CN104088296A - Soft soil area basement layer adding construction method - Google Patents
Soft soil area basement layer adding construction method Download PDFInfo
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- CN104088296A CN104088296A CN201410363941.1A CN201410363941A CN104088296A CN 104088296 A CN104088296 A CN 104088296A CN 201410363941 A CN201410363941 A CN 201410363941A CN 104088296 A CN104088296 A CN 104088296A
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Abstract
The invention discloses a soft soil area basement layer adding construction method. The method includes the following steps that firstly, a newly-added supporting and protecting wall is constructed on the inner side of an original finished supporting and protecting wall in a soft soil area basement; secondly, earth excavating and support erecting are conducted, and a reinforced concrete surrounding purlin is arranged at the elevation position of the top of the newly-added supporting and protecting wall; thirdly, downward excavating is conducted continuously until a pit bottom is reached, and local over-excavation is conducted on the adjacent corner positions of the layer adding pit bottom and the newly-added supporting and protecting wall; fourthly, a structural base board is poured, and the local over-excavation position is provided with an inverted bracket structure; fifthly, the part, located between the reinforced concrete surrounding purlin and the structural base board, of the newly-added supporting and protecting wall is removed in a chiseling mode; sixthly, supporting frames are detached layer by layer and floors are poured layer by layer until a structural roof is completed. According to the soft soil area basement layer adding construction method, on the premise that the overall safety and reliability of the basement are not affected, the part, occupying the area of the layer adding basement, of the newly-added supporting and protecting wall is removed in the chiseling mode, and the occupation on the building area of the basement by the newly-added supporting and protecting wall in the back constructing stage is effectively avoided.
Description
Technical field
The present invention relates to Construction Technique of Underground Works field, relate in particular to a kind of soft clay area basement and add a layer construction method.
Background technology
In the Construction of Basement of soft clay area, owing to integrally descending the reason such as space planning adjustment, basement Function Extension to cause to have implemented pattern foundation pit supporting structure wall length or intensity and can not meet the requirement that the excavation of foundation pit degree of depth is deepened in region, and simple employing set up row's support wall formation composite support system and can be solved the safety problem in excavation of foundation pit in existing support wall inner side, but how safe and reliable, eliminate back newly-increased support wall of the stage of building is unsolved technical barrier still on " occupying " impact of basement building area practically.
Therefore, the applicant be devoted to develop one can be practically for soft clay area basement adds layer construction, and can not occupy the soft clay area basement that adds layer building area and add a layer construction method.
Summary of the invention
Because the above-mentioned deficiency of prior art, the present invention proposes one can construct for soft clay area basement adds layer practically, and can not occupy the soft clay area basement that adds layer building area and add a layer construction method.
For achieving the above object, the invention provides a kind of soft clay area basement and add a layer construction method, comprise the following steps:
Step 1, implement newly-increased support wall in the completed original support wall of soft clay area basement inner side.
Step 2, carry out soil excavation and support is established by the construction method of traditional cut and cover method foundation ditch, in described newly-increased support wall wall top mark eminence, steel bar concrete is set and encloses purlin, the vertical reinforcement of described newly-increased support wall anchors into described steel bar concrete and encloses in purlin, and described steel bar concrete encloses purlin and also links together with described original support wall.
Step 3, continue to dig downwards to adding an end, layer hole, and carry out part and backbreak adding the layer end, a hole corner positions adjacent with described newly-increased support wall.
Step 4, pouring structure base plate, and backbreak on position and arrange bracket structure in the described part, the end, layer hole that adds, described bracket structure is connected on described newly-increased support wall and described structure base slab, the support after described structure base slab reaches design strength below dismounting.
Step 5, cut described newly-increased support wall and enclose the part between purlin and structure base slab in described steel bar concrete.
Step 6, successively remove support, water build floor until the completing of structure roof along the construction method of building basement by open cut.
Preferably, the described newly-increased support wall in described step 1 is constructed along described original support wall inner side, between described newly-increased support wall and described original support wall, is reserved with space, is filled with reinforcing force transfer body in described space.
Preferably, described steel bar concrete in described step 2 encloses purlin and comprises and hang muscle, bar planting and steel concrete, the described muscle one end of hanging is connected on described steel concrete, the other end is fixed in described original support wall, implant in described original support wall one end of described bar planting, and the other end is implanted in described steel concrete.
Preferably, the described soft clay area basement before construction is not underground double-layer structure, and the described soft clay area basement after construction is F3/B3 structure.
It is as follows that soft clay area of the present invention basement adds the beneficial effect of layer construction method:
1) mode that utilization of the present invention adds newly-increased support wall provides and goes along with sb. to guard him basis for further adding layer construction, be convenient to the safe excavation that basement adds the earthwork of layer work progress, steel bar concrete is set on the wall top of newly-increased support wall simultaneously to be enclosed purlin and carries out part and backbreak and add down bracket structure adding a layer end, hole, not only realize the further consolidation to newly-increased support wall, and be convenient to reach after design strength at structure base slab, under the prerequisite of general safety reliability that does not affect basement, the newly-increased support wall part that adds layer basement area to occupying cuts, effectively eliminate back newly-increased support wall occupying basement building area of the stage of building.
2) the present invention sets up the newly-increased support wall of a row in original support wall inner side, and in reserved space, is filled with reinforcing force transfer body between described newly-increased support wall and described original support wall, has realized the reliable composite support system of structure.
3) steel bar concrete is set encloses purlin and realized effective connection of the old and new's support wall on newly-increased support wall wall top.
4) backbreak on position and arrange bracket structure in the described part, the end, layer hole that adds, realized effective transmission of foundation ditch horizontal force and ensured the integrality of structure base slab.
Below with reference to accompanying drawing, the technique effect of design of the present invention, concrete structure and generation is described further, to understand fully object of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is that specific embodiment soft clay area basement adds layer construction operating mode one.
Fig. 2 is that specific embodiment soft clay area basement adds layer construction operating mode two.
Fig. 3 is that specific embodiment soft clay area basement adds layer construction operating mode three.
Fig. 4 is that specific embodiment soft clay area basement adds layer construction operating mode four.
Fig. 5 is that specific embodiment soft clay area basement adds layer construction operating mode five.
Fig. 6 is the A place enlarged diagram of Fig. 2.
Fig. 7 is the B place enlarged diagram of Fig. 3.
Detailed description of the invention
As shown in the figure, a kind of soft clay area basement of the present embodiment adds a layer construction method, implementing to add layer by underground two layers is F3/B3, the described soft clay area basement before not constructing is underground double-layer structure, described soft clay area basement after construction is F3/B3 structure, specifically comprises the following steps:
Step 1, as shown in Figure 1, implements newly-increased support wall 2 in the completed original support wall of soft clay area basement 1 inner side.
Step 2, as shown in Figure 2 and Figure 6, carry out soil excavation and arrange to support setting up by the construction method of traditional cut and cover method foundation ditch, in newly-increased support wall 2 wall top mark eminences, steel bar concrete is set and encloses purlin 5, the vertical reinforcement of newly-increased support wall 2 anchors into steel bar concrete and encloses in purlin 5, and steel bar concrete encloses purlin 5 and also links together with original support wall 1.
Step 3, as shown in Figure 2, continues to dig downwards to adding a layer end 4, hole, and carries out part and backbreak adding the layer end 4, a hole corner positions adjacent with newly-increased support wall 2.
Step 4, as shown in Figure 3 and Figure 7, pouring structure base plate 6, and backbreak on position and arrange bracket structure 7 adding a part, the ends 4, layer hole, the bracket structure 7 that falls is connected on newly-increased support wall 2 and structure base slab 6, removes the support 3 of below after structure base slab 6 reaches design strength.
Step 5, as shown in Figure 4, cuts newly-increased support wall 2 and encloses the part between purlin 5 and structure base slab 6 in steel bar concrete.
Step 6, as shown in Figure 5, successively removes support, waters build floor until the completing of structure roof along the construction method of building basement by open cut.
Concrete, the newly-increased support wall 2 of the present embodiment in described step 1 constructed along original support wall 1 inner side, is reserved with space, as shown in Figure 1 between newly-increased support wall 2 and original support wall 1, in described space, be filled with and reinforce force transfer body 8, form the composite support system of reliable in structure.As shown in Figure 6, steel bar concrete described in the present embodiment in step 2 encloses purlin 5 and comprises and hang muscle 51, bar planting 52 and steel concrete 53, hanging muscle 51 one end is connected on steel concrete 53, the other end is fixed in original support wall 1, implant in original support wall 1 one end of bar planting 52, and the other end is implanted in steel concrete 53.
Exemplary, as shown in the figure, the present embodiment is applied in the Soft Deep Foundation Pit of underground two layers, be positioned at the medial surface place of original support wall 1 of Foundation Pit bottom, form and carry out the newly-increased support wall 2 of a row towards construct multiple bored piles of excavation of foundation pit depth direction, and on space reserved between newly-increased support wall 2 and the binding face of original support wall 1, utilize rotary churning pile to inject concrete grout and tamp formation reinforcing force transfer body 8, original support wall 1, reinforcing force transfer body 8 and newly-increased support wall 2 threes effectively connects as one, construct and formed the reliable composite support system of structure, provide and go along with sb. to guard him basis for further adding layer construction, be convenient to the safe excavation that basement adds the earthwork of layer work progress, steel bar concrete is set on the wall top of newly-increased support wall 2 simultaneously to be enclosed purlin 5 and carries out part and backbreak and add down bracket structure 7 adding a layer end 4, hole, not only realize the further consolidation to newly-increased support wall 2, and be convenient to reach after design strength at structure base slab 6, under the prerequisite of general safety reliability that does not affect basement, newly-increased support wall 2 parts that add layer basement area to occupying cut, effectively eliminate back newly-increased support wall 2 occupying basement building area of the stage of building.Wherein, newly-increased support wall 2 walls tops arrange steel bar concrete encloses purlin 5 and has realized effective connection of the old and new's support wall, backbreaks on position and arranges bracket structure 7 adding a part, the ends 4, layer hole, has realized effective transmission of foundation ditch horizontal force and has ensured the integrality of structure base slab 6.In addition, the present embodiment is also filled with and reinforces force transfer body 8 in reserved space between newly-increased support wall 2 and original support wall 1, has constructed the reliable composite support system of structure.
Certainly, the present invention can also carry out layer construction that add of two-layer or more multi-layered number as required to the different basement of the number of plies, the construction method of traditional cut and cover method foundation ditch that the present embodiment relates to and open cut are prior art along the construction method of building basement, those skilled in the art can use for reference in accordance with the teachings of the present invention prior art and construct, and repeat no more herein.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just can design according to the present invention make many modifications and variations without creative work.Therefore, all technician in the art, all should be in by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (4)
1. soft clay area basement adds a layer construction method, it is characterized in that, comprises the following steps:
Step 1, implement newly-increased support wall in the completed original support wall of soft clay area basement inner side;
Step 2, carry out soil excavation and support is established by the construction method of traditional cut and cover method foundation ditch, in described newly-increased support wall wall top mark eminence, steel bar concrete is set and encloses purlin, the vertical reinforcement of described newly-increased support wall anchors into described steel bar concrete and encloses in purlin, and described steel bar concrete encloses purlin and also links together with described original support wall;
Step 3, continue to dig downwards to adding an end, layer hole, and carry out part and backbreak adding the layer end, a hole corner positions adjacent with described newly-increased support wall;
Step 4, pouring structure base plate, and backbreak on position and arrange bracket structure in the described part, the end, layer hole that adds, described bracket structure is connected on described newly-increased support wall and described structure base slab, the support after described structure base slab reaches design strength below dismounting;
Step 5, cut described newly-increased support wall and enclose the part between purlin and structure base slab in described steel bar concrete;
Step 6, successively remove support, water build floor until the completing of structure roof along the construction method of building basement by open cut.
2. soft clay area as claimed in claim 1 basement adds a layer construction method, it is characterized in that: the described newly-increased support wall in described step 1 is constructed along described original support wall inner side, between described newly-increased support wall and described original support wall, be reserved with space, in described space, be filled with reinforcing force transfer body.
3. soft clay area as claimed in claim 1 basement adds a layer construction method, it is characterized in that: the described steel bar concrete in described step 2 encloses purlin and comprises and hang muscle, bar planting and steel concrete, the described muscle one end of hanging is connected on described steel concrete, the other end is fixed in described original support wall, implant in described original support wall one end of described bar planting, and the other end is implanted in described steel concrete.
4. the soft clay area basement as described in claim 1-3 any one adds a layer construction method, it is characterized in that: the described soft clay area basement before construction is not underground double-layer structure, and the described soft clay area basement after construction is F3/B3 structure.
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| CN201410363941.1A CN104088296B (en) | 2014-06-24 | 2014-07-29 | Soft clay area basement adds a layer construction method |
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| CN201410286445.0 | 2014-06-24 | ||
| CN201410286445 | 2014-06-24 | ||
| CN201410363941.1A CN104088296B (en) | 2014-06-24 | 2014-07-29 | Soft clay area basement adds a layer construction method |
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| CN104088296A true CN104088296A (en) | 2014-10-08 |
| CN104088296B CN104088296B (en) | 2016-02-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119711A (en) * | 2017-07-06 | 2017-09-01 | 中国铁路设计集团有限公司 | A kind of connected structure and construction method for abutting existing transfer station on a large scale |
| CN107761742A (en) * | 2017-10-23 | 2018-03-06 | 上海市城市建设设计研究总院（集团）有限公司 | Along depth direction is multi-form, variable cross-section supporting construction and its construction method |
| CN110616714A (en) * | 2019-09-12 | 2019-12-27 | 上海建工集团股份有限公司 | Novel enclosure construction method for existing underground structure deepening |
| CN110616738A (en) * | 2019-09-12 | 2019-12-27 | 上海建工集团股份有限公司 | Underground space vertical building construction method and structure |
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| JPH03262833A (en) * | 1990-03-14 | 1991-11-22 | Taisei Corp | Construction of underground floor |
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| CN102493487A (en) * | 2011-12-13 | 2012-06-13 | 上海市第一建筑有限公司 | Method for constructing foundation slab embedded with concrete supports |
| CN103195085A (en) * | 2013-04-02 | 2013-07-10 | 东南大学 | Downward story-adding basement and construction method thereof |
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| EP0382608A1 (en) * | 1989-02-07 | 1990-08-16 | Sondages Injections Forages "S.I.F." Entreprise Bachy | Method of making an excavation by the trench wall technique involving the use of releasably prestressed floor elements |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119711A (en) * | 2017-07-06 | 2017-09-01 | 中国铁路设计集团有限公司 | A kind of connected structure and construction method for abutting existing transfer station on a large scale |
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| CN107761742A (en) * | 2017-10-23 | 2018-03-06 | 上海市城市建设设计研究总院（集团）有限公司 | Along depth direction is multi-form, variable cross-section supporting construction and its construction method |
| CN110616714A (en) * | 2019-09-12 | 2019-12-27 | 上海建工集团股份有限公司 | Novel enclosure construction method for existing underground structure deepening |
| CN110616738A (en) * | 2019-09-12 | 2019-12-27 | 上海建工集团股份有限公司 | Underground space vertical building construction method and structure |
| CN110616714B (en) * | 2019-09-12 | 2021-07-23 | 上海建工集团股份有限公司 | Novel enclosure construction method for existing underground structure deepening |
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| CN104088296B (en) | 2016-02-10 |
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Address after: 200011 Tibet South Road, Shanghai, No. 1170, No. Patentee after: Shanghai urban construction design & Research Institute (Group) Co., Ltd. Address before: 200011 Tibet South Road, Shanghai, No. 1170, No. Patentee before: Shanghai Urban Construction Design & Research Institute |