the micro steel pipe 310 is the same as that of the micro steel pipe 310; and the locking notch comprises: a groove type locking notch 320 and a protrusion type locking notch 330.
Correspondingly, the positioning steel tube 300 is matched with the convex locking notch/concave locking notch of the micro steel tube 310 adjacent to the positioning steel tube through the concave locking notch/convex locking notch of the positioning steel tube so as to connect and fix the micro steel tube 310 adjacent to the positioning steel tube; the micro steel pipe 310 is matched with the convex locking notch/the concave locking notch of the micro steel pipe adjacent to the micro steel pipe and arranged side by side through the concave locking notch/the convex locking notch of the micro steel pipe to connect and fix the micro steel pipe adjacent to the micro steel pipe; and sealing materials are coated or injected on the convex locking port and the groove-shaped locking port, so that underground water on the periphery of the marine riser curtain is prevented from permeating into an underground space surrounded by the marine riser curtain.
More preferably, grouting holes 340 are drilled at intervals of a set distance (about 0.5 m) on the wall of the micro steel pipe 310 along the extension direction of the micro steel pipe 310 at one side of the locking notch of the micro steel pipe 310 outside the riser curtain; and each grouting hole 340 is provided with a valve which is in a closed state before the micro steel pipe 310 is jacked to the periphery of the underground project 100 to be built; and, for each grouting hole 340 of the micro steel pipe 310, the valve of the grouting hole 340 is used for grouting and water plugging the soil around the locking notch of the micro steel pipe 310 by opening the valve before grouting into the micro steel pipe 310.
Further, above-mentioned water proof structure still includes: a plurality of circumferential supports 600;
each annular support 600 is located between adjacent water stop blocking plane bodies 400 and in a plane parallel to the water stop blocking plane bodies 400, and is arranged along the inner side wall of the riser curtain, the outer side wall of the micro steel pipe 310 and in the arrangement direction perpendicular to the positioning steel pipe 300:
the annular supporting steel pipes are jacked into the construction holes of the adjacent positioning steel pipes from the construction holes arranged on each positioning steel pipe 300, and the adjacent annular supporting steel pipes are welded in each positioning steel pipe 300;
or excavating a soil body from the construction hole arranged on each positioning steel pipe to the construction hole of the adjacent positioning steel pipe by adopting a mining method, and erecting a steel bar grating in a space formed after the soil body is excavated to form primary support; after the soil body is excavated and the inner side wall of the marine riser curtain is penetrated for a circle, annular supporting section steel is distributed in a space formed by the excavated soil body; in each positioning steel pipe, adjacent annular supporting section steels are connected to form the positioning steel pipe;
wherein, the construction hole is drilled in the underground space enclosed by each positioning steel pipe 300 to the marine riser curtain; and two construction holes are drilled in each positioning steel pipe 300, and the two construction holes are respectively arranged on the two sides of a plane perpendicular to the connecting line of the two locking holes of the positioning steel pipe 300 and passing through the central point of the connecting line.
Further, above-mentioned water proof structure still includes: a vertical support 620;
correspondingly, the positioning steel pipes 300 can be arranged above and below the periphery of the underground engineering to be built in pairs, and the two paired positioning steel pipes are arranged in a vertical plane perpendicular to the ground; and for two location steel pipes in pairs, on each location steel pipe, a construction hole is drilled in the plane where the annular support is located and the vertical plane vertical to the ground, and the construction hole is led into the underground space enclosed by the riser curtain in the location steel pipe.
The vertical supports 620 are arranged between the two paired positioning steel pipes in the plane where the annular supports 600 are located; the steel pipe support structure is formed by jacking a vertical support steel pipe from a construction hole on one of two paired positioning steel pipes to a construction hole on the other positioning steel pipe, and fixing two ends of the vertical support steel pipe on the two paired positioning steel pipes respectively.
Wherein the diameter of the positioning steel pipe is larger than that of the micro steel pipe; or the diameter of the positioning steel pipe is more than or equal to 2 meters, and the diameter of the micro steel pipe is less than 2 meters; and each positioning steel pipe is injected with slurry.
To sum up, in the technical solution of the present invention, a primary lining structure for constructing an underground construction having a water-stop function, i.e. a water-stop tube curtain surrounding the underground construction to be constructed in the water-stop structure for a circle, can well prevent the groundwater at the periphery of the water-stop tube curtain from penetrating into the underground space surrounded by the water-stop tube curtain, and prevent the groundwater outside the water-stop tube curtain and in the extending direction of the water-stop tube curtain from entering the space surrounded by the water-stop tube curtain and the water-stop plane body through the water-stop plane body constructed in the water-stop tube curtain; therefore, the water-resisting effect of the water-resisting structure is enhanced, the underground engineering can be constructed in the water-free space enclosed by the water-resisting pipe curtain and the water-stopping blocking plane body, the formation precipitation is avoided, the construction cost is saved, and the construction difficulty is reduced. Moreover, the annular supports formed along the inner side wall of the marine riser curtain and the outer side wall of the micro steel pipe and the vertical supports arranged between the paired positioning steel pipes in the plane where the annular supports are located can be arranged between the adjacent water stop blocking plane bodies, so that the effect that the marine riser curtain bears the water and soil pressure on the periphery of the marine riser curtain is enhanced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a just line structure for building underground works has water proof function concurrently which characterized in that includes: a riser curtain and a plurality of water-stop blocking plane bodies surrounding the periphery of the underground project to be built;
the riser curtain comprises: at least two positioning steel pipes and micro steel pipes; the positioning steel pipes are distributed in the peripheral soil body of the underground engineering to be built from the extending direction which is vertical to the shaft well to be built for the underground engineering to be built; the micro steel pipes are arranged between two adjacent positioning steel pipes and are jacked into the peripheral soil body of the underground engineering to be built from the direction vertical to the extending direction of the vertical shaft; the adjacent positioning steel pipes and the micro steel pipes, and the adjacent two micro steel pipes are connected through locking notches; and slurry is injected into each micro steel pipe;
the plurality of water stop blocking plane bodies are parallelly arranged in an underground space enclosed by the marine riser curtains, are vertical to the positioning steel pipes and are different from the vertical shaft in distance; wherein,
each water stop blocking plane body is arranged in a plane, the distance between the plane body and the vertical shaft is equal to the preset distance between the water stop blocking plane body and the vertical shaft, grout is injected into a grouting steel pipe arranged in the plane, and after the grout permeates into soil bodies on the periphery of the grouting steel pipe through the grouting steel pipe, the soil bodies permeating the grout reach the set water blocking strength; after at least two positioning steel pipes are selected as construction steel pipes, a plurality of through holes are drilled in the plane and in each construction steel pipe to the underground space surrounded by the marine riser curtains, and then the through holes are drilled from the construction steel pipes to the underground space surrounded by the marine riser curtains.
2. The structure of claim 1, wherein the length of the locking notch of the positioning steel pipe is the same as the length of the positioning steel pipe; the length of the locking notch of the micro steel pipe is the same as that of the micro steel pipe; and the locking notch comprises: a groove-type locking notch and a protrusion-type locking notch; and
the positioning steel pipe is matched with the convex locking notch/the concave locking notch of the micro steel pipe adjacent to the positioning steel pipe and arranged side by side through the concave locking notch/the convex locking notch of the positioning steel pipe so as to connect and fix the micro steel pipe adjacent to the positioning steel pipe; and
the micro steel pipe is matched with the convex locking notch/the concave locking notch of the micro steel pipe adjacent to the micro steel pipe in parallel through the concave locking notch/the convex locking notch of the micro steel pipe so as to connect and fix the micro steel pipe adjacent to the micro steel pipe.
3. The structure of claim 2,
sealing materials are coated or injected on the convex locking port and the groove-shaped locking port, and therefore underground water on the periphery of the riser curtain is prevented from permeating into an underground space surrounded by the riser curtain.
4. The structure of claim 2 or 3, wherein grouting holes are drilled at set intervals on the wall of the micro steel pipe along the extension direction of the micro steel pipe at one side of the locking notch of the micro steel pipe, which is positioned outside the riser curtain; each grouting hole is provided with a valve, and the valve is in a closed state before the micro steel pipe is jacked to the periphery of the underground project to be built; and
and for each grouting hole of the micro steel pipe, before grouting into the micro steel pipe, opening the valve to perform grouting and water plugging on soil around the locking notch of the micro steel pipe.
5. The structure of claim 4, further comprising: a plurality of circumferential supports;
each annular support is positioned between adjacent water stop blocking plane bodies and in a plane parallel to the water stop blocking plane bodies, and is arranged along the inner side wall of the marine riser curtain, the outer side wall of the micro steel pipe and the arrangement direction vertical to the positioning steel pipe:
the construction hole arranged on each positioning steel pipe is used for arranging an annular supporting steel pipe to the construction hole of the adjacent positioning steel pipe, and the adjacent annular supporting steel pipes are welded in each positioning steel pipe; or,
excavating a soil body from a construction hole arranged on each positioning steel pipe to a construction hole of an adjacent positioning steel pipe by adopting a mining method, and erecting a steel bar grating in a space formed after the soil body is excavated to form primary support; after the soil body is excavated and the inner side wall of the marine riser curtain is penetrated for a circle, annular supporting section steel is distributed in a space formed by the excavated soil body; in each positioning steel pipe, adjacent annular supporting section steels are connected to form the positioning steel pipe;
the construction hole is drilled in an underground space enclosed by the marine riser curtains from inside of each positioning steel pipe; and two construction holes are drilled in each positioning steel pipe and are respectively arranged on the connecting line perpendicular to the two locking ports of the positioning steel pipe and on two sides of the plane passing through the central point of the connecting line.
6. The structure of claim 5, wherein the positioning steel pipes are arranged in pairs above and below the periphery of the underground works to be built, and two positioning steel pipes in a pair are arranged in a vertical plane perpendicular to the ground.
7. The structure of claim 6,
and for the two positioning steel pipes in pair, on each positioning steel pipe, a construction hole is drilled in the plane where the annular support is located and the vertical plane vertical to the ground, and the construction hole is communicated into the underground space surrounded by the marine riser curtains from the inside of the positioning steel pipe.
8. The structure of claim 7, further comprising: vertical support;
the vertical supports are arranged between the two paired positioning steel pipes in the plane where the annular supports are located; the steel pipe support structure is formed by jacking a vertical support steel pipe from a construction hole on one of two paired positioning steel pipes to a construction hole on the other positioning steel pipe, and fixing two ends of the vertical support steel pipe on the two paired positioning steel pipes respectively.
9. The structure of any one of claims 5-8, wherein the diameter of the positioning steel tube is larger than the diameter of the micro steel tube; or the diameter of the positioning steel pipe is more than or equal to 2 meters, and the diameter of the micro steel pipe is less than 2 meters.
10. A structure according to any one of claims 5 to 8, wherein the steel locating tube is impregnated with grout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499386.6U CN203584437U (en) | 2013-08-15 | 2013-08-15 | First lining structure used for constructing underground engineering and having water-resisting function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499386.6U CN203584437U (en) | 2013-08-15 | 2013-08-15 | First lining structure used for constructing underground engineering and having water-resisting function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437789A (en) * | 2013-08-15 | 2013-12-11 | 北京市轨道交通设计研究院有限公司 | Method for constructing water proof structure and constructing underground construction in water proof mode |
| CN104712341A (en) * | 2015-03-16 | 2015-06-17 | 中铁第一勘察设计院集团有限公司 | Shallow burial soil area shield driving stratum strengthening system and construction method thereof |
| CN107605512A (en) * | 2017-09-12 | 2018-01-19 | 中铁十八局集团有限公司 | Antipriming and its construction method between a kind of large diameter steel pipe pipe curtain spigot-and-socket pipe |
-
2013
- 2013-08-15 CN CN201320499386.6U patent/CN203584437U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437789A (en) * | 2013-08-15 | 2013-12-11 | 北京市轨道交通设计研究院有限公司 | Method for constructing water proof structure and constructing underground construction in water proof mode |
| CN104712341A (en) * | 2015-03-16 | 2015-06-17 | 中铁第一勘察设计院集团有限公司 | Shallow burial soil area shield driving stratum strengthening system and construction method thereof |
| CN107605512A (en) * | 2017-09-12 | 2018-01-19 | 中铁十八局集团有限公司 | Antipriming and its construction method between a kind of large diameter steel pipe pipe curtain spigot-and-socket pipe |
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