CN210049906U - Underground pipe curtain supporting structure and guide hole water storage system - Google Patents

Abstract

The utility model discloses an underground pipe curtain bearing structure and pilot tunnel water storage system, underground pipe curtain bearing structure includes: first pipe canopy sets up in secret accommodation space for support secret accommodation space, first pipe canopy includes a plurality of first pipe curtain steel pipes, and is adjacent its lateral wall cooperation of first pipe curtain steel pipe links to each other, first pipe canopy is by a plurality of orientations the wavy support canopy that the domes that underground accommodation space top set up constitute. Thereby make the pipe canopy low-angle raise effectively through setting up wavy pipe canopy, both can support underground accommodation space effectively, still avoided the pipe canopy to raise the big and support the problem that the intensity is low of the big and support of the pipe canopy construction degree of difficulty when the range is great.

Description

Underground pipe curtain supporting structure and guide hole water storage system

Technical Field

The utility model relates to an underground space construction technical field, concretely relates to underground pipe curtain bearing structure and pilot tunnel water storage system.

Background

At present, the underground space is developed and utilized more and more in China, and facilities such as a regulation pool, a subway, a station and the like in a general large underground space all adopt a non-excavation construction technology. The pipe curtain construction method adopts a small-caliber pipe curtain construction method which comprises the following steps: the pipe curtain steel pipes are jacked into the periphery or arch part of the proposed underground space and are connected by adopting the lock catches to form a closed or semi-closed curtain structure, and then the large-span section underground excavation project is constructed under the protection of the pipe curtain structure.

The prior art pipe curtain is a horizontally arranged pipe curtain composed of a plurality of steel pipes uniformly arranged along the horizontal direction, or an arch structure composed of a plurality of steel pipes. Its support intensity of the pipe curtain of above-mentioned two kinds of structures is relatively poor, to the construction requirement with the degree of difficulty higher, the complicated section that collapses appears easily, the rigidity of its pipe curtain top soil body is difficult to guarantee to current pipe curtain, and can't reduce the stratum deformation effectively and upwards propagate, can leave great potential safety hazard for the underground construction.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims at providing an underground pipe curtain bearing structure and pilot tunnel water storage system to solve its relatively poor problem of support intensity of the pipe curtain among the prior art, with the rigidity of guaranteeing its pipe curtain top soil body, and reduce the stratum deformation effectively and upwards propagate. Therefore, the utility model provides an underground pipe curtain bearing structure, include:

first pipe canopy sets up in secret accommodation space for support secret accommodation space, first pipe canopy include a plurality of first pipe curtain steel pipes, and its lateral wall cooperation of adjacent first pipe curtain steel pipe links to each other, and first pipe canopy is the wavy support canopy that constitutes by a plurality of domes towards secret accommodation space top setting.

Underground pipe curtain bearing structure, including setting up the second pipe canopy in first pipe canopy below, the second pipe canopy includes a plurality of second pipe curtain steel pipes, and its lateral wall cooperation of adjacent second pipe curtain steel pipe links to each other.

The diameter of the second pipe curtain steel pipe is smaller than that of the first pipe curtain steel pipe.

The second pipe shed is connected with the first pipe shed in a matching way.

At least one of the plurality of arch structures of the first pipe shed is provided with an extension part which extends towards the direction far away from the underground accommodating space, and the extension part is connected with the second pipe shed in a matching way.

The second pipe shed is connected with the first pipe shed in a welding mode.

The second pipe canopy is with first pipe canopy shape looks adaptation, and the wavy canopy that supports that the domes that constitute by a plurality of orientation underground accommodation space tops set up has the bulge of keeping away from underground accommodation space top extension towards the second pipe canopy, and its extension of first pipe canopy links to each other with the bulge.

The first pipe curtain steel pipe is connected through the locking structure, and/or the second pipe curtain steel pipe is connected through the locking structure.

The hasp structure is including setting up in first pipe curtain steel pipe and/or second pipe curtain steel pipe both sides and cross section for triangular angle connector, and its two looks lock joint in opposite directions of adjacent angle connector links to each other.

The first pipe curtain steel pipe and/or the second pipe curtain steel pipe are/is provided with grouting holes for allowing slurry to enter the first pipe curtain steel pipe and/or the second pipe curtain steel pipe, and the first pipe shed and/or the second pipe shed are/is reinforced and sealed through slurry.

A pilot tunnel water storage system comprising:

the above underground pipe curtain support structure, and

the regulating and storing pool for storing water is composed of a plurality of guide holes.

The first pipe shed is fixedly connected with the inner wall of the storage tank and/or fixedly connected with a grid which is arranged in the storage tank and used for reinforcing the storage tank; and/or the second pipe shed is fixedly connected with the inner wall of the regulation and storage pool and/or is fixedly connected with a grid which is arranged in the regulation and storage pool and used for reinforcing the regulation and storage pool.

The technical scheme of the utility model, have following advantage:

1. the utility model provides an underground pipe curtain bearing structure, include: first pipe canopy sets up in secret accommodation space for support secret accommodation space, first pipe canopy include a plurality of first pipe curtain steel pipes, and its lateral wall cooperation of adjacent first pipe curtain steel pipe links to each other, and first pipe canopy is the wavy support canopy that comprises a plurality of domes towards secret accommodation space top setting. Thereby make the pipe canopy low-angle raise effectively through setting up wavy pipe canopy, both can support underground accommodation space effectively, when still having avoided being the domes of a great radian among the prior art with the pipe canopy, the top of its domes need accept great pressure and lead to the problem that current pipe canopy supports the intensity low. Moreover, the problem that a large space needs to be dug out at the middle protruding position of the arch structure of the pipe shed with a single arch structure, and the construction difficulty is high is solved. A plurality of domes in this application can receive pipe curtain top soil body under the pipe curtain top soil body pressure effect at underground pipe curtain bearing structure and take place the small-amplitude deformation thereby support the pipe curtain top soil body, reduce the stratum simultaneously effectively and warp and upwards propagate, guarantee underground construction safety.

2. The utility model provides an underground pipe curtain bearing structure, including setting up the second pipe canopy in first pipe canopy below, the second pipe canopy includes a plurality of second pipe curtain steel pipes, and its lateral wall cooperation of adjacent second pipe curtain steel pipe links to each other. Above-mentioned first pipe shed and second pipe shed combined action support secret accommodation space, after leaking the clearance between its a plurality of first pipe curtain steel pipes of first pipe shed as soil, the second pipe shed can support the soil body of leaking, guarantees the structural strength of secret accommodation space to guarantee the rigidity of its pipe curtain top soil body, and reduce the stratum deformation effectively and upwards propagate.

3. The utility model provides an underground pipe curtain bearing structure, the diameter of second pipe curtain steel pipe is less than the diameter of first pipe curtain steel pipe. Therefore, the gap between the adjacent second pipe curtain steel pipes of the second pipe shed is smaller than that of the adjacent second pipe curtain steel pipes of the first pipe shed. Thereby make the second pipe canopy can hold the soil that leaks from its clearance of first pipe canopy, guarantee underground accommodation space's structural strength.

4. The utility model provides an underground pipe curtain bearing structure, second pipe canopy link to each other with the cooperation of first pipe canopy, make its the two bearing underground holding space jointly, share the pressure that underground holding space top brought. For two first pipe sheds and second pipe sheds that set up alone, the danger that first pipe shed takes place the not hard up even collapse of structure easily when avoiding appearing first pipe shed and bear alone great pressure makes the second pipe shed undertake partial pressure for first pipe shed in this application, has reduced the pressure of first pipe shed effectively, has improved underground pipe curtain bearing structure's whole support intensity.

5. The utility model provides an underground pipe curtain bearing structure, at least one among its a plurality of domes of first pipe canopy has the extension of keeping away from underground accommodation space direction extension towards, and the extension links to each other with the cooperation of second pipe canopy. The first pipe shed of wavy that above-mentioned a plurality of domes constitute, one of them or a plurality of domes of first pipe shed's extension and second pipe shed cooperation link to each other, can link together first pipe shed and second pipe shed simply reliably through above-mentioned extension to make the second pipe shed support first pipe shed reliably, improved underground pipe curtain bearing structure's whole support intensity.

6. The utility model provides an underground pipe curtain bearing structure, above-mentioned second pipe canopy links to each other with first pipe canopy welding to can link together first pipe canopy and second pipe canopy simple and fast ground, make things convenient for the staff construction.

7. The utility model provides an underground pipe curtain bearing structure, second pipe canopy be with first pipe canopy shape looks adaptation, the wavy support canopy that the domes that constitute that set up by a plurality of orientation underground accommodation space tops, the second pipe canopy has the orientation and keeps away from the bulge that underground accommodation space top extends, its extension of first pipe canopy links to each other with the bulge. The wavy second pipe shed can bear larger pressure and improve the supporting strength. Moreover, the wavy supporting shed formed by the plurality of arched structures can effectively enable the first pipe shed and the second pipe shed to be firmly connected together towards the extending part, the protruding part of the second pipe shed is used for bearing the first pipe shed, so that the second pipe shed can have larger deformation allowance, and the supporting capacity of the second pipe shed to the first pipe shed is further improved.

8. The utility model provides an underground pipe curtain bearing structure, first pipe curtain steel pipe pass through the hasp structure and link to each other, and second pipe curtain steel pipe passes through the hasp structure and links to each other. Make first pipe canopy and second pipe canopy when guaranteeing joint strength, install convenient and fast more.

9. The utility model provides an underground pipe curtain bearing structure, hasp structure are triangle-shaped's angle connector including setting up in first pipe curtain steel pipe and/or second pipe curtain steel pipe both sides and cross section, and its two opposite phase lock joint of adjacent angle connector links to each other. Through above-mentioned angle steel can link together a plurality of first pipe curtain steel pipes firmly swiftly, perhaps link together a plurality of second pipe curtain steel pipes.

10. The utility model provides an underground pipe curtain bearing structure is provided with on first pipe curtain steel pipe and/or the second pipe curtain steel pipe and supplies thick liquid to get into its inside slip casting hole, and first pipe canopy and/or second pipe canopy pass through the thick liquid reinforcement and seal. The slurry can effectively fill the space between the steel pipe and the lock catch structure, the integrity of the steel pipe and the lock catch structure is improved, and the supporting strength of the underground pipe curtain supporting structure is further improved.

11. The utility model provides a guide tunnel water storage system, a first pipe shed is fixedly connected with the inner wall of a regulation and storage pool and/or fixedly connected with a grid which is arranged in the regulation and storage pool and used for reinforcing the regulation and storage pool; the second pipe shed is fixed continuous and/or is fixed continuous with the grid that is used for consolidating the regulation pond in the regulation pond with the inner wall of regulation pond. Thereby firmly and reliably fixing the first pipe shed and the second pipe shed in the storage tank.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a guide tunnel water storage system provided by the present invention;

fig. 2 is a schematic view of a partially enlarged connection structure of the first pipe shed and the second pipe shed and the storage tank provided by the present invention;

fig. 3 is a schematic view of a connection structure between the first pipe shed and the second pipe shed and the storage regulation pool provided by the present invention;

fig. 4 is a schematic structural view of a first tube curtain steel tube provided by the present invention;

fig. 5 is a schematic structural view of the pipe curtain steel pipes provided by the present invention connected by the first type of connecting angle steel;

fig. 6 is a schematic structural view of the pipe curtain steel pipes connected by the second type of connecting angle steel;

FIG. 7 is a flow chart of the construction of the underground pipe curtain support structure provided by the present invention;

fig. 8 is the utility model provides an advance little pipe slip casting construction flow chart.

Description of reference numerals:

1-a first pipe shed; 2-underground accommodating space; 3-a first tube curtain steel tube; 4-a second pipe shed; 5-a second tube curtain steel tube; 6-an extension; 7-a projection; 8-connecting angle steel; 9-guiding the hole; 10-grouting holes; 11-shaft.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The water storage system with the guide tunnel provided by the embodiment, as shown in fig. 1, includes:

the underground pipe curtain supporting structure is used for ensuring the rigidity of a soil body above the pipe curtain and effectively reducing upward propagation of formation deformation;

a regulating reservoir for storing water and a vertical shaft 11 are formed by a plurality of guide holes 9.

As shown in fig. 1 and 2, the underground pipe curtain support structure includes:

first pipe shed 1 sets up in secret accommodation space 2 for support secret accommodation space 2, first pipe shed 1 includes a plurality of first pipe curtain steel pipes 3, and its lateral wall cooperation of adjacent first pipe curtain steel pipe 3 links to each other, and first pipe shed 1 is the wavy support canopy that constitutes by a plurality of domes towards 2 top settings in secret accommodation space. Thereby make the pipe canopy low-angle raise effectively through setting up wavy pipe canopy, both can support underground accommodation space effectively, when still having avoided being the domes of a great radian among the prior art with the pipe canopy, the top of its domes need accept great pressure and lead to the problem that current pipe canopy supports the intensity low. Moreover, the problem that a large space needs to be dug out at the middle protruding position of the arch structure of the pipe shed with a single arch structure, and the construction difficulty is high is solved. A plurality of domes in this application can receive pipe curtain top soil body under the pipe curtain top soil body pressure effect at underground pipe curtain bearing structure and take place the small-amplitude deformation thereby support the pipe curtain top soil body, reduce the stratum simultaneously effectively and warp and upwards propagate, guarantee underground construction safety. First pipe curtain steel pipe 3 links to each other through the hasp structure, and the hasp structure is including setting up at first pipe curtain steel pipe 3 and 5 both sides of second pipe curtain steel pipe and cross section for triangular angle connector 8, and its two looks lock joint of adjacent angle connector 8 links to each other. As shown in fig. 6, two adjacent connected angle steels 8 are in an L shape, one side edge of one angle steel 8 is on the same plane with the first pipe shed 1, and the two connected angle steels 8 are vertically connected in a clamping manner;

the second pipe shed 4 is arranged below the first pipe shed 1 as shown in fig. 1 to 3, the second pipe shed 4 comprises a plurality of second pipe curtain steel pipes 5, and the side walls of the adjacent second pipe curtain steel pipes 5 are matched and connected. Above-mentioned first pipe shed 1 and second pipe shed 4 combined action support secret accommodation space 2, leak the clearance back between its a plurality of first pipe curtain steel pipes 3 of first pipe shed 1 as soil, second pipe shed 4 can support the soil body of leaking, guarantees secret accommodation space 2's structural strength to guarantee the rigidity of its pipe curtain top soil body, and reduce the stratum deformation effectively and upwards propagate. The diameter of the second pipe curtain steel pipe 5 is smaller than that of the first pipe curtain steel pipe 3, so that the gap between the second pipe curtain steel pipes 5 adjacent to the second pipe shed 4 is smaller than that between the second pipe curtain steel pipes 5 adjacent to the first pipe shed 1. The second pipe shed 4 can support the soil leaking from the gap of the first pipe shed 1, and the structural strength of the underground accommodating space 2 is ensured. Moreover, second pipe canopy 4 links to each other with first pipe canopy 1 cooperation, and at least one in its a plurality of domes of first pipe canopy 1 has the extension 6 of keeping away from underground accommodation space 2 direction extension, and extension 6 links to each other with second pipe canopy 4 cooperation. Second pipe canopy 4 is for supporting the canopy with first pipe canopy 1 shape looks adaptation, and the wavy of the domes that constitute of the domes that a plurality of orientation underground accommodation space 2 tops set up has the bulge 7 of extending towards keeping away from underground accommodation space 2 tops, and its extension 6 of first pipe canopy 1 links to each other with bulge 7. The second pipe shed 4 is connected with the first pipe shed 1 in a matched mode, so that the second pipe shed and the first pipe shed can jointly support the underground accommodating space 2 and share pressure brought by the top of the underground accommodating space 2. For two first pipe sheds 1 and the second pipe shed 4 that set up alone, avoid appearing first pipe shed 1 and bear the danger that the structure is not hard up or even collapses easily when great pressure alone, make second pipe shed 4 undertake partial pressure for first pipe shed 1 in this application, reduced first pipe shed 1's pressure effectively, improved underground pipe curtain bearing structure's whole support intensity. Moreover, the second pipe shed 4 can not only bear larger pressure, but also improve the supporting strength. Moreover, the wave-shaped supporting shed formed by a plurality of arch structures can effectively lead the first pipe shed 1 and the second pipe shed 4 to be firmly connected together towards the extending part 6, and the second pipe shed 4 can have larger deformation allowance by bearing the first pipe shed 1 through the convex part of the second pipe shed 4, thereby further improving the supporting capacity of the second pipe shed 4 to the first pipe shed 1. Second pipe shed 4 links to each other with first pipe shed 1 welding, thereby can link together first pipe shed 1 and second pipe shed 4 simple and fast ground through the mode that above-mentioned welding links to each other, makes things convenient for the staff to be under construction. In this embodiment, the locking structure includes the angle connector 8 that sets up at second pipe curtain steel pipe 5 both sides and cross section for triangle-shaped, and its two looks lock joint of adjacent angle connector 8 are continuous. As shown in fig. 5, the angle steel 8 is V-shaped, the opening position of the "V" is on the same plane as the second pipe shed 4, and the two connected angle steels 8 are connected to each other in an inserting manner; the first pipe curtain steel pipe 3 and the second pipe curtain steel pipe 5 are connected through a locking structure. Make first pipe canopy 1 and second pipe canopy 4 when guaranteeing joint strength, the installation is convenient and fast more. And, can link together a plurality of first tube curtain steel pipes 3 firmly and swiftly through above-mentioned angle steel 8, or link together a plurality of second tube curtain steel pipes 5. As shown in fig. 4, the first pipe-curtain steel pipe 3 and the second pipe-curtain steel pipe 5 are provided with grouting holes 10 for allowing a slurry to enter the interiors thereof, and the first pipe shed 1 and/or the second pipe shed 4 are reinforced and sealed by the slurry. The slurry can effectively fill the space between the steel pipe and the lock catch structure, the integrity of the steel pipe and the lock catch structure is improved, and the supporting strength of the underground pipe curtain supporting structure is further improved. In this embodiment, the lower surface of the second pipe shed 4 is attached to the top of the guide hole 9, so that the guide hole water storage system is more effectively protected by the second pipe shed 4.

In this embodiment, one end of the first pipe shed 1 is fixedly connected with the wall of the shaft 11, and the other end is fixedly connected with the inner wall of the storage tank. Wherein one end of second pipe canopy 4 links to each other with the inner wall of regulation pond is fixed, and the other end links to each other with the grid that is used for consolidating the regulation pond is fixed to firmly fix first pipe canopy 1 and second pipe canopy 4 in the regulation pond reliably.

Of course, the utility model discloses whether the application links to each other not do specific restriction to first pipe canopy 1 and second pipe canopy 4, in other embodiments, first pipe canopy 1 and second pipe canopy 4 are installed alone respectively in the regulation pond.

Of course, the utility model discloses the application does not do specific restriction to the connected mode between the two of first pipe canopy 1 and second pipe canopy 4, and in other embodiments, first pipe canopy 1 and second pipe canopy 4 pass through the connecting rod and fixedly link to each other.

Of course, the application of the present invention is not limited to the connection manner between the first pipe shed 1 and the second pipe shed 4, and in other embodiments, the plurality of first pipe curtain steel pipes 3 may be connected together by the V-shaped connecting angle 8 shown in fig. 5; the second plurality of steel tube sheets 5 may also be connected together by "L-shaped" connecting angles 8 as shown in fig. 6.

Of course, the utility model discloses whether the application is laminated with the top of pilot tunnel 9 mutually to the lower surface of second pipe canopy 4 does not do specific restriction, in other embodiments, has the clearance between second pipe canopy 4 and the pilot tunnel 9 top.

In the in-process of this embodiment construction pilot tunnel retaining system, the pipe curtain steel pipe includes first pipe curtain steel pipe 3 and second pipe curtain steel pipe 5, need adopt diameter 300 mm's pipe curtain steel pipe at the hunch portion before digging the pump station excavation in the work progress, forms steel pipe curtain with the horizontal lock joint of hasp between the pipe and the pipe, then secretly digs under the protection of pipe curtain. The pipe curtain is constructed by adopting a method of monitoring the jacking of the spiral unearthed outer pipe in the pipe by a light source. The pipe curtain steel pipe is constructed along an arch structure in the circumferential direction of 150mm outside the excavation contour line of the underground excavation structure, the pipe curtain steel pipe is constructed along the axial direction of the underground excavation structure, the average inlet angle is raised by 0.2%, and the deviation of the construction tail end of the pipe curtain steel pipe is controlled within +/-50 mm; the pipe curtain steel pipe is constructed in a steel flower pipe mode, holes are drilled between the male and female buckling grooves at intervals of 200mm, and the hole diameter is not smaller than

And cement slurry is injected through the pipe orifice grouting holes to fill the space between the inner part of the pipe curtain steel pipe and the lock catches, so that the integrity of the pipe curtain steel pipe and the lock catches is improved.

The construction process of underground pipe curtain bearing structure in this application is shown in fig. 7, and it includes:

① rig installation

After entering a field, a drilling machine needs to be installed in a working well; firstly, a drilling machine support frame and a movable frame are erected, back wall excavation and casting can be synchronously carried out, and a vertical shaft grating wall body can be adopted as the back reaction wall of the project; the motors of the driving mechanisms are connected for power distribution and hydraulic pipeline connection, so that supporting facilities for construction are perfected;

② rig commissioning

Debugging whether each operation part is flexible or not and whether the power distribution device is flexible and effective or not; the tightness of a hydraulic pipeline and the reliability of system pressure are debugged; comprehensively carry out the linkage test of equipment movement, feeding, returning, rotation and drilling tools to ensure that all parameters are normal

③ drilling machine is in place and angle is adjusted

Determining and marking an extension track of the jacking steel pipe in the vertical shaft or the tunnel, and moving the drilling machine to the position of the construction hole; aligning the center of the spiral drill to a hole position, and adjusting the vertical elevation angle to the design requirement to be measured by using a horizontal ruler or an inclinometer; adjusting the azimuth angle, measuring the distance from two ends of a pipe curtain steel pipe installed on the drilling machine to the central axis, and horizontally moving the position of the drilling machine to meet the requirement of design deviation; installing an angle detection rod, verifying the measurement data of the level ruler, and calculating an error value;

④ steel tube lock catch processing

Manufacturing a lock catch welding tool, determining the lock catch position of the steel pipe according to the radian of the construction arch ring, and performing positioning welding in a tool die; the steel pipe lock catch at the special position is processed separately, and is positioned and marked according to the actual corner position and angle; drilling holes among the steel pipe lock catches according to the design construction requirement,

⑤ pushing in and out soil to correct angle

After hole positions are checked and angle adjustment is completed, starting a drilling machine to propel, and jacking the construction pipe curtain steel pipe into the soil; checking the construction angle again, and starting the rotary screw after confirmation; drilling at constant speed, observing data change of the angle detection rod, and performing construction data measurement and adjustment again after jacking to a preset depth of soil;

⑥ circulation feeding pipe

The construction generally adopts a pipe curtain steel pipe, the project is limited by space, and the pipe curtain steel pipe is processed into 3 meters per section; machining the end face into a flat end port by using a circular tube cutting machine; welding two sections of pipe curtain steel pipes firmly by adopting electric arc welding on site, and continuing construction according to a jacking flow;

⑦ Angle monitoring, tracking and correcting

⑧, completing the jacking, pulling out the auger stem, and sealing the orifice;

⑨, shifting, and constructing the next one;

⑩ hole sealing grouting

The engineering pipe curtain steel pipe is filled with single cement slurry, a steel plate is welded at an inlet of the pipe curtain steel pipe to seal a pipe orifice, and 2 grouting holes and 1 air hole are reserved on a sealing plate; the air holes are arranged at the upper part of the tube curtain steel tube and connected with an observation tube with the height of 1 meter, and the lock catch orifices are sealed by adopting a curing agent and are reserved with observation holes. Injecting cement slurry from the grouting holes to the tail end of the pipe curtain steel pipe, discharging the slurry from the vent pipe after the pipe curtain steel pipe is filled, closing a valve of the vent pipe, performing supplementary grouting under a certain pressure condition, enabling the slurry to overflow from the grouting holes between the steel pipe lock catches, and filling lock catch spaces on the outer side of the pipe curtain steel pipe; the pressure gauge of the grouting pump must be reliable and sensitive to ensure the filling of the pipe and the full grout. After the primary grouting is finished, secondary grouting in the pipe can be performed after 24 hours according to the requirement;

wherein, the application also adopts an advanced small conduit grouting construction method, as shown in fig. 8, the method is as follows:

processing and manufacturing a guide pipe: the advanced small guide pipe adopts a steel pipe, the front end of the steel pipe is in a pointed cone shape, a reinforcing steel bar ring rib is welded at the tail part of the steel pipe, the tail end of the steel pipe is arranged at the belly of the steel grating, the small guide pipe is manufactured into a perforated pipe and is used for grouting to the stratum, the small guide pipe is arranged in a quincunx shape so as to prevent dead angles from occurring in grouting, no hole is drilled in the tail part range so as to prevent slurry leakage, and a ring-shaped hoop rib is welded at the tail end so as to prevent the.

Installing a small guide pipe: the small guide pipe adopts a high-pressure air gun to blow holes or an electric drill to drill holes, a pneumatic hammer is used for vibrating during pipe insertion, and a grouting pump is adopted for grouting. The grouting material is selected according to the stratum, and the grouting pressure is determined according to the field test. The grouting material, grouting mode and proportion are also adjusted according to the on-site stratum condition.

Selecting and preparing slurry and grouting: according to the design requirement, the grouting slurry adopts single slurry or double slurry.

Preparing slurry

A. Preparation of cement paste

a, calculating the required dosage of cement, water and retarder according to the water-cement ratio and the doping amount of the retarder according to the volume of the prepared cement paste.

b, according to the using amount, firstly adding water and the retarder into a container, strongly stirring, adding cement after the retarder is fully dissolved, strongly stirring, and uniformly mixing.

The gel time is determined according to actual conditions.

Grouting process and equipment

After the grouting pipes are connected, before grouting, a water pressing test pipeline is firstly opened, then the prepared grout is put into a grout storage barrel of a grouting pump, the grouting pump is started, and the grout is pressed into a soil body through a small guide pipe through a gate valve.

The key technical measures of grouting are as follows:

strictly controlling the mixing proportion and the gel time, after the mixing proportion is initially selected, controlling and adjusting the mixing proportion by using the gel time, measuring the strength of a grouting concretion body, and selecting the optimal mixing proportion.

In the grouting process, the grouting pressure is strictly controlled, the final grouting pressure must meet the design requirement, the pressure is stabilized, the permeation range of the grout is ensured, and the abnormal phenomena that the underground structure and the ground building are endangered due to structural deformation and grout stringing are prevented. Tracking and monitoring in the grouting process, and immediately taking the following measures when an abnormal phenomenon occurs:

① reducing the grouting pressure or using interstitial grouting.

② change the grouting material or shorten the grout gel time.

③ the slip casting embodiment was adjusted.

④ when slurry flows out from other holes, it can be injected by multiple grouting machines simultaneously or plugged by beating the holes, when the pipe is injected, the plug is pulled out, the foreign matter in the pipe is removed by iron wire or thin steel bar, and the pipe is flushed by high-pressure wind or water without need of this process, then grouting is carried out.

⑤ the grouting amount is large, the pressure does not rise for a long time, the concentration and the mixing ratio of the grout should be adjusted to shorten the gelling time, and small-pump-amount low-pressure grouting or intermittent grouting is carried out to ensure that the grout has relative residence time in the cracks so as to be gelled, but the residence time cannot exceed the gelling time of the mixed grout.

And (3) grouting effect inspection: because the grouting method is peripheral single-row consolidation grouting, the consolidation thickness is checked after excavating the pilot tunnel, if the requirement cannot be met, the mixing proportion is adjusted in time, and the grouting process is improved.

In order to prevent slurry leakage from the orifice, a hemp rope, cement and a little water glass are used for blocking the gap between the drill hole and the perforated pipe at the tail end of the conduit.

The grouting pipe and the guide pipe are connected by adopting a movable joint, so that the quick assembly and disassembly are ensured.

The grouting sequence is symmetrically performed from two sides to the middle, and the grouting is performed hole by hole from bottom to top.

After the movable joint is disassembled, the flower tube mouth is quickly sealed by cement medicine rolls, and the outflow of slurry which is not coagulated is prevented.

And (4) sampling and checking the underground water periodically during the grouting period, and taking measures if pollution exists.

And recording by a specially-assigned person in the grouting process, and inspecting the grouting effect after the grouting is finished, so that unqualified persons can perform supplementary grouting.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (11)

1. An underground pipe curtain support structure, comprising:

first pipe canopy (1) sets up in secret accommodation space (2), is used for supporting secret accommodation space (2), first pipe canopy (1) includes a plurality of first pipe curtain steel pipe (3), and is adjacent its lateral wall cooperation of first pipe curtain steel pipe (3) links to each other, first pipe canopy (1) is by a plurality of orientations the wavy support canopy that the domes that underground accommodation space (2) top set up constitute.

2. The underground pipe curtain support structure of claim 1, comprising a second pipe shed (4) arranged below the first pipe shed (1), wherein the second pipe shed (4) comprises a plurality of second pipe curtain steel pipes (5), and the side walls of the adjacent second pipe curtain steel pipes (5) are matched and connected.

3. The underground pipe curtain support structure according to claim 2, wherein the second pipe curtain steel pipe (5) has a smaller diameter than the first pipe curtain steel pipe (3).

4. The underground pipe curtain support structure of claim 2, wherein the second pipe shed (4) is connected to the first pipe shed (1) in a fitting manner.

5. The underground pipe curtain support structure of claim 4, wherein at least one of the plurality of arches of the first pipe shed (1) has an extension (6) extending away from the underground receiving space (2), the extension (6) being cooperatively connected to the second pipe shed (4).

6. The underground pipe curtain support structure of claim 4, wherein the second pipe shed (4) is welded to the first pipe shed (1).

7. The underground pipe curtain support structure according to claim 5, wherein the second pipe shed (4) is a wave-shaped support shed which is matched with the first pipe shed (1) in shape and is composed of a plurality of arch structures arranged towards the top of the underground accommodating space (2), the second pipe shed (4) is provided with a protruding part (7) extending towards the top of the underground accommodating space (2), and the extending part (6) of the first pipe shed (1) is connected with the protruding part (7).

8. The underground pipe curtain support structure of claim 2, wherein the first pipe curtain steel pipes (3) are connected by a locking structure and/or the second pipe curtain steel pipes (5) are connected by a locking structure.

9. The underground pipe curtain support structure of claim 8, wherein the locking structure comprises connecting angle steels (8) with triangular cross sections, which are arranged on two sides of the first pipe curtain steel pipe (3) and/or the second pipe curtain steel pipe (5), and the adjacent connecting angle steels (8) are connected in a buckling manner in opposite directions.

10. A pilot tunnel water storage system, comprising:

the underground veiling support structure of any one of claims 2-8, and

the regulating and storing pool for storing water is formed by a plurality of guide holes (9).

11. A guide tunnel water storage system according to claim 10, wherein the first pipe shed (1) is fixedly connected with the inner wall of the storage tank and/or with a grid arranged in the storage tank for reinforcing the storage tank; and/or the second pipe shed (4) is fixedly connected with the inner wall of the storage adjusting pool and/or is fixedly connected with a grid which is arranged in the storage adjusting pool and used for reinforcing the storage adjusting pool.

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