CN1307348C - Construction method for underground structure through half reverse course of action of inverting connection - Google Patents

Construction method for underground structure through half reverse course of action of inverting connection Download PDF

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Publication number
CN1307348C
CN1307348C CNB2004100169548A CN200410016954A CN1307348C CN 1307348 C CN1307348 C CN 1307348C CN B2004100169548 A CNB2004100169548 A CN B2004100169548A CN 200410016954 A CN200410016954 A CN 200410016954A CN 1307348 C CN1307348 C CN 1307348C
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China
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template
underground
semi
inverse
construction
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CNB2004100169548A
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Chinese (zh)
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CN1563612A (en
Inventor
秦夏强
王英俊
白艳霞
杨勇
李炳伟
谢非
祃丽婷
魏宏超
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中国第二十冶金建设公司
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Abstract

The present invention relates to a reverse connection construction method for an underground structure semi-reverse operation method, which comprises the following steps after a guard fence (1) is established and earth is excavated that a temporary sand slot joint (2) which is composed of a tenon slot (3), a cushion layer (4) and a solid filling layer (5) is manufactured; a template (10) is arranged on the temporary sand slot joint (2); the template is fixed by a scaffolding made of vertical steel reinforcement (6) and transverse steel reinforcement (11); a counter-pull hole is arranged on the template; one end of the counter-pull hole is fixed on the guide fence, and the other end is fixed on the scaffolding by a counter-pull screw bolt (7); the scaffolding is supported by supporting rods (9); a pouring opening of a false cattle leg is manufactured on the upper end of the template; concrete is poured; the maintenance for the concrete is carried out after the concrete is poured; the template is removed after maintenance, and the steps are repeated until the construction is finished. The enforcement of the present invention has the advantages of project cost saving and convenient construction and wide economical and social benefits, and ensures the stability of the structure and the safety of the surrounding environment.

Description

The underground structure semi-inverse method oppositely connects job practices

Technical field

The underground structure semi-inverse method that the present invention relates to the civil construction industry oppositely connects job practices.

Background technology

Along with the continuous development of urban construction and other infrastructure, the development and utilization of the underground space more and more is subject to people's attention, and the underground construction engineering under the complex environment is also more and more thus, and the difficulty of design, construction is also increasing.At present, the construction of underground construction is adopted mostly along the practice or two kinds of methods of contrary sequence method.Owing to will be subjected to many-sided restriction along practice construction, mainly be meant the restriction of ambient conditions, if when to be subgrade or foundation construction requirement dark in the construction site, along the less employing of the practice, because use along the practice with this understanding and can produce higher construction cost, the expense of going along with sb. to guard him is in advance improved; Simultaneously, excavating in the process of the earthwork downwards along practice construction, owing to have scaffold to support retaining wall after the previous excavation of earthwork, these scaffolds that built bring unnecessary trouble can for excacation once more, become the obstacle that excavates once more.Underground construction for underground construction under the complex environment and special construction requirement adopts contrary sequence method more suitable, contrary sequence method be exactly around to go along with sb. to guard him be after diaphragm wall is carried out, excavate one section earthwork downwards, adopting the bracket method that this section is carried out concrete structure then builds, carry out downwards successively again, until the bottom.But, there is following problem in used now contrary sequence method: 1, owing to can cause constuction joint the disadvantage that seeps water and leak to occur since the differential settlement of second section as placed concrete of building under the deadweight effect, at present, there is no both at home and abroad the concrete measure that the reverse construction seam is handled in the design, can only adopt and build the back processing of seeping water and leak of steel seal plate or rubber fastening band is set at the constuction joint place; 2, the constuction joint reinforcing bar is handled comparatively difficulty, and it is higher to carry out processing cost; 3, need to cut structural concrete more in large area after, just can carry out building once more.

Summary of the invention

The present invention overcome existing along the practice exist to the restriction of construction works ambient conditions and go along with sb. to guard him the higher defective of expense in advance, also overcome simultaneously constuction joint place that existing contrary sequence method exists and produced infiltration and leak and large tracts of land cuts the defective of structural concrete, provide a kind of underground structure semi-inverse method oppositely to connect job practices.This underground structure semi-inverse method oppositely connects job practices; do the measure that interim sand launder joint combines with the bracket method by the segmentation of adopting tenon formula structure is contrary; cooperation is with sand protection reinforcing bar technology; not only save construction investment, accelerating construction progress, convenient construction, also guaranteed the safety of foundation ditch stability of structure and surrounding environment.

The present invention is achieved in that a kind of underground structure semi-inverse method oppositely connects job practices, comprises foundation that go along with sb. to guard him early stage and the excavation of earthwork of carrying out subsequently, after excavation of earthwork, operates according to the following steps in the earthwork at need concreting structure place:

Step 1, make interim sand launder joint, interim sand launder joint is by tongue-and-groove, bed course and tamp layer and form, and bottom is for tamping layer, and the middle level is a bed course, and tongue-and-groove is positioned at the upper strata;

Step 2, on interim sand launder joint, template is being set, vertical reinforcement inserts in the bed course in the template outside, and combine with transverse reinforcement and to make scaffold template is fixed, the relevant position is offered pulling eye on the template, pull bar one end is fixed on goes along with sb. to guard him, the other end passes pulling eye is fixed on the scaffold through split bolt on the template;

Step 3, live scaffold with they sup-port;

Step 4, make the mouth of building of bracket in template upper end;

Step 5, concreting;

Maintenance behind step 6, the concreting;

Stripping and repeat above step after step 7, the maintenance until construction bottom.

Above-mentioned a kind of underground structure semi-inverse method oppositely connects job practices, and the layer that tamps in the interim sand launder joint adopts a yellow ground to tamp and tamps; Bed course adopts concrete or mortar; Tongue-and-groove is wooden.

Above-mentioned a kind of underground structure semi-inverse method oppositely connects job practices, stays between template and establishes constuction joint.

Above-mentioned a kind of underground structure semi-inverse method oppositely connects job practices, and support bar adopts the mode support scaffolding of diagonal brace.

Above-mentioned a kind of underground structure semi-inverse method oppositely connects job practices, and placement layer by layer is adopted in concreting.

Above-mentioned a kind of underground structure semi-inverse method oppositely connects job practices, and bracket adopts beam and slab structure.

The applied operating principle of the present invention is: utilize interim sand launder to make bed die, interim sand launder is made up of three parts, lower floor is that yellow ground tamps layer, the middle level is concrete or mortar bed, the upper strata is wooden tongue-and-groove, utilizes the laxity and the easily compacting property of sand, has made things convenient for the reverse stretching, extension of reinforcing bar in the work progress, solve the differential settlement of structure reinforcing bars in the work progress, also utilized sand that structure reinforcing bars has been played protective effect simultaneously; Adopt wooden tongue-and-groove to combine with the bracket method, played dual good waterproof effect, need not at the constuction joint place steel seal plate or rubber fastening band to be set again, also need large tracts of land not cut structural concrete before building once more, the seepy question of constuction joint has obtained effective solution.Engineering cost has not only been saved in enforcement of the present invention, convenient construction, and can guarantee the safety of deep foundation ditch stability of structure and surrounding environment to have economic benefit and social benefit widely.

Description of drawings

Fig. 1 oppositely connects the job practices structural representation for a kind of underground structure semi-inverse method, and Fig. 2 oppositely connects the tongue-and-groove of job practices and the schematic diagram of bracket for a kind of underground structure semi-inverse method.

Wherein, 1 for going along with sb. to guard him, and 2 is interim sand launder joint, and 3 is tongue-and-groove, and 4 is bed course, and 5 for tamping layer, and 6 is vertical reinforcement, and 7 is split bolt, and 8 is to pull bar, and 9 is support bar, and 10 is template, and 11 is transverse reinforcement.

The specific embodiment

The specific embodiment of the present invention is provided by accompanying drawing.

Referring to illustrated in figures 1 and 2, a kind of underground structure semi-inverse method oppositely connects job practices, comprises the excavation of earthwork that go along with sb. to guard him 1 foundation and carry out subsequently early stage, after excavation of earthwork, operates according to the following steps in the earthwork at need concreting structure place:

Step 1, make interim sand launder joint 2, interim sand launder joint 2 is by tongue-and-groove 3, bed course 4 and tamp layer 5 and forms, and bottom is for tamping layers 5, and the middle level is a bed course 4, and tongue-and-groove 3 is positioned at the upper strata;

Step 2, on interim sand launder joint 2, template 10 is being set, vertical reinforcement 6 inserts in the bed course 4 in template 10 outsides, and combine with transverse reinforcement 11 that to make scaffold fixing with template 10, the relevant position is offered pulling eye on the template 10, pull bar 8 one ends are fixed on go along with sb. to guard him on 1, the other end passes pulling eye is fixed on the scaffold through split bolt 7 on the template 10;

Step 3, support scaffold with support bar 9;

Step 4, make the mouth of building of bracket in template 10 upper ends;

Step 5, concreting;

Maintenance behind step 6, the concreting;

Stripping 10 and repeat above step after step 7, the maintenance until construction bottom.

The layer 5 that tamps in the interim sand launder joint 2 adopts yellow ground to tamp and tamps; Bed course 4 adopts concrete or mortar; Tongue-and-groove 3 is wooden.10 of templates are stayed and are established constuction joint.Support bar 9 adopts the mode support scaffolding of diagonal brace.Placement layer by layer is adopted in concreting.Bracket adopts beam and slab structure.

Embodiment 1: soft foundation is dark-and the circular underground structure of 32.75m, diameter 18.57m, adopt dark-44.55m diaphragm wall to go along with sb. to guard him, the wide chemise structure of 0.6m is divided five sections semi-inverse methods constructions, and the structure construction seam adopts the segmentation semi-inverse method oppositely to connect job practices.Segmentation half is against making the connected mode that sand launder joint vertical reinforcement is chosen spot welding and colligation, the contrary sand launder joint tenon formula structure (degree of depth 1.40m that does of segmentation, width 1.5m, wooden 80mm*100mm tongue-and-groove, the medium coarse sand compaction in layers), the contrary soil excavation of doing of 5-8m segmentation, 300-500mm layering back-up sand and compacting,  20 vertical joint bars, build the 80-100mm mortar bed, wooden tongue-and-groove location, horizontal reinforcement colligation construction, template construction stays establishes 600*400mm door hole, utilize the 1200mm*300mm waist collar tie beam of beam and slab structure to play the bracket effect, concrete 500-600mm placement layer by layer.Implementation result: harmful crack does not appear in semi-inverse method structure construction seam, does not find seepage, and there is wet stain phenomenon the part, and effect is better.

Embodiment 2: soft foundation is dark-and the circular underground structure of 29.5m, diameter 14.5m, adopt dark-41.5m diaphragm wall to go along with sb. to guard him, the wide chemise structure of 0.6m is divided three sections semi-inverse methods constructions, and the structure construction seam adopts the contrary sand launder joint construction method of doing of segmentation.Segmentation is against making the connected mode that sand launder joint vertical reinforcement is chosen spot welding and colligation, the contrary sand launder joint tenon formula structure (degree of depth 1.40m, width 1.5m, wooden 80mm*100mm tongue-and-groove, medium coarse sand compaction in layers) of doing of segmentation, the contrary soil excavation of doing of 5-10m segmentation, 300-500mm layering back-up sand and compacting,  20 vertical joint bars, build the 80-100mm concrete cushion, wooden tongue-and-groove location, template construction stays establishes 600*400mm door hole, utilize the 1100mm*300mm waist collar tie beam of beam and slab structure to play the bracket effect, concrete 500-600mm placement layer by layer.Implementation result: harmful crack does not appear in the half contrary structure construction seam of doing, and does not find seepage, does not have wet stain phenomenon, and is respond well.

Embodiment 3: soft foundation is dark-and the circular underground structure of 33.0m, diameter 28.1m, adopt dark-53.0m diaphragm wall to go along with sb. to guard him, the wide chemise structure of 0.8m is divided five sections semi-inverse methods constructions, and the structure construction seam adopts the contrary sand launder joint construction method of doing of segmentation.Segmentation is against making the connected mode that sand launder joint vertical reinforcement is chosen spot welding and colligation, the contrary sand launder joint tenon formula structure (degree of depth 1.60m, width 0.8-1.6m, wooden 100mm*100mm tongue-and-groove, medium coarse sand compaction in layers) of doing of segmentation, the contrary soil excavation of doing of 5-8m segmentation, 300-500mm layering back-up sand and compacting,  25 vertical joint bars, build 80-100mm concrete or 100mm sand cushion, wooden tongue-and-groove location, template construction stays establishes 600*400mm door hole, the 400mm*700mm bracket is set, concrete 500-600mm placement layer by layer.Implementation result: harmful crack does not appear in the half contrary structure construction seam of doing, and does not find seepage, does not have wet stain phenomenon, and is respond well.

Claims (6)

1, a kind of underground structure semi-inverse method oppositely connects job practices, comprises going along with sb. to guard him the foundation of (1) early stage and carrying out excavation of earthwork subsequently, it is characterized in that after excavation of earthwork, operates according to the following steps in the earthwork at need concreting structure place:
Step 1, make interim sand launder joint (2), interim sand launder joint (2) is by tongue-and-groove (3), bed course (4) and tamp layer (5) and form, and bottom is for tamping layer (5), and the middle level is bed course (4), and tongue-and-groove (3) is positioned at the upper strata;
Step 2, on interim sand launder joint (2), template (10) is being set, vertical reinforcement (6) inserts in the bed course (4) in template (10) outside, and combine with transverse reinforcement (11) that to make scaffold fixing with template (10), template (10) goes up the relevant position and offers pulling eye, pull bar (8) one ends are fixed on go along with sb. to guard him on (1), the other end passes pulling eye is fixed on the scaffold through split bolt (7) on the template (10);
Step 3, support scaffold with support bar (9);
Step 4, make the mouth of building of bracket in template (10) upper end;
Step 5, concreting;
Maintenance behind step 6, the concreting;
Stripping after step 7, the maintenance (10) also repeats above step until the construction bottom.
2, a kind of underground structure semi-inverse method according to claim 1 oppositely connects job practices, it is characterized in that the layer (5) that tamps in the interim sand launder joint (2) adopts a yellow ground to tamp and tamps; Bed course (4) adopts concrete or mortar; Tongue-and-groove (3) is wooden.
3, a kind of underground structure semi-inverse method according to claim 1 and 2 oppositely connects job practices, it is characterized in that staying between template (10) establishing constuction joint.
4, a kind of underground structure semi-inverse method according to claim 1 and 2 oppositely connects job practices, it is characterized in that support bar (9) adopts the mode support scaffolding of diagonal brace.
5, a kind of underground structure semi-inverse method according to claim 1 and 2 oppositely connects job practices, it is characterized in that concreting employing placement layer by layer.
6, a kind of underground structure semi-inverse method according to claim 1 and 2 oppositely connects job practices, it is characterized in that bracket adopts beam and slab structure.
CNB2004100169548A 2004-03-15 2004-03-15 Construction method for underground structure through half reverse course of action of inverting connection CN1307348C (en)

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CN102191779B (en) * 2010-03-05 2012-09-05 中国京冶工程技术有限公司厦门分公司 Topdown construction method of basement exterior wall
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CN102561402B (en) * 2010-12-22 2014-06-25 中国二十冶集团有限公司 Treatment method for construction joint between top plate and wall of individual underground civil air defense project constructed by covered top-down excavation method
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CN102704507B (en) * 2012-05-28 2015-04-29 中国建筑第八工程局有限公司 Construction method of cover-and-cut reverse construction concrete walls and columns with vertical structures
CN102776895A (en) * 2012-08-06 2012-11-14 中国建筑第六工程局有限公司 Non-connection reinforcing steel bar construction method
CN103572963B (en) * 2012-08-08 2016-06-01 中冶天工上海十三冶建设有限公司 Secondary structure concrete casting building method
CN104314069B (en) * 2014-10-15 2016-03-09 中国建筑第八工程局有限公司 Side wall reserved steel bar positioning construction method in reverse construction
CN104975616A (en) * 2015-06-30 2015-10-14 中国二十冶集团有限公司 Double-water-stop structure of rotational flow pool outer cylinder constructed through reverse building method and construction method of double-water-stop structure
CN105442846B (en) * 2015-11-05 2018-01-05 芜湖赛特施工设备有限公司 A kind of concrete vacation corbels support device
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CN106545029A (en) * 2016-01-03 2017-03-29 江西中恒地下空间科技有限公司 A kind of underground space safely and fast construction method
CN106884431B (en) * 2017-03-14 2018-06-19 黄河科技学院 A kind of building pit foundation construction safety supporting construction
CN107401207B (en) * 2017-09-11 2019-05-31 垠星建设有限公司 The construction method of drainage pipeline
CN108999194A (en) * 2018-08-20 2018-12-14 中铁十二局集团有限公司 A kind of constructing structure and construction method of Deep Foundation Pit of Metro Stations Partial Inverse work
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Address after: 201900 Shanghai city Baoshan District Pangu Road No. 777

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Address before: 201900 Shanghai city Baoshan District Pangu Road No. 777

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Owner name: CHINA MCC20 GROUP CORP., LTD.

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