CN104631432B - Flexible supporting system for prestress anchor supporting plate of sheet-pile retaining wall and construction method thereof - Google Patents
Flexible supporting system for prestress anchor supporting plate of sheet-pile retaining wall and construction method thereof Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 239000002689 soil Substances 0.000 claims abstract description 22
- 238000005260 corrosion Methods 0.000 claims abstract description 11
- 239000011083 cement mortar Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000004873 anchoring Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 39
- 239000010959 steel Substances 0.000 claims description 39
- 239000000945 filler Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 19
- 238000003466 welding Methods 0.000 claims description 14
- 238000005056 compaction Methods 0.000 claims description 10
- 239000004567 concrete Substances 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000009415 formwork Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 210000000481 breast Anatomy 0.000 abstract 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Abstract
Description
技术领域technical field
本发明专利涉及一种新的岩土工程领域针对填方工程的柔性支护体系。The patent of the invention relates to a new flexible support system for filling engineering in the field of geotechnical engineering.
背景技术Background technique
我国西部地区山地沟壑纵横，湿陷性黄土分布广泛，为求得发展空间，纷纷进行推山造地、兴建机场等工程项目，且基坑开挖和公路、铁路边坡出现的塌方也需要在原位进行支护锚固。由此产生了众多的湿陷性黄土填方工程和高填方边坡支护工程。The mountains and ravines in western my country are criss-crossed, and collapsible loess is widely distributed. In order to obtain development space, engineering projects such as pushing mountains and land and building airports have been carried out. In-situ support and anchorage. As a result, numerous collapsible loess filling projects and high fill slope support projects have been produced.
一般的填方边坡支护方法是锚定板，依靠填土与锚定板接触面上的侧向承载力以维持结构的平衡，破坏时产生的破坏面是折线形，采用的整体稳定性分析方法是Kranz法。这种技术的主要缺点在于：（1）一旦破坏，在边坡顶面会出现明显的裂缝，外部环境（降雨、冻融循环等）会加速支护结构体系的破坏。（2）锚定板传递抗拔力的钢拉杆在湿陷性黄土产生湿陷、高填方工程产生较大工后沉降过程中易折断。（3）施工过程中对锚定板的安放要求较高。无法使用大型机械进行压实影响了施工的效率。The general support method for fill slope is the anchor plate, which relies on the lateral bearing capacity on the contact surface between the fill and the anchor plate to maintain the balance of the structure. The analysis method is the Kranz method. The main disadvantages of this technology are: (1) Once damaged, obvious cracks will appear on the top of the slope, and the external environment (rainfall, freeze-thaw cycle, etc.) will accelerate the destruction of the supporting structure system. (2) The steel tie rods that transmit the pull-out force of the anchor plate are easily broken during the process of collapsible loess and large post-construction settlement in high fill engineering. (3) During the construction process, the requirements for the placement of anchor plates are relatively high. The inability to use large machinery for compaction affects the efficiency of construction.
发明内容Contents of the invention
本发明的目的是提供一种桩板墙预应力锚托板柔性支护体系及其施工方法。The object of the present invention is to provide a flexible support system of pile-slab wall prestressed anchor supporting plate and its construction method.
本发明是桩板墙预应力锚托板柔性支护体系及其施工方法该支护体系，桩板墙预应力锚托板柔性支护体系，由支护桩1、冠梁2、挡土板3、腰梁4、托板11、拉杆6、锚头24组成，支护桩1在地面以下采用挖孔成桩，桩端坐落在可靠持力层；冠梁2连接各支护桩1的顶部；在腰梁4处位置设置预留拉杆孔5；在挡土板3的中间位置预留泄水孔27；支护桩1地面以上部分、冠梁2、挡土板3、腰梁4所配钢筋相互连接，现浇为一个整体，该整体通过拉杆6与托板11相连；锚头24由封锚混凝土13、钢垫板12和锚具10组成；若拉杆6为锚索18，则一端通过锚头24与腰梁4连接，另一端也通过锚头24与托板11相连；若拉杆6为螺纹钢，则拉杆6分为拉杆前段15和拉杆后段16，拉杆前段15通过锚头24与腰梁4相连，拉杆后段16采用双面满焊17工艺，通过角钢21与托板所配钢筋20连接，拉杆前段15和拉杆后段16采用双面满焊17工艺连接；拉杆6表面涂抹防腐材料7，外面套装PVC套管8，并用水泥砂浆9包裹。The present invention relates to a flexible support system for a prestressed anchor supporting plate of a pile-slab wall and a construction method thereof. 3. Waist beam 4, support plate 11, pull rod 6, and anchor head 24. The support pile 1 is formed by digging holes below the ground, and the pile end is located on a reliable bearing layer; the crown beam 2 is connected to each support pile 1. Top; reserve tie rod holes 5 at 4 positions of the waist beam; reserve drain holes 27 in the middle of the retaining plate 3; support pile 1 above ground, crown beam 2, earth retaining plate 3, waist beam 4 The steel bars are connected to each other and cast in place as a whole, which is connected to the supporting plate 11 through the tie rod 6; the anchor head 24 is composed of the anchor concrete 13, the steel backing plate 12 and the anchor 10; if the tie rod 6 is the anchor cable 18, Then one end is connected with the waist beam 4 through the anchor head 24, and the other end is also connected with the supporting plate 11 through the anchor head 24; The anchor head 24 is connected to the waist beam 4, the rear section 16 of the tie rod adopts the double-sided full welding 17 process, and is connected with the steel bar 20 equipped with the supporting plate through the angle steel 21, and the front section 15 of the tie rod and the rear section 16 of the tie rod are connected by the double-sided full welding 17 process; The anti-corrosion material 7 is coated on the surface of the pull rod 6, and the PVC casing 8 is set on the outside, and is wrapped with cement mortar 9.
桩板墙预应力锚托板柔性支护体系的施工方法，其步骤为：The construction method of the flexible support system of the prestressed anchor supporting plate of the pile-slab wall, the steps are:
（1）预制托板11；(1) Prefabricated pallet 11;
按照计算结果配置托板11所需钢筋20，若拉杆6为锚索18，则在托板内利用PVC套管8预留孔道，支模现浇成型达到预设强度后，将锚索穿过预留孔洞后利用锚具10与托板11相连；Configure the steel bar 20 required for the supporting plate 11 according to the calculation results. If the tie rod 6 is the anchor cable 18, use the PVC sleeve 8 to reserve a hole in the supporting plate. After the hole is reserved, the anchor 10 is used to connect with the supporting plate 11;
拉杆6若为螺纹钢，则拉杆6分为拉杆前段15和拉杆后段16，其中拉杆后段16一部分与托板11所配钢筋20利用角钢21相连，工艺为双面满焊17，支模后现浇成型。托板11的表面可做成波纹形26等有利于增加表面面积的形状；If the tie rod 6 is threaded steel, the tie rod 6 is divided into the front part 15 of the tie rod and the rear part 16 of the tie rod, wherein a part of the rear part 16 of the tie rod is connected with the steel bar 20 equipped with the supporting plate 11 by using an angle steel 21. The process is double-sided full welding 17, and the mold Post-cast molding. The surface of supporting plate 11 can be made into corrugated shape 26 etc. and is conducive to the shape that increases surface area;
（2）施工支护桩1、压顶冠梁2、挡土板3和腰梁4；(2) Construction support pile 1, crown beam 2, retaining plate 3 and waist beam 4;
支护桩1在地面以下部分进行挖孔成桩，桩端应坐落在可靠的持力层；The support pile 1 is dug into the pile below the ground, and the pile end should be located on a reliable bearing layer;
支护桩1地面以上部分所配钢筋与冠梁2、档土板3和腰梁4所配钢筋相互连接，并支模现浇成一个整体，钢筋的锚固长度应符合相关规范的要求；The steel bars above the ground of the support pile 1 are connected with the steel bars of the crown beam 2, the soil retaining plate 3 and the waist beam 4, and the formwork is cast in place to form a whole. The anchorage length of the steel bars should meet the requirements of relevant specifications;
在挡土板3上用PVC套管8预留泄水孔27，在腰梁4上采用PVC套管8预留拉杆孔5；Use PVC sleeve pipe 8 to reserve drain hole 27 on soil retaining plate 3, adopt PVC sleeve pipe 8 to reserve pull rod hole 5 on waist beam 4;
（3）待支护桩1、挡土板3、腰梁4的混凝土强度达到85%以上后，方能在墙后进行填料14压实处理；(3) After the concrete strength of support pile 1, earth retaining board 3 and waist beam 4 reaches more than 85%, the filler 14 can be compacted behind the wall;
填料14压实应从自然地面标高开始，填料14的压实系数根据边坡稳定性计算中土体参数的要求决定；The compaction of filler 14 should start from the natural ground elevation, and the compaction coefficient of filler 14 is determined according to the requirements of soil parameters in slope stability calculation;
（4）安放托板11；(4) place the pallet 11;
待填料14压实处理达到第一排托板11设计标高后，在已压实处理的土层中开设100mmx100mm的凹槽25，将预制的托板11水平放置，拉杆后段16放置于开设好的凹槽25中；After the filler 14 has been compacted to reach the design elevation of the first row of supporting plates 11, a groove 25 of 100 mm x 100 mm is opened in the compacted soil layer, the prefabricated supporting plates 11 are placed horizontally, and the rear section 16 of the pull rod is placed on the opened in the groove 25;
若拉杆为锚索18，则与托板11连接的锚头24也应放置于相应的凹槽中；If the pull rod is the anchor cable 18, the anchor head 24 connected with the supporting plate 11 should also be placed in the corresponding groove;
（5）连接拉杆的前段15和后段16。拉杆的前段15一端伸入预留的拉杆孔5，另一端与拉杆后段16相连，连接工艺为双面满焊17；(5) Connect the front section 15 and the rear section 16 of the tie rod. One end of the front section 15 of the tie rod extends into the reserved tie rod hole 5, and the other end is connected with the rear section 16 of the tie rod, and the connection process is double-sided full welding 17;
（6）对拉杆6进行防腐处理。在整个拉杆表面涂一层防腐材料7，套装到PVC套管8中，然后在凹槽25中填塞水泥砂浆9；(6) Perform anti-corrosion treatment on the tie rod 6 . Apply a layer of anti-corrosion material 7 on the surface of the entire pull rod, set it into the PVC casing 8, and then fill the cement mortar 9 in the groove 25;
（7）待水泥砂浆9的强度达到85%以上后，继续进行填料14的压实处理。直至达到第二排托板11的安放位置；(7) After the strength of the cement mortar 9 reaches more than 85%, continue the compaction treatment of the filler 14 . until reaching the placement position of the second row of pallets 11;
（8）重复步骤（2）、步骤（3）、步骤（4）、步骤（5）、步骤（6）、步骤（7），直至填至支护桩1桩顶标高；(8) Repeat step (2), step (3), step (4), step (5), step (6), and step (7) until filling up to the top elevation of support pile 1;
（9）对锚托板进行预应力张拉，形成预应力锚托板23，用锚具10将预应力锚托板23与腰梁4紧密连接，然后施工用于保护的封锚混凝土13；(9) Perform prestressed tension on the anchor plate to form a prestressed anchor plate 23, use anchors 10 to tightly connect the prestressed anchor plate 23 to the waist beam 4, and then construct the anchor concrete 13 for protection;
（10）按照此步骤施工下一个工作面的预应力锚托板23、挡土板3、腰梁4和支护桩1，并完成各层预应力锚托板23的张拉与锚固。(10) Follow this step to construct the prestressed anchor plate 23, soil retaining plate 3, waist beam 4 and support pile 1 of the next working face, and complete the tensioning and anchoring of the prestressed anchor plate 23 of each layer.
本发明的有益效果是：本发明所述的新型桩板墙预应力锚托板柔性支护体系及其施工方法，是针对填方工程的柔性支护体系，特别适用于湿陷性黄土地区填方工程和工后沉降较大的高填方工程。该体系能够根据土质情况（是否具有湿陷性）、填方高度及预计的工后沉降量大小选择拉杆的形式（锚索或螺纹钢），柔性的锚索能够避免由于土体产生湿陷和较大的工后沉降对支护结构产生的不利影响（刚性拉杆的折断）。体系是通过桩地面以下的插入深度范围内的被动土压力、填料与锚托板之间的摩擦力共同保障结构的稳定性。产生的破坏形态将是圆弧滑动破坏，潜在滑移面的存在使得边坡顶面不会出现较宽的裂缝，避免外部环境（降雨、冻融循环等）作用下支护结构破坏的加剧。本发明施工过程简单，只需将填料分层碾压，至设计标高后安放托板，再继续分层碾压，重复上述工序直至填土至桩顶。适用于大型机械进行施工。The beneficial effects of the present invention are: the novel pile-slab wall prestressed anchor supporting plate flexible support system and its construction method described in the present invention are flexible support systems for filling works, and are especially suitable for filling in collapsible loess areas. Square engineering and high filling engineering with large post-construction settlement. The system can select the form of the tie rod (anchor cable or rebar) according to the soil condition (whether it has collapsibility), the filling height and the estimated post-construction settlement. The flexible anchor cable can avoid collapsibility and Larger post-construction settlement has adverse effects on the support structure (breakage of rigid tie rods). The system guarantees the stability of the structure through the passive earth pressure within the insertion depth below the pile ground and the friction between the filler and the anchor plate. The resulting failure form will be circular arc sliding failure. The existence of potential sliding surfaces prevents wide cracks from appearing on the top of the slope, and avoids the aggravation of damage to the support structure under the action of the external environment (rainfall, freeze-thaw cycles, etc.). The construction process of the present invention is simple, and only need to layer-roll the filler, place the supporting plate after reaching the design elevation, continue layer-by-layer rolling, and repeat the above process until the soil is filled to the top of the pile. It is suitable for large machinery for construction.
附图说明Description of drawings
图1为本发明柔性支护体系的立面图，图2为本发明柔性支护体系的剖面图，此处仅示意拉杆同时为螺纹钢的情况，也可同时为锚索，也可是锚索与螺纹钢的组合，图3为拉杆与桩板墙连接大样图，图4为锚索与托板连接大样图，图5为单根拉杆（螺纹钢）与托板连接透视图，图6为拉杆防腐处理截面图，图7为波纹形托板，附图标记及名称为：支护桩1，冠梁2，挡土板3，腰梁4，预留拉杆孔5，拉杆6，防腐材料7，PVC套管8，水泥砂浆9，锚具10，托板11，钢垫板12，封锚混凝土13，填料14，拉杆前段15，拉杆后段16，双面满焊17，锚索18，螺纹钢19，托板所配钢筋20，角钢21，预应力锚托板23，锚头24，凹槽25，波纹形表面26，泄水孔27。Fig. 1 is the elevation view of the flexible support system of the present invention, and Fig. 2 is the cross-sectional view of the flexible support system of the present invention, here only shows the situation that the tie rods are threaded steel at the same time, it can also be the anchor cable at the same time, and it can also be the anchor cable Combination with threaded steel, Figure 3 is a large sample diagram of the connection between the tie rod and the pile-slab wall, Figure 4 is a large sample diagram of the connection between the anchor cable and the supporting plate, and Figure 5 is a perspective view of the connection between a single tie rod (rebar) and the supporting plate, Fig. 6 is a cross-sectional view of the anti-corrosion treatment of the tie rods, and Fig. 7 is a corrugated supporting plate. Anti-corrosion material 7, PVC casing 8, cement mortar 9, anchorage 10, supporting plate 11, steel backing plate 12, anchor concrete 13, filler 14, front section of tie rod 15, back section of tie rod 16, double-sided full welding 17, anchor Cable 18, threaded steel 19, reinforcing bar 20 for supporting plate, angle steel 21, prestressed anchor supporting plate 23, anchor head 24, groove 25, corrugated surface 26, weep hole 27.
具体实施方式detailed description
本发明是一种新型桩板墙预应力锚托板柔性支护体系及其施工方法，如附图1、附图2所示，整个体系均为钢筋混凝土结构。该支护体系由支护桩1、冠梁2、挡土板3、腰梁4、托板11、拉杆6、锚头24七部分组成，是针对填方工程的支护体系，特别适用于湿陷性黄土地区填方工程和工后沉降较大的高填方工程。该体系中支护桩1直径为0.8-1.2m，地面以下采用挖孔成桩，桩端坐落在可靠持力层。冠梁2连接各支护桩1的顶部;在腰梁4处位置设置预留拉杆孔5；在挡土板3的中间位置预留泄水孔27；支护桩1地面以上部分、冠梁2、挡土板3、腰梁4所配钢筋相互连接，现浇为一个整体，钢筋的锚固长度应符合相关规范的要求。该整体通过拉杆6与托板11相连；拉杆6在湿陷性黄土地区或工后沉降大的高填方工程宜采用预应力松弛小、变形能力较好的锚索18。无湿陷性地区和填土厚度不大、工后沉降较小的工程可采用螺纹钢。拉杆6选配钢筋的级别及直径大小由计算确定。若拉杆6为锚索18，则一端通过锚头24与腰梁4连接，另一端也通过锚头24与托板11相连；若拉杆6为螺纹钢，则拉杆6分为拉杆前段15和拉杆后段16，拉杆前段15通过锚头24与腰梁4相连，拉杆后段16通过角钢21与托板所配钢筋20连接，采用双面满焊17工艺。拉杆前段15和拉杆后段16采用双面满焊工艺17连接；拉杆6表面涂抹防腐材料7，外面套装PVC套管8，并用水泥砂浆9包裹。The present invention is a new type of flexible support system for pile-slab walls with prestressed anchor plates and a construction method thereof. As shown in accompanying drawings 1 and 2, the entire system is a reinforced concrete structure. The support system consists of seven parts: support pile 1, crown beam 2, soil retaining plate 3, waist beam 4, supporting plate 11, tie rod 6, and anchor head 24. It is a support system for filling engineering, especially suitable for Filling works in collapsible loess areas and high filling works with large post-construction settlements. In this system, the diameter of the support pile 1 is 0.8-1.2m, and the piles are formed by digging holes below the ground, and the pile ends are located in the reliable bearing layer. The crown beam 2 is connected to the top of each support pile 1; the reserved tie rod hole 5 is set at the 4 positions of the waist beam; the drain hole 27 is reserved in the middle of the retaining plate 3; 2. The reinforcing bars of the soil retaining board 3 and the waist beam 4 are connected to each other and cast in place as a whole, and the anchorage length of the reinforcing bars should meet the requirements of relevant specifications. The whole is connected with the supporting plate 11 through the tie rod 6; the tie rod 6 should adopt the anchor cable 18 with small prestress relaxation and good deformation capacity in the collapsible loess area or the high filling project with large post-construction settlement. Rebar steel can be used in non-collapsible areas and projects with small fill thickness and small post-construction settlement. The level and diameter of the steel bars selected for tie rod 6 are determined by calculation. If the pull rod 6 is an anchor cable 18, one end is connected to the waist beam 4 through the anchor head 24, and the other end is also connected to the supporting plate 11 through the anchor head 24; The rear section 16, the front section 15 of the tie rod is connected with the waist beam 4 through the anchor head 24, and the rear section 16 of the tie rod is connected with the steel bar 20 equipped with the supporting plate through the angle steel 21, and the double-sided full welding 17 process is adopted. The front part 15 of the tie rod and the rear part 16 of the tie rod are connected by double-sided full welding process 17;
托板11形状为矩形或者圆形，厚度为80-100mm，面积大小根据需要提供的抗拔力进行计算。为增加摩擦力，可将托板表面做成波纹形表面26。填料14产生的土压力通过锚具10传至预托板11，该柔性支护体系利用支护桩1插入深度范围内的被动土压力及托板11的锚固力确保结构的稳定性。The supporting plate 11 is rectangular or circular in shape, with a thickness of 80-100mm, and the size of the area is calculated according to the required pull-out force. To increase friction, the surface of the pallet can be made into a corrugated surface 26 . The earth pressure generated by the filler 14 is transmitted to the pre-support plate 11 through the anchor 10, and the flexible support system utilizes the passive earth pressure within the insertion depth of the support pile 1 and the anchoring force of the support plate 11 to ensure the stability of the structure.
拉杆6及与之相连的托板11称为锚托板，锚托板施加预应力后称为预应力锚托板23，锚具10、钢垫板12、封锚混凝土13联合后统称为锚头24。锚托板应水平放置。The tie rod 6 and the supporting plate 11 connected to it are called the anchor supporting plate, and the anchor supporting plate is called the prestressed anchor supporting plate 23 after being prestressed, and the anchor 10, the steel backing plate 12, and the anchoring concrete 13 are collectively called the anchor Head 24. The anchor plate should be placed horizontally.
预应力锚托板23的间距可在腰梁4上任意布置，腰梁4的宽度应大于其高度。The spacing of the prestressed anchor supporting plates 23 can be arranged arbitrarily on the waist beam 4, and the width of the waist beam 4 should be greater than its height.
如图7所示，构件表面可为波纹型26，托板11可根据需要与单根拉杆、或者两根拉杆、或者两根以上的拉杆连接。As shown in Fig. 7, the surface of the component can be corrugated 26, and the supporting plate 11 can be connected with a single pull rod, or two pull rods, or more than two pull rods as required.
如图4所示，角钢21可为螺纹钢，弯曲成90度，连接工艺为双面焊，As shown in Figure 4, the angle steel 21 can be rebar, bent to 90 degrees, and the connection process is double-sided welding,
在实施时，由下而上逐层、分段施工，其施工方法的步骤为：During implementation, construction is carried out layer by layer and in sections from bottom to top, and the steps of the construction method are as follows:
（1）预制托板11。按照计算结果配置托板11所需钢筋20，若拉杆6为锚索18，则在托板内利用PVC套管8预留孔道，支模现浇成型达到一定强度后，将锚索穿过预留孔洞后利用锚具10与托板11相连。拉杆6若为螺纹钢，则拉杆6分为拉杆前段15和拉杆后段16，其中拉杆后段16一部分与托板11所配钢筋20利用角钢21相连，工艺为双面满焊17，支模后现浇成型。托板11的表面可做成波纹形26表面等有利于增加表面面积的形状。(1) Prefabricated pallet 11 . Configure the steel bar 20 required for the supporting plate 11 according to the calculation results. If the tie rod 6 is the anchor cable 18, use the PVC sleeve 8 to reserve a hole in the supporting plate. After the hole is left, the anchorage 10 is used to connect with the supporting plate 11 . If the tie rod 6 is threaded steel, the tie rod 6 is divided into the front part 15 of the tie rod and the rear part 16 of the tie rod, wherein a part of the rear part 16 of the tie rod is connected with the steel bar 20 equipped with the supporting plate 11 by using an angle steel 21. The process is double-sided full welding 17, and the mold Post-cast molding. The surface of supporting plate 11 can be made into corrugated 26 surfaces etc. to be conducive to the shape that increases surface area.
（2）施工支护桩1、压顶冠梁2、挡土板3和腰梁4。支护桩1在地面以下部分进行挖孔成桩，桩端应坐落在可靠的持力层。支护桩1地面以上部分所配钢筋与冠梁2、档土板3和腰梁4所配钢筋相互连接，并支模现浇成一个整体，钢筋的锚固长度应符合相关规范的要求。在挡土板3上用PVC套管8预留泄水孔27，在腰梁4上采用PVC套管8预留拉杆孔5。(2) Construction support pile 1, crown beam 2, retaining plate 3 and waist beam 4. The support pile 1 is dug into a pile below the ground, and the pile end should be located on a reliable bearing layer. The steel bars above the ground of the support pile 1 are connected with the steel bars of the crown beam 2, the soil retaining plate 3 and the waist beam 4, and the formwork is cast in place to form a whole. The anchorage length of the steel bars should meet the requirements of relevant specifications. On soil retaining plate 3, reserve drain hole 27 with PVC sleeve pipe 8, adopt PVC sleeve pipe 8 to reserve pull rod hole 5 on waist beam 4.
（3）待支护桩1、挡土板3、腰梁4的混凝土强度达到85%以上后，方能在墙后进行填料14压实处理。填料14压实应从自然地面标高开始，填料14的压实系数根据边坡稳定性计算中土体参数的要求决定。(3) The filler 14 can be compacted behind the wall after the concrete strength of the support pile 1, the retaining plate 3, and the waist beam 4 reaches more than 85%. The compaction of filler 14 should start from the natural ground level, and the compaction coefficient of filler 14 is determined according to the requirements of soil parameters in slope stability calculation.
（4）安放托板11。待填料14压实处理达到第一排托板11设计标高后，在已压实处理的土层中开设100mmx100mm的凹槽25，将预制的托板11水平放置，拉杆后段16放置于开设好的凹槽25中。若拉杆为锚索18，则与托板11连接的锚头24也应放置于相应的凹槽中。(4) Place the pallet 11. After the filler 14 has been compacted to reach the design elevation of the first row of supporting plates 11, a groove 25 of 100 mm x 100 mm is opened in the compacted soil layer, the prefabricated supporting plates 11 are placed horizontally, and the rear section 16 of the pull rod is placed on the opened in the groove 25. If the pull rod is the anchor cable 18, the anchor head 24 connected with the supporting plate 11 should also be placed in the corresponding groove.
（5）连接拉杆的前段15和后段16。拉杆的前段15一端伸入预留的拉杆孔5，另一端与拉杆后段16相连，连接工艺为双面满焊。(5) Connect the front section 15 and the rear section 16 of the tie rod. One end of the front section 15 of the tie rod extends into the reserved tie rod hole 5, and the other end is connected with the rear section 16 of the tie rod, and the connection process is double-sided full welding.
（6）对拉杆6进行防腐处理。在整个拉杆表面涂一层防腐材料7，套装到PVC套管8中，然后在凹槽25中填塞水泥砂浆9。(6) Perform anti-corrosion treatment on the tie rod 6 . Coat a layer of anti-corrosion material 7 on the surface of the whole tie rod, set it into the PVC casing 8, and then fill the cement mortar 9 in the groove 25.
（7）待水泥砂浆9的强度达到85%以上后，继续进行填料14的压实处理。直至达到第二排托板11的安放位置。(7) After the strength of the cement mortar 9 reaches more than 85%, continue the compaction treatment of the filler 14 . Until the placement position of the second row of pallets 11 is reached.
（8）重复步骤（2）、步骤（3）、步骤（4）、步骤（5）、步骤（6）、步骤（7），直至填至支护桩1桩顶标高。(8) Repeat step (2), step (3), step (4), step (5), step (6), and step (7) until filling up to the top elevation of support pile 1.
（9）对锚托板进行预应力张拉，形成预应力锚托板23，用锚具10将预应力锚托板23与腰梁4紧密连接，然后施工用于保护的封锚混凝土13。(9) Perform prestressed tension on the anchor plate to form a prestressed anchor plate 23, use anchors 10 to tightly connect the prestressed anchor plate 23 to the waist beam 4, and then construct the anchor concrete 13 for protection.
（10）按照此步骤施工下一个工作面的预应力锚托板23、挡土板3、腰梁4和支护桩1，并完成各层预应力锚托板23的张拉与锚固。(10) Follow this step to construct the prestressed anchor plate 23, soil retaining plate 3, waist beam 4 and support pile 1 of the next working face, and complete the tensioning and anchoring of the prestressed anchor plate 23 of each layer.
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| CN108894235B (en) * | 2018-06-26 | 2021-02-26 | 兰州理工大学 | Frame anchor rod assembly type supporting structure without retaining plate and construction method |
| CN108842790A (en) * | 2018-06-26 | 2018-11-20 | 兰州理工大学 | A kind of embankment side slope framework anchor holding frame lattice assembled retaining structure and construction method |
| CN109750681B (en) * | 2019-03-14 | 2024-07-12 | 兰州理工大学 | Filling side slope frame micro-tensioning support anchor plate supporting structure and construction method thereof |
| CN110093871A (en) * | 2019-04-18 | 2019-08-06 | 中铁四院集团西南勘察设计有限公司 | The culvert closing-in structure and its construction method of steep slope region are filled out suitable for height |
| CN110241848B (en) * | 2019-06-20 | 2021-06-11 | 中国十七冶集团有限公司 | Method for connecting precast pile of retaining wall and precast retaining plate |
| CN112482202A (en) * | 2020-10-27 | 2021-03-12 | 中建三局基础设施建设投资有限公司 | Pull rod type multipurpose steel trestle bridge abutment and construction method thereof |
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