CN115573390A - Full life cycle waterproof system of single wall prefabricated construction of underground works - Google Patents

Abstract

The invention provides a full-life-cycle waterproof system of a single wall prefabricated structure of an underground engineering, wherein a single wall prefabricated structure is formed by a cast-in-place concrete structure and a prefabricated underground diaphragm wall, the single wall prefabricated structure is provided with a vertical joint and a horizontal construction joint, a water stop strip bag and a waterproof structure are sealed by two joints filled with liquid after passing through the vertical joint, a grouting pipe and two water stop adhesive tapes are pre-buried in the horizontal construction joint, grouting is carried out once after construction is finished, and when the construction joint is opened and leaks due to structural deformation in an operation period, grouting and water stop can be carried out in time in a full-life cycle. The invention establishes the self-waterproofing of the underground continuous wall and the cast-in-place reinforced concrete structure based on the principle that the waterproof design of the underground structure follows 'mainly defense, rigid-flexible combination, multiple defense lines, adaptation to local conditions and comprehensive treatment', and forms a waterproof system with the whole life cycle from the construction stage to the operation stage by attaching the waterproof structure of the vertical joints of the prefabricated single wall structure, the prefabricated single wall and the cast-in-place plate construction joints of each layer of the structure and the measures of the repeatable grouting pipes.

Description

Full life cycle waterproof system of single wall prefabricated construction of underground works

Technical Field

The invention relates to the field of underground engineering, in particular to a full-life-cycle waterproof system of a single-wall prefabricated structure of underground engineering.

Background

At present, china is greatly promoting prefabricated structures, and the prefabricated structures are concrete structures formed by using prefabricated components as main components through assembly, connection and partial cast-in-place. The method has the advantages of batch production, uniform quality, short construction period, high construction precision, low construction cost and the like. The building industrialization can not only improve the construction efficiency and the construction quality, but also shorten the construction period and reduce the cost.

The underground engineering is underground, a large amount of underground water is contained in a soil layer or surface water flows into the underground, when the prefabricated components are assembled, connected and partially cast in place to form a concrete structure, seams exist between the prefabricated structural components and between the prefabricated components and the cast-in-place components, so that the underground water has the risk of permeating into the structure, the normal use of the structure in construction safety and operation period is ensured, and the problem that waterproof seams are the key point for treating the prefabricated structure is solved.

Therefore, the development of a full-life-cycle waterproof system of a single-wall prefabricated structure in underground engineering is an urgent problem to be solved.

Disclosure of Invention

In view of the above, the present invention provides a full life cycle waterproof system for a single wall prefabricated structure in an underground construction, which provides an effective method for solving the problems of water resistance of joints in a construction stage and an operation period, and can become a mode of a future waterproof system for an underground structure.

In order to solve the technical problems, the invention adopts the technical scheme that:

a single-wall prefabricated structure full-life-cycle waterproof system for underground engineering comprises a cast-in-place concrete structure and prefabricated underground diaphragm walls, wherein the cast-in-place concrete structure comprises a cast-in-place top plate, a cast-in-place middle plate and a cast-in-place bottom plate, and the cast-in-place top plate, the cast-in-place middle plate, the cast-in-place bottom plate and the two prefabricated underground diaphragm walls form a single-wall prefabricated structure; a top plate outer waterproof layer is arranged at the top of the cast-in-place top plate, and a bottom plate outer waterproof layer is arranged at the bottom of the cast-in-place bottom plate; during construction, a vertical joint exists between the prefabricated diaphragm walls of two adjacent single-wall prefabricated structures, and a horizontal construction joint exists between the prefabricated diaphragm walls of the single-wall prefabricated structures and a cast-in-place concrete structure;

the two adjacent prefabricated ground connecting walls are assembled through inter-wall connector components, a group of water stop strip bag components are respectively arranged on two sides of the inter-wall connector components between vertical seams of the two adjacent prefabricated ground connecting walls, each water stop strip bag component comprises a water stop strip bag which is stuck in grooves of the inner side strip bag and the outer side strip bag of the two adjacent prefabricated ground connecting walls, low-density polyurethane slurry is injected into the water stop strip bags through a slurry injection pump after the prefabricated ground connecting walls are completely assembled in place, so that the water stop strip bags are extruded and closely attached, and a waterproof structure is further arranged on the vertical seams;

prefabricated ground is pasted even horizontal construction joint position of wall has twice stagnant water adhesive tape pre-buried between the twice stagnant water adhesive tape has the slip casting pipe, the slip casting pipe is fixed on prefabricated ground is even the wall, it has a plurality of slip casting branch pipes to connect on the slip casting pipe, treats that cast in situ concrete structure finishes to carry out pressure slip casting, filling horizontal construction joint. And grouting once after the construction is finished, and grouting and water stopping can be performed in time in a whole life cycle when the construction joint is opened and leaked due to structural deformation in the operation period.

Furthermore, the waterproof structure comprises embedded angle steel and a water stop steel plate, the embedded angle steel is arranged on the inner side of a vertical joint of two adjacent prefabricated underground diaphragm walls, the water stop steel plate is welded on the embedded angle steel of the two prefabricated underground diaphragm walls in the excavation process of the foundation pit, the whole vertical joint of the prefabricated underground diaphragm walls is sealed from the inner side, and the vertical joint is waterproof by four defense lines which are formed by a water stop strip bag filled with liquid at the outer side, cement slurry filled in the middle, a water stop strip bag filled with liquid at the inner side and a water stop steel plate sealed by welding.

Furthermore, the waterproof structure comprises a post-pouring buttress column, water-stop adhesive tapes and grouting pipes, wherein the two sides of the vertical joint on the back surface of the prefabricated underground diaphragm wall are respectively adhered with one water-stop adhesive tape, the grouting pipes are pre-embedded between the two water-stop adhesive tapes, and the post-pouring buttress column is arranged at the vertical joint on the back surface of the prefabricated underground diaphragm wall. The vertical seam is waterproof by adopting four defense lines consisting of a water stop strip bag filled with liquid at the outer side, cement slurry filled in the middle, a water stop strip bag filled with liquid at the inner side and a post-pouring buttress.

Furthermore, two water stop adhesive tapes are arranged at the vertical construction joint of the prefabricated diaphragm wall and the post-cast buttress column, and the grouting pipe is positioned at the vertical joint of the back surface of the prefabricated diaphragm wall.

Further, connector component includes connector, T type connector between the C type width of cloth between the width of cloth, connector between the T type width of cloth include T type component and set up in the slip casting pipe of T type component front end be equipped with the slip casting hole on the slip casting pipe of T type component front end, will connector inserts connector between the C type width of cloth between the T type width of cloth, and the back slip casting is carried out in the connector between the C type width of cloth after the construction finishes, accomplishes assembling of two adjacent prefabricated ground even walls.

Furthermore, the connector between the C-shaped panels is arranged at a tenon formed in one prefabricated diaphragm wall along the thickness direction, the connector between the T-shaped panels is arranged at a tenon formed in the other prefabricated diaphragm wall along the thickness direction, and the connector between the C-shaped panels and the connector between the T-shaped panels are arranged oppositely.

Furthermore, when the prefabricated underground diaphragm wall is constructed, two vertically adjacent prefabricated underground diaphragm walls are butted in a tenon-tenon mode.

Furthermore, the position of a horizontal construction joint of the prefabricated underground diaphragm wall is subjected to surface rough surface treatment in advance, and then two water stop adhesive tapes are pasted.

Furthermore, fixing clamps are arranged on the grouting pipes every 0.5 m, the grouting pipes are nailed on the prefabricated ground connecting wall through shooting nails, and the end parts of the grouting pipes are sealed by sealing pipes.

Furthermore, the grouting branch pipes are connected to the grouting pipes every 4-5 meters.

Compared with the prior art, the full-life-cycle waterproof system of the underground engineering single-wall prefabricated structure has the following advantages:

(1) The invention adopts a construction joint of a prefabricated single wall and each layer of cast-in-place slab of the structure to arrange an embedded grouting pipe and a water stop adhesive tape with a whole life cycle for water prevention, and forms a waterproof system with a whole life cycle on the basis of outer waterproof layers outside a top plate and a bottom plate and self-waterproofing based on structural concrete.

(2) The single wall prefabricated structure and the joint part waterproof whole form totally-enclosed waterproof, and the waterproof effect is good; in addition, grouting pipes arranged at the construction joint can be repeatedly grouted in the construction period and the service life, so that water stop of the joint of the structure in the whole life cycle is realized, normal and safe use of the structure is guaranteed, and popularization and application of the underground assembled structure are further promoted.

(3) The invention starts from the principle that the waterproof design of an underground structure should follow 'mainly prevention, rigid-flexible combination, multiple defense lines, adaptation to local conditions and comprehensive treatment', establishes the waterproof structure of the underground continuous wall and the cast-in-place reinforced concrete structure and the additional prefabricated single wall structure vertical joints, the prefabricated single wall and the cast-in-place plate construction joints of all layers of the structure and the measures of the repeatable grouting pipes, forms a waterproof system with the whole life cycle from the construction stage to the operation stage, and can ensure that the prefabricated components are applied to the regions with abundant underground water.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic cross-sectional view of a prefabricated diaphragm wall of the present invention with buttress posts installed in the perps;

FIG. 2 is a schematic longitudinal cross-sectional view of a buttress mount installed in a perps of the prefabricated diaphragm wall of the present invention;

FIG. 3 is a top view of the prefabricated wall panel of the present invention with the waterproof buttress installed in the perps;

FIG. 4 is a schematic cross-sectional view of a water stop steel plate installed in the perps of the prefabricated diaphragm wall according to the present invention;

FIG. 5 is a schematic view of a longitudinal section of the prefabricated diaphragm wall with water stop steel plates in the vertical seams;

FIG. 6 is a top view of the prefabricated diaphragm wall with water-stop steel plates in the vertical seams;

FIG. 7 is a detailed view of each node in FIGS. 1, 3, 4 and 6;

FIG. 8 is a schematic diagram of the arrangement of a water-stop rubber strip and a grouting pipe in the invention;

FIG. 9 is a cross-sectional view of a prior art single wall precast structure;

fig. 10 is a longitudinal sectional view of a prior art single wall precast structure.

Description of the reference numerals:

1. a crown beam; 2. casting a top plate in situ; 3. casting a middle plate in situ; 4. casting a bottom plate in situ; 5. prefabricating a diaphragm wall; 6. vertically sewing; 7. horizontal construction joints; 8. a waterproof layer on the outer side of the bottom plate; 9. a waterproof layer on the outer side of the top plate; 10. a water stopping rubber strip; 11. embedding a grouting pipe; 12. post-pouring buttress columns; 13. a water stop steel plate; 14. a water stop strip bag; 15-1, a C-type inter-web connector; 15-2, a T-shaped inter-web connector; 15-3, grouting pipes; 15-4, grouting holes; 16. embedding angle steel in advance; 17. fixing the clamp; 18. shooting a nail; 19. sealing the tube; 20. a cement slurry.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1:

the invention provides a full-life-cycle waterproof system of a single-wall prefabricated structure of underground engineering, which comprises a cast-in-place concrete structure, a prefabricated underground diaphragm wall 5, a bottom plate outer side waterproof layer 8, a top plate outer side waterproof layer 9, a water stop adhesive tape 10, an embedded grouting pipe 11, a post-cast buttress column 12, a water stop steel plate 13, a water stop strip bag 14, an inter-width connector component, embedded angle steel 16, a fixing clamp 17, a shooting nail 18, a sealing pipe 19 and the like, as shown in figures 1 to 8. The cast-in-place concrete structure comprises a cast-in-place top plate 2, a cast-in-place middle plate 3 and a cast-in-place bottom plate 4, and the connector components between the beams comprise connectors between C-shaped beams and connectors between T-shaped beams. The cast-in-place roof 2, the cast-in-place middle plate 3, the cast-in-place bottom plate 4 and the prefabricated diaphragm wall 5 form a single wall prefabricated structure, and vertical seams 6 are formed among the prefabricated diaphragm walls 5 of the single wall prefabricated structure; horizontal construction joints 7 exist between the prefabricated diaphragm wall 5 of the single-wall prefabricated structure and the cast-in-place top plate 2, between the cast-in-place middle plate 3 and between the prefabricated diaphragm wall 4.

In this embodiment, as shown in a node B in fig. 7, the prefabricated structure full-life-cycle waterproof system of the single wall in the underground engineering is vertically butted in a tenon-tenon manner in the construction process of the prefabricated underground diaphragm wall 5. The connector component between the webs comprises a connector 15-1 between C-shaped webs and a connector 15-2 between T-shaped webs, wherein the connector 15-1 between the C-shaped webs is arranged at a tenon formed in one prefabricated ground connecting wall along the thickness direction, the connector 15-2 between the T-shaped webs is arranged at a tenon formed in the other prefabricated ground connecting wall along the thickness direction, and the connector 15-1 between the C-shaped webs and the connector 15-2 between the T-shaped webs are arranged oppositely. The T-shaped inter-web connector 15-2 comprises a T-shaped component and a grouting pipe 15-3 arranged at the front end of the T-shaped component, a grouting hole 15-4 is formed in the grouting pipe 15-3 at the front end of the T-shaped inter-web connector 15-2, the T-shaped inter-web connector 15-2 is inserted into the C-shaped inter-web connector 15-1, grouting is performed in the C-shaped inter-web connector 15-1 after construction is finished, and assembling of two adjacent prefabricated grounding connecting walls 5 is completed. The C-shaped inter-spoke connector 15-1 is used for connecting the prefabricated diaphragm wall 5, and after construction is finished, grouting is carried out through a grouting pipe 15-3 of the T-shaped inter-spoke connector 15-2, so that a water stopping effect is achieved.

In this embodiment, a single-wall prefabricated structure full-life-cycle waterproof system for underground engineering, as shown by a node a in fig. 7, before the prefabricated diaphragm wall component is assembled, the water-stop strip bags 14 are adhered to the inside and outside strip bag grooves of the wall panel, and after the prefabricated diaphragm wall 5 is completely assembled in place, low-density polyurethane slurry is injected into the water-stop strip bags 14, so that the water-stop strip bags 14 are extruded and tightly adhered.

In the embodiment, as shown by a node D in fig. 7, angle steel 16 is embedded inside a vertical joint 6 structure of a prefabricated underground diaphragm wall 5, a water stop steel plate 13 is welded on the embedded angle steel 16 of two prefabricated underground diaphragm walls 5 in the excavation process of a foundation pit, and the whole vertical joint 6 of the prefabricated underground diaphragm wall is sealed from the inner side, so that the vertical joint water prevention formed by four defense lines including an outer liquid-filled water stop bar bag 14, middle-filled cement slurry, an inner liquid-filled water stop bar bag 14 and the welded and sealed water stop steel plate 13 is formed. As shown in fig. 4, the horizontal construction joint 7 between the cast-in-place roof 2, the cast-in-place middle plate 3, the cast-in-place bottom plate 4 and the prefabricated diaphragm wall 5 is roughened in advance, and two water-stop adhesive tapes 10 are adhered to the surface of the prefabricated diaphragm wall 5. As shown in fig. 8, a grouting pipe 11 is pre-buried between two water-stop rubber strips 10, fixing clamps 17 are arranged every 0.5 m on the grouting pipe 11, the grouting pipe is nailed on the prefabricated underground diaphragm wall 5 by using a shooting nail 18, and the end part of the grouting pipe 11 is sealed by a sealing pipe 19. And the grouting pipes 11 are connected with grouting branch pipes every 4-5 meters, pressure grouting is carried out after the construction of the cast-in-place concrete structure is finished, and the horizontal construction joints 7 are filled. And grouting once after the construction is finished, and grouting and water stopping can be performed in time in a whole life cycle when the construction joint is opened and leaked due to structural deformation in the operation period.

Example 2:

in this embodiment, as shown in fig. 1 and 3, the waterproof system for the underground engineering single-wall prefabricated structure with the full life cycle may be a waterproof system for a vertical seam, which is composed of four defense lines, namely, an outside liquid-filled water stop strip bag 14, a middle-filled cement slurry, an inside liquid-filled water stop strip bag 14 and a post-cast buttress post 12. The post-cast concrete buttress columns on the inner sides of the vertical seam structures can also block the vertical seams on the inner sides among the prefabricated parts. The method comprises the steps of roughening the surface of a horizontal construction joint 7 between a cast-in-place concrete structure and a prefabricated underground diaphragm wall 5 and a vertical construction joint of the prefabricated underground diaphragm wall 5 and a post-cast buttress column 12 in advance, and sticking two water-stop adhesive tapes 10. One grouting pipe 11 is pre-buried between two water stop adhesive tapes 10, the grouting pipe 11 comprises a vertical grouting pipe and a horizontal grouting pipe, and the vertical grouting pipe 11 is communicated with the horizontal grouting pipe 11. The grouting pipes 11 are provided with fixing clamps 17 every 0.5 m, and are nailed on the prefabricated underground diaphragm wall 5 by utilizing shooting nails 18, and the end parts of the grouting pipes 11 are sealed by sealing pipes 19. Grouting branch pipes are reserved on the grouting pipes 11 every 4-5 m, pressure grouting is carried out after the construction of the cast-in-place concrete structure and the post-cast buttress column 12 is finished, and the vertical and horizontal construction joints 7 are filled.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims (10)

1. A full-life-cycle waterproof system of a single-wall prefabricated structure of an underground engineering comprises a cast-in-place concrete structure and prefabricated underground diaphragm walls, wherein the cast-in-place concrete structure comprises a cast-in-place top plate, a cast-in-place middle plate and a cast-in-place bottom plate, and the cast-in-place top plate, the cast-in-place middle plate, the cast-in-place bottom plate and two prefabricated underground diaphragm walls form the single-wall prefabricated structure; during construction, a vertical joint exists between the prefabricated underground diaphragm walls of two adjacent single-wall prefabricated structures, and a horizontal construction joint exists between the prefabricated underground diaphragm walls of the single-wall prefabricated structures and a cast-in-place concrete structure;

the method is characterized in that: the two adjacent prefabricated ground connecting walls are assembled through inter-wall connector components, a group of water stop strip bag components are respectively arranged on two sides of the inter-wall connector components between vertical seams of the two adjacent prefabricated ground connecting walls, each water stop strip bag component comprises a water stop strip bag which is stuck in grooves of the inner side strip bag and the outer side strip bag of the two adjacent prefabricated ground connecting walls, slurry is injected into the water stop strip bags through a slurry injection pump after the prefabricated ground connecting walls are completely assembled in place, and a waterproof structure is further arranged on the vertical seams;

the horizontal construction joint position of prefabricated diaphragm wall is pasted and is had twice stagnant water adhesive tape pre-buried between the twice stagnant water adhesive tape have the slip casting pipe, the slip casting pipe is fixed on prefabricated diaphragm wall, the slip casting pipe has connect a plurality of slip casting branch pipes.

2. The underground single-wall precast structure full-life-cycle waterproof system according to claim 1, which is characterized in that: waterproof construction includes pre-buried angle steel and stagnant water steel sheet, is equipped with pre-buried angle steel in the perps inboard of two adjacent prefabricated ground even walls, and the foundation ditch excavation process will stagnant water steel sheet welding is on the pre-buried angle steel of two prefabricated ground even walls.

3. The underground single-wall precast structure full-life-cycle waterproof system according to claim 1, which is characterized in that: the waterproof structure comprises a post-pouring buttress column, water-stop adhesive tapes and grouting pipes, wherein the two sides of the vertical joint on the back surface of the prefabricated underground diaphragm wall are respectively adhered with one water-stop adhesive tape, the grouting pipes are pre-embedded between the two water-stop adhesive tapes, and the post-pouring buttress column is arranged at the vertical joint on the back surface of the prefabricated underground diaphragm wall.

4. The underground single-wall precast structure full-life-cycle waterproof system of claim 3, which is characterized in that: two water stop adhesive tapes are arranged at the vertical construction joint of the prefabricated diaphragm wall and the post-cast buttress column, and the grouting pipe is positioned at a vertical joint of the back surface of the prefabricated diaphragm wall.

5. The underground engineering single wall precast structure full-life cycle waterproof system according to any one of claims 1 to 4, wherein: connector between the width of cloth includes connector, T type width of cloth between C type width of cloth connector, connector between T type width of cloth connector includes T type component and sets up in the slip casting pipe of T type component front end be equipped with the slip casting hole on the slip casting pipe of T type component front end will connector inserts connector between the C type width of cloth between T type width of cloth, and the construction is finished and is carried out the slip casting in the connector between the back C type width of cloth, accomplishes assembling of two adjacent prefabricated ground even walls.

6. The underground single-wall precast structure full-life-cycle waterproof system of claim 5, which is characterized in that: the connector between the C-shaped frames is arranged at a tenon formed in one prefabricated ground connecting wall along the thickness direction, the connector between the T-shaped frames is arranged at a tenon formed in the other prefabricated ground connecting wall along the thickness direction, and the connector between the C-shaped frames and the connector between the T-shaped frames are arranged oppositely.

7. The underground single-wall precast structure full-life-cycle waterproof system according to claim 1, which is characterized in that: when the prefabricated underground continuous wall is constructed, two vertically adjacent prefabricated underground continuous walls are butted in a tenon-tenon mode.

8. The underground single-wall precast structure full-life-cycle waterproof system according to claim 1, which is characterized in that: and (3) performing surface rough surface treatment on the horizontal construction joint position of the prefabricated underground diaphragm wall in advance, and then pasting two water stop adhesive tapes.

9. The underground single-wall precast structure full-life-cycle waterproof system according to claim 1, which is characterized in that: the grouting pipes are provided with fixing clamps every 0.5 m, and are nailed on the prefabricated underground diaphragm wall by using shooting nails, and the end parts of the grouting pipes are sealed by sealing pipes.

10. The underground single-wall precast structure full-life waterproof system of claim 1 or 9, which is characterized in that: and the grouting branch pipes are connected to the grouting pipes every 4-5 meters.

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