CN203222802U - Stepped foundation pit slope supporting structure - Google Patents
Stepped foundation pit slope supporting structure Download PDFInfo
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- CN203222802U CN203222802U CN 201320149974 CN201320149974U CN203222802U CN 203222802 U CN203222802 U CN 203222802U CN 201320149974 CN201320149974 CN 201320149974 CN 201320149974 U CN201320149974 U CN 201320149974U CN 203222802 U CN203222802 U CN 203222802U
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- foundation pit
- slope
- steel baffle
- steel shoe
- pole
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Abstract
The utility model discloses a stepped foundation pit slope supporting structure. A right-angled steel baffle plate is laid on an external corner of each step of a slope; upper and lower adjacent steel baffle plates are fixedly connected by using a supporting rod; the lower end of the bottommost supporting rod is fixedly connected with a wedge body which is fixed to the bottom surface of a foundation pit; and when necessary, the right-angled steel baffle plates can be fixedly connected with anchor cables which are fixedly arranged in the slope soil. After the supporting structure is adopted by the stepped foundation pit slope, the external corner of each step of the slope is protected by each right-angled steel baffle plate, and the upper and lower steel baffle plates are interconnected into a whole by using the supporting rod without moving, so that the shear strength and the integrity of the foundation pit slope soil are greatly improved; and even if the soil is properly stacked on the top and the step of the foundation pit, instability or collapse is not caused. The components such as the supporting rod, the wedge body, the right-angled steel baffle plates and the anchor cables can be disassembled and recycled from bottom to top in sequence to save the materials when the engineering construction is finished and backfill is performed.
Description
Technical field
The utility model relates to building field, particularly stepped ramp type foundation pit stope support structure in a kind of building operations.
Background technology
Along with the exploitation of highrise building and urban underground space, progressively to the depths development, the ratio that the cost of underground construction and construction period account for is increasing for building foundation, even surpasses the upper body structure.Therefore, guarantee that underground engineering construction quality and safety are stubborn problems.Excavation slope is as the important composition key element of underground construction, and its stability concerns the overall situation, and should be placed on space of top prominence.In recent years, the instability of foundation pit cave-in accident is of common occurrence, and the life and property loss that causes is countless, and the importance that excavation slope is stable not only has been described, more engineers and technicians have beaten alarm bell.
Existing Base hole supporting technology mainly comprises homeostasis technology and artificial support technology.Wherein the homeostasis technology mainly contains that to put the slope stable and step stable; Artificial support technology mainly contains plate brad supporting technology, bolting and shotcreting with wire mesh technology, steel sheet pile support technology, anchor cable-header board support technology, campshed support technology, interior support-campshed composite support technology, contrary sequence method technology, freezing process technology and other various complex techniques.These support technologies are to guaranteeing that excavation slope is stable, ensureing that construction quality and safety have important function.
By phenomenon and causal investigation analysis that instability of foundation pit is caved in, the side slope unstability often occurs in the local pressure larger part, the reason key that causes accident is that slope retaining design consideration influence factor is not comprehensive, construction in later period is carried out in strict accordance with job specfication and supporting designing requirement, as: vehicular traffic vibration, mechanical equipment vibration, the preloading of sloping top, sloping top wet trade cause infiltration, etc.Generally speaking, it is many to influence the stable factor of excavation slope, and complicated, not only with internal factor (highly, toe, angle of internal friction, cohesion, the water content of side slope, Deng) relevant, also closely related with various extraneous factors (load, later stage engineering construction, vibration, rainfall, etc.).Wherein, extraneous factor comprises the factor of construction existing existence in early stage, more comprises X factor potential in the construction in later period process.Therefore, the slope retaining design will be considered the internal factor of side slope and the main extraneous factor that may exist simultaneously.But in slope retaining design in the past, to main extraneous factor potential X factor forecasting inaccuracy in the construction in later period process particularly, even ignored exist in the construction in later period process stability of slope is had the load action of significant impact, therefore, there are side slope unstability hidden danger and risk in the construction in later period process, the lighter causes that the foundation ditch work plane is taken by disintegrated earth, and weight person causes the loss of lives and properties.Even second consolidation is carried out in existing supporting, not only can influence normal programming, and the construction quality of second consolidation also can not show a candle to the initial mass of considering major influence factors in the early stage and carrying out the supporting design.
When construction work is in the building dense district, has in limited time near roadway area or construction plant, foundation ditch adopts the step side slope sometimes.In construction in later period; be subjected to the restriction of objective condition; through regular meeting's local engineering material (reinforcing bar, template, steel pipe, reinforcing cage, the lumps of wood, waterproof roll stacked on the top of foundation ditch and step; Deng) and plant equipment (concrete delivery truck, pumping car; Deng) etc. weight; make the external corner of step very easily take place to destroy and unstability, and then cause foundation ditch to cave in.
The utility model content
Problem at above-mentioned prior art existence, the purpose of this utility model provides a kind of stepped ramp type foundation pit stope support structure, shear strength and the globality of the stepped ramp type excavation slope soil body are improved, can be because suitable preloading unstability not being arranged on top and the step, caving in.
For achieving the above object, the stepped ramp type foundation pit stope support structure that the utility model provides, external corner at each step of side slope is laid the perpendicular type steel shoe, and neighbouring steel shoe connects with strut fixation, fixedlys connected with the wedge that is fixed on the foundation ditch bottom surface in the lower end of bottom pole.
For improving supporting intensity, described pole can be adopted double up and down.
Be further to improve supporting intensity, described steel shoe can be fixed on slope soil in anchor cable fixedly connected.
The beneficial effects of the utility model are:
1, after the stepped ramp type excavation slope adopts the utility model supporting and protection structure, the external corner of each step of side slope is protected by the perpendicular type steel shoe, and steel shoe is connected mutually with pole up and down, can not go here and there, thereby the shear strength of the excavation slope soil body and globality are improved greatly, though the top of foundation ditch and step have suitable preloading can unstability yet, cave in;
2, constitute the parts such as pole, wedge, perpendicular type steel shoe and anchor cable of supporting and protection structure, finish in engineering construction and can dismantle successively from bottom to top, recycle when carrying out backfill, save material.
Description of drawings
Fig. 1 is the schematic diagram of the utility model embodiment 1;
Fig. 2 is the schematic diagram of the utility model embodiment 2;
Fig. 3 is the schematic diagram of the utility model embodiment 3;
Fig. 4 is for being positioned at the stereogram of the perpendicular type steel shoe at foundation ditch top among Fig. 1 to Fig. 3;
Fig. 5 is the elevation of pole among Fig. 1 to Fig. 3;
Fig. 6 is the flanged plate elevation of Fig. 5 pole upper and lower end parts;
Fig. 7 is the schematic diagram of wedge among Fig. 1 to Fig. 3.
Among the figure: 1-perpendicular type steel shoe, 2-pole, 3-wedge, 4-railing, 5-anchor cable, 6-installing hole, 7-bolt hole, 8-flanged plate, 9-bayonet socket.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
The utility model supporting and protection structure is applicable to and is in building dense district, limited near roadway area or construction plant, and soil property is better, and the degree of depth is not the stepped ramp type excavation slope of very dark (in the 8m).
Present embodiment is applicable to the stepped ramp type excavation slope that soil shear strength is higher or the top preloading is few.As shown in Figure 1, external corner at each step of side slope is laid perpendicular type steel shoe 1, wherein be positioned at the perpendicular type steel shoe at foundation ditch top as shown in Figure 4, there is installing hole 6 in the front, there is bolt hole 7 side, the railing 4 that is positioned at above the foundation ditch is installed on the perpendicular type steel shoe at top by installing hole, neighbouring steel shoe has as shown in Figure 5 and Figure 6 with two ends, and the pole 2(of flanged plate 8 can make with steel pipe) fixedly connected, wherein the bayonet socket 9(that offers by the wedge upper end of the lower end of nethermost pole and the wedge 3 that is fixed on the foundation ditch bottom surface is as shown in Figure 7) fixedly connected.
Present embodiment is applicable to the stepped ramp type excavation slope that soil shear strength is lower or the top preloading is many.As shown in Figure 2, lay perpendicular type steel shoe 1 ＇ at the external corner of each step of side slope, perpendicular type steel shoe 1 ＇ is identical with embodiment 1, the installing hole 6 of railing 4 ＇ by as shown in Figure 4 that is positioned at above the foundation ditch is installed on the perpendicular type steel shoe at top, neighbouring steel shoe is fixedly connected with identical pole 2 ＇ of two rows structure and embodiment 1, after wherein the lower end of nethermost two row's poles combines, fixedly connected by wedge upper end bayonet socket 9 as shown in Figure 7 with wedge 3 ＇ that are fixed on the foundation ditch bottom surface (identical with embodiment 1 wedge design).
The construction technology of embodiment 1 and embodiment 2: excavation of foundation pit finish and the established prerequisite of step under, at foundation ditch bottom fixed installation wedge, subsequently, lay the perpendicular type steel shoe from bottom to top successively, then pole is connected with each perpendicular type steel shoe by flanged plate or bayonet socket (wedge place), the railing at foundation ditch top is installed at last, according to actual needs.Though above step does not meet the principle of " stage excavation, temple limit dig, support afterwards earlier and dig ", for the degree of depth not quite, soil property stepped ramp type side slope preferably, allow in engineering.Treat that underground engineering construction finishes when carrying out backfill, dismantle pole, wedge and perpendicular type steel shoe from bottom to top successively, recycle.It should be noted that general employing of every block of perpendicular type steel shoe install pole respectively in its both sides, be similar to two lateral rails of stair.
Present embodiment is applicable to the relatively poor or top preloading of soil body soil property, the comparatively serious stepped ramp type excavation slope of vibration.As shown in Figure 3, external corner at each step of side slope is laid perpendicular type steel shoe 1 "; perpendicular type steel shoe 1 is " identical with embodiment 1, " installing hole 6 by as shown in Figure 4 is installed on the perpendicular type steel shoe at top; neighbouring steel shoe is with the identical pole 2 of structure and embodiment 1 " is fixedly connected to be positioned at the railing 4 above the foundation ditch, and wherein " (identical with embodiment 1 wedge design) fixedlys connected by bayonet socket 9 on the wedge as shown in Figure 7 the lower end of nethermost pole and the wedge 3 that is fixed on the foundation ditch bottom surface.Different with embodiment 1 and 2 is described steel shoe 1 " respectively be fixed on slope soil in anchor cable 5 fixedly connected.
The construction technology of embodiment 3: when intact first step surface of excavation of foundation pit, use rig or luoyang spade to hole in the relevant position, and carry out the end anchorage of the first road anchor cable, steel shoe is installed then, and the stretch-draw of carrying out the first road anchor cable is fixed; Repeat first step operation then, second road anchor cable and the steel shoe is installed; Excavation arrives at the bottom of the foundation ditch successively, then at foundation ditch bottom fixed installation wedge; Pole is installed from bottom to top successively again, will goes up lower fulcrum bar by flanged plate or bayonet socket (wedge place) and fixedly connected with the perpendicular type steel shoe and be integral; At last, railing is installed according to actual needs.Above step meets the principle of " stage excavation, temple limit are dug, supportted afterwards earlier and dig ".Treat that underground engineering construction finishes when carrying out backfill, remove the anchor cable fixed end from bottom to top successively and dismantle pole, wedge and perpendicular type steel shoe, recycle.Identical with embodiment 1 and 2, every general employing of perpendicular type steel shoe is installed pole respectively in its both sides, is similar to the railing of stair, and anchor cable also can be arranged to many row's multiple tracks as required.
Claims (3)
1. stepped ramp type foundation pit stope support structure, it is characterized in that, external corner at each step of side slope is laid perpendicular type steel shoe (1), and neighbouring steel shoe is fixedly connected with pole (2), fixedlys connected with the wedge that is fixed on the foundation ditch bottom surface (3) in the lower end of bottom pole.
2. stepped ramp type foundation pit stope support structure according to claim 1 is characterized in that, described pole is double up and down.
3. stepped ramp type foundation pit stope support structure according to claim 1 is characterized in that, described steel shoe (1) is fixedlyed connected with the anchor cable (5) in being fixed on slope soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149974 CN203222802U (en) | 2013-03-29 | 2013-03-29 | Stepped foundation pit slope supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149974 CN203222802U (en) | 2013-03-29 | 2013-03-29 | Stepped foundation pit slope supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203222802U true CN203222802U (en) | 2013-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320149974 Expired - Fee Related CN203222802U (en) | 2013-03-29 | 2013-03-29 | Stepped foundation pit slope supporting structure |
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| Country | Link |
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| CN (1) | CN203222802U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196035A (en) * | 2014-05-17 | 2014-12-10 | 吴保全 | Pipe foundation pit predeformation support method |
| CN104532852A (en) * | 2014-12-23 | 2015-04-22 | 中国建筑西南勘察设计研究院有限公司 | Opposite-pull type prestressed pipe pile foundation pit supporting structure and mounting method thereof |
| CN105649086A (en) * | 2014-11-11 | 2016-06-08 | 五冶集团上海有限公司 | Shallow-to-deep reverse construction method for underground concrete structure |
| CN105735322A (en) * | 2016-02-04 | 2016-07-06 | 郑州安源工程技术有限公司 | Design and construction method of rigid-flexible composite anti-seepage recoverable supporting structure |
| CN108005089A (en) * | 2018-02-01 | 2018-05-08 | 华洲建设温州有限公司 | A kind of foundation pit supporting construction |
| CN108316077A (en) * | 2018-02-08 | 2018-07-24 | 中交第二公路勘察设计研究院有限公司 | One kind underlies shallow embedding cave dwelling roadbed treatment structures and method |
| CN112502167A (en) * | 2020-11-20 | 2021-03-16 | 浙江世润建创科技发展有限公司 | Slope rain-sprinkling ditch treatment structure and construction method |
| CN113756317A (en) * | 2021-09-27 | 2021-12-07 | 蓝海建设集团有限公司 | Collapsible loess foundation treatment method |
-
2013
- 2013-03-29 CN CN 201320149974 patent/CN203222802U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196035A (en) * | 2014-05-17 | 2014-12-10 | 吴保全 | Pipe foundation pit predeformation support method |
| CN104196035B (en) * | 2014-05-17 | 2016-05-18 | 吴保全 | Pipeline foundation ditch predeformation method for protecting support |
| CN105649086A (en) * | 2014-11-11 | 2016-06-08 | 五冶集团上海有限公司 | Shallow-to-deep reverse construction method for underground concrete structure |
| CN105649086B (en) * | 2014-11-11 | 2017-06-30 | 五冶集团上海有限公司 | Deep inverse formula construction method after a kind of underground concrete structure is first shallow |
| CN104532852A (en) * | 2014-12-23 | 2015-04-22 | 中国建筑西南勘察设计研究院有限公司 | Opposite-pull type prestressed pipe pile foundation pit supporting structure and mounting method thereof |
| CN105735322A (en) * | 2016-02-04 | 2016-07-06 | 郑州安源工程技术有限公司 | Design and construction method of rigid-flexible composite anti-seepage recoverable supporting structure |
| CN108005089A (en) * | 2018-02-01 | 2018-05-08 | 华洲建设温州有限公司 | A kind of foundation pit supporting construction |
| CN108316077A (en) * | 2018-02-08 | 2018-07-24 | 中交第二公路勘察设计研究院有限公司 | One kind underlies shallow embedding cave dwelling roadbed treatment structures and method |
| CN112502167A (en) * | 2020-11-20 | 2021-03-16 | 浙江世润建创科技发展有限公司 | Slope rain-sprinkling ditch treatment structure and construction method |
| CN113756317A (en) * | 2021-09-27 | 2021-12-07 | 蓝海建设集团有限公司 | Collapsible loess foundation treatment method |
| CN113756317B (en) * | 2021-09-27 | 2022-11-04 | 蓝海建设集团有限公司 | Collapsible loess foundation treatment method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131002 Termination date: 20140329 |