CN102345295B - Pit supporting system and installation method - Google Patents
Pit supporting system and installation method Download PDFInfo
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- CN102345295B CN102345295B CN201010240135.7A CN201010240135A CN102345295B CN 102345295 B CN102345295 B CN 102345295B CN 201010240135 A CN201010240135 A CN 201010240135A CN 102345295 B CN102345295 B CN 102345295B
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Abstract
The invention provides a pit supporting system and an installation method. The pit supporting system comprises a diaphragm wall which is arranged on the surface of a pit body, wherein a first steel plate is longitudinally arranged on one side of the diaphragm wall, a second steel plate is arranged on the diaphragm wall on the side opposite to the side of the first steel plate, a first support is installed on the first steel plate, a second support is installed on the second steel plate, and the first support and the second support are arranged at the same height of a pit; and the two ends of a retractable steel support are respectively arranged on the first support and the second support, and the first steel plate is abutted against the second steel plate. By arranging the supports on the diaphragm wall in the pit to lift the retractable steel support, the effects of reducing construction cost, improving engineering quality, accelerating pit construction and effectively controlling pit deformation are achieved.
Description
Technical field
The present invention relates to a kind of support system and mounting method, particularly relate to a kind of foundation pit support system and mounting method.
Background technology
People's Republic of China's industry standard " building foundation pit supporting tecnical regulations " JGJ120-99 is defined as follows pattern foundation pit supporting structure: for ensureing the safety of Underground Construction and foundation ditch surrounding enviroment, and what adopt foundation pit side-wall and surrounding enviroment props up gear, reinforcing and safeguard measure.
It is no matter the deep-foundation pit engineering of highrise building or subway; owing to being all excavate in city; usually there are the various structure such as traffic main artery, built construction or pipeline around foundation ditch, this just relates to one of excavation of foundation pit very important content, protect the safe handling of its periphery structure.And general pattern foundation pit supporting structure be temporary structure mostly, investment also easily causes waste too greatly, but supporting and protection structure is dangerous will certainly cause engineering accident again.Therefore, how safety, reasonably select suitable supporting and protection structure and be the main contents that base pit engineering will solve according to the design that the feature of base pit engineering carries out science.
In prior art, the method for the lifting of foundation pit steel support is as follows: adopt bracing members segmentation to hang in foundation ditch, segmented assembly, first the support supporting one end welding is arranged absolute altitude place and then Piecemeal erection to the other end, this kind of method difficulty of construction is large, time-consuming, installation accuracy is not high, can not be formed fast to support to apply axle power.
Summary of the invention
The object of this invention is to provide with a kind of foundation pit support system and mounting method, large in order to solve foundation pit steel support lifting construction difficulty in prior art, time-consuming, installation accuracy is not high, can not apply the problem of axle power fast.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of foundation pit support system, wherein, one telescopic bracing members, comprise: the steel pipe support of a tubulose, its one end connects a seat-box of side opening one by one, and the open side of described seat-box is positioned at described steel pipe support and described the relative side of seat-box connecting portion, one jack is placed in a described seat-box, and the top land of described jack exposes described open side, the bottom of described jack abuts with described connecting portion, and the opposite side of described steel pipe support connects a segmented head; The side of the diaphragm wall in foundation ditch is vertically arranged with one first steel plate, the described diaphragm wall of the side relative with described first steel plate is also provided with one second steel plate; One first bearing, is arranged on described first steel plate, one second bearing, is arranged on described second steel plate, and described first bearing and described second bearing are positioned at the sustained height of described foundation ditch; Described seat-box is placed on the first bearing, and top land and described first steel plate of described jack offset, and described segmented head is placed on described second bearing, and described segmented head and described second steel plate offset.
Above-mentioned foundation pit support system, wherein, described first bearing is a bracket bearing, comprise: be installed in parallel in two Cowhells plates on described first steel plate, be arranged on multiple bracket muscle side plates of described two bracket gusset sides, and level is arranged on the panel of the upside of described two Cowhells plates and described multiple Cowhells.
Above-mentioned foundation pit support system, wherein, described second bearing is a steel case bearing, comprising: at least one triangle ribbed panel is arranged on the plate face of described second steel plate, and a shelf level is arranged on described at least one triangle ribbed panel.
Above-mentioned foundation pit support system, wherein, described bearing case comprises: a junction plate be connected with described steel pipe support, one level is arranged on the base plate on described junction plate, and two are installed in parallel in side plate on described base plate, described jack is placed on described base plate, and between described biside plate, bottom and the described junction plate of described jack offset.
Above-mentioned foundation pit support system, wherein, described base plate is also provided with the very heavy inverted draw cut of an arc.
Above-mentioned foundation pit support system, wherein, the very heavy inverted draw cut of described arc is arranged between described biside plate, and the inwall of the very heavy inverted draw cut of described arc and the mating shapes of described jack, described jack is placed in the very heavy inverted draw cut of described arc.
A kind of mounting method of foundation pit support system, wherein, comprise: by the surface of diaphragm wall winding at Foundation Pit body, one first steel plate is longitudinally arranged on the side of described diaphragm wall, one second steel plate is arranged on the described diaphragm wall of the side relative with described first steel plate; One first bearing is arranged on described first steel plate, one second bearing is arranged on described second steel plate, make described first bearing and described second bearing be positioned at the sustained height of foundation ditch; One telescopic bracing members hung in foundation ditch, the two ends of telescopic bracing members are placed on described first bearing and described second bearing respectively, and the two ends of described bracing members offsets with described first steel plate and described second steel plate respectively.
The mounting method of above-mentioned foundation pit support system, wherein, the mounting method of described first bearing is: be installed in parallel on the first steel plate by two bracket gussets, multiple bracket muscle side plate is arranged on the side of described two bracket gussets, a panel-level is arranged on described bracket muscle side plate and bracket gusset.
The mounting method of above-mentioned foundation pit support system, wherein, the concrete mounting method of described second bearing is: be arranged on by least one triangle ribbed panel on the plate face of described second steel plate, a shelf level is arranged on described at least one triangle ribbed panel;
The mounting method of above-mentioned foundation pit support system, wherein, the mounting method of described bracing members is specially: an one end seat-box of side opening being one by one arranged on the steel pipe support of a tubulose, to prop up seat-box is placed on described first bearing, the open side of a seat-box is made to be positioned at described steel pipe support and described the relative side of seat-box connecting portion, one jack is placed in a described seat-box, and make the top land of described jack expose described open side, and offset with described first steel plate, the bottom of described jack is abutted with described connecting portion, the segmented head that the opposite side of described steel pipe support connects is placed on described second bearing, and described segmented head and described second steel plate are offseted.
Owing to have employed technique scheme, the present invention adopts at continuous bracing members absolute altitude place, underground, foundation ditch both sides prevention steel plate embedded part, thus reaches reduction construction cost, improves workmanship, accelerates foundation pit construction and effective effect controlling foundation pit deformation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment one of foundation pit support system of the present invention;
Fig. 2 is the structural representation of the first bearing of foundation pit support system of the present invention;
Fig. 3 is the structural representation of the second bearing of foundation pit support system of the present invention;
Fig. 4 is the structural representation of a seat-box of foundation pit support system of the present invention;
Fig. 5 is the structure sectional view of a seat-box of foundation pit support system of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Embodiment (one)
Fig. 1 is the structural representation of the embodiment one of foundation pit support system of the present invention, refer to Fig. 1, a kind of foundation pit support system, comprise a telescopic bracing members 2 and comprise a steel pipe support 21 and a seat-box 23, prop up one end that seat-box 23 is arranged on bracing members 21, prop up a side opening of seat-box 23, the open side of propping up seat-box 23 is positioned at steel pipe support 21 and a relative side of seat-box 23 connecting portion, one very heavy 22 overheads are in a seat-box 23, the top land of jack 22 exposes open side, and offset with the first steel plate 11, the bottom of jack 22 abuts with connecting portion, install in a seat-box 23 and the length that a jack 22 makes it possible to be regulated by operation jack 22 telescopic bracing members 2 is set, the opposite side of steel pipe support 21 connects a segmented head 24, one end of segmented head 24 is placed in steel pipe support 21, segmented head 24 can stretch in steel pipe support 21, the length that segmented head 24 can be regulated to stretch out according to the width of foundation ditch, foundation pit support system of the present invention is enable to adapt to more foundation ditch environment.Be arranged on the diaphragm wall 1 of Foundation Pit surface, the metope of surrounding in Foundation Pit body all covers by diaphragm wall 1, wherein, the side of diaphragm wall 1 is vertically arranged with one first steel plate 11, first steel plate 11 is arranged on diaphragm wall 1, and the plate face of the first steel plate 11 is parallel with the metope of diaphragm wall 1, the diaphragm wall 1 of the side relative with the first steel plate 11 is also provided with one second steel plate 12, the plate face of the second steel plate 12 is parallel with the metope of diaphragm wall 1, and the second steel plate 12 is placed on diaphragm wall 1, one first bearing 3 is arranged on the first steel plate 11, and one second bearing 4 is arranged on the second steel plate 12, and the first bearing 3 and second seat 4 are in the sustained height of foundation ditch, propping up seat-box 23 is placed on the first bearing 3, segmented head 24 is placed on the second bearing 4, make the specified altitude assignment be placed in foundation ditch of telescopic bracing members 2 level, the effect of the first bearing 3 and the second bearing 4 is the gravity bearing the applying of telescopic bracing members 2, and telescopic bracing members 2 and the first steel plate 11 and the second steel plate 12 offset, pressure can be applied to the first steel plate 11 and the second steel plate 12 by controlling the flexible of telescopic bracing members 2, install in seat-box 23 and a jack 22 is set makes it possible between the first steel plate 11 and steel pipe support 21, apply pressure by operating jack 22, and then make telescopic bracing members 2 to the first steel plate 11, second steel plate 12 applies pressure, and then pressure is applied to the diaphragm wall 1 being provided with the first steel plate 11 and the second steel plate 12, reach the object avoiding diaphragm wall 1 to be out of shape and can apply axle power to diaphragm wall 1 owing to only telescopic bracing members 2 need be placed on the first bearing 3 and the second bearing 4, reach easy to operate, the object of support system can be formed fast.
First bearing 3 and the second bearing 4 can be fixed on the first steel plate 11 and the second steel plate 12 by the mode of welding, adopt the mode of welding can make between bearing and steel plate fixing more firm.
First steel plate 11 and the second steel plate 12 can adopt pre-buried mode to be placed in diaphragm wall 1, namely before diaphragm wall 1 is built, the first steel plate 11 and the second steel plate 12 are placed in diaphragm wall 1, diaphragm wall 1 body of wall and the first steel plate 11 and the second steel plate 12 are realized better fixing.
Embodiment (two)
Fig. 2 is the structural representation of the first bearing of foundation pit support system of the present invention, refer to Fig. 2, on the basis of above-described embodiment, first bearing 3 of foundation pit support system of the present invention is specially a bracket bearing, comprise: be installed in parallel in two bracket gussets 31 on described first steel plate 11, be arranged on multiple bracket muscle side plates 33 of two bracket gusset 31 sides, two bracket gussets 31 are perpendicular to the plate face of the first steel plate 11, multiple bracket muscle side plate 33 is perpendicular to two bracket gussets 31, two bracket gussets 31 are fixedly mounted on the plate face of the first steel plate 11 by the mode of welding, one panel 32 level is arranged on two bracket gussets 31 and multiple bracket muscle side plate 33, the end face of the bottom surface of panel 32 and the end face of two bracket gussets 31 and multiple bracket muscle side plate 33 is fixed, two bracket gussets 31 are adopted to support with multiple bracket muscle side plate 33 counter plate 32, the acquisition Area of bearing of panel 32 bottom surface is increased, not easily deformation is there is in panel 32 when placing weight, due to adding of bracket muscle side plate 33, making that weight is placed in plate face local away from bracket gusset 31 on panel 32 also can not make panel 32 be out of shape, add application life, load-bearing scope and safety.
Embodiment (three)
Fig. 3 is the structural representation of the second bearing of foundation pit support system of the present invention, refer to Fig. 3, on the basis of above-described embodiment, second bearing 4 of foundation pit support system of the present invention is specially a steel case bearing, comprise: at least one triangle ribbed panel 42 is arranged on the plate face of the second steel plate 12, triangle ribbed panel 42 is arranged on the plate face of the second steel plate 12 by the mode of welding, triangle ribbed panel 42 can be a triangular steel plate, be fixed more firm by the mode of welding to triangle ribbed panel 42, make triangle ribbed panel 42 can bear top and apply pressure downwards, at least one triangle ribbed panel 42 is provided with a shelf 41, triangle ribbed panel 42 is installed shelf 41 to support segmented head shrouding, can segmented head 24 be placed on the shelf, the weight that the quantity of triangle ribbed panel 42 can be born more at most is larger.
Embodiment (four)
Fig. 4 is the structural representation of a seat-box of foundation pit support system of the present invention, Fig. 5 is the structure sectional view of a seat-box of foundation pit support system of the present invention, refer to Fig. 4, Fig. 5, on the basis of above-described embodiment, a seat-box 23 of foundation pit support system of the present invention, comprise a plate 28, one end steel plate 26, biside plate 25 and a jack 22, junction plate 28 is connected with steel pipe support 21, one end of steel pipe support 21 is provided with a fixed head, one plate face of junction plate 28 is fixedly mounted on a plate face of fixed head, end steel plate 26 level is arranged on junction plate 28, biside plate 25 is installed in parallel on end steel plate 26, the effect of biside plate 25 bears steel pipe support 21 to a downforce for seat-box 23 applying, jack 22 is placed on end steel plate 26, and between biside plate 25, bottom and the junction plate 28 of jack 22 offset, the piston rod of jack 22 is perpendicular to the first steel plate 11, bottom and the junction plate 28 of jack 22 offset, biside plate 25 bears bracing members 21 applied pressure when a seat-box 23 is placed on the first support 3, in a seat-box 23, arrange jack 22 make it possible to apply axle power fast by operation jack 22 pairs of diaphragm walls 1, the object reaching Fast Installation and use fast, and jack 22 can be regulated according to actual needs to apply the size of axle power, the axle power that diaphragm wall 1 is obtained is suitable, avoid the situation occurring that axle power is excessive or too small.
Jack 22 can adopt hydraulic jack, hydraulic jack have simple structure, lightweight, be easy to carry, the advantage of conveniently moving.
The upper face of end steel plate 26 is also provided with the very heavy inverted draw cut 27 of an arc, the very heavy inverted draw cut 27 of arc is arranged between biside plate 25, the radian of arc very heavy inverted draw cut 27 inwall and the mating shapes of jack 22, jack 22 is placed in the very heavy inverted draw cut 27 of arc, adding of the very heavy inverted draw cut of arc 27 makes jack 22 more stable, can set jack 22 as required and execute stressed direction and height.
The upper face of end steel plate 26 also can arrange two gripper shoes, two gripper shoes are vertically arranged on end steel plate 26, two gripper shoes are placed between biside plate 25, and two gripper shoes parallel with junction plate 28, two gripper shoes 27 are equipped with the identical depression of a radian, jack 22 is perpendicular to two gripper shoes, and jack 22 is placed in two arc-shaped recess, with arc-shaped recess gripper shoe add that jack 22 is placed in seat-box 23 is more stable, the direction applying power also more easily controls.
One end that steel pipe support 21 is fixed with junction plate 28 is provided with a fixed head, junction plate 28 can be fixed by multiple screw and fixed head, realizes junction plate 28 and is close to fixed head, junction plate 28 and fixed head are fixed by screw, can make the tightr of both laminatings, fixing is firmer.
A kind of mounting method of foundation pit support system, wherein, comprise: by the surface of diaphragm wall winding at Foundation Pit body, one first steel plate is longitudinally arranged on the side of described diaphragm wall, one second steel plate is arranged on the described diaphragm wall of the side relative with described first steel plate; One first bearing is arranged on described first steel plate, one second bearing is arranged on described second steel plate, make described first bearing and described second bearing be positioned at the sustained height of foundation ditch; One telescopic bracing members hung in foundation ditch, the two ends of telescopic bracing members are placed on described first bearing and described second bearing respectively, and the two ends of described bracing members offsets with described first steel plate and described second steel plate respectively.
The mounting method of the first bearing is: be installed in parallel on the first steel plate by two bracket gussets, multiple bracket muscle side plate is arranged on the side of described two bracket gussets, is arranged on described bracket muscle side plate and bracket gusset by a panel-level.
The concrete mounting method of the second bearing is: be arranged on by least one triangle ribbed panel on the plate face of described second steel plate, a shelf level is arranged on described at least one triangle ribbed panel;
The mounting method of bracing members is specially: an one end seat-box of side opening being one by one arranged on the steel pipe support of a tubulose, to prop up seat-box is placed on described first bearing, the open side of a seat-box is made to be positioned at described steel pipe support and described the relative side of seat-box connecting portion, one jack is placed in a described seat-box, and make the top land of described jack expose described open side, and offset with described first steel plate, the bottom of described jack is abutted with described connecting portion, the segmented head that the opposite side of described steel pipe support connects is placed on described second bearing, and described segmented head and described second steel plate are offseted.
The concrete mounting method propping up seat-box is: be connected with bracing members by a plate, one end steel plate level is arranged on junction plate, parallel installation biside plate on end steel plate, end steel plate arranges a jack, and make this jack between biside plate, the bottom of jack and described junction plate are offseted.
In sum, it is large that a kind of foundation pit support system of the present invention and mounting method solve difficulty of construction in prior art, time-consuming, installation accuracy is not high, can not form the problem supporting and apply axle power fast, by the diaphragm wall in foundation ditch arranges bearing, telescopic bracing members is hung in, thus reach reduction construction cost, improve workmanship, accelerate foundation pit construction and effective effect controlling foundation pit deformation.
Be described in detail specific embodiments of the invention above, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and substituting also all among category of the present invention.Therefore, equalization conversion done without departing from the spirit and scope of the invention and amendment, all should contain within the scope of the invention.
Claims (8)
1. a foundation pit support system, it is characterized in that, one telescopic bracing members, comprise: the steel pipe support of a tubulose, its one end connects a seat-box of side opening one by one, and the open side of described seat-box is positioned at described steel pipe support and described the relative side of seat-box connecting portion, one jack is placed in a described seat-box, and the top land of described jack exposes described open side, the bottom of described jack abuts with described connecting portion, and the opposite side of described steel pipe support connects a segmented head; The side of the diaphragm wall in foundation ditch is vertically arranged with one first steel plate, the described diaphragm wall of the side relative with described first steel plate is also provided with one second steel plate; One first bearing, is arranged on described first steel plate, one second bearing, is arranged on described second steel plate, and described first bearing and described second bearing are positioned at the sustained height of described foundation ditch; Described seat-box is placed on the first bearing, and top land and described first steel plate of described jack offset, and described segmented head is placed on described second bearing, and described segmented head and described second steel plate offset;
Described bearing case comprises: a junction plate be connected with described steel pipe support, one level is arranged on the base plate on described junction plate, and two are installed in parallel in side plate on described base plate, described jack is placed on described base plate, and between described biside plate, bottom and the described junction plate of described jack offset; One end that steel pipe support and junction plate are fixed is provided with a fixed head, junction plate can be fixed by multiple screw and fixed head, realizes junction plate and fixed head is close to, and junction plate and fixed head is fixed by screw, can make the tightr of both laminatings, fixing is firmer.
2. foundation pit support system as claimed in claim 1, it is characterized in that, described first bearing is a bracket bearing, comprise: be installed in parallel in two bracket gussets on described first steel plate, be arranged on multiple bracket muscle side plates of described two bracket gusset sides, and level is arranged on the panel of the upside of described two bracket gussets and described multiple bracket muscle side plate.
3. foundation pit support system as claimed in claim 1, it is characterized in that, described second bearing is a steel case bearing, comprising: at least one triangle ribbed panel is arranged on the plate face of described second steel plate, and a shelf level is arranged on described at least one triangle ribbed panel.
4. foundation pit support system as claimed in claim 1, is characterized in that, described base plate is also provided with the very heavy inverted draw cut of an arc.
5. foundation pit support system as claimed in claim 4, it is characterized in that, the very heavy inverted draw cut of described arc is arranged between described biside plate, and the inwall of the very heavy inverted draw cut of described arc and the mating shapes of described jack, described jack is placed in the very heavy inverted draw cut of described arc.
6. the mounting method of a foundation pit support system, it is characterized in that, comprise: by the surface of diaphragm wall winding at Foundation Pit body, one first steel plate is longitudinally arranged on the side of described diaphragm wall, one second steel plate is arranged on the described diaphragm wall of the side relative with described first steel plate; One first bearing is arranged on described first steel plate, one second bearing is arranged on described second steel plate, make described first bearing and described second bearing be positioned at the sustained height of foundation ditch; One telescopic bracing members is hung in foundation ditch, the two ends of telescopic bracing members are placed on described first bearing and described second bearing respectively, and the two ends of described bracing members offset with described first steel plate and described second steel plate respectively;
The mounting method of described bracing members is specially: an one end seat-box of side opening being one by one arranged on the steel pipe support of a tubulose, to prop up seat-box is placed on described first bearing, the open side of a seat-box is made to be positioned at described steel pipe support and described the relative side of seat-box connecting portion, one jack is placed in a described seat-box, and make the top land of described jack expose described open side, and offset with described first steel plate, the bottom of described jack is abutted with described connecting portion, the segmented head that the opposite side of described steel pipe support connects is placed on described second bearing, and described segmented head and described second steel plate are offseted.
7. the mounting method of foundation pit support system as claimed in claim 6, it is characterized in that, the mounting method of described first bearing is: be installed in parallel on the first steel plate by two bracket gussets, multiple bracket muscle side plate is arranged on the side of described two bracket gussets, a panel-level is arranged on described bracket muscle side plate and bracket gusset.
8. the mounting method of foundation pit support system as claimed in claim 6, it is characterized in that, the concrete mounting method of described second bearing is: be arranged on by least one triangle ribbed panel on the plate face of described second steel plate, a shelf level is arranged on described at least one triangle ribbed panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010240135.7A CN102345295B (en) | 2010-07-29 | 2010-07-29 | Pit supporting system and installation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010240135.7A CN102345295B (en) | 2010-07-29 | 2010-07-29 | Pit supporting system and installation method |
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| CN102345295A CN102345295A (en) | 2012-02-08 |
| CN102345295B true CN102345295B (en) | 2015-05-20 |
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| CN201010240135.7A Active CN102345295B (en) | 2010-07-29 | 2010-07-29 | Pit supporting system and installation method |
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| CN103184742A (en) * | 2011-12-27 | 2013-07-03 | 上海市第七建筑有限公司 | Support structure used for reinforcing lift foundation basement and support method thereof |
| CN102979101B (en) * | 2012-12-12 | 2015-08-19 | 上海强劲地基工程股份有限公司 | A kind of pattern foundation pit supporting structure reinforced concrete inner support with prestressing force loader |
| CN103603361A (en) * | 2013-12-06 | 2014-02-26 | 黄河水利职业技术学院 | Compressible device of deep foundation pit horizontal inner support |
| CN104278682B (en) * | 2014-10-29 | 2016-05-11 | 浙江博雷重型机床制造有限公司 | A kind of bearing diagonal support of foundation ditch backplate |
| CN104294828B (en) * | 2014-10-29 | 2016-01-27 | 浙江博雷重型机床制造有限公司 | A kind of foundation pit supporting construction |
| CN104480946B (en) * | 2014-11-15 | 2016-08-24 | 北京工业大学 | A kind of active device of double anchoring parts for base pit engineering inner support and apply method |
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| CN105951847B (en) * | 2016-06-29 | 2019-03-01 | 广州市设计院 | A kind of easy mounted-dismounted type foundation pit supporting construction and construction method |
| CN106917504A (en) * | 2017-03-07 | 2017-07-04 | 中铁大桥局集团第六工程有限公司 | A kind of stull steel-tube construction and its construction method with piecing devices |
| CN107761714A (en) * | 2017-11-24 | 2018-03-06 | 天津城建大学 | A kind of support meanss and its construction technology suitable for diaphram wall |
| CN107964959A (en) * | 2017-12-05 | 2018-04-27 | 广州鑫桥建筑工程有限公司 | A kind of prefabricated assembled concrete support system |
| CN110409457A (en) * | 2019-06-26 | 2019-11-05 | 贵州建工集团第一建筑工程有限责任公司 | Deep foundation pit supporting structure and its construction method under the conditions of a kind of karst area |
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| CN102345295A (en) | 2012-02-08 |
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