CN107542115B - Underground engineering waterproof structure and construction method thereof - Google Patents
Underground engineering waterproof structure and construction method thereof Download PDFInfo
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- CN107542115B CN107542115B CN201710743969.1A CN201710743969A CN107542115B CN 107542115 B CN107542115 B CN 107542115B CN 201710743969 A CN201710743969 A CN 201710743969A CN 107542115 B CN107542115 B CN 107542115B
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Abstract
The invention discloses a waterproof structure of underground engineering and a construction method thereof, wherein the waterproof structure comprises the following components: arranging an enclosure structure on the side wall of a pre-excavated foundation pit, arranging a concrete cushion layer on the bottom surface of the foundation pit, fixedly connecting a template on the inner side surface of the enclosure structure, and arranging a waterproof coiled material layer on the inner side surface of the template and the concrete cushion layer; the construction method comprises the following steps: s1, building an enclosure structure on the side wall of a pre-excavated foundation pit, and excavating the foundation pit; s2, pouring a concrete cushion layer at the bottom of the foundation pit; s3, fixing a template on the inner side of the enclosure structure, and paving a waterproof coiled material layer on the inner side of the template; s4, paving a waterproof coiled material layer on the concrete cushion layer; pouring a waterproof protective layer of the bottom plate on the waterproof coiled material layer; s5, arranging an underground engineering main body structure on the inner side of the waterproof coiled material layer of the side wall and the waterproof protective layer of the bottom plate. The invention can accelerate the waterproof construction progress of underground engineering, reduce the comprehensive cost and improve the safety coefficient of the operation in the foundation pit of the underground engineering.
Description
Technical Field
The invention relates to the technical field of underground engineering construction, in particular to an underground engineering waterproof structure and a construction method thereof.
Background
Underground works refer to works in which various types of underground structures or structures are built in soil layers or rock masses below the ground. It comprises the following steps: underground railways, tunnels, parking lots, underground malls, civil air defense, basements, pipe galleries and the like. With the continuous development of urban capital construction, the construction and use of underground engineering greatly improve the utilization rate of land use, so that the application of underground engineering is more and more extensive, but the waterproof problem of underground engineering is faced at the same time. Underground engineering waterproofing is a key content of the whole engineering quality, if an underground engineering waterproofing structure with good sealing is not provided, leakage of underground water can be caused, and long-term leakage can corrode a reinforced structure in the concrete of a building, so that the durability, the safety and the use function of the concrete building structure are inevitably affected. Therefore, it is necessary to make a waterproof structure well.
The conventional method for underground waterproof engineering construction comprises an external-protection external-adhesion method and an external-protection internal-adhesion method, wherein the external-protection external-adhesion method is to directly adhere a coiled material waterproof layer to a side wall (namely an upstream surface of an underground structural wall) after the construction of the structural side wall (an external wall with a reinforced concrete structure) is completed, and finally, the coiled material waterproof layer is used as a protective layer of the coiled material waterproof layer; the external protection and internal adhesion method is a method of firstly building a protection wall in a foundation pit before construction, then adhering a coiled material waterproof layer on the protection wall, and finally pouring side wall concrete. Generally, because the construction conditions are limited, no operation space exists, and when the construction of the external protection and external adhesion method is difficult to implement, the construction method of external protection and internal adhesion and water resistance is adopted.
When the external protection and the internal adhesion are adopted in actual waterproof construction of underground engineering, the traditional methods generally have two types: (1) A steel sheet pile enclosure structure or a concrete enclosure structure is arranged on the side wall of the foundation pit, a brick molding bed is built on the inner side of the concrete enclosure structure, and the brick molding bed is subjected to complicated procedures of foundation cushion layer laying, building, plastering and the like; this procedure easily causes the following problems: a. the construction period required by building brick bed-jig and plastering is long; b. the material cost and the labor cost required by the brick moulding bed are high; c. because the construction period is long, the foundation pit is exposed for a long time, the problem that soil body is easy to bulge in the foundation pit is solved, and the instability factor of the foundation pit support structure is increased; (2) The invention discloses a construction method of pre-paving an anti-sticking waterproof roll for a large-scale underground waterproof project, which is characterized in that a brick-building tire film is not needed, the working procedures are reduced, and a treatment layer, namely a side wall leveling layer, is needed to be applied to fill gaps or grooves between concrete enclosing structures, and the construction method has the following problems: a. the treatment layer needs to be leveled for many times by fine stone concrete or mortar, so that the leveling effect can be achieved, and the treatment layer cannot be too thick, otherwise, the treatment layer is easy to fall off, so that the construction speed is relatively low, more labor is spent, the construction period is long, and the instability factor of the foundation pit support structure is increased; b. fix waterproofing membrane on the disposal layer through the steel nail, still can cause the destruction to waterproofing membrane, and then influence totally enclosed water-proof effects.
Disclosure of Invention
The invention discloses an underground engineering waterproof structure and a construction method thereof, which can accelerate the waterproof construction progress of underground engineering, reduce the comprehensive manufacturing cost and improve the safety operation coefficient in a foundation pit of the underground engineering.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
arranging an enclosure structure on the side wall of a pre-excavated foundation pit, arranging a concrete cushion layer on the bottom surface of the foundation pit, fixedly connecting a template on the inner side surface of the enclosure structure, and arranging a waterproof coiled material layer on the inner side surface of the template and the concrete cushion layer;
the template is a non-wall template and can comprise, but is not limited to, a plastic template, a wooden template and a steel template, wherein the inner side surface of the template is attached to the waterproof coiled material layer.
Further, the enclosure structure is a steel sheet pile enclosure structure or a concrete enclosure structure, and the concrete enclosure structure is one or two of an underground continuous wall, a bored cast-in-place pile, a hole-digging cast-in-place pile, a concrete sheet pile and an SMW construction method pile. The form and concrete enclosure structure may be connected by conventional fixed connection means, such as steel nails.
Further, the enclosure structure is a steel sheet pile enclosure structure, and an isolation layer is arranged between the steel sheet pile enclosure structure and the template. Still further, the barrier layer is made of foam board.
Preferably, the inner support is clamped in the groove of the steel sheet pile enclosure structure, and the template passes through the template through the first fixing piece to be fixed on the inner support. The invention also provides a preferable structure of the inner support, the inner support comprises transverse struts and vertical struts, the transverse struts are provided with more than 2, and two ends of the transverse struts are respectively clamped on the inner wall of the steel sheet pile enclosure structure groove; the vertical support is fixedly connected to the inner side of the transverse support, and is flush with the convex surface of the steel sheet pile enclosure structure/protrudes out of the convex surface of the steel sheet pile enclosure structure to be not more than 5 cm/sunken in the convex surface of the steel sheet pile enclosure structure to be not more than 20cm.
Further, a leveling layer is arranged between the concrete cushion layer and the waterproof coiled material layer, and the waterproof coiled material layer at least comprises a layer of waterproof coiled material; a waterproof coiled material layer on the concrete cushion layer is provided with a bottom plate waterproof protective layer; the inner side or the outer side of the enclosure structure can be provided with other peripheral precipitation or water stopping structures commonly used for foundation pits, and the peripheral precipitation or water stopping structures are well pipes or waterproof curtains.
Further, when the concrete enclosure structure connected with the templates is a bored cast-in-place pile, a hole-digging cast-in-place pile or an SMW construction method pile, the templates are provided with more than two, the outer side surfaces of the transversely spliced templates are provided with connecting parts for connection, and the connecting parts are inserted into gaps of the concrete enclosure structure. Further, the connection member may be a connection square bar.
The invention also provides a construction method adopting the underground engineering waterproof structure, which comprises the following steps:
s1, building an enclosure structure on the side wall of a pre-excavated foundation pit, then excavating the foundation pit, setting a supporting structure of the enclosure structure, and excavating the foundation pit to a designed elevation;
s2, pouring a concrete cushion layer at the bottom of the foundation pit, and pouring a leveling layer of fine stone concrete or cement mortar on the concrete cushion layer;
s3, fixedly mounting a template on the inner side of the enclosure structure, and paving a waterproof coiled material layer on the inner side of the template;
s4, paving a waterproof coiled material layer on the concrete cushion layer; pouring a waterproof protection layer of the bottom plate on the waterproof coiled material layer above the concrete cushion layer;
s5, arranging an underground engineering main body structure on the inner side of the waterproof coiled material layer of the side wall and the waterproof protective layer of the bottom plate.
Further, when the enclosure is a steel sheet pile enclosure, the step S3 includes the following substeps:
s3-1, clamping more than 2 transverse struts in a groove of a steel sheet pile enclosure structure at intervals, and then vertically and fixedly mounting vertical struts on the inner sides of the transverse struts;
s3-2, paving an isolation layer on the inner side of the steel sheet pile enclosure structure;
s3-3, paving a template on the inner side of the isolation layer, and enabling the template to pass through the template and the isolation layer by utilizing a first fixing piece so as to be fixedly arranged on the vertical support;
s3-4, paving a waterproof coiled material layer on the inner side of the template.
Further, when the concrete enclosure structure connected with the formwork is a bored cast-in-place pile, a hole-digging cast-in-place pile or an SMW construction method pile, the step S3 includes the following sub-steps:
the method comprises the steps of fixedly connecting templates together through connecting parts, paving the templates on the inner side surface of a concrete enclosure, inserting the connecting parts of the templates into gaps of the concrete enclosure, and fixedly mounting the templates on the concrete enclosure through second fixing parts; and paving a waterproof coiled material layer on the inner side of the template.
The underground engineering waterproof structure and the construction method adopted for realizing the structure have the following beneficial effects:
1. because the template is arranged on the inner side of the enclosure structure, the waterproof coiled material can be directly adhered to the template, so that the working procedures required by brick moulding bed or side wall leveling layer construction are omitted, the waterproof construction period of underground engineering is shortened, and the material cost and labor cost of the underground engineering are reduced.
2. Because the construction period of the waterproof structure is shortened, the exposure time of the foundation pit is reduced, the stability of the foundation pit is maintained, and the safety coefficient of the operation in the pit is improved.
3. The template and the foam board adopted in construction are wide in sources and low in cost;
4. the waterproof coiled material is adhered to the fixed template, steel nails or other fixing pieces are not needed to be used for fixing the waterproof coiled material, the waterproof coiled material is prevented from being damaged, and therefore good waterproof effect of sealing is further guaranteed.
5. The method has the advantages of simple operation, low cost and wide popularization prospect, and compared with the traditional construction efficiency, the method has obvious improvement.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of embodiment 2 of the present invention.
Fig. 3 is a schematic view of the structure of the support in embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of a connecting member according to embodiment 2 of the present invention.
In the figure, an enclosure structure 1, a concrete cushion layer 2, a leveling layer 3, a waterproof coiled material layer 4, a structural layer 5, a template 6, an isolation layer 7, a bottom plate waterproof protection layer 8, vertical supports 9, transverse supports 10 and connecting square bars 11.
Detailed Description
The present invention will be further described with reference to the following examples, but the scope of the present invention is not limited to the following examples.
The underground engineering referred to in the following embodiments may be a pipe gallery, a basement, an underground mall, a civil air defense, or a submarine tunnel under a river bed.
The inner side surface described in the following embodiment is a relative concept, that is, the position where the enclosure structure is located is the periphery of the waterproof structure layer, the waterproof structure layer is gradually arranged inside the foundation pit in sequence, and the side of the waterproof structure layer facing the center of the foundation pit is the inner side surface.
Example 1
Referring to fig. 1, an underground engineering waterproof structure is shown, an enclosure structure 1 is arranged on the side wall of a pre-excavated foundation pit, a concrete cushion layer 2 is arranged on the bottom surface of the foundation pit, a template 6 is fixedly connected to the inner side surface of the enclosure structure 1, and a waterproof coiled material layer 4 is adhered to the inner side surface of the template 6 and the upper surface of the concrete cushion layer 2. The form 6 is a non-wall form.
In this embodiment, the enclosure 1 is a steel sheet pile enclosure. In order to prevent the template 6 from being disturbed when the steel sheet pile enclosure structure is disassembled, an isolation layer 7 is further arranged between the template 6 and the steel sheet pile enclosure structure, the isolation layer in the embodiment is made of a foam board, the foam board is firstly paved on the inner side of the steel sheet pile enclosure structure, and then the template 6 is fixed on the inner side of the foam board.
The template 6 that this embodiment adopted is wooden template, and the medial surface of template 6 is the level surface, can laminate with waterproofing membrane layer 4 better mutually. The wooden template can well replace the traditional brick fetal membrane, provides a smooth pasting surface for paving the waterproof coiled material layer, is firmly bonded with the waterproof coiled material layer, thereby avoiding the working procedure of building the brick fetal membrane, reducing the material cost and the labor cost, accelerating the waterproof construction progress, reducing the exposure time of a foundation pit, well maintaining the stability of the foundation pit, improving the safety operation coefficient in the pit, and simultaneously, having simple working procedure, low cost and easy realization. The wooden form may be replaced with a plastic form or a steel form.
For realizing that template 6 can not produce the aversion when steel sheet pile envelope dismantles, this embodiment preferably adopts the fixed mode that easily dismantles the separation, combines the recess inside callipers of steel sheet pile envelope to be equipped with interior support as shown in fig. 3, and template 6 passes template 6 and isolation layer 7 fixed mounting through first mounting on interior support 1, and the first mounting that this embodiment adopted is the nail. The embodiment provides a preferable structure of the internal support, which comprises a transverse support 10 and a vertical support 9, wherein the transverse support 10 is provided with more than 2 transverse supports, and two ends of the transverse support 10 are respectively clamped on the inner wall of a groove of the steel sheet pile enclosure structure at intervals, so as to provide a fixed support for the vertical support 9; the vertical supports 9 are fixedly connected to the inner sides of the transverse supports 10 at intervals, and the vertical supports 9 are optimally flush with the convex surface of the steel sheet pile enclosure structure, but a certain engineering error range can also be achieved, namely, the convex surface protruding out of the steel sheet pile enclosure structure is not more than 5cm or the convex surface sinking into the steel sheet pile enclosure structure is not more than 20cm. In order to save cost, the vertical support 9 and the transverse support 10 can be made of square timber, and the vertical support 9 and the transverse support 10 can be fixedly connected together through nails.
Further, a leveling layer 3 is further paved between the concrete cushion layer 2 and the waterproof coiled material layer 4, fine stone concrete or cement mortar can be adopted for the leveling layer 3, and the leveling layer 3 can help the waterproof coiled material layer 4 to be flatly paved on the bottom surface of the foundation pit. The waterproof coiled material layer at least comprises a layer of waterproof coiled material, and 2 or 3 layers of waterproof coiled materials can be paved according to design requirements. The waterproof coiled material layer on the concrete cushion layer is provided with a bottom plate waterproof protective layer so as to prevent the waterproof coiled material from being damaged during the construction of the underground engineering main body structure.
Furthermore, in order to enhance the water-stopping effect, the inner side or the outer side of the enclosure structure 1 can be provided with other peripheral precipitation or water-stopping structures commonly used for foundation pits, such as a water-stopping curtain, well pipe precipitation and the like, for temporary precipitation drainage.
The roof waterproof structure of the underground engineering main body structure of the embodiment can adopt the existing common roof waterproof structure.
The construction method adopting the underground engineering waterproof structure comprises the following steps:
s1, constructing an enclosure structure 1 on the side wall of a pre-excavated foundation pit, wherein the enclosure structure 1 is a steel sheet pile enclosure structure in the embodiment, namely, constructing the steel sheet pile enclosure structure according to a conventional construction method; then excavating a foundation pit, arranging a support system of the enclosure structure to prevent displacement and deformation, enabling the enclosure structure to be more stable, arranging a well pipe or a waterproof curtain on the inner side or the outer side of the enclosure structure of the steel sheet pile to carry out dewatering and drainage according to a conventional construction method if the enclosure structure meets the requirement of dewatering, and then excavating the foundation pit to a designed elevation;
s2, pouring a concrete cushion layer 2 at the bottom of the foundation pit, and pouring a leveling layer of fine stone concrete or cement mortar on the concrete cushion layer;
s3, fixedly mounting a template 6 on the inner side of the enclosure structure 1, filling the joint of the template 6 and the concrete cushion layer 2 with fine stone concrete or cement mortar to form a circular arc-shaped transition surface so that the waterproof coiled material can be better attached to the transition joint, paving a waterproof coiled material layer 4 on the inner side of the template 6, and flatly adhering the waterproof coiled material on the template;
s4, paving a waterproof coiled material layer 4 on the concrete cushion layer 2, and pouring a bottom plate waterproof protective layer 8 on the waterproof coiled material layer 4 on the concrete cushion layer;
s5, applying an underground engineering main body structure on the inner side of the waterproof coiled material layer of the side wall and the waterproof protective layer of the bottom plate according to a conventional construction method, wherein a structural layer 5 shown in the figure is a local structure of the underground engineering main body structure; applying a roof waterproof structure; backfilling the foundation pit; and (5) pulling out the steel sheet pile enclosure structure.
Wherein step S3 comprises the sub-steps of:
s3-1, more than 2 transverse struts 10 are clamped in a groove of a steel sheet pile enclosure structure at intervals, and then vertical struts 9 are vertically and fixedly arranged on the inner sides of the transverse struts 10;
s3-2, paving an isolation layer 7 on the inner side of the steel sheet pile enclosure structure;
s3-3, paving a template 6 on the inner side of the isolation layer 7, and penetrating the template 6 and the isolation layer 7 by using a first fixing piece, wherein the first fixing piece adopted in the embodiment is a nail, so that the template 6 is fixedly arranged on the vertical support 9; then filling the joint of the template 6 and the concrete cushion layer 2 with fine stone concrete or cement mortar to form a circular arc-shaped transition surface;
s3-4, paving a waterproof coiled material layer on the inner side of the template 6, namely adhering the waterproof coiled material to the template 6.
Example 2
Referring to fig. 2, an underground engineering waterproof structure is shown, wherein an enclosure structure 1 is arranged on the side wall of a pre-excavated foundation pit, a concrete cushion layer 2 is arranged on the bottom surface of the foundation pit, a template 6 is fixedly connected to the inner side surface of the enclosure structure 1, and a waterproof coiled material layer 4 is adhered to the inner side surface of the template 6 and the upper surface of the concrete cushion layer 2. The form 6 is a non-wall form.
In this embodiment, the enclosure structure 1 is a concrete enclosure structure, and the concrete enclosure structure is more specifically an underground continuous wall, and may be one or two of a cast-in-place bored pile, a concrete sheet pile and an SMW method pile. The template 6 adopts plastic formwork, and the medial surface of template 6 is smooth surface, can laminate with waterproofing membrane layer 4 better mutually, and plastic formwork 6 accessible second mounting fixed mounting is at concrete envelope's medial surface, and the second mounting that this embodiment adopted is the nail. The plastic template can well replace a brick bed-jig or a building envelope side wall leveling layer, and a flat pasting plane is provided for paving the waterproof coiled material layer 4, so that the working procedures of building the brick bed-jig or manufacturing the building envelope side wall leveling layer are avoided, the material cost and the labor cost are reduced, the waterproof construction progress is accelerated, the exposure time of a foundation pit is shortened, the stability of the foundation pit is well maintained, and the safety operation coefficient in the pit is improved. In addition, because the waterproof coiled material layer can be directly adhered to the template, the damage to the waterproof coiled material caused by adopting a steel nail fixing mode is avoided, and therefore the full-sealing waterproof effect is ensured. The plastic form may be replaced by a wooden form or a steel form.
When the concrete enclosure structure connected with the templates is a bored cast-in-place pile, a hole-digging cast-in-place pile or an SMW construction method pile, larger gaps are generally formed between pile bodies, when more than two templates 6 are arranged, and when the transverse joint joints of the templates 6 are positioned between the gaps of the concrete enclosure structure, connecting parts are arranged between the outer side surfaces of the transversely spliced templates 6 for connection so as to enable the connection of the templates 6 to be more stable, the connecting parts are selected as connecting square bars 11 for saving cost, and the length of the connecting square bars 11 is optimal to be capable of being inserted into the gaps of the concrete enclosure structure. The embodiment can ensure the stability and flatness of the combination between the templates 6 by adding the connecting square bars 11.
Further, a leveling layer 3 is further paved between the concrete cushion layer 2 and the waterproof coiled material layer 4, the leveling layer 3 can be made of fine stone concrete or cement mortar, and the leveling layer 3 can help the waterproof coiled material layer 4 to be flatly paved on the bottom surface of the foundation pit. The waterproof coiled material layer at least comprises a layer of waterproof coiled material, and 2 or 3 layers of waterproof coiled materials can be paved according to design requirements. The waterproof coiled material layer on the concrete cushion layer is provided with a bottom plate waterproof protective layer so as to prevent the waterproof coiled material from being damaged during the construction of the underground engineering main body structure.
Furthermore, in order to enhance the water-stopping effect, the inner side or the outer side of the enclosure structure 1 can be provided with other peripheral precipitation or water-stopping structures commonly used for foundation pits, such as a water-stopping curtain, well pipe precipitation and the like, for temporary precipitation drainage.
The roof waterproof structure of the underground engineering main body structure of the embodiment can adopt the existing common roof waterproof structure.
The construction method adopting the underground engineering waterproof structure comprises the following steps:
s1, firstly, constructing an enclosure structure 1 on the side wall of a pre-excavated foundation pit according to a conventional method, wherein the enclosure structure 1 is a concrete enclosure structure 1 in the embodiment; then excavating a foundation pit, arranging a support system of the enclosure structure to prevent displacement and deformation, enabling the enclosure structure to be more stable, arranging a well pipe or a waterproof curtain outside the concrete enclosure structure for dewatering and draining according to a conventional construction method if dewatering is required, and then excavating the foundation pit to a designed elevation;
s2, pouring a concrete cushion layer 2 at the bottom of the foundation pit, and pouring a leveling layer of fine stone concrete or cement mortar on the concrete cushion layer;
s3, installing a template 6 on the inner side of the enclosure structure 1 through fixed steel nails, filling the joint of the template 6 and the concrete cushion layer 2 with fine stone concrete or cement mortar to form a circular arc-shaped transition surface so that the waterproof coiled material can be better attached to the transition joint, paving a waterproof coiled material layer 4 on the inner side of the template 6, and adhering the waterproof coiled material to the template 6;
s4, paving a waterproof coiled material layer 4 on the concrete cushion layer 2, and pouring a bottom plate waterproof protective layer 8 on the waterproof coiled material layer 4 on the concrete cushion layer;
s5, applying an underground engineering main body structure on the inner side of the waterproof coiled material layer of the side wall and the waterproof protective layer of the bottom plate according to a conventional construction method, wherein a structural layer 5 shown in the figure is a local structure of the underground engineering main body structure; constructing a roof waterproof structure, and backfilling a foundation pit; when the foundation pit is backfilled, the backfill can fill up gaps between the templates 6 and the concrete surrounding structure.
When the concrete enclosure structure connected with the template is a bored cast-in-place pile, a hole-digging cast-in-place pile or an SMW construction method pile, the step S3 comprises the following substeps:
the method comprises the steps of fixedly connecting templates 6 together through connecting square bars 11, paving the templates on the inner side surface of a concrete enclosure, inserting the connecting square bars 11 at the transverse joint of the templates into gaps of the concrete enclosure, and fixedly mounting the templates on the concrete enclosure through second fixing pieces; the second fixing piece adopted in the embodiment is a steel nail; and paving a waterproof coiled material layer on the inner side of the template.
If the diaphragm wall or the concrete sheet pile is connected with the formwork, no gap exists, and no additional connecting component is needed.
Claims (3)
1. The utility model provides an underground works waterproof construction which characterized in that:
arranging an enclosure structure on the side wall of a pre-excavated foundation pit, arranging a concrete cushion layer on the bottom surface of the foundation pit, fixedly connecting a template on the inner side surface of the enclosure structure, and arranging a waterproof coiled material layer on the inner side surface of the template and the concrete cushion layer;
the template is a non-wall template and is a plastic template or a wooden template; the inner side surface of the template is attached to the waterproof coiled material layer;
the enclosure structure is a steel sheet pile enclosure structure or a concrete enclosure structure, and the concrete enclosure structure is one or two of an underground continuous wall, a bored cast-in-place pile, a hole digging cast-in-place pile, a concrete sheet pile and an SMW construction method pile;
the building enclosure is a steel sheet pile building enclosure, and when the template is a wooden template, an isolation layer is arranged between the steel sheet pile building enclosure and the template; the isolating layer is made of foam plates;
an inner support is clamped in the groove of the steel sheet pile enclosure structure, and the template passes through the template through a first fixing piece and is fixed on the inner support;
the inner support comprises transverse supports and vertical supports, wherein the transverse supports are provided with more than 2 transverse supports, and two ends of each transverse support are respectively clamped on the inner wall of the steel sheet pile enclosure structure groove; the vertical support is fixedly connected to the inner side of the transverse support, and is flush with the convex surface of the steel sheet pile enclosure structure/protrudes out of the convex surface of the steel sheet pile enclosure structure to be not more than 5 cm/is sunken in the convex surface of the steel sheet pile enclosure structure to be not more than 20cm;
when the concrete enclosure structure connected with the templates is a drilling cast-in-place pile, a hole digging cast-in-place pile or an SMW construction method pile, the templates are provided with more than two, the outer side surfaces of the transversely spliced templates are connected by connecting parts, and the connecting parts are inserted into gaps of the concrete enclosure structure.
2. The underground works waterproof construction of claim 1, wherein:
a leveling layer is further arranged between the concrete cushion layer and the waterproof coiled material layer, and the waterproof coiled material layer at least comprises a layer of waterproof coiled material;
a waterproof coiled material layer on the concrete cushion layer is provided with a bottom plate waterproof protective layer;
the inside or outside of the enclosure structure is also provided with a peripheral precipitation or water stop structure, and the peripheral precipitation or water stop structure is a well pipe or a water stop curtain.
3. A method of constructing a waterproof structure for underground works according to claim 1, comprising the steps of:
s1, building an enclosure structure on the side wall of a pre-excavated foundation pit, then excavating the foundation pit, setting a supporting structure of the enclosure structure, and excavating the foundation pit to a designed elevation;
s2, pouring a concrete cushion layer at the bottom of the foundation pit, and pouring a leveling layer of fine stone concrete or cement mortar on the concrete cushion layer;
s3, fixedly mounting a template on the inner side of the enclosure structure, and paving a waterproof coiled material layer on the inner side of the template;
s4, paving a waterproof coiled material layer on the concrete cushion layer; pouring a waterproof protection layer of the bottom plate on the waterproof coiled material layer above the concrete cushion layer;
s5, arranging an underground engineering main body structure on the inner side of the waterproof coiled material layer of the side wall and the waterproof protective layer of the bottom plate;
when the enclosure is a steel sheet pile enclosure, the step S3 includes the following substeps:
s3-1, clamping more than 2 transverse struts in a groove of a steel sheet pile enclosure structure at intervals, and then vertically and fixedly mounting vertical struts on the inner sides of the transverse struts;
s3-2, paving an isolation layer on the inner side of the steel sheet pile enclosure structure;
s3-3, paving a template on the inner side of the isolation layer, and enabling the template to pass through the template and the isolation layer by utilizing a first fixing piece so as to be fixedly arranged on the vertical support;
s3-4, paving a waterproof coiled material layer on the inner side of the template;
when the concrete enclosure structure connected with the template is a bored cast-in-place pile, a hole-digging cast-in-place pile or an SMW construction method pile, the step S3 comprises the following substeps:
the method comprises the steps of fixedly connecting templates together through connecting parts, paving the templates on the inner side surface of a concrete enclosure, inserting the connecting parts of the templates into gaps of the concrete enclosure, and fixedly mounting the templates on the concrete enclosure through second fixing parts; and paving a waterproof coiled material layer on the inner side of the template.
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| CN108824446A (en) * | 2018-07-16 | 2018-11-16 | 北京市政建设集团有限责任公司 | A method of improving foundation pit SMW fender post waterproof performance |
| CN110331740B (en) * | 2019-06-05 | 2021-03-23 | 中建八局第三建设有限公司 | Waterproof construction method for underground engineering |
| CN110747899B (en) * | 2019-10-23 | 2022-04-19 | 上海东方雨虹防水技术有限责任公司 | Basement waterproof construction method |
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Address after: Research Building, Xiniupi Science and Technology Park, No. 68, Naluopo 4th Team, Sitang Community, Santang Town, Xingning District, Nanning City, Guangxi Zhuang Autonomous Region, 530000 Applicant after: Xiniupi Waterproof Technology Co.,Ltd. Address before: 530000 Donggouling Landscape Road, Xingning District, Nanning City, Guangxi Zhuang Autonomous Region, Lin18 Sunshine Green City, 1 Building, 1 Unit 4 Applicant before: GUANGXI GOLDEN UMBRELLA WATERPROOFING Co.,Ltd. |
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