CN210636441U - Guide partition wall - Google Patents

Guide partition wall Download PDF

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Publication number
CN210636441U
CN210636441U CN201920995459.8U CN201920995459U CN210636441U CN 210636441 U CN210636441 U CN 210636441U CN 201920995459 U CN201920995459 U CN 201920995459U CN 210636441 U CN210636441 U CN 210636441U
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underground
water
reinforced concrete
plate
guide
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CN201920995459.8U
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贾坚
谢小林
翟杰群
杨科
郭晓航
刘磊
方银钢
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Architecture Design and Research Institute of Tongji University Group Co Ltd
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Architecture Design and Research Institute of Tongji University Group Co Ltd
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Abstract

The utility model provides a direction partition wall. The guide partition wall is positioned in the underground structure and comprises reinforced concrete walls arranged oppositely on two sides, and the space between the reinforced concrete walls on the two sides is used for arranging a foundation pit enclosure structure; the reinforced concrete wall extends downwards from the top plate of the underground structure to the bottom plate of the underground structure, a reinforced steel bar assembly is arranged in each reinforced concrete wall, and the lower end of each reinforced steel bar assembly is implanted into the bottom plate of the underground structure. The utility model separates the operation area of the foundation pit support structure from other areas of the underground structure, on one hand, the underground water can be prevented from flowing into other non-operation areas; on the other hand, enough wall protection slurry liquid level height can be formed, and the collapse of the soil wall is avoided; the direction partition wall still plays and consolidates the reinforcement to existing underground structure. The utility model provides a direction partition wall to this specific condition of existing underground structure, it is big to have avoided work progress safety risk, and the construction cycle is long, shortcoming such as economic nature is poor.

Description

Guide partition wall
Technical Field
The utility model relates to a construction field especially relates to a direction partition wall that is used for existing underground structure's foundation ditch retaining structure.
Background
In the development process of urban construction, urban underground spaces are widely developed and utilized. However, with the development of the urbanization process, the functional requirements of people on the underground space are gradually improved, some existing underground structures cannot adapt to new functional requirements gradually, and the improvement work of dismantling, expanding, even excavating and adding layers and the like on the existing underground structures is a necessary trend of the development of the urban underground space in future.
The excavation and layer-adding construction of the underground structure relates to the problem of carrying out the construction of a foundation pit enclosure structure in the existing underground structure. When the groundwater level is higher than the bottom plate of the existing underground structure, the following problems can be faced when the building envelope construction is carried out in the existing underground structure:
the holes formed in the existing bottom plate can cause the burst of underground water, so that the construction operation cannot be carried out in the existing underground structure. In addition, underground water and foundation soil are flushed into the basement, so that surrounding environment settlement is caused, and disturbance influence is caused on facilities such as surrounding buildings, pipelines and roads.
When the building enclosure is constructed in a high water level area, wall protection slurry is generally needed to balance the water and soil lateral pressure at the deep part of the groove section, so that the soil wall collapse during the construction of the building enclosure is avoided. The theoretical height of the liquid level of the retaining wall slurry is generally close to the buried depth of underground water, namely the liquid level of the retaining wall slurry is higher than that of the bottom plate of the existing underground structure, so measures must be added to ensure the liquid level of the slurry.
In the face of the above engineering problems, the following two conventional methods are currently employed:
the building envelope is expanded to the outside of the existing basement so as to avoid the building envelope being constructed in the basement.
And backfilling the soil body in the whole hall in the existing underground chamber, wherein the soil filling height is higher than the underground water level and is as close to the ground as possible.
In various building dense areas such as a central urban area and the like, the method (1) is often limited by a protected red line or a site environment, and the enclosure structure cannot be expanded; under the influence of vertical members in the existing underground structure, the method (2) -full backfilling construction difficulty is high, the filled soil is not dense, the operation of heavy construction equipment is not facilitated, and the problem of slurry flowing or wall collapse is easy to occur during the construction of the enclosure structure. In addition, the method (1) or the method (2) has a drawback that the amount of work is increased by several times, which results in a high safety risk, a long construction period, and poor economy.
In conclusion, in the excavation and storey-adding reconstruction work of the existing underground structure, the problems of high safety risk, long construction period and high construction cost of the existing outward-expanding enclosure structure or full soil body backfill exist, the green construction requirements of modern construction on low risk, high efficiency and low cost cannot be met more and more, and the technical problem that how to avoid the safety risk, improve the working efficiency and construction quality of the excavation and storey-adding reconstruction of the existing underground structure and reduce the labor cost and the labor intensity of workers are urgently needed to be solved by technical personnel in the field is solved.
SUMMERY OF THE UTILITY MODEL
Based on this, it is necessary to provide a direction partition wall to solve the problems of large safety risk, low working efficiency and high construction cost in the existing underground structure excavation and storey-adding reconstruction work.
A guide partition wall is positioned in an underground structure and comprises reinforced concrete walls arranged oppositely on two sides, and a space between the reinforced concrete walls on the two sides is used for arranging a foundation pit enclosure structure; the reinforced concrete wall extends downwards from the top plate of the underground structure to the bottom plate of the underground structure, a reinforced steel bar assembly is arranged in each reinforced concrete wall, and the lower end of each reinforced steel bar assembly is implanted into the bottom plate of the underground structure.
Above-mentioned direction partition wall has solved the groundwater that appears when high groundwater level area carries out excavation and adds layer transformation work to existing underground structure and has gushed the problem suddenly to and when carrying out envelope construction, can't ensure enough dado mud liquid level height and cause the embankment scheduling problem that collapses. The guide partition walls are built on two sides of the planned foundation pit enclosure structure in the existing underground structure, so that the operation area of the foundation pit enclosure structure is separated from other areas of the underground structure, and on one hand, underground water can be prevented from flowing into other non-operation areas when a bottom plate of the underground structure is broken; on the other hand, when the foundation pit support structure is constructed, the wall protection slurry liquid level height close to the underground water burial depth can be formed, and the collapse of the soil wall is avoided; in addition, the construction of direction partition wall does not receive the restriction of site environment, can not receive the influence of the inside vertical component of underground structure, the construction degree of difficulty is little, the lower extreme of vertical muscle is implanted in underground structure's bottom plate, bonding strength between the existing underground structure of reinforced concrete wall that this kind of design can guarantee the back pouring and the existing underground structure of pouring earlier, reinforced concrete wall performance is improved, the safety of the whole process is reformed transform in the existing underground structure excavation layer-adding, the reinforcing bar subassembly plays the effect of consolidating the reinforcement to existing underground structure, the vertical bearing capacity of existing underground structure has been improved, in order to satisfy the operation requirement of heavy construction equipment on existing structure roof, wall collapse or mud gush the problem also can not appear during the envelope construction.
In one embodiment, the steel bar assembly comprises vertical bars which are vertically arranged, the lower ends of the vertical bars are embedded into a bottom plate of the underground structure, a plurality of rows of horizontal bars are arranged on one side of each vertical bar, and the vertical bars are fixedly connected with the corresponding horizontal bars.
In one embodiment, the vertical ribs and the corresponding horizontal ribs are fixedly connected through steel wire bundling or fixedly connected through welding.
In one embodiment, a waterproof structure is arranged at the joint between the reinforced concrete wall and the bottom plate of the underground structure.
In one embodiment, the waterproof structure comprises a plurality of water-stopping grouting guide pipes arranged at intervals, one end of each water-stopping grouting guide pipe is downwards buried in the reinforced concrete wall, and the other end of each water-stopping grouting guide pipe is exposed out of the reinforced concrete wall.
In one embodiment, the waterproof structure comprises at least one water stop strip, the water stop strip is arranged along the extending direction of a joint where the reinforced concrete wall and the bottom plate are connected, and the water stop strip comprises a groove and a groove filler which are arranged on the surface of the bottom plate of the underground structure.
In one embodiment, the waterproof structure is a concave-convex groove water blocking structure, the concave-convex groove water blocking structure comprises a plurality of rectangular grooves formed in the surface of a bottom plate of the underground structure and a plurality of rectangular teeth formed in the bottom surface of the reinforced concrete wall, and the rectangular teeth are respectively inserted into the corresponding rectangular grooves.
In one embodiment, the groove filler is a water-swellable sealant.
The above-described wire partition wall has at least the following advantageous technical effects:
(1) the work efficiency is effectively improved, the guide partition wall only needs to be arranged according to design requirements, the foundation pit enclosure structure is constructed in the guide partition wall, the foundation pit enclosure structure does not need to be expanded outwards or the full soil body is backfilled, the construction difficulty is greatly reduced, the construction engineering quantity is greatly reduced, and the efficiency of the improvement work of excavating the existing underground structure of the added layer is directly improved.
(2) The construction safety risk of the foundation pit enclosure structure is reduced, the guide partition wall separates the operation area of the foundation pit enclosure structure from other areas of the underground structure, and on one hand, the underground water can be prevented from flowing into other non-operation areas when a bottom plate of the underground structure is broken; on the other hand, when the foundation pit enclosure structure is constructed in the range surrounded by the guide partition walls, the height of the slurry level of the enclosure wall close to the underground water burial depth can be formed, and the collapse of the soil wall is avoided; in addition, the guide partition wall can also be used for reinforcing the existing underground structure, the vertical bearing capacity of the existing underground structure is improved, the operation requirement of heavy construction equipment on the top plate of the existing structure is met, and the problem of wall collapse or slurry channeling can not occur during the construction of the foundation pit support structure.
(3) The construction cost of the foundation pit support structure is reduced, the phenomena of surging of underground water and collapse of a soil wall can be avoided only by constructing the waterproof guide partition walls in a certain range on two sides of the foundation pit support structure, the problem that the vertical bearing capacity of the existing underground structure cannot support the load of large-scale construction machinery is also solved, other constructions are not needed, the engineering quantity is greatly reduced, and the investment cost of manpower, material resources and financial resources in the construction process is reduced.
Because there is above advantage, the utility model discloses can avoid safe risk, can improve work efficiency and the construction quality that excavation increases the layer and reforms transform existing underground structure, reduce human cost and workman intensity of labour, accord with low risk, high efficiency, the green construction requirement of low cost of modernized building construction more.
Drawings
Fig. 1 is a cross-sectional view of a guide partition and a foundation pit enclosure according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
fig. 3 is a schematic view of a waterproof structure according to an embodiment of the present invention;
fig. 4 is a schematic view of a waterproof structure according to another embodiment of the present invention;
fig. 5 is a schematic view of a waterproof structure according to still another embodiment of the present invention;
fig. 6-10 are schematic construction diagrams of steps of a construction method of a foundation pit support structure according to an embodiment of the present invention.
In the figure: 1-underground structure, 2-guide partition wall, 3-foundation pit support structure, 4-filler, 5-obstacle clearing machine, 11-top plate, 12-intermediate plate, 13-bottom plate, 21-vertical rib, 22-horizontal rib, 23-reinforcement cage, 24-waterproof structure, 25-template, 26-water-stopping grouting guide pipe, 27-external water-stop belt, 28-internal water-stop belt, 30-rectangular groove, 31-rectangular tooth, 32-groove, 33-groove filler and 201-reinforced concrete wall.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Those of ordinary skill in the art will recognize that variations and modifications of the various embodiments described herein can be made without departing from the scope of the invention, which is defined by the appended claims. Moreover, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 and 2, the utility model discloses a direction partition wall 2 in the embodiment is located among the underground structure 1 of existing building, underground structure 1 includes roof 11 of underground structure 1, intermediate lamella 12 of underground structure 1 and the bottom plate 13 of underground structure 1, direction partition wall 2 includes the relative reinforced concrete wall 201 that sets up in two sides, the space range between two sides reinforced concrete wall 201 is used for setting up foundation ditch envelope 3, reinforced concrete wall 201 extends to the bottom plate 13 of underground structure 1 from roof 11 of underground structure 1 downwards, be provided with the reinforcing bar subassembly in each reinforced concrete wall 201, the lower extreme of reinforcing bar subassembly is planted in the bottom plate of underground structure. The design can ensure the bonding strength between the later poured reinforced concrete wall 201 and the previously poured existing underground structure 1, improve the performance of the reinforced concrete wall 201 and ensure the safety of the whole process of excavating, layer-adding and reforming the existing underground structure 1. When the reinforced concrete wall 201 is manufactured, the formworks 25 can be supported outside two sides of the reinforced bar assembly at a certain distance, concrete is poured in the space between the two formworks 25, and the reinforced concrete wall can be formed after maintenance.
The guide partition wall 2 is used for solving the problem that the underground water gushes suddenly when the existing underground structure 1 is excavated and layer-added in a high underground water level area and the problem that the soil wall collapses because the slurry liquid level of the sufficient retaining wall cannot be guaranteed when the enclosure structure is constructed. The guide partition walls 2 are built on two sides of the planned foundation pit enclosure structure in the existing underground structure 1, so that the operation area of the foundation pit enclosure structure 3 is separated from other areas of the underground structure 1, and on one hand, the phenomenon that water flows into other non-operation areas when the bottom plate 13 of the underground structure 1 is broken can be avoided; on the other hand, when the foundation pit support structure 3 is constructed, the wall protection slurry liquid level height close to the underground water burial depth can be formed, and the collapse of the earth wall is avoided; in addition, the direction partition wall 2 construction degree of difficulty is little, and the reinforcing bar subassembly plays and consolidates the effect of reinforcement to existing underground structure, has improved existing underground structure 1's vertical bearing capacity, can satisfy the operation requirement of heavy construction equipment on underground structure roof 11, can not appear collapsing wall or mud during the construction and scurry the problem of gushing.
Referring to fig. 1, in some embodiments, the reinforcement assembly includes a vertical rib 21 vertically disposed, a lower end of the vertical rib 21 is embedded in the bottom plate 13 of the underground structure 1, a plurality of rows of horizontal ribs 22 are disposed on an outer side of the vertical rib 21, and the vertical rib 21 is fixedly connected to the corresponding horizontal rib 22 to form a reinforcement cage 23. The lower ends of the vertical ribs 21 are embedded in the bottom plate of the underground structure, so that the bonding strength between the later-poured reinforced concrete wall 201 and the previously-poured underground structure 1 can be fully ensured, the performance of the reinforced concrete wall 201 is improved, and the safety of the whole process of excavating, layer-adding and reconstructing the existing underground structure is ensured; the reinforcing cage 23 formed by the vertical ribs 21 and the corresponding horizontal ribs 22 has better overall support degree and stability, has stronger reinforcing effect on the existing underground structure, improves the vertical bearing capacity of the existing underground structure, better meets the operation requirement of heavy construction equipment on the top plate of the existing structure, and does not have the problem of wall collapse or slurry channeling during the construction of the enclosure structure. According to the practical engineering experience, the vertical ribs 21 and the corresponding horizontal ribs 22 are fixedly connected through steel wire bundling or fixedly connected through a welding mode. It will be appreciated that in other embodiments, the rebar assembly may also be a single vertical rebar 21 or other form of rebar structure, without limitation.
Referring to fig. 1 and 2, in some embodiments, in order to better prevent the underground from seeping to a non-construction area during the construction process and avoid affecting the normal construction, a waterproof structure 24 is provided at the joint between each reinforced concrete wall 201 and the bottom plate 13 of the underground structure 1.
Referring to fig. 2 and 3, in an embodiment of the present invention, the waterproof structure 24 includes a plurality of water-stopping grouting pipes 26 arranged at intervals, one end of each water-stopping grouting pipe 26 is buried downward in the reinforced concrete wall 201, and the other end horizontally exposes the reinforced concrete wall 201 outward; the grouting liquid with certain pressure is forcibly injected into the pore soil layers among the soil layer particles of the joint between the reinforced concrete 201 and the bottom plate 13 of the underground structure 1 through the water-stop grouting guide pipe 26 by using a grouting pump, so that the effects of compaction and filling are achieved, and part or most of water and air in the pores of the soil layer are forced to be discharged, thereby accelerating the consolidation stability of the soil layer, preventing or controlling water flow and improving the soil structure. The grouting liquid is prepared by adding a proper amount of water glass into superfine cement slurry. After the grouting liquid is injected into the stratum, the water glass slurry and the ingredients can react with calcium carbonate in the soil layer to generate silica gel; the cement is cemented with the soil particles and other fillers in the soil layer. The grouting liquid passes through the holes in the soil layer to play the roles of splitting and seepage filling, and the positions where the grouting liquid passes are firmly cemented with the soil layer. Preferably, the water-stopping grouting guide pipe 26 may be L-shaped, one end of the water-stopping grouting guide pipe 26 is vertically buried in the reinforced concrete wall downwards, and the other end is horizontally exposed out of the reinforced concrete wall. The L-shaped water-stopping grouting guide pipe 26 is simple in shape, and is beneficial to enabling grouting liquid to smoothly enter the pore soil layers among the soil layer particles of the joint between the reinforced concrete 201 and the bottom plate 13.
The waterproof structure 24 may be a water stop. Referring specifically to fig. 4, in another embodiment, the waterproof structure 24 includes two outer water stops 27 and two inner water stops 28 arranged side by side, the inner water stops 28 and the outer water stops 27 are both arranged along the extending direction of the joint where the reinforced concrete wall 201 meets the bottom plate 13, and the inner water stops 28 and the outer water stops 27 each include a groove 32 and a groove filler 33 provided on the surface of the bottom plate 13 of the underground structure 1. The groove filler 33 can absorb water and expand by self water absorption factors after meeting water, so that the volume expansion of the groove filler is increased, the gap between the new concrete and the old concrete is compacted to form a waterproof plastic colloid, the gap is thoroughly blocked, and the water-stopping effect is achieved. Engineering practice proves that the water-swelling sealant is a groove filler 33 with excellent performance, is a single-liquid water-swelling, moisture-curing and elastic sealing sealant, and has good sealing and water-stopping effects. Once the water-swelling sealant is hardened, the water-swelling sealant becomes a rubber elastomer with good recovery property, and the self volume is expanded after being soaked in water, and the gap is filled to play a role in sealing and water stopping. The water-stopping material can be used as a water-stopping material around a water channel in civil engineering and building engineering, and has extremely wide application range.
Referring to fig. 5, in a further embodiment, the waterproof structure 24 is a concave-convex groove water-blocking structure, the concave-convex groove water-blocking structure includes a plurality of rectangular grooves 30 disposed on the surface of the bottom plate 13 of the underground structure 1 and a plurality of rectangular teeth 31 disposed on the lower end surface of the reinforced concrete wall 201, and the rectangular teeth 31 are respectively inserted into the corresponding rectangular grooves 30. The engaged rectangular grooves 30 and the rectangular teeth 31 form a labyrinth seal, which is a non-contact seal, preventing the fluid from leaking outward by increasing the local loss of the fluid to consume its energy.
Furthermore, the utility model also provides a construction method of direction partition wall, including following step:
step 1: according to design requirements, lofting is carried out on a bottom plate 13 of the underground structure 1, and the positions of the two reinforced concrete walls 201 are determined within a preset range of two sides of the position where the foundation pit enclosure structure 3 is planned to be built, so that the position of the guide partition wall 2 is determined;
step 2: implanting vertical ribs 21 on a bottom plate 103 of the underground structure 1 corresponding to the position of the reinforced concrete wall 201, wherein the vertical ribs 21 extend downwards from a top plate 11 of the underground structure 1 to a bottom plate 13 of the underground structure 1, and referring to fig. 2, in order to improve the supporting degree, two vertical ribs 21 are arranged in parallel; arranging a plurality of rows of horizontal ribs 22 on one side of the vertical ribs 21, and fixedly connecting the vertical ribs 21 with the corresponding horizontal ribs 22 to form a reinforcement cage 23; and
and step 3: and (3) supporting templates 25 at a certain distance outside two sides of the reinforcement cage 23, pouring concrete, and curing to form a guide partition wall 2 for the foundation pit enclosure structure 3 of the existing underground structure 1.
The installation mode of the steel reinforcement cage 23 is flexible, and the arrangement positions of the vertical ribs 21 and the horizontal ribs 22 can be finely adjusted at any time according to the size of an actual installation space. In other embodiments, the reinforcement cage 23 may be fabricated on the ground in advance as required, and the lower end of the reinforcement cage 23 is embedded into the bottom plate 13 of the underground structure 1, which is not limited by the present invention.
The vertical ribs 21 and the corresponding horizontal ribs 22 are fixedly connected by steel wire bundling or by welding.
Referring to fig. 2, in an embodiment of the present invention, the present invention further includes: a waterproof structure 24 is provided between the guide walls 2 and the bottom plate 13 of the underground structure 1.
Referring to fig. 3, in an embodiment of the present invention, the waterproof structure 24 includes a plurality of water-stopping grouting pipes 26 disposed at intervals, one end of each water-stopping grouting pipe 26 is downward against the upper surface of the bottom plate 13 of the underground structure 1, and the other end of each water-stopping grouting pipe is exposed out of the corresponding formwork 25.
The waterproof structure 24 may also be a water stop. Referring specifically to fig. 4, in another embodiment of the present invention, the waterproof structure 24 includes two outer water stops 27 and two inner water stops 28 arranged side by side, the inner water stops 28 and the outer water stops 27 are both arranged along the extending direction of the joint where the reinforced concrete wall 201 meets the bottom plate 13, the inner water stops 28 and the outer water stops 27 are both formed by chiseling the groove 32 on the surface of the bottom plate 13 of the underground structure 1, and the groove 32 is filled with the groove filler 33, and the top surface of the groove filler 33 is not lower than the surface of the bottom plate 13 of the underground structure 1. In other embodiments, the water stop may be provided in a plurality of ways, which is not limited by the present invention. Engineering experience has shown that the groove filler 33 is preferably a water-swellable sealant.
Referring to fig. 5, in still another embodiment of the present invention, the waterproof structure 24 includes that the concave-convex groove blocks water, and the concave-convex groove blocks water and includes the rectangular channel 30 that sets up at a plurality of intervals chiseled out on the surface of the bottom plate 13 of the underground structure 1, and at the in-process of pouring the reinforced concrete wall 201, the terminal forms the rectangular tooth 31 in the position that corresponds the rectangular channel 30 under the reinforced concrete wall 201, and the rectangular channel 30 and the rectangular tooth 31 mesh with each other, form labyrinth seal, prevent or reduce rivers from inboard seepage flow to the outside.
Additionally, the utility model provides a foundation ditch enclosure 3's construction method, fig. 6-10 are the utility model discloses an embodiment is the construction schematic diagram of each step of foundation ditch enclosure construction method. Specifically, the construction method of the foundation pit enclosure structure comprises the following steps:
step A: referring to fig. 6, the existing underground structure 1 is cleaned, and the proposed foundation pit enclosure 3 is positioned by lofting in the existing underground structure 1 according to design requirements;
and B: referring to fig. 7, the above-described guide partitions 2 are constructed at both sides of a position where the foundation pit envelope 3 is planned according to design requirements;
and C: referring to fig. 8, a portion of the existing underground structure 1 within the range surrounded by the guide walls 2 is chiseled except for the bottom plate 13 of the underground structure 1;
step D: with continued reference to fig. 8, the space enclosed by the guide walls 2 is backfilled with a filler 4;
step E: referring to fig. 9, the bottom plate 13 of the underground structure 1 in the range surrounded by the guide partition wall 2 is removed by removing obstacles hole by the obstacle removing machine 5, and gaps in the holes are backfilled in time after the obstacles are removed in each hole;
the reason for refilling the filler 4 before the bottom plate is broken in this step is that the bottom plate 13 of the existing underground structure 1 is located below the underground water level, so if the bottom plate 13 is directly broken without refilling, underground water and soil can gush into the space surrounded by the guide partition walls 2, which causes water and soil loss and also influences the surrounding environment, and can cause sudden settlement of the bottom plate 13. Therefore, before the bottom plate 13 is broken, the entire space between the guide walls 2 is filled with backfill, and then the bottom plate 13 is broken hole by using a steel casing, and after each hole is broken, the gap in the hole needs to be refilled.
Step F: referring to fig. 10, the construction of the foundation pit enclosure 3 is performed in the space isolated by the guide walls 2, and the foundation pit enclosure 3 is completed. In high water level areas, the foundation pit support structure 3 such as a ground wall, a cast-in-place pile and the like needs to adopt the retaining wall slurry during construction, and when the liquid level of the retaining wall slurry is not lower than the underground water level, the soil body can be ensured not to collapse, namely the liquid level of the retaining wall slurry needs to be higher than the bottom plate 13. If the construction of the diaphragm wall or the row pile is not carried out in the filling material 4, the whole space between the guide partition walls 2 is filled with the wall protection slurry, and the slurry is easy to flow, so that the foundation pit support structure 3 in the step needs to be constructed in the environment filled with soil.
In an embodiment of the present invention, in the step B, the step includes drilling on the surface of the bottom plate 13 of the underground structure 1, inserting the vertical ribs 21 into the corresponding holes, and performing the anti-pulling test after curing for a predetermined time. It also comprises the provision of a waterproofing structure 24 between the guide wall 2 and the bottom 13 of the underground structure 1.
The utility model discloses an in the embodiment, waterproof construction 24 includes the stagnant water slip casting pipe 26 that a plurality of intervals set up, and stagnant water slip casting pipe 26 is L shape and one end top down at the bottom plate 13 upper surface of underground structure 1, and other end level is outside and expose corresponding template 25.
In another embodiment of the present invention, the waterproof structure 24 includes two outer water stops 27 and two inner water stops 28 arranged side by side, the inner water stops 28 and the outer water stops 27 are all arranged along the extending direction of the joint where the reinforced concrete wall 201 meets the bottom plate 13, the inner water stops 28 and the outer water stops 27 are all arranged on the surface of the bottom plate 13 of the underground structure 1 by chiseling the groove 32, and the groove filler 33 is filled in the groove 32, and the top surface of the groove filler 33 is not lower than the surface of the bottom plate 13 of the underground structure 1. In other embodiments, the water stop may be provided in a plurality of ways, which is not limited by the present invention. Engineering experience has shown that the groove filler 33 is preferably a water-swellable sealant.
The utility model discloses in still another embodiment, waterproof construction 24 includes that unsmooth draw-in groove blocks water, and unsmooth draw-in groove blocks water and includes rectangular channel 30 at the parallel arrangement of a plurality of intervals that chisel out on the bottom plate 13 surface of underground structure 1, at concreting reinforced concrete wall 201 in-process, and the terminal forms rectangle tooth 31 in the position that corresponds rectangular channel 30 under reinforced concrete wall 201, and rectangular channel 30 and rectangle tooth 31 intermeshing form labyrinth seal, prevent or reduce rivers from inboard seepage flow to the outside.
In an embodiment of the present invention, in the step D, the filling material 4 is one or a mixture of more of clay, sand and soil mixed with cement.
In an embodiment of the present invention, in the step E, the hole-by-hole rotary removing process is performed by using a steel sleeve, and when the bottom plate 13 of the substructure 1 within the range surrounded by the guide partition wall 2 is removed by using the steel sleeve, the gap generated after the steel sleeve is pulled out is backfilled by using one or more of materials with the same composition as the filler 4, such as clay, sand or cement mixed soil, and the diameter of the steel sleeve is preferably 1.2-1.5 m.
Aiming at high ground water level, when digging the layer-adding transformation to the existing underground structure 1, the utility model provides a direction partition wall 2 and construction method and foundation ditch enclosure 3's construction method builds direction partition wall 2 through the both sides of planning foundation ditch enclosure 3 in existing underground structure 1, has separated foundation ditch enclosure 3's operation area and other regions of existing underground structure 1. On the one hand, the underground water can be prevented from rushing into other non-working areas when the bottom plate 13 of the underground structure 1 is broken; on the other hand, when the foundation pit support structure 3 is constructed, the wall protection slurry liquid level height close to the underground water burial depth can be formed, and the collapse of the earth wall is avoided; in addition, the construction difficulty of direction partition wall 2 is little, still can consolidate the reinforcement to existing underground structure 1, has improved underground structure 1's vertical bearing capacity. The utility model provides a construction method that is used for foundation ditch envelope 3 of existing underground structure 1 and leads partition wall 2 to with this specific condition of existing underground structure 1, it is big to have overcome current method safety risk, and the construction cycle is long, shortcoming such as economic nature is poor, accords with the green construction requirement of low risk, high efficiency, low cost of modern building construction more.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (8)

1. A guide partition wall is characterized by being located in an underground structure and comprising reinforced concrete walls with two opposite surfaces, wherein a space between the reinforced concrete walls is used for arranging a foundation pit enclosure structure; the reinforced concrete wall extends downwards from the top plate of the underground structure to the bottom plate of the underground structure, a reinforced steel bar assembly is arranged in each reinforced concrete wall, and the lower end of each reinforced steel bar assembly is implanted into the bottom plate of the underground structure.
2. The guide partition wall as claimed in claim 1, wherein the reinforcement assemblies comprise vertically arranged vertical ribs, the lower ends of the vertical ribs are embedded in the bottom plate of the underground structure, a plurality of rows of horizontal ribs are arranged on one side of the vertical ribs, and the vertical ribs are fixedly connected with the corresponding horizontal ribs.
3. The guide wall as claimed in claim 2, wherein the vertical ribs are fixedly connected with the corresponding horizontal ribs by steel wire bundling or by welding.
4. The guide wall as claimed in any one of claims 1 to 3, wherein a waterproof structure is provided at a joint between the reinforced concrete wall and the bottom plate of the underground structure.
5. The guide partition wall as claimed in claim 4, wherein the waterproof structure comprises a plurality of water-stopping grouting guide pipes arranged at intervals, one end of each water-stopping grouting guide pipe is downwards buried in the reinforced concrete wall, and the other end of each water-stopping grouting guide pipe is exposed out of the reinforced concrete wall.
6. The guide wall according to claim 4, wherein the waterproof structure comprises at least one water stop, the water stop being disposed along an extension of a seam where the reinforced concrete wall meets the floor, the water stop comprising a groove and a groove filler provided on a surface of the floor of the underground structure.
7. The guide wall of claim 6, wherein the groove filler is a water-swellable sealant.
8. The guide partition wall of claim 4, wherein the waterproof structure is a concave-convex groove water blocking structure, the concave-convex groove water blocking structure comprises a plurality of rectangular grooves formed in the surface of the bottom plate of the underground structure and a plurality of rectangular teeth formed in the bottom surface of the reinforced concrete wall, and the rectangular teeth are respectively inserted into the corresponding rectangular grooves.
CN201920995459.8U 2019-06-28 2019-06-28 Guide partition wall Active CN210636441U (en)

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