Underground engineering outer wall construction joint waterproof structure

Abstract

The utility model provides a waterproof structure for an underground engineering outer wall construction joint. The underground engineering outer wall construction joint waterproof structure comprises a concrete bottom plate, a concrete wall body and a water stop structure. The water stop structure comprises a supporting component and a water stop belt, the supporting component is located in the concrete bottom plate, the bottom of the supporting component is fixedly connected with the concrete bottom plate, the top of the supporting component is fixedly connected with the water stop belt, one part of the water stop belt is located in the concrete bottom plate, and the other part of the water stop belt is located in the concrete bottom plate. And the other part of the water stop belt is located in the concrete wall body, and the water stop belt is perpendicular to the interface of the concrete bottom plate and the concrete wall body.

Description

Technical Field

[0001] The utility model belongs to the technical field of underground engineering waterproofing, and in particular relates to a waterproof structure for construction joints of outer walls of underground engineering. Background Art

[0002] A construction joint is a joint surface formed between the concrete poured earlier and later during the concrete pouring process due to the design requirements or construction needs of the concrete structure being poured in sections. The waterproof quality of the construction joint is closely related to the structural measures and the construction quality, and the construction difficulty of the structural measures also has a great impact on the construction quality. A construction joint waterproof structure is provided in the related art, in which the waterstop is welded to the main reinforcement of the concrete wall by a small section of steel bars and then a fixed steel plate waterstop is erected. However, this operation will increase the construction difficulty during the construction process on the one hand, and on the other hand, the disturbance of the main reinforcement of the wall during the pouring of concrete will also cause the area near the steel plate waterstop to be disturbed. In addition, after the concrete is poured, it will shrink to a certain extent due to internal and external reasons, and cracks are easily generated at the intersection with the steel plate waterstop. Finally, there is a risk of leakage at the construction joint, and the overall performance of the concrete base plate and the concrete exterior wall cannot be guaranteed, which in turn affects the safety and performance of the structure. Utility Model Content

[0003] The utility model provides a waterproof structure for construction joints of outer walls of underground projects, which reduces the construction difficulty and strengthens the waterproof performance of the construction joints between the concrete bottom plate and the concrete outer wall, thereby achieving overall waterproof performance of the structure.

[0004] The utility model provides a waterproof structure for construction joints of exterior walls of underground projects, comprising:

[0005] Concrete slabs, concrete walls and waterstops;

[0006] The waterstop structure includes a supporting component and a waterstop strip, wherein the supporting component is located inside the concrete base plate, the bottom of the supporting component is fixedly connected to the concrete base plate, the top of the supporting component is fixedly connected to the waterstop strip, a portion of the waterstop strip is located inside the concrete base plate structure, and another portion of the waterstop strip is located inside the concrete wall, and the waterstop strip is perpendicular to the interface between the concrete base plate and the concrete wall.

[0007] Optionally, the supporting component includes a plurality of spaced-apart triangular-like brackets, the triangular-like brackets include a first support member, a second support member and a third support member, one end of the first support member is connected to one end of the second support member, the other end of the first support member and the other end of the second support member are connected to the third support member, and the connection point between the first support member and the third support member and the connection point between the second support member and the third support member are located between the two end points of the third support member.

[0008] The connection point between the first support member and the second support member of the triangular-like bracket is fixedly connected to the fourth support member, the fourth support member is located on the central axis of the waterstop, the fourth support member is perpendicular to the plane formed by the first support member, the second support member and the third support member, and the midpoint is located at the connection point between the first support member and the second support member, the triangular-like bracket is fixedly connected to the waterstop via the fourth support member, steel bars are provided inside the concrete base plate, and the triangular-like bracket is fixedly connected to the steel bars inside the concrete base plate via the third support member.

[0009] Optionally, the angle between the first support member and the third support member is equal to the angle between the second support member and the third support member, and the angle α between the first support member and the third support member is 45° to 60°.

[0010] Optionally, a distance L1 between a connection point between the first support member and the third support member and an end point of the third support member close to the first support member is greater than or equal to 50 mm, and a distance L2 between a connection point between the second support member and the third support member and an end point of the third support member close to the second support member is greater than or equal to 50 mm.

[0011] Optionally, the distance S between any two quasi-triangular brackets is 800-1000 mm.

[0012] Optionally, the waterstop includes a first flange, a waterstop body and a second flange, the waterstop body is perpendicular to the interface between the concrete base plate and the concrete wall, the waterstop body is located at the central axis of the concrete wall structural layer, the bottom of the waterstop body is fixedly connected to the center of the first flange, the top of the waterstop body is connected to the second flange, and the angle β between the second flange and the waterstop body is 30° to 45°.

[0013] Optionally, the width D1 of the first flange is 50-60 mm, the width D2 of the water stop plate body is 270-225 mm, and the width D3 of the second flange is 25-30 mm.

[0014] Optionally, the underground engineering exterior wall construction joint waterproofing structure further includes a gap-sealing coating layer, and the gap-sealing coating layer is located at the interface between the concrete base plate and the concrete wall, and on the surface of the waterstop.

[0015] Optionally, the gap-sealing coating layer is a water-based penetrating inorganic waterproofing agent layer.

[0016] Optionally, both the concrete base plate and the concrete wall are made of shrinkage-compensating concrete.

[0017] The technical solution provided by the embodiments of the present disclosure brings the following beneficial effects:

[0018] In the disclosed embodiments, a waterproof structure for the construction joint of the outer wall of an underground project is provided, wherein the waterproof structure for the construction joint of the outer wall of the underground project includes a waterstop structure, the waterstop structure includes a supporting component and a waterstop strip, the top of the supporting component is fixedly connected to the waterstop strip, and the bottom of the supporting component is fixedly connected to the concrete base plate. By providing a waterstop structure with a supporting component, it is not necessary to weld the waterstop strip in the waterstop structure to the steel bars in the concrete wall during construction. On the one hand, the construction difficulty during the construction process is reduced, and the waterstop structure can be directly bound to the steel bars in the concrete base plate during construction, which is conducive to improving construction efficiency. On the other hand, by supporting the waterstop strip with the supporting component, the waterstop strip has no contact with the steel bars in the concrete wall, which can prevent the concrete wall from being disturbed near the waterstop strip due to the disturbance of the main reinforcement of the wall during the casting process, which is conducive to ensuring the waterstop performance of the waterstop structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a waterproof structure for an exterior wall construction joint of an underground project provided by an embodiment of the present disclosure;

[0021] Figure 2 is a structural schematic diagram of a water-stop structure provided by an embodiment of the present disclosure;

[0022] Figure 3 is a schematic structural diagram of a triangular bracket provided by an embodiment of the present disclosure;

[0023] Figure 4 is a schematic structural diagram of another type of triangular bracket provided in an embodiment of the present disclosure;

[0024] Figure 5 It is a schematic diagram of the structure of a water stop provided in an embodiment of the present disclosure.

[0025] Reference numerals:

[0026] 1: Concrete base plate; 2: Concrete wall; 3: Water-stop structure; 4: Construction joint; 5: Gap-sealing coating layer; 6: Cushion layer.

[0027] 11: Steel bars.

[0028] 21: Support component; 22: Waterstop.

[0029] 31: Triangular bracket.

[0030] 101: first support member; 102: second support member; 103: third support member; 104: fourth support member.

[0031] 201: first flange; 202: waterstop body; 203: second flange. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Figure 1 A waterproof structure for construction joints in an underground project exterior wall provided by the embodiment of the present disclosure. Figure 1 The construction joint waterproof structure includes: a concrete base plate 1, a concrete wall 2 and a water-stopping structure 3.

[0034] The waterstop structure 3 includes a supporting component 21 and a waterstop strip 22. The supporting component 21 is located inside the concrete base plate 1. The bottom of the supporting component 21 is fixedly connected to the concrete base plate 1. The top of the supporting component 21 is fixedly connected to the waterstop strip 22. A portion of the waterstop strip 22 is located inside the concrete base plate 1. The other portion of the waterstop strip 22 is located inside the concrete wall 2. The waterstop strip 22 is perpendicular to the interface between the concrete base plate 1 and the concrete exterior wall 2.

[0035] The disclosed embodiments provide a construction joint waterproof structure for the exterior wall of an underground project, wherein the construction joint waterproof structure includes a waterstop structure, the waterstop structure includes a support component and a waterstop strip, the top of the support component is fixedly connected to the waterstop strip, and the bottom of the support component is fixedly connected to the concrete base plate. By providing a waterstop structure with a support component, it is not necessary to weld the waterstop strip in the waterstop structure to the steel bars in the concrete wall during construction. On the one hand, the construction difficulty during the construction process is reduced, and the waterstop structure can be directly bound to the steel bars in the concrete base plate during construction, which is conducive to improving construction efficiency. On the other hand, by supporting the waterstop strip with the support component, the waterstop strip has no contact with the steel bars in the concrete wall, which can prevent the concrete wall from being disturbed near the waterstop strip due to the disturbance of the main reinforcement of the wall during the casting process, which is conducive to ensuring the waterstop performance of the waterstop structure.

[0036] Figure 2 This is a schematic diagram of a water stop structure provided by an embodiment of the present disclosure. Figure 2 The water-stop structure includes a supporting component 21 and a water-stop strip 22, wherein the supporting component 21 includes a plurality of triangular-like brackets 31 that are spaced apart.

[0037] Figure 3 This is a schematic diagram of the structure of a triangular bracket provided by an embodiment of the present disclosure. Figure 3 The triangular bracket 31 includes a first support member 101, a second support member 102 and a third support member 103, one end of the first support member 101 is connected to one end of the second support member 102, the other end of the first support member 101 and the other end of the second support member 102 are connected to the third support member 103, and the connection point between the first support member 101 and the third support member 103 and the connection point between the second support member 102 and the third support member 103 are located between the two end points of the third support member 103.

[0038] The connection point between the first support member 101 and the second support member 102 of the triangular-like bracket 31 is connected and fixed to the fourth support member 104, and the fourth support member 104 is located on the central axis of the waterstop 22. The fourth support member 104 is perpendicular to the plane formed by the first support member 101, the second support member 102 and the third support member 103, and the midpoint is located at the connection point between the first support member 101 and the second support member 102. Multiple triangular-like brackets 31 are connected and fixed to the waterstop 22 through the fourth support member 104, and steel bars 11 are provided inside the concrete base plate 1. The triangular-like bracket 31 is connected and fixed to the steel bars 11 inside the concrete base plate 1 through the third support member 103.

[0039] The steel bars inside the concrete base plate 1 are arranged vertically and crosswise in the horizontal direction.

[0040] In the disclosed embodiment, the connection point between the first support member and the third support member, and the connection point between the second support member and the third support member in the quasi-triangular bracket are located between the two end points of the third support member, that is, the third support member still extends a section to both ends at the connection point between the third support member and the first support member and the second support member, and the section of the third support member extending to both ends is used to tie and fix the third support member to the steel bars in the concrete base plate. A fourth support member is welded to the top of the quasi-triangular bracket, the fourth support member is perpendicular to the plane of the quasi-triangular bracket, the fourth support member is located on the central axis of the waterstop, and the quasi-triangular bracket is welded to the waterstop through the fourth support member. By welding the quasi-triangular bracket to the waterstop through the fourth support member located on the central axis of the waterstop and perpendicular to the plane of the quasi-triangular bracket, the connection effect between the waterstop and the quasi-triangular bracket can be ensured.

[0041] In the embodiment of the present disclosure, the angle between the first support member 101 and the third support member 103 is equal to the angle between the second support member 102 and the third support member 103 , and the angle α between the first support member 101 and the third support member 103 is 45° to 60°.

[0042] Exemplarily, the angle α between the first support member 101 and the third support member 103 is 50°.

[0043] In the embodiment of the present disclosure, the angle between the first support member 101 and the third support member 103 in the quasi-triangular bracket is equal to the angle between the second support member 102 and the third support member 103, which can further ensure the support effect of the quasi-triangular bracket and prevent the quasi-triangular bracket from tipping over. At the same time, the angle α between the first support member 101 and the third support member 103 in the quasi-triangular bracket is 45° to 60°, ensuring that the stability of the quasi-triangular bracket is good enough.

[0044] In the embodiment of the present disclosure, a distance L1 between a connection point between the first support member 101 and the third support member 103 and an end point of the third support member 103 close to the first support member 101 is greater than or equal to 50 mm, and a distance L2 between a connection point between the second support member 102 and the third support member 103 and an end point of the third support member 103 close to the second support member 102 is greater than or equal to 50 mm.

[0045] In the embodiment of the present disclosure, the fourth support member in the triangular-shaped bracket has a length of 100 to 120 mm.

[0046] In the embodiment of the present disclosure, by binding the third support member to the steel bars in the concrete base plate, and setting the distance between the connection point between the first support member and the third support member and the end point of the third support member close to the first support member, and the distance between the connection point between the second support member and the third support member and the end point of the third support member close to the second support member to be larger, it can be ensured that when the third support member is bound to the steel bars in the concrete base plate at the connection point between the first support member and the third support member and the connection point between the second support member and the third support member, the binding effect is better.

[0047] In the embodiment of the present disclosure, the first support member 101 , the second support member 102 , the third support member 103 and the fourth support member 104 are HPB300 steel bars (first-grade steel bars).

[0048] In the embodiment of the present disclosure, the diameters of the first support member 101 , the second support member 102 , the third support member 103 and the fourth support member 104 are greater than or equal to 12 mm.

[0049] Exemplarily, the diameters of the first support member 101 , the second support member 102 , the third support member 103 and the fourth support member 104 are 15 mm.

[0050] It is worth noting that the diameters of the first support member 101 , the second support member 102 , the third support member 103 and the fourth support member 104 may be equal or different, and the present disclosure does not impose any limitation on this.

[0051] It is worth noting that, in the embodiment of the present disclosure, the height of the triangular-shaped bracket 31 is determined based on the thickness of the concrete base plate 1 .

[0052] See again Figure 2 In the disclosed embodiment, the distance S between any two triangular-shaped brackets 31 is 800 to 1000 mm.

[0053] Exemplarily, the distance S between any two triangular-shaped brackets 31 is 900 mm.

[0054] In the disclosed embodiment, the water stop is supported and fixed by setting up triangular-like brackets, wherein the spacing between the triangular-like brackets will affect the supporting effect of the supporting component. If the spacing is too long, the number of triangular-like brackets that can be included in the supporting component will be small, and the number of triangular brackets will be small, and the supporting effect of the supporting component will be poor. If the spacing is too short, the number of triangular-like brackets that can be set in the supporting component is large. If a large number of triangular brackets are set up in the supporting component with a shorter spacing, the production cost of the supporting component will increase, and it will also cause waste of manpower and material resources.

[0055] In the embodiment of the present disclosure, among the plurality of quasi-triangle brackets 31 , the distance between any two quasi-triangle brackets 31 may be equal or unequal, and the present disclosure does not impose any limitation on this.

[0056] In the disclosed embodiment, Figure 2 The support component 21 shown in the figure includes three triangular-like brackets 31. In the actual manufacturing process, the number of triangular-like brackets 31 can be selectively set according to the length of the water stop 22. At the same time, the spacing between the triangular-like brackets 31 is only used as an example. In the actual manufacturing process, the spacing between the triangular-like brackets 31 can be selectively set, and the present disclosure does not limit this.

[0057] Figure 4 This is a schematic diagram of another supporting component provided by an embodiment of the present disclosure. Figure 4 , Figure 4 The fourth support member 104 is perpendicular to the plane formed by the first support member 101 , the second support member 102 and the third support member 103 .

[0058] Figure 5 This is a schematic diagram of the structure of a water stop provided by an embodiment of the present disclosure. Figure 5 The waterstop includes a first flange 201, a waterstop body 202 and a second flange 203. The waterstop body 202 is perpendicular to the interface between the concrete base plate 1 and the concrete wall 2. The waterstop body 202 is located at the central axis of the concrete wall 2. The bottom of the waterstop body 202 is fixedly connected to the center of the first flange 201, and the top of the waterstop body 202 is connected to the second flange 203. The angle β between the second flange 203 and the waterstop body 202 is 30°~45°.

[0059] Exemplarily, the angle β between the second flange 203 and the waterstop body 202 is 31°.

[0060] In the embodiment of the present disclosure, a first flange is set at the bottom of the waterstop, which is welded to the fourth support member through the first flange, and a second flange is set on the top of the waterstop. The inclined second flange can further enhance the waterstop effect of the waterstop. To ensure the waterstop effect of the second flange, the angle between the second flange and the waterstop main body bracket is set to 30°~45° to ensure that the waterstop effect of the second flange is good enough.

[0061] In the disclosed embodiment, the width D1 of the first flange 201 is 50-60 mm, the width D2 of the water stop plate body is 270-225 mm, and the width D3 of the second flange is 25-30 mm.

[0062] Exemplarily, the width D1 of the first flange 201 is 55 mm, the width D2 of the water stop plate body is 300 mm, and the width D3 of the second flange is 28 mm.

[0063] In the disclosed embodiment, if the width of the first flange is too small, it will increase the difficulty of welding the first flange and the fourth support member. If the width of the first flange is wide, it will increase the manufacturing cost. The use of the first flange with the above width can ensure that the welding difficulty of the first flange and the fourth support member is low on the basis of low manufacturing cost. If the width of the waterstop plate body is low, it will cause the width of the waterstop plate body in the concrete base plate and the concrete wall to be low, so that the waterstop effect of the waterstop plate is poor. If the width of the waterstop plate body is wide, it is not conducive to the manufacturing cost of the waterstop plate body. The use of the waterstop plate body with the above width can ensure the waterstop effect of the waterstop plate body on the basis of ensuring the manufacturing cost. The width of the second flange is also related to the waterstop effect of the waterstop plate. In order to ensure that the waterstop effect of the waterstop plate is better and the manufacturing cost of the second flange is lower, the second flange with the above width is used.

[0064] See again Figure 1 In the disclosed embodiment, the underground engineering exterior wall construction joint waterproofing structure also includes a gap sealing coating layer 5, and the gap sealing coating layer 5 is located at the interface between the concrete base plate 1 and the concrete wall 2, and on the surface of the water stop strip 22.

[0065] There is a construction joint 4 at the interface between the concrete base plate 1 and the concrete wall 2 , and a gap-sealing coating layer 5 is arranged at the construction joint 4 .

[0066] In the disclosed embodiments, during the construction of the concrete structure, gaps will appear between the concrete base slab and the concrete wall, as well as between the waterstop and the concrete base slab, and the concrete wall. By providing a gap-sealing coating layer at the interface between the concrete base slab and the concrete wall, the gap-sealing coating layer is used to seal the gaps between the concrete base slab and the concrete wall, as well as between the waterstop and the concrete base slab, and the concrete wall, thereby improving the overall waterproof performance of the concrete structure.

[0067] In the disclosed embodiment, the gap-sealing coating layer 5 is a water-based penetrating inorganic waterproofing agent layer.

[0068] In the disclosed embodiment, a water-based permeable inorganic waterproofing agent layer is used as the void-sealing coating layer, which can ensure that the waterproofing performance of the void-sealing coating layer is good enough.

[0069] In the disclosed embodiment, the concrete base plate 1 and the concrete wall 2 are made of shrinkage compensating concrete mixed with a magnesium anti-cracking reinforcing agent.

[0070] In the disclosed embodiment, the concrete base plate 1 and the concrete wall 2 use shrinkage-compensating concrete to effectively reduce the risk of cracks caused by concrete shrinkage and improve the crack resistance and waterproof performance of the concrete structure.

[0071] It is worth noting that in the disclosed embodiment, on the one hand, a water-stop structure is provided to reduce the difficulty of construction, improve construction efficiency, and reduce the disturbance of the water-stop strip during construction, thereby ensuring the water-stop performance of the water-stop structure. On the other hand, in addition, shrinkage compensating concrete and a gap-sealing coating layer are used to strengthen the joint between the concrete base plate and the concrete exterior wall, thereby improving the waterproof performance of the construction joint between the concrete base plate and the concrete exterior wall and achieving structural integrity. Under the joint action of the above multiple structures, it is ensured that the waterproof performance of the concrete wall at the construction joint is strong.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A waterproof structure for construction joints of exterior walls of underground projects, characterized in that: include: Concrete slabs, concrete walls and waterstops; The waterstop structure includes a supporting component and a waterstop strip, wherein the supporting component is located inside the concrete base plate, the bottom of the supporting component is fixedly connected to the concrete base plate, the top of the supporting component is fixedly connected to the waterstop strip, a portion of the waterstop strip is located inside the concrete base plate, and another portion of the waterstop strip is located inside the concrete wall, and the waterstop strip is perpendicular to the interface between the concrete base plate and the concrete wall.

2. The waterproof structure for underground engineering exterior wall construction joint according to claim 1, characterized in that: The support component includes a plurality of triangular-shaped brackets distributed at intervals, and the triangular-shaped bracket includes a first support member, a second support member, and a third support member, one end of the first support member is connected to one end of the second support member, the other end of the first support member and the other end of the second support member are connected to the third support member, and the connection point between the first support member and the third support member and the connection point between the second support member and the third support member are located between two end points of the third support member; The connection point between the first support member and the second support member of the triangular-like bracket is fixedly connected to the fourth support member, the fourth support member is located on the central axis of the waterstop, the fourth support member is perpendicular to the plane formed by the first support member, the second support member and the third support member, and the midpoint is located at the connection point between the first support member and the second support member, the triangular-like bracket is fixedly connected to the waterstop via the fourth support member, steel bars are provided inside the concrete base plate, and the triangular-like bracket is fixedly connected to the steel bars inside the concrete base plate via the third support member.

3. The underground engineering exterior wall construction joint waterproof structure according to claim 2, characterized in that: The included angle between the first support member and the third support member is equal to the included angle between the second support member and the third support member, and the included angle α between the first support member and the third support member is 45° to 60°.

4. The underground engineering exterior wall construction joint waterproof structure according to claim 2, characterized in that: The distance L1 between the connection point between the first support member and the third support member and the end point of the third support member close to the first support member is greater than or equal to 50 mm, and the distance L2 between the connection point between the second support member and the third support member and the end point of the third support member close to the second support member is greater than or equal to 50 mm.

5. The underground engineering exterior wall construction joint waterproof structure according to claim 2, characterized in that: The distance S between any two quasi-triangular brackets is 800 to 1000 mm.

6. The waterproof structure for construction joints of exterior walls of underground projects according to any one of claims 1 to 5, characterized in that: The waterstop strip includes a first flange, a waterstop strip body and a second flange. The waterstop strip body is perpendicular to the boundary surface between the concrete base plate and the concrete wall. The waterstop strip body is located at the central axis of the concrete wall structural layer. The bottom of the waterstop strip body is fixedly connected to the center of the first flange, and the top of the waterstop strip body is connected to the second flange. The angle β between the second flange and the waterstop strip body is 30° to 45°.

7. The waterproof structure for construction joints of exterior walls of underground projects according to claim 6, characterized in that: The width D1 of the first flange is 50-60 mm, the width D2 of the waterstop body is 270-225 mm, and the width D3 of the second flange is 25-30 mm.

8. The waterproof structure for construction joints of exterior walls of underground projects according to any one of claims 1 to 5, characterized in that: The underground engineering exterior wall construction joint waterproofing structure also includes a gap-sealing coating layer, and the gap-sealing coating layer is located at the interface between the concrete base plate and the concrete wall, and is located on the surface of the waterstop.

9. The waterproof structure for construction joints of exterior walls of underground projects according to claim 8, characterized in that: The gap-sealing coating layer is a water-based penetrating inorganic waterproofing agent layer.

10. The waterproof structure for construction joints of exterior walls of underground projects according to any one of claims 1 to 5, characterized in that: The concrete base plate and the concrete wall are both made of shrinkage compensating concrete.

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